CN111993792A

CN111993792A - Thermal printer

Info

Publication number: CN111993792A
Application number: CN202010944774.5A
Authority: CN
Inventors: 张志龙; 李欢; 李公顶
Original assignee: Shanghai Kuangwao Technology Co ltd
Current assignee: Shanghai Kuangwao Technology Co ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2020-11-27

Abstract

Embodiments of the present invention relate to a printing apparatus, and more particularly, to a thermal printer including: the paper clamping mechanism is arranged on the shell; the shell is sequentially provided with a paper clamping area, a paper feeding area opposite to the paper clamping area and a paper outlet opposite to the paper feeding area along a preset linear direction; the paper clamping mechanism is arranged in the paper clamping area and used for clamping the paper disc; paper feeding mechanism and printer core all set up in sending the paper district, and paper feeding mechanism is close to the exit slot setting, and printer core includes: the paper outlet mechanism comprises a machine core body and a guide side plate, wherein the machine core body and the paper feeding mechanism are arranged oppositely along a paper outlet direction perpendicular to the paper outlet, and the guide side plate is arranged on one side of the machine core body deviating from the paper outlet and extends towards the paper clamping mechanism to form. Compared with the prior art, the mode that can go out before and after the back realizes printing, when making things convenient for the staff to look over the printing content, can also reduce the gravity of paper when the conveying, consequently can furthest avoid the emergence of card paper phenomenon for the play paper of printer is more smooth and easy.

Description

Thermal printer

Technical Field

Embodiments of the present invention relate to a printing apparatus, and more particularly, to a thermal printer.

Background

Thermal printer, as a kind of printer that adopts the thermal mode to print, the place such as market, bank, supermarket is applied to mostly, and present printer generally adopts the mode of upwards going out paper when printing, but this kind of play paper mode can make the clear upper surface that shows at the thermal paper of printing content for the printer is after accomplishing to printing, makes things convenient for the staff to look over, but this kind of printing mode, because upwards goes out paper, consequently the paper gravity that receives when going out paper is the biggest, therefore the dead phenomenon of paper card often appears in the paper when the conveying.

Disclosure of Invention

The embodiment of the invention aims to provide a thermal printer, which can be convenient for workers to check the printing content and can avoid the paper jam phenomenon to the maximum extent so that the paper outlet of the printer is smoother.

To solve the above technical problem, an embodiment of the present invention provides a thermal printer, including:

a housing; the shell is sequentially provided with a paper clamping area, a paper conveying area opposite to the paper clamping area and a paper outlet opposite to the paper conveying area along a preset linear direction;

the paper clamping mechanism is arranged in the paper clamping area and used for clamping the paper disc;

the paper feeding mechanism is arranged in the paper feeding area and is adjacent to the paper outlet;

the printer core, set up in send the paper district in, and include: the machine core comprises a machine core body and a guide side plate; the machine core body with paper feeding mechanism follows the perpendicular to paper outlet's play paper direction sets up relatively, the direction curb plate set up in the machine core body deviates from one side of paper outlet, and towards the direction of pressing from both sides paper mechanism extends the formation.

Compared with the prior art, the thermal printer has the advantages that the paper clamping area, the paper feeding area and the paper outlet are sequentially formed in the shell along the preset linear direction, the paper clamping mechanism is arranged in the paper clamping area, and the paper feeding mechanism and the printer core are arranged in the paper feeding area, so that the thermal printer can realize printing in a back-and-forth-out mode, printing contents can be conveniently checked by workers, meanwhile, the gravity of paper during conveying can be reduced, paper jamming can be avoided to the maximum extent, and paper outlet of the printer is smoother.

In addition, the housing includes:

a base plate;

the front panel and the rear panel are opposite on the bottom plate along the length direction of the bottom plate and are arranged in parallel;

the first side plate and the second side plate are opposite to each other on the bottom plate along the width direction of the bottom plate and are arranged in parallel;

wherein, the length direction of the bottom plate is the preset straight line direction.

In addition, the direction curb plate from with the one end that the core body links to each other to the other end, gradually towards keep away from the direction slope of bottom plate extends and forms, the one end that the direction curb plate kept away from the core body is higher than being in full paper state the paper dish.

In addition, the printer cartridge further includes: the supporting plate is respectively connected with the guide side plate and the bottom plate;

the supporting plate is formed by vertically extending one end, far away from the movement body, of the guide side plate towards the direction perpendicular to the bottom plate.

In addition, the height of the front panel along the direction vertical to the bottom plate is smaller than the height of the rear panel along the direction vertical to the bottom plate;

the thermal printer further includes:

the turnover cover is arranged above the front panel and is arranged along the length direction of the bottom plate and opposite to the rear panel; one side of the turnover cover, which is far away from the bottom plate, is hinged with the first side plate and the second side plate respectively;

the flip cover can turn relative to the rear panel by taking the hinged end of the first side plate and the hinged end of the second side plate as a pivot point;

when flip turned over to extreme position towards the direction of rear panel, flip with the front panel is in the coplanar, flip with the front panel one side relative to each other separates each other and forms the exit slot.

In addition, the paper feeding mechanism is arranged on one side of the turnover cover opposite to the rear panel;

when the turnover cover is turned to the limit position in the direction far away from the rear panel, the paper feeding mechanism is moved out of the shell.

In addition, the paper feeding mechanism includes:

a first bracket and a second bracket; the first bracket and the second bracket are oppositely arranged on the flip cover along the width direction of the bottom plate;

a thermo-sensitive glue roller comprising: the rubber roller comprises a rubber roller body, a first convex shaft and a second convex shaft, wherein the first convex shaft is formed by protruding one end of the rubber roller body outwards along the axis direction of the rubber roller body, the second convex shaft is formed by protruding the other end of the rubber roller body outwards along the axis direction of the rubber roller body, the first convex shaft is rotationally connected with the first support, and the second convex shaft is rotationally connected with the second support;

and the driving element is arranged on the first support and connected with the first convex shaft, or arranged on the second support and connected with the second convex shaft.

In addition, the thermal printer further includes: the paper clamping area cover plate and the paper feeding area cover plate are arranged along the length direction of the bottom plate and opposite to each other;

the paper clamping area cover plate and the paper feeding area cover plate are arranged in parallel to the bottom plate, and one opposite sides of the paper clamping area cover plate and the paper feeding area cover plate are respectively hinged with the first side plate and the second side plate;

the paper clamping area cover plate can turn relative to the bottom plate by taking the hinged end of the first side plate and the hinged end of the second side plate as a pivot point, and is used for opening or closing the paper clamping area;

the paper feeding area cover plate can turn over relative to the bottom plate by taking the hinged end of the first side plate and the hinged end of the second side plate as a pivot point, and the paper feeding area cover plate is used for opening or closing the paper feeding area.

In addition, the paper clamping mechanism includes:

a first fixing plate and a second fixing plate; the first fixing plate is arranged on the first side plate, the second fixing plate is arranged on the second side plate, and the first fixing plate and the second fixing plate are opposite in width direction of the bottom plate and are arranged in parallel;

the first paper clamping assembly is arranged on the first fixing plate;

the second paper clamping assembly is arranged on the second fixing plate;

the first paper clamping assembly and the second paper clamping assembly are coaxially arranged and used for clamping the paper tray along the width direction of the bottom plate.

In addition, the first paper clamping assembly includes:

the limiting convex shaft is arranged on the first fixing plate; the spacing protruding axle includes: the limiting plate is connected with the first fixing plate, and the limiting bulge is connected with the limiting plate and is formed by protruding a part of one side of the limiting plate, which is far away from the first fixing plate, towards the direction of the second fixing plate;

the stroke shaft is connected with the limiting bulge and horizontally extends in the direction vertical to the second fixing plate, and a flange part is formed at one end of the stroke shaft, which is far away from the limiting bulge; the stroke shaft is used for being inserted into the paper tray;

the first paper clamping convex shaft is sleeved on the stroke shaft and can slide between the flange part and the limiting bulge along the axial direction of the stroke shaft;

the elastic element is sleeved on the stroke shaft and is positioned between the first paper clamping convex shaft and the limiting bulge; one end of the elastic element is abutted against the first paper clamping convex shaft, and the other end of the elastic element is abutted against the limiting bulge;

the second paper clamping assembly comprises:

the paper disc base plate is arranged on the second fixing plate;

the second paper clamping convex shaft is arranged on one side, far away from the second fixing plate, of the paper disc backing plate;

the first paper clamping convex shaft and the second paper clamping convex shaft are coaxially arranged along the axial direction of the stroke shaft and are used for clamping a paper disc.

In addition, one side of the first paper clamping convex shaft, which is far away from the limiting bulge, is a first clamping side for clamping the paper disc, and one side of the first paper clamping convex shaft, which is opposite to the limiting bulge, is a first supporting side abutted against the elastic element;

a plurality of first bosses which are coaxially arranged are formed on the first clamping side along the radial direction of the first paper clamping convex shaft; wherein the diameters of the first bosses are sequentially increased from the first clamping side to the first supporting side;

one side of the second paper clamping convex shaft, which is far away from the paper disc backing plate, is a second clamping side for clamping the paper disc, and one side of the second paper clamping convex shaft, which is opposite to the paper disc backing plate, is a second supporting side;

a plurality of second bosses which are coaxially arranged are formed on the second clamping side along the radial direction of the second paper clamping convex shaft; wherein the diameters of the second bosses are sequentially increased from the second clamping side to the second supporting side;

the number of the first bosses is the same as that of the second bosses, the first bosses are uniquely corresponding to the second bosses along the axial direction of the stroke shaft, and the diameter of each first boss is the same as that of the uniquely corresponding second boss.

In addition, each of the first bosses includes: the first clamping surface is opposite to the first supporting side, and the first annular surface extends from the first clamping surface to the direction of the first supporting side;

each of the second bosses includes: the second clamping surface is opposite to the second supporting side, and the second annular surface extends from the second clamping surface to the second supporting side.

In addition, the first annular surface of each first boss is formed by gradually expanding and extending from the first clamping surface of the first boss to the direction of the first supporting side;

the second ring surface of each second boss is formed by gradually expanding and extending from the second clamping surface of the second boss to the direction of the second supporting side.

Drawings

Fig. 1 is a schematic structural view of a thermal printer according to a first embodiment of the present invention;

FIG. 2 is a schematic isometric view from the front side of a thermal printer according to a first embodiment of the present invention;

FIG. 3 is a schematic isometric view from the rear perspective of a thermal printer according to a first embodiment of the present invention;

FIG. 4 is an internal isometric view from the right side of a thermal printer according to a first embodiment of the present invention;

FIG. 5 is an internal isometric view from the left side of a thermal printer in accordance with a first embodiment of the present invention;

fig. 6 is a schematic axial view of a printer cartridge of a thermal printer according to a first embodiment of the present invention;

FIG. 7 is a schematic view of the assembly of the cover and the paper feeding mechanism according to the first embodiment of the present invention;

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a schematic structural diagram of a first paper clamping assembly according to a first embodiment of the present invention;

FIG. 10 is an enlarged view of a portion of FIG. 9 at A;

FIG. 11 is a diagram illustrating a first paper clamping protruding shaft and a second paper clamping protruding shaft clamping and positioning a paper tray according to a first embodiment of the present invention;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solutions claimed in the claims of the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.

A first embodiment of the present invention relates to a thermal printer, as shown in fig. 1, including: the printer comprises a shell 1, a paper clamping mechanism 2, a paper feeding mechanism 3 and a printer core 4.

As shown in fig. 1, the housing 1 sequentially has a paper clamping area 11, a paper feeding area 12 opposite to the paper clamping area 11, and a paper outlet 13 opposite to the paper feeding area 12 along a predetermined linear direction. Further, a sheet clamping mechanism 2 is provided in the sheet clamping area 1, and the sheet clamping mechanism 2 clamps the sheet tray 100.

Next, as shown in fig. 1, the paper feeding mechanism 3 and the printer core 4 are both disposed in the paper feeding area 12, and the paper feeding mechanism 3 is disposed adjacent to the paper output 13, and the printer core 4 includes: the paper feeding mechanism comprises a core body 41 and a guide side plate 42, wherein the core body 41 and the paper feeding mechanism 3 are arranged oppositely along a paper discharging direction perpendicular to the paper discharging port 13, and the guide side plate 42 is arranged on one side of the core body 41 departing from the paper discharging port 13 and is formed by extending towards the direction of the paper clamping mechanism 2.

It can be seen through the above content that because casing 1 forms in proper order along predetermined rectilinear direction and presss from both sides paper district 11, district 12 and exit slot 13 form, press from both sides paper mechanism 2 in the paper district 11 simultaneously, and set up paper feeding mechanism 3 and printer core 4 in the district 12 form, thereby make the thermal printer of this embodiment realize printing by the mode that goes forward afterwards, when making things convenient for the staff to look over the printing content, can also reduce the gravity of paper when the conveying, consequently can furthest avoid the emergence of paper jam phenomenon when the conveying of paper, make the play paper of printer more smooth and easy.

Specifically, in the present embodiment, as shown in fig. 2 and 3 in combination, the housing 1 includes: a bottom panel 14, a front panel 15 and a back panel 16. The front panel 15 and the rear panel 16 are disposed in parallel on the bottom plate 14 so as to face each other in the longitudinal direction of the bottom plate 14. In addition, the housing 1 further includes: a first side plate 17 and a second side plate 18, and the first side plate 17 and the second side plate 18 are opposed on the bottom plate 14 in the width direction of the bottom plate 14 and are arranged in parallel. In the present embodiment, the longitudinal direction of the bottom plate may be set as the preset linear direction, but it is needless to say that the width direction of the bottom plate 14 may be set as the preset linear direction in actual use.

In addition, in the present embodiment, as shown in fig. 1, 4, and 5, the guide side plate 42 is formed to extend obliquely in a direction away from the bottom plate 14 from one end connected to the deck body 41 to the other end, and the end of the guide side plate 42 away from the deck body 41 is higher than the paper tray 100 in the full paper state. Therefore, it is easy to see that, while the support of the printing paper drawn out from the paper tray 100 can be realized by the guide side plate 42, since the end of the guide side plate 42 away from the movement body 41 is higher than the paper tray 100 in the full paper state, the tension of the printing paper during the paper conveying can be improved by the guide side plate 42 during the paper conveying, so that the printing paper is more smoothly discharged.

Further, as shown in fig. 1, 4, 5, and 6, the printer core 4 preferably further includes: a support plate 43, and the support plate 43 is further connected to the guide side plate 42 and the bottom plate 14, respectively. Meanwhile, the support plate 43 is formed by extending the end of the guide side plate 42 away from the movement body 41 vertically in a direction perpendicular to the bottom plate 14. The supporting performance of the guide side plate 42 can be improved by the supporting plate 43, and the guide side plate 42 is prevented from being deformed, so that the guide side plate 42 has better guiding performance for paper.

Note that, as shown in fig. 1 and 2, in the present embodiment, the height of the front panel 15 in the direction perpendicular to the bottom plate 14 is smaller than the height of the rear panel 16 in the direction perpendicular to the bottom plate 14. As shown in fig. 1 and 2, the thermal printer according to the present embodiment further includes: the flip 5 is disposed above the front panel 15 and is disposed opposite to the rear panel 16 along the length direction of the bottom plate 14, and at the same time, one side of the flip 5 away from the bottom plate 14 is hinged to the first side plate 17 and the second side plate 18, respectively, so that the flip 5 can be turned relative to the rear panel 16 by using the hinged ends of the first side plate 17 and the second side plate 18 as pivot points. So that the flip 5 and the front panel 15 can be in the same plane when the flip 5 is flipped to the extreme position in the direction of the rear panel 16, and at the same time, as shown in fig. 1, the sides of the flip 5 and the front panel 15 opposite to each other are spaced apart from each other to form the sheet discharge port 13. Therefore, it is easy to see that, since the paper output 13 is formed by the flip of the flip 5, after the flip 5 is turned to the extreme position in the direction away from the rear panel 16, the paper output 13 is also enlarged along with the flip of the flip 5, so that when a paper jam occurs, the worker can conveniently lead out the jammed part from the inside of the housing 1 to the outside of the housing 1 by turning the flip 5 away from the rear panel 16.

Meanwhile, by virtue of the flip characteristics of the flip 5, in the present embodiment, as shown in fig. 1, 7, and 8, the paper feed mechanism 3 may also be provided on the side of the flip 5 opposite to the rear panel 16. Therefore, when the flip 5 is turned to the limit position in the direction away from the rear panel 16, the paper feeding mechanism 3 can be moved out of the housing 1 by the flip 5, and when the flip 5 is turned to the limit position in the direction toward the rear panel 16, the paper feeding mechanism 3 can be fed into the housing again and is located above the printer core 4, and can be matched with the printer core 4 to realize printing. Therefore, by controlling the paper feeding mechanism 3 through the flip 5, when a paper jam occurs in the printer, the paper feeding mechanism 3 can be further operated through the flip 5, so that the paper jam portion can be more easily led out of the housing 1 from the housing 1, that is, the paper feeding mechanism 3 can be taken out from the housing 1 by turning the flip 5 in a direction away from the rear panel 16, thereby easily solving the paper jam and avoiding complex operation.

Specifically, in the present embodiment, as shown in fig. 7 and 8, the paper feed mechanism 3 includes: a first bracket 31, a second bracket 32, a thermo-sensitive adhesive roller 33 and a driving element 34. Wherein, the first bracket 31 and the second bracket 32 are oppositely arranged on the flip 5 along the width direction of the bottom plate 14. And the thermo-sensitive adhesive roller 33 includes: the rubber roller body 331, the first protruding shaft 332 formed by one end of the rubber roller body 331 protruding outwards along the axis direction of the rubber roller body 331, and the second protruding shaft 333 formed by the other end of the rubber roller body 331 protruding outwards along the axis direction of the rubber roller body 331 are further provided, the first protruding shaft 332 is rotatably connected with the first support 31, and the second protruding shaft 333 is rotatably connected with the second support 32. Meanwhile, the driving element 34 is disposed on the first bracket 31 and connected to the first protruding shaft 332, so that the driving element 34 can drive the rubber roller body 331 to rotate through the first protruding shaft 332. Of course, in practical applications, the driving element 34 may also be disposed on the second bracket 32 and connected to the second protruding shaft 333, so that the driving element 34 can also drive the rubber roller body 331 through the second protruding shaft 333. In addition, the driving element 34 used in the present embodiment may be a motor, and the output shaft of the motor is directly fixedly connected to the first protruding shaft 332 or the second protruding shaft 333 through a coupling, so that the rotation of the thermo-rubber roller 33 can be realized.

In addition, as shown in fig. 1, 2 and 3, the thermal printer of the present embodiment may further include: and a paper clamping area cover plate 6 and a paper feeding area cover plate 7 which are arranged along the length direction of the bottom plate 14 and are opposite to each other. And, the paper clamping area cover plate 6 and the paper feeding area cover plate 7 are both disposed in parallel with the bottom plate 14, and the sides of the paper clamping area cover plate 6 and the paper feeding area cover plate 7 opposite to each other are hinged with the first side plate 17 and the second side plate 18, respectively. The cover 6 of the paper clamping area can be pivoted with the hinged ends of the first side plate 17 and the second side plate 18, and can be turned relative to the bottom plate 14, so that the cover 6 of the paper clamping area can be turned over, and the opening or closing of the paper clamping area 11 can be realized. The paper feeding area cover 7 can be pivoted with the hinged ends of the first side plate 17 and the second side plate 18, and can be turned relative to the bottom plate 14, so as to open or close the paper feeding area 12.

Therefore, it is easy to see that the paper clamping mechanism 2, the paper feeding mechanism 3 and the paper tray 100 in the housing 1 can be protected by the paper feeding area cover plate 7 and the paper clamping area cover plate 6, and the paper tray 100 can be replaced conveniently. Meanwhile, as shown in fig. 3, an opening/closing opening 161 is further formed in one side of the rear panel 16 opposite to the paper clamping area cover plate 6, and the opening/closing opening 161 can facilitate the turning of the paper clamping area cover plate 6 by a worker, so that the turning of the paper clamping area cover plate 6 is easier. Meanwhile, as a preferred scheme, as shown in fig. 1, the lower surface of the cover plate 6 of the paper clamping area is further provided with a collision bead 8, the collision bead 8 is arranged on the cover plate 6 of the paper clamping area at a side far away from the cover plate 7 of the paper feeding area, meanwhile, the rear panel 16 is provided with a collision bead seat 9, and the collision bead seat 9 can be magnetically attracted with the collision bead 8 on the cover plate 6 of the paper clamping area when the cover plate 6 of the paper clamping area is turned to a limit position relative to the direction of the bottom plate 14, so that the cover plate 6 of the paper clamping area can be fixed by means of the magnetic attraction of the collision bead 8 and the collision bead seat 9 after the cover plate 6 of the paper clamping area closes the paper clamping area 11, and the whole printer is more reliable in use.

In addition, in the present embodiment, as shown in fig. 5 and 9, in order to realize the nipping of the paper tray 100 by the paper nipping mechanism 2, the paper nipping mechanism 2 includes: a first fixing plate 21, a second fixing plate 22, a first clamping assembly 23 and a second clamping assembly 24. The first fixing plate 21 is disposed on the first side plate 17, and the second fixing plate 22 is disposed on the second side plate 18, while the first fixing plate 21 and the second fixing plate 22 are disposed in parallel and opposed to each other in the width direction of the bottom plate 14. Further, the first sheet clamping assembly 23 is disposed on the first fixing plate 21, and the second sheet clamping assembly 24 is disposed on the second fixing plate 22, and, as shown in fig. 11, the first sheet clamping assembly 23 and the second sheet clamping assembly 24 are coaxially disposed and are configured to clamp the sheet tray 100 in the width direction of the bottom plate 14.

Specifically, as shown in fig. 5 and 9, the first paper nipping assembly 23 includes: a limit protruding shaft 231, a stroke shaft 232, a first paper clamping protruding shaft 233 and an elastic element 234. Wherein, the limit protruding shaft 231 is disposed on the first fixing plate 21, and the limit protruding shaft 231 includes: the limiting plate 2311 is connected with the first fixing plate 21, and the limiting protrusion 2312 is connected with the limiting plate 2311, and the limiting protrusion 2312 is formed by protruding a part of one side of the limiting plate 2311 departing from the first fixing plate 21 towards the direction of the second fixing plate 22.

In addition, as shown in fig. 9, the stroke shaft 232 is connected to the stopper protrusion 2312, and the stroke shaft 232 extends horizontally in a direction perpendicular to the second fixing plate 22, while, as shown in fig. 10, a flange portion 2321 is formed at an end of the stroke shaft 232 remote from the stopper protrusion 2312, and the stroke shaft 232 is used for insertion into the paper tray 100, achieving positioning of the paper tray 100.

Meanwhile, as shown in fig. 9 and 10, the first paper feed jam protruding shaft 233 is fitted over the stroke shaft 232 and is slidable between the flange portion 2321 and the stopper protrusion 2312 in the axial direction of the stroke shaft 232. The elastic element 234 is sleeved on the travel shaft 232 and located between the first paper clamping protruding shaft 233 and the limiting protrusion 2312, so that one end of the elastic element 234 can abut against the first paper clamping protruding shaft 233, and the other end of the elastic element 234 can abut against the limiting protrusion 2312 of the limiting protruding shaft 231.

And the corresponding second paper clamping assembly 24, as shown in fig. 4, includes: a paper tray backing plate 241 and a second paper clamping convex shaft 242. The tray backing plate 241 is disposed on the second fixing plate 22, and the second paper clamping protruding shaft 242 is disposed on a side of the tray backing plate 241 away from the second fixing plate 22.

As shown in fig. 11, the first paper-nipping protruding shaft 233 and the second paper-nipping protruding shaft 242 are coaxially provided along the axial direction of the stroke shaft. Therefore, when the paper tray 100 is clamped, a worker can push the first paper clamping protruding shaft 233 towards the limiting protruding shaft 231 by using the resilience of the elastic element 234, so that the elastic element 234 can be gradually compressed under the action of the first paper clamping protruding shaft 233, the stroke shaft 232 can be gradually exposed from one side of the first paper clamping protruding shaft 233 away from the limiting protruding shaft 231, after the first paper clamping protruding shaft 233 is matched with the limiting protruding shaft 231 to compress the elastic element 234 to a proper position, the paper tray 100 can be directly sleeved on the stroke shaft 232, so that the paper tray 100 can be positioned between the first paper clamping protruding shaft 233 and the second paper clamping protruding shaft 242, and then the acting force acting on the first paper clamping protruding shaft 233 is released, so that the first paper clamping protruding shaft 233 can be matched with the second paper clamping protruding shaft 242 to clamp and fix the paper tray 100 under the resilience of the elastic element 234. Therefore, it can be seen that the elastic element 234 can make the first paper-clamping protruding shaft 233 and the second paper-clamping protruding shaft 242 satisfy the clamping requirements of thermal paper with various formats.

Specifically, in order to facilitate the assembly between the protruding shaft 231, the stroke shaft 232 and the elastic element 234, as shown in fig. 9, a T-shaped groove 23131 formed by a first groove body 23131 and a second groove body 23132 is further formed on one side of the limiting protrusion 2312 opposite to the first paper clamping protruding shaft 233, wherein the inner diameter of the first groove body 23131 is smaller than that of the second groove body 23132, when assembling, the end of the stroke shaft 232 can be inserted into the first groove body 23131, and the elastic element 234 is placed in the second groove body 23132, and in this embodiment, the elastic element 234 is a spring. It can be seen that the fixing of the elastic element 234 and the stroke shaft 232 can be achieved simultaneously by the T-shaped groove 23131.

In addition, in order to clamp and fix the paper tray 100 by the first paper clamping protruding shaft 233 and the second paper clamping protruding shaft 242, as shown in fig. 10 and 11, the side of the first paper clamping protruding shaft 233 away from the limiting protrusion 2312 is a first clamping side 2331 for clamping the paper tray 100, and correspondingly, the side of the first paper clamping protruding shaft 233 opposite to the limiting protrusion 2312 is a first supporting side 2332 for abutting against the elastic element 234. The first clamping side 2331 is provided with a plurality of first bosses 23311 coaxially arranged along a radial direction of the first paper clamping protruding shaft, and the diameters of the first bosses 23311 are sequentially increased from the first clamping side 2331 to the first supporting side 2332.

Similarly, as shown in fig. 11, the side of the second paper clamping convex shaft 242 away from the paper tray backing plate 241 is a second clamping side 2421 for clamping the paper tray 100, and correspondingly, the side of the second paper clamping convex shaft 242 opposite to the paper tray backing plate 241 is a second supporting side 2422. The second clamping side 2421 forms a plurality of second bosses 24211 coaxially arranged along the radial direction of the second paper clamping protruding shaft 242, and the diameters of the second bosses 24211 become larger from the second clamping side 2421 to the second supporting side 2422.

In this embodiment, as shown in fig. 11, the number of the first bosses 23311 is the same as the number of the second bosses 24211, and the first bosses 23311 have the same diameter as the second bosses 24211, which are uniquely associated with each other in the axial direction of the stroke shaft 232. It is thus easy to see that the clamping positioning of the paper trays 100 of different diameters can be achieved by the cooperation of the first bosses 23311 and the second bosses 24211 of different diameters. In the present embodiment, as shown in fig. 10 and 11, each of the first bosses 23311 includes: a first clamping surface 233111 opposite the first support side 2332, a first annulus 233112 extending from the first clamping surface 233111 in a direction toward the first support side 2332. And each of the second bosses 24211 includes: a second clamping surface 242111 opposite the second support side 2422, and a second ring surface 242112 extending from the second clamping surface 242111 in a direction toward the second support side 2422. The first annular surface 233112 of each first boss 23311 is formed to gradually expand and extend from the first clamping surface 233111 of the first boss 23311 toward the first support side 2332. Correspondingly, the second ring surface 242112 of each second protrusion 24211 is formed to gradually expand and extend from the second clamping surface 242111 of the second protrusion 24211 towards the second support side 2422. It can be seen that the first ring surface 233112 of each first boss 23311 and the second ring surface 242112 of each second boss 24211 are both inclined ring surfaces, so that when the paper tray 100 is installed, the first ring surface 233112 and the second ring surface 242112 are inclined to guide the paper tray 100 when the paper tray 100 is clamped, so that the paper tray 100 can be directly guided to the corresponding first boss 23311 and second boss 24211 for fixation.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims

1. A thermal printer, comprising:

2. The thermal printer of claim 1, wherein the housing comprises:

a base plate;

3. The thermal printer according to claim 2, wherein the guide side plate is formed to extend obliquely from one end connected to the deck body to the other end, gradually in a direction away from the bottom plate, and one end of the guide side plate away from the deck body is higher than the paper tray in a full paper state.

4. A thermal printer according to claim 2 or 3, wherein the printer cartridge further comprises: the supporting plate is respectively connected with the guide side plate and the bottom plate;

5. The thermal printer according to claim 2, wherein a height of the front panel in a direction perpendicular to the base plate is smaller than a height of the rear panel in the direction perpendicular to the base plate;

the thermal printer further includes:

6. The thermal printer according to claim 5, wherein the paper feeding mechanism is provided on a side of the flip with respect to the rear panel;

7. The thermal printer according to claim 6, wherein the paper feeding mechanism comprises:

8. The thermal printer according to claim 2, further comprising: the paper clamping area cover plate and the paper feeding area cover plate are arranged along the length direction of the bottom plate and opposite to each other;

9. The thermal printer according to claim 2, wherein the paper clamping mechanism comprises:

the first paper clamping assembly is arranged on the first fixing plate;

the second paper clamping assembly is arranged on the second fixing plate;

10. The thermal printer of claim 9, wherein the first paper clamping assembly comprises:

the second paper clamping assembly comprises:

the paper disc base plate is arranged on the second fixing plate;

11. The thermal printer according to claim 10, wherein a side of the first paper-nipping protruding shaft remote from the stopper protrusion is a first nipping side that nips the paper tray, and a side of the first paper-nipping protruding shaft opposite to the stopper protrusion is a first supporting side that abuts the elastic member;

12. The thermal printer of claim 11, wherein each of said first bosses comprises: the first clamping surface is opposite to the first supporting side, and the first annular surface extends from the first clamping surface to the direction of the first supporting side;

13. A thermal printer according to claim 12, wherein said first annular surface of each said first boss is formed to extend progressively from said first clamping surface of said first boss towards said first support side;