CN110481173B

CN110481173B - Thermal printer

Info

Publication number: CN110481173B
Application number: CN201910757798.7A
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: 2019-08-16
Filing date: 2019-08-16
Publication date: 2024-03-29
Anticipated expiration: 2039-08-16
Also published as: CN110481173A

Abstract

The thermal printer comprises a machine base, a motor, a transmission gear set, a printing head assembly, a machine frame and a rubber roller, and is characterized in that a sliding groove is transversely formed in the front end of the machine base; the front end of the machine base is provided with a sliding mechanism with adjustable paper width. The width of the printing paper can be adjusted by adjusting the sliding mechanism, so that the printing of various papers can be realized by one machine, and the aim of multiple purposes is fulfilled. Convenient and quick operation and simple and practical structure.

Description

Thermal printer

Technical Field

The invention relates to a thermal printer which is applied to bill printing of a cash dispenser and a supermarket cash register.

Background

Most automatic teller machines of banks and cash registers of supermarkets are provided with thermal printers for printing transaction vouchers or tickets. Thermal printers typically have a housing in which is mounted a cartridge consisting of a printhead assembly mounted above the housing, a housing, and a paper cutting blade mounted to one side of the housing and the printhead assembly. A paper feed passage is formed between the printhead assembly and the housing, through which thermal printing paper passes.

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

The conventional thermal printer can only meet the printing requirement of paper with a certain width, if the width of the printing paper is changed, the thermal printer with other types needs to be purchased, and certain waste exists and needs to be improved.

In addition, since the thermal printer needs to replace the printing paper frequently during operation, the printing head is often required to be separated from the base, namely, the uncapping operation is often required; another type of jam is encountered where a door opening operation is required. Therefore, the existing printhead assembly and the base are provided with a cover opening mechanism for opening the cover, and related documents can refer to patent documents before the applicant, such as Chinese patent application publication No. ZL201410604555.7 (patent publication No. CN 104309311B); reference may also be made to the chinese patent of invention "thermal printer" having the patent number ZL201710535432.6 (issued to CN 107310276B).

Disclosure of Invention

The present invention has been made in view of the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a thermal printer with paper width adjustment.

Another technical problem to be solved by the present invention is to provide a thermal printer with a convenient cover opening operation.

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

A base;

the motor is arranged on the base;

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

the rubber roller is rotatably arranged on the machine seat and is provided with a driving gear meshed with the transmission gear set;

the frame is detachably arranged on the machine base through a disengaging mechanism;

a printhead assembly disposed on the frame and adjacent to the printhead assembly;

the device is characterized in that a chute is transversely arranged at the front end of the machine base; the front end of the stand is provided with a sliding mechanism with adjustable paper width; the sliding mechanism comprises

The first sliding block is slidably arranged at one end of the sliding groove, one end of the first sliding block is provided with a first rack, and the other end of the first sliding block is provided with a first stop block part;

the second sliding block is slidably arranged at the other end of the sliding groove, one end of the second sliding block is provided with a second rack, the other end of the second sliding block is provided with a second stop block part, and the distance between the second stop block part and the first stop block part is the width of paper; and

the intermediate gear is rotatably arranged in the middle of the chute and two sides of the intermediate gear are respectively meshed with the first rack and the second rack for transmission.

The back of the first sliding block is provided with a reed which is always kept in an attached state with the inner wall of the machine base. The reed can ensure that the first sliding block is positioned at a certain position and has certain damping property.

Further, the inner wall of the stand is provided with a rack part, and correspondingly, the reed is provided with a protruding part matched with the rack part.

Further, a cover plate is arranged on the outer end face of the intermediate gear, and the cover plate can limit the first stop block part and the second stop block part to be continued to be closed.

Preferably, the frame is provided with a first positioning rod and a second positioning rod at intervals in the length direction of the parallel printing head assembly, and the front end surface of the frame is provided with a first positioning groove and a second positioning groove for the first positioning rod and the second positioning rod to be arranged respectively;

the disengagement mechanism comprises

The locking plate can be rotatably arranged on the machine base and is provided with a first locking tongue part capable of locking the first positioning rod in the first positioning groove and a second locking tongue part capable of locking the second positioning rod in the second positioning groove;

the transmission block is coaxially connected with the locking plate on the machine base and can synchronously drive the locking plate to rotate; and

the middle part of the deflector rod can be rotatably arranged on the machine base, one end of the deflector rod is exposed to form a deflector part, and the other end of the deflector rod can drive the transmission block to rotate.

The locking plate is driven to rotate by the driving rod matched with the transmission block, so that unlocking of the first positioning groove and the second positioning groove is realized, and the frame and the machine base are separated, so that the operation is convenient and quick.

Furthermore, the two sides of the front end of the stand are respectively extended forwards to form a connecting part, and the first positioning groove and the second positioning groove are arranged on the connecting parts; the disengaging mechanism also comprises a rotating shaft arranged on the machine base, the rotating shaft is parallel to the length direction of the rubber roller, and the locking plates are two pieces which are respectively positioned at two ends of the rotating shaft and are close to the respective connecting parts.

Further, the locking plate is located inside the connecting portion, the transmission block is located outside the connecting portion, and the transmission block is connected with one of the locking plates through a connecting pin penetrating through the connecting portion.

Further, the locking plates are connected into a whole through a connecting bridge, and a reset spring is arranged on the connecting bridge, so that the locking plates always keep the first positioning rod and the second positioning rod in the state.

In consideration of the operation handfeel and stability of the deflector rod, the base is laterally and outwards extended with a baffle wall, one side of the deflector rod is formed with an elastic curved strip part, and the curved strip part can resist the deflector rod by abutting against the baffle wall.

Further, a force receiving portion is provided at one end of the transmission block, correspondingly, an extrusion portion is provided at one end of the shift lever and abuts against the force receiving portion, the extrusion portion is pressed down to enable the transmission block to rotate, and further enable the locking plate to rotate, and the first locking tongue portion and the second locking tongue portion simultaneously unlock the first positioning lever and the second positioning lever.

Compared with the prior art, the invention has the advantages that: the width of the printing paper can be adjusted by adjusting the first sliding block or the second sliding block of the sliding mechanism, so that printing of various papers can be realized by one machine, and the aim of multiple purposes is fulfilled. Convenient and quick operation and simple and practical structure.

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 of the base portion of fig. 2.

Fig. 4 is a schematic view of a portion of the frame of fig. 2 from another perspective.

Fig. 5 is a reduced exploded view of fig. 3.

Fig. 6 is an enlarged view of the slide mechanism of fig. 5.

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 in this embodiment includes a base 1, a motor 16, a transmission gear set 14, a rubber roller 13, a frame 4, a print head assembly 43, a sliding mechanism 3 and a releasing mechanism 2.

The front end face of the machine base 1 is respectively provided with a first positioning groove 11 and a second positioning groove 12; specifically, the two sides of the front end of the stand 1 are respectively extended forward to form a connecting part 1a, and a first positioning groove 11 and a second positioning groove 12 are formed on the connecting part 1 a; the housing 1 extends laterally outwardly with a retaining wall 1b. The motor 16 is provided on the housing 1.

The transmission gear set 14 is arranged on the machine base 1 and is connected with the power output end of the motor 16, and the gear cover 1c is arranged on the machine base 1 and covers the transmission gear set 14.

The rubber roller 13 is rotatably arranged on the machine base 1 through a rubber roller shaft and is provided with a driving gear 131 meshed with the transmission gear set 14.

The frame 4 is detachably arranged on the machine base 1 through the disengaging mechanism 2; the frame 4 is provided with a first positioning lever 41 and a second positioning lever 42 at intervals in the longitudinal direction of the print head assembly 43, and the print head assembly 43 is provided on the frame 4 and in the vicinity of the print head assembly 43 as shown in fig. 4.

As shown in fig. 5, the release mechanism 2 in this embodiment includes a lock piece 23, a transmission block 22, a lever 21, and a rotation shaft 25. The locking plate 23 is rotatably arranged on the stand 1 and positioned at the inner side of the connecting part 1a, and the locking plate 23 is provided with a first locking tongue 231 capable of locking the first positioning rod 41 in the first positioning groove 11 and a second locking tongue 232 capable of locking the second positioning rod 42 in the second positioning groove 12; the locking plates 23 are connected into a whole through a connecting bridge 24, a return spring 26 is arranged on the connecting bridge 24, and the other end of the return spring 26 is propped against the inner wall of the cover plate 15 on the machine base 1. The return spring 26 can keep the lock piece 23 in the state of the first positioning lever 41 and the second positioning lever 42 that are long all the time.

The transmission block 22 is located outside the connecting portion 1a and has a force receiving portion 221 at one end, the transmission block 22 and the locking plate 23 are coaxially connected to the machine base 1 and can synchronously drive the locking plate 23 to rotate, and the transmission block 22 is further connected with one of the locking plates 23 through a connecting pin 27 penetrating through the connecting portion 1a.

The middle part of the deflector rod 21 can be rotatably arranged on the machine base 1, one end of the deflector rod is exposed to form a deflector part 213, and the other end of the deflector rod can drive the transmission block 22 to rotate. One side of the lever 21 is formed with a curved strip portion 212 having elasticity, and the curved strip portion 212 can be reacted against the blocking wall 1b on the lever 21. One end of the shift lever 21 has a pressing portion 211 that abuts against the force receiving portion 221, and the pressing portion 211 is pressed to rotate the transmission block 22 and thus the lock piece 23, so that the first lock tab 231 and the second lock tab 232 simultaneously unlock the first positioning lever 41 and the second positioning lever 42.

The rotating shaft 25 is arranged on the machine base 1 and is parallel to the length direction of the rubber roller 13, and the locking plates 23 are two pieces which are respectively positioned at two ends of the rotating shaft 25 and are close to the respective connecting parts 1a.

In the initial state, the frame is connected with the machine base, the stirring part of the stirring rod is pulled, the extrusion part acts on the stress part of the transmission block, the transmission block rotates and drives the two locking plates and the rotating shaft to rotate, the first locking tongue part and the second locking tongue part on the locking plates are contacted with the locking of the first positioning groove and the second positioning groove, and the first positioning rod and the second positioning rod are separated from the first positioning groove and the second positioning groove at the same time, so that the frame is separated from the machine base.

When the connecting assembly is carried out, the first positioning rod is aligned with the first positioning groove, the second positioning rod is aligned with the second positioning groove, the first positioning rod and the second positioning rod are pressed into the respective positioning grooves against the acting force of the return spring, the connecting assembly is assembled in place, and the first locking tongue part and the second locking tongue part lock the first positioning rod and the second positioning rod respectively at the same time, so that the connecting assembly is limited to be separated from the base.

As shown in fig. 5 and 6, the front end of the stand 1 is transversely provided with a chute 17; the front end of the machine base 1 is provided with a sliding mechanism 3 with adjustable paper width; the slide mechanism 3 includes a first slider 31, a second slider 32, and an intermediate gear 3b.

The first slider 31 is slidably disposed at one end of the chute 17, one end of the first slider 31 has a first rack 311, and the other end is formed with a first stopper 312; the second slider 32 is slidably disposed at the other end of the chute 17, one end of the second slider 32 has a second rack 321, and the other end is formed with a second stop portion 322, and a distance between the second stop portion 322 and the first stop portion 312 is a width of the paper.

The intermediate gear 3b is rotatably arranged in the middle of the chute 17, and two sides of the intermediate gear are respectively meshed with the first rack 311 and the second rack 321 for transmission. The outer end surface of the intermediate gear 3b is provided with a cover plate 3c, and the cover plate 3c can limit the first stop block 312 and the second stop block 322 to be further closed.

The first sliding block or the second sliding block is driven, so that the adjustment of the distance between the first stop block part and the second stop block part can be realized, and the adjustment of the paper width is further satisfied.

The back of the first slider 31 in this embodiment is provided with a reed 3a, and the reed 3a is always kept in close contact with the inner wall of the housing 1. The inner wall of the housing 1 has a rack portion 171, and correspondingly, the reed 3a has a boss positioned to cooperate with the rack portion 171. The protruding portion of the reed 3a cooperates with the rack portion 171 to position the first slider 31 and the second slider 32, and the sheet width is determined.

Claims

1. A thermal printer includes

A base (1);

a motor (16) arranged on the base (1);

a transmission gear set (14) which is arranged on the machine base (1) and is connected with the power output end of the motor (16);

a rubber roller (13) rotatably arranged on the base (1) and provided with a driving gear (131) meshed with the transmission gear set (14);

a frame (4) which is detachably arranged on the machine base (1) through a disengaging mechanism (2);

a print head assembly (43) disposed on the frame (4) and adjacent to the glue roller;

it is characterized in that the front end of the stand (1) is transversely provided with a chute (17); the front end of the stand (1) is provided with a sliding mechanism (3) with adjustable paper width; the sliding mechanism (3) comprises

A first slider (31) slidably provided at one end of the chute (17), wherein one end of the first slider (31) has a first rack (311) and the other end has a first stopper portion (312);

a second slider (32) slidably provided at the other end of the chute (17), wherein one end of the second slider (32) has a second rack (321), and a second stopper portion (322) is formed at the other end, and a distance between the second stopper portion (322) and the first stopper portion (312) is the width of the paper; and

an intermediate gear (3 b) rotatably provided in the middle of the chute (17) and engaged with and driven by the first rack (311) and the second rack (321), respectively;

the back of the first sliding block (31) is provided with a reed (3 a), and the reed (3 a) is always kept in an attached state with the inner wall of the machine base (1);

a first positioning rod (41) and a second positioning rod (42) are arranged on the machine frame (4) in parallel with the printing head assembly (43) at intervals in the length direction, and a first positioning groove (11) and a second positioning groove (12) for arranging the first positioning rod (41) and the second positioning rod (42) are respectively arranged on the front end surface of the machine base (1);

the disengagement mechanism (2) comprises

A lock piece (23) rotatably arranged on the base (1), wherein the lock piece (23) is provided with a first lock tongue (231) capable of locking the first positioning rod (41) in the first positioning groove (11) and a second lock tongue (232) capable of locking the second positioning rod (42) in the second positioning groove (12);

the transmission block (22) is coaxially connected with the locking plate (23) on the machine base (1) and can synchronously drive the locking plate (23) to rotate; and

the middle part of the deflector rod (21) can be rotatably arranged on the base (1), one end of the deflector rod is exposed to form a deflector part (213), and the other end of the deflector rod can drive the transmission block (22) to rotate.

2. Thermal printer according to claim 1, characterized in that the inner wall of the housing (1) has a rack portion (171), and in correspondence with this, the reed (3 a) has a projection positioned in cooperation with the aforesaid rack portion.

3. A thermal printer according to claim 1, wherein the outer end face of the intermediate gear (3 b) is provided with a cover plate (3 c), the cover plate (3 c) being adapted to limit the continued closing of the first and second stop portions (312, 322).

4. The thermal printer according to claim 1, wherein the front end of the housing (1) has a connecting portion (1 a) extending forward from both sides thereof, and the first positioning slot (11) and the second positioning slot (12) are formed on the connecting portion (1 a); the disengaging mechanism (2) further comprises a rotating shaft (25) arranged on the machine base (1), the rotating shaft (25) is parallel to the length direction of the rubber roller (13), and the locking plates (23) are two pieces which are respectively positioned at two ends of the rotating shaft (25) and close to the respective connecting parts (1 a).

5. A thermal printer according to claim 4, wherein said locking tabs (23) are located inside the connecting portion (1 a), said driving block (22) is located outside the connecting portion (1 a), and said driving block (22) is connected to one of the locking tabs (23) by a connecting pin (27) passing through the connecting portion (1 a).

6. The thermal printer according to claim 4, wherein the locking pieces (23) are integrally connected by a connecting bridge (24), and a return spring is provided on the connecting bridge (24) to keep the locking pieces (23) in a state of locking the first positioning lever (41) and the second positioning lever (42) all the time.

7. A thermal printer according to claim 1, wherein the housing (1) extends laterally outwardly with a blocking wall (1 b), and one side of the lever (21) is formed with a flexible curved strip portion (212), and the curved strip portion (212) can counteract the lever (21) against the blocking wall (1 b).

8. The thermal printer according to claim 1, wherein the transmission block (22) has a force receiving portion (221) at one end, and correspondingly, the lever (21) has a pressing portion (211) that abuts against the force receiving portion (221), and the pressing portion (211) is pressed down to rotate the transmission block (22) and thus the lock piece (23), and the first lock tongue portion (231) and the second lock tongue portion (232) simultaneously unlock the first positioning lever (41) and the second positioning lever (42).