CN214164488U

CN214164488U - Thermal printer core

Info

Publication number: CN214164488U
Application number: CN202022930906.7U
Authority: CN
Inventors: 蒋文柏; 谢泽昌
Original assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Current assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-09-10
Anticipated expiration: 2030-12-07

Abstract

The utility model provides a thermal printer core, includes frame, print head subassembly and rubber roll subassembly, and aforesaid rubber roll subassembly can be located on the frame with rotating and be close to the print head subassembly and arrange its characterized in that frame both sides have the race of supplying rubber roll subassembly both ends to rotate the setting, rubber roll subassembly is located in the frame through shirking the mechanism, shirk the mechanism and include pivot, driving plate, spanner and reset the piece. The two ends of the rotating shaft are respectively provided with a swinging plate, and the transmission plate is arranged at one end of the rotating shaft and is provided with a first gear tooth; the middle part of the wrench can be rotatably arranged on one side of the rack, one end of the wrench is provided with a second gear tooth which is meshed with the first gear tooth for transmission, and the other end of the wrench extends in the direction away from the paper feeding end of the rack to form a wrenching part. The wrench, the rotating shaft, the swinging plate and the driving plate are adopted to drive the structure, so that the pulling part extends in the direction away from the paper feeding end of the frame, and the paper loading at the paper feeding end cannot be interfered to change paper.

Description

Thermal printer core

Technical Field

The utility model relates to a printer device especially relates to a portable thermal printer.

Background

The existing Thermal printer generally comprises a frame, a motor, a transmission gear assembly, a printing Head assembly and a rubber roll which can be rotatably arranged on the frame, wherein a power input end of the transmission gear assembly is meshed with an active output gear of the motor, a power output end of the transmission gear assembly is meshed with the rubber roll gear 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 frame are arranged at two ends of the pressure spring support frame, two ends of the pressure spring respectively abut against the printing Head support and the pressure spring support frame, and the printing paper can be pressed on the surface of the rubber roll by the printing Head. 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 shaft groove for arranging the bearings is formed in the rack, the shaft groove is semicircular, and the bearings are always positioned in the shaft groove in a working state; when needing to feed paper, the rubber roller communicating bearing can be easily separated from the shaft groove. But has the following disadvantages: the bearing has larger range of play in the shaft 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 No. ZL201120357824.6 frame and rubber roll assembly structure and applied the thermal printer that has this assembly structure (the grant bulletin number is CN202271666U), the shaft inslot of frame is located through the jump ring of a special shape system to the bearing in this patent 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 hardly, guarantees the normal stable operation of rubber roll.

There is also an improved structure on the market, as shown in fig. 1 and fig. 2, the thermal printer core includes a motor 9a, a transmission gear set 91a, a frame 1a, a print head assembly 2a, a glue roller assembly 3a and a rotating plate 6a, the print head assembly is disposed on the frame 1a, the glue roller assembly 3a is rotatably disposed on the frame 1a, the rotating plate 6a is rotatably disposed on the frame 1a, a reset member composed of a spring leaf 12a and a compression spring 11a is disposed between the rotating plate 6a and the print head assembly 2a, the motor 9a transmits to the input gear 31a through the transmission gear set 91a to drive the glue roller assembly 3 to rotate, a pressing portion 61a is integrally formed on the edge of the rotating plate 6a, and the pressing portion 61a faces the paper feeding end 13a of the frame 1 a. The rubber roller assembly 3a can be separated from the frame 1a by applying force to the pressing part 61 a. This structure has the following disadvantages: firstly, the pressing part of the rotating plate is designed to be close to the paper feeding end of the frame, which brings inconvenience to the operation of changing the paper for loading and reduces the impact resistance of the whole machine; secondly, the existing movement adopts the elastic plate to reset, and due to the large reaction, the pushing-away force of the clamping hooks on the two sides is large, so that when the buckling is carried out, a large pressing force is needed, the operation hand feeling experience is not good, and the buckling can be carried out only by respectively pressing the left and the right with two hands.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a rubber roll subassembly shirks to foretell technical current situation and provides a thermal printer core that does not have the influence to adorning paper and trade paper.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a thermal printer core, includes frame, print head subassembly and rubber roll subassembly, and aforementioned frame one side forms the paper feed end, and aforementioned print head subassembly is located on the paper feed end of frame, and aforementioned rubber roll subassembly can be located in the frame with rotating and be close to the print head subassembly and arrange, its characterized in that frame both sides have the axle box that supplies rubber roll subassembly both ends to rotate and set up, rubber roll subassembly is located in the frame through shirking the mechanism, shirk the mechanism and include

The rotating shaft is rotatably arranged on the frame in the length direction of the parallel rubber roll component, two ends of the rotating shaft are respectively provided with a swinging plate, the swinging plates are arranged close to the shaft groove of the frame, the front end of each swinging plate is provided with a limiting part for limiting the end part of the rubber roll component to be separated from the shaft groove and a driving part for driving the end part of the rubber roll component to be separated from the shaft groove, and a groove is formed between the limiting part and the driving part;

the transmission plate is arranged at one end of the rotating shaft and is provided with a first gear tooth;

the middle part of the wrench can be rotatably arranged on one side of the rack, one end of the wrench is provided with a second gear tooth which is meshed with the first gear tooth for transmission, and the other end of the wrench extends in the direction away from the paper feeding end of the rack to form a wrenching part; and

and the reset piece always forces the swing plate to keep the state of limiting the end part of the rubber roller assembly to be separated from the shaft groove.

Furthermore, a smooth inclined surface for the rubber roller assembly to smoothly enter the shaft groove is formed on the upper end surface of the limiting part. During assembly, the rubber roller assembly can be guided in along the way, and top collision is avoided.

Preferably, the reset piece is a set of torsion spring arranged at one end of the rotating shaft, one end of the torsion spring is connected with the adjacent swinging plate, and the other end of the torsion spring is abutted against the inner wall of the rack. The elasticity of the torsion spring is small, the rubber roller component cannot be too violent when being ejected, and the assembly can be operated by one hand due to small acting force.

Further, the frame include side board portion, paper guide portion and installation department, aforementioned side board portion be two and form respectively in the installation department both sides, aforementioned paper guide portion forms the paper feed end between the side board portion with the slope, the tip of aforementioned paper guide portion has breach or the through-hole that supplies the swing board to stretch out with the side board inboard, spanner and driving plate are located the side board portion outside, beat and be equipped with compression spring between printer head assembly and the installation department. All parts do not interfere with each other, and are compact and reasonable.

Furthermore, the printing head assembly comprises a printing head support and a thermal printing head arranged in the middle of the mounting surface of the printing head support, and one side of the driving part of the swinging plate is abutted and limited with two sides of the printing head support.

Compared with the prior art, the utility model has the advantages of: because the spanner, the rotating shaft, the swinging plate and the driving plate driving structure are adopted, the pulling part is far away from the direction extension design of the paper feeding end of the frame, the paper loading of the paper feeding end can not be interfered, the paper is replaced, the working pressure of the printing head assembly and the rubber roller assembly is more uniform, the work is more stable and reliable, and the operation that the rubber roller assembly is separated from the frame is more convenient.

Drawings

Fig. 1 is a schematic diagram of a thermal printer core in the prior art.

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

FIG. 3 is a schematic structural diagram of an embodiment.

FIG. 4 is a schematic structural diagram of another view angle according to the embodiment.

Fig. 5 is an exploded view of the embodiment.

FIG. 6 is a schematic structural diagram after the glue roller assembly is hidden in the embodiment.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 3, 4 and 5, the thermal printer core in this embodiment includes a motor 9, a transmission gear set 91, a touch switch 15, a frame 1, a print head assembly 2 and a rubber roller assembly 3, a paper feeding end is formed on one side of the frame 1, the print head assembly 2 is disposed on the paper feeding end of the frame 1, the print head assembly 2 includes a print head bracket 21 and a thermal print head 22 disposed in the middle of a mounting surface of the print head bracket 21, the touch switch 15 is disposed on the frame, and when the rubber roller assembly 3 is detached from the frame, power off is performed.

The rubber roller component 3 is rotatably arranged on the frame 1 and close to the printing head component 2, the rubber roller component 3 comprises a rubber roller shaft 33, a rubber roller 31 arranged in the middle of the rubber roller shaft 33 and rubber roller bearings 32 arranged at two ends, and an input gear 34 is further arranged at one end of the rubber roller shaft 33.

The two sides of the frame 1 are provided with shaft grooves 17 for the two ends of the rubber roller component 3 to rotate, the rubber roller component 3 is arranged on the frame 1 through a detaching mechanism, and the motor 9 drives the input gear 34 through the transmission gear set 91 so as to drive the rubber roller 31 to rotate.

Referring to fig. 6, the frame 1 in this embodiment includes two side plates 11, a paper guide 12 and a mounting portion 13, the two side plates 11 are respectively formed on two sides of the mounting portion 13, a shaft groove 17 is formed on the upper end of the side plate 11, the paper guide 12 is obliquely formed between the side plates 11 to form a paper feeding end, a notch 121 or a through hole for the swing plate 8 to extend is formed between the end of the paper guide 12 and the inner side of the side plate 11, the wrench 5 and the transmission plate 7 are located on the outer side of the side plate 11, and a compression spring 14 is provided between the print head bracket 21 and the mounting portion 13. One side of the driving portion 82 of the swing plate 8 abuts against both sides of the head holder 21 to be restricted.

Referring to fig. 5, the detaching mechanism in this embodiment includes a rotating shaft 6, a transmission plate 7, a wrench 5, and a reset member.

The rotating shaft 6 is rotatably arranged on the frame 1 parallel to the length direction of the rubber roller assembly 3, the two ends of the rotating shaft are respectively provided with a swinging plate 8, the swinging plates 8 are arranged close to the shaft groove 17 of the frame 1, the front end of the swinging plate 8 is provided with a limiting part 81 for limiting the end part of the rubber roller assembly 3 to be separated from the shaft groove 17 and a driving part 82 for driving the end part of the rubber roller assembly 3 to be separated from the shaft groove 17, and a groove 83 is formed between the limiting part 81 and the driving part 82; the upper end surface of the limiting part 81 is formed with a smooth inclined surface 84 for the rubber roller assembly 3 to smoothly enter the shaft groove 17.

The transmission plate 7 is disposed at one end of the rotation shaft 6 and has first gear teeth 71. The middle part of the wrench 5 is rotatably arranged at one side of the frame 1, one end of the wrench is provided with a second gear tooth 52 which is meshed with the first gear tooth 71 for transmission, and the other end of the wrench extends away from the paper feeding end of the frame 1 to form a wrenching part 51.

The reset piece 61 always forces the swing plate 8 to maintain a state of restricting the end of the rubber roller assembly 3 from escaping from the shaft groove 17. The reset member 61 in this embodiment is a set of torsion springs disposed at one end of the rotating shaft 6, one end of the torsion spring is connected to the adjacent swinging plate 8, and the other end of the torsion spring abuts against the inner wall of the rack 1.

When the rubber roller assembly 3 needs to be disengaged, a finger presses the pulling part 51 of the wrench, the second gear 52 drives the first gear 71, so as to drive the transmission plate 7, the rotating shaft 6 and the swinging plate 8 to turn over simultaneously, the limiting part 81 tilts upwards, meanwhile, the driving part 82 drives the rubber roller assembly 3 to bounce, the finger is loosened, the resetting part 61 acts on the rotating shaft 6, the swinging plate 8 resets, and the rubber roller assembly 3 is already positioned on the smooth inclined surface 84.

During assembly, the rubber roller bearing position of the rubber roller assembly 3 can be pressed into the shaft groove 17 along the smooth inclined surface 84 by one hand against the elastic force of the reset piece 61, and the assembly can be finished. The existing movement adopts an elastic plate to reset, and due to the large reaction, the pushing force of the clamping hooks on two sides is large, so that when the movement is buckled, a large pressing force is needed, the operation hand feeling experience is not good, and the movement can be buckled only by respectively pressing left and right with two hands.

Claims

1. The utility model provides a thermal printer core, includes frame (1), beats printer head assembly (2) and rubber roll subassembly (3), and aforementioned frame (1) one side forms the paper feed end, and aforementioned printer head subassembly (2) are located on the paper feed end of frame (1), and aforementioned rubber roll subassembly (3) can be rotationally located on frame (1) and are close to printer head subassembly (2) and arrange, its characterized in that frame (1) both sides have and supply rubber roll subassembly (3) both ends to rotate axle socket (17) that set up, rubber roll subassembly (3) are located on frame (1) through shirking the mechanism, shirking the mechanism include that

A rotating shaft (6), the length direction of the parallel rubber roller assembly (3) can be rotatably arranged on the frame (1), two ends of the rotating shaft are respectively provided with a swinging plate (8), the swinging plate (8) is arranged close to a shaft groove (17) of the frame (1), the front end of the swinging plate (8) is provided with a limiting part (81) for limiting the end part of the rubber roller assembly (3) to be separated from the shaft groove (17) and a driving part (82) for driving the end part of the rubber roller assembly (3) to be separated from the shaft groove (17), and a groove (83) is formed between the limiting part (81) and the driving part (82);

a transmission plate (7) which is arranged at one end of the rotating shaft (6) and is provided with a first gear tooth (71);

the middle part of the wrench (5) is rotatably arranged on one side of the rack (1), one end of the wrench is provided with a second gear tooth (52) which is meshed with the first gear tooth (71) for transmission, and the other end of the wrench extends in the direction away from the paper feeding end of the rack (1) to form a wrenching part (51); and

the reset piece (61) always forces the swing plate (8) to keep the state of limiting the end part of the rubber roller component (3) to be separated from the shaft groove (17).

2. A thermal printer movement according to claim 1, wherein a smooth inclined surface (84) for allowing the glue roller assembly (3) to smoothly enter the shaft groove (17) is formed on an upper end surface of the regulating portion (81).

3. A thermal printer movement according to claim 1, characterised in that the return element (61) is a torsion spring fitted to one end of the shaft (6), one end of the torsion spring being connected to the adjacent oscillating plate (8) and the other end abutting against the inner wall of the frame (1).

4. A thermal printer core according to claim 1, wherein the frame (1) includes two side plates (11), two paper guides (12) and a mounting portion (13), the two side plates (11) are formed on two sides of the mounting portion (13), the two paper guides (12) are formed obliquely between the side plates (11) to form a paper feeding end, a notch (121) or a through hole for the swinging plate (8) to extend out is formed between the end of the paper guide (12) and the inner side of the side plate (11), the wrench (5) and the driving plate (7) are located on the outer side of the side plate (11), and a compression spring (14) is arranged between the print head assembly (2) and the mounting portion (13).

5. A thermal printer core according to claim 4, characterised in that the printhead assembly (2) comprises a printhead carrier (21) and a thermal printhead (22) arranged in the middle of the mounting surface of the printhead carrier (21), and one side of the driving part (82) of the oscillating plate (8) is limited against both sides of the printhead carrier (21).