CN210821438U

CN210821438U - Thermal printer

Info

Publication number: CN210821438U
Application number: CN201921336902.7U
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: 2020-06-23
Anticipated expiration: 2029-08-16

Abstract

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

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 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.

At present, a common thermal printer can only meet the printing requirement of paper with a certain width, if the width of the printed paper is changed, the thermal printer with other models needs to be purchased, certain waste exists, and improvement is needed.

In addition, 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. Therefore, the existing printhead assembly and the base are provided with a cover opening mechanism to facilitate the cover opening operation, and the related documents can refer to the previous patent documents of the applicant, such as the chinese patent invention patent No. ZL201410604555.7, namely the thermal printer of bills (the publication number is CN 104309311B); reference may also be made to the thermal printer of the invention of China having patent No. ZL201710535432.6 (publication No. CN 107310276B).

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a thermal printer of paper width regulation is provided to foretell technical current situation.

The utility model aims to solve still another technical problem provide a thermal printer of simple operation of uncapping to foretell technical situation.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: 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 rubber roller can be rotatably arranged on the engine base and is provided with a driving gear meshed with the transmission gear set;

the frame is detachably arranged on the base through a release mechanism;

the printing head assembly is arranged on the rack and is close to the printing head assembly;

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

The first sliding block is arranged at one end of the sliding chute in a sliding way, 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 arranged at the other end of the sliding chute in a sliding manner, 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 the paper; and

and the middle gear can be rotatably arranged in the middle of the sliding chute, and two sides of the middle 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 a close 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 base is provided with a rack part, and correspondingly, the reed is provided with a convex part which is matched and positioned with the rack part.

Furthermore, the outer end face of the intermediate gear is provided with a cover plate which can limit the first stop block part and the second stop block part to continuously draw close.

Preferably, the rack is provided with a first positioning rod and a second positioning rod at intervals in parallel with the length direction of the printing head assembly, and the front end surface of the machine base is respectively provided with a first positioning groove and a second positioning groove for the arrangement of the first positioning rod and the second positioning rod;

the release 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 to the base with the lock plate and can synchronously drive the lock plate to rotate; and

and the middle part of the deflector rod can be rotatably arranged on the 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 driving rod is matched with the transmission block to drive the locking plate to rotate, so that the first positioning groove and the second positioning groove are unlocked, the frame and the base are separated, and the operation is convenient and rapid.

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

Furthermore, the locking plate is located the connecting portion inboard, the driving block is located the connecting portion outside, the driving block is connected with one of them locking plate through a connecting pin that runs through connecting portion.

Furthermore, the locking plates are connected into a whole through a connecting bridge, and a return spring is arranged on the connecting bridge, so that the locking plates are always kept in the states of the first locating rod and the second locating rod.

In consideration of the operation hand feeling and stability of the shifting lever, the base extends outwards from the side direction to form a blocking wall, and one side of the shifting lever is formed with an elastic curved strip part which is abutted against the blocking wall and can react on the shifting lever.

Furthermore, one end of the transmission block is provided with a stress part, correspondingly, one end of the shifting lever is provided with an extrusion part which is abutted against the stress part, the extrusion part can enable the transmission block to rotate when being pressed down, and further enable the locking plate to rotate, and the first locking tongue part and the second locking tongue part simultaneously release the locking of the first positioning rod and the second positioning rod.

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

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 the base portion of fig. 2 from another perspective.

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

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

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

Detailed Description

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

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 release mechanism 2.

The front end surface of the machine base 1 is respectively provided with a first positioning groove 11 and a second positioning groove 12; specifically, two sides of the front end of the base 1 respectively extend forward to form a connecting part 1a, and a first positioning groove 11 and a second positioning groove 12 are formed in the connecting part 1 a; the machine base 1 is laterally extended outwards with a blocking wall 1 b. The motor 16 is arranged on the machine base 1.

The transmission gear set 14 is arranged on the machine base 1 and 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 release mechanism 2; the frame 4 is provided with a first positioning rod 41 and a second positioning rod 42 at an interval in parallel with the longitudinal direction of the head assembly 43, and as shown in fig. 4, the head assembly 43 is provided on the frame 4 and is close to the head assembly 43.

As shown in fig. 5, the release mechanism 2 in this embodiment includes a locking piece 23, a transmission block 22, a shift lever 21, and a rotation shaft 25. The locking plate 23 is rotatably disposed on the base 1 and located inside the connecting portion 1a, and the locking plate 23 has a first locking portion 231 capable of locking the first positioning rod 41 in the first positioning groove 11 and a second locking portion 232 capable of locking the second positioning rod 42 in the second positioning groove 12; the locking pieces 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 abutted 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 being extended by the first positioning lever 41 and the second positioning lever 42 at all times.

The driving block 22 is located outside the connecting portion 1a and has a force-receiving portion 221 at one end, the driving block 22 and the locking pieces 23 are coaxially connected to the base 1 and can synchronously drive the locking pieces 23 to rotate, and the driving block 22 is further connected to one of the locking pieces 23 through a connecting pin 27 passing through the connecting portion 1 a.

The middle part of the shift lever 21 is rotatably arranged on the machine base 1, one end of the shift lever is exposed to form a shift part 213, and the other end of the shift lever can drive the transmission block 22 to rotate. One side of the shift lever 21 is formed with an elastic curved strip portion 212, and the curved strip portion 212 can react with the shift lever 21 in abutment with the stopper wall 1 b. One end of the shift lever 21 has a pressing portion 211 abutting against the force receiving portion 221, and when the pressing portion 211 is pressed down, the driving block 22 is rotated, and the locking piece 23 is rotated, and the first locking portion 231 and the second locking portion 232 simultaneously unlock the first positioning rod 41 and the second positioning rod 42.

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

Under the initial condition, the frame is connected with the frame, pulls the portion of stirring of driving lever, and the extrusion portion acts on the atress portion of driving block, and the driving block rotates to drive two locking plates and pivot and rotate, the locking of first constant head tank and second constant head tank is broken away from first constant head tank and second constant head tank simultaneously to the contact of first spring bolt portion and second spring bolt portion on the locking plate, and the frame is thrown off with the frame like this.

When the first positioning rod and the second positioning rod are connected, the first positioning rod is aligned to the first positioning groove, the second positioning rod is aligned to the second positioning groove, the first positioning rod and the second positioning rod overcome the acting force of the reset spring and are pressed into the respective positioning grooves to be assembled in place, and the first lock tongue portion and the second lock tongue portion lock the first positioning rod and the second positioning rod respectively and simultaneously to limit the first positioning rod and the second positioning rod to be separated from the machine base.

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

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

The intermediate gear 3b is rotatably disposed in the middle of the slide groove 17 and is engaged with the first rack 311 and the second rack 321 at both sides thereof. The outer end face of the intermediate gear 3b is provided with a cover plate 3c, and the cover plate 3c can limit the first stopper portion 312 and the second stopper portion 322 to move closer.

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

In the present embodiment, the back surface of the first slider 31 is provided with a spring piece 3a, and the spring piece 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 spring plate 3a has a projection 31a positioned to fit the rack portion 171. The protruding portion 31a of the spring piece 3a cooperates with the rack portion 171 to position the first slider 31 and the second slider 32, and the paper width is determined.

Claims

1. A thermal printer includes

A machine base (1);

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

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

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

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

a printhead assembly (43) disposed on the frame (4) and adjacent to the printhead assembly (43);

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

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

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

and an intermediate gear (3b) rotatably provided in the middle of the slide groove (17) and having both sides engaged with the first rack (311) and the second rack (321) for transmission.

2. The thermal printer according to claim 1, wherein a spring plate (3a) is provided on the back surface of the first slider (31), and the spring plate (3a) is always in close contact with the inner wall of the frame (1).

3. A thermal printer according to claim 2, characterised in that the inner wall of the housing (1) has a rack portion (171), and correspondingly the spring plate (3a) has a projection which is positioned in cooperation with the rack.

4. The thermal printer according to claim 2, wherein 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 stopper portion (312) and the second stopper portion (322) from moving closer.

5. The thermal printer according to claim 1, wherein the frame (4) is provided with a first positioning rod (41) and a second positioning rod (42) at intervals in parallel with the longitudinal direction of the printhead assembly (43), and the front end surface of the frame (1) is provided with a first positioning groove (11) and a second positioning groove (12) for the first positioning rod (41) and the second positioning rod (42) respectively;

the release mechanism (2) comprises

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

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

the middle part of the deflector rod (21) is 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.

6. The thermal printer according to claim 5, wherein the frame (1) has connecting portions (1a) extending forward from opposite sides of a front end thereof, and the first positioning groove (11) and the second positioning groove (12) are formed in the connecting portions (1 a); the disengaging mechanism (2) further comprises a rotating shaft (25) arranged on the base (1), the rotating shaft (25) is arranged in parallel to the length direction of the rubber roller (13), and the locking plates (23) are two and are respectively positioned at two ends of the rotating shaft (25) and are close to respective connecting parts (1 a).

7. A thermal printer according to claim 6, characterised in that the locking tab (23) is located inside the connecting portion (1a) and the actuating block (22) is located outside the connecting portion (1a), the actuating block (22) being connected to one of the locking tabs (23) by a connecting pin (27) passing through the connecting portion (1 a).

8. The thermal printer according to claim 6, 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 being extended by the first positioning rod (41) and the second positioning rod (42) at all times.

9. The thermal printer according to claim 5, wherein the frame (1) has a retaining wall (1b) extending laterally outward, and a curved portion (212) having elasticity is formed on one side of the lever (21), the curved portion (212) being capable of reacting against the lever (21) in opposition to the retaining wall (1 b).

10. The thermal printer according to claim 5, wherein the actuator block (22) has a force receiving portion (221) at one end thereof, and correspondingly, the lever (21) has a pressing portion (211) at one end thereof abutting against the force receiving portion (221), the pressing portion (211) being depressed to rotate the actuator block (22) and thus the locking plate (23), the first locking tongue portion (231) and the second locking tongue portion (232) simultaneously unlocking the first positioning rod (41) and the second positioning rod (42).