CN219956854U - Chart diagram switching device for fingerprint module test - Google Patents
Chart diagram switching device for fingerprint module test Download PDFInfo
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- CN219956854U CN219956854U CN202321181228.6U CN202321181228U CN219956854U CN 219956854 U CN219956854 U CN 219956854U CN 202321181228 U CN202321181228 U CN 202321181228U CN 219956854 U CN219956854 U CN 219956854U
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- 238000012360 testing method Methods 0.000 title claims abstract description 35
- 238000010586 diagram Methods 0.000 title description 8
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- 230000001360 synchronised effect Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
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- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 3
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Abstract
The utility model provides a chart switching device for testing a fingerprint module, which relates to the technical field of fingerprint module testing equipment, and comprises a first guide rail, a chart jig and a driving assembly, wherein the first guide rail is arranged along an X-axis in an extending mode, the chart jig is connected with the first guide rail in a sliding mode, and the driving assembly is used for connecting and driving the chart jig to slide in a linear reciprocating mode along the first guide rail; the driving assembly comprises a stepping motor and a linkage structure, wherein the linkage structure is connected with an output shaft of the stepping motor and the chart jig, and the linkage structure is used for converting the rotation motion of the output shaft of the stepping motor into the linear reciprocating sliding motion of the chart jig along the first guide rail. The utility model adopts the stepping motor to drive instead of the traditional cylinder drive, the stepping motor has higher transmission precision compared with the cylinder, and on the basis, the linkage structure is adopted to convert the rotation motion of the output shaft of the stepping motor into the motion of the linear reciprocating motion of the chart jig, so that the position of the chart can be switched more accurately by driving the stepping motor.
Description
Technical Field
The utility model relates to the technical field of fingerprint module testing equipment, in particular to a chart switching device for fingerprint module testing.
Background
The fingerprint module is generally applied to equipment with an optical fingerprint identification function, such as a mobile phone, a tablet personal computer, a display screen and the like, and the equipment can realize an equipment unlocking function by combining the equipment with the fingerprint module.
In the process of producing the fingerprint module, the fingerprint module identification function is generally required to be tested, the fingerprint is required to be simulated by adopting a chart in the test process for fingerprint module identification, and according to the fingerprint module identification result, the existing fingerprint information is compared, so that whether the fingerprint module identification function meets the standard is analyzed. The chart is generally arranged on the driving device, and the driving device drives the chart to move to the testing position so as to be used for identifying the fingerprint module and testing the identification function of the fingerprint module. After the fingerprint module is tested, the driving device drives the chart to move away from the testing position.
At present, in order to reduce the use cost, a driving device adopted in the industry is generally an air cylinder driving mechanism, the air cylinder driving mechanism comprises a bracket, a guide rail and a linear telescopic air cylinder are arranged on the bracket, a chart is slidably connected to the guide rail through a sliding block, and the air cylinder drives the chart to linearly and reciprocally slide along the guide rail so as to switch the position of the chart, so that the chart is driven to a testing position or is moved away from the testing position.
However, the accuracy of switching the position of the chart by using the cylinder driving mechanism is low. On the one hand, when the cylinder drives the chart to move to the test position, the telescopic rod of the cylinder and the chart still slowly move under the action of respective inertia, so that the chart cannot be accurately positioned at the test position; on the other hand, the driving accuracy of the cylinder is greatly affected by the air pressure, and the driving accuracy of the cylinder is greatly reduced on the premise of insufficient air pressure. The position accuracy of the chart in the position switching process can be reduced due to the two reasons, so that the reject ratio of the follow-up fingerprint module grabbing chart is improved, and the fingerprint module testing accuracy is reduced.
For the above reasons, it is necessary to provide a fingerprint module testing technical scheme capable of improving the accuracy of the chart switching position.
Disclosure of Invention
The utility model provides a chart switching device for fingerprint module testing, which can improve the accuracy of chart switching positions.
The technical scheme adopted by the utility model is as follows:
a chart switching device for fingerprint module test comprises a first guide rail extending along an X axis, a chart jig slidingly connected with the first guide rail, and a driving assembly for connecting and driving the chart jig to linearly reciprocate along the first guide rail; the driving assembly comprises a stepping motor and a linkage structure, wherein the linkage structure is connected with an output shaft of the stepping motor and the chart jig, and the linkage structure is used for converting the rotation motion of the output shaft of the stepping motor into the linear reciprocating sliding motion of the chart jig along the first guide rail.
In one embodiment, the linkage structure includes a connecting rod, a slider, and a second guide rail; the second guide rail is connected with the bottom wall of the chart jig and extends along the Y axis; the sliding block is slidingly connected with the second guide rail; the rotation axis of the output shaft of the stepping motor is parallel to the Z axis; one end of the connecting rod can be connected with the output shaft of the stepping motor in a synchronous rotation way; the other end of the connecting rod is connected with the sliding block in a relatively rotatable way.
In one embodiment, one end of the connecting rod is provided with an assembly hole for inserting an output shaft of the stepping motor and a pin hole penetrating through the assembly hole along the radial direction of the assembly hole; a bolt is inserted into the pin hole; the bolt is abutted with the output shaft of the stepping motor.
In one embodiment, a circumferential side wall of an output shaft of the stepper motor includes at least one first planar wall; the first plane wall is provided with a coordination hole which is used for being in plug-in fit with the tail end of the bolt; the inner wall of the assembly hole comprises at least one second plane wall, and the first plane wall is abutted with the second plane wall.
In one embodiment, a circumferential side wall of an output shaft of the stepper motor includes at least one first planar wall; the connecting rod is provided with an assembly hole for the output shaft of the stepping motor to be inserted, and the inner wall of the assembly hole comprises at least one second plane wall; in the rotation process of the output shaft of the stepping motor, the second plane wall is abutted with the first plane wall, so that the connecting rod and the output shaft of the stepping motor synchronously rotate.
In one embodiment, the output shaft of the stepper motor is prismatic, and the first planar wall is formed by one of side walls of the output shaft of the stepper motor; the shape of the assembly hole is matched with the shape of the output shaft of the stepping motor; the second planar wall is constituted by one of the side walls of the fitting hole.
In one embodiment, the chart switching device for testing the fingerprint module further comprises a mounting bracket, the first guide rail is arranged at the upper part of the mounting bracket, and the stepper motor is arranged at the lower part of the mounting bracket; the chart jig is positioned above the stepping motor, and the linkage structure is positioned between the stepping motor and the chart jig.
In an embodiment, the mounting bracket is in the shape of a portal frame, the mounting bracket is provided with two limiting columns used for limiting the movement of the chart jig, and the two limiting columns are symmetrically arranged at two ends of the first guide rail.
In one embodiment, the output shaft drives the connecting rod to rotate forward, and the force applied by the connecting rod to the sliding block is decomposed into a thrust force pushing the sliding block to slide towards the end part of the second guide rail and a thrust force pushing the sliding block to move along the extending direction of the first guide rail.
The beneficial effects of the utility model are as follows:
the utility model adopts the stepping motor to drive instead of the traditional cylinder, the stepping motor has higher transmission precision compared with the cylinder, and on the basis, the linkage structure is adopted to convert the rotation motion of the output shaft of the stepping motor into the motion of the linear reciprocating motion of the chart jig.
Specifically, in the initial state, the initial position of the slider is located at the middle part of the second guide rail, and the initial position of the chart jig is located at one end of the first guide rail. When the output shaft of the stepping motor rotates in the forward direction (i.e. in the direction D in FIG. 2), the output shaft drives the connecting rod to rotate in the forward direction, and the force applied by the connecting rod to the sliding block can be decomposed into a thrust F1 pushing the sliding block to slide towards the end part of the second guide rail and a thrust F2 pushing the sliding block to move along the extending direction of the first guide rail; under the action of the thrust F1, the sliding block slides to the end part of the second guide rail, under the action of the thrust F2, the sliding block pushes the chart drawing jig to slide from one end of the first guide rail to the other end of the first guide rail, and when the chart drawing jig is positioned at the other end of the first guide rail, the chart drawing carried by the chart drawing jig is positioned at the test position, and the state of the chart drawing jig is shown in fig. 3. When the output shaft of the stepping motor reversely rotates, the connecting rod reversely rotates, and the sliding block and the chart jig also move back to the respective initial positions. According to the embodiment, the position of the chart can be switched accurately by driving the stepping motor in the mode, the defective rate of the grabbing chart of the fingerprint module is reduced, and the testing accuracy of the fingerprint module is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain the utility model. In the drawings of which there are shown,
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;
fig. 2 is a schematic diagram of the overall structure of the chart tool in the initial state according to the embodiment of the utility model;
FIG. 3 is a schematic diagram of the overall structure of the chart at the test position according to the embodiment of the utility model;
FIG. 4 is a schematic diagram of a combination structure of a stepper motor and a linkage according to an embodiment of the present utility model;
fig. 5 is a schematic diagram of a combination structure of an output shaft and an assembly hole of a stepper motor according to an embodiment of the present utility model.
Fig. 6 is a schematic diagram of a combination structure of an output shaft and an assembly hole of a stepper motor according to another embodiment of the utility model.
The drawings are marked with the following description:
10. a mounting bracket; 11. a limit column; 12. a mounting plate;
20. a chart jig;
30. a first guide rail;
40. a stepping motor; 41. an output shaft; 411. a first planar wall; 412. a coordination hole;
50. a linkage structure; 51. a connecting rod; 511. a second planar wall; 512. a fitting hole; 513. a pin hole; 52. a slide block; 53. a second guide rail;
60. a bolt.
Detailed Description
The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.
Referring to fig. 1 and 2, the present embodiment discloses a chart switching device for fingerprint module testing, which is mainly used for driving a chart switching position, and includes a mounting bracket 10, a first guide rail 30, a chart jig 20 and a driving assembly.
The mounting bracket 10 is in the shape of a portal frame. The first guide rail 30 is fixedly connected to the upper portion of the mounting bracket 10 by a fastener, and extends along the X axis.
The chart jig 20 is slidingly connected to the first guide rail 30. Specifically, the chart fixture 20 includes a base slidingly connected to the first guide rail 30 and a chart support fixedly connected to the base, and the chart support includes a square-frame-shaped bearing portion for bearing the chart. In other embodiments, the chart tool 20 may be a tool commonly used in industry for carrying chart.
The driving component is connected with the chart jig 20, and is used for driving the chart jig 20 to linearly and reciprocally slide along the first guide rail 30, so that the position of the chart jig 20 is switched, and the position of the chart is further switched. The driving assembly comprises a stepping motor 40 and a linkage structure 50, wherein the linkage structure 50 connects the stepping motor 40 and the chart jig 20. The stepping motor 40 is provided at the lower portion of the mounting bracket 10. Specifically, the stepper motor 40 is fixedly connected between two legs of the mounting bracket 10 through a mounting plate 12, and is located below the chart fixture 20. The linkage structure 50 is located between the chart jig 20 and the stepper motor 40, and the linkage structure 50 connects the output shaft 41 of the stepper motor 40 and the chart jig 20 to convert the rotation motion of the output shaft 41 of the stepper motor 40 into the linear reciprocating sliding motion of the chart jig 20 along the first guide rail 30.
It should be understood that the foregoing solution is merely to illustrate the positional relationship among the mounting bracket 10, the first guide rail 30, the chart jig 20 and the driving assembly in the present embodiment, and the solution in the present embodiment has the advantage of compact structure. Of course, in other embodiments, the positional relationship of the mounting bracket 10, the first guide rail 30, the chart tool 20, and the driving assembly may be changed in other manners without considering the compactness, so long as it can ensure that the driving assembly can drive the chart to reciprocate along the first guide rail 30.
Compared with the prior art, the embodiment adopts the stepping motor 40 to drive to replace the traditional cylinder to drive, the stepping motor 40 has higher transmission precision compared with the cylinder, on the basis, the linkage structure 50 is adopted to convert the rotation motion of the output shaft 41 of the stepping motor 40 into the motion of the linear reciprocating motion of the chart jig 20, so that the stepping motor 40 can drive the chart to switch the positions more accurately, the reject ratio of the fingerprint module to grasp the chart is reduced, and the fingerprint module testing precision is improved.
The scheme of this embodiment will be further explained.
In this embodiment, as shown in fig. 2, the mounting bracket 10 is provided with two limiting posts 11 for limiting the moving stroke of the chart jig 20, and the two limiting posts 11 are symmetrically disposed at two ends of the first guide rail 30. Specifically, the limiting posts 11 may contact with the base of the chart tool 20, so as to limit the chart tool 20 to move along the first guide rail 30, and finally limit the moving range of the chart tool 20 between the two limiting posts 11.
In the present embodiment, the linkage structure 50 includes a link 51, a slider 52, and a second rail 53. The second guide rail 53 is fixedly connected to the bottom wall of the chart fixture 20 through a fastener, and extends along the Y axis. The slider 52 is slidably connected to the second rail 53, and the slider 52 can reciprocally slide along the second rail 53. The output shaft 41 of the stepping motor 40 faces the chart jig 20. The rotation axis of the output shaft 41 of the stepping motor 40 is parallel to the Z axis. One end of the link 51 is rotatably connected to the output shaft 41 of the stepping motor 40 in synchronization with the output shaft 41 of the stepping motor 40, and the other end of the link 51 is rotatably connected to the slider 52 via a rotation shaft.
When the stepping motor 40 is in operation, the stepping motor 40 is electrified to run, the output shaft 41 of the stepping motor 40 rotates, and the output shaft 41 of the stepping motor 40 rotates positively and negatively, so that the output shaft 41 drives the connecting rod 51 to rotate positively and negatively around the output shaft 41 of the stepping motor 40, and in fact, the output shaft 41 drives the connecting rod 51 to rotate positively and negatively by taking the output shaft 41 as a rotation center point; when the connecting rod 51 rotates, the sliding block 52 is driven to move along the second guide rail 53, in this process, in order to adapt to the rotating action of the connecting rod 51, the sliding block 52 forces the second guide rail 53 to move adaptively together with the chart jig 20, and meanwhile, under the limitation of the first guide rail 30, the chart jig 20 can only slide linearly along the first guide rail 30. In the foregoing manner, the stepper motor 40 can drive the chart tool 20 to linearly reciprocate along the first guide rail 30 through the linkage structure 50.
For example, in an operation scenario, as shown in fig. 2, in an initial state, the initial position of the slider 52 is located at the middle portion of the second rail 53, and the initial position of the chart tool 20 is located at one end of the first rail 30. When the output shaft 41 of the stepper motor 40 rotates in the forward direction (i.e., direction D in fig. 2), the output shaft 41 drives the link 51 to rotate in the forward direction, and the force applied by the link 51 to the slider 52 can be decomposed into a thrust F1 pushing the slider 52 to slide toward the end of the second guide rail 53 and a thrust F2 pushing the slider 52 to move along the extending direction of the first guide rail 30; under the action of the thrust force F1, the sliding block 52 slides to the end of the second guide rail 53, under the action of the thrust force F2, the sliding block 52 pushes the chart tool 20 to slide from one end of the first guide rail 30 to the other end of the first guide rail 30, and when the chart tool 20 is located at the other end of the first guide rail 30, the chart carried by the chart tool is located at the testing position, and the state of the chart tool is shown in fig. 3. When the output shaft 41 of the stepper motor 40 rotates in the opposite direction, the link 51 rotates in the opposite direction, and the slider 52 and the chart jig 20 also move back to their respective initial positions. In this embodiment, the position of the chart fixture 20 is switched by the above-mentioned method, and then the position of the chart is switched, so that the chart is moved to or from the testing position.
In the present embodiment, the connection scheme of the link 51 and the output shaft 41 of the stepping motor 40 is as follows:
referring to fig. 4 and 5, one end of the link 51 is provided with an assembly hole 512 into which the output shaft 41 of the stepping motor 40 is inserted and a pin hole 513. The pin hole 513 penetrates the fitting hole 512 and the outside in the radial direction of the fitting hole 512. The pin hole 513 is inserted with a plug 60. The pin 60 is inserted into the pin hole 513 from the outer end of the pin hole 513, the tail end of the pin 60 enters the assembly hole 512 and is abutted against the side wall of the output shaft 41 of the stepper motor 40, so that friction force is generated between the pin 60 and the side wall of the output shaft 41 of the stepper motor 40, the output shaft 41 of the stepper motor 40 and the pin 60 can be prevented from sliding relatively to a certain extent by the friction force, synchronous rotation of the output shaft 41 of the stepper motor 40 and the pin 60 is achieved, and synchronous rotation of the output shaft 41 of the stepper motor 40 and the connecting rod 51 is achieved.
The bolt 60 may be a screw member, and the pin hole 513 may be a screw hole, so that the bolt 60 may be screwed into the pin hole 513 or removed from the pin hole 513, thereby locking the bolt 60 in the pin hole 513 and preventing the bolt 60 from falling off to some extent. In other embodiments, the latch 60 may be a cylindrical rod.
In this embodiment, the circumferential side wall of the output shaft 41 of the stepper motor 40 includes at least one first planar wall 411, and preferably, the first planar wall 411 is disposed to extend along the length direction of the output shaft 41 of the stepper motor 40, and compared to the contact between the latch 60 and the circumferential side wall of the output shaft 41, the contact between the latch 60 and the first planar wall 411 in this embodiment can increase the contact area between the latch 60 and the output shaft 41 of the stepper motor 40, thereby increasing the friction between the latch 60 and the output shaft 41 of the stepper motor 40.
Further, the first planar wall 411 is provided with a coordination hole 412. The inner wall of the fitting hole 512 includes at least one second planar wall 511, and the pin hole 513 penetrates the second planar wall 511. When the plug 60 is assembled, the plug 60 is inserted through the pin hole 513 and the tip thereof is inserted into the coordination hole 412. In the rotation process of the output shaft 41 of the stepper motor 40, the second planar wall 511 is abutted against the first planar wall 411, and the tail end of the plug pin 60 is clamped with the coordination hole 412 of the output shaft 41, so that the connecting rod 51 and the output shaft 41 of the stepper motor 40 can rotate more stably and synchronously, the connecting rod 51 and the output shaft 41 cannot be connected and rocked, and stability is guaranteed.
In other embodiments, as shown in fig. 6, the circumferential side wall of the output shaft 41 of the stepper motor 40 includes at least one first planar wall 411; the connecting rod 51 is provided with an assembly hole 512 for inserting the output shaft 41 of the stepping motor 40, and the inner wall of the assembly hole 512 comprises at least one second plane wall 511; during rotation of the output shaft 41 of the stepper motor 40, the second planar wall 511 abuts the first planar wall 411 and is in parallel relationship such that the link 51 rotates in synchronism with the output shaft 41 of the stepper motor 40.
In other embodiments (not shown), the output shaft 41 of the stepper motor 40 is prismatic, and the first planar wall 411 is formed by one of the side walls of the output shaft 41 of the stepper motor 40. The shape of the fitting hole 512 is adapted to the shape of the output shaft 41 of the stepping motor 40; the second planar wall 511 is constituted by one of the side walls of the fitting hole 512.
Any combination of the various embodiments of the utility model should be considered as being within the scope of the present disclosure, as long as the inventive concept is not violated; within the scope of the technical idea of the utility model, any combination of various simple modifications and different embodiments of the technical proposal without departing from the inventive idea of the utility model should be within the scope of the utility model.
Claims (9)
1. A chart switching device for fingerprint module testing comprises a first guide rail (30) extending along an X axis, a chart jig (20) slidingly connected with the first guide rail (30), and a driving assembly for connecting and driving the chart jig (20) to linearly and reciprocally slide along the first guide rail (30); the method is characterized in that:
the driving assembly comprises a stepping motor (40) and a linkage structure (50), wherein the linkage structure (50) is connected with an output shaft (41) of the stepping motor (40) and the chart jig (20), and the linkage structure (50) is used for converting the rotation motion of the output shaft (41) of the stepping motor (40) into the linear reciprocating sliding motion of the chart jig (20) along the first guide rail (30).
2. The chart switching device for fingerprint module testing according to claim 1, wherein the linkage structure (50) comprises a connecting rod (51), a slider (52) and a second guide rail (53); the second guide rail (53) is connected with the bottom wall of the chart jig (20) and extends along the Y axis; the sliding block (52) is slidingly connected with the second guide rail (53); the rotation axis of an output shaft (41) of the stepping motor (40) is parallel to the Z axis; one end of the connecting rod (51) and an output shaft (41) of the stepping motor (40) are connected to the output shaft (41) of the stepping motor (40) in a synchronous rotation manner; the other end of the connecting rod (51) is connected with the sliding block (52) in a relatively rotatable manner.
3. The chart switching device for fingerprint module testing according to claim 2, wherein one end of the connecting rod (51) is provided with an assembly hole (512) for inserting the output shaft (41) of the stepper motor (40) and a pin hole (513) penetrating the assembly hole (512) along the radial direction of the assembly hole (512); a bolt (60) is inserted into the pin hole (513); the plug pin (60) is in contact with an output shaft (41) of the stepping motor (40).
4. A chart switching device for fingerprint module testing according to claim 3, characterized in that the circumferential side wall of the output shaft (41) of the stepper motor (40) comprises at least one first planar wall (411), the first planar wall (411) being provided with a coordination hole (412) for mating with the end of the plug pin (60); the inner wall of the assembly hole (512) comprises at least one second planar wall (511), and the first planar wall (411) is abutted with the second planar wall (511).
5. The chart switching device for fingerprint module testing according to claim 2, wherein the circumferential side wall of the output shaft (41) of the stepper motor (40) comprises at least one first planar wall (411); the connecting rod (51) is provided with an assembly hole (512) for inserting an output shaft (41) of the stepping motor (40), and the inner wall of the assembly hole (512) comprises at least one second plane wall (511); during rotation of the output shaft (41) of the stepper motor (40), the second planar wall (511) abuts against the first planar wall (411) to enable the connecting rod (51) to rotate synchronously with the output shaft (41) of the stepper motor (40).
6. The chart switching device for fingerprint module testing according to claim 5, wherein the output shaft (41) of the stepper motor (40) is prismatic, and the first planar wall (411) is formed by one of side walls of the output shaft (41) of the stepper motor (40); the shape of the assembly hole is matched with the shape of an output shaft (41) of the stepping motor (40); the second planar wall (511) is constituted by one of the side walls of the fitting hole.
7. The chart switching device for fingerprint module testing according to claim 1, further comprising a mounting bracket (10), wherein the first guide rail (30) is provided at an upper portion of the mounting bracket (10), and the stepping motor (40) is provided at a lower portion of the mounting bracket (10); the chart jig (20) is located above the stepping motor (40), and the linkage structure (50) is located between the stepping motor (40) and the chart jig (20).
8. The chart switching device for fingerprint module testing according to claim 7, wherein the mounting bracket (10) is in a portal frame shape, the mounting bracket (10) is provided with two limiting posts (11) for limiting the movement of the chart jig (20), and the two limiting posts (11) are symmetrically arranged at two ends of the first guide rail (30).
9. The chart switching device for fingerprint module testing according to claim 2, wherein the output shaft (41) drives the connecting rod (51) to rotate forward, and the force applied by the connecting rod (51) to the slider (52) is decomposed into a thrust force pushing the slider (52) to slide toward the end of the second guide rail 53 and a thrust force pushing the slider (52) to move along the extending direction of the first guide rail 30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321181228.6U CN219956854U (en) | 2023-05-16 | 2023-05-16 | Chart diagram switching device for fingerprint module test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321181228.6U CN219956854U (en) | 2023-05-16 | 2023-05-16 | Chart diagram switching device for fingerprint module test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219956854U true CN219956854U (en) | 2023-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321181228.6U Active CN219956854U (en) | 2023-05-16 | 2023-05-16 | Chart diagram switching device for fingerprint module test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219956854U (en) |
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2023
- 2023-05-16 CN CN202321181228.6U patent/CN219956854U/en active Active
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