JP2008119863A - Ink sheet feeding mechanism and printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink sheet feeding mechanism capable of easily removing and attaching an ink ribbon and acquiring a good quality of printing. <P>SOLUTION: A bobbin 1, a joint member 2 which is fitted to the bobbin 1 and transmits rotation by being integrated with the bobbin 1, a holder 3 holding the tip part of the energized bobbin 1 and rotating by being integrated with the joint member 2, a torque limiter 5 fitting a projecting part of the other end side of the holder 3 into its recessed part and connected with the holder 3 to generate a torque, and a shaft 9 whose central shaft becomes a rotational central shaft of the members 2, 3 and 5 are installed coaxially. In addition, a structure in which the shaft 9 is not fixed on a frame 13 is employed. Tapered shapes which becomes guides of the bobbin 1 when the bobbin 1 is attached and removed are provided on the joint member 2 and the holder 3. The joint member 2 is fitted to the bobbin 1 synchronously with opening and closing of a door, or operation for releasing is performed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an ink sheet supply mechanism used in a printer that records an image by transferring ink from an ink sheet to recording paper.

  In a printer using an ink sheet, an ink sheet supplied from a supply bobbin (hereinafter also simply referred to as a bobbin) around which the ink sheet is wound is transferred to recording paper by a thermal head, and then the ink sheet is wound up. It is wound on a bobbin. At this time, if a change in tension occurs in the ink sheet, the printing quality is deteriorated. Therefore, the ink sheet is supplied and wound with a constant tension.

  As a means for this, a gear is provided on the supply or take-up bobbin, a torque limiter is arranged coaxially with another gear meshing with the gear, and the supply or take-up bobbin is fixed to the supply or take-up bobbin via the gear. A constant tension is applied to the ink sheet by applying torque (conventional example 1).

  Alternatively, as shown in Patent Document 1, for example, torque generating means using a friction member such as felt is arranged coaxially with the ink bobbin, and a constant torque is given to the bobbin (Conventional Example 2).

JP 2002-234241 A Japanese Patent Laid-Open No. 5-126171

  In Conventional Example 1 using gears, minute vibrations due to the meshing of gear teeth and one tooth are a source of variation in tension on the ink sheet, and the variation in tension may cause a decrease in print quality. It was.

  Further, in the conventional example 2 in which no gear is used, the decrease in print quality is not a problem in that the tension fluctuation does not occur as in the conventional example 1. However, when the ink sheet is replaced, the user does not end the ink bobbin. The ink bobbin holding member must be securely inserted into the ink bobbin holding member, and the ink bobbin is not easily attached and detached.

  The present invention has been made in order to solve the above-described problems. The ink bobbin can be easily attached and detached when replacing the ink sheet, and the tension of the minute ink sheet due to the presence of the gears can be reduced. It is an object of the present invention to provide an ink sheet supply mechanism that can obtain good print quality without fluctuation.

  The subject of the present invention is an ink sheet supply mechanism, which is a bobbin around which an ink sheet is wound, and (1) at the time of printing, on the opposite side of the bobbin where the ink sheet is wound. While fitting the front end portion and transmitting the rotational force to the bobbin integrally with the bobbin, (2) when replacing the ink sheet, the front end portion of the bobbin is not fitted. The joint member separated from the bobbin and the front end surface of the bobbin urged from the end surface of the portion side around which the ink sheet is wound are held, and the front end surface of the bobbin is slidable on the surface. A holder that rotates integrally with the joint member and a convex portion of the holder opposite to the holding portion of the tip surface of the bobbin are fitted to generate torque and rotate the holder. A limiter and a shaft that is inserted into the central non-through opening of the holder and the central through opening of the torque limiter, and whose central axis serves as the rotation center axis of the bobbin, the joint member, the holder, and the torque limiter. It is characterized by providing.

  Hereinafter, various embodiments of the subject of the present invention will be described in detail along with the effects and advantages thereof with reference to the accompanying drawings.

  According to the subject of the present invention, (1) at the time of printing, torque generated from a torque limiter arranged coaxially with the bobbin is transmitted to the bobbin via a holder and a joint member arranged coaxially with the bobbin. As a result, fine fluctuations in tension on the ink sheet do not occur and good print quality can be obtained. (2) When replacing the ink sheet, the joint member is separated from the bobbin without fitting the bobbin. Therefore, the bobbin can be easily removed from the ink sheet supply mechanism.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view showing a configuration of an ink sheet supply mechanism at the time of printing or waiting for printing according to an example of Embodiment 1 of the present invention. In the drawing, a roll-shaped ink sheet (not shown) is wound around the bobbin 1 on the ink sheet supply side, and an end surface 1S1 of one side portion of the bobbin 1 around which the ink sheet is wound has a spring mechanism (not shown). Therefore, it is biased toward the central axis direction of the holder 3 to be described later. A hemispherical portion is formed at the center of the tip surface 1S2 of the tip portion 1E opposite to the end surface 1S1.

  A spring 4 is disposed on the surface of the cylindrical portion 3C of the holder 3, and the spring 4 is connected to the substantially cylindrical joint member 2 that is also arranged on the surface of the cylindrical portion 3C of the holder 3. The bobbin 1 is biased toward the tip portion 1E. Accordingly, the urging force from the spring 4 causes the joint member 2 to slide or slide on the surface of the cylindrical portion 3C of the holder 3 toward the tip portion 1E of the bobbin 1 during printing. Then, the joint member 2 that is sliding is caught by the claw-shaped stopper 3ST provided on the surface of the cylindrical portion 3C of the holder 3, so that the joint member 2 stops its sliding operation. In the state where the sliding operation is stopped, as shown in FIG. 1, between the tip of the joint member 2 formed in a tapered shape on the bobbin 1 side and the stepped portion of the tip 1E of the bobbin 1. Is provided with a gap. The existence of this gap eliminates the need to consider the magnitude relationship between the urging force of the spring that urges the bobbin 1 and the urging force of the spring 4. As shown in FIG. 1, when the spring 4 is extended to the maximum and the joint member 2 stops its sliding operation by contact with the claw-like stopper 3ST, the joint member 2 has the bobbin 1 as shown in FIG. Most of the front end portion 1E is fitted into the opening, and as a result, the joint member 2 is integrated with the front end portion 1E of the bobbin 1, and the rotational force generated by the torque limiter described later or Torque is transmitted to the bobbin 1 itself. Then, a predetermined tension is stably applied to the ink sheet that is pulled from the bobbin 1 by a bobbin (not shown) on the winding side by the transmitted torque.

  The holder 3 is a member that comes into contact with the distal end surface 1S2 of the distal end portion 1E of the bobbin 1 and rotates integrally with the joint member 2 biased by the spring 4. As shown in FIG. 1, a conical shape (hereinafter referred to as a shaft receiving portion) is formed at a substantially central portion of the tip surface of a cylindrical portion 3 </ b> C around which a spring 4 is wound on the surface of the holder 3. Say). As described above, the hemispherical portion of the tip surface 1S2 of the bobbin 1 urged toward the holder 3 by another member (not shown) is in a circular contact state with the shaft receiving portion of the holder 3 Therefore, they are in contact. By this contact, the tip end surface 1S2 of the bobbin 1 is held by the holder 3. As described above, the joint member 2 can slide on the surface of the holder 3 along the axial direction of the cylindrical portion 3 </ b> C of the holder 3.

  Further, on the outer periphery of the joint member 2 and the holder 3 on the front end portion 1E side of the bobbin 1, a tapered portion that functions as a guide mechanism described later is provided.

  The spring 4 always urges the joint member 2 in the direction of the bobbin 1 at the time of printing.

  The members 5 and 6 are first and second torque limiters, respectively (hereinafter, both are simply referred to as torque limiters), and the torque generated from the torque limiter 5 is larger than the torque generated from the torque limiter 6. Although not shown in FIG. 1, each of the torque limiters 5 and 6 includes an outer ring housing (made of plastic) and an inner ring metal part, and generates torque between both members. The torque limiter 5 is connected to the holder 3. That is, two convex portions 3P are formed on the surface of the holder 3 opposite to the holding portion of the tip surface 1S2 of the bobbin 1, and each convex portion 3P is an inner ring of the torque limiter 5. It is fitted in a recess 5C provided in the metal part.

  The torque limiter connecting member 7 connects the torque limiter 5 and the torque limiter 6. More specifically, two convex portions are formed on the portion of the outer ring housing of the torque limiter 5 on the side opposite to the concave portion 5C, and each convex portion of the housing is located above and below the torque limiter connecting member 7. The convex portion 7P is provided in the central peripheral portion of the opposite surface of the torque limiter connecting member 7, and each convex portion 7P is a torque of the torque limiter 6. It is fitted into a recess 6 </ b> C provided on the side facing the limiter 5.

  The torque limiter holding member 8 is a member that holds the torque limiter 6. That is, two convex portions are formed on the portion of the outer ring housing of the torque limiter 6 on the side opposite to the concave portion 6C, and each convex portion of the housing is provided on the upper and lower sides of the torque limiter holding member 8. Two convex portions 8P are provided on the central peripheral portion of the opposite surface of the torque limiter holding member 8, and each convex portion 8P is provided on a shaft stopper 10 to be described later. It is inserted into the recess.

  Each of the holder 3, the torque limiter connecting member 7 and the torque limiter holding member 8 is formed with a ratchet (not shown), for example, and the portions 3, 7, 8 are locked when necessary and rotated. (The locking mechanism is not shown).

  Further, the shaft 9 is inserted into the central non-through opening 3H of the holder 3 and the central through openings (corresponding to the through openings of the inner ring metal part) 5H, 6H of each torque limiter. The other end surface opposite to the one end surface that contacts the bottom surface of the central non-through opening 3H of the holder 3 in the both ends of the shaft 9 is formed in a tapered shape, and the tip end is hemispherical. It is said that. The hemispherical portion at the tip of the shaft 9 is a conical recess formed on the back side of the shaft stopper 10 disposed on the frame 13 of the printer main body (the conical shape is cut out, and the shaft receiving portion (Referred to as a circle contact state). The shaft 9 causes the bobbin caused by the urging force to press the bobbin 1 in the direction of the holder 3 by the contact of the circular line contact and the surface contact of the holder 3 with the bottom surface of the center non-through opening 3H. The axial load received from 1 is received through the holder 3. Moreover, the central axis of the shaft 9 substantially forms the rotation center (axis) of each of the members 3, 5, 6, 7, 8. At the time of printing, the shaft 9 and the joint member 2 also rotate in the rotation direction of the bobbin 1 that supplies the ink sheet toward the take-up bobbin (not shown) as the holder 3 receives the torque. Therefore, the central axis of the shaft 9 also corresponds to the rotation center (axis) of the joint member 2 and the bobbin 1.

  The plate-like member 11 is a bracket, and supports the holder 3 via a bearing 12 so as to be rotatable in the rotation direction of the bobbin 1.

  The frame 13 of the printer main body holds the shaft stopper 10 and the bracket 11 as described above.

  In FIG. 2, the release lever 14 can constrain the joint member 2 that slides in the axial direction of the holder 3 in the opposite direction by overcoming the force of the spring 4. That is, the release lever 14 separates the joint member 2 from the distal end portion 1 </ b> E of the bobbin 1 and presses it in the direction of the holder 3 by the release lever spring 15, which is a larger load than the spring 4. Note that FIG. 2 is a diagram showing a state at the time of printing or waiting for printing, and therefore, one end portion 14E1 of the release lever 14 is not in contact with the convex portion 2P of the side surface portion of the joint member 2. As a result, the joint member 2 has the tip portion 1E of the bobbin 1 fitted in the opening.

  In FIG. 2, a member 16 is attached to a door (not shown) provided in the printer main body for attaching and detaching a cassette or roll-shaped photographic paper containing supply and take-up bobbins to the mechanism. The pressing member is provided. In synchronism with the closing state of the door, the pressing member 16 presses the other end 14E2 of the release lever 14 to overcome the release lever spring 15, and the one end portion 14E1 of the release lever 14 protrudes from the protrusion of the joint member 2. It is possible to move away from the part 2P.

  Since it is configured as described above, torque is generated by the torque limiter 5 between the holder 3 and the torque limiter connecting member 7, and the torque limiter is connected between the torque limiter connecting member 7 and the torque limiter holding member 8. 6 is generated.

  Therefore, when the torque limiter connecting member 7 is locked by the operation of a lock mechanism (not shown), a larger torque is generated from the inner ring metal part in the torque limiter 5 to the holder 3. As a result, the holder 3 rotates in the same rotational direction as that of the bobbin 1, the tip part 1E of the bobbin 1 is fitted into the opening, and is heavier than the joint member 2 biased by the spring 4. The joint member 2 is rotated by applying a load. As a result, the joint member 2 applies rotation in the same direction with a heavier load to the bobbin 1 rotating in the direction in which the ink sheet is supplied to the bobbin on the winding side. By applying this rotational force, a larger tension is stably applied to the ink sheet supplied from the bobbin 1.

  On the other hand, when the torque limiter holding member 8 is locked, torque is transmitted from the inner ring metal portion in the torque limiter 6 to the torque limiter connecting member 7. Here, as described above, since the torque generated from the torque limiter 5 is larger than the torque generated from the torque limiter 6, the torque transmitted from the torque limiter 6 to the torque limiter connecting member 7 is reduced as both loads. As a result of the rotation of the members 7, 5, it occurs in the holder 3. As a result, the holder 3 applies a lighter load to the joint member 2 to rotate the joint member 2, and applies a lighter load to the bobbin 1 in the same direction. By applying this rotational force, a weaker tension is stably applied to the ink sheet supplied from the bobbin 1.

  In the structure of the supply mechanism shown in FIG. 1, a stable tension F is printed according to a known relational expression, that is, a relational expression of (torque T) = (tension F) × (radius r of roll-shaped ink sheet). When the radius r of the ink sheet is relatively large, the torque limiter connecting member 7 is locked to generate a stronger torque T so that it can be applied to the ink sheet supplied from the bobbin 1 sometimes. Thus, when the radius r of the ink sheet is relatively small, a flexible structure is realized so that the torque limiter holding member 8 is locked and a weaker torque T is generated.

  Thus, by locking the torque limiter connecting member 7, the torque limiter holding member 8, or the holder 3 itself, a strong torque is applied to the bobbin 1, a weak torque is applied, or the bobbin 1 is rotated. You can choose to ban.

  Further, as described above, the hemispherical surface of the tip surface 1S2 of the bobbin 1 is pressed against the shaft receiving portion of the holder 3, and the hemispherical tip of the other end portion of the shaft 9 that receives the load from the bobbin 1 is used. Since the portion is pressed against the shaft receiving portion of the shaft stopper 10, the rotation axes of the bobbin 1 and the holder 3 are positioned without shifting in the axial direction and the radial direction of the hemispherical surface of the tip surface 1S2. The

  Further, one end surface of the shaft 9 is in contact with the bottom surface of the non-through opening portion of the holder 3 in a surface contact state, and the other hemispherical surface is in contact with the shaft receiving portion of the shaft stopper 10 in a circular contact state. ing. As described above, the holder 3 is pressed in the direction of the shaft 9 by the bobbin 1, and the shaft 9 is pressed in the direction of the shaft receiving portion of the shaft stopper 10 by the holder 3, so that the shaft 9 and the shaft stopper 10 are The rotational axes of the both 9 and 10 are positioned without shifting in the axial direction and the radial direction of the hemispherical surface at the other end of the shaft 9.

  Further, since the portion where the shaft 9 is in contact with the shaft stopper 10 is sufficiently close to the central axis of the shaft 9 serving as the rotation center, the generation of loss torque due to friction can be suppressed to a minute.

  Further, the shaft 9 is not fixed to another fixing member such as the frame 13 and is held by the surface contact state and the circular line contact state described above. It is possible to avoid the occurrence of rotational loss torque due to the bearing 12 of the holder 3 due to a slight misalignment in manufacturing and assembly.

  At the time of printing, an ink sheet (not shown) wound around the bobbin 1 is pulled, and the bobbin 1 tries to rotate. At this time, the torque limiter connecting member 7 or the torque limiter holding member 8 is locked according to the value of the diameter of the mass portion of the ink sheet wound around the bobbin 1 in a roll shape, and applied to the bobbin 1 as described above. Select the magnitude of torque to be generated.

  Further, when the printing operation is completed, the holder 3 itself can be forcibly locked to prevent the bobbin 1 from rotating in order to prevent the ink sheet from being supplied excessively. .

  Since the joint member 2 can slide on the surface of the cylindrical portion 3C of the holder 3 as described above, (1) FIG. 1 and FIG. 2 are synchronized with the opening and closing of the door on the printer side described above. As shown, in the first state where the bobbin 1 and the joint member 2 are connected, and (2) in the second state where the bobbin 1 and the joint member 2 are not connected, as shown in FIGS. Can be selected. Here, the “first state” means that the joint member 2 slides on the surface of the distal end portion 1E of the bobbin 1 toward the distal end portion 1E side of the bobbin 1, and the distal end portion 1E of the bobbin 1 is By fitting in the opening, the holder 3 and the joint member 2 are rotated together with the bobbin 1. The “second state” means that the joint member 2 slides on the surface of the bobbin 1 in the opposite direction so as to be away from the tip 1E side of the bobbin 1, and is fitted to the tip 1E of the bobbin 1. It is in a state that does not happen. More details are as follows.

  The first state corresponds to a state at the time of printing or standby for printing, and at this time, the door is closed. When the door is closed, the pressing member 16 presses the one end 14E2 of the release lever 14, overcomes the release lever spring 15, and moves the other end 14E1 of the release lever 14 away from the convex portion 2P on the side surface of the joint member 2. (See FIG. 2). As a result, the urging force of the spring 4 causes the joint member 2 to slide in the direction of the bobbin 1, and the joint member 2 is connected to the tip portion 1E of the bobbin 1. By simply closing the door in this manner, the joint member 2 is connected to the tip end portion 1E of the bobbin 1, and the torque generated by the torque limiters 5 and 6 is transmitted to the new bobbin 1 around which the ink sheet is wound. A stable tension can be applied to the ink sheet supplied from the printer.

  On the other hand, the second state is when the ink sheet is replaced, and the door is open. At this time, since the pressing member 16 is separated from the release lever 14, the release lever 14 moves the joint member 2 connected to the tip portion 1 </ b> E of the bobbin 1 toward the holder 3 by the spring force of the release lever spring 15. Push. Since the spring force of the release lever spring 15 is stronger than the spring force of the spring 4, the joint member 2 slides in the direction of the holder 3 so as to move away from the distal end portion 1 </ b> E of the bobbin 1, thereby connecting the bobbin 1 and the joint member 2. Is released (see FIGS. 3 and 4).

  As described above, the release lever 14 having the release lever spring 15 is in the open state when the bobbin 1 is attached and detached, and in synchronization with the opening and closing of the printer door that is closed during printing or standby for printing. By switching the sliding direction of the joint member 2, a lever mechanism for switching between the first state and the second state is formed.

  As shown in FIG. 4, in the case of the second state, when the bobbin 1 is pulled strongly in the direction of the arrow, the bobbin 1 overcomes the force that urges the bobbin 1 toward the holder 3 and The taper shape of the part begins to slide and finally leaves the holder 3 completely. This is the case when replacing a used ink sheet, and corresponds to the operation of removing the bobbin 1. In this way, when the door is opened, the connection state between the joint member 2 and the tip 1E of the bobbin 1 is instantaneously released in synchronism with the opening, so that the user can only hold the holder 3 by pressing the holder 3 side. The bobbin 1 to be replaced can be easily taken out from the ink sheet supply mechanism by simply pushing the bobbin 1 supported by the shaft receiving portion downward as indicated by the arrow.

  In FIG. 5, contrary to the above, when the bobbin 1 after the ink sheet replacement receives a force in the direction of the arrow from the state where it is detached from the ink sheet supply mechanism, each of the release lever 14, the joint member 2, and the holder 3. The tapered portion functions as a guide mechanism when the bobbin 1 is mounted in the ink sheet supply mechanism, and these guide portions use the hemispherical surface of the tip 1E of the bobbin 1 after the ink sheet replacement as the shaft receiving portion of the holder 3. It can lead to smoothly. Thus, the user can easily attach the bobbin 1 after the ink sheet replacement into the ink sheet supply mechanism.

(Modification 1)
Regarding the shape of the contact portion of the shaft 9 and the shaft stopper 10 described as an example in the first embodiment, the shapes of the contact portions are opposite to each other, that is, the tip portion of the shaft 9 is formed by cutting a conical shape. A taper shape and a hemispherical shape connected to the taper shape may be formed on the abutting portion on the back surface side of 10.

(Modification 2)
Further, the holder 3 and the shaft 9 do not have to be separate parts, and may be a single integrated part.

(Modification 3)
In addition, a tapered shape and a non-spherical shape at the other end of the shaft 9 are formed by cutting a conical shape, and the holder 3 is provided with a through-hole through which the shaft 9 passes, so that the bobbin 1 The same effect can be obtained by receiving the hemispherical shape portion of the tip surface 1S2 directly in the shape of the conical shape of the shaft 9 cut out.

(Modification 4)
Further, the number of torque limiters constituting the ink sheet supply mechanism need not be two different torques to be generated, and the torque limiter can be constituted by one or three or more.

(Appendix)
While the embodiments of the present invention have been disclosed and described in detail above, the above description exemplifies aspects to which the present invention can be applied, and the present invention is not limited thereto. In other words, various modifications and variations to the described aspects can be considered without departing from the scope of the present invention.

  The present invention is suitable for application to a printer that records an image by transferring ink from an ink sheet to recording paper.

It is a longitudinal cross-sectional view which shows the structure (1st state) in the time of printing etc. of the ink sheet supply mechanism which concerns on Embodiment 1 of this invention. FIG. 3 is a side view showing a configuration (first state) of the ink sheet supply mechanism according to Embodiment 1 of the present invention during printing. It is a side view which shows the structure (2nd state) at the time of ink sheet replacement | exchange of the ink sheet supply mechanism which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the structure (2nd state) at the time of ink sheet replacement | exchange of the ink sheet supply mechanism which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the structure (2nd state) at the time of ink sheet replacement | exchange of the ink sheet supply mechanism which concerns on Embodiment 1 of this invention.

Explanation of symbols

  1 Bobbin, 2 Joint member, 3 Holder, 4 Spring, 5 (First) Torque limiter, 6 (Second) Torque limiter, 7 Torque limiter connecting member, 8 Torque limiter holding member, 9 Shaft, 10 Shaft stopper, 11 Bracket , 12 Bearing, 13 Frame, 14 Release lever, 15 Release lever spring, 16 Pressing member.

Claims (5)

A bobbin around which an ink sheet is wound;
(1) At the time of printing, one end of the bobbin opposite to the portion around which the ink sheet is wound is fitted to transmit the rotational force to the bobbin integrally with the bobbin. (2) When replacing the ink sheet, a joint member separated from the bobbin without fitting the tip of the bobbin;
A holder that holds the tip end surface of the bobbin that is biased from the end surface on the part side around which the ink sheet is wound and rotates integrally with the joint member that can slide on the surface. When,
A torque limiter that fits the convex portion of the holder opposite to the holding portion of the tip surface of the bobbin, and generates torque to rotate the holder;
A center non-through opening of the holder and a center through opening of the torque limiter, the center axis of which includes the bobbin, the joint member, the holder, and a shaft serving as a rotation center axis of the torque limiter. Features
Ink sheet supply mechanism. The ink sheet supply mechanism according to claim 1,
The other end surface of the shaft opposite to the one end surface contacting the central non-through opening of the holder is in contact with the back surface of the shaft stopper disposed on the frame of the printer body. The shaft supports an axial load received from the bobbin via the holder, and one of the other end surface of the shaft and the back surface contact portion of the shaft stopper is a hemispherical surface. And the other is characterized by a conical recess.
Ink sheet supply mechanism. The ink sheet supply mechanism according to claim 2,
A first state in which the joint member rotates integrally with the bobbin by sliding on the surface of the bobbin toward the front end side of the bobbin and fitting the front end of the bobbin; A mechanism for switching between a second state in which the joint member slides on the surface of the bobbin in a reverse direction so as to be away from the tip end side of the bobbin and does not fit with the bobbin. There,
The first state and the first state are changed by switching the sliding direction of the joint member in synchronism with the opening and closing of the door of the printer, which is opened when the bobbin is attached and detached, and is closed during printing. Further comprising a mechanism having a lever for switching between the second state,
Ink sheet supply mechanism. The ink sheet supply mechanism according to claim 3,
When attaching a new bobbin after ink sheet replacement to the ink sheet supply mechanism, each of the holder, the joint member, and the lever has a mechanism for guiding the new bobbin from a non-holding state to a holding position. Characterized by the
Ink sheet supply mechanism. The ink sheet supply mechanism according to any one of claims 1 to 4, comprising the ink sheet supply mechanism.
Printer.

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