CN219740758U - Corrosion device with fixing mechanism - Google Patents
Corrosion device with fixing mechanism Download PDFInfo
- Publication number
- CN219740758U CN219740758U CN202320194724.9U CN202320194724U CN219740758U CN 219740758 U CN219740758 U CN 219740758U CN 202320194724 U CN202320194724 U CN 202320194724U CN 219740758 U CN219740758 U CN 219740758U
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- circuit board
- motor
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- box
- base
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- 230000007246 mechanism Effects 0.000 title claims abstract description 81
- 238000005260 corrosion Methods 0.000 title claims abstract description 21
- 230000007797 corrosion Effects 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 238000005530 etching Methods 0.000 claims abstract description 33
- 238000004140 cleaning Methods 0.000 claims description 22
- 239000002699 waste material Substances 0.000 claims description 15
- 239000010865 sewage Substances 0.000 claims description 10
- 230000000295 complement effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Landscapes
- Manufacturing Of Printed Circuit Boards (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The utility model relates to the technical field of circuit board production, in particular to a corrosion device with a fixing mechanism, which comprises a feeding mechanism, an auxiliary mechanism, a rotating mechanism and a discharging mechanism, wherein the auxiliary mechanism is arranged at the rear side of the feeding mechanism, the rotating mechanism is arranged at the upper side of the auxiliary mechanism, and the discharging mechanism is arranged at one side of the auxiliary mechanism; the beneficial effects are that: when the device etches the circuit board, the lifting motor drives the double-end air cylinder and the clamping plates to lift through the movable end and the connecting plate, the double-end air cylinder drives the clamping plates at two ends to stretch out and draw back, after the clamping plates clamp the circuit board, the main motor drives the rotating plate to rotate through the connecting sleeve and the rotating shaft, so that the lifting motor drives the clamping plates and the circuit board to rotate along with the rotating plate through the connecting plate and the double-end air cylinder, the circuit board can be automatically etched, cleaned and air-dried on the auxiliary mechanism, and the whole etching process avoids manual direct contact with the circuit board, thereby avoiding corrosive liquid from burning the skin of workers.
Description
Technical Field
The utility model relates to the technical field of circuit board production, in particular to a corrosion device with a fixing mechanism.
Background
The integrated circuit board is a carrier for carrying the integrated circuit, but often the integrated circuit board is also taken, and the integrated circuit board is mainly composed of silica gel, so the integrated circuit board is generally green, and a corrosion device is usually required to etch the surface of the integrated circuit board in the production process, so that the integrated circuit board is convenient for workers to carry out secondary use.
Patent number (CN 217789998U) discloses an integrated circuit production is with corroding device that possesses fixed establishment, and the device is including the barrel that is used for bearing corrosive liquid, and barrel top fixedly connected with is used for placing the back sheet of integrated circuit board, and the back sheet intermediate position is connected with the fly leaf through elevating gear, and a plurality of groups of fluting that run through have been seted up to the fly leaf inner wall. The device is through placing integrated circuit board on the fly leaf to inside leading-in barrel with the corrosive liquid, thereby realize the corrosion effect to the circuit board, when need take the circuit board, can open driving motor and then drive the threaded rod rotation, and drive the fly leaf and upwards move under the effect of screw thread, make the integrated circuit board can upwards move, thereby break away from the corrosive liquid top, this kind of mode can play fine ejection of compact effect, and can avoid the manual taking of staff, promoted the safety in utilization of device. The device can be automatically separated from the corrosive liquid after the circuit board is etched, so that workers are prevented from being directly immersed in the corrosive liquid to take the circuit board, but the circuit board still needs to be manually taken out of the movable plate by the workers after the circuit board is separated from the corrosive liquid, the circuit board is not cleaned, part of the corrosive liquid still remains on the surface of the circuit board, and the corrosive liquid still can burn the skin of the workers.
Disclosure of Invention
The present utility model has been made to solve the above-described problems, and an object of the present utility model is to provide an etching apparatus including a fixing mechanism.
The utility model realizes the above purpose through the following technical scheme:
the utility model provides a corrosion device that possesses fixed establishment, includes feed mechanism, complementary unit, rotary mechanism and unloading mechanism, the feed mechanism rear side is provided with complementary unit, complementary unit installs the upside rotary mechanism, complementary unit one side is provided with unloading mechanism, rotary mechanism includes main motor, motor base, adapter sleeve, pivot, revolving plate, elevator motor, connecting plate, double-end cylinder and splint, the motor base inner circle is fixed with main motor, main motor upper end cover has the adapter sleeve, the adapter sleeve upper end is connected with the pivot, the pivot upper end is fixed with the revolving plate, the revolving plate outer lane evenly installs four elevator motor, the elevator motor lower extreme is connected with the connecting plate, connecting plate lower surface fixation has the double-end cylinder, double-end cylinder both ends are connected with splint.
Preferably, the inner ring of the rotating plate is round, the outer ring is cross-shaped, the movable end of the lifting motor is in sliding connection with the outer ring of the rotating plate, and the clamping plate is made of corrosion-resistant materials.
Preferably, the feeding mechanism comprises a first supporting plate, a first driving motor, a first conveyor belt, a fixing belt, a supporting base and a limiting base, wherein a plurality of first supporting plates are arranged on the front side of the auxiliary mechanism, the upper ends of the first supporting plates are connected with the first conveyor belt through driving rollers, the first driving motor is arranged at the front ends of the driving rollers at one ends, the fixing belts are symmetrically arranged on the front side and the rear side of the first conveyor belt, the supporting base is fixed in the fixing belts, and the limiting base is arranged at the upper ends of the supporting base through bolts; the fixing belt and the first conveyor belt are integrally formed, and the support base is an L-shaped base.
Preferably, the auxiliary mechanism comprises a workbench, an etching box, a waste liquid pipe, a first electromagnetic valve, a collecting box, a cleaning box, a second electromagnetic valve, a drain pipe, a sewage tank, a mounting base and an air dryer, wherein the etching box is fixed on one side of the upper surface of the workbench, the etching box is far away from one side of the workbench and is connected with the waste liquid pipe, the outer ring of the waste liquid pipe is provided with the first electromagnetic valve, the other end of the waste liquid pipe is provided with the collecting box, the rear side of the upper surface of the workbench is fixed with the cleaning box, the drain pipe is provided with the drain pipe, the second electromagnetic valve is arranged on the outer ring of the drain pipe, the sewage tank is placed on the rear side of the collecting box, the mounting base is welded on the rear side of the cleaning box, and the air dryer is mounted on the upper end of the mounting base.
Preferably, one end of the drain pipe is connected with the cleaning box, the other end of the drain pipe stretches into the sewage tank, and the etching box and the cleaning box are made of corrosion-resistant materials.
Preferably, the blanking mechanism comprises a second supporting plate, a driving roller, a driven roller, a second conveyor belt and a second servo motor, wherein the second supporting plate is arranged front and back, the upper end of the second supporting plate at the front side is connected with the driving roller, the upper end of the second supporting plate at the rear side is connected with the driven roller, the outer rings of the driving roller and the driven roller are sleeved with the second conveyor belt, and one side of the driving roller is provided with the second servo motor; the second conveyor belt is also uniformly provided with the fixing belt, the supporting base and the limiting base.
The beneficial effects are that: through setting up slewing mechanism, when making the device carry out the etching to the circuit board, elevator motor drives double-end cylinder and splint through expansion end and connecting plate and goes up and down, double-end cylinder drives both ends splint and stretches out and draws back, after splint clamp circuit board, main motor drives the commentaries on classics board through adapter sleeve and pivot and rotates, make elevator motor drive splint and circuit board and follow the commentaries on classics board and rotate through connecting plate and double-end cylinder, make the circuit board can etch on auxiliary mechanism automatically, wash and air-dry, whole etching process has avoided artifical direct contact circuit board, thereby avoided corrosive liquids to burn workman skin.
Drawings
FIG. 1 is a schematic view of a corrosion apparatus with a securing mechanism according to the present utility model;
FIG. 2 is a schematic structural view of a feeding mechanism of the corrosion device with a fixing mechanism according to the present utility model;
FIG. 3 is a schematic view of an auxiliary mechanism of the corrosion apparatus with a fixing mechanism according to the present utility model;
FIG. 4 is a schematic view of a rotating mechanism of a corrosion apparatus with a fixing mechanism according to the present utility model;
fig. 5 is a schematic structural view of a blanking mechanism of the corrosion apparatus with a fixing mechanism according to the present utility model.
Reference numerals illustrate:
1. a feeding mechanism; 2. an auxiliary mechanism; 3. a rotating mechanism; 4. a blanking mechanism; 101. a first support plate; 102. a first driving motor; 103. a first conveyor belt; 104. a fixing belt; 105. a support base; 106. a limit base; 201. a work table; 202. an etching box; 203. a waste liquid pipe; 204. a first electromagnetic valve; 205. a collection box; 206. a cleaning box; 207. a second electromagnetic valve; 208. a drain pipe; 209. a sewage tank; 210. a mounting base; 211. an air dryer; 301. a main motor; 302. a motor base; 303. connecting sleeves; 304. a rotating shaft; 305. a rotating plate; 306. a lifting motor; 307. a connecting plate; 308. a double-headed cylinder; 309. a clamping plate; 401. a second support plate; 402. a drive roll; 403. driven roller; 404. a second conveyor belt; 405. and a second servo motor.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
as shown in fig. 1 to 5, the corrosion device with the fixing mechanism comprises a feeding mechanism 1, an auxiliary mechanism 2, a rotating mechanism 3 and a discharging mechanism 4, wherein the auxiliary mechanism 2 is arranged at the rear side of the feeding mechanism 1, the rotating mechanism 3 is arranged at the upper side of the auxiliary mechanism 2, and the discharging mechanism 4 is arranged at one side of the auxiliary mechanism 2;
in this embodiment: the feeding mechanism 1 comprises a first supporting plate 101, a first driving motor 102, a first conveying belt 103, a fixing belt 104, a supporting base 105 and a limiting base 106, wherein a plurality of first supporting plates 101 are arranged on the front side of the auxiliary mechanism 2, the upper ends of the first supporting plates 101 are connected with the first conveying belt 103 through driving rollers, the first driving motor 102 is arranged at the front ends of driving rollers at one ends, the fixing belts 104 are symmetrically arranged on the surfaces of the front side and the rear side of the first conveying belt 103, the supporting base 105 is fixed in the fixing belts 104, the limiting bases 106 are arranged at the upper ends of the supporting bases 105 through bolts, and later workers can conveniently replace different limiting bases 106 according to different circuit boards; wherein the fixing belt 104 and the first conveyor belt 103 are integrally formed, and the supporting base 105 is an L-shaped base; through setting up feed mechanism 1, when making the device carry out the etching to the circuit board, the circuit board that external needs the etching is constantly placed in spacing base 106 on first conveyer belt 103, then first driving motor 102 drives first conveyer belt 103 through the driving roller and rotates, makes first conveyer belt 103 drive the circuit board to the splint 309 department of one end remove to realize the automatic feeding of device.
In this embodiment: the auxiliary mechanism 2 comprises a workbench 201, an etching box 202, a waste liquid pipe 203, a first electromagnetic valve 204, a collecting box 205, a cleaning box 206, a second electromagnetic valve 207, a drain pipe 208, a sewage tank 209, a mounting base 210 and an air dryer 211, wherein the etching box 202 is fixed on one side of the upper surface of the workbench 201, the waste liquid pipe 203 is connected to one side of the etching box 202 far away from the workbench 201, the first electromagnetic valve 204 is mounted on the outer ring of the waste liquid pipe 203, the collecting box 205 is arranged on the other end of the waste liquid pipe 203, the cleaning box 206 is fixed on the rear side of the upper surface of the workbench 201, the etching box 202 and the cleaning box 206 are made of corrosion-resistant materials, the drain pipe 208 is arranged on the rear side of the waste liquid pipe 203, one end of the drain pipe 208 is connected with the cleaning box 206, the second electromagnetic valve 207 is mounted on the outer ring of the drain pipe 208, the sewage tank 209 is placed on the rear side of the collecting box 205, the lower end of the drain pipe 208 stretches into the sewage tank 209, the mounting base 210 is welded on the rear side of the cleaning box 206, and the air dryer 211 is mounted on the upper end of the mounting base 210. Through setting up assist mechanism 2, when making the device carry out the etching to the circuit board, will need the corrosive liquid that uses pour into etching box 202 in to pour into the washing liquid into to wasing box 206, make the circuit board submergence etch in the corrosive liquid, then submerge the residual corrosive liquid on the washing circuit board in the washing liquid again, avoid residual corrosive liquid to continue corroding the circuit board and burn staff, air dryer 211 air-dries the circuit board at last, and the circuit board of being convenient for carries out next step process.
In this embodiment: the rotating mechanism 3 comprises a main motor 301, a motor base 302, a connecting sleeve 303, a rotating shaft 304, a rotating plate 305, a lifting motor 306, a connecting plate 307, a double-head cylinder 308 and a clamping plate 309, wherein the main motor 301 is fixed on the inner ring of the motor base 302, the connecting sleeve 303 is sleeved at the upper end of the main motor 301, the rotating shaft 304 is connected with the rotating shaft 304, the rotating plate 305 is fixed at the upper end of the rotating shaft 304, the inner ring of the rotating plate 305 is circular, the outer ring of the rotating plate 305 is cross-shaped, four lifting motors 306 are uniformly arranged on the outer ring of the rotating plate 305, the movable end of the lifting motor 306 is in sliding connection with the outer ring of the rotating plate 305, the lower end of the lifting motor 306 is connected with the connecting plate 307, the double-head cylinder 308 is fixed on the lower surface of the connecting plate 307, the two ends of the double-head cylinder 308 are connected with the clamping plate 309, and the clamping plate 309 is made of corrosion-resistant materials; through setting up rotary mechanism 3, when making the device carry out the etching to the circuit board, elevator motor 306 drives double-end cylinder 308 through expansion end and connecting plate 307 and descends, then double-end cylinder 308 drives both ends splint 309 through the expansion end shrink, thereby press from both sides tight circuit board, then main motor 301 drives through adapter sleeve 303 and pivot 304 and links the rotating plate 305 and rotate, make the circuit board follow rotating plate 305 through elevator motor 306 and double-end cylinder 308 and rotate, make the circuit board can carry out the etching automatically on auxiliary mechanism 2, wash and air-dry, whole etching process has avoided artifical direct contact circuit board, thereby avoided corrosive liquids to burn workman's skin.
In this embodiment: the blanking mechanism 4 comprises a second supporting plate 401, a driving roller 402, a driven roller 403, a second conveyor belt 404 and a second servo motor 405, wherein the second supporting plate 401 is arranged front and back, the upper end of the front side second supporting plate 401 is connected with the driving roller 402, the upper end of the rear side second supporting plate 401 is connected with the driven roller 403, the outer rings of the driving roller 402 and the driven roller 403 are sleeved with the second conveyor belt 404, and one side of the driving roller 402 is provided with the second servo motor 405; the second conveyor belt 404 is also uniformly provided with a fixing belt 104, a supporting base 105 and a limiting base 106; through setting up unloading mechanism 4, make spacing base 106 on the second conveyer belt 404 place the circuit board after, second servo motor 405 drives second servo motor 405 through drive roll 402 and rotates, makes second servo motor 405 drive the circuit board on the spacing base 106 and removes to the next process in to realize the automatic unloading of device.
In the above structure, when the device is required to etch the circuit board, firstly, the limit base 106 with the size matched with the circuit board is fixed on the support base 105 through bolts, then the corrosive liquid required to be used is poured into the etching box 202, and the cleaning liquid is injected into the cleaning box 206, then the circuit board required to be etched from the outside is continuously placed in the limit base 106 on the first conveyor 103, then the lifting motor 306 above the first conveyor 103 is started, the lifting motor 306 drives the double-headed cylinder 308 to descend through the movable end and the connecting plate 307, when the clamping plates 309 at the two ends of the double-headed cylinder 308 descend to the circuit board, the double-headed cylinder 308 is started to drive the two end clamping plates 309 to shrink through the movable end, so as to clamp the circuit board, then the lifting motor 306 drives the double-headed cylinder 308 and the circuit board to ascend through the movable end connecting plate 307, then the main motor 301 is started, the main motor 301 drives the rotating shaft 304 to rotate through the connecting sleeve 303, the rotating plate 305 rotates along with the rotating shaft 304, the clamping plate 309 with the circuit board clamped is rotated above the etching box 202, then the lifting motor 306 is started, the lifting motor 306 drives the clamping plate 309 and the circuit board to descend through the movable end and the connecting plate 307, the circuit board is immersed in the corrosive liquid, after the circuit board is etched, the lifting motor 306 drives the clamping plate 309 and the circuit board to ascend through the movable end and the connecting plate 307 again, the circuit board is separated from the corrosive liquid, then the main motor 301 is continuously started, the main motor 301 drives the rotating plate 305 to rotate through the connecting sleeve 303 and the rotating shaft 304, the etched circuit board is rotated above the cleaning box 206, then the action of the etching box 202 is repeated, the circuit board is immersed in the cleaning liquid which is remained on the circuit board, the corrosive liquid is prevented from continuously corroding the circuit board and burning workers, after the circuit board is cleaned, the lifting motor 306 drives the clamping plate 309 and the circuit board to ascend, meanwhile, the air dryer 211 air-dries the circuit board, the air-dried circuit board continues to rotate to the blanking mechanism 4 through the driving of the main motor 301, when the circuit board rotates to the second conveying belt 404, the lifting motor 306 drives the clamping plate 309 and the circuit board to descend through the connecting plate 307 and the double-head air cylinder 308, and the circuit board is placed in the limit base 106 on the second conveying belt 404, so that automatic etching and automatic feeding and discharging of the device are realized, and etching efficiency of the device is greatly improved. When the corrosive liquid and the cleaning liquid need to be replaced, the first electromagnetic valve 204 and the second electromagnetic valve 207 are opened, so that the corrosive liquid is discharged into the collecting box 205 through the waste liquid pipe 203, the cleaning liquid is discharged into the sewage box 209 through the drain pipe 208, and the corrosive liquid does not need to be manually contacted in the whole process, so that workers are prevented from being burnt by the corrosive liquid.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and their equivalents.
Claims (6)
1. A corrosion apparatus having a fixing mechanism, characterized in that: including feed mechanism (1), complementary unit (2), rotary mechanism (3) and unloading mechanism (4), feed mechanism (1) rear side is provided with complementary unit (2), complementary unit (2) upside is installed rotary mechanism (3), complementary unit (2) one side is provided with unloading mechanism (4), rotary mechanism (3) include main motor (301), motor base (302), adapter sleeve (303), pivot (304), revolving plate (305), elevator motor (306), connecting plate (307), double-end cylinder (308) and splint (309), motor base (302) inner circle is fixed with main motor (301), main motor (301) upper end cover has adapter sleeve (303), adapter sleeve (303) upper end is connected with pivot (304), pivot (304) upper end is fixed with revolving plate (305), revolving plate (305) outer lane evenly installs four elevator motor (306), elevator motor (306) lower extreme is connected with connecting plate (307), double-end cylinder (308) have both ends (308) fixed surface connection splint.
2. The etching apparatus having a fixing mechanism according to claim 1, wherein: the inner ring of the rotating plate (305) is round, the outer ring is cross-shaped, the movable end of the lifting motor (306) is in sliding connection with the outer ring of the rotating plate (305), and the clamping plate (309) is made of corrosion-resistant materials.
3. The etching apparatus having a fixing mechanism according to claim 2, wherein: the feeding mechanism (1) comprises a first supporting plate (101), a first driving motor (102), a first conveying belt (103), fixing belts (104), supporting bases (105) and limiting bases (106), wherein a plurality of first supporting plates (101) are arranged on the front side of the auxiliary mechanism (2), the upper ends of the first supporting plates (101) are connected with the first conveying belts (103) through driving rollers, the front ends of the driving rollers at one ends are provided with the first driving motor (102), the fixing belts (104) are symmetrically arranged on the front side and the rear side of the first conveying belts (103), the supporting bases (105) are fixed in the fixing belts (104), and the limiting bases (106) are arranged at the upper ends of the supporting bases (105) through bolts; the fixing belt (104) and the first conveying belt (103) are integrally formed, and the supporting base (105) is an L-shaped base.
4. A corrosion apparatus with a fixing mechanism according to claim 3, wherein: the auxiliary mechanism (2) comprises a workbench (201), an etching box (202), a waste liquid pipe (203), a first electromagnetic valve (204), a collecting box (205), a cleaning box (206), a second electromagnetic valve (207), a drain pipe (208), a sewage tank (209), a mounting base (210) and an air dryer (211), wherein one side of the upper surface of the workbench (201) is fixedly provided with the etching box (202), the etching box (202) is far away from one side of the workbench (201) and is connected with the waste liquid pipe (203), the first electromagnetic valve (204) is arranged on the outer ring of the waste liquid pipe (203), the other end of the waste liquid pipe (203) is provided with the collecting box (205), the rear side of the upper surface of the workbench (201) is fixedly provided with the cleaning box (206), the outer ring of the drain pipe (208) is provided with the second electromagnetic valve (207), the rear side of the collecting box (205) is provided with the box (209), the rear side of the cleaning box (206) is welded with the base (210), and the mounting base (211) is provided with the air dryer.
5. The etching apparatus having a fixing mechanism according to claim 4, wherein: one end of the drain pipe (208) is connected with the cleaning box (206), the other end of the drain pipe (208) stretches into the sewage tank (209), and the etching box (202) and the cleaning box (206) are made of corrosion-resistant materials.
6. The etching apparatus having a fixing mechanism according to claim 5, wherein: the blanking mechanism (4) comprises a second supporting plate (401), a driving roller (402), a driven roller (403), a second conveyor belt (404) and a second servo motor (405), wherein the second supporting plate (401) is arranged front and back, the driving roller (402) is connected to the upper end of the second supporting plate (401) on the front side, the driven roller (403) is connected to the upper end of the second supporting plate (401) on the rear side, the second conveyor belt (404) is sleeved on the outer ring of the driving roller (402) and the outer ring of the driven roller (403), and the second servo motor (405) is arranged on one side of the driving roller (402); the second conveyor belt (404) is also uniformly provided with the fixing belt (104), the supporting base (105) and the limiting base (106).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320194724.9U CN219740758U (en) | 2023-02-13 | 2023-02-13 | Corrosion device with fixing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320194724.9U CN219740758U (en) | 2023-02-13 | 2023-02-13 | Corrosion device with fixing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219740758U true CN219740758U (en) | 2023-09-22 |
Family
ID=88025333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320194724.9U Active CN219740758U (en) | 2023-02-13 | 2023-02-13 | Corrosion device with fixing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219740758U (en) |
-
2023
- 2023-02-13 CN CN202320194724.9U patent/CN219740758U/en active Active
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