JP6808433B2 - Ink ribbon cassette and printing equipment - Google Patents

Description

The present invention relates to an ink ribbon cassette in which an ink ribbon is stored and a printing device to which an ink ribbon cassette can be attached and detached.

In a sublimation printer, a recording medium such as paper and an ink ribbon are pressed against each other by a thermal head and a platen roller, and the heating element on the thermal head is heated by energizing the thermal head to sublimate the dye applied to the ink ribbon. Printing is performed by transferring to paper.

The ink ribbon is configured so that a cylindrical supply bobbin and a take-up bobbin around which the ink ribbon is wound are housed in the ink ribbon cassette so that the ink ribbon can be easily attached to and detached from the printer body. The take bobbin is held rotatably.

When the ink ribbon cassette is attached to the printer body, the thermal head is positioned between the supply bobbin and the take-up bobbin, and the thermal head is pressed against the platen roller in a state where the ink ribbon and the paper are overlapped to print.

In Patent Document 1, when an ink ribbon cassette containing a supply bobbin and a take-up bobbin is loaded in the printer body, the supply bobbin and the take-up bobbin are moved in the direction opposite to the mounting direction of the ink ribbon cassette by a compression spring provided in the printer body. Be pushed. Then, a rotational friction force is generated by sliding the tip of the supply bobbin and the sliding surface provided on the ink ribbon cassette, and a constant torque can be applied to the supply bobbin. The torque generated in this supply bobbin acts as a brake so that the ink ribbon is not pulled out more than necessary when it is wound up by the take-up bobbin. The tension generated in the ink ribbon at this time is called back tension.

Japanese Unexamined Patent Publication No. 2012-187802

However, since the ink ribbon cassette described in Patent Document 1 applies a constant torque to the supply bobbin, the back tension changes according to the winding diameter of the ink ribbon in the supply bobbin. FIG. 13 In the case of a front page in which the number of printed sheets is small after the ink ribbon cassette has just started to be used, the back tension is small as shown in FIG. 13 because the winding diameter of the ink ribbon wound on the supply bobbin is large. On the other hand, as the number of printed sheets increases, the winding diameter of the ink ribbon wound around the supply bobbin decreases, so that the back tension increases.

Therefore, at the beginning of a book with a small number of printed sheets and a large winding diameter of the ink ribbon, the ink ribbon is not sufficiently stretched due to the small back tension, and wrinkles are likely to occur. Further, at the end of the winding where the number of printed sheets is large and the winding diameter of the ink ribbon is small, the back tension becomes larger than necessary, so that a problem that the ink ribbon cannot be wound by the winding bobbin tends to occur.

It is also possible to provide a back tension adjustment mechanism that adjusts the back tension according to the winding diameter of the ink ribbon wound on the supply bobbin, but in that case, the structure of the printer body becomes complicated and the number of parts is increased. And the cost will increase.

Therefore, the present invention has been made in view of the above problems, and provides an ink ribbon cassette capable of imparting appropriate back tension to an ink ribbon with a simple configuration without changing the configuration of the printer main body. Is.

In order to achieve the above object, the ink ribbon cassette of the present invention is used.
An ink ribbon cassette for accommodating an ink ribbon, a supply bobbon around which the ink ribbon is wound, and a take-up bobbon for winding the ink ribbon supplied from the supply bobbon, for accommodating the supply bobbon. The accommodating portion is provided with a plurality of sliding portions that can slide with the ink ribbon, and the sliding portions are provided with the ink ribbon when the diameter of the ink ribbon wound around the supply bobbin is reduced. The plurality of sliding portions are formed so as to reduce the number of sliding portions, and at least one of the plurality of sliding portions is the ink wound around the supply ribbon. It is characterized in that it is formed so as to slide with the ink ribbon regardless of the diameter of the ribbon and to bend the transport path of the ink ribbon.

According to the present invention, the sliding area between the sliding portion and the ink ribbon provided in the supply bobbin storage portion of the ink ribbon cassette changes according to the winding diameter of the ink ribbon wound around the supply bobbin. An appropriate back tension can be applied to the ink ribbon.

Perspective view showing the entire printer body and ink ribbon cassette Sectional view of ink ribbon cassette Bobbin perspective view Side view of the bush Sectional drawing explaining operation when loading an ink ribbon cassette into a printer body Cross-sectional view when the ink ribbon cassette is loaded in the printer body Enlarged cross section near the supply bobbin Graph explaining the value of back tension generated in the ink ribbon Enlarged sectional view of the vicinity of the supply bobbin in the second embodiment A graph for explaining the value of the back tension generated in the ink ribbon in the second embodiment. Enlarged sectional view of the vicinity of the supply bobbin in the third embodiment A graph for explaining the value of the back tension generated in the ink ribbon in the third embodiment. Graph explaining the value of back tension generated in the ink ribbon in the conventional prior example

[Example 1]
The first embodiment of the present invention will be described below with reference to FIGS. 1 to 8.

FIG. 1 is a perspective view showing the entire printer body and ink ribbon cassette according to the embodiment of the present invention.

Reference numeral 100 is a printer main body, 200 is an ink ribbon cassette, and 300 is a paper tray. On the side surface of the printer main body 100, there is an ink ribbon cassette insertion port 101 for mounting the ink ribbon cassette 200, and the ink ribbon cassette 200 is removable in the direction of arrow A. On the front surface of the printer body 100, there is a paper tray insertion slot 102 for mounting the paper tray 300, and the paper tray 300 can be attached and detached in the direction of arrow B.

103 is a display unit and 104 is an operation unit, which are arranged on the top surface of the printer main body 100. The display unit 103 is composed of display means such as an LCD, displays an image to be printed or image processing information on the display unit 103, selects an image by operating the operation unit 104, processes the image as appropriate, and prints the image. be able to.

FIG. 2 is a cross-sectional view of the ink ribbon cassette 200.

As shown in FIG. 2, the ink ribbon cassette 200 is composed of an upper case 201, a first lower case 202, and a second lower case 203. The upper case 201 and the first lower case 202 form a supply bobbin accommodating portion 207 for accommodating the supply bobbin 205 for supplying the ink ribbon 204. Further, the upper case 201 and the second lower case 203 form a take-up bobbin accommodating portion 208 for accommodating the take-up bobbin 206 for winding the ink ribbon 204. The supply bobbin storage unit 207 and the take-up bobbin storage unit 208 are connected by a connecting unit 209 and are arranged at a predetermined interval.

Reference numeral 221 is a first sliding surface, and 222 is a second sliding surface, which has a shape protruding from the inner wall of the upper case 201 on the supply bobbin storage portion 207 side so as to slide with the ink ribbon 204. Further, the second sliding surface 222 is provided in the supply side opening 214, and has a shape in which the radius of curvature is smaller than that of the first sliding surface 221 and the area sliding with the ink ribbon 204 is smaller. .. Further, the second sliding surface 222 also plays a role of curving the transport path of the ink ribbon 204 and guiding the ink ribbon 204 to the thermal head 124.

The supply bobbin 205 housed in the supply bobbin storage unit 207 is rotatably held, and the ink ribbon 204 is guided by the first sliding surface 221 and the second sliding surface 222 and pulled out from the supply side opening 214. The ink ribbon 204 drawn out from the supply bobbin storage unit 207 is guided by the take-up side support wall 215 and the guide shaft 210, the drawing direction is changed by approximately 90 °, and the ink ribbon 204 is rotatably held by the take-up bobbin storage unit 208. The take-up bobbin 206 is configured to be taken up. In this embodiment, the guide shaft 210 guides the ink ribbon 204 in order to reduce the sliding resistance when winding the ink ribbon 204. However, the guide shaft 210 sliding with the ink ribbon 204 is omitted, and the second lower case 203 The ink ribbon 204 may be guided by sliding with the ink ribbon 204.

FIG. 3 is a perspective view of the supply bobbin 205 (winding bobbin 206).

As shown in FIG. 3A, both the supply bobbin 205 and the take-up bobbin 206 are made of substantially cylindrical members made of resin having the same shape, and are provided integrally with the tubular base portion 205a (206a) provided in the center. It is composed of a small diameter portion 205b (206b) and a large diameter portion 205c (206c) provided at the other end.

A first flange portion 205d (206d) is provided at the boundary between the small diameter portion 205b (206b) and the base portion 205a (206a), and a second flange portion 205d (206d) is provided at the boundary between the large diameter portion 205c (206c) and the base portion 205a (206a). The flange portion 205e (206e) of the above is provided. As shown in the above, the ink ribbon 204 is wound between the first flange portion 205d (206d) and the second flange portion 205e (206e).

A convex portion 205f (206f) is provided on the inner wall surface of the large diameter portion 205c (206c) and engages with a bush provided in the printer main body 100 described later, and engages with the supply bobbin 205 and the take-up bobbin 206.

FIG. 4 is a side view of a bush provided in the printer main body 100.

Reference numeral 111 denotes a bush, which is fitted to a shaft 113 attached to the frame 110 of the printer main body 100 and is movably supported from the position shown in FIG. 4 (a) to the position shown in FIG. 4 (b). Reference numeral 112 denotes a compression spring, which always urges the bush 111 in the direction of arrow D in the drawing. Reference numeral 114 denotes an E-ring, which regulates the bush 111 from falling off the shaft 113, and the bush 111 is held at the position shown in FIG. 4A.

The bush 110 can rotatably hold the supply bobbin 205 and the take-up bobbin 206 by engaging with the large diameter portion 205c of the supply bobbin 205 and the large diameter portion 206c of the take-up bobbin 206. Further, the bush 110 has a plurality of protrusions 111a, and can engage with the convex portion 205f of the supply bobbin 205 and the convex portion 206f of the take-up bobbin 206 and rotate with the supply bobbin 205 and the take-up bobbin 206. .. Further, the take-up bobbin 206 can rotate the take-up bobbin 206 by rotationally driving the shaft 113 with a drive source (not shown), and the ink ribbon 204 can be taken up on the take-up bobbin 206.

FIG. 5 is a cross-sectional view illustrating an operation when the ink ribbon cassette 200 is loaded into the printer main body 100. FIG. 5A is a cross-sectional view of the printer body 100 being loaded with the ink ribbon cassette 200, and FIG. 5B is a cross-sectional view of the printer body 100 when the ink ribbon cassette 200 is fully loaded.

Reference numeral 201pa is a bobbin sliding surface, which is integrally provided on the upper case 201. As shown in FIG. 5A, when the printing of the ink ribbon cassette 200 is not completed in the printer body 100, the supply bobbin 205 is urged in the direction of arrow E in the figure by an elastic member (not shown), so that the supply bobbin 205 is supplied. The small diameter portion 205b of 205 is located at a position away from the bobbin sliding surface 201a provided on the upper case 201.

When the ink ribbon cassette 200 is pushed in the direction of arrow E in the drawing from the position shown in FIG. 5A, the bush 111 enters the large diameter portion 205c of the supply bobbin 205 and holds the supply bobbin 205 rotatably. At this time, since the bush 111 is urged by the compression spring 112 in the direction of arrow F in the figure, the supply bobbin 205 moves in the direction of arrow F in the figure, and the tip of the small diameter portion 205b is applied to the bobbin sliding surface 201a with a constant force. It is being pressed. When the ink ribbon 204 is pulled out and the supply bobbin 205 rotates in this state, a constant rotational frictional force is generated between the tip of the small diameter portion 205b and the bobbin sliding surface 201a. Since this rotational friction force is a force opposite to the force with which the ink ribbon 204 is pulled out, it becomes a back tension of the ink ribbon 204.

FIG. 6 is a cross-sectional view of the printer body 100 when the ink ribbon cassette 200 is loaded. FIG. 6A is a cross-sectional view in a print standby state, and FIG. 6B is a cross-sectional view in a printing operation.

120 is a thermal head, 121 is a thermal head support arm, 122 is a heat radiating plate, and 130 is a platen roller. The thermal head 120 is held by the thermal head support arm 121 and is rotatably supported around the rotation shaft 123, and rotates from the standby position shown in FIG. 6A to the printing position shown in FIG. 6B. It is possible, and a pressure contact force can be generated with the platen roller 130. The heat radiating plate 122 is attached to the thermal head 120, and is configured so that the heat generated by the thermal head 120 can be transferred to the heat radiating plate 122. The platen roller 130 is rotatably arranged on the printer main body 100, and is configured to rotate according to the transport of paper.

131 is a transport roller and 132 is a driven roller. The transfer roller 131 can be driven by a paper transfer motor (not shown) and rotationally driven. The driven roller 132 is a driven roller facing the transport roller 131, and is configured to rotate following the rotation of the transport roller 131.

Reference numeral 133 is a paper ejection drive roller, and reference numeral 134 is a paper ejection driven roller. The paper ejection drive roller 133 can be driven by a paper transport motor (not shown) and rotationally driven. The paper ejection driven roller 134 is a driven roller facing the paper ejection drive roller 133, and is configured to rotate following the rotation of the paper ejection drive roller 133.

When a printing instruction is given to the printer main body 100 as shown in FIG. 6B and the printing state is set, the paper 301 is fed to the printing start position shown in FIG. 6B by a paper feeding mechanism (not shown). Then, the thermal head 120 rotates from the standby position shown in FIG. 6A to the printing position shown in FIG. 6B, and the ink ribbon 204 and the paper 301 are pressed against each other by the thermal head 120 and the platen roller 130.

Then, the take-up bobbin 206 is rotationally driven in the direction of arrow G in the drawing by a bobbin rotation drive unit (not shown), and the ink ribbon 204 is taken up. At the same time, the transport roller 132 is rotationally driven by the paper transport and transport motor (not shown), and while the paper 301 is transported in the direction of arrow H in the drawing, the heating element of the thermal head 120 generates heat due to the printing signal given from the control device (not shown). , The dye on the ink ribbon 204 is thermally transferred to the paper 301 to print a desired image.

FIG. 7 is an enlarged cross-sectional view of the vicinity of the supply bobbin 205. FIG. 7A is a cross-sectional view at the beginning of using the ink ribbon cassette 200, FIG. 7B is a cross-sectional view during use of the ink ribbon cassette 200, and FIG. 7C is a cross-sectional view at the end of using the ink ribbon cassette 200. It is a cross-sectional view of.

As shown in FIG. 7A, the ink ribbon 204 wound around the supply bobbin 205 is pulled out from the supply bobbin accommodating portion 207 while sliding with the first sliding surface 221 and the second sliding surface 222.

At this time, the range in which the first sliding surface 221 and the ink ribbon 204 slide is a1.

Next, when the ink ribbon 204 is consumed and the winding diameter of the ink ribbon 204 wound around the supply bobbin 205 becomes smaller, the area range in which the first sliding surface 221 and the ink ribbon 204 slide as shown in FIG. 7 (b). Is smaller than a1 and becomes a2. Further, when the ink ribbon 204 is consumed and the winding diameter of the ink ribbon 204 wound around the supply bobbin 205 becomes smaller, the range in which the first sliding surface 221 and the ink ribbon 204 slide is a2 as shown in FIG. 7 (c). It becomes smaller and becomes a3.

That is, when the number of printed sheets of the ink ribbon cassette 200 increases, the ink ribbon 204 is consumed, and the winding diameter of the ink ribbon 204 wound around the supply bobbin 205 becomes smaller, the first sliding surface 221 and the ink ribbon 204 slide. The range becomes smaller. Therefore, the frictional force generated by the sliding of the first sliding surface and the ink ribbon 204 is reduced. Further, since the frictional force at this time is a force opposite to the force with which the ink ribbon 204 is pulled out, it becomes a back tension of the ink ribbon 204.

Further, since the ink ribbon 204 is supported by the second sliding surface 222 when it is pulled out from the supply side storage portion 207, the sliding range of the first sliding surface 221 and the ink ribbon 204 changes. However, the ink ribbon 204 of the supply side opening 214 always takes the same transport path. Therefore, the ink ribbon 204 drawn out from the supply side storage unit 207 is not likely to have a transport defect.

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

FIG. 8 is a graph for explaining the value of the back tension generated in the ink ribbon 204. Further, the values shown in FIG. 8 are simplified for the sake of clarity. The horizontal axis is the number of printed sheets N of the ink ribbon cassette 200, and the vertical axis is the tension T generated in the ink ribbon 204. Since the ink ribbon cassette 200 of the present embodiment contains an ink ribbon for printing 50 sheets, the maximum value of N is 50.

As described above, the rotational friction force generated between the tip of the small diameter portion 205b of the supply bobbin 205 and the bobbin sliding surface 201a is constant. Therefore, as the number of printed sheets N of the ink ribbon cassette 200 increases, the winding diameter of the ink ribbon 204 wound around the supply bobbin 205 decreases, and the tension T generated in the ink ribbon 204 increases. Therefore, the alternate long and short dash line shown in FIG. It becomes a curve.

On the other hand, the tension T generated in the ink ribbon 204 due to the frictional force between the first sliding surface 221 and the ink ribbon 204 is the ink wound on the supply bobbin 205 as the number of printed sheets N of the ink ribbon cassette 200 increases as described above. Since the winding diameter of the ribbon 204 becomes smaller and the tension T generated in the ink ribbon 204 decreases, the curve becomes the dotted line shown in FIG.

Therefore, the total back tension generated in the ink ribbon 204 is the tension obtained by adding the above two tensions, so that it becomes a solid line shown in FIG. 8 and can be controlled within a certain range regardless of the number of printed sheets N of the ink ribbon cassette 200. Therefore, good print quality can be realized.

[Example 2]
The second embodiment of the present invention will be described below with reference to FIGS. 9 to 10.

FIG. 9 is an enlarged cross-sectional view of the vicinity of the supply bobbin 205 in the second embodiment. FIG. 9A is a cross-sectional view at the beginning of using the ink ribbon cassette 200, and FIG. 9B is a cross-sectional view at the end of using the ink ribbon cassette 200.

Further, in order to simplify the explanation, the same reference numerals are given to the same parts as in the first embodiment.

As shown in FIG. 9A, the ink ribbon 204 wound around the supply bobbin 205 is pulled out while sliding at two locations, the first sliding surface 221 and the second sliding surface 222.

Next, when the ink ribbon 204 is consumed and the winding diameter of the ink ribbon 204 wound around the supply bobbin 205 becomes smaller, the ink ribbon 204 is separated from the first sliding surface 221 as shown in FIG. 9B, and the second It is pulled out while sliding only on the sliding surface 222 of the above.

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

FIG. 10 is a graph for explaining the value of the back tension generated in the ink ribbon 204 in the second embodiment. Further, the values shown in FIG. 10 are simplified for the sake of clarity. The horizontal axis is the number of printed sheets N of the ink ribbon cassette 200, and the vertical axis is the tension T generated in the ink ribbon 204.

Similar to the first embodiment, the rotational friction force generated between the tip of the small diameter portion 205b of the supply bobbin 205 and the bobbin sliding surface 201a is constant. Therefore, as the number of printed sheets N of the ink ribbon cassette 200 increases, the winding diameter of the ink ribbon 204 wound around the supply bobbin 205 decreases, and the tension T generated in the ink ribbon 204 increases. Therefore, the alternate long and short dash line shown in FIG. It becomes a curve.

On the other hand, the tension T generated between the first sliding surface 221 and the second sliding surface 222 and the ink ribbon 204 was wound around the supply bobbin 205 as the number of printed sheets N of the ink ribbon cassette 200 increased as described above. The winding diameter of the ink ribbon 204 becomes smaller and the ink ribbon 204 is separated from the first sliding surface 221. At that time, the tension T generated in the ink ribbon 204 sharply decreases, so that the tension T becomes a dotted curve shown in FIG.

Therefore, the back tension generated in the ink ribbon 204 is a tension obtained by adding the above two tensions, and thus is a solid line shown in FIG.

That is, when the number of printed sheets N increases, the back tension can be suppressed to the same level as in the conventional case, and even when the number of printed sheets N is small, the back tension can be increased. As a result, wrinkles that are likely to occur in the past when the number of printed sheets N is small can be suppressed, and the ink ribbon 204 can be wound up by the bobbin 206 even if the number of printed sheets N increases.

[Example 3]
The third embodiment of the present invention will be described below with reference to FIGS. 11 to 12.

FIG. 11 is an enlarged cross-sectional view of the vicinity of the supply bobbin 205 in the third embodiment. FIG. 11A is a cross-sectional view at the beginning of using the ink ribbon cassette 200, FIG. 11B is a cross-sectional view during the use of the ink ribbon cassette 200, and FIG. 11C is a cross-sectional view at the end of using the ink ribbon cassette 200. It is a cross-sectional view of.

Reference numeral 223 is a third sliding surface, which is located on the supply bobbin 205 side of the first sliding surface 221 and slides on the inner wall of the upper case 201 with the ink ribbon 204 in the same manner as the first sliding surface 221. It has a protruding shape. Further, in order to simplify the explanation, the same reference numerals are given to the same parts as in the first embodiment.

As shown in FIG. 11A, the ink ribbon 204 wound around the supply bobbin 205 slides at three locations: a third sliding surface 223, a first sliding surface 221 and a second sliding surface 222. While being pulled out.

Next, when the ink ribbon 204 is consumed and the winding diameter of the ink ribbon 204 wound around the supply bobbin 205 becomes smaller, the ink ribbon 204 is separated from the third sliding surface 223 as shown in FIG. 11B, and the first It is pulled out while sliding with the sliding surface 221 and the second sliding surface 222.

Further, when the ink ribbon 204 is consumed and the winding diameter of the ink ribbon 204 wound around the supply bobbin 205 becomes smaller, the ink ribbon 204 is separated from the third sliding surface 223 and the first sliding surface 221 as shown in FIG. 11 (c). It is in position and is pulled out while sliding only on the second sliding surface 222.

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

FIG. 12 is a graph for explaining the value of the back tension generated in the ink ribbon 204 in the third embodiment. In addition, FIG. 12 is simplified for the sake of clarity. The horizontal axis is the number of printed sheets N of the ink ribbon cassette 200, and the vertical axis is the tension T generated in the ink ribbon 204.

Similar to the first embodiment, the rotational friction force generated between the tip of the small diameter portion 205b of the supply bobbin 205 and the bobbin sliding surface 201a is constant. Therefore, as the number of printed sheets N of the ink ribbon cassette 200 increases, the winding diameter of the ink ribbon 204 wound around the supply bobbin 205 decreases, and the tension T generated in the ink ribbon 204 increases, so that the alternate long and short dash line shown in FIG. 11 It becomes a curve.

On the other hand, the tension T generated between the first sliding surface 221 and the second sliding surface 222, the third sliding surface 223 and the ink ribbon 204 increases the number of printed sheets N of the ink ribbon cassette 200 as described above. Then, the winding diameter of the ink ribbon 204 wound around the supply bobbin 205 becomes smaller, and the ink ribbon 204 is separated from the third sliding surface 223. At that time, the tension T generated in the ink ribbon 204 sharply decreases.

Further, as the number of printed sheets N of the ink ribbon cassette 200 increases, the winding diameter of the ink ribbon 204 wound around the supply bobbin 205 becomes smaller, and the ink ribbon cassette 200 is separated from the first sliding surface 221. At that time, the tension T generated in the ink ribbon 204 sharply decreases and becomes a dotted line curve shown in FIG.

Therefore, since the back tension generated in the ink ribbon 204 is the tension obtained by adding the above two tensions, it becomes a solid line shown in FIG. 12, and the back tension generated in the ink ribbon 204 can be controlled stepwise. That is, an appropriate back tension can be applied to the ink ribbon 204 regardless of the number of printed sheets N of the ink ribbon cassette 200.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and modifications can be made within the scope of the gist thereof.

Claims (4)

An ink ribbon cassette that houses an ink ribbon, a supply bobbin around which the ink ribbon is wound, and a take-up bobbin that winds up the ink ribbon supplied from the supply bobbin.
The storage portion for storing the supply bobbin is provided with a plurality of sliding portions slidable with the ink ribbon.
In the sliding portion, the plurality of sliding portions are formed so that the number of sliding portions sliding with the ink ribbon is reduced when the diameter of the ink ribbon wound around the supply bobbin is reduced. Is formed and
At least one of the plurality of sliding portions slides with the ink ribbon regardless of the diameter of the ink ribbon wound around the supply bobbin, and the transport path of the ink ribbon is curved. An ink ribbon cassette characterized by being formed in . The sliding portion is characterized in that the sliding area between the sliding portion and the ink ribbon decreases as the diameter of the ink ribbon wound around the supply bobbin decreases. The ink ribbon cassette according to claim 1. Wherein the plurality of sliding surface of the sliding portion is a curved surface, the ink ribbon cassette according to claim 1, towards the sliding part close to the winding bobbin, characterized in that a large curvature. A printing device to which the ink ribbon cassette according to any one of claims 1 to 3 can be attached and detached.

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