Printer

Abstract

The present invention belongs to the technical field of industrial printing, and discloses a printer. The ribbon unwinding reel of the printer is used for unwinding the ribbon, and the ribbon winding reel is used for winding the ribbon. The ribbon winding reel is provided with a winding reel motor for driving the movement of the ribbon. The movable frame is slidably arranged on the frame along a first direction. When the movable frame moves, the total length of the conveying path always remains unchanged, which will not cause the ribbon to be tensioned or slackened, and thus will not affect the movement of the ribbon driven by the winding reel motor. The driving assembly is used to drive the movable frame to reciprocally slide relative to the frame along the first direction, and the printing device is used to print on the printing medium. The printer can drive the movement of the ribbon through the winding reel motor, and at the same time drive the movable frame to move relative to the frame along the first direction through the driving assembly, thereby driving the movement of the ribbon relative to the printing device, increasing the movement speed of the ribbon relative to the printing device, and improving the length of the printed text within one printing cycle.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial printing, and particularly to a printer. Background Art

[0002] A continuous industrial printer is usually provided with a ribbon, and a print head contacts the ribbon to print on a printing medium.

[0003] In one of the prior art solutions, motors are provided on a ribbon take-up reel and a ribbon pay-out reel. The motors drive the ribbon to move along a preset path, and a print head driving member drives the print head to press down so that the print head contacts the ribbon. However, in this solution, only the motors provided on the ribbon take-up reel and the ribbon pay-out reel drive the ribbon to move, and the moving speed of the ribbon relative to the print head is slow, resulting in low printing efficiency.

[0004] In another prior art solution, during printing, the ribbon remains stationary relative to a frame, and a mounting plate movably provided on the frame drives the print head to move relative to the ribbon to complete printing. However, the length of the printed text in this solution is the moving distance of the mounting plate, and the length of the printed text in one printing cycle is still short, resulting in low printing efficiency. Summary of the Invention

[0005] The present invention provides a printer to solve the problem of low printing efficiency of printers in the prior art.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A printer, comprising:

[0008] A frame;

[0009] A ribbon pay-out reel for paying out a ribbon;

[0010] A ribbon take-up reel for taking up the ribbon, and a take-up reel motor for driving the ribbon to move is provided on the ribbon take-up reel;

[0011] A movable frame is slidably provided on the frame along a first direction. The movable frame includes two first rollers spaced along the first direction and two second rollers spaced along the first direction. The first rollers and the second rollers are spaced along a second direction, and the second direction forms an angle with the first direction. The movable frame has a conveying path for conveying the ribbon. The conveying path is arranged around the two first rollers and the two second rollers, and both the two first rollers and the two second rollers are located inside the conveying path. The inlet end and the outlet end of the conveying path are always located between the two first rollers, and the part of the conveying path located between the two first rollers is parallel to the first direction;

[0012] A driving assembly for driving the movable frame to reciprocally slide relative to the frame along a first direction;

[0013] A printing device, movably arranged on the frame and capable of driving the ribbon located between two second rollers to move for printing on a printing medium.

[0014] As a preferred solution of the printer, the driving assembly can drive the movable frame to move along the first direction from the inlet end of the conveying path towards the outlet end of the conveying path, and simultaneously drive the printing device to move, so as to drive the ribbon located between two second rollers to move.

[0015] As a preferred solution of the printer, the driving assembly includes a driving motor, a cam arranged at the output end of the driving motor, and a connecting rod rotatably connected to the cam. One end of the connecting rod away from the cam is rotatably connected to the movable frame. The position where the cam and the connecting rod are rotatably connected is spaced from the rotation center of the cam. The cam is used to drive the printing device to move.

[0016] As a preferred solution of the printer, the printing device has an abutting block and a print head arranged on the abutting block. The printing device can move relative to the frame and has a printing position and a non-printing position. When the printing device is at the printing position, the print head can print on the printing medium. When the printing device is at the non-printing position, the print head is separated from the ribbon. The outer wall of the cam has a working section and a non-working section. The distance between the rotation center of the cam and the working section is greater than the distance between the rotation center of the cam and the non-working section. When the movable frame moves along the first direction from the inlet end of the conveying path towards the outlet end of the conveying path, the working section can abut against the abutting block to drive the print head to move to the printing position. When the movable frame moves along the first direction from the outlet end of the conveying path towards the inlet end of the conveying path, the non-working section can abut against the abutting block to keep the print head always at the non-printing position.

[0017] As a preferred solution of the printer, it further includes an elastic member. The elastic member is arranged between the print head and the frame and is used to provide an elastic force for making the abutting block abut against the outer wall of the cam.

[0018] As a preferred solution of the printer, the outer wall of the abutting block is cylindrical, and the abutting block is rotatably arranged on the cam, and the outer wall of the cam is in rolling contact with the outer wall of the abutting block.

[0019] As a preferred embodiment of the printer, the printer further includes a pay-off roller disposed between the ribbon supply reel and the movable frame, and the pay-off roller is configured to convey the ribbon wound around the ribbon supply reel to the inlet end of the conveying path.

[0020] As a preferred embodiment of the printer, the printer further includes a take-up roller disposed between the movable frame and the ribbon take-up reel, and the take-up roller is configured to convey the ribbon located at the outlet end of the conveying path to the ribbon take-up reel.

[0021] As a preferred embodiment of the printer, the portion of the conveying path between the first roller and the second roller is perpendicular to the first direction.

[0022] As a preferred embodiment of the printer, the frame is provided with two slide rails extending in the first direction. The movable frame includes a frame body. The two first rollers and the two second rollers are both disposed on the frame body. The frame body has two sliding grooves, and the two slide rails are respectively in sliding fit with the two sliding grooves.

[0023] The beneficial effects of the present invention are as follows:

[0024] The present invention provides a printer, which includes a frame, a ribbon unwinding reel, a ribbon winding reel, a movable frame, a driving assembly, and a printing device. The ribbon unwinding reel is used for unwinding the ribbon; the ribbon winding reel is used for winding the ribbon, and a winding reel motor for driving the movement of the ribbon is provided on the ribbon winding reel. The movable frame is slidably arranged on the frame in a first direction. The movable frame includes two first rollers arranged at intervals in the first direction and two second rollers arranged at intervals in the first direction. The first rollers and the second rollers are arranged at intervals in a second direction, and the second direction forms an angle with the first direction. The movable frame has a conveying path for conveying the ribbon, and the conveying path is arranged around the two first rollers and the two second rollers, and both the two first rollers and the two second rollers are located inside the conveying path. The inlet end and the outlet end of the conveying path are always located between the two first rollers, and the part of the conveying path located between the two first rollers is parallel to the first direction. Thus, when the movable frame moves, the total length of the conveying path always remains unchanged, and the ribbon will not be tensioned or slackened, so that the movement of the ribbon driven by the winding reel motor will not be affected. The driving assembly is used for driving the movable frame to reciprocally slide relative to the frame in the first direction. The printing device is movably arranged on the frame and can drive the ribbon located between the two second rollers to move so as to print on a printing medium. This printer can drive the movement of the ribbon through the winding reel motor. Compared with the printers in the prior art that only have a motor, this printer can also drive the movable frame to move relative to the frame in the first direction through the driving assembly, thereby driving the ribbon to move relative to the printing device, increasing the movement speed of the ribbon relative to the printing device, improving the length of the printed text within one printing cycle, and enhancing the printing efficiency; compared with the printers in the prior art that also have a mounting plate, the distance that the ribbon moves relative to the printing device within one printing cycle of this printer is twice the distance that the movable frame moves, thus improving the length of the printed text within one printing cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the printer in an embodiment of the present invention Figure 1 ;

[0026] Figure 2 is a schematic structural diagram of the printer in an embodiment of the present invention Figure 2 ;

[0027] Figure 3 is Figure 2 an enlarged view of the E position in

[0028] Figure 4 is a schematic structural diagram of the printer in an embodiment of the present invention Figure 3 .

[0029] In the figure:

[0030] 100, ribbon;

[0031] 1. Frame; 11. Slide rail;

[0032] 2. Ribbon unwinding reel; 21. Unwinding roller;

[0033] 3. Ribbon winding reel; 31. Winding reel motor; 32. Winding roller;

[0034] 4. Movable frame; 41. First roller; 42. Second roller; 43. Frame body;

[0035] 5. Driving assembly; 51. Driving motor; 52. Cam; 521. Working section; 522. Non - working section; 53. Connecting rod;

[0036] 6. Printing device; 61. Abutting block; 62. Print head; 63. Elastic member. Detailed implementation mode

[0037] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0038] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0040] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", and "right" are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of description and simplifying the operations, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] Continuous industrial printers are usually provided with a ribbon. Motors are provided on the ribbon take-up reel and the ribbon pay-out reel. The motors drive the ribbon to move along a preset path, and drive the print head to press down through a print head driving member, so that the print head contacts the ribbon, and the print medium in contact with the ribbon is printed through the print head. However, in this solution, only the motors provided on the ribbon take-up reel and the ribbon pay-out reel are used to drive the ribbon to move, and the moving speed of the ribbon relative to the print head is slow, resulting in low printing efficiency.

[0042] In view of the above problems, this embodiment provides a printer to solve the problem of low printing efficiency in the prior art where only the motors provided on the ribbon take-up reel and the ribbon pay-out reel are used to drive the ribbon to move. This printer can be a household printer or a continuous industrial printer and is used in the field of industrial printing technology.

[0043] Refer to Figures 1 - 4 , the printer includes a frame 1, a ribbon pay-out reel 2, and a ribbon take-up reel 3. The ribbon pay-out reel 2 is used for unwinding the ribbon 100; the ribbon take-up reel 3 is used for winding the ribbon 100. A take-up reel motor 31 for driving the ribbon 100 to move is provided on the ribbon take-up reel 3. The take-up reel motor 31 can drive the ribbon 100 wound on the ribbon pay-out reel 2 to be conveyed to the ribbon take-up reel 3 along a certain path.

[0044] Continue to refer to Figures 1 - 4 , the printer further includes a movable frame 4. The movable frame 4 is slidably arranged on the frame 1 in a first direction. The movable frame 4 includes two first rollers 41 arranged at intervals in the first direction and two second rollers 42 arranged at intervals in the first direction. The first rollers 41 and the second rollers 42 are arranged at intervals in a second direction, and the second direction forms an angle with the first direction. Among them, the first direction is the Figure 1 and Figure 2 AB direction in Figure 1 and Figure 2in the CD direction. The movable frame 4 has a conveying path for conveying the ribbon 100. The conveying path is arranged around two first rollers 41 and two second rollers 42. Both the two first rollers 41 and the two second rollers 42 are located inside the conveying path. The inlet end and the outlet end of the conveying path are always located between the two first rollers 41. The part of the conveying path located between the two first rollers 41 is parallel to the first direction. With such an arrangement, when the movable frame moves, the total length of the conveying path always remains unchanged, and the ribbon will not be tensioned or slackened, so that the movement of the ribbon driven by the take-up reel motor will not be affected.

[0045] Specifically, the conveying path of the movable frame 4 includes the following parts: the part from the inlet end to the first of the two first rollers 41, the part from the first of the two first rollers 41 to the first of the two second rollers 42, the part located between the two second rollers 42, the part from the second of the two second rollers 42 to the second of the two first rollers 41, and the part from the second of the two first rollers 41 to the outlet end. Among them, the part from the inlet end to the first of the two first rollers 41 and the part from the second of the two first rollers 41 to the outlet end are always parallel to the first direction, while the part from the first of the two first rollers 41 to the first of the two second rollers 42 and the part from the second of the two second rollers 42 to the second of the two first rollers 41 are always parallel to the second direction. The part located between the two second rollers 42 is parallel to the first direction when the printing device 6 does not drive the ribbon 100 to move. In this embodiment, the first direction is perpendicular to the second direction, and the parts of the conveying path located between the first roller 41 and the second roller 42 are all perpendicular to the first direction.

[0046] Optionally, the movable frame 4 further includes a frame body 43. The first roller 41 and the second roller 42 are both rotatably arranged on the frame body 43. The ribbon 100 is in rolling cooperation with the outer peripheral walls of the first roller 41 and the second roller 42.

[0047] Continue to refer to Figures 1 - 4, the printer further includes a driving component 5 and a printing device 6. The driving component 5 is used to drive the movable frame 4 to reciprocate relative to the frame 1 along a first direction; the printing device 6 is movably arranged on the frame 1. In this embodiment, the printing device 6 is rotatably arranged on the frame 1, while in other embodiments, the printing device 6 can also be slidably arranged on the frame 1. The printing device 6 can drive the ribbon 100 located between the two second rollers 42 to move, so as to print on the printing medium. This printer can drive the ribbon 100 to move through the take-up reel motor 31. Compared with the printers in the prior art that only have a motor, this printer can also drive the movable frame 4 to move relative to the frame 1 along the first direction through the driving component 5, thereby driving the ribbon 100 to move relative to the printing device 6, thus increasing the moving speed of the ribbon 100 relative to the printing device 6, improving the length of the printed text within one printing cycle, and enhancing the printing efficiency; compared with the printers in the prior art that also have a mounting plate, the distance that the ribbon 100 moves relative to the printing device 6 within one printing cycle of this printer is twice the distance that the movable frame 4 moves, thereby improving the length of the printed text within one printing cycle.

[0048] Continue to refer to Figures 1 - 4 , it can be understood that the first direction specifically includes the direction from the inlet end of the conveying path towards the outlet end of the conveying path and the direction from the outlet end of the conveying path towards the inlet end of the conveying path, and the above two directions are opposite. The driving component 5 can drive the movable frame 4 to move along the first direction from the inlet end of the conveying path towards the outlet end of the conveying path, and at the same time drive the printing device 6 to move, so as to drive the ribbon 100 located between the two second rollers 42 to move. The specific moving direction forms an angle with the first direction, so that the printing device 6 can complete printing through the ribbon 100.

[0049] Among them, taking one reciprocating movement of the printing device 6 as one printing cycle, and only when the movable frame 4 moves along the first direction from the inlet end of the conveying path towards the outlet end of the conveying path, the printing device 6 presses down on the ribbon 100 for printing. When the movable frame 4 moves along the first direction from the outlet end of the conveying path towards the inlet end of the conveying path, the printing device 6 does not perform printing operations. The length of the printed text within one printing cycle of this printer is L, and the length of the printed text is the distance that the ribbon 100 moves relative to the printing device 6 when the printing device 6 performs printing operations; among them, the distance that the ribbon 100 is driven to move by the take-up reel motor 31 is L1, and the distance that the movable frame 4 moves relative to the frame 1 is L2. Since the ribbon 100 and the movable frame 4 form a structure similar to a movable pulley, the distance that the ribbon 100 moves relative to the frame 1 is twice the distance that the movable frame 4 moves relative to the frame 1, that is, 2L2, and the length of the printed text is the superposition of the above two distances, that is, L = L1 + 2L2.

[0050] In addition, when the printer is used as a packaging bag printer for printing texts such as production dates or batch numbers on packaging bags, the printer also has the following effects: for the printing of packaging bags, in order to ensure the printing effect, the ribbon needs to move synchronously with the packaging bag. In the traditional solution, when only the motor arranged on the ribbon take-up reel drives the ribbon to move along a preset path, since the length of the printed text is small, part of the ribbon is wasted. To solve this problem, usually a second motor is also arranged on the ribbon pay-off reel. After printing a packaging bag is completed, the motor arranged on the ribbon pay-off reel is controlled to drive the ribbon to retreat a certain distance. However, in the printer of this embodiment, when the driving component 5 drives the movable frame 4 to move in the first direction from the inlet end of the conveying path towards the outlet end of the conveying path, since the movable frame 4 itself can drive the ribbon 100 to move a certain distance, the take-up reel motor 31 can stop working at this time, and only the movable frame 4 drives the ribbon 100 to move. After completing one printing, the driving component 5 drives the movable frame 4 to move in the first direction from the outlet end of the conveying path towards the inlet end of the conveying path, and at the same time the movable frame 4 drives the ribbon 100 to move in the opposite direction, that is, the retreat of the ribbon 100 relative to the print head is completed. At this time, by driving the ribbon 100 to continue to move the distance of the printed text length by the take-up reel motor 31, the next printing operation can be carried out. Therefore, the printer can realize the retreat of the ribbon 100 relative to the print head without arranging a motor on the ribbon pay-off reel 2, and avoid waste of the ribbon 100.

[0051] Continue to refer to Figures 1 - 4 , the driving component 5 includes a driving motor 51, a cam 52 arranged at the output end of the driving motor 51, and a connecting rod 53 rotatably connected to the cam 52. One end of the connecting rod 53 far from the cam 52 is rotatably connected to the movable frame 4. The position where the cam 52 and the connecting rod 53 are rotatably connected is arranged at an interval from the rotation center of the cam 52. The cam 52 is used to drive the printing device 6 to move. In this way, the movable frame 4 can be driven to reciprocate in the first direction through a crank-slider mechanism, and at the same time the printing device 6 is driven to move by the cam 52. In this way, a separate driving member for driving the printing device 6 to move does not need to be arranged, and the driving component 5 drives the movable frame 4 and the printing device 6 to move at the same time.

[0052] As an alternative solution, the printing device 6 can also be driven by a crank-slider mechanism, and the movable frame 4 can be driven to reciprocate in the first direction by a cam mechanism.

[0053] Continue to refer to Figures 1 - 4, the printing device 6 has an abutting block 61 and a print head 62 provided on the abutting block 61. The printing device 6 can move relative to the frame 1 and has a printing position and a non-printing position. When the printing device 6 is in the printing position, the print head 62 can print on the printing medium. When the printing device 6 is in the non-printing position, the print head 62 is separated from the ribbon 100, so that no printing operation is performed. The outer wall of the cam 52 has a working section 521 and a non-working section 522. The distance between the rotation center of the cam 52 and the working section 521 is greater than the distance between the rotation center of the cam 52 and the non-working section 522. When the movable frame 4 moves in the first direction from the inlet end of the conveying path towards the outlet end of the conveying path, the working section 521 can abut against the abutting block 61 to drive the print head 62 to move to the printing position. When the movable frame 4 moves in the first direction from the outlet end of the conveying path towards the inlet end of the conveying path, the non-working section 522 can abut against the abutting block 61 to keep the print head 62 always in the non-printing position.

[0054] Continue to refer to Figures 1 - 4 , the printer further includes an elastic member 63. The elastic member 63 is disposed between the print head 62 and the frame 1 and is used to provide an elastic force for the abutting block 61 to abut against the outer wall of the cam 52. Thus, after the driving assembly 5 drives the printing device 6 to move, the elastic member 63 drives the printing device 6 to reset.

[0055] Continue to refer to Figures 1 - 4 , the outer wall of the abutting block 61 is cylindrical, and the abutting block 61 is rotatably disposed on the cam 52, and the outer wall of the cam 52 is in rolling contact with the outer wall of the abutting block 61. With such a setting, the friction between the outer wall of the cam 52 and the outer wall of the abutting block 61 can be reduced.

[0056] Continue to refer to Figures 1 - 4 , the printer further includes a pay-off roller 21 disposed between the ribbon supply reel 2 and the movable frame 4. The pay-off roller 21 is used to convey the ribbon 100 wound around the ribbon supply reel 2 to the inlet end of the conveying path, so that during the reciprocating movement of the movable frame 4 in the first direction, the position of the inlet end of the conveying path relative to the frame body 43 remains unchanged. In addition, the printer further includes a take-up roller 32 disposed between the movable frame 4 and the ribbon take-up reel 3. The take-up roller 32 is used to convey the ribbon 100 at the outlet end of the conveying path to the ribbon take-up reel 3, so that during the reciprocating movement of the movable frame 4 in the first direction, the position of the outlet end of the conveying path relative to the frame body 43 remains unchanged.

[0057] Continue to refer to Figures 1 - 4, the frame 1 is provided with two slide rails 11 extending in the first direction. Both the two first rollers 41 and the two second rollers 42 are arranged on the frame body 43. The frame body 43 has two chutes, and the two slide rails 11 are respectively in sliding fit with the two chutes. The frame body 43 is installed on the frame 1 through the sliding fit between the chutes and the slide rails 11, and two groups of chutes and slide rails 11 are provided to make the connection between the frame body 43 and the frame 1 stable.

[0058] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Printer, characterized in that, Comprising: A frame (1); A ribbon unwinding reel (2) for unwinding a ribbon (100); A ribbon winding reel (3) for winding the ribbon (100), and a winding reel motor (31) for driving the movement of the ribbon (100) is provided on the ribbon winding reel (3); A movable frame (4) is slidably provided on the frame (1) in a first direction. The movable frame (4) includes two first rollers (41) spaced apart in the first direction and two second rollers (42) spaced apart in the first direction. The first rollers (41) and the second rollers (42) are spaced apart in a second direction, and the second direction forms an angle with the first direction. The movable frame (4) has a conveying path for conveying the ribbon (100). The conveying path is arranged around the two first rollers (41) and the two second rollers (42), and both the two first rollers (41) and the two second rollers (42) are located inside the conveying path. The inlet end and the outlet end of the conveying path are always located between the two first rollers (41), and the part of the conveying path located between the two first rollers (41) is parallel to the first direction; A driving assembly (5) for driving the movable frame (4) to reciprocally slide relative to the frame (1) in the first direction; A printing device (6) is movably arranged on the frame (1) and can drive the movement of the ribbon (100) located between the two second rollers (42) to print on a printing medium; The driving assembly (5) can drive the movable frame (4) to move in the first direction from the inlet end of the conveying path towards the outlet end of the conveying path, and at the same time drive the printing device (6) to move, so as to drive the movement of the ribbon (100) located between the two second rollers (42); The driving assembly (5) includes a driving motor (51), a cam (52) provided at the output end of the driving motor (51), and a connecting rod (53) rotatably connected to the cam (52). One end of the connecting rod (53) away from the cam (52) is rotatably connected to the movable frame (4). The position where the cam (52) and the connecting rod (53) are rotatably connected is spaced apart from the rotation center of the cam (52). The cam (52) is used to drive the movement of the printing device (6).

2. The printer according to claim 1, wherein The printing device (6) has an abutting block (61) and a print head (62) provided on the abutting block (61). The printing device (6) can move relative to the frame (1) and has a printing position and a non-printing position. When the printing device (6) is in the printing position, the print head (62) can print on the printing medium. When the printing device (6) is in the non-printing position, the print head (62) is separated from the ribbon (100). The outer wall of the cam (52) has a working section (521) and a non-working section (522). The distance between the rotation center of the cam (52) and the working section (521) is greater than the distance between the rotation center of the cam (52) and the non-working section (522). When the movable frame (4) moves in the first direction from the inlet end of the conveying path towards the outlet end of the conveying path, the working section (521) can abut against the abutting block (61) to drive the print head (62) to move to the printing position. When the movable frame (4) moves in the first direction from the outlet end of the conveying path towards the inlet end of the conveying path, the non-working section (522) can abut against the abutting block (61) to keep the print head (62) always in the non-printing position.

3. The printer according to claim 2, characterized in that, It further includes an elastic member (63). The elastic member (63) is provided between the print head (62) and the frame (1) and is used to provide an elastic force for making the abutting block (61) abut against the outer wall of the cam (52).

4. The printer according to claim 2, characterized in that, The outer wall of the abutting block (61) is cylindrical, and the abutting block (61) is rotatably provided on the cam (52), and the outer wall of the cam (52) is in rolling contact with the outer wall of the abutting block (61).

5. The printer according to any one of claims 1-4, characterized in that The printer further includes a pay-off roller (21) provided between the ribbon supply reel (2) and the movable frame (4). The pay-off roller (21) is used to convey the ribbon (100) wound around the ribbon supply reel (2) to the inlet end of the conveying path.

6. The printer according to any one of claims 1-4, characterized in that, The printer further includes a take-up roller (32) provided between the movable frame (4) and the ribbon take-up reel (3). The take-up roller (32) is used to convey the ribbon (100) located at the outlet end of the conveying path to the ribbon take-up reel (3).

7. The printer according to any one of claims 1 to 4, characterized in that The part of the conveying path between the first roller (41) and the second roller (42) is perpendicular to the first direction.

8. The printer according to any one of claims 1 to 4, characterized in that, The frame (1) is provided with two slide rails (11) extending in the first direction. The movable frame (4) includes a frame body (43). The two first rollers (41) and the two second rollers (42) are both provided on the frame body (43). The frame body (43) has two sliding grooves, and the two slide rails (11) are respectively in sliding fit with the two sliding grooves.

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