Thermal printer

Abstract

The utility model discloses a thermal printer, which comprises a main body part and a cover assembly rotationally arranged on the main body part, the uncovering structure comprises a first clamping part, a second clamping part, a first elastic reset piece and an unlocking piece, and when the unlocking piece is pushed to move, the first clamping part and the second clamping part are changed into a separation state from a joint state; the two ends of the thermal printer in the length direction are a connecting end and an opening end respectively, a rotating shaft, rotating relative to the main body part, of the cover assembly is arranged at the connecting end, and the first clamping part, the second clamping part and the unlocking piece are arranged at the opening end. The cover opening device has the advantages of being simple in cover opening structure and convenient to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of printing, and in particular relates to a thermal printer. Background Art

[0002] Thermal printers use a print head with a heating element to heat the print medium with heat-sensitive materials to form the required text or pattern. Most thermal printers are set in a rectangular shape, and the width direction of the print medium is parallel to the length direction of the thermal printer to meet the requirements of miniaturization, so that the printed thermal paper and other print media are output from the top or front side of the thermal printer. Generally, thermal printers have a main body and a cover or cover assembly. When changing the print medium or other operations, the cover or cover assembly needs to be opened to proceed to the next step.

[0003] The cover opening structure of existing thermal printers mostly adopts a lever-type push-pull method, and its cover assembly is mostly rotatably fixed on the main body, wherein the rotation axis of the cover assembly is generally parallel to the length direction of the thermal printer, which is relatively laborious for the user experience, especially when encountering models with wider printing media and longer printers, or when the user has smaller hands, it is very inconvenient to open the cover, or it requires more force to push and pull the cover to open. Therefore, a cover opening structure that is easier to open is needed. Summary of the invention

[0004] In view of the problems existing in the prior art, the main purpose of the utility model is to provide a thermal printer whose cover assembly is easy to open.

[0005] In order to achieve the above-mentioned main purpose, the utility model provides a thermal printer, including a main body and a cover assembly rotatably arranged on the main body; the cover assembly is provided with a first clamping part, and the main body is provided with a second clamping part, and the first clamping part can move relative to the second clamping part; a first elastic return member is configured to act on the first clamping part or the second clamping part to keep the first clamping part and the second clamping part in an engaged state; an unlocking member, when the unlocking member is pushed and moved, the first clamping part and the second clamping part change from an engaged state to a separated state; the two end parts of the thermal printer in the length direction are respectively a connecting end and an opening end, the rotating shaft of the cover assembly rotating relative to the main body is arranged at the connecting end, and the first clamping part, the second clamping part and the unlocking member are arranged at the opening end.

[0006] It can be seen from the above scheme that a first clamping portion is provided on the cover assembly and a corresponding second clamping portion is provided on the main body, and the cover assembly can be opened and closed relative to the main body by pushing the unlocking piece; and the connecting end is provided at one end in the length direction of the printer, and the opening end is provided at the other end, so that when it is necessary to operate manually to open the cover assembly, it can be operated along the width direction of the printer, and the operation span is small; thus, the cover opening structure is simple and easy to operate.

[0007] According to a specific implementation of the utility model, the first elastic reset member acts on the first clamping portion, the first clamping portion is movably arranged, the second clamping portion is fixedly arranged, and the unlocking member is arranged on the cover assembly.

[0008] It can be seen from the above solution that the cover assembly can be opened by pushing the unlocking member to make the first clamping portion overcome the action of the first elastic reset member and move to a state of being separated from the second clamping portion.

[0009] According to a specific embodiment of the utility model, the unlocking member includes a pressing portion that can be pressed; when the pressing portion is pressed, the first clamping portion can overcome the force of the first elastic return member and move, and change from an engaged state to a separated state with the second clamping portion.

[0010] It can be seen from the above solutions that by providing a pressing portion for pressing the unlocking member, the opening operation of the cover assembly can be facilitated.

[0011] According to a specific implementation of the present utility model, the cover assembly includes an upper shell and a bottom plate, the upper shell is provided with a first hole, and the pressing portion is exposed from the first hole.

[0012] As can be seen from the above scheme, the cover assembly includes an upper shell and a bottom plate, and the space between them can be used to set other structures and components used in the printer. The partially open cover structure on the cover assembly can be protected by the upper shell or the bottom plate and is not easily damaged.

[0013] According to a specific implementation of the utility model, the first clamping portion is arranged on the unlocking member, and a guiding structure for guiding the movement of the unlocking member is arranged on the bottom plate, and the guiding structure is arranged on the left and right sides of the unlocking member.

[0014] It can be seen from the above scheme that by directly arranging the first clamping part on the unlocking member, the cover opening structure design is simple, and at the same time, the guiding structure can make the movement of the first clamping part smoother, so that the opening and closing of the cover assembly are more stable.

[0015] According to a specific embodiment of the utility model, the thermal printer also includes a push piece, the first clamping portion is arranged at the lower end of the push piece, one end of the first elastic return member is fixed to the middle part of the push piece, the upper end of the push piece is provided with a guided portion, and a guiding portion is provided in the cover assembly to guide the movement of the guided portion.

[0016] It can be seen from the above scheme that by separately arranging the push member and the unlocking member, that is, the first clamping portion and the pressing portion are separately arranged, the arrangement of the cover opening structure can be more flexible and easier to operate, a guided portion is arranged at the upper end of the push member, a clamping portion is arranged at the lower end, and an elastic reset member is fixed in the middle, so that the push member moves smoothly, thereby the first clamping portion moves smoothly, thereby ensuring the stability of the cover opening structure.

[0017] According to a specific implementation of the utility model, the guiding part is configured as a hollow guiding sleeve, the guided part is configured as a guiding shaft, and the guiding shaft partially penetrates into the guiding sleeve.

[0018] It can be seen from the above scheme that by providing a guide sleeve and a guide shaft extending therein, the push member is moved along the axial direction of the guide sleeve and the guide shaft, so that the first clamping part moves smoothly relative to the second clamping part, thereby improving the stability of the cover opening structure.

[0019] According to a specific embodiment of the utility model, a second elastic recovery member is arranged between the push member and the unlocking member; when the pressing portion is pressed, the second elastic recovery member pushes the push member to overcome the force of the first elastic return member and move, and the first clamping portion and the second clamping portion change from a engaged state to a separated state.

[0020] It can be seen from the above solution that by providing the second elastic restoring member, the force from the unlocking member to the pushing member is transmitted through the second elastic restoring member and is buffered, so that the movement of the pushing member is smoother.

[0021] According to a specific embodiment of the utility model, the first clamping portion is configured as a hook with a guiding slope, and the main body is provided with an opening. When the cover assembly is closed relative to the main body, the guiding slope abuts against the side of the opening, so that the first clamping portion overcomes the force of the first elastic return member and moves. After the hook enters the opening, the first clamping portion and the second clamping portion remain in a coupling state under the action of the first elastic return member.

[0022] It can be seen from the above scheme that when the cover assembly is closed, the guiding inclined surface cooperates with the opening to make the first clamping part automatically move backward without operating the unlocking member. After the hook enters the main body from the opening, under the action of the first elastic member, the first clamping part and the second clamping part remain in an engaged state, thereby realizing the closure of the cover assembly relative to the main body. The structure is simple and the operation is convenient.

[0023] According to a specific implementation of the utility model, at the connecting end, the main body is provided with a receiving cavity, and the cover assembly is provided with a connecting arm extending into the receiving cavity.

[0024] It can be seen from the above solutions that by providing a receiving cavity in the main body and extending the connecting wall into the receiving cavity, the connecting arm can be protected from being damaged by collision.

[0025] In order to more clearly illustrate the above-mentioned objectives, technical solutions and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of embodiment 1 of the utility model;

[0027] Figure 2 It is a side structural schematic diagram of embodiment 1 of the utility model;

[0028] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0029] Figure 4 It is a schematic diagram of the structure of the unlocking member in Embodiment 1 of the utility model;

[0030] Figure 5 This is a schematic structural diagram of the unlocking member in Embodiment 1 of the utility model from another perspective;

[0031] Figure 6 It is a schematic structural diagram of the upper housing in Embodiment 1 of the present utility model;

[0032] Figure 7 It is a structural schematic diagram of the bottom plate in Embodiment 1 of the present utility model;

[0033] Figure 8 yes Figure 7 Middle C is a schematic diagram of a partially enlarged structure;

[0034] Fig. 9 It is a structural schematic diagram of the main body in Embodiment 1 of the present utility model;

[0035] Fig.10 It is a three-dimensional structural schematic diagram of embodiment 2 of the utility model;

[0036] Fig.11 It is a side structural schematic diagram of embodiment 2 of the utility model;

[0037] Fig.12 yes Fig.11 Schematic diagram of the structure of the middle BB section;

[0038] Fig.13 It is a schematic structural diagram of the upper housing in Embodiment 2 of the present utility model;

[0039] Fig.14 This is a schematic diagram of the structure of Example 2 of the utility model after removing the upper shell;

[0040] Fig.15 It is a schematic structural diagram of the push member in Embodiment 2 of the present utility model;

[0041] Fig.16 This is a schematic structural diagram of the push member in Embodiment 2 of the present utility model from another perspective;

[0042] Fig.17 It is a schematic diagram of the structure of the unlocking member in Embodiment 2 of the present utility model;

[0043] Fig.18 It is a structural schematic diagram of the bottom plate in Embodiment 2 of the present utility model;

[0044] Fig.19 It is a structural schematic diagram of the main body in Example 2 of the utility model. DETAILED DESCRIPTION

[0045] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but it is easy for those skilled in the art to understand that the present invention can also be implemented in other ways different from those described herein. Therefore, other possible implementation methods that can be known by those skilled in the art based on the embodiments described in this application all belong to the protection scope of this application.

[0046] The specific structure of the embodiment of the utility model is described in detail below according to the accompanying drawings. It can be understood that the embodiment of the utility model includes but is not limited to the illustrated structure, and those skilled in the art can make corresponding adjustments and improvements to its structure according to actual conditions.

[0047] Example 1

[0048] like Figure 1As shown, the thermal printer 100 is in the shape of a rectangular parallelepiped, and includes a cover assembly 110 and a main body 120, wherein the cover assembly 110 can be opened and closed relative to the main body 120, and when the cover assembly 110 is in the closed position, there is a paper outlet 130 between the cover assembly 110 and the main body 120, and the printed thermal paper and other printing media are discharged from the paper outlet 130, and a cutter for cutting the printing medium is generally provided on the cover assembly 110.

[0049] like Figure 2 and Figure 3 As shown, at one end of the thermal printer 100 in the length direction, the cover assembly 110 is provided with an unlocking member 141 and a first elastic recovery member 142, which are used to open or close the cover assembly 110 relative to the main body 120, that is, this end is the opening end of the thermal printer; at the other end of the thermal printer in the length direction, the cover assembly 110 is provided with a connecting arm 1123, and the main body 120 is provided with a pin shaft 1213, so that the cover assembly 110 can be rotatably set on the main body 120, that is, this end is the connecting end of the thermal printer.

[0050] Furthermore, at the cover opening end, the cover assembly 110 is provided with a hook 1412 as a first clamping portion (see Figure 4 ), a second clamping portion 1211 is provided on the main body. When the hook 1412 is engaged with the second clamping portion 1211, the thermal printer 100 is in a closed state. When the hook 1412 is separated from the second clamping portion 1211, the cover assembly 110 can be opened relative to the main body 120. At the connecting end, the main body 120 is provided with a receiving cavity 1214, and a pin shaft 1213 serving as a rotation axis of the connecting arm 1123 is provided in the receiving cavity 1214, so that the connecting arm 1123 is located in the receiving cavity 1214. A baffle 1121 abutting against the first elastic return member 142 is provided on the cover assembly 110.

[0051] like Figure 4 and Figure 5 As shown, the unlocking member 141 includes a pressing portion 1411 and a hook 1412 as a first clamping portion, wherein the pressing portion 1411 is exposed from the cover assembly 110 to facilitate the pressing operation, and a fixing column 1415 for fixing one end of the first elastic return member 142 is provided at the end of the unlocking member 141 opposite to the pressing portion 1411, and sliding guide surfaces 1414 are provided on the left and right sides of the unlocking member, and the hook 1412 is arranged at the lower position and has a guiding slope 1413.

[0052] like Figure 6 and Figure 7As shown, the cover assembly 110 includes an upper shell 111 and a bottom plate 112, wherein the upper shell 111 is provided with a through hole 1111 as a first hole to expose the pressing portion 1411, and the bottom plate 112 is provided with a connecting arm 1123 and a hole 1122 for connecting with the pin shaft 1213.

[0053] like Figure 8 As shown, the bottom plate 112 is provided with a baffle 1121, a support portion 1125 for supporting the unlocking member 141, a guide structure 1126 for guiding the unlocking member 141 to move, and an opening 1127 for the hook 1412 to pass through. Fig. 9 As shown, the main body 120 is provided with an opening 1216 , and an abutting wall 1212 is provided at the opening 1216 to prevent the hook 1412 from further moving.

[0054] When opening the cover of the thermal printer, the pressing portion 1411 can be pressed, and the unlocking member 141 overcomes the force of the first elastic recovery member 142 and moves, and the sliding guide surface 1414 is guided by the guide structure 1126 to make the unlocking member 141 move smoothly, driving the hook 1412 to move from the engaged state with the second clamping portion 1121 to the separated state. After the hook 1412 is completely separated from the second clamping portion 1121, the cover assembly 110 can be rotated relative to the main body, and the hook 1412 withdraws from the opening 1216. At this time, the pressure on the pressing portion 1411 can be released, and the unlocking member 141 can move to the initial position under the action of the first elastic recovery member, and the cover assembly 110 can be rotated relative to the main body 120 to the desired opening angle.

[0055] When closing the cover assembly 110, the cover assembly 110 is rotated relative to the main body 120 along the pin shaft 1213 until the guiding slope 1413 of the hook 1412 abuts against the side of the opening 1216. As the cover assembly 110 further rotates in the direction of closing the cover assembly 110, the guiding slope 1413 slides along the side and overcomes the force of the first elastic recovery member 142 until it loses contact with the side. Then, under the action of the first elastic recovery member 142, the unlocking member 141 moves to the hook 1412 to engage with the second clamping portion 1211 arranged below the opening 1216, so that the cover assembly 110 is closed relative to the main body 120.

[0056] It is understandable that, in other embodiments, an unlocking member and a first elastic restoring member may also be provided on the main body, so that the second clamping portion extends upward and can move relatively.

[0057] Example 2

[0058] like Fig.10As shown, the thermal printer 200 is in the shape of a rectangular parallelepiped, including a cover assembly 210 and a main body 220, wherein the cover assembly 210 can be opened and closed relative to the main body 220, and when the cover assembly 210 is in the closed position, there is a paper outlet 230 between the cover assembly 210 and the main body 220, and the printed thermal paper and other printing media are discharged from the paper outlet 230, and the cutter for cutting the printing medium is generally set on the cover assembly 110.

[0059] like Fig.11 and Fig.12 As shown, at one end of the thermal printer 200 in the length direction, the cover assembly 210 is provided with an unlocking member 241, a second elastic recovery member 242, a push member 243 and a first elastic recovery member 244, which are used to open or close the cover assembly 210 relative to the main body 220, that is, this end is the opening end of the thermal printer 200; at the other end of the thermal printer in the length direction, the cover assembly 210 is provided with a connecting arm 2123, and the main body 220 is provided with a pin shaft 2213, so that the cover assembly 210 can be rotatably set on the main body 220, that is, this end is the connecting end of the thermal printer.

[0060] Furthermore, at the cover opening end, the push member 243 is provided with a hook 2432 as a first clamping portion (see Fig.15 ), the main body 220 is provided with a second clamping portion 2211. When the hook 2432 is in an engaged state with the second clamping portion 2211, the thermal printer 200 is in a closed state. When the hook 2432 is in a separated state with the second clamping portion 2211, the cover assembly 210 can be opened relative to the main body 220. At the connecting end, the main body 220 is provided with a receiving cavity 2214. The pin shaft 2213 as the rotation axis of the connecting arm 2123 is arranged in the receiving cavity 2214, so that the connecting arm 12123 is located in the receiving cavity 2214. The baffle 2121 abutting against the first elastic reset member 142 is arranged on the cover assembly 110.

[0061] like Fig.13 and Fig.18 As shown, the cover assembly 210 includes an upper shell 211 and a bottom plate 212, wherein the upper shell 211 is provided with a through hole 2111 as a first hole to expose the unlocking member 241, and the bottom plate 212 is provided with a baffle 2121, a support portion 2124 for supporting the unlocking member 241, a rib 1126 for blocking the movement of the unlocking member 241, and an opening 2125 for the hook 2432 to pass through. At the other end, the bottom plate 212 is also provided with a connecting arm 2123 and a hole 2122 for connecting with the pin 2213.

[0062] like Fig.14As shown, after removing the upper shell 211, along the direction from the opening end to the connection end of the thermal printer, the various parts of the opening cover structure are arranged as an unlocking member 241, a second elastic recovery member 242, a push member 243, a first elastic recovery member 244 and a guide sleeve 245, wherein the guide sleeve 245 is hollow and fixed on the bottom plate 212, the second elastic recovery member 242 is clamped between the unlocking member and the push member, one end of the first elastic recovery member 2422 abuts against the push member 243, and the other end abuts against the baffle 2121 on the bottom plate 212.

[0063] like Fig.15 and Fig.16 As shown, the push member 243 includes a hook 2432 at the lower end and a guide shaft 2436 at the upper end. A fixing portion 2433 is provided on the side of the push member 243 facing the unlocking member 241 for mounting and positioning with one end of the second elastic restoring member 242, and a fixing portion 2435 is provided on the other side for mounting and positioning with one end of the first elastic restoring member 244. The hook 2432 has a guiding inclined surface 2411, and the guide shaft 2436 can be mounted on the hole 2434 by threading, or can be fastened in the hole 2434 by interference fit. Preferably, the inner diameter of the guide sleeve 245 is 0.05 to 0.1 mm larger than the outer diameter of the guide shaft 2436, and the portion of the guide shaft 2436 located outside the guide sleeve 245 is larger than the stroke of the push member 243 during the cover opening operation.

[0064] like Fig.17 As shown, the unlocking member 241 includes a pressing portion 2411, wherein the pressing portion 2411 is exposed from the cover assembly 210 to facilitate the pressing operation, and a fixing column 2412 for fixing one end of the second elastic return member 242 is provided at one end of the unlocking member 241 opposite to the pressing portion 2411, and protrusions 2413 are provided on the left and right sides of the unlocking member to abut against the ribs 2126 on the bottom plate 212. Fig.19 As shown, the main body 220 is provided with an opening 2216 , and an abutment wall is provided at the opening 2216 to prevent the hook 2432 from further moving.

[0065] When opening the cover of the thermal printer, the pressing portion 2411 can be pressed, and the unlocking member 241 pushes the pushing member 243 through the second elastic recovery member 242 to overcome the force of the first elastic recovery member 244 and move, and the guide shaft 2436 further moves into the guide sleeve 245, so that the pushing member 243 moves along the axis, driving the hook 2432 to move from the engaged state with the second clamping portion 2121 to the separated state. After the hook 2432 is completely separated from the second clamping portion 2121, the cover assembly 210 can be rotated relative to the main body 220, and the hook 2432 withdraws from the opening 2216. At this time, the pressure on the pressing portion 2411 can be released, and the pushing member 243 and the unlocking member 241 can move to the initial position under the action of the first elastic recovery member 244 and the second elastic recovery member 242, and the cover assembly 210 can be rotated relative to the main body 220 to the required opening angle.

[0066] When closing the cover assembly 210, the cover assembly 210 is rotated along the pin shaft 2213 relative to the main body 220 until the guiding slope 2431 of the hook 2432 abuts against the side of the opening 2216. As the cover assembly 210 further rotates in the direction of closing the cover assembly 210, the guiding slope 2431 slides along the side and overcomes the force of the first elastic recovery member 244 until it is out of contact with the side. Then, under the action of the first elastic recovery member 244, the unlocking member 243 moves to the hook 2432 to engage with the second clamping portion 2211 arranged below the opening 2216, so that the cover assembly 210 is closed relative to the main body 220.

[0067] It is understandable that in other embodiments, the unlocking member, the abutting member and the first elastic restoring member may also be provided on the main body, so that the second clamping portion extends upward and can move relatively. In addition, in addition to the matching of the sleeve and the shaft, the guiding structure may also be provided in other ways.

[0068] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art can make some improvements without departing from the scope of the present invention, that is, any changes or improvements made according to the present invention should be covered by the protection scope of the present invention.

Claims

1. A thermal printer, comprising a main body and a cover assembly rotatably disposed on the main body; characterized in that: The cover assembly is provided with a first clamping portion, the main body is provided with a second clamping portion, and the first clamping portion can move relative to the second clamping portion; a first elastic return member, configured to act on the first clamping portion or the second clamping portion to keep the first clamping portion and the second clamping portion in an engaged state; an unlocking member, wherein when the unlocking member is pushed and moved, the first clamping portion and the second clamping portion change from an engaged state to a separated state; The two ends of the thermal printer in the length direction are respectively a connecting end and an opening end, the rotation axis of the cover assembly rotating relative to the main body is arranged at the connecting end, and the first clamping part, the second clamping part and the unlocking member are arranged at the opening end.

2. The thermal printer according to claim 1, characterized in that: The first elastic return member acts on the first clamping portion, the first clamping portion is movably arranged, the second clamping portion is fixedly arranged, and the unlocking member is arranged on the cover assembly.

3. The thermal printer according to claim 2, characterized in that: The unlocking member includes a pressing portion that can be pressed; when the pressing portion is pressed, the first clamping portion can overcome the action force of the first elastic reset member and move, and change from an engaged state to a separated state with the second clamping portion.

4. The thermal printer according to claim 3, characterized in that: The cover assembly includes an upper shell and a bottom plate. The upper shell is provided with a first hole, and the pressing portion is exposed from the first hole.

5. The thermal printer according to claim 4, characterized in that: The first clamping portion is arranged on the unlocking member, and a guiding structure for guiding the movement of the unlocking member is arranged on the bottom plate, and the guiding structure is arranged on the left and right sides of the unlocking member.

6. The thermal printer according to claim 4, characterized in that: The push member, the first clamping portion is arranged at the lower end of the push member, one end of the first elastic return member is fixed to the middle part of the push member, the upper end of the push member is provided with a guided portion, and the cover assembly is provided with a guiding portion to guide the movement of the guided portion.

7. The thermal printer according to claim 6, characterized in that: The guiding part is configured as a hollow guiding sleeve, the guided part is configured as a guiding shaft, and the guiding shaft partially penetrates into the guiding sleeve.

8. The thermal printer according to claim 7, characterized in that: A second elastic recovery member is arranged between the push member and the unlocking member; when the pressing portion is pressed, the second elastic recovery member pushes the push member to overcome the force of the first elastic return member and move, and the first clamping portion and the second clamping portion change from an engaged state to a separated state.

9. The thermal printer according to any one of claims 2 to 8, characterized in that: The first clamping portion is configured as a clamping hook with a guiding slope, and the main body is provided with an opening. When the cover assembly is closed relative to the main body, the guiding slope abuts against the side of the opening, so that the first clamping portion overcomes the force of the first elastic return member and moves. After the clamping hook enters the opening, the first clamping portion and the second clamping portion remain in an engaged state under the action of the first elastic return member.

10. The thermal printer according to any one of claims 1 to 8, characterized in that: At the connecting end, the main body is provided with a receiving cavity, and the cover assembly is provided with a connecting arm extending into the receiving cavity.

Images