JP5325277B2 - Liquid filter - Google Patents

Abstract

Provided is a liquid treatment apparatus provided with a cartridge for treating a liquid and a holder for capping the cartridge, wherein the cartridge can be easily removed from the holder and the cartridge is prevented from disconnecting from the holder. A projection (10) projects radially inward from an inner peripheral wall (111w) of an outer cylindrical section (111). A projection (30) is arranged in the circumferential direction of the outer cylindrical section (111) at a position different from the position at which the projection (10) is arranged. A sloping section (81) extends downward, from an upper end (79) to a lower end (78), at a slope along the circumferential direction of an inner cylindrical section (193). A horizontal section (82) extends in the horizontal direction from the lower end (78) of the sloping section (81) along the circumferential direction of the inner cylindrical section (193). A sloping section (84) extends, from an upper end (76) to a lower end (77) along the circumferential direction of the inner cylindrical section (193), at a slope in the circumferential direction of the inner cylindrical section (193).

Description

The present invention relates to a liquid filter having a holder for the cartridge and the lid thereto for filtering liquids.

Regarding a liquid processing device including a cartridge for processing a liquid including filtering the liquid and a holder for covering the cartridge, for example, JP-T-2007-531625 (hereinafter referred to as Patent Document 1) ) And a filter according to Chinese Utility Model Publication No. 2014482290 (hereinafter referred to as Patent Document 2) is known.

  The water filter assembly according to Patent Document 1 includes a cartridge assembly for treating water and a manifold assembly for covering the cartridge assembly.

  A helical tab is formed in the cartridge assembly. In particular, the helical tab is formed outside an edge margin that is part of the top of the cartridge assembly. The spiral tab extends spirally up to a position at the edge margin that is less than half the circumference away from its origin.

  Of the manifold assembly, the cartridge receiver that engages the top of the cartridge assembly is formed with a helical tab. The spiral tab of the manifold assembly is formed inside the edge margin of the cartridge receiver. The spiral tab of the cartridge assembly and the spiral tab of the manifold assembly are helically engaged to connect the manifold assembly and the cartridge assembly to each other.

  The filter according to Patent Literature 2 includes a filter device for treating water and a connection head unit for covering the filter device. As a connection structure between the filter device and the connection head portion, a female screw is formed on the connection head portion, and a male screw is formed on the outer surface of the upper portion of the filter device. The connection head portion and the filter device are connected to each other by blending the female screw of the connection head portion and the male screw of the filter device.

  Further, a connection structure between a container and a cap for covering the container is conventionally known, such as a container with a cap according to Japanese Patent Laid-Open No. 2001-219951 (hereinafter referred to as Patent Document 3). In the container with a cap according to Patent Document 3, the cap is integrally formed by a substantially circular top plate portion, a cylindrical portion extending downward from the periphery of the top plate portion, and four lugs protruding in the inner diameter direction of the cylindrical portion. Has been. On the other hand, four threads corresponding to the lugs of the cap are formed on the outer peripheral surface of the mouth of the container. Each thread extends along the outer peripheral surface of the mouth.

  The sled is constituted by an engaging sled extending horizontally, a stopper, and a guide sled. The stopper extends downward from the left end of the engagement thread. The guide thread extends obliquely upward to the right from the right end of the engagement thread, and then extends to the right above the engagement thread.

  The stopper constitutes a first restricting portion, and the right end portion of the guide thread constitutes a second restricting portion. In the vertical direction of the mouth portion, the distance between the upper edge portion of the first restricting portion and the lower edge portion of the second restricting portion is wider than the width of the lug. On the other hand, in the circumferential direction of the mouth, the distance between the first restricting portion and the second restricting portion is narrower than the length of the lug. With this configuration, when the cap is removed from the container, the lug abuts on the lower edge of the second restricting portion, so that a situation where the cap is removed from the container due to the pressure in the container is prevented.

Special table 2007-531625 gazette China Utility Model Publication No. 2014482290 Specification JP 2001-219951 A

  However, in the water filter assembly according to Patent Document 1, the manifold assembly is fixed to the cartridge assembly by a spiral structure such as a spiral tab of the cartridge assembly and a spiral tab of the manifold assembly. Similarly, in the filter according to Patent Document 2, the connection head portion is fixed to the filter device by a spiral structure such as a female screw of the connection head portion and a male screw of the filter device.

  When the cartridge and the holder are fixed using the spiral structure, the cartridge is detached from the holder by rotating the cartridge along the spiral structure with respect to the holder when the pressure inside the cartridge is applied to the holder. Such a situation may occur.

  On the other hand, the container with a cap according to Patent Document 3 is considered to easily remove the cap from the container even if the cap is configured to prevent the cap from being removed from the container due to pressure in the container. It is not what was done. Similarly, neither the water filter assembly according to Patent Document 1 nor the filter according to Patent Document 2 takes into consideration the ease of removing the cartridge from the holder.

An object of the present invention, a cartridge for filtering liquids, a liquid filter having a holder for the lid to the cartridge can be removed from the holder of the cartridge easily and, It is an object of the present invention to provide a liquid filter in which the cartridge is prevented from being detached from the holder.

Liquid filter according to the present invention, a cartridge for filtering liquids, a liquid filter having a holder. The cartridge has a cylindrical portion that is open at one end and closed at the other end. The holder has a cylindrical portion and is connected to one end of the cartridge.

The holder has a first protrusion, a second protrusion, and a first mark . The first protrusion protrudes radially inward from the inner peripheral wall of the cylindrical portion. The second protrusion is disposed at a position different from the position where the first protrusion is disposed in the circumferential direction of the cylindrical portion, and protrudes inward in the radial direction from the inner peripheral wall. The 1st mark is arrange | positioned in the position which opposes the 1st projection part of the inner peripheral wall of a cylindrical part in the outer peripheral wall of a cylindrical part. The first mark is for indicating the starting position of rotation of the cartridge relative to the holder. The cartridge has two convex portions protruding outward in the radial direction from the outer peripheral wall of one end portion. The cartridge has a second mark. The second mark is disposed in the gap between the two convex portions in the circumferential direction of the cartridge. The second mark is for indicating the starting position of rotation of the cartridge relative to the holder. The width of the first protrusion along the circumferential direction of the tubular portion and the width of the second protrusion along the circumferential direction of the tubular portion are each an arc whose central angle is 45 degrees. Or less. Furthermore, the interval along the circumferential direction of the cylindrical portion between the first protrusion and the second protrusion adjacent to each other in the cylindrical portion is larger than the length of the arc whose central angle is 45 degrees.

The convex portion has a first slope portion, a horizontal surface portion, and a second slope portion. The first inclined surface portion protrudes from the outer peripheral wall and extends from one end portion to the other end portion along the first direction in the circumferential direction of the cylindrical portion from the first position to the second position of the outer peripheral wall. It extends diagonally. The horizontal surface portion protrudes from the outer peripheral wall and extends in the horizontal direction along the first direction in the circumferential direction of the cylindrical portion from the second position to the third position of the outer peripheral wall. The second slope portion protrudes from the outer peripheral wall and extends from one end portion to the other end portion along the first circumferential direction of the tube portion from the fourth position to the fifth position of the outer peripheral wall. It extends diagonally.

According to the present invention, when the cartridge is attached to the holder in the liquid filter , the first protrusion is the other end of the first inclined surface from the one end to the other end. It moves smoothly along the side surface in the first circumferential direction. Moreover, the 1st projection part is further moved in the circumferential direction along the other end part side surface of the horizontal surface part from the other end part side end of the 1st slope part of a convex part, The horizontal surface part of a convex part It is arrange | positioned at the other end part side surface. Thereby, the one end part of a cartridge is connected with the cylindrical part of a holder. In this way, the cartridge and the holder are fixed to each other.

In the liquid filter according to the present invention, in a state where the cartridge and the holder are fixed, the first protrusion is in contact with the horizontal surface portion of the convex portion. Therefore, unlike the connection by the spiral structure, the pressure inside the cartridge is not converted into a force for rotating the cartridge with respect to the holder. That is, according to the present invention, the cartridge is prevented from being detached from the holder.

In addition, when the cartridge is removed from the holder in the liquid filter according to the present invention, the first protrusion moves in the opposite direction of the first circumferential direction along the side surface of the other end of the horizontal surface. On the other hand, in this case, the second projecting portion is inclined from the other end portion toward the one end portion along the opposite direction of the first direction in the circumferential direction of the cylindrical portion, and the one end side surface of the second slope portion. Slide smoothly. Thereby, a cartridge can be easily removed from a holder.

In this case, the second protrusion moves from the vicinity of the fifth position of the outer peripheral wall of the cylindrical portion to the fourth position. That is, the second protrusion moves from a position different from the position where the first inclined surface portion is arranged in the circumferential direction of the cylinder portion to a position different from the position where the horizontal surface portion is arranged in the circumferential direction of the cylinder portion. To do. Since it is comprised in this way, when the 1st projection part is contacting the horizontal surface part in the liquid filter which concerns on this invention, a 2nd projection part does not contact a 2nd slope part. Therefore, the pressure inside the cartridge is not converted into a force for rotating the holder with respect to the cartridge. That is, according to the present invention, the cartridge is prevented from being detached from the holder.

In the liquid filter according to the present invention, a part of the end surface of the first protrusion that faces the first inclined surface of the convex portion when the holder covers the cartridge is formed on the first inclined surface. It is preferable that a curved surface portion that curves so as to protrude toward the surface is formed.

According to this configuration, the curved surface portion of the first protrusion is curved so as to protrude toward the first slope portion. Therefore, when the cartridge is attached to the holder in the liquid filter , the first protrusion can smoothly slide on the first inclined surface portion via the curved surface portion. That is, when the cartridge is attached to the holder in the liquid filter , the first protrusion is more smoothly formed on the first inclined surface portion from the one end side to the other end side of the cartridge. Along the circumferential direction of the one end. Thus, according to this configuration, the cartridge can be easily attached to the holder.

In the liquid filter according to the present invention, a part of the end surface of the first projecting portion facing the first inclined surface portion of the convex portion when the holder covers the cartridge is arranged in the longitudinal direction of the cylindrical portion. It is preferable that an inclined surface portion that is inclined with respect to the circumferential direction and extends in a direction substantially parallel to the direction in which the first inclined surface portion extends is formed.

According to this configuration, the inclined surface portion of the first protrusion extends in a direction substantially parallel to the direction in which the first inclined surface portion extends. Therefore, when the cartridge is attached to the holder in the liquid filter , the first protrusion can smoothly slide on the first inclined surface portion via the inclined surface portion. That is, when the cartridge is attached to the holder in the liquid filter , the first protrusion is more smoothly formed on the first inclined surface portion from the one end side to the other end side of the cartridge. Along the circumferential direction of the one end. Thus, according to this configuration, the cartridge can be easily attached to the holder.

In the liquid filter according to the present invention, a part of the end surface of the second projecting portion facing the second inclined surface portion of the convex portion when the cartridge is removed from the holder faces the second inclined surface portion. It is preferable that a curved surface portion that is curved so as to protrude is formed.

According to this configuration, the curved surface portion of the second protrusion is curved so as to protrude toward the second slope portion. Therefore, when the cartridge is removed from the holder in the liquid filter , the second protrusion can smoothly slide on the second inclined surface portion via the curved surface portion. That is, when the cartridge is removed from the holder in the liquid filter , the second protrusion is more smoothly formed on the second inclined surface portion from the other end of the cartridge toward the one end. Along the circumferential direction of the one end. Thus, according to this configuration, the cartridge can be easily detached from the holder.

In the liquid filter according to the present invention, a part of the end surface of the second protrusion portion that faces the second inclined surface portion of the convex portion when the cartridge is removed from the holder has a longitudinal direction of the cylindrical portion and It is preferable that an inclined surface portion that is inclined with respect to the circumferential direction and extends in a direction substantially parallel to the direction in which the second inclined surface portion extends is formed.

According to this configuration, the inclined surface portion of the second protrusion extends in a direction substantially parallel to the direction in which the second inclined surface portion extends. Therefore, when the cartridge is removed from the holder in the liquid filter , the second protrusion can smoothly slide on the second inclined surface portion via the inclined surface portion. That is, when the cartridge is removed from the holder in the liquid filter , the second protrusion is more smoothly formed on the second inclined surface portion from the other end of the cartridge toward the one end. Along the circumferential direction of the one end. Thus, according to this configuration, the cartridge can be easily detached from the holder.

In the liquid filter according to the present invention, the first protrusion is formed with a horizontal surface portion extending in a direction substantially parallel to the direction in which the horizontal surface portion of the convex portion extends when the holder covers the cartridge. It is preferable.

According to this configuration, when the holder covers the cartridge, the one side surface of the horizontal surface portion of the first protrusion moves along the other side surface of the horizontal surface portion of the convex portion. The protrusion can move in the circumferential direction more smoothly with respect to the cartridge. Further, according to this configuration, when the cartridge is connected to the holder in the liquid filter , the horizontal surface portion of the first protrusion is in contact with the horizontal surface portion of the convex portion. Thereby, it can restrict | limit more reliably that the pressure inside a cartridge acts as a force with which a cartridge is removed with respect to a holder.

In the liquid filter according to the present invention, it is preferable that the holder has two sets of first protrusions and second protrusions. It is preferable that the first protrusions and the second protrusions are alternately arranged in the circumferential direction of the cylindrical part. It is preferable that the cylindrical part of the holder has a cylindrical shape.

According to this configuration, since the two first protrusions are in contact with the horizontal surface portions of the plurality of convex portions, the cartridge can be fixed to the holder in a stable state. That is, according to this configuration, the position of the cartridge is stabilized with respect to the holder. In addition, the first protrusion can be moved more smoothly with respect to the first inclined surface than in the case where there is one first protrusion. Compared with the case where there is one second protrusion, the second protrusion can be moved more smoothly with respect to the second inclined surface.

According to this configuration, when the user of the liquid filter starts to attach the cartridge to the holder, the case where the first protrusion or the second protrusion comes into contact with the one end of the convex portion, There are 4 patterns. Two of the four patterns are examples in which the first protrusion contacts the one end of the convex portion, and the remaining two patterns have the second protrusion in contact with the one end of the convex portion. This is an example. However, according to this configuration, the user of the liquid filter contacts the first protrusion or the second protrusion with one end of the convex portion without confirming the insertion position of the cartridge with respect to the holder. Even in such a case, the position where the cartridge is rotated about 45 degrees in either of the circumferential directions from the position can be determined as the rotation start position. The user can easily attach the cartridge to the holder by starting to rotate the cartridge from this rotation start position. Therefore, according to this structure, the freedom degree of the insertion position of the one end part of the cartridge with respect to the cylindrical part of a holder can be increased.

In the liquid filter according to the present invention, preferably, a seal member is attached to one end side of the outer peripheral wall of the one end part of the cartridge from the convex part. It is preferable that the holder has the other cylindrical part arrange | positioned at the one end part side rather than the cylindrical part. Preferably, a dimension a between the one end side end of the first slope part and the one end side end of the horizontal plane part, and a dimension b between the one end side end and the other end side end of the sealing member. And the dimension c between the other end portion side end of the seal member and the one end portion end of the first slope portion, the other end portion end of the inner peripheral wall of the other cylindrical portion, and the first protrusion portion The relationship of a + c ≧ d, a ≧ b, and c ≦ d is established with the dimension d between the one end side.

According to this configuration, since the sealing performance between the holder and the cartridge can be ensured, it is possible to prevent liquid from leaking between the holder and the cartridge. On the other hand, when the user of the liquid filter attaches the cartridge to the holder, a frictional force is generated between the other tubular portion and the seal member when the seal member is attached to the other tubular portion of the holder. Due to resistance. However, according to this configuration, when resistance is generated between the holder and the seal member, the circumference of the one end portion is formed along the lower side surface of the first slope portion from the one end portion side to the other end portion side of the cartridge. The first protrusion can be moved in the direction. Thus, when resistance arises between a holder and a sealing member, the user can move the 1st projection part using the 1st slope part. Therefore, the user does not need to put an extremely large force in order to exert a force that can overcome the resistance. That is, the user can attach the cartridge to the holder without applying much force.

In the liquid filter according to the present invention, it is preferable that one end of the cartridge is provided with another seal member on one end of the seal member. Moreover, it is preferable that the dimension between the one end part side end of the other sealing member and the other end part side end is the same as the dimension between the one end part side end and the other end part side end of the seal member.

According to this configuration, the liquid can be further prevented from leaking between the holder and the cartridge by the seal member and the other seal member. Further, according to this configuration, when resistance is generated between the holder and the seal member and between the holder and the other seal member, the first end from the one end portion side to the other end portion side of the cartridge is generated. The first protrusion can be moved in the circumferential direction of the one end along the slope. Therefore, the user of the liquid filter can attach the cartridge to the holder without applying much force.

As described above, according to the present invention, a cartridge for filtering liquids, a liquid filter having a holder for the lid to the cartridge can be removed from the holder of the cartridge easily In addition, it is possible to provide a liquid filter in which the cartridge is prevented from being detached from the holder.

It is a perspective view showing the whole liquid filter concerning the present invention. It is a front view showing the whole liquid filter concerning the present invention. It is a top view which shows the whole liquid filter which concerns on this invention. It is sectional drawing of the IV-IV line of FIG. It is sectional drawing of the VV line of FIG. It is a top view which shows the whole cartridge of the liquid filter which concerns on this invention. It is a perspective view which shows the convex-shaped part of a cartridge. It is a bottom view which shows the whole holder of the liquid filter which concerns on this invention. (A) is a perspective view which shows the 1st projection part and the 2nd projection part of the cylindrical part of a holder, (B) is sectional drawing of the BB line of (A). It is a figure which shows the one end part of a cartridge, and the cylindrical part of a holder, Comprising: It is a figure which shows the state before the 1st projection part of a cylindrical part slides a 1st slope part. It is a figure which shows the one end part of a cartridge, and the cylindrical part of a holder, Comprising: It is a figure which shows the state which the one end side end of the 1st projection part of a cylindrical part contacts a 1st slope part. It is a figure which shows the one end part of a cartridge, and the cylindrical part of a holder, Comprising: It is a figure which shows the state which the 1st projection part of a cylindrical part moves a horizontal surface part from the other end side end of a 1st slope part. . It is a figure which shows the one end part of a cartridge, and the cylindrical part of a holder, Comprising: The figure which shows the state with which the cartridge was attached with respect to the holder by the 1st projection part of a cylindrical part fitting to a horizontal surface part. is there. It is a figure which shows the one end part of a cartridge, and the cylindrical part of a holder, Comprising: It is a figure which shows the state before the 2nd projection part of a cylindrical part slides a 2nd slope part. It is a figure which shows the one end part of a cartridge, and the cylindrical part of a holder, Comprising: It is a figure which shows the state which the 2nd projection part of a cylindrical part slides on a 2nd slope part. It is a figure which shows the one end part of a cartridge, and the cylindrical part of a holder, Comprising: The state from which the cartridge was removed with respect to the holder by the 2nd projection part of a cylindrical part sliding on a 2nd slope part is shown. FIG. It is a figure which shows roughly the modification of the 1st projection part formed in the holder of the liquid filter which concerns on this invention. It is a figure which shows roughly the modification of the 2nd projection part formed in the holder of the liquid filter which concerns on this invention. It is a figure which shows roughly the modification of the 1st projection part and the 2nd projection part which were formed in the holder of the liquid filter which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 shows a filter assembly 100 for a water purifier as an example of a liquid filter for filtering a liquid as a liquid treatment . The filter assembly 100 includes a cartridge 190 for filtering water as a liquid, and a holder 110 connected to one end of the cartridge 190. In the following, the one end portion of the cartridge 190 refers to the upper end portion of the cartridge 190 on the assumption that the holder 110 is attached to the cartridge 190 as shown in FIG. On the other hand, the other end of the cartridge 190 refers to the lower end of the cartridge 190. Therefore, in the filter assembly 100, the one end side refers to the upper side, and the other end side refers to the lower side.

  The direction of the filter assembly 100 such as up, down, left, and right changes depending on the posture in which the filter assembly 100 is arranged in a water purifier (not shown). Similarly, depending on the posture in which the filter assembly 100 is disposed in the water purifier, the one end and the other end of the cartridge 190 are, for example, the left end and the right end, or the lower end and the upper end, respectively. Moreover, according to the attitude | position in which the filter assembly 100 is arrange | positioned in a water purifier, the one end and other end of the holder 110 are respectively a left end and a right end, or a lower end and an upper end, respectively.

  As shown in FIG. 2, the holder 110 has an outer cylinder part 111 as an example of a cylindrical part, and an inner cylinder part 112 disposed above the outer cylinder part 111. The inner cylinder part 112 is an example of another cylindrical part. The outer cylinder part 111 is disposed at the lower part of the holder 110. As shown in FIGS. 2 and 3, the outer cylinder portion 111 and the inner cylinder portion 112 have a cylindrical shape. The center of the outer cylinder portion 111 and the center of the inner cylinder portion 112 coincide with each other and are the center C1 (see FIG. 8). A tubular member 120 is disposed on the holder 110. The tubular member 120 has an inflow portion 121 and an outflow portion 122.

  As shown in FIGS. 4, 5, and 8, the inner cylinder portion 193 is configured so that the position of the lower end of the inner peripheral wall 112 w substantially coincides with the position of the ceiling surface 111 c of the outer cylinder portion 111. It is connected to the. On the other hand, as shown in FIGS. 4 and 5, the cartridge 190 has a storage portion 191 that stores the filter medium 180 and an upper end portion. The upper end portion as one end portion of the cartridge 190 has an outer cylinder portion 192, an inner cylinder portion 193, a fitting portion 194, and a fitting portion 195. The accommodating portion 191 is configured to include the lower end portion of the cartridge 190.

  The accommodating part 191 has a cylindrical shape. The bottom of the accommodating part 191 is closed. An accommodation space 182 for the filter medium 180 is formed inside the accommodation portion 191. When the filter assembly 100 filters water as a liquid, the accommodation space 182 is filled with water. The filter medium 180 is disposed with a predetermined interval between the filter medium 180 and the inner peripheral surface 181 of the housing portion 191. The filter medium 180 is formed by, for example, a hollow fiber filter. The filter medium 180 is detachably attached to the upper end portion of the cartridge 190.

  In the cartridge 190, the accommodating portion 191, the outer cylinder portion 192, the inner cylinder portion 193, the fitting portion 194, and the fitting portion 195 constitute a cylinder portion. Further, in the cartridge 190, the outer cylinder part 192, the inner cylinder part 193, the fitting part 194, and the fitting part 195 are integral with each other. Outflow port 192b that allows water to flow out from the inside of cartridge 190 is formed at the upper end of fitting portion 195 among integral outer cylinder portion 192, inner cylinder portion 193, fitting portion 194, and fitting portion 195. Has been. As described above, the cartridge 190 has a cylindrical portion whose upper end is open and whose lower end is closed.

  The fitting part 195, the fitting part 194, the inner cylinder part 193, and the outer cylinder part 192 each have a cylindrical shape centered on the center C2 (see FIG. 6). An O-ring 63 and an O-ring 64 as examples of other seal members are attached to the outer peripheral wall of the fitting portion 195. The O-ring 63 and the O-ring 64 are the same. A cylindrical sheath portion 123 covers the upper portion of the fitting portion 195 to which the O-ring 63 and the O-ring 64 are attached and the outside of the outer peripheral wall, thereby sealing between the sheath portion 123 and the fitting portion 195. Is done. The sheath portion 123 extends downward from the tubular member 120 (that is, the upper portion of the holder 110).

  As shown in FIG. 5 and FIG. 6, the fitting portion 194 is a portion extending in a flange shape from the fitting portion 195 outward in the radial direction of a circle centered on the center C <b> 2. As shown in FIG. 6, a plurality of openings 192 a are formed on the upper surface 196 of the fitting portion 194. The water flowing through the inflow portion 121 of the tubular member 120 flows into the cartridge 190 by passing through the opening 192a. The inner cylinder portion 193 is a portion extending in a flange shape from the fitting portion 194 outward in the radial direction of the circle centered on the center C2. An O-ring 61 and an O-ring 62 as an example of a seal member are attached to the outer peripheral wall of the fitting portion 194 (see FIG. 5). The O-ring 61 and the O-ring 62 are the same. The O-rings 61, 62, 63, 64 are formed of an elastic member such as rubber.

  The inner cylinder portion 193 is a portion extending in a flange shape from the fitting portion 194 outward in the radial direction of the circle centered on the center C2. The outer cylinder portion 192 is a portion extending in a flange shape from the inner cylinder portion 193 outward in the radial direction of a circle centered on the center C2. The outer cylinder part 192 and the accommodating part 191 are detachably fixed to each other. The center C1 of the holder 110 and the center C2 of the cartridge 190 coincide with each other when the cartridge 190 is fitted into the holder 110.

  Here, the flow of water flowing into the cartridge 190 and the flow of water flowing out of the cartridge 190 will be described with reference to FIGS.

  Water to be purified, such as tap water or well water, flows into the inflow section 121 through the inflow port 121a. The water flowing through the inflow portion 121 flows into the holder 110 by passing through the communication port 121b. The communication port 121 b allows the inside of the inflow portion 121 to communicate with the inside of the inner cylinder portion 112 of the holder 110. The water that has flowed into the inner cylindrical portion 112 flows to the accommodation space 182 by passing through the opening 192 a of the cartridge 190.

  The water filtered by the filter medium 180 in the storage space 182 flows out of the cartridge 190 from the upper side of the filter medium 180. At this time, the filtered water flows to the outflow portion 122 through the outlet 192b. The inside of the outflow portion 122 and the inside of the holder 110 are communicated with each other through a communication port 124. The water that has passed through the outflow port 192 b further flows out into the outflow portion 122 by passing through the communication port 124. The filtered water flowing through the outflow portion 122 flows out of the filter assembly 100 through the outflow port 122b.

  The filter assembly 100 includes an O-ring 61 and an O-ring 62 that seal between the inner peripheral wall 112w (see FIG. 8) of the inner cylinder portion 112 of the holder 110 and the fitting portion 194 of the cartridge 190. O-ring 61 and O-ring 62 prevent water flowing into filter assembly 100 from leaking between holder 110 and cartridge 190. The filter assembly 100 includes an O-ring 63 and an O-ring 64 that seal between the sheath 123 of the holder 110 and the fitting portion 195 of the cartridge 190. The O-ring 63 and the O-ring 64 prevent water flowing out from the cartridge 190 to the holder 110 and water flowing from the holder 110 into the cartridge 190 from being mixed.

  The fitting part 194 to which the O-rings 61 and 62 are attached and the fitting part 195 to which the O-rings 63 and 64 are attached are integral. Since the O-rings 61 and 62 and the O-rings 63 and 64 are attached to the cartridge 190 in which the fitting portion 194 and the fitting portion 195 are integrated, the above-described two places of water leakage can be more effectively performed. Can be prevented.

  The cartridge 190 has a convex portion 80. As shown in FIGS. 6 and 7, the convex portion 80 is formed on the outer peripheral wall of the inner cylindrical portion 193 so as to protrude outward in the radial direction from the outer peripheral wall of the inner cylindrical portion 193. As shown in FIG. 7, the convex portion 80 includes an attachment-side slope portion 81 as an example of a first slope portion, a horizontal surface portion 82, and a removal slope portion 84 as an example of a second slope portion. And have. In the convex portion 80, the slope portion 81, the horizontal plane portion 82, and the slope portion 84 are integral. Further, the slope portion 81 and the horizontal surface portion 82 are continuous at the convex portion 80. As will be described later, the slope portion 81 functions when the cartridge 190 is attached to the holder 110, and thus is an attachment slope portion (see FIG. 10). On the other hand, since the slope portion 84 functions when the cartridge 190 is removed from the holder 110, the slope portion 84 is a removal slope portion (see FIG. 14).

  The slope portion 81 projects from the outer peripheral wall of the inner cylinder portion 193 and extends obliquely from above to below along the first circumferential direction of the inner cylinder portion 193. An upper end 79 of the slope portion 81 is disposed below the lower end of the fitting portion 194. The lower end 78 of the slope portion 81 is disposed above the upper surface 197 of the outer cylinder portion 192. A lower end 78 of the slope portion 81 coincides with an upper end 78 of the horizontal plane portion 82. The slope portion 81 extends from the upper end 79 to the lower end 78 on the outer peripheral wall of the inner cylinder portion 193. The position of the upper end 79 of the slope portion 81 is an example of a first position, and the position of the lower end 78 is an example of a second position.

  The horizontal surface portion 82 protrudes from the outer peripheral wall of the inner cylinder portion 193 and extends in the horizontal direction along the first circumferential direction of the inner cylinder portion 193 from the lower end 78 to the terminal end 75 of the inclined surface portion 81. . The terminal end 75 as an example of the third position is disposed behind the stopper surface 83 described later in the first direction. In addition, the 1st direction of the circumferential direction of the inner cylinder part 193 means the direction which goes to the left from the right of FIG.

  The slope portion 84 protrudes from the outer peripheral wall of the inner cylinder portion 193 and extends obliquely from above to below along the first circumferential direction of the inner cylinder portion 193. The slope portion 84 extends from the upper end 76 to the lower end 77 on the outer peripheral wall of the inner cylinder portion 193. The position of the upper end 76 of the slope portion 84 is an example of a fourth position, and the position of the lower end 77 is an example of a fifth position. The upper end 76 as the fourth position is disposed above the terminal end 75 as the third position. Further, the upper end 76 is disposed in front of the end 75 in the circumferential direction of the inner cylinder portion 193 as shown in FIG. However, the position of the upper end 76 and the position of the terminal end 75 along the circumferential direction of the inner cylinder portion 193 may substantially coincide with each other. As described above, the slope portion 84 is obliquely inclined from above to below along the circumferential direction of the inner cylinder portion 193 from a position different from the position where the horizontal plane portion 82 is disposed in the circumferential direction of the inner cylinder portion 193. Furthermore, it extends to a position different from the position where the slope portion 81 is arranged in the first circumferential direction of the inner cylinder portion 193. Further, the slope portion 84 is disposed below the position where the slope portion 81 is disposed. The slope portion 84 is located at a position different from the position where the horizontal plane portion 82 is arranged in the circumferential direction of the inner cylinder portion 193 and from below the position where the slope portion 81 is arranged. It extends diagonally from the top to the bottom along the first direction.

  In the convex portion 80, a stopper surface 83 is formed in front of the horizontal surface portion 82 in the first direction in the circumferential direction of the inner cylinder portion 193. The position of the upper end of the stopper surface 83 along the vertical direction may coincide with the position of the horizontal plane portion 82. That is, the position of the upper end of the stopper surface 83 may coincide with the position of the terminal end 75. Alternatively, the position of the upper end of the stopper surface 83 along the vertical direction may be lower than the position of the horizontal surface portion 82 as shown in FIG. The shape of the stopper surface 83 including the position of the upper end of the stopper surface 83 along the vertical direction is the shape of the end surface of the protruding portion 10 (see FIG. 9) that faces the inclined surface portion 81 when the holder 110 covers the cartridge 190. (See FIG. 13).

  On the other hand, as shown in FIGS. 8 and 9, the holder 110 includes a protrusion 10 as an example of a first protrusion and a protrusion 30 as a second protrusion. The protruding portion 10 protrudes inward in the radial direction from the inner peripheral wall 111 w of the outer cylinder portion 111. As shown in FIG. 8, the protrusion 30 is arranged at a position different from the position where the protrusion 10 is arranged in the circumferential direction of the outer cylinder portion 111. The protrusion 30 protrudes inward in the radial direction from the inner peripheral wall 111w. As shown in FIG. 9, the position of the lower end surface of the protruding portion 10 along the vertical direction and the position of the lower end surface of the protruding portion 30 coincide with the position of the bottom surface 111 d of the outer cylinder portion 111. Further, the position of the upper end 11p of the protrusion 10 along the vertical direction coincides with the position of the upper end of the curved surface part 11 and the position of the horizontal surface part 12.

  As will be described later, the protrusion 10 functions when the cartridge 190 is attached to the holder 110, and thus is an attachment protrusion. On the other hand, since the protrusion 30 functions when the cartridge 190 is removed from the holder 110, the protrusion 30 is a removal protrusion.

  An alignment mark 91 is disposed on the outer peripheral surface of the outer cylinder portion 111 (see FIG. 9A). The mark 91 has, for example, an inverted triangular shape. On the other hand, an alignment mark 92 is disposed on the outer peripheral wall of the inner cylindrical portion 193 of the cartridge 190 (see FIG. 7). The mark 92 has, for example, a triangular shape. The user can easily perform predetermined alignment when starting to attach the cartridge 190 to the holder 110 by matching the position of the apex of the mark 91 facing downward with the position of the apex of the mark 92 facing upward. it can.

  As illustrated in FIG. 9B, the surface 91 s of the mark 91 forms the same surface as the surface 111 s of the outer peripheral wall of the outer cylinder portion 111. Of the mark 91, a groove 91d is formed in a portion between the surface 91s and the surface 111s. On the other hand, the mark 92 of the cartridge 190 is similarly formed on the outer peripheral wall surface of the inner cylinder portion 193. With such a configuration, the visibility of the marks 91 and 92 can be improved.

As shown in FIG. 8, the holder 110 has two sets of protrusions 10 and protrusions 30. The protrusions 10 and the protrusions 30 are alternately arranged in the circumferential direction of the inner peripheral wall 111 w of the outer cylinder part 111. The outer cylinder part 111 of the holder 110 has a cylindrical shape (see FIGS. 1 and 2). The width W ₁₀ of the protrusion 10 along the circumferential direction of the outer tubular portion 111, the width W ₃₀ of the protrusion 30 along the circumferential direction of the outer tubular portion 111, each central angle of the outer tubular portion 111 It is less than the length of the arc which is 45 degrees. As shown in FIG. 8, the central angle θ ₁ and the central angle θ ₃ are 45 degrees or less. In addition, the distance between the protrusion 10 and the protrusion 30 adjacent to each other in the outer cylinder 111 along the circumferential direction of the outer cylinder 111 is larger than the length of the arc whose central angle is 45 degrees. As shown in FIG. 8, the central angle θ ₂ is larger than 45 degrees. On the other hand, the cartridge 190 has two convex portions 80 (see FIG. 6). The two convex portions 80 are arranged at equal intervals in the inner cylinder portion 193.

  Next, the rotation of the cartridge 190 relative to the holder 110, that is, the movement of the protrusion 10 relative to the convex portion 80 when the cartridge 190 is attached to the holder 110 will be described with reference to FIGS.

  As shown in FIG. 10, when the user attaches the cartridge 190 to the holder 110, the position of the apex below the mark 91 and the position of the apex above the mark 92 in the circumferential direction of the outer cylinder portion 111. And approximately match. A position where the position of the apex below the mark 91 and the position of the apex above the mark 92 substantially coincide with each other in the circumferential direction of the outer cylinder portion 111 is optimal as a rotation start position for attaching the cartridge 190 to the holder 110. It is the position. The state of the holder 110 and the cartridge 190 shown in FIG. 10 is that the position of the horizontal surface portion 12 along the vertical direction (that is, the position of the upper end 11p of the protrusion 10) and the position of the upper end 79 of the inclined surface portion 81 along the vertical direction. Are substantially the same.

  A curved surface portion 11 that is curved so as to protrude toward the inclined surface portion 81 is formed on a part of the end surface of the protruding portion 10. The end surface on which the curved surface portion 11 is formed faces the inclined surface portion 81 when the holder 110 covers the cartridge 190. Further, a horizontal surface portion 12 is formed on the protruding portion 10. The direction in which the horizontal surface portion 12 extends is a direction substantially parallel to the direction in which the horizontal surface portion 82 of the convex portion 80 extends when the holder 110 covers the cartridge 190.

The O ring 61 and the O ring 62 are disposed above the convex portion 80. Dimension a between the upper end 79 of the slope portion 81 and the upper end 78 of the horizontal plane portion 82, dimension b between the upper end of the O ring 62 and the lower end of the O ring 61, the lower end of the O ring 61, and the slope portion 81. Between the dimension c between the upper end 79 and the dimension d between the lower end of the inner peripheral wall 112w of the inner cylinder part 112 and the upper end 11p of the protrusion 10 , a + c ≧ d, a ≧ b, and c ≦ d The relationship holds. As described above, the position of the lower end of the inner peripheral wall 112w substantially coincides with the position of the ceiling surface 111c of the outer cylinder portion 111.

The O ring 63 and the O ring 64 are disposed above the O ring 62. The dimension b between the upper end of the O ring 64 and the lower end of the O ring 63 is the same as the dimension b between the upper end of the O ring 62 and the lower end of the O ring 61. That is, the dimension a between the upper end 79 of the slope part 81 and the upper end 78 of the horizontal part 82, the dimension b between the upper end of the O-ring 64 and the lower end of the O-ring 63, the lower end of the O-ring 61 and the slope part. 81 and the dimension d between the lower end of the inner peripheral wall 112 w and the upper end 11 p of the protrusion 10, there are relationships of a + c ≧ d, a ≧ b, and c ≦ d. It holds.

  By rotating the cartridge 190 from the rotation start position, the fitting of the cartridge 190 to the holder 110 proceeds. When the cartridge 190 is rotated in the R1 direction shown in FIG. 11 from the state of the holder 110 and the cartridge 190 shown in FIG. 10, the curved surface portion 11 comes into contact with a portion below the upper end 79 of the slope portion 81. By continuing the rotation in the R1 direction, the curved surface portion 11 moves obliquely from above to below along the circumferential direction of the outer tube portion 192. At this time, since the curved surface portion 11 slides along the lower side surface of the slope portion 81, the curved surface portion 11 can smoothly move obliquely from above to below.

  The position of the bottom surface 111d (see FIG. 9A) of the outer cylinder part 111 with respect to the outer cylinder part 192 along the vertical direction shown in FIG. 10 and the outer side with respect to the outer cylinder part 192 along the vertical direction shown in FIG. The position of the bottom surface 111d of the cylindrical portion 111 is substantially the same.

  As the rotation in the R1 direction further proceeds, the curved surface portion 11 moves to a position below the lower end 78 of the slope portion 81 (that is, the upper end 78 of the horizontal surface portion 82) (see FIG. 12). When the rotation in the R1 direction further proceeds from this position, the protruding portion 10 moves with respect to the protruding portion 80 while the curved surface portion 11 is in contact with the lower end of the inclined surface portion 81, so that the curved surface portion 11 becomes the horizontal plane portion 82. Easily moves down.

  After the curved surface portion 11 moves to the lower side of the horizontal surface portion 82 with respect to the convex portion 80, the rotation in the R1 direction further proceeds, so that the horizontal surface portion 12 of the outer cylinder portion 192 extends along the lower side surface of the horizontal surface portion 82. Move in the circumferential direction. The holder 110 and the cartridge 190 are fitted together at a position where the entire horizontal surface portion 12 is disposed below the horizontal surface portion 82 (see FIG. 13). The movement of the protrusion 10 with respect to the convex portion 80 is limited, for example, at a position where the tip of the curved surface portion 11 contacts the stopper surface 83.

  As shown in FIG. 13, the width of the outer peripheral surface of the horizontal surface portion 12 along the circumferential direction of the outer cylinder portion 111 is substantially the same as the width of the lower side surface of the horizontal surface portion 82 along the circumferential direction of the inner cylinder portion 193. It is. The width of the outer peripheral surface of the horizontal plane portion 12 along the circumferential direction of the outer cylinder portion 111 is preferably equal to or greater than the width of the lower side surface of the horizontal plane portion 82 along the circumferential direction of the inner cylinder portion 193. Due to such a magnitude relationship, the cartridge 190 can be fixed to the holder 110 in a more stable state.

  Next, in the following, the movement of the protrusion 30 with respect to the convex portion 80 when the cartridge 190 is removed from the holder 110, that is, the rotation of the cartridge 190 relative to the holder 110 when the cartridge 190 is removed from the holder 110 will be described with reference to FIG. -16 will be used for explanation.

  The state of the holder 110 and the cartridge 190 shown in FIG. 14 is a state in which the horizontal surface portion 12 of the protrusion 10 is disposed below the horizontal surface portion 82, similarly to the state of the holder 110 and cartridge 190 shown in FIG. .

  In the state where the cartridge 190 is connected to the holder 110, the distance between the upper side surface of the slope portion 84 along the circumferential direction of the inner cylinder portion 193 and the lower end of the projection portion 30 is along the circumferential direction of the outer cylinder portion 111. The width of the outer peripheral surface of the horizontal surface portion 12 is larger. Alternatively, in a state where the cartridge 190 is coupled to the holder 110, the interval between the upper side surface of the slope portion 84 along the circumferential direction of the inner cylinder portion 193 and the lower end of the projection portion 30 is in the circumferential direction of the cylindrical portion 193. It is larger than the width of the lower side surface of the horizontal plane part 82 along. With such a configuration, the protruding portion 30 can ride on the upper side surface of the slope portion 84 after the horizontal plane portion 12 is completely separated from the lower side surface of the horizontal plane portion 82.

  By rotating the cartridge 190 in the R2 direction (see FIG. 15) from the state where the cartridge 190 is connected to the holder 110, the removal of the cartridge 190 from the holder 110 proceeds. As shown in FIG. 15, a curved surface portion 31 that is curved so as to protrude toward the inclined surface portion 84 is formed on a part of the end surface of the protruding portion 30. The end surface on which the curved surface portion 31 is formed faces the slope portion 84 of the convex portion 80 when the cartridge 190 is removed from the holder 110. When the cartridge 190 is rotated in the R2 direction shown in FIG. 15 from the state of the holder 110 and the cartridge 190 shown in FIG. 14, the protruding portion 30 rides on the slope portion 84 above the lower end 77. A lower end 77 of the slope portion 84 is disposed on the upper surface 197 of the outer cylinder portion 192. At this time, the entire horizontal surface portion 12 is deviated from the position of the horizontal surface portion 82.

  As the rotation in the R2 direction is further continued, the curved surface portion 31 of the projection portion 30 moves obliquely from below to above along the circumferential direction of the inner cylinder portion 193 along the upper side surface of the slope portion 84. At this time, since the curved surface portion 31 slides along the slope portion 84, the protruding portion 30 can smoothly and smoothly move from the bottom to the top.

  Although not shown, between the lower ends of the protrusion 10 and the protrusion 30 shown in FIGS. 14 and 15 (that is, the bottom surface 111d of the outer cylindrical portion 111 of the holder 110) and the upper end 76 of the slope portion 84. The dimension along the vertical direction is a dimension equal to or larger than the dimension b between the upper end of the O-ring 62 and the lower end of the O-ring 61 described above. Thus, the user can easily remove the cartridge 190 from the holder 110 without applying much force.

  As the rotation in the R2 direction further proceeds, the curved surface portion 31 moves to a position above the upper end 76 of the slope portion 84 (see FIG. 16). At this position, the sheath portion 123 cancels the engagement with the O-rings 63 and 64, and the inner cylinder portion 112 cancels the engagement with the O-rings 61 and 62. In this way, the cartridge 190 is removed from the holder 110.

  As described above, the filter assembly 100 according to the first embodiment is a liquid processing device including the cartridge 190 for filtering water and the holder 110. The cartridge 190 includes a housing portion 191, an outer tube portion 192, an inner tube portion 193, a fitting portion 194, and a fitting portion 195 as a cylindrical portion having an upper end opened and a lower end closed. The holder 110 has an outer cylinder portion 111 and is connected to the upper end portion of the cartridge 190.

  The holder 110 has a protrusion 10 and a protrusion 30. The protruding portion 10 protrudes inward in the radial direction from the inner peripheral wall 111 w of the outer cylinder portion 111. The protrusion 30 is disposed at a position different from the position where the protrusion 10 is disposed in the circumferential direction of the outer cylinder portion 111, and protrudes inward in the radial direction from the inner peripheral wall 111w.

  The cartridge 190 has a convex portion 80 that protrudes outward in the radial direction from the outer peripheral wall of the inner cylinder portion 193 in the upper end portion. The convex portion 80 has a slope portion 81, a horizontal surface portion 82, and a slope portion 84. The slope 81 protrudes from the outer peripheral wall of the inner cylinder 193 and extends from the upper end 79 to the lower end of the cartridge 190 along the first circumferential direction of the inner cylinder 193 from the upper end 79 to the lower end 78. Extending diagonally. The horizontal surface portion 82 protrudes from the outer peripheral wall of the inner cylinder portion 193 and extends in the horizontal direction from the lower end 78 to the terminal end 75 along the first circumferential direction of the inner cylinder portion 193. The slope portion 84 protrudes from the outer peripheral wall of the inner cylinder portion 193 and is inclined obliquely from the upper end portion to the lower end portion along the first circumferential direction of the inner cylinder portion 193 from the upper end 76 to the lower end 77. It extends.

  In the filter assembly 100, when the cartridge 190 is attached to the holder 110, the protrusion 10 extends in the circumferential direction of the inner cylinder portion 193 along the lower side surface of the slope portion 81 from the upper side to the lower side of the cartridge 190. It moves smoothly in the direction of 1. Further, the protruding portion 10 is disposed on the lower side surface of the horizontal surface portion 82 by further moving in the circumferential direction along the lower side surface of the horizontal surface portion 82 from the lower end of the slope portion 81. Thereby, the inner cylinder part 193 of the cartridge 190 is connected to the inner peripheral wall 111w of the outer cylinder part 111 of the holder 110. In this way, the cartridge 190 and the holder 110 are fixed to each other.

  In the filter assembly 100, the protrusion 10 is in contact with the horizontal surface portion 82 of the convex portion 80 in a state where the cartridge 190 and the holder 110 are fixed. Therefore, unlike the connection by the spiral structure, the pressure inside the cartridge 190 is not converted into a force for rotating the cartridge 190 with respect to the holder 110. That is, according to the filter assembly 100, the cartridge 190 is prevented from being detached from the holder 110. Furthermore, the mold structure of the holder 110 and the cartridge 190 can be simplified as compared with the case where the spiral structure is configured between the upper end portion of the cartridge 190 and the outer cylinder portion 111 of the holder 110. Therefore, the cycle time for molding the holder 110 and the cartridge 190 can be shortened.

  Further, when the cartridge 190 is removed from the holder 110 in the filter assembly 100, the protruding portion 10 moves in the circumferential direction along the lower side surface of the horizontal surface portion 82. On the other hand, in this case, the projecting portion 30 smoothly slides on the upper side surface of the slope portion 84 obliquely from below to above along the circumferential direction of the inner cylinder portion 193. Thereby, the cartridge 190 can be easily detached from the holder 110.

  In this case, the protrusion 30 moves from the upper end to the upper end 76 with respect to the lower end 77 of the slope portion 84. In other words, the protrusion 30 is different from the position where the inclined surface portion 81 is arranged in the circumferential direction of the inner cylinder portion 193, and from the position where the horizontal plane portion 82 is arranged in the circumferential direction of the inner cylinder portion 193. Move to position. With this configuration, when the protrusion 10 is in contact with the horizontal surface portion 82 in the filter assembly 100, the protrusion 30 does not contact the slope portion 84. Therefore, the pressure inside the cartridge 190 is not converted into a force for rotating the holder 110 with respect to the cartridge 190. That is, according to the filter assembly 100, the cartridge 190 is prevented from being detached from the holder 110.

  In the filter assembly 100, when the holder 110 covers the cartridge 190, a part of the end surface of the protrusion 10 that faces the inclined surface 81 of the convex portion 80 is curved so as to protrude toward the inclined surface 81. A curved surface portion 11 is formed.

  According to this configuration, the curved surface portion 11 is curved so as to protrude toward the slope portion 81. Therefore, when the cartridge 190 is attached to the holder 110 in the filter assembly 100, the protrusion 10 can smoothly slide on the inclined surface 81 via the curved surface portion 11. In other words, when the cartridge 190 is attached to the holder 110 in the filter assembly 100, the protrusion 10 is more smoothly with respect to the cartridge 190, along the inclined portion 81 from the upper side to the lower side of the cartridge 190. 193 can be moved in the circumferential direction. Thus, according to this configuration, the cartridge 190 can be easily attached to the holder 110.

  In the filter assembly 100, when the cartridge 190 is removed from the holder 110, a curved surface that curves so as to protrude toward the inclined surface portion 84 is formed on a part of the end surface of the protruding portion 30 that faces the inclined surface portion 84 of the convex portion 80. A portion 31 is formed.

  According to this configuration, the curved surface portion 31 is curved so as to protrude toward the slope portion 84. Therefore, when the cartridge 190 is removed from the holder 110 in the filter assembly 100, the protrusion 30 can smoothly slide on the inclined surface 84 via the curved surface portion 31. That is, when the cartridge 190 is removed from the holder 110 in the filter assembly 100, the protrusion 30 is more smoothly with respect to the cartridge 190, along the inclined portion 84 from the lower side to the upper side of the cartridge 190. 193 can be moved in the circumferential direction. Thus, according to this configuration, the cartridge 190 can be easily detached from the holder 110.

  In the filter assembly 100, a horizontal surface portion 12 extending in a direction substantially parallel to a direction in which the horizontal surface portion 82 of the convex portion 80 extends when the holder 110 covers the cartridge 190 is formed on the protrusion portion 10.

  According to this configuration, when the holder 110 covers the cartridge 190, the upper side surface of the horizontal surface portion 12 of the protrusion portion 10 moves along the lower side surface of the horizontal surface portion 82 of the convex portion 80. 10 can move in the circumferential direction more smoothly with respect to the cartridge 190. In addition, according to this configuration, when the cartridge 190 is connected to the holder 110 in the filter assembly 100, the horizontal surface portion 12 is in contact with the horizontal surface portion 82. Thereby, it can restrict | limit more reliably that the pressure inside the cartridge 190 acts as a force with which the cartridge 190 is removed with respect to the holder 110.

  In the filter assembly 100, the holder 110 has two sets of protrusions 10 and protrusions 30. The protrusions 10 and the protrusions 30 are alternately arranged in the circumferential direction of the outer cylinder part 111. The cartridge 190 has two convex portions 80.

  According to this configuration, since the two protrusions 10 are in contact with the two horizontal surface portions 82, the cartridge 190 can be fixed to the holder 110 in a stable state. That is, according to this configuration, the position of the cartridge 190 is stabilized with respect to the holder 110. Further, the protrusion 10 can be moved more smoothly with respect to the inclined surface portion 81 than in the case where the number of the protrusions 10 is one. Compared with the case where the number of the protrusions 30 is one, the protrusions 30 can be moved more smoothly with respect to the inclined surface part 84.

The outer cylinder part 111 of the holder 110 has a cylindrical shape. Also, the filter assembly 100, the width W ₁₀ of the protrusion 10 along the circumferential direction of the outer tubular portion 111, the width W ₃₀ of the protrusion 30 along the circumferential direction of the outer tubular portion 111, out each The central angle of the cylindrical portion 111 is 45 degrees or less. Further, in the outer cylinder portion 111, the interval between the protruding portion 10 and the protruding portion 30 that are adjacent to each other in the circumferential direction of the outer cylinder portion 111 is larger than the length of the arc whose central angle is 45 degrees.

  According to this configuration, when the user of the filter assembly 100 begins to attach the cartridge 190 to the holder 110, there are four patterns in which the protrusion 10 or the protrusion 30 contacts the upper end of the convex portion 80. . Two of the four patterns are examples in which the protruding portion 10 contacts the upper end of the convex portion 80, and the remaining two patterns are cases in which the protruding portion 30 contacts the upper end of the convex portion 80. However, according to this configuration, even when the user brings the protrusion 10 or the protrusion 30 into contact with the upper end of the convex portion 80 without confirming the insertion position of the cartridge 190 with respect to the holder 110, the position The position where the cartridge is rotated about 45 degrees in either of the circumferential directions from the rotation direction can be determined as the rotation start position. The user can easily attach the cartridge 190 to the holder 110 by starting to rotate the cartridge 190 from this rotation start position. Therefore, according to this structure, the freedom degree of the insertion position of the upper end part of the cartridge 190 with respect to the outer cylinder part 111 of the holder 110 can be increased.

O-rings 61 and 62 are attached to the fitting portion 194 above the convex portion 80 on the outer peripheral wall of the upper end portion of the cartridge 190. In addition, a dimension a between the upper end 79 of the slope 81 and the upper end 78 of the horizontal plane part 82, a dimension b between the upper end of the O-ring 62 and the lower end of the O-ring 61, a lower end of the O-ring 61 and the slope part. 81 and the dimension d between the lower end of the inner peripheral wall 112 w and the upper end 11 p of the protrusion 10, there are relationships of a + c ≧ d, a ≧ b, and c ≦ d. It holds.

  According to this configuration, the sealing property between the holder 110 and the cartridge 190 can be ensured, so that it is possible to prevent water from leaking between the holder 110 and the cartridge 190. On the other hand, when the user attaches the cartridge 190 to the holder 110, when the O-rings 61 and 62 are attached to the inner peripheral wall 112w of the holder 110, a frictional force is generated between the inner peripheral wall 112w and the O-rings 61 and 62. Due to resistance. However, according to this configuration, when resistance is generated between the holder 110 and the O-rings 61 and 62, the circumferential direction of the inner cylinder portion 193 extends along the lower side surface of the slope portion 81 from the upper side to the lower side. The protrusion 10 can be moved. As described above, the user can move the protrusion 10 using the inclined surface portion 81 when resistance is generated between the holder 110 and the O-rings 61 and 62. Therefore, the user does not need to put an extremely large force in order to exert a force that can overcome the resistance. That is, the user can attach the cartridge 190 to the holder 110 without applying much force.

  In the filter assembly 100, the O-ring 63 and the O-ring 64 are attached to the fitting portion 195. The fitting portion 195 is disposed above the fitting portion 194 to which the O-rings 61 and 62 are attached. The dimension between the upper end of the O-ring 64 and the lower end of the O-ring 63 is the same as the dimension b between the upper end of the O-ring 62 and the lower end of the O-ring 61.

  According to this configuration, the O-ring 61 and the O-ring 62 and the O-ring 63 and the O-ring 64 can further prevent water from leaking between the holder 110 and the cartridge 190. Further, according to this configuration, when resistance is generated between the inner cylindrical portion 112 of the holder 110 and the O-rings 61 and 62 and between the sheath portion 123 and the O-rings 63 and 64, The protrusion 10 can be moved in the circumferential direction of the inner cylindrical portion 193 along the inclined surface portion 81 from the lower side to the lower side. Therefore, the user can attach the cartridge 190 to the holder 110 without applying much force.

  The liquid processing device is not limited to the one that filters water inside the cartridge 190, and may be any device that has a function of performing a predetermined processing inside the cartridge 190. For example, the filter assembly 100 may mix a plurality of types of liquids inside the cartridge 190, or may mix a gas or a solid substance with the liquid.

  In the filter assembly 100, a protrusion on the attachment side and a protrusion for removal may extend outward in the radial direction, and a convex portion of the cartridge 190 extends inward in the radial direction. May be. With such a configuration, the upper end of the cartridge 190 may be coupled to the holder 110.

  The shape of the outer peripheral wall of the cartridge 190 and the shape of the outer peripheral wall of the holder 110 are not limited to cylindrical shapes, but may be polygonal cylindrical shapes.

  The protrusion 10 and the protrusion 30 formed on the inner peripheral wall 111w of the holder 110 may be formed at different positions in the vertical direction. The position of the slope 81 and the position of the slope 84 along the vertical direction may be determined in accordance with the configuration of the projection 10 and the projection 30 formed at different positions in the vertical direction. In the case of this configuration, the slope portion 84 of the convex portion 80 extends along the circumferential direction of the inner cylinder portion 193 from a position different from the position where the horizontal plane portion 82 is disposed in the circumferential direction of the inner cylinder portion 193. It only has to extend obliquely from the upper side to the lower side to a position different from the position where the inclined surface part 81 is arranged in the circumferential direction of the inner cylinder part 193.

  In the filter assembly 100, the holder 110 has two sets of protrusions 10 and protrusions 30. However, the protrusion 10 and the protrusion 30 may be one set or three or more sets. The protrusions 10 and the protrusions 30 may be arranged alternately in the circumferential direction of the inner peripheral wall 111w of the outer cylinder part 111. The slope portion 84 is inclined from the upper side to the lower side along the circumferential direction of the inner cylinder portion 193 from a position different from the position where the horizontal plane portion 82 is arranged in the circumferential direction of the inner cylinder portion 193. What is necessary is just to extend to the position different from the position where the slope part 81 is arrange | positioned in the circumferential direction of the part 193.

(Second Embodiment)
As shown in FIG. 17, the shape of the protrusion on the attachment side is not limited to that of the first embodiment. 17 (A) to 17 (F) are diagrams showing the protrusions on the attachment side when the protrusions formed on the inner peripheral wall 111w of the outer cylinder 111 are viewed from the front as shown in FIG. is there. 17A to 17F, the shape of each protrusion on the attachment side is schematically shown. In addition, below, the same code | symbol is attached | subjected to the thing of the same structure as the filter assembly 100 which concerns on the said 1st Embodiment, and the description is abbreviate | omitted.

  In the example shown in FIG. 17A, an inclined surface portion 11a is formed on a part of the end surface of the protruding portion 10a. The inclined surface portion 11a is inclined with respect to the longitudinal direction and the circumferential direction of the outer cylinder portion 111 (see FIG. 9), and extends in a direction substantially parallel to the direction in which the inclined surface portion 81 (see FIG. 7) extends. The end surface on which the inclined surface portion 11 a is formed faces the inclined surface portion 81 when the holder 110 covers the cartridge 190. Further, a horizontal surface portion 12a extending in a direction substantially parallel to a direction in which the horizontal surface portion 82 (see FIG. 7) of the convex portion 80 extends when the holder 110 covers the cartridge 190 is formed on the protrusion portion 10a. .

  In the example shown in FIG. 17B, the protrusion 10b has a triangular prism shape. An inclined surface portion 11b that is inclined with respect to the longitudinal direction and the circumferential direction of the outer cylinder portion 111 and extends in a direction substantially parallel to the direction in which the inclined surface portion 81 extends is formed on a part of the end surface of the protruding portion 10b. Yes. The end surface on which the inclined surface portion 11 b is formed faces the inclined surface portion 81 when the holder 110 covers the cartridge 190. In addition, the protrusion part 10b does not have a horizontal surface part extended in the direction substantially parallel to the direction where the horizontal surface part 82 (refer FIG. 7) extends.

  In the example shown in FIG. 17C, the protrusion 10c has a cylindrical shape. A curved surface portion 10s that is curved so as to protrude toward the inclined surface portion 81 is formed on a part of the end surface of the protruding portion 10c. The end surface on which the curved surface portion 10s is formed faces the inclined surface portion 81 when the holder 110 covers the cartridge 190. In addition, the protrusion part 10c does not have a horizontal surface part extended in the direction substantially parallel to the direction where the horizontal surface part 82 is extended. However, the upper end 10 u of the protruding portion 10 c can move along the horizontal plane portion 82.

  In the example shown in FIG. 17D, a curved surface portion 11d that curves so as to protrude toward the inclined surface portion 81 is formed on a part of the end surface of the protruding portion 10d. The end surface on which the curved surface portion 11 d is formed faces the inclined surface portion 81 when the holder 110 covers the cartridge 190. Unlike the protrusion 10 of the filter assembly 100 according to the first embodiment, the curved surface 11d has a curved surface formed from the upper end to the lower end of the end face, that is, from the substantially central portion to the bottom of the protrusion 10d. Further, a horizontal surface portion 12d extending in a direction substantially parallel to a direction in which the horizontal surface portion 82 extends when the holder 110 covers the cartridge 190 is formed in the protrusion portion 10d.

  In the example shown in FIG. 17E, the protrusion 10e has a substantially quadrangular prism shape in which each vertex is formed in a curved surface shape. A curved surface portion 11e that curves so as to protrude toward the inclined surface portion 81 is formed on a part of the end surface of the protruding portion 10e including the apex of the substantially quadrangular prism. The end surface on which the curved surface portion 11e is formed faces the inclined surface portion 81 when the holder 110 covers the cartridge 190. Moreover, the vertical surface part 11es is formed in a part of end surface of the projection part 10e. The vertical surface portion 11es extends downward from the lower end of the upper curved surface portion 11e to the lower curved surface portion (reference number omitted). Furthermore, a horizontal surface portion 12e extending in a direction substantially parallel to the direction in which the horizontal surface portion 82 extends is formed on the protrusion 10e.

  In the example shown in FIG. 17F, the protrusion 10f has a pentagonal prism shape. An inclined surface portion 11f that is inclined with respect to the longitudinal direction and the circumferential direction of the outer cylinder portion 111 and extends in a direction substantially parallel to the direction in which the inclined surface portion 81 extends is formed on a part of the end surface of the protruding portion 10f. Yes. The end surface on which the inclined surface portion 11f is formed faces the inclined surface portion 81 when the holder 110 covers the cartridge 190. The inclined surface portion 11f is formed on the upper side of the end surface. Further, a vertical surface portion 11fs is formed on a part of the end surface of the protruding portion 10f. The vertical surface portion 11fs extends downward from the lower end of the inclined surface portion 11f. The vertical surface portion 11fs is formed to match the shape of the stopper surface 83 (see FIG. 7) of the convex portion 80. Further, a horizontal surface portion 12f extending in a direction substantially parallel to the direction in which the horizontal surface portion 82 extends when the holder 110 covers the cartridge 190 is formed on the protrusion portion 10f.

  According to the example shown in FIGS. 17C, 17 </ b> D, and 17 </ b> E, the curved surface portions 10 s, 11 d, and 11 e are curved so as to protrude toward the slope portion 81. Therefore, when the cartridge 190 is attached to the holder 110 in the filter assembly 100 (see FIG. 5), the projecting portions 10c, 10d, and 10e smoothly slide on the inclined surface portion 81 via the curved surface portions 10s, 11d, and 11e. Can do. That is, when the cartridge 190 is attached to the holder 110 in the filter assembly 100, the protrusions 10c, 10d, and 10e are more smoothly formed on the inclined surface 81 from the upper side to the lower side of the cartridge 190. It can move along the circumferential direction of the inner cylinder portion 193 (see FIG. 5). As described above, according to the configuration of the example shown in FIGS. 17C, 17 </ b> D, and 17 </ b> E, the cartridge 190 can be easily attached to the holder 110.

  According to the example shown in FIGS. 17A, 17B, and 17F, each inclined surface portion 11a, 11b, 11f extends in a direction substantially parallel to the direction in which the inclined surface portion 81 extends. Therefore, when the cartridge 190 is attached to the holder 110 in the filter assembly 100, the projecting portions 10a, 10b, and 10f can smoothly slide on the inclined surface portion 81 through the inclined surface portions 11a, 11b, and 11f. That is, when the cartridge 190 is attached to the holder 110 in the filter assembly 100, the protrusions 10a, 10b, and 10f are more smoothly with respect to the cartridge 190 along the inclined surface portion 81 from the upper side to the lower side of the cartridge 190. The inner cylinder portion 193 can move in the circumferential direction. As described above, according to the configuration of the example shown in FIGS. 17A, 17 </ b> B, and 17 </ b> F, the cartridge 190 can be easily attached to the holder 110.

  17A, 17D, 17E, and 17F, when the cartridge 190 is coupled to the holder 110 in the filter assembly 100, the protrusions 10a, 10d, 10e, and 10f. The horizontal plane portions 12a, 12d, 12e, and 12f are in contact with the horizontal plane portion 82. Thereby, it can restrict | limit more reliably that the pressure inside the cartridge 190 acts as a force with which the cartridge 190 is removed with respect to the holder 110.

(Third embodiment)
As shown in FIG. 18, the shape of the protrusion on the removal side is not limited to that of the first embodiment. 18 (A) to 18 (F) are diagrams showing the protrusions on the removal side when the protrusions formed on the inner peripheral wall 111w of the outer cylinder 111 are viewed from the front as shown in FIG. is there. 18A to 18F, the shape of each protrusion on the removal side is schematically shown. 18A to 18F may be used in the filter assembly 100 (see FIG. 1) in combination with any of the examples of the protrusions of the second embodiment. . In addition, below, the same code | symbol is attached | subjected to the thing of the same structure as the filter assembly 100 concerning the said 1st Embodiment, and the description is abbreviate | omitted.

  In the example shown in FIG. 18A, an inclined surface portion 31a is formed on a part of the end surface of the protruding portion 30a. The inclined surface portion 31a is inclined with respect to the longitudinal direction and the circumferential direction of the outer cylinder portion 111 (see FIG. 9), and extends in a direction substantially parallel to the direction in which the inclined surface portion 84 (see FIG. 7) extends. The end surface on which the inclined surface portion 31 a is formed faces the inclined surface portion 84 when the cartridge 190 is removed from the holder 110.

  In the example shown in FIG. 18B, the protrusion 30b has a triangular prism shape. An inclined surface portion 31b that is inclined with respect to the longitudinal direction and the circumferential direction of the outer cylindrical portion 111 and extends in a direction substantially parallel to the direction in which the inclined surface portion 84 extends is formed on a part of the end surface of the protruding portion 30b. Yes. The end surface on which the inclined surface portion 31 b is formed faces the inclined surface portion 84 when the cartridge 190 is removed from the holder 110.

  In the example shown in FIG. 18C, the protrusion 30c has a cylindrical shape. Therefore, a curved surface portion 30 s that curves toward the inclined surface portion 84 is formed on the end surface of the protruding portion 30 c that faces the inclined surface portion 84 when the cartridge 190 is removed from the holder 110.

  In the example shown in FIG. 18D, a curved surface that curves so as to protrude toward the slope portion 84 is formed on a part of the end face of the protrusion 30 d that faces the slope portion 84 when the cartridge 190 is removed from the holder 110. A portion 31d is formed. Unlike the protrusion 30 of the filter assembly 100 according to the first embodiment, the curved surface 31d has a curved surface formed from the upper end to the lower end of the end face, that is, from the substantially central portion to the top of the protrusion 30d.

  In the example shown in FIG. 18E, the protrusion 30e has a substantially quadrangular prism shape in which each vertex is formed in a curved surface shape. A curved surface portion 31e that is curved so as to protrude toward the inclined surface portion 84 is formed on a part of the end surface of the protruding portion 30e including the apex of the substantially quadrangular prism. The end surface on which the curved surface portion 31 e is formed faces the inclined surface portion 84 when the cartridge 190 is removed from the holder 110. Moreover, the vertical surface part 31es is formed in a part of end surface of the protrusion part 30e. The vertical surface portion 31es extends upward from the upper end of the lower curved surface portion 31e to the upper curved surface portion (reference number omitted).

  In the example shown in FIG. 18F, the protrusion 30f has a pentagonal prism shape. An inclined surface portion 31f that is inclined with respect to the longitudinal direction and the circumferential direction of the outer cylinder portion 111 and extends in a direction substantially parallel to the direction in which the inclined surface portion 84 extends is formed on a part of the end surface of the protruding portion 30f. Yes. The end surface on which the inclined surface portion 31 f is formed faces the inclined surface portion 84 when the cartridge 190 is removed from the holder 110. The inclined surface portion 31f is formed below the end surface. Further, a vertical surface portion 31fs is formed on a part of the end surface of the protruding portion 30f. The vertical surface portion 31fs extends upward from the upper end of the inclined surface portion 31f.

  According to the example shown in FIGS. 18A, 18B, and 18F, each inclined surface portion 31a, 31b, 31f extends in a direction substantially parallel to the direction in which the inclined surface portion 84 extends. Therefore, when the cartridge 190 is removed from the holder 110 in the filter assembly 100, the projecting portions 30a, 30b, and 30f can smoothly slide on the inclined surface portion 84 through the inclined surface portions 31a, 31b, and 31f. In other words, when the cartridge 190 is removed from the holder 110 in the filter assembly 100, the protrusions 30a, 30b, and 30f are more smoothly with respect to the cartridge 190 along the inclined surface portion 84 from the lower side to the upper side of the cartridge 190. The inner cylinder portion 193 can move in the circumferential direction. As described above, according to the configuration of the example shown in FIGS. 18A, 18 </ b> B, and 18 </ b> F, the cartridge 190 can be easily detached from the holder 110.

  According to the example shown in FIGS. 18C, 18 </ b> D, and 18 </ b> E, the curved surface portions 30 s, 31 d, and 31 e are curved so as to protrude toward the slope portion 84. Therefore, when the cartridge 190 is removed from the holder 110 in the filter assembly 100, the projecting portions 30c, 30d, and 30e can smoothly slide on the inclined surface portion 84 through the curved surface portions 30s, 31d, and 31e. That is, when the cartridge 190 is removed from the holder 110 in the filter assembly 100, the protrusions 30 c, 30 d, and 30 e are more smoothly along the inclined surface portion 84 from the lower side to the upper side of the cartridge 190. The inner cylinder portion 193 can move in the circumferential direction. Thus, according to the configuration of the example shown in FIGS. 18C, 18 </ b> D, and 18 </ b> E, the cartridge 190 can be easily detached from the holder 110.

(Fourth embodiment)
FIGS. 19A to 19D show an example of each attachment-side protrusion and each removal-side protrusion, in which the attachment-side protrusion is connected to the attachment-side protrusion. In other words, the attachment-side protrusion may also serve as the removal-side protrusion, or the attachment-side protrusion may also serve as the removal-side protrusion.

  19A to 19D, the shape of each protrusion (hereinafter simply referred to as a connection protrusion) in which the removal-side protrusion is connected to the attachment-side protrusion is schematically shown. FIGS. 19A to 19D are diagrams showing the connection protrusions when the connection protrusions formed on the inner peripheral wall 111w of the outer cylinder part 111 are viewed from the front as shown in FIG. . In addition, below, the same code | symbol is attached | subjected to the thing of the same structure as the filter assembly 100 which concerns on the said 1st Embodiment, and the description is abbreviate | omitted.

  In the example shown in FIG. 19A, a curved surface portion 21a that is curved so as to protrude toward the inclined surface portion 81 (see FIG. 7) is formed on a part of the end surface of the connection projection portion 20a. The end surface on which the curved surface portion 21 a is formed faces the inclined surface portion 81 when the holder 110 covers the cartridge 190. Unlike the protrusion 10 of the filter assembly 100 according to the first embodiment, the curved surface 21a is formed with a curved surface from the upper end to the lower end of the end surface, that is, from approximately the center to the bottom of the connection protrusion 20a. Further, the connection projection 20a is formed with a horizontal surface portion 22a extending in a direction substantially parallel to a direction in which the horizontal surface portion 82 (see FIG. 7) extends when the holder 110 covers the cartridge 190.

  In the example shown in FIG. 19A, a part of the other end surface of the connection projection 20a that faces the sloped portion 84 (see FIG. 7) when the cartridge 190 is removed from the holder 110 faces the sloped portion 84. A curved surface portion 23a that is curved so as to protrude is formed. Unlike the protrusion 30 of the filter assembly 100 according to the first embodiment, the curved surface 23a is curved from the lower end to the upper end of the other end surface, that is, from the substantially central portion of the connection protrusion 20a to the horizontal plane portion 22a. ing.

  In the example shown in FIG. 19B, a part of the end surface of the connecting projection 20b that faces the slope 81 when the holder 110 covers the cartridge 190 is curved so as to protrude toward the slope 81. A curved surface portion 21b is formed. Further, the connection protrusion 20b is formed with a horizontal surface portion 22b extending in a direction substantially parallel to the direction in which the horizontal surface portion 82 extends when the holder 110 covers the cartridge 190. A curved surface portion 23b that curves so as to protrude toward the slope portion 84 is formed on a part of the other end face of the connection projection 20b that faces the slope portion 84 when the cartridge 190 is removed from the holder 110. .

  In the example shown in FIG. 19C, the connection protrusion 20c has a substantially quadrangular prism shape in which the cross-sectional shape of the connection protrusion 20c is a parallelogram. A part of the end surface of the connection projection 20c that faces the inclined surface 81 when the holder 110 covers the cartridge 190 is inclined with respect to the longitudinal direction and the circumferential direction of the outer cylinder 111 (see FIG. 9). And the inclined surface part 21c extended in the direction substantially parallel to the direction where the slope part 81 is extended is formed. Further, the connection protrusion 20c is formed with a horizontal surface portion 22c extending in a direction substantially parallel to the direction in which the horizontal surface portion 82 extends when the holder 110 covers the cartridge 190. An inclined surface portion 23c is formed on a part of the other end surface of the connection projection 20c that faces the inclined surface portion 84 when the cartridge 190 is removed from the holder 110. The inclined surface portion 23c is inclined with respect to the longitudinal direction and the circumferential direction of the outer cylinder portion 111, and extends in a direction substantially parallel to the direction in which the inclined surface portion 84 extends. In addition, each vertex of the connection protrusion part 20c may be formed in the curved surface shape.

  In the example shown in FIG. 19D, the longitudinal direction and the circumferential direction of the outer cylinder portion 111 are formed on a part of the end surface of the connection projection 20 d that faces the inclined surface portion 81 when the holder 110 covers the cartridge 190. An inclined surface portion 21d that is inclined with respect to the surface and extends in a direction substantially parallel to the direction in which the inclined surface portion 81 extends is formed. The inclined surface portion 21d is formed on the upper side of the end surface. Further, a vertical surface portion 21ds is formed on a part of the end surface of the connection projection 20d. The vertical surface portion 21ds extends downward from the lower end of the inclined surface portion 21d. The vertical surface portion 21ds is formed to match the shape of the stopper surface 83 (see FIG. 7) of the convex portion 80. Furthermore, a horizontal surface portion 22d extending in a direction substantially parallel to the direction in which the horizontal surface portion 82 extends when the holder 110 covers the cartridge 190 is formed in the connection protrusion 20d.

  In the example shown in FIG. 19D, the longitudinal direction and the circumference of the outer cylinder portion 111 are formed on a part of the other end face of the connection projection portion 20d that faces the slope portion 84 when the cartridge 190 is removed from the holder 110. An inclined surface portion 23d that is inclined with respect to the direction and extends in a direction substantially parallel to the direction in which the inclined surface portion 84 extends is formed. The inclined surface portion 23d is formed below the other end surface. Further, a vertical surface portion 23ds is formed on a part of the other end surface of the connection projection 20d. The vertical surface portion 23ds extends upward from the upper end of the inclined surface portion 23d.

  When any one of the connection protrusions shown in FIGS. 19A to 19D is arranged on the inner peripheral wall 111w (see FIG. 8), each is arranged at equal intervals on the inner peripheral wall 111w. It is preferable. Further, a plurality of connection protrusions may be arranged on the inner peripheral wall 111w by combining any one of the examples shown in FIGS. 19 (A) to 19 (D). Any one of the examples shown in FIG. 5 may be arranged on the inner peripheral wall 111w.

  It is preferable that the number of connection protrusions arranged on the inner peripheral wall 111w is a number from one to four. On the other hand, the number of convex portions 80 of the cartridge 190 is the same as the number of connection protrusions. As shown in the examples shown in FIGS. 19A to 19D, according to the connection protrusion in which the removal-side protrusion is connected to the attachment-side protrusion, the user starts rotation of the cartridge 190 relative to the holder 110. The cartridge 190 can be attached to the holder 110 without confirming the position. Therefore, the holder 110 and the cartridge 190 may not have the marks 91 and 92 (see FIG. 10), respectively.

  The embodiment disclosed above should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above embodiments but by the scope of claims, and includes all modifications and variations within the meaning and scope equivalent to the scope of claims.

10: protrusion, 11: curved surface, 11a, 11b, 11f: inclined surface, 12: horizontal surface, 30: protrusion, 31: curved surface, 31a, 31b, 31f: inclined surface, 61, 62, 63, 64 : O-ring, 80: Convex part, 81: Slope part, 82: Horizontal part, 84: Slope part, 100: Filter assembly, 110: Holder, 111: Outer cylinder part, 111w: Inner peripheral wall, 190: Cartridge, 192 : Outer cylinder part, 193: Inner cylinder part

Claims (9)

A liquid having a cylindrical portion having one end opened and the other end closed, and a cartridge for filtering liquid, and a holder connected to the one end of the cartridge having a cylindrical portion A filter ,
The holder has a first protrusion protruding radially inward from an inner peripheral wall of the tubular portion, and a position different from a position where the first protrusion is disposed in the circumferential direction of the tubular portion. A second protrusion projecting radially inward from the inner peripheral wall, and a position facing the first protrusion of the inner peripheral wall of the cylindrical part on the outer peripheral wall of the cylindrical part. And a first mark for indicating a starting position of rotation of the cartridge with respect to the holder ,
The cartridge is disposed in a gap between two convex portions projecting radially outward from an outer peripheral wall of the one end portion of the cylindrical portion, and the two convex portions in the circumferential direction of the cartridge. A second mark for indicating a starting position of rotation of the cartridge with respect to
The convex portion is
Projecting from the outer peripheral wall and obliquely from the one end to the other end along the first circumferential direction of the cylindrical portion from the first position to the second position of the outer peripheral wall A first slope portion extending;
A horizontal surface portion that protrudes from the outer peripheral wall and extends in the horizontal direction along the first direction in the circumferential direction of the cylindrical portion from the second position to the third position of the outer peripheral wall;
Projecting from the outer peripheral wall and obliquely from the one end to the other end along the first direction in the circumferential direction of the cylindrical portion from the fourth position to the fifth position of the outer peripheral wall and a second inclined surface portion extending,
The width of the first protrusion along the circumferential direction of the tubular portion and the width of the second protrusion along the circumferential direction of the tubular portion are the central angles of the tubular portion, respectively. Is less than or equal to the arc length of 45 degrees,
An interval along the circumferential direction of the cylindrical portion between the first protruding portion and the second protruding portion adjacent to each other in the cylindrical portion is larger than a length of an arc whose central angle is 45 degrees. ,
Liquid filter . A part of the end surface of the first projecting portion that faces the first slope portion of the convex portion when the holder covers the cartridge projects toward the first slope portion. The liquid filter according to claim 1, wherein a curved surface portion that is curved is formed. In the longitudinal direction and the circumferential direction of the cylindrical portion, a part of the end surface of the first protruding portion facing the first inclined surface portion of the convex portion when the holder covers the cartridge The liquid filter according to claim 1, wherein an inclined surface portion that is inclined with respect to the first inclined surface portion and extends in a direction substantially parallel to the extending direction of the first inclined surface portion is formed. When the cartridge is removed from the holder, a part of an end surface of the second projecting portion facing the second slope portion of the convex portion protrudes toward the second slope portion. A curved surface portion is formed,
The liquid filter according to any one of claims 1 to 3. When the cartridge is removed from the holder, a part of the end surface of the second projecting portion facing the second inclined surface portion of the convex portion has a longitudinal direction and a circumferential direction of the cylindrical portion. The liquid filter according to any one of claims 1 to 3, wherein an inclined surface portion that is inclined and extends in a direction substantially parallel to a direction in which the second inclined surface portion extends is formed. The first protrusion is formed with a horizontal surface portion extending in a direction substantially parallel to a direction in which the horizontal surface portion of the convex portion extends when the holder covers the cartridge.
The liquid filter according to any one of claims 1 to 5. The holder has two sets of the first protrusion and the second protrusion,
In the circumferential direction of the cylindrical portion, the first protrusions and the second protrusions are alternately arranged,
The tubular portion of the holder has a cylindrical shape,
The liquid filter according to any one of claims 1 to 6 . A seal member is attached to the one end portion side of the outer peripheral wall of the one end portion of the cartridge rather than the convex portion.
The holder has another cylindrical portion disposed on the one end side with respect to the cylindrical portion,
Dimension a between the one end side end of the first slope portion of the convex portion and the one end side end of the horizontal surface portion, the one end side end and the other end side end of the seal member A dimension b between the other end portion side end of the seal member and the first slope side end of the first slope portion, and the inner peripheral wall of the other cylindrical portion. The relationship of a + c ≧ d, a ≧ b, and c ≦ d holds between the dimension d between the other end side end and the one end side end of the first protrusion.
The liquid filter according to any one of claims 1 to 7 . In the one end portion of the cartridge, another seal member is disposed on the one end portion side of the seal member, and the dimension between the one end side end and the other end side end of the other seal member is , The same dimension as the one end side end and the other end side end of the seal member,
The liquid filter according to claim 8 .

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