Mechanism capable of adjusting central position of pressure spring of printing head sheet and printer
By designing an adjustable pressure spring center position mechanism in a thermal printer, the problem of unclear printing when printing papers of different widths is solved, and the consistency and clarity of printing effects under different paper widths is achieved.
Patent Information
- Application Number
- CN202510278891.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2025-06-10
AI Technical Summary
In existing thermal printers, the installation position of the pressure spring is fixed and cannot be adjusted, resulting in unclear printing patterns when using printing paper of different widths, especially the poor printing on one side of the paper.
A print head pressure spring center position adjustable mechanism is designed, and the position adjustment of the spring assembly is achieved by setting a movable pressure spring assembly in the movement assembly, and the relaxation and locking of the adjustment screws are used to ensure that the elastic pressure center always corresponds to the width center of different printing papers.
By adjusting the center position of the pressure spring, the pressure centers of the print head sheet can be kept aligned on printing paper of different widths, thereby avoiding the problem of light printing and ensuring clear and consistent printing effects.
Smart Images
Figure CN120116624A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of thermal printers, and particularly relates to an adjustable mechanism for the central position of the pressure spring of a print head sheet and a printer. Background Art
[0002] A thermal printer is a printer that uses thermal printing technology and is mainly used to print thermal printing paper. Its working principle is that a heating element on the print head generates a chemical reaction on the thermal printing paper, causing the chemical coating on the printing paper to change color, thereby forming characters or patterns. During the printing process, a pressure spring on the back of the print head sheet of the thermal printer applies an elastic pressure to the print head sheet to ensure that printing pressure is applied to the printing paper passing between the print head and the rubber roller, thereby ensuring the printing effect.
[0003] Currently, the installation position of the pressure spring in a thermal printer is often set to be fixed and cannot be freely adjusted. Therefore, when a customer uses printing paper of different widths, there often occurs a problem of unclear printed patterns, such as the phenomenon that the printing on one side of the printing paper with a relatively narrow width is relatively light. Summary of the Invention
[0004] To solve the above problems, the present invention provides an adjustable mechanism for the central position of the pressure spring of a print head sheet and a printer to ensure clear printing.
[0005] To achieve the above object, the technical solution provided by the present invention is as follows:
[0006] The present invention provides an adjustable mechanism for the central position of the pressure spring of a print head sheet, including a movement mechanism assembly. The movement mechanism assembly includes a print head unit and further includes a pressure spring assembly; the pressure spring assembly is movably arranged, and the pressure spring assembly is moved so that the center of the elastic pressure applied by the pressure spring assembly to the print head unit always corresponds to the width center of different printing papers.
[0007] Further, the movement mechanism assembly includes a mounting bracket for assembling the print head unit; the pressure spring assembly includes a spring seat and a pressure spring. The spring seat is slidably assembled on the mounting bracket, and the pressure spring is arranged between the spring seat and the print head unit; the pressure spring is used to apply an elastic pressure to the print head unit for the print head unit to apply printing pressure to the printing paper.
[0008] Further, the number of the pressure springs is 1, and the print head unit applies printing pressure to the printing paper only by relying on the elastic pressure of the pressure spring.
[0009] Further, the print head unit includes a print head substrate and a print head chip assembled on the print head substrate; the spring seat has a guide post protruding and extending toward the print head substrate, and the pressure spring is movably sleeved on the guide post so that the elastic force direction of the pressure spring is perpendicular to the print head substrate.
[0010] Further, a paper cutter is assembled on the mounting bracket. The mounting bracket is provided with a mounting groove for accommodating the spring seat. The spring seat is slidably assembled in the mounting groove, and a detachable fastener is provided between the spring seat and the paper cutter.
[0011] Further, the paper cutter is provided with a guide groove for mating with the fastener. The extending directions of the guide groove and the mounting groove are respectively parallel to the width direction of the printing paper; the fastener is movably inserted through the guide groove and detachably fixed to the spring seat.
[0012] Further, the fastener is an adjusting screw.
[0013] The present invention provides a printer, which at least includes the above-mentioned print head chip pressure spring central position adjustable mechanism.
[0014] Through the technical solution provided by the present invention, the following beneficial effects are achieved:
[0015] By configuring the pressure spring assembly to be movably arranged and according to the width specifications of different printing papers, the installation position of the pressure spring assembly can be freely adjusted, and at the same time, it is ensured that the elastic force center applied by the pressure spring assembly to the print head unit always corresponds to the width center of different printing papers, thereby ensuring clear printing, that is, avoiding the bad phenomenon that one side of the paper is printed lightly due to different paper widths.
[0016] In short, the central position of the pressure spring is obtained by loosening and tightening an adjusting screw in front of the printer to achieve the effect of being movable and fixed. When different-width printing paper rolls are loaded into the printer, the adjusting screw can be loosened and the pressure spring center of the print head chip can be moved to the center of the paper and then fixed, so as to ensure the printing effect and avoid the bad phenomenon of light printing caused by the offset of the pressure center of the print head chip due to different paper widths. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 The figure shows a schematic diagram of the print head chip pressure spring central position adjustable mechanism when the pressure spring assembly is at the leftmost end in the mounting groove in the first embodiment;
[0018] Figure 2 The figure shows a schematic diagram of the print head chip pressure spring central position adjustable mechanism when the pressure spring assembly is at the rightmost end in the mounting groove in the first embodiment;
[0019] Figure 3 Shown is an exploded view of the adjustable mechanism for the center position of the pressure spring of the print head sheet in the first embodiment;
[0020] Figure 4 Shown is a cross-sectional view of the adjustable mechanism for the center position of the pressure spring of the print head sheet in the first embodiment;
[0021] Figure 5 Shown is a working schematic diagram of adjusting the position of the fastening member in the first embodiment. Detailed implementation manners
[0022] To further illustrate each embodiment, the present invention provides drawings. These drawings are a part of the disclosure of the present invention, mainly used to illustrate the embodiments, and can be combined with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.
[0023] Now, the present invention will be further described in combination with the drawings and the detailed implementation manners.
[0024] First embodiment
[0025] Refer to Figures 1 to 5 As shown, the first embodiment provides an adjustable mechanism for the center position of the pressure spring of the print head sheet (hereinafter simply referred to as the adjustment mechanism) for adjusting the center position of the pressure spring of the print head sheet of a thermal printer, thereby ensuring the thermal printing effect.
[0026] As Figure 1 shown, the adjustment mechanism of this embodiment includes a movement mechanism assembly 1, the movement mechanism assembly 1 includes a print head unit 11 and a mounting bracket 12 for assembling the print head unit 11, and further includes a pressure spring assembly 2 that is movably arranged. By moving the pressure spring assembly 2, the center of the elastic force applied by the pressure spring assembly 2 to the print head unit 11 always corresponds to the center of the width of different printing papers.
[0027] In this embodiment, as Figure 3 shown, the print head unit 11 includes a print head substrate 112 and a print head sheet 111 assembled on the print head substrate 112. The pressure spring assembly 2 includes 1 spring seat 21 and 1 pressure spring 22. The spring seat 21 is slidably assembled on the mounting bracket 12. The pressure spring 22 is arranged between the spring seat 21 and the print head unit 11. The pressure spring 22 applies an elastic force to the print head unit 11, so that the print head unit 11 can apply a printing pressure to the printing paper only by relying on the elastic force of the pressure spring 22, thereby ensuring the thermal printing effect. Of course, in other embodiments, the pressure spring assembly 2 can also adopt a spring sheet structure to provide elastic force.
[0028] By configuring the pressure spring assembly 2 to be movably arranged and according to the width specifications of different printing papers, the installation position of the pressure spring assembly 2 can be freely adjusted, while ensuring that the center of the elastic pressure exerted by the pressure spring assembly 2 on the print head unit 11 always aligns with or corresponds to the width center of different printing papers, thereby ensuring clear printing, that is, avoiding the poor phenomenon that one side of the paper is printed faintly due to different paper widths.
[0029] In another preferred embodiment, as Figure 1 and Figure 3 shown, a paper cutter 3 is assembled on the outer side of the mounting bracket 12. The mounting bracket 12 is provided with a mounting groove 121 for accommodating the spring seat 21. The spring seat 21 is slidably assembled in the mounting groove 121, and a detachable fastener is provided between the spring seat 21 and the paper cutter 3. Specifically, the fastener is an adjusting screw 4.
[0030] Of course, in other embodiments, the fastener can also be fixed by an elastic clamping structure or a pin structure; in addition, the spring seat 21 can also be screwed or clamped to the mounting bracket 12.
[0031] More specifically, the paper cutter 3 is provided with a guiding groove 31 for cooperating with the adjusting screw 4. The guiding groove 31 is rectangular. The extending directions of the guiding groove 31 and the mounting groove 121 are respectively parallel to the width direction of the printing paper. At this time, the width direction of the printing paper is also parallel to the extending direction of the print head piece 111 or the axial direction of the rubber roller of the thermal printer.
[0032] As Figure 4 shown, the spring seat 21 has a threaded hole. The adjusting screw 4 is movably inserted through the guiding groove 31 of the paper cutter 3 and screwed into the threaded hole of the spring seat 21. At this time, the mounting bracket 12, the paper cutter 3 and the print head substrate 112 together form a moving space 5 for the pressure spring assembly 2 to move.
[0033] During specific use, when the adjusting screw 4 is tightened, the spring seat 21 is tightened and tightly abuts against the inner vertical plane of the paper cutter 3 to fix the spring seat 21 and the pressure spring 22.
[0034] As Figure 5 shown, when the adjusting screw 4 is loosened, the adjusting screw 4 is moved along the guiding direction of the guiding groove 31 to ensure that the spring seat 21 and the pressure spring 22 can be in the leftmost end as Figure 1 shown in the mounting groove 121 and the rightmost end as Figure 2Adjust between the two extreme positions at the rightmost end shown, thereby driving the spring seat 21 and the pressure spring 22 to move to the width center of the printing paper, and then locking the adjusting screw 4 to fix the spring seat 21 and the pressure spring 22 again, so as to avoid problems such as uneven printing density when printing papers of different widths.
[0035] Further preferably, as Figure 3 shown, the spring seat 21 has a guide post 211 protruding and extending towards the print head substrate 112, and the pressure spring 22 is movably sleeved on the guide post 211, so that the elastic force direction of the pressure spring 22 is perpendicular to the print head substrate 112, that is, to ensure that it always remains in a vertical state during the process of adjusting the installation position of the pressure spring 22, and also avoid the inclination and failure of the pressure spring 22.
[0036] The specific working principle of the adjusting mechanism of this embodiment is as follows.
[0037] The central position of the pressure spring 22 is obtained by loosening and locking an adjusting screw 4 in front of the printer to achieve the effect of being movable and fixed. When loading printing paper rolls of different widths into the printer, the adjusting screw 4 can be loosened and the center of the pressure spring 22 of the print head piece 111 can be moved to the center of the paper and then fixed, so as to ensure the printing effect and avoid the problem of uneven printing caused by the offset of the pressure center of the print head piece 111 due to different paper widths.
[0038] Embodiment 2
[0039] Embodiment 2 provides a printer, which at least includes the mechanism for adjusting the center position of the pressure spring of the print head piece in Embodiment 1.
[0040] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them are within the protection scope of the present invention.
Claims
1. A print head chip pressure spring center position adjustable mechanism, comprising a core assembly, the core assembly comprising a print head unit, characterized in that: Also included is a pressure spring assembly; The pressure spring assembly is movably arranged, and the pressure spring assembly is moved so that the center of the pressure spring applied by the pressure spring assembly to the print head unit always corresponds to the width center of different printing papers.
2. The print head chip pressure spring center position adjustable mechanism according to claim 1, characterized in that: The movement assembly includes a mounting bracket for assembling the print head unit; the pressure spring assembly includes a spring seat and a pressure spring, the spring seat can be slidably assembled on the mounting bracket, and the pressure spring is arranged between the spring seat and the print head unit; the pressure spring is used to apply a spring force to the print head unit so that the print head unit applies printing pressure to the printing paper.
3. The print head chip pressure spring center position adjustable mechanism according to claim 2, characterized in that: The number of the pressure springs is one, and the print head unit applies printing pressure to the printing paper only by the elastic force of the pressure springs.
4. The print head chip pressure spring center position adjustable mechanism according to claim 2, characterized in that: The print head unit includes a print head substrate and a print head chip assembled on the print head substrate; the spring seat has a guide column protruding and extending toward the print head substrate, and the pressure spring is movably mounted on the guide column so that the pressure direction of the pressure spring is perpendicular to the print head substrate.
5. The print head chip pressure spring center position adjustable mechanism according to any one of claims 2 to 4, characterized in that: The mounting bracket is equipped with a paper tearing knife, and the mounting bracket is provided with a mounting groove for accommodating the pressure spring seat. The spring seat is slidably mounted in the mounting groove, and a detachable fastener is provided between the pressure spring seat and the paper tearing knife.
6. The print head chip pressure spring center position adjustable mechanism according to claim 5, characterized in that: The paper tearing knife is provided with a guide groove matching the fastener, and the extension directions of the guide groove and the mounting groove are respectively parallel to the width direction of the printing paper; the fastener is movably inserted into the guide groove and detachably fixed to the spring seat.
7. The print head chip pressure spring center position adjustable mechanism according to claim 6, characterized in that: The fastener is an adjustment screw, and the adjustment screw is adjusted from the front of the printer.
8. A printer, characterized in that: At least comprises the print head chip pressure spring center position adjustable mechanism as described in any one of claims 1-7.