A cash register printer and a guide module thereof

Abstract

The utility model discloses a printer for cash register and its direction module relates to printing equipment field. Aim at the problem of difficult paper changing operation and easy paper jam of traditional fixed direction structure, it includes casing, rubber roll conveying component, liftable print head, mounting plate and return spring, the mounting plate is fixedly connected with paper direction component, is slidably connected with casing through vertical direction structure and is fixed with print head, and the return spring is arranged between the mounting plate and casing. Through the linkage design of print head and mounting plate, only when printing, the rubber roll cooperates with print head to hold paper, under the non - printing state, the mounting plate is automatically raised under the action of return spring, and the height of the supporting platform is higher than the rubber roll, so that the cashier can avoid the rubber roll and easily insert the paper head without accurate alignment, the stability when changing paper is increased, the bending and curling problem caused by the paper head in advance contacting the rubber roll is avoided, and the paper changing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and in particular to a cash register printer and its guide module. Background Technology

[0002] Thermal printers are widely used in commercial point-of-sale (POS) systems due to their compact design and high printing speed. However, the internal space of POS machines is limited, the paper path is short, and frequent paper roll changes are necessary. Traditional fixed guide structures have significant drawbacks: after changing the paper roll, cashiers must manually and precisely insert the flexible paper roll into a narrow gap adjacent to the rubber roller. During this process, the paper roll is prone to prematurely colliding with and pressing against the surface of the rubber roller, causing the paper roll to bend and curl, leading to paper jams and severely impacting checkout efficiency and user experience. Utility Model Content

[0003] Purpose of the invention: The purpose of this utility model is to address the aforementioned deficiencies of the prior art by providing a POS printer and its guide module. Through a linkage lifting guide structure, the print head drives the mounting plate to rise when not printing, raising the platform to a height higher than the rubber roller. This allows for easy paper insertion without manual alignment, avoiding the rubber roller and solving the problems of cumbersome paper changing operations and paper jams in traditional fixed structures. At the same time, by optimizing the guide components, smooth paper delivery and flattening are achieved, improving the stability and efficiency of the printer in high-frequency transaction scenarios.

[0004] Technical solution

[0005] A guide module for a cash register printer, comprising: case; A rubber roller conveying assembly, located inside the housing, includes a rubber roller and a motor for driving the rubber roller to rotate; A printing assembly, located above the rubber roller conveying assembly, includes a liftable printhead; Paper guiding components; Mounting plate, the paper guide assembly is fixed on the mounting plate, the mounting plate is located at the front end of the paper feed side of the rubber roller, the mounting plate is slidably connected to the housing through a vertical guide structure, the mounting plate includes two oppositely arranged side plates and a bottom plate for connecting the two side plates, the bottom plate constitutes a lifting platform for supporting the paper in the non-printing state, the mounting plate is fixedly connected to the print head, and the top surface of the lifting platform is higher than the upper edge of the rubber roller in the non-printing state; A return spring is located between the mounting plate and the housing.

[0006] Optionally, the vertical guide structure includes a guide slider disposed on the side end of the mounting plate and a vertical groove formed on the housing, wherein the guide slider and the vertical groove are slidably engaged.

[0007] Optionally, the reset spring is a compression spring, which is fixedly installed at the lower end of the guide slider. One end of the reset spring is fixedly connected to the bottom support surface of the housing, and the other end is fixedly connected to the lower end surface of the guide slider of the mounting plate.

[0008] Optionally, the paper guiding assembly includes a plurality of guide rollers rotatably mounted on a mounting plate.

[0009] Optionally, the guide roller surface is provided with flattening thread grooves, the texture of which extends from the middle of the guide roller to both ends.

[0010] Optionally, the flattened threaded groove has a herringbone symmetrical structure.

[0011] Optionally, the motor and the rubber roller are connected by a gear set.

[0012] Optionally, the surface of the rubber roller is provided with an elastic rubber layer.

[0013] A cash register printer includes a guide module as described above.

[0014] Beneficial effects: Through the linkage design between the print head and the mounting plate, the rubber roller only engages with the print head to hold the paper during printing. When not printing, the mounting plate automatically rises under the action of the return spring, and the height of the lifting platform is higher than that of the rubber roller. Cashiers can easily insert the paper without precisely aligning it to avoid the rubber roller, which increases the stability when changing paper and avoids the bending and curling problems caused by the paper contacting the rubber roller in advance, thus improving the efficiency of changing paper. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention in cross-section. Figure 1 ; Figure 3 This is a schematic diagram of the internal structure of the present invention in cross-section. Figure 2 ; Figure 4 This is an enlarged schematic diagram showing the position of the rubber roller conveying assembly of this utility model; Figure 5 This is a schematic diagram of the structure of the guide roller of this utility model. Detailed Implementation

[0016] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1-5 As shown, a guide module for a cash register printer includes: Casing 1; The rubber roller conveying assembly 2 is located inside the housing 1 and includes a rubber roller 21 and a motor 22 for driving the rubber roller 21 to rotate. The rotational power provided by the motor 22 is transmitted to the rubber roller 21 through a transmission structure, causing the rubber roller 21 to rotate continuously. The friction between the surface of the rubber roller 21 and the paper drives the paper to move along the paper feeding path, thereby realizing the continuous conveying of the printing media. It is the power core of the paper feeding system.

[0018] The printing assembly 3, located above the rubber roller conveying assembly 2, includes a liftable printhead 31. In the non-printing state, the printhead 31 remains raised, maintaining a certain distance from the surface of the rubber roller 21 to form an unobstructed paper feeding path. During printing, it lowers and cooperates with the rubber roller 21 to clamp the paper, simultaneously forming images and text on the paper surface using thermal or dot matrix printing principles, ensuring the continuity and clarity of the printed content. The structure of the printhead 31 and the structure driving its raising and lowering are common existing technologies and will not be described in detail here.

[0019] Paper guiding component 4 is used to guide the printing paper; the preset channel structure restricts the longitudinal and lateral deviation of the paper, ensuring that the paper enters the printing area along a fixed path, while reducing the frictional resistance between the paper and the component, and avoiding printing misalignment or paper jam caused by paper skew. Mounting plate 5, the paper guide assembly 4 is fixed on mounting plate 5, mounting plate 5 is located at the front end of paper feed side of rubber roller 21, mounting plate 5 is slidably connected to housing 1 through vertical guide structure 51, mounting plate 5 includes two oppositely arranged side plates and a bottom plate for connecting the two side plates, the bottom plate constitutes a lifting platform for supporting paper in non-printing state, mounting plate 5 is fixedly connected to print head 31, the top surface of the lifting platform is higher than the upper edge of rubber roller 21 in non-printing state; The reset spring 6 is located between the mounting plate 5 and the housing 1. It provides an upward elastic support force to the mounting plate 5, keeping the mounting plate 5 in a raised position when not printing. At this time, the height of the lifting platform is higher than the upper edge of the rubber roller 21, which prevents the paper from contacting the rubber roller 21 and causing bending or curling when the paper is inserted, thus greatly reducing the difficulty of paper insertion. During printing, the reset spring 6 is compressed to store energy. After printing, the energy is released to automatically reset the mounting plate 5 and the print head 31, realizing automatic adjustment of the height of the print head 31 and the base plate.

[0020] The vertical guide structure 51 includes a guide slider 511 disposed on the side end of the mounting plate 5 and a vertical slide groove 512 formed on the housing 1. The guide slider 511 and the vertical slide groove 512 are slidably engaged. The precise engagement between the guide slider 511 and the vertical slide groove 512 (fitting clearance 0.05~0.1mm) limits the movement direction of the mounting plate 5, ensuring that it only moves up and down in the vertical direction, avoiding guide deviation caused by lateral swaying; at the same time, the low coefficient of sliding friction ensures smooth lifting and lowering, reducing abnormal paper feeding caused by jamming.

[0021] The return spring 6 is a compression spring, which is fixedly installed at the lower end of the guide slider 511. One end of the return spring 6 is fixedly connected to the bottom support surface of the housing 1, and the other end is fixedly connected to the lower end surface of the guide slider 511 of the mounting plate 5. Integrating the return spring 6 into the guide slider 511 makes the direction of the elastic force completely consistent with the lifting direction of the mounting plate 5, resulting in higher force transmission efficiency and avoiding slider wear or jamming caused by eccentric force. At the same time, the structure of the guide slider 511 protects the return spring 6, preventing paper scraps from getting tangled and affecting the elasticity of the return spring 6, thus extending its service life.

[0022] The paper guiding assembly 4 includes a plurality of guide rollers 41 rotatably mounted on the mounting plate 5. The guide rollers 41 are connected to the mounting plate 5 via bearings and can rotate freely with the movement of the paper, converting the sliding friction between the paper and the paper guiding assembly 4 into rolling friction, reducing the coefficient of friction from 0.3-0.5 to 0.05-0.1, significantly reducing the paper feeding resistance and avoiding paper wrinkles or tears caused by excessive resistance.

[0023] The guide roller 41 has a flattening thread groove 411 on its surface, the groove of which extends from the middle of the guide roller 41 to both ends. When the guide roller 41 rotates with the paper, the flattening thread groove 411 contacts the paper surface and generates a radially outward component force, which can stretch the edges of the paper to both sides, eliminating curling and wrinkles caused by storage or moisture, ensuring that the paper enters the printing area flat and improving print quality.

[0024] The flattening threaded groove 411 has a herringbone symmetrical structure. The symmetrical herringbone pattern ensures that the tensile force on both sides of the paper is balanced, avoiding paper deviation caused by unilateral force. At the same time, the central pattern converges at the axis of the guide roller 41, which can guide the paper to align with the center, further ensuring the accuracy of the paper feeding path.

[0025] The motor 22 and the rubber roller 21 are connected by a gear set 23. The gear set 23 converts the high speed of the motor 22 into the appropriate speed of the rubber roller 21 through a reasonable transmission ratio, while increasing the output torque. This ensures that the rubber roller 21 is not prone to slipping when clamping paper, resulting in high transmission accuracy and a compact structure that is suitable for the confined space of a cash register printer.

[0026] The surface of the rubber roller 21 is provided with an elastic rubber layer. The elastic rubber layer (Shore hardness 50-60HA) has a certain deformation capacity and can adapt to printing paper of different thicknesses (50-100μm) by changing the amount of compression, ensuring stable contact pressure between the paper and the rubber roller and the print head; at the same time, the rubber material has a high coefficient of friction, which can provide sufficient driving force and prevent the paper from slipping.

[0027] The paper guide assembly 4 achieves adaptive working state switching through a "linkage lifting + elastic reset" mechanism: When not printing / changing paper, the print head 31 is in the raised position, the reset spring 6 releases its elastic force, and pushes the mounting plate 5 upward along the guide slider 511 and vertical slide groove 512 of the vertical guide structure 51. At this time, since the height of the lifting platform is higher than the upper edge of the rubber roller 21, the cashier can avoid the paper head from contacting the rubber roller 21 in advance when inserting the paper head, which increases the stability during paper changing and avoids the paper head contacting the rubber roller 21, which may cause bending or curling problems, thus improving the paper changing efficiency; when printing, the print head 31 is driven to move downward, and the mounting plate 5 is synchronously driven to overcome the resistance of the paper head through a rigid connection. The spring 6 moves downward until the print head 31 engages with the rubber roller 21 to clamp the paper. At this time, the motor 22 drives the rubber roller 21 to rotate via the gear set 23, using friction to transport the paper. The guide roller 41 rotates with the paper and flattens the paper through the herringbone flattening groove 411 on its surface. The elastic rubber layer on the surface of the rubber roller 21 adapts to the paper thickness through slight deformation to ensure stable contact. After printing, the print head 31 rises, and the reset spring 6 pushes the mounting plate 5 upward, causing the guide roller 41 to separate from the rubber roller 21 to await the next operation. This mechanism simplifies the paper changing process while ensuring stable printing, fundamentally solving the paper feeding problem during paper changing in traditional fixed structures.

[0028] Furthermore, this embodiment proposes a cash register printer, including a guide module of a cash register printer as described in the above embodiments.

[0029] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A guide module for a cash register printer, characterized in that, include: Shell (1); The rubber roller conveying assembly (2) is located inside the housing (1) and includes a rubber roller (21) and a motor (22) for driving the rubber roller (21) to rotate. The printing assembly (3), located above the rubber roller conveying assembly (2), includes a liftable print head (31). Paper guiding component (4); Mounting plate (5), the paper guide assembly (4) is fixed on the mounting plate (5), the mounting plate (5) is located at the front end of the paper feed side of the rubber roller (21), the mounting plate (5) is slidably connected to the housing (1) through the vertical guide structure (51), the mounting plate (5) includes two oppositely arranged side plates and a bottom plate for connecting the two side plates, the bottom plate constitutes a lifting platform for supporting the paper in the non-printing state, the mounting plate (5) is fixedly connected to the print head (31), and the top surface of the lifting platform is higher than the upper edge of the rubber roller (21) in the non-printing state; A reset spring (6) is located between the mounting plate (5) and the housing (1).

2. The guide module for a cash register printer according to claim 1, characterized in that, The vertical guide structure (51) includes a guide slider (511) disposed on the side of the mounting plate (5) and a vertical groove (512) opened on the housing (1), wherein the guide slider (511) and the vertical groove (512) are in sliding cooperation.

3. The guide module for a cash register printer according to claim 1, characterized in that, The reset spring (6) is a compression spring. The reset spring (6) is fixedly installed at the lower end of the guide slider (511). One end of the reset spring (6) is fixedly connected to the bottom support surface of the housing (1), and the other end of the reset spring (6) is fixedly connected to the lower end surface of the guide slider (511) of the mounting plate (5).

4. The guide module for a cash register printer according to claim 1, characterized in that, The paper guiding assembly (4) includes a plurality of guide rollers (41) rotatably mounted on a mounting plate (5).

5. The guide module for a cash register printer according to claim 4, characterized in that, The guide roller (41) has a flattened thread groove (411) on its surface, and the texture of the flattened thread groove (411) extends from the middle of the guide roller (41) to both ends.

6. The guide module for a cash register printer according to claim 5, characterized in that, The flattened thread groove (411) has a herringbone symmetrical structure.

7. The guide module for a cash register printer according to claim 1, characterized in that, The motor (22) and the rubber roller (21) are connected by a gear set (23).

8. The guide module for a cash register printer according to claim 1, characterized in that, The surface of the rubber roller (21) is provided with an elastic rubber layer.

9. A printer for cash registers, characterized in that, Includes a guide module for a cash register printer as described in any one of claims 1 to 8.

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