CN112848692A

CN112848692A - Thermal printer core

Info

Publication number: CN112848692A
Application number: CN202110259333.6A
Authority: CN
Inventors: 蒋文柏; 林超艺; 王生辉
Original assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Current assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2021-05-28

Abstract

The utility model provides a thermal printer core, includes bed frame, mounting bracket, beats printer head, moves sword and rubber roll subassembly, and aforesaid beats printer head and locates on the bed frame, and this mounting bracket is located on aforesaid bed frame through shirking the mechanism, and aforesaid moves the sword and can locate on the bed frame movably and at least one end has a rack portion, its characterized in that shirk the mechanism and include pivot, handle, reset piece and axostylus axostyle, the bed frame on be equipped with the slider that can drive output gear revolve elastically. The stressed slide block moves to push the output gear to rotate, and finally the movable knife returns. Even if the situation that the cutter is jammed, the existence of the sliding block can still smoothly complete the return of the driving movable cutter.

Description

Thermal printer core

Technical Field

The invention relates to a printing device, in particular to a thermal printer core.

Background

The existing Thermal printer generally comprises a base frame, a motor, a transmission gear assembly, a printing Head assembly and a rubber roll which can be rotatably arranged on the base frame, a power input end of the transmission gear assembly is meshed with a driving output gear of the motor, a power output end of the transmission gear assembly is meshed with the rubber roll which is arranged at the end part of the rubber roll, the rubber roll is used for driving printing paper to move, a paper feeding channel is arranged between the rubber roll and the printing Head assembly, the printing Head assembly generally comprises a printing Head (TPH for short, Thermal Print Head), a printing Head support, a pressure spring and a pressure spring support frame, the printing Head is arranged on the printing Head support, two ends of the base frame are arranged at two ends of the pressure spring support frame, two ends of. When the printing paper is loaded or corrected, the printing paper is generally loaded or corrected by disassembling the rubber roller, two bearings are generally arranged at two ends of the rubber roller, a groove for arranging the bearings is formed in the base frame, the groove is semicircular, and the bearings are always positioned in the groove in a working state; when paper needs to be fed, the rubber roller communicating bearing can be easily separated from the groove. But has the following disadvantages: the bearing has larger range of play in the groove, which influences the normal operation of the rubber roller.

Therefore, an improved structure is disclosed in the prior art, and the improved structure refers to the chinese utility model patent with patent number ZL200520130017.5, namely miniature heat medium printer movement (with the number of grant publication being CN2725292Y), wherein a door opening pressing sheet and a return elastic sheet are additionally arranged in the improved structure, and the pressure of the return elastic sheet acts on the door opening pressing sheet, so as to ensure that the rubber roller is stably positioned in the positioning groove. The door opening pressing piece is an unconventional part, so that the process difficulty is improved, and the manufacturing cost is increased.

On this basis, the applicant has developed a novel rubber roll detachable construction, see chinese utility model patent's that patent number is ZL201120357824.6 bed frame and rubber roll assembly structure and applied the thermal printer that has this assembly structure (the grant bulletin number is CN202271666U), the bearing in this patent is located in the recess of bed frame through the jump ring of a special shape system for the assembly of rubber roll is shirked easily swiftly, and simultaneously, in the use, the bearing can not take place the drunkenness by the effect of the spacing portion of elasticity almost, guarantees the normal stable operation of rubber roll.

As a further improvement, the applicant also applies for a thermal printer, see patent No. ZL201710535432.6, chinese patent invention thermal printer (No. CN107310276B), in which when printing paper is loaded or needs to be corrected, the mounting frame springs away from the base frame by slightly pulling the wrench, and the first swing part and the second swing part will instantaneously act on the stationary knife, so that the stationary knife sinks vertically, the positive contact pressure between the cutting edge of the moving knife and the cutting edge of the stationary knife is reduced, the resistance of the return of the moving knife is relieved, and the moving knife returns smoothly. However, in the actual use situation, when the paper which is cut continuously is jammed between the contact surfaces of the movable blade and the fixed blade (generally called as a paper jam), the sinking abdication of the fixed blade is difficult to reduce the resistance of the paper jam to the return of the movable blade, so that the movable blade cannot be retracted and the function is disabled.

Disclosure of Invention

The invention aims to solve the technical problem of providing a thermal printer core which can still quickly return a movable knife after a paper jam.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a thermal printer core, includes bed frame, mounting bracket, beats printer head, moves sword and rubber roll subassembly, and aforesaid beats printer head and locates on the bed frame, and aforesaid rubber roll subassembly can be located on the mounting bracket with rotating through the rubber roll axle, and this mounting bracket is located on aforesaid bed frame through shirking the mechanism, and aforesaid moves the sword and can locate movably on the bed frame and at least one end has a rack portion, and aforesaid bed frame one side is equipped with transmission gear group, the output gear of this transmission gear group with move the rack portion meshing of sword one side, its characterized in that shirk the mechanism and include:

a rotating shaft which is rotatably arranged on the base frame in a direction parallel to the length direction of the printing head; a first swing rod and a second swing rod which can rotate along with the rotating shaft are respectively arranged at two ends of the first swing rod, a first gear tooth is formed at one side of the first swing rod, and a first driving part is arranged at one end of the first swing rod;

the handle is rotatably arranged on the base frame, second gear teeth which are meshed with the first gear teeth for transmission are formed on the inner side of the handle, and the outer end of the handle extends outwards to form a pulling part;

the reset piece is arranged on the base frame and always forces the rotating shaft to keep an initial state; and

the shaft lever is arranged on the mounting rack and is parallel to the rubber roll shaft;

grooves for the shaft lever to be arranged are respectively formed in two sides of the base frame, and the first swing rod and the second swing rod are respectively arranged close to the grooves; the base frame is elastically provided with a slide block which can drive the output gear to rotate,

when the mounting frame is arranged on the base frame, the rubber roller of the rubber roller assembly is close to the printing head, and the shaft lever is arranged in the groove;

the application of force is under the portion state of pulling, and the first teeth of a cogwheel of second teeth of a cogwheel drive, and first pendulum rod rotates to make the pivot rotate, and then the second pendulum rod rotates, and first pendulum rod and second pendulum rod drive the axostylus axostyle simultaneously, force the axostylus axostyle to break away from the recess, and the mounting bracket breaks away from the bed frame, and simultaneously, the first drive division drive slider of first pendulum rod removes, and the slider acts on output gear, and output gear rotates and drives and move the sword return.

In order to enable the shaft lever to smoothly drive the rubber roller to be separated from the base frame, the shaft lever is provided with a rubber roller support, two ends of the rubber roller support extend upwards to be provided with supporting parts, and the rubber roller assembly can be rotatably arranged on the supporting parts.

Further, a strip-shaped groove is formed in the base frame, the sliding block is elastically arranged in the strip-shaped groove through a return spring, the bottom end and the top end of the sliding block are respectively provided with a first abutting portion and a second abutting portion, the first abutting portion is close to the first swing rod, the second abutting portion is close to the output gear, the first swing rod can drive the first abutting portion after rotating, and then the second abutting portion of the sliding block drives the output gear.

Further, the transmission gear set comprises a driving gear, an intermediate gear and an output gear, the intermediate gear is a duplicate gear, two ends of the intermediate gear are respectively meshed with the driving gear and the output gear, the intermediate gear can be rotatably arranged on a supporting shaft of a gear support, the gear support is arranged on the base frame and can rotate around a fulcrum, and the first swing rod drives the gear support to rotate and enables the intermediate gear to be separated from the driving gear in a pressing state of the pulling part.

The output gear is rotatably arranged on the fulcrum shaft of the base frame, correspondingly, the gear bracket is provided with a shaft hole for the fulcrum shaft to penetrate through, the gear bracket can rotate by taking the shaft hole as a central fulcrum, the lower end of the gear bracket is provided with a stress part, and correspondingly, the first swing rod is provided with a second driving part which is matched with the stress part to drive the gear bracket to rotate. After the first swing rod rotates, the gear bracket can be driven to drive the intermediate gear to be separated from the driving gear, power transmission of the movable knife is cut off, smoothness of pushing the movable knife to return is guaranteed, and safety of operators can be guaranteed.

In order to ensure that the sliding block can move orderly, the gear bracket is provided with a limiting part for limiting the transverse movement of the sliding block.

Furthermore, the base frame is provided with a limit groove for the rubber roller component to be arranged.

In order to enable the movable knife to move stably, the two ends of the movable knife are respectively provided with a rack part, and correspondingly, the output gear is provided with an auxiliary gear through a connecting shaft and can rotate synchronously.

Furthermore, a prying part extends outwards from the first swing rod; the first swing rod can drive the second swing rod through the rotating shaft and can synchronously rotate, and the prying part and the second swing rod can simultaneously act on the driving shaft lever in the pressing state of the wrench.

The width of the gear teeth of the output gear is sequentially increased or decreased along the annular periphery of the output gear, and correspondingly, the sliding block is provided with an inclined part which is in contact fit with the gear teeth of the output gear. The design can guarantee that the sliding block can be reset smoothly without influencing the normal rotation of the output gear.

Compared with the prior art, the invention has the advantages that: the wrench is pressed down, the wrench drives the first swing rod to rotate, the first swing rod pushes the sliding block to move, the sliding block pushes the output gear to rotate after moving, the output gear rotates to further push the rack portion to move backwards, and the rack portion is a part of the movable knife, so that the movable knife finally returns. Even if meet the condition of cutter card paper, the existence of slider can accomplish the drive smoothly and move the sword return, stops to move the sword and can not roll back, and the condition that the function became invalid takes place.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment.

Fig. 2 is a state view after the base frame portion and the mount frame portion are detached.

Fig. 3 is an assembly view of the portion of the mounting bracket of fig. 2 from another perspective.

Fig. 4 is an exploded view of fig. 3.

Fig. 5 is an exploded view of the base portion of fig. 3.

Fig. 6 is a cross-sectional view of a base frame portion.

Fig. 7 is an enlarged view of the first swing link.

Fig. 8 is an enlarged view of the slider.

Fig. 9 is an enlarged view of the output gear.

Fig. 10 is a schematic structural view of the main body frame.

Fig. 11 is an enlarged view of the wrench.

Fig. 12 is an enlarged view of the gear holder.

Fig. 13 is a combination view of the moving blade, the output gear, the gear holder, and the like.

Fig. 14 is a schematic view of another perspective structure of fig. 13.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1, 2, and 3, the thermal printer movement in the present embodiment includes a base frame portion and a mount frame portion, and as shown in fig. 3 and 4, the mount frame portion includes a mount frame, a rubber roller assembly, a shaft, and a rubber roller holder. The shaft rod 15b, the glue roller assembly 12b is rotatably arranged on the mounting frame 11b through the glue roller shaft 122b, and the shaft rod 15b is arranged on the mounting frame 11b and is parallel to the glue roller shaft 122 b; the shaft lever 15b is provided with a rubber roller bracket 13b, two ends of the rubber roller bracket 13b extend upwards to be provided with supporting parts 14b, and the rubber roller assembly 12b is rotatably arranged on the supporting parts 14 b.

As shown in fig. 5 and 6, the base frame mainly includes a base frame 1, a handle 3, a print head 2, a movable blade 7, and a transmission gear set 5. The print head 2 is provided on the base frame 1. The base frame 1 in this embodiment is assembled by a main body frame 11, a cover plate 12 and a top plate 13.

The movable knife 7 can be movably arranged on the base frame 1, one end of the movable knife 7 is provided with a rack portion 71, one side of the base frame 1 is provided with the transmission gear set 5, as shown in fig. 5 and 6, the transmission gear set 5 in the embodiment comprises the transmission gear set 5 and a driving gear 51, a middle gear 52 and an output gear 53, the middle gear 52 is a duplicate gear, two ends of the middle gear are respectively meshed with the driving gear 51 and the output gear 53, and the output gear 53 is meshed with the rack portion 71 on one side of the movable knife 7. The drive gear 51 is here driven by an electric motor (not shown). The movable blade 7 has rack portions 71 at both ends thereof, and correspondingly, the output gear 53 is provided with an auxiliary gear 53a through a connecting shaft 531 and can be rotated synchronously. The auxiliary gear 53a is also in meshing transmission with one of the rack portions 71.

As shown in fig. 13 and 14, the rotation shaft 41c is rotatably provided on the base frame 1 in parallel with the longitudinal direction of the print head 2; a first swing link 4 and a second swing link 4c which can rotate along with the rotating shaft 41c are respectively arranged at two ends of the first swing link 4, a first gear tooth 41 is formed at one side of the first swing link 4, a first driving part 43 and a second driving part 44 are arranged at one end of the first swing link 4, and a prying part 42 extends outwards from the first swing link 4.

Referring to fig. 11, the handle 3 is rotatably disposed on the base frame 1, and an outer end of the second gear 31 engaged with the first gear 41 is formed on an inner side of the handle to extend outward to form a pulling portion 32.

As shown in fig. 5, the reset member 9 is disposed on the base frame 1 and always forces the rotating shaft 41c to maintain an initial state, and the reset member in this embodiment is a torsion spring.

As shown in fig. 5 and 6, the base frame 1 has grooves 15 for the shaft rod 15b to be disposed on two sides, and the base frame 1 has a limiting groove 16 for the rubber roller assembly 12b to be disposed on. The first swing link 4 and the second swing link 4c are respectively arranged close to the groove 15; referring to fig. 13 and 14, the base frame 1 is elastically provided with a slider 6 capable of driving the output gear 53 to rotate. Specifically, as shown in fig. 10, in the present embodiment, a strip-shaped groove 111 is formed on the main body frame 11, and the slider 6 is elastically disposed in the strip-shaped groove 111 through the return spring 63.

As shown in fig. 8, the bottom end and the top end of the slider 6 are respectively provided with a first abutting portion 61 and a second abutting portion 62, the first abutting portion 61 is disposed near the first swing link 4, the second abutting portion 62 is disposed near the output gear 53, the slider 6 is provided with a positioning portion 64 for the return spring 63 to be disposed, the first swing link 4 can drive the first abutting portion 61 after rotating, and then the second abutting portion 62 of the slider 6 drives the output gear 53.

As shown in fig. 8 and 9 in conjunction, the width of the teeth of the output gear 53 increases or decreases sequentially along the annular outer periphery of the output gear, and in the drawing, the

teeth

531, 532, and 533 decrease sequentially. The slider 6 has an inclined portion 63 which is in contact engagement with the teeth of the output gear 53. The inclined part 63 can avoid gear teeth by matching with the gear teeth of the output gear 53, and the design can ensure that the normal rotation of the output gear 53 is not influenced while the sliding block can be reset smoothly.

As shown in fig. 5, the intermediate gear 52 is rotatably provided on a support shaft 81 of the gear bracket 8, as shown in fig. 13, the gear bracket 8 is provided on the base frame 1 to be rotatable about a fulcrum, and the gear bracket 8 has a stopper portion 83 for restricting the lateral movement of the slider 6. When the trigger 32 is pressed, the first swing link 4 drives the gear holder 8 to rotate, and the intermediate gear 52 is disengaged from the driving gear 51.

As shown in fig. 5 and 12, the output gear 53 is rotatably provided on the support shaft 14 of the base frame, and correspondingly, the gear bracket 8 has a shaft hole 82 through which the support shaft 14 passes, and the shaft hole 62 is rotatably provided on one side boss 112 of the base frame 1. The gear bracket 8 can rotate around the shaft hole 82 as a central fulcrum, the lower end of the gear bracket 8 is provided with a force receiving part 84, and correspondingly, the first swing link 4 is provided with a second driving part 44 (see fig. 7) which is matched with the force receiving part 84 to drive the gear bracket 8 to rotate.

The mounting frame 11b is arranged in the state of the base frame 1, the rubber roller 121b of the rubber roller assembly 12b is close to the printing head 2 and is positioned in the limiting groove 16, and the shaft rod 15b is arranged in the groove 15.

When the force is applied to the wrenching part 32, the second gear 31 drives the first gear 41, the first swing rod 4 rotates, so that the rotating shaft 41c rotates, the second swing rod 4c rotates, the prying part of the first swing rod 4 and the second swing rod 4c simultaneously drive the shaft rod 15b, the shaft rod 15b is forced to be separated from the groove 15, the mounting frame 11b is separated from the base frame 1, meanwhile, the first driving part 43 of the first swing rod 4 drives the sliding block 6 to move, the sliding block 6 acts on the output gear 53, and the output gear 53 rotates and drives the movable knife 7 to return; meanwhile, the second driving portion 44 of the first swing link 4 acts on the stressed portion 84 of the gear bracket 8, so that the gear bracket 8 rotates around the shaft hole 82, the intermediate gear 52 is driven to disengage from the driving gear, and the transmission of the moving blade is cut off. After the external force is removed, the slider 6 returns to the initial position under the force of the return spring 63.

Claims

1. The utility model provides a thermal printer core, including bed frame (1), mounting bracket (11b), beat printer head (2), move cutter (7) and rubber roll subassembly (12b), aforesaid is beaten printer head (2) and is located on bed frame (1), aforesaid rubber roll subassembly (12b) can be located on mounting bracket (11b) through rubber roll axle (122b) with rotating, this mounting bracket (11b) is located on aforesaid bed frame (1) through shirking the mechanism, aforesaid moves cutter (7) and can locate on bed frame (1) with moving movably and at least one end has rack portion (71), aforesaid bed frame (1) one side is equipped with drive gear group (5), output gear (53) of this drive gear group (5) with move rack portion (71) meshing of cutter (7) one side, its characterized in that shirk the mechanism and include:

a rotating shaft (41c) rotatably provided on the base frame (1) in parallel with the longitudinal direction of the print head (2); a first swing rod (4) and a second swing rod (4c) which can rotate along with the rotating shaft (41c) are respectively arranged at the two ends of the gear box, a first gear tooth (41) is formed at one side of the first swing rod (4) and a first driving part (43) is arranged at one end of the first swing rod,

the handle (3) is rotatably arranged on the base frame (1), a second gear tooth (31) which is meshed with the first gear tooth (41) for transmission is formed on the inner side of the handle, and the outer end of the handle extends outwards to form a pulling part (32);

a reset piece (9) which is arranged on the base frame (1) and always forces the rotating shaft (41c) to keep an initial state; and

the shaft lever (15b) is arranged on the mounting rack (11b) and is parallel to the rubber roll shaft (122 b);

grooves (15) for arranging shaft rods (15b) are respectively formed in two sides of the base frame (1), and the first swing rod (4) and the second swing rod (4c) are respectively arranged close to the grooves (15); a slide block (6) which can drive the output gear (53) to rotate is elastically arranged on the base frame (1),

when the mounting frame (11b) is arranged on the base frame (1), the rubber roller (121b) of the rubber roller assembly (12b) is close to the printing head (2), and the shaft rod (15b) is arranged in the groove (15);

the second gear teeth (31) drive the first gear teeth (41) under the state of applying force to the wrenching part (32), the first swing rod (4) rotates, so that the rotating shaft (41c) rotates, the second swing rod (4c) rotates, the first swing rod (4) and the second swing rod (4c) drive the shaft lever (15b) simultaneously, the shaft lever (15b) is forced to be separated from the groove (15), the mounting frame (11b) is separated from the base frame (1), meanwhile, the first driving part (43) of the first swing rod (4) drives the sliding block (6) to move, the sliding block (6) acts on the output gear (53), and the output gear (53) rotates and drives the movable knife (7) to return.

2. A thermal printer movement according to claim 1, characterised in that the shaft (15b) is provided with a rubber roller holder (13b), two ends of the rubber roller holder (13b) extend upwards to provide support portions (14b), and the rubber roller assembly (12b) is rotatably provided on the support portions (14 b).

3. The thermal printer movement according to claim 1, wherein the base frame (1) is provided with a strip-shaped groove (111), the slider (6) is elastically disposed in the strip-shaped groove (111) through a return spring (63), and a bottom end and a top end of the slider (6) are respectively provided with a first abutting portion (61) and a second abutting portion (62), the first abutting portion (61) is disposed near the first swing link (4), the second abutting portion (62) is disposed near the output gear (53), and the first swing link (4) can drive the first abutting portion (61) after rotating, so that the second abutting portion (62) of the slider (6) drives the output gear (53).

4. The thermal printer movement according to claim 1, wherein the transmission gear set (5) includes a driving gear (51), an intermediate gear (52) and an output gear (53), the intermediate gear (52) is a duplicate gear and has two ends respectively engaged with the driving gear (51) and the output gear (53), the intermediate gear (52) is rotatably disposed on a support shaft (81) of a gear bracket (8), the gear bracket (8) is disposed on the base frame (1) and can rotate around a fulcrum, and the first swing link (4) drives the gear bracket (8) to rotate and enables the intermediate gear (52) to be disengaged from the driving gear (51) in a pressing state of the toggle portion (32).

5. A thermal printer movement according to claim 4, characterised in that the output gear (53) is rotatably mounted on a fulcrum (14) of the base frame, in that the gear holder (8) has a shaft hole (82) through which the fulcrum (14) passes, in that the gear holder (8) is rotatable about the shaft hole (82) as a central fulcrum, in that a force receiving portion (84) is provided at the lower end of the gear holder (8), and in that the first lever (4) has a second driving portion (44) which cooperates with the force receiving portion (84) to drive the gear holder (8) to rotate.

6. A thermal printer movement according to claim 5, characterised in that the gear holder (8) has a stop (83) for limiting the lateral movement of the slide (6).

7. A thermal printer movement according to claim 1, characterised in that the base frame (1) has a stop groove (16) for the glue roller assembly (12 b).

8. The thermal printer movement according to claim 1, wherein the moving blade (7) has rack portions (71) at both ends, and correspondingly, the output gear (53) is provided with an auxiliary gear (53a) meshed with the rack portions through a connecting shaft (531) and can rotate synchronously.

9. A thermal printer cartridge according to claim 1, wherein the first rocker extends outwardly with a prying portion; the first swing rod can drive the second swing rod through the rotating shaft and can synchronously rotate, and the prying part and the second swing rod can simultaneously act on the driving shaft lever in the pressing state of the wrench.

10. A thermal printer cartridge according to claim 1, wherein the width of the teeth of the output gear increases progressively or decreases progressively along the annular periphery of the output gear, and correspondingly the slide has an inclined portion for contacting engagement with the teeth of the output gear.