A two-inch thermal printer embedded core

Abstract

The utility model relates to thermal printer technical field discloses a two inch thermal printer embedded type movement mainly used for cash register thermal printing, including two inch rubber roller, movement main part and gear drive module. Two inch rubber roller both ends are equipped with rubber roller shaft sleeve and rubber roller gear respectively, movement main part is used for fixing TPH and motor, gear drive module contains motor, transmission gear, ladder gear A, ladder gear B, motor output shaft connects transmission gear, and the meshing drive of ladder gear A, ladder gear B reaches rubber roller gear, drives two inch rubber roller rotation to realize auxiliary printing. The self -designed ladder gear promotes the strength and the meshing stability, solves the problem that the traditional gear is easy to wear, and the transmission gap becomes big, and the gear drive module is protected by the gear drive room surrounded by the protective cover plate and the mounting frame, and the impurities are isolated, and the long -term operation reliability is improved.

Description

Technical Field

[0001] This utility model belongs to the field of thermal printing technology, specifically relating to an embedded mechanism for a two-inch thermal printer. Background Technology

[0002] With the rapid development of new retail and unmanned checkout models, thermal printers for cash registers, as the core equipment for outputting transaction receipts, have made the stability and durability of their embedded mechanisms crucial performance indicators. Two-inch thermal printers, due to their compatibility with common transaction document sizes, are widely used in convenience stores, restaurants, and other similar settings. Their embedded mechanisms need to achieve efficient power transmission, stable paper feeding, and reliable thermal imaging within a limited space to meet the demands of high-frequency, continuous printing. Currently, most two-inch thermal printers on the market use traditional gear transmission structures for their embedded mechanisms, but these often suffer from insufficient gear strength and poor transmission stability, affecting print quality and equipment lifespan over long-term use.

[0003] Existing thermal printer transmission modules typically consist of a motor, ordinary gears, and rubber roller gears. The motor output shaft connects directly or via a single-stage gear and transmission gear to the rubber roller gears, ultimately driving the rubber roller to rotate. On one hand, traditional gears lack sufficient strength, and long-term meshing transmission can easily lead to problems such as tooth surface wear and tooth root breakage. Especially in continuous printing scenarios, gear deformation may cause increased transmission clearance, resulting in rubber roller jamming or uneven speed, causing skewed or blurry printed content. On the other hand, the transmission system lacks an integrated protective structure, allowing external dust and paper scraps to easily enter the gear meshing area, accelerating wear and interfering with transmission accuracy. At the same time, the gear installation stability is insufficient, and vibration can easily cause meshing misalignment, further reducing the long-term operational reliability of the equipment.

[0004] In view of this, we propose an embedded mechanism for a two-inch thermal printer to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the technical problems of insufficient strength and easy wear of gears in the transmission module of thermal printers, which lead to increased transmission clearance and resulting in jamming or uneven speed of the rubber roller.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An embedded mechanism for a 2-inch thermal printer, primarily used for thermal printing in cash registers, includes:

[0008] Two-inch rubber rollers, with rubber roller bushings and rubber roller gears fixedly sleeved at both ends;

[0009] The main body of the mechanism is used to fix the TPH and the motor;

[0010] The gear transmission module uses a motor to provide power and drives the two-inch rubber roller to rotate through gear transmission to achieve auxiliary printing function. The gear transmission module also includes a transmission gear, a stepped gear A, and a stepped gear B.

[0011] The output shaft of the motor is fixedly connected to the transmission gear in the gear transmission chamber. The transmission gear meshes with the large gear on the stepped gear A. The small gear on the stepped gear A meshes with the large gear on the stepped gear B. The small gear on the stepped gear B meshes with the rubber roller gear.

[0012] The core advantage of this 2-inch thermal printer's embedded mechanism lies in the optimized design of its gear transmission system. The self-designed gear and stepped gear structure improves gear strength and meshing stability, solving the problems of easy wear and increased transmission clearance in traditional gears, reducing roller jamming or uneven speed, and ensuring neat and clear printed content.

[0013] Meanwhile, the gear transmission module is enclosed and protected by the gear transmission chamber formed by the protective cover and the mounting frame, which effectively isolates external dust, paper scraps and other impurities, preventing them from entering the gear meshing area and aggravating wear. Compared with the open transmission structure that lacks protection in the existing technology, this significantly improves the long-term operational reliability of the transmission system.

[0014] In addition, the multi-stage stepped gear meshing design enables efficient power transmission. Combined with the limiting and fixing of components such as the rubber roller bushing and rubber roller bracket, the rotation of the rubber roller is more stable. This solves the meshing misalignment problem caused by insufficient gear installation stability in the existing technology, and further improves the durability and consistency of the machine mechanism in high-frequency printing scenarios.

[0015] Preferably, the rubber roller bushing and the rubber roller gear are used to assist the rotation of the two-inch rubber roller, and are respectively rotatably located in the rotation slots on the left and right sides of the machine body. This provides stable rotational support for the two-inch rubber roller and ensures its smooth rotation.

[0016] Preferably, a protective cover is fastened to the right side of the main body of the movement. The protective cover and the mounting frame on the right side of the main body of the movement form a gear transmission chamber. The rubber roller gear is located in the gear transmission chamber and passes through the rear opening of the gear transmission chamber. This creates a space to protect the gear transmission components and reduce external interference.

[0017] Preferably, the left side of the protective cover is provided with fasteners A around its perimeter. Fasteners A engage with fastener slots A on the right side mounting frame of the movement body to securely connect the protective cover to the movement body, facilitating assembly and disassembly.

[0018] Preferably, mounting rod A and mounting rod B are fixedly mounted on the right side of the main body of the movement, located within the gear transmission chamber. Mounting rod A is positioned in front of mounting rod B. The stepped gear A is rotatably sleeved on the outer side of mounting rod A via a bearing, and the stepped gear B is rotatably sleeved on the outer side of mounting rod B via a bearing. This provides a stable mounting and flexible rotation basis for the stepped gears, ensuring precise transmission.

[0019] Preferably, the motor is fixed to the upper front side of the main body of the mechanism. This optimized motor placement facilitates efficient power transmission to the gear drive module.

[0020] Preferably, a cover-opening rocker is rotatably connected to the left side wall of the main body of the mechanism. This rocker engages with a metal switch plate inside the main body of the mechanism, providing on / off control of the mechanism and the 2-inch rubber roller. The bottom of the metal switch plate is connected to a thermal substrate via a spring. This thermal substrate is used to attach to the TPH (Total Hydraulic Part) and is positioned above the 2-inch rubber roller. This design enables convenient on / off control of the mechanism and the rubber roller while ensuring proper coordination between the TPH and the roller.

[0021] Preferably, a switch plate shaft is provided through the thermal substrate, with both ends of the switch plate shaft passing through the left and right ends of the metal switch plate. A torsion spring is sleeved on the switch plate shaft, which is limited in a limiting groove on the metal switch plate. This enhances the stability and reset capability of the connection between the metal switch plate and the thermal substrate.

[0022] Preferably, the lower inner side of the main body of the mechanism is provided with a rubber roller bracket for fixing the two-inch rubber roller. The left and right sides of the rubber roller bracket are respectively provided with grooves supporting the rubber roller bushing and the rubber roller gear. The rear side of the rubber roller bracket is provided with several mounting holes. The hardware switch plate is provided with limiting openings on both sides, limiting the outer sides of the rubber roller bushing and the rubber roller gear. The hardware switch plate and the limiting openings are located between the rubber roller bracket and the main body of the mechanism. This multi-directional fixing and limiting of the two-inch rubber roller components ensures stable rotation without deviation.

[0023] Preferably, the inner side of the main body of the printing press has an inclined panel located in front of the 2-inch rubber roller. Two paper detectors, aligned with the 2-inch rubber roller, are fixed to the inclined panel with screws. This accurately detects the paper condition and ensures accurate paper supply during printing.

[0024] Compared with the prior art, the technical effects and advantages of this utility model are:

[0025] This invention significantly improves the stability of power transmission and the strength of gears through a self-designed gear and stepped gear transmission structure. The meshing design of the multi-stage stepped gears can rationally distribute power, reduce the load pressure on a single gear, and avoid problems such as wear and breakage caused by long-term use of traditional gears. It effectively solves the defects of gear transmission in the prior art, such as easy jamming and increased backlash, ensuring uniform rotation of the two-inch rubber roller and guaranteeing the regularity of the printed content.

[0026] The protective design of the gear transmission chamber in this utility model provides reliable protection for the transmission system. The protective cover and the mounting frame are tightly fastened together by fasteners and slots, forming a semi-enclosed space. This effectively isolates external dust, paper scraps, and other impurities, preventing them from entering the gear meshing area and aggravating wear. Compared with the open transmission structure in the prior art, this significantly improves the long-term operational reliability of the transmission system and reduces printing failures caused by impurities.

[0027] The limiting and fixing design of the overall structure of this utility model enhances the stability of the printing mechanism. The rubber roller engages with the rotating slot of the main body of the printing mechanism through a bushing, gear, and is supported and limited by a rubber roller bracket to ensure no deviation during rotation; the limiting opening slot of the hardware switch plate further constrains the rubber roller component, preventing loosening due to vibration. This multi-limiting structure solves the problems of insufficient gear installation stability and easy meshing misalignment in the prior art, improving the durability of the equipment in high-frequency printing scenarios.

[0028] This invention features a thermal substrate and a metal switch plate that are elastically connected via springs. This ensures precise contact between the TPH (Thermal Printing Head) and the rubber roller, guaranteeing clear thermal imaging, while also facilitating component adjustment during maintenance. The paper detector monitors the paper position in real time, and, in conjunction with the stable rotation of the rubber roller, ensures accurate paper feeding. Compared to the simple fixed structures in existing technologies, this invention offers significant improvements in print quality and ease of maintenance. Attached Figure Description

[0029] Figure 1 This is a first-view diagram of the present invention;

[0030] Figure 2 This is a second-view diagram of the present invention;

[0031] Figure 3 This is a second-view view of the gear transmission module of this utility model;

[0032] Figure 4 This is a schematic diagram of the main body of the movement of this utility model;

[0033] Figure 5 This is a schematic diagram of the structure of the protective cover plate of this utility model;

[0034] Figure 6 This is a schematic diagram of the structure of the hardware switch board and the thermal sheet substrate of this utility model;

[0035] Figure 7 This is a schematic diagram of the structure of the rubber roller bracket of this utility model.

[0036] In the picture:

[0037] 1. Two-inch rubber roller; 11. Rubber roller bushing; 12. Rubber roller gear;

[0038] 2. Main body of the mechanism; 21. Rotating slot; 22. Protective cover plate; 23. Mounting frame; 24. Gear transmission chamber; 25. Buckle A; 26. Buckle slot A; 27. Mounting rod A; 28. Mounting rod B; 29. ​​Stepped gear A; 210. Stepped gear B; 211. Transmission gear; 213. Inclined panel; 214. Screw; 215. Paper detector; 216. Mounting post with hole; 217. Motor;

[0039] 3. Hardware switch board; 301. Limiting groove; 302. Limiting opening groove; 4. Opening rocker arm; 5. Spring; 6. Thermistor substrate; 7. Switch board shaft; 701. Torsion spring; 8. Rubber roller bracket; 801. Support groove; 802. Mounting hole. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] The following combination Figures 1 to 7 This application will be described in further detail;

[0042] This application discloses an embedded mechanism for a 2-inch thermal printer. This embedded mechanism is primarily used for thermal printing in cash registers. It utilizes self-designed gears, resulting in improved strength and stability, as detailed below:

[0043] An embedded mechanism for a 2-inch thermal printer includes:

[0044] Two-inch rubber roller 1 is used to assist printing. Rubber roller bushing 11 and rubber roller gear 12 are fixedly sleeved at both ends of the two-inch rubber roller 1, respectively. The rubber roller bushing 11 and rubber roller gear 12 are used to assist the rotation of the two-inch rubber roller 1. The rubber roller bushing 11 and rubber roller gear 12 are respectively rotatably arranged in the rotation slots 21 on the left and right sides of the main body 2 of the machine.

[0045] The main body 2 is used to fix the TPH and the motor 217. A protective cover plate 22 is fastened to the right side of the main body 2. The protective cover plate 22 and the right side mounting frame 23 of the main body 2 form a gear transmission chamber 24. The rubber roller gear 12 is located in the gear transmission chamber 24 and passes through the rear opening of the gear transmission chamber 24. The left side of the protective cover plate 22 is provided with fastening blocks A25 around its perimeter. The fastening blocks A25 are engaged with the fastening grooves A26 on the right side mounting frame 23 of the main body 2. Mounting rods A27 and B28 are fixedly installed on the right side of the main body 2, which are located in the gear transmission chamber 24. Mounting rod A27 is located in front of mounting rod B28. Mounting rod A27 is rotatably sleeved with a stepped gear A29 through a bearing. Mounting rod B28 is rotatably sleeved with a stepped gear B210 through a bearing.

[0046] The motor 217 is fixed to the upper front side of the main body 2 of the mechanism. The output shaft of the motor 217 is fixedly connected to the transmission gear 211 in the gear transmission chamber 24. The transmission gear 211 meshes with the large gear on the stepped gear A29. The small gear on the stepped gear A29 meshes with the large gear on the stepped gear B210. The small gear on the stepped gear B210 meshes with the rubber roller gear 12.

[0047] The motor 217, transmission gear 211, stepped gear A29, stepped gear B210 and rubber roller gear 12 constitute the gear transmission module that drives the two-inch rubber roller 1 to rotate.

[0048] The rotation of the two-inch rubber roller 1 is powered by a motor 217, which transmits the power to the rubber roller gear 12 through a series of gears, ultimately driving the two-inch rubber roller 1 to rotate. The specific process is as follows:

[0049] Power output: The motor 217 at the upper front of the main body 2 of the movement starts, and its output shaft drives the fixed transmission gear 211 to rotate, providing initial power for the entire transmission system.

[0050] First-stage transmission: The transmission gear 211 meshes with the large gear of the stepped gear A29 on the mounting rod A27. Driven by the transmission gear 211, the stepped gear A29 begins to rotate.

[0051] Secondary transmission: The pinion of the stepped gear A29 meshes with the large gear of the stepped gear B210 on the mounting rod B28. As the stepped gear A29 rotates, its pinion drives the stepped gear B210 to rotate.

[0052] Power is transmitted to the rubber roller: the pinion of the stepped gear B210 meshes with the rubber roller gear 12 located in the gear transmission chamber 24. When the stepped gear B210 rotates, its pinion drives the rubber roller gear 12 to rotate. The rubber roller gear 12 is fixedly sleeved with the two-inch rubber roller 1, ultimately driving the two-inch rubber roller 1 to rotate, thereby completing the auxiliary printing function.

[0053] The left side wall of the main body 2 is rotatably connected to a metal switch plate 3 that abuts against the inner side of the main body 2 and is used to switch the mechanism and the two-inch rubber roller 1. The bottom of the metal switch plate 3 is connected to the thermal sheet substrate 6 through a spring 5. The thermal sheet substrate 6 is used to attach to the TPH and is located above the two-inch rubber roller 1. A switch plate shaft 7 is provided through the thermal sheet substrate 6, and the two ends of the switch plate shaft 7 are provided through the left and right ends of the metal switch plate 3. A torsion spring 701 is sleeved on the switch plate shaft 7 and is limited in the limiting groove 301 on the metal switch plate 3.

[0054] The inner lower end of the main body 2 of the mechanism is provided with a rubber roller bracket 8 for fixing the two-inch rubber roller 1. The left and right sides of the rubber roller bracket 8 are respectively provided with support grooves 801 supporting the rubber roller bushing 11 and the rubber roller gear 12. The rear side of the rubber roller bracket 8 is provided with several mounting holes 802.

[0055] The hardware switch plate 3 is provided with limiting opening grooves 302 on both sides, which limit the outer side of the rubber roller bushing 11 and the rubber roller gear 12 respectively. The hardware switch plate 3 and the limiting opening grooves 302 are located between the rubber roller bracket 8 and the main body 2.

[0056] The inner side of the main body 2 of the machine mechanism is provided with an inclined panel 213 located in front of the two-inch rubber roller 1. Two paper detectors 215 aligned with the two-inch rubber roller 1 are fixedly installed on the inclined panel 213 by screws 214. The inclined panel 213 of the main body 2 of the machine mechanism has a perforated mounting post 216 for mounting and fixing the main body 2 of the machine mechanism.

[0057] The thermal substrate 6 is located above the two-inch roller 1 and is used to bond the TPH (thermal print head), providing a key component for thermal imaging during printing.

[0058] Two paper detectors 215 aligned with the two-inch rubber roller 1 are fixedly installed on the inclined panel 213 by screws 214. These detectors are used to detect the presence and position of paper and ensure the correct paper supply during printing.

[0059] The cover-opening rocker 4, together with the hardware switch plate 3, realizes the switching control of the mechanism and the two-inch rubber roller 1; the rubber roller bracket 8 fixes the rubber roller bushing 11 and the rubber roller gear 12 through the groove 801 to ensure the stable rotation of the rubber roller; the protective cover plate 22 and the mounting frame 23 form a gear transmission chamber 24 to protect the stable operation of the gear transmission system.

[0060] The embedded mechanism of this 2-inch thermal printer is powered by a motor 217, which transmits power to the rubber roller gear 12 via a multi-stage gear transmission module consisting of transmission gear 211, stepped gear A29, and stepped gear B210. This ultimately drives the 2-inch rubber roller 1 to rotate, working in conjunction with the thermal film substrate 6 attached to the TPH (Thermal Printing Panel) above to complete thermal imaging. Simultaneously, the paper detector 215 monitors the paper position in real time to ensure accurate feeding. The cover rocker 4 and the hardware switch plate 3 work together to control the mechanism's on / off switch. The rubber roller bracket 8 and the protective cover 22 are respectively limited and fixed, and sealed for protection, ensuring stable rotation of the rubber roller and preventing external interference with the gear transmission system. Overall, this achieves efficient and stable auxiliary printing functions.

[0061] Compared to existing technologies, the core advantage of this movement lies in its self-designed gears and transmission structure. The stepped gear design optimizes power transmission efficiency, and the multi-stage gear meshing rationally distributes speed and torque, reducing the load on individual gears. Simultaneously, the gears are stronger, and the enclosed protective design of the gear transmission chamber 24 effectively prevents interference from external dust and paper scraps, solving the problems of easy gear wear and increased meshing clearance in traditional transmission modules, significantly improving transmission stability during long-term use.

[0062] In terms of structural stability and functional integration, this mechanism also surpasses existing technologies. The rubber roller engages with the rotating slot 21 of the main body 2 of the mechanism via a bushing, gear, and is supported and limited by the rubber roller bracket 8, ensuring no deviation during rotation. The protective cover 22 forms a closed gear transmission space through the tight fastening of the fastener and the fastener slot, improving the vibration resistance of the overall structure. In addition, the flexible connection design between the thermal sheet substrate 6 and the hardware switch plate 3 ensures the bonding accuracy between the TPH and the rubber roller, and facilitates maintenance and operation. Compared with the simple bushing fixation and open transmission structure in existing technologies, this mechanism has significant improvements in printing accuracy, equipment durability, and ease of operation.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An embedded mechanism for a two-inch thermal printer, characterized in that, include: Two-inch rubber roller (1), with rubber roller bushing (11) and rubber roller gear (12) fixedly sleeved at both ends. The main body of the mechanism (2) is used to fix the TPH and the motor (217); The gear transmission module provides power through the motor (217) and drives the two-inch rubber roller (1) to rotate through the gear transmission to achieve the auxiliary printing function. The gear transmission module also includes a transmission gear (211), a stepped gear A (29), and a stepped gear B (210). The output shaft of the motor (217) is fixedly connected to the transmission gear (211) in the gear transmission chamber (24). The transmission gear (211) meshes with the large gear on the stepped gear A (29). The small gear on the stepped gear A (29) meshes with the large gear on the stepped gear B (210). The small gear on the stepped gear B (210) meshes with the rubber roller gear (12).

2. The embedded mechanism of a two-inch thermal printer according to claim 1, characterized in that: The rubber roller bushing (11) and the rubber roller gear (12) are used to assist the rotation of the two-inch rubber roller (1) and are respectively located in the rotation slots (21) on the left and right sides of the main body (2).

3. The embedded mechanism of a two-inch thermal printer according to claim 1, characterized in that: A protective cover plate (22) is fastened to the right side of the main body (2). The protective cover plate (22) and the mounting frame (23) on the right side of the main body (2) form a gear transmission chamber (24). The rubber roller gear (12) is located inside the gear transmission chamber (24) and passes through the rear opening of the gear transmission chamber (24).

4. The embedded mechanism of a two-inch thermal printer according to claim 3, characterized in that: The left side of the protective cover (22) is provided with fasteners A (25), which are engaged with the fastener slots A (26) on the right mounting frame (23) of the main body (2) of the movement.

5. The embedded mechanism of a two-inch thermal printer according to claim 3, characterized in that: The right side of the main body (2) of the movement is fixed with mounting rod A (27) and mounting rod B (28) located in the gear transmission chamber (24). Mounting rod A (27) is located in front of mounting rod B (28). Step gear A (29) is rotated and sleeved on the outer side of mounting rod A (27) through bearing. Step gear B (210) is rotated and sleeved on the outer side of mounting rod B (28) through bearing.

6. The embedded mechanism of a two-inch thermal printer according to claim 1, characterized in that: The motor (217) is fixed to the upper front side of the main body (2).

7. The embedded mechanism of a two-inch thermal printer according to claim 1, characterized in that: The left side wall of the main body (2) of the mechanism is rotatably connected to the cover opening rocker (4). The cover opening rocker (4) is in contact with the metal switch plate (3) on the inside of the main body (2) to switch the mechanism and the two-inch rubber roller (1). The bottom of the metal switch plate (3) is connected to the thermal sheet substrate (6) through the spring (5). The thermal sheet substrate (6) is used to attach the TPH and is located above the two-inch rubber roller (1).

8. The embedded mechanism of a two-inch thermal printer according to claim 7, characterized in that: A switch plate shaft (7) is provided through the thermal substrate (6). The two ends of the switch plate shaft (7) are provided through the left and right ends of the hardware switch plate (3). A torsion spring (701) is sleeved on the switch plate shaft (7) and is located in the limiting groove (301) on the hardware switch plate (3).

9. The embedded mechanism of a two-inch thermal printer according to claim 1, characterized in that: The inner lower end of the main body (2) of the mechanism is provided with a rubber roller bracket (8) for fixing the two-inch rubber roller (1). The left and right sides of the rubber roller bracket (8) are respectively provided with a support groove (801) supporting the rubber roller bushing (11) and the rubber roller gear (12). The rear side of the rubber roller bracket (8) is provided with several mounting holes (802). The two sides of the hardware switch plate (3) are respectively provided with a limiting opening groove (302) limiting the rubber roller bushing (11) and the outer side of the rubber roller gear (12). The hardware switch plate (3) and the limiting opening groove (302) are located between the rubber roller bracket (8) and the main body (2).

10. The embedded mechanism of a two-inch thermal printer according to claim 1, characterized in that: The inner side of the main body (2) of the machine is provided with an inclined panel (213) located in front of the two-inch rubber roller (1). Two paper detectors (215) aligned with the two-inch rubber roller (1) are fixedly installed on the inclined panel (213) by screws (214).

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