JP2007246247A - Bobbin and ink sheet cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bobbin easily tensely installable between two wall surfaces with an axial tension imparted thereto by using a spring member. <P>SOLUTION: A shaft member 26A on which a shaft part 26a is formed is so fitted to a fitting part 24 formed at the end of a shaft body 23 that the axial length of the bobbin 20 can be extended/retracted by sliding them with the spring member 27 interposed therebetween. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bobbin that is held in a state where an axial tension is applied between two wall surfaces and is rotatably supported, and an ink sheet cartridge that houses the bobbin.

  In general, a line thermal printer having a long thermal head in which heating elements are arranged and arranged along the width direction of a recording sheet is used as a recording apparatus that quickly records each line or page on the recording sheet. ing. In such a line thermal printer, a bobbin in which a long ink sheet having a continuous colored region composed of colored portions such as yellow, magenta, and cyan is wound in a roll shape is supported in a cartridge case. Yes.

  The bobbin is formed on, for example, a cylindrical shaft body around which the ink sheet is wound, a support shaft formed on one end side of the shaft body, and a drive connected to a printer drive system. It consists of a shaft.

  In the ink sheet cartridge that houses the bobbin having such a conventional configuration, a spring member for preventing the slack of the ink sheet is interposed between the bobbin and the cartridge case, and the bobbin is pressed in the axial direction by the spring member. By doing so, the other end side of the bobbin is brought into contact with the side wall of the cartridge case, so that the bobbin is prevented from idling and not loosened in the ink sheet when not attached to the printer.

JP 2002-86828 A

  However, as described above, in the ink sheet cartridge in which the spring member for preventing the slack of the ink sheet is interposed between the bobbin and the cartridge case, the used ink sheet is replaced with an unused ink sheet. When the bobbin is taken out of the cartridge case, even the spring member comes off, or when the bobbin is assembled into the cartridge case, the spring member has to be pressed with a finger.

  In this way, not only the ink sheet cartridge but also, for example, a facsimile using thermal paper, an axial tension is applied between the two wall surfaces using a spring member that is not incorporated in the bobbin. It was very troublesome and time-consuming to hold the bobbin in a state and pivotally support it.

  Furthermore, in the bobbin in which the shaft main body and the flanges disposed at both ends of the shaft main body are integrally formed, the entire bobbin is formed of the same material. In general, other members are also formed using materials that match the characteristics of the members that require the most rigidity. Therefore, in the bobbin, the shaft portion is also made of a material that is appropriate for the shaft body where the winding tension is applied. It is formed. However, since the shaft portion does not need to be as rigid as the shaft main body, originally, it is easier to mold and use inexpensive materials.

  Therefore, the present invention uses a spring member, a bobbin that can be easily held between two wall surfaces in a state where an axial tension is applied, and that can prevent the spring member from being lost, By using this bobbin, an object of the present invention is to provide an ink sheet cartridge in which the cartridge case can be reused and resources can be effectively used, and the running cost can be reduced.

  In order to achieve the above-described object, the bobbin of the present invention is characterized in that it is a bobbin that is held in a state where an axial tension is applied between two wall surfaces and is rotatably supported, and is provided at one end. A shaft member formed with the other shaft portion is interposed in the fitting portion of the outer cylindrical cylindrical body having one shaft portion formed integrally and a fitting portion formed at the other end. The length of the bobbin in the axial direction is fitted so that it can be expanded and contracted.

  The bobbin of the present invention having such a characteristic point is formed by pressing the spring member, which is interposed by sliding the shaft member, against its elastic restoring force and reducing the axial length of the two bobbins. By inserting between the wall surfaces, and then releasing the pressure of the spring member, the axial length of the bobbin is extended using the elastic restoring force of the spring member, and the bobbin is sandwiched between the two wall surfaces. By doing so, an axial tension can be applied to the bobbin.

  Another feature of the bobbin of the present invention is that the shaft members are respectively fitted to the fitting portions formed at both ends of the outer cylindrical body of the shaft, and the axial tension is provided between the two wall surfaces. A bobbin that is held in a given state and is rotatably supported, and at least one of the shaft members is slid by interposing a spring member between the end of the shaft body. The axial length of the bobbin is fitted to be extendable.

  Even in the bobbin of the present invention having such a feature point, two spring members in which the shaft member is slid and pressed against the elastic restoring force and the length in the axial direction is shortened are two pieces. And then releasing the pressure of the spring member to increase the axial length of the bobbin using the elastic restoring force of the spring member, and the bobbin between the two wall surfaces. By clamping, an axial tension can be applied to the bobbin.

  In the bobbin of the present invention, the spring member can be interposed between the shaft members at both ends of the shaft body, or between the shaft members at either one end. It is also possible to make it.

  In addition, the bobbin is formed by combining individual components such as the shaft main body, the two shaft members, and the spring member, so that each component member is formed of a material corresponding to the characteristics required for its operation and application. This makes it an excellent product, and it is possible to save unnecessary costs by examining materials and devising processing methods from an economic point of view. be able to.

  The ink sheet cartridge of the present invention is characterized in that the bobbin having the above-described configuration in which the ink sheet is wound in a roll shape around the shaft main body is disposed between the driving side wall portion and the supporting side wall portion of the cartridge case. It is in a point that is pivotally supported by the shaft.

  In an ink sheet cartridge having such a characteristic point, a semi-open type cartridge is obtained by being sandwiched between a driving side wall portion and a supporting side wall portion using a tension applied by a spring member provided by the ink sheet cartridge. The case can be held and the structure of the cartridge case can be simplified.

  As described above, the bobbin of the present invention can be easily held between two wall surfaces in a state where an axial tension is applied using a spring member, and can prevent the spring member from being lost. Furthermore, it can be manufactured at low cost.

  In addition, the ink sheet cartridge of the present invention makes it easy to replace the ink sheet by using this bobbin, enables reuse of the cartridge case to achieve effective use of resources, and low running costs. It has an excellent effect of becoming.

  The bobbin of the present invention is held in a state where an axial tension is applied between two wall surfaces and is rotatably supported. Hereinafter, two embodiments will be described.

  As shown in FIGS. 1 and 2, the bobbin 20 according to the first embodiment of the present invention has an outer cylindrical shaft body 23 around which a sheet-like object such as an ink sheet or recording paper is wound. In addition, a support shaft portion 25 as one shaft portion of the bobbin 20 is integrally formed at one end portion of the shaft body 23.

  In the present embodiment, the support shaft portion 25 is formed so as to extend coaxially with the shaft main body 23, and is supported by one bearing portion (not shown). The shaft main body 23 and the support shaft 25a And a flange-like flange 25b having a diameter larger than that of the shaft main body 23.

  The other end of the shaft body 23 is fitted with a concave body side fitting portion 24 (body drive) for fitting a drive shaft member 26A formed with a drive shaft 26a as the other shaft portion of the bobbin 20. A side fitting portion 24b) is formed. On the inner wall surface of the main body side fitting portion 24, a groove-shaped main body side engaging portion 24d for slidably fitting a convex shaft side engaging portion 26d formed on the drive shaft member 26A is formed. Yes.

  The drive shaft member 26A includes a flange-shaped flange 26b having a larger diameter than the shaft main body 23, a drive shaft 26a formed on one side of the flange 26b and supported by the other bearing portion (not shown). And an annular shaft-side fitting portion 26c formed on the other surface side of the flange 26 and fitted into the concave body-side fitting portion 24 (24b) of the shaft body 23. On the outer wall surface of the annular drive shaft side fitting portion 26c, a convex shaft side engaging portion 26d that is slidably fitted into the groove-shaped main body side engaging portion 24d is formed.

  Then, the shaft side fitting portion 26c of the drive shaft member 26A is inserted into the main body side engaging portion 24d while the coiled spring member 27 is interposed in the concave portion of the main body side fitting portion 24. The drive shaft portion 26 of the bobbin 20 is configured by engaging the engaging portion 26d so as to be engaged, and the bobbin 20 is fitted between the shaft main body 23 and the drive shaft member 26A. The axial length of the bobbin can be expanded and contracted by sliding the portion in the axial direction.

  In the bobbin 20 of the present embodiment having such a configuration, a spring member 27 disposed in the recess of the main body side fitting portion 24 and interposed between the shaft main body 23 and the drive shaft member 26A is provided. Then, it is pressed against the elastic restoring force, and is inserted between the two wall surfaces to be arranged in a state where the axial length of the bobbin 20 is shortened, and subsequently, the elastic restoring force of the spring member 27 is used. By extending the length of the bobbin 20 in the axial direction, the bobbin 20 can be sandwiched with an axial tension applied between the two wall surfaces. Further, a bearing shaft formed on each of the two wall surfaces is supported by a support shaft 25a formed integrally with the shaft main body 23 and a drive shaft 26a formed on a drive shaft member 26A. By connecting a drive system (not shown) to 26a, the shaft side engaging portion 26d can transmit the rotational driving force to the main body side engaging portion 24d so as to be rotatable.

  Thus, the bobbin 20 of the present embodiment can be easily held between the two wall surfaces in a state where the axial tension is applied using the spring member 27. Moreover, since the spring member 27 is disposed in the bobbin 20, the spring member 27 is not lost when the bobbin 20 is detached, and the risk of the spring member 27 coming off and jumping out can be avoided. .

  Subsequently, the bobbin of the second embodiment will be described.

  As shown in FIG. 3, the bobbin of the second embodiment has an outer cylindrical shaft body 23 around which a sheet-like object such as an ink sheet or recording paper is wound. A concave fitting portion 24 (main body support side fitting portion 24a) for fitting a support shaft member 25A on which a support shaft 25a as one shaft portion of the bobbin 20 is formed at both ends, and the bobbin 20 A concave fitting portion 24 (main body drive side fitting portion 24b) for fitting the drive shaft member 26A on which the drive shaft 26a as the other shaft portion is formed is formed. In the present embodiment, groove-like main body side engaging portions 24d extending in the axial direction of the bobbin 23 are formed on the inner wall surfaces of the main body supporting side fitting portion 24a and the main body driving side fitting portion 24b, respectively. ing.

  Here, the support shaft member 25A is formed with a flange-like flange 25b having a diameter larger than that of the shaft main body 23, and formed on one side of the flange 25b, and is supported by one bearing portion (not shown). The shaft 25a and an annular shaft-side fitting portion 25c formed on the other surface side of the flange 25b and fitted into the concave body-supporting-side fitting portion 24a of the shaft body 23 are configured. On the outer wall surface of the annular shaft-side fitting portion 25c, a convex shaft-side engaging portion 25d that is slidably engaged with the groove-shaped main body-side engaging portion 24d is formed. .

  Then, the support shaft portion of the bobbin 20 is fitted by fitting the shaft-side fitting portion 25c of the support shaft member 25A so that the shaft-side engagement portion 26d is engaged with the body-side engagement portion 24d. 25 is configured.

  Similarly, the drive shaft member 26A is formed on the one surface side of the flange 26b having a larger diameter than the shaft main body 23, and on the other bearing portion (not shown). The shaft 26 a and an annular shaft-side fitting portion 26 c formed on the other surface side of the flange 26 b and fitted into the concave body drive-side fitting portion 24 b of the shaft body 23 are configured. On the outer wall surface of the annular shaft-side fitting portion 26c, a convex shaft-side engaging portion 26d that is slidably fitted into the groove-like body-side engaging portion 24b is formed. .

  Then, the shaft side fitting portion 26c of the drive shaft member 26A is inserted into the main body side engaging portion 24d while the coiled spring member 27 is interposed in the concave portion of the main body side fitting portion 24. The drive shaft portion 26 of the bobbin 20 is configured by engaging the engaging portion 26d so as to be engaged, and the bobbin 20 is fitted between the shaft main body 23 and the drive shaft member 26A. The axial length of the bobbin 20 can be expanded and contracted by sliding the portion in the axial direction.

  Also in the bobbin 20 of this embodiment having such a configuration, the spring member acts similarly to the above-described first embodiment, and the same effect can be obtained. In particular, by forming the shaft body and the two shaft members separately without forming the bobbin integrally, and combining them to form a finished product, each member has the characteristics required for its function and application. Because it can be formed with materials according to the product, it will be excellent as a product, and it will be possible to eliminate wasteful costs by examining the materials and devising processing methods from an economical viewpoint, Disposal can also be performed easily and appropriately.

  Next, an embodiment in which the bobbin of the second embodiment is mounted as an ink sheet cartridge of the present invention will be described with reference to FIGS.

  The ink sheet cartridge according to the present embodiment includes two bobbins 20 (21, 22) having the above-described configuration, in which the ink sheet is wound in a roll shape, and a driving side wall portion and a supporting side wall facing the cartridge case. And an ink sheet cartridge having a configuration in which the shaft is rotatably supported between the first and second portions.

  As shown in FIG. 4, the ink sheet cartridge 1 includes an ink sheet unit 2 and a cartridge case 3 that houses the ink sheet unit 2.

  The ink sheet unit 2 is a long ink sheet (not shown; the same applies hereinafter) in which colored regions including colored portions of yellow (Y), magenta (M), and cyan (C) are continuously formed. And a sheet supply bobbin 21 in which the ink sheet is wound from one end side, and a sheet take-up bobbin 22 in which the ink sheet is wound from the other end side.

  The sheet supply bobbin 21 and the sheet take-up bobbin 22 have the configuration shown in the second embodiment of the bobbin of the present invention described above. Further, in this embodiment, as shown in FIG. A plurality of rectangular-shaped rectangular grooves 26f as fitting portions are formed on the surface of the flange 26b provided on the drive shaft member 26A where the drive shaft 26a is formed. They are arranged radially.

  An unused ink sheet is wound around one end side of the shaft main body 23 of the sheet supply bobbin 21, and the ink sheet is wound around the shaft main body 23 of the sheet winding bobbin 22 from the other end side. Has been.

  The cartridge case 3 has an opening for bringing a recording unit of a printer (not shown) in contact with an ink sheet stretched between the sheet supply bobbin 21 and the sheet take-up bobbin 22 at the center thereof. It has one case base 31 in which 32 is formed.

  In the present embodiment, the case base 31 is made of a substantially plate-like member made of resin, and the window frame-shaped opening 32 is formed at the center thereof. Both end portions of the case base 31 are bent into a semi-cylindrical shape, one being a sheet supply-side dome portion 33 for storing the sheet supply bobbin 21 together with the wound ink sheet, and the other being wound. The sheet take-up dome portion 34 accommodates the sheet take-up bobbin 22 together with the ink sheet.

  Further, on both side portions of the case base 31, support side wall portions that rotatably support a support shaft member 25A provided on one end side of the sheet supply bobbin 21 and the sheet take-up bobbin 22, respectively. 37 and drive side wall portions 35 and 36 that rotatably support a drive shaft member 26A provided on the other end side of each of the sheet supply bobbin 21 and the sheet take-up bobbin 22 are suspended. .

  Specifically, the drive-side side wall portions 35 and 36 in the present embodiment are formed on one side portion of the case base 31, and have a substantially circular outer shape that is suspended from the sheet supply-side dome portion 33. The driving side wall portion 35 and a driving side side wall portion 36 having a substantially circular outer shape that is suspended from the sheet winding side dome portion 34 are provided.

  In the present embodiment, a substantially circular outer shape of the drive side wall 35 suspended from the sheet supply side dome 33 and a substantial outline of the drive side dome 34 corresponding to the sheet winding side dome 34. Since the circular drive-side side wall portion 36 is configured in the same manner, the configuration of the drive-side side wall portion 36 of the sheet take-up side dome portion 34 will be described in detail below with reference to FIG. In addition, the numbers in parentheses are reference numerals of corresponding members in the sheet supply side dome portion 33.

  A hole-shaped bearing portion 36a (35a) that rotatably supports the drive shaft 26a of the drive shaft member 26A of the sheet winding bobbin 22 (21) is provided at the center of the wall surface of the drive side wall portion 36 (35). ) Is formed. The inner wall surface of the drive side wall portion 36 (35) extends in the radial direction of the hole-shaped bearing portion 36a (35a) and is formed on the outer wall surface of the flange 26b of the drive shaft member 26A. An engaging protrusion 36b (not shown) is provided so as to fit into the rectangular groove 26f.

  In the present embodiment, the support side wall portion 37 includes one outer wall portion 38 constituting the outer wall of the cartridge case 3, the inside of the sheet supply side dome portion 33 of the cartridge case 3, and the sheet winding side. In the dome part 34, it has the inner wall parts 39 and 40 suspended in parallel with the said outer wall part 38 at a fixed space | interval, respectively.

  In the present embodiment, the support side wall portion 37 is configured similarly on the sheet supply side dome portion 33 side and the sheet take-up side dome portion 34 side. The configuration of the support side wall portion 37 of the winding side dome portion 34 will be described in detail as a representative. In addition, the numbers in parentheses are reference numerals of corresponding members in the sheet supply side dome portion 33.

  The inner wall portion 40 (39) of the support side wall portion 37 has a hole-like bearing portion 40a (39a) that rotatably supports the support shaft 25a of the support shaft member 25A of the sheet winding bobbin 22 (21). ) Is formed.

  In the present embodiment, as shown in FIG. 7, the inner wall portion 40 (39) is an inclined surface having a chamfered inner end side portion, and the support shaft of the sheet winding bobbin 22 (21). 25a is configured to act as a guide wall for guiding the tip of the bearing 25a to the bearing 40a (39a).

  Next, an example of a method for detaching the ink sheet unit 2 from the cartridge case 3 will be described.

  When the unused ink sheet unit 2 is attached to the cartridge case 3, the cartridge case 3 is placed with its inside facing upward. Then, an ink sheet is placed in a semicircular arc-shaped space section (hereinafter referred to as a sheet supply bobbin storage section) surrounded by the drive side wall section 35, the support side wall section 37, and the sheet supply side dome section 33. The sheet supply bobbin 21 of the unit 2 is accommodated.

  First, the drive shaft 26a of the drive shaft member 26A of the sheet supply bobbin 21 is fitted into a hole-shaped bearing portion 35a formed in the drive side wall portion 35 so as to be slidable and rotatable. At this time, the rectangular groove 26f formed on the outer wall surface of the flange 26b is fitted with the engaging protrusion formed on the driving side wall portion 35.

  Subsequently, the spring member 27 disposed in the recess of the body drive side fitting portion 24b and interposed between the shaft body 23 and the drive shaft member 26A is pressed against an elastic restoring force, While reducing the axial length of the sheet supply bobbin 21, the tip end portion of the support shaft 25a of the support shaft member 25A is slid while being brought into contact with the guide wall surface formed on the inner wall portion 39, thereby supporting the support shaft 25a. Is guided to the bearing portion 39a, the length of the sheet supply bobbin 21 in the axial direction is extended using the elastic restoring force of the spring member 27, and the support shaft 25a is fitted into the bearing portion 39a. The shaft is rotatably supported (see FIG. 8). At this time, the flanges 25b and 26b of the drive shaft member 25A and the support shaft member 26A come into contact with the drive side wall portion 35 and the inner wall portion 39 of the support side wall portion 37, respectively. Accordingly, the sheet supply bobbin 21 is disposed in a state where an axial tension is applied by the elastic restoring force of the spring member 27. At this time, since the engaging protrusion and the rectangular groove 26f are fitted, it is possible to prevent the sheet supply bobbin 21 from idling when not attached to the printer, and to prevent the ink sheet from slackening. be able to.

  Further, a drive system of a printer (not shown) is connected to the drive shaft member 26A that is pivotally supported by the bearing portion 35a of the drive side wall portion 35. At the time of recording, by driving and rotating the drive system of the printer, the shaft-side engagement portion 26d of the drive shaft member 26A is formed on the body-side engagement formed on the body drive-side fitting portion 24b of the shaft body 23. The rotational driving force is transmitted to the joint portion 24d, and the main body side engaging portion 24d formed on the main body supporting side fitting portion 24a further applies the rotational driving force to the shaft side engaging portion 25d of the support shaft member 25A. By transmitting, the sheet supply bobbin 21 can be rotated integrally.

  When the sheet supply bobbin 21 is stored in the sheet supply bobbin storage portion in this way, an unused ink sheet pulled out from the sheet supply bobbin 21 is placed in the opening 32 of the case base 31 that opens to the conveyance path. The sheet winding bobbin 22 is stretched, and a semicircular arc-shaped space portion (hereinafter referred to as a sheet winding bobbin) surrounded by the driving side wall portion 36, the support side wall portion 37, and the sheet winding side dome portion 34. It is stored in the storage unit.) The storage method is the same as that when the sheet supply bobbin 21 is stored, and the description thereof is omitted.

  The ink sheet cartridge 1 in which the ink sheet unit 2 is housed in the cartridge case 3 in this manner is mounted at a predetermined position of the printer and used for recording. The ink sheet cartridge 1 of the present embodiment is a semi-open type in which the outer surface of the case base 31 is an upper surface when mounted on a printer, and the ink sheet unit 2 is stored and held below the case base 31. It has a structure. When the ink sheet cartridge of the present embodiment is mounted on a printer, the sheet supply bobbin 21 and the sheet take-up bobbin 22 are supported by a support shaft 25a and a drive shaft 26a, respectively, and the spring. Since it is held between the support side wall portion 37 and the drive side wall portions 35 and 36 by the tension applied from the member, even if it is a semi-open type cartridge, it does not fall off to the open side.

  When the used ink sheet unit 2 is collected from the cartridge case 3, first, the cartridge case 3 is placed with its inside facing upward. Then, the sheet winding bobbin 22 around which the used ink sheet is wound is collected from the sheet winding side bobbin storage section.

  At this time, the user grasps the support shaft member 25A and presses the inner wall portion 40 while pressing the support shaft member 25A to reduce the axial length of the sheet winding bobbin 22 against the pressing force of the spring member 44. The support shaft 25a of the support shaft member 25A is released from fitting to the bearing portion 40a, and then the fitting of the drive shaft of the drive shaft member 22c to the bearing portion 36a formed on the drive side wall portion 36 is released. .

  Similarly, the sheet supply bobbin 21 around which the used ink sheet is wound is collected from the sheet winding side bobbin storage section.

  As described above, the ink sheet cartridge according to this embodiment includes the driving side wall portion and the supporting side wall portion using the tension applied by the spring member included in the sheet feeding bobbin and the sheet winding bobbin. Since the ink sheet unit can be easily replaced, and the cartridge case does not need to be provided with a spring member, the structure of the cartridge case can be simplified.

  In addition, according to the ink sheet cartridge 1 of the present embodiment, which is a semi-open type, it is easy to replace the ink sheet unit 2 without requiring time and skill to disassemble the cartridge case 3, and the cartridge case Since 3 can be reused, the running cost is low.

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed.

  For example, in the bobbin of the first and second embodiments, the spring member does not necessarily have to be housed in the recess of the shaft body. For example, the spring member may be configured to be disposed between the distal end surface of the shaft body where the recess is formed and the flange of the shaft member. However, in view of safety, a problem of loss of the spring, and the like, it is preferable that the spring member is configured to be housed in the bobbin.

  Moreover, in the bobbin of 2nd Embodiment, it is also possible to set it as the structure which arrange | positions a spring member in the both ends of a shaft main body.

Sectional drawing of the principal part of 1st Embodiment of the bobbin of this invention II-II sectional view of FIG. Sectional drawing of the principal part of 2nd Embodiment of the bobbin of this invention The principal part top view of this embodiment of the ink sheet cartridge of this invention Explanatory perspective view showing the outer shape of the bobbin in the ink sheet cartridge of the present embodiment The perspective explanatory view showing the inner wall surface structure of the drive side wall portion in the ink sheet cartridge of the present embodiment Explanatory perspective view showing the structure of the support side wall in the ink sheet cartridge of the present embodiment FIG. 6 is a cross-sectional view of the main part showing the shaft support state of the support shaft member of the bobbin in the ink sheet cartridge of the present embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ink sheet cartridge 2 Ink sheet unit 3 Cartridge case 20 Bobbin 21 Sheet supply bobbin 22 Sheet winding bobbin 23 Shaft body 24 Body side fitting part 24a Body support side fitting part 24b Body drive side fitting part
24d Body side engaging portion 25 Support shaft portion 25A Support shaft member 25a Support shaft 25b Flange 25c Shaft side fitting portion 25d Shaft side engaging portion 26 Drive shaft portion 26A Drive shaft member 26a Drive shaft 26b Flange 26c Shaft side fitting portion 26d Shaft side engaging portion 26f Rectangular groove 27 Spring member 31 Case base 32 Opening portion 33 Sheet supply side dome portion 34 Sheet winding side dome portion 35 Bearing portion 35a Bearing portion 36 Drive side side wall portion 36a Bearing portion 36b Engaging protrusion 37 Support side wall portion 38 Outer wall portion 39, 40 Inner wall portion 39a, 40a Bearing portion

Claims (3)

A bobbin which is held in a state where an axial tension is applied between two wall surfaces and is rotatably supported;
A shaft member in which the other shaft portion is formed in the fitting portion of the outer cylindrical shaft body in which one shaft portion is integrally formed at one end portion and a fitting portion is formed at the other end portion is formed as a spring member. A bobbin wherein the axial length of the bobbin is fitted so that it can be expanded and contracted by sliding with a screw. The shaft members are respectively fitted to the fitting portions formed at both ends of the outer cylindrical shaft body, and are held in a state in which an axial tension is applied between the two wall surfaces, so that the shaft can rotate freely. A bobbin to be supported,
A bobbin characterized in that at least one shaft member is fitted with a spring member between the end of the shaft main body so that the axial length of the bobbin can be expanded and contracted by sliding. . 3. The bobbin according to claim 1 or 2, wherein an ink sheet is wound around the shaft main body in a roll shape so that the bobbin is rotatable between a drive side wall portion and a support side wall portion facing each other of the cartridge case. An ink sheet cartridge characterized by being supported.

Images