CN212171695U

CN212171695U - Thermal printer

Info

Publication number: CN212171695U
Application number: CN202020554079.3U
Authority: CN
Inventors: 王建立; 张敏; 林枫
Original assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Current assignee: NINGBO JINGXIN TECHNOLOGY CO LTD
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-12-18
Anticipated expiration: 2030-04-15

Abstract

A thermal printer comprises a base frame, a support, a printing head assembly and a rubber roller, wherein the printing head assembly is arranged on the base frame, the rubber roller can be rotatably arranged on the support, and the support can be detachably arranged on the base frame; the automatic paper feeding and printing device is characterized in that a first protection piece and a second protection piece are respectively arranged on the two sides of the rubber roller of the support, a rotating gap is formed between the first protection piece and the rubber roller, and the outer end faces of the first protection piece and the second protection piece can be in contact with an adhesive surface of a bottomless paper label in a paper feeding and printing state. When the printer works, the backing paper-free label is firstly contacted with the first protection piece and the second protection piece, and other parts such as the fixed cutter and the paper pressing plate can not be adhered with viscose glue, so that the service life of the fixed cutter can be prolonged, and normal printing can be guaranteed.

Description

Thermal printer

Technical Field

The utility model relates to a thermal printer is applied to cash dispenser, supermarket and receives the bill of cash desk and prints.

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 includes a casing, a core is installed in the casing, and the core includes a printhead assembly, a base frame, a support, a rubber roller, and a paper cutting knife, wherein the printhead assembly is installed on the base frame, and the paper cutting knife is installed on one side of the base frame and the printhead assembly. The rubber roller can be rotatably arranged on the support, the support can be detachably arranged on the base frame, a paper feeding channel is formed between the printing head assembly and the base frame, and the thermal printing paper penetrates through the paper feeding channel. The printing motor drives the rubber roller to rotate through the transmission gear set. 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.

At present, backing paper-free labels are more and more, and in the using process, the adhesive on the backing paper-free labels is very easy to adhere to other components such as a cutter, a paper pressing plate and the like and adhere to the cutter, so that the service life of the cutter is influenced, and the adhesive is adhered to other components such as the paper pressing plate and the like, so that the normal printing is influenced; secondly, bed frame one side is equipped with the gear cover, and the inboard shaping of gear cover has a plurality of gear shafts, and the drive gear group of constituteing by a plurality of gears is located on the gear shaft and is located the installation area between gear cover and the bed frame in, and this kind of design exists following not enoughly: firstly, the base frame is made of common plastic materials, and the strength and the heat conductivity are poor; secondly, when the gear cover is assembled, the positions of the corresponding holes of the gear shaft and the base frame need to be aligned, the requirement on the assembling precision of the gear cover is high, the accumulated error of a plurality of gear shafts is large, and the transmission precision of the transmission gear set and the output gear on the output shaft of the printing motor is difficult to guarantee. There is a need for improvement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to foretell technical current situation and provide a thermal printer on cutter or other parts are difficult for gluing to the viscose on no base paper label.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a thermal printer comprises a base frame, a support, a printing head assembly and a rubber roller, wherein the printing head assembly is arranged on the base frame, the rubber roller can be rotatably arranged on the support, and the support can be detachably arranged on the base frame; the automatic paper feeding and printing device is characterized in that a first protection piece and a second protection piece are respectively arranged on the two sides of the rubber roller of the support, a rotating gap is formed between the first protection piece and the rubber roller, and the outer end faces of the first protection piece and the second protection piece can be in contact with an adhesive surface of a bottomless paper label in a paper feeding and printing state.

Further, the support has built-in groove and is the bar, including first lateral part, second lateral part and the connecting portion that is located first lateral part and second lateral part both ends, the rubber roll can locate on aforementioned connecting portion and be located the port of built-in groove with rotating, the up end on the first lateral part is equipped with the stationary knife, first protection piece locate on the first lateral part and outer terminal surface salient in first lateral part, second protection piece locate on the second lateral part and salient in the second lateral part.

The mounting structure of the first protector is preferably designed as follows: the front end of the first side part is provided with an inserting part, and correspondingly, the inner side of the first protective piece is provided with a slot which is inserted and matched with the inserting part.

The bracket is elastically provided with a paper pressing plate which is positioned between the rubber roller and the second side part, and the paper pressing plate is provided with a third protection piece which protrudes out of the outer end surface of the paper pressing plate and has a rotating gap with the rubber roller. The paper pressing plate is used for pressing printing paper, and the third protecting piece can prevent the paper pressing plate from being adhered with viscose glue, so that the normal printing is ensured.

The pressure paper board locate on the support through the connecting axle, have the arc hole that supplies the connecting axle wobbling on the connecting portion, be equipped with the shell fragment in the built-in inslot of support, this shell fragment one end offsets with the support inner wall, and the other end then offsets with the inboard of pressure paper board, the rubber roll locate on the support through gluing the roller axle with rotating, pressure paper board one end still has the cover and locates the go-between on the gluey roller axle. The paper pressing plate swings along the arc-shaped hole by taking the rubber roll shaft as the center.

The mounting of the third protector is preferably set as follows: the connecting shaft penetrates through the paper pressing plate, a positioning block is arranged on the paper pressing plate, and the third protecting piece is provided with a cavity for the connecting shaft to penetrate through and a positioning hole matched with the positioning block.

Preferably, at least one of the first protection member and the second protection member is made of a silicone material.

Further, the printer further comprises

A first gear cover disposed on one side of the base frame, an

The first transmission gear set is arranged in the mounting area between the first gear cover and the base frame;

the base frame is made of metal alloy materials, a plurality of first gear shafts are formed on one side of the base frame, and gears on the first transmission gear set are arranged on the first gear shafts and can rotate.

First gear shaft integrated into one piece is on alloy material's bed frame, and first gear shaft accumulative error is less on the bed frame, and the transmission precision improves, and the bulk strength increase is difficult for rupture or damage.

One side of the base frame is provided with a first mounting arm, the first gear shaft is formed on the first mounting arm, the inner side of the first mounting arm is provided with a printing motor, an output shaft of the printing motor is provided with a first output gear, and the first output gear is in meshing transmission connection with the power input end of the first transmission gear set; and the shell of the printing motor is clung to the inner side surface of the first mounting arm. The heat of the printing motor is transferred to the base frame made of alloy materials through the metal shell, and the purpose of rapid heat dissipation is achieved.

Further, a second mounting arm is arranged on the other side of the base frame, a cutting motor is arranged on the inner side of the second mounting arm, a second gear cover is arranged on the outer side of the second mounting arm, a second transmission gear set is arranged in the inner space between the second mounting arm and the second gear cover, a second output gear is arranged on an output shaft of the cutting motor, and the second output gear is in meshing transmission connection with a power input end of the second transmission gear set; the power output end of the second transmission gear set is meshed with a rack part on the tool rest for transmission, and the movable tool is arranged on the tool rest; and the shell of the cutting motor is clung to the inner side surface of the second mounting arm. The heat of the cutting motor is transferred to the base frame made of alloy materials through the metal shell, and the purpose of rapid heat dissipation is achieved.

Compared with the prior art, the utility model has the advantages of: after first protection piece and second protection piece were loaded to the support, printer during operation, no backing paper label earlier with first protection piece and second protection piece contact, other parts just can not the adhesion viscose on stationary knife and the nipper, are favorable to improving stationary knife life-span and guarantee normal printing.

Drawings

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

Fig. 2 is an exploded view of the embodiment.

Fig. 3 is an exploded assembly view of the base portion from another perspective.

Fig. 4 is an enlarged assembly exploded view of a part of the bracket.

Fig. 5 is an enlarged view of the first protector from another perspective in fig. 4.

Fig. 6 is an enlarged view of the third protector in fig. 4 from another perspective.

Detailed Description

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

Referring to fig. 1, 2 and 4, the thermal printer in this embodiment includes a base frame 1, a support 2, a printhead assembly 7c, a rubber roller 6, a printing motor 4, a cutting motor 4a, a stationary blade 9, a movable blade 6a and a pressing support 8, the printhead assembly 7c is disposed on the base frame 1, the rubber roller 6 is rotatably disposed on the support 2, and the support 2 is detachably disposed on the base frame 1. The bracket 2 is detachably connected with the base frame 1 and can be separated by a wrench 10. After the bracket 2 is assembled with the base frame 1, two ends of the rubber roller 6 are positioned on the clamping hooks 14 (see fig. 3).

As shown in fig. 4, the bracket 2 has a built-in groove 24 and is in a bar shape, and includes a first side portion 21, a second side portion 22 and a connecting portion 23 located at both ends of the first side portion 21 and the second side portion 22, the rubber roller 6 is rotatably disposed on the connecting portion 23 and located at a port of the built-in groove 24, the fixed knife 9 is disposed on an upper end surface of the first side portion 21, the first protection member 71 is disposed on the first side portion 21 and an outer end surface thereof protrudes from the first side portion 21, and the second protection member 72 is disposed on the second side portion 22 and protrudes from the second side portion 22. A rotating gap is formed between the first protective piece 71 and the rubber roller 6.

As shown in fig. 5, the first protector is mounted as follows: the first side portion 21 has a front end formed with a socket 111, and the first protector 71 has a socket 711 inserted into the socket 111. The mounting structure of the second protector 72 refers to the arrangement of the first protector.

The bracket 2 is elastically provided with a paper pressing plate 8, the paper pressing plate 8 is positioned between the rubber roller 6 and the second side portion 22, and the paper pressing plate 8 is provided with a third protection piece 73, and the third protection piece 73 is protruded from the outer end face of the paper pressing plate 8 and has a rotating gap with the rubber roller 6. The paper pressing plate 8 is arranged on the support 2 through the connecting shaft 83, the connecting part 23 is provided with an arc-shaped hole 231 for the connecting shaft 83 to swing, the built-in groove 24 of the support 2 is internally provided with an elastic sheet 25, one end of the elastic sheet 25 is propped against the inner wall of the support 2, the other end of the elastic sheet is propped against the inner side of the paper pressing plate 8, the rubber roller 6 is rotatably arranged on the support 2 through the rubber roller shaft 62, and one end of the paper pressing plate 8 is also provided with a connecting ring 81 sleeved on the rubber roller. The paper pressing plate 8 swings along the arc-shaped hole 231 around the glue roller shaft 62.

As shown in fig. 4 and 6, the third protection member 73 is specifically configured as follows: the connecting shaft 83 is disposed through the paper pressing plate 8, the paper pressing plate 8 has a positioning block 82, and the third protection member 73 has a cavity 731 through which the connecting shaft 83 passes and a positioning hole 732 adapted to the positioning block 82.

In this embodiment, the first protection member 71, the second protection member 72 and the third protection member 73 are made of a silicone material. The bed frame 1 is made of zinc alloy, and the fixed knife 9 and the movable knife 6a are both provided with Teflon coatings so as to prolong the service life of the cutting knife.

In the state of paper feeding and printing, the outer end faces of the first protector 71, the second protector 72 and the third protector 73 can be in contact with the adhesive face of the label without base paper, so that the cutter and the paper pressing plate can be protected from being adhered by the adhesive.

As shown in fig. 3, the base frame 1 has a first mounting arm 12 on one side, a first gear shaft 11 is formed on the first mounting arm 12, a first gear cover 3 is disposed on one side of the first mounting arm 12, and a first transmission gear set 5 is disposed in a mounting area between the first gear cover 3 and the base frame 1; the gears of the first transmission gear set 5 are arranged on the first gear shaft 11 and can rotate. The first gear cover 3 is provided with a mounting hole 31 for the gear shaft 11 to be disposed.

A printing motor 4 is arranged on the inner side of the first mounting arm 12, a first output gear 41 is arranged on an output shaft of the printing motor 4, and the first output gear 41 is in meshing transmission connection with a power input end of the first transmission gear set 5; the shell of the printing motor 4 is closely attached to the inner side surface of the first mounting arm 12.

The other side of the base frame 1 is provided with a second mounting arm 13, the inner side of the second mounting arm 13 is provided with a cutting motor 4a, the outer side of the second mounting arm 13 is provided with a second gear cover 3a, a second gear shaft 11a is formed on the second mounting arm 13, a second transmission gear set 5a is arranged in the inner space between the second mounting arm 13 and the second gear cover 3a, and gears on the second transmission gear set 5a are arranged on the second gear shaft 11 a.

A second output gear 41a is arranged on an output shaft of the cutting motor 4a, and the second output gear 41a is in meshing transmission connection with a power input end of a second transmission gear set 5 a; the power output end of the second transmission gear set 5a is meshed with the rack part 71a on the tool rest 7a for transmission, and the movable blade 6a is arranged on the tool rest 7 a; the shell of the cutting motor 4a is closely attached to the inner side surface of the second mounting arm 13.

The printing motor 4 is in transmission connection with the rubber roller 6 through a first transmission gear set 5. The second transmission gear set 5a of the cutting motor 4a is in transmission connection with the movable knife 6 a.

The first gear shaft 11 and the second gear shaft 11a are integrally formed on the base frame 1 made of alloy materials, the accumulated error of the first gear shaft 11 and the second gear shaft 11a on the base frame 1 is small, the transmission precision of the gear set is improved, the overall strength is increased, and the clamping hook 14 is not easy to break or damage. And because the shells of the printing motor 4 and the driving motor 4a are clung to the first mounting arm 12 and the second mounting arm 12a, the efficient heat dissipation is facilitated during heating, the heating and temperature rise of the printer are restrained, and the problems of performance reduction and damage of the printing motor caused by overhigh temperature can be avoided.

Claims

1. A thermal printer comprises a base frame (1), a support (2), a printing head assembly (7c) and a rubber roller (6), wherein the printing head assembly (7c) is arranged on the base frame (1), the rubber roller (6) can be rotatably arranged on the support (2), and the support (2) can be detachably arranged on the base frame (1); the label printing device is characterized in that a first protection piece (71) and a second protection piece (72) are respectively arranged on the two sides, located on the rubber roller (6), of the support (2), a rotating gap is formed between the first protection piece (71) and the rubber roller (6), and the outer end faces of the first protection piece (71) and the second protection piece (72) can be in contact with an adhesive surface of a bottomless paper label in a paper feeding and printing state.

2. The thermal printer according to claim 1, wherein the holder (2) has a built-in groove (24) and is in a strip shape, and includes a first side portion (21), a second side portion (22), and a connecting portion (23) at both ends of the first side portion (21) and the second side portion (22), the rubber roller (6) is rotatably disposed on the connecting portion (23) and located at a port of the built-in groove (24), a stationary blade (9) is disposed on an upper end surface of the first side portion (21), the first protection member (71) is disposed on the first side portion (21) and an outer end surface thereof protrudes from the first side portion (21), and the second protection member (72) is disposed on the second side portion (22) and protrudes from the second side portion (22).

3. The thermal printer according to claim 2, wherein the first side portion (21) has a front end formed with a plug portion (111), and the first protector (71) has a socket (711) formed inside thereof to be fitted into the plug portion (111).

4. A thermal printer according to claim 2, characterised in that the frame (2) is provided with a resilient platen (8), the platen (8) being located between the rubber roller (6) and the second side (22), and in that the platen (8) is provided with a third protection (73), the third protection (73) protruding from the outer end face of the platen (8) with a rotational clearance to the rubber roller (6).

5. The thermal printer according to claim 4, wherein the platen (8) is disposed on the frame (2) through a connecting shaft (83), the connecting portion (23) has an arc hole (231) for the connecting shaft (83) to swing, an elastic piece (25) is disposed in the built-in groove (24) of the frame (2), one end of the elastic piece (25) abuts against the inner wall of the frame (2), the other end of the elastic piece abuts against the inner side of the platen (8), the rubber roller (6) is rotatably disposed on the frame (2) through the rubber roller shaft (62), and one end of the platen (8) is further provided with a connecting ring (81) sleeved on the rubber roller shaft (62).

6. The thermal printer according to claim 5, wherein the connecting shaft (83) is disposed through the platen (8), the platen (8) has a positioning block, and the third protection member (73) has a cavity for the connecting shaft (83) to pass through and a positioning hole adapted to the positioning block.

7. The thermal printer of claim 1, further comprising

A first gear cover (3) provided on one side of the base frame (1), and

a first transmission gear set (5) arranged in an installation area between the first gear cover (3) and the base frame (1);

the base frame (1) is made of metal alloy and is provided with a plurality of first gear shafts (11) in one side in a molding mode, and gears on the first transmission gear set (5) are arranged on the first gear shafts (11) and can rotate.

8. The thermal printer according to claim 7, wherein the base frame (1) has a first mounting arm (12) on one side, the first gear shaft (11) is formed on the first mounting arm (12), the inner side of the first mounting arm (12) is provided with the printing motor (4), the output shaft of the printing motor (4) is provided with a first output gear (41), and the first output gear (41) is in meshing transmission connection with the power input end of the first transmission gear set (5); the shell of the printing motor (4) is tightly attached to the inner side surface of the first mounting arm (12).

9. The thermal printer according to claim 8, wherein the other side of the base frame (1) is provided with a second mounting arm (13), the inner side of the second mounting arm (13) is provided with a cutting motor (4a), the outer side of the second mounting arm is provided with a second gear cover (3a), the inner space between the second mounting arm (13) and the second gear cover (3a) is provided with a second transmission gear set (5a), the output shaft of the cutting motor (4a) is provided with a second output gear (41a), and the second output gear (41a) is in meshing transmission connection with the power input end of the second transmission gear set (5 a); the power output end of the second transmission gear set (5a) is in meshed transmission with a rack part (71a) on the tool rest (7a), and the movable tool (6a) is arranged on the tool rest (7 a); the shell of the cutting motor (4a) is tightly attached to the inner side surface of the second mounting arm (13).