Printer head piece mounting structure convenient to assemble and disassemble and printer

Abstract

The utility model provides a printer head piece installation structure convenient to assemble and disassemble and a printer, which comprises a fixed frame consisting of an upper spring fixing plate and a lower printing head front cover, and an installation cavity and a paper feeding area are formed between the upper spring fixing plate and the lower printing head front cover. The printing head fixing plate is detachably arranged in the paper feeding area, and the bottom of the printing head fixing plate is provided with a limiting plate and an arc-shaped limiting hole matched with a printer rubber roller rotating shaft. The printing head module is detachably installed at the bottom of the fixing plate, and a paper feeding channel is defined by the printing head module and the rubber roller. The compression spring is located above the paper feeding area and used for compressing the paper feeding area on the rubber roller rotating shaft. According to the utility model, the disassembly and assembly process of the printing head sheet module is simplified, and the use convenience and the equipment reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printer head chip installation structure, in particular to a printer head chip installation structure and a printer which are convenient for loading and unloading. Background Art

[0002] In modern office and industrial environments, label printer modules are widely used in various fields such as item identification, asset management, and packaging marking due to their high efficiency and convenience. Among them, the print head assembly TPH, as the core component of the label printer, is responsible for converting electronic signals into actual print output, and its performance directly affects the printing quality and speed. However, during the production or maintenance stage, the removal and replacement of the print head assembly often becomes a challenge.

[0003] Most label printer modules on the market are complex in design, and usually require the removal of multiple parts or screws to access the print head assembly. This complex structure not only makes replacement troublesome and cumbersome, but also increases maintenance time and labor intensity. For enterprises, longer downtime and high labor costs will undoubtedly reduce overall operational efficiency and even affect business continuity.

[0004] In addition, frequent disassembly and assembly operations may cause unnecessary wear or damage to other internal components, thereby shortening the service life of the entire printer. For maintenance personnel, overly complicated disassembly and assembly processes also increase the difficulty of operation and the risk of failure caused by improper operation. Therefore, simplifying the disassembly and replacement process of the print head assembly and improving the convenience and efficiency of maintenance work have become one of the key issues that need to be solved in label printer design.

[0005] In view of this, the inventor specially designed a printer head chip installation structure and a printer that are easy to load and unload, and this case was thus created. Utility Model Content

[0006] In order to solve the above-mentioned problem of reducing the disassembly steps, improving the convenience of replacing the print head assembly, and ensuring the stability and durability of the equipment, one of the technical solutions of the utility model is as follows:

[0007] A printer head chip mounting structure and a printer that are easy to install and remove, comprising:

[0008] The fixed frame is composed of a spring fixing plate at the upper end and a print head front cover at the lower end, a mounting cavity is formed between the spring fixing plate and the print head front cover, a paper feeding area is formed in front of the mounting cavity, and a mounting hole communicating with the mounting cavity is formed through the upper end of the spring fixing plate;

[0009] The print head fixing plate is detachably provided in the paper feeding area. A pair of limiting plates are formed at the lower end thereof. An arc-shaped limiting hole for movably limiting the rotating shaft of the printer rubber roller is formed at the lower end of the limiting plate. A first limiting piece is provided at the front end of the print head fixing plate and a second limiting piece is provided at the rear end thereof;

[0010] The print head module is detachably provided at the lower end of the print head fixing plate. It encloses with the rubber roller between the two limiting grooves to form a paper feeding channel for outputting printed content;

[0011] The compression spring is provided above the paper feeding area. Its two ends are respectively in movable contact with the inner wall of the spring fixing plate and the upper end surface of the print head fixing plate, and is used to elastically press the print head fixing plate onto the rotating shaft of the rubber roller;

[0012] Wherein, a first limiting groove for cooperating with the first limiting piece is formed on one side of the spring fixing plate close to the paper feeding area. A second limiting groove for cooperating with the second limiting piece is formed on one side of the print head front cover close to the paper feeding area. The distance between the first limiting groove and the second limiting groove is configured to be greater than that of the print head module so that the print head module can move back and forth between the first limiting groove and the second limiting groove.

[0013] Preferably, the spring fixing plate includes a top plate and side plates vertically extending downward along both sides of the top plate. A rotating shaft edge is integrally extended at the rear side of the side plate. A hinge hole is formed through between the two rotating shaft edges along the same straight line. The installation hole is formed through the middle of the top plate.

[0014] Preferably, the first limiting groove is formed by a pair of "C"-shaped pieces provided on the front side of the top plate. The opening of the first limiting groove faces the rear side of the top plate. The first limiting piece is an "L"-shaped plate provided on the front side of the print head fixing plate and there are a pair of them. The end of the first limiting piece corresponds to the opening of the first limiting groove.

[0015] Preferably, the print head front cover includes side plates on both sides and a bottom plate connected between the two side plates and inclined. The top of the side plate is detachably connected to the bottom of the top plate so that an installation cavity with an open front side is enclosed between the side plate, the bottom plate and the top plate, and the opening is the paper feeding area.

[0016] Preferably, the second limiting groove is formed by the inward depression of the opening side of the print head front cover. The second limiting piece is provided at the rear side of the print head fixing plate and is opposite to the second limiting groove.

[0017] Preferably, the second limiting piece is a sheet-like structure protruding and extending from the rear side of the print head fixing plate towards both sides.

[0018] Preferably, a first limiting protrusion is formed on the lower end surface of the top plate and at the upper end of the paper feeding area, a second limiting protrusion corresponding to the first limiting protrusion is formed on the upper end surface of the print head fixing plate, and two ends of the pressing spring are respectively movably sleeved outside the first limiting protrusion and the second limiting protrusion.

[0019] Preferably, a pair of limiting wall surfaces are arranged on the front sides of the two side plates close to the paper feeding area and extend towards each other in a direction approaching each other, and the limiting plate is opposite to the limiting wall surfaces so that the print head fixing plate is movably limited between the two limiting wall surfaces.

[0020] Preferably, the limiting wall surface is integrally connected to the bottom end of the side plate through a horizontally extending connecting wall, and the limiting wall surface integrally extends towards the rear side of the print head fixing plate to form a limiting edge.

[0021] Preferably, it further includes a protective baffle, and the protective baffle includes a front baffle covering the front side of the first limiting groove, a horizontal baffle horizontally arranged at the upper end of the front baffle, and a lower baffle arranged at the bottom of the front baffle and extending obliquely backwards, and the front baffle is detachably fixed to the first limiting groove through a locking bolt.

[0022] The second technical solution of the present invention is as follows:

[0023] A printer includes a printer head sheet mounting structure.

[0024] The beneficial effects of the present invention are as follows:

[0025] In the present invention, by providing mounting holes on the spring fixing plate, it is convenient for the insertion of the print head fixing plate and the print head module thereon. The first limiting piece at the front end and the second limiting piece at the rear end of the print head fixing plate are respectively inserted into the first limiting groove of the spring fixing plate and the second limiting groove of the print head front cover to complete preliminary positioning. At this time, the print head fixing plate can still slide back and forth between the first limiting groove and the second limiting groove for adjustment. Subsequently, by matching the arc-shaped limiting hole at the lower end of the print head fixing plate with the rotating shaft of the printer rubber roller, secondary limiting of the print head fixing plate in the horizontal direction is achieved. Finally, a downward pressure is applied by the pressing spring at the top to complete the final fixing of the print head fixing plate in the vertical direction, ensuring its stability.

[0026] During reverse operation, by sequentially releasing the above fixing structures, the print head fixing plate and the print head module thereon can be easily disassembled, thus realizing the convenient installation and disassembly of the printer head sheet module.

[0027] Therefore, the present invention can complete the replacement of the print head assembly without disassembling a large number of screws or parts, reducing the maintenance time and labor intensity, reducing the downtime of the enterprise, and improving the overall operation efficiency.

[0028] In addition, through the design of structures such as the limiting plate, arc-shaped limiting holes, and compression springs, the stability and positioning accuracy of the print head assembly during use are ensured, and at the same time, wear of internal components caused by frequent disassembly and assembly is avoided.

[0029] In addition, the reasonable structural design reduces unnecessary mechanical stress, which helps to extend the overall service life of the printer.

[0030] In particular, the design of the compression spring allows the print head fixing plate to have a certain elastic space, and the print head module can be elastically pressed against the upper end of the rubber roller.

[0031] In addition, the design of the protective baffle not only protects the internal components from the external environment, but also prevents accidental injuries to the operator during the disassembly and assembly process.

[0032] In summary, through the ingenious design, the utility model realizes the quick disassembly and installation of the printer head piece module, greatly facilitating the user experience, and improving the reliability and economy of the equipment to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0034] Among them:

[0035] Figure 1 is the overall structural schematic diagram of the present utility model;

[0036] Figure 2 is the exploded structural schematic diagram of the present utility model;

[0037] Figure 3 is the sectional structural schematic diagram of the present utility model;

[0038] Figure 4 is the three-dimensional structural schematic diagram of the print head fixing plate in the present utility model;

[0039] Figure 5 is the structural schematic diagram of the present utility model in the use state;

[0040] Figure 6 is the installation process schematic diagram of the print head fixing plate in the present utility model;

[0041] Figure 7 is the partial sectional structural schematic diagram highlighting the use state of the present utility model.

[0042] Label Description:

[0043] 10. Fixed frame; 11. First limiting groove; 12. Second limiting groove; 13. Spring fixing plate; 131. Top plate; 132. Side plate; 133. First limiting protrusion; 14. Print head front cover; 141. Side plate; 142. Bottom plate; 143. Mounting sleeve; 144. Inner plate; 15. Mounting hole; 16. Rotating shaft side; 161. Hinge hole; 17. Installation cavity; 18. Paper feeding area; 19. Limiting wall surface; 191. Limiting edge; 20. Print head fixing plate; 21. Limiting plate; 211. Arc-shaped limiting hole; 22. First limiting piece; 221. Vertical plate; 222. Horizontal plate; 23. Second limiting piece; 24. Second limiting protrusion; 30. Print head module; 40. Compression spring; 50. Protection baffle; 51. Front baffle; 52. Horizontal baffle; 53. Lower baffle. Detailed implementation manners

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0045] Please refer to Figures 1 to 7 , which is a printer head sheet mounting structure and a printer that are easy to load and unload as the best embodiment of the present utility model, including:

[0046] The fixed frame 10 is composed of a spring fixing plate 13 at the upper end and a print head front cover 14 at the lower end. An installation cavity 17 is formed between the spring fixing plate 13 and the print head front cover 14. A paper feeding area 18 is formed at the front side of the installation cavity 17. An installation hole 15 communicating with the installation cavity 17 is formed through the upper end of the spring fixing plate 13. In this embodiment, the installation hole 15 is square.

[0047] The print head fixing plate 20 is detachably arranged in the paper feeding area 18. A pair of limiting plates 21 are formed at the lower end thereof. Arc-shaped limiting holes 211 for movably limiting the rotating shaft of the printer rubber roller are formed at the lower ends of the limiting plates 21. A first limiting piece 22 is arranged at the front end of the print head fixing plate 20 and a second limiting piece 23 is arranged at the rear end thereof.

[0048] The print head module 30 is detachably arranged at the lower end of the print head fixing plate 20 and encloses a paper feeding channel with the rubber roller between the two limiting grooves for outputting printed content.

[0049] The compression spring 40 is arranged above the paper feeding area 18. The two ends thereof are respectively in movable contact with the inner wall of the spring fixing plate 13 and the upper end surface of the print head fixing plate 20, and are used for elastically pressing the print head fixing plate 20 onto the rotating shaft of the rubber roller (in combination with Figure 7 ).

[0050] Among them, on one side of the spring fixing plate 13 close to the paper feeding area 18, a first limiting groove 11 is formed to cooperate with the first limiting piece 22. On one side of the print head front cover 14 close to the paper feeding area 18, a second limiting groove 12 is formed to cooperate with the second limiting piece 23. The distance between the first limiting groove 11 and the second limiting groove 12 is configured to be greater than the print head module 30 so that the print head module 30 can move back and forth between the first limiting groove 11 and the second limiting groove 12.

[0051] Specifically, as Figure 2 shown, the spring fixing plate 13 includes a top plate 131 and side plates 132 vertically extending downward along both sides of the top plate 131. A rotating shaft edge 16 extends integrally at the rear side of the side plate 132. An articulated hole 161 is formed through between the two rotating shaft edges 16 along the same straight line. The mounting hole 15 is formed through the middle of the top plate 131.

[0052] Thus, through the rotating shaft edge 16 and the articulated hole 161, it is convenient to install and articulate the fixed frame 10 in the printer, so as to conveniently control the contact state between the print head module and the rubber roller.

[0053] Preferably, as Figure 2 、 3 shown, the first limiting groove 11 is constituted by a pair of "C"-shaped pieces arranged on the front side of the top plate 131. The opening of the first limiting groove 11 faces the rear side of the top plate 131. The first limiting piece 22 is an "L"-shaped plate arranged on the front side of the print head fixing plate 20 and there are a pair of them. The end of the first limiting piece 22 corresponds to the opening of the first limiting groove 11.

[0054] In this embodiment, the first limiting piece 22 includes a vertical plate 221 integrally extending vertically upward along the front side of the print head fixing plate 20 and a horizontal plate 222 extending horizontally outward along the vertical plate 221. The horizontal plate 222 is opposite to the position of the first limiting groove 11, so that when installing the print head module, it can be first placed into the first limiting groove 11 to form a preliminary limit on the front end of the print head fixing plate 20.

[0055] Preferably, as Figure 2 、 3 shown, the print head front cover 14 includes side plates 141 on both sides and a bottom plate 142 connected between the two side plates 141 and inclined. The top of the side plate 141 is detachably connected to the bottom of the top plate 131 so that an installation cavity 17 with an open front side is formed among the side plate 141, the bottom plate 142 and the top plate 131, and the opening is the paper feeding area 18.

[0056] In this embodiment, an installation screw sleeve 143 is provided at the top of the inner side wall of the side plate 141, and an installation screw hole (not marked in the figure) corresponding to the installation screw sleeve 143 is formed on the top plate 131. Thus, the spring fixing plate 13 and the print head front cover 14 are locked and fixed by a locking bolt, forming an installation cavity 17 inside and a paper feeding area 18 in the front side area of the installation cavity 17.

[0057] Specifically, as Figure 2 、 3 shown, the second limiting groove 12 is formed by inward depression on the opening side of the print head front cover 14, and the second limiting piece 23 is arranged at the rear side of the print head fixing plate 20 and is opposite to the second limiting groove 12.

[0058] In this embodiment, two inner plates 144 parallel to the side plates 141 are additionally provided on the upper end surface of the bottom plate 142. The second limiting groove 12 is formed by inward depression on the side of the inner plate 144 close to the opening. The vertical height of the second limiting groove 12 is lower than that of the first limiting groove 11. The second limiting piece 23 is a sheet-like structure extending outward from the rear side of the print head fixing plate 20 toward both sides. Thus, after the first limiting piece 22 is placed into the first limiting groove 11, the second limiting piece 23 is placed at a height opposite to the second limiting groove 12. Then, the print head fixing plate 20 is pushed backward, so that the second limiting piece 23 is placed into the second limiting groove 12 to complete the limitation of the rear end of the print head fixing plate 20. Subsequently, the pressing spring 40 is installed and the print head fixing plate 20 is pressed down. At this time, the first limiting piece 22 and the second limiting piece 23 are respectively pressed against the bottom surfaces of the first limiting groove 11 and the second limiting groove 12. Finally, by rotating the spring fixing plate 13 around its hinge axis, the arc-shaped limiting holes 211 at the lower end of the print head fixing plate 20 are engaged with the rotating shafts at both ends of the rubber roller to complete the final limitation, realizing the limitation of the print head module 30 in the up-down direction and the left-right direction.

[0059] Preferably, as Figure 2 、 3 、4 shown, a first limiting protrusion 133 is formed on the lower end surface of the top plate 131 and at the upper end of the paper feeding area 18, and a second limiting protrusion 24 corresponding to the first limiting protrusion 133 is formed on the upper end surface of the print head fixing plate 20. Both ends of the pressing spring 40 are respectively movably sleeved outside the first limiting protrusion 133 and the second limiting protrusion 24.

[0060] Thus, through the first limiting protrusion 133 and the second limiting protrusion 24, the upper and lower ends of the pressing spring 40 can be limited, so that the elastic force direction always remains perpendicular to the print head fixing plate 20, thereby keeping the print head fixing plate 20 and the print head module 30 in a state of being stably pressed on the rubber roller.

[0061] Preferably, as Figure 2 、 5As shown in FIGS. 7, a pair of limiting wall surfaces 19 are arranged on the front sides of the two side plates 132 close to the paper feeding area 18 and extend towards each other in a direction close to each other. The limiting plate 21 is opposite to the limiting wall surface 19 in position so that the print head fixing plate 20 is movably limited between the two limiting wall surfaces 19. The limiting wall surface 19 is integrally connected to the bottom end of the side plate 132 through a horizontally extending connecting wall, and a limiting edge 191 is integrally extended towards the rear side of the print head fixing plate 20 on the limiting wall surface 19.

[0062] Thus, through the two limiting wall surfaces 19, the two sides of the print head fixing plate 20 can be further limited, so that it is stably located in the installation cavity 17 and its stability during the working process is maintained. In addition, through the limiting edge 191, the protection area of the print head fixing plate 20 can be further enlarged, and the stability of the print head fixing plate 20 during installation and use is further enhanced.

[0063] Preferably, as Figure 5 shown, a protection baffle 50 is further included. The protection baffle 50 includes a front baffle 51 covering the front side of the first limiting groove 11, a horizontal baffle 52 horizontally arranged at the upper end of the front baffle 51, and a lower baffle 53 arranged at the bottom of the front baffle 51 and extending obliquely backward. The front baffle 51 is detachably fixed to the first limiting groove 11 through a locking bolt.

[0064] This embodiment further includes:

[0065] A printer, including the aforementioned printer head sheet mounting structure.

[0066] The working mechanism and beneficial effects of the present utility model are as follows:

[0067] Working mechanism:

[0068] As Figure 6 、 7 shown, the print head module 30 is locked to the print head fixing plate 20, passes through the large square hole (i.e., the mounting hole 15) on the spring fixing plate 13 from the rear, and is fixed inside the TPH (print head assembly). The front of the print head abuts against the first limiting groove 11 on the spring fixing plate 13, and the rear is clamped into the second limiting groove 12 on the print head front cover 14. The pressing spring 40 applies a downward force to keep the print head fixing plate 20 in contact with the spring fixing plate 13, thereby ensuring the stable positioning of the print head in the TPH group and preventing it from moving randomly. In addition, the print head fixing plate 20 is designed with an arc structure (i.e., the arc-shaped limiting hole 211), which can be clamped into the bushing of the rubber roller in the working state to prevent its displacement in the left and right directions. Such a design not only ensures that the print head sheet module can be easily disassembled and assembled when needed, but also ensures that there will be no abnormal functions after assembly. Beneficial effects

[0069] The utility model facilitates the insertion of the print head fixing plate 20 and the print head module 30 thereon by providing mounting holes 15 on the spring fixing plate 13. The first limiting piece 22 at the front end and the second limiting piece 23 at the rear end of the print head fixing plate 20 are respectively inserted into the first limiting groove 11 of the spring fixing plate 13 and the second limiting groove 12 of the print head front cover 14 to complete the preliminary positioning. At this time, the print head fixing plate 20 can still slide back and forth between the first limiting groove 11 and the second limiting groove 12 for adjustment. Subsequently, by mating the arc-shaped limiting hole 211 at the lower end of the print head fixing plate 20 with the rotating shaft of the printer rubber roller, secondary limiting of the print head fixing plate 20 in the horizontal direction is achieved. Finally, a downward pressure is applied by the pressing spring 40 at the top to complete the final fixing of the print head fixing plate 20 in the vertical direction, ensuring its stability without movement.

[0070] During reverse operation, by successively releasing the above fixing structures, the print head fixing plate 20 and the print head module 30 thereon can be easily disassembled, thus realizing the convenient installation and disassembly of the print head module.

[0071] Therefore, the utility model can replace the print head assembly without disassembling a large number of screws or parts, reducing the maintenance time and labor intensity, minimizing the downtime of the enterprise, and improving the overall operation efficiency.

[0072] In addition, through the design of structures such as the limiting plate 21, the arc-shaped limiting hole 211, and the pressing spring 40, the stability and positioning accuracy of the print head assembly during use are ensured, while internal component wear caused by frequent disassembly and assembly is avoided.

[0073] In addition, the reasonable structural design reduces unnecessary mechanical stress, contributing to the extension of the overall service life of the printer.

[0074] Particularly, the design of the pressing spring 40 allows a certain elastic space for the print head fixing plate 20, enabling the print head module 30 to be elastically pressed against the upper end of the rubber roller.

[0075] In addition, the design of the protective baffle 50 not only protects the internal components from the external environment but also prevents accidental injuries to the operator during the disassembly and assembly process.

[0076] In summary, the utility model realizes the rapid disassembly and installation of the printer head module through ingenious design, greatly facilitating the user experience and to a certain extent enhancing the reliability and economy of the device.

[0077] The present utility model has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above-mentioned manner. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model, or the concept and technical solution of the present utility model are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A printer head sheet mounting structure that is convenient for loading and unloading, characterized in that, include: A fixed frame (10) is composed of a spring fixing plate (13) located at the upper end and a print head front cover (14) located at the lower end, a mounting cavity (17) is formed between the spring fixing plate (13) and the print head front cover (14), a paper feeding area (18) is formed at the front side of the mounting cavity (17), and a mounting hole (15) communicating with the mounting cavity (17) is formed through the upper end of the spring fixing plate (13); A print head fixing plate (20) is detachably arranged in the paper feeding area (18), and a pair of limiting plates (21) are formed at its lower end, wherein the lower end of the limiting plate (21) forms an arc-shaped limiting hole (211) for movable limiting with the rotating shaft of the printer rubber roller, and the front end of the print head fixing plate (20) is provided with a first limiting plate (22) and the rear end thereof is provided with a second limiting plate (23); A print head module (30) is detachably arranged at the lower end of the print head fixing plate (20) and is combined with the rubber roller between the two limit plates (21) to form a paper feeding channel for outputting printed content; A compression spring (40) is arranged on the upper side of the paper feeding area (18), with two ends of the compression spring movably contacting the inner wall of the spring fixing plate (13) and the upper end surface of the print head fixing plate (20) respectively, and is used to elastically press the print head fixing plate (20) onto the rotating shaft of the rubber roller; The spring fixing plate (13) has a first limiting groove (11) formed on a side close to the paper feeding area (18) and matched with the first limiting plate (22); the print head front cover (14) has a second limiting groove (12) formed on a side close to the paper feeding area (18) and matched with the second limiting plate (23); the spacing between the first limiting groove (11) and the second limiting groove (12) is constructed to be larger than the print head module (30) so that the print head module (30) can move forward and backward between the first limiting groove (11) and the second limiting groove (12).

2. The installation structure of a printer head sheet that is convenient for loading and unloading according to claim 1, characterized in that, The spring fixing plate (13) comprises a top plate (131) and side plates (132) extending vertically downward along both sides of the top plate (131); a rotating shaft edge (16) is integrally extended from the rear side of the side plate (132); a hinge hole (161) is formed by penetrating between the two rotating shaft edges (16) along the same straight line; and the mounting hole (15) is opened through the middle of the top plate (131).

3. The installation structure of a printer head sheet that is convenient for loading and unloading according to claim 2, wherein, The first limiting groove (11) is formed by a pair of "匚"-shaped pieces arranged on the front side of the top plate (131), the opening of the first limiting groove (11) faces the rear side of the top plate (131), the first limiting piece (22) is an "L"-shaped plate arranged on the front side of the print head fixing plate (20), and a pair of the first limiting pieces (22) are provided, and the end of the first limiting piece (22) corresponds to the opening of the first limiting groove (11).

4. The installation structure of a printer head sheet that is convenient for loading and unloading according to claim 2, characterized in that, The print head front cover (14) comprises side panels (141) located on both sides and a bottom panel (142) connected between the two side panels (141) and in an inclined shape, wherein the top of the side panel (141) is detachably connected to the bottom of the top panel (131) so that the side panels (141), the bottom panel (142) and the top panel (131) enclose the mounting cavity (17) with a front opening, and the opening is the paper feeding area (18).

5. The installation structure of a printer head sheet that is convenient for loading and unloading according to claim 4, wherein, The second limiting groove (12) is formed by inward depression on the opening side of the print head front cover (14), and the second limiting piece (23) is arranged on the rear side of the print head fixing plate (20) and opposite to the second limiting groove (12).

6. The installation structure of a printer head sheet that is convenient for loading and unloading according to claim 5, wherein, The second limiting piece (23) is a sheet-like structure formed by protruding and extending from the rear side of the print head fixing plate (20) toward both sides.

7. The installation structure of a printer head sheet that is convenient for loading and unloading according to claim 2, characterized in that, A first limiting protrusion (133) is formed on the lower end surface of the top plate (131) and at the upper end of the paper feeding area (18), a second limiting protrusion (24) corresponding to the first limiting protrusion (133) is formed on the upper end surface of the print head fixing plate (20), and two ends of the pressing spring (40) are respectively movably sleeved outside the first limiting protrusion (133) and the second limiting protrusion (24).

8. The installation structure of a printer head sheet that is convenient for loading and unloading according to claim 2, wherein, On the front sides of the two side plates (132) close to the paper feeding area (18), a pair of limiting wall surfaces (19) are arranged to extend toward each other in a direction close to each other, and the limiting plate (21) is opposite to the limiting wall surfaces (19) so that the print head fixing plate (20) is movably limited between the two limiting wall surfaces (19).

9. The mounting structure of a printer head sheet that is convenient for loading and unloading according to claim 8, characterized in that, The limiting wall surface (19) is integrally connected to the bottom end of the side plate (132) through a horizontally extending connecting wall, and the limiting wall surface (19) integrally extends toward the rear side of the print head fixing plate (20) to form a limiting edge (191).

10. A printer, characterized in that, It includes the printer head sheet mounting structure as described in claim 1.

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