JP2007090732A - Ink cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink cartridge wherein the opening of an insertion opening can be carried out by a short amount of stroke when an ink extraction member is inserted. <P>SOLUTION: When an ink extraction tube 1720 is pressed into a projecting part flow passage 762 from an opening 722 through a tapered part passage 761, a joint projection 750 is drawn by the ink extraction tube 1720 by friction between an inner peripheral face 751 and an outer peripheral face of the ink extraction tube 1720, and shifted in the insertion direction of the ink extraction tube 1720. A joint contact part 730 has a structure notched like counter boring by an inner peripheral face 733 and a step face 732. The shift of the joint projection 750 into the insertion direction of the ink extraction tube 1720 is prevented from being directly conducted to a tip 734 of the joint contact part 730. The joint contact part 730 consequently shifts in a direction nearly orthogonal to the insertion direction of the ink extraction tube 1720, so that the amount of stroke for forming an ink flow passage can be made short. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ink cartridge, and more particularly to an ink cartridge capable of opening an insertion port with a short stroke when an ink extraction member is inserted.

  The ink cartridge stores ink supplied to an ink jet recording apparatus (ink jet printer), an ink storage chamber for storing ink, and an ink supply port for supplying ink in the ink storage chamber to the ink jet printer. have. The ink supply port is also referred to as an insertion port because it is an insertion port for an ink extraction needle described later. When the ink cartridge is not attached to the ink jet printer, the ink supply port is closed by a valve so that the ink inside does not leak to the outside.

  The ink cartridge is attached to the ink jet printer by pushing the ink cartridge toward the ink jet printer. The ink jet printer has a hollow ink extraction needle that protrudes.When the ink cartridge is pushed into the ink jet printer and attached, the ink extraction needle pushes up a valve that closes the ink supply port of the ink cartridge. Open the ink supply port. As a result, the ink storage chamber communicates with the ink extraction needle, and ink is supplied to the ink jet printer via the ink extraction needle.

  Japanese Patent Laid-Open No. 2001-113723 (Patent Document 1) discloses that when the ink jet printer is not mounted, a valve (valve) is pressed against an ink supply port (insertion port of an ink extraction needle) by a coil spring to close the ink supply port. On the other hand, when mounted on an ink jet printer, the ink extraction needle inserted into the ink supply port pushes up the valve against the urging force of the coil spring to open the ink supply port, so that ink can be supplied from the ink extraction needle. An ink cartridge is described.

In particular, as shown in FIG. 2 of Patent Document 1, the insertion of the ink extraction needle 104 (the code is the code in Patent Document 1, hereinafter the same in the columns of “Background Art” and “Problems to be Solved by the Invention”) On the cylindrical packing 8 forming the mouth, a flange 32 having a diameter smaller than the outer diameter of the ink extraction needle 104 is formed. The collar 32 is expanded by insertion of the ink extraction needle 104 and is fitted in a liquid-tight manner around the needle 104. In addition, a convex portion 34 surrounding the periphery of the collar portion 32 is formed on the surface of the cylindrical packing 8 on the ink chamber side, and the valve body portion 40 is in close contact with the convex portion 34 so that the ink supply port 6 is provided. It is supposed to be closed.
JP 2001-113723 A (FIG. 2)

  However, according to the ink cartridge of Patent Document 1, when the ink extraction needle 104 is inserted into the collar portion 32, the convex portion 34 is in close contact with the valve body portion 40 due to friction with the ink extraction needle 104 accompanying the insertion. Lift up to the ink chamber side. Therefore, in order to open the ink supply port, it is necessary to push up the valve body 10 beyond the rise of the convex portion 34, and it is necessary to secure a large stroke amount for opening the ink supply port. There was a point.

  SUMMARY An advantage of some aspects of the invention is that it provides an ink cartridge capable of opening an insertion port with a short stroke when inserting an ink extraction member.

  In order to achieve this object, an ink cartridge according to claim 1 has an ink storage chamber for storing ink, and an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head. An ink channel chamber that is detachably mounted and communicates with the ink storage chamber and serves as an ink channel for supplying ink in the ink storage chamber to the outside, and ink in the ink channel chamber Formed by an insertion port forming member that forms an insertion port into which a hollow ink extraction member for extracting the ink that is mounted at the outlet of the inkjet recording apparatus and that protrudes from the ink jet recording apparatus is inserted. An opening / closing valve for opening and closing the insertion port, and a biasing member for biasing the opening / closing valve toward the insertion port forming member to close the insertion port, The insertion port of the member is formed with a tapered portion that is reduced in diameter toward the open / close valve side, and is formed to be smaller in diameter than the outer diameter of the ink extraction member while being continuously provided on the small diameter side of the tapered portion. A sealing portion that is in close contact with the periphery of the ink extraction member during sealing and seals the periphery of the ink extraction member, and a countersink that is connected to the sealing portion and has a diameter larger than the outer diameter of the ink extraction member. A projecting portion is formed around the countersunk portion to close the insertion port in close contact with the opening / closing valve when the ink extraction member is not inserted.

  The ink cartridge according to claim 2 has an ink storage chamber for storing ink, and is detachably attached to an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head. An ink channel chamber that communicates with the ink storage chamber and serves as an ink channel when supplying the ink in the ink storage chamber to the outside; and an ink outlet in the ink channel chamber; and An insertion port forming member for forming an insertion port into which a hollow ink extraction member for extracting ink protruding from the ink jet recording apparatus is inserted, and for opening and closing the insertion port formed by the insertion port forming member And an urging member that urges the opening / closing valve toward the insertion port forming member to close the insertion port, and the insertion port of the insertion port forming member has the opening. A tapered portion that is reduced in diameter toward the valve side, and is formed continuously with the smaller diameter side of the tapered portion and smaller in diameter than the outer diameter of the ink extracting member, and when the ink extracting member is inserted, the ink extracting member And a sealing portion that seals the periphery of the sealing portion, and the sealing portion is in close contact with the open / close valve when the ink extraction member is not inserted. A protrusion that closes the mouth protrudes, and a groove that increases the flexibility of the protrusion is recessed in the outer periphery of the protrusion.

  The ink cartridge according to claim 3 is the ink cartridge according to claim 1 or 2, wherein the insertion port forming member is made of a combustible elastic material.

  According to the ink cartridge of the present invention, when the ink jet recording apparatus is not mounted, the opening / closing valve is urged toward the insertion port by the urging member to be closed, thereby preventing ink leakage from the ink flow path chamber. . On the other hand, when the ink cartridge is mounted on the ink jet recording apparatus, the biasing member is pressed and the biasing member is distorted by inserting the ink extraction member from the insertion port. As a result, the opening / closing valve is separated from the insertion port against the urging force of the urging member, the insertion port is opened, and the ink flow path chamber communicates with the hollow interior of the ink extraction member. As a result, the ink in the ink flow channel chamber flows into the ink extraction member, and the ink is supplied to the recording head.

  According to the ink cartridge of claim 1, the insertion port into which the ink extraction member is inserted is formed to include the tapered portion, the sealing portion, and the countersink portion of the insertion port forming member, and the insertion port The forming member has a protrusion formed around the counterbore. When the ink extraction member is not inserted, the protrusion of the insertion port forming member and the open / close valve are brought into close contact with each other to close the insertion port. On the other hand, when the ink extraction member is inserted, the wall surface around the sealing portion is lifted to the ink flow channel chamber side by friction with the ink extraction member accompanying the insertion.

  However, since the countersunk part formed larger in diameter than the outer diameter of the ink extraction member is continuously provided in the sealing part, and the protrusions are formed around the countersink part. Can be lifted to a small amount. Therefore, there is an effect that the insertion port can be opened with a short stroke when the ink extraction member is inserted.

  According to the ink cartridge of the second aspect, the insertion port into which the ink extraction member is inserted has a tapered portion of the insertion port forming member and a sealing portion. In addition, the insertion port forming member has a protrusion formed around the sealing portion, and a groove that increases the flexibility of the protrusion is formed in the outer periphery of the protrusion. When the ink extraction member is not inserted, the protrusion of the insertion port forming member and the open / close valve are brought into close contact with each other to close the insertion port. On the other hand, when the ink extraction member is inserted, the protrusion formed around the sealing portion due to friction with the ink extraction member accompanying the insertion is lifted to the ink flow channel chamber side.

  However, since a groove for increasing the flexibility of the protrusion is recessed on the outer periphery of the protrusion, the protrusion raised toward the ink flow channel chamber side is released toward the groove, and the protrusion Can be lifted to a small amount. Therefore, there is an effect that the insertion port can be opened with a short stroke when the ink extraction member is inserted.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing an appearance of an ink cartridge 1 according to a first embodiment of the present invention. 2 is an exploded front view of the ink cartridge 1, FIG. 2 (a) is a front view of the case 200, FIG. 2 (b) is a front view of the frame 100, and FIG. FIG. 3 is a front view of the cap 300.

  As shown in FIG. 1, the ink cartridge 1 includes a case 200 that is a housing body that covers substantially the entire frame 100 (see FIG. 2) capable of storing ink, and is welded to the case 200 and is attached to the frame 100. And a cap 300 which is a lid body to be mounted. The case 200 and the cap 300 constitute a housing for the ink cartridge 1.

  As shown in FIG. 2A, the case 200 is formed in a substantially square shape when viewed from the front (viewed in the direction perpendicular to the plane of FIG. 2A), and one end (the lower side in FIG. 2A) is the case opening 210. (See FIG. 3D). The surface facing the case opening 210 (upper side in FIG. 2A) is the case ceiling wall 220, and the space between the case ceiling wall 220 and the case opening 210 is the case side wall 230. The case side wall 230 is provided with two pairs of substantially the same shape of oppositely disposed side walls, and the two pairs of side walls constitute four surfaces of the case side wall 230. A case bending portion curved outward from the case 200 (FIG. 2 (a) in the direction perpendicular to the paper surface) is formed on the side wall having the larger surface area (the side wall in the direction perpendicular to the paper surface) of the two pairs of side walls. 240 is formed. The case bending portion 240 forms a space for storing the frame 100 filled with ink and also acts to increase the strength of the case 200.

  As shown in FIG. 2B, the frame 100 serves as an ink reservoir, and is formed at the frame main body 110 serving as the main body of the frame 100 and the center of the frame main body 110, and stores ink. An ink storage section 120 that is a space to be used, a substantially cylindrical ink dispensing section 130 that dispenses (injects) ink into the ink storage section 120, and an ink jet printer 1710 (see FIG. 26) and a substantially cylindrical ink supply unit 140 that protrudes substantially parallel to the ink supply unit 140, and restricts movement of the frame 100 in the direction perpendicular to the paper surface when the frame 100 is attached to the cap 300. And a frame restricting unit 150. 2B shows a state in which a space for storing ink is not formed, and a film 1430 (see FIG. 19) is welded to the frame main body 110 as will be described later. Thus, the film 1430 and the ink reservoir 120 define a space that becomes an ink reservoir. A detailed description of each configuration of the frame 100 will be described later.

  As shown in FIG. 2C, the cap 300 includes a cap bottom wall 310 that forms the bottom surface of the ink cartridge 1, a cap side wall 320 erected from the outer edge of the cap bottom wall 310, and an ink supply for the frame 100. And a cap through hole 330 (see FIG. 5D) formed at a position corresponding to the portion 140. On the cap side wall 320, a cap bending portion 340 that is curved outward (in the direction perpendicular to the plane of FIG. 2C) of the cap 300 is formed corresponding to the case bending portion 240 of the case 200. As shown in FIG. 1, the cap 300 is welded to the case 200 so that a part of the case side wall 230 of the case 200 (the end on the case opening 210 side) is surrounded by the cap side wall 320.

  Next, the case 200 will be described with reference to FIGS. 3 and 4. 3 is a six-sided view of the case 200, FIG. 3 (a) is a diagram showing the front and back of the case 200, and FIG. 3 (b) is a diagram illustrating the left and right sides of the case 200. FIG. 3C is a diagram illustrating a plan view of the case 200, and FIG. 3D is a diagram illustrating a bottom surface of the case 200. 4 is a cross-sectional view taken along line IV-IV in FIG. 3A is the same as FIG. 2A, and detailed description thereof is omitted.

  As shown in FIG. 3B, the case 200 is configured such that the lateral width of the case 200 (the width in the left-right direction in FIG. 3B) increases from the case ceiling wall 220 toward the case opening 210. . On the other hand, the lateral width of the case bending portion 240 is formed to be substantially constant. The case bending portion 240 has a predetermined range from the case opening 210 to the upper end portion of the case side wall 230 (the upper end portion in FIG. 3B) in the vertical direction of the case side wall 230 (the vertical direction in FIG. 3B). It is formed to be empty. The upper end portion of the case side wall 230 where the case bending portion 240 is not formed is a case handle portion 250, which acts as a handle held by the user when the ink cartridge 1 is mounted on the ink jet printer 1710 (see FIG. 26). To do.

  As shown in FIG. 3C, the case handle 250 is formed to bend inward of the case 200 (in the up-down direction in FIG. 3C). Therefore, the case handle portion 250 has a shape that is easy for the user to grasp. Further, when the case 200 is pushed into the mounting portion of the inkjet printer 1710 (see FIG. 26) with the case handle 250, the case 200 slides from the hand because the user touches the case bending portion 240. Can be reduced. Therefore, the mounting property of the ink cartridge 1 to the ink jet printer 1710 can be improved as compared with the case 200 having a substantially rectangular parallelepiped shape.

  As shown in FIG. 3D, a case projecting member 260 formed by projecting toward the case opening 210 of the case 200 is disposed on the case ceiling wall 220 of the case 200. As shown in FIG. 4, the case protrusion member 260 protrudes to the portion of the case 200 where the case handle 250 is formed. The case protrusion member 260 presses a part of the ink dispensing unit 130 of the frame 100 in order to fix the frame 100 so as not to swing due to vibration or the like in a state where the frame 100 is housed in the case 200. However, the detailed description thereof will be described later.

  As shown in FIG. 4, the case opening 210 of the case 200 includes a first opening end surface 211 positioned outward of the case 200, and a second opening end surface 212 positioned inside the case 200 of the first opening end surface 211. have. As shown in the enlarged view of FIG. 4, the first opening end surface 211 and the second opening end surface 212 are formed in a stepped shape so as to partially remove the end surface of the case opening 210, and the case 200 is a cap. When attaching to 300, it attaches so that the cap protrusion member 350 (refer FIG. 6) of the cap 300 may contact | abut on the level | step difference of the 1st opening end surface 211 and the 2nd opening end surface 212. FIG. Therefore, since the cap protrusion member 350 is located inside the case 200, it is possible to reduce a shift in the attachment position of the case 200 and the cap 300.

  Next, the cap 300 will be described with reference to FIGS. 5 and 6. 5 is a six-sided view of the cap 300, FIG. 5 (a) is a diagram showing the front and back of the cap 300, and FIG. 5 (b) is a diagram showing the left and right sides of the cap 300. FIG. 5C is a diagram showing the inner surface of the cap 300, and FIG. 5D is a diagram showing the bottom surface of the cap 300. 6 is a view showing a cross section of the cap 300, FIG. 6 (a) is a cross-sectional view taken along the line VIa-VIa of FIG. 5 (c), and FIG. 6 (b) is a view shown in FIG. It is sectional drawing in the VIb-VIb line | wire. 6A and 6B is a virtual line indicating the position when the frame 100 and the case 200 are attached to the cap 300. FIG. 5A is the same as FIG. 2C, and a detailed description thereof is omitted.

  As shown in FIG. 5 (b), the cap 300 is formed such that the cap bending portion 340 is bilaterally symmetrical when viewed from the side (viewed in the direction perpendicular to the paper surface of FIG. 5 (b)). Further, the cap side wall 320 is erected in a substantially vertical direction (the vertical direction in FIG. 5B) with respect to the cap bottom wall 310.

  As shown in FIG. 5 (c), a cap projection member 350 is erected on the inner surface of the cap side wall 320 on the inner surface of the cap 300 at a predetermined distance from the cap side wall 320. As shown in FIG. 6A, the cap protrusion member 350 is formed extremely low with respect to the longitudinal direction of the cap side wall 320 (the vertical direction in FIG. 6A). When the case 200 is attached to the cap 300, the cap protrusion member 350 abuts on the step formed by the first opening end surface 211 and the second opening end surface 212 of the case opening 210 described above.

  As shown in FIG. 5C, a substantially cylindrical cap joining portion 360 (on the left side of FIG. 5C) to which the ink supply portion 140 of the frame 100 is joined is disposed inside the cap protrusion member 350 on the inner surface of the cap 300. ) And a pair of cap restricting members 370 (on the right side in FIG. 5C) that abut against the frame restricting portion 150 of the frame 100 and restrict the movement of the frame 100.

  The cap joint portion 360 is formed in a substantially circular shape when viewed in the direction perpendicular to the plane of FIG. 5C, and extends to a position substantially equal to the height of the cap side wall 320 as shown in FIG. It is formed in a shape. The cap joint portion 360 has a pair of cap guide grooves 361 into which the frame loose insertion member 141 (see FIG. 7) of the ink supply portion 140 is loosely inserted, and an upper end surface (upper end surface in FIG. 6A) of the cap joint portion 360. ) Toward the cap bottom wall 310 (downward in FIG. 6A). The cap guide groove 361 is disposed symmetrically about the axis A (see FIGS. 5C and 6A) of the cap joint 360, and the depth of the cap guide groove 361 in the direction of the axis A This is approximately half the height of the cap joint 360 in the direction of the axis A.

  As shown in FIG. 6A, the cap joint portion 360 is formed with a pair of cap joint holes 362 that join with the frame joint member 142 (see FIG. 7) of the ink supply unit 140. The cap joint holes 362 are disposed symmetrically about the axis A of the cap joint portion 360 and are disposed on a straight line that is substantially orthogonal to the straight line connecting the cap guide grooves 361. The position of the cap joint hole 362 in the direction of the axis A is substantially the same as the lower end portion of the cap guide groove 361.

  The cap regulating member 370 is composed of a pair of flat plate members and is erected from the inner surface of the cap bottom wall 310. The space between the cap regulating members 370 is configured to be approximately equal to the diameter of the cap joint portion 360. In addition, as shown in FIG. 6B, the height of the cap regulating member 370 in the direction of the axis A is formed in substantially half of the cap side wall 320. If the height of the cap restricting member 370 is too low, the movement of the frame 100 cannot be restricted. On the other hand, if the height of the cap restricting member 370 is too high, it becomes an obstacle when the frame 100 is attached to the cap 300. In the first embodiment, by forming the height of the cap regulating member 370 in the direction of the axis A in substantially half of the cap side wall 320, the movement of the frame 100 can be reliably regulated and the work of attaching the frame 100 can be performed. It is possible to prevent the efficiency from decreasing.

  Further, the cap regulating member 370 regulates the rotational movement of the frame 100 with respect to the cap 300 around the cap joint 360 when the frame 100 is attached to the cap 300, and therefore the distance from the cap joint 360. The person who is far away can accurately control the movement. In the first embodiment, as shown in FIG. 5C, the cap joint portion 360 and the cap regulating member 370 are formed on both sides of the cap 300 (positions shifted from the center away from each other). The movement of the frame 100 can be accurately regulated. In order to accurately control the movement of the frame 100, the distance between the cap joint portion 360 and the cap restricting member 370 may be further increased (ie, left and right in FIG. 5C). In this configuration, the positions of the frame supply part 140 and the frame restriction member 150 of the frame 100 are determined according to the positions of the cap joint part 360 and the cap restriction part 370.

  As described above, the attachment of the frame 100 and the cap 300 is performed while the ink supply part 140 is guided by the cap guide groove 361 of the cap joint part 360 and the movement is restricted by the cap restricting member 370. Positioning of the 100 with respect to the cap 300 can be easily performed. Further, since the frame joining member 142 of the ink supply unit 140 is joined to the cap joining hole 362 of the cap joining unit 360, the frame 100 and the cap 300 are connected, so that the frame 100 and the cap 300 are welded. The frame 100 and the cap 300 can be attached by a simplified process.

  As shown in FIG. 5 (d), a cap through-hole 330 is formed in the cap bottom wall 310 of the cap 300 at a position corresponding to the cap joint portion 360. The center of the cap through-hole 330 is located on the axis A of the cap joint portion 360. The cap through-hole 330 is a hole through which an ink extraction tube 1720 (see FIG. 26) disposed on the ink jet printer 1710 side is inserted when the ink cartridge 1 is mounted in the ink jet printer 1710 (see FIG. 26). As shown in FIG. 6A, the cap through-hole 330 is formed in a tapered shape whose diameter decreases from the outer end face of the cap bottom wall 310 toward the inner side. Therefore, when the ink extraction tube 1720 is inserted into the cap through hole 330, the ink extraction tube 1720 is inserted while being guided by the tapered inclined surface of the cap through hole 330, so that the ink cartridge 1 can be mounted smoothly. .

  Next, the frame 100 will be described with reference to FIGS. 7 is a diagram showing the frame 100, FIG. 7A is a diagram showing the front of the frame 100, and FIG. 7B is a diagram showing the back of the frame 100. FIG. FIG. 8 is a view showing the frame 100, FIG. 8A is a view showing the left side of the frame 100, and FIG. 8B is a view showing the right side of the frame 100. FIG. 8C is a diagram showing a plane of the frame 100, and FIG. 8D is a diagram showing a bottom surface of the frame 100. FIG. 9 is a view in which the ribs of the frame 100 are emphasized. In the following description, the horizontal direction in FIG. 7A is the horizontal direction of the frame 100 (or the frame main body 110), and the vertical direction in FIG. 7A is the vertical direction of the frame 100 (or the frame main body 110). The direction.

  As shown in FIG. 7A, the frame main body 110 of the frame 100 is formed with a through-hole that becomes the ink reservoir 120, and as shown in FIGS. 7A and 7B, The ink reservoir 120 has a pair of openings 125 on both sides of the frame main body 110. Each of these openings 125 is connected to the frame flange portion 112. On the frame flange portion 112, a substantially circular shape is formed at a slight distance from the opening 125 and protrudes to the front side (the front side in FIG. 7 (a) in the direction perpendicular to the paper surface) so as to be surrounded at a position close to the opening 125. The frame projection member 111 is formed. This frame projection member 111 serves as a welding location (annular band region) when the film 1430 (see FIG. 19) is welded to the frame main body 110. In addition, the welding process of the film 1430 will be described later.

  As shown in FIG. 7A, the ink reservoir 120 is formed with an ink dispensing hole 121 that communicates with the ink dispensing unit 130 and an ink supply hole 122 that communicates with the ink supply unit 140. In addition, the ink storage section 120 has a substantially circular frame communication hole 123 that communicates the front side and the back side with a substantially center in the width direction of the ink storage section 120 (direction perpendicular to the paper surface of FIG. 7A). It is formed in the part. Further, the ink storage unit 120 includes a pair of frame inclined surfaces 124 that are inclined toward the frame communication holes 123 from the openings 125 on the front surface side and the back surface side of the frame main body 110. A peripheral wall of the ink reservoir 120 is formed by the pair of frame inclined surfaces 124. Since the ink dispensing holes 121 are formed in the frame inclined surface 124, the ink injected from the ink dispensing holes 121 into the ink storage portion 120 can be poured along the frame inclined surface 124. In addition, it is possible to suppress bubbling of the ink injected into the ink storage unit 120.

  Here, the ink supply unit 140 will be described. As shown in FIG. 7A, the ink supply unit 140 has a cap guide groove 361 (FIG. 6) in the cap joint portion 360 at opposite positions (right and left in FIG. A pair of frame insertion members 141 that are loosely inserted in (a) are formed to project radially outward from the outer periphery. Further, a pair of frame joining members 142 joined to the cap joining holes 362 (see FIG. 6A) of the cap joining part 360 described above are formed on the outer periphery of the ink supply part 140. The pair of frame joining members 142 are located on a straight line that is substantially orthogonal to a straight line connecting the pair of frame slow insertion members 141. As shown in FIG. 8A or FIG. 8B, the frame joining member 142 has a horizontal surface that protrudes in the horizontal direction (FIG. 8 (a) left-right direction), and the ink goes toward the lower part. It inclines so that the outer peripheral wall of the supply part 140 may be approached. The frame joint member 142 is smoothly inserted into the cap joint portion 360, and the frame 100 and the cap 300 are joined (locked) by the horizontal surface above the frame joint member 142.

  As shown in FIG. 7B, the frame 100 in the rear view (viewed in the direction perpendicular to the plane of FIG. 7B) has the frame protrusion member 111, the frame communication hole 123, and the frame inclined surface 124 in front view (FIG. 7B). a) It is formed in the same position and in the same shape as the frame 100 in the vertical direction of the drawing. The ink supply hole 122 is shown at a position inverted with respect to FIG. Further, since the ink supply hole 122 is formed at the tip of the frame inclined surface 124 on the frame communication hole 123 side, the ink stored in the ink storage unit 120 can be used up. This is because if the ink supply hole is formed in the frame inclined surface 124, the film adheres to the frame inclined surface 124 and closes the ink supply hole before the ink in the ink reservoir 120 is used up. This is because the ink supply hole 122 is not blocked by the film 1430 (see FIG. 19) until the ink supply hole 122 is formed at the front end portion of the ink 124 until the ink in the ink storage portion 120 is used up.

  In addition, a different part between the front view and the rear view of the frame 100 is an ink dispensing hole 121 communicating with the ink dispensing unit 130. As shown in FIG. 7B, the ink reservoir 120 is not formed with the ink dispensing hole 121. That is, since the ink dispensing hole 121 is formed only on one end side (the front view side in FIG. 7A) of the frame 100, the ink is dispensed from one place.

  As shown in FIGS. 7A and 7B, the frame main body 110 is formed in a substantially quadrangular shape when viewed in the direction perpendicular to the plane of the paper, and frame collars 112 are formed at four corners thereof. Yes. As shown in FIG. 8A, the frame flange portion 112 is connected to the two openings 125 of the ink storage portion 120 on the front side and the back side of the frame 100 and extends to the outside of the frame protrusion member 111 surrounding the opening 125. A pair of extended flanges are provided, each of which is formed in a plate shape, and sandwiches the ink dispensing unit 130 and the ink supply unit 140 as shown in FIGS. 8 (c) and 8 (d). It is configured. Further, as shown in FIGS. 8C and 8D, the pair of frame flange portions 112 are formed with the above-described frame protruding members 111, respectively. The pair of frame flanges 112 serve as receiving surfaces for the film 1430 when the film 1430 is welded to the frame projection member 111. Further, a pair of frame restricting members 150 are provided so as to be connected to the frame flange portion 112. In addition, since the frame collar part 112 is formed in a thin plate shape and a space is formed between the frame collar part 112 on the back side, the strength of the frame collar part 112 is weakened. In order to maintain the strength of the frame flange 112, frame rib members 410, 420, 430, 440, 450, 460, 470, 480, and 490 are formed. Hereinafter, the frame rib members 410 to 490 will be described.

  As shown in FIG. 8 (c), the frame rib members 410, 420, 430, and 440 (first frame) for connecting the pair of frame collars 112 and maintaining their strength between the pair of frame collars 112 are provided. 1 reinforcing rib) is formed. As shown in FIG. 9, the frame rib member 410 is provided near one end in the lateral direction of the frame main body 110, and is formed in a flat plate shape as shown in FIG. 8C. As shown in FIG. 8, the frame 100 is formed so as to extend from the vicinity of the upper end of the frame main body 110 to an intermediate position in the vertical direction (the vertical direction in FIG. 8A).

  The frame rib member 420 includes a rib column part 421 formed in a substantially columnar shape and a pair of rib protrusions 422 protruding from the rib column part 421 toward the frame flange part 112. As shown in FIG. 9, the frame rib member 420 is formed to extend in the vertical direction from the outer edge on the upper end side of the frame main body 110 to the vicinity of the ink reservoir 120. The frame rib member 420 is formed closer to the center side of the frame main body 110 than the frame rib member 410 in the lateral direction of the frame main body 110 (the left-right direction in FIG. 9). Therefore, the vertical distance of the frame flange portion 112 is shortened, and as a result, the length of the frame rib member 420 is also shortened.

  Similar to the frame rib member 410, the frame rib member 430 is formed in a flat plate shape at the center in the horizontal direction of the frame main body 110, and extends in the vertical direction from the outer edge on the upper end side of the frame main body 110. As shown in FIG. 9, it is formed in the same manner as the frame rib member 420.

  As shown in FIG. 9, the frame rib member 440 is provided in the vicinity of the other end in the lateral direction of the frame main body 110, and similarly to the frame rib member 420, a substantially cylindrical rib column part 441 and its rib column part A pair of rib projecting portions 442 projecting from the frame 441 toward the frame flange portion 112. As shown in FIG. 8B, the frame rib member 440 is formed to extend from the vicinity of the upper end of the frame main body 110 to the intermediate position in the longitudinal direction of the frame 100 (the vertical direction in FIG. 8B). ing.

  Further, as shown in FIG. 8C, in the horizontal direction of the frame main body 110, the ink dispensing unit 130 is formed to extend in the vertical direction between the frame rib member 430 and the frame rib member 440. Has been. The ink dispensing part 130 has a function as a frame rib member because a part of its outer peripheral surface is connected to the pair of frame collars 112.

  As shown in FIG. 8D, frame rib members 450, 460, 470, and 480 (first reinforcing ribs) for maintaining the strength of the frame flange 112 are formed between the frame flanges 112. Yes. The frame rib member 450 includes a rib column part 451 formed in a substantially columnar shape and a pair of rib protrusions 452 protruding from the rib column part 451 toward the frame flange part 112. As shown in FIG. 9, the frame rib member 450 is formed in the vicinity of one end in the horizontal direction of the frame main body 110, and as shown in FIG. 8A, the frame rib member 450 is in the vertical direction (FIG. 8A, vertical direction). ) To extend from the vicinity of the lower end of the frame body 110 to an intermediate position.

  Similar to the frame rib member 450, the frame rib member 460 includes a substantially cylindrical rib column part 461 and a pair of rib protrusions 462 protruding from the rib column part 461 toward the frame flange 112. Yes. As shown in FIG. 9, the frame rib member 460 is formed to extend in the vertical direction from the outer edge on the lower end side of the frame main body 110 to the vicinity of the ink reservoir 120. The frame rib member 460 is formed at the center of the frame main body 110 in the lateral direction of the frame main body 110. Therefore, the vertical distance of the frame flange portion 112 is shortened, and as a result, the length of the frame rib member 460 is also shortened.

  The frame rib member 470 is formed in a flat plate shape and extends in the vertical direction, and the length thereof is shorter than the frame rib member 450 and slightly longer than the frame rib member 460, as shown in FIG. Has been. The frame rib member 480 is formed in a flat plate shape like the frame rib member 470 and is provided in the vicinity of the other end in the lateral direction of the frame main body 110 as shown in FIG. 9, and is shown in FIG. As described above, the frame 100 is formed so as to extend from the vicinity of the lower end of the frame main body 110 to the intermediate position in the vertical direction (vertical direction in FIG. 8B).

  Further, as shown in FIGS. 8D and 9, in the horizontal direction of the frame main body 110, the cylindrical ink supply unit 140 extends in the vertical direction between the frame rib member 450 and the frame rib member 460. It is formed to exist. The ink supply unit 140 has a function as a frame rib member because a part of the outer peripheral surface thereof is connected to the pair of frame flanges 112.

  Further, as shown in FIGS. 8A and 8B, the frame rib member 410 and the frame rib member 450 or the frame rib member 440 and the frame rib member 480 are located at intermediate positions in the vertical direction of the frame main body 110. And a pair of frame rib members 490 (second reinforcing ribs) are formed. As shown in FIG. 9, the pair of frame rib members 490 are arranged on the same straight line from the outer edge on the side end side of the frame main body 110 (the end in the horizontal direction of the frame main body 110) to the ink reservoir 120. It is formed extending in a direction orthogonal to the direction (frame rib members 410 to 480).

  Further, as shown in FIGS. 7 and 8D, a frame restricting portion 150 protrudes from each of the pair of frame flange portions 112, and a pair of frame restricting portions 150 are provided in parallel to each other. The interval between the pair of frame restricting portions 150 is an interval that fits between the pair of cap restricting members 370 formed on the cap 300.

  Here, the frame main body 110 is formed of a resin material, and the molding is performed by mold molding. For example, in the mold forming, two molds corresponding to the frame rib members 410 to 440 and the frame rib members 450 to 480 are prepared with the frame rib member 490 as a boundary, and the two molds are combined. In this state, a liquid (or semi-finished) resin is poured into the mold and cooled to mold the frame main body 110. Accordingly, the pair of frame rib members 490 are formed of resin poured into a gap formed between the two molds in a combined state. After the resin material is cured, the frame main body 110 molded by moving the two molds away from each other, that is, in the vertical direction (vertical direction in FIG. 8B) is removed from the mold. Since all of 410 to 480, the ink dispensing unit 130, and the ink supply unit 140 extend in the vertical direction, the frame main body 110 can be easily removed without hindering the vertical movement of the mold. .

  In this way, only the pair of frame rib members 490 are formed to extend in the lateral direction, and the other frame rib members 410 to 480, the ink dispensing unit 130, and the ink supply unit 140 are extended in the vertical direction. Therefore, the frame main body 110 can be molded with a simple mold structure including two molds, despite the fact that a large number of members for reinforcing the pair of frame collars 112 are provided. Thus, the reinforcement of the frame flange 112 and the reduction of the mold cost are compatible.

  The rib cylindrical portions 421, 441, 451, and 461 also function as receiving portions that are pushed by the eject pins when the frame main body 110 is removed from the mold.

  As described above, the frame flange portion 112 is formed in a flat plate shape, and the strength of the frame flange portion 112 is weakened. However, the strength of the frame flange portion 112 is provided by including the frame rib members 410 to 490. Can keep. As a result, the strength of the frame main body 110 itself increases. As will be described later, since the film 1430 (see FIG. 19) is welded to the frame main body 110 by pressing the film 1430 against the frame collar 112 of the frame main body 110, the film is deformed when the frame collar 112 is bent. 1430 cannot be welded to the correct position. Furthermore, the frame main body 110 may be damaged. However, as shown in FIG. 9, the frame rib members 410 to 490 are formed so as to extend substantially over the entire frame main body 110, so that the frame main body 110 can be prevented from being damaged and the frame 1430 is welded when the film 1430 is welded. It can prevent that the collar part 112 bends.

  Further, as shown in FIG. 9, the central axis of the ink dispensing unit 130 and the central axis of the ink supply unit 140 are in the horizontal direction of the frame main body 110 (the left-right direction in FIG. 9). 110) (a straight line that passes through the frame rib member 430 and the frame rib member 460) and is shifted (shifted) from the center line. When the ink dispensing unit 130 and the ink supply unit 140 are positioned on the center line of the ink storage unit 120, the ink storage unit 120 is formed in a substantially circular shape, so that the distance protruding outward from the frame body 110 is long. Become. For this reason, the size of the frame main body 110 is increased, and the ink cartridge 1 is also increased. However, since the ink dispensing unit 130 and the ink supply unit 140 are formed at positions shifted from the center line of the ink storage unit 120, the ink cartridge 1 can be reduced in size.

  In addition, when the ink storage part 120 is formed in a substantially ellipse, it can be similarly reduced in size.

  Next, the component configuration of the frame 100 will be described with reference to FIG. FIG. 10 is an exploded front view of the frame 100.

  As shown in FIG. 10, the frame 100 is disassembled into four parts. The three parts are mainly a frame main body 110 having an ink storage part 120, an ink dispensing part 130, an ink supply part 140, and a frame regulating member 150, and a film 1430 to be welded to the frame main body 110 (see FIG. 19). An ink dispensing plug 520 inserted into the ink dispensing unit 130 and a valve mechanism 530 inserted into the ink supply unit 140. Of these four components, an ink reservoir is mainly constituted by the frame main body 110 and the film 1430. Further, a portion that forms the ink storage portion 120 corresponding to the central portion of the frame main body portion 110 is an ink storage chamber forming portion. Next, the valve mechanism 530 will be described with reference to FIG.

  FIG. 11 is an exploded front view of the valve mechanism 530. As shown in FIG. 11, the valve mechanism 530 has an insertion port for the ink extraction tube 1720 (see FIG. 26) of the inkjet printer 1710, and has elasticity such as rubber that is partially exposed to the outside of the ink supply unit 140. A joint member 610 made of a resin material, a valve member 620 that closes the ink flow path when the joint member 610 comes into contact with the bottom wall, and a resinous elastic material housed in the valve member 620. The first spring member 630 that is configured, and the one-axis direction that covers the open surface of the valve member 620 and that is the moving direction of the valve member 620 pressed by the ink extraction pipe 1720 (the arrow B direction in FIG. Slider member 640 operable in the direction of the center B) and the same as the first spring member 630 housed in the slider member 640. A second spring member 650 formed in the same shape with a material, a valve seat member 660 that contacts the second spring member 650 and receives the check valve 670, and a check valve 670 between the valve seat member 660 And a cover member 680 for covering. Since the valve mechanism 530 can be assembled integrally, the assembling work to the ink supply unit 140 is facilitated. The joint member 610, the valve member 620, the first and second spring members 630 and 650, the slider member 640, the valve seat member 660, the check valve 670 and the cover member 680 will be described below with reference to FIGS. To do. In the following description, the axis of the valve mechanism 530 will be described as the axis B (see FIG. 11).

  12 is a view showing the joint member 610, FIG. 12 (a) is a view showing the side surface of the joint member 610, and FIG. 12 (b) is a view showing the plane of the joint member 610. FIG. 12C is a view showing the bottom surface of the joint member 610, and FIG. 12D is a cross-sectional view taken along the line XIId-XIId of FIG.

  As shown in FIG. 12A, the joint member 610 is formed in three stages in a side view (see FIG. 12A in a direction perpendicular to the paper surface). A portion shown in the lowermost step (lower side in FIG. 12A) is a portion exposed to the outside of the ink supply unit 140, and is a joint outer peripheral portion 710 that forms the outer peripheral portion of the joint member 610. The upper portion of the joint outer peripheral portion 710 is a joint inner peripheral portion 720 which is disposed inside the ink supply unit 140 and forms the inner peripheral portion of the joint member 610. FIG. The upper part of the joint inner peripheral part 720 is illustrated. Further, the upper portion of the joint inner peripheral portion 720 is a joint contact portion 730 that contacts the valve member 620. As illustrated in FIG. 12B, the shaft centers of the joint outer peripheral portion 710, the joint inner peripheral portion 720, and the joint contact portion 730 are located on the same axis as the shaft center B of the valve mechanism 530. The joint member 610 is made of an elastic material such as resin rubber.

  As shown in FIG. 12 (d), a joint groove 740 having a concave cross section is formed between the joint outer periphery 710 and the joint inner periphery 720. As shown in FIG. 12B, the joint groove portion 740 is formed in a circular shape in a plan view, and the lower end portion of the outer peripheral wall of the ink supply portion 140 formed in a cylindrical shape is fitted into the joint groove portion 740. The member 610 is fixed to the ink supply unit 140. As shown in FIG. 12D, a joint contact portion 730 protrudes from the upper surface 731 of the joint inner peripheral portion 720 (the surface on the side in contact with the valve member 620). The joint abutting portion 730 is formed so as to be narrower toward the tip end portion 734 (the upper end portion in FIG. 12D), and the tip end portion 734 abuts against the bottom surface of the valve member 620 so that the ink flow path. Block. Further, the joint inner peripheral portion 720 is formed on the joint protrusion portion 750 protruding from the inner peripheral surface toward the axis B and the bottom surface 721 of the joint inner peripheral portion 720 (lower side in FIG. 12D). An opening 722 serving as an insertion port for the ink extraction tube 1720 (see FIG. 26) and a tapered surface 723 formed between the opening 722 and the joint protrusion 750 are formed.

  Further, as shown in FIG. 12D, the joint member 610 has an ink flow that penetrates from the bottom surface 721 of the joint inner peripheral portion 720 to the tip end portion 734 of the joint contact portion 730 (lower side in FIG. 12D). A path 760 is formed. The ink flow path 760 includes an opening 722 formed in the bottom surface 721, a tapered portion flow path 761 defined by a tapered surface 723 provided continuously to the opening 722, and a joint protrusion 750 connected to the tapered surface 723. A protrusion channel 762 defined by the inner peripheral surface 751, a step surface 732 provided continuously with the inner peripheral surface 751 of the joint protrusion 750, and an inner periphery of the joint contact portion 730 provided continuously with the step surface 732 The contact portion channel 763 is defined by the surface 733. The inner peripheral surface 751 of the joint projection 750 is parallel to the axis B, and the step surface 732 is orthogonal to the axis B.

  The tapered channel 761 is formed in a substantially hollow conical shape whose diameter gradually decreases from the opening 722 toward the continuous contact point with the inner peripheral surface 751 of the joint projection 750. The protrusion channel 762 is formed in a substantially hollow cylindrical shape having the same inner diameter as the minimum inner diameter of the taper channel 761. The inner diameter of the protrusion channel 762 is slightly smaller than the diameter of the ink extraction tube (see FIG. 26). The contact portion flow path 763 is formed in a substantially hollow cylindrical shape having an inner diameter larger than that of the protruding portion flow path 762, and the inner diameter is sufficiently larger than the diameter of the ink extraction tube. Since the step surface 732 is formed at the boundary between the protrusion channel 762 and the contact channel 763, the inner diameter in the axial direction B from the projection channel 762 to the contact channel 763 is abrupt. Has changed. Accordingly, as shown in FIG. 12D, the joint contact portion 730 has a structure that is notched in a staggered shape by the inner peripheral surface 733 and the stepped surface 732, and the notch portion. The tip end portion 734 of the joint abutting portion 730 is positioned around the periphery.

  The ink extraction tube 1720 inserted from the opening is guided by the tapered surface 723 of the tapered channel 761 and inserted into the protruding channel 762. At this time, since the inner diameter of the protrusion channel 763 is slightly smaller than the diameter of the ink extraction tube 1720, the ink extraction tube 1720 is elastically applied to the inner peripheral surface 751 of the joint protrusion 750 that forms the protrusion channel 763. It is press-fitted so as to closely contact and push the protrusion channel 763. In other words, the joint protrusion 750 acts to seal the periphery of the ink extraction tube 1720 press-fitted into the protrusion flow path 763. In addition, when the area of the portion of the joint member 610 that elastically adheres to the outer periphery of the ink extraction tube 1720 increases, the resistance when the ink cartridge 1 is attached to the ink jet printer 1710 (see FIG. 26) increases, and the attachment is smooth. Will not be able to. However, in the first embodiment, the joint protrusion 750 is provided so as to contact the ink extraction tube 1720 only on the inner peripheral surface 751, so that the contact surface with the ink extraction tube 1720 can be reduced to reduce the ink jet. Attachment to the printer 1710 can be performed smoothly. Since the ink extraction pipe 1720 is inserted into the ink flow path 760, the flow path through which the ink actually flows is inside the ink extraction pipe 1720. Further, by forming the contact flow path 763 in a spot shape, the displacement of the joint member 610 in the direction of the axis B when the ink extraction tube 1720 is inserted can be reduced. It will be described later.

  13 is a view showing the valve member 620, FIG. 13 (a) is a view showing the front surface and the back surface of the valve member 620, and FIG. 13 (b) is a view showing the left side surface of the valve member 620. FIG. 13C is a diagram showing a plane of the valve member 620, FIG. 13D is a diagram showing a bottom surface of the valve member 620, and FIG. (E) is sectional drawing in the XIIIe-XIIIe line | wire of FIG.13 (c).

  As shown in FIG. 13A, the valve member 620 includes a valve bottom wall 810 that forms a bottom surface of the valve member 620 (a lower surface in FIG. 13A), and an axial center B direction from the valve bottom wall 810. And a valve outer peripheral wall 820 standing upright. The valve outer peripheral wall 820 is formed with a pair of valve guide grooves 830 into which the slider loose insertion member 1030 (see FIG. 15) of the slider member 640 is loosely inserted. As shown in FIG. 13C, the pair of valve guide grooves 830 are formed symmetrically with respect to the axis B of the valve mechanism 510. Further, as shown in FIG. 13A, the valve guide groove 830 is formed in the entire valve outer peripheral wall 820 in the axis B direction. A pair of valve restricting portions 840 that project in the opposite direction of the valve bottom wall 810 and restrict the operation of the slider member 640 are connected to the valve outer peripheral wall 820. Each of the valve restricting portions 840 includes a valve hook portion 850 that protrudes from the tip (upper side in FIG. 13A) toward the axis B and engages with the slider member 640.

  As shown in FIG. 13B, the valve restricting portion 840 is formed shorter than the valve side wall 820 in the direction of the axis B of the valve mechanism 530. The valve restricting portion 840 is provided to restrict the slider member 640 by the valve hook portion 850, whereas the valve side wall 820 prevents the displacement of the slider member 640 in the operation direction by the valve guide groove 830. The first spring member 630 is provided for housing. Therefore, the valve side wall 820 is formed longer and longer in the direction of the axis B of the valve mechanism 530 than the valve restricting portion 840.

  As shown in FIG. 13C, the valve bottom wall 810 corresponds to the valve guide groove 830 and the valve restricting portion 840 when viewed in the direction of the axis B of the valve mechanism 530 (the direction perpendicular to the paper in FIG. 13C). At the position, four ink flow paths 860 communicating with the valve bottom wall 810 in the vertical direction (FIG. 13C, the direction perpendicular to the paper surface) are formed. Further, the valve bottom wall 810 is provided with a valve receiving portion 870 that protrudes upward from the bottom surface thereof (FIG. 13 (c), front side in the direction perpendicular to the paper surface) and is a base that receives the spring upper portion 920 of the first spring member 630. . The valve receiving portion 870 is composed of two plate-like members arranged substantially in parallel on the bottom wall 810. Further, as shown in FIG. 13 (e), the height of the valve receiving portion 870 in the direction of the axis B is extremely low with respect to the valve outer peripheral portion 820. The valve receiving portion 870 is provided to prevent the first spring member 630 from coming into contact with the valve bottom wall 810 when the first spring member 630 is disposed in the space in the valve side wall 820. This is because if the first spring member 630 comes into contact with the valve bottom wall 810, the ink flow path is blocked and the ink does not flow. Therefore, the valve receiving portion 870 is provided to secure an ink flow path, and the first spring member 630 does not have to abut against the valve bottom wall 810, and thus is formed to a minimum height. ing.

  FIG. 14 is a diagram illustrating the first spring member 630, FIG. 14A is a diagram illustrating a side surface of the first spring member 630, and FIG. 14B is a diagram illustrating the first spring member 630. FIG. 14C is a diagram illustrating a bottom surface of the first spring member 630, and FIG. 14D is a cross-sectional view taken along line XIVd-XIVd in FIG. 14B. is there.

  The first spring member 630 is formed in a substantially hollow conical shape (or substantially bowl-shaped), and has a ring-shaped spring bottom 910 that forms the bottom surface (end of the larger diameter) of the first spring member 630, and A ring-shaped spring top 920 that is formed to have a diameter smaller than the diameter of the spring bottom 910 and forms the top of the upper surface of the spring member 630 (the end of the smaller diameter), and the spring top 920 and the spring bottom 910 In addition, the valve mechanism 530 is connected in the direction of the axis B of the valve mechanism 530 (the moving direction of the valve member 620 pressed by the ink extraction pipe 1720 and the urging direction of the first spring member 630 and the second spring member 650). It mainly includes a hollow conical spring flexible portion 930 that bends and deforms when a certain load is applied. The spring upper portion 920 is in contact with the valve receiving portion 870 of the valve member 620 and serves as a pressing portion that presses the valve member 620. Since the diameter of the spring bottom 910 is larger than the diameter of the spring top 920, the spring bottom 910 serves as a base when the spring flexible portion 930 is elastically deformed.

  As shown in FIG. 14D, the first spring member 630 includes a spring top 920 from the tip (the end surface on the right side in FIG. 14D) to the bottom surface of the spring bottom 910 (the end surface on the left side in FIG. 14D). A communicating ink channel 940 is formed. The ink flow path 940 includes an upper flow path 941 defined by the inner peripheral surface of the spring upper part 920, a flexible part flow path 942 defined by the inner peripheral surface of the spring flexible part 930, and an inner part of the spring bottom 910. The bottom channel 943 is defined by the peripheral surface. The opening area of the ink flow path 940 gradually increases from the tip of the spring top 920 toward the bottom of the spring bottom 910 as shown in FIG. Further, as shown in FIGS. 14B and 14C, the upper flow path 941 of the spring upper portion 920 is formed in a substantially rectangular shape when viewed in the direction perpendicular to the paper surface.

  Since the upper channel 941 has an opening surface formed in a substantially rectangular shape, the influence of bubbles contained in the ink can be reduced. For example, if the upper flow path 941 is formed in a substantially circular shape when viewed in the direction perpendicular to the plane of the paper, the air bubbles contained in the ink are spherical, so that the flow paths are blocked by bubbles that grow larger than the inner diameter of the upper flow path 941. It may be lost. When the substantially circular ink flow path is blocked by the spherical bubbles, the ink passage is lost and the ink cannot be normally fed into the inkjet printer 1710 (see FIG. 26). As a result, the quality of printing by the inkjet printer 1710 is degraded. However, in the first embodiment, by forming the opening surface of the upper flow path 941 in a substantially rectangular shape, even if bubbles that have grown greatly on the opening surface of the upper flow path 941 stay, the four corners are not blocked. The ink flow path is prevented from being blocked, and the deterioration of the printing quality is reduced.

  Note that the opening surface of the upper flow path 941 is not limited to a quadrangle, and may be formed in a polygonal shape such as a hexagon or a star.

  As shown in FIG. 14D, the spring upper portion 920 is formed in a relatively thick cylindrical shape extending in the direction of the axis B, and the direction of the axis B (the biasing direction of the first spring member 630). ) And the vertical cross-sectional shape are uniform. Similarly, the spring bottom 910 is also formed in a relatively thick cylindrical shape extending in the axis B direction, and has a uniform cross-sectional shape perpendicular to the axis B direction.

  Further, as shown in FIG. 14D, the spring flexible portion 930 is formed in a substantially conical shape inclined at a predetermined angle with respect to the axis B direction, whereby the spring bottom portion 910 and the spring upper portion are formed. Compared to 920, the strength against the load in the direction of the axis B is weaker. In addition, the spring flexible portion 930 is formed thinner than the spring bottom portion 910 and the spring top portion 920, so that the strength is weakened. Therefore, when the first spring member 930 is elastically deformed, the spring flexible portion 930 is bent and deformed.

  The second spring member 650 is formed in the same shape as the first spring member 630. The second spring member 650 includes a spring bottom portion 910, a spring top portion 920, a spring flexible portion 930, and an ink flow path 940. It consists of.

  15 is a view showing the slider member 640, FIG. 15A is a view showing the front and back of the slider member 640, and FIG. 15B is a view showing the left side of the slider member 640. FIG. 15C is a diagram showing the plane of the slider member 640, and FIG. 15D is a diagram showing the bottom surface of the slider member 640. FIG. (E) is sectional drawing in the XVe-XVe line | wire of FIG.15 (c).

  As shown in FIGS. 15A and 15B, the slider member 640 is formed of a resin material having a hardness higher than that of the first spring member 630 and the second spring member 650, and the outer periphery of the slider member 640. , A slider outer peripheral wall 1010 that forms an axis, two slider protrusions 1020 that extend along the slider outer peripheral wall 1010 in the direction of the axis B of the valve mechanism 530 and are symmetrically formed with respect to the axis B, and the slider A pair of sliders that are arranged on a straight line that is substantially orthogonal to the straight line connecting the protrusions 1020 and that are formed symmetrically with respect to the axis B and that are loosely inserted into the valve guide groove 830 (see FIG. 13) of the valve member 620. The loose insertion member 1030 is mainly provided. The slider outer peripheral wall 1010 has a substantially cylindrical shape together with the slider protrusion 1020.

  The slider protrusion 1020 is formed so that the height in the direction of the axis B is substantially equal to the height of the slider outer peripheral wall 1010. This is because the spring members 630 and 650 are respectively disposed in the internal spaces 1060 and 1070 on both sides of the slider member 640 in the axis B direction. Further, the movement of the spring members 630 and 650 in the direction orthogonal to the axis B is restricted by the slider protrusion 1020 and the slider outer peripheral wall 1010.

  The slider loose insertion member 1030 is formed to extend in the direction of the axis B of the slider member 640 (formed across the slider outer peripheral wall 1010 and the slider protrusion 1020). The slider loose insertion member 1030 and the valve guide groove 830 (see FIG. 13) allow the slider member 640 to move smoothly in the direction of the axis B and prevent the movement direction from shifting.

  As shown in FIGS. 15C and 15D, the spring members 630 and 650 are disposed inside the slider outer peripheral wall 1010 in contact with the spring bottoms 910 of the spring members 630 and 650. A slider pedestal 1040 is formed. The slider pedestal portion 1040 partitions the two spaces 1060 and 1070 in which the spring members 630 and 650 are accommodated in the slider member 640, respectively. A slider through hole 1050 is formed in the center of the slider base portion 1040. The slider through hole 1050 serves as a flow path for ink to flow. As shown in FIG. 15E, the slider pedestal portion 1040 is formed at a substantially intermediate position in the direction of the axis B of the slider member 640.

  16 is a view showing the valve seat member 660, FIG. 16 (a) is a view showing a side surface of the valve seat member 660, and FIG. 16 (b) is a plan view of the valve seat member 660. FIG. 16C is a view showing the bottom surface of the valve seat member 660, and FIG. 16D is a cross-sectional view taken along line XVId-XVId in FIG.

  As shown in FIG. 16 (a), the valve seat member 660 forms a bottom surface of the valve seat member 660, and contacts a spring top portion 920 of the second spring member 650, and a valve seat bottom portion thereof. The valve seat middle step portion 1120 formed with an outer diameter smaller than the outer diameter of 1110, and a valve seat receiving portion 1130 disposed on the upper surface of the valve seat middle step portion 1120 (upper side in FIG. 16A). ing. The valve seat receiving portion 1130 includes a valve seat inclined surface 1131 that is inclined downward toward the center of the valve seat member 660, and a check valve 670 described later is received by the valve seat inclined surface 1131.

  As shown in FIG. 16B, six valve seat receivers 1130 are formed at predetermined equal intervals in the circumferential direction of the valve seat member 660. Further, of the six valve seat receivers 1130, three valve seat receivers 1130 are formed with first valve seat through holes 1140 that penetrate the front and back of the valve seat member 660. The first valve seat through hole 1140 is formed in a portion other than the valve seat inclined surface 1131 of the valve seat receiving portion 1130 (a horizontal portion of the valve seat receiving portion 1130). Therefore, since the first valve seat through hole 1140 is formed in a portion different from the portion that receives the check valve 670, it is possible to prevent the ink flow path from being blocked.

  Further, a second valve seat through hole 1150 that penetrates the valve seat middle portion 1120 and the valve seat bottom portion 1110 is formed between the valve seat receiving portions 1130 of the valve seat member 660. Since the second valve seat through hole 1150 is formed between the valve seat receiving portions 1130, six second valve seat through holes 1150 are formed in the circumferential direction of the valve seat member 660. The second valve seat through hole 1150 serves as an ink flow path through which ink flows.

  As shown in FIG. 16C, a concave valve seat communication groove 1160 that communicates with each second valve seat through hole 1150 is formed on the bottom surface of the valve seat bottom portion 1110. The valve seat communication groove 1160 communicates the second valve seat through holes 1150 symmetrically formed with respect to the axis B in a substantially straight line. Therefore, three valve seat communication grooves 1160 that intersect at the axis B are formed in the valve seat bottom 1110.

  As shown in FIG. 16D, a gap is formed in the axial center B direction between the valve seat inclined surface 1131 of the valve seat receiving portion 1130 and the second valve seat through hole 1150. Therefore, even when the check valve 670 is supported by the valve seat inclined surface 1131, the ink flow path is secured. Further, since the end surface of the spring upper portion 920 of the second spring member 650 is positioned inside the second valve seat through hole 1150, the end surface of the spring upper portion 920 of the second spring member 650 contacts the valve seat communication groove 1160. However, an ink flow path is secured by the valve seat communication groove 1160.

  17 is a view showing the check valve 670, FIG. 17A is a view showing a side surface of the check valve 670, and FIG. 17B is a plan view and a bottom view of the check valve 670. FIG. 17C is a cross-sectional view taken along line XVIIc-XVIIc in FIG.

  The check valve 670 is formed in a substantially dish shape, and the check valve flat surface portion 1210 that forms the flat surface of the check valve 670 is configured to close the ink flow path by contacting the cover member 680. Yes. Further, the check valve bending portion 1220 that forms the curved surface of the check valve 670 is received by the valve seat receiving portion 1130 of the valve seat member 660. Therefore, when the check valve bending portion 1220 of the check valve 670 is received by the valve seat receiving portion 1130 of the valve seat member 660, the ink flow path is opened, and the check valve of the check valve 670 is checked. In a state where the flat surface portion 1210 is in contact with the cover member 680, the ink flow path is blocked.

  18 is a view showing the cover member 680, FIG. 18 (a) is a view showing the side surface of the cover member 680, and FIG. 18 (b) is a view showing the plane of the cover member 680. 18C is a view showing the bottom surface of the cover member 680, and FIG. 18D is a cross-sectional view taken along the line XVIIId-XVIIId in FIG. 18B.

  The cover member 680 is formed in a substantially cylindrical shape having an opening on the lower surface side. The cover member 680 includes a cover outer peripheral wall 1310 that forms the outer periphery thereof, and a cover upper portion 1320 that forms the upper surface of the cover member 680 (upper side in FIG. 18A), and the lower surface is open. In the cover member 680, the valve seat member 660 is fitted into an opening on the lower surface (lower side in FIG. 18A), and the check valve 670 is accommodated between the valve seat member 660 and the cover member 680. In other words, the cover member 680 and the valve seat member 660 constitute a case that houses the check valve 670.

  As shown in FIG. 18B or FIG. 18C, the cover upper portion 1320 is formed with six cover through holes 1330 penetrating the front and back of the cover member 1320 in the circumferential direction. The cover through hole 1330 becomes a flow path through which ink flows, and the check valve 670 contacts the cover upper portion 1320, thereby closing the cover through hole 1330 and closing the ink flow path.

  Next, a state where the ink cartridge 1 is assembled will be described with reference to FIG. 19 is a cross-sectional view of the ink cartridge 1, and is a cross-sectional view taken along line XIX-XIX in FIG. Note that the cross-sectional view of the ink cartridge 1 in FIG. 19 shows a state in which the ink I is stored in the frame 100.

  FIG. 19 shows a state where the ink cartridge 1 is assembled by welding the case 200 and the cap 300. In this state, the joint member 610 and the cap bottom wall 310 of the cap 300 are in contact with each other, and the outer peripheral wall of the ink supply unit 140 is fitted in the joint groove portion 740 of the joint member 610. Furthermore, the outer peripheral surface of the joint member 610 (joint outer peripheral portion 710 (see FIG. 12)) is in contact with the inner peripheral surface of the cap joint portion 360. Therefore, the internal space 1440 surrounded by the case 200 and the cap 300 is not in communication with the outside of the case 200 and the cap 300 and is substantially sealed.

  A pair of films 1430 are welded to the frame main body 110, and ink I is stored in a space (ink storage unit 120) that is substantially sealed by these films 1430. In addition, the welding process of the film 1430 will be described later.

  Here, the film 1430 will be described. The film 1430 is a two-layer film (hereinafter referred to as “nylon polyethylene”) made of a nylon film and a polyethylene film, and the side in contact with the frame main body 110 is a polyethylene film layer. This nylon polyethylene completely blocks the liquid but has a low gas barrier property. Therefore, a slight amount of gas can be transferred between the ink reservoir 120 and the internal space 1440 that are substantially sealed by the film 1430. . Therefore, since the gas existing in the ink I in the ink storage unit 120 gradually moves through the film 1430 to the internal space 1440, generation of bubbles in the ink I can be reduced. Therefore, it is possible to prevent the deterioration of the printing quality due to the bubbles in the ink I. The film 1430 may be made of any material as long as it can maintain strength and has a low gas barrier property. Examples thereof include a film in which a nylon film and a polypropylene film are formed in two layers, and a film formed by mixing nylon and polyethylene or nylon and polypropylene.

  In addition, as shown in FIG. 19, there is an ink flow path between the ink supply hole 122 and the cover member 680 of the frame 100, and the mortar in which the opening amount decreases from the cover member 680 toward the ink supply hole 122. In other words, an ink flow path 1410 having a hollow conical portion is formed. A hollow cylindrical portion connected to the minimum diameter side of the mortar-shaped portion is formed on the ink supply hole 122 side from the mortar-shaped portion of the ink flow channel 1410, and the mortar-shaped portion of the ink flow channel 1410 is formed. A hollow cylindrical part connected to the maximum diameter side of the mortar-like part is formed on the cover member 680 side from this part. A filter 1420 configured in a foam shape is disposed in the ink flow path 1410 in order to remove dust, foreign matter, and the like in the ink in the ink storage unit 120. That is, the ink flow path 1410 is a filter storage chamber that stores the filter 1420. The filter 1420 is configured in a cylindrical shape having the same diameter (the same cross-sectional shape) as the maximum diameter of the ink flow path 1410 (the diameter of the ink flow path 1410 in the vicinity of the sheet member 680), and the ink is supplied from the ink supply unit 140 side. By being inserted into the flow path 1410 (the direction parallel to the axis B direction of the valve mechanism 530 described above), the ink flows into the ink flow path 1410 in a compressed state. Therefore, a finer filter than before insertion can be obtained. Further, since the characteristics (foreign matter removal efficiency) of the filter 1410 can be adjusted by the compression rate, the reduction rate of the opening amount of the ink flow path 1410 (the shape of the inner surface of the inclined surface of the ink flow path 1410) is appropriately set. Therefore, desired filter characteristics can be obtained without changing the material of the filter 1420. In the first embodiment, the filter 1420 is made of a urethane material, but may be made of CFH40. If dust or foreign matter accumulates in the ink tube (not shown) of the valve mechanism 530 or the inkjet printer 1710 (see FIG. 26), the ink is not supplied accurately and the printing state deteriorates. Since dust and foreign matter can be removed by providing 1420, ink can be supplied accurately and deterioration of the printing state can be prevented.

  For example, when a flat mesh member is attached to or welded to the ink supply hole 122, the attachment process is required, or the frame main body 110 is manufactured in an attachable structure. The structure of the portion 110 becomes complicated and the manufacturing time of the ink cartridge 1 increases. However, since the attachment of the filter 1420 is completed simply by pushing the filter 1420 into the ink flow path 1410, the structure of the frame body 110 can be simplified and the manufacturing process can be simplified.

  Further, the filter 1420 inserted into the ink flow path 1410 is compressed in the insertion direction (a direction parallel to the axis B direction of the valve mechanism 530 described above) by restricting movement in the insertion direction by the ink supply hole 122. At the same time, since the inner surface of the ink flow path 1410 is compressed in the plane direction perpendicular to the insertion direction by the hollow conical inner surface, the ink channel 1410 is uniformly compressed in the three-dimensional direction. Therefore, since the filter 1410 is compressed uniformly as a whole, stable filter characteristics can be obtained.

  The ink supply hole 122 has the smallest inner diameter in the ink flow path 1410 and an inner diameter smaller than the diameter of the filter 1420, so that the filter 1420 pushed into the ink flow path 1410 enters more than necessary. Is stopped to prevent the ink storage unit 120 from dropping out, but a member that prevents the ink supply hole 122 from coming off may be provided in order to further prevent the ink from dropping out.

  As shown in FIG. 19, the ink flow path 1410 is connected to the ink storage section 120 on the opposite side (lower side in FIG. 19) and is continuous with the ink flow path 1410, and includes a valve seat member 660 and a cover member 680. A fitting portion 1450 to which the case is fitted is formed. The inner diameter of the fitting portion 1450 is sufficiently larger than the inner diameter of the ink flow path 1410 and slightly smaller than the outer diameter of the cover member 680, and the valve seat member 660 and the cover member 680 are fitted into the fitting portion 1450. Combined and fixed. Accordingly, the valve seat member 660 and the cover member 680 fixed to the fitting portion 1450 come into contact with the filter 1420 that is pressed into the ink flow path 1410 in a compressed state, and the filter 1420 comes out of the ink flow path 1410. Acts as a stopper to prevent.

  A valve mechanism insertion portion 1460 (inside the valve mechanism) is connected to the fitting portion 1450 on the opposite side (lower side in FIG. 19) of the fitting portion 1450 to the fitting portion 1450 and the valve mechanism 530 is inserted. The insertion portion 1460 includes a fitting portion 1450. The valve mechanism insertion part 1460 is also a flow path through which ink flows, and the ink is supplied to the ink supply part 140 by the space of the ink flow path 1410 and the fitting part 1450 and the space of the valve mechanism interior part 1460 described above. An ink flow path chamber is formed which serves as an ink supply path when the ink is supplied. And this ink flow path chamber is formed in the inside of the ink supply part 140 formed in the cylindrical shape, as FIG. 19 shows. The attachment of the valve mechanism 530 will be described later. In addition, as shown in FIG. 19, in the state where the valve mechanism 530 is inserted into the valve mechanism insertion portion 1460, the inclination angle of the cap through-hole 330 and the inclination angle of the inner peripheral flow path 761 of the joint member 610 are the same. Are formed identically. Further, the connecting surface between the inner peripheral channel 761 and the cap through-hole 330 is attached without a step. Therefore, the ink extraction tube 1720 (see FIG. 26) is smoothly inserted into the ink flow path 760 of the joint member 610.

  The valve mechanism 530 is disposed so that the bottom surface of the joint member 610 contacts the cap bottom wall 310, and the joint contact portion 730 of the joint member 610 can contact the valve bottom wall 810 of the valve member 620. The first spring member 630 is housed in the valve member 620 so that the valve receiving portion 870 of the valve member 620 and the spring upper portion 920 of the first spring member 630 are in contact with each other. Further, the first spring member 630 and the second spring member 650 are accommodated in the two spaces 1060 and 1070 partitioned by the slider pedestal portion 1040 of the slider member 640, respectively. When the state in which these are stored is described in detail, the first spring member 630 has a bottom surface 911 (see FIG. 14) of the spring bottom portion 910 that abuts against a surface 1041 (see FIG. 15) of the spring pedestal portion 1040 on the valve member 620 side. At the same time, the outer peripheral side surface 912 (see FIG. 14) of the spring bottom 910 is in contact with the inner wall 1042 (see FIG. 15) of the slider outer peripheral wall 1010. Similarly, the second spring member 650 is configured such that the bottom surface 911 of the spring bottom portion 910 abuts on the surface 1043 (see FIG. 15) on the side opposite to the valve member 620 (check valve 670 side) of the spring pedestal portion 1040 (see FIG. 15). The outer peripheral side surface 912 of 910 is in contact with the inner wall 1021 (see FIG. 15) of the slider protrusion 1020. Thus, the spring pedestal portion 1040 is a portion where the first spring member 630 and the second spring member 650 are engaged. And as FIG. 19 shows, the spring base part 1040 is the state clamped by the spring bottom part 910 of the 1st spring member 630 and the 2nd spring member. Further, the valve hook portion 850 of the valve member 620 that has entered from between the two slider protrusions 1020 comes into contact with the surface 1043 with which the bottom surface 911 of the spring bottom portion 910 of the second spring member 650 of the spring base portion 1040 contacts. Accordingly, the slider member 640 and the valve hook portion 850 are engaged with each other. The upper spring portion 920 of the second spring member 650 can come into contact with the valve seat bottom portion 1110 of the valve seat member 660. A check valve 670 is housed between the valve seat member 660 and the cover member 680. Details of the arrangement and operation of each member of the valve mechanism 530 will be described later.

  Next, a manufacturing process of the frame 100 will be described with reference to FIGS. FIG. 20 is a diagram for explaining a manufacturing process of the frame 100, and the manufacturing process shifts from FIG. 20 (a) to FIG. 20 (d). FIG. 21 is an enlarged cross-sectional view of the portion indicated by the arrow C in FIG. 20 and 21 schematically show the devices and members.

  First, the frame manufacturing apparatus 1510 used in the manufacturing process will be described. The frame manufacturing apparatus 1510 includes a base part 1520 for installing and supporting the frame main body part 110, a vacuum device 1530 for sucking the film 1430, a pressing part 1540 for pressing the film 1430 against the frame main body part 110, and a film 1430. And a welding device 1550 for welding to the frame main body 110.

  The base portion 1520 is formed with a concave base holding portion 1521 on which the frame main body portion 110 can be installed. The base holding portion 1521 is formed in a substantially rectangular shape corresponding to the outer shape of the frame main body portion 110. . Although not shown, the base holding portion 1521 has recesses corresponding to the ink dispensing unit 130 and the ink supply unit 140, and is positioned in a state where the frame main body unit 110 is installed. Further, in order to perform positioning, a clamp member that fixes the frame main body 110 from above (FIG. 20A, upper side) or from a side surface (FIG. 20A, left-right direction) may be provided.

  The vacuum device 1530 sucks and holds the film 1430. In the first embodiment, the vacuum device 1530 includes four vacuum devices 1530 (two vacuum devices 1530 on the front side in the vertical direction in FIG. 20). Has been. The vacuum device 1530 is disposed at positions corresponding to the four corners of the frame main body 110 and holds the film 1430 so as not to cause wrinkles.

  The pressing part 1540 includes a pressing elastic part 1541 whose tip part (lower side in FIG. 20A) is made of an elastic material. The pressing elastic part 1541 has a substantially spherical tip at a tip corresponding to the shape of the ink storage part 120 of the frame main body part 110. At the tip of the pressing elastic portion 1541, the inclination angle α of the frame inclined surface 124 (see FIG. 21) so that the pressing portion 1540 contacts the frame inclined surface 124 of the frame main body 110 in a state where the film 1430 is pressed. A pressing inclined surface 1542 corresponding to is formed. Therefore, no gap is formed between the frame inclined surface 124 of the frame main body 110 and the film 1430 in a state where the film 1430 is pressed by the pressing unit 1540. The pressing unit 1540 is provided with a float suppressing member 1543 that suppresses the lifting of the film 1430 in a state where the pressing unit 1540 presses the film 1430. The floating suppression member 1543 is attached to the outer periphery of the pressing elastic portion 1541 and suppresses the floating of the film 1430 around the frame protruding member 111.

  The welding device 1550 is a device for welding the film 1430 to the frame projection member 111 of the frame main body 110. The welding device 1550 is formed in a substantially columnar shape so as to cover the entire frame protruding member 111 of the frame main body 110 from above. Moreover, since the welding apparatus 1550 welds the film 1430 and the frame projection member 111 by heat welding, the tip portion (the end portion on the lower side of FIG. 20A) serves as a heat generating portion.

  Next, the process for welding the film 1430 to the frame body 110 will be described.

  In the welding step, the frame main body 110 is set in the base holding portion 1521 of the base portion 1520, and the film 1430 is sucked into the vacuum device 1530 (state shown in FIG. 20A). At this time, the film 1430 can be reliably welded to the frame body 110 by cutting the film 1430 larger than the outer shape of the frame body 110.

  In the state of FIG. 20A, for example, when a start switch (not shown) of the welding device 1510 is pressed, the vacuum device 1530 descends (state of FIG. 20B). As shown in FIG. 20B, the film 1430 and the frame projection member 111 are in contact with each other when the vacuum device 1530 is lowered.

  Thereafter, the pressing portion 1540 descends in the direction of the base portion 1520 (downward in FIG. 20C), and the pressing inclined surface 1542 of the pressing portion 1540 contacts the frame inclined surface 124 of the frame main body 110 via the film 1430 (FIG. 20 (c) state). At this time, the suction of the vacuum device 1530 is stopped at the timing (including before and after the actual contact) of the pressing portion 1540 with the film 1430, and the film 1430 can move. Thereby, the film 1430 is pushed by the pressing portion 1540 and moves in the center direction of the frame communication hole 123 of the frame main body portion 110.

  As shown in FIG. 20 (c), a part of the film 1430 passes through the frame communication hole 123, and the frame inclined surface 124 on the side that comes into contact with the pressing portion 1540 (FIG. 20 (c) upper frame inclined surface). 124) is pressed to the frame inclined surface 124 side opposite to the frame inclined surface 124 (the lower frame inclined surface 124 in FIG. 20C). By pressing the film 1430 beyond the center portion of the frame communication hole 123, the center portion of the film 1430 is slackened. By providing this slackness, when a small amount of ink is used (in an ink empty state), the pair of upper and lower films 1430 can be brought into close contact with each other, and the ink can be used up. In addition, the film 1430 may be deformed (for example, shrunk) due to an external influence, but the film 1430 can be prevented from being damaged by being loosened.

  Moreover, since the film 1430 is pressed by the pressing part 1540, there is no change in the thickness of the film 1430 itself. For example, if heat is applied to the entire film 1430 and welding is performed while the film 1430 is stretched, the film 1430 can be welded in a shape that follows the frame inclined surface 124. However, since the thickness of the film 1430 itself varies, Strength will be weakened. However, the film 1430 is pressed by the pressing portion 1540, the film is sandwiched between the pressing inclined surface 1543 and the frame inclined surface 124 having substantially the same inclination angle, and only the welding region outside the pressing portion 1540 is heated as will be described later. As a result, the thickness of the film 1430 is changed, and the thickness does not vary. Therefore, the strength of the film 1430 can be prevented from changing, and the film 1430 can be prevented from being damaged.

  Here, with reference to FIG. 21, the effect | action of the floating suppression member 1543 is demonstrated. The floating suppression member 1543 is provided to suppress the floating of the film 1430. For example, if the floating suppression member 1543 is not provided, the film 1430 is sandwiched between the pressing portion 1540 and the frame inclined surface 124, and thus may rise along the inclination angle α of the frame inclined surface 124. This is because the suction of the vacuum 1530 is stopped, but there is also a problem that the film 1430 cannot move smoothly unless the suction of the vacuum 1530 is stopped. Therefore, in the first embodiment, suction of the vacuum 1530 is stopped, and a floating suppression member 1543 is provided. If the film 1430 rises between the frame inclined surface 124 and the frame projecting member 111, the film 1430 may be slackened or the film 1430 and the frame projecting member 111 may not come into contact with each other. The film 1430 cannot be welded. However, in the first embodiment, by providing the float suppressing member 1543, it is possible to suppress the film 1430 from rising, and thus the film 1430 can be accurately welded.

  Returning to FIG. When the film 1430 is pressed by the pressing unit 1430, the welding device 1550 is lowered toward the frame projection member 111 (downward in FIG. 20D) of the frame main body 110, and the tip of the welding device 1550 is interposed through the film 1430. Then, the frame projection member 111 comes into contact with the tip (annular band region). Then, heat is transmitted from the welding device 1550, the frame projection member 111 is melted, and the region (annular welding region) in contact with the frame projection member 111 of the film 1430 is melted, so that they are thermally welded to each other (FIG. 20D). ) State). As described above, the film 1430 is composed of two layers of nylon and polyethylene, and the polyethylene film is disposed so as to contact the frame protrusion member 111. Further, in order to weld the film 1430 and the frame projection member 111, the frame body 110 is made of a resin material that is the same material as the polyethylene film. By configuring the film 1430 and the frame main body 110 in the same resin material, the film 1430 and the frame projection member 111 can be reliably welded. Nylon films are superior to polyethylene films in terms of strength, but have a high melting point and are inferior in welding workability. Therefore, in the present embodiment, the film 1430 has a two-layer structure made of nylon and polyethylene, so that the strength is ensured, and the polyethylene layer is used as a weld layer with the frame main body 110 at a low heating temperature. Welding workability is ensured by enabling welding. In addition, since the nylon layer does not melt during the welding operation, the change in the thickness of the film near the welded portion is reduced, and the strength of the film near the welded portion can be maintained.

  When the thermal welding is finished, the vacuum device 1530, the pressing unit 1540, and the welding device 1550 are raised and returned to the position shown in FIG. Thereafter, unnecessary portions of the film 1430 are cut as necessary. At this time, a cooling process for cooling the welded portion between the film 1430 and the frame projection member 111 may be performed.

  In the above welding process, after the pressing portion 1540 is lowered and the pressing inclined surface 1542 comes into contact with the frame inclined surface 124, suction of the vacuum device 1530 is stopped, and then the welding device 1550 is lowered and the film is moved. 1430 and the frame projection member 111 are thermally welded. However, when the amount of pressing of the film 1430 by the pressing inclined surface 1542 is small (when the volume of the ink storage unit 120 is small), the welding device 1550 is lowered and heat is applied. The suction of the vacuum device 1530 may be stopped after performing the welding.

  Here, the relationship between the film 1430 and the shape of the frame main body 110 will be described. In the frame main body 110 of the first embodiment, the shape of the frame reservoir 120 is formed in a substantially circular shape (see FIG. 7A). For example, if the shape of the frame storage unit 120 is a quadrangle, the wrinkles of the film 1430 will occur at the four apexes of the quadrangle. If the film 1430 is welded with wrinkles generated, ink remains in the wrinkles and the ink is used up. However, in the first embodiment, since the frame storage portion is formed in a substantially circular shape, it is difficult for wrinkles to be formed on the film 1430, and even if wrinkles are formed on the film 1430, the wrinkles are small wrinkles. . Therefore, the ink cartridge 1 of the first embodiment can improve the use up of ink. In addition, although the frame storage part 120 can reduce especially the generation | occurrence | production of the wrinkle of the film 1430 by forming in a substantially circular shape, it is good also as what forms in an ellipse, and even if it is a rectangle, a vertex part is sufficient. If it is formed with a smooth curve, it may be a quadrangle. That is, the shape is not limited as long as the formation of wrinkles can be reduced when the film 1430 is welded.

  Further, the film 1430 is welded to the frame main body 110 on both sides of the frame main body 110 (FIG. 20 (a), the film 1430 is welded to the lower side). Description is omitted.

  Next, a method for manufacturing the frame 100 will be described with reference to FIG. FIG. 22 is a diagram for explaining a method of manufacturing the frame 100. Note that the frame main body 110 shown in FIG. 22 has the film 1430 welded by the welding process.

  First, in manufacturing the frame 100, as shown in FIG. 22A, the valve mechanism 530 is attached to the ink supply unit 140 (valve mechanism insertion portion 1460 (see FIG. 19)) of the frame main body 110. In FIG. 22A, the valve mechanism 530 is already assembled. However, in the first embodiment, the joint member 610 is a single unit, and the valve member 620, the first spring member 630, the slider member 640, and the second spring member. The valve seat member 660, the check valve 670, and the cover member 680 are integrally formed. Below, the assembly | attachment process of the valve mechanism 530 of a 1st Example is demonstrated.

  First, the filter 1420 is press-fitted into the ink flow path 1410 (see FIG. 19). Then, a backflow prevention mechanism in which the cover member 680, the check valve 670, and the valve seat member 660 are assembled together is press-fitted into the fitting portion 1450 (see FIG. 19). As described above, since the fitting portion 1450 in the ink supply portion 140 is formed to have an inner diameter slightly smaller than the outer diameter of the cover member 680, the cover member 680, the check valve 670, and the valve seat member 660 are fitted. Fixed to the joint 1450. Thereafter, a unit composed of the valve member 620, the first spring member 630, the slider member 640, and the second spring member 650 assembled together is inserted into the valve mechanism insertion portion 1460, and finally the joint groove portion of the joint member 610. Assembling of the valve mechanism 530 is completed by fitting 740 to the ink supply unit 140. Accordingly, the valve member 620, the first spring member 630, the slider member 640, and the second spring member 650 are integrally configured before being inserted into the valve mechanism insertion portion 1460, and the valve seat member 660 is provided with a check. Since the valve 670 and the cover member 680 are integrally formed, the attachment process of the valve mechanism 530 can be simplified. As described above, the width of the joint groove portion 740 of the joint member 610 is slightly smaller than the thickness of the outer peripheral wall of the ink supply unit 140. Therefore, the valve mechanism 530 is attached with the valve mechanism 530 attached. It does not come off naturally.

  As shown in FIG. 22B, when the valve mechanism 530 is attached to the ink supply unit 140, ink is dispensed from the ink dispensing unit l30 by the ink dispensing needle 1610.

  In the state shown in FIG. 22B, the joint member 610 is fixed to the joint supply unit 140 by fitting the joint groove 740 to the end of the ink supply unit 140, and thus the valve member of the valve mechanism 530. Along with 620, the ink supply flow path of the ink supply unit 140 is completely closed. Therefore, the dispensed ink does not leak from the ink supply unit 140. Thereafter, as shown in FIG. 22C, when ink is dispensed by the ink dispensing needle 1610, the ink dispensing plug 520 is press-fitted into the ink dispensing unit 130.

  As shown in FIG. 25 (a), the ink dispensing plug 520 is made of an elastic material and is formed in a conical shape with a press-fitting tip tapered in accordance with the inner surface shape of the ink dispensing part 130. Yes. Then, the ink dispensing plug 520 is not press-fitted to the back of the ink dispensing unit 130 and is press-fitted to a position where the rear end surface is located in the vicinity of the opening end surface of the ink dispensing unit 130.

  As a result, a space X communicating with the ink reservoir 120 through the ink dispensing hole 121 is formed in the back of the ink dispensing unit 130. In this state, ink is dispensed by penetrating the ink dispensing plug 520 so that the tip of the ink dispensing needle 1610 is positioned in the space X.

  When the ink is dispensed and an amount of ink corresponding to the maximum holding capacity of the ink storage unit 120 is injected, the pair of films 1430 are attached to the frame collar portion of the frame main body 110 as shown in FIG. It will be in the state swelled so that it may protrude outward from the surface of 112. However, as described above, the case side wall 230 of the case 200 is formed with the case bending portion 240 that curves outward, so that the film 1430 that bulges outward and the inner surface of the case 200 are formed. It is designed not to touch.

  In the present embodiment, the reason that the ink dispensing unit 130 is provided and the ink is dispensed therefrom is that the backflow prevention mechanism having the check valve 670 is installed in the ink supply unit 140. is doing. The backflow prevention mechanism is provided so that the ink once supplied to the recording apparatus does not flow back to the ink cartridge 1 in a state in which the ink cartridge 1 is mounted on the recording apparatus. It can no longer be noted. Therefore, an ink dispensing unit 130 dedicated to dispensing is provided, and ink is dispensed therefrom.

  Next, a manufacturing process until the ink cartridge 1 is manufactured will be described with reference to FIG. FIG. 23 is a diagram for explaining a manufacturing process of the ink cartridge 1.

  As shown in FIG. 23A, the frame 100 is attached to the cap 300 so that the frame loose insertion member 141 of the ink supply unit 140 is loosely inserted into the cap guide groove 361 and the pair of frame restricting portions. The mounting is performed so that 150 is positioned between the pair of cap regulating members 370 and abuts against them. The attachment of the frame 100 is completed when the frame joint 142 is engaged with the cap joint hole 362. As described with reference to FIG. 6, it is possible to prevent the frame 100 from being easily detached by joining the frame joining portion 142 and the cap joining hole 362, and to rotate the frame 100 by the frame restricting portion 150 and the cap restricting member 370. Therefore, the frame 100 and the cap 300 can be attached without play. That is, the frame 100 and the cap 300 are connected by mechanical engagement between the frame joint portion 142 and the cap joint hole 362, omitting the fixing work by an adhesive, welding, or the like. On the other hand, although it is easy to produce the rotation shift centering on the cylindrical cap joint part 360, since the rotation of the frame 100 is restricted by the frame restricting part 150 and the cap restricting member 370, the assembly work is simplified. The prevention of the rotational deviation of the frame 100 is achieved together.

  In addition, since the ink supply unit 140 and the cap 300 are connected via the joint member 610, external vibration transmitted to the cap 300 is not transmitted directly to the frame 100 but is attenuated by the joint member 610. ing.

  In the state where the frame 100 shown in FIG. 23B is attached to the cap 300, the joint member 610 is interposed between the tip of the ink supply unit 140 and the cap bottom wall 310 of the cap 300. Thus, the joint member 610 is clamped. That is, the cap 300 acts as a pressing member that presses and fixes the joint member 610 to the ink supply unit 140, and the joint member 610 is more firmly fixed to the ink supply unit 140. . Therefore, although ink has already been dispensed, the frame 100 is attached to the cap 300 and the joint member 610 is supplied with ink in order to reliably avoid leakage of ink from the ink supply unit 140 after dispensing. The ink dispensing operation shown in FIGS. 22B and 22C may be performed after being firmly fixed to the portion.

  As shown in FIG. 23B, the case 200 is attached so as to cover the frame 100 in a state where the frame 100 and the cap 300 are attached. In this state, the cap protrusion member 350 abuts on a step formed by the first opening end surface 211 (see FIG. 4) and the second opening end surface 212 (see FIG. 4) of the case 200 (see FIG. 24A). ).

  As shown in FIG. 23 (c), with the cap 300 and the case 200 attached, the cap protrusion member 350 and the cap protruding from the cap bottom wall 310 side of the cap 300 by, for example, an ultrasonic welding device (not shown). Case 200 (stepped surface formed by first opening end surface 211 and second opening end surface 212) is welded. The dotted line in FIG. 23C corresponds to the position where the cap protrusion member 350 is formed, and the portion indicated by the dotted line is ultrasonically welded.

  Here, with reference to FIG. 24, the welding process of case 200 and cap 300 is demonstrated. 24 is an enlarged cross-sectional view showing a welded portion between the case 200 and the cap 300, FIG. 24 (a) shows a state before welding, and FIG. 24 (b) shows a state after welding. Indicates the state.

  In FIG. 24A, the cap protrusion member 350 of the cap 300, the step formed by the first opening end surface 211 and the second opening end surface 212 of the case 200 so that a part of the end surface is lost contacted. Indicates the state. At this time, a slight gap is formed between the cap side wall 320 of the cap 300 and the case side wall 230. In this state, ultrasonic waves are locally applied to the position corresponding to the cap protrusion member 350 from the cap bottom wall 310 side of the cap 300. Since ultrasonic welding is a known technique, a detailed description thereof will be omitted.

  As shown in FIG. 24B, when the case 200 and the cap 300 are welded by ultrasonic welding, the cap projection member 350 and the case opening 210 of the case 200 are melted and welded to each other. Then, the first opening end surface 211 and the second opening end surface 212 are not melted, and the melted portions of the cap projection member 350, the first opening end surface 211, and the second opening end surface 212 are melted residue X (burrs). It collects in the gap between the case side wall 230 and the cap side wall 320. As described above, by providing the gap between the cap side wall 320 and the case side wall 230 in which the molten debris X accumulates, the molten debris X is not exposed to the outside and the appearance of the ink cartridge 1 is prevented from being impaired. Can do.

  Further, since the case 200 and the cap 300 are positioned by the step formed by the first opening end surface 211 and the second opening end surface 212 and the cap protrusion member 350, a gap between the cap side wall 320 and the case side wall 230 is obtained. Can be made substantially uniform over the entire circumference of the cap 300, and the molten residue X can be reliably accumulated in the gap.

  In addition, a slope may be formed instead of the step of the case side wall 230, and the corner of the cap projection member 350 may be brought into contact with the slope.

  Here, with reference to FIG. 25, the operation of the ink dispensing plug 520 when the case 200 is attached to the cap 300 will be described. FIG. 25 is a diagram for explaining the operation when the ink dispensing plug 520 is attached.

  As shown in FIG. 25A, the inside of the ink dispensing part 130 is an ink injection path, and the ink injection path is defined by a dispensing inner peripheral part 131. The inner part 131 of the dispensing is formed in a hollow conical shape at the back (the lower side in FIG. 25A) side from the ink dispensing hole 121. This is because the ink reservoir 120 is defined by the frame inclined surface 124, so that the inner portion of the dispensing inner peripheral portion 131 has a shape that follows the frame inclined surface 124. Further, the ink dispensing plug 520 is formed in a conical shape having a tapered tip so as to match the shape of the dispensing inner peripheral portion 131. In a state where the frame 100 is manufactured and ink dispensing is completed, the upper end surface (the upper end surface in FIG. 25A) of the ink dispensing plug 520 is the outer end surface of the ink dispensing unit 130 (FIG. 25 ( a) Upper end surface) is arranged at substantially the same position, and is not press-fitted to the ink dispensing unit 130. As described above, this is to secure the space X communicating with the ink dispensing hole 121 for dispensing ink in the back of the ink dispensing unit 130. (When the ink dispensing plug 520 is press-fitted to the back of the ink dispensing unit 130, the space X communicating with the ink dispensing hole 121 is not secured, so that ink cannot be dispensed by the ink dispensing needle 1610. As a result, when ink is dispensed, the ink I may remain in the hollow conical space X at the back of the dispensing inner periphery 131.

  As shown in FIG. 25 (b), when the case 200 is attached to the cap 300, when the case 200 is pushed toward the cap 300 (the state shown in FIG. 23 (b)), the case protrusion member 260 and the ink dispensing plug are placed. 520 contacts the case 520, and the ink dispensing plug 520 is pushed by the case protrusion member 260. At this time, the ink remaining in the dispensing inner periphery 131 is pushed by the ink dispensing plug 520, and as a result, the ink flows from the ink dispensing hole 121 into the ink reservoir 120 (see FIG. 19).

  As shown in FIG. 25 (c), in the state where the case 200 and the cap 300 are welded, the ink dispensing plug 520 fills the space X of the collar portion in the dispensing inner peripheral portion 131. Therefore, since no ink remains in the dispensing inner peripheral portion 131, the ink I can be dispensed without waste. Further, the ink dispensing plug 520 is pressed by the case protrusion member 260. By pressing the ink dispensing plug 520 by the case protrusion member 260, the frame 100 is less likely to be loose in the case 200.

  In addition, the frame 100 is connected to the case 200 at two points of the ink supply unit 140 and the ink dispensing unit 130 and is supported in a floating state in the space in the case 200, but is elastic on the ink supply unit 140 side. It is connected via a joint member 610 made of material, and is connected via an ink dispensing plug 520 made of an elastic material on the ink dispensing part 130 side, so that it is supported in a damping state in the space in the case 200. ing. Therefore, even if an impact is applied to the case 200, the vibration is attenuated by the elastic material and transmitted to the frame 100, so that the influence of the external impact on the frame 100 can be reduced. Thus, the joint member 610 and the ink dispensing plug 520 also function as a damper that makes it difficult to transmit the vibration applied to the case 200 to the frame 100, so compared to the case where a dedicated damper member is provided, The number of parts has been reduced. In addition, since the case protrusion member 260 presses the ink dispensing plug 520, the case dispensing member 260 also acts as a stopper for the ink dispensing plug 520. The ink dispensing plug 520 was pushed into the interior of the ink dispensing unit 130 by the case projection member 260 when the case 200 and the cap 300 were welded, but immediately after the ink was dispensed, the ink dispensing plug 520 was used. May be pushed to the back of the ink dispensing unit 130.

  As described above, the ink cartridge 1 is manufactured by dispensing the ink I to the frame storage portion 120 of the frame 100, and then covering the case 100 with the frame 100 and welding the case 200 and the cap 300. Done. Some conventional ink cartridges dispense ink from outside the case after the case is put on the frame. In this conventional ink cartridge, it is necessary to prepare a frame and a case according to the amount of ink stored and the ink color. However, in the first embodiment, since the case is put on after the ink is dispensed into the frame storage portion 120 of the frame 100, the frame 100 can be made into a common component. That is, even when the case has a different shape, the frame 100 can be used in common. As a result, the manufacturing cost of the ink cartridge 1 can be reduced.

  In addition, the ink cartridge 1 completed by the above steps is completely hidden so that the ink dispensing unit 130 and the ink dispensing plug 520 are not visible from the outside by the case 200. The trouble of removing the dispensing plug 520 and scattering the ink to the outside is less likely to occur.

  Next, with reference to FIG. 26, attachment of the ink cartridge 1 to the ink jet printer 1710 will be described. FIG. 26 is a cross-sectional view for explaining the process of mounting the ink cartridge 1 to the ink jet printer 1710. FIG. 26 (a) shows the state before the ink cartridge 1 is mounted, and FIG. It shows after the ink cartridge 1 is mounted. Note that the ink cartridge 1 in FIG. 26 is schematically shown, and therefore, the case 200 and the cap 300 are indicated by a solid line, and the frame 100 is indicated by a broken line.

  As shown in FIG. 26A, the ink cartridge 1 of the ink jet printer 1710 is attached to the attachment portion of the valve mechanism 530 inside the ink cartridge 1 from the cap through hole 330 into the joint member 610 (see FIG. 19). A hollow ink extraction tube 1720 that is inserted and extracts the ink I from the ink cartridge 1 is provided. The ink extraction tube 1720 communicates with a head (not shown) of the ink jet printer 1710 through a flow path (not shown). The ink extraction tube 1720 is formed so as to protrude from the mounting portion of the ink jet printer 1710 (projecting upward in FIG. 26A), and a concave ink extraction groove 1730 is formed at the tip (upper side in FIG. 26A). Has been. The ink extraction groove 1730 ensures an ink flow path even if the ink extraction tube 1720 contacts the bottom surface of the valve member 620 (see FIG. 19) of the valve mechanism 530.

  As shown in FIG. 26A, the mounting portion of the ink jet printer 1710 includes a pair of clamp members 1740 that protrude from the mounting portion (projecting upward in FIG. 26A) with the ink extraction tube 1720 interposed therebetween. It has been. A clamp engagement portion 1750 that protrudes in a direction facing each other and engages with the cap side wall 320 is formed at the distal end of the clamp member 1740 (the upper end portion in FIG. 26A). The clamp member 1740 is flexible in the direction away from each other (the direction of arrow D in FIG. 26). When the ink cartridge 1 is mounted, the clamp member 1740 is pushed by the cap bottom wall 310 in the direction of arrow D. To be flexible. The direction of mounting the ink cartridge 1 to the ink jet printer 1710 is determined from the positional relationship between the ink extraction tube 1720 and the cap through-hole 330.

  As shown in FIG. 26B, when the ink cartridge 1 is mounted on the mounting portion of the ink jet printer 1710, the clamp engaging portion 1750 of the clamp member 1740 is engaged with the end of the cap side wall 320 of the cap 300. It is fixed. When the ink cartridge 1 is removed, the engagement between one of the clamp engaging portions 1750 and the cap side wall 320 can be performed by swinging the clamp member 1740 in the arrow D direction.

  As described above, the cap side wall 320 is provided in order to make the molten residue X (see FIG. 24) generated in the welding process of the case 200 and the cap 300 invisible from the outside. Further, the cap side wall 320 also functions as an engaging portion for mounting and fixing the ink cartridge 1 to the ink jet printer 1710. Therefore, since a new engaging portion that engages with the clamp member 1740 is not required, the structure of the ink cartridge 1 can be prevented from becoming complicated and the cost can be reduced.

  Next, the operation of the valve mechanism 530 when the ink extraction tube 1720 is inserted into the valve mechanism 530 will be described with reference to FIG. FIG. 27 is a view showing the operation of the valve mechanism 530. 27A shows a state before the ink extraction tube 1720 is inserted, and FIG. 27B shows a state in which the ink extraction tube 1720 is being inserted, and FIG. c) shows a state in which the ink extraction tube 1720 is inserted and the ink cartridge 1 is completely attached to the ink jet printer 1710 (see FIG. 26).

  FIG. 27A shows a state before the ink cartridge 1 is mounted on the ink jet printer 1710. At this time, the valve member 620 is urged by the first spring member 630 and the second spring member 650 so as to be in contact with the joint member 610 in parallel with the axis B. As shown in FIG. 27A, the first spring member 630 housed in the valve member 620 (and the slider member 640) has a slightly bent spring flexible portion 930. On the other hand, no bending occurs in the spring flexible portion 930 of the second spring member 650 disposed on the upper portion of the slider member 640 (upper side in FIG. 27A). This is for determining the order in which the spring members 630 and 650 are bent. That is, since the first spring member 630 in which the spring flexible portion 930 is bent is easier to bend than the second spring member 650, when the ink extraction tube 1720 is inserted, the first spring member 630 is first moved. Then, the second spring member 650 is configured to bend.

  The bending of the spring flexible portion 930 of the first spring member 630 is formed by the valve hook portion 850 of the valve member 620 engaging the surface 1043 of the spring base portion 1040 of the slider member 640. A distance a (see FIG. 27A) between the inner end surface of the valve bottom wall 810 of the valve member 620 and the end surface of the valve hook portion 850 on the valve bottom wall 810 side is the distance of the slider pedestal portion 1040 of the slider member 640. Since the thickness is shorter than the total distance of the height of the first spring member 930 in the vertical direction and the height of the valve protrusion 750, when the valve hook portion 850 of the valve member 620 is engaged with the surface 1043 of the slider member 640. The spring flexible portion 930 of the first spring member 630 is bent. Here, the height in the axis B direction of the valve mechanism 530 has a dimensional error at the time of production for each part. Therefore, the dimensional error is more likely to occur as the number of parts increases. However, since the slider member 640 is in contact with the valve hook portion 850 of the valve member 610, at least the dimensional error of the first spring member 630 is irrelevant. Therefore, the dimensional error of the valve mechanism 530 is reduced, and the expansion / contraction operation of the valve mechanism 530 is stabilized.

  Further, as shown in FIG. 27A, the inner diameter of the valve side wall 820 of the valve member 620 and the outer diameter of the slider outer peripheral wall 1010 of the slider member 640 are formed to be substantially equal. Therefore, when the slider member 640 moves in the direction of the axis B of the valve mechanism 530, it is possible to prevent the shift in the moving direction. Further, the inner diameter of the slider outer peripheral wall 1010 and the outer diameter of the spring bottom 910 of each spring member 630, 650 are formed to be substantially equal. Therefore, it is possible to reduce the displacement of the spring members 630 and 650 in the direction perpendicular to the axis B (left and right direction in FIG. 27A) in a state where the spring members 630 and 650 are disposed on the slider base portion 1040 of the slider member 640. it can. Further, the outer shape of the valve side wall 820 of the valve member 620 is formed substantially equal to the inner diameter of the ink supply unit 140. Therefore, it is possible to prevent a shift in the moving direction when the valve member 620 operates in the direction of the axis B. Accordingly, the expansion and contraction operation of the valve mechanism 530 in the direction of the axis B is stabilized.

  As shown in FIG. 27B, when the ink extraction tube 1720 is inserted into the joint member 610 and enters the valve mechanism insertion portion 1460 of the ink supply portion 140, it contacts the valve bottom wall 810 of the valve member 620. Thus, the valve member 620 moves in the direction of the valve seat member 660 (upward in FIG. 27B). Along with this movement, the first spring member 630 is flexibly deformed so as to compress. However, when the amount of intrusion of the ink extraction tube 1720 is small, only the first spring member 630 is moved by the amount of movement of the valve member 620. Due to the flexible deformation, the slider member 640 does not move, and the valve hook portion 850 of the valve member 620 and the slider base portion 1040 of the slider member 640 are separated from each other.

  When the ink extraction tube 1720 further enters, the valve member 620 further moves in the direction of the valve seat member 660. Accordingly, the slider member 640 moves in the direction of the valve seat member 660 (the direction opposite to the urging direction of the first spring member 630 and the second spring member 650), and the flexible deformation of the second spring member 650 is started. .

  As shown in FIG. 27C, when the ink cartridge 1 is attached to the attachment portion of the ink jet printer 1720, the second spring member 650 is also elastically deformed to form an ink flow path indicated by an arrow E. . The ink flow path indicated by the arrow E includes the ink reservoir 120 (see FIG. 19), the ink supply hole 122 (see FIG. 19), the filter 1420 (see FIG. 19) in the ink flow path 1410, and the cover member 680 penetrating the cover. Hole 1330, first valve seat through hole 1140 and second valve seat through hole 1150, valve seat communication groove 1160, ink flow path 940 of second spring member 650, slider through hole 1050, ink flow path of first spring member 930 940, a flow path formed between the first spring member 930 and the valve receiving portion 870, an ink flow path 860 of the valve member 620, an ink extraction groove 1730 of the ink extraction pipe 1720, and the inside of the ink extraction pipe 1720 in order. This flow path is a main flow path through which most of the ink flows. The space between the valve side wall 820 of the valve member 620 and the inner peripheral surface of the valve mechanism insertion portion 1460 also serves as an ink flow path.

  In the main flow path, the upper flow path 941 formed in the spring upper part 920 of the first spring member 630 and the upper flow path 941 formed in the spring upper part 920 of the second spring member 650 are disconnected. The area is the smallest, and the flow path is most easily blocked by the retention of bubbles contained in the ink. However, as described above, since the opening of the upper flow path 941 is formed in a substantially rectangular shape, such a problem is avoided.

  Here, with reference to FIG. 28, the operation of the joint member 610 when the ink extraction tube 1720 is inserted into the joint member 610 will be described. FIG. 28 is a diagram for explaining the operation of the joint member 610. FIG. 28A shows a state before the ink extraction tube 1720 is inserted, and FIG. 28B shows the ink extraction tube 1720. Shows a state where is inserted.

  As shown in FIG. 28A, in a state before the ink extraction tube 1720 is inserted, the joint protrusion 750 protrudes in a substantially horizontal direction (a direction orthogonal to the axis B), and the step surface 732 is substantially horizontal. It has become. In addition, the diameter of the front-end | tip part 734 of the joint contact part 730 is shown by b.

  As shown in FIG. 28B, when the ink extraction tube 1720 is press-fitted into the protrusion channel 762 from the opening 722 through the taper channel 761, the joint protrusion 750 has the inner peripheral surface 751 and the ink. Due to friction with the outer peripheral surface of the extraction tube 1720, the ink extraction tube 1720 is dragged and displaced in the insertion direction of the ink extraction tube 1720 (upward in FIG. 28B) (displaced in the support portion flow path 762). At this time, the joint contact portion 730 has a structure in which the joint peripheral portion 730 is notched in a staggered shape by the inner peripheral surface 733 and the stepped surface 732, so that the joint protruding portion 750 in the insertion direction of the ink extraction tube 1720. The displacement is not transmitted directly to the tip 734 of the joint contact portion 730. Therefore, as shown in FIG. 28B, the tip end portion 734 of the joint contact portion 730 is hardly displaced in the insertion direction, and the tip end portion 734 of the joint contact portion 730 is away from the ink extraction tube 1720 ( It is slightly displaced in the direction of arrow F). The diameter of the joint contact portion 730 in this state is indicated by b1, and is slightly larger than the diameter b in FIG. That is, the change in the shape of the joint member 610 accompanying the insertion of the ink extraction tube 1720 is a change in the shape that displaces the joint contact portion 730 in the arrow F direction. Temporarily, there is no step surface 732 at the boundary between the joint contact portion 730 and the joint projection portion 750, and the joint contact portion 730 is directed from the inner peripheral surface 751 of the joint projection portion 750 toward the distal end portion 734 of the joint contact portion 730. If the joint protrusion 750 is deformed so as to be displaced in the insertion direction of the ink extraction tube 1720 as the ink extraction tube 1720 is inserted, the joint contact portion 730 has a shape with a gentle slope. The deformation of the joint protrusion 750 is directly transmitted and is displaced in the insertion direction together with the joint protrusion 750. As a result, the insertion stroke of the ink extraction tube 1720 for forming the ink flow path between the valve member 620 (see FIG. 27) and the joint contact portion 730 becomes long. Therefore, the ink extraction tube 1720 must be formed long. In addition, when the ink extraction tube 1720 is long, it is liable to break due to contact with other members. However, in the first embodiment, the joint contact portion 730 is displaced in a direction (arrow F direction) substantially orthogonal to the insertion direction of the ink extraction tube 1720, so that the stroke for forming the ink flow path needs to be lengthened. There is no. Accordingly, the ink extraction tube 1720 can be prevented from coming into contact with other members, and damage can be reduced.

  Here, with reference to FIG. 29, a tactile feeling associated with the mounting of the ink cartridge 1 will be described. FIG. 29 is a graph showing a tactile feeling when the ink cartridge 1 is mounted. The horizontal axis in FIG. 29 is a moving distance (stroke) when the ink cartridge 1 is mounted, and the vertical axis in FIG. 29 is a load generated when the ink cartridge 1 is mounted.

  As shown in FIG. 29, when the ink cartridge 1 is started to be mounted and the ink extraction tube 1720 comes into contact with the valve member 620, the load increases rapidly. Thereafter, when the spring flexible portion 930 of the first spring member 630 starts elastic deformation, the load is suddenly reduced. This change in the state is point c in FIG. 29 (a state intermediate between FIG. 27A and FIG. 27B).

  Thereafter, when the mounting of the ink cartridge 1 is continued, the elastic deformation of the first spring member 630 is finished, and the elastic deformation of the second spring member 650 is started. At this time, the load rapidly increases again. This state is point d in FIG.

  Thus, by providing each spring member 630, 650, there is a two-stage load change. Therefore, the wearer of the ink cartridge 1 can feel that the ink cartridge 1 is correctly mounted. This change in load is called tactile feeling. Therefore, it is possible to confirm the tactile feeling without visually confirming whether or not the ink cartridge 1 is correctly mounted.

  Note that the load similarly changes when the ink cartridge 1 is attached / detached, and this change is shown by the curve at the time of attachment / detachment shown in FIG. When the ink cartridge 1 is detached, the spring member 630, 650 has an elastic force to return to its original state at the beginning of the removal, so that the load is high, but when the ink cartridge 1 is continuously removed, The change in load becomes smooth.

  Next, the inclination angle α (see FIG. 21) of the frame inclined surface 124 of the frame main body 110 will be described with reference to FIG. FIG. 30 is a graph showing the relationship between the inclination angle α of the frame inclined surface 124, the ink remaining amount, and the storage volume. 30 represents the inclination angle α of the frame inclined surface 124, and the vertical axis in FIG. 30 (vertical direction in FIG. 30) represents the remaining amount of ink (vertical on the left side in FIG. 30). Axis) and storage volume (vertical axis on the right side of FIG. 30). Further, the black circles in FIG. 30 indicate the remaining amount of ink, and the black squares indicate the accommodation volume.

  In the first embodiment, the frame inclined surface 124 is formed in a straight line shape in cross section as shown in FIG. This is to reduce the amount of ink remaining in the ink reservoir 120 and improve the use of ink. In other words, if the frame inclined surface 124 is formed in a curved shape in cross-sectional view, the film 1430 cannot accurately follow the frame inclined surface 124 when the ink storage amount is reduced. This is because a slight gap remains between the film and the film 1430, and ink remains there.

  Further, the frame inclination angle α of the frame inclined surface 124 is set to an angle that secures a large amount of ink and reduces the remaining amount of ink, and is formed to be 30 ° in this embodiment. Yes. The ink cartridge 1 has a minimum required storage volume. The accommodation volume is 23 milliliters (hereinafter abbreviated as “ml”), and is a straight line f1 indicated by a broken line in FIG. As shown in FIG. 30, it is preferable that the inclination angle α of the frame inclined surface 124 is set to 27 ° or more from the minimum required storage volume.

  Further, a target value of the maximum remaining amount is determined as the remaining amount of ink, and the target value is 1.5 ml or less. This target value is a straight line f2 indicated by a broken line in FIG. 30, and the inclination angle α of the frame inclined surface 124 is preferably set to 34 ° or less from the remaining amount of ink.

  As shown in FIG. 30, the accommodation volume increases proportionally as the angle of inclination α increases, but the remaining amount of ink increases rapidly when the value of the inclination angle α exceeds 30 °. . From this experimental result, it is understood that it is optimal to set the inclination angle α of the frame inclined surface 124 to 30 °.

  Note that the inclination angle α is preferably 27 ° or more from the accommodation volume, but when the ink remaining amount is taken into consideration, the inclination angle α is preferably formed in the range e of 28 ° to 34 °. As long as it is within this range, it may be formed at any inclination angle α.

  In the first embodiment, the frame 100, the case 200, and the cap 300 are not only made of a resin material, but the valve mechanism 530 is also made of a resin material. Is not used. Therefore, the ink cartridge 1 can be disposed of by incineration. For example, when the urging member of the valve mechanism 530 (in the first embodiment, each of the spring members 630 and 650 corresponds) is an ink cartridge made of metal, the ink cartridge is disassembled at the time of disposal. The biasing member must be removed. Therefore, disposal costs are incurred. However, in the first embodiment, since all the components of the ink cartridge 1 are flammable, the cost of disposal can be reduced.

  Next, the ink cartridge 2 of the second embodiment will be described with reference to FIG. In the first example, the shape of the tip of the ink dispensing plug 520 (see FIG. 19) was formed in a substantially conical shape. In contrast, in the second embodiment, the dispensing inner peripheral portion 1830 of the ink dispensing portion 1820 of the frame 1810 is formed by a substantially hollow cylindrical groove and is press-fitted into the dispensing inner peripheral portion 1830. The ink dispensing plug 1840 is formed in a substantially cylindrical shape. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 1 of 1st Example, and the description is abbreviate | omitted.

  FIG. 31 is a cross-sectional view of the ink cartridge 2 of the second embodiment. As shown in FIG. 31, in the ink cartridge 2 of the second embodiment, the shape of the dispensing inner peripheral portion 1830 of the ink dispensing portion 1820 of the frame 1810 is formed in a substantially hollow cylindrical groove. The ink dispensing hole 121 communicates with an end portion (lower side in FIG. 31) facing the opening portion (upper side in FIG. 31) of the dispensing inner peripheral portion 1830. The ink dispensing plug 1840 that is press-fitted into the dispensing inner peripheral portion 1830 is formed in a substantially cylindrical shape. Therefore, when the case 200 is attached to the cap 300 and the ink dispensing plug 1840 is pushed by the case protrusion member 260, the outer surface of the ink dispensing plug 1840 and the inner surface of the dispensing inner peripheral portion 1830 abut against each other without any gap. That is, the communication between the dispensing inner peripheral portion 1830 and the ink dispensing hole 121 is blocked by the ink dispensing plug 1840.

  Therefore, similarly to the first embodiment, when the case 200 is attached to the cap 300, the ink dispensing plug 1840 is pushed by the case protrusion member 260, so that the manufacturing process of the ink cartridge 2 can be simplified. In addition, the backlash of the frame 1810 can be reduced by pressing the ink dispensing plug 1840 with the case protrusion member 260. As in the first embodiment, even if an impact is applied to the case 200, the case 18 is relaxed and transmitted to the frame 1810, so that the frame 1810 can be protected from an external impact. Furthermore, since the case protrusion member 260 presses the ink dispensing plug 1840, it also acts as a stopper for the ink dispensing plug 1840.

  Further, as shown in FIG. 31, in the ink dispensing plug 1840, the portion that contacts the case protrusion member 260 becomes a dispensing plug groove 1850, and the dispensing plug groove 1850 is a concave groove, and the diameter of the groove is The diameter of the case protrusion member 260 is substantially the same. When pressed by the case projecting member 260, the tip of the case projecting member 260 is fitted into the dispensing plug groove 1850, so that the contact position of the case projecting member 260 with the ink dispensing plug 1840 is shifted. Inclination of the frame 1810 can be reduced. When the frame 1810 is tilted, the load applied to the joint member 610 may change and ink leakage may occur. However, the provision of the dispensing plug groove 1850 can prevent ink leakage.

  Next, the ink cartridge 3 according to the third embodiment will be described with reference to FIG. In the first embodiment, the ink flow path is closed by urging the valve member 620 in the direction of the joint member 610 by the elastic force of the first spring member 630 and the second spring member 650 (see FIG. 27A). ). On the other hand, the third embodiment is configured to urge the valve member 1930 toward the joint member 610 by the elastic force of the coil spring member 1940 made of a metal material or a resin material to block the ink flow path. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 1 of 1st Example, and the description is abbreviate | omitted.

  FIG. 32 is a cross-sectional view showing a cross section of a part of the ink supply unit 1910 of the ink cartridge 3 of the third embodiment, and FIG. 32A is a state before the ink extraction tube 1720 (see FIG. 26) is inserted. FIG. 32B shows a state after the ink extraction tube 1720 is inserted.

  As shown in FIG. 32, the valve mechanism 1920 of the third embodiment is in contact with the valve seat bottom 1110 of the valve seat member 660 fitted to the fitting portion 1450 and the joint contact portion 730 of the joint member 610. A coil spring member 1940 formed of a substantially conical coil spring is disposed between the valve member 1930 that closes the ink flow path.

  The valve member 1930 is formed in a substantially circular flat plate shape, and a valve through hole 1950 serving as an ink flow path is formed in the vicinity of the outer peripheral portion thereof. Although not shown, six valve through holes 1950 are formed substantially equally in the circumferential direction of the valve member 1930. Further, since the outer diameter of the valve member 1930 is formed substantially equal to the inner diameter of the valve mechanism insertion portion 1960, it is possible to reduce the inclination of the valve member 1930 when the valve member 1930 operates in the vertical direction. Can do. In particular, if the valve member 1930 is tilted when the ink cartridge 3 is detached from the ink jet printer 1710 (see FIG. 26), the contact position of the joint member 610 with the joint contact portion 730 changes, and ink leakage occurs. There is a case. However, in the third embodiment, since the valve member 1930 can be prevented from tilting and operating, the occurrence of ink leakage can be reduced.

  The coil spring member 1940 is a coil spring wound in a conical shape, and the larger diameter (upper side in FIG. 32) abuts on the valve seat bottom 1110 of the valve seat member 660 and the smaller diameter (lower side in FIG. 32). Is in contact with the valve member 1930. In the coil spring member 1940, the pitch length g is formed at substantially equal intervals in the expansion / contraction direction (vertical direction in FIG. 32). In addition, the coil spring member 1940 of the third embodiment is configured by four coil springs, and is illustrated as the first to fourth turns from the larger diameter to the smaller diameter. The inner diameter of the first volume is formed larger than the outer diameter of the second volume, the inner diameter of the second volume is formed larger than the outer diameter of the third volume, and the inner diameter of the third volume is larger than the outer diameter of the fourth volume. Largely formed. That is, a coil spring is used in which the inner diameter of the nth winding is larger than the outer diameter of the (n + 1) th winding.

  The coil spring member 1940 only needs to urge the valve member 1930 in the direction of the joint member 610 (downward in FIG. 32), so that the smaller diameter is brought into contact with the valve seat bottom 1110 of the valve seat member 660. The larger one may be disposed so as to contact the valve member 1930.

  As shown in FIG. 32 (b), when the ink extraction tube 1720 is inserted into the valve mechanism insertion portion 1960, the valve member 1930 is moved toward the valve seat member 660 by the ink extraction tube 1720 (in FIG. 32 (b)). The coil spring member 1940 is compressed. FIG. 32B shows a state where the ink cartridge 3 is mounted on the ink jet printer 1710 (see FIG. 26), and the inner diameter of the nth roll is formed larger than the outer diameter of the (n + 1) th roll. From the second volume to the fourth volume are stored inside the first volume. That is, the inclination angle of the cone at the time of non-compression is set to an inclination angle at which the first to fourth windings do not interfere in the compression direction during compression. Thus, when the ink extraction tube 1720 inserted into the valve mechanism insertion portion 1960 pushes the valve member 1930 in the direction of the valve seat member 660, the coil spring member 1940 has a thickness in this direction that is equal to the diameter of the winding. It is compressed compactly so that it is almost equal. Therefore, the length of the ink supply unit 1910 can be reduced compared to the case where the valve mechanism is formed from a plurality of members or the case where the coil spring is formed in a columnar shape, and the ink cartridge 1 can be made smaller. Can be Also, since only one coil spring member 1940 acts as a biasing member, the structure of the valve mechanism 1920 can be simplified.

  The ink flow path in a state where the ink cartridge 3 is mounted on the ink jet printer 1710 is indicated by an arrow G, and the cover through hole 1330 of the cover member 680, the second valve seat through hole 1150 of the valve seat member 660, An ink flow path is formed in the order of the valve through hole 1950 of the valve member 1930 and the ink extraction pipe 1720.

  Next, an ink cartridge 4 according to a fourth embodiment will be described with reference to FIG. In the first embodiment, the ink flow path is blocked by urging the valve member 620 toward the joint member 610 by the elastic force of the first spring member 630 and the second spring member 650. In contrast, the fourth embodiment is configured to urge the valve member 1930 in the direction of the joint member 610 by the elastic force of the coil spring member 2040 to block the ink flow path. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 1 of 1st Example, and the description is abbreviate | omitted. Further, since the valve member 1930 provided in the ink cartridge 4 of the fourth embodiment is the same as the valve member 1930 of the third embodiment, the description thereof is omitted.

  FIG. 33 is a sectional view showing a section of a part of the ink supply unit 2010 of the ink cartridge 4 of the fourth embodiment, and FIG. 33 (a) shows a state before the ink extraction tube 1720 is inserted, FIG. 33B shows a state after the ink extraction tube 1720 is inserted.

  As shown in FIG. 33, the valve mechanism 2020 of the fourth embodiment is in contact with the valve seat bottom 1110 of the valve seat member 660 fitted to the fitting portion 1450 and the joint abutting portion 730 of the joint member 610. Between the valve member 1930 that closes the ink flow path, a coil spring member 2040 configured by a coil spring spring including a substantially cylindrical portion and a substantially conical portion is disposed.

  The coil spring member 2040 is a coiled spring spring, and both end portions of the coil spring member 2040 in the expansion / contraction direction (the vertical direction in FIG. 33A) are each formed in a substantially cylindrical shape, and the intermediate portion is formed in a substantially conical shape. Is formed. The coil spring member 2040 has a larger diameter (upper side in FIG. 33 (a)) abuts on the valve seat bottom 1110 of the valve seat member 660, and a smaller diameter (lower side in FIG. 33 (a)) contacts the valve member 1930. It is in contact. The coil spring members 2040 are formed with substantially equal pitch lengths g in the expansion / contraction direction (vertical direction in FIG. 33). Further, the coil spring member 2040 of the fourth embodiment is composed of five coil springs, and is illustrated as the first to fifth rolls from the larger diameter to the smaller diameter. The first and second volumes are configured to have substantially the same diameter, and the inner diameters of the first and second volumes are larger than the outer diameter of the third volume. Is formed larger than the outer diameter of the fourth roll. The diameters of the fourth and fifth rolls are substantially the same. That is, the second to fourth rolls are formed in a substantially conical shape, and the inner diameter of the nth roll is larger than the outer diameter of the (n + 1) th roll from the second to the fourth roll.

  The coil spring member 2040 only needs to urge the valve member 1930 in the direction of the joint member 610 (downward in FIG. 33), so that the smaller diameter is brought into contact with the valve seat bottom 1110 of the valve seat member 660 to reduce the diameter. The larger one may be disposed so as to contact the valve member 1930.

  As shown in FIG. 33B, when the ink extraction tube 1720 is inserted into the valve mechanism insertion portion 2060, the valve member 1930 is pushed in the direction of the valve seat member 660 (upward in FIG. 33B). FIG. 33B shows a state in which the ink cartridge 4 is mounted on the ink jet printer 1710 (see FIG. 26). From the second roll to the fourth roll, the inner diameter of the nth roll is the (n + 1) th roll. Therefore, the third and fourth volumes are accommodated inside the second volume. Thus, when the ink extraction tube 1720 inserted into the valve mechanism insertion portion 2060 pushes the valve member 1930 in the direction of the valve seat member 660, the thickness of the coil spring member 2040 in this direction is 3 of the diameter of the winding. It is compressed compactly to be almost equal to twice. Therefore, the length of the ink supply member 2010 in the expansion / contraction direction can be shortened compared to the case where the valve mechanism is formed from a plurality of members, or the case where the entire coil spring is formed in a columnar shape. The cartridge 4 can be reduced in size. Further, since only one coil spring member 2040 acts as an urging member, the structure of the valve mechanism 2020 can be simplified.

  The ink flow path in a state where the ink cartridge 4 is mounted on the inkjet printer 1710 (see FIG. 26) is indicated by an arrow H, and the cover through hole 1330 of the cover member 680 and the second valve of the valve seat member 660 are shown. An ink flow path is formed in the order of the seat through hole 1150, the valve through hole 1940 of the valve member 1920, and the ink extraction tube 1720.

  Next, the ink cartridge 5 of the fifth embodiment will be described with reference to FIG. In the third embodiment, the valve seat member 660 and the cover member 680 are fitted in the fitting portion 1450. In contrast, the fifth embodiment is configured such that one end of the coil spring member 1940 comes into contact with a filter stopper member 2170 that prevents the filter 1420 from coming off. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 3 of 3rd Example, and the description is abbreviate | omitted.

  FIG. 34 is a cross-sectional view showing a cross section of a part of the ink supply unit 2110 of the ink cartridge 5 of the fifth embodiment.

  As shown in FIG. 34, the valve mechanism 2120 of the fifth embodiment is in contact with the valve member 1930, the coil spring member 1940, and one end side of the coil spring member 1940 in the filter 1420 direction (upward in FIG. 34). And a biased filter stopper member 2170.

  The filter stopper member 2170 is formed in a substantially circular flat plate shape, and a stopper through hole 2180 serving as an ink flow path is formed in the vicinity of the outer peripheral portion thereof. Although not shown, six stopper through holes 2180 are formed substantially equally in the circumferential direction of the filter stopper member 2170. Further, since the outer diameter of the filter stopper member 2170 is formed substantially equal to the inner diameter of the valve mechanism insertion portion 2160, the arrangement position of the filter stopper member 2170 is prevented from shifting. The filter stopper member 2170 may be configured such that the outer diameter of the filter stopper member 2170 is larger than the inner diameter of the valve mechanism insertion portion 2160 so that the filter stopper member 2170 is fixed.

  As shown in FIG. 34, since the filter stopper member 2170 is always urged by the coil spring member 1940, the filter 1420 does not come out into the valve mechanism insertion portion 2160. Therefore, dust and foreign matter can be accurately removed by the filter 1420. Further, since the valve mechanism 2120 is constituted by the filter stopper member 2170, the coil spring member 1940, and the valve member 1930, the ink cartridge 5 having a simplified structure can be provided.

  Next, the ink cartridge 6 of the sixth embodiment will be described with reference to FIG. In the first embodiment, the valve mechanism 530 includes a joint member 610, a valve member 620, a first spring member 630, a slider member 640, a second spring member 650, a valve seat member 660, a check valve 670 and a cover member 680. Configured. On the other hand, in the sixth embodiment, the slider member 640 is not provided and the valve member 1930 having a different shape is provided. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 1 of 1st Example, and the description is abbreviate | omitted. Further, since the valve member 1930 provided in the ink cartridge 6 of the sixth embodiment is the same as the valve member 1930 of the third embodiment, the description thereof is omitted.

  FIG. 35 is a sectional view showing a section of a part of the ink supply unit 140 of the ink cartridge 6 of the sixth embodiment, and FIG. 35 (a) shows a state before the ink extraction tube 1720 is inserted, FIG. 35B shows a state after the ink extraction tube 1720 is inserted.

  As shown in FIG. 35A, the valve mechanism 2220 of the sixth embodiment includes a valve seat bottom 1110 of the valve seat member 660 fitted to the fitting portion 1450, a joint abutting portion 730 of the joint member 610, A first spring member 2240 and a second spring member 2250 made of a resin material having elasticity such as rubber are disposed between the valve member 1930 that contacts and closes the ink flow path.

  The first spring member 2240 is formed of the same material and shape as the first spring member 630 of the first embodiment. Therefore, the configuration of the first spring member 2240 is formed to have a ring-shaped spring bottom 910 that forms the bottom surface (end of the larger diameter) of the first spring member 2240 and a diameter smaller than the diameter of the spring bottom 910. At the same time, a ring-shaped spring upper part 920 that forms the upper surface (the smaller diameter end part) of the first spring member 2240 is connected between the spring upper part 920 and the spring bottom part 910, and a load is applied. It mainly includes a hollow conical spring flexible portion 930 that bends and deforms in some cases. Further, an upper flow path 941 serving as an inner peripheral surface of the spring upper portion 920, a flexible portion flow path 942 serving as an inner peripheral surface of the spring flexible portion 930, and a bottom flow path 943 serving as an inner peripheral surface of the spring bottom portion 910, An ink flow path 940 is provided.

  The second spring member 2250 is made of the same material as the first spring member 2240 and has the same shape (the shape of the outer shape is different). The spring bottom portion 910, the spring upper portion 920, the spring flexible portion 930, and the spring flow The channel 940 (the upper channel 941, the flexible channel 942, and the bottom channel 943) is configured. The second spring member 2250 is symmetrically arranged by inverting the first spring member 2240 in the vertical direction.

  As shown in FIG. 35, the spring tops 920 of the first spring member 2240 and the second spring member 2250 are disposed in contact with each other, and the spring bottoms 910 are connected to the valve seat bottom 1110 of the valve seat member 660 and the valve. It arrange | positions so that it may contact | abut to the member 1930, respectively. Further, the side surface of the spring bottom portion 910 is in contact with the inner wall of the ink supply portion 140 formed in a hollow cylindrical shape, and movement in the diameter direction is restricted. Note that the contact surfaces of the spring upper portions 920 may be bonded (welded). Further, since the outer diameter of the spring bottom 910 is formed substantially equal to the inner diameter of the valve mechanism insertion portion 1460, the displacement of the spring members 2240 and 2250 is reduced.

  As shown in FIG. 35B, when the ink extraction tube 1720 is inserted into the valve mechanism insertion portion 1460, the valve member 1930 is pushed in the valve seat member 660 direction (upward direction in FIG. 35B). FIG. 35B shows a state where the ink cartridge 6 is mounted on the ink jet printer 1710 (see FIG. 26), and the spring flexible portions 930 of the first spring member 2240 and the second spring member 2250 are elastically deformed, respectively. Shows the state.

  At this time, the elastically deformed first spring member 2240 and second spring member 2250 are restricted from moving in the diametrical direction because the side surface of the spring bottom 910 having the largest diameter is in contact with the inner wall of the ink supply unit 140. Yes. As a result, shaft shake that tends to occur with elastic deformation is prevented.

  The ink flow path in a state where the ink cartridge 6 is mounted on the ink jet printer 1710 is indicated by an arrow J. The cover through hole 1330 of the cover member 680, the second valve seat through hole 1150 of the valve seat member 660, An ink flow path is formed in the order of the ink flow path 940 of each spring member 2240, 2250, the valve through hole 1950 of the valve member 1930, and the ink extraction pipe 1720.

  Next, the ink cartridge 7 of the seventh embodiment will be described with reference to FIG. In the first embodiment, the ink flow path is closed by urging the valve member 620 in the direction of the joint member 610 by the elastic force of the first spring member 630 and the second spring member 650 (see FIG. 27A). ). In contrast, the seventh embodiment is configured to urge the valve member 1930 in the direction of the joint member 610 by the elastic force of the spring member 2340 formed in a substantially cylindrical shape to block the ink flow path. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 1 of 1st Example, and the description is abbreviate | omitted. Further, since the valve member 1930 provided in the ink cartridge 7 of the seventh embodiment is the same as the valve member 1930 of the third embodiment, the description thereof is omitted.

  FIG. 36 is a cross-sectional view showing a cross section of a part of the ink supply unit 140 of the ink cartridge 7 of the seventh embodiment. FIG. 36 (a) shows a state before the ink extraction tube 1720 is inserted, FIG. 36B shows a state after the ink extraction tube 1720 is inserted.

  As shown in FIG. 36, the valve mechanism 2320 of the seventh embodiment is in contact with the valve seat bottom 1110 of the valve seat member 660 fitted to the fitting portion 1450 and the joint contact portion 730 of the joint member 610. A substantially hollow cylindrical spring member 2340 made of a resin material having elasticity such as rubber is disposed between the valve member 1930 that closes the ink flow path.

  The spring member 2340 has two spring end portions 2350, a spring end portion 2350 that contacts the valve seat bottom portion 1110 of the valve seat member 660 and a spring end portion 2350 that contacts the valve member 1930 (both upper and lower sides in FIG. 36). ). Between the two spring end portions 2350, a spring flexible portion 2360 is formed that bends and deforms when a load is applied. Since the spring flexible portion 2360 is formed thinner than the spring end portion 2350, when the strength of the spring flexible portion 2360 is weakened and the spring member 2340 is elastically deformed, the spring flexible portion 2360 is bent and deformed. To do. Further, since the outer diameter of the spring end portion 2350 is formed to be substantially equal to the inner diameter of the valve mechanism insertion portion 1460, it is possible to reduce the displacement of the spring member 2340.

  As shown in FIG. 36B, when the ink extraction tube 1720 is inserted into the valve mechanism insertion portion 1460, the valve member 1930 is pushed toward the valve seat member 660 (upward in FIG. 36B). FIG. 36B shows a state where the ink cartridge 7 is attached to the ink jet printer 1710 (see FIG. 26), and shows a state where the spring flexible portion 2360 is elastically deformed. The spring flexible portion 2360 is elastically deformed alternately in a direction substantially perpendicular to the expansion / contraction direction (vertical direction in FIG. 36).

  The ink flow path in a state where the ink cartridge 7 is mounted on the inkjet printer 1710 is indicated by an arrow K, and the cover through hole 1330 of the cover member 680, the second valve seat through hole 1150 of the valve seat member 660, An ink flow path is formed in the order of the hollow interior of the spring member 2340, the valve through hole 1950 of the valve member 1930, and the ink extraction tube 1720.

  Next, the ink cartridge 8 of the eighth embodiment will be described with reference to FIG. In the first embodiment, the valve mechanism 530 includes a joint member 610, a valve member 620, a first spring member 630, a slider member 640, a second spring member 650, a valve seat member 660, a check valve 670 and a cover member 680. Configured. On the other hand, in the eighth embodiment, the slider member 640 is not provided and the valve member 2430 having a different shape is provided. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 1 of 1st Example, and the description is abbreviate | omitted.

  FIG. 37 is a sectional view showing a section of a part of the ink supply unit 140 of the ink cartridge 8 of the eighth embodiment, and FIG. 37 (a) shows a state before the ink extraction tube 1720 is inserted, FIG. 37B shows a state after the ink extraction tube 1720 is inserted.

  As shown in FIG. 37A, the valve mechanism 2320 of the eighth embodiment is in contact with the valve seat bottom portion 1110 of the valve seat member 660 fitted to the fitting portion 1450 and the joint member 2470, and the ink flow. A first spring member 2440 and a second spring member 2450 made of a resin material having elasticity such as rubber are disposed between the valve member 2430 that closes the path.

  Here, the valve member 2430 will be described with reference to FIG. 38 is a view showing the valve member 2430, FIG. 38 (a) is a side view of the valve member 2430, FIG. 38 (b) is a plan view of the valve member 2430, and FIG. ) Is a bottom view of the valve member 2430, and FIG. 38 (d) is a sectional view taken along line XXXVIIId-XXXVIIId in FIG. 38 (b).

  As shown in FIG. 38A, the valve member 2430 includes a valve bottom portion 2431 that forms the bottom wall (lower side of FIG. 38A) of the valve member 2430, and a valve outer periphery portion that forms the outer peripheral wall of the valve member 2430. 2432, a valve groove portion 2433 formed from the upper end surface (the upper end surface in FIG. 38A) of the valve outer peripheral portion 2432 toward the valve bottom portion 2431 and serving as an ink flow path, and from the valve bottom portion 2431 to the valve outer peripheral portion 2432. And a valve protrusion member 2434 that protrudes on the opposite side (downward in FIG. 38 (a)).

  As shown in FIG. 38 (b), the valve groove portion 2433 is formed at four locations on the valve outer peripheral portion 2432, and is formed at substantially equal intervals in the circumferential direction of the valve outer peripheral portion 2432. As shown in FIG. 38C, the valve protrusion 2434 is formed on the outer edge portion of the valve bottom 2431, and the valve protrusion 2434 and the joint member 2470 (see FIG. 37) come into contact with each other. The ink flow path is blocked.

  As shown in FIG. 38 (b), the valve member 2430 protrudes from the valve outer peripheral portion 2432 toward the center of the valve outer peripheral portion 2432, and at an intermediate position between the valve groove portions 2433 in the circumferential direction of the valve member 2430. A valve receiving portion 2435 that receives the first spring member 2440 is formed. The valve receiving portion 2435 contacts the spring upper portion 920 of the first spring member 2440 and receives it, and contacts the side surface of the spring upper portion 920 to suppress the displacement of the first spring member 2440. And a valve receiving surface 2437 that receives the spring upper portion 920 in contact with the opening surface of the upper flow path 941 of the spring upper portion 920.

  As shown in FIG. 38 (d), the valve receiver 2435 has a valve restraining surface 2436 formed at a substantially intermediate position in the height direction of the valve receiver 2435 (the vertical direction in FIG. 38 (d)). A surface 2437 is formed substantially parallel to the valve bottom 2431. Therefore, the first spring member 2440 can be received without rattling.

  Returning to FIG. The joint member 2470 forms an outer peripheral wall of the joint member 2470 and is exposed to the outside of the ink supply unit 140, a joint inner peripheral portion 2472 accommodated inside the ink supply unit 140, A joint fitting portion 2473 formed between the peripheral portion 2472 and the joint outer peripheral portion 2471 and fitted with the outer peripheral wall of the ink supply portion 140, and a joint inner peripheral portion 2472, through which the ink extraction pipe 1720 is inserted. And a joint insertion portion 2474. The joint member 2470 is made of an elastic material such as rubber, and the ink flow path is blocked by the contact between the joint inner peripheral portion 2472 and the valve protrusion 2434 of the valve member 2430.

  The upper surface of the joint inner peripheral portion 2472 that contacts the valve protrusion 2434 is a flat surface.

  As shown in FIG. 37A, the valve mechanism 2420 of the eighth embodiment is in contact with the valve seat bottom portion 1110 of the valve seat member 660 fitted to the fitting portion 1450 and the joint member 2470, and the ink flow. A first spring member 2440 and a second spring member 2450 are disposed between the valve member 2430 that closes the path.

  The first spring member 2440 is formed in the same shape as the first spring member 630 of the first embodiment (the shape of the outer shape is different). Therefore, the configuration of the first spring member 2440 is formed to have a ring-shaped spring bottom 910 that forms the bottom surface (end of the larger diameter) of the first spring member 2440 and a diameter smaller than the diameter of the spring bottom 910. In addition, a ring-shaped spring upper part 920 that forms the upper surface (the smaller diameter end part) of the first spring member 2440 is connected to the spring upper part 920 and the spring bottom part 910, and a load is applied. It mainly includes a hollow conical spring flexible portion 930 that bends and deforms in some cases. Further, an upper flow path 941 serving as an inner peripheral surface of the spring upper portion 920, a flexible portion flow path 942 serving as an inner peripheral surface of the spring flexible portion 930, and a bottom flow path 943 serving as an inner peripheral surface of the spring bottom portion 910, An ink flow path 940 is provided.

  The second spring member 2450 is formed in the same shape as the first spring member 2440, and includes a spring bottom 910, a spring upper portion 920, a spring flexible portion 930, and a spring flow path 940 (upper flow path 941, flexible portion flow path). 942 and bottom channel 943). The second spring member 2450 is disposed by inverting the first spring member 2430 in the up-down direction. As shown in FIG. 37A, the spring bottom portions 910 of the first spring member 2440 and the second spring member 2450 are disposed in contact with each other, and the spring top portions 920 are the valve seat bottom portions of the valve seat member 660. 1110 and the valve receiving portion 2435 of the valve member 2430 are disposed so as to contact each other. Note that the contact surfaces of the spring bottom portions 910 may be bonded (welded). In addition, since the outer diameter of the spring bottom portion 910 of each spring member 2440, 2450 is formed substantially the same as the inner diameter of the valve mechanism insertion portion 1460, even if each spring member 2440, 2450 is deformed, It is possible to reduce the displacement of the position in the orthogonal direction.

  As shown in FIG. 37 (b), when the ink extraction tube 1720 is inserted into the valve mechanism insertion portion 1460, the valve member 2430 is pushed in the direction of the valve seat member 660 (upward in FIG. 37 (b)). FIG. 37B shows a state where the ink cartridge 8 is mounted on the ink jet printer 1710 (see FIG. 26), and the spring flexible portions 930 of the first spring member 2440 and the second spring member 2450 are elastically deformed, respectively. The state is shown.

  The ink flow path in a state where the ink cartridge 8 is mounted on the ink jet printer 1710 is indicated by an arrow L, and the cover through hole 1330 of the cover member 680, the second valve seat through hole 1150 of the valve seat member 660, The ink flow paths are formed in the order of the ink flow paths 940 of the spring members 2440 and 2450, the valve groove portion 2433 of the valve member 2430, and the ink extraction pipe 1720.

  Next, the ink cartridge 9 of the ninth embodiment will be described with reference to FIG. In the eighth embodiment, the first spring member 2440 and the second spring member 2450 are provided between the valve seat member 660 that receives the check valve 670 and the valve member 2430 that contacts the joint member 2470 and closes the ink flow path. It was set as the structure provided with. In contrast, in the ninth embodiment, a spring member 2540 is provided between the valve seat member 660 and the valve member 2430. The same parts as those of the ink cartridge 8 of the eighth embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 39 is a cross-sectional view showing a cross section of a part of the ink supply unit 140 of the ink cartridge 9 of the ninth embodiment. FIG. 39A shows a state before the ink extraction tube 1720 is inserted, FIG. 39B shows a state after the ink extraction tube 1720 is inserted.

  As shown in FIG. 39A, the valve mechanism 2520 of the ninth embodiment is in contact with the valve seat bottom portion 1110 of the valve seat member 660 fitted to the fitting portion 1450 and the joint member 2470, and the ink flow. A spring member 2540 made of a resin material having elasticity such as rubber is disposed between the valve member 2430 that closes the path.

  The spring member 2540 includes a spring cylindrical portion 2550 formed in a substantially cylindrical shape, a spring end portion 2560 having a smaller diameter than the spring cylindrical portion 2550 that contacts the valve support portion 2435 of the valve member 2430, and the spring end portion 2560 and the spring cylindrical portion. And a hollow conical spring flexible portion 2570 that is bent and deformed when a load is applied. Since the spring cylindrical portion 2550 is in contact with the inner peripheral surface of the valve mechanism insertion portion 1460, elastic deformation outward in the radial direction is restricted. As a result, the spring flexible portion 2570 is elastically deformed.

  As shown in FIG. 39B, when the ink extraction tube 1720 is inserted into the valve mechanism insertion portion 1460, the valve member 2430 is pushed in the direction of the valve seat member 660 (upward in FIG. 36B). FIG. 39B shows a state where the ink cartridge 9 is mounted on the ink jet printer 1710 (see FIG. 26), and shows a state where the spring flexible portion 2570 is elastically deformed.

  The ink flow path in a state where the ink cartridge 9 is mounted on the ink jet printer 1710 is indicated by an arrow M, and the cover through hole 1330 of the cover member 680, the second valve seat through hole 1150 of the valve seat member 660, An ink flow path is formed in the order of the hollow interior of the spring member 2540, the valve groove 2433 of the valve member 2430, and the ink extraction tube 1720.

  Next, the ink cartridge 10 of the tenth embodiment will be described with reference to FIG. In the eighth embodiment, the first spring member 2440 and the second spring member 2450 are disposed between the valve seat member 660 that supports the check valve 670 and the valve member 2430 that contacts the joint member 2470 and closes the ink flow path. It was set as the structure provided with. In contrast, in the tenth embodiment, the first spring member 2640 and the second spring made of a resin material having elasticity such as rubber formed between the valve seat member 660 and the valve member 2430 in a substantially hollow hemispherical shape. A member 2650 is provided. The same parts as those of the ink cartridge 8 of the eighth embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  40 is a cross-sectional view showing a cross section of a part of the ink supply unit 140 of the ink cartridge 10 of the tenth embodiment, and FIG. 40A shows a state before the ink extraction tube 1720 is inserted, FIG. 40B shows a state after the ink extraction tube 1720 is inserted.

  As shown in FIG. 40A, the valve mechanism 2620 of the tenth embodiment is in contact with the valve seat bottom portion 1110 of the valve seat member 660 fitted to the fitting portion 1450 and the joint member 2470, and the ink flow. A first spring member 2640 and a second spring member 2650 formed in a substantially hollow hemispherical shape are disposed between the valve member 2430 that closes the path.

  The first spring member 2640 includes a spring end portion 2660 that contacts the valve receiving portion 2435 of the valve member 2430 and a spring flexible portion 2670 that extends in the radial direction from the spring end portion 2660 and is formed in a substantially hollow hemispherical shape. Configured. The second spring member 2650 is formed in the same shape as the first spring member 2640 and includes a spring end portion 2660 and a spring flexible portion 2670. The opening portions of the spring flexible portion 2670 of the first spring member 2640 and the second spring member 2650 are in contact with each other without any gap. The opening portions of the spring flexible portion 2670 of the first spring member 2640 and the second spring member 2650 may be bonded (welded) to be connected.

  As shown in FIG. 40B, when the ink extraction tube 1720 is inserted into the valve mechanism insertion portion 1460, the valve member 2430 is pushed toward the valve seat member 660 (upward in FIG. 36B). FIG. 40B shows a state where the ink cartridge 10 is mounted on the ink jet printer 1710 (see FIG. 26), and shows a state where the spring flexible portions 2670 of the spring members 2640 and 2650 are elastically deformed. .

  The ink flow path in a state where the ink cartridge 10 is mounted on the ink jet printer 1710 is indicated by an arrow N, and the cover through hole 1330 of the cover member 680, the second valve seat through hole 1150 of the valve seat member 660, An ink flow path is formed in the order of the inside of each spring member 2640, 2650, the valve groove portion 2433 of the valve member 2430, and the ink extraction pipe 1720.

  Next, the ink cartridge 11 of the eleventh embodiment will be described with reference to FIG. In the eighth embodiment, the first spring member 2440 and the second spring member 2450 are provided between the valve seat member 660 that receives the check valve 670 and the valve member 2430 that contacts the joint member 2470 and closes the ink flow path. It was set as the structure provided with. On the other hand, in the eleventh embodiment, a spring member 2740 and a slider member 2780 operating in conjunction with the spring member 2740 are provided between the valve seat member 660 and the valve member 2430. The same parts as those of the ink cartridge 8 of the eighth embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 41 is a sectional view showing a section of a part of the ink supply part 140 of the ink cartridge 11 of the eleventh embodiment, and FIG. 41 (a) shows a state before the ink extraction tube 1720 is inserted, FIG. 41B shows a state after the ink extraction tube 1720 is inserted.

  As shown in FIG. 41 (a), the valve mechanism 2720 of the eleventh embodiment is in contact with the valve seat bottom 1110 of the valve seat member 660 fitted to the fitting portion 1450 and the joint member 2470, and the ink flow. A spring member 2740 made of a resin material having elasticity such as rubber is connected between the valve member 2430 and the valve member 2430 that closes the road, and the spring member 2740 is moved in the expansion / contraction direction (the vertical direction in FIG. 41A). And a slider member 2780 for restricting.

  The spring member 2740 connects the spring cylindrical portion 2750 formed in a substantially cylindrical shape, the spring end portion 2751 that contacts the valve receiving portion 2435 of the valve member 2430, and the spring end portion 2751 and the spring cylindrical portion 2750. In addition, a spring flexible portion 2752 that bends and deforms when a load is applied and a spring groove portion 2753 that is formed in a concave shape so as to be fitted and fixed to the slider member 2780 are provided. Although not shown, the spring groove portion 2753 is formed over the outer peripheral surface of the spring cylindrical portion 2750. Further, the spring cylindrical portion 2750 is formed thicker than the spring flexible portion 2752, and the strength is increased, so that the spring flexible portion 2752 is bent and deformed.

  The slider member 2780 is formed in a substantially cylindrical shape. The slider mounting portion 2781 is formed on the inner peripheral surface of the slider member 2780 to which the spring member 2740 is mounted. The slider mounting portion 2781 is formed in a convex shape. And a slider projection 2782 to be fitted. Although not shown, the slider mounting portion 2781 and the slider convex portion 2782 are formed over the inner peripheral surface of the spring member 2740. Therefore, the slider convex portion 2782 and the spring groove portion 2753 are fitted to each other, and the slider member 2780 and the spring member 2740 are fixed to each other. The slider member 2780 is made of a resin material having a hardness higher than that of the spring member 2740. Therefore, when the ink extraction tube 1720 is inserted, the slider member 2780 is not deformed and the spring member 2740 is bent and deformed. Further, the outer diameter of the slider member 2780 is formed substantially equal to the inner diameter of the valve mechanism insertion portion 1460, and the slider member 2780 is prevented from moving out of the moving direction.

  As shown in FIG. 41B, when the ink extraction tube 1720 is inserted into the valve mechanism insertion portion 1460, the valve member 2430 is pushed toward the valve seat member 660 (upward in FIG. 36B). FIG. 41B shows a state where the ink cartridge 11 is mounted on the ink jet printer 1710 (see FIG. 26), and shows a state where the spring flexible portion 2752 is elastically deformed. First, when the ink extraction tube 1720 is inserted, the slider member 2780 moves in the direction of the valve seat member 660 (upward in FIG. 41B), and the slider member 2780 and the valve seat member 660 move. The movement of the slider member 2780 (spring member 2740) is restricted by contact. Thereafter, when the ink extraction tube 1720 is further inserted, the spring flexible portion 2752 is elastically deformed. Therefore, by providing the slider member 2780, the ink extraction tube 1720 can be smoothly inserted.

  The ink flow path in a state where the ink cartridge 11 is mounted on the inkjet printer 1710 is indicated by an arrow O, and the cover through-hole 1330 of the cover member 680, the second valve seat through-hole 1150 of the valve seat member 660, An ink flow path is formed in the order of the inside of the spring member 2740, the valve groove portion 2433 of the valve member 2430, and the ink extraction pipe 1720.

  Next, the ink cartridge 12 of the twelfth embodiment will be described with reference to FIG. In the eighth embodiment, the valve seat member 660 that receives the check valve 670 and the valve member 2430 that contacts the joint member 2470 and closes the ink flow path are made of a resin material having elasticity such as rubber. The spring member 2440 and the second spring member 2450 are provided. In contrast, in the twelfth embodiment, the first spring member 2840, the second spring member 2850, and the spring members 2840 and 2850 are sandwiched between the valve seat member 660 and the valve member 2430, and interlocked with these. And a slider member 2880 that operates. The same parts as those of the ink cartridge 8 of the eighth embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 42 is a sectional view showing a section of a part of the ink supply unit 140 of the ink cartridge 12 of the twelfth embodiment, and FIG. 42A shows a state before the ink extraction tube 1720 is inserted, FIG. 42B shows a state after the ink extraction tube 1720 is inserted.

  As shown in FIG. 42A, the valve mechanism 2820 of the twelfth embodiment is in contact with the valve seat bottom 1110 of the valve seat member 660 fitted in the fitting portion 1450 and the joint member 2470, and the ink flow. The first spring member 2840, the second spring member 2850, and the second spring member 2850 and the first spring member 2840 are disposed between the valve member 2430 and the valve member 2430 for closing the path. A slider member 2880 that accommodates a part of 2850 and moves in conjunction with the spring members 2840 and 2850 is disposed.

  The first spring member 2840 is formed in the same shape as the first spring member 630 of the first embodiment (a shape having a different outer shape). Therefore, the configuration of the first spring member 2840 is formed in a ring-shaped spring bottom portion 910 that forms the bottom surface (the end portion having the larger diameter) of the first spring member 2840 and a diameter smaller than the diameter of the spring bottom portion 910. At the same time, a ring-shaped spring upper part 920 that forms the upper surface (the smaller diameter end part) of the first spring member 2840 is connected between the spring upper part 920 and the spring bottom part 910, and a load is applied. It mainly includes a hollow conical spring flexible portion 930 that bends and deforms in some cases. Further, an upper flow path 941 serving as an inner peripheral surface of the spring upper portion 920, a flexible portion flow path 942 serving as an inner peripheral surface of the spring flexible portion 930, and a bottom flow path 943 serving as an inner peripheral surface of the spring bottom portion 910, An ink flow path 940 is provided.

  The second spring member 2850 is formed in the same shape as the first spring member 2840, and includes a spring bottom 910, a spring upper part 920, a spring flexible part 930 and a spring flow path 940 (upper flow path 941, flexible part flow path). 942 and bottom channel 943). The second spring member 2850 is disposed by inverting the first spring member 2840 in the vertical direction.

  The slider member 2880 is formed at an intermediate position between a cylindrical slider outer peripheral portion 2890 that forms the outer wall of the slider member 2880 and a moving direction of the slider outer peripheral portion 2890 (the vertical direction in FIG. 42A). The slider intermediate wall 2891 is in contact with the spring bottom 910 of the 2840 and the second spring member 2850, and the slider intermediate wall 2891 is formed through the slider intermediate wall 2891 so as to pass therethrough and serve as an ink flow path. Since the inner diameter of the slider outer peripheral portion 2890 and the outer diameter of the spring bottom portion 910 of each spring member 2840, 2850 are substantially equal, it is possible to prevent the disposition positions of the spring members 2840, 2850 from shifting. Further, since the outer diameter of the slider member 2880 is formed substantially equal to the inner diameter of the valve mechanism insertion portion 1460, the slider member 2880 is prevented from moving out of the moving direction. Further, since the slider member 2880 is made of a resin material having a higher hardness than the spring members 2840 and 2850, when the ink extraction tube 1720 is inserted, the slider member 2880 is not deformed. The spring members 2840 and 2850 are bent and deformed.

  As shown in FIG. 42A, the spring bottom portions 910 of the first spring member 2840 and the second spring member 2850 are in contact with the slider intermediate wall 2891, and the spring top portions 920 are the valve seats of the valve seat member 660. The bottom portion 1110 and the valve receiving portion 2435 of the valve member 2430 are disposed so as to contact each other.

  As shown in FIG. 42B, when the ink extraction tube 1720 is inserted into the valve mechanism insertion portion 1460, the valve member 2430 is pushed toward the valve seat member 660 (upward in FIG. 36B). FIG. 42B shows a state where the ink cartridge 12 is mounted on the ink jet printer 1710 (see FIG. 26), and shows a state where the spring flexible portion 930 is elastically deformed.

  First, when the ink extraction pipe 1720 is inserted, the slider member 2880 moves in the direction of the valve seat member 660 (upward in FIG. 42B), and the slider member 2880 and the valve seat member 660 are moved. The movement of the slider member 2880 is restricted by contact. The movement of the slider member 2880 may be restricted by contacting the end surface of the inner wall of the ink supply unit 140 instead of the valve seat member 660. Thereafter, when the ink extraction tube 1720 is further inserted, the spring flexible portions 930 of the spring members 2840 and 2850 are elastically deformed. Therefore, by providing the slider member 2880, the ink extraction tube 1720 can be smoothly inserted. Furthermore, since the movement is restricted by the slider member 2880, the second spring member 2850 can be prevented from being extremely deformed. Therefore, it is possible to prevent the second spring member 2850 from being extremely deformed to return to the original state, and to prevent ink leakage.

  The ink flow path in a state where the ink cartridge 12 is mounted on the inkjet printer 1710 is indicated by an arrow P, and the cover through hole 1330 of the cover member 680, the second valve seat through hole 1150 of the valve seat member 660, The ink flow path is formed in the order of the ink flow path 940 of the second spring member 2850, the slider through hole 2892 of the slider member 2880, the ink flow path 940 of the first spring member 2840, the valve groove portion 2433 of the valve member 2430, and the ink extraction pipe 1720. It is formed.

  Next, the ink cartridge 13 of the thirteenth embodiment will be described with reference to FIG. In the first example, the case dispensing member 260 presses the ink dispensing plug 520 to support the frame 100 with respect to the case 200 at two points, the ink supply unit 140 and the ink dispensing unit 130, and is transmitted to the frame 100. The external vibration is reduced. In contrast, in the thirteenth embodiment, the case protrusion member 3220 presses a portion different from the ink dispensing unit 130 of the frame 100 to suppress external vibration. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 1 of 1st Example, and the description is abbreviate | omitted.

  FIG. 43 is a cross-sectional view schematically showing a cross section of the ink cartridge 13 of the thirteenth embodiment. In FIG. 43, the frame 100 is indicated by a virtual line, and the case 3210 and the cap 300 are indicated by a solid line.

  As shown in FIG. 43, the case 3210 of the thirteenth embodiment includes a case protrusion member 3220 that protrudes from the ceiling wall of the case 3210 toward the cap 300 (lower side in FIG. 43). The case protrusion member 3220 is formed at a substantially central portion of the ceiling wall of the case 3210.

  The case protrusion member 3220 is in contact with a portion different from the ink dispensing unit 130 of the frame 100 in a state where the case 3210 and the cap 300 are welded, and presses the frame 100 toward the cap 300 side. Therefore, it is possible to reduce the swing of the frame 100 due to vibration or the like. In addition, since the case protrusion member 3220 is formed at a substantially central portion of the ceiling wall of the case 3210, the center position of the frame 100 in the horizontal direction (left and right direction in FIG. 43) is pressed. Therefore, the frame 100 is stabilized in the pressed state, and the swing of the frame 100 can be further reduced.

  In addition, the ink cartridge 13 of the thirteenth embodiment is prepared by dispensing the ink dispensing plug 520 that is press-fitted into the ink dispensing unit 130 when the frame 100 is manufactured (see FIG. 22C), The pressure is pressed until it comes into contact with the end surface on the heel side of the dispensing inner peripheral portion 131 facing the opening of the ink dispensing portion 130.

  Next, the ink cartridge 14 according to the fourteenth embodiment will be described with reference to FIG. In the first example, the case dispensing member 260 presses the ink dispensing plug 520 to support the frame 100 with respect to the case 200 at two points, the ink supply unit 140 and the ink dispensing unit 130, and is transmitted to the frame 100. The external vibration is reduced. In contrast, in the fourteenth embodiment, the case protrusion member 3320 formed on the case 3310 presses the frame receiving portion 3340 formed on the frame 3330 instead of the ink dispensing portion 130 on the frame 3330. It is configured to reduce transmitted external vibration. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 1 of 1st Example, and the description is abbreviate | omitted.

  FIG. 44 is a cross-sectional view schematically showing a cross section of the ink cartridge 14 of the fourteenth embodiment. In FIG. 44, the frame 100 is indicated by a virtual line, and the case 3310 and the cap 300 are indicated by a solid line.

  As shown in FIG. 44, the case 3310 of the fourteenth embodiment protrudes from the ceiling wall of the case 3310 toward the cap 300 (the lower side in FIG. 44), and is formed at a substantially central portion of the ceiling wall of the case 3310. A protruding member 3320 is provided. The case protrusion member 3320 has a pointed tip. The frame 3330 includes a frame receiving portion 3340 made of an elastic material at a position corresponding to the case protrusion member 3320 different from the position where the ink dispensing unit 130 is formed. When the case 3310 and the cap 300 are welded, the case protrusion member 3320 is stuck into the frame receiving portion 3340 and presses the frame 3330 toward the cap 300 side.

  Therefore, as in the first embodiment, even if an impact is applied to the case 3310, it is transmitted to the frame 3330 in a relaxed manner, so that the frame 3330 can be protected from an external impact. The case protrusion member 3320 is formed at a substantially central portion of the ceiling wall of the case 3310. Accordingly, since the frame 3330 is pierced and pressed at the center position in the lateral direction (left and right direction in FIG. 44), the frame 3330 is stabilized in the pressed state.

  In addition, the ink cartridge 13 of the fourteenth embodiment dispenses ink with the ink dispensing plug 520 that is press-fitted into the ink dispensing unit 130 when the frame 3330 is manufactured (see FIG. 22C). The pressure is pressed until it comes into contact with the end surface on the heel side of the dispensing inner peripheral portion 131 facing the opening of the ink dispensing portion 130.

  Next, the ink cartridge 15 of the fifteenth embodiment will be described with reference to FIG. In the first embodiment, the check valve 670 has a substantially dish shape. In contrast, in the fifteenth embodiment, the check valve 3430 includes a dish-shaped portion and a shaft portion. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 1 of 1st Example, and the description is abbreviate | omitted.

  FIG. 45 is a view showing a cross section of the ink cartridge 15 of the fifteenth embodiment.

  The valve mechanism 3420 of the fifteenth embodiment includes a joint member 610, a valve member 620, a first spring member 640, a slider member 650, a second spring member 650, and a valve seat member 660 that have the same shape as the first embodiment. Yes. Further, the valve mechanism 3420 includes a check valve 3430 and a cover member 3450.

  The check valve 3430 is positioned in the vicinity of a check valve plate portion 3431 formed in a substantially dish shape, a check valve shaft portion 3432 formed in a substantially rod shape, and a cover member 3450 of the check valve shaft portion 3432. , And a check valve ball portion 3433 formed in a substantially spherical shape.

  The cover member 3450 is formed so as to penetrate the cover outer peripheral wall 3451 that forms the outer peripheral wall of the cover member 3450, the cover upper portion 3452 that forms the upper portion of the cover member 3450, and the vicinity of the outer edge of the cover upper portion 3452, and the ink flow path. A first cover through hole 3453 and a second cover through hole 3454 formed at the axial center of the cover upper part 3452 and through which the check valve shaft 3432 is inserted. The diameter of the second cover through hole 3454 is formed larger than the diameter of the check valve shaft portion 3432 and smaller than the diameter of the check valve ball portion 3433. Therefore, after the check valve shaft 3432 is passed through the second cover through hole 3454, the check valve 3430 does not fall out of the cover member 3450, and the check valve 3430 is lost when the valve mechanism 3420 is manufactured. Can be reduced.

  Further, in the ink cartridge 15 of the fifteenth embodiment, since the check valve shaft 3432 of the check valve 3430 is disposed in the ink flow path 1410, a filter 1420 is disposed in the ink flow path 1410. However, the filter 1420 may be provided.

  Next, the ink cartridge 16 of the sixteenth embodiment will be described with reference to FIG. The ink cartridge 1 of the first embodiment is mounted on the ink jet printer 1710 (see FIG. 26) by a pair of clamp members 1740. On the other hand, the ink cartridge 16 of the sixteenth embodiment is configured so that the ink cartridge 16 is mounted by one clamp member 3543 and the ink cartridge 16 is detached by the clamp release member 3544.

  FIG. 46 is a diagram illustrating a mounting process of the ink cartridge 16 according to the sixteenth embodiment to the mounting portion 3530.

  As shown in FIG. 46A, the ink cartridge 16 of the sixteenth embodiment has different lengths in the mounting direction of the ink cartridge 16 (arrow R in FIG. 46) on the pair of opposite side surfaces of the case 3510. Case protrusions 3520 and 3521 projecting to the same position as the cap side wall 320 of the cap 300 are formed in a direction substantially perpendicular to the mounting direction. The case protrusion 3520 has a shorter length in the mounting direction of the ink cartridge 16 (upper side in FIG. 46A), and the case protrusion 3521 has a longer length in the mounting direction of the ink cartridge 16 ( FIG. 46 (a) lower side). The cap 300 is formed in the same shape as the first embodiment, and a part of the case 3510 is surrounded by the cap side wall 320.

  Here, the mounting portion 3530 in which the ink cartridge 16 is mounted will be described. The mounting portion 3530 includes a side wall support plate 3540 that supports the side surface of the ink cartridge 16 (a part of the side surface of the case 3510 and a part of the cap side wall 320 of the cap 300) from below, and a bottom that receives the cap bottom wall 310 of the cap 300. The ink cartridge 16 is mounted by engaging the wall receiving plate 3541, the urging member 3542 that urges the bottom wall support plate 3541 in the opposite direction (counter arrow R direction), and the cap side wall 320 of the cap 300. A clamp member 3543 that locks to the portion 3530 and a clamp release member 3544 that releases the engagement state of the clamp member 3543 are provided.

  The inner side of the side wall support plate 3540 (the side that contacts the side surface of the ink cartridge 16) is formed corresponding to the shape (curvature) of the cap side wall 320, and when the ink cartridge 16 is mounted, The ink cartridge 16 can be guided toward the bottom wall support plate 3541 (right direction in FIG. 46A). Further, the clamp release member 3544 is formed with a slide groove (not shown) corresponding to the shape of the case protrusion 3520, and the ink cartridge 16 is directed toward the bottom wall support plate 3541 (like the side wall support plate 3540). It is configured to be guided in the right direction in FIG. Therefore, the ink cartridge 16 can be mounted smoothly and can be prevented from being mounted in an inclined state with respect to the bottom wall support plate 3541.

  The bottom wall support plate 3541 is formed with an insertion hole 3545 through which the ink extraction tube 3550 can be inserted. When the bottom wall support plate 3541 operates in the mounting direction (arrow R direction), the ink extraction tube 3550 is inserted. It is inserted into the hole 3545 and protrudes toward the ink cartridge 16 side.

  The clamp member 3543 is formed with an inclined surface 3546 inclined with respect to the mounting direction (arrow R direction), and the clamp release member 3544 is formed with an inclined surface 3547 corresponding to the inclined surface 3546 of the clamp member 3543. The clamp member 3543 and the clamp release member 3544 are arranged so that the inclined surfaces (the inclined surface 3546 and the inclined surface 3547) are substantially parallel to each other.

  FIG. 46B shows a state where the ink cartridge 16 is attached to the attachment portion 3530. When the ink cartridge 16 is attached to the attachment portion 3530, first, the case 3510 and the cap side wall 320 abut against the side wall support plate 3540, and the case protrusion 3520 abuts against a slide groove (not shown) of the clamp release member 3543. In contact with the ink cartridge 16, the side wall support plate 3540 is guided. When the mounting operation of the ink cartridge 16 is continued, the cap bottom wall 310 of the cap 300 abuts against the bottom wall receiving plate 3545, and the direction in which the bottom wall receiving plate 3545 is against the biasing force of the biasing member 3542 (mounting direction R ). At this time, the cap bottom wall 310 abuts on the inclined surface 3546 of the clamp member 3543 and the clamp member 3543 is flexed in a direction away from the cap side wall 320 (upward in FIG. 46B). Furthermore, when the ink cartridge 16 is pushed in, the contact between the cap side wall 320 and the inclined surface 3546 of the clamp member 3543 is released, the clamp member 3543 returns to its original state, and engages with the cap side wall 320, and the ink cartridge 16. Is locked.

  As shown in FIG. 46C, the ink cartridge 16 is attached / detached by pushing the clamp release member 3544 in the mounting direction (arrow R direction). Then, the inclined surface 3547 of the clamp releasing member 3544 flexes the inclined surface 3546 of the clamp member 3543 in the direction away from the cap side wall 320, and the engagement between the clamp member 3543 and the cap side wall 320 is released. At this time, the bottom wall receiving plate 3545 is pushed in the opposite mounting direction by the biasing force of the biasing member 3542, and the cap bottom wall 310 is moved to a position where it does not come into contact with the inclined surface 3546 of the clamp member 3543.

  Therefore, when the ink cartridge 16 is mounted, the operation can be performed by pushing the ink cartridge 16 into the mounting portion 3530, and when the ink cartridge 16 is detached from the mounting portion 3530, the operation can be performed by pressing the clamp release member 3544. Therefore, the ink cartridge 16 can be attached and detached with a simple operation.

  Next, the ink cartridge 17 according to the seventeenth embodiment will be described with reference to FIG. FIG. 47 is a diagram schematically illustrating a configuration for detecting ink empty of the ink cartridge 17 according to the seventeenth embodiment.

  As shown in FIG. 47 (a), the frame 3610 of the seventeenth embodiment is configured so that the inclination angles of the frame inclined surfaces 3620 and 3621 are different. The frame inclined surface 3620 side and the frame inclined surface 3621 side are communicated with each other through a frame communication hole 3624. If the inclination angles of the frame inclined surfaces 3620 and 3621 are different, the distance from the frame opening 3622 on the frame inclined surface 3620 side to the frame communication hole 3624 and the distance from the frame opening 3623 on the frame inclined surface 3621 side to the frame communication hole 3624 are shown. The distance is different. Therefore, since the film 3630 on the frame inclined surface 3620 side and the film 3631 on the frame inclined surface 3621 side are different in size, the ink capacity stored on the frame inclined surface 3620 side and the ink capacity stored on the frame inclined surface 3621 side are different. Is different.

  As shown in FIG. 47 (a), a blocking plate 3640 is attached to the film 3630. A part of the case 200 is provided with a connector 3650 that can be electrically connected to the outside when the ink cartridge 17 is attached to an ink jet printer (not shown). A detection sensor 3660 is connected to the connector 3650 through a signal line. The detection sensor 3660 is a sensor for detecting ink empty of the ink cartridge 17 and is a transmissive photosensor having a light emitting part and a light receiving part. Therefore, when the blocking plate 3640 blocks the optical path between the light emitting unit and the light receiving unit of the detection sensor 3660, the detection sensor 3660 is turned on and ink empty is detected.

  FIG. 47A shows a state where the ink I is sufficiently stored in the frame 3610. As shown in FIG. 47A, the blocking plate 3640 is substantially parallel to the frame 3610 and does not block the optical path of the detection sensor 3660.

  In the ink jet printer, when printing is repeatedly performed, the ink I decreases, and the films 3630 and 3631 bend in the directions of the frame inclined surfaces 3620 and 3621, respectively. At this time, since the ink capacity stored on the frame inclined surface 3621 side is small, the ink I on the frame inclined surface 3621 side is used up first, and the film 3631 comes into contact with the frame inclined surface 3621.

  Further, when printing is repeatedly performed in the ink jet printer, the ink on the frame inclined surface 3620 side is also used up, and the film 3630 contacts the frame inclined surface 3620. At this time, the blocking plate 3640 also contacts the frame inclined surface 3620 via the film 3630. This state is the state of FIG. 47B, and since the blocking plate 3640 blocks the optical path of the detection sensor 3660, the detection sensor 3660 detects ink empty.

  As described above, by providing a difference in the inclination angle of the frame inclined surfaces 3620 and 3621, the order in which the films 3630 and 3631 bend when the ink I is used is determined. Therefore, the ink empty can be accurately detected by attaching the blocking plate 3640 to the film 3630 having the larger capacity in which the ink I is stored.

  Next, the ink cartridge 18 of the eighteenth embodiment will be described with reference to FIG. The seventeenth embodiment is configured to accurately detect ink empty by making the inclination angles of the frame inclined surfaces 3620 and 3621 different. On the other hand, the eighteenth embodiment is configured to detect ink empty accurately by making the sizes of the openings of the frame openings 3770 and 3771 different. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 17 of 17th Example, and the description is abbreviate | omitted.

  FIG. 48 is a diagram schematically showing a configuration for detecting ink empty of the ink cartridge 18 of the eighteenth embodiment.

  As shown in FIG. 48 (a), the frame 3710 of the eighteenth embodiment is formed with the same inclination angle with respect to the horizontal plane of the frame inclined surfaces 3720 and 3721 (the opening surface of the frame opening 3770). The sizes of the frame openings 3770 and 3771 formed by the inclined surfaces 3720 and 2721 are different. That is, the diameter of the opening of the frame opening 3770 and the diameter of the opening of the frame opening 3771 are different. Therefore, the film 3730 on the frame inclined surface 3720 (frame opening 3770) side and the film 3731 on the frame inclined surface 3721 (frame opening 3771) side are different. Therefore, the ink capacity stored on the frame inclined surface 3720 (frame opening 3770) side is different from the ink capacity stored on the frame inclined surface 3721 (frame opening 3771) side.

  Therefore, in the inkjet printer, when printing is repeated and the ink I in the frame 3710 decreases, the ink I stored on the frame inclined surface 3721 side disappears first, and then the ink I on the frame inclined surface 3720 side disappears (FIG. 48 (b) state). Since the blocking plate 3640 is attached to the film 3730 on the frame inclined surface 3720 side having a large ink capacity, the ink empty is detected by blocking the optical path of the detection sensor 3660 when the ink I is used up.

  As described above, by providing a difference in the sizes of the openings of the frame openings 3770 and 3771, the order in which the films 3730 and 3731 bend can be determined, so that the ink empty can be accurately detected.

  Next, the ink cartridge 19 of the nineteenth embodiment will be described with reference to FIG. The seventeenth embodiment is configured to accurately detect ink empty by making the inclination angles of the frame inclined surfaces 3620 and 3621 different. On the other hand, in the nineteenth embodiment, the ink empty is accurately detected by making the thicknesses of the films 3830 and 3831 different. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 17 of 17th Example, and the description is abbreviate | omitted.

  FIG. 49 is a diagram schematically showing a configuration for detecting ink empty of the ink cartridge 19 of the nineteenth embodiment.

  In the frame 3810 of the nineteenth embodiment, the inclined angles of the frame inclined surfaces 3820 and 3821 are formed to be the same, and the opening diameters of the frame openings 3870 and 3871 are also formed to be the same. Therefore, the ink capacity stored on the frame inclined surface 3820 (frame opening 3870) side and the ink capacity stored on the frame inclined surface 3821 (frame opening 3871) side are substantially the same. However, the films 3830 and 3831 of the nineteenth embodiment have different thicknesses, and the film 3830 is formed thicker than the film 3831. Accordingly, the film 3830 has higher strength than the film 3831. Therefore, when the ink I decreases, the film 3831 first comes into contact with the frame inclined surface 3821, and then the film 3830 comes into contact with the frame inclined surface 3820. Since the blocking plate 3640 is attached to the thick film 3830, the ink empty is detected by blocking the optical path of the detection sensor 3660 when the ink I is used up.

  As described above, by varying the strength of the films 3830 and 3831, the order in which the ink is used and the films 3730 and 3731 bend can be determined, so that the ink empty can be accurately detected.

  In the seventeenth to nineteenth embodiments, the blocking plate 3640 is attached to the films 3630, 3730, and 3830 that are bent and deformed, so that when the films abut on the frame inclined surfaces 3620, 3720, and 3820, respectively. It is also conceivable that the moving direction of the blocking plate 3640 is deviated from the optical path of the detection sensor 3660. In this case, a guide member that guides the blocking plate 3640 to the optical path of the detection sensor 3660 may be provided. For example, the guide member may be arranged on both sides so as to sandwich the blocking plate 3640 and form a passage to the detection sensor 3660, or a part of the blocking plate 3640 is supported with respect to the frame. You may comprise so that a moving part of the shielding board 3640 may be regulated by providing a support part.

  In the seventeenth to nineteenth embodiments, the ink empty may be detected in combination with a method of calculating the ink empty from the ink discharge amount by a control device (not shown). With this configuration, more accurate ink empty can be detected.

  Further, the detection sensor may be provided on the ink jet printer side. In this configuration, when the ink cartridge 1 is mounted, a part of the case is configured to block the optical path of the detection sensor. A part of the case is formed to be transparent or translucent, and is configured to allow light emitted from the light emitting portion of the detection sensor to pass therethrough. The blocking plate 3640 is attached so as to penetrate into a part of the case and block the optical path of the detection sensor when the ink I runs out. Therefore, ink empty can be accurately detected even with a configuration including a detection sensor on the ink jet printer side. Moreover, since it is not necessary to provide a detection sensor in the case, the cost of the ink cartridge 1 can be reduced.

  In addition, since the ink capacity on each inclined surface side can be changed by changing the size of the film, the amount of pressing the film by the pressing portion is changed in the film welding step (see FIG. 20). Also good. With this configuration, since the film size is different and the ink capacity is different, accurate ink empty can be detected.

  In addition, since the order in which the films bend may be determined, films having the same film thickness and different materials may be welded. With this configuration, since the material is different even if the thickness of the film is the same, the strength of the film is also different. Therefore, since the order in which the films bend is determined, accurate ink empty can be detected.

  Next, the ink cartridge 20 of the twentieth embodiment will be described with reference to FIG. The cap protrusion member 350 of the first embodiment has a flat end surface on the case 200 side. On the other hand, the cap projection member 3910 of the twentieth embodiment has a tapered tip. In addition, the same code | symbol is attached | subjected to the part same as the ink cartridge 1 of 1st Example, and the description is abbreviate | omitted.

  FIG. 50 is an enlarged cross-sectional view showing a welded portion between the case 200 and the cap 300 of the ink cartridge 20 of the twentieth embodiment.

  As shown in FIG. 50A, in the ink cartridge 20 of the twentieth embodiment, the tip of the cap projection member 3910 of the cap member 300 is formed in a tapered shape. Therefore, compared with the case where the tip of the cap protrusion member 3910 is formed in a flat surface, the cap protrusion member 3910 is melted at an early stage, and the molten residue X is likely to flow downward. Therefore, the cap 300 and the case 200 can be welded at an early stage.

  If the inclined surface of the cap protrusion member 3910 is formed so as to incline downward toward the cap side wall 320, the molten residue X when the cap protrusion member 3910 is melted enters the gap between the cap side wall 320 and the case side wall 230. Be guided. Therefore, it is possible to reduce the penetration of the molten residue X into the ink cartridge.

  Next, the ink cartridge 21 of the twenty-first embodiment will be described with reference to FIG. FIG. 51 is a diagram showing a cross section of a part of the ink supply unit 4010 of the ink cartridge 21 of the twenty-first embodiment. The ink cartridge 21 of the twenty-first embodiment is configured so that the ink flow path 4020 is different from the ink cartridge 1 of the first embodiment. Accordingly, the same parts as those of the ink cartridge 1 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 51, the ink flow path 4020 of the ink supply unit 4010 includes a first flow path 4030 formed in a truncated cone shape and a second flow path 4031 formed in a substantially cylindrical shape. The diameter of the two flow paths 4031 is smaller than the minimum diameter of the first flow path 4030. Accordingly, a step surface 4032 is formed between the first flow path 4030 and the second flow path 4031. The step surface 4032 protrudes in a direction orthogonal to the direction in which the filter 4040 is press-fitted.

  When the ink cartridge 21 is manufactured, when a filter 4040 formed in a columnar shape having the same diameter as the maximum diameter of the first flow path 4030 is press-fitted into the ink flow path 4020, the filter 4040 is moved into the ink flow path 4020. It contacts the step surface 4032. Since the diameter of the second flow path 4031 is smaller than the diameter of the first flow path 4030, the stepped surface 4032 acts as a wall surface that stops further entry of the filter 4040 press-fitted into the ink flow path 4020. Therefore, the filter 4040 is not pushed out into the second ink flow path 4031. Therefore, it is possible to prevent the filter 4040 from being pushed into the ink storage unit 120.

  Next, the ink cartridge 22 of the twenty-second embodiment will be described with reference to FIG. FIG. 52 is a diagram showing a cross section of a part of the ink supply 4110 of the ink cartridge 22 of the twenty-second embodiment. The ink cartridge 21 of the twenty-second embodiment is configured so that the ink flow path 4120 is different from the ink cartridge 1 of the first embodiment. Accordingly, the same parts as those of the ink cartridge 1 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 52, the ink channel 4120 of the ink supply unit 4110 is entirely formed in a hollow conical shape, and an ink supply hole 4121 formed at one end of the ink channel 4120 on the ink storage unit 120 side. The opening is formed to be the smallest in the ink flow path 4120. Therefore, even when the filter 4140 is press-fitted into the ink flow path 4120 when the ink cartridge 22 is manufactured, the filter 4140 can be reduced from being pushed out into the ink reservoir 120.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed.

  Therefore, a modification of the slider member, the valve seat member, and the cover member will be described with reference to FIG. FIG. 53 is a plan view of a slider member 4210, a valve seat member 4220, and a cover member 4230 according to a modification. In addition, the same code | symbol is attached | subjected to the part same as the slider member 640 of 1st Example, the valve seat member 660, and the cover member 680, and the description is abbreviate | omitted.

  As shown in FIG. 53A, the slider through-hole 4211 of the slider member 4210 is formed in a substantially rectangular shape when viewed in the direction perpendicular to the paper surface. As shown in FIG. 53 (b), the first valve seat through hole 4221 and the second valve seat through hole 4222 of the valve seat member 4220 are formed in a substantially rectangular shape when viewed in the direction perpendicular to the paper surface. As shown in FIG. 53 (c), the cover through-hole 4231 of the cover member 4230 is formed in a substantially rectangular shape when viewed in the direction perpendicular to the paper surface.

  As described above, each through hole (slider through hole 4211, first valve seat through hole 4221, second valve seat through hole 4222, and cover through hole 4231) serving as an ink flow path is formed in a substantially rectangular shape. The influence of ink bubbles can be reduced. Therefore, by using any one member of the slider member 4210, the valve seat member 4220, and the cover member 4230, it is possible to reduce the influence of ink bubbles and reduce the occurrence of print quality degradation.

  In addition, in the valve mechanism of each embodiment, if the flow path through which the ink flows is rectangular, the influence of the ink bubbles can be further reduced. Moreover, in the said modification, although the hole shape was formed in the rectangle, as long as it is other than a substantially circular shape, it is good also as what comprises a hole shape in a polygon.

  Next, a modification of the joint member will be described with reference to FIG. FIG. 54 is a cross-sectional view of the joint member 3010.

  The joint member 3010 forms an outer peripheral wall of the joint member 3010, and is formed inside the joint outer peripheral portion 3020 that is exposed to the outside of the ink supply portion 140 and inside the joint outer peripheral portion 3020 and inside the ink supply portion 140. The joint inner peripheral portion 3030 to be inserted, and the joint contact portion that protrudes from the upper surface 3031 of the joint inner peripheral portion 3030 to the valve member 620 (see FIG. 19) side (the upper side in FIG. 54B) and contacts the valve member 620. 3040, a first joint groove portion 3050 formed between the joint outer peripheral portion 3020 and the joint inner peripheral portion 3030 and fitted to the outer peripheral wall of the ink supply unit 140, and the joint contact portion 3040 in the joint inner peripheral portion 3030. And a second joint groove portion 3070 formed around the That. The second joint groove portion 3070 opens on the upper surface 3031 of the joint inner peripheral portion 3030, the depth direction is parallel to the axis B, and the bottom surface of the groove is a taper portion channel 3061 and a sealing portion channel 3062 described later. It is almost the same height as the continuous contact.

  The joint member 3010 is formed with an ink flow path 3060 penetrating from the bottom surface 3032 of the joint inner peripheral portion 3030 to the tip end portion 3041 (lower side in FIG. 12D) of the joint contact portion 3040.

  The ink flow path 3060 is parallel to the opening 3033 formed in the bottom surface 3032, the tapered part flow path 3061 defined by the tapered surface 3034 provided continuously with the opening 3033, and the axis B connected to the tapered surface 3034. A substantially hollow columnar sealing portion flow channel 3062 that is defined by the inner peripheral surface 3035 and seals the ink extraction tube 1720, and an inner peripheral surface 3042 of the joint contact portion 3040 that is connected to the inner peripheral surface 3035. It is composed of a defined contact portion flow path 3063.

  When the ink extraction tube 1720 is inserted into the ink flow path 3060 of the joint member 3010, the outer peripheral surface of the ink extraction interval 1720 elastically contacts the inner peripheral surface 3035 of the sealing flow path 3062. Then, the inner peripheral surface 3035 is dragged by the ink extraction tube 1720 due to friction on the contact surface and tries to be displaced in the insertion direction, and this is also transmitted to the joint contact portion 3040. However, since the joint contact portion 3040 is easily bent in the direction away from the axis B by the second joint groove portion 3070 formed around the joint contact portion 3040, the joint contact portion 3040 is directed toward the second joint groove portion 3070 (see FIG. 54 (b) Displacement to fall in the direction of arrow Q). Therefore, since the joint contact portion 3040 is hardly lifted toward the valve member 620, the valve member 620 and the joint contact portion 3040 are separated early to form an ink flow path. Therefore, the stroke when the ink cartridge is mounted can be shortened.

  Next, a modification of the valve member will be described with reference to FIG. FIG. 55 is a view showing a cross section of a valve mechanism 3110 of a modified example.

  As shown in FIG. 55, the valve mechanism 3110 includes a first spring member 630, a slider member 640, a second spring member 650, a valve seat member 660, a check valve 670, a cover member 680, as in the first embodiment. It has. Further, the valve mechanism 3110 includes a joint member 3120 and a valve member 3140.

  The joint member 3120 of the valve mechanism 3110 forms an outer peripheral wall of the joint member 3120, and forms a joint outer peripheral portion 3130 exposed to the outside of the ink supply portion 140, and an inner peripheral portion of the joint outer peripheral portion 3130 and an ink supply portion. A joint inner peripheral portion 3131 inserted into the inner portion of 140, a joint groove portion 3132 formed between the joint inner peripheral portion 3131 and the joint outer peripheral portion 3130, and into which the outer peripheral wall of the ink supply portion 140 is fitted; And an ink flow path 3133 formed at the center of the inner periphery 3131.

  Similar to the first embodiment, the valve member 3140 includes a valve bottom wall 810 that forms the bottom surface of the valve member 3140, a valve outer wall 820 that forms the outer peripheral wall of the valve member 3140, and a slider loose insertion member 1030. A valve guide groove 830, a valve restricting portion 840 that restricts movement of the slider member 640, and a valve hook portion 850 that engages with the slider member 640. Further, a valve protrusion 3150 protruding in the direction of the joint member 3120 is formed on the valve bottom wall 810. The valve protrusion 3150 is formed so as to surround the ink flow path 3133 of the joint member 3120, and the ink flow path is blocked by contacting the joint member 3120.

  When the ink extraction tube 1720 (see FIG. 26) is inserted through the joint member 3120, the valve member 3140 is lifted to the valve seat member 660 side (upper side in FIG. 54 (a)). Accordingly, the valve protrusion 3150 and the joint member 3120 are separated early to form the ink flow path. Therefore, the stroke when the ink cartridge is mounted can be shortened.

  As described above with reference to FIGS. 54 and 55, the joint member and the valve member come into contact with each other to block the ink flow path, and when the ink extraction pipe 1720 is inserted, the joint member and the valve member are As long as the ink flow path is formed at an early stage away from each other, either the structure in which the protrusion is formed on the joint member side or the structure in which the protrusion is formed on the valve member side may be used.

  Here, other modifications will be described. For example, in each of the above embodiments, the cap 300 includes the cap side wall 320, but the cap side wall 320 may be omitted. In this configuration, it is assumed that an engaging portion for fixing to the mounting portion of the inkjet printer 1710 (see FIG. 26) is formed on the cap side wall 320 or the case side wall 230.

  Further, in the valve member 1930 of the third to seventh embodiments, the ink flow path is the valve through hole 1950, but the shape of the valve through hole 1950 may be a quadrangle in a top view. Further, the stopper through-hole 2180 of the filter stopper member 2170 of the fifth embodiment may be formed in a square shape when viewed from above. With this configuration, it is possible to reduce the blockage of the ink flow path due to the ink bubbles.

  In the first to fourth and sixth to twenty-second embodiments, the cover member 680 and the valve seat member 660 are fitted to the fitting portion 1450. However, the cover member 680, the check valve 670, and the valve It is good also as a structure provided with the filter stopper member 2170 of 5th Example, without providing the seat member 660. FIG.

  In the third to seventh, ninth, eleventh, and twelfth embodiments, the valve seat member 660 having the same shape as that of the first embodiment is provided. However, each spring member contacts the valve seat bottom 1110. Even if they come into contact with each other, the flow path of the second valve seat through hole 1150 is not blocked, so that a valve seat member in which the valve seat communication groove 1160 is not formed may be used.

  Further, the configuration in which the cap has a cap side wall and the molten residue with the case cannot be visually recognized from the outside is applied to a configuration in which a cap and a case are provided and the cap and the case are thermally welded in addition to the ink cartridge. be able to.

  Although various configurations have been described based on the ink cartridge 1 to the ink cartridge 22 from the first to the twenty-second embodiments and modifications, the ink cartridge may be configured by combining the various configurations.

  Hereinafter, a modified example of the ink cartridge of the present invention, a frame included in the ink cartridge, a method for manufacturing the ink cartridge, and a modified example of the resin casing will be described.

  An ink cartridge that has an ink storage chamber for storing ink and is detachably attached to an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head. The ink cartridge comprising: an insertion port into which the hollow ink extraction member provided is inserted; an opening / closing valve for opening / closing the insertion port; and a biasing member for biasing the opening / closing valve toward the insertion port. Is not attached to the ink jet recording apparatus, the opening / closing valve is urged to the insertion port by the urging member to be closed, thereby preventing ink leakage from the ink storage chamber, while the ink cartridge Is attached to the ink jet recording apparatus, the ink extraction member is inserted from the insertion opening along with the attachment. As a result, the opening / closing valve is separated from the insertion port against the urging force of the urging member, and an ink supply path between the ink storage chamber and the recording head communicates to supply ink to the recording head. The ink is characterized in that it is in an open state, and the biasing member is formed in a hollow shape by a combustible elastic material, and the hollow portion constitutes a part of the ink supply path. Cartridge A1.

  The ink cartridge A1 includes a frame body having a space serving as the ink storage chamber, and a cylinder body that is provided in the frame body and communicates with the ink storage chamber. The cylinder body has the insertion opening at one end. And an open / close valve unit including the open / close valve and the urging member is mounted therein.

  In the ink cartridge A1 or A2, the biasing member includes a pressing portion that presses the opening / closing valve, a bent portion connected to the pressing portion, and a starting point of biasing of the biasing member connected to the bent portion. The ink cartridge A3 is characterized in that the bent portion is configured with lower strength than the pressing portion and the base portion.

  In the ink cartridge A3, the bent portion of the urging member is formed thin with respect to the pressing portion and the base portion, and is configured to have lower strength than the pressing portion and the base portion. .

  In the ink cartridge A3 or A4, the pressing portion and the base portion of the urging member are formed in parallel with the urging direction of the urging member, while the bent portion of the urging member is the urging force of the urging member. The ink cartridge A5 is characterized in that the bent portion has a lower strength than the pressing portion and the base portion by being formed obliquely with a predetermined angle with respect to the direction.

  In any one of the ink cartridges A3 to A5, the urging member is formed in a hollow shape whose opening amount increases from the pressing portion toward the base portion.

  In any one of the ink cartridges A3 to A6, the two urging members are provided, and these two urging members are arranged in the urging direction of the urging member while being in contact with each other and orthogonal to the urging direction. An ink cartridge A7, which is disposed symmetrically with respect to the direction in which the ink cartridge is to be moved.

  One of the ink cartridges A1 to A7 has an accommodation chamber in which the urging member is accommodated, and a maximum width portion of the urging member is in contact with an inner wall of the accommodation chamber. Cartridge A8.

  An ink cartridge that has an ink storage chamber for storing ink and is detachably mounted on an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head, and communicates with the ink storage chamber And an ink channel chamber serving as an ink channel for supplying the ink in the ink storage chamber to the outside, and an ink outlet protruding from the ink jet recording apparatus. An insertion port into which a hollow ink extraction member for extracting water is inserted, an opening / closing valve for opening / closing the insertion port, and a biasing member for biasing the opening / closing valve toward the insertion port The biasing member includes a pressing portion that presses the opening / closing valve, a bent portion that is connected to the pressing portion, and a base that is connected to the bent portion and serves as a starting point of the biasing member. The bent portion is configured to have a lower strength than the pressing portion and the base portion, and is provided on an outer periphery of the biasing member. The ink extraction member is inserted into the insertion port, and the bent portion of the biasing member is provided. The ink cartridge B1 includes a slider that slides in the ink channel chamber in a counter-biasing direction of the biasing member in accordance with the flexing of the ink channel chamber.

  In the ink cartridge B1, the ink flow path chamber houses the opening / closing valve, the biasing member, and the slider, and the slider has a predetermined length in the counter-biasing direction of the biasing member. In the ink channel chamber, the ink extraction member is inserted into the insertion port, and the bending portion of the biasing member is bent, so that the slider moves inside the ink channel chamber. When the slider slides in the counter-biasing direction, a slider that slides by a predetermined amount comes into contact, and an ink cartridge B2 is provided that restricts the sliding of the slider thereafter. .

  In the ink cartridge B1 or B2, the two urging members are provided, and the bottom portions of the two urging members are disposed inside the slider so as to face each other, and the slider is configured to support the two urging members. A cylindrical portion provided on the outer periphery of the member; and an engaging portion that engages with bottom surfaces of the two urging members formed on the inner wall of the cylindrical portion. An ink cartridge B3 that is sandwiched by a biasing member and slides in the ink flow path chamber according to the deflection of the biasing member.

  In the ink cartridge B3, an outer peripheral surface of the bottom surface portion of the two urging members is in contact with an inner wall of the cylindrical portion of the slider.

  In any of the ink cartridges B1 to B4, in a state where the opening / closing valve is urged toward the insertion port by the urging member to close the insertion port, a part of the bent portion of the urging member The ink cartridge B5 is provided with a bending forming member that bends a certain amount in advance.

  In the ink cartridge B5, the bend forming member is formed of the two urging members in a state where the opening / closing valve is urged toward the insertion port by the urging member and the insertion port is closed. An ink cartridge B6, wherein one biasing member that presses the opening / closing valve is bent slightly in advance.

  In the ink cartridge B6, the deflection forming member has a standing wall provided on the open / close valve and disposed outside the slider, and a hook portion provided on the standing wall. In the state where the opening / closing valve is urged toward the insertion port by the urging member and the insertion port is closed, the one urging member is engaged with the slider while being bent. There is an ink cartridge B7.

  In the ink cartridge B7, the hook portion engages with a surface with which the bottom surface portion of the other biasing member that does not press the open / close valve of the engagement portion abuts.

  In any one of the ink cartridges B1 to B8, the biasing member is formed in a hollow truncated cone shape whose top and bottom are open, and the hollow interior is an ink flow path. Ink cartridge B9.

  The ink cartridge B10 according to any one of the ink cartridges B1 to B9, wherein the urging member is formed of a combustible elastic material.

  One of the ink cartridges B1 to B10 includes a frame body having a space serving as the ink storage chamber, and the ink flow path chamber is configured as a cylindrical body that is provided in the frame body and communicates with the ink storage chamber. The ink cartridge B11 is characterized in that an open / close valve unit including the open / close valve, the urging member, and the slider is mounted inside the cylinder.

  An ink cartridge that has an ink storage chamber for storing ink and is detachably mounted on an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head, and communicates with the ink storage chamber And an ink channel chamber serving as an ink channel when the ink in the ink storage chamber is supplied to the outside, and an ink mounted on the ink outlet of the ink channel chamber and protruding from the ink jet recording apparatus An insertion port forming member for forming an insertion port into which a hollow ink extraction member for extracting the ink is inserted, an opening / closing valve for opening / closing the insertion port formed by the insertion port forming member, and the opening / closing valve A biasing member that biases the insertion port forming member to close the insertion port, and the insertion port of the insertion port forming member is contracted toward the opening / closing valve side. The tapered portion is connected to the small diameter side of the tapered portion and is formed to have a smaller diameter than the outer diameter of the ink extraction member. When the ink extraction member is inserted, it is in close contact with the periphery of the ink extraction member. A sealing portion that seals the periphery, and a countersunk portion that is connected to the sealing portion and has a diameter larger than the outer diameter of the ink extraction member. The ink cartridge C1 is characterized in that a protrusion is formed to close the insertion port in close contact with the open / close valve when the ink extraction member is not inserted.

  An ink cartridge that has an ink storage chamber for storing ink and is detachably mounted on an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head, and communicates with the ink storage chamber And an ink channel chamber serving as an ink channel when the ink in the ink storage chamber is supplied to the outside, and an ink mounted on the ink outlet of the ink channel chamber and protruding from the ink jet recording apparatus An insertion port forming member for forming an insertion port into which a hollow ink extraction member for extracting the ink is inserted, an opening / closing valve for opening / closing the insertion port formed by the insertion port forming member, and the opening / closing valve A biasing member that biases the insertion port forming member to close the insertion port, and the insertion port of the insertion port forming member is contracted toward the opening / closing valve side. The tapered portion is connected to the small diameter side of the tapered portion and is formed to have a smaller diameter than the outer diameter of the ink extraction member. When the ink extraction member is inserted, it is in close contact with the periphery of the ink extraction member. And a sealing portion that seals the periphery, and a protrusion that closes the insertion port in close contact with the open / close valve when the ink extraction member is not inserted around the sealing portion. The ink cartridge C2 is characterized in that a protrusion is provided and a groove for increasing the flexibility of the protrusion is provided in the outer periphery of the protrusion.

  In the ink cartridge C1 or C2, the insertion port forming member is made of a flammable elastic material.

  An ink cartridge that has an ink storage chamber for storing ink and is detachably mounted on an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head, and communicates with the ink storage chamber And an ink channel chamber serving as an ink channel for supplying the ink in the ink storage chamber to the outside, and an ink outlet protruding from the ink jet recording apparatus. An insertion opening into which a hollow ink extraction member for extracting the ink is inserted, and at least a portion of the ink flow path from the ink storage chamber to the insertion opening of the ink flow path chamber has a minimum cross-sectional area. An ink cartridge D1 having a polygonal shape.

  In the ink cartridge D1, an opening / closing valve for opening / closing the insertion port and an urging member for urging the opening / closing valve in a direction to close the insertion port are provided in the ink channel chamber. Characteristic ink cartridge D2.

  In the ink cartridge D2, the ink flow path chamber is provided on one side of the biasing member and on the opposite side of the opening / closing valve, and the ink that has flowed into the ink extraction member flows back into the ink storage chamber. And a check valve case that accommodates the check valve and has a hole that forms a part of an ink flow path that is opened or closed by the check valve. The ink cartridge D3 is characterized in that at least a portion having a minimum cross-sectional area of the ink flow path formed in the check valve case is formed in a polygonal shape.

  In any one of the ink cartridges D1 to D3, the urging member is made of a flammable elastic member, is provided in the ink flow path chamber, and is formed in a hollow shape having an upper end and a lower end opened. The ink cartridge D4 is characterized in that the inside of the shape is an ink flow path, and the portion having the smallest cross-sectional area of the ink flow path is formed in a polygonal shape.

  In the ink cartridge D4, the biasing member has two elastic members having a hollow conical shape or a bowl shape, and is configured by combining the bottom surfaces of the elastic members to face each other. An ink cartridge D5 having a polygonal shape.

  In the ink cartridge D4 or D5, the elastic member is a pressing portion that presses the opening / closing valve, a bent portion that is connected to the pressing portion, and a starting point of biasing of the biasing member that is connected to the bent portion. And the bent portion is configured with lower strength than the pressing portion and the base portion, and the smaller one of the openings formed in the pressing portion and the base portion is formed in a polygonal shape. An ink cartridge D6.

  In the ink cartridge D6, the bent portion of the urging member is formed thinner than the pressing portion and the base portion.

  The ink cartridge D8 according to any one of the ink cartridges D1 to D7, wherein the polygonal ink flow path is formed in a square shape.

  An ink cartridge that has an ink storage chamber for storing ink and is detachably mounted on an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head, and communicates with the ink storage chamber And an ink channel chamber serving as an ink channel for supplying the ink in the ink storage chamber to the outside, and an ink outlet protruding from the ink jet recording apparatus. An insertion port into which a hollow ink extraction member for extracting the ink is inserted, and dust and foreign matter disposed between the insertion port and the ink storage chamber and mixed in the ink stored in the ink storage chamber And a filter housing chamber that houses the filter and has an inner wall whose opening is enlarged from one side to the other at least in part. For example, the filter, the ink cartridges E1 to together formed as a columnar body, wherein said at being pushed into the filter housing chamber that is attached to the filter accommodation chamber.

  In the ink cartridge E1, at least a part of the inner wall of the filter housing chamber is formed in a mortar shape, and the amount of opening of the mortar-shaped portion increases from one side to the other. .

  In the ink cartridge E1, the inner wall of the filter housing chamber is constituted by a hollow conical portion whose opening amount is enlarged from one side to the other, and a hollow cylindrical portion continuously provided on the maximum diameter side of the hollow conical portion. The ink cartridge E3 is characterized in that the filter before being pushed into the filter housing chamber is formed in a columnar shape having the same cross-sectional shape as that of the hollow cylindrical portion of the filter housing chamber.

  In any one of the ink cartridges E1 to E3, one end of the filter storage chamber communicates with the ink storage chamber side, and one end thereof is formed to have the smallest diameter in the filter storage chamber. An ink cartridge E4 which is pushed into the filter housing chamber from the insertion port side and is mounted in the filter housing chamber.

  One of the ink cartridges E1 to E3 is characterized in that an entrance stop portion is formed at one end on the small diameter side of the filter housing chamber to stop further entry of the filter pushed into the filter housing chamber. Ink cartridge E5.

  In the ink cartridge E5, the entry stop portion is a wall surface protruding in a direction intersecting with the entry direction of the filter.

  The ink cartridge E7 according to any one of the ink cartridges E1 to E6, further comprising a frame body having a space serving as the ink storage chamber, wherein the filter housing chamber is formed in a part of the frame body.

  In any one of the ink cartridges E1 to E7, an opening / closing valve for opening / closing the insertion port, a biasing member for biasing the opening / closing valve toward the insertion port, and one side of the biasing member, A check valve provided on the opposite side of the on-off valve for preventing the ink flowing into the ink extraction member from flowing back into the ink storage chamber; and a check valve case for containing or holding the check valve; And the check valve case is configured to press one end of the filter into the filter housing chamber so that the filter does not come out of the filter housing chamber.

  The ink cartridge E9 according to any one of the ink cartridges E1 to E8, wherein the filter is a foam filter.

  In the ink cartridge E9, the material of the foam of the filter is made of urethane, and the ink cartridge E10.

  An ink cartridge that has an ink storage chamber for storing ink and is detachably mounted on an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head, and communicates with the ink storage chamber An ink channel chamber serving as an ink channel for supplying ink in the ink storage chamber to the outside, and an ink outlet in the ink channel chamber, the ink projecting from the ink jet recording apparatus. An insertion port into which a hollow ink extraction member for extraction is inserted, an opening / closing valve for opening / closing the insertion port, and a biasing member for biasing the opening / closing valve toward the insertion port, The urging member includes a coil spring, and all or at least a part of the biasing member is a conical coil spring wound in a conical shape. Tsu di F1.

  In the ink cartridge F1, the conical coil spring is configured such that a cone inclination angle is set so that the coil spring lines do not interfere with each other during compression.

  In the ink cartridge F1, the diameter of the conical coil spring is smaller than the width of the wire material of the coil spring for each pitch.

  In the ink cartridge F1, the inner diameter of the nth pitch of the conical coil spring is formed to be larger than the outer diameter of the (n + 1) th pitch having a smaller diameter than that of the ink cartridge F4 (where n is a natural number) Is).

  In any one of the ink cartridges F1 to F4, one end of the conical coil spring is engaged with the ink channel chamber, the other end is engaged with the opening / closing valve, and the conical coil spring is formed with a small diameter on the opening / closing valve side. An ink cartridge F5.

  An ink cartridge that has an ink storage chamber for storing ink and is detachably mounted on an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head, and communicates with the ink storage chamber And an ink channel chamber serving as an ink channel for supplying the ink in the ink storage chamber to the outside, and an ink outlet protruding from the ink jet recording apparatus. And an insertion port into which a hollow ink extraction member for extracting the ink is inserted, and the ink storage chamber is welded to the frame, and the pair of opening surfaces of the frame are closed. A pair of films, and the frame is connected to the pair of opening surfaces, and the pair of films is dissolved in the frame. A pair of flanges as the receiving surface as it is, is formed between the pair of flanges, the ink cartridge G1, characterized in that a reinforcing member for connecting the pair of flanges are formed.

  In the ink cartridge G1, a welded portion to which the film is welded is formed around the opening surface of the frame, and the flange extends to the outside of the welded portion. .

  In the ink cartridge G1 or G2, the ink flow path chamber is formed as a cylindrical body connected to the ink storage chamber, and the cylindrical body is formed between the pair of flanges. An ink cartridge G3 which is connected to a flange and functions as the reinforcing member.

  In the ink cartridge G3, the frame is integrally formed by injection molding with a resin material, and the reinforcing member includes a plurality of first reinforcing ribs extending in the same direction as the cylindrical body. An ink cartridge G4.

  In the ink cartridge G4, the reinforcing member includes a second reinforcing rib extending in a direction orthogonal to the cylindrical body and the first reinforcing rib.

  In the ink cartridge G5, the second reinforcing rib is formed on each side of the frame one by one.

  In the ink cartridge G5, the second reinforcing rib is formed on each of the left and right sides of the frame, and a plurality of the first reinforcing ribs are formed on the upper and lower sides of the frame. Cartridge G7.

  In any one of the ink cartridges G4 to G7, the first reinforcing rib is formed with an eject pin receiving portion for pushing out the frame from the mold when the frame after molding is removed from the mold. An ink cartridge G8.

  One of the ink cartridges G1 to G8 includes an outer case that constitutes the ink storage chamber and accommodates the frame on which the pair of films are welded, the ink flow path chamber, the biasing member, and the opening / closing valve. The ink cartridge G9 has a double structure of an outer case and a frame on which the pair of films are welded.

  In a frame enclosed in an ink cartridge that supplies ink to an inkjet recording apparatus and is detachably attached to the inkjet recording apparatus, a peripheral wall portion that forms a peripheral wall of an ink storage chamber for storing ink, and an inner side of the peripheral wall portion A pair of welded portions to which a pair of films for forming an ink storage chamber together with the peripheral wall portion are closed by closing the through holes formed in the front and back surfaces, respectively, and extending outside the pair of welded portions, respectively And a pair of flanges serving as receiving surfaces when the pair of films are welded, and a reinforcing member formed between the pair of flanges and connecting the pair of flanges. A frame G10 included in the ink cartridge.

  In an ink cartridge comprising an ink reservoir that stores ink and a housing that encloses the ink reservoir, the ink reservoir includes a first opening formed on a first surface, and the first opening. A frame member having a first recess serving as an ink storage chamber for storing ink continuously formed in the opening, and an ink supply unit communicating with the first recess and supplying ink to the outside; A first film that closes the first opening, and the first film is welded to a first annular band region surrounding the first opening on the first surface. An ink cartridge H1 having a region and a first displacement region inside the first annular welding region, wherein the first displacement region is not subjected to rolling deformation.

  In the ink cartridge H1, an ink is characterized in that an inner surface of the first recess that is continuous from the first opening is a first inclined surface that gradually approaches the center side of the first opening. Cartridge H2.

  The ink cartridge H3, wherein the first inclined surface is linearly inclined in the ink cartridge H2.

  The ink cartridge H4 according to any one of the ink cartridges H1 to H3, wherein the first opening is formed in a circular shape.

  In the ink cartridge H4, an angle formed between the first surface and the first inclined surface is in a range of 28 degrees to 34 degrees.

  In the ink cartridge H4, an angle formed between the first surface and the first inclined surface is approximately 30 degrees.

  In any one of the ink cartridges H1 to H6, the displacement region of the first film is positioned so as to be in contact with the first inclined surface in a state before ink is injected into the ink storage chamber. An ink cartridge H7.

  In any one of the ink cartridges H1 to H7, the first annular band region is formed by a first protrusion protruding from the other region of the first surface. .

  In the ink cartridge H8, the first protrusion is formed at a predetermined distance from the first opening.

  In any one of the ink cartridges H1 to H9, the ink reservoir includes a second opening in which the frame member is formed on a second surface parallel to the first surface, and the second opening. A second recess serving as an ink storage chamber for storing the ink formed, and a bottom portion of the first recess and the second recess formed between the first surface and the second surface. And further comprising a second film that closes the second opening, and the second film has the second opening on the second surface. A second annular weld region that is welded to the surrounding second annular belt region; and a second displacement region that is inside the second annular weld region, wherein the second displacement region is rolled. Ink cartridge characterized by not being deformed 10.

  In the ink cartridge H10, the inner surface of the second recess continuing from the second opening is a second inclined surface gradually approaching the center side of the second opening. Cartridge H11.

  The ink cartridge H12, wherein the second inclined surface is linearly inclined in the ink cartridge H11.

  The ink cartridge H13 according to any one of the ink cartridges H10 to H12, wherein the second opening is formed in a circular shape.

  In the ink cartridge H13, an angle formed between the second surface and the second inclined surface is in a range of 28 degrees to 34 degrees.

  In the ink cartridge H13, an angle formed between the second surface and the second inclined surface is about 30 degrees.

  In any one of the ink cartridges H10 to H15, the displacement region of the second film is positioned so as to contact the second inclined surface in a state before ink is injected into the ink storage chamber. Ink cartridge H16.

  In any one of the ink cartridges H10 to H16, the second annular band region is formed by a second protrusion protruding from the other region of the second surface. H17.

  In the ink cartridge H17, the second protrusion is formed at a predetermined distance from the second opening.

  In any one of the ink cartridges H11 to H18, the frame member includes a first collar portion formed in a plate shape having the first surface and a second shape formed in a plate shape having the second surface. An ink injection portion having an ink injection path formed between the first flange portion and the first and second flange portions, and a hole communicating the ink injection path and the ink storage chamber; An ink cartridge H19, wherein a plug member having elasticity is press-fitted inside.

  In the ink cartridge H19, the first and second recesses have first and second outer surfaces inclined substantially along the first and second inclined surfaces serving as inner surfaces thereof, and the ink The inner space of the injection path has a shape whose back is tapered by the first and second outer surfaces, and the plug member is in the press-fitting direction so as to substantially coincide with the inner space of the ink injection path. The ink cartridge H20 is characterized in that the tip has a tapered shape.

In a method of manufacturing an ink cartridge including an ink reservoir that stores ink and a casing that encloses the ink reservoir, a first opening formed in a first surface and a first opening that is continuous with the first opening. And a first recess having a first inclined surface that is gradually close to the center side of the first opening, and an ink injection portion that communicates with the first recess and injects ink from the outside. A frame member forming step of forming a frame member having a first film installation step, a first film installation step of installing a thin film-like first film on the first surface, and substantially the same as the entire area of the first inclined surface. A first film pressing step of pressing a mold member formed in a convex shape having a pressing inclined surface against the first recess across the first film; and the first film, A first ring surrounding the first opening of a surface A first film deposition step of welded to strip regions,
An ink cartridge manufacturing method H21 comprising an ink injection step of injecting ink from the ink injection portion into a space formed by the first film and the first recess.

  In a method of manufacturing an ink cartridge including an ink reservoir that stores ink and a casing that encloses the ink reservoir, a first opening formed in a first surface and a first opening that is continuous with the first opening. And a second recess formed in a second surface parallel to the first surface, and a first recess having a first inclined surface gradually approaching the center side of the first opening. A second recess having a second inclined surface that is formed continuously with the second opening and gradually approaches the center side of the second opening, the bottom of the first recess, and the second A frame member forming step of forming a frame member having a communication hole that communicates with the bottom of the recess, and an ink injection portion that communicates with the first and second recesses to inject ink from the outside; The first film is installed on the first surface of the first film The first film presses the mold member formed in a convex shape having a pressing inclined surface substantially coinciding with the entire area of the first inclined surface to the first concave portion with the first film interposed therebetween. A pressing step, a first film welding step of welding the first film to a first annular band region surrounding the first opening of the first surface, and a thin film-like second film A second film installation step of installing the second film on the second surface, and a mold member formed in a convex shape having a pressing inclined surface substantially coinciding with the entire area of the second inclined surface. A second film pressing step for pressing the second film with the second film sandwiched therebetween, and the second film is welded to a second annular band region surrounding the second opening of the second surface. A second film welding step, the first and second films and the first Beauty second manufacturing method of the ink cartridge, characterized by comprising an ink injection step for injecting ink from the ink injection portion to the space formed by the recess H22.

  In the ink cartridge manufacturing method H21 or H22, in the first film pressing step, the first film is pressed by the mold member so as to enter the second recess through the communication hole. Ink cartridge manufacturing method H23 as a feature.

  In the ink cartridge manufacturing method H22, in the second film pressing step, the second film is pressed by the mold member so as to enter the first recess through the communication hole. Manufacturing method H24 of the ink cartridge.

  A housing body having a side wall standing on the periphery of one wall portion and having an opening defined by an end portion of the side wall on the side opposite to the one wall surface, and welding to the end portion of the side wall by ultrasonic welding And an ink cartridge for supplying ink stored therein to the recording apparatus when the recording apparatus is mounted, wherein an end of the side wall is partially missing. The lid has a main wall part wider than the opening, a peripheral wall part standing from the outer peripheral edge of the main wall part and positioned outside the side wall, and the inner side of the peripheral wall part. And a projection that is erected from the main wall portion and located at the missing portion, and a gap is formed between the side wall and the peripheral wall portion into which a burr that flows out when the end portion is melted flows. An ink cartridge I1.

  In the ink cartridge I1, the missing portion is constituted by a first opening end surface formed on the outer peripheral side and a second opening end surface lower than the first opening end surface formed on the inner peripheral side at the end portion of the side wall. The ink cartridge I2 is characterized in that a step is formed, and the protrusion has a tapered shape whose tip is in contact with the end surface of the second opening.

  In the ink cartridge I1 or I2, the protrusion is formed in a ring shape corresponding to the opening.

  In any one of the ink cartridges I1 to I3, the recording apparatus includes an engaging unit that engages with the mounted ink cartridge and positions the ink cartridge at a mounting position. The ink cartridge I4 is characterized in that a tip is an engaged portion engaged with the fixing means.

  The ink cartridge I5 according to any one of the ink cartridges I1 to I4, wherein the casing body and the lid are made of a resin material.

  A housing body made of a resin material having a side wall standing on the periphery of the one wall portion and having an opening defined by the end portion of the side wall on the opposite side of the one wall surface; and over the end portion of the side wall In a resin housing case provided with a lid made of a resin material that is welded by sonic welding and closes the opening, the end of the side wall of the housing body has a partially missing portion, The lid body has a main wall portion wider than the opening, a peripheral wall portion standing from the outer peripheral edge of the main wall portion and positioned outside the side wall, and standing from the main wall portion inside the peripheral wall portion. And a gap into which a burr that flows out when the end portion is melted is formed between the side wall and the peripheral wall portion. Resin housing.

  An ink cartridge comprising a housing and an ink reservoir housed in the housing, wherein the ink cartridge supplies ink stored in the ink reservoir to the recording device when the ink cartridge is attached to the recording device. The reservoir includes an ink storage chamber forming portion that forms an ink storage chamber, and an ink supply portion that protrudes from the ink storage chamber formation portion and has an ink supply path for supplying ink. An ink supply hole for allowing the ink supplied through the ink supply part to flow outside, and a protruding member protruding toward the inside of the housing from a wall part opposite to the ink supply hole; The ink supply part is coupled to a position corresponding to the ink supply hole of the casing, and a portion on the opposite side to the ink supply part is joined to the protruding member, thereby Ink cartridge J1, characterized in that it is supported in suspension in the interior of the body.

  In the ink cartridge J1, the casing includes a casing main body having an opening communicating with the inside, and a lid that closes the opening and has the ink supply hole formed therein. An ink cartridge J2 that is coupled to a lid.

  In the ink cartridge J2, the ink supply section and the lid body are coupled to each other through a seal member having elasticity and having a through hole serving as an ink flow path. .

  The ink cartridge J4 according to any one of the ink cartridges J1 to J3, wherein the ink reservoir is configured such that a portion joined to the protruding member on the side opposite to the ink supply unit has elasticity.

  In any one of the ink cartridges J1 to J3, the ink reservoir includes a recess formed on the side opposite to the ink supply unit, and the recess is configured such that at least a part thereof has elasticity, The ink cartridge J5 is characterized in that the protruding member enters only the concave portion and comes into contact with only the elastic portion of the concave portion.

  In any one of the ink cartridges J1 to J3, the ink reservoir includes an ink injection portion having an ink injection path formed on the side opposite to the ink supply portion, and the ink injection portion includes the inflow channel. An ink cartridge J6, wherein a plug member having elasticity to be sealed is press-fitted, and the protruding member enters the inside of the ink injection portion and contacts only the plug member.

  In the ink cartridge J6, the ink injection part is formed so as to protrude from the ink storage chamber forming part of the ink storage body.

  A first wall portion having an ink supply hole, a second wall portion disposed substantially parallel to the first wall portion at a predetermined interval, a peripheral edge of the second wall portion, and the first wall portion. A housing having a side wall connecting the peripheral edge and formed in a hollow box shape; and an ink storage body having an ink storage chamber stored in the housing for storing ink; and detachably attached to the recording apparatus In the mounted ink cartridge, the ink reservoir includes an ink supply section that forms an ink supply path from the ink reservoir chamber toward the ink supply hole, and the ink reservoir chamber is circular when viewed from a predetermined direction. Alternatively, the ink supply unit is formed in an oval shape so that the central axis of the ink supply unit does not overlap with a virtual center line that passes through the center of the ink storage chamber and is orthogonal to the first wall portion when viewed from the predetermined direction. It is characterized by being formed That ink cartridge K1.

  In the ink cartridge K1, an ink cartridge K2 is characterized in that a center axis of the ink supply path is parallel to the virtual center line.

  In the ink cartridge K2, the ink reservoir includes an ink injection part that forms an ink injection path from the ink storage chamber toward the second wall, and the center axis of the ink injection path is the virtual center line. An ink cartridge K3 is formed so as not to overlap with the ink cartridge K3.

  In the ink cartridge K3, the center axis of the ink injection path is parallel to the virtual center line.

  In the ink cartridge K4, the center axis of the ink supply path and the center axis of the ink injection path are located on opposite sides of the virtual center line.

  In any of the ink cartridges K1 to K5, the ink reservoir includes a main body having an opening that is circular or elliptical when viewed from the predetermined direction and an internal space that communicates with the opening, and the main body And an ink cartridge K6, wherein the ink cartridge K6 is provided with a film that is fixed to the opening and closes the opening.

  In any one of the ink cartridges K1 to K6, the predetermined direction is a direction substantially parallel to the first wall portion.

  The ink cartridge K8 according to any one of the ink cartridges K1 to K7, wherein the casing is formed in a rectangular parallelepiped shape.

  A cartridge housing comprising a housing having an opening and a lid that closes the opening, and an ink reservoir housed inside the cartridge housing, the ink reservoir when mounted on a recording apparatus An ink cartridge that supplies stored ink to a recording apparatus, wherein the ink storage body includes an ink storage chamber forming portion that forms an ink storage chamber, and an ink supply path that protrudes from the ink storage chamber forming portion and supplies ink An ink supply portion that forms a portion of the ink supply chamber and a regulated portion that protrudes substantially parallel to the ink supply portion from the ink storage chamber formation portion toward the same side as the ink supply portion. An ink supply hole for allowing the ink supplied through the portion to flow out to the outside, and a joint portion standing from the periphery of the ink supply hole on the inner surface of the lid and joining the ink supply portion A rotation restricting portion erected from the inner surface so as to be substantially parallel to the joint portion, and the rotation restricting portion abuts on the restricted portion, whereby the ink reservoir with respect to the lid body An ink cartridge L1 that restricts rotational movement about a joint.

  In the ink cartridge L1, the ink supply portion and the joint portion are each formed in a cylindrical shape, and the ink supply portion engages with each other in a state of being inserted into the joint portion.

  In the ink cartridge L2, an elastic seal member in which a through hole serving as an ink flow path is formed is inserted inside the joint portion, and the seal member is connected to the ink supply portion and the joint portion. The ink cartridge L3 is sandwiched between the inner surface of the lid and the tip of the ink supply portion when the two are engaged.

  In any one of the ink cartridges L1 to L3, the rotation restricting portion includes a pair of rotation restricting members standing substantially parallel to each other, and the restricted portion is positioned between the pair of rotation restricting members. Characteristic ink cartridge L4.

  In the ink cartridge L4, the regulated portion includes a pair of regulated members standing substantially parallel to each other, and the pair of regulated members are positioned between the pair of rotation regulating members. Ink cartridge L5.

  In the ink cartridge L5, the ink supply hole and the joint portion are formed at a position biased to one side from the center portion in the longitudinal direction of the cap, and the rotation restricting portion is biased to the other side in the longitudinal direction. An ink cartridge L6, which is formed at the position where it is formed.

  An ink storage body having an ink storage chamber for storing ink to be supplied to the recording apparatus; and a casing having an ink supply hole for containing the ink storage body and supplying the ink to the recording apparatus. In the ink cartridge that is detachably attached to the apparatus, the ink reservoir includes the ink reservoir, an ink supply section that forms an ink supply path from the ink reservoir to the ink supply hole, and an ink injection unit. An opening and closing valve mechanism for opening and closing the ink supply hole, which has an inlet and an ink injection portion that forms an ink injection path from the ink injection port to the ink storage chamber; A plug member that is press-fitted into the ink injection path and closes the ink injection path, and is press-fitted into the ink injection part and the ink injection path. Ink cartridge M1 member, characterized in that it is concealed from the outside invisible by the housing.

  In the ink cartridge M1, the ink storage body further includes an opening communicating with the ink storage chamber and a film having a liquid blocking property that closes the opening.

  In the ink cartridge M1 or M2, the casing includes a casing main body having an opening communicating with the space for storing the ink reservoir, and a lid for closing the opening, and the ink supply hole is provided in the lid. An ink cartridge M3.

  In the ink cartridge M3, the opening of the housing body is sized to allow the ink reservoir to be inserted therethrough.

  Between the ink reservoir chamber and the open / close valve mechanism in any one of the ink cartridges M1 to M4, the ink prevents backflow of ink from the supply hole to the ink reservoir chamber in the ink supply path. An ink cartridge M5, which is equipped with a backflow prevention mechanism.

  An ink storage body having an ink storage chamber for storing ink to be supplied to the recording apparatus; and a casing having an ink supply hole for containing the ink storage body and supplying the ink to the recording apparatus. A method of manufacturing an ink cartridge that is detachably attached to an apparatus, the ink storage chamber, an ink supply section for forming an ink supply path from the ink storage chamber toward the ink supply hole, and an ink injection port An ink reservoir forming step of forming an ink reservoir having an ink injection path from the ink inlet to the ink reservoir, and an ink supply hole in the ink supply channel. An ink supply path closing step for mounting an open / close valve mechanism for opening and closing and closing an ink supply outlet of the ink supply path; An ink injection process for injecting ink into the ink storage chamber from a mouth; an ink injection path closing process for closing the ink injection path by press-fitting a plug member into the ink injection path; and the ink storage chamber is filled with ink. An ink cartridge manufacturing method M6 comprising: an ink reservoir loading step of loading the ink reservoir into the casing.

  In the ink cartridge manufacturing method M6, the ink reservoir forming step includes the ink reservoir, an opening communicating with the ink reservoir, the ink inlet, and the ink reservoir main body having the ink injector. The ink cartridge according to claim 6, further comprising: a main body forming step for forming the liquid crystal; and an opening closing step for fixing the liquid blocking film to the main body to close the opening. Manufacturing method M7.

  In the ink cartridge manufacturing method M6 or M7, the casing includes a casing main body having an opening that leads to a space that houses the ink reservoir, and a lid that closes the opening, and the ink supply path The ink cartridge manufacturing method M8, wherein the closing step includes a lid body coupling step of coupling the lid body to the ink supply portion after the opening / closing valve mechanism is mounted in the ink supply path.

  In the ink cartridge manufacturing method M8, the ink supply path closing step includes the step of supplying the ink at a position between the ink storage chamber and the opening / closing valve mechanism in the ink supply path before the lid connecting step. A method M9 for manufacturing an ink cartridge, comprising: a backflow prevention mechanism mounting step for mounting a backflow prevention mechanism for preventing backflow of ink from the hole toward the ink storage chamber.

FIG. 2 is a perspective view illustrating an appearance of the ink cartridge according to the first embodiment of the present invention. FIG. 4 is an exploded front view of the ink cartridge, (a) is a front view of the case, (b) is a front view of the frame, and (c) is a front view of the cap. It is a six-sided view of the case, (a) is a diagram showing the front and back of the case, (b) is a diagram showing the left side and the right side of the case, (c) is FIG. 4 is a diagram showing a plan of the case, and FIG. 4D is a diagram showing a bottom surface of the case. It is sectional drawing in IV-IV of FIG.3 (d). It is a six-sided view of the cap, (a) is a diagram showing the front and back of the cap, (b) is a diagram showing the left side and the right side of the cap, (c) is FIG. 4 is a diagram showing a plane of the cap, and FIG. 4D is a diagram showing a bottom surface of the cap. It is the figure which showed the cross section of the cap, (a) is sectional drawing in the VI-VI line of FIG.5 (c), (b) is sectional drawing in the VV line of FIG.5 (c). is there. It is the figure which showed the flame | frame, (a) is the figure which showed the front of the frame, (b) is the figure which showed the back of the frame. It is the figure which showed the frame, (a) is the figure which showed the left side of the frame, (b) is the figure which showed the right side of the frame, (c) shows the plane of the frame (D) is the figure which showed the bottom face of the flame | frame. It is the figure shown by emphasizing the rib of the frame. It is the front view which decomposed | disassembled the flame | frame. It is the front view which disassembled the ink supply valve mechanism. It is the figure which showed the joint member, (a) is the figure which showed the side surface of the joint member, (b) is the figure which showed the plane of the joint member, (c) is the bottom face of a joint member (D) is sectional drawing in the XIId-VIId line | wire of (b). It is the figure which showed the valve member, (a) is the figure which showed the front and back of the valve member, (b) is the figure which showed the left side and right side of the valve member, (c) is the figure which showed the plane of the valve member, (d) is the figure which showed the bottom face of the valve member, (e) is sectional drawing in the XIIIe-XIIIe line | wire of (c). It is the figure which showed the 1st spring member, (a) is the figure which showed the side surface of the 1st spring member, (b) is the figure which showed the plane of the 1st spring member, (c) These are the figures which showed the bottom face of the 1st spring member, (d) is sectional drawing in the XIVd-XIVd line | wire of (b). It is the figure which showed the slider member, (a) is the figure which showed the front and back of the slider member, (b) is the figure which showed the left side and right side of the slider member, (c) is the figure which showed the plane of the slider member, (d) is the figure which showed the bottom face of the slider member, (e) is sectional drawing in the XVe-XVe line | wire of (c). It is the figure which showed the support member, (a) is the figure which showed the side surface of the support member, (b) is the figure which showed the plane of the support member, (c) is the bottom face of a support member (D) is sectional drawing in the XVId-XVId line | wire of (b). It is the figure which showed the check valve, (a) is the figure which showed the side surface of the check valve, (b) is the figure which showed the plane and bottom face of the check valve, (c) It is sectional drawing in the XVIIc-XVIIc line | wire of (b). It is the figure which showed the sheet member, (a) is the figure which showed the side surface of the sheet member, (b) is the figure which showed the plane of the sheet member, (c) is the bottom face of a sheet member (D) is sectional drawing in the XVIIId-XVIIId line | wire of (b). FIG. 3 is a cross-sectional view of the ink cartridge, and is a cross-sectional view taken along line XIX-XIX in FIG. 2. It is a figure for demonstrating the manufacturing process of a flame | frame. It is sectional drawing which expanded and showed the arrow C part of FIG.20 (c). It is a figure for demonstrating the manufacturing method of a flame | frame. It is a figure for demonstrating the manufacturing process of an ink cartridge. It is sectional drawing which expanded and showed the welding part of a case and a cap, (a) has shown the state before welding, (b) has shown the state after welding. It is a figure for demonstrating operation | movement when an ink dispensing stopper is mounted | worn. 4A and 4B are cross-sectional views for explaining a process of mounting the ink cartridge to the ink jet printer, where FIG. 5A shows a state before the ink cartridge is mounted, and FIG. 5B shows a state after the ink cartridge is mounted. It is the figure which showed operation | movement of the valve mechanism. It is a figure for demonstrating operation | movement of a joint member, (a) shows the state before insertion of an ink extraction pipe | tube, and descends, (b) has shown the state by which the ink extraction pipe | tube was inserted. 6 is a graph showing a tactile feeling when an ink cartridge is mounted. 6 is a graph showing a relationship between a frame inclined surface, a remaining ink amount, and a storage volume. It is sectional drawing of the ink cartridge of 2nd Example. It is sectional drawing which showed the cross section of a part of ink supply part of the ink cartridge of 3rd Example, (a) has shown the state before insertion of an ink extraction pipe | tube, (b) has shown the ink extraction pipe | tube. The state after insertion is shown. It is sectional drawing which showed the cross section of a part of ink supply part of the ink cartridge of 4th Example, (a) has shown the state before insertion of an ink extraction pipe | tube, (b) has shown the ink extraction pipe | tube. The state after insertion is shown. It is sectional drawing which showed the cross section of a part of ink supply part of the ink cartridge of 5th Example. It is sectional drawing which showed the cross section of a part of ink supply part of the ink cartridge of 6th Example, (a) has shown the state before insertion of an ink extraction pipe | tube, (b) has shown the ink extraction pipe | tube. The state after insertion is shown. It is sectional drawing which showed the cross section of a part of ink supply part of the ink cartridge of 7th Example, (a) has shown the state before insertion of an ink extraction pipe | tube, (b) is the state of an ink extraction pipe | tube. The state after insertion is shown. It is sectional drawing which showed the cross section of a part of ink supply part of the ink cartridge of 8th Example, (a) has shown the state before insertion of an ink extraction pipe | tube, (b) is the state of an ink extraction pipe | tube. The state after insertion is shown. It is the figure which showed the valve member, (a) is a side view of a valve member, (b) is a top view of a valve member, (c) is a bottom view of a valve member, (d ) Is a sectional view taken along line XXXVIIId-XXXVIIId in FIG. It is sectional drawing which showed the cross section of a part of ink supply part of the ink cartridge of 9th Example, (a) has shown the state before insertion of an ink extraction pipe | tube, (b) has shown the ink extraction pipe | tube. The state after insertion is shown. It is sectional drawing which showed the cross section of a part of ink supply part of the ink cartridge of 10th Example, (a) has shown the state before insertion of an ink extraction pipe | tube, (b) has shown the ink extraction pipe | tube. The state after insertion is shown. It is sectional drawing which showed the cross section of a part of ink supply part of the ink cartridge of 11th Example, (a) has shown the state before insertion of an ink extraction pipe | tube, (b) has shown the ink extraction pipe | tube. The state after insertion is shown. It is sectional drawing which showed the cross section of a part of ink supply part of the ink cartridge of 12th Example, (a) has shown the state before insertion of an ink extraction pipe | tube, (b) has shown the ink extraction pipe | tube. The state after insertion is shown. It is sectional drawing which showed schematically the cross section of the ink cartridge of 13th Example. It is sectional drawing which showed schematically the cross section of the ink cartridge of 14th Example. It is the figure which showed the cross section of the ink cartridge of 15th Example. It is the figure which showed the mounting process to the mounting part of the ink cartridge of 16th Example. It is the figure which showed the outline about the detection method of the ink empty of the ink cartridge of 17th Example. It is the figure which showed the outline about the detection method of the ink empty of the ink cartridge of 18th Example. It is the figure which showed the outline about the detection method of the ink empty of the ink cartridge of 19th Example. It is sectional drawing which expanded and showed the welding part of the case and cap of the ink cartridge of 20th Example. It is the figure which showed the cross section of a part of ink supply part of the ink cartridge of 21st Example. It is the figure which showed the cross section of a part of ink supply of the ink cartridge of 22nd Example. It is a top view of the slider member of a modification, a support member, and a sheet member. It is the figure which showed the cross section of the joint member. It is the figure which showed the cross section of the valve mechanism of a modification.

Explanation of symbols

1-22 Ink cartridge, 100 frame, 110 frame main body, 111 frame projection member, 112 frame collar, 120 ink reservoir, 121 ink dispensing hole, 122 ink supply hole, 123 frame communication hole, 124 frame inclined surface, 125 opening, 130 ink dispensing section, 131 dispensing inner periphery, 140 ink supply section, 141 frame loose insertion member, 142 frame joining member, 150 frame restricting section, 200 case, 210 case opening section, 211 first opening end surface 212, second opening end surface, 220 case ceiling wall, 230 case side wall, 240 case curved portion, 250 case handle, 260 case projection member, 300 cap, 310 cap bottom wall, 320 cap side wall, 330 cap through hole, 340 cap Curved , 350 Cap projection member, 360 Cap joint part, 361 Cap guide groove, 362 Cap joint hole, 370 Cap regulating member, 410, 420, 430, 440 Frame rib member, 450, 460, 470, 480 Frame rib member, 421 441, 451, 461 Rib cylinder, 422, 442, 452, 462 Rib protrusion, 490 Frame rib member, 520 Ink dispensing plug, 530 Valve mechanism, 610 Joint member, 620 Valve member, 630 First spring member, 640 Slider member, 650 Second spring member, 660 Valve seat member, 670 Check valve, 680 Cover member, 710 Joint outer peripheral portion, 720 Joint inner peripheral portion, 721 Bottom surface of joint inner peripheral portion, 722 Opening, 723 Tapered surface, 730Joint contact portion, 731 Upper surface of joint inner peripheral portion, 732 Stepped surface, 733 Inner peripheral surface of joint contact portion, 734 Tip portion of joint contact portion, 740 Joint groove portion, 750 Joint protrusion portion, 751 Joint protrusion portion Inner surface, 760 Ink channel, 761 Taper channel, 762 Protrusion channel, 763 Contact channel, 810 Valve bottom wall, 820 Valve side wall, 830 Valve guide groove, 840 Valve regulating unit, 850 Valve hook Part, 860 ink flow path, 870 valve receiving part, 910 spring bottom part, 911 spring member bottom face, 912 spring member outer peripheral side, 920 spring upper part, 930 spring flexible part, 940 ink flow path, 941 upper flow path, 942 Flexible part flow path, 943 Bottom flow path, 1010 Slider Peripheral wall, 1020 Slider projection, 1021 Slider projection inner wall, 1030 Slider loose insertion member, 1040 Slider seat, 1041 Surface of the slider seat on the valve member side, 1042 Slider outer wall, 1043 Slider seat second Surface abutting against the spring member, 1050 slider through hole, 1060, 1070 inner space, 1110 valve seat bottom, 1120 valve seat middle stage, 1130 valve seat receiving part, 1131 valve seat inclined surface, 1140 first valve seat through hole, 1150 Second valve seat through hole, 1160 Valve seat communication groove, 1210 Check valve flat portion, 1220 Check valve curved portion, 1310 Cover outer peripheral wall, 1320 Cover upper portion, 1330 Cover through hole, 1410 Ink flow path, 1420 Filter, 1430 Film, 1440 internal space, 1450 mating , 1460 Valve mechanism insertion part, 1510 frame manufacturing apparatus, 1520 base part, 1521 base holding part, 1530 vacuum device, 1540 pressing part, 1541 pressing elastic part, 1542 pressing inclined surface, 1543 floating suppression member, 1550 welding apparatus, 1610 Ink dispensing needle, 1710 Inkjet printer, 1720 Ink extraction tube, 1730 Ink extraction groove, 1740 Clamp member, 1750 Clamp engaging part, 1810 Frame, 1820 Ink dispensing part, 1830 Inner part of dispensing, 1840 Ink dispensing plug , 1850 Dispensing stopper groove part, 1910 ink supply part, 1920 valve mechanism, 1930 valve member, 1940 coil spring member, 1950 valve through hole, 1960 valve mechanism insertion part, 2010 ink supply part, 202 0 Valve mechanism, 2040 Coil spring member, 2060 Valve mechanism insertion part, 2110 Ink supply part, 2120 Valve mechanism, 2160 Valve mechanism insertion part, 2170 Filter stopper member, 2180 Stopper through hole, 2220 Valve mechanism, 2240 First spring Member, 2250 second spring member, 2340 spring member, 2350 spring end, 2360 spring flexible part, 2420 valve mechanism, 2430 valve member, 2431 valve bottom part, 2432 valve outer peripheral part, 2433 valve groove part, 2434 valve projection part, 2435 Valve receiving portion, 2436 Valve restraining surface, 2437 Valve receiving surface, 2440 First spring member, 2450 Second spring member, 2470 Joint member, 2471 Joint Peripheral part, 2472 Joint inner peripheral part, 2473 Joint fitting part, 2473 Joint insertion part, 2520 Valve mechanism, 2540 Spring member, 2550 Spring cylindrical part, 2560 Spring end part, 2570 Spring flexible part, 2620 Valve mechanism, 2640 1 Spring member, 2650 2nd spring member, 2720 Valve mechanism, 2740 Spring member, 2750 Spring cylindrical part, 2751 Spring end part, 2752 Spring flexible part, 2753 Spring groove part, 2780 Slider member, 2781 Slider mounting part, 2782 Slider convexity Part, 2820 valve mechanism, 2840 first spring member, 2850 second spring member, 2880 slider member, 2890 slider outer peripheral part, 2891 slider Inter-wall, 2892 Slider through-hole, 2910 Joint member, 2920 Joint outer peripheral part, 2930 Joint inner peripheral part, 2940 Joint abutting part, 2950 Joint groove part, 2960 Ink flow path, 3010 Joint member, 3020 Joint outer peripheral part, 3030 In joint Peripheral portion, 3031 Upper surface of joint inner peripheral portion, 3032 Bottom surface of joint inner peripheral portion, 3033 Opening, 3034 Taper surface, 3035 Inner peripheral surface, 3040 Joint contact portion, 3041 Tip portion of joint contact portion, 3042 Joint contact Part inner peripheral surface, 3050 first joint groove part, 3060 ink flow path, 3061 taper part flow path, 3062 sealing part flow path, 3063 abutting part flow path, 3070 second joint groove part, 3110 valve mechanism, 3120 joy 3130 Joint outer periphery, 3131 Joint inner periphery, 3132 Joint groove, 3133 Ink flow path, 3140 Valve member, 3150 Valve protrusion, 3210 Case, 3220 Case protrusion member, 3310 Case, 3320 Case protrusion member, 3330 Frame 3340 Frame receiving part, 3420 Valve mechanism, 3430 Check valve, 3431 Check valve plate part, 3432 Check valve shaft part, 3423 Check valve ball part, 3450 Cover member, 3451 Cover outer peripheral wall, 3453 Cover upper part, 3453 First cover through hole, 3454 Second cover through hole, 3510 Case, 3520, 3521 Case projection member, 3530 Mounting portion, 3540 Side wall support plate, 3541 Bottom wall receiving plate, 3542 Energizing member, 3543 Clamp member, 35 4 Clamp releasing member, 3545 insertion hole, 3546, 3547 inclined surface, 3550 ink extraction pipe, 3610 frame, 3620, 3621 frame inclined surface, 3622, 3623 frame opening, 3624 frame communication hole, 3630, 3631 film, 3640 blocking plate , 3650 connector, 3660 detection sensor, 3710 frame, 3720, 3721 frame inclined surface, 3730, 3731 film, 3770, 3771 frame opening, 3810 frame, 3820, 3821 frame inclined surface, 3830, 3831 film, 3870, 3871 frame opening Part, 3910 cap projection member, 4010 ink supply part, 4020 ink flow path, 4030 first flow path, 4031 second flow path, 4032 step surface, 404 Filter, 4110 Ink supply section, 4120 Ink flow path, 4121 Ink supply hole, 4140 Filter, 4211 Slider through hole, 4221 First support through hole, 4222 Second support through hole, 4231 Sheet through hole, A Shaft of cap joint B, axis of B valve mechanism, D flexible direction of clamp member, E, G, H, J, K, L, M, N, O, P ink flow path, F, Q operation direction of joint support, I ink, X molten residue, a distance (distance from valve bottom wall to valve hook), b diameter (diameter of joint support before deformation), b1 diameter (diameter of joint support after deformation), c, d Change point of load when ink cartridge is installed, e Range of inclination angle of frame inclined surface, g Pitch length, α Inclination angle (Inclination angle of frame inclined surface)

Claims (3)

In an ink cartridge that has an ink storage chamber for storing ink, and is detachably attached to an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head,
An ink channel chamber that communicates with the ink storage chamber and serves as an ink channel when the ink in the ink storage chamber is supplied to the outside;
An insertion port forming member that is mounted at an ink outlet of the ink flow path chamber and forms an insertion port into which a hollow ink extraction member for extracting the ink protruding from the ink jet recording apparatus is inserted;
An opening and closing valve for opening and closing the insertion port formed by the insertion port forming member;
A biasing member that biases the opening / closing valve toward the insertion port forming member and closes the insertion port;
The insertion port of the insertion port forming member is formed with a tapered portion that is reduced in diameter toward the opening / closing valve side, and is formed to be smaller in diameter than the outer diameter of the ink extraction member while being continuously provided on the smaller diameter side of the tapered portion, When the ink extraction member is inserted, a sealing portion that is in close contact with the periphery of the ink extraction member and seals the periphery of the ink extraction member is connected to the sealing portion and has a larger diameter than the outer diameter of the ink extraction member. Formed with a countersunk portion,
An ink cartridge characterized in that a projecting portion is formed around the countersink portion to close the insertion port in close contact with the opening / closing valve when the ink extraction member is not inserted. In an ink cartridge that has an ink storage chamber for storing ink, and is detachably attached to an ink jet recording apparatus that performs recording by discharging ink stored in the ink storage chamber from a recording head,
An ink channel chamber that communicates with the ink storage chamber and serves as an ink channel when the ink in the ink storage chamber is supplied to the outside;
An insertion port forming member that is mounted at an ink outlet of the ink flow path chamber and forms an insertion port into which a hollow ink extraction member for extracting the ink protruding from the ink jet recording apparatus is inserted;
An opening and closing valve for opening and closing the insertion port formed by the insertion port forming member;
A biasing member that biases the opening / closing valve toward the insertion port forming member and closes the insertion port;
The insertion port of the insertion port forming member is formed with a tapered portion that is reduced in diameter toward the opening / closing valve side, and is formed to be smaller in diameter than the outer diameter of the ink extraction member while being continuously provided on the smaller diameter side of the tapered portion, When the ink extraction member is inserted, the ink extraction member is formed to have a sealing portion that is in close contact with the periphery of the ink extraction member and seals the periphery.
Around the seal portion, there is a protrusion that closes the insertion port when the ink extraction member is not inserted, and closes the insertion port. An ink cartridge, wherein a groove for increasing the flexibility of the portion is recessed. The ink cartridge according to claim 1, wherein the insertion port forming member is made of a combustible elastic material.

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