Mechanism capable of adjusting central position of pressure spring of printing head sheet and printer

Abstract

The utility model discloses a printing head sheet pressure spring center position adjustable mechanism and a printer, the printing head sheet pressure spring center position adjustable mechanism comprises a machine core assembly, the machine core assembly comprises a printing head unit and further comprises a movably arranged pressure spring assembly, and when the pressure spring assembly is moved, according to the width specifications of different printing papers, the printing head sheet pressure spring center position can be adjusted. And the mounting position of the pressure spring assembly is freely adjusted to ensure that the center of the pressure spring applied to the printing head unit by the pressure spring assembly always corresponds to the width center of printing paper with different widths. Therefore, the central position of the pressure spring of the adjusting mechanism can be moved and fixed by loosening and locking the adjusting screw in front of the printer, so that when printing paper rolls with different widths are loaded into the printer, the screw can be loosened, and the center of the pressure spring of the printing head sheet is moved to the center of paper and then is fixed; and therefore, the printing effect is ensured, and the poor phenomenon of weak printing caused by center offset of the pressure spring of the printing head sheet due to different paper widths is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to thermal printer technical field, especially relate to a printing head piece pressure spring center position adjustable mechanism and printer. BACKGROUND

[0002] Thermal printer is a kind of printer using thermal printing technology, mainly used for printing thermal printing paper, and its working principle is that the chemical reaction on thermal printing paper is generated by heating element on printing head, the chemical coating on printing paper is changed color, thereby forming text or pattern, and in the printing process, the pressure spring on the back of printing head piece of thermal printer exerts elastic pressure on printing head piece, to ensure that printing pressure is exerted on printing paper between printing head and rubber roller, and printing effect is ensured.

[0003] At present, the installation position of pressure spring of thermal printer is fixed and cannot be freely adjusted. Therefore, when customers use different width printing paper, printing pattern is often unclear, for example, the paper side of the printing paper with narrow width is printed light. INVENTION CONTENTS

[0004] Therefore, the utility model provides a printing head piece pressure spring center position adjustable mechanism and printer to ensure clear printing.

[0005] To achieve the above object, the utility model provides the technical scheme as follows:

[0006] The utility model provides a printing head piece pressure spring center position adjustable mechanism, including movement core subassembly, the movement core subassembly includes printing head unit, still includes pressure spring subassembly, the pressure spring subassembly is movably arranged, and the pressure spring subassembly is moved, to make the elastic pressure center of the pressure spring subassembly to printing head unit always correspond to the width center of different printing paper.

[0007] Further, the movement core subassembly includes the mounting support for assembling the printing head unit, the pressure spring subassembly includes spring seat and pressure spring, the spring seat can be slidably assembled in the mounting support, and the pressure spring is arranged between the spring seat and the printing head unit, the pressure spring is used to exert elastic pressure on the printing head unit, so that the printing head unit exerts printing pressure on printing paper.

[0008] Further, the number of pressure springs is one, and the printing head unit only relies on the elastic pressure of the pressure spring to exert printing pressure on printing paper.

[0009] Further, the print head unit comprises a print head substrate and a print head piece assembled on the print head substrate; the spring seat has a guide column protruding towards the print head substrate, and the compression spring is movably sleeved on the guide column so that the compression force direction of the compression spring is perpendicular to the print head substrate.

[0010] Further, the mounting bracket is provided with a paper cutter, and the mounting bracket is provided with a mounting groove for accommodating the spring seat, the spring seat is movably assembled in the mounting groove, and a detachable fastener is arranged between the spring seat and the paper cutter.

[0011] Further, the paper cutter is provided with a guide groove matched with the fastener, 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 arranged in the guide groove and is detachably fixed on the spring seat.

[0012] Further, the fastener is an adjusting screw.

[0013] The utility model provides a kind of printer, at least comprising the print head piece compression spring center position adjustable mechanism of above.

[0014] By the technical scheme provided by the utility model, the following beneficial effects are achieved:

[0015] By movably arranging the compression spring assembly and adjusting the installation position of the compression spring assembly according to the width specifications of different printing papers, the center of the compression force exerted by the compression spring assembly on the print head unit is always matched with the width center of different printing papers, so that the printing is clear, and the phenomenon of printing light on one side of the paper due to different paper widths is avoided.

[0016] In summary, the compression spring center position is movable and fixed by loosening and locking the adjusting screw in front of a printer, so that when the printer is loaded with printing paper rolls of different widths, the adjusting screw can be loosened, the compression spring center of the print head piece is moved to the center of the paper, and then fixed, so that the printing effect is ensured, and the phenomenon of printing light caused by the deviation of the compression center of the print head piece due to different paper widths is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 shows a schematic view of the print head piece compression spring center position adjustable mechanism when the compression spring assembly is at the leftmost end of the mounting groove in Example 1;

[0018] Figure 2 Fig. 2 shows a schematic view of the print head piece compression spring center position adjustable mechanism when the compression spring assembly is at the rightmost end of the mounting groove in Example 1.

[0019] Figure 3 The diagram shown is an exploded view of the adjustable center position mechanism of the printhead pressure spring in Embodiment 1.

[0020] Figure 4 The figure shown is a cross-sectional view of the adjustable mechanism for the center position of the printhead pressure spring in Embodiment 1.

[0021] Figure 5 The diagram shown is a schematic diagram of the operation of adjusting the position of the fastener in Example 1. Detailed Implementation

[0022] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] Reference Figures 1 to 5 As shown, Embodiment 1 provides an adjustable mechanism for the center position of the printhead pressure spring (hereinafter referred to as the adjustment mechanism) to adjust the center position of the printhead pressure spring of the thermal printer, thereby ensuring the thermal printing effect.

[0026] like Figure 1 As shown, the adjustment mechanism of this embodiment includes a core assembly 1, which includes a printhead unit 11 and a mounting bracket 12 for assembling the printhead unit 11. It also includes a movable pressure spring assembly 2, which can be moved so that the center of the spring force applied by the pressure spring assembly 2 to the printhead unit 11 always corresponds to the center of the width of different printing papers.

[0027] In this embodiment, as Figure 3As shown, the printhead unit 11 comprises a printhead substrate 112 and a printhead piece 111 assembled on the printhead substrate 112, the pressure spring assembly 2 comprises a spring seat 21 and a 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 printhead unit 11, and the pressure spring 22 exerts a spring pressure on the printhead unit 11 to realize that the printhead unit 11 only relies on the spring pressure of the pressure spring 22 to exert a printing pressure on the printing paper, thereby ensuring the thermal printing effect. Of course, in other embodiments, the pressure spring assembly 2 can also adopt a spring piece structure to provide a spring 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 is freely adjusted, and the center of the spring pressure exerted by the pressure spring assembly 2 on the printhead unit 11 is always aligned with or corresponds to the width center of different printing papers, thereby ensuring clear printing, i.e. avoiding the undesirable phenomenon of one side of the paper being printed too light due to different paper widths.

[0029] In another preferred embodiment, as shown in Figure 1 and Figure 3 , the outward side of the mounting bracket 12 is assembled with a paper tearing knife 3, the mounting bracket 12 is provided with a mounting groove 121 accommodating the spring seat 21, the spring seat 21 is slidably assembled in the mounting groove 121, and a detachable fastener is arranged between the spring seat 21 and the paper tearing knife 3, and the specific fastener is an adjusting screw 4.

[0030] Of course, in other embodiments, the fastener can also adopt an elastic clamping structure or a bolt structure to realize fixation; in addition, the spring seat 21 can be screwed or clamped on the mounting bracket 12.

[0031] In particular, the paper tearing knife 3 is provided with a guide groove 31 matched with the adjusting screw 4, the guide groove 31 is rectangular, and the extension directions of the guide 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 extension direction of the printhead piece 111 or the axial direction of the rubber roller of the thermal printer.

[0032] As shown in Figure 4 , the spring seat 21 has a threaded hole, the adjusting screw 4 is movably arranged in the guide groove 31 of the paper tearing knife 3 and is screwed in the threaded hole of the spring seat 21, at this time the mounting bracket 12, the paper tearing knife 3 and the printhead substrate 112 jointly form a moving space 5 for the pressure spring assembly 2 to move.

[0033] In particular, when the locking adjusting screw 4 is locked, the spring seat 21 is tightened and tightly abuts against the inward vertical plane of the paper tearing knife 3 to realize fixation of 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 adjusted between the two limit positions of the left end as Figure 1 shown and the right end as Figure 2 shown, thereby driving the spring seat 21 and the pressure spring 22 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 the problem of uneven printing density when printing the printing paper with different widths.

[0035] Further preferably, as Figure 3 shown, the spring seat 21 has a guiding column 211 extending outwardly towards the printhead base plate 112, and the pressure spring 22 is movably sleeved on the guiding column 211, so that the elastic force direction of the pressure spring 22 is perpendicular to the printhead base plate 112, that is, the vertical state of the pressure spring 22 is always maintained during the adjustment of the installation position of the pressure spring 22, and the pressure spring 22 is also prevented from being tilted and invalid.

[0036] The specific working principle of the adjusting mechanism of the embodiment is as follows,

[0037] The center position of the pressure spring 22 is movable and fixed by loosening and locking the adjusting screw 4 in front of the printer, so that when the printer is loaded with printing paper rolls with different widths, the center of the pressure spring 22 of the printhead piece 111 can be loosened and moved to the center of the paper, and then fixed, so as to ensure the printing effect, and avoid the phenomenon of printing lightness caused by the deviation of the pressure center of the printhead piece 111 due to different paper widths.

[0038] Embodiment two

[0039] Embodiment two provides a printer, which at least comprises the printhead piece pressure spring center position adjustable mechanism of embodiment one.

[0040] Although the present utility model is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made in form and details without departing from the spirit and scope of the present utility model defined in the appended claims, and all such changes are within the protection scope of the present utility model.

Claims

1. A printhead die pressure spring center position adjustable mechanism comprising a core assembly, the core assembly comprising a printhead unit, characterized by: The pressure spring assembly is movably arranged, and the pressure spring assembly is moved so that the center of the pressure spring of the pressure spring assembly always corresponds to the width center of different printing paper. The core assembly comprises a mounting bracket for assembling the printhead unit; the pressure spring assembly comprises a spring seat and a pressure spring, the spring seat is slidably assembled in the mounting bracket, and the pressure spring is arranged between the spring seat and the printhead unit; the pressure spring is used to apply a spring pressure to the printhead unit so that the printhead unit applies a printing pressure to the printing paper.

2. The printhead die pressure spring center position adjustable mechanism of claim 1, wherein: The number of the pressure spring is one, and the printhead unit only relies on the spring pressure of the pressure spring to apply a printing pressure to the printing paper.

3. The printhead die pressure spring center position adjustable mechanism of claim 2, wherein: The printhead unit comprises a printhead substrate and a printhead chip assembled on the printhead substrate; the spring seat has a guide column protruding towards the printhead substrate, and the pressure spring is movably sleeved on the guide column so that the spring pressure direction of the pressure spring is perpendicular to the printhead substrate.

4. The printhead die pressure spring center position adjustable mechanism of claim 2, wherein: The mounting bracket is provided with a paper tearing knife, the mounting bracket is provided with a mounting groove accommodating the pressure spring seat, the spring seat is slidably assembled in the mounting groove, and a detachable fastener is arranged between the pressure spring seat and the paper tearing knife.

5. The printhead die pressure spring center position adjustable mechanism of any of claims 2-4, wherein: The paper tearing knife is provided with a guide groove matched with the fastener, 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 arranged in the guide groove and is detachably fixed on the spring seat.

6. The printhead die pressure spring center position adjustable mechanism of claim 5, wherein: The fastener is an adjusting screw, and the adjusting screw is adjusted from the front of the printer.

7. The printhead die pressure spring center position adjustable mechanism of claim 6, wherein: At least the printhead chip pressure spring center position adjustable mechanism of any one of claims 1-7 is included.

8. A printer characterized by: ​

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