JP2006198982A - Ribbon cassette - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ribbon cassette which can easily attain miniaturization. <P>SOLUTION: At least one of a pair of core supporting parts 4 set at one pair of side plates 2 for supporting a ribbon core C with an ink ribbon R wound is constituted of a bobbin 6 to which one end in the axial direction of the ribbon core C is attached, and a bobbin shaft 7 with the bobbin 6 mounted at one end. At the same time, the bobbin shaft 7 is supported so as to be freely rotatable and movable along the thickness direction of the side plate 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a ribbon cassette, and more particularly to a ribbon cassette in which a ribbon core around which an ink ribbon is wound is detachable.

  Conventionally, a line thermal head having a length that can be opposed to a longitudinal or lateral recording range of a recording medium via a wide ink ribbon such as an ink film or an ink sheet and the recording medium is brought into contact with the platen. A plurality of heating elements corresponding to the recording width arranged in the longitudinal direction of the platen of the line thermal head are selectively driven based on the recording information to generate heat while conveying the ink ribbon and the recording medium in the contact state. Thus, there is known a printer that performs recording by transferring ink of an ink ribbon to a recording medium.

  Both ends of such an ink ribbon in the longitudinal direction are fixed to the outer peripheral surface of a pair of ribbon cores composed of a supply ribbon core and a take-up ribbon core formed in a substantially cylindrical shape, and are wound from both ends. The pair of ribbon cores around which the ink ribbon is wound are detachably attached to the ribbon cassette. When replacing the ink ribbon, the pair of ribbon cores around which the used ink ribbon for use is wound A pair of ribbon cores, which are removed from the ribbon cassette and wound with a new ink ribbon, can be mounted on the ribbon cassette.

  In this type of ribbon cassette, in order to detachably mount a pair of cylindrical ribbon cores around which an ink ribbon is wound, the ribbon cassettes are arranged in parallel to each other with an interval longer than the axial length of the ribbon core. A pair of side plates and a pair of core support portions that are disposed so as to face each other and are attached to the end portions of the ribbon core in the axial direction are proposed (for example, patents). Reference 1).

  However, in the conventional ribbon cassette, when replacing the ink ribbon, it is necessary to remove the core support portion disposed on at least one of the side plates from the side plate. It was.

  In order to deal with such problems, an ink ribbon can be replaced without removing the core support from the side plate by disposing a bobbin that can move along the thickness direction of the side plate on one core support. There is a ribbon cassette with improved operability when replacing an ink ribbon that can be easily performed.

  6 and 7 show an example of a conventional ribbon cassette provided with a bobbin movable along the thickness direction of the side plate. FIG. 6 is a perspective view and FIG. 7 is a front view.

  First, for convenience of explanation, an ink ribbon for exchanging a ribbon cassette will be described first with reference to FIG.

  As shown in FIG. 7, the ink ribbon R is wound around the outer peripheral surfaces of a pair of ribbon cores C from both ends. The pair of ribbon cores C are formed in a substantially cylindrical shape, and when mounted on the ribbon cassette 101, one of them is a take-up ribbon core that winds up the portion of the ink ribbon R that has been used for recording, and the other is , A delivery ribbon core for delivering the ink ribbon R.

  In the vicinity of both end portions in the axial direction of the ribbon core C, flanges C1 having a diameter larger than the outer diameter of the ribbon core C are respectively provided. A small-diameter portion C2 having a smaller diameter than the outer diameter of the ribbon core C is formed at each end on the axially outer side from both flanges C1. Further, a plurality of engaging projections C4 each having a predetermined length are formed in both ends of the inner hole C3 of the ribbon core C in a spline shape at intervals in the circumferential direction (see FIGS. 6 and 12). Some are shown. In the ribbon core C, the distance between the left end of the ribbon core C in FIG. 7 and the outer end surface of the flange C1 adjacent to the left end is the insertion amount CA of the ribbon core C inserted into the left core support portion 104L described later. The distance between the outer end surface of the left end flange C1 and the right end of the ribbon core C is the positioning width CB of the ribbon core C when the ink ribbon R is mounted on the ribbon cassette 101. The ribbon core C is formed symmetrically along the axial direction with the central portion in the axial direction as the center.

  Next, the ribbon cassette will be described with reference to FIGS.

  As shown in FIGS. 6 and 7, the conventional ribbon cassette 101 has a pair of left and right side plates 102 including a left side plate 102L and a right side plate 102R. These side plates 102 are arranged in parallel with each other at a predetermined interval by a plurality of connecting shafts 103. In addition, a pair of left and right core support portions 104 including a left core support portion 104L and a right core support portion 104R to which the respective axial ends of the pair of ribbon cores C are attached are opposed to each side plate 102. It is arranged. Further, two sets of core support portions 104 are arranged on each side plate 102 in the vertical direction so as to correspond to the pair of ribbon cores C around which the ink ribbon R is wound. Further, both ends of a plurality of guide rollers (not shown) for guiding the ink ribbon R along a predetermined ribbon path are rotatably supported by the pair of side plates 102.

  The left core support portion 104L is for rotatably supporting the left end of the ribbon core C, specifically, the small diameter portion C2 formed at the left end. The left core support portion 104L includes a right plate 102R. An annular convex portion 105 that protrudes toward the surface is formed. And the inner hole 105a (FIG. 6) of this cyclic | annular convex part 105 is formed so that the left side board 102L may be penetrated in the thickness direction. Further, the size of the inner hole 105a is slightly larger than the size of the outer diameter of the small diameter part C2 of the ribbon core C, and this inner hole 105a is a support hole that rotatably supports the small diameter part C2 of the ribbon core C. ing. Further, the outer end surface of the flange C1 on the left end side of the ribbon core C can be brought into contact with the tip of the annular convex portion 105 when the ribbon core C is inserted with the small diameter portion C2 of the ribbon core C inserted into the support hole. By positioning the outer end surface of the flange C1 on the left end side of the ribbon core C in contact with the tip of the convex portion 105, the left end of the ribbon core C mounted on the ribbon cassette 101 is positioned.

  The right core support portion 104R is for rotatably supporting the right end of the ribbon core C. As shown in FIG. 7, the right core support portion 104R includes a bobbin 106, a bobbin shaft 107, and an urging force. And a spring 108.

  The bobbin 106 has a body portion 106a to which the inner hole C3 of the ribbon core C is mounted, and an appropriate number of engaging claws 109 are formed in a spline shape on the outer peripheral surface of the body portion 106a. And engaged with an engaging protrusion C4 formed in the inner hole C3 of the ribbon core C. Further, the distal end side shown to the left of the body portion 106a is a guide portion 106b whose outer diameter gradually decreases toward the distal end for facilitating insertion of the inner hole C3 at the right end of the ribbon core C. Further, a core receiving flange 110 protruding toward the radially outer side is integrally formed at the base end portion shown on the right side of the body portion 106a, and the tip of the core receiving flange 110 shown on the left side in FIG. The end face on the side is the right end side of the ribbon core C by the spring force of the urging spring 108 attached to the outer periphery of the bobbin shaft 107 when the ribbon core C is inserted with the small diameter part C2 of the ribbon core C inserted into the body part 106a of the bobbin 106 It is possible to contact the outer end surface of the flange C1. Then, the right end of the ribbon core C is brought into contact with the end face of the core receiving flange 110 on the front end side shown on the left in FIG. 7 by the spring force of the urging spring 108, thereby positioning the right end of the ribbon core C mounted on the ribbon cassette 101. To be done.

  The bobbin shaft 107 is rotatably supported by a bearing body 111 having a base end attached to the right side plate 102R. The axial length of the bearing body 111 is formed longer than the thickness of the right side plate 102R, and both axial ends of the bearing body 111 are arranged so as to protrude from the right side plate 102R. 7 is disposed so as to protrude toward the left side plate 102L, and the bobbin 106 is rotatable and axially disposed on the bobbin shaft 107. It is supported so as to be movable along the thickness direction of the right side plate 102R. Further, a retaining ring 112 is attached to the tip of the bobbin shaft 107 to prevent the bobbin 106 from falling off the bobbin shaft 107.

  The biasing spring 108 is formed by a compression coil spring. The urging spring 108 is mounted on the outer periphery of the bobbin shaft 107 inside the right side plate 102R. The spring force of the urging spring 108 normally causes the bobbin 106 to be connected to the tip end side of the bobbin shaft 107, that is, the right side. It is biased in the direction toward the inner side of the plate 102R (the direction toward the left side plate 102L). The movement of the bobbin 106 toward the distal end side of the bobbin shaft 107 is regulated by a retaining ring 112 attached to the distal end side of the bobbin shaft 107 as shown in the lower part of FIG. The movement of 107 toward the base end side is regulated by the close contact height of the urging spring 108 as in the bobbin 106 shown in the upper part of FIG.

  Accordingly, the distance between the end surface on the front end side of the core receiving flange 110 of the bobbin 106 shown in the upper part of FIG. 7 and the end surface on the front end side of the core receiving flange 110 of the bobbin 106 shown in the lower part of FIG. M.

  According to the ribbon cassette 101 having such a configuration, the ink ribbon R is mounted, for example, by the bobbin 106 of the right core support portion 104R of the upper core support portion 104 of the two sets of core support portions 104 in the vertical direction. It moves toward the inner surface of the right side plate 102R against the spring force of the biasing spring 108. Then, the end portion of the inner hole C3 at the right end of one ribbon core C is inserted obliquely into the guide portion 106b of the bobbin 106 to obtain a ribbon core insertion start state. FIG. 8 shows a ribbon core insertion start state in which the end portion of the inner hole C3 at one end of the ribbon core C is inserted into the guide portion 106b of the bobbin 106 obliquely.

  Next, the inner end C3 of the right end of the ribbon core C is inserted into the guide portion 106b of the bobbin 106 while rotating so that the left end of the ribbon core C approaches the annular convex portion 105 with the right end portion of the ribbon core C as a fulcrum. FIG. 9 shows a state in the middle of insertion of one end of the ribbon core C in which the right end of the ribbon core C is inserted to the middle of the guide portion 106b.

  Next, when the left end of the ribbon core C is made to face the annular convex portion 105, the inner hole C3 at the right end of the ribbon core C is inserted into the guide portion 106b of the bobbin 106, and the right end of the ribbon core C is placed on the end face of the core receiving flange 110 The outer end face of the side flange C1 comes into contact, and the bobbin insertion is completed. FIG. 10 shows a bobbin insertion completion state of the ribbon core C in which the right end of the ribbon core C is inserted into the bobbin 106.

  Next, the ribbon core C is moved toward the inner surface of the left side plate 102 </ b> L, and the small diameter portion C <b> 2 at the left end of the ribbon core C is inserted into the inner hole 105 a of the annular convex portion 105. At this time, the ribbon core C moves to the left together with the bobbin 106 by the urging force of the urging spring 108. Then, when the small-diameter portion C2 at the left end of the ribbon core C is inserted into the inner hole 105a of the annular convex portion 105, when the outer end surface of the flange C1 on the left end side of the ribbon core C comes into contact with the tip of the annular convex portion 105, Positioning of the left end is performed, and the mounting of the ribbon core C to the ribbon cassette 101 is completed. FIG. 11 shows a state where the ribbon core C is completely attached.

  Next, when the other ribbon core C is attached to the lower core support portion 104 in the same manner as described above, the attachment of the ink ribbon R to the ribbon cassette 101 is completed. FIG. 12 shows a state where the ink ribbon R is mounted on the ribbon cassette 101.

  Further, since the removal of the ink ribbon R from the ribbon cassette 101 is performed in the reverse procedure to the attachment of the ink ribbon R to the ribbon cassette 101, detailed description thereof is omitted.

Japanese Patent Laid-Open No. 2003-080783

  Incidentally, in recent years, there is a demand for higher performance of various apparatuses, and as one of the higher performance of various apparatuses, the ribbon cassette 101 is also required to be downsized.

  However, in the conventional ribbon cassette 101, since only the bobbin 106 is movable, there is a problem that the ribbon cassette 101 needs to be widened with a margin.

  When the width of the ribbon cassette 101 is large, it is necessary to increase the width of the printer in which the ribbon cassette 101 is mounted.

  The present invention has been made in view of these points, and an object thereof is to provide a ribbon cassette that can be easily reduced in size.

  In order to achieve the above-described object, the ribbon cassette according to the present invention is characterized by the axial length of each ribbon core in order to detachably mount a pair of cylindrical ribbon cores around which the ink ribbon is wound. A pair of core supports arranged in parallel to each other at a long interval, and a pair of core supports that are arranged so as to be opposed to each side plate and are respectively attached to axial ends of the ribbon cores. A ribbon cassette having two sets of portions, wherein at least one of the pair of core support portions has a bobbin to which one end portion in the axial direction of the ribbon core is attached, and the bobbin is attached to one end portion. The bobbin shaft is supported by the side plate so as to be rotatable and movable along the thickness direction of the side plate with the bobbin disposed inside the side plate. To the point .

  In the ribbon cassette according to the present invention, it is preferable that a biasing spring for biasing the bobbin shaft toward the inside of the side plate is provided.

  According to the ribbon cassette according to the present invention, since the bobbin shaft moves integrally with the bobbin, there is an extremely excellent effect that the interval between the pair of side plates can be shortened. As a result, the ribbon cassette can be miniaturized easily and the like.

  The present invention will be described below with reference to embodiments shown in the drawings.

  FIG. 1 is a front view showing a main part of an embodiment of a ribbon cassette according to the present invention. Note that the same or corresponding components as those of the conventional one described above are denoted by the same reference numerals in the drawings, and detailed description thereof is omitted.

  The ribbon cassette of this embodiment illustrates the case of using the above-described conventional ink ribbon.

  As shown in FIG. 1, the ribbon cassette 1 of this embodiment has a pair of left and right side plates 2 including a left side plate 2L and a right side plate 2R. These side plates 2 are arranged in parallel with each other at a predetermined interval by a plurality of connecting shafts 3. Further, a pair of left and right core support portions 4 including a left core support portion 4L and a right core support portion 4R to which the respective axial ends of the pair of ribbon cores C are attached are opposed to each side plate 2. It is arranged. Further, each side plate 2 is provided with two sets of core support portions 4 in the vertical direction so as to correspond to the pair of ribbon cores C around which the ink ribbon R is wound. In addition, both ends of a plurality of guide rollers (not shown) for guiding the ink ribbon R along a predetermined ribbon path are rotatably supported by the pair of side plates 2.

  The left core support portion 4L is for rotatably supporting the left end of the ribbon core C, specifically, the small diameter portion C2 formed at the left end, and is formed in the same manner as the conventional left core support portion 104L. Yes.

  That is, the left core support portion 4L is formed with an annular convex portion 5 that protrudes toward the right side plate 2R. And the inner hole 5a (refer FIG. 2) of this cyclic | annular convex part 5 is formed so that the left side board 2L may be penetrated in thickness direction. The size of the inner hole 5a is slightly larger than the size of the outer diameter of the small-diameter portion C2 of the ribbon core C. The inner hole 5a is a support hole that rotatably supports the small-diameter portion C2 of the ribbon core C. ing. Further, the outer end surface of the flange C1 on the left end side of the ribbon core C can be brought into contact with the tip of the annular convex portion 5 in the mounted state of the ribbon core C in which the small diameter portion C2 of the ribbon core C is inserted into the support hole. By positioning the outer end surface of the flange C1 on the left end side of the ribbon core C in contact with the tip of the convex portion 5, the left end of the ribbon core C mounted on the ribbon cassette 1 is positioned.

  The right core support portion 4R is for rotatably supporting the right end of the ribbon core C. The right core support portion 4R includes a bobbin 6, a bobbin shaft 7, and a biasing spring 8. Yes.

  The bobbin 6 has a body portion 6a to which the inner hole C3 of the ribbon core C is mounted. An appropriate number of engaging claws 9 are formed in a spline shape on the outer peripheral surface of the body portion 6a, and engage with an engaging protrusion C4 (see FIG. 2) formed in the inner hole C3 of the ribbon core C. It has come to be. Further, the distal end side shown to the left of the body portion 6a is a guide portion 6b whose outer diameter gradually decreases toward the distal end for facilitating insertion of the inner hole C3 at the right end of the ribbon core C. Further, a core receiving flange 10 projecting radially outward is integrally formed at a base end portion shown on the right side of the body portion 6a, and a distal end of the core receiving flange 10 shown on the left side in FIG. The end face on the side is the right end side of the ribbon core C by the spring force of the urging spring 8 attached to the outer periphery of the bobbin shaft 7 when the ribbon core C is inserted with the small diameter part C2 of the ribbon core C inserted into the body part 6a of the bobbin 6. It is possible to contact the outer end surface of the flange C1. Then, the right end of the ribbon core C attached to the ribbon cassette 1 is positioned by bringing the right end of the ribbon core C into contact with the end face on the front end side of the core receiving flange 10 by the spring force of the biasing spring 8. .

  The bobbin shaft 7 is supported by a substantially cylindrical bearing body 11 having a base end attached to the right side plate 2R so as to be rotatable and movable in the thickness direction of the right side plate 2R. The axial length of the bearing body 11 is formed to be longer than the thickness of the right side plate 2R, and both ends of the bearing body 11 in the axial direction are disposed so as to protrude from the right side plate 2R. Further, the tip end portion of the bobbin shaft 7 shown on the left side in FIG. 1 is disposed so as to protrude toward the left side plate 2L, and the bobbin 6 is supported on the tip end portion. A tip retaining ring 12 for preventing the bobbin 6 from falling off the bobbin shaft 7 is attached to the tip of the bobbin shaft 7.

  The biasing spring 8 is formed by a compression coil spring. The urging spring 8 is attached to the outer periphery of the bobbin shaft 7 inside the right side plate 2R, and the tip of the bobbin shaft 7 and the bobbin 6 are normally integrated by the spring force of the urging spring 8. It is biased to the side, that is, the direction toward the inside of the right side plate 2R (the direction toward the left side plate 2L). The movement of the bobbin shaft 7 toward the front end side is restricted by a rear end retaining ring 13 attached to the base end side of the bobbin shaft 7 disposed outside the right side plate 2R. Further, the movement of the bobbin 6 toward the distal end side of the bobbin shaft 7 is restricted by the distal end retaining ring 12 attached to the distal end portion of the bobbin shaft 7. Further, the movement of the bobbin 6 toward the base end side of the bobbin shaft 7 is regulated by the contact height of the urging spring 8.

  Accordingly, the distance between the left end of the rear end retaining ring 13 on the base end side of the bobbin shaft 7 shown in FIG. 1 and the right end surface of the bearing body 11 is the amount of movement N of the bobbin shaft 7. The moving amount N of the bobbin shaft 7 is formed to be the same as the moving amount M of the bobbin 6 that moves integrally with the bobbin shaft 7.

  Note that the left core support portion 4L may have the same configuration as the right core support portion 4R.

  Since other configurations are the same as those of the conventional ribbon cassette 101, detailed description thereof is omitted.

  Next, the operation of the present embodiment having the above-described configuration will be described.

  According to the ribbon cassette 1 of the present embodiment, the ink ribbon R is attached, for example, by attaching the bobbin 6 of the right core support portion 4R of the upper core support portion 4 of the two core support portions 4 in the vertical direction. It moves toward the inner surface of the right side plate 2 </ b> R against the spring force of the force spring 8. At this time, the bobbin shaft 7 moves to the right side together with the bobbin 6. Then, the end portion of the inner hole C3 at the right end of one ribbon core C is obliquely inserted into the guide portion 6b of the bobbin 6, and a ribbon core insertion start state is set. FIG. 2 shows a ribbon core insertion start state in which the end portion of the inner hole C3 at one end of the ribbon core C is obliquely inserted into the guide portion 6b of the bobbin 6.

  Next, the inner hole C3 at the right end of the ribbon core C is inserted into the guide portion 6b of the bobbin 6 while rotating so that the left end of the ribbon core C approaches the annular convex portion 5 with the right end portion of the ribbon core C as a fulcrum. FIG. 3 shows a state in the middle of insertion of one end of the ribbon core C in which the right end of the ribbon core C is inserted partway through the guide portion 6b.

  Next, when the left end of the ribbon core C is made to face the annular convex portion 5, the inner hole C3 at the right end of the ribbon core C is inserted into the guide portion 6 b of the bobbin 6, The outer end face of the side flange C1 comes into contact, and the bobbin insertion is completed. FIG. 4 shows the bobbin insertion completion state of the ribbon core C in which the right end of the ribbon core C is inserted into the bobbin 6.

  Next, the ribbon core C is moved toward the inner surface of the left side plate 2 </ b> L, and the small diameter portion C <b> 2 at the left end of the ribbon core C is inserted into the inner hole 5 a of the annular convex portion 5. At this time, the ribbon core C moves to the left together with the bobbin 6 and the bobbin shaft 7 by the urging force of the urging spring 10. When the small diameter portion C2 at the left end of the ribbon core C is inserted into the inner hole 5a of the annular convex portion 5, the outer end surface of the flange C1 on the left end side of the ribbon core C comes into contact with the tip of the annular convex portion 5. Positioning of the left end is performed, and the mounting of the ribbon core C to the ribbon cassette 101 is completed. FIG. 5 shows a state where the ribbon core C is completely attached.

  Next, when the other ribbon core C is mounted on the lower core support portion 4 in the same manner as described above, the mounting of the ink ribbon R to the ribbon cassette 1 is completed, and the ink ribbon R is mounted.

  Further, since the removal of the ink ribbon R from the ribbon cassette 1 is performed in the reverse procedure to the mounting of the ink ribbon R to the ribbon cassette 1, detailed description thereof is omitted.

  Thus, according to the ribbon cassette 1 of the present embodiment, when replacing the ink ribbon R, the bobbin shaft 7 can be moved along the thickness direction of the right side plate 2R (the axial direction of the bobbin shaft 7) together with the bobbin 6. Since it is formed, the distance between the pair of side plates 2, that is, the width of the ribbon cassette 1 shown in the left-right direction in FIG. 1 is shortened compared to the configuration in which only the bobbin 106 of the conventional ribbon cassette 101 is movable. be able to.

  Therefore, according to the ribbon cassette 1 of this embodiment, size reduction can be achieved easily.

  Moreover, according to the ribbon cassette 1 of this embodiment, the length of the connection shaft 3 can be shortened by shortening the distance between the pair of side plates 2. As a result, the weight can be reduced by reducing the length of the connecting shaft, so that the weight can be reduced.

  Such a reduction in size and weight of the ribbon cassette 1 greatly contributes to a reduction in size and weight of the printer.

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

The front view which shows the principal part of embodiment of the ribbon cassette which concerns on this invention Explanatory drawing which shows the principal part of the ribbon core insertion start state of ribbon core mounting | wearing operation | movement in embodiment of the ribbon cassette which concerns on this invention. Explanatory drawing which shows the principal part of the state in the middle of insertion of the end of the ribbon core following FIG. 2 of the ribbon core mounting | wearing operation | movement in embodiment of the ribbon cassette which concerns on this invention. Explanatory drawing which shows the principal part of the bobbin insertion completion state of the ribbon core which inserted one end of the ribbon core into the bobbin following FIG. 3 of the ribbon core mounting operation in the embodiment of the ribbon cassette according to the present invention. Explanatory drawing which shows the principal part of the ribbon core mounting completion state following FIG. 4 of the ribbon core mounting operation in the embodiment of the ribbon cassette according to the present invention. A perspective view showing an example of a conventional ribbon cassette Front view of the main part of the ribbon cassette of FIG. Explanatory drawing which shows the principal part of the ribbon core insertion start state of the ribbon core mounting operation of the conventional ribbon cassette Explanatory drawing which shows the principal part of the state in the middle of insertion of the end of the ribbon core following FIG. 8 of the ribbon core mounting operation | movement of the conventional ribbon cassette. Explanatory drawing which shows the principal part of the bobbin insertion completion state of the ribbon core which inserted the end of the ribbon core into the bobbin following FIG. 9 of the ribbon core mounting operation | movement of the conventional ribbon cassette. Explanatory drawing which shows the principal part of the ribbon core mounting completion state following FIG. 10 of the ribbon core mounting operation of the conventional ribbon cassette. The perspective view which shows the principal part of the mounting state of the ink ribbon of the conventional ribbon cassette

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ribbon cassette 2 Side plate 2L Left side plate 2R Right side plate 3 Connection shaft 4 Core support part 4L Left core support part 4R Right core support part 5 Annular convex part 6 Bobbin 7 Bobbin shaft 8 Energizing spring 10 Core receiving flange 11 Bearing body 12 Tip Retaining ring 13 Retaining ring for rear end M (Bobbin) travel N (Bobbin shaft) travel C Ribbon core CA Insertion amount CB Positioning width C1 Flange C2 Small diameter part C3 Inner hole R Ink ribbon

Claims (2)

In order to detachably mount a pair of cylindrical ribbon cores around which an ink ribbon is wound, a pair of side plates disposed in parallel to each other with an interval longer than the axial length of each ribbon core; A ribbon cassette having two pairs of core support portions disposed so as to be opposed to each side plate and to which each of the end portions in the axial direction of the respective ribbon cores is mounted;
At least one of the pair of core support portions is
A bobbin to which one end portion in the axial direction of the ribbon core is attached; and a bobbin shaft to which the bobbin is attached to one end portion;
The ribbon cassette, wherein the bobbin shaft is supported by the side plate so as to be rotatable and movable in the thickness direction of the side plate with the bobbin disposed inside the side plate.   The ribbon cassette according to claim 1, further comprising an urging spring for urging the bobbin shaft toward the inner side of the side plate.

Images