阅读说明：本技术 一种转臂式开盖的热敏打印机 (Thermal printer with rotating arm type cover ) 是由 王春华 周颖 杨叶平 于 2019-10-18 设计创作，主要内容包括：本发明提供一种转臂式开盖的热敏打印机,包括机壳、纸仓盖、机芯和开盖单元,机芯包括装于纸仓盖的第一打印组件,开盖单元包括拨钮、第二转轴、锁紧架、转动臂和第一弹性件,拨钮具有杆体,杆体通过第一转轴与纸仓盖连接,杆体第一端可绕第一转轴转动至纸仓盖内,第二转轴、锁紧架、转动臂和第一弹性件均设于机壳内,锁紧架套装在第二转轴上,锁紧架具有可分离地与纸仓盖或第一打印组件勾合的第一钩合部,转动臂包括设有与锁紧架固定连接联动块和支臂,联动块套装在第二转轴上,拨钮第一端与支臂的伸出端邻接,第一弹性件的第一端与机壳连接,第一弹性件的第二端与锁紧架或支臂连接。该热敏打印机具有成像质量好且纸仓盖方便的优点。(The invention provides a heat-sensitive printer with a rotating arm type cover, which comprises a shell, a paper bin cover, a machine core and a cover opening unit, wherein the machine core comprises a first printing component arranged on the paper bin cover, the cover opening unit comprises a toggle button and a second rotating shaft, the locking frame, rotor arm and first elastic component, dial the button and have the body of rod, the body of rod is connected with the paper storehouse lid through first pivot, the first end of the body of rod can rotate to in the paper storehouse lid around first pivot, the second pivot, the locking frame, rotor arm and first elastic component all locate in the casing, the locking frame suit is in the second pivot, the locking frame has the detachable first portion of colluding with paper storehouse lid or first printing subassembly, the rotor arm is including being equipped with and locking frame fixed connection linkage block and support arm, linkage block suit is on the second pivot, dial the first end of button and the end that stretches out of support arm and adjoin, the first end and the casing of first elastic component are connected, the second end and the locking frame or the support arm of first elastic component are connected. The thermal printer has the advantages of good imaging quality and convenience in paper bin cover.)

1. A thermal printer with a rotary arm type cover comprises

A housing;

the fixed end of the paper bin cover is hinged with the shell;

the movement comprises a first printing assembly and a second printing assembly, the first printing assembly is arranged on the free end of the paper bin cover, and the second printing assembly is arranged in the shell;

characterized in that, the thermal printer still includes uncap the unit, uncap the unit and include:

the shifting button is provided with a rod body, the rod body is rotatably connected with the paper bin cover through a first rotating shaft, and the first end of the rod body can rotate around the first rotating shaft into the machine shell;

the second rotating shaft is arranged in the shell;

the locking frame is sleeved on the second rotating shaft and provided with a first hooking part, and the first hooking part can be detachably hooked with the paper bin cover or the first printing component;

the rotating arm comprises a linkage block and a support arm which are fixedly connected, the linkage block is sleeved on the first end of the second rotating shaft, the linkage block is fixedly connected with the locking frame, the support arm extends out of the linkage block, and the first end of the rod body is adjacent to the extending end of the support arm;

the first end of the first elastic piece is connected with the shell, and the second end of the first elastic piece is connected with the locking frame or the support arm.

2. The thermal printer according to claim 1, wherein:

along a first direction, the first rotating shaft is positioned between the second rotating shaft and an adjacent point of the toggle button and the support arm;

along a second direction, the adjacent point is located between the first rotating shaft and the second rotating shaft, and the first direction is perpendicular to the second direction.

3. The thermal printer according to claim 1, wherein:

the first end of the rod body faces towards the inner portion of the shell, an arc-shaped bulge is arranged in the shell, and the arc surface of the arc-shaped bulge is adjacent to the support arm.

4. The thermal printer according to claim 1, wherein:

the support arm has:

the ascending section extends from the linkage block towards the toggle button in an inclined mode;

the gentle section, the gentle section certainly the ascending section is kept away from the one end orientation of linkage piece the second end of dialling the button extends, the extending direction of ascending section with the contained angle between the extending direction of gentle section is the acute angle.

5. The thermal printer according to claim 1, wherein:

the paper bin cover is provided with:

the mounting part is provided with a mounting position, the rod body is arranged in the mounting position, the mounting part is provided with a through hole along the axial direction of the first rotating shaft, the through hole penetrates through the mounting position, and the first rotating shaft is mounted in the through hole;

the locking part is located at the end part of the first rotating shaft, the locking part is provided with a clamping jaw, and the clamping jaw is connected with a first clamping groove in the first rotating shaft in a clamping mode.

6. The thermal printer according to claim 1, wherein:

the shell is arranged at the first end of the second rotating shaft and is provided with a limiting block, and the limiting block is adjacent to the linkage block.

7. The thermal printer according to claim 1, wherein:

the second rotating shaft is rotatably connected with the shell around the axis of the second rotating shaft;

the first end of the second rotating shaft is provided with a first clamping part, the linkage block is provided with a second clamping groove, and the first clamping part is clamped with the second clamping groove;

the second end of second pivot has second joint portion, the locking frame is in the second end department of second pivot is provided with the third draw-in groove, second joint portion with third draw-in groove joint.

8. The thermal printer according to any one of claims 1 to 7, wherein:

the first elastic piece is a tension spring, and two ends of the first elastic piece are respectively connected with the shell and the locking frame; or

The first elastic piece is a compression spring and is positioned below the support arm, and two ends of the first elastic piece are respectively abutted against the shell and the support arm.

9. The thermal printer according to any one of claims 1 to 7, wherein:

the paper bin cover is provided with a pin, and the first hooking part is detachably hooked with the pin; or

The first printing component is provided with a second hooking part, and the first hooking part can be detachably hooked with the second hooking part.

10. The thermal printer according to any one of claims 1 to 7, wherein:

the thermal printer further comprises a second elastic piece, the second elastic piece is connected between the paper bin cover and the machine shell, and the second elastic piece drives the paper bin cover to be far away from the machine shell to rotate.

Technical Field

The invention relates to the technical field of printers, in particular to a thermal printer with a rotating arm type cover.

Background

The thermal printer is mainly used for printing transaction receipts, bills, labels and the like, and therefore is widely applied to the fields of retail industry, catering industry, logistics industry and the like, and due to the particularity of the industries, the use frequency of the thermal printer is far higher than that of a conventional commercial printer, so that the paper bin cover of the thermal printer needs to be opened frequently to replace or add a printing paper roll, and the paper bin cover of the existing thermal printer is opened mainly in the following two modes:

firstly, the paper storehouse lid relies on self to receive the gravity lid to close on thermal printer's paper storehouse, when changing or adding the printing scroll, directly pull the paper storehouse lid by hand and make it be open mode, change or the interpolation of printing the scroll afterwards to accomplish the change or the interpolation back of printing the scroll, close the paper storehouse lid again on the paper storehouse, but this kind of mode of uncapping has a great deal of inconvenience when making to change printing paper, and can't be reliable sometimes pulls the paper storehouse lid and makes it open. The printing assembly of the existing thermal printer mainly comprises a thermal sensitive sheet and a rubber roller, and the replacement or addition of the paper roll is convenient to print, most thermal printers can set the printing assembly into a split structure at present, namely one of the thermal sensitive sheet and the rubber roller is installed on a shell, the other one is installed on a paper bin cover, so that the paper bin cover is opened, the thermal sensitive sheet is separated from the rubber roller, the paper bin cover is closed, the thermal sensitive sheet is attached to the rubber roller, a printing channel is formed, and the printing paper roll passes through the printing channel to perform image forming. Whether the thermosensitive sheet is reliably attached to the rubber roller or not can directly affect the printing quality, and after the paper bin cover is closed due to the unreliable opening mode of the paper bin cover, the thermosensitive sheet is reliably attached to the rubber roller, so that the printed patterns are partially lost, and the imaging quality is affected.

The second one sets up the locked groove on casing and the paper storehouse lid of thermal printer, sets up locking mechanism on the other, and locking mechanism includes the latch hook that locking button and locking button linked, and locking button is used for controlling latch hook and locked groove lock or control latch hook and locked groove to break away from, when needs are changed or are added and print the scroll, breaks away from the locked groove through locking button control latch hook to make the paper storehouse lid open. When the paper storehouse lid is closed to needs, with the paper storehouse lid closure on the casing, make the latch hook lock on the locked groove, thereby realize closing of paper storehouse lid, and its locking mechanism of this kind of mode all sets up on same main part, all set up on the casing or all set up on the paper storehouse lid promptly, lead to when opening the paper storehouse lid, if the force undersize of exerting to the locking button, the latch hook can't break away from with the locked groove, when exerting the too big force to the locking button, the impact force that the paper storehouse lid was opened is too big, thereby cause whole thermal printer to take place violent shake or beat.

Disclosure of Invention

In order to solve the above problems, the present invention provides a thermal printer with a pivotable cover, which has a good image quality and a convenient paper compartment cover.

In order to achieve the main object of the present invention, the present invention provides a thermal printer with a cover pivoted on a fixed end of a paper compartment cover, the thermal printer comprising a casing, a paper compartment cover and a core, wherein the fixed end of the paper compartment cover is hinged on the casing, the core comprises a first printing component and a second printing component, the first printing component is mounted on a free end of the paper compartment cover, the second printing component is mounted in the casing, the cover opening unit comprises a toggle button, a second rotating shaft, a locking frame, a rotating arm and a first elastic component, the toggle button comprises a rod body, the rod body is rotatably connected with the paper compartment cover through the first rotating shaft, a first end of the rod body can rotate around the first rotating shaft into the casing, the second rotating shaft is mounted in the casing, the locking frame is sleeved on the second rotating shaft, the locking frame is provided with a first hooking portion, the first hooking portion can be detachably hooked with the paper compartment cover or the first printing component, the rotating arm comprises a fixedly connected linkage block and a support arm, the linkage block is sleeved on the first end of the second rotating shaft and fixedly connected with the locking frame, the support arm extends out from the linkage block, the first end of the rod body is adjacent to the extending end of the support arm, the first end of the first elastic piece is connected with the shell, and the second end of the first elastic piece is connected with the locking frame or the support arm.

From top to bottom, through the structural design to the unit of uncapping for when the paper storehouse lid is opened to needs, only need dial the button through stirring, make the second end of dialling the button support the support arm of rotor arm, rotate around the second pivot with the synchronous drive locking frame of control rotor arm, thereby make the first portion of colluding of locking frame break away from the paper storehouse lid or to the locking of first printing subassembly, the paper storehouse lid can rotate the change of opening in order to print the scroll or add relatively to the casing this moment. After the change or the addition of printing the scroll when accomplishing, partly overlap joint that will beat printing paper is in second printing element department, cover the casing with the paper storehouse afterwards, the lid closes the back, the locking frame makes the first portion of colluding of self collude on the tip of paper storehouse lid or first printing element under the effect of first elastic component, with paper storehouse lid locking on the casing, still make first printing element hug closely the second printing element simultaneously, thereby guarantee thermal printer's formation of image quality, the disappearance appears in the image of avoiding printing. In addition, through the position setting to the cover opening unit, can avoid the paper storehouse lid to open and produce too big impact force to prevent that the paper storehouse lid from opening the in-process, whole thermal printer from taking place violent shake or beating.

Preferably, the first rotating shaft is located between the second rotating shaft and an adjacent point of the toggle button and the support arm along the first direction, the adjacent point is located between the first rotating shaft and the second rotating shaft along the second direction, and the first direction is perpendicular to the second direction.

It is from top to bottom visible, through above-mentioned setting, can further avoid the paper storehouse lid to open and produce too big impact force to prevent that the paper storehouse lid from opening the in-process, whole thermal printer from taking place violent shake or beating. In addition, can also make more laborsaving when dialling the button to make the paper storehouse lid open more level and smooth, improve and feel and user experience.

Preferably, an arc-shaped protrusion is arranged in the first end of the rod body facing the casing, and the arc surface of the arc-shaped protrusion is adjacent to the support arm.

It is from top to bottom visible, the arc arch can be appropriate reduce the frictional force when dialling relative movement between button and the rotor arm, and the arc arch can also increase the interval between the body of rod and the support arm to reduce the volume of the body of rod.

Another preferred scheme is that the support arm has ascending section and gentle section, and the ascending section inclines from the linkage piece and extends towards dialling the button, and the gentle section is kept away from the one end of linkage piece from the ascending section and is extended towards the second end of dialling the button, and the contained angle between the extending direction of ascending section and the extending direction of gentle section is the acute angle.

From top to bottom, above-mentioned structural design makes to dial the button and can carry out great rotation with less turned angle drive rotor arm to the required space when sparingly dialling the button rotation, thereby reduces thermal printer's volume, and plays the optimal action to thermal printer's structural design.

Another preferred scheme is, be provided with installation department and locking portion on the paper storehouse lid, the installation department has the installation position, and the body of rod setting is in the installation position, and the installation department is provided with the through-hole along the axial of first pivot, and the through-hole runs through the installation position, and first pivot is installed in the through-hole, and locking portion is located the tip of first pivot, and locking portion has the jack catch, jack catch and the epaxial first draw-in groove joint of first pivot.

It is thus clear that the installation position both had been used for holding the partial structure of dialling the button and carried out spacingly, played the guide effect to the rotation of dialling the button again, still made the equipment of dialling button and silo lid simpler, convenient simultaneously. And the locking part is used for being matched with a first clamping groove on the first rotating shaft to fix the first rotating shaft, so that the first rotating shaft is prevented from being separated from the connection with the shifting button and the paper bin cover.

Another preferred scheme is that a limit block is arranged at the first end of the second rotating shaft of the machine shell, and the limit block is adjacent to the linkage block.

It is from top to bottom seen that the stopper is spacing to the linkage piece, prevents the rotor arm along the axial displacement of second pivot to guarantee the reliability of the unit action of uncapping.

Another preferred scheme is that the second rotating shaft is rotatably connected with the casing around the axis of the second rotating shaft, a first clamping portion is arranged at the first end of the second rotating shaft, a second clamping groove is formed in the linkage block, the first clamping portion is clamped with the second clamping groove, a second clamping portion is arranged at the second end of the second rotating shaft, a third clamping groove is formed in the second end of the second rotating shaft, and the second clamping portion is clamped with the third clamping groove.

It is from top to bottom visible, the linkage piece drives the second pivot through second draw-in groove and first joint portion and carries out synchronous rotation to make the second pivot drive the locking frame through second joint portion and third draw-in groove and carry out synchronous rotation, thereby the second connecting portion of cooperation linkage piece is to the drive of locking frame, has both reduced the torsion that the locking frame received in the rotation process, can make the linkage response of rotating turret more reliable and rapid again.

The further proposal is that the first elastic piece is a tension spring, and two ends of the first elastic piece are respectively connected with the shell and the locking frame; or the first elastic piece is a compression spring and is positioned below the support arm, and two ends of the first elastic piece are respectively abutted against the shell and the support arm.

From the above, the type of the first elastic member can be modified according to the position where the first elastic member is disposed.

The paper bin cover is provided with a pin, and the first hooking part is detachably hooked with the pin; or the first printing component is provided with a second hooking part, and the first hooking part can be detachably hooked with the second hooking part.

In a further aspect, the thermal printer further includes a second elastic member, the second elastic member is connected between the paper compartment cover and the housing, and the second elastic member drives the paper compartment cover to rotate away from the housing.

It can be seen from above that, the second elastic component is used for assisting the paper bin cover to open for when the locking frame relieves the locking to the rubber roll, the second elastic component can assist the paper bin cover to open through the elasticity of self.

Drawings

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

Fig. 2 is a first omitted component block diagram of the thermal printer according to the first embodiment of the present invention.

Fig. 3 is a structural view of a thermal printer according to a second embodiment of the present invention with some components omitted.

Fig. 4 is a diagram showing an opened state of the paper deck cover of the first embodiment of the thermal printer of the present invention.

Fig. 5 is a first structural view of a thermal sheet of the first embodiment of the thermal printer according to the present invention.

Fig. 6 is an enlarged view at a in fig. 2.

FIG. 7 is a view showing a connection structure between the cover and the dial knob of the thermal printer according to the first embodiment of the present invention.

Fig. 8 is a structural view of a cover opening mechanism of the first embodiment of the thermal printer of the present invention.

Fig. 9 is an exploded view of the cover opening mechanism of the first embodiment of the thermal printer of the present invention with some components omitted.

Fig. 10 is an exploded view of a third omitted part of the thermal printer according to the first embodiment of the present invention.

Fig. 11 is a schematic diagram showing the relative positions of the microswitch and the paper deck cover of the first embodiment of the thermal printer according to the invention.

Fig. 12 is a schematic view showing the arrangement of the first elastic member of the first embodiment of the thermal printer according to the present invention.

Fig. 13 is an exploded view of a fourth embodiment of the thermal printer of the present invention with some components omitted.

Fig. 14 is a structural view of an inner casing of the first embodiment of the thermal printer of the present invention.

Fig. 15 is a fifth embodiment of the thermal printer according to the present invention, with some components omitted.

Fig. 16 is a first structural view of a carriage of the first embodiment of the thermal printer of the present invention.

Fig. 17 is a second structural view of the carriage of the first embodiment of the thermal printer of the present invention.

Fig. 18 is a second structural view of the thermal sheet of the first embodiment of the thermal printer of the present invention.

Fig. 19 is a partial structural view of an inner case of the first embodiment of the thermal printer of the present invention.

Fig. 20 is a schematic view showing the arrangement of the second elastic member of the second embodiment of the thermal printer according to the present invention.

The invention is further explained with reference to the drawings and the embodiments.

Detailed Description

First embodiment of thermal printer:

referring to fig. 1 to 3, a thermal printer 100 includes a casing 1, a paper deck cover 2, a deck 3, and an uncovering unit 4.

The casing 1 comprises an outer casing 11 and an inner casing 12, the outer casing 11 is provided with a containing cavity, the inner casing 12 is detachably embedded in the containing cavity of the outer casing 11, the inner casing 12 is provided with a paper bin 120, the paper bin 120 is used for storing printing paper rolls, and the fixed end of a paper bin cover 2 is hinged with the casing 1, so that the paper bin cover 2 can be opened or closed relative to the casing 1, and the paper bin cover 120 can be opened or closed.

With reference to fig. 4 and 5, the movement 3 is in a split type arrangement, the movement 3 includes a first printing component and a second printing component, the first printing component is installed on the free end of the paper bin cover 2, the second printing component is installed on the inner shell 12, wherein when the first printing component is a rubber roller, the second printing component is a thermal sensitive sheet; when the first printing component is a thermal sensitive sheet, the second printing component is a rubber roller.

In this embodiment, the first printing component is a rubber roller 31, and the second printing component is a thermal sensitive sheet 32, wherein the rubber roller 31 is rotatably mounted on the free end of the paper compartment cover 2 around its own axis, the thermal sensitive sheet 32 is fixedly mounted on the inner shell 12, and the thermal sensitive sheet 32 is provided with two blocks 321, and the two blocks 321 are respectively located at two ends of the thermal sensitive sheet 32. When the paper bin cover 2 is covered on the machine shell 1, the rubber roller 31 is abutted to the heat-sensitive sheet 32, and a printing channel is formed between the rubber roller 31 and the heat-sensitive sheet 32, so that when printing paper passes through the printing channel, the machine core 3 can perform imaging on the printing paper.

Referring to fig. 6, the door opening unit 4 includes a dial button 41, a first rotating shaft 42, a second rotating shaft 43, a locking bracket 44, a rotating arm 45, and a first elastic member 46.

Referring to fig. 7, the paper bin cover 2 is provided with an installation portion 21 and a locking portion 22, the installation portion 21 has an installation position, and the installation portion 21 is provided with a through hole along the axial direction of the rubber roller 31, and the through hole penetrates through the installation position. The locking portion 22 is located at one end of the through hole, and the locking portion 22 has a claw 221.

The rod body 411 of the dial button 41 is installed on the paper compartment cover 2 through the first rotating shaft 42, specifically, the dial button 41 has the rod body 411, and the rod body 411 is located in the installation position, so that the installation position can play a role in guiding and limiting the rod body 411. The first rotating shaft 42 penetrates through the rod 411 and is located in the through hole, so that the toggle button 41 can rotate around the axis of the first rotating shaft 42. Wherein, first pivot 42 is provided with first draw-in groove 421 in the one end that lies in locking portion 22, after first pivot 42 runs through the body of rod 411 and installs in the through-hole, make first draw-in groove 421 on the first pivot 42 and the jack catch 221 joint of locking portion 22 to fix first pivot 42, prevent that first pivot 42 from breaking away from and dialling button 41, the connection of paper storehouse lid 2, simultaneously, above-mentioned structural design still sets up the equipment between dialling button 41 and the paper storehouse lid 2 more convenient.

The second end of the rod 411 is provided with an operating portion 412, the operating portion 412 is located above the paper compartment cover 2, and the operating portion 412 is used for providing a force application point for a user, so that the user can easily pull the toggle button 41 around the shaft end of the first rotating shaft 42 through the operating portion 412. The first end of the rod 411 can rotate around the first rotating shaft 42 to the accommodating cavity of the casing 1, so that the first end of the rod 411 is linked with the locking frame 44.

Referring to fig. 8 and 9, in the present embodiment, the second rotating shaft 43, the locking bracket 44, the rotating arm 45 and the first elastic member 46 are disposed in the accommodating cavity of the casing 1. The second rotating shaft 43 is parallel to the rubber roller 31, and the locking frame 44 is sleeved on the second rotating shaft 43. The locking frame 44 has two opposite first hooking portions 441, the two first hooking portions 441 are distributed along the axial direction of the second rotating shaft 43, the rotating arm 45 is respectively linked with the second rotating shaft 43 and the locking frame 44 to drive the first hooking portions 441 to detachably hook the first printing component, that is, the end portion of the rubber roller 31 forms the second hooking portion, and the first hooking portions 441 are detachably hooked on the end portion of the rubber roller 31.

Specifically, the rotating arm 45 includes a linkage block 451 and a support arm 452, the linkage block 451 and the support arm 452 are integrally formed, the linkage block 451 is sleeved on the first end of the second rotating shaft 43, a second connecting portion 4512 is disposed on the linkage block 451, and the second connecting portion 4512 is disposed toward the locking frame 44. The locking frame 44 is correspondingly provided with a first connecting portion 442, and the first connecting portion 442 is fixedly connected with a second connecting portion 4512, so that the locking frame 44 and the rotating arm 45 are linked. In this embodiment, the first connecting portion 442 is a connecting hole, the second connecting portion 4512 is a pin, and the pin is inserted into the connecting hole, so that when the rotating arm 45 rotates around the axis of the second rotating shaft 43, the locking frame 44 can be driven by the first connecting portion 442 and the second connecting portion 4512 to rotate around the axis of the second rotating shaft 43 synchronously. The housing 11 is provided with a limiting block 111 at the first end of the second rotating shaft 43, and the limiting block 111 is adjacent to the linkage block 451 to limit the linkage block 451, so as to prevent the rotating arm 45 from moving along the axial direction of the second rotating shaft 43, and ensure reliable linkage between the first connecting portion 442 and the second connecting portion 4512, thereby ensuring reliability of the action of the lid opening unit 4.

As shown in fig. 6, the supporting arm 452 extends from the linkage block 451 toward the dial 41, such that the first end of the dial 41 abuts against the extending end of the supporting arm 452, when the dial 41 rotates around the first rotating shaft 42, the first end of the rod 411 can move towards the accommodating cavity of the housing 1 and simultaneously press down the supporting arm 452, such that the supporting arm 452 drives the linkage block 451 to rotate around the second rotating shaft 43, such that the rotating arm 45 drives the locking frame 44 to rotate around the second rotating shaft, and the first hooking portion 441 of the locking frame 44 releases the locking of the rubber roller 31.

Along the first direction X1, the first rotating shaft 42 is located between the second rotating shaft 43 and the adjacent point of the toggle button 41 and the support arm 452; the abutting point of the toggle button 41 and the support arm 452 is located between the first rotating shaft 42 and the second rotating shaft 43 along the second direction X2, and the first direction X1 is perpendicular to the second direction X2.

Preferably, the supporting arm 452 has an ascending segment 4521 and a flat segment 4522 extending from the linkage block 451 obliquely toward the dial knob 41 in the third direction X3, and the flat segment 4522 extends from an end of the ascending segment 4521 away from the linkage block 451 toward the first end of the dial knob 41 in the fourth direction X4, wherein an angle between the extending direction of the ascending segment 4521 and the extending direction of the flat segment 4522 is acute. By designing the support arm 452 with the above structure, the toggle button 41 can drive the rotating arm 45 to rotate by a larger angle with a smaller rotating angle, so as to reduce the space required by the toggle button 41 when rotating, thereby reducing the volume of the thermal printer 100 and optimizing the structural design of the thermal printer 100.

Further, an arc-shaped protrusion 413 is arranged in the accommodating cavity of the first end of the rod 411 facing the housing 1, the arc surface of the arc-shaped protrusion 413 is adjacent to the gentle section 4522 of the support arm 452, the arrangement of the arc-shaped protrusion 413 can appropriately reduce the friction force when the toggle button 41 and the rotating arm 45 move relatively, and the arc-shaped protrusion 413 can also increase the distance between the rod 411 and the support arm 452, so as to reduce the volume of the rod 411. Of course, a roller may be further disposed at the first end of the dial button 41, and the axis of the roller is parallel to the axis of the rubber roller 31, so that the sliding friction between the dial button 41 and the rotating arm 45 is changed into rolling friction, so that the user can more save effort when dialing the dial button 41.

In addition, in this embodiment, the second rotating shaft 43 is rotatably connected to the inner housing 12 around its axis, the first end of the second rotating shaft 43 has a first clamping portion 431, the linkage block 451 is provided with a second clamping groove 4511, and the second clamping groove 4511 is clamped with the first clamping portion 431. The second end of the second rotating shaft 43 is provided with a second clamping portion 432, and the locking bracket 44 is provided with a third clamping groove 443 at the second end of the second rotating shaft 43, and the third clamping groove 443 is clamped with the second clamping portion 432. It can be seen that, this structural design makes linkage block 451 can drive second pivot 43 through second draw-in groove 4511 and first joint portion 431 and rotate in step to make second pivot 43 drive locking frame 44 through second joint portion 432 and third draw-in groove 443 and rotate in step, thereby the second connecting portion 4512 of cooperation linkage block 451 drives locking frame 44, in order to reduce the torsion that locking frame 44 received in the rotation process, and make the linkage response between rotating frame and the rotor arm 45 more reliable and rapid.

The first end of the first elastic element 46 is connected with the inner shell 12, the second end of the second elastic element 6 is connected with the locking frame 44, and the first elastic element 46 is used for driving the first hooking part 441 of the locking frame 44 to move towards the heat-sensitive sheet 32, so that when the paper bin cover 2 is in a closed state, the first hooking part 441 of the locking frame 44 is hooked on the end part of the rubber roller 31 to lock the rubber roller 31, and the paper bin cover 2 is locked to prevent the paper bin cover 2 from being opened. In this embodiment, the first elastic member 46 is a tension spring.

Referring to fig. 10, the inner housing 12 is provided with a limiting groove 121 at a second connecting portion 4512 of the linkage block 451, and the second connecting portion 4512 penetrates through the limiting groove 121 and then is connected to the first connecting portion 442 of the locking bracket 44. The second connecting portion 4512 can move in the limiting groove 121 around the axis of the second rotating shaft 43, and the limiting groove 121 is used for limiting the rotation of the rotating arm 45 to prevent the rotating arm 45 from rotating excessively towards the heat sensitive sheet 32, so that when the paper bin cover 2 is covered, the rubber roller 31 on the paper bin cover 2 can be accurately clamped into the first hooking portion 441.

Preferably, the end of the first hooking part 441 facing the rubber roller 31 is provided with a guide surface, which is obliquely disposed facing the rubber roller 31 and the heat-sensitive sheet 32. The guide surface is used for guiding the rubber roller 31 when the paper bin cover 2 is closed, and the rubber roller 31 can push the locking frame 44 to move back to the heat-sensitive sheet 32 through the guide surface, so that the rubber roller 31 can be smoothly clamped into the first hooking part 441.

Referring to fig. 11, the thermal printer 100 further includes a micro switch 5, the micro switch 5 is mounted on the inner housing 12 and located in the accommodating chamber, and the inner housing 12 is provided with an opening at a driving end of the micro switch 5 so that the driving end of the micro switch 5 can protrude into the opening. The paper bin cover 2 is provided with a contact block 23 extending towards the opening, and the contact block 23 is detachably connected with the contact end of the micro switch 5, so that when the paper bin cover 2 is covered on the machine shell 1, the contact block 23 can be contacted with the driving end of the micro switch 5 and can press down the driving end of the micro switch 5. The microswitch 5 is used for detecting the opening and closing conditions of the paper bin cover 2 so as to ensure that the printing operation is carried out after the paper bin cover 2 is closed in place, thereby ensuring the imaging quality of the thermal printer 100 and ensuring the safe use of the thermal printer 100.

Referring to fig. 12, the thermal printer 100 further includes a second elastic member 6, the second elastic member 6 is connected between the casing 1 and the paper compartment cover 2, and the second elastic member 6 is used for driving the paper compartment cover 2 to rotate away from the casing 1. In this embodiment, the second elastic member 6 is a torsion spring, and the torsion spring is sleeved on the rotating shaft between the paper compartment cover 2 and the casing 1. The second elastic member 6 may assist the opening of the paper compartment cover 2, so that when the locking bracket 44 releases the locking of the rubber roller 31, the second elastic member 6 can assist the opening of the paper compartment cover 2 by its own elastic force.

As shown in fig. 13, the thermal printer 100 further includes a photoelectric sensor 9, the photoelectric sensor 9 is located at an upstream end of the deck 3 in a paper feeding direction of the thermal printer 100, and the photoelectric sensor 9 is used for detecting printing paper, such as a position of printing paper, presence or absence of printing paper, and the like. In order to facilitate the installation of the thermal sheet 32 and the photoelectric sensor 9, the thermal printer 100 is further provided with a bracket 7 for installing and fixing the thermal sheet 32 and the sensor, and for optimizing the design of the inner case 12.

Specifically, in conjunction with fig. 14, the inner casing 12 is provided with a mounting location 122 at a disposal interface of the paper bin 120, the mounting location 122 is used for providing a mounting space for the heat sensitive sheet 32, and the mounting location 122 penetrates the inner casing 12 towards the bottom of the machine casing 1, so that the mounting location 122 is communicated with the accommodating cavity. In addition, the two ends of the mounting position 122 are respectively provided with a clamping groove 123, when the heat-sensitive sheet 32 is mounted, the heat-sensitive sheet 32 of the heat-sensitive sheet 32 passes through the mounting position 122 and extends into the accommodating cavity, and meanwhile, one clamping block 321 on the heat-sensitive sheet 32 is clamped in one clamping groove 123.

With reference to fig. 15 to 17, the bracket 7 is located below the mounting position 122, i.e. the bracket 7 is disposed in the receiving cavity. The bracket 7 includes a connecting portion 71, a supporting portion 72, and a mounting portion 73, wherein the connecting portion 71, the supporting portion 72, and the mounting portion 73 are integrally molded, and the supporting portion 72 is connected between the connecting portion 71 and the mounting portion 73. The connecting portion 71 is fixedly connected to the inner case 12 by a bolt, thereby fixedly mounting the bracket 7 to the inner case 12. The supporting portion 72 has a first clamping position 721, and the thermal sensitive chip 32 is disposed in the first clamping position 721, so that a part of the thermal sensitive chip 32 is clamped, and the first clamping position 721 limits and supports the thermal sensitive chip 32. Preferably, have third joint position 731 on the installation department 73, the joint of photoelectric sensor 9 is in third joint position 731, through set up third joint position 731 on installation department 73 for photoelectric sensor 9's installation is more convenient, thereby removes the trouble that needs fix photoelectric sensor 9 on bracket 7 through the bolt from.

The inner casing 12 is provided with a through hole 124, and the through hole 124 is located at the upstream end of the rubber roller 31 in the paper feeding direction of the thermal printer 100. When the bracket 7 is fixed on the inner shell 12, the sensing end of the photoelectric sensor 9 can be just positioned in the through hole 124. Preferably, the supporting portion 72 is provided with a limiting component 723, the limiting component 723 comprises two oppositely arranged limiting blocks, the first clamping position 721 is formed between the two limiting blocks, and by arranging the limiting component 723, the supporting portion 72 can have a more free structural design space, and meanwhile, the installation portion 73 can be accurately aligned with the through hole 124.

The mounting position 122 is matched with the supporting portion 72 of the bracket 7, so that the heat-sensitive sheet 32 can be quickly disassembled and assembled, wherein the clamping groove 123 of the mounting position 122 can limit the heat-sensitive sheet 32 through the clamping block 321 of the heat-sensitive sheet 32, and the first clamping position 721 on the supporting portion 72 of the bracket 7 can limit the heat-sensitive sheet 32 and support the heat-sensitive sheet 32. In addition, the mounting portion 73 of the bracket 7 is provided with a third clamping position 731 for mounting the photoelectric sensor 9, so that when the bracket 7 is mounted on the inner shell 12, the temperature-sensitive sheet 32 can be limited, and the photoelectric sensor 9 can be mounted at a specified position at the same time, so that the sensing end of the photoelectric sensor 9 is positioned in the through hole 124 of the inner shell 12, thereby simplifying the mounting steps and the structure of the casing 1, avoiding the need of manufacturing an additional connecting frame to fix the photoelectric sensor 9, and reducing the production cost.

Preferably, the card slot 123 includes a first groove 1231 and a second groove 1232, the first groove 1231 and the second groove 1232 communicate with each other, the first groove 1231 extends toward the bottom of the housing case 1, the second groove 1232 extends toward the glue roller 31, and the second groove 1232 is located at one end of the first groove 1231 near the bottom of the housing case 1. When the heat-sensitive strip 32 is installed, the fixture block 321 of the heat-sensitive strip 32 slides into the second groove 1232 from the first groove 1231, wherein the fixture block 321 can move along the moving distance in the second groove 1232, so that the position between the heat-sensitive strip 32 and the rubber roller 31 can be adjusted. The heat-sensitive sheet 32 can be tightly attached to the rubber roller 31, a spring is arranged between the inner shell 12 and the heat-sensitive sheet 32 and abutted between the inner shell 12 and the heat-sensitive sheet 32, and the spring is used for driving the heat-sensitive sheet 32 to move towards the rubber roller 31 along the second groove part 1232, so that when the paper bin cover 120 is closed, the heat-sensitive sheet 32 is tightly contacted with the rubber roller 31. Here, the spring is preferably a compression spring, but of course, the type of the spring may be suitably set according to the structure of the mounting position 122, the mounting space of the heat sensitive strip 32, and the movable space of the heat sensitive strip 32, for example, when the movable space of the heat sensitive strip 32 is small, the type of the spring may be changed to a spring.

In order to avoid the spring falling into the accommodating cavity, a support plate 125 may be disposed in the mounting position 122, and the support plate 125 is located below the spring, so that the support plate 125 supports and limits the spring, and the spring is prevented from falling into the housing 11 from the mounting position 122, thereby ensuring the reliability of the thermal printer 100 during printing. And the connecting portion 71 of the bracket 7 can be connected with the support plate 125.

Further, with reference to fig. 18, a second clamping position 126 may be disposed on a side of the mounting position 122 facing the paper bin 120, and a connection column 322 may be disposed on a side of the thermal sensitive sheet 32 facing the mounting position 122, so that when the spring is mounted, a first end of the spring is clamped in the second clamping position 126, and a second end of the spring is sleeved on the connection column 322, so that the spring is further limited by the cooperation between the second clamping position 126 and the connection column 322. Of course, when the second clamping position 126 is provided at the mounting position 122 and the connection post 322 is provided on the thermal sensitive strip 32, the support plate 125 in the mounting position 122 may be eliminated.

In addition, in order to avoid the spring from popping out from the upper side of the mounting position 122 under the action of the self elastic force and limit the position of the thermal sensitive sheet 32, the casing 1 of the thermal printer 100 is further provided with a cover plate 8, the cover plate 8 covers the spring and the thermal sensitive sheet 32 of the thermal sensitive sheet 32, and two ends of the cover plate 8 are respectively clamped in the first groove portions 1231, so that the clamping block 321 of the thermal sensitive sheet 32 is prevented from sliding out of the clamping groove 123 from the first groove portions 1231. Of course, in order to ensure the reliability of the connection between the cover plate 8 and the inner shell 12, the cover plate 8 and the inner shell 12 may be fixedly connected by bolts.

Furthermore, as shown in fig. 16 and 17, the supporting portion 72 of the bracket 7 further has an avoiding position 722, the avoiding position 722 penetrates through the supporting portion 72, and the arrangement of the avoiding position 722 enables the flat cable of the thermal sensitive strip 32 to directly pass through the bracket 7 without entering a special routing process, so that the flat cable can be electrically connected with the control circuit board of the thermal printer 100 better and more conveniently.

Referring to fig. 19, the mounting portion 73 of the bracket 7 is further provided with positioning holes 732, and the inner case 12 is provided with positioning posts 127 at the mounting portion 73, and the positioning posts 127 are inserted into the positioning holes 732 when the bracket 7 is mounted to the inner case 12. The matching of the positioning posts 127 and the positioning holes 732 can position the bracket 7 during the installation of the bracket 7, and can improve the tightness and reliability of the connection between the bracket 7 and the inner shell 12 after the bracket 7 is installed, thereby ensuring that the photoelectric sensor 9 can reliably work.

Furthermore, a first contact block 128 is provided at the connection point of the positioning post 127 and the inner housing 12, the first contact block 128 is adjacent to the mounting portion 73 of the bracket 7, and a second contact block 129 is provided at the mounting portion 73 of the inner housing 12, and the second contact block 129 is also adjacent to the mounting portion 73. The first contact block 128 and the second contact block 129 are disposed to support the mounting portion 73 of the bracket 7, so that the structure of the inner case 12 can be simplified and the amount of material used for manufacturing the inner case 12 can be reduced.

Second embodiment of thermal printer:

referring to fig. 20, the present embodiment is different from the first embodiment of the thermal printer in that:

the first elastic member 460 is a compression spring, the compression spring is located below the gentle section of the supporting arm 450, and two ends of the first elastic member 460 are respectively abutted against the casing 10 and the supporting arm. In the embodiment, the type of the first elastic element 460 and the position of the first elastic element 460 are set, so that the first elastic element 460 can be assembled conveniently, and the structure of the housing can be simplified to a certain extent.

Similarly, the second elastic member may also be configured as a compression spring, and the second elastic member is disposed on the casing. When the second elastic element is a compression spring, the second elastic element can be arranged at the hinged position of the paper bin cover and the machine shell, and can also be arranged at the free end of the machine shell close to the paper bin cover.

Third embodiment of thermal printer:

the present embodiment differs from the first embodiment or the second embodiment of the thermal printer in that:

the paper bin cover is provided with a pin, and the first hooking part of the locking frame is detachably hooked with the pin.

Fourth embodiment of thermal printer:

this embodiment is different from the first embodiment of the thermal printer in that:

the first printing component is a thermosensitive sheet, and the second printing component is a rubber roller.

The paper bin cover is provided with a pin, and the first hooking part of the locking frame is detachably hooked with the pin; or the heat sensitive sheet is provided with a second hooking part, and the first hooking part of the locking frame can be detachably hooked with the second hooking part.

In conclusion, the invention can fasten the rubber roller on the thermal sensitive sheet when the paper bin cover is in a closed state so as to improve the imaging quality of the thermal printer, can make the opening of the paper bin cover more convenient, and can avoid overlarge impact force generated by the opening of the paper bin cover, thereby preventing the whole thermal printer from shaking or jumping violently in the process of opening the paper bin cover.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.