Thermal printer core and thermal printer

Abstract

The utility model discloses a thermal printer core and a thermal printer, the thermal printer core comprises a mounting rack, a rubber roller switch plate and a printing head substrate, the rubber roller switch plate and the printing head substrate are rotatably assembled on the mounting rack, the rubber roller switch plate is arranged between the printing head substrate and the mounting rack, and a first elastic reset piece is arranged between the mounting rack and the printing head substrate. The rubber roller switch plate is provided with a receding through hole for receding the first elastic reset piece, the first elastic reset piece penetrates through the receding through hole, one end of the first elastic reset piece is connected with the installation frame, and the other end of the first elastic reset piece is connected with the printing head base plate so as to apply elastic force towards the rubber roller to the printing head base plate. The total elastic force borne by the rubber roller switch plate can be effectively reduced, so that local deformation of the rubber roller switch plate is avoided, and normal printing is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal printers, in particular to a thermal printer core and a thermal printer. Background Art

[0002] Generally, the movement of a thermal printer includes a mounting frame, a motor, a transmission gear set, a rotatable rubber roller, a rubber roller switch plate and a print head substrate arranged on the mounting frame, and the print head substrate is equipped with a print head (TPH for short). When working, the motor drives the transmission gear set and transmits power to the rubber roller to rotate the rubber roller, thereby driving the printing paper through the paper feed channel between the rubber roller and the print head substrate. At the same time, the elastic force applied by the elastic reset member (such as a spring) provided between the print head substrate and the rubber roller switch plate is limited so that the print head on the print head substrate presses the printing paper against the surface of the rubber roller to ensure a good printing effect.

[0003] The existing thermal printer movement is equipped with a certain number of springs. After the thermal printer cover is opened and closed multiple times, the elastic force formed by multiple springs located in the middle area and other areas is all concentrated on the rubber roller switch plate, which can easily cause local deformation of the rubber roller switch plate and eventually cause printing abnormalities. Utility Model Content

[0004] To this end, in order to solve the above-mentioned problem, the utility model provides a thermal printer movement and a thermal printer, which can effectively reduce the total elastic force on the rubber roller switch plate to avoid local deformation of the rubber roller switch plate, thereby ensuring normal printing, under the premise that the total number of elastic reset parts of the thermal printer movement remains unchanged.

[0005] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0006] The utility model provides a thermal printer movement, comprising a mounting frame, a rubber roller switch plate and a print head substrate rotatably mounted on the mounting frame; the rubber roller switch plate is arranged between the print head substrate and the mounting frame; a first elastic reset member is arranged between the mounting frame and the print head substrate, the rubber roller switch plate has a clearance through hole for letting the first elastic reset member pass, the first elastic reset member passes through the clearance through hole, one end of the first elastic reset member is connected to the mounting frame, and the other end is connected to the print head substrate, so as to apply an elastic force toward the rubber roller to the print head substrate.

[0007] Furthermore, a second elastic reset member is provided between the print head substrate and the rubber roller switch plate.

[0008] Furthermore, the number of the first elastic return member and the second elastic return member is two each, and the two first elastic return members are located between the two second elastic return members; the first elastic return member and the second elastic return member are symmetrically arranged.

[0009] Furthermore, the first elastic return member is a spring or a spring sheet; the second elastic return member is a spring or a spring sheet.

[0010] Furthermore, the spring is a tower spring.

[0011] Furthermore, the print head substrate and the rubber roller switch plate both have a pivot hole for pivotally connecting the mounting frame, and the mounting frame has a pivot shaft that matches the pivot hole, and the pivot shaft passes through the pivot holes of the rubber roller switch plate and the print head substrate in sequence to form a rotatable arrangement.

[0012] Furthermore, the pivot hole of the print head substrate is a waist-shaped hole or a round hole.

[0013] Furthermore, the print head substrate has a limiting boss located at its bottom and a bent edge close to the limiting boss, and one end of the first elastic reset member close to the print head substrate is limited by the limiting boss and the bent edge; and / or one end of the second elastic reset member close to the print head substrate is limited by the limiting boss and the bent edge.

[0014] Furthermore, the mounting frame is provided with a micro switch for sensing the mounting position of the rubber roller on the mounting frame.

[0015] The utility model also provides a thermal printer, which at least comprises the thermal printer core.

[0016] The technical solution provided by the utility model has the following beneficial effects:

[0017] By passing the first elastic reset member through the yield hole of the rubber roller switch plate, the elastic force applied by the first elastic reset member to the rubber roller switch plate can be effectively reduced, while ensuring that the print head substrate elastically presses the rubber roller. In this way, under the premise that the total number of elastic reset members of the thermal printer movement remains unchanged, the total elastic force on the rubber roller switch plate can be effectively reduced to avoid local deformation of the rubber roller switch plate, thereby ensuring normal printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a cross-sectional view of the thermal printer mechanism in the first embodiment;

[0019] Figure 2 Shown Figure 1 A magnified schematic diagram of area A in the middle;

[0020] Figure 3 The figure shows a schematic diagram of the structure of the thermal printer mechanism in the first embodiment;

[0021] Figure 4 Shown is a schematic diagram of a print head substrate in Embodiment 1;

[0022] Figure 5 Shown is a schematic diagram of the rubber roller switch plate in Example 1;

[0023] Figure 6 Shown is a schematic diagram of the mounting frame in the first embodiment. DETAILED DESCRIPTION

[0024] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which 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 contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0025] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0026] Embodiment 1

[0027] Reference Figures 1 to 3 As shown, embodiment 1 provides a thermal printer movement, including a mounting frame 1 and a rubber roller switch plate 2 and a print head substrate 3 rotatably mounted on the mounting frame 1, the rubber roller switch plate 2 is arranged between the print head substrate 3 and the mounting frame 1, a first elastic reset member 4 is arranged between the mounting frame 1 and the print head substrate 3, the rubber roller switch plate 2 has a clearance through hole 21 for giving way to the first elastic reset member 4, the first elastic reset member 4 passes through the clearance through hole 21, and one end of the first elastic reset member 4 is connected to the mounting frame 1, and the other end is connected to the print head substrate 3, so as to apply an elastic force toward the rubber roller 7 to the print head substrate 3.

[0028] In this embodiment, Figure 3 As shown, the rubber roller 7 is rotatably arranged on the mounting frame 1 and is driven by a motor 8 and a transmission gear set 9 arranged on the mounting frame 1 to realize the rotation of the rubber roller 7 .

[0029] A second elastic reset member 5 is arranged between the print head substrate 3 and the rubber roller switch plate 2, one end of the second elastic reset member 5 is fixedly connected to the rubber roller switch plate 2, and the other end is fixedly connected to the print head substrate 3, and the first elastic reset member 4 and the second elastic reset member 5 are both elastic reset members of the thermal printer movement, and respectively apply elastic force toward the rubber roller 7 to the print head substrate 3, so that the print head substrate 3 elastically presses the rubber roller 7, thereby ensuring the printing effect.

[0030] By passing the first elastic reset member 4 through the yielding hole 21 of the rubber roller switch plate 2, the elastic force applied by the first elastic reset member 4 to the rubber roller switch plate 2 can be effectively reduced, while ensuring that the print head substrate 3 elastically presses the rubber roller 7. In this way, under the premise that the total number of elastic reset members of the thermal printer movement remains unchanged, the total elastic force on the rubber roller switch plate 2 can be effectively reduced to avoid local deformation of the rubber roller switch plate 2, thereby ensuring normal printing.

[0031] In another preferred embodiment, Figure 1 As shown, the number of the first elastic return members 4 and the second elastic return members 5 is two each, and the two first elastic return members 4 are located between the two second elastic return members 5, and the first elastic return members 4 and the second elastic return members 5 are symmetrically arranged.

[0032] In specific implementation, the first elastic return member 4 and the second elastic return member 5 are both tower springs, one end of which has a small diameter and is installed on the support plate 12 or the rubber roller switch plate 2, and the other end has a large diameter and is installed on the print head substrate 3, so as to form a further stable elastic support for the print head substrate 3.

[0033] like Figure 6 The mounting frame 1 shown includes two side mounting plates 11 and a support plate 12 located between the two side mounting plates 11. The rubber roller 7, the rubber roller switch plate 2 and the print head substrate 3 are rotatably mounted on the side mounting plates 11, and the transmission gear set 9 is mounted on one side of the side mounting plate 11.

[0034] One end of the two first elastic reset members 4 facing away from the print head substrate 3 is fixedly mounted on the middle of the support plate 12 , and the other end is fixedly mounted on the bottom of the print head substrate 3 .

[0035] More specifically, Figure 4 As shown, the print head substrate 3 has a limiting boss 32 at its bottom and a bending edge 33 close to the limiting boss 32 , and the ends of the first elastic reset member 4 and the second elastic reset member 5 close to the print head substrate 3 are both limited by the limiting boss 32 and the bending edge 33 .

[0036] In this specific embodiment, there are two limiting bosses 32 for each spring. The two limiting bosses 32 and at least one bent edge 33 form a triangular limiting groove. The end of the spring facing away from the print head substrate 3 is inserted into the triangular limiting groove to form a stable limiting fixation.

[0037] Furthermore, by setting the two long sides of the print head substrate 3 as the bent sides 33 , the anti-deformation capability of the print head substrate 3 can be effectively enhanced.

[0038] Of course, in other embodiments, the first elastic restoring member 4 may also be a spring sheet, and the second elastic restoring member 5 may also be a spring sheet, so that the print head substrate 3 can also be elastically pressed against the rubber roller 7 .

[0039] Moreover, one end of the first elastic reset member 4 close to the print head substrate 3 is limited by the limiting boss 32 and the bending edge 33, or one end of the second elastic reset member 5 close to the print head substrate 3 is limited by the limiting boss 32 and the bending edge 33, and the other elastic reset members are fixed in a conventional manner.

[0040] In addition, the end of the spring facing away from the print head substrate 3 can also be firmly fixed by a positioning boss, and the number of the first elastic reset member 4 and the second elastic reset member 5 is not limited thereto, and can also be 4, 6 or 8 or more.

[0041] In another preferred embodiment, Figure 4 The print head substrate 3 shown and Figure 5 The rubber roller switch plates 2 shown in the drawings all have pivot holes for pivotally connecting the mounting frame 1, such as Figure 6 The mounting frame 1 shown has a pivot shaft that matches the pivot hole, and the pivot shaft passes through the pivot holes of the rubber roller switch plate 2 and the print head substrate 3 in sequence to form a rotatable arrangement to ensure that the print head substrate 3 and the rubber roller switch plate 2 can rotate around the pivot shaft of the mounting frame 1 within a certain angle range, and the pivot hole 31 of the print head substrate 3 is a waist-shaped hole, which can effectively prevent the concentricity of the pivot shaft from being insufficient due to the excessive printing width or the width of the printing paper, thereby avoiding the print head substrate 3 from getting stuck, so as to ensure the reliability of the thermal printer movement.

[0042] Of course, in other embodiments, the pivot hole 31 of the print head substrate 3 may also be a round hole.

[0043] In another preferred embodiment, Figure 3 As shown, the mounting frame 1 is provided with a micro switch for sensing the mounting position of the rubber roller 7 on the mounting frame 1 , and the micro switch is mounted on a side mounting plate 11 on at least one side of the mounting frame 1 .

[0044] When the rubber roller 7 is installed in the slot of the side mounting plate 11 of the mounting frame 1, the micro switch can effectively monitor whether the installation position of the rubber roller 7 is correct, and promptly remind the user to install the rubber roller 7 in place before printing to prevent subsequent printing abnormalities.

[0045] Embodiment 2

[0046] Embodiment 2 provides a thermal printer, which at least includes the thermal printer mechanism of embodiment 1.

[0047] By passing the first elastic reset member through the yield hole of the rubber roller switch plate, the elastic force applied by the first elastic reset member to the rubber roller switch plate can be effectively reduced, while ensuring that the print head substrate elastically presses the rubber roller. In this way, under the premise that the total number of elastic reset members of the thermal printer movement remains unchanged, the total elastic force on the rubber roller switch plate can be effectively reduced to avoid local deformation of the rubber roller switch plate, thereby ensuring normal printing.

[0048] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A thermal printer movement, characterized in that: It comprises a mounting frame, and a rubber roller switch plate and a print head substrate rotatably mounted on the mounting frame; The rubber roller switch plate is arranged between the print head substrate and the mounting frame; A first elastic reset member is arranged between the mounting frame and the print head substrate, and the rubber roller switch plate has a through hole for making way for the first elastic reset member. The first elastic reset member passes through the through hole, and one end of the first elastic reset member is connected to the mounting frame, and the other end is connected to the print head substrate to apply an elastic force toward the rubber roller to the print head substrate.

2. The thermal printer mechanism according to claim 1, characterized in that: A second elastic reset member is arranged between the print head substrate and the rubber roller switch plate.

3. The thermal printer mechanism according to claim 2, characterized in that: The number of the first elastic return member and the number of the second elastic return member are two, and the two first elastic return members are located between the two second elastic return members; the first elastic return member and the second elastic return member are symmetrically arranged.

4. The thermal printer mechanism according to claim 2, characterized in that: The first elastic return member is a spring or a spring sheet; the second elastic return member is a spring or a spring sheet.

5. The thermal printer mechanism according to claim 4, characterized in that: The spring is a tower spring.

6. The thermal printer mechanism according to any one of claims 1 to 5, characterized in that: The print head substrate and the rubber roller switch plate both have pivot holes for pivoting the mounting frame, and the mounting frame has a pivot shaft that matches the pivot hole. The pivot shaft passes through the pivot holes of the rubber roller switch plate and the print head substrate in sequence to form a rotatable arrangement.

7. The thermal printer mechanism according to claim 6, characterized in that: The pivot hole of the print head substrate is a waist-shaped hole or a round hole.

8. The thermal printer mechanism according to any one of claims 2 to 5, characterized in that: The print head substrate has a limiting boss located at its bottom and a bent edge close to the limiting boss; one end of the first elastic reset member close to the print head substrate is limited by the limiting boss and the bent edge; and / or one end of the second elastic reset member close to the print head substrate is limited by the limiting boss and the bent edge.

9. The thermal printer mechanism according to any one of claims 1 to 5, characterized in that: The mounting frame is provided with a micro switch for sensing the mounting position of the rubber roller on the mounting frame.

10. A thermal printer, characterized in that: At least comprises the thermal printer movement described in any one of claims 1-9.

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