CN219757139U - Universal floating mechanism of thread detection equipment - Google Patents
Universal floating mechanism of thread detection equipment Download PDFInfo
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- CN219757139U CN219757139U CN202320917457.3U CN202320917457U CN219757139U CN 219757139 U CN219757139 U CN 219757139U CN 202320917457 U CN202320917457 U CN 202320917457U CN 219757139 U CN219757139 U CN 219757139U
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- 238000007667 floating Methods 0.000 title claims abstract description 69
- 238000001514 detection method Methods 0.000 title claims abstract description 66
- 238000009434 installation Methods 0.000 claims description 39
- 238000012360 testing method Methods 0.000 claims description 10
- 238000007689 inspection Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 208000004350 Strabismus Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model discloses a universal floating mechanism of a thread detection device, which comprises a mounting main body, an elastic component, a universal connector and a detection measuring tool connecting piece, wherein the elastic component is arranged in the mounting main body; the universal connector extrudes the elastic component to obtain a floating space so as to realize axial floating. The elastic component provides elastic floating force to enable the detection measuring tool to slow down the impact force when the detection measuring tool is screwed into the to-be-detected piece and is in contact with the to-be-detected piece, and the universal connector enables the detection measuring tool to obtain universal rotation performance, so that radial floating is achieved.
Description
Technical Field
The utility model relates to the field of thread detection, in particular to a universal floating mechanism of thread detection equipment.
Background
The threads include internal threads and external threads, such as external threads provided on a bolt, internal threads provided within a nut. The thread detection is required after the production of the threaded piece, and particularly in some industries with high requirements on product processing precision, such as the military industry, each product is required to be detected for the thread of a product port so as to ensure that the sold threaded piece can be normally used. A thread detection gauge, such as a thread go gauge or a no-go gauge, is generally used, and for internal threads in a threaded hole, the thread detection is performed by screwing the detection gauge into the threaded hole during detection. With the development of technology, the previous detection mode of manual thread detection measuring tools is gradually replaced by automatic thread detection equipment. In the patent number CN202222523607.0 entitled thread detection power head, the detection stud can be driven to rotate by the mutual coordination of the motor, the speed reducer, the rotating shaft, the rotating cylinder, the rotating head and the torque clutch, so that the detection stud can be screwed into the threaded hole of a product to be detected, and further automatic detection of the threaded hole is realized.
Because the detection head and the product to be detected are hard products and need to be mutually touched, the rigid screwing action can damage the detection head and the product to be detected, so that a floating device is arranged on the thread detection head to form a floating detection mechanism, and the floating detection mechanism has an elastic buffering function when the detection measuring tool is touched with the product to be detected, for example, the application number is CN202211285552.2, and the utility model patent application of the aluminum alloy wheel thread detection device discloses that a spring is arranged between the upper end of a sliding shaft and a main shaft to realize a floating function.
In the detection, it is necessary to ensure that the product to be detected is located directly below the detection head. However, in automatic screw thread check out test set, the product (for example nut) that waits to detect is carried out the pay-off by vibration dish usually, will wait to detect the product centre gripping by the manipulator again and to detect on the testing platform, because the precision deviation, it is possible that the product that waits to detect in this process is slightly inclined or the position slightly squints to lead to putting on the testing platform and wait to detect the product position misalignment, the screw hole that produces on waiting to detect the product has the condition that contained angle etc. are unfavorable for detecting with the measuring tool, the detection product card appears on the measuring tool when the measuring tool precession detects, influence the testing result, can block the material shut down when serious, influence detection efficiency.
Disclosure of Invention
The utility model mainly aims to provide a universal floating mechanism of a thread detection device, which aims to solve the problems and improve the detection efficiency.
The utility model provides a universal floating mechanism of a thread detection device, which comprises a mounting main body, an elastic component, a universal connector and a detection measuring tool connecting piece, wherein the elastic component is arranged in the mounting main body; the universal connector extrudes the elastic component to obtain a floating space so as to realize axial floating.
The movable part of the universal connector comprises a righting platform facing the floating direction, a limiting part opposite to the righting platform in the floating direction is arranged in the installation main body, a movable space for the movable part to rotate is reserved between the righting platform and the limiting part in a natural state, when the universal connector is pushed to extrude the elastic component, the righting platform moves towards the limiting part, and when the righting platform moves to the limiting part, the limiting part acts on the righting platform to limit the universal connector to continue pushing towards the elastic component, and the righting platform is positioned at a horizontal position, so that the movable part is automatically righted.
Preferably, the universal connector comprises a sphere fixing piece, a self-centering sphere rotatably mounted on the sphere fixing piece and a universal movable main body connected with the self-centering sphere, wherein the sphere fixing piece is slidably mounted in the mounting main body, one end far away from the self-centering sphere is propped against the end part of the elastic component in the elastic expansion direction, and the universal movable main body extends out of the mounting main body and is connected with the detection measuring tool connecting piece.
Preferably, the elastic component comprises an elastic adjusting screw and a spring, the elastic adjusting screw is assembled in the installation main body through threads, the spring is extruded between the elastic adjusting screw and the ball fixing piece, and the elastic force of the spring is adjusted through adjusting the position of the elastic adjusting screw through threads.
Preferably, the elastic component further comprises a sealing ring, the sealing ring is embedded at the periphery of the head of the elastic adjusting screw, and when the elastic adjusting screw is assembled in the installation main body, the outer wall of the sealing ring is tightly attached to the inner wall of the installation main body.
Preferably, one end of the sphere fixing piece far away from the self-centering sphere is protruded to form a spring positioning head, and the spring is sleeved on the spring positioning head.
Preferably, the universal movable body comprises a sphere connecting part used for being connected with the self-centering sphere and a measuring tool connecting part used for being connected with the detecting measuring tool connecting piece, the righting platform is a righting shoulder which is arranged between the sphere connecting part and the measuring tool connecting part and protrudes towards the radial periphery, and the righting shoulder protrudes out of the sphere connecting part and the measuring tool connecting part in the radial direction;
the installation main body comprises an elastic floating installation position and a universal adjusting installation position which is connected below the elastic floating installation position and has a radial size larger than that of the elastic floating installation position, the elastic assembly and the ball fixing piece are installed in the elastic floating installation position, the positive shoulder is located in the universal adjusting installation position, the measuring tool connecting part extends out of the universal adjusting installation position, and the limiting part is a limiting pin.
Preferably, a washer for supporting the positive shoulder is arranged at a position below the positive shoulder in the universal adjustment installation position, and the outer edge of the positive shoulder protrudes out of the washer.
Preferably, two limit pins are arranged and are positioned above two opposite sides of the positive shoulder; the port of the universal adjusting installation position, from which the measuring tool connecting part extends, is horn-shaped.
Preferably, a sliding groove matched with the sphere fixing piece is arranged in the elastic floating installation position, and the self-centering sphere extends out from one end of the sliding groove, which faces the universal adjustment installation position.
Preferably, the measuring tool connecting piece comprises an elastic chuck and an elastic chuck nut sleeved outside the elastic chuck, one end of the universal connector connected with the measuring tool connecting piece is provided with an elastic chuck hole matched with the elastic chuck, the outer wall of the elastic chuck hole is provided with threads matched with the elastic chuck nut, the elastic chuck is in a horn shape, the inner wall of the elastic chuck hole is in a horn shape matched with the elastic chuck, and the elastic chuck is installed in the elastic chuck hole and locked on the outer wall of the elastic chuck hole through the elastic chuck nut, so that the elastic chuck clamps the measuring tool.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides a universal floating mechanism of a thread detection device, which comprises a mounting main body, an elastic component, a universal connector and a detection measuring tool connecting piece, wherein the elastic component is arranged in the mounting main body; the universal connector extrudes the elastic component to obtain a floating space so as to realize axial floating. The elastic component provides elastic floating force to enable the detection measuring tool to slow down the impact force when the detection measuring tool is screwed into the to-be-detected piece and is in contact with the to-be-detected piece, and the universal connector enables the detection measuring tool to obtain universal rotation performance, so that radial floating is achieved.
The movable part of the universal connector comprises a righting platform facing the floating direction, a limiting part opposite to the righting platform in the floating direction is arranged in the installation main body, and a movable space for the movable part to rotate is reserved between the righting platform and the limiting part in a natural state; when detecting, the whole promotion of universal floating mechanism to waiting to detect the product direction, when detecting the measuring tool and waiting to detect the product contact, reaction makes the whole promotion to the elastic component direction of measuring tool, measuring tool connecting piece and universal connector, drive the position platform and remove to spacing portion direction, when position platform removes to spacing portion, spacing portion resists on the position platform in order to restrict measuring tool, measuring tool connecting piece and universal connector and continues to promote to the elastic component direction, when the movable part of like universal connector inclines, can make the position platform resume horizontal position under the effect of spacing portion, realize the automatic position of moving part, thereby realize detecting the automatic position of measuring tool connecting piece and measuring tool.
Thereby in the position of waiting to detect the piece timing (produce the screw hole on waiting to detect the product and detect measuring tool different axle, the screw hole on waiting to detect the product has the contained angle with the measuring tool), the measuring tool can obtain corresponding inclination through universal connector's movable part rotation, adapt to the position of screw hole, automatically regulated inserts in the screw hole, and realize detecting the automation of measuring tool through the cooperation of righting platform and spacing portion righting, thereby drive waiting to detect the product and get back to righting, so that detect the measuring tool can normally screw in waiting to detect in the product, accomplish the screw thread and detect, the problem of card material shut down when serious because of waiting to detect the detection result inaccurate that the position of putting of product is incorrect is solved, make the screw thread detect more smooth and easy, improve detection efficiency.
Drawings
Fig. 1 is a cross-sectional view of a universal floating mechanism of a thread inspection apparatus in accordance with an embodiment of the present utility model.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Description of the embodiments
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals identify like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The embodiment of the utility model provides a universal floating mechanism of a thread detection device, which is used for being connected with a thread detection measuring tool to form a universal floating detection head. The universal floating mechanism comprises a mounting body, an elastic component arranged in the mounting body, a universal connector and a detection measuring tool connecting piece used for connecting the detection measuring tool 80. The universal connector comprises a mounting part and a movable part which is connected with the mounting part in a universal rotation way, and the mounting part of the universal connector is mounted in the mounting main body and abuts against the end part of the elastic component in the elastic expansion direction. The movable part of the universal connector extends out from the mounting main body and is connected with the detection measuring tool connecting piece. The universal connector extrudes the elastic component to obtain a floating space so as to realize axial floating. The elastic component provides elastic floating force to enable the detection measuring tool 80 connected with the universal floating mechanism to slow down the impact force when the detection measuring tool 80 is screwed into a piece to be detected and is mutually touched, and the universal connector enables the detection measuring tool 80 to obtain universal rotation performance, so that radial floating is realized.
The movable part of the universal connector comprises a righting platform which is opposite to the floating direction and vertical to the floating direction, and a limiting part which is opposite to the righting platform in the floating direction is arranged in the installation main body. In a natural state, a movable space for the movable part to rotate is reserved between the righting platform and the limiting part. During detection, the external mechanism pushes the whole universal floating mechanism to the direction of a product to be detected, when the detection measuring tool is in contact with the product to be detected, the reaction force pushes the detection measuring tool 80, the detection measuring tool connecting piece and the universal connector to the direction of the elastic component integrally, the righting platform is driven to move towards the limiting part, when the righting platform moves to the limiting part, the limiting part resists the righting platform to limit the detection measuring tool 80, the detection measuring tool connecting piece and the universal connector to continuously push towards the direction of the elastic component, for example, when the movable part of the universal connector is inclined, the righting platform can be restored to the horizontal position under the action of the limiting part, and the automatic righting of the detection measuring tool connecting piece and the detection measuring tool is realized, so that the subsequent rotation is connected into the product to be detected to realize the screw thread detection (the universal floating mechanism is driven to rotate through the external mechanism).
Thereby in the position of waiting to detect the piece untimely (produce the screw hole on waiting to detect the product and detect measuring tool non-coaxial, the screw hole on waiting to detect the product has the contained angle with the measuring tool), detect measuring tool 80 can obtain corresponding inclination through universal connector's movable part rotation, adapt to the position of screw hole, automatically regulated inserts in the screw hole, and realize detecting measuring tool 80's automatic righting through righting platform and spacing portion's cooperation, thereby drive waiting to detect the product and get back to righting, so that detect measuring tool 80 can normally screw in waiting to detect in the product, accomplish the screw thread and detect, solve the testing result inaccurate because of waiting to detect the product put the position and incorrectly bring, the problem that the card material was shut down when serious, make the screw thread detect more smooth and easy, improve detection efficiency.
In a preferred embodiment, as shown in fig. 1, the universal connector comprises a ball fixing member 40a, a self-centering ball 40b rotatably mounted on the ball fixing member 40a, and a universal movable body connected with the self-centering ball 40b, wherein the ball fixing member 40a is slidably mounted in the mounting body, and one end far from the self-centering ball 40b abuts against the end of the elastic component in the elastic expansion direction, and the universal movable body extends out from the mounting body to be connected with the measuring tool connecting member.
The elastic component includes elasticity adjusting screw 20 and spring 30, be equipped with elasticity floating mount position 10a on the installation main part, as shown in fig. 1, elasticity floating mount position 10a is vertical setting and upper end open-ended installation passageway, be equipped with the internal thread that matches with elasticity adjusting screw 20 in the installation passageway, elasticity adjusting screw 20 passes through the screw thread assembly in the installation passageway of installation main part, spring 30 extrudees between elasticity adjusting screw 20 and spheroid mounting 40a, through rotatory elasticity adjusting screw 20, adjust elasticity adjusting screw 20's position through elasticity adjusting screw 20 and the cooperation of internal thread, thereby adjust the power that elasticity adjusting screw 20 applyed on spring 30, realize the elasticity regulation of spring. As shown in fig. 1, the elastic force adjusting screw 20 is adjusted downward, and the force exerted by the elastic force adjusting screw 20 on the spring 30 is increased, so that the elastic force of the spring is increased; conversely, the spring force of the spring is reduced by the spring force adjusting screw 20 being adjusted upward and the force exerted by the spring force adjusting screw 20 on the spring 30 being reduced.
The mounting channel has a sliding slot therein adapted to the ball mount 40a, and the self-centering ball 40b extends from an end of the sliding slot facing the universal adjustment mounting location 10 b.
The elastic component still includes sealing washer 21, and sealing washer 21 inlays the head periphery of establishing at elasticity adjusting screw 20, and when elasticity adjusting screw 20 assembled in the installation passageway of installation main part, sealing washer 21 outer wall hugs closely the inner wall at the installation passageway.
The end of the sphere mount 40a remote from the self-centering sphere 40b (the upper end of the sphere mount 40a in fig. 1) protrudes to form a spring positioning head over which the spring 30 is sleeved.
The universal movable body comprises a sphere connecting part 40c for connecting with the self-centering sphere 40b and a measuring tool connecting part 40e for connecting with the detecting measuring tool connecting piece, the righting platform is a righting shoulder 40d which is arranged between the sphere connecting part 40c and the measuring tool connecting part 40e and protrudes towards the radial periphery, and the righting shoulder 40d protrudes from the sphere connecting part 40c and the measuring tool connecting part 40e in the radial direction.
The mounting body includes a universal adjustment mounting location 10b connected below the resilient floating mounting location 10a and having a radial dimension greater than the resilient floating mounting location 10a, the resilient assembly and ball mount 40a being mounted in the resilient floating mounting location 10a, the positive shoulder 40d being located in the universal adjustment mounting location 10b, the gauge connection portion extending from the universal adjustment mounting location 10b, the limit portion being a limit pin 50. The two limit pins 50 are arranged above two opposite sides of the positive shoulder 40d, and when the limit pins 50 are propped against the positive shoulder 40d, the positive shoulder 40d is in a horizontal state, so that the universal movable body is in a horizontal positive state.
A washer 60 for supporting the positive shoulder 40d is provided in the universal adjustment mounting position 10b at a position below the positive shoulder 40d, and the outer edge of the positive shoulder 40d protrudes outside the washer 60.
The end of the universal adjustment mounting location 10b from which the gauge connecting portion 40e extends is flared, so that the gauge connecting portion 40 can be rotated in a limited range. In the present mechanism, there is occasionally a slight deviation in the position of the product to be inspected due to mechanical precision problems, so that the angle of the gauge connecting portion 40 floats by 0 to 0.2 °.
The measuring tool connecting piece comprises an elastic chuck 70a and an elastic chuck nut 70b sleeved outside the elastic chuck 70a, an elastic clamping hole matched with the elastic chuck 70a is formed in one end of a measuring tool connecting part 40e of the universal connector, connected with the measuring tool connecting piece, at least two open grooves are vertically formed in the side wall of the elastic clamping hole, and the inner diameter of the elastic clamping hole can be increased elastically and reduced elastically through the arrangement of the open grooves.
The outer wall of the elastic clamping hole is provided with external threads matched with the elastic clamping nut 70b, the elastic clamping 70a is in a horn shape, the inner wall of the elastic clamping hole is in a horn shape matched with the elastic clamping 70a, the elastic clamping 70a is arranged in the elastic clamping hole and is locked on the outer wall of the elastic clamping hole through the elastic clamping nut 70b, so that the elastic clamping 70a clamps the detection measuring tool 80.
The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model. It will be apparent that the described embodiments are merely some, but not all, embodiments of the utility model. Based on these embodiments, all other embodiments that may be obtained by one of ordinary skill in the art without inventive effort are within the scope of the utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art may still combine, add or delete features of the embodiments of the present utility model or make other adjustments according to circumstances without any conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present utility model, which also falls within the scope of the present utility model.
Claims (10)
1. The universal floating mechanism of the thread detection device is characterized by comprising a mounting main body, an elastic component, a universal connector and a detection tool connecting piece, wherein the elastic component is arranged in the mounting main body; the universal connector extrudes the elastic component to obtain a floating space so as to realize axial floating;
the movable part of the universal connector comprises a righting platform facing the floating direction, a limiting part opposite to the righting platform in the floating direction is arranged in the installation main body, a movable space for the movable part to rotate is reserved between the righting platform and the limiting part in a natural state, when the universal connector is pushed to extrude the elastic component, the righting platform moves towards the limiting part, and when the righting platform moves to the limiting part, the limiting part acts on the righting platform to limit the universal connector to continue pushing towards the elastic component, and the righting platform is positioned at a horizontal position, so that the movable part is automatically righted.
2. The universal floating mechanism of a thread inspection apparatus according to claim 1, wherein the universal connector comprises a ball fixing member, a self-centering ball rotatably mounted on the ball fixing member, a universal movable body connected to the self-centering ball, the ball fixing member being slidably mounted in the mounting body with an end remote from the self-centering ball abutting against an end of the elastic assembly in an elastic expansion direction, the universal movable body being connected to the inspection gauge connecting member while being extended from the mounting body.
3. The universal floating mechanism of a thread inspection apparatus according to claim 2, wherein the elastic assembly comprises an elastic force adjusting screw which is threadedly fitted in the installation body, and a spring which is pressed between the elastic force adjusting screw and the ball fixing member, the elastic force of the spring being adjusted by threadedly adjusting the position of the elastic force adjusting screw.
4. The universal floating mechanism of the thread detecting device according to claim 3, wherein the elastic component further comprises a sealing ring, the sealing ring is embedded on the periphery of the head of the elastic adjusting screw, and when the elastic adjusting screw is assembled in the installation main body, the outer wall of the sealing ring is tightly attached to the inner wall of the installation main body.
5. A universal floating mechanism for a thread test device according to claim 3 or 4, wherein the end of the ball mount remote from the self-centering ball is raised to form a spring locating head over which the spring is nested.
6. The universal floating mechanism of a thread inspection apparatus according to claim 2, 3 or 4, wherein the universal movable body includes a ball connecting portion for connecting with the self-centering ball and a gauge connecting portion for connecting with the inspection gauge connecting member, the righting platform is a righting shoulder between the ball connecting portion and the gauge connecting portion protruding radially outward from the ball connecting portion and the gauge connecting portion;
the installation main body comprises an elastic floating installation position and a universal adjusting installation position which is connected below the elastic floating installation position and has a radial size larger than that of the elastic floating installation position, the elastic assembly and the ball fixing piece are installed in the elastic floating installation position, the positive shoulder is located in the universal adjusting installation position, the measuring tool connecting part extends out of the universal adjusting installation position, and the limiting part is a limiting pin.
7. The universal floating mechanism of a thread inspection apparatus according to claim 6, wherein a washer for supporting the positive shoulder is provided at a position below the positive shoulder in the universal adjustment mounting position, and an outer edge of the positive shoulder protrudes outside the washer.
8. The universal floating mechanism of a thread inspection apparatus according to claim 6, wherein two of said stop pins are located above opposite sides of said positive shoulder; the port of the universal adjusting installation position, from which the measuring tool connecting part extends, is horn-shaped.
9. The universal floating mechanism of a thread inspection apparatus according to claim 6, wherein said resilient floating mounting location has a sliding slot therein adapted to said ball mount, said self-centering ball extending from an end of said sliding slot facing said universal adjustment mounting location.
10. The universal floating mechanism of a thread testing apparatus according to any one of claims 1 to 4, wherein the testing tool connecting piece comprises a collet and a collet nut sleeved outside the collet, one end of the universal connector connected with the testing tool connecting piece is provided with a collet hole adapted to the collet, the outer wall of the collet hole is provided with threads adapted to the collet nut, the collet is horn-shaped, the inner wall of the collet hole is horn-shaped adapted to the collet, and the collet is installed in the collet hole and locked on the outer wall of the collet hole through the collet nut, so that the collet clamps the testing tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320917457.3U CN219757139U (en) | 2023-04-23 | 2023-04-23 | Universal floating mechanism of thread detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320917457.3U CN219757139U (en) | 2023-04-23 | 2023-04-23 | Universal floating mechanism of thread detection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219757139U true CN219757139U (en) | 2023-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320917457.3U Active CN219757139U (en) | 2023-04-23 | 2023-04-23 | Universal floating mechanism of thread detection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219757139U (en) |
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2023
- 2023-04-23 CN CN202320917457.3U patent/CN219757139U/en active Active
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