Mechanism with printing head lifting function

Abstract

The utility model discloses a mechanism with a printing head lifting function. The mechanism comprises a driving motor, a printing head support, a printing paper pressing wheel, a cam, a lifting motor, a printing head limiting cap, a spring, a pressing wheel shaft, a rubber roller, a lower shell, a printing paper shaft, an upper shell, printing paper, a rubber roller gear, a driving gear and a printing head. And the printing head is rigidly connected with the printing head bracket through a screw. The printing head support is elastically connected to the upper shell through the spring and the printing head limiting cap. The cam is fixed to the lifting motor, and the face of the cam makes contact with the printing head limiting cap. The printing paper pressing wheel is fixed to the upper shell through a pressing wheel shaft. The rubber roller gear is fixed at one end of the rubber roller, the driving gear is fixed on the driving motor, and the driving gear is meshed with the rubber roller gear. The printing paper shaft penetrates through the center of the printing paper and is placed on the lower shell. The upper shell and the lower shell are connected through a shaft, and opening and closing states can be switched. When the printer works, the driving motor drives the rubber roller to roll through the driving gear and the rubber roller gear, the printing paper outlet position discharges paper under the action of the printing paper pressing wheel and the rubber roller, and the printing head is pressed on the printing paper under the action of the spring. When a blank area is printed, the printing head does not need to work, at the moment, the lifting motor moves to drive the cam to rotate in the forward direction, and the cam jacks up the printing head limiting cap, so that the printing head ascends to leave printing paper; when normal printing is needed, the lifting motor drives the cam to rotate reversely, and the printing head is put down, so that the printing head is pressed on the printing paper again for printing work. The device is simple in structure, stable in work and high in reliability.

Description

Technical Field

[0001] This utility model relates to the field of printers, and in particular to a mechanism with a lifting printhead function. Background Technology

[0002] In modern society, printers are becoming increasingly common. They are also widely used in medical laboratories. Printers make recording experimental data more convenient and accurate. In older printers, the print head always kept the paper pressed down during printing, even in areas where printing was unnecessary. This caused wear and tear on the print head, reducing its lifespan. More importantly, when printing on coated or matte paper, a ribbon was required. In this case, with the print head pressing down on both the ribbon and paper, the ribbon would still roll forward in blank areas, resulting in significant ribbon waste. Summary of the Invention

[0003] To address the problems in current technology, this invention provides a mechanism with a lifting printhead function. When printing a blank area, the printhead is raised, preventing contact between the printhead and the paper or ribbon, thus avoiding wear and ribbon waste. When printing content, the printhead is lowered, pressing down on the paper and ribbon to perform the printing operation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: When printing a blank area, the print head does not need to work. At this time, the lifting motor moves, driving the cam to rotate in the forward direction. The cam lifts the print head limit cap, causing the print head to rise and leave the printing paper. When normal printing is required, the lifting motor drives the cam to rotate in the reverse direction, lowering the print head so that the print head is pressed back onto the printing paper for printing.

[0005] Preferably, when the printer is working, the drive motor drives the rubber roller to roll through the drive gear and the rubber roller gear. The paper is ejected from the paper ejection position by the action of the paper pressure roller and the rubber roller, and the print head is pressed onto the paper by the action of the spring.

[0006] The beneficial effects of this invention are as follows: the print head can be raised or lowered according to the actual printing situation, making the distance between the print head and the printing paper controllable and reducing print head wear. If printing on coated paper or matte silver paper is required, the installation of a ribbon can reduce ribbon waste. Attached Figure Description

[0007] Figure 1 This is a perspective view of the present invention.

[0008] Figure 2 This is the front view of this utility model.

[0009] Figure 3 This is the left view of this utility model.

[0010] Figure 4 This is a top view of the present invention.

[0011] Figure 5 This is a partial enlarged view of the printhead lifting mechanism of this utility model.

[0012] Figure 6 This is an exploded view of this utility model.

[0013] In the figure: drive motor (1), print head bracket (2), paper pressure roller (3), cam (4), lifting motor (5), print head limit cap (6), spring (7), pressure roller shaft (8), rubber roller (9), lower shell (10), paper shaft (11), upper shell (12), paper (13), rubber roller gear (14), drive gear (15), print head (16). Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0015] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Please see Figures 1 to 6This utility model provides an embodiment of a mechanism with a lifting printhead function, including a drive motor (1), a printhead support (2), a paper pressure roller (3), a cam (4), a lifting motor (5), a printhead limiting cap (6), a spring (7), a pressure roller shaft (8), a rubber roller (9), a lower shell (10), a paper shaft (11), an upper shell (12), printing paper (13), a rubber roller gear (14), a drive gear (15), and a printhead (16). The printhead (16) is rigidly connected to the printhead support (2) by screws. The printhead support (2) is elastically connected to the upper shell (12) by the spring (7) and the printhead limiting cap (6). The cam (4) is fixed on the lifting motor (5), and the surface of the cam (4) contacts the printhead limiting cap (6). The paper pressure roller (3) is fixed to the upper shell (12) by the pressure roller shaft (8). The roller gear (14) is fixed to one end of the roller (9), and the drive gear (15) is fixed to the drive motor (1), and the drive gear (15) meshes with the roller gear (14). The printing paper shaft (11) passes through the center of the printing paper (13) and is placed on the lower shell (10). The upper shell (12) and the lower shell (10) are connected by a shaft, and the open and closed states can be switched.

[0018] Working principle: When printing a blank area, the print head (16) does not need to work. At this time, the lifting motor (5) moves and drives the cam (4) to rotate in the forward direction. The cam (4) lifts the print head limit cap (6), so that the print head (16) rises and leaves the printing paper (13). When normal printing is required, the lifting motor (5) drives the cam (4) to rotate in the reverse direction, lowers the print head (16), and makes the print head (16) press back onto the printing paper (13) to perform printing.

[0019] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A mechanism having a function of elevating a print head, characterized by comprising: It includes drive motor (1), print head support (2), printing paper pressure wheel (3), cam (4), lifting motor (5), print head limit cap (6), spring (7), pressure wheel shaft (8), rubber roller (9), lower shell (10), printing paper shaft (11), upper shell (12), printing paper (13), rubber roller gear (14), drive gear (15), print head (16); The print head (16) is hard connected with the print head support (2) through screws; The print head support (2) is elastically connected on the upper shell (12) through the spring (7) and the print head limit cap (6); The cam (4) is fixed on the lifting motor (5), and the surface of the cam (4) is in contact with the print head limit cap (6); The printing paper pressure wheel (3) is fixed on the upper shell (12) through the pressure wheel shaft (8); The rubber roller gear (14) is fixed on one end of the rubber roller (9), the drive gear (15) is fixed on the drive motor (1), and the drive gear (15) is engaged with the rubber roller gear (14); The printing paper shaft (11) is placed on the lower shell (10) through the center of the printing paper (13); The upper shell (12) and the lower shell (10) are connected through the shaft, and the opening and closing state can be switched.

2. A mechanism having a lift printhead function according to claim 1, characterized in that: When the printer works, the drive motor (1) drives the rubber roller (9) to roll through the drive gear (15) and the rubber roller gear (14), the printing paper (13) is fed out under the action of the printing paper pressure wheel (3) and the rubber roller (9), and the print head (16) is pressed on the printing paper (13) under the action of the spring (7).

3. The mechanism having a function of lifting a print head according to claim 1, characterized in that: The surface of the cam (4) is in contact with the lower part of the print head limit cap (6), and the print head limit cap (6) can remain stationary or rise with the surface of the cam (4); At the same time, the print head limit cap (6) is hard connected with the print head support (2) through screws, and the print head (16) is fixed on the print head support (2), so that the rotation of the cam (4) can keep the print head (16) stationary or rising.

4. The mechanism having a function of lifting a print head according to claim 1, characterized by: When printing a blank area, the print head (16) does not need to work, at this time, the lifting motor (5) moves to drive the cam (4) to rotate forward, the cam (4) lifts the print head limit cap (6) to make the print head (16) rise and leave the printing paper (13); When normal printing is needed, the lifting motor (5) drives the cam (4) to rotate reversely to lower the print head (16), so that the print head (16) is pressed on the printing paper (13) to perform printing work.

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