JPH1120286A - Mount structure of ink ribbon cassette in printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mount structure of an ink ribbon cassette which can be mounted smoothly on a mount surface of a printing part without causing an ink ribbon to be twisted or turned over. SOLUTION: An inclined guide rail 13 is provided inside a left and right side frames 2, 3 so that the rear part of the rail 13 is raised, and a limit protrusion 14 is provided at a lower part inside the frames. An ink ribbon cassette 11 has a guide protrusion 21 on either side surface thereof to guide the rail 13. If the cassette 11 is pushed from the rear to the front, the lower part thereof comes into contact with the protrusion 14 and is inclined so that the surface of an ink ribbon is inclined. A printing head 11 has a ribbon guide 15 at the lower part thereof and if the cassette 17 is pushed further, the lower part thereof goes over the protrusion 14 and the ink ribbon whose surface is inclined is fitted into the ribbon guide 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an ink ribbon cassette in a printer having a print head having a print portion directed downward and mounting an ink ribbon cassette between left and right side frames.

[0002]

2. Description of the Related Art For example, there is known a printer such as a flat bed type printer in which a paper transport path is disposed substantially horizontally with respect to a printing unit. In this one,
Since the printing section faces downward and is close to the platen, the lower end face of the printing section, which is the mounting surface of the ink ribbon, cannot be seen. Further, in the case of an ink ribbon cassette (hereinafter simply referred to as a cassette) in which the cassette body is mounted between the left and right side frames, the ink ribbon is stretched long on both the left and right sides. Since the ribbon is easy to loosen, the ribbon is caught by members around the printing unit when the ribbon is mounted, twists or turns up, and moves the ribbon to the mounting surface of the printing unit, making it difficult to mount the ribbon accurately.

Japanese Utility Model Publication No. 1-28211 discloses a ribbon cartridge in a flat bed type printer, in which a horizontally long ribbon cartridge is mounted along the left-right direction of the printer and the ribbon is arranged in a printing portion of a print head facing downward. Are described. However, since the cartridge has a structure in which the guide member provided on the lower surface of the cartridge is inserted into the guide groove provided on the upper surface of the printer main body and the cartridge is translated and mounted, the cartridge is arranged horizontally. The ribbon must be taken out of the ribbon storage section in a direction perpendicular to the ribbon storage section.
° Needs a turning mechanism.

Further, the ribbon is mounted on the printing unit by moving the cartridge in parallel. However, in a structure in which the print head is directed downward, the printing unit is usually difficult to see and is also a narrow portion mechanically. It is difficult to mount the ribbon by simple translation. The mechanism disclosed in Japanese Utility Model Publication No. 1-38211 is a structure for mounting a ribbon cartridge to a printer frame, and does not disclose a technical idea for smoothly mounting a ribbon on a printing portion of a print head facing downward.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a printer having a print head having a print portion arranged downward, and mounting an ink ribbon cassette between left and right side frames. An object of the present invention is to provide an ink ribbon cassette mounting structure that can be smoothly mounted on a mounting surface of a printing unit without causing twisting or twisting of the ribbon.

[0006]

In a printer, a print head has a print portion arranged downward. The ink ribbon cassette (cassette) is horizontally long in the left-right direction. The ribbon is mounted vertically between the left and right side frames of the printer with the surface of the storage section vertically set, and the ink ribbon is stretched right and left at the lower end. I have. It is assumed that the ribbon is arranged on the lower end face of the printing unit with the cassette mounted. The side where the cassette of the printer is mounted is referred to as “front”, and the side of the cassette where the carriage shaft for the print head is located is “rear”.

The printer has left and right side frames,
These have an inclined guide rail at the upper part of the inner surface and a regulating projection at the lower part of the inner surface. The guide rail may have a ridge shape formed to protrude from the inner surface of the frame, or may have a groove shape. Further, they may be formed integrally when the frame is formed, or may be formed by attaching another member. The inclined guide rail arranges the rear part higher than the front part. The cassette has guide protrusions on the upper sides of both sides when the ribbon is set downward, and the guide protrusions are arranged between the left and right side frames so as to be guided by the inclined guide rails. The print head includes a ribbon guide at a lower portion thereof, which is inclined from a front ribbon insertion slot toward a rear ribbon mounting position. The left and right regulating protrusions are insertion holes for a ribbon guide provided in the print head when the printer is viewed through the printer from the left and right directions, and the lower end of the cassette faces the guide protrusion at the front of the inclined guide rail. Place in position. The position where the lower end of the cassette faces the regulation protrusion is the position where the ribbon is guided by the ribbon guide.

The attachment of the ribbon to the printing section of the print head is performed as follows. The ribbon is set in a state where slack has been eliminated by a winding means attached to the ink ribbon cassette as in the related art. With the ribbon down, the ribbon storage section is placed in a vertical vertical position in a vertical direction, the cassette is arranged between the left and right frames, and the guide projections provided on both side surfaces of the cassette are guided by the left and right inclined guide rails. In this state, when the guide rail is in the form of a ridge, the guide protrusion is mounted thereon, and when the guide rail is in the form of a groove, the guide protrusion is fitted in the groove.

The cassette is moved from front to rear along the inclination of the inclined guide rail. When the cassette is located at the front of the inclined guide rail during movement, the lower end of the cassette abuts the regulating protrusions provided on the left and right side frames to restrict movement backward, and only the upper guiding protrusion is inclined. Since the cassette moves rearward along the guide rail, the cassette has a posture in which the upper portion is inclined rearward with respect to the lower portion. As a result, the surface of the ribbon has a lower trailing edge and a higher leading edge, and is inclined in a direction corresponding to the inclination of the guide path in the ribbon guide.

At the same time, since the inclined guide rails are arranged so that the rear portion is higher than the front portion, the cassette moves upward, and the lower end portion of the cassette gets over the regulating projections provided on the left and right side frames. In this state, the ribbon faces the ribbon insertion port of the ribbon guide provided below the print head. Further, when the cassette is pushed rearward along the inclination of the inclined guide rail, the cassette reaches the mounting position of the left and right side frames, and the ribbon is guided along the inclination of the ribbon guide and moves rearward, The printing unit is pulled out downward and is arranged at a mounting position, which is the lower end surface of the printing unit.

According to this configuration, when the cassette is mounted,
When the guide protrusion of the cassette is moved from the front to the rear along the inclined guide rail, first, the lower end of the ink ribbon cassette abuts on the control protrusion to restrict the movement, and the upper part of the ink ribbon cassette is moved relative to the lower part. Since the ribbon is inclined rearward and the surface of the ribbon is inclined, the ribbon can be easily guided to the ribbon insertion port of the ribbon guide provided in the print head. In addition, since the ink ribbon is guided to the mounting surface along the inclination of the ribbon guide, the ribbon can be smoothly mounted on the mounting surface of the printing unit without being twisted or turned up. The following configuration may be added to the above configuration.

Horizontal guide rails are further provided on the inner surfaces of the left and right side frames so as to be continuous with the front side of the inclined guide rails. The horizontal guide rail is arranged at a position where the lower end of the cassette is substantially at the same height as the insertion opening of the ribbon guide while supporting the guide projection. According to this configuration, by positioning the guide projection of the cassette on the horizontal guide rail, the cassette is positioned in the vertical direction, and the ribbon stretched at the lower end of the cassette is substantially the same as the insertion slot of the ribbon guide. Can be easily placed at height. Further, after the ribbon is positioned at the insertion opening of the ribbon guide, the ribbon can be smoothly moved to the mounting surface of the printing unit.

Horizontal guide rails are further provided on the inner surfaces of the left and right side frames at an interval from the inclined guide rails in the vertical direction, and second guide projections are provided on both side surfaces of the cassette. The horizontal guide rail is disposed at a position where the lower end of the cassette is substantially at the same height as the insertion opening of the ribbon guide while supporting the second guide projection. According to this configuration, by supporting the second guide projection of the cassette on the horizontal guide rail, the cassette is positioned in the vertical direction, and the ribbon stretched at the lower end of the cassette is substantially aligned with the insertion opening of the ribbon guide. They can be easily placed at the same height.

Auxiliary guide rails for further supporting both sides of the cassette are provided on the inner surfaces of the left and right side frames, and second guide projections guided by the horizontal guide rails are provided on both sides of the cassette. According to this configuration, both sides of the cassette are supported by the first guide projections (guide projections) for the inclined guide rails and the second guide projections for the auxiliary guide rails when the cassette is mounted. The inclined posture is stable, and the cassette can be moved smoothly.

The auxiliary guide rail is formed continuously behind the horizontal guide rail. With this configuration, the cassette is vertically positioned by supporting the second guide projection of the cassette on the horizontal guide rail, and the ribbon stretched at the lower end of the cassette is substantially aligned with the insertion opening of the ribbon guide. In addition to being able to be easily arranged at the same height, excessive inclination of the cassette can be suppressed, and the cassette can be smoothly moved backward.

Vertical guides are further provided on the inner surfaces of the left and right side frames. The vertical guide is a position for guiding the front of the cassette. According to this configuration, the cassette with the ribbon facing downward can be guided to a predetermined vertical position while maintaining the vertical posture.

A sub-vertical guide is provided on the inner surface of the left and right side frames at the front end of the inclined guide rail, the horizontal guide rail, or the auxiliary guide rail together with the vertical guide. With this configuration, the rear surface of the cassette is guided by the sub vertical guide portion, and the front surface of the cassette is guided by the vertical guide, so that the cassette can be moved more smoothly in the vertical direction.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view showing the printer 1 in a see-through manner, for explaining a first embodiment of the ink ribbon cassette mounting structure of the present invention. FIG. 2 is a front view of a main part of the printer, showing an attached state of an ink ribbon cassette (cassette). FIG.
, The right is the front of the printer 1 and the left is the rear of the printer 1.

The printer 1 is a flat bed type printer and includes left and right side frames 2 and 3 forming side portions of a printer main body, and a lower portion of the left side frame 2 and a lower portion of the right side frame 3. , A substantially horizontal paper guide plate 4 is provided, and the upper surface of the paper guide plate 4 is formed in a flat paper transport path 5.
A platen roller 6 is provided below the center of the paper guide plate 4 in the left-right direction of the printer 1, and the upper part of the peripheral surface thereof is exposed on the transport path 5. In addition, the paper feed rollers 7,
The paper feed rollers 7, 8 are arranged such that their upper peripheral surfaces are exposed on the transport path 5, respectively.

Above the rear part of the paper guide plate 4, a carriage shaft 9 is horizontally suspended between the left and right side frames 2 and 3, and the carriage shaft 9 is provided with a carriage 10
Are movably fitted between the left and right side frames 2 and 3 in the left and right direction. A print head 11 is mounted on the front surface of the carriage 10 with the print unit 12 facing the platen roller 6 below.

On the inner surfaces of the left and right side frames 2 and 3,
The inclined guide rails 13 are provided at substantially the center in the vertical direction so as to face each other.
In the lower part of the inner surface of the, there are provided regulating protrusions 14, 14 facing each other. Also, in the lower part of the print head 11,
A ribbon guide 15 inclined obliquely forward from the ink ribbon (ribbon) mounting position on the lower end surface of the head portion 12
Is provided. Note that the lower side of the front end of the ribbon guide 15 is the insertion port 16 of the ribbon 19. Reference numeral 29 denotes a ribbon mask attached to the front surface of the head section 12 of the print head 11. The ribbon 19 is mounted between the ribbon guide 15 and the ribbon mask 29.

The inclined guide rails 13, 13 are formed by ridges, and the rear part is higher than the front part, and is inclined upward from the front part toward the rear part. In addition, the regulation protrusions 14, 1
4 is disposed at a position facing the insertion opening 16 of the ribbon guide 15 provided in the print head 11 in a perspective view in the left-right direction, as shown in the figure. The positions of the regulating protrusions 14 and 14 are positions where the lower end of the cassette 17 faces when the cassette 17 is mounted.

As shown in FIG. 2 and FIG.
Is provided with arms 18, 18 that are horizontally long in the left-right direction and extend downward on both left and right sides.
A ribbon 19 is stretched between the distal ends of 18. The ribbon 19 is stored in the ribbon storage 17a, and the arm 1
It circulates between 8, 18 as an exposed surface. At the upper right corner of the front surface of the cassette 17, a winding rotary knob 20 for winding the ribbon 19 by manual operation is provided, and on the rear surface of the cassette 17, the printer 1 is coaxial with the rotary knob 20.
An insertion hole 20a for inserting a ribbon feed shaft (not shown) provided on the side is provided.

As shown in FIG. 1 and FIG.
A recess 22 is formed in the upper center of the left and right sides of the cassette 17, and an elastic piece 23 is provided from the front side of the cassette 17 to the rear side of the cassette 17. Has formed. The recess 2 is located below the recess 22.
6 are provided, and similarly, an elastic piece 27 and a claw 28 at the tip thereof are provided.
Is provided.

The upper portion means the upper portion of the cassette 17 in a state in which the ribbon accommodating portion 17a stands upright (the same applies hereinafter). These claw portions 24, 28 are provided in the cassette 17
To the left and right frames 2 and 3
Is inserted into a hole provided in the cassette 17 to maintain the cassette 17 at that position. In this embodiment, the claw portion 24 is also used as the guide protrusion 21. The claw portion 28 is used as a second guide projection 25 in another embodiment (described later).

The cassette 17 has guide projections 21 supported by inclined guide rails 13 on both sides, and is mounted between the left and right side frames 2 and 3 of the printer. At this time, the attachment of the ribbon 19 to the printing unit 12 of the print head 11 is performed as follows. In FIG. 1, reference numerals A, B, C, and D indicate positions and postures on a moving path when the cassette 17 is mounted. Also, ribbon 1
Reference numeral 9 denotes a state in which slack has been eliminated by rotating the take-up rotary knob 20 attached to the cassette 17.

[Step 1] Insert the cassette 17 into the ribbon 1
Reference numeral 9 denotes a vertical posture along a vertical direction facing downward, and is moved downward as it is to be disposed at the front of the print head 11 (reference numeral A in FIG. 1). [Step 2] The cassette 17 is moved backward, and the guide projection 21 is placed on the guide rail 13. Furthermore, cassette 1
7 moves from the front to the rear along the inclination of the inclined guide rail 13, the lower end of the cassette 17, that is, the lower end of the arm 18 is moved to the left and right side frames 2, 3.
Abuts on the regulating protrusion 14 provided on the inner surface of the first member. Therefore, the lower part of the cassette 17 is restricted from moving backward, and only the upper part moves backward, so that the cassette 17 has a posture in which the upper part is inclined backward with respect to the lower part. The surface of the ribbon 19 in the cassette 17 is low at the rear and high at the front, and has an inclination corresponding to the inclination of the ribbon guide 15 (reference numeral B in FIG. 1).

[Step 3] When the cassette 17 is further moved rearward, the guide projection 21 moves upward on the inclined guide rail 13, and the lower end of the cassette 17 is moved to the regulation projection 14 provided on the left and right side frames 2, 3. , Get over 14.
In this state, the ribbon 19 faces the ribbon insertion port 16 of the ribbon guide 15 provided below the print head 11 in a posture along the insertion direction of the insertion port 16 (reference numeral B in FIG. 1).

[Step 4] When the lower end of the cassette 17 gets over the right and left regulating projections 14, 14, the cassette 17
The ribbon 19 enters the insertion opening 16 of the ribbon guide 15 because there is no restriction on the lower end of the ribbon guide 15. Further, when the cassette 17 is pushed backward along the inclination of the inclined guide rail 13, the cassette 17 is
The ribbon 19 moves upward along with the rear part, and the ribbon 19 is guided along the inclination of the ribbon guide 15 and moves rearward and is drawn downward (reference numeral C in FIG. 1). At the mounting position, which is the lower end face of the. In the cassette 17, the ribbon accommodating portion 17a is in a posture along the vertical direction (reference numeral D in FIG. 1).

[Step 5] Similarly, the upper and lower parts of the cassette 17 are pushed in parallel to fit the claws 24 (guide projections 21) into the holes provided in the left and right frames 2 and 3, and finally the cassette 17 is loaded. Finally left and right side frames 2,3
Attach in between.

According to the mounting structure of the cassette 17 described above, when the guide projection 21 of the cassette 17 is moved from the front to the rear along the inclined guide rail 13 at the time of mounting the cassette 17, Abuts the lower end portion of each of the control projections 14, 14 to temporarily restrict lower movement,
Since the upper portion of the cassette 17 is inclined rearward with respect to the lower portion, the surface of the ribbon 19 is inclined low at the rear and high at the front, and the ribbon 19 is oriented along the insertion direction of the insertion slot 16. Therefore, the ribbon 19 can be easily guided to the ribbon insertion port 16 of the ribbon guide 15 provided in the print head 11. Further, the ribbon 19 is smoothly guided to the mounting surface along the inclination of the ribbon guide 15, and the ribbon 19 is twisted or turned up so that the ribbon 1 is bent.
Mounting of 9 does not end abnormally.

FIG. 4 is a schematic side view of the printer 1 for explaining a second embodiment of the mounting structure of the cassette 17. The second embodiment is different from the first embodiment in that
The difference is that horizontal guide rails 30 are further provided on the inner surfaces of the left and right side frames 2 and 3. Horizontal guide rail 30
Is continuously provided on the front side of the inclined guide rail 13,
The cassette 17 is supported in a state where the second guide projection 21 is supported.
Are arranged so that the lower end thereof is at substantially the same height as the insertion opening 16 of the ribbon guide 15.

According to this configuration, the guide projection 21 of the cassette 17 is supported on the horizontal guide rail 30 in step 1. Then, the cassette 17 is positioned in the vertical direction, and the ribbon 19 stretched at the lower end of the cassette 17 has substantially the same height as the insertion port 16 of the ribbon guide 15, and the ribbon 19 is easily arranged at this position. be able to.
In the case of the first embodiment, in step 1, the guide projection 21
Until the cassette 17 is supported by the inclined guide rails 13.
Must be maintained in the proper posture and position. FIG.
When the horizontal guide rail portion 30 is continuously integrated with the inclined guide rail portion 13 as shown in FIG.
After the arrangement of the ribbon 9 at substantially the same height as the insertion opening 16 of the ribbon guide 15, the movement of the ribbon 19 to the mounting surface of the printing unit 12 can be continuously and smoothly performed.

FIG. 5 shows a third embodiment, in which a horizontal guide rail 30 is formed in front of the inclined guide rail 13 at a distance from the inclined guide rail 13 in the vertical direction. In this case, the guide projection 21 of the cassette 17 guided by the inclined guide rail 13 uses the second guide projection 25 guided by the horizontal guide rail 30. Second guide projection 25
The claw portion 28 formed below the claw portion 24 also serves as a guide projection. The other configuration is the same as that of the second embodiment, and a detailed description will be omitted. According to this configuration,
The vertical position of the cassette 17 is determined by supporting the second guide protrusion 25 on the horizontal guide rail 30, and then the first guide protrusion 21 is moved rearward to move the first guide protrusion 21 to the inclined guide 1.
3 can be placed. The subsequent mounting operation is the second
This is the same as the embodiment.

FIG. 6 is a schematic side view of the printer 1 for describing a fourth embodiment of the mounting structure of the cassette 17. In the fourth embodiment, a vertical guide 31 is provided on the inner surfaces of the left and right side frames 2 and 3 in addition to the inclined guide rail 13 and the horizontal guide rail 30.
The vertical guide 31 guides the front surface of the cassette 17 in a vertical posture with the ribbon 19 facing downward on both left and right sides.
Further, an auxiliary guide rail 33 is provided continuously behind the horizontal guide rail 30. Further, a vertical guide portion 31 is continuously and integrally provided below the front end of the horizontal guide rail 30. The upper end of the vertical guide 31 is a receiving surface 34 bent obliquely forward.

On the inner surfaces of the left and right side frames 2 and 3, a sub vertical guide portion 34 is provided downward at the front end of the inclined guide rail portion 13. The distance between the front surface of the sub vertical guide portion 34 and the rear surface of the vertical guide 31 is substantially equal to or slightly larger than the thickness of the cassette 17.

The mounting of the ribbon 19 is performed as follows. [Step 1] The cassette 17 is slid from the lower end between the vertical guide 31 and the sub-vertical guide portion 34 while maintaining the vertical position with the ribbon 19 facing downward (FIG. 6A).
The vertical movement of the cassette 17 can be performed smoothly because the rear surface and the front surface are guided by the vertical guide 31 and the sub vertical guide portion 34. And the second guide projection 25 is the horizontal guide rail 3
When it is placed on the top of the ribbon guide 15, it is supported at that position, and the position of the ribbon 19 is determined at the position of the insertion opening 16 of the ribbon guide 15.

[Step 2] The cassette 17 is pushed backward from the front. Initially, the second guide projection 25 slides and moves on the horizontal guide rail 30, and then the first guide projection 21 above it is placed on the inclined guide rail 13, and the lower part of the cassette 17 is placed on the regulating projection 14. collide. [Step 3] When the cassette 17 is further moved backward, the lower portion of the cassette 17 cannot be moved by the restricting projection 14, so that only the upper portion moves, and the cassette 17 has an upper portion rearward and a lower portion forward. Incline. For this reason, the ribbon 19 is inclined such that the ribbon surface is low at the rear and high at the front. This inclination corresponds to the inclination of the ribbon guide 15.

[Step 4] When the cassette 17 is further pushed backward, the upper first guide projection 21 rises on the inclined guide rail 13, so that it is disengaged from the lower regulation projection 14 and the lower part is gravity. To move backward. The cassette 17
Is further restricted, the movement of the lower part of the cassette 17 is restricted, so that it becomes more difficult to move the whole body backward by increasing the inclination. However, the structure of the fourth embodiment is difficult. Then, when the second guide projection 25 is inclined to some extent, the second guide projection 25 comes into contact with the auxiliary guide rail 33, and further inclination is prevented, so that the parallel movement is smoothly performed while maintaining the inclined posture.

The lower part of the cassette 17 is the regulating projection 1.
4 are disengaged from each other and move rearward due to gravity.
Fit between the ribbon guide 19 and the ribbon mask 29. When the ribbon 19 is fitted, the ribbon surface is substantially aligned with the guide direction of the ribbon guide 15, so that the ribbon 19 is smoothly guided without being twisted or turned up.

[Step 5] When the cassette 17 is further pressed, the upper part reaches the mounting position, the inclined state is gradually released, and when the lower ribbon 19 reaches the position of the printing unit 12, the upper claw part 24 is pressed. , 28 (first and second guide projections 21, 25) fit into the holes provided in the left and right frames 2, 3 and their positions are maintained. Thus, the mounting of the cassette 17 is completed.

The case where the inclined guide rails 13, the horizontal guide rails 30 and the like are formed in the ridges has been described above, but the case where these are constituted by grooves is almost the same. Further, the claw portions 24 and 28 for mounting the cassette 17 on the left and right frames 2 and 3 are used as guide projections, but other portions protruding from both side surfaces of the cassette 17 may be used. Instead, it may be provided specially.

[0043]

According to the first aspect of the present invention, the upper portion of the ink ribbon cassette is moved rearward with respect to the lower portion only by moving the guide projection of the ink ribbon cassette from front to rear along the inclined guide rail. As a result, the ink ribbon can be smoothly attached to the print portion of the print head facing downward. According to the second and third aspects of the present invention, the second guide projection of the ink ribbon cassette is further supported on the horizontal guide rail, whereby the ink ribbon cassette is positioned in the vertical direction, and the ink ribbon is inserted into the insertion opening of the ribbon guide. It can be easily arranged at approximately the same height as. Thereby, the work of mounting the ink ribbon becomes easier.

According to the fourth and fifth aspects of the present invention, at the beginning of the operation of mounting the ink ribbon cassette, the ink ribbon cassette moves rearward in a state of being inclined, but the inclination state becomes excessive. And the ink ribbon cassette can be smoothly moved backward. According to the configuration of the fifth and sixth aspects, at the beginning of the work of mounting the ink ribbon cassette, the ink ribbon cassette with the ink ribbon facing downward can be arranged at the mounting start position in a stable state in which the vertical posture is maintained. .

[Brief description of the drawings]

FIG. 1 is a schematic side view of a printer 1 shown in perspective (first embodiment).

FIG. 2 is a front view of a main part of the printer showing an attached state of the ink ribbon cassette.

FIG. 3 is a perspective view showing a main part of the ink ribbon cassette.

FIG. 4 is a schematic side view of a printer shown in perspective (second embodiment).

FIG. 5 is a schematic side view of a printer as seen through (third embodiment).

FIG. 6 is a schematic side view of a printer as seen through (fourth embodiment).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printer 2 Left side frame 3 Right side frame 4 Paper guide plate 5 Transport path 6 Platen roller 7 Paper feed roller 8 Paper feed roller 9 Carriage shaft 10 Carriage 11 Print head 12 Printing part 13 Inclined guide rail 14 Regulatory projection 15 Ribbon guide Reference Signs List 16 insertion slot 17 ribbon cassette 17a ribbon storage section 18 arm section 19 ink ribbon 20 take-up rotary knob 21 guide projection (first guide projection) 22 concave section 23 elastic piece 24 claw section 25 second guide projection section 26 Recess 27 Elastic piece 28 Claw 29 Ribbon mask 30 Horizontal guide rail 31 Vertical guide 32 Receiving surface 33 Auxiliary guide rail 34 Sub vertical guide

Claims (7)

[Claims] 1. A printer having a print head having a print section facing downward and mounting an ink ribbon cassette between left and right side frames, wherein a side on which the ink ribbon cassette is mounted is located forward, and a carriage shaft is positioned relative to the side. The left and right side frames have inclined guide rails with the rear part positioned higher than the front part at the upper part of the inner surface, a regulating projection at the lower part of the inner surface, and the ink ribbon cassette with the ribbon facing downward. At the upper part of both sides when the ribbon storage part is vertically arranged, there is a guide protrusion arranged so as to be guided by the inclined guide rail, and the print head at the lower part from the ribbon insertion slot at the front to the ribbon at the rear. Equipped with a ribbon guide inclined from top to bottom toward the mounting position, left and right regulating projections support the guiding projection at the front of the inclined guide rail Ink ribbon cassette mounting structure in a printer, wherein a lower end portion of the ink ribbon cassette on the faces ribbon guide is disposed at a position for guiding the ribbon when the. 2. The left and right side frames are provided with horizontal guide rails on the inner surface thereof continuously in front of the inclined guide rails,
2. The ink jet recording apparatus according to claim 1, wherein the lower end portion of the ink ribbon cassette is disposed at a position substantially at the same height as the insertion opening of the ribbon guide with the horizontal guide rail guided by the guide projection of the ink ribbon cassette. A structure for mounting an ink ribbon cassette in a printer. 3. The left and right side frames are provided with horizontal guide rails on the inner surface in front of the inclined guide rails, and spaced apart from the inclined guide rails in the vertical direction, and the ink ribbon cassette is guided on both side surfaces by the horizontal guide rails. Second
And the lower end of the ink ribbon cassette is disposed at a position where the lower end of the ink ribbon cassette is substantially at the same height as the insertion opening of the ribbon guide with the horizontal guide rail guided by the second guide projection of the ink ribbon cassette. The mounting structure of an ink ribbon cassette in the printer according to claim 1, wherein: 4. The left and right side frames further have auxiliary guide rails on the inner surface thereof spaced apart from the inclined guide rails in the vertical direction, with the rear portion being higher than the front portion, and the ink ribbon cassettes having auxiliary guides on both side surfaces. The mounting structure of an ink ribbon cassette in a printer according to claim 1, further comprising a second guide protrusion guided by a rail. 5. The left and right side frames are provided with horizontal guide rails on the inner surface thereof continuously in front of the auxiliary guide rails,
5. The ink jet recording apparatus according to claim 4, wherein the lower end portion of the ink ribbon cassette is disposed at a position substantially at the same height as the insertion opening of the ribbon guide in a state where the horizontal guide rail guides the second guide projection of the ink ribbon cassette. A mounting structure of an ink ribbon cassette in the printer described in the above. 6. The left and right side frames further have a vertical guide on an inner surface, and the vertical guide is arranged at a position for guiding the ink ribbon cassette on both sides of the front surface of the ink ribbon cassette in a vertical posture with the ink ribbon being downward. The mounting structure of an ink ribbon cassette in a printer according to any one of claims 1 to 5, wherein: 7. The mounting of an ink ribbon cassette in a printer according to claim 6, wherein sub vertical guide portions are provided on the inner surfaces of the left and right side frames at the front end of the inclined guide rail, the horizontal guide rail, or the auxiliary guide rail. Construction.