Mounting structure of thermal printing head assembly and thermal printer with mounting structure

Abstract

A mounting structure of a thermal printing head assembly comprises an upper cover assembly and the thermal printing head assembly arranged on the inner side of the upper cover assembly, and is characterized in that at least one end of the thermal printing head assembly is restrained at a preset position on the inner side of the upper cover assembly through an elastic clamping hook; an elastic piece is arranged between the back face of the thermal printing head assembly and the inner wall of the upper cover assembly, and the load applying direction of the elastic piece to the thermal printing head assembly is opposite to the restraining force direction of the elastic clamping hook to the thermal printing head assembly. The utility model also discloses a thermal printer. The thermal printing head assembly is arranged through the elastic clamping hook and the elastic piece, the thermal printing head assembly can be disassembled conveniently and rapidly only by pressing the elastic clamping hook easily during disassembly, the thermal printing head assembly is not prone to displacement after being positioned, the printing quality is ensured, the elastic clamping hook is loosened during installation, the elastic clamping hook is deformed and restored, and the thermal printing head assembly can be disassembled conveniently and rapidly. And the positioning is completed.

Description

Technical Field

[0001] This utility model relates to an installation structure for a thermal printhead assembly and a thermal printer having the installation structure. Background Technology

[0002] In a thermal printer, the TPH assembly specifically refers to the thermal printhead assembly. The thermal printhead assembly generally consists of a thermal printhead glued to a support frame. The thermal printhead is a key component of thermal printing technology. It mainly consists of a row of heating elements with identical resistance, arranged closely together. When a certain current passes through these elements, high temperatures are quickly generated, causing the dielectric coating to heat up and undergo a chemical reaction within a very short time, thus revealing color.

[0003] The existing TPH component installation structure uses a plug-in design, which requires significant force during maintenance and disassembly, and the locking position is difficult to guarantee, potentially affecting print quality. Relevant patent documents can be found in Chinese Utility Model Patent No. ZL201820277800.1, "Thermal Printer Mechanism" (Authorization Announcement No. CN208646330U); and Chinese Utility Model Patent No. ZL202021715785.8, "Thermal Printer Cover Opening Structure and Thermal Printer Mechanism with Such Opening Structure" (Authorization Announcement No. CN214056983U). Therefore, improvements are needed. Utility Model Content

[0004] The first technical problem this invention aims to solve is to provide an installation structure for a thermal printhead assembly that is easy to disassemble and install, in light of the aforementioned technical situation.

[0005] The second technical problem to be solved by this utility model is to provide a thermal printer with a convenient thermal printhead assembly that is easy to disassemble and install, in view of the above-mentioned technical status.

[0006] The technical solution adopted by this utility model to solve the first technical problem mentioned above is as follows: an installation structure for a thermal printhead assembly, including a top cover assembly and a thermal printhead assembly disposed inside the top cover assembly, characterized in that at least one end of the thermal printhead assembly is constrained to a preset position inside the top cover assembly by an elastic hook; an elastic element is provided between the back of the thermal printhead assembly and the inner wall of the top cover assembly, the direction of the load applied by the elastic element to the thermal printhead assembly is opposite to the direction of the constraint force of the elastic hook on the thermal printhead assembly, and the aforementioned elastic hook can be squeezed to detach from the top cover assembly, thereby causing the thermal printhead assembly to detach from the top cover assembly under the action of the elastic element.

[0007] Preferably, the elastic elements are multiple and arranged symmetrically.

[0008] Preferably, the elastic element is a tower-shaped spring, and the inner wall of the upper cover assembly has a limiting groove. The small end of the tower-shaped spring is adapted to the limiting groove, while the large end abuts against the back of the thermal printhead assembly.

[0009] Furthermore, both ends of the thermal printhead assembly are constrained to preset positions inside the upper cover assembly by elastic hooks.

[0010] The removable design of the elastic hook is preferably as follows: the inner side of the upper cover assembly has a snap-fit ​​hole, the front end of the elastic hook is bent to form a non-detachment part, and the end of the elastic hook extends into the snap-fit ​​hole and abuts against the inner side wall end face of the snap-fit ​​hole with the non-detachment part to restrict the elastic hook from detaching from the snap-fit ​​hole.

[0011] Preferably, the anti-detachment part is laterally bent to form a hook-shaped protrusion. The anti-detachment part of the elastic hook consists of two parts, located on the upper and lower sides of the elastic hook respectively. The bending directions of the two anti-detachment parts are opposite and they are outwardly flared. When the front end of the elastic hook is inserted into the locking hole, the elastic hook can allow the anti-detachment part to pass through the locking hole through elastic deformation, and after being fully inserted, it returns to its original shape to complete the limiting.

[0012] To facilitate the installation of the flexible latch: the front end face of the thermal printhead assembly has a positioning groove for the flexible latch to fit.

[0013] The technical solution adopted by this utility model to solve the second technical problem mentioned above is as follows: a thermal printer, characterized in that it includes an upper cover assembly, a thermal printhead assembly disposed inside the upper cover assembly, a lower base, and a rubber roller disposed on the lower base. The aforementioned upper cover assembly is disposed on the lower base in an openable and closable manner. The axial direction of the rubber roller is parallel to the length direction of the thermal printhead assembly. When the upper cover assembly is closed in the aforementioned lower base, the aforementioned rubber roller is pressed and engaged with the thermal printhead assembly, and the printing paper is pulled and clamped through the gap between the rubber roller and the thermal printhead assembly.

[0014] Compared with existing technologies, the advantages of this invention are as follows: It uses elastic hooks and elastic components to set the thermal printhead assembly. Disassembly is quick and easy; simply press the elastic hook to remove the thermal printhead assembly. Furthermore, once positioned, the thermal printhead assembly is less prone to displacement, ensuring print quality. During installation, releasing the elastic hook allows it to deform and return to its original position, thus repositioning the printhead. Additionally, the overall installation structure occupies little space, facilitating the installation of other components. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure after the upper cover assembly and the lower base are closed in the embodiment.

[0016] Figure 2 This is a schematic diagram of the structure after the upper cover assembly and the lower base are flipped open in the embodiment.

[0017] Figure 3 This is an exploded view of the top cover assembly and thermal printhead in the embodiment.

[0018] Figure 4 This is an enlarged three-dimensional sectional view of the top cover assembly and the thermal printhead in the embodiment.

[0019] Figure 5 This is an enlarged 3D view of the elastic hook.

[0020] Figure 6 This is a schematic diagram of the printed paper roll after installation, as shown in the example. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 and Figure 2 The thermal printer in this embodiment includes an upper cover assembly 1, a thermal printhead assembly 3 disposed inside the upper cover assembly 1, a lower base 2, and a rubber roller 4 disposed on the lower base 2. The upper cover assembly 1 is closable and disposed on the lower base 2. The axial direction of the rubber roller 4 is parallel to the length direction of the thermal printhead assembly 3. When the upper cover assembly 1 is closed in the lower base 2, a paper outlet 1a is formed between the two, and the rubber roller 4 is pressed into contact with the thermal printhead assembly 3. The lower base 2 has a paper roll compartment 21 for storing paper rolls. Figure 6 As shown, the printing paper 10 is pulled and clamped through the gap between the rubber roller 4 and the thermal printhead assembly 3.

[0023] like Figure 3 and Figure 4 As shown, both ends of the thermal printhead assembly 3 in this embodiment are constrained to a preset position inside the upper cover assembly 1 by elastic hooks 5; the front end face of the thermal printhead assembly 3 has a positioning groove 31 for the elastic hooks 5 to fit.

[0024] An elastic element 6 is provided between the back of the thermal printhead assembly 3 and the inner wall of the upper cover assembly 1. The direction of the load applied by the elastic element 6 to the thermal printhead assembly 3 is opposite to the direction of the constraint force of the elastic hook 5 on the thermal printhead assembly 3. After the elastic hook 5 is squeezed, it can be released from the upper cover assembly 1, thereby causing the thermal printhead assembly 3 to be released from the upper cover assembly 1 under the action of the elastic element 6.

[0025] Specifically, there are multiple elastic elements 6 arranged symmetrically from left to right. The elastic elements 6 are tower-shaped springs. The inner wall of the upper cover assembly 1 has a limiting groove 11. The small end of the tower-shaped spring is fitted into the limiting groove 11, while the large end abuts against the back of the thermal printhead assembly 3.

[0026] The inner side of the top cover assembly 1 has a snap-fit ​​hole 12, and the front end of the elastic hook 5 is bent to form a non-detachment part 51 for easy snap-fit ​​positioning. After the end of the elastic hook 5 extends into the snap-fit ​​hole 12, it abuts against the inner wall end face of the snap-fit ​​hole 12 with the non-detachment part 51, thereby preventing the elastic hook 5 from disengaging from the snap-fit ​​hole 12. Figure 5 As shown, the anti-disengagement part 51 is laterally bent to form a hook-shaped protrusion. The anti-disengagement part 51 of the elastic hook 5 consists of two parts, located on the upper and lower sides of the elastic hook 5 respectively. The bending directions of the two anti-disengagement parts 51 are opposite and they open outward. When the front end of the elastic hook 5 is inserted into the locking hole 12, the elastic hook 5 can allow the anti-disengagement part 51 to pass through the locking hole 12 through elastic deformation, and after being fully inserted, it returns to its original shape to complete the limiting.

[0027] During disassembly, simply press the two sides of the elastic hook with your fingers to deform it. The radial distance between the two anti-detachment parts shortens, allowing the anti-detachment parts to easily disengage from the locking hole, thus completing the disassembly of the thermal printhead assembly. This is convenient and quick, and once positioned, the thermal printhead assembly is less likely to shift, ensuring print quality. During installation, releasing the elastic hook allows it to deform and return to its original position, repositioning the thermal printhead assembly. Furthermore, the overall installation structure occupies little space, facilitating the installation of other components.

Claims

1. A mounting structure of a thermal printhead assembly, comprising an upper cover assembly and a thermal printhead assembly provided inside the upper cover assembly, characterized in that At least one end of the thermal printhead assembly is constrained to a preset position inside the upper cover assembly by an elastic hook; an elastic element is provided between the back of the thermal printhead assembly and the inner wall of the upper cover assembly, and the direction of the load applied by the elastic element to the thermal printhead assembly is opposite to the direction of the constraint force of the elastic hook on the thermal printhead assembly. After the aforementioned elastic hook is squeezed, it can be released from the upper cover assembly, thereby causing the thermal printhead assembly to be released from the upper cover assembly under the action of the elastic element.

2. The mounting structure of a thermal printhead assembly according to claim 1, characterized by The elastic elements are multiple and arranged symmetrically.

3. The mounting structure of a thermal printhead assembly according to claim 2, characterized by The elastic element is a tower-shaped spring, and the inner wall of the upper cover assembly has a limiting groove. The small end of the tower-shaped spring is adapted to the limiting groove, while the large end abuts against the back of the thermal printhead assembly.

4. The mounting structure of a thermal printhead assembly according to claim 1, characterized by Both ends of the thermal printhead assembly are constrained to preset positions inside the upper cover assembly by elastic hooks.

5. The mounting structure of a thermal printhead assembly according to claim 1 or 4, characterized by The inner side of the upper cover assembly has a snap-fit ​​hole, and the front end of the elastic hook is bent to form a non-detachment part. After the end of the elastic hook extends into the snap-fit ​​hole, the non-detachment part abuts against the end face of the inner side wall of the snap-fit ​​hole to restrict the elastic hook from detaching from the snap-fit ​​hole.

6. The mounting structure of a thermal printhead assembly according to claim 5, wherein The anti-detachment part is laterally bent to form a hook-shaped protrusion.

7. The mounting structure of a thermal printhead assembly according to claim 6, wherein The elastic hook has two anti-disengagement parts located on the upper and lower sides of the elastic hook. The two anti-disengagement parts bend in opposite directions and open outwards. When the front end of the elastic hook is inserted into the locking hole, the elastic hook can allow the anti-disengagement part to pass through the locking hole through elastic deformation, and restores its deformation after full insertion to complete the limiting.

8. The mounting structure of a thermal printhead assembly according to claim 1, wherein The front end face of the thermal printhead assembly has a positioning groove for the flexible hook to fit.

9. A thermal printer having the mounting structure of the thermal printhead assembly according to any one of claims 1 to 8, characterized by The device includes an upper cover assembly, a thermal printhead assembly disposed inside the upper cover assembly, a lower base, and a rubber roller disposed on the lower base. The upper cover assembly is closable and disposed on the lower base. The axial direction of the rubber roller is parallel to the length direction of the thermal printhead assembly. When the upper cover assembly is closed in the lower base, the rubber roller is pressed and engaged with the thermal printhead assembly, and the printing paper is pulled and clamped through the gap between the rubber roller and the thermal printhead assembly.

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