CN112297645B

CN112297645B - Thermal printer core

Info

Publication number: CN112297645B
Application number: CN202011326250.6A
Authority: CN
Inventors: 蒋文柏
Original assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Current assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2024-07-19
Anticipated expiration: 2040-11-24
Also published as: CN112297645A

Abstract

The thermal printer core comprises a frame, a printing head assembly and a rubber roller assembly, and is characterized in that shaft grooves for the two ends of the rubber roller assembly to rotate are formed in two sides of the frame, a rotating plate is rotatably arranged on the frame, the rotating plate comprises a connecting part which is arranged in parallel with the printing head support and a swinging part which is arranged on one side of the connecting part, and the swinging part is arranged close to the shaft grooves of the frame; the connecting part is positioned at one side of the printing head bracket and is provided with an elastic piece between the printing head bracket and the back surface of the printing head bracket, and the elastic piece always forces the thermal printing head to be close to the rubber roller assembly. The connecting part of the rotating plate replaces the original mounting plate for mounting the elastic piece, and meanwhile, the elastic piece is utilized to realize the resetting of the rotating plate, so that the compressing design of the printing head assembly is combined with the resetting of the rotating plate, the structure is more compact, and the assembly is facilitated.

Description

Thermal printer core

Technical Field

The present invention relates to printer devices, and more particularly 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 roller which can be rotationally arranged on the 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 frame, and the 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 tightly press 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 frame is provided with a shaft groove for the bearings to be arranged, the shaft groove is in a semicircular shape, and the bearings are always positioned in the shaft groove in the working state; when paper is needed to be fed, the rubber roller communication bearing can be easily separated from the shaft groove. However, the following disadvantages exist: the bearing has larger movement amplitude in the shaft 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 a Chinese patent application No. ZL201120357824.6, namely a frame and rubber roller assembly structure and a thermal printer (an authorized publication No. CN 202271666U) with the assembly structure, wherein a bearing in the patent is arranged in a shaft groove of the 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 an elastic limiting part in the use process, so that the normal and stable operation of the rubber roller is ensured.

Furthermore, the inventor also develops an improved structure, see 'rubber roller component mounting structure' of China patent No. ZL201710535434.5 (issued publication No. CN 107284048B), which realizes a detaching design through a shaft lever, a first rotating shaft, a second rotating shaft, a swinging piece and a spanner, but the whole design is complicated, the assembly has a certain difficulty, the detached rubber roller component can be completely ejected from a frame, one of the ejected rubber roller component is not easy to control, and the other rubber roller component is inconvenient to install again.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a thermal printer core which is compact in design and convenient to assemble, aiming at the state of the art.

The second technical problem to be solved by the invention is to provide a thermal printer core which is easy to control after the rubber roller component is detached.

The technical scheme adopted by the invention for solving the first technical problem is as follows: the machine core of the thermal printer comprises a frame, a printing head assembly and a rubber roller assembly, wherein the printing head assembly is arranged on the frame, and the rubber roller assembly can be rotationally arranged on the frame and is close to the printing head assembly; the rotating plate comprises a connecting part which is arranged in parallel with the printing head bracket and a swinging part which is arranged at least at one side of the connecting part, and the swinging part is arranged close to a shaft groove of the frame; an elastic piece is arranged between one side of the printing head support and the back of the printing head support and is used for always forcing the thermal printing head to be close to the rubber roller assembly; the front end of the swinging part is provided with a limiting part for limiting the end part of the rubber roller assembly to be separated from the shaft groove and a driving part for driving the end part of the rubber roller assembly to be separated from the shaft groove, a groove is formed between the limiting part and the driving part, and the swinging part is laterally extended outwards to form a pressing part which can enable the rotating plate to rotate after being pressed;

In the initial state, two ends of the rubber roller assembly can be rotatably arranged on the shaft groove, and the limiting part limits the end part of the rubber roller assembly in the shaft groove; after the pressing part presses the stress, the rotating plate rotates, the limiting part overturns to release the limit of the end part of the rubber roller assembly, the driving part acts on the end part of the rubber roller assembly and drives the rubber roller assembly to be separated from the shaft groove, and meanwhile, the elastic part instantaneously deforms.

Preferably, the two sides of the connecting part are respectively provided with swinging parts, each swinging part is provided with a limiting part and a driving part, and at least one swinging part is provided with a pressing part.

Preferably, the swinging part is rotatably provided inside the frame via a connecting shaft.

Further, the frame include bottom plate portion and shaping in the installation department of bottom plate portion both sides, the connecting axle set up on the installation department, the print head support both sides locate the installation department inboard through the connecting pin rotationally, and, print head support at least one end lateral extension has the extension, correspondingly, the installation department shaping has the spacing hole that supplies the aforesaid extension to stretch into, the aforesaid extension can be at spacing downthehole activity and obtain spacingly.

Preferably, the connecting part, the swinging part and the pressing part are integrated into a whole or are connected and assembled into a whole after being designed separately.

Further, the port of the shaft groove is arranged obliquely upwards. Can make the rubber roller assembly smoothly enter the shaft groove.

The invention solves the second technical problem by adopting the technical proposal that: the rubber roller assembly can be rotationally arranged on the rubber roller support, and two ends of the rubber roller support are rotationally connected with the frame. After the rubber roller assembly is disconnected, the rubber roller support is automatically driven to turn over, so that the rubber roller support is restrained from being sprung up greatly, the control is easy, and after the printing paper is assembled, the rubber roller support is only pressed, so that the operation is convenient.

Further, the paper feeding end of the frame is obliquely provided with a paper guide plate, two sides of the paper guide plate are respectively extended with a pin shaft part, and correspondingly, two ends of the rubber roller support are respectively provided with a strip-shaped shaft hole matched with the pin shaft part. The pin shaft part can transversely move in the strip-shaped shaft hole, so that the opening range of the rubber roller assembly is improved, and paper loading or printing paper arrangement operation is facilitated.

Compared with the prior art, the invention has the advantages that: the connecting part of the rotating plate replaces the original mounting plate for mounting the elastic piece, and meanwhile, the elastic piece is utilized to realize the resetting of the rotating plate, so that the compressing design of the printing head assembly is combined with the resetting of the rotating plate, the structure is more compact, and the assembly is facilitated.

Drawings

FIG. 1 is a schematic diagram of an embodiment

Fig. 2 is an exploded view of an embodiment.

Fig. 3 is a schematic view of another view structure according to an embodiment.

FIG. 4 is an assembly diagram of a rubber roller support and a paper guide plate in an embodiment

Fig. 5 is a state diagram of the embodiment after the rubber roller assembly is detached.

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 frame 1, a motor 6, a transmission gear set 61, a print head assembly 3 and a rubber roller assembly 2, the print head assembly 3 is disposed on the frame 1, the rubber roller assembly 2 is rotatably disposed on the frame 1 and is disposed near the print head assembly 3, an input gear 211 is disposed at one end of the rubber roller assembly 2, and the motor 6 drives the rubber roller assembly 2 to rotate through the transmission gear set 61.

The two sides of the frame 1 are provided with shaft grooves 14 for the two ends of the rubber roller assembly 2 to rotate, and the ports of the shaft grooves 14 are obliquely upwards arranged. The printhead assembly 3 includes a printhead bracket 32 and a thermal printhead 31 disposed on the printhead bracket 32, and both ends of the printhead bracket 32 are movably disposed on the frame 1.

A rotating plate 4 is rotatably arranged on the frame 1, the rotating plate 4 comprises a connecting part 42 arranged in parallel with the printing head bracket 32 and a swinging part 41 arranged at least on one side of the connecting part 42, and the swinging part 41 is arranged close to the shaft groove 14 of the frame 1; the connecting part 42 is positioned at one side of the print head bracket 32 and an elastic piece 35 is arranged between the connecting part and the back of the print head bracket 32, the elastic piece 35 always forces the thermal print head 31 to be close to the rubber roller assembly 2, and the elastic piece 35 adopts a tower type spring in the embodiment; the front end of the swinging part 41 is provided with a limiting part 411 for limiting the end part of the rubber roller assembly 2 to be separated from the shaft groove 14 and a driving part 412 for driving the end part of the rubber roller assembly 2 to be separated from the shaft groove 14, a groove is formed between the limiting part 411 and the driving part 412, and the swinging part 41 is laterally and outwards extended with a pressing part 43 which can rotate the rotating plate 4 after being pressed; the swing portions 41 are provided on both sides of the connection portion 42 in the present embodiment, respectively, each swing portion 41 is formed with a restricting portion 411 and a driving portion 412, and one of the swing portions 41 has a pressing portion 43. The swinging portion 41 is rotatably provided inside the frame 1 via the connection shaft 33.

The connecting portion 42, the swinging portion 41, and the pressing portion 43 in this embodiment are an integral piece, and are strong and easy to manufacture.

The frame 1 in this embodiment includes a bottom plate portion 12 and mounting portions 11 formed on both sides of the bottom plate portion 12, a connecting shaft 33 is disposed on the mounting portions 11, both sides of a print head bracket 32 are rotatably disposed on the inner sides of the mounting portions 11 through connecting pins, at least one end of the print head bracket 32 is laterally extended with an extension portion 34, correspondingly, the mounting portion 11 is formed with a limiting hole 13 into which the extension portion 34 extends, and the extension portion 34 can move in the limiting hole 13 and be limited. The connecting shaft and the connecting pin in this embodiment share one component. The touch switch 1a is arranged on one side of the mounting part 11, a touch head of the touch switch 1a is arranged close to the rubber roller assembly 2, and when the rubber roller assembly 2 is disconnected, a trigger signal is generated to cut off a circuit.

As shown in fig. 4, the rubber roller assembly 2 in this embodiment is rotatably disposed on a shaft hole 222 of the rubber roller support 22, two ends of the rubber roller support 22 are rotatably connected with the frame 1, specifically, a paper feeding end of the frame 1 is obliquely provided with a paper guide plate 5, two sides of the paper guide plate 5 are respectively extended with a pin shaft portion 51, and correspondingly, two ends of the rubber roller support 22 are respectively provided with a bar-shaped shaft hole 221 matched with the pin shaft portion 51.

As shown in fig. 1, in the initial state, both ends of the rubber roll assembly 2 are rotatably provided on the shaft groove 14, and the limiting part 411 limits the end of the rubber roll assembly 2 in the shaft groove 14; referring to fig. 5, after the pressing portion 43 presses the force, the rotating plate 4 rotates, the limiting portion 411 overturns to release the limit on the end portion of the rubber roll assembly 2, the driving portion 412 acts on the end portion of the rubber roll assembly 2 and drives the rubber roll assembly 2 to separate from the shaft groove 14, the rubber roll support 22 overturns, the bar-shaped hole 221 of the rubber roll support 22 slides down along the pin shaft portion to the other end, and further the rubber roll assembly 2 is separated from the frame 1. At the same time, the elastic member 35 is deformed instantaneously, the printhead assembly 3 is turned over and presses the printing paper to be weakened instantaneously, and at this time, the printing paper can be loaded or sorted.

In the past thermal printer core, the design that compresses tightly of printing head subassembly adopts elastic component to offset with a mounting panel of frame to realize, shirk the mechanism and adopt the torsional spring to realize resetting, and this embodiment then does not have the mounting panel, does not also have the torsional spring, and replace the mounting panel with the connecting portion of rotor plate, utilize the elastic component to realize the reset of rotor plate simultaneously, the structure is compacter, do benefit to the assembly, simultaneously, the rubber roll subassembly is released the back, automatic drive rubber roll support upset, consequently receive the restraint of rubber roll support can not bounce very greatly, easy control, after the printing paper assembly, as long as press the rubber roll support can, the simple operation.

Claims

1. The thermal printer movement comprises a frame (1), a printing head assembly (3) and a rubber roller assembly (2), wherein the printing head assembly (3) is arranged on the frame (1), the rubber roller assembly (2) can be rotatably arranged on the frame (1) and is close to the printing head assembly (3), and the thermal printer movement is characterized in that shaft grooves (14) for the rotation of two ends of the rubber roller assembly (2) are formed in two sides of the frame (1), the printing head assembly (3) comprises a printing head bracket (32) and a thermal printing head (31) arranged on the printing head bracket (32), and two ends of the printing head bracket (32) can be movably arranged on the frame (1); a rotating plate (4) is rotatably arranged on the frame (1), the rotating plate (4) comprises a connecting part (42) which is arranged in parallel with the printing head bracket (32) and a swinging part (41) which is arranged at least at one side of the connecting part (42), and the swinging part (41) is arranged close to a shaft groove (14) of the frame (1); the connecting part (42) is positioned at one side of the printing head bracket (32) and an elastic piece (35) is arranged between the connecting part and the back of the printing head bracket (32), and the elastic piece (35) always forces the thermal printing head (31) to be close to the rubber roller assembly (2); the front end of the swinging part (41) is provided with a limiting part (411) for limiting the end part of the rubber roller assembly (2) to be separated from the shaft groove (14) and a driving part (412) for driving the end part of the rubber roller assembly (2) to be separated from the shaft groove (14), a groove is formed between the limiting part (411) and the driving part (412), and the swinging part (41) is laterally and outwards extended with a pressing part (43) which can rotate the rotating plate (4) after being pressed;

In the initial state, two ends of the rubber roller assembly (2) are rotatably arranged on the shaft groove (14), and the limiting part (411) limits the end part of the rubber roller assembly (2) in the shaft groove (14); after the pressing part (43) presses the stress, the rotating plate (4) rotates, the limiting part (411) overturns to release the limit on the end part of the rubber roller assembly (2), the driving part (412) acts on the end part of the rubber roller assembly (2) and drives the rubber roller assembly (2) to be separated from the shaft groove (14), and meanwhile, the elastic piece (35) deforms instantaneously;

Swing parts (41) are arranged on two sides of the connecting part (42), a limiting part (411) and a driving part (412) are formed on each swing part (41), and at least one swing part (41) is provided with a pressing part (43);

The swinging part (41) is rotatably arranged at the inner side of the frame (1) through a connecting shaft (33);

The frame (1) comprises a bottom plate part (12) and mounting parts (11) formed on two sides of the bottom plate part (12), the connecting shafts (33) are arranged on the mounting parts (11), two sides of the printing head support (32) can be rotatably arranged on the inner side of the mounting parts (11) through connecting pins, at least one end of the printing head support (32) transversely extends to form an extension part (34), correspondingly, the mounting parts (11) are formed with limiting holes (13) for the extension parts (34) to extend into, and the extension parts (34) can move in the limiting holes (13) and are limited;

The rubber roller assembly (2) is rotatably arranged on the rubber roller support (22), and two ends of the rubber roller support (22) are rotatably connected with the frame (1).

2. The thermal printer movement according to claim 1, characterized in that the paper feeding end of the frame (1) is obliquely provided with a paper guide plate (5), two sides of the paper guide plate (5) are respectively extended with a pin shaft portion (51), and correspondingly, two ends of the rubber roller support (22) are respectively provided with a bar-shaped shaft hole (221) matched with the pin shaft portion (51).

3. A thermal printer cartridge according to claim 1, wherein the connecting portion (42), the swinging portion (41) and the pressing portion (43) are integrally formed or integrally formed by separate design.

4. A thermal printer cartridge according to claim 1, characterized in that the ports of the shaft slots (14) are arranged obliquely upwards.