CN220681974U - Thermal print head lifting and pressing mechanism and medical printer - Google Patents
Thermal print head lifting and pressing mechanism and medical printer Download PDFInfo
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- CN220681974U CN220681974U CN202322432983.3U CN202322432983U CN220681974U CN 220681974 U CN220681974 U CN 220681974U CN 202322432983 U CN202322432983 U CN 202322432983U CN 220681974 U CN220681974 U CN 220681974U
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- lifting
- pressing
- cam
- rotating shaft
- print head
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- 238000003825 pressing Methods 0.000 title claims abstract description 81
- 238000007639 printing Methods 0.000 claims abstract description 45
- 230000006698 induction Effects 0.000 claims description 3
- 238000007651 thermal printing Methods 0.000 abstract description 6
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- 208000010727 head pressing Diseases 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The application discloses thermal print head lifting hold-down mechanism and medical printer, thermal print head lifting hold-down mechanism includes: a print head, a spindle; the printing head is connected with a pressing sheet and a lifting sheet; the rotating shaft is rotatably arranged between the pressing piece and the lifting piece; the rotating shaft is provided with a compression cam and a lifting cam; the rotating shaft is used for pushing down the pressing piece through the pressing cam when rotating to a first preset angle so as to drive the printing head to push down; the rotating shaft is also used for jacking the lifting piece through the lifting cam to drive the printing head to ascend when rotating to a second preset angle. According to the scheme, the pressing cam and the lifting cam are driven to rotate through the rotating shaft, the pressing cam can be used for driving the printing head to press downwards when a film is printed, the lifting cam can be used for driving the printing head to lift when printing is not needed, so that the printing head is not required to be kept in a pressing state, long-term stress deformation of the pressing plate or the lifting plate is avoided, and the problem that the pressing plate is easy to deform when being used for a long time in the existing thermal printing head pressing mechanism is effectively solved.
Description
Technical Field
The application relates to the technical field of medical printers, in particular to a thermal printing head lifting and pressing mechanism and a medical printer.
Background
A thermal print head hold-down mechanism is provided in the film printer to hold down the thermal print head during printing. In the existing thermal printing head pressing mechanism, a spring structure of the thermal printing head is generally pressed by a pressing plate; because the pressure is kept continuously when the printing head is pressed, the pressing plate is easy to deform after long-term use, so that the pressure of the thermal printing head is reduced or the left pressure and the right pressure are unbalanced, and the printing quality of the film is affected.
Disclosure of Invention
In view of this, the purpose of this application is to provide a thermal print head lifting hold-down mechanism and medical printer for solve current thermal print head hold-down mechanism and need keep the pressure of clamp plate and lead to the clamp plate to use the problem of being out of shape easily for a long time.
To achieve the above technical object, a first aspect of the present application provides a thermal printhead lifting and pressing mechanism, including: a print head, a spindle;
the printing head is connected with a pressing sheet and a lifting sheet;
the rotating shaft is rotatably arranged between the pressing piece and the lifting piece;
the rotating shaft is provided with a compression cam and a lifting cam;
the rotating shaft is used for pushing down the pressing piece through the pressing cam when rotating to a first preset angle so as to drive the printing head to push down;
and the rotating shaft is also used for jacking the lifting piece through the lifting cam to drive the printing head to ascend when rotating to a second preset angle.
Further, the pressing cam and the lifting cam are aligned along the axial direction of the rotating shaft.
Further, the first preset angle is 180 degrees;
the second preset angle is 0 degrees.
Further, the pressing cam and the lifting cam on the rotating shaft comprise a plurality of pressing cams and are symmetrically arranged relative to the printing head.
Further, the lifting sheet comprises a plurality of lifting sheets and is symmetrically arranged about the printing head;
the compressing sheet is a whole sheet.
Further, the device also comprises an inductor and a controller;
the sensor is used for sensing whether a film exists below the printing head;
the controller is electrically connected with the inductor and the rotating shaft and is used for controlling the rotating shaft to rotate according to the induction result of the inductor.
Further, the device also comprises a connecting plate;
the lifting piece is arranged on the connecting plate;
the printing head is connected with the connecting plate through an elastic piece.
Further, the elastic piece is a spring screw.
Further, the compressing sheet is fixedly connected with the lifting sheet.
A second aspect of the present application provides a medical printer comprising a thermal printhead lifting and pressing mechanism as described in any one of the preceding claims.
From above technical scheme, this application provides a thermal print head lifting hold-down mechanism and medical printer, and thermal print head lifting hold-down mechanism includes: a print head, a spindle; the printing head is connected with a pressing sheet and a lifting sheet; the rotating shaft is rotatably arranged between the pressing piece and the lifting piece; the rotating shaft is provided with a compression cam and a lifting cam; the rotating shaft is used for pushing down the pressing piece through the pressing cam when rotating to a first preset angle so as to drive the printing head to push down; and the rotating shaft is also used for jacking the lifting piece through the lifting cam to drive the printing head to ascend when rotating to a second preset angle.
According to the scheme, the pressing cam and the lifting cam are driven to rotate through the rotating shaft, the pressing cam can be used for driving the printing head to press downwards when a film is printed, the lifting cam can be used for driving the printing head to lift when printing is not needed, so that the printing head is not required to be kept in a pressing state, long-term stress deformation of the pressing sheet or the lifting sheet is avoided, and the problem that the pressing plate is easy to deform when the pressing mechanism of the traditional thermal printing head needs to continuously keep the pressure of the pressing plate is effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic diagram of an overall structure of a thermal printhead lifting and pressing mechanism according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present application based on the embodiments described herein.
In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, interchangeably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the terms in the embodiments of the present application may be understood by those of ordinary skill in the art in a specific context.
Referring to fig. 1, a first aspect of an embodiment of the present application provides a thermal printhead lifting and pressing mechanism, including: a printing head 1 and a rotating shaft 2. The printing head 1 is connected with a compressing sheet 11 and a lifting sheet 12; the rotating shaft 2 is rotatably arranged between the compressing sheet 11 and the lifting sheet 12; the rotating shaft 2 is provided with a pressing cam 21 and a lifting cam 22; the rotating shaft 2 is used for driving the printing head 1 to press down by pressing down the pressing sheet 11 through the pressing cam 21 when rotating to a first preset angle; the rotating shaft 2 is further used for pushing up the lifting piece 12 through the lifting cam 22 to drive the printing head 1 to ascend when rotating to a second preset angle.
The printhead 1 may be provided on a printer. When a film is required to be printed, the rotating shaft 2 drives the pressing cam 21 to rotate, and the pressing cam 21 gradually pushes the pressing sheet 11 to press down in the process of rotating and abutting the pressing sheet 11, so that the printing head 1 is driven to press down; when the rotating shaft 2 rotates to a first preset angle, the pressing cam 21 presses the pressing piece 11 to a preset state, and presses the printing head 1 onto the film.
After the film is printed, the rotating shaft 2 drives the lifting cam 22 to lift, and the lifting cam 22 gradually drives the lifting sheet 12 to move upwards in the process of being in transmission contact with the lifting sheet 12, so that the printing head 1 is driven to be far away from the film, and then the film flows out in a rotating way on the rubber roller. Correspondingly, when printing is not needed, the print head 1 can be lifted by the lifting cam 22, so that the hold-down piece 11 is prevented from being stressed for a long time.
In a more specific embodiment, the pressing cam 21 and the lifting cam 22 are aligned along the axial direction of the rotating shaft 2, that is, in this embodiment, the pressing cam 21 and the lifting cam 22 are located on the same side of the rotating shaft 2, so that the rotating shaft 2 is manufactured in the production process.
As one embodiment, when the rotation shaft 2 is rotated, the pressing cam 21 and the lifting cam 22 are simultaneously rotated to simultaneously push the pressing piece 11 or the lifting piece 12.
As another embodiment, the pressing cam 21 and the lifting cam 22 may be the same component.
In the embodiment provided in the application, the pressing piece 11 and the lifting piece 12 may be staggered along the axial direction of the rotating shaft 2.
In application, the first preset angle is 180 °; the second preset angle is 0 degrees; in the initial state, the printhead 1 is in a raised state, and the rotation shaft 2 is maintained at a second preset angle.
Specifically, the pressing piece 11 and the lifting piece 12 are both flat plates, and are respectively arranged at the top and the bottom of the side part of the pressing head.
As a further improvement, the pressing cam 21 and the lifting cam 22 on the rotation shaft 2 may each include a plurality and be symmetrically disposed with respect to the print head 1.
By providing a plurality of pressing cams 21 and lifting cams 22, a multipoint force can be provided when abutting the pressing piece 11 or the lifting piece 12. Meanwhile, the axial direction of the rotating shaft 2 is the length direction of the printing head 1; for this reason, the symmetrical arrangement of the pressing cam 21 and the lifting cam 22 with respect to the print head 1 in this embodiment contributes to the uniformity of the force applied to both sides of the print head 1 when pressing a film, thereby improving the printing effect.
In one embodiment, the lift tab 12 includes a plurality and is symmetrically disposed about the printhead 1; the pressing piece 11 is a whole piece.
The plurality of lifting pieces 12 are arranged in one-to-one correspondence with the plurality of lifting cams 22; the setting of the compressing sheet 11 in this embodiment is a monolithic type, so that the compressing sheet 11 drives the whole printhead 1 to press down on one hand, and on the other hand, the compressing cam 21 and the lifting cam 22 can both provide a pressing force for the compressing sheet 11 when rotating to a first preset angle of 180 °.
In another embodiment, the device further comprises an inductor and a controller; the sensor is used for sensing whether the film exists below the printing head 1; the controller is electrically connected with the inductor and the rotating shaft 2 and is used for controlling the rotating shaft 2 to rotate according to the induction result of the inductor.
Specifically, in the present embodiment, the rotation of the rotation shaft 2 is controlled by a controller, wherein the controller can control the rotation shaft 2 by a motor. When the sensor senses that a film exists below the printing head 1, the controller controls the rotating shaft 2 to rotate to a first preset angle; when the film is printed or no film is located below the printing head 1, the controller controls the rotating shaft 2 to rotate to a second preset angle. The film printing may be judged by the controller controlling the rotation shaft 2 to rotate to a first preset angle and then keeping the preset time, and the film printing is considered to be finished after the preset time is kept.
Further, a connecting plate 13 is also included; the lifting sheet 12 is arranged on the connecting plate 13; the print head 1 is connected to the connection plate 13 by an elastic member 14.
By the elastic member 14, the printhead 1 can be raised by the elastic force of the elastic member 14 when the pressing cam 21 is separated from the pressing piece 11. The elastic member 14 may be a spring screw, which is connected to the print head 1 through the connection plate 13.
Further, the pressing piece 11 and the lifting piece 12 are fixedly connected.
A second aspect of the present application provides a medical printer comprising a thermal printhead lifting and pressing mechanism of any of the above.
While the present utility model has been described in detail with reference to the examples, it will be apparent to those skilled in the art that the foregoing examples can be modified or equivalents substituted for some of the features thereof, and any modifications, equivalents, improvements and substitutions made therein are intended to be within the spirit and principles of the present utility model.
Claims (10)
1. A thermal printhead lift hold-down mechanism, comprising: a printing head (1) and a rotating shaft (2);
the printing head (1) is connected with a pressing sheet (11) and a lifting sheet (12);
the rotating shaft (2) is rotatably arranged between the pressing piece (11) and the lifting piece (12);
a pressing cam (21) and a lifting cam (22) are arranged on the rotating shaft (2);
the rotating shaft (2) is used for pushing down the pressing piece (11) through the pressing cam (21) to drive the printing head (1) to push down when rotating to a first preset angle;
and the rotating shaft (2) is also used for jacking the lifting sheet (12) through the lifting cam (22) to drive the printing head (1) to ascend when rotating to a second preset angle.
2. Thermal print head lifting and pressing mechanism according to claim 1, characterized in that the pressing cam (21) and lifting cam (22) are arranged in alignment along the axial direction of the rotary shaft (2).
3. The thermal print head lifting and pressing mechanism of claim 2, wherein the first predetermined angle is 180 °;
the second preset angle is 0 degrees.
4. Thermal print head lifting and pressing mechanism according to claim 2, characterized in that the pressing cam (21) and lifting cam (22) on the spindle (2) each comprise a plurality and are arranged symmetrically with respect to the print head (1).
5. The thermal print head lifting and pressing mechanism according to claim 4, characterized in that the lifting sheet (12) comprises a plurality and is symmetrically arranged with respect to the print head (1);
the compressing sheet (11) is a whole sheet.
6. The thermal printhead lift hold down mechanism of claim 1, further comprising an inductor and a controller;
the sensor is used for sensing whether a film exists below the printing head (1);
the controller is electrically connected with the inductor and the rotating shaft (2) and is used for controlling the rotating shaft (2) to rotate according to the induction result of the inductor.
7. The thermal print head lifting and pressing mechanism according to claim 1, further comprising a connecting plate (13);
the lifting piece (12) is arranged on the connecting plate (13);
the printing head (1) is connected with the connecting plate (13) through an elastic piece (14).
8. Thermal print head lifting and pressing mechanism according to claim 7, characterized in that the elastic element (14) is a spring screw.
9. The thermal print head lifting and pressing mechanism according to claim 7, wherein the pressing piece (11) and the lifting piece (12) are fixedly connected.
10. A medical printer comprising a thermal print head lifting and pressing mechanism according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322432983.3U CN220681974U (en) | 2023-09-06 | 2023-09-06 | Thermal print head lifting and pressing mechanism and medical printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322432983.3U CN220681974U (en) | 2023-09-06 | 2023-09-06 | Thermal print head lifting and pressing mechanism and medical printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220681974U true CN220681974U (en) | 2024-03-29 |
Family
ID=90406259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322432983.3U Active CN220681974U (en) | 2023-09-06 | 2023-09-06 | Thermal print head lifting and pressing mechanism and medical printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220681974U (en) |
-
2023
- 2023-09-06 CN CN202322432983.3U patent/CN220681974U/en active Active
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