CN220105191U - On-off protective device - Google Patents
On-off protective device Download PDFInfo
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- CN220105191U CN220105191U CN202321150714.1U CN202321150714U CN220105191U CN 220105191 U CN220105191 U CN 220105191U CN 202321150714 U CN202321150714 U CN 202321150714U CN 220105191 U CN220105191 U CN 220105191U
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- 238000012360 testing method Methods 0.000 claims abstract description 48
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- 239000004020 conductor Substances 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 19
- 230000008569 process Effects 0.000 abstract description 18
- 238000009413 insulation Methods 0.000 abstract description 13
- 230000005611 electricity Effects 0.000 description 8
- 238000007599 discharging Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
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- 210000002421 cell wall Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model provides an on-off electric protection device, comprising: the on-off assembly is arranged on an electrified wire between the tested equipment and the step-up transformer, and at least part of the on-off assembly is adjustably arranged to have a disconnection state for disconnecting the tested equipment from the step-up transformer and a communication state for conducting the tested equipment from the step-up transformer; the guard plate is arranged at intervals with the step-up transformer so as to separate an operator from the step-up transformer through the guard plate. The on-off protective device is simple in structure and convenient to operate, and can effectively solve the problem that an operator is easy to get an electric shock accident when the power is turned on or off in the process of conducting insulation test by utilizing the step-up transformer in the prior art.
Description
Technical Field
The utility model relates to the field of electrical power-on test protection, in particular to a power-on/off protection device.
Background
The step-up transformer is used for conducting insulation strength test under specified voltage on various electrical products, electrical equipment, insulating materials and the like, checking the insulation level of the products, finding out insulation defects of the tested products and measuring the capability of bearing overvoltage.
At present, when a step-up transformer is used for insulation test, the step-up transformer needs to be repeatedly charged and discharged, and usually after power failure, an operator needs to manually remove a test wire on a wiring pile of the step-up transformer. However, the voltage level is higher (the highest voltage exceeds 10 KV), and no obvious disconnection point exists after power failure, so that an operator cannot intuitively judge whether the power is on or not, and the operator needs to use a special appliance to carry out electricity inspection and discharge for many times, and the power can be directly connected with the top end of the step-up transformer for disconnection after the disconnection is carried out.
Therefore, in the whole testing process, in order to ensure whether the testing equipment is electrified or not, repeated electricity testing is needed, so that the whole electricity testing process is complicated, and the factors of inaccurate special appliances and incorrect operation methods of operators exist, so that great potential safety hazards still exist in the testing process, and the operators have certain electric shock risks and can influence the working efficiency.
Disclosure of Invention
The utility model mainly aims to provide a power-on and power-off protection device which solves the problem that in the prior art, in the process of conducting insulation test by utilizing a step-up transformer, electric shock accidents of operators are easy to occur when power is turned on and off.
In order to achieve the above object, the present utility model provides an on-off power protection device, comprising: the on-off assembly is arranged on an electrified wire between the tested equipment and the step-up transformer, and at least part of the on-off assembly is adjustably arranged to have an off state for breaking the circuit between the tested equipment and the step-up transformer and a communication state for conducting the tested equipment and the step-up transformer; guard plate, guard plate and boost transformer interval set up to separate operating personnel and boost transformer through the guard plate.
Further, the on-off protection device further comprises an operation part, the operation part is movably arranged to trigger the on-off assembly to be switched to the off state or the on state through the operation part, and at least part of the operation part is made of an insulating material.
Further, the power on-off assembly comprises a moving contact and a fixed contact; the movable contact and the fixed contact are respectively connected with the electrified wire, and the movable contact has a contact state and a separation state; when the movable contact is in a contact state, the movable contact is communicated with the fixed contact, so that the tested equipment is in a communication state with the step-up transformer; when the movable contact is in a separation state, the movable contact is separated from the fixed contact, so that the tested equipment and the step-up transformer are in a disconnection state.
Further, the on-off protection device further comprises an insulating plate, and the moving contact and the fixed contact are arranged on the insulating plate in a penetrating mode so as to fix the on-off assembly through the insulating plate.
Further, the on-off protective device further comprises a mounting seat, the mounting seat comprises a mounting seat body and a plurality of rollers, and the step-up transformer is arranged on the mounting seat body; the plurality of rollers are all rotatably arranged at the bottom of the mounting seat body, so that the rollers drive the mounting seat body to move, and the position of the step-up transformer is adjusted.
Further, the mounting seat body is provided with a mounting groove matched with the step-up transformer, and the step-up transformer is clamped into the mounting groove; the mounting groove is provided with a first matching part on the groove wall, the outer peripheral surface of the step-up transformer is provided with a second matching part, one of the first matching part and the second matching part is a bulge, the other of the first matching part and the second matching part is a concave part, and the bulge stretches into the concave part to limit a stop with the inner wall of the concave part so as to fix the step-up transformer through the first matching part and the second matching part; or the on-off protection device further comprises a clamping piece, wherein the clamping piece can be arranged on the mounting seat body in an opening and closing manner so as to clamp the step-up transformer through the clamping piece.
Further, the on-off protection device further comprises a fixing support, the fixing support is arranged on the mounting seat, the fixing support and the step-up transformer are arranged at intervals, and the insulating plate is fixedly arranged on the fixing support.
Further, the protection plate is fixedly arranged on the supporting base surface, and the tested equipment is positioned at one side of the protection plate far away from the step-up transformer; or the on-off protective device further comprises a separation fence which is fixedly arranged on the supporting base surface, at least part of the separation fence encloses a test space, the step-up transformer is movably arranged in the test space, the separation fence and the step-up transformer are arranged at intervals, and the protection plate is fixedly connected with the separation fence and is fixed on the supporting base surface.
Further, an observation window is arranged on the protection plate, the observation window is made of transparent materials, and an operator observes the step-up transformer through the observation window; and/or the protection plate is provided with a hanging piece, and the energizing lead is movably hung on the hanging piece.
Further, the on-off protection device further includes a placement frame provided at a side portion of the protection plate, and the operation member is movably placed on the placement frame.
By applying the technical scheme of the utility model, the on-off protection device can enable the tested equipment and the step-up transformer to have a disconnection point by arranging the on-off assembly between the tested equipment and the step-up transformer, so that an operator can directly judge whether the power between the tested equipment and the step-up transformer is off or not, the test times of discharging and electricity testing are saved, and the working efficiency is improved; meanwhile, through the arrangement of the protection plates, operators and the step-up transformer can be isolated, the operators and the step-up transformer can be prevented from being in direct contact, and then the operators are prevented from electric radiation and electric shock accidents, so that the safety of testing is improved. The on-off protective device is simple in structure and convenient to operate, and can effectively solve the problem that an operator is easy to get an electric shock accident when the power is turned on or off in the insulation test process by utilizing the step-up transformer in the prior art.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 shows a schematic perspective view of an embodiment of an on-off power protection device according to the utility model.
Wherein the above figures include the following reference numerals:
1. a step-up transformer; 2. an on-off power assembly; 201. a moving contact; 202. a stationary contact; 3. energizing the wire; 4. a protection plate; 401. an observation window; 5. an operation member; 6. an insulating plate; 7. a mounting base; 701. a mounting seat body; 702. a roller; 8. a fixed bracket; 9. a placing rack; 10. and hanging the piece.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1, the on-off protection device provided by the present utility model includes an on-off assembly 2 and a protection board 4, wherein the on-off assembly 2 is disposed on an energizing wire 3 between a device under test and a step-up transformer 1, and at least part of the on-off assembly 2 is adjustably disposed to have an off state for breaking the circuit between the device under test and the step-up transformer 1 and a on state for conducting the device under test and the step-up transformer 1; the shielding plate 4 is provided at a distance from the step-up transformer 1 to separate the operator from the step-up transformer 1 by the shielding plate 4.
Therefore, the on-off protection device provided by the utility model has the advantages that the on-off assembly 2 is arranged between the tested equipment and the step-up transformer 1, so that a disconnection point is arranged between the tested equipment and the step-up transformer 1, an operator can directly judge whether the power between the tested equipment and the step-up transformer 1 is off, the test times of discharging and electricity testing are saved, and the working efficiency is improved; meanwhile, through the arrangement of the protection plate 4, an operator and the step-up transformer 1 can be isolated, the operator and the step-up transformer 1 can be prevented from being in direct contact, and further the operator can avoid electric radiation and electric shock accidents, so that the safety of testing is improved. The on-off protective device is simple in structure and convenient to operate, and can effectively solve the problem that an operator is easy to get an electric shock accident when the power is turned on or off in the insulation test process by utilizing the step-up transformer 1 in the prior art.
In the specific implementation process, the distance between the step-up transformer 1 and the protection plate is set according to the voltage class matching of the step-up transformer 1. By adopting the arrangement, the operation of isolating operators outside the safety distance matched with the voltage level is facilitated, so that the safety of the on-off operation between the step-up transformer 1 and the tested equipment is improved, the operators are prevented from electric radiation, and the personal safety of the operators is improved.
In this embodiment, the on-off protection device further includes an operating member 5, where the operating member 5 is movably disposed to trigger the on-off assembly 2 to switch to the off state or the on state by the operating member 5, and at least part of the operating member 5 is made of an insulating material. By adopting the arrangement, the direct contact between an operator and the power on-off assembly 2 can be avoided, and the safety of operation is improved.
Preferably, the operating member 5 is an insulating operating rod, and with such a configuration, the on-off assembly 2 can be installed at any position according to the actual situation, and an operator can switch the on-off assembly 2 to the off state or the on state by selecting insulating operating rods with different lengths or extending the length of the insulating operating rod according to the actual situation, thereby improving the operation safety.
The specific structure of the power on-off assembly 2 in the specific implementation process is that the power on-off assembly 2 comprises a moving contact 201 and a fixed contact 202; the movable contact 201 and the stationary contact 202 are connected to the energizing conductor 3, respectively, and the movable contact 201 has a contact state and a separated state.
When the movable contact 201 is in a contact state, the movable contact 201 is communicated with the fixed contact 202, so that the tested equipment is in a communication state with the step-up transformer 1; when the moving contact 201 is in a separated state, the moving contact 201 and the fixed contact 202 are separated, so that the tested equipment and the step-up transformer 1 are in a disconnected state.
Preferably, the on-off assembly 2 is an isolating switch, and by adopting the structure, an obvious disconnection point can be formed when the power is off, so that an operator can intuitively judge whether the power is off between the tested equipment and the step-up transformer 1, the operator can conveniently disconnect or wire, the time for discharging and testing the power is saved, and the working efficiency of the test is improved.
In this embodiment, the on-off protection device further includes an insulating plate 6, and the moving contact 201 and the fixed contact 202 are disposed on the insulating plate 6 in a penetrating manner, so as to fix the on-off assembly 2 through the insulating plate 6.
In this embodiment, the on-off protection device further includes a mounting seat 7, the mounting seat 7 includes a mounting seat body 701 and a plurality of rollers 702, and the step-up transformer 1 is disposed on the mounting seat body 701; the rollers 702 are rotatably disposed at the bottom of the mounting base body 701, so that the rollers 702 drive the mounting base body 701 to move to adjust the position of the step-up transformer 1. With such a configuration, the position of the step-up transformer 1 and the distance between the step-up transformer 1 and the protection plate 4 can be arbitrarily adjusted according to the actual situation, so that the operator and the step-up transformer 1 have a predetermined safety distance, thereby improving safety.
In the first embodiment of the connection mode of the mounting seat body 701 and the step-up transformer 1 provided by the utility model, a mounting groove matched with the step-up transformer 1 is formed on the mounting seat body 701, and the step-up transformer 1 is clamped into the mounting groove; wherein, be provided with first cooperation portion on the cell wall of mounting groove, be provided with the second cooperation portion on the outer peripheral face of step-up transformer 1, one of first cooperation portion and second cooperation portion is protruding, and another one of first cooperation portion and second cooperation portion is the concave part, and protruding stretches into in the concave part in order to limit stop with the inner wall of concave part to fixed step-up transformer 1 through first cooperation portion and second cooperation portion. With such a configuration, the step-up transformer 1 is easily fixed to the mount body 701, and the step-up transformer 1 is prevented from being shaken or fallen down when the mount 7 is moved.
In the second embodiment of the connection mode between the mounting base body 701 and the step-up transformer 1 provided by the present utility model, the on-off protection device further includes a clamping member, where the clamping member is openably and closably disposed on the mounting base body 701, so as to clamp the step-up transformer 1 by the clamping member. With such a configuration, the step-up transformer 1 is easily fixed to the mount body 701, and the step-up transformer 1 is prevented from being shaken or fallen down when the mount 7 is moved.
In this embodiment, the on-off protection device further includes a fixing bracket 8, the fixing bracket 8 is disposed on the mounting seat 7, the fixing bracket 8 is disposed at intervals with the step-up transformer 1, and the insulating plate 6 is fixedly disposed on the fixing bracket 8.
In the first embodiment of the fixing manner of the protection plate 4 provided by the utility model, the protection plate 4 is used for being fixedly arranged on the supporting base surface, and the tested device is positioned on one side of the protection plate 4 away from the step-up transformer 1. By adopting the arrangement, the protection plate 4 is not easy to topple over, and the tested equipment is arranged on one side of the protection plate 4 far away from the step-up transformer 1, so that an operator can conveniently replace the tested equipment, and the operator is always out of the safety distance.
In the second embodiment of the fixing manner of the protection plate 4 provided by the utility model, the on-off protection device further comprises a separation fence which is fixedly arranged on the supporting base surface, at least part of the separation fence encloses a test space, the step-up transformer 1 is movably arranged in the test space, the separation fence is arranged at intervals with the step-up transformer 1, and the protection plate 4 is fixedly connected with the separation fence and is fixedly arranged on the supporting base surface. By adopting the arrangement, the personnel are isolated outside the test space, so that the personnel are prevented from entering the test space by mistake, and the safety of the test is further improved.
In a specific implementation, the protection plate 4 is provided with an observation window 401, the observation window 401 is made of a transparent material, and an operator observes the step-up transformer 1 through the observation window 401. Preferably, the viewing window 401 is made of a transparent plexiglass plate.
In a specific implementation process, the protection plate 4 is provided with a hanging piece 10, and the energizing lead 3 is movably hung on the hanging piece 10.
In the actual working process, when the insulation test is not performed or the insulation test is completed, the energizing conductor 3 is disconnected from the tested equipment, and then the energizing conductor 3 is arranged and then hung on the hanging piece 10.
In a specific implementation process, the on-off protection device further comprises a placing frame 9, the placing frame 9 is arranged on the side portion of the protection plate 4, and the operation part 5 is movably placed on the placing frame 9.
In the actual working process, when the operation part 5 is not needed, the operation part 5 is placed on the placing frame 9, and the operation part 5 is placed on the side part of the protection plate 4 through the placing frame 9, so that the operation part is convenient for an operator to take.
In the implementation process, the on-off protective device further comprises a control button, the control button is arranged at a position close to the protection plate 4 and is connected with the step-up transformer 1 through the power-on lead 3, and an operator controls whether the step-up transformer 1 is electrified or not through the control button.
In the implementation working process, the specific working process of the insulation test is as follows:
before the insulation test is prepared, the step-up transformer 1 is first moved by the mount 7 according to the voltage level matching so that a predetermined safety distance is provided between the step-up transformer 1 and the shield plate 4. Secondly, operating personnel stand in the one side that the step-up transformer 1 was kept away from to guard plate 4, take off circular telegram wire 3 from hanging and establish piece 10, be connected circular telegram wire 3 and tested equipment, then take out operating part 5 (i.e. the action bars) from rack 9, control the moving contact of break-make electricity subassembly 2 through operating part 5 (i.e. the action bars), make the moving contact with the static contact, and then make and communicate between tested equipment and the step-up transformer 1, when operating personnel used operating part 5 (i.e. the action bars) to control the moving contact of break-make electricity subassembly 2, operating personnel observe specific operation through observation window 401, avoid the maloperation.
After the preparation work is completed, the operator controls the control button to power up the step-up transformer 1. Then, a test is performed, and in the test process, an operator can observe specific conditions of the step-up transformer 1 and the power on-off assembly 2 through the observation window 401.
After the test is completed, an operator controls the control button to cut off the power of the step-up transformer 1, then controls the moving contact of the power-on and power-off assembly 2 through the operation part 5 (namely the operation rod), so that the moving contact is separated from the fixed contact, the operator observes whether an obvious disconnection point exists between the moving contact and the fixed contact through the observation window 401, and after the obvious disconnection point is determined, the operator disconnects the power-on lead 3 from the tested equipment.
By adopting the structure, the operation personnel are isolated from the step-up transformer 1 through the protection plate 4, and the on-off assembly 2 is triggered through the operation rod to be switched to the off state or the on state, so that the operation of the operation personnel outside the safe distance is intuitively and safely realized, and the safety and the reliability and the working efficiency of the test work are ensured.
From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:
the utility model provides a power-on and power-off protection device, which comprises a power-on and power-off assembly 2 and a protection plate 4, wherein the power-on and power-off assembly 2 is arranged on a power-on lead 3 between tested equipment and a step-up transformer 1, and at least part of the power-on and power-off assembly 2 is adjustably arranged so as to have a disconnection state for disconnecting the tested equipment from the step-up transformer 1 and a communication state for conducting the tested equipment from the step-up transformer 1; the shielding plate 4 is provided at a distance from the step-up transformer 1 to separate the operator from the step-up transformer 1 by the shielding plate 4.
Therefore, the on-off protection device provided by the utility model can enable the tested equipment and the step-up transformer 1 to have a disconnection point by arranging the on-off assembly 2 between the tested equipment and the step-up transformer 1, so that an operator can directly judge whether the tested equipment and the step-up transformer 1 are powered off or not, the test times of discharging and electricity testing are saved, and the working efficiency is improved. Meanwhile, through the arrangement of the protection plate 4, an operator and the step-up transformer 1 can be isolated, the operator and the step-up transformer 1 can be prevented from being in direct contact, and further the operator can avoid electric radiation and electric shock accidents, so that the safety of testing is improved. The on-off protective device is simple in structure and convenient to operate, and can effectively solve the problem that an operator is easy to get an electric shock accident when the power is turned on or off in the insulation test process by utilizing the step-up transformer 1 in the prior art.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. An on-off electrical protection device, comprising:
an on-off assembly (2), the on-off assembly (2) being arranged on an energizing conductor (3) between a device under test and a step-up transformer (1), at least part of the on-off assembly (2) being adjustably arranged to have an off state in which the device under test is disconnected from the step-up transformer (1) and a on state in which the device under test is conducted with the step-up transformer (1);
guard plate (4), guard plate (4) with step-up transformer (1) interval sets up, in order to pass through guard plate (4) separate operating personnel with step-up transformer (1).
2. The on-off protection device according to claim 1, characterized in that it further comprises an operating member (5), said operating member (5) being movably arranged to trigger the switching of the on-off assembly (2) to the off-state or on-state by means of the operating member (5), at least part of the operating member (5) being made of an insulating material.
3. The on-off protection device according to claim 2, characterized in that the on-off assembly (2) comprises a moving contact (201) and a stationary contact (202); the movable contact (201) and the fixed contact (202) are respectively connected with the energizing lead (3), and the movable contact (201) has a contact state and a separation state;
when the movable contact (201) is in a contact state, the movable contact (201) is communicated with the fixed contact (202) so that the tested equipment and the step-up transformer (1) are in the communication state; when the movable contact (201) is in a separated state, the movable contact (201) and the fixed contact (202) are separated, so that the tested equipment and the step-up transformer (1) are in the disconnected state.
4. A power on/off protection device according to claim 3, characterized in that the power on/off protection device further comprises an insulating plate (6), the moving contact (201) and the stationary contact (202) being arranged on the insulating plate (6) in a penetrating way to fix the power on/off assembly (2) through the insulating plate (6).
5. The on-off power protection device according to claim 4, further comprising a mounting base (7), the mounting base (7) comprising a mounting base body (701) and a plurality of rollers (702), the step-up transformer (1) being arranged on the mounting base body (701); the rollers (702) are rotatably arranged at the bottom of the mounting seat body (701) so as to drive the mounting seat body (701) to move through the rollers (702) to adjust the position of the step-up transformer (1).
6. The on-off power protection device according to claim 5, wherein the mounting seat body (701) is provided with a mounting groove matched with the step-up transformer (1), and the step-up transformer (1) is clamped into the mounting groove; the mounting groove is provided with a first matching part on the groove wall, the outer peripheral surface of the step-up transformer (1) is provided with a second matching part, one of the first matching part and the second matching part is a bulge, the other of the first matching part and the second matching part is a concave part, and the bulge stretches into the concave part to limit a stop with the inner wall of the concave part so as to fix the step-up transformer (1) through the first matching part and the second matching part; or alternatively
The on-off protection device further comprises a clamping piece, wherein the clamping piece is arranged on the mounting seat body (701) in an openable and closable manner, so that the step-up transformer (1) is clamped through the clamping piece.
7. The on-off protection device according to claim 5, further comprising a fixing bracket (8), wherein the fixing bracket (8) is arranged on the mounting base (7), the fixing bracket (8) is arranged at intervals with the step-up transformer (1), and the insulating plate (6) is fixedly arranged on the fixing bracket (8).
8. The on-off power protection device according to any one of claims 2 to 7, wherein,
the protection plate (4) is used for being fixedly arranged on a supporting base surface, and the tested equipment is positioned at one side of the protection plate (4) far away from the step-up transformer (1); or alternatively
The on-off protective device further comprises a separation fence which is fixedly arranged on the supporting base surface, at least part of the separation fence encloses a test space, the step-up transformer (1) is movably arranged in the test space, the separation fence is arranged at intervals with the step-up transformer (1), and the protection plate (4) is fixedly connected with the separation fence and is fixed on the supporting base surface.
9. The on-off protection device according to any one of claims 2 to 7, characterized in that an observation window (401) is provided on the protection plate (4), the observation window (401) being made of a transparent material, the operator observing the step-up transformer (1) through the observation window (401); and/or
The protection plate (4) is provided with a hanging piece (10), and the energizing lead (3) is movably hung on the hanging piece (10).
10. The on-off protection device according to any one of claims 2 to 7, characterized in that it further comprises a rack (9), said rack (9) being provided on the side of the protection plate (4), said operating member (5) being movably placed on said rack (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321150714.1U CN220105191U (en) | 2023-05-11 | 2023-05-11 | On-off protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321150714.1U CN220105191U (en) | 2023-05-11 | 2023-05-11 | On-off protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220105191U true CN220105191U (en) | 2023-11-28 |
Family
ID=88848036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321150714.1U Active CN220105191U (en) | 2023-05-11 | 2023-05-11 | On-off protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220105191U (en) |
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2023
- 2023-05-11 CN CN202321150714.1U patent/CN220105191U/en active Active
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