CN112848692B

CN112848692B - Thermal printer core

Info

Publication number: CN112848692B
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: 2024-07-19
Anticipated expiration: 2041-03-10
Also published as: CN112848692A

Abstract

The utility model provides a thermal printer core, includes bed frame, mounting bracket, beat printer head, moves sword and rubber roll subassembly, and aforementioned beat printer head and locate on the bed frame, this mounting bracket is located on the aforesaid bed frame through detaching the mechanism, and aforementioned move the sword and locate on the bed frame and have rack portion in at least one end movably, its characterized in that detaching the mechanism include pivot, handle, reset piece and axostylus axostyle, the bed frame on elastically be equipped with and drive output gear pivoted slider. The stressed sliding block moves to push the output gear to rotate, and finally the movable cutter returns. Even if the cutter is jammed, the sliding block still can smoothly drive the movable cutter to return.

Description

Thermal printer core

Technical Field

The present disclosure relates to printing devices, and particularly 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 roller which can be rotationally arranged on the base frame, wherein 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 a rubber roller gear arranged at the end part of the rubber roller, the rubber roller is used for driving printing paper to move, a paper feeding channel is arranged between the rubber roller and the printing head assembly, the printing head assembly generally comprises a printing head (TPH, thermal Print Head for short), a printing head support, a pressure spring and a pressure spring support frame, the printing head is arranged on the printing head support frame, two ends of the pressure spring support frame are arranged at two ends of the base frame, and two ends of the pressure spring are respectively propped against the printing head support frame and the pressure spring support frame, so that the printing head can compress the printing paper on the surface of the rubber roller. When the printing paper is loaded or corrected, the printing paper is generally realized by disassembling the rubber roller, two ends of the rubber roller are generally provided with two bearings, the base frame is provided with a groove for the bearings to be arranged, the groove is semicircular, and the bearings are always positioned in the groove in the working state; when the paper is needed to be fed, the rubber roller communication bearing can be easily separated from the groove. However, the following disadvantages exist: the bearing has larger play amplitude in the groove, and the normal operation of the rubber roller is affected.

Therefore, an improved structure is disclosed in the prior art, and the patent refers to the 'micro heat medium printer movement' (issued publication number CN 2725292Y) of China patent No. ZL200520130017.5, in which a door-opening pressing sheet and a return spring sheet are additionally arranged, and the pressure of the return spring sheet acts on the door-opening pressing sheet, so that the rubber roller is ensured to be stably positioned in a positioning groove, and when paper is fed, the rubber roller is naturally separated from the positioning groove only by operating a pulling part of the door-opening pressing sheet to overcome the pressure of the return spring sheet. The operation is simple, positioning preparation and smooth operation are realized, but the whole structure of the structure is complex, the door opening pressing sheet is an unconventional part, the process difficulty is improved, and the manufacturing cost is increased.

On the basis, the inventor develops a novel detachable structure of the rubber roller, see Chinese patent utility model' base frame and rubber roller assembly structure of patent number ZL201120357824.6 and thermal printer (authority notice number CN 202271666U) applying the assembly structure, and the bearing in the patent is arranged in the groove of the base frame through a special clamp spring, so that the assembly and the disassembly of the rubber roller are easy and quick, and meanwhile, the bearing hardly moves under the action of the elastic limiting part in the use process, so that the normal and stable operation of the rubber roller is ensured.

As a further improvement, the inventor also applies for a thermal printer, see Chinese patent No. ZL 201710535432.6' thermal printer (issued publication No. CN 107310276B), wherein when printing paper is loaded or needs to be corrected, the spanner is only required to be pulled slightly, the mounting frame and the base frame are sprung out, meanwhile, the first swinging part and the second swinging part can act on the stationary knife instantly, the stationary knife sinks in the vertical direction, the contact positive pressure of the movable knife edge and the stationary knife edge is reduced, the resistance of the movable knife to return is relieved, and the movable knife returns smoothly. However, in the actual use situation, when the cut paper is jammed between the contact surfaces of the movable knife and the fixed knife (generally called as a jam), the sinking abdication of the fixed knife is difficult to reduce the resistance of the jam to the return of the movable knife, and the starting knife cannot be retracted, so that the function is invalid.

Disclosure of Invention

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

The technical scheme adopted 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 aforementioned beat printer head and locate on the bed frame, aforementioned rubber roll subassembly is located on the mounting bracket through the rubber roll axle can rotate, and this mounting bracket is located on aforementioned bed frame through the mechanism of shirking, and aforementioned move the sword can locate on the bed frame movably and have rack portion in at least one end, and aforementioned bed frame one side is equipped with drive gear group, the output gear of this drive gear group meshes with the rack portion of moving sword one side, its characterized in that shirking the mechanism include:

A rotating shaft, which is rotatably arranged on the base frame in parallel with 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, 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, the inner side of the handle is provided with second gear teeth which are meshed with the first gear teeth for transmission, 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 frame and is parallel to the rubber roll shaft;

Grooves for the shaft lever 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 sliding block which can drive the output gear to rotate,

In the state that 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 first swing rod drives the shaft lever to separate from the groove, the mounting frame is separated from the base frame, meanwhile, the first driving part of the first swing rod drives the sliding block to move, the sliding block acts on the output gear, and the output gear rotates and drives the movable cutter to return.

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

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

Further, the transmission gear set includes a driving gear, an intermediate gear and an output gear, the intermediate gear is a duplex gear, two ends of the intermediate gear are respectively meshed with the driving gear and the output gear, the intermediate gear is rotatably arranged on a supporting shaft of a gear bracket, the gear bracket is arranged on the base frame and can rotate around a fulcrum, and the first swing rod drives the gear bracket to rotate and enables the intermediate gear to be separated from the driving gear under the condition that the pulling part is pressed.

The output gear is rotatably arranged on the supporting shaft of the base frame, correspondingly, the gear support is provided with a shaft hole for the supporting shaft to pass through, the gear support can rotate by taking the shaft hole as a central supporting point, the lower end of the gear support is provided with a stress part, and correspondingly, the first swing rod is provided with a second driving part matched with the stress part to drive the gear support to rotate. The first swing rod can drive the gear bracket to drive the intermediate gear to separate from the driving gear after rotating, so that the power transmission of the movable knife is cut off, the smooth return of the movable knife is ensured, and the safety of operators can be ensured.

In order to ensure that the sliding blocks can orderly move, the gear bracket is provided with a limiting part for limiting the sliding blocks to transversely move.

Further, the base frame is provided with a limit groove for the rubber roller assembly.

In order to enable the moving knife to move stably, the two ends of the moving 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 synchronously rotate.

Further, the first swing rod is outwards extended with a prying part; 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 rod under the pressing state of the handle.

The widths of the gear teeth of the output gear are sequentially increased or sequentially decreased along the annular periphery of the output gear, and correspondingly, the sliding block is provided with an inclined part in contact fit with the gear teeth of the output gear. The design can ensure that the sliding block can smoothly reset and the normal rotation of the output gear is not influenced.

Compared with the prior art, the invention has the advantages that: the handle is pressed down, the handle 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 push the rack part to move backwards, and the rack part is a part of the movable knife, so that the movable knife returns finally. Even if the cutter is jammed, the sliding block can smoothly drive the movable cutter to return, so that the condition that the movable cutter cannot return and the function fails is avoided.

Drawings

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

Fig. 2 is a view of the base portion and the mounting bracket portion after being disengaged.

Fig. 3 is an assembly view of the mounting bracket portion 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 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 view of the structure of the main body frame.

Fig. 11 is an enlarged view of the handle.

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

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

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

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1, 2 and 3, the thermal printer core in this embodiment includes a base frame portion and a mounting frame portion, and as shown in fig. 3 and 4, the mounting frame portion includes a mounting frame, a rubber roll assembly, a shaft and a rubber roll bracket. The shaft lever 15b, the rubber roll assembly 12b is rotatably arranged on the mounting frame 11b through the rubber roll shaft 122b, and the shaft lever 15b is arranged on the mounting frame 11b and is parallel to the rubber roll shaft 122b; the shaft lever 15b is provided with a rubber roller bracket 13b, two ends of the rubber roller bracket 13b are provided with supporting parts 14b in an upward extending mode, and the rubber roller assembly 12b is rotatably arranged on the supporting parts 14 b.

Referring to fig. 5 and 6, the base frame part mainly includes a base frame 1, a handle 3, a printhead 2, a movable blade 7, and a driving gear set 5. The printhead 2 is provided on the base frame 1. The base frame 1 in this embodiment is assembled from a main body frame 11, a cover plate 12, and a top plate 13.

The movable knife 7 is movably disposed on the base frame 1, one end of the movable knife is provided with a rack portion 71, one side of the base frame 1 is provided with a transmission gear set 5, and as shown in fig. 5 and 6, the transmission gear set 5 in this embodiment includes a driving gear 51, an intermediate gear 52 and an output gear 53, the intermediate gear 52 is a duplex gear, two ends of the intermediate 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 driving gear 51 is driven by a motor (not shown). The movable blade 7 has rack portions 71 at both ends, and correspondingly, the output gear 53 is provided with an auxiliary gear 53a via a connection shaft 531 so as to be rotatable in synchronization. The auxiliary gear 53a is also engaged 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 printhead 2; the two ends are respectively provided with a first swing rod 4 and a second swing rod 4c which can rotate along with the rotating shaft 41c, one side of the first swing rod 4 is provided with a first gear tooth 41 in a forming mode, one end of the first swing rod 4 is provided with a first driving part 43 and a second driving part 44, and the first swing rod 4 is outwards extended with a prying part 42.

As shown in fig. 11, the handle 3 is rotatably provided on the base frame 1, and the outer end of the second gear teeth 31 engaged with the first gear teeth 41 is formed on the inner side thereof to protrude outward to form a pulling portion 32.

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

As shown in fig. 5 and 6, two sides of the base frame 1 are respectively provided with a groove 15 in which a shaft lever 15b is arranged, and the base frame 1 is provided with a limit groove 16 in which the rubber roller assembly 12b is arranged. The first swing rod 4 and the second swing rod 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 this embodiment, the body frame 11 is provided with a bar-shaped groove 111, and the slider 6 is elastically disposed in the bar-shaped groove 111 by 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 close to the first swing rod 4, the second abutting portion 62 is close to the output gear 53, a positioning portion 64 for setting the return spring 63 is arranged on the slider 6, and the first swing rod 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.

As shown in connection with fig. 8 and 9, the widths of the teeth of the output gear 53 are sequentially increased or sequentially decreased along the annular outer circumference of the output gear, and in the drawings, the teeth 531, 532, and 533 are sequentially decreased. The slider 6 has an inclined portion 63 that is in contact engagement with the teeth of the output gear 53. The gear teeth can be avoided by matching the gear teeth of the inclined part 63 and the output gear 53, so that the design can ensure that the sliding block can smoothly reset and the normal rotation of the output gear 53 is not influenced.

As shown in fig. 5, the intermediate gear 52 is rotatably provided on a support shaft 81 of the gear bracket 8, and as shown in fig. 13, the gear bracket 8 is provided on the base frame 1 and is rotatable about a fulcrum, and the gear bracket 8 has a stopper 83 for restricting the lateral movement of the slider 6. In a state where the pulling portion 32 is pressed, the first swing link 4 drives the gear bracket 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 disposed 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 disposed on a side boss 112 of the base frame 1 and is rotatable. The gear bracket 8 is rotatable about the shaft hole 82 as a center fulcrum, and the lower end of the gear bracket 8 has a force receiving portion 84, and correspondingly, the first swing link 4 has a second driving portion 44 (see fig. 7) that cooperates with the force receiving portion 84 to drive the gear bracket 8 to rotate.

In a state that 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 is located in the limiting groove 16, and the shaft lever 15b is arranged in the groove 15.

In the state of applying force to the pulling part 32, the second gear teeth 31 drive the first gear teeth 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 lever 15b, 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 cutter 7 to return; and simultaneously, the second driving part 44 of the first swing rod 4 acts on the stress part 84 of the gear bracket 8 to enable the gear bracket 8 to rotate around the shaft hole 82, so as to drive the intermediate gear 52 to be separated from the driving gear, and cut off the transmission of the movable cutter. After the external force is removed, the slider 6 returns to the original position under the urging force of the return spring 63.

Claims

1. The utility model provides a thermal printer core, including bed frame (1), mounting bracket (11 b), print head (2), move sword (7) and rubber roll subassembly (12 b), aforementioned print head (2) are located on bed frame (1), aforementioned rubber roll subassembly (12 b) are located on mounting bracket (11 b) through rubber roll axle (122 b) rotatablely, this mounting bracket (11 b) are located on aforementioned bed frame (1) through detaching mechanism, aforementioned move sword (7) can locate on bed frame (1) movably and have rack portion (71) in at least one end, aforementioned bed frame (1) one side is equipped with drive gear group (5), output gear (53) and the rack portion (71) of moving sword (7) one side of this drive gear group (5) mesh, its characterized in that detaching mechanism include:

A rotating shaft (41 c) rotatably provided on the base frame (1) in the longitudinal direction of the parallel print head (2); a first swing rod (4) and a second swing rod (4 c) which can rotate along with the rotating shaft (41 c) are respectively arranged at two ends, 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,

A handle (3) rotatably arranged on the base frame (1), wherein the inner side is formed with a second gear tooth (31) meshed with the first gear tooth (41) for transmission, and the outer end 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 (41 c) to keep an initial state; and

A shaft lever (15 b) provided on the mounting frame (11 b) and parallel to the rubber roller shaft (122 b);

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

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

In a state of applying force to the pulling part (32), the second gear teeth (31) drive the first gear teeth (41), the first swing rod (4) rotates, so that the rotating shaft (41 c) rotates, the second swing rod (4 c) rotates, the first swing rod (4) and the second swing rod (4 c) simultaneously drive the shaft lever (15 b), the shaft lever (15 b) is forced to be separated from the groove (15), the mounting frame (11 b) 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 cutter (7) to return;

The base frame (1) is provided with a strip-shaped groove (111), the sliding block (6) is elastically arranged in the strip-shaped groove (111) through a return spring (63), a first abutting part (61) and a second abutting part (62) are respectively arranged at the bottom end and the top end of the sliding block (6), the first abutting part (61) is arranged close to the first swinging rod (4), the second abutting part (62) is arranged close to the output gear (53), the first swinging rod (4) can drive the first abutting part (61) after rotating, and the second abutting part (62) of the sliding block (6) can drive the output gear (53);

The transmission gear set (5) comprises a driving gear (51), an intermediate gear (52) and an output gear (53), wherein the intermediate gear (52) is a duplex gear, two ends of the intermediate gear are respectively meshed with the driving gear (51) and the output gear (53), the intermediate gear (52) can be rotatably arranged on a supporting shaft (81) of a gear bracket (8), the gear bracket (8) is arranged on the base frame (1) and can rotate around a supporting point, and under the pressing state of a pulling part (32), the first swing rod (4) drives the gear bracket (8) to rotate and enables the intermediate gear (52) to be separated from the driving gear (51).

2. The thermal printer core according to claim 1, wherein the shaft lever (15 b) is provided with a rubber roller bracket (13 b), two ends of the rubber roller bracket (13 b) are provided with supporting parts (14 b) in an upward extending manner, and the rubber roller assembly (12 b) is rotatably arranged on the supporting parts (14 b).

3. The thermal printer core according to claim 1, wherein the output gear (53) is rotatably disposed on a supporting shaft (14) of the base frame, and the gear bracket (8) has a shaft hole (82) through which the supporting shaft (14) passes, the gear bracket (8) is rotatable about the shaft hole (82), and the lower end of the gear bracket (8) has a force receiving portion (84), and the first swing link (4) has a second driving portion (44) that cooperates with the force receiving portion (84) to drive the gear bracket (8) to rotate.

4. A thermal printer cartridge according to claim 3, wherein the gear bracket (8) has a stopper (83) for restricting the lateral movement of the slider (6).

5. The thermal printer core according to claim 1, characterized in that the base frame (1) is provided with a limit groove (16) for the rubber roller assembly (12 b).

6. A thermal printer movement according to claim 1, characterized in that the two ends of the moving blade (7) are provided with a rack portion (71), and correspondingly, the output gear (53) is provided with an auxiliary gear (53 a) engaged with the rack portion through a connecting shaft (531) and can rotate synchronously.

7. The thermal printer cartridge of claim 1, wherein said first swing link extends outwardly with a pry; 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 rod under the pressing state of the handle.

8. A thermal printer cartridge according to claim 1, wherein the widths of the teeth of the output gear sequentially increment or sequentially decrement along the annular periphery of the output gear, and correspondingly, the slider has an inclined portion that is in contact engagement with the teeth of the output gear.