CN110561918A

CN110561918A - Thermal printer

Info

Publication number: CN110561918A
Application number: CN201910744202.XA
Authority: CN
Inventors: 王建立; 张敏; 林枫
Original assignee: NINGBO JINGXIN SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: NINGBO JINGXIN SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2019-12-13

Abstract

A thermal printer comprises a base, a motor, a transmission gear set, a printing head component, a bracket and a rubber roller, and is characterized in that the rubber roller is rotatably arranged on the bracket through a rotating shaft; a positioning shaft is elastically arranged in the direction parallel to the rotating shaft of the support, a limiting groove for the rotating shaft is arranged at the front end of the machine base, the port of the limiting groove is arranged upwards, and a positioning groove for the positioning shaft is arranged on the front end surface of the machine base; the uncovering mechanism comprises a shifting block, a wrench and a return spring, wherein the shifting block is driven to rotate under the rotation state of the wrench, so that the shifting block acts on the positioning shaft, the positioning shaft is separated from the positioning groove after being stressed, and the support is separated from the base. The positioning shaft is driven to be separated from the positioning groove by matching the wrench with the shifting block to realize the separation of the support and the machine base, the operation is convenient and fast, and the structure is simple and practical.

Description

Thermal printer

Technical Field

the invention relates to a thermal printer, which is applied to bill printing of cash dispensers and supermarket cash counters.

Background

Thermal printers are mostly arranged on automatic teller machines of banks and cash registers of supermarkets and are used for printing transaction receipts or tickets. A thermal printer generally has a casing in which a movement is installed, the movement including a printhead assembly, a base, and a paper cutter, wherein the printhead assembly is installed above the base, and the paper cutter is installed at one side of the base and the printhead assembly. A paper feeding passage is formed between the print head assembly and the frame, and the thermal printing paper passes through the paper feeding passage.

The upper end of a machine base of the thermal printer core is provided with a rubber roller, a motor is arranged in the machine base, and the motor drives the rubber roller to rotate through a transmission mechanism such as a gear. The printing head assembly comprises a printing head and a thermosensitive sheet, the thermosensitive sheet is arranged opposite to the rubber roller, and the thermosensitive sheet heats the thermosensitive printing paper to form characters and patterns.

Because the printing paper needs to be replaced frequently when the thermal printer works, the printing head needs to be separated from the base frequently, namely, the cover opening operation is carried out; and in the other case, the cover opening operation is also required when a paper jam is encountered. Consequently be provided with uncap mechanism so that uncap the operation on current printhead subassembly and the frame, nevertheless current uncap mechanism structure is complicated, causes thermal printer core manufacturing cost higher, and leads to uncap the operation difficulty, is unfavorable for beating the operation of beating printer paper and changing.

disclosure of Invention

the present invention is directed to provide a thermal printer with a cover that is easy to operate.

The technical scheme adopted by the invention for solving the technical problems is as follows: a thermal printer includes

A machine base;

the motor is arranged on the base;

The transmission gear set is arranged on the base and connected with the power output end of the motor;

The printing head assembly is arranged on the base;

The bracket is detachably arranged on the base through a cover opening mechanism;

the rubber roller can be rotatably arranged on the bracket and is close to the printing head assembly, and the rubber roller is provided with a driving gear meshed with the transmission gear set;

The rubber roller is rotatably arranged on the bracket through a rotating shaft; the bracket is elastically provided with a positioning shaft parallel to the rotating shaft,

the front end of the base is provided with a limiting groove for the rotating shaft to be arranged, the port of the limiting groove is arranged upwards, and the front end surface of the base is provided with a positioning groove for the positioning shaft to be arranged;

the cap opening mechanism comprises

the shifting block can be rotatably arranged on the base;

The spanner can be rotatably arranged on the base, and a wrenching part is formed at the outer end of the spanner; and

A reset spring which is arranged on the base and always forces the wrench to restore the original shape,

When the spanner is in a rotating state, the shifting block is driven to rotate, so that the shifting block acts on the positioning shaft, the positioning shaft is separated from the positioning groove after being stressed, and the support is separated from the base.

further, a clamping groove is formed in the wrench; the bracket is elastically provided with a fixed blade, the bracket is provided with a connecting rod parallel to the direction of the rotating shaft, the connecting rod is provided with a positioning block, the front end of the positioning block is convexly provided with a convex part clamped with the clamping groove, and the middle part of the positioning block is provided with an extrusion part abutting against the fixed blade; under the state that support and frame are connected, the pivot locate the spacing inslot, the location axle locate in the constant head tank, the convex part joint of locating piece is in the draw-in groove of spanner.

the connecting rod and the positioning shaft are respectively positioned at two sides of the rotating shaft. The connection is firmer by the up-and-down positioning.

The driving structure of the wrench and the shifting block is preferably set as follows: the inner end of the wrench is provided with a first gear tooth, and correspondingly, the shifting block is provided with a second gear tooth meshed with the first gear tooth.

in order to make the stirring more stable and effective, the base is provided with a stirring shaft, the stirring block is arranged at one end of the stirring shaft, and the other end of the stirring shaft is provided with a power-assisted block capable of stirring the positioning shaft.

furthermore, the positioning shaft is arranged on a mounting frame, two ends of the mounting frame are provided with hanging lugs which are sleeved at two ends of the rotating shaft, and the back of the mounting frame is provided with a reed so that the mounting frame and the support are elastically arranged.

Compared with the prior art, the invention has the advantages that: the positioning shaft is driven to be separated from the positioning groove by matching the wrench with the shifting block to realize the separation of the support and the machine base, the operation is convenient and fast, and the structure is simple and practical.

Drawings

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

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

fig. 3 is an exploded view from another perspective of fig. 2.

FIG. 4 is an exploded assembly view of the bracket, the rubber roller, the stationary blade and the connecting rod.

fig. 5 is a combination view of the shifting shaft, the wrench and the shifting block.

Fig. 6 is an exploded view from another perspective of fig. 5.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1, 2 and 3, the thermal printer in this embodiment includes a base 1, a motor 14, a transmission gear set 12, a print head assembly 11, a bracket 2, a rubber roller 21 and a release mechanism, wherein the motor 14 is disposed on the base 1, and the transmission gear set 12 is disposed on the base 1 and connected to a power output end of the motor; in this embodiment, two motors 14 are provided, two transmission gear sets 12 are provided and located on two sides of the rubber roller 21, respectively, and the print head assembly 11 is provided on the base 1.

The bracket 2 is detachably arranged on the base 1 through a release mechanism; the support 2 is elastically provided with a positioning shaft 52 parallel to the rotating shaft 51, specifically, as shown in fig. 4, the positioning shaft 52 is provided on the mounting frame 23, two ends of the mounting frame 23 are provided with hanging lugs 231 sleeved on two ends of the rotating shaft 51, and the back of the mounting frame 23 is provided with a spring 232 to elastically arrange the mounting frame 23 and the support 2.

The rubber roller 21 is rotatably provided on the frame 2 near the printhead assembly 11 by a rotating shaft 51, and the rubber roller 21 has a driving gear 211 engaged with the transmission gear set 12.

The front end of the machine base 1 is provided with a limiting groove 1a for the rotating shaft 51 to be arranged, the port of the limiting groove 1a is arranged upwards, and the front end surface of the machine base 1 is provided with a positioning groove 1b for the positioning shaft 52 to be arranged; the machine base 1 is provided with a movable blade 13,

Referring to fig. 5 and 6, the disengaging mechanism includes a shifting block 7, a wrench 3, a return spring 7b, a shifting shaft 54 and a power assisting block 7a, the shifting shaft 54 is rotatably disposed on the base 1, and the shifting block 7 and the power assisting block 7a are respectively disposed at two ends of the shifting shaft 54; the spanner 3 is rotatably arranged on the machine base 1 through a shaft pin, and a wrenching part 31 is formed at the outer end of the spanner 3; the reset spring 7b is arranged on the base 1 and always forces the wrench 3 to restore, the reset spring 7b in the embodiment adopts a torsion spring, one end of the reset spring 7b abuts against the shifting block 7, and the other end of the reset spring abuts against the inner wall of the base 1.

The inner end of the wrench 3 in this embodiment has a first gear tooth 32 and the pick 7 has a second gear tooth 71 which meshes with the first gear tooth 32.

The wrench 3 is provided with a clamping groove 33; the holder 2 is elastically provided with a fixed blade 22, and the fixed blade 22 cooperates with the movable blade 13 to cut paper. A connecting rod 53 is arranged on the bracket 2 in a direction parallel to the rotating shaft 51, one end of the connecting rod 53 is provided with a positioning block 4, the other end of the connecting rod 53 is provided with an auxiliary block 6, the front end of the positioning block 4 is convexly provided with a convex part 41 clamped with the clamping groove 33, and the middle part of the positioning block is provided with an extrusion part 42 abutted against the fixed blade 22; the auxiliary block 6 also has an auxiliary pressing portion 61 that abuts against the stationary blade 22. The link 53 and the positioning shaft 52 are respectively located at both sides of the rotation shaft 51.

Under the state that support 2 is connected with frame 1, pivot 51 locate spacing groove 1a in, location axle 52 locate the constant head tank 1b in, the convex part 41 joint of locating piece 4 is in the draw-in groove 33 of spanner 3.

Under the rotation state of the wrench 3, the shifting block 7 is driven to rotate, so that the shifting block 7 acts on the positioning shaft 52, the positioning shaft 52 is separated from the positioning groove 1b after being stressed, meanwhile, the convex part 41 of the positioning block 4 is separated from the clamping groove 33 of the wrench 3, and the bracket 2 is separated from the machine base 1.

During assembly, the rotating shaft 51 is aligned with the limiting groove 1a and pressed from top to bottom, the positioning shaft 52 is assembled in the positioning groove 1b, and meanwhile, the convex part 41 is firmly clamped with the clamping groove 33.

Claims

1. A thermal printer includes

A machine base (1);

A motor (14) arranged on the base (1);

The transmission gear set (12) is arranged on the base (1) and is connected with the power output end of the motor;

A print head assembly (11) arranged on the base (1);

A bracket (2) which is detachably arranged on the base (1) through a release mechanism;

the rubber roller (21) is rotatably arranged on the bracket (2) and is close to the printing head assembly (11), and the rubber roller (21) is provided with a driving gear (211) meshed with the transmission gear set (12);

The rubber roller (21) is rotatably arranged on the bracket (2) through a rotating shaft (51); the bracket (2) is elastically provided with a positioning shaft (52) parallel to the direction of the rotating shaft (51),

The front end of the machine base (1) is provided with a limiting groove (1a) for the rotating shaft (51) to be arranged, the port of the limiting groove (1a) is arranged upwards, and the front end surface of the machine base (1) is provided with a positioning groove (1b) for the positioning shaft (52) to be arranged;

the aforementioned disengagement mechanism comprises

the shifting block (7) can be rotatably arranged on the base (1);

A wrench (3) rotatably arranged on the base (1), wherein a wrenching part (31) is formed at the outer end of the wrench (3); and

A return spring (7b) which is arranged on the machine base (1) and always forces the wrench (3) to restore the original state,

Under the rotation state of the wrench (3), the shifting block (7) is driven to rotate, so that the shifting block (7) acts on the positioning shaft (52), the positioning shaft (52) is separated from the positioning groove (1b) after being stressed, and the support (2) is separated from the machine base (1).

2. Thermal printer according to claim 1, characterised in that said spanner (3) has a slot (33) on it; the support (2) is elastically provided with a fixed blade (22), the support (2) is provided with a connecting rod (53) parallel to the direction of the rotating shaft (51), the connecting rod (53) is provided with a positioning block (4), the front end of the positioning block (4) is convexly provided with a convex part (41) clamped with the clamping groove (33), and the middle part of the positioning block is provided with an extrusion part (42) abutted against the fixed blade (22); under the state that support (2) and frame (1) are connected, pivot (51) locate in spacing groove (1a), location axle (52) locate in constant head tank (1b), convex part (41) joint in draw-in groove (33) of spanner (3) of locating piece (4).

3. the thermal printer according to claim 2, wherein the link (53) and the positioning shaft (52) are located on both sides of the rotation shaft (51), respectively.

4. thermal printer according to claim 1, characterised in that said wrench (3) has a first toothing (32) at its inner end and, correspondingly, said block (7) has a second toothing (71) meshing with said first toothing (32).

5. the thermal printer according to claim 4, wherein the base (1) is provided with a shifting shaft (54), the shifting block (7) is provided at one end of the shifting shaft (54), and the other end of the shifting shaft (54) is provided with a power assisting block (7a) capable of shifting the positioning shaft (52).

6. The thermal printer according to claim 1, wherein the positioning shaft (52) is disposed on a mounting bracket (23), the mounting bracket (23) has two ends with hanging lugs (231) sleeved on two ends of the rotating shaft (51), and the back surface of the mounting bracket (23) is provided with a spring (232) to elastically arrange the mounting bracket (23) and the bracket (2).