JP7039228B2 - Printer - Google Patents

Description

The present invention relates to a printer.

Patent Document 1 includes a ribbon supply shaft that holds an ink ribbon supplied to a printing unit in a roll shape, and a ribbon winding shaft that winds up a used ink ribbon, and heats the ink ribbon to form an ink ribbon. A thermal transfer type printer that transfers ink to a printing medium and prints the ink is disclosed.

The printer of Patent Document 1 is configured so that the insertion path of the ink ribbon is widened so that a new ink ribbon can be easily transferred from the supply shaft to the take-up shaft when the ink ribbon is replaced.

Japanese Unexamined Patent Publication No. 2009-179010

In the printer of Patent Document 1, both ends of the spool shaft around which the ink ribbon is wound are sandwiched by the spool shaft mounting portions. The spool shaft mounting portion is provided with a coil spring, and the spool shaft is urged inward from both ends.

Therefore, when replacing the spool shaft, it is necessary to move one end of the spool shaft in the direction of contracting the coil spring, separate the other end from the spool shaft mounting portion, and then pull out the spool shaft. Is.

According to the printer of Patent Document 1, although it is easier for the user to carry out the work of bridging the ink ribbon, the user can use the spool as described above by using the limited space in the open state of the printing unit. The shaft must be attached and detached. Therefore, there is still room for improvement in the operation of attaching and detaching the spool shaft.

Therefore, an object of the present invention is to provide a printer capable of improving the workability of replacing an ink ribbon.

According to an aspect of the present invention, a printing unit that prints on a printing medium, a ribbon supply shaft that holds an ink ribbon supplied to the printing unit, and a ribbon winding shaft that winds up the used ink ribbon. A printing unit that is swingably provided and has a thermal head that constitutes the printing unit, a partition member that is swingably provided in the printing unit and partitions between the ink ribbon and the printing medium, and the above. The ribbon supply shaft and the attachment / detachment mechanism for attaching / detaching the ribbon winding shaft are provided, the ribbon supply shaft is provided on the partition member, and the attachment / detachment mechanism is provided at at least one end of the ribbon supply shaft. A notch formed along a part of the outer periphery of the ribbon supply shaft on the side, an opening formed in the notch so that the outer periphery of the ribbon supply shaft can pass through, and the ribbon attached to the notch. Provided is a printer comprising an extruding portion that pushes the supply shaft toward the opening and a regulating portion that regulates the expansion of the opening when the ribbon supply shaft is extruded by the extruding portion .

According to the present invention, it is possible to improve the workability of replacing the ink ribbon in the printer.

FIG. 1 is a perspective view of a printer 100 according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of a printer 100 according to an embodiment of the present invention. FIG. 3 is a schematic configuration diagram showing a state in which the cover 11 and the printing unit 30 of the printer 100 according to the embodiment of the present invention are opened. FIG. 4 is a perspective view illustrating the attachment / detachment mechanism of the ribbon supply shaft 33 and the ribbon take-up shaft 34 of the printer 100 according to the embodiment of the present invention. FIG. 5 is a perspective view illustrating the ribbon supply shaft 33. FIG. 6 is a perspective view illustrating the ribbon winding shaft 34. FIG. 7 is a side view of the ribbon supply shaft 33 and the ribbon winding shaft 34 as viewed from the arrow VII direction shown in FIG. FIG. 8 is a side view showing a state in which the cover 401C covering the ribbon supply shaft 33 and the ribbon take-up shaft 34 attachment / detachment mechanism 401 shown in FIG. 7 is removed. FIG. 9 is a side view showing a state in which the extrusion portion described later is removed from the attachment / detachment mechanisms 401 and 402 of the ribbon supply shaft 33 and the ribbon take-up shaft 34 shown in FIG. FIG. 10 is a perspective view showing an enlarged main part of the attachment / detachment mechanism 401 of the ribbon supply shaft 33 when viewed from the direction of arrow X in FIG. FIG. 11 is a perspective view showing an enlarged main part of the attachment / detachment mechanism 402 of the ribbon take-up shaft 34 when viewed from the direction of arrow XI in FIG.

Hereinafter, the printer 100 according to the embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view of a printer 100 according to an embodiment of the present invention. Further, FIG. 2 is a schematic configuration diagram of the printer 100 according to the embodiment of the present invention.

The printer 100 is a thermal transfer type printer that prints by heating the ink ribbon R and transferring the ink of the ink ribbon R to the printing medium M. The printing medium M is, for example, a label continuum in which a plurality of labels are continuously temporarily attached to a strip-shaped mount.

As shown in FIGS. 1 and 2, the printer 100 includes a housing 10 and a cover 11 that covers an opening of the housing 10. Here, the housing 10 also includes a part of the internal structure constituting the printer 100 main body.

As shown in FIG. 2, the print medium M is held on the medium supply shaft 12 in a state of being wound in a roll shape. As the print medium M, a label without a mount or a fan-fold type medium can also be used.

The end of the cover 11 on one end side is swingably supported by the support shaft 13 provided on the housing 10. By swinging the cover 11 with the support shaft 13 as a fulcrum, the cover 11 can be switched between a closed state in which the opening of the housing 10 is closed (see FIG. 2) and an open state in which the cover 11 is opened (see FIG. 3). ..

The housing 10 is provided with a lock mechanism (not shown) that keeps the cover 11 in the closed state. The lock mechanism is released by operating the lever 14 shown in FIG.

A discharge port 16 is formed between the other end of the cover 11 and the housing 10 to discharge the print medium M printed by the print unit 15 shown in FIG. 2 from the printer 100.

A cutter 17 facing the discharge port 16 is attached to the cover 11 of the present embodiment. As a result, the printed print medium M discharged from the discharge port 16 can be cut. Instead of the cutter 17, various other units such as a peeling unit and a verification machine can be attached to the cover 11.

Further, the cover 11 is provided with an operation unit 19 for operating the printer 100. The operation unit 19 has various operation buttons, a display, a short-range wireless communication module, an LED, and the like. The display may be a touch panel.

Inside the printer 100, a printing unit 30 for printing on the printing medium M, a controller 40 for controlling the operation of the printer 100, and the like are housed.

The printing unit 30 includes a main body portion 31 whose one end side is swingably supported by a support shaft 13, and a thermal head 32 attached to the main body portion 31.

The thermal head 32, together with the platen roller 20 provided in the housing 10, constitutes a printing unit 15 that prints on the printing medium M.

Further, the printing unit 30 prints the ribbon supply shaft 33 that holds the ink ribbon R supplied to the printing unit 15 in a roll shape, the ribbon winding shaft 34 that winds up the used ink ribbon R, and the ink ribbon R. A partition member 35 that partitions the medium M, a guide shaft 36 that defines a transport path for the ink ribbon R from the ribbon supply shaft 33 to the printing unit 15, and an ink ribbon R from the printing unit 15 to the ribbon winding shaft 34. The guide shaft 37, which defines the transport path of the above, is provided. The ribbon supply shaft 33 is detachably attached to the partition member 35. The ink ribbon R of the present embodiment is a front-wound ink ribbon with the surface to which the ink is applied on the outside.

The printing medium M is supplied from the medium supply shaft 12 to the printing unit 15, and is sandwiched between the thermal head 32 and the platen roller 20 together with the ink ribbon R.

When the heat generating element of the thermal head 32 is energized with the printing medium M and the ink ribbon R sandwiched between the thermal head 32 and the platen roller 20, the ink of the ink ribbon R is printed by the heat of the heat generating element. It is transferred to the medium M and printed on the printing medium M.

When the platen roller 20 is rotated forward by a platen drive motor (not shown), the print medium M and the ink ribbon R are conveyed downstream in the transfer direction, and the print medium M is transferred from the discharge port 16 to the outside of the printer 100. It is discharged.

Further, as shown in FIG. 2, the printer 100 includes a reflection sensor 21. The reflection sensor 21 is a sensor that detects eye marks pre-printed at predetermined intervals on the surface of the print medium M opposite to the surface on which printing is performed. Thereby, the position of the print medium M in the transport direction can be detected.

Further, the printer 100 includes a transmission sensor 22 that detects the position of the print medium M in the transport direction.

The transmission sensor 22 receives a light emitting unit 22a as a light emitting unit that emits predetermined light, and a light receiving unit that receives light emitted from the light emitting unit 22a and outputs an electric signal corresponding to the intensity of the received light. It is a sensor having a unit 22b.

For example, when the printing medium M is a label continuum in which a plurality of labels are continuously temporarily attached to a strip-shaped mount at predetermined intervals, there is only a mount portion between two adjacent labels. do.

Since the amount of light transmitted from the light emitting unit 22a differs between the portion where the label exists and the portion where only the mount is present, the intensity of the light received by the light receiving unit 22b changes. As a result, the transmission sensor 22 can detect the position of the print medium M in the transport direction.

As shown in FIG. 2, the partition member 35 is a support portion that rotatably supports the base portion 35a, the shaft portion 35b provided on one end side of the base portion 35a, and the ribbon supply shaft 33 in parallel with the shaft portion 35b. It has a 35c and an engaging portion 35e formed in the central portion of the shaft portion 35b.

The partition member 35 is swingably supported by the main body portion 31 by the shaft portion 35b.

Further, as shown in FIG. 2, the base portion 35a of the partition member 35 extends to a position facing the reflection sensor 21 provided in the housing 10. As a result, a transport path for the print medium M is formed between the reflection sensor 21 and the portion of the partition member 35 facing the reflection sensor 21.

The reflection sensor 21 is a sensor that detects eye marks pre-printed at predetermined intervals on the surface of the print medium M opposite to the surface on which printing is performed. Thereby, the position of the print medium M in the transport direction can be detected.

As shown in FIG. 2, the engaging portion 35e is configured to engage with the engaged portion 11a provided on the cover 11. When the partition member 35 is set at a position (closed position) where the engaging portion 35e engages with the engaged portion 11a, the ribbon supply shaft 33 is housed in the main body portion 31. As a result, the ribbon supply shaft 33 becomes the ribbon supply position for supplying the ink ribbon R to the printing unit 15.

When printing is performed by the printer 100, the cover 11 is closed, and the engaging portion 35e of the partition member 35 is engaged with the engaged portion 11a of the cover 11.

In the present embodiment, the partition member 35 guides the print medium M, so that the print medium M is stably conveyed within a certain distance from the reflection sensor 21. This makes it possible to improve the detection accuracy of the reflection sensor 21.

When the printer 100 is in a printable state, that is, in the state shown in FIG. 2, the partition member 35 automatically guides the print medium M.

In this way, since the print medium M is guided by the partition member 35, it is not necessary to separately provide a guide member for transporting the print medium M within a certain distance from the reflection sensor 21, and the guide member does not need to be provided separately. The work of inserting the print medium M is also unnecessary.

Further, when the cover 11 is changed from the closed state to the open state, the printing unit 30 swings integrally with the cover 11 and the opening of the housing 10 is opened.

This makes it possible to set the print medium M on the printer 100 and perform maintenance on each part in the housing 10.

Further, when the engagement between the engaging portion 35e and the engaged portion 11a is released from the state where the opening of the housing 10 is opened and the partition member 35 is swung toward the housing 10, the partition member 35 is the open position shown in FIG.

As the partition member 35 is in the open position, the ribbon supply shaft 33 and the roll-shaped ink ribbon R held by the ribbon supply shaft 33 move relative to the ribbon winding shaft 34, and the printing medium M moves. It is exposed on the discharge port 16 side.

As a result, the ribbon supply shaft 33 becomes a ribbon replacement position that can be attached to and detached from the printer 100, and the ink ribbon R can be replaced.

The controller 40 is composed of a microprocessor, a storage device such as a ROM or RAM, an input / output interface, a bus connecting these, and the like. Print data from an external computer, a signal from the transmission sensor 18, a signal from the reflection sensor 21, and the like are input to the controller 40 via the input / output interface.

The controller 40 executes a print control program stored in the storage device by a microprocessor, and controls energization of the heat generating element of the thermal head 32, energization of the platen drive motor, and the like.

[Explanation of attachment / detachment mechanisms 401 and 402]
Subsequently, in the printer 100 according to the present embodiment, the attachment / detachment mechanisms 401 and 401 of the ribbon supply shaft 33 and the ribbon take-up shaft 34 in which the ink ribbon R is set will be described.

FIG. 4 is a perspective view illustrating the attachment / detachment mechanism 401 of the ribbon supply shaft 33 of the printer 100 and the attachment / detachment mechanism 402 of the ribbon winding shaft 34 according to the embodiment of the present invention.

The printer 100 includes a attachment / detachment mechanism 401 for attaching / detaching the ribbon supply shaft 33 to / from the printer 100. Further, the printer 100 includes a attachment / detachment mechanism 402 for attaching / detaching the ribbon winding shaft 34 to / from the printer 100.

FIG. 4 also shows the base portion 35a, the shaft portion 35b, and the support portion 35c described in FIGS. 2 and 3.

First, the ribbon supply shaft 33 and the ribbon take-up shaft 34 will be described. FIG. 5 is a perspective view illustrating the ribbon supply shaft 33, and FIG. 6 is a perspective view illustrating the ribbon winding shaft 34.

The ribbon supply shaft 33 has one end 311 and the other end 312, as shown in FIG. The ribbon supply shaft 33 is rotatably held on the outer peripheral 311r of the end portion 311 by the holding member 410 constituting the attachment / detachment mechanism 401 described later.

A groove portion 313 is formed on the outer peripheral portion 312r of the end portion 312. The groove portion 313 is rotatably held by the holding portion 35h formed in the support portion 35c of the partition member 35.

A gear 314 to which a driving force for rotating the ribbon supply shaft 33 is transmitted is arranged on the outer side of the ribbon supply shaft 33 of the groove portion 313 in the axial direction.

The ribbon take-up shaft 34 has one end 316 and the other end 317, as shown in FIG. The ribbon winding shaft 34 is rotatably held on the outer peripheral 316r of the end portion 316 by the holding member 420 constituting the attachment / detachment mechanism 402 described later. A diameter-expanded portion 318 is formed on the outer peripheral 317r of the end portion 317. The enlarged diameter portion 318 is formed so as to be connectable to a gear 319 to which a driving force for rotating the ribbon winding shaft 34 is transmitted.

The ribbon supply shaft 33 and the ribbon take-up shaft 34 described above are attached to the printer 100 as shown in FIG.

That is, the end portion 311 of the ribbon supply shaft 33 can be attached to and detached from the printer 100 by the attachment / detachment mechanism 401. The attachment / detachment mechanism 401 is covered by the cover 401C. Details of the attachment / detachment mechanism 401 will be described later.

The end portion 312 of the ribbon supply shaft 33 is held by the holding portion 35h. The holding portion 35h has an annular plate shape having a notch having an inner diameter substantially the same as the outer diameter of the bottom portion of the groove portion 313 formed along the end portion 312.

Further, an opening 35i for attaching / detaching the groove portion 313 of the ribbon supply shaft 33 is formed in a part of the annulus. That is, it is formed in a C shape.

By having such a structure, the holding portion 35h can be fitted in the groove portion 313, and the ribbon supply shaft 33 can be rotatably held.

The end portion 316 of the ribbon take-up shaft 34 can be attached to and detached from the printer 100 by the attachment / detachment mechanism 402. Details of the attachment / detachment mechanism 402 will be described later.

As shown in FIG. 4, on the end portion 312 side of the ribbon supply shaft 33 and the end portion 317 side of the ribbon winding shaft 34, a gear 319 provided connected to the enlarged diameter portion 318 of the ribbon winding shaft 34 is provided. A gear 320 for transmitting a driving force for rotation is arranged on the gear 314 and the gear 319 provided on the ribbon supply shaft 33. The gear 320 is rotatably held by the gear holding portion 321.

The gear 320 is connected to a drive motor (not shown). The drive motor is controlled so that a required amount of ink ribbon is fed out from the ribbon supply shaft 33.

Further, the gear holding portion 321 includes a cover portion 322 that covers the gear 319. Although not shown in FIG. 4, the ribbon take-up shaft 34 is rotatably held in the cover portion 322.

Subsequently, the attachment / detachment mechanism 401 of the ribbon supply shaft 33 and the attachment / detachment mechanism 402 of the ribbon winding shaft 34 will be described.

FIG. 7 is a side view of the ribbon supply shaft 33 and the ribbon winding shaft 34 as viewed from the arrow VII direction shown in FIG.

As shown in FIG. 4, the attachment / detachment mechanism 401 is arranged at the end 311 of the ribbon supply shaft 33. As shown in FIG. 7, the attachment / detachment mechanism 401 is covered with the cover 401C.

The ribbon take-up shaft 34 is attached to the printer 100 using a member (not shown in FIGS. 4 and 7).

FIG. 8 is a side view showing a state in which the cover 401C covering the ribbon supply shaft 33 and the ribbon take-up shaft 34 attachment / detachment mechanism 401 shown in FIG. 7 is removed. Further, FIG. 9 is a side view showing a state in which the extrusion portions 431 and 440 described later are removed from the attachment / detachment mechanisms 401 and 402 of the ribbon supply shaft 33 and the ribbon take-up shaft 34 shown in FIG.

First, the attachment / detachment mechanism 401 of the ribbon supply shaft 33 will be described.

As shown in FIGS. 7 and 8, the attachment / detachment mechanism 401 includes a holding member 410 for holding the ribbon supply shaft 33 with respect to the printer 100, and an opening member 430 for releasing the ribbon supply shaft 33 from the holding member 410. Be prepared.

Further, as shown in FIGS. 8 and 9, the holding member 410 includes a notch 411, an opening 412 formed in the notch 411, and a regulation portion 413.

The cutout portion 411 is formed in a shape along a part of the outer circumference 311r of the end portion 311 of the ribbon supply shaft 33 at the end portion 311 of the ribbon supply shaft 33. The notch 411 has a shape along the outer circumference 311r of the end 311 of the ribbon supply shaft.

The opening 412 is formed to have a width through which the outer peripheral 311r of the end 311 of the ribbon supply shaft 33 can pass.

That is, the notch 411 has an annular plate shape in which the notch 411 having an inner diameter substantially the same as the outer diameter of the end 311 is formed, and the holding member 410 is formed in a C shape.

The regulating portion 413 is formed adjacent to the opening 412. The regulating portion 413 is formed so as to extend from the opening 412 toward the notch 411 side. A gap 414 is formed between the outside of the opening 412 and the regulating portion 413 by the regulating portion 413.

Subsequently, the opening member 430 will be described.

FIG. 10 is a perspective view showing the attachment / detachment mechanism 401 of the ribbon supply shaft 33 in an enlarged manner when viewed from the direction of arrow X in FIG.

As shown in FIGS. 8 and 10, the opening member 430 includes an extrusion unit 431 and an operation unit 432 operated by the user.

The extrusion portion 431 is provided with a contact surface 431s that abuts on the outer peripheral 311r of the end portion 311 of the ribbon supply shaft 33 mounted on the cutout portion 411, and the ribbon supply shaft 33 mounted on the cutout portion 411 is directed toward the opening 412. It is formed to be extruded.

Specifically, the opening member 430 includes an end portion 433 of the extrusion portion 431 with a swing shaft 434 for swinging the extrusion portion 431 in a direction intersecting the axial direction of the ribbon supply shaft 33.

The operating portion 432 is formed so as to extend from the end portion 433 of the extruded portion 431 in which the swing shaft 434 is formed to the opposite side of the extruded portion 431 via the swing shaft 434.

Further, the holding member 410 is usually formed of a resin material used for industrial products.

With such a configuration, as shown in FIG. 10, when the operation unit 432 is pushed down by the user in the direction of arrow D, the opening member 430 swings with respect to the holding member 410. It swings around the shaft 434 as the center of rotation, and the extruded portion 431 rises in the direction of the arrow U and shifts to the position indicated by the dotted line.

At this time, the contact surface 431s of the extruded portion 431 abuts on the outer peripheral 311r of the end portion 311 of the ribbon supply shaft 33, and the contact surface 431s moves the end portion 311 toward the opening 412.

At this time, the end portion 311 of the ribbon shaft can pass through the opening 412 while expanding the space between the openings 412 by utilizing the elasticity of the material.

As a result, the end portion 311 of the ribbon supply shaft 33 is separated from the notch portion 411 in the direction of the white arrow.

When the ribbon supply shaft 33 is attached to the holding member 410, the ribbon supply shaft 33 is pushed toward the notch 411 of the holding member 410 in the direction opposite to the white arrow. At this time, since the holding member 410 is formed with a gap 414, the opening 412 is temporarily widened toward the gap 414. As a result, the end portion 311 of the ribbon supply shaft 33 is accommodated in the notch portion 411.

Therefore, according to the printer 100 according to the embodiment of the present invention, the ribbon supply shaft 33 can be easily attached and detached by providing the above-mentioned configuration. This makes it possible to improve the workability of replacing the ink ribbon R by the user.

Further, in the attachment / detachment mechanism 401 of the printer 100 according to the present embodiment, a regulation portion 413 is formed adjacent to the opening 412.

Therefore, even if the distance between the openings 412 is temporarily widened when the end 311 of the ribbon supply shaft 33 is detached from the opening 412 or when the ribbon supply shaft 33 is mounted, the restricting portion 413 expands the opening 412. Be regulated. This makes it possible to prevent the opening 412 from being damaged due to the opening 412 being excessively widened.

Subsequently, the attachment / detachment mechanism 402 of the ribbon take-up shaft 34 will be described.

As shown in FIGS. 7 and 8, the attachment / detachment mechanism 402 includes a holding member 420 for holding the ribbon winding shaft 34, and an opening member 440 for releasing the ribbon winding shaft 34 from the holding member 420.

As shown in FIGS. 8 and 9, the holding member 420 includes a cutout portion 421, an opening portion 422 formed in the cutout portion 421, and a regulating portion 423.

The cutout portion 421 has a shape along a part of the outer circumference 316r of the end portion 316 of the ribbon winding shaft 34 at the end portion 316 of the ribbon winding shaft 34.

The opening 422 is formed to have a width through which the outer peripheral 316r of the end portion 316 of the ribbon winding shaft 34 can pass.

That is, the notch 421 has an annular plate shape in which a notch 421 having an inner diameter substantially the same as the outer diameter of the end 316 is formed, and the holding member 420 is formed in a C shape. ..

Further, the regulating portion 423 is formed adjacent to the opening portion 422, and is formed so as to extend from the opening portion 422 toward the notch portion 421. A gap 425 is formed between the outside of the opening 422 and the regulation portion 423 by the regulation portion 423.

Further, the holding member 420 is usually formed of a resin material used for industrial products.

Subsequently, the opening member 440 will be described.

FIG. 11 is a perspective view showing an enlarged main part when viewed from the arrow XI direction in FIG. 8 for explaining the attachment / detachment mechanism 402 in the ribbon winding shaft 34.

As shown in FIG. 11, the opening member 440 includes an extrusion unit 441 and an operation unit 442 operated by the user.

The extruded portion 441 is provided with a contact surface 441s that abuts on the outer circumference 316r of the end portion 316 of the ribbon winding shaft 34 mounted on the cutout portion 421, and opens the ribbon winding shaft 34 mounted on the cutout portion 421 at the opening 422. It is formed to push toward.

Specifically, the opening member 440 includes an end portion 443 of the extrusion portion 441 with a swing shaft 444 for swinging the extrusion portion 441 in a direction intersecting the axial direction of the ribbon winding shaft 34.

(CL4)
The operation portion 442 is formed so as to extend from the end portion 443 of the extrusion portion 441 in which the swing shaft 444 is formed to the same side as the extrusion portion 441 with respect to the swing shaft 444.

That is, the extrusion portion 441 and the operation portion 442 are formed so that the angle θ formed by each other on the swing shaft 444 is an acute angle.

By having such a configuration, as shown in FIG. 11, when the operation unit 442 is moved in the direction of the arrow P by the user, the opening member 440 swings with respect to the holding member 420. It swings around the moving shaft 444 as the center of rotation, and the extruded portion 441 moves in the direction of the arrow R to shift to the position indicated by the dotted line.

At this time, the contact surface 441s in the extruded portion 441 abuts on the outer peripheral 316r of the end portion 316 of the ribbon winding shaft 34, and the contact surface 441s moves the end portion 316 toward the opening portion 422.

The end 316 of the ribbon shaft can use the elasticity of the material to pass through the openings 422 while widening the spacing between the openings 422.

As a result, the end portion 316 of the ribbon winding shaft 34 is separated from the notch portion 421 in the direction of the white arrow.

When the ribbon take-up shaft 34 is attached to the holding member 420, the ribbon take-up shaft 34 is pushed toward the notch 421 of the holding member 420 in the direction opposite to the white arrow. At this time, since the holding member 420 is formed with the gap 424, the opening 422 is temporarily widened toward the gap 424. As a result, the end portion 316 of the ribbon take-up shaft 34 is accommodated in the notch portion 421.

Therefore, according to the printer 100 according to the embodiment of the present invention, the ribbon winding shaft 34 can be easily attached and detached by providing the above-mentioned configuration. This makes it possible to improve the workability of replacing the ink ribbon R by the user.

Further, the attachment / detachment mechanism 402 in the printer 100 according to the present embodiment is formed with a regulation portion 423 adjacent to the opening 422.

Therefore, even if the distance between the openings 422 is temporarily widened when the end 316 of the ribbon supply shaft 33 is detached from the opening 422 or when the ribbon supply shaft 33 is mounted, the regulation portion 423 expands the opening 422. Be regulated. This makes it possible to prevent the opening 422 from being damaged due to the opening 422 being excessively widened.

[Other embodiments]
Although the embodiment of the present invention has been described above, the above-described embodiment is only one of the application examples of the present invention, and the purpose is to limit the technical scope of the present invention to the specific configuration of the above-described embodiment. is not it.

The above-mentioned attachment / detachment mechanism 401 can be applied to the ribbon winding shaft 34. Similarly, the attachment / detachment mechanism 402 can be applied to the ribbon supply shaft 33.

For example, in the attachment / detachment mechanism 401, the operation unit 432 may be formed on the opposite side of the extrusion unit 431 via the swing shaft 434, and the extrusion unit 431 and the operation unit 432 have the shapes shown in the drawings. Not limited.

Further, the ink ribbon R of the present embodiment may be a back-wound link ribbon with the ink-coated surface inside.

Similarly, in the attachment / detachment mechanism 402, the operation portion 442 may be arranged so as to have an acute angle with the extrusion portion 441, and is not limited to the shape shown in the figure.

10 Housing 11 Cover 11a Engagement part 12 Medium supply shaft 13 Support shaft 14 Lever 15 Printing part 16 Discharge port 17 Cutter 18 Transmission sensor 19 Operation unit 20 Platen roller 21 Reflection sensor 22 Transmission sensor 22a Light emitting unit 22b Light receiving unit 30 Printing Unit 31 Main body 32 Thermal head 33 Ribbon supply shaft 34 Ribbon take-up shaft 35 Partition member 35a Base 35b Shaft 35c Support 35e Engagement 35h Holding 35i Opening 36 Guide shaft 37 Guide shaft 40 Controller 100 Printer 311 End 311r Outer circumference 312 End part 312r Outer circumference 313 Groove part 314 Gear 316 End part 316r Outer circumference 317 End part 317r Outer circumference 318 Diameter expansion part 319 Gear 320 Gear 321 Gear holding part 322 Cover part 401 Detachment mechanism 401C Cover 402 412 Opening 413 Restriction 414 Gap 420 Holding member 421 Notch 422 Opening 423 Restriction 424 Gap 425 Gap 430 Opening member 431 Extruded part 431s Contact surface 432 Operation part 433 End part 434 Swing shaft 440 Extruded part 441s Contact surface 442 Operation part 443 End part 444 Swing shaft

Claims (5)

A printing unit that prints on a printing medium and
A ribbon supply shaft that holds the ink ribbon supplied to the printing unit, and
A ribbon winding shaft that winds up the used ink ribbon,
A printing unit that is swingably provided and has a thermal head that constitutes the printing unit, and a printing unit.
A partition member that is swingably provided on the printing unit and partitions between the ink ribbon and the printing medium.
A detachable mechanism for attaching or detaching the ribbon supply shaft and the ribbon winding shaft, and
Equipped with
The ribbon supply shaft is provided on the partition member, and the ribbon supply shaft is provided on the partition member.
The attachment / detachment mechanism is
A notch formed along a part of the outer circumference of the ribbon supply shaft on at least one end side of the ribbon supply shaft,
An opening formed in the notch so that the outer circumference of the ribbon supply shaft can pass through,
An extruded portion that pushes the ribbon supply shaft attached to the notch toward the opening, and an extruded portion.
When the ribbon supply shaft is extruded by the extrusion portion, the regulation portion that regulates the expansion of the opening and the regulation portion.
A printer equipped with. The printer according to claim 1 .
At one end of the extruded portion, a swinging shaft for swinging the extruded portion in a direction intersecting the axial direction of the ribbon supply shaft in contact with the notch portion is provided.
The extruded portion is a printer mounted swingably on the swing shaft. The printer according to claim 2 .
A printer provided with an operation unit formed so as to extend to the opposite side of the extrusion unit via the swing shaft. The printer according to claim 2 .
A printer provided with an operation unit formed so as to extend to the same side as the extrusion unit with respect to the swing axis. The printer according to claim 3 .
A printer formed so that the angle formed by the extrusion portion and the operation portion of the swing shaft is an acute angle.

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