CN113263840B

CN113263840B - Thermal printer core

Info

Publication number: CN113263840B
Application number: CN202110464879.5A
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: 2021-04-28
Filing date: 2021-04-28
Publication date: 2024-07-23
Anticipated expiration: 2041-04-28
Also published as: CN113263840A

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 be equipped with and drive output gear pivoted drive assembly. The driving assembly comprises a pushing block and a sliding block, the sliding block after being stressed can push the output gear to rotate, and finally the movable knife 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 printing paper is only required to be slightly pulled to open the handle, the mounting frame and the base frame are sprung out, meanwhile, the first swinging part and the second swinging part can instantaneously act on the stationary knife, 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 under the state that aforementioned mounting bracket was arranged in the bed frame, the rubber roll of rubber roll subassembly is close to beat printer head, and aforementioned moves the sword and 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 that moves 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, 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 provided with a strip-shaped groove, a driving component for driving the output gear to rotate is arranged in the strip-shaped groove, and the driving component comprises

A support shaft inserted in the bar-shaped groove;

The pushing block is sleeved at the bottom end of the supporting shaft and can move up and down;

a slider which is sleeved at the bottom end of the support shaft and can move up and down and transversely, and the bottom surface of the slider is propped against the upper end surface of the push block; and

A return spring sleeved on the support shaft and the bottom end of which is propped against the sliding block;

The first driving part of the first swing rod drives the push block to move upwards, the push block drives the sliding block, the sliding block acts on the output gear, and the output gear rotates and drives the movable cutter to return.

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 sliding block is provided with an inclined part in contact fit with the teeth of the output gear, and the inclined part transversely extends outwards. The design can ensure that the sliding block can smoothly reset and the normal rotation of the output gear is not influenced.

Preferably, the middle part of the sliding block is provided with a waist-shaped hole, and the support shaft is arranged in the waist-shaped hole in a penetrating way and moves transversely relative to the waist-shaped hole.

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.

Preferably, 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 pivot, and the first swing rod drives the gear bracket to rotate and enables the intermediate gear to be separated from the driving gear in a state of being pressed by the pulling part. 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.

The output gear can be rotationally 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 pivot, 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.

Further, the gear bracket is provided with a limiting part for limiting the sliding block to move transversely.

In order to enable the movable cutter to move stably, the two ends of the movable cutter are respectively provided with a rack part, correspondingly, the other end of the supporting shaft is provided with an auxiliary gear meshed with the rack part for transmission, and the auxiliary gear can drive the rack part synchronously with the output gear.

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 wrenching part.

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 pushing block to move, the pushing block acts on the sliding block, 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. 2.

FIG. 6 is a schematic diagram of an assembled structure with a base frame portion removed from the gear set.

Fig. 7 is a cross-sectional view of the base portion of fig. 6.

Fig. 8 is an enlarged view of the first swing link.

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

Fig. 10 is an enlarged view of the handle.

Fig. 11 is an enlarged view of the gear bracket.

Fig. 12 is an enlarged view of the drive assembly of fig. 5.

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 cartridge in the present embodiment includes a base frame portion 1a and a mount portion 1b. The mounting frame 11b is provided on the base frame 1 by a detaching mechanism.

As shown in connection with fig. 3 and 4, the mounting frame portion 1b includes a mounting frame, a rubber roll assembly, a shaft and a rubber roll holder. 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.

As shown in fig. 5, 6 and 7, the base frame part mainly includes a base frame 1, a printhead 2, a movable blade 7, a transmission gear set, and a driving assembly 6. 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.

As shown in fig. 5, 6 and 7, the transmission gear set in the present embodiment includes a driving gear 51, an intermediate gear 52 and an output gear 53, the intermediate gear 52 is a double gear and both ends thereof are respectively engaged with the driving gear 51 and the output gear 53, and the output gear 53 is engaged with a rack portion 71 on one side of the movable blade 7. The drive gear 51 is not driven by the motor. The movable blade 7 has rack portions 71 at both ends, and correspondingly, the output gear 53 is provided with an auxiliary gear 53a through the support shaft 14 and can rotate synchronously. The auxiliary gear 53a is also engaged with one of the rack portions 71.

As shown in fig. 5, 8 and 10, the detaching mechanism in this embodiment includes a rotating shaft 41c, a first swing link 4, a second swing link 4c, a handle 3, a reset member 9 and a shaft 15b, and the rotating shaft 41c is rotatably disposed on the base frame 1 in parallel with the length 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 two ends, a first gear tooth 41 is formed at one side of the first swing rod 4, a first driving part 43 is arranged at one end,

The handle 3 is rotatably arranged on the base frame 1, the inner side is formed with a second gear tooth 31 which is meshed with the first gear tooth 41 for transmission, and the outer end extends outwards to form a pulling part 32; the reset piece 9 is arranged on the base frame 1 and always forces the rotating shaft 41c to keep an initial state; the return member 9 in this embodiment is a torsion spring.

The shaft lever 15b is arranged on the mounting frame 11b and is parallel to the rubber roll shaft 122b; grooves 15 for arranging the shaft rods 15b are respectively arranged on 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; the base frame 1 is also provided with a limit groove 16 for the rubber roller assembly 12 b.

The base frame 1 is provided with a strip-shaped groove 10, and a driving component 6 for driving the output gear 53 to rotate is arranged in the strip-shaped groove 10.

As shown in fig. 5 and 12, the driving unit 6 of the present embodiment includes a support shaft 61, a push block 64, a slider 63, and a return spring 62, and the support shaft 61 is inserted into the bar-shaped groove 10; the pushing block 64 is sleeved at the bottom end of the supporting shaft 61 and can move up and down; the sliding block 63 is sleeved at the bottom end of the supporting shaft 61 and can move up and down and transversely, and the bottom surface of the sliding block 63 is propped against the upper end surface of the pushing block 64; specifically, the slider 63 has a waist-shaped hole 632 in the middle, and the support shaft 61 is inserted into the waist-shaped hole 632 and moves in the lateral direction. The reset spring 62 is sleeved on the support shaft 61 and the bottom end of the reset spring abuts against the sliding block 63;

The widths of the teeth of the output gear 53 sequentially increase or sequentially decrease along the annular outer circumference of the output gear 53, and correspondingly, the slider 63 has an inclined portion 631 in contact engagement with the teeth of the output gear 53, the inclined portion 631 extending laterally outward.

As shown in fig. 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, in which the teeth 531, 532 and 533 are sequentially decreased, and the shaft hole 534 in the middle of the output gear is a kidney-shaped hole, so that the output gear can move up and down with respect to the support shaft 14. The slider 6 has an inclined portion 63 that is in contact engagement with the teeth of the output gear 53. The inclined portion 631 protrudes laterally outward. 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. The intermediate gear 52 is rotatably disposed on the support shaft 81 of the gear bracket 8, the gear bracket 8 is disposed on the base frame 1 and is rotatable about a pivot, and the first swing link 4 drives the gear bracket 8 to rotate and causes the intermediate gear 52 to be disengaged from the driving gear 51 in a state in which the pulling portion 32 is pressed.

The output gear 53 is rotatably provided on the support shaft 14 of the base frame, correspondingly, in combination with fig. 11, the gear bracket 8 has a shaft hole 82 through which the support shaft 14 passes, the gear bracket 8 is rotatable about the shaft hole 82 as a center pivot, and the lower end of the gear bracket 8 has a stress portion 84, and correspondingly, the first swing link 4 has a second driving portion 44 that cooperates with the stress portion 84 to drive the gear bracket 8 to rotate. The gear bracket 8 has a stopper 83 for restricting the lateral movement of the slider 63.

As shown in fig. 8, the first swing rod 4 extends outwards to form a prying part 42; the first swing rod 4 is provided with a rotary shaft 41c capable of driving the second swing rod 4c and synchronously rotating, and the prying part 42 and the second swing rod 4c can simultaneously act on the driving shaft lever 15b under the pressing state of the wrenching part 32.

In the state of applying force to the pulling portion 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 portion 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 portion 43 of the first swing rod 4 drives the push block 64, the push block 64 drives the sliding block 63, the sliding block 63 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 62.

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 mounting bracket (11 b) set up under the state of bed frame (1), rubber roll (121 b) of rubber roll subassembly (12 b) are close to print head (2), aforementioned move sword (7) movably locate on bed frame (1) and have rack portion (71) in one end at least, aforementioned bed frame (1) one side is equipped with drive gear group, the output gear (53) of this drive gear group meshes with rack portion (71) of moving sword (7) one side, 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);

a strip-shaped groove (10) is arranged on the base frame (1), a driving component for driving the output gear to rotate is arranged in the strip-shaped groove, and the driving component comprises

A support shaft (61) inserted into the bar-shaped groove;

a pushing block (64) sleeved at the bottom end of the support shaft (61) and capable of moving up and down;

A slider (63) which is fitted to the bottom end of the support shaft (61) and is movable up and down and laterally, and the bottom surface of which slider (63) abuts against the upper end surface of the push block (64); and

A return spring (62) which is sleeved on the support shaft (61) and the bottom end of which is propped against the sliding block (63);

Under the condition that a pulling part (32) is forced, the second gear teeth (31) drive the first gear teeth (41), the first gear teeth (41) drive the first swing rod (4) to rotate, 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 push block (64) to move upwards, the push block (64) drives the slide block (63), the slide block (63) acts on the output gear (53), and the output gear (53) rotates and drives the movable cutter (7) to return;

The widths of the teeth of the output gear (53) sequentially increase or sequentially decrease along the annular periphery of the output gear (53), and correspondingly, the sliding block (63) is provided with an inclined part (631) in contact fit with the teeth of the output gear (53), and the inclined part (631) transversely extends outwards;

The middle part of the sliding block (63) is provided with a waist-shaped hole (632), and the supporting shaft (61) is arranged in the waist-shaped hole (632) in a penetrating way and moves transversely relatively;

the transmission gear set 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 a base frame (1) and can rotate around a fulcrum, 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);

The gear bracket (8) is provided with a limiting part (83) for limiting the lateral movement of the sliding block (63).

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. A thermal printer movement according to claim 2, wherein the output gear (53) is rotatably disposed on the supporting shaft (14) of the base frame, and correspondingly, 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) as a center pivot, and the lower end of the gear bracket (8) has a force receiving portion (84), and correspondingly, the first swing rod (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 movement according to claim 3, wherein the movable blade (7) has a rack portion (71) at both ends thereof, and correspondingly, an auxiliary gear (53 a) engaged with the rack portion is provided at the other end of the supporting shaft (14), and the auxiliary gear (53 a) can drive the rack portion (71) synchronously with the output gear.

5. A thermal printer cartridge according to claim 1, characterized in that said first oscillating bar (4) extends outwards with a prying portion (42); the first swing rod (4) is provided with a second swing rod (4 c) through a rotating shaft (41 c), the second swing rod and the first swing rod can synchronously rotate, and the prying part (42) and the second swing rod (4 c) can simultaneously act on the driving shaft lever (15 b) under the pressing state of the wrenching part (32).