CN116945780A

CN116945780A - Thermal printer core

Info

Publication number: CN116945780A
Application number: CN202210416325.2A
Authority: CN
Inventors: 蒋文柏; 张敏; 陈志锋; 林枫; 范文飞
Original assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Current assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2023-10-27

Abstract

The thermal printer core comprises a first machine body and a second machine body, wherein the first machine body is detachably arranged on the second machine body through a detaching mechanism, a first machine frame of the first machine body, a rubber roller assembly and a fixed cutter, the rubber roller is rotatably arranged on the first machine frame, and the fixed cutter is arranged on the first machine frame; the second machine body comprises a second machine frame, a thermal printing head, a movable cutter assembly, a first transmission gear set and a detaching mechanism, wherein the thermal printing head, the movable cutter assembly, the first transmission gear set and the detaching mechanism are arranged on the second machine frame; the detaching mechanism comprises a rotating shaft, a wrench and a first resetting piece. When a paper jam occurs, the spanner is pressed down, the first machine body and the second machine body can be separated, meanwhile, the swing rod acts on the movable cutter assembly, so that the movable cutter assembly moves back rapidly, the movable cutter assembly and the fixed cutter are separated instantaneously, the paper jam is thoroughly removed, and the situation that the movable cutter assembly cannot retract and the function fails is avoided.

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 respectively abut 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.

The inventor applies for a thermal printer, see Chinese patent publication No. ZL201710535432.6 for thermal printer (issued publication No. CN 107310276B), in which when printing paper is loaded or needs correction treatment, the mounting frame is sprung away from the base frame by slightly pulling the handle, and meanwhile, the first and second swinging parts 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 application aims to solve the technical problem of providing a thermal printer core with a card paper back moving knife assembly capable of returning rapidly.

The technical scheme adopted for solving the technical problems is as follows: the thermal printer core comprises a first machine body and a second machine body, wherein the first machine body is detachably arranged on the second machine body through a detaching mechanism, a first machine frame of the first machine body, a rubber roller assembly and a fixed cutter, the rubber roller is rotatably arranged on the first machine frame, and the fixed cutter is arranged on the first machine frame;

the second machine body comprises a second machine frame, a thermal printing head, a movable cutter assembly, a first transmission gear set and a detaching mechanism, wherein the thermal printing head, the movable cutter assembly, the first transmission gear set and the detaching mechanism are arranged on the second machine frame;

the movable cutter assembly is movably arranged on the second frame, at least one end of the movable cutter assembly is provided with a rack part, and the movable cutter assembly is matched with the fixed cutter to finish paper cutting; the first transmission gear set is arranged on one side of the second frame, an output gear of the first transmission gear set is meshed with a rack part on one side of the movable cutter assembly, the first machine body is arranged in the second machine body, and the rubber roller assembly is close to the thermal printing head;

the detaching mechanism comprises

The rotating shaft is arranged on the second frame in parallel with the length direction of the thermal printing head; the two ends of the first swing piece and the second swing piece are respectively provided with a first stress part capable of driving the rubber roller assembly to separate from the second machine body, and one side of the first swing piece is formed with a first stress part;

the wrench is rotatably arranged on the second rack, a first force application part matched with the first force receiving part and a second force application part matched with the bottom end of the swing rod are formed on the inner side of the wrench, and the outer end of the wrench extends outwards to form a handle part; and

the first reset piece is arranged on the second rack and always forces the rotating shaft to keep an initial state;

the handle of the wrench is pressed, the first force application part acts on the first force application part, the first swinging part rotates, so that the rotating shaft rotates, the second swinging part rotates, the first swinging part and the second swinging part simultaneously drive two ends of the rubber roller assembly, the rubber roller assembly is forced to be separated from the groove, the first frame is separated from the second frame, meanwhile, the second force application part of the wrench acts on the bottom end of the swinging rod, and after the swinging rod rotates, the top end of the swinging rod drives the movable cutter assembly to translate and return.

The wrench is provided with a third force application part, the second rack is provided with a first transmission gear set, a first motor and a wheel carrier, the first transmission gear set at least comprises a driving gear, an intermediate gear and an output gear, the driving gear is in driving connection with the first motor, 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 can be rotatably arranged on a supporting shaft of the wheel carrier, the wheel carrier can rotate around a supporting point and is provided with a second force application part, the handle part of the wrench is in a pressing state, the third force application part of the wrench can drive the second force application part of the wheel carrier, and the wheel carrier is further rotated, so that the intermediate gear is far away from the driving gear to be disengaged. And the power transmission of the movable knife is cut off, so that the smoothness of the return of the movable knife is ensured, and the safety of operators can be ensured.

Further, the second stress part and the supporting shaft are respectively positioned at two sides of the supporting point of the wheel frame, and the connecting line of the stress point of the second stress part and the supporting point and the connecting line of the central axis of the supporting shaft and the supporting point form an acute angle.

Further, a second reset piece which always forces the wheel frame to keep the initial position is arranged on the second frame.

Further, the rear end of the auxiliary gear is provided with a cavity, and a third reset piece is arranged in the cavity and acts on the auxiliary gear and always forces the auxiliary gear to drive the rack part to move away from the direction of the fixed knife.

Further, a strip-shaped hole is formed in one side, close to the rack portion, of the carrier plate, and the bottom end of the swing rod extends into the strip-shaped hole.

Further, a limiting block which can limit the swing amplitude of the swing rod is arranged on one side of the second frame, close to the swing rod.

For making move the sword subassembly and remove steadily, move the sword subassembly and include the carrier plate and locate the movable blade on the carrier plate, the both ends of aforementioned carrier plate all have rack portion, be equipped with the connecting axle in the second frame, output gear locate the one end of connecting axle, the other end of this connecting axle be equipped with rack portion meshing driven auxiliary gear, this auxiliary gear can with output gear synchronous drive rack portion.

Compared with the prior art, the application has the advantages that: when the paper is jammed, the spanner is pressed down, the first machine body and the second machine body can be separated at first, meanwhile, the swing rod acts on the movable cutter assembly, so that the movable cutter assembly moves back rapidly, the movable cutter assembly and the fixed cutter are separated instantaneously, the paper jam is thoroughly relieved, and the situation that the movable cutter assembly cannot retract and the function fails is avoided.

Drawings

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

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic view of another view structure of the second body in fig. 2.

Fig. 4 is a schematic structural view of the second body in fig. 2 after the gear cover is removed.

Fig. 5 is an enlarged partially exploded view of fig. 4.

Fig. 6 is an enlarged view of the wheel carrier and second restoring member combination of fig. 5.

Fig. 7 is an enlarged view of the reverse side of the gear cover.

Fig. 8 is another perspective view of the wrench of fig. 5.

Fig. 9 is a schematic view of the second body portion.

Fig. 10 is a partially exploded view of fig. 9.

Detailed Description

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

As shown in fig. 1 to 4, the thermal printer core in the present embodiment includes a first body 1a and a second body 1b, the first body 1a is detachably disposed on the second body 1b by a detaching mechanism, the first body 1a includes a first frame 11a, a rubber roller assembly 12a and a stationary knife 13a, the rubber roller is rotatably disposed on the first frame 11a, and the stationary knife 13a is disposed on the first frame 11 a; in a state where the first body 1a is disposed on the second body 1b, the rubber roller assembly 12a is close to the thermal head 15b.

Referring to fig. 9 and 10, the second body 1b includes a second frame 11b, a thermal print head 15b, a moving blade assembly 14b, a first driving gear set 5, a second driving gear set 5a, a first motor 6, a second motor 6a, a wheel frame 3, and a detaching mechanism, where two sides of the front end of the second frame 11b have grooves 16b for the glue roller assembly 12 a; the second motor 6a drives the rubber roller assembly 12a to rotate through the second transmission gear set 5a, and the power output end of the second transmission gear set 5a is meshed with the rubber roller gear 121 for transmission.

The movable cutter assembly 14b is movably arranged on the second frame, and the two ends of the movable cutter assembly are provided with rack parts 144, and the movable cutter assembly 14b is matched with the fixed cutter 13a to cut paper; the first transmission gear set 5 is disposed on one side of the second frame, and the output gear 51 of the first transmission gear set 5 is meshed with the rack portion 144 on one side of the movable blade assembly 14 b.

A swing rod 2 is rotatably arranged on one side of the second frame 11b, and the top end of the swing rod 2 can prop against the movable cutter assembly 14b and drive the movable cutter assembly 14b to translate and return. One side of the second frame 11b is also provided with a limiting block 16b for limiting the rotation amplitude of the swing rod, as shown in fig. 4.

As shown in fig. 5, 9 and 10, the detaching mechanism includes a rotating shaft 41a, a wrench 1 and a first reset member 1c, where the rotating shaft 41a is parallel to the length direction of the thermal print head 15b and is disposed on the second frame; the two ends are respectively provided with a first swinging part 4 and a second swinging part 4a which can drive the rubber roller assembly 12a to separate from the second machine body 1b, and a first stress part 41 is formed on one side of the first swinging part 4.

The wrench 1 is rotatably arranged on the second frame 11b, the inner side of the wrench is provided with a first force application part 11, a second force application part 12 and a third force application part 13, and the outer end of the wrench extends outwards to form a handle part 14; as shown in fig. 2 and 7, the gear cover 13b is arranged on the outer side of the first transmission gear set, the protruding shaft 131 is arranged on the inner side of the gear cover 13b, and the protruding shaft 131 is matched with the shaft hole of the wrench 1 to realize rotation of the wrench 1.

The first reset piece 1c is arranged on the second frame 11b and always forces the rotating shaft 41a to keep an initial state; the first restoring member 1c in this embodiment is a torsion spring, and is sleeved on the shaft 112.

The first transmission gear set includes a driving gear 53, an intermediate gear 52 and an output gear 51, the driving gear 53 is in driving connection with the first motor 6, the intermediate gear 52 is a duplex gear, two ends of the intermediate gear are respectively meshed with the driving gear 53 and the output gear 51, the intermediate gear 52 is rotatably arranged on the supporting shaft 31 of the wheel carrier 3, and the wheel carrier 3 can rotate around a fulcrum and has the second stress portion 32. The output gear 51 and the swing link 2 in this embodiment are both provided on the shaft 111.

As shown in fig. 4, the second stress portion 32 and the supporting shaft 31 in the present embodiment are respectively located at two sides of the pivot of the wheel frame 3, and the connection line between the stress point of the second stress portion 32 and the pivot and the connection line between the central axis of the supporting shaft 31 and the pivot form an acute angle. In connection with fig. 6, the second frame 11b is provided with a second reset element 2c for always forcing the wheel frame 3 to maintain the initial position, specifically, the second reset element 2c adopts a torsion spring, the wheel frame 3 has an abutting portion 33 near the second stress portion 32, and one end of the second reset element 2c is always in contact with the abutting portion 33. The second reset piece 2c can drive the wheel frame 3 to quickly reset under the condition that the external force is removed by the wrench, so that the movable knife assembly quickly resets.

As shown in fig. 4 and 10, the movable blade assembly 14b includes a carrier 142 and a movable blade 141 disposed on the carrier 142, both ends of the carrier 142 have a rack portion 144, a connection shaft 512 is disposed on the second frame 11b, the output gear 51 is disposed at one end of the connection shaft 512, an auxiliary gear 511 engaged with the rack portion 144 is disposed at the other end of the connection shaft 512, and the auxiliary gear 511 can synchronously drive the rack portion 144 with the output gear 51. One side of the carrier plate 142 in this embodiment has a bar-shaped hole 143 into which the top end of the swing rod 2 extends.

The rear end of the auxiliary gear 511 has a cavity in which a third return element 3c is arranged, which acts on the auxiliary gear 511 and forces the auxiliary gear 511 to drive the rack portion 144 to move away from the stationary knife all the time. The third restoring member in this embodiment may employ a torsion spring or a coil spring.

When a paper jam occurs, the handle 14 of the wrench 1 is pressed, the first force application part 11 acts on the first force receiving part 41, the first swinging part 4 rotates, so that the rotating shaft 41a rotates, the second swinging part 4a rotates, the first swinging part 4 and the second swinging part 4a synchronously drive two ends of the rubber roller assembly 12a, the rubber roller assembly 12a is forced to be separated from the groove 16b, and the first rack 11a is separated from the second rack 11b; at the same time, the third force application part 13 of the wrench 1 can drive the second force receiving part 32 of the wheel frame 3, so that the wheel frame 3 rotates, and the intermediate gear 52 is separated from the driving gear 53 to be disengaged; meanwhile, the second force application part 12 of the wrench 1 acts on the bottom end of the swing rod 2, after the swing rod 2 rotates, the top end of the swing rod 2 drives the movable cutter assembly 14b to translate and return, driving force is provided by the swing rod 2 and the third reset piece 3c together in the early moving process of the carrier plate 142, and driving force is provided by the third reset piece 3c only in the subsequent moving process of the carrier plate 142. The swing rod 2 has smaller rotation amplitude, when the paper is jammed, the swing rod 2 provides assistance, the carrier plate 142 moves back, the paper jam is relieved, and in the subsequent moving process of the carrier plate 142, the assistance of the third reset piece 3c is enough to cope with, so that the assistance of the swing rod 2 is not needed.

Claims

1. The thermal printer core comprises a first machine body (1 a) and a second machine body (1 b), wherein the first machine body (1 a) is detachably arranged on the second machine body (1 b) through a detaching mechanism, the first machine body (1 a) comprises a first frame (11 a), a rubber roller assembly (12 a) and a fixed knife (13 a), the rubber roller is rotatably arranged on the first frame (11 a), and the fixed knife (13 a) is arranged on the first frame (11 a);

the second machine body (1 b) comprises a second machine frame (11 b), a thermal printing head (15 b), a movable cutter assembly (14 b), a first transmission gear set (5) and a detaching mechanism, wherein the thermal printing head is arranged on the second machine frame (11 b), and grooves (16 b) for arranging rubber roll assemblies (12 a) are formed in two sides of the front end of the second machine frame (11 b);

the movable cutter assembly (14 b) is movably arranged on the second frame, at least one end of the movable cutter assembly is provided with a rack part (144), and the movable cutter assembly (14 b) is matched with the fixed cutter (13 a) to cut paper; the first transmission gear set (5) is arranged on one side of the second frame, an output gear (51) of the first transmission gear set (5) is meshed with a rack part (144) on one side of the movable cutter assembly (14 b), and the rubber roller assembly (12 a) is close to the thermal printing head (15 b) in a state that the first machine body (1 a) is arranged on the second machine body (1 b);

the device is characterized in that one side of the second frame (11 b) is rotatably provided with a swinging rod (2), and the top end of the swinging rod (2) can prop against the movable cutter assembly (14 b) and can drive the movable cutter assembly (14 b) to translate and return;

the detaching mechanism comprises

A rotating shaft (41 a) provided on the second frame in parallel with the longitudinal direction of the thermal head (15 b); the two ends of the first swing piece (4) and the second swing piece (4 a) which can drive the rubber roller assembly (12 a) to separate from the second machine body (1 b) are respectively arranged, and a first stress part (41) is formed on one side of the first swing piece (4);

a wrench (1) rotatably arranged on the second frame (11 b), a first force application part (11) matched with the first force receiving part (41) and a second force application part (12) matched with the bottom end of the swing rod (2) are formed on the inner side, and the outer end of the wrench extends outwards to form a handle part (14); and

a first reset piece (1 c) arranged on the second frame (11 b) and always forcing the rotating shaft (41 a) to keep an initial state;

the handle (14) of the wrench (1) is pressed, the first force application part (11) acts on the first force receiving part (41), the first swinging part (4) rotates, so that the rotating shaft (41 a) rotates, the second swinging part (4 a) rotates, the first swinging part (4) and the second swinging part (4 a) simultaneously drive two ends of the rubber roller assembly (12 a), the rubber roller assembly (12 a) is forced to be separated from the groove (16 b), the first rack (11 a) is separated from the second rack (11 b), meanwhile, the second force application part (12) of the wrench (1) acts on the bottom end of the swinging rod (2), and after the swinging rod (2) rotates, the top end of the swinging rod (2) drives the movable cutter assembly (14 b) to translate and return.

2. A thermal printer according to claim 1, wherein the wrench (1) has a third force application portion (13), the second frame (11 b) is provided with a first transmission gear set (5), a first motor (6) and a wheel frame (3), the first transmission gear set at least includes a driving gear (53), an intermediate gear (52) and an output gear (51), the driving gear (53) is in driving connection with the first motor (6), the intermediate gear (52) is a duplex gear and two ends of the intermediate gear are respectively engaged with the driving gear (53) and the output gear (51), the intermediate gear (52) is rotatably provided on a supporting shaft (31) of the wheel frame (3), the wheel frame (3) can rotate around a pivot and has a second force application portion (32), and the handle portion (14) of the wrench (1) is in a pressed state, the third force application portion (13) of the wrench (1) can drive the second force application portion (32) of the wheel frame (3), and further rotate the wheel frame (3), so that the intermediate gear (52) is disengaged from the driving gear (53).

3. The thermal printer core according to claim 2, wherein the second stress portion (32) and the supporting shaft (31) are respectively located at two sides of the pivot of the wheel frame (3), and a connection line between the stress point of the second stress portion (32) and the pivot and a connection line between the central axis of the supporting shaft (31) and the pivot form an acute angle.

4. A thermal printer cartridge according to claim 2, characterized in that said second frame (11 b) is provided with a second return element (2 c) which always forces the carriage (3) to remain in the initial position.

5. The thermal printer core according to claim 1, wherein the moving blade assembly (14 b) comprises a carrier plate (142) and a moving blade (141) disposed on the carrier plate (142), both ends of the carrier plate (142) are provided with rack portions (144), the second frame (11 b) is provided with a connecting shaft (512), the output gear (51) is disposed at one end of the connecting shaft (512), an auxiliary gear (511) engaged with the rack portions (144) is disposed at the other end of the connecting shaft (512), and the auxiliary gear (511) can synchronously drive the rack portions (144) with the output gear (51).

6. A thermal printer according to claim 5, wherein the rear end of the auxiliary gear has a cavity in which is located a third return member which acts on the auxiliary gear and always forces the auxiliary gear to move the rack portion away from the stationary blade.

7. The thermal printer core of claim 5, wherein a bar hole is formed on one side of the carrier plate near the rack portion, and the bottom end of the swing rod extends into the bar hole.

8. The thermal printer core of claim 7, wherein a stopper capable of limiting the swing amplitude of the swing lever is arranged on one side of the second frame close to the swing lever.