CN212043402U - Automatic cover plate dismounting machine - Google Patents
Automatic cover plate dismounting machine Download PDFInfo
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- CN212043402U CN212043402U CN202020656040.2U CN202020656040U CN212043402U CN 212043402 U CN212043402 U CN 212043402U CN 202020656040 U CN202020656040 U CN 202020656040U CN 212043402 U CN212043402 U CN 212043402U
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Abstract
The utility model discloses an automatic cover plate dismounting machine, which comprises a dismounting mechanism, a control system and a storage bin for accommodating a cover plate; the dismounting mechanism comprises a dismounting rack, a three-axis moving mechanism, a connecting seat, a clamping assembly and a positioning assembly; the three-axis moving mechanism is arranged on the disassembling and assembling rack; the connecting seat is arranged on the three-axis moving mechanism and moves in the three-axis direction under the driving of the three-axis moving mechanism; the clamping assembly is arranged on the connecting seat; the positioning component is arranged on the connecting seat; the control system is electrically connected with the disassembling and assembling mechanism; the utility model discloses a feed bin that is equipped with dismouting mechanism, control system and holding apron under control system's control, passes through locating component by dismouting mechanism, realizes feed position, mounted position, the location of placing position and apron to through the cooperation of triaxial moving mechanism and centre gripping subassembly, carry out centre gripping, aversion and dismouting to the apron, thereby realize automatic dismouting apron, its dismouting is efficient, and the cost of labor is low.
Description
Technical Field
The utility model relates to a carry out the dismouting to PCB's apron in SMT technology, especially relate to an apron automatic assembly and disassembly machine.
Background
SMT is Surface mount technology (Surface mount technology), an acronym for Surface mount technology, which is one of the most popular techniques and processes in the electronic assembly industry.
The apron needs to be installed after current SMT workshop carries out the paster to the PCB board, and this apron uses with PCB board paster face tool cooperation, and its effect prevents PCB board paster face reflow soldering in-process, and the primary and secondary board can be because of the plastic deformation before the supplied materials and during the reflow soldering the thermal deformation that the primary and secondary board leads to hot differential reaction produces the warpage rosin joint, leads to the yields low, increases manufacturing cost. Therefore, the cover plate is needed to apply pressure to the sub-plates and balance the temperature, so that in the process of temperature change, the deformation amount of the sub-plates is controlled within the process requirement, the sub-plates synchronously deform and are always attached. And after the reflow soldering is finished, the cover plate is detached.
However, the existing cover plate is disassembled and assembled manually, and the defects of low disassembling and assembling efficiency and high labor cost exist.
In view of this, the present designer is able to make a deep conception on the defects and inconveniences caused by the imperfect assembly and disassembly of the cover plate, and actively research, improve, try and develop the present invention.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an apron automatic assembly and disassembly machine for automatic dismouting apron improves dismouting efficiency and reduces the cost of labor.
In order to achieve the above purpose, the solution of the present invention is:
an automatic cover plate disassembling and assembling machine comprises a disassembling and assembling mechanism, a control system and a storage bin for accommodating a cover plate; the disassembling and assembling mechanism comprises a disassembling and assembling rack, a three-axis moving mechanism, a connecting seat, a clamping assembly and a positioning assembly; the three-axis moving mechanism is arranged on the disassembling and assembling rack; the connecting seat is arranged on the three-axis moving mechanism and moves in the three-axis direction under the driving of the three-axis moving mechanism; the clamping assembly is arranged on the connecting seat and used for clamping and fixing the cover plate; the positioning assembly is arranged on the connecting seat and used for positioning the feeding position, the mounting position and the placing position of the cover plate; the control system is electrically connected with the disassembling and assembling mechanism and used for controlling the disassembling and assembling mechanism.
The positioning assembly comprises a positioning support rod, a camera and a light supplement lamp; one end of the positioning support rod is fixed on the connecting seat; the camera is arranged at the other end of the positioning support rod; the light filling lamp is installed on the positioning support rod and used in cooperation with the camera.
The clamping assembly comprises a clamping seat, a first driving piece, a transmission screw rod and two clamping plates; the clamping seat is fixed on the connecting seat; the first driving piece is arranged on the clamping seat; the transmission screw rod is in rotating fit with the clamping seat and is in transmission connection with the first driving piece; the two clamping plates are in transmission connection with the transmission screw rod and move in opposite directions or in reverse directions under the driving of the transmission screw rod.
The clamping device is characterized in that a sliding rail is installed on the clamping seat, a sliding block is installed at one end, facing the clamping seat, of the clamping plate, and the clamping plate is in sliding fit with the sliding rail of the clamping seat through the sliding block.
The clamping assembly further comprises a first air cylinder and a clamping plate, and the first air cylinder is mounted on the clamping plate; the clamping plate is installed on a piston rod of the first air cylinder and is driven by the first air cylinder to movably enter and exit the sinking platform.
The bin comprises a bin body bracket, a conveying assembly and a lifting assembly; the conveying assembly is arranged on the bin body bracket and used for placing and conveying the cover plate, and a lifting gap is formed in the conveying assembly; the lifting assembly is matched with one end of the conveying assembly, a lifting plate is arranged on the lifting assembly, and the lifting plate movably enters and exits the lifting gap.
The conveying assembly comprises a second driving piece, two rollers, a bearing plate and a conveying belt; the second driving piece is arranged on the bin body bracket; the two rollers are respectively arranged at two ends of the bin body bracket; the supporting plate is fixed on the bin body bracket and is positioned between the two rollers; the conveying belt is sleeved on the bearing plate and is in transmission connection with the two rollers and the second driving piece respectively.
The lifting assembly comprises a third driving piece, a sliding seat and a sliding block; the third driving piece and the sliding seat are both arranged on the bin body bracket; the sliding block is in sliding fit with the sliding seat and is in transmission connection with the third driving piece; the lifting plate is fixed on the sliding block.
The lifting assembly further comprises two groups of correction assemblies, and each correction assembly comprises a correction plate, a second cylinder and a positioning block; the second cylinder is matched with the upper part of the bin body bracket; the correcting plate is arranged on a piston rod of the second cylinder and is movably matched with one side of the lifting plate; the positioning block is arranged opposite to the correction plate and matched with the other side of the lifting plate.
The disassembly and assembly rack is arranged on an AGV trolley, and the bin body support is arranged on the AGV trolley.
After the scheme is adopted, the utility model discloses a feed bin that is equipped with dismouting mechanism, control system and holding apron under control system's control, passes through locating component by dismouting mechanism, realizes feed position, mounted position, the location of placing position and apron to through the cooperation of triaxial moving mechanism and centre gripping subassembly, carry out centre gripping, aversion and dismouting to the apron, thereby realize automatic dismouting apron, compare with artifical dismouting apron, its dismouting is efficient, and the cost of labor is low.
Drawings
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
FIG. 2 is a schematic structural view of the present invention with the detachable frame removed;
FIG. 3 is a schematic view of the mounting and dismounting mechanism of the preferred embodiment of the present invention;
fig. 4 is a schematic structural diagram of a storage bin according to a preferred embodiment of the present invention.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1 to 4, the preferred embodiment of the automatic cover plate disassembling and assembling machine of the present invention includes a disassembling and assembling mechanism 10, a control system 20, and a storage bin 30 for storing cover plates; the dismounting mechanism 10 comprises a dismounting rack 1, a three-axis moving mechanism 2, a connecting seat 3, a clamping assembly 4 and a positioning assembly 5; the three-axis moving mechanism 2 is arranged on the disassembling and assembling rack 1; the connecting seat 3 is arranged on the three-axis moving mechanism 2 and moves in three-axis directions under the drive of the three-axis moving mechanism 2, and in the embodiment, the connecting seat 3 moves to and fro between the storage bin 30 and the dismounting workbench under the drive of the three-axis moving mechanism 2; the clamping component 4 is arranged on the connecting seat 3 and used for clamping and fixing the cover plate; the positioning component 5 is arranged on the connecting seat 3 and used for positioning the feeding position, the mounting position and the placing position of the cover plate; the control system 20 is electrically connected to the disassembling and assembling mechanism 10 for controlling the disassembling and assembling mechanism 10.
When the cover plate needs to be installed, a worker firstly places the cover plate in the stock bin 30, under the control of the control system 20, the disassembly and assembly mechanism 10 moves the connecting seat 3 into the stock bin 30 through the three-axis moving mechanism 2, the positioning component 5 positions the position of the cover plate in the stock bin 30, and the control system 20 controls the three-axis moving mechanism 2 to move the clamping component 4 to be close to the cover plate and clamp and fix the cover plate on the clamping component 4 according to the positioning information; then, the disassembly and assembly mechanism 10 moves the connecting seat 3 to the disassembly and assembly workbench through the three-axis moving mechanism 2, the positioning assembly 5 positions the installation position on the PCB on the disassembly and assembly workbench, and the control system 20 controls the three-axis moving mechanism 2 to move the clamping assembly 4 to be close to the PCB according to the positioning information, and the clamping assembly is installed on the PCB by pressing down the cover plate.
On the contrary, when the cover plate needs to be disassembled, the PCB of the cover plate to be disassembled is fixed on the disassembling and assembling workbench, under the control of the control system 20, the disassembling and assembling mechanism 10 moves the connecting seat 3 to the disassembling and assembling workbench through the three-axis moving mechanism 2, the positioning assembly 5 positions the position of the cover plate on the PCB, and the control system 20 controls the three-axis moving mechanism 2 to move the clamping assembly 4 to be close to the cover plate and clamp and fix the cover plate on the clamping assembly 4 according to the positioning information; then, the disassembly and assembly mechanism 10 moves the connecting seat 3 upwards through the three-axis moving mechanism 2 to disassemble the cover plate from the PCB, and then the connecting seat 3 is moved into the stock bin 30 through the three-axis moving mechanism 2, the positioning assembly 5 positions the required placing position of the cover plate in the stock bin 30, and the control system 20 places the cover plate on the placing position in the stock bin 30 according to the positioning information.
The utility model discloses a focus on, the utility model discloses a feed bin 30 that is equipped with dismouting mechanism 10, control system 20 and holding apron, under control system 20's control, pass through locating component 5 by dismouting mechanism 10, realize to the feed position, mounted position, place the location of position and apron to through the cooperation of triaxial moving mechanism 2 and centre gripping subassembly 4, carry out centre gripping, aversion and dismouting to the apron, thereby realize automatic dismouting apron, compare with artifical dismouting apron, its dismouting is efficient, and the cost of labor is low.
The positioning assembly 5 comprises a positioning support rod 51, a camera 52 and a light supplement lamp 53; one end of the positioning strut 51 is fixed on the connecting seat 3; the camera 52 is mounted at the other end of the positioning rod 51; the fill light 53 is mounted on the positioning rod 51 and used in cooperation with the camera 52. During the use, light filling lamp 53 can provide a good environment of getting for instance for camera 52, later, camera 52 removes along with hookup seat 3 to carry out real-time video recording to camera 52 below, and carry out accurate location according to apron characteristic, sign characteristic, carry out accurate removal to hookup seat 3 with cooperation triaxial moving mechanism 2, and then the dismouting of cooperation apron.
The clamping assembly 4 comprises a clamping seat 41, a first driving member 42, a transmission screw 43 and two clamping plates 44; the clamping seat 41 is fixed on the connecting seat 3; the first driving member 42 is mounted on the holder 41, in this embodiment, the first driving member 42 is a driving motor; the transmission screw rod 43 is rotationally matched on the clamping seat 41 and is in transmission connection with the first driving piece 42; the two clamping plates 44 are in transmission connection with the transmission screw rod 43 and move towards or away from each other under the driving of the transmission screw rod 43. When the clamping device is used, the driving motor rotates forwards and drives the transmission screw rod 43 to rotate forwards, and the transmission screw rod 43 rotating forwards drives the two clamping plates 44 to move in opposite directions, so that the two clamping plates 44 are close to each other, and the cover plate is clamped and fixed; on the contrary, the driving motor rotates reversely, and drives the transmission screw 43 to rotate reversely, and the transmission screw 43 rotating reversely drives the two clamping plates 44 to move reversely, so that the two clamping plates 44 are away from each other, and the cover plate fixed by clamping is loosened.
The holder 41 is provided with a slide rail 411, the holding plate 44 is provided with a slider 441 at one end facing the holder 41, and the holding plate 44 is slidably fitted to the slide rail 411 of the holder 41 via the slider 441. The slide rail 411 and the slider 441 are provided to guide the movement of the two holding plates 44, and also to stabilize the movement of the two holding plates 44.
The clamping plate 44 is further provided with a sinking platform 442, the clamping assembly 4 further comprises a first air cylinder 45 and a clamping plate 46, and the first air cylinder 45 is mounted on the clamping plate 44; the clamping plate 46 is mounted on the piston rod of the first cylinder 45 and is movable into and out of the sink 442 by the actuation of the first cylinder 45. During the use, two grip blocks 44 are close to each other to press from both sides tightly the apron through heavy platform 442 lateral wall on two grip blocks 44, at this moment, utilize the piston rod of first cylinder 45 to pull-in heavy platform 442 with grip block 46, grip block 46 can compress tightly the apron and fix on heavy platform 442 roof, thereby makes the centre gripping of centre gripping subassembly 4 to the apron more firm, avoids the apron to drop.
The bottom of the dismounting frame 1 is provided with a first wheel 11 and a first foot support 12 which can be rotatably adjusted. The first wheel 11 is arranged, so that the dismounting mechanism 10 is convenient to move, when the dismounting mechanism 10 needs to be moved, the first foot support 12 is rotated reversely to be away from the ground, and the dismounting frame 1 is supported by the first wheel 11; on the contrary, when the detaching mechanism 10 is detached, in order to ensure the stability of the detaching mechanism 10, the first support 12 is rotated forward, so that the detaching mechanism 10 is placed on the ground through the first support 12. Of course, the dismounting frame 1 can also be mounted on an AGV. The moving and the parking of the dismounting frame 1 are controlled by an AGV trolley, and the automatic dismounting and mounting of the cover plate is further realized.
The storage bin 30 comprises a bin body bracket 6, a conveying assembly 7 and a lifting assembly 8; the conveying component 7 is arranged on the bin body bracket 6 and used for placing and conveying the cover plate, and a lifting gap 71 is arranged on the conveying component 7; the lifting assembly 8 is matched at one end of the conveying assembly 7, a lifting plate 81 is arranged on the lifting assembly 8, and the lifting plate 81 moves in and out of the lifting gap 71.
When the cover plate is installed, the initial position of the lifting plate 81 is below the lifting gap 71, then the conveying assembly 7 conveys the cover plate to the lifting gap 71, at this time, the lifting assembly 8 lifts the lifting plate 81, and the lifting plate 81 supports the cover plate when passing through the lifting gap 71 and is lifted to a certain height so as to be clamped by the clamping assembly 4 of the dismounting mechanism 10. When the cover plate is detached, the lifting plate 81 is lifted to a certain height, then the clamping assembly 4 moves the detached cover plate onto the lifting plate 81, at this time, the lifting assembly 8 lowers the lifting plate 81, and when the lifting plate 81 passes through the lifting gap 71, the cover plate is placed on the conveying assembly 7 to be conveyed by the conveying assembly 7.
The conveying assembly 7 comprises a second driving member 72, two rollers 73, a supporting plate 74 and a conveyor belt 75; the second driving member 72 is mounted on the bin body bracket 6, in this embodiment, the second driving member 72 is a driving motor; the two rollers 73 are respectively arranged at the two ends of the bin body bracket 6; the supporting plate 74 is fixed on the bin body bracket 6 and is positioned between the two rollers 73; the conveyor belt 75 is sleeved on the bearing plate 74 and is in transmission connection with the two rollers 73 and the second driving member 72 respectively. When the lifting device is used, the driving motor rotates forwards or backwards to drive the driving belt to rotate forwards or backwards, so that the cover plate is conveyed towards the direction/the opposite direction of the lifting gap 71 in a matching mode.
The lifting assembly 8 comprises a third driving member 82, a sliding seat 83 and a sliding block 84; the third driving piece 82 and the sliding seat 83 are both arranged on the bin body bracket 6; the sliding block 84 is in sliding fit with the sliding seat 83 and is in transmission connection with the third driving piece 82; the lifting plate 81 is fixed to the slide block 84. In this embodiment, the third driving member 82 is a driving motor with a lead screw, and the sliding block 84 is mounted on the lead screw of the driving motor, and under the driving of the driving motor, the sliding block 84 moves up and down on the lead screw along the sliding seat 83, so as to cooperate with raising or lowering the raising plate 81 fixed on the sliding block 84.
The lifting assembly 8 further comprises two sets of calibration assemblies 85, wherein each calibration assembly 85 comprises a calibration plate 851, a second cylinder 852 and a positioning block 853; the second cylinder 852 is matched on the upper part of the bin body bracket 6; the correction plate 851 is installed on the piston rod of the second cylinder 852 and is movably fitted at one side of the lifting plate 81; the positioning block 853 is disposed opposite to the correction plate 851 and fitted to the other side of the lifting plate 81.
During the use, to placing the apron on lifting plate 81, its position deviation may appear, at this moment, can utilize the piston rod of second cylinder 852 to push out correcting plate 851, correcting plate 851 can be with lifting plate 81 on the apron promote, the top lean on locating piece 853, the cooperation of two sets of correcting component 85 can play the corrective action to the position of apron, and then the accurate dismouting of cooperation apron. The positioning block 853 is used for matching with the correction plate 851 to correct the cover plate, the positioning block 853 can be an independent part, and at the moment, the positioning block 853 is arranged at the upper part of the bin body bracket 6 and the side surface of the sliding block 84; of course, the positioning block 853 may be a side wall of the cartridge body holder 6 or a side wall of the slide block 84.
The bottom of the bin body bracket 6 is provided with a second wheel 61 and a second foot support 62 which can be rotatably adjusted. The second wheel 61 is arranged, so that the bin 30 can be conveniently moved, when the bin 30 needs to be moved, the second foot support 62 is rotated reversely to be away from the ground, and the second wheel 61 supports the dismounting and mounting rack 1; on the contrary, when the storage bin 30 needs to be matched with the cover plate to be disassembled and assembled, in order to ensure the stability of the storage bin 30, the second foot support 62 is rotated in the forward direction, so that the storage bin 30 is placed on the ground through the second foot support 62. Of course, the above-mentioned cabin body support 6 can also be mounted on an AGV. The moving and parking of the bin 30 are controlled by an AGV trolley, and the cover plate is further automatically disassembled and assembled. Guard plates 63 are further mounted on the bin body brackets 61 along both sides of the conveying assembly 7. The cover plate conveyed by the conveying assembly 7 is limited and prevented from falling off by the guard plate 63.
The foregoing description of the specific exemplary embodiments of the invention has been presented for the purposes of illustration and description and is not intended to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application, to thereby enable others skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as may be suited to the particular use contemplated and contemplated by those skilled in the art without departing from the scope of the invention.
Claims (10)
1. The utility model provides a apron automatic dismounting machine which characterized in that: the device comprises a disassembling and assembling mechanism, a control system and a storage bin for accommodating a cover plate; the disassembling and assembling mechanism comprises a disassembling and assembling rack, a three-axis moving mechanism, a connecting seat, a clamping assembly and a positioning assembly; the three-axis moving mechanism is arranged on the disassembling and assembling rack; the connecting seat is arranged on the three-axis moving mechanism and moves in the three-axis direction under the driving of the three-axis moving mechanism; the clamping assembly is arranged on the connecting seat and used for clamping and fixing the cover plate; the positioning assembly is arranged on the connecting seat and used for positioning the feeding position, the mounting position and the placing position of the cover plate; the control system is electrically connected with the disassembling and assembling mechanism and used for controlling the disassembling and assembling mechanism.
2. The automatic cover plate dismounting and mounting machine according to claim 1, wherein: the positioning assembly comprises a positioning support rod, a camera and a light supplement lamp; one end of the positioning support rod is fixed on the connecting seat; the camera is arranged at the other end of the positioning support rod; the light filling lamp is installed on the positioning support rod and used in cooperation with the camera.
3. The automatic cover plate dismounting and mounting machine according to claim 1, wherein: the clamping assembly comprises a clamping seat, a first driving piece, a transmission screw rod and two clamping plates; the clamping seat is fixed on the connecting seat; the first driving piece is arranged on the clamping seat; the transmission screw rod is in rotating fit with the clamping seat and is in transmission connection with the first driving piece; the two clamping plates are in transmission connection with the transmission screw rod and move in opposite directions or in reverse directions under the driving of the transmission screw rod.
4. The automatic cover plate dismounting and mounting machine according to claim 3, wherein: the clamping device is characterized in that a sliding rail is installed on the clamping seat, a sliding block is installed at one end, facing the clamping seat, of the clamping plate, and the clamping plate is in sliding fit with the sliding rail of the clamping seat through the sliding block.
5. The automatic cover plate dismounting and mounting machine according to claim 3, wherein: the clamping assembly further comprises a first air cylinder and a clamping plate, and the first air cylinder is mounted on the clamping plate; the clamping plate is installed on a piston rod of the first air cylinder and is driven by the first air cylinder to movably enter and exit the sinking platform.
6. The automatic cover plate dismounting and mounting machine according to claim 1, wherein: the bin comprises a bin body bracket, a conveying assembly and a lifting assembly; the conveying assembly is arranged on the bin body bracket and used for placing and conveying the cover plate, and a lifting gap is formed in the conveying assembly; the lifting assembly is matched with one end of the conveying assembly, a lifting plate is arranged on the lifting assembly, and the lifting plate movably enters and exits the lifting gap.
7. The automatic cover plate dismounting and mounting machine according to claim 6, wherein: the conveying assembly comprises a second driving piece, two rollers, a bearing plate and a conveying belt; the second driving piece is arranged on the bin body bracket; the two rollers are respectively arranged at two ends of the bin body bracket; the supporting plate is fixed on the bin body bracket and is positioned between the two rollers; the conveying belt is sleeved on the bearing plate and is in transmission connection with the two rollers and the second driving piece respectively.
8. The automatic cover plate dismounting and mounting machine according to claim 6, wherein: the lifting assembly comprises a third driving piece, a sliding seat and a sliding block; the third driving piece and the sliding seat are both arranged on the bin body bracket; the sliding block is in sliding fit with the sliding seat and is in transmission connection with the third driving piece; the lifting plate is fixed on the sliding block.
9. The automatic cover plate dismounting and mounting machine according to claim 6, wherein: the lifting assembly further comprises two groups of correction assemblies, and each correction assembly comprises a correction plate, a second cylinder and a positioning block; the second cylinder is matched with the upper part of the bin body bracket; the correcting plate is arranged on a piston rod of the second cylinder and is movably matched with one side of the lifting plate; the positioning block is arranged opposite to the correction plate and matched with the other side of the lifting plate.
10. The automatic cover plate dismounting and mounting machine according to claim 6, wherein: the disassembly and assembly rack is arranged on an AGV trolley, and the bin body support is arranged on the AGV trolley.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020656040.2U CN212043402U (en) | 2020-04-26 | 2020-04-26 | Automatic cover plate dismounting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020656040.2U CN212043402U (en) | 2020-04-26 | 2020-04-26 | Automatic cover plate dismounting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212043402U true CN212043402U (en) | 2020-12-01 |
Family
ID=73518772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020656040.2U Active CN212043402U (en) | 2020-04-26 | 2020-04-26 | Automatic cover plate dismounting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212043402U (en) |
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2020
- 2020-04-26 CN CN202020656040.2U patent/CN212043402U/en active Active
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