CN219832752U - Battery cell winding device - Google Patents
Battery cell winding device Download PDFInfo
- Publication number
- CN219832752U CN219832752U CN202320381638.9U CN202320381638U CN219832752U CN 219832752 U CN219832752 U CN 219832752U CN 202320381638 U CN202320381638 U CN 202320381638U CN 219832752 U CN219832752 U CN 219832752U
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- fixing frame
- disc
- roller
- fixing
- winding device
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- 238000004804 winding Methods 0.000 title claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 85
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims 1
- 238000005096 rolling process Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 8
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Secondary Cells (AREA)
Abstract
The utility model relates to a cell winding device, which comprises: the device comprises a fixing frame, an unreeling mechanism, a tensioning mechanism, a reeling mechanism and a driving mechanism, wherein the unreeling mechanism, the tensioning mechanism, the reeling mechanism and the driving mechanism are connected with the fixing frame, the unreeling mechanism is positioned at the front part of the fixing frame, the tensioning mechanism is positioned at the middle part of the fixing frame, the reeling mechanism and the driving mechanism are positioned at the rear part of the fixing frame, and the driving mechanism is connected with the reeling mechanism; the winding mechanism comprises three rotating drums which are detachably connected, and the three rotating drums are all installed on the fixing frame through bearing seats and are connected with the driving mechanism. According to the utility model, the detachable rotary drum is arranged, and the linear speed of rotation of the rotary drum is adjusted by changing the rotary drums with different diameters, so that the positive plate, the diaphragm and the negative plate can be synchronously recovered. And the compensation roller connected with the extension plate is arranged to flatten and tension the battery cell, so that the rolling consistency is ensured. The distance-adjustable two fixing sheets are arranged, and the battery cores with different sizes and shapes are installed, so that the adaptability is high.
Description
Technical Field
The utility model belongs to the technical field of battery cells, and particularly relates to a battery cell winding device.
Background
The battery cell is an electric storage part in the rechargeable battery, the quality of the rechargeable battery is determined, and the battery cell is formed by laminating a positive plate coated with lithium ions, a diaphragm and a negative plate coated with graphite and then winding the laminated positive plate and the laminated negative plate by a winding machine; in order to respond to the national energy-saving and environment-friendly policy, the pole pieces in the battery core need to be recovered, but the pole piece diaphragms in the battery core are staggered and continuous, so that the pole pieces are difficult to separate. In the tradition, generally adopt manual unreeling's mode to retrieve, not only extravagant manpower, and the inside chemistry of battery easily causes the injury to the human body, to this, designed mechanized recovery unit on the market and be used for retrieving the electric core. However, the positive electrode sheet, the negative electrode sheet and the separator of the battery cell need to be recovered respectively, and when the recovery device is used for actual recovery, the problem that the recovery of the positive electrode sheet, the negative electrode sheet and the separator is not synchronous often occurs, so that the efficiency is reduced.
Disclosure of Invention
The utility model aims to provide a battery core winding device for solving the technical problems in the background technology.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a cell winding device, comprising: the device comprises a fixing frame, an unreeling mechanism, a tensioning mechanism, a reeling mechanism and a driving mechanism, wherein the unreeling mechanism, the tensioning mechanism, the reeling mechanism and the driving mechanism are connected with the fixing frame, the unreeling mechanism is positioned at the front part of the fixing frame, the tensioning mechanism is positioned at the middle part of the fixing frame, the reeling mechanism and the driving mechanism are positioned at the rear part of the fixing frame, and the driving mechanism is connected with the reeling mechanism;
the winding mechanism comprises three detachably connected rotating drums, and the three rotating drums are all arranged on the fixing frame through bearing seats and are connected with the driving mechanism; the three rotating drums are respectively used for winding the positive electrode plate, the diaphragm and the negative electrode plate of the battery cell.
As a further improvement of the utility model, each rotary drum comprises a rotary shaft and a roller coaxially sleeved on the rotary shaft; the middle part of the rotating shaft is provided with a plurality of protruding arc-shaped sheets, a first spring is arranged between the bottom of each arc-shaped sheet and the outer wall of the rotating shaft, and the inner wall of the roller is in contact with the arc-shaped sheets.
As a further improvement of the utility model, the unreeling mechanism comprises a driven shaft, a disc, two fixing sheets and an adjusting component for adjusting the distance between the two fixing sheets; the driven shaft is arranged on the fixing frame through a bearing seat, the end part of the driven shaft is connected with one side of the disc, two fixing pieces are arranged on the other side of the disc, and the two fixing pieces are used for fixing the battery cell.
As a further improvement of the utility model, the adjusting component comprises a connecting shaft arranged at the end part of the fixing piece, two object placing grooves which are arranged on the disc and are matched with the two connecting shafts, and an adjusting frame arranged at one side of the disc; the adjusting frame is trapezoid with an opening at the lower end, and long-strip-shaped grooves are formed in the side frames at the two sides; the two connecting shafts respectively penetrate through the storage groove and the groove and are fixed through nuts.
As a further improvement of the utility model, the upper part of the adjusting frame is provided with a locking block; the adjusting component further comprises a screw, the lower end of the screw is connected with the driven shaft, the upper portion of the screw penetrates through the locking block and is fixed through a nut, a second spring is sleeved on the screw, and the top and the bottom of the spring are respectively abutted to the lower portion of the locking block and the outer wall of the driven shaft.
As a further improvement of the utility model, the tensioning mechanism comprises two compensation rollers, one passing roller and two clamping rollers from front to back in sequence; the two ends of the compensation roller positioned above are respectively provided with an extension plate extending upwards and backwards, the end parts of the extension plates are connected with the fixing frame through bolts, and the other two ends of the compensation roller, the passing roller and the two clamping rollers are respectively connected with the fixing frame through bolts.
As a further improvement of the utility model, the middle part of the fixing frame is provided with two vertical frames which are respectively positioned at the left side and the right side of the fixing frame; the extension plate, the other compensation roller, the passing roller and the two clamping rollers are respectively connected with the two vertical frames through bolts.
As a further improvement of the utility model, the driving mechanism comprises three motors, and the output shafts of the three motors are respectively connected with the three drums;
or, the driving mechanism comprises a motor and two transmission assemblies, wherein the motor is connected with any one rotary drum, and the other two rotary drums are connected with the motor through the transmission assemblies.
As a further development of the utility model, the transmission assembly comprises a belt.
As a further improvement of the utility model, a locking disc is arranged on the rotating shaft, a fixed disc is arranged at the end part of the roller, and the fixed disc is propped against the locking disc.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
according to the utility model, the detachable rotary drum is arranged, and the linear speed of rotation of the rotary drum is adjusted by changing the rotary drums with different diameters, so that the positive plate, the diaphragm and the negative plate can be synchronously recovered. And the compensation roller connected with the extension plate is arranged to flatten and tension the battery cell, so that the rolling consistency is ensured. The distance-adjustable two fixing sheets are arranged, and the battery cores with different sizes and shapes are installed, so that the adaptability is high.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
fig. 2 is an enlarged view of a portion a of fig. 1;
FIG. 3 is a schematic view of the structure of the drum of the present utility model;
fig. 4 is a schematic view of the structure of the present utility model in use.
The figure indicates: 1. the device comprises a fixing frame, 1-2 parts, a vertical frame, 2 parts, an unreeling mechanism, 2-1 parts, a driven shaft, 2-2 parts, a disc, 2-21 parts, a storage groove, 2-3 parts, a fixing piece, 2-31 parts, a connecting shaft, 2-4 parts, an adjusting frame, 2-41 parts, a slot, 2-42 parts, a locking block, 2-5 parts, a screw, 2-6 parts, a second spring, 3 parts, a tensioning mechanism, 3-1 parts, a compensating roller, 3-2 parts, a passing roller, 3-3 parts, a clamping roller, 3-4 parts, an extending plate, 4 parts, a reeling mechanism, 4-1 parts, a rotary drum, 4-11 parts, a rotary shaft, 4-12 parts, a roller, 4-13 parts, an arc-shaped piece, 4-14 parts, a first spring, 4-15 parts, a locking disc, 4-16 parts, a fixing disc, 5 parts, a driving mechanism, 5-1 parts, a motor, 5-2 parts, a belt, 6 parts, a bearing seat, 7 parts, a battery core, 8 parts and nuts.
Detailed Description
The present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which the objects, structures, and functions of the utility model are shown.
A cell 7 winding device as shown in fig. 1-4, comprising: the device comprises a fixing frame 1, an unreeling mechanism 2, a tensioning mechanism 3, a reeling mechanism 4 and a driving mechanism 5, wherein the unreeling mechanism 2, the tensioning mechanism 3, the reeling mechanism 4 and the driving mechanism 5 are connected with the fixing frame 1, the unreeling mechanism 2 is positioned at the front part of the fixing frame 1, the tensioning mechanism 3 is positioned at the middle part of the fixing frame 1, the reeling mechanism 4 and the driving mechanism 5 are positioned at the rear part of the fixing frame 1, and the driving mechanism 5 is connected with the reeling mechanism 4; the battery core 7 of the old battery is fixed on the unreeling mechanism 2 and is wound on the reeling mechanism 4 through the tensioning mechanism 3.
In this embodiment, the unreeling mechanism 2 comprises a driven shaft 2-1, a disc 2-2, two fixing pieces 2-3 and an adjusting component for adjusting the distance between the two fixing pieces 2-3; the driven shaft 2-1 is mounted on the fixed frame 1 through a bearing seat 6, the end of the driven shaft is connected with one side of the disc 2-2, two fixing pieces 2-3 are arranged on the other side of the disc 2-2, and the two fixing pieces 2-3 are used for fixing the battery cells 7. The electric core 7 is inserted into the two fixing plates 2-3, namely, the electric core 7 is supported by the two fixing plates 2-3, the electric core 7 is wound on the winding mechanism 4 through the tensioning mechanism 3, and when the winding mechanism 4 rotates, the rotating force acts on the driven shaft 2-1 through the electric core 7, so that the fixing plates 2-3 rotate along with the driven shaft 2-1, and the electric core 7 is separated from the fixing plates 2-3 layer by layer. The position between the two fixing sheets 2-3 can be adjusted, so that the battery cells 7 with different sizes and shapes can be installed, and the adaptability is stronger.
As shown in fig. 2, the adjusting assembly comprises a connecting shaft 2-31 arranged at the end part of the fixing piece 2-3, two storage grooves 2-21 arranged on the disc 2-2 and matched with the two connecting shafts 2-31, and an adjusting frame 2-4 arranged at one side of the disc 2-2; the adjusting frame 2-4 is trapezoid with an opening at the lower end, and long-strip-shaped grooves 2-41 are formed in the side frames at two sides; the two connecting shafts 2-31 respectively penetrate through the storage grooves 2-21 and the grooves 2-41 and are fixed through nuts 8. When in use, the connecting shaft 2-31 is sequentially penetrated into the storage groove 2-21 and the slot 2-41, the battery cell 7 is sleeved on the two fixing plates 2-3, the height of the adjusting frame 2-4 is adjusted, the fixing plates 2-3 tightly support the nut 8, the connecting shaft 2-31 is fixed by the nut 8, and external threads are arranged on the connecting shaft 2-31. In addition, the upper part of the adjusting frame 2-4 is provided with a locking block 2-42; the adjusting assembly further comprises a screw rod 2-5, the lower end of the screw rod 2-5 is connected with the driven shaft 2-1, the upper portion of the screw rod passes through the locking block 2-42 and is fixed through a nut 8, a spring II 2-6 is sleeved on the screw rod 2-5, and the top and the bottom of the spring respectively prop against the lower portion of the locking block 2-42 and the outer wall of the driven shaft 2-1; the position of the locking block 2-42 is fixed by the nut 8, and a triangular stable structure is formed by the locking block and the nut 8 at the connecting shaft 2-31, so that the fixing piece 2-3 is more stably installed.
Further, the tensioning mechanism 3 sequentially comprises two compensation rollers 3-1, one passing roller 3-2 and two clamping rollers 3-3 from front to back; the two ends of the compensation roller 3-1 positioned above are respectively provided with an extension plate 3-4 extending upwards and backwards, the end part of the extension plate 3-4 is connected with the fixing frame 1 through bolts, and the other two ends of the compensation roller 3-1, the passing roller 3-2 and the two clamping rollers 3-3 are respectively connected with the fixing frame 1 through bolts. The battery cell 7 sequentially passes through the middle of the two compensation rollers 3-1, the upper part of the passing roller 3-2 and the middle of the two clamping rollers 3-3 and then is connected with the winding mechanism 4; the compensating roller 3-1 connected with the extending plate 3-4 compresses the battery cell 7 under the action of gravity and is matched with the passing roller 3-2 for use, so that the battery cell 7 has tension, and the battery cell 7 is convenient to recover. For easy installation, the middle part of the fixing frame 1 is provided with two vertical frames 1-2, and the two vertical frames 1-2 are respectively positioned at the left side and the right side of the fixing frame 1; the extension plate 3-4, the other compensation roller 3-1, the passing roller 3-2 and the two clamping rollers 3-3 are respectively connected with the two vertical frames 1-2 through bolts.
The winding mechanism 4 comprises three detachably connected rotary drums 4-1, and the three rotary drums 4-1 are all arranged on the fixed frame 1 through bearing seats 6 and are connected with the driving mechanism 5; the three drums 4-1 are used for winding the positive electrode sheet, the separator and the negative electrode sheet of the battery cell 7, respectively. Because the distances between the three rotary drums 4-1 and the clamping roller 3-3 are inconsistent, the detachable rotary drum 4-1 is arranged, the diameter of the rotary drum 4-1 is adjusted, and then the linear speed of the rotary drum 4-1 is adjusted, so that the positive plate, the diaphragm and the negative plate can be synchronously recycled to the connected rotary drum 4-1. As shown in fig. 3, each rotary drum 4-1 comprises a rotary shaft 4-11 and a roller 4-12 coaxially sleeved on the rotary shaft 4-11; the middle part of the rotating shaft 4-11 is provided with a plurality of raised arc-shaped sheets 4-13, a first spring 4-14 is arranged between the bottom of each arc-shaped sheet 4-13 and the outer wall of the rotating shaft 4-11, and the inner wall of the roller 4-12 is in contact with the arc-shaped sheets 4-13; when the roller 4-12 is sleeved on the rotating shaft 4-11, the inside of the roller 4-12 is expanded under the action of the arc-shaped piece 4-13 and the first spring 4-14, so that the roller 4-12 is prevented from slipping when rotating along with the rotating shaft 4-11. And a locking disc 4-15 is arranged on the rotating shaft 4-11, a fixed disc 4-16 is arranged at the end part of the roller 4-12, and the fixed disc 4-16 is propped against the locking disc 4-15.
Specifically, the driving mechanism 5 comprises three motors 5-1, and output shafts of the three motors 5-1 are respectively connected with the three drums 4-1; or, the driving mechanism 5 comprises a motor 5-1 and two transmission assemblies, the motor 5-1 is connected with any one rotary drum 4-1, the other two rotary drums 4-1 are connected with the motor through the transmission assemblies, and the transmission assemblies comprise belts 5-2. With the three motors 5-1, the linear speed of the drum 4-1 can be adjusted by adjusting the speed at which the motors 5-1 rotate.
It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides a electricity core coiling mechanism which characterized in that: it comprises the following steps: the device comprises a fixing frame (1), an unreeling mechanism (2), a tensioning mechanism (3), a reeling mechanism (4) and a driving mechanism (5), wherein the unreeling mechanism (2) is connected with the fixing frame (1), the unreeling mechanism (2) is positioned at the front part of the fixing frame (1), the tensioning mechanism (3) is positioned at the middle part of the fixing frame (1), the reeling mechanism (4) and the driving mechanism (5) are positioned at the rear part of the fixing frame (1), and the driving mechanism (5) is connected with the reeling mechanism (4);
the winding mechanism (4) comprises three detachably connected rotary drums (4-1), and the three rotary drums (4-1) are all arranged on the fixed frame (1) through bearing blocks (6) and are connected with the driving mechanism (5); the three rotating drums (4-1) are respectively used for winding the positive plate, the diaphragm and the negative plate of the battery cell (7).
2. A cell winding device according to claim 1, wherein: each rotary drum (4-1) comprises a rotary shaft (4-11) and a roller (4-12) coaxially sleeved on the rotary shaft (4-11); the middle part of the rotating shaft (4-11) is provided with a plurality of protruding arc-shaped sheets (4-13), a first spring (4-14) is arranged between the bottom of each arc-shaped sheet (4-13) and the outer wall of the rotating shaft (4-11), and the inner wall of the roller (4-12) is in contact with the arc-shaped sheets (4-13).
3. A cell winding device according to claim 1, wherein: the unreeling mechanism (2) comprises a driven shaft (2-1), a disc (2-2), two fixing pieces (2-3) and an adjusting component for adjusting the distance between the two fixing pieces (2-3); the driven shaft (2-1) is mounted on the fixing frame (1) through a bearing seat (6), the end of the driven shaft is connected with one side of the disc (2-2), two fixing pieces (2-3) are arranged on the other side of the disc (2-2), and the two fixing pieces (2-3) are used for fixing the battery cells (7).
4. A cell winding device according to claim 3, wherein: the adjusting component comprises a connecting shaft (2-31) arranged at the end part of the fixing piece (2-3), two storage grooves (2-21) which are arranged on the disc (2-2) and are matched with the two connecting shafts (2-31), and an adjusting frame (2-4) arranged at one side of the disc (2-2); the adjusting frame (2-4) is trapezoid with an opening at the lower end, and long-strip-shaped grooves (2-41) are formed in the side frames at two sides; the two connecting shafts (2-31) respectively penetrate through the storage grooves (2-21) and the grooves (2-41) and are fixed through nuts (8).
5. The cell winding device of claim 4, wherein: the upper part of the adjusting frame (2-4) is provided with a locking block (2-42); the adjusting assembly further comprises a screw rod (2-5), the lower end of the screw rod (2-5) is connected with the driven shaft (2-1), the upper portion of the screw rod passes through the locking block (2-42) and is fixed through a nut (8), a spring II (2-6) is sleeved on the screw rod (2-5), and the top and the bottom of the spring respectively prop against the lower portion of the locking block (2-42) and the outer wall of the driven shaft (2-1).
6. A cell winding device according to claim 1, wherein: the tensioning mechanism (3) sequentially comprises two compensation rollers (3-1), one passing roller (3-2) and two clamping rollers (3-3) from front to back; the two ends of the compensation roller (3-1) located above are respectively provided with an extension plate (3-4) extending upwards and backwards, the end part of the extension plate (3-4) is connected with the fixing frame (1) through bolts, and the other two ends of the compensation roller (3-1), the passing roller (3-2) and the two clamping rollers (3-3) are respectively connected with the fixing frame (1) through bolts.
7. The cell winding device of claim 6, wherein: two vertical frames (1-2) are arranged in the middle of the fixing frame (1), and the two vertical frames (1-2) are respectively positioned at the left side and the right side of the fixing frame (1); the extension plate (3-4), the other compensation roller (3-1), the passing roller (3-2) and the two clamping rollers (3-3) are respectively connected with the two vertical frames (1-2) through bolts.
8. A cell winding device according to claim 1, wherein: the driving mechanism (5) comprises three motors (5-1), and output shafts of the three motors (5-1) are respectively connected with the three drums (4-1);
or, the driving mechanism (5) comprises a motor (5-1) and two transmission components, the motor (5-1) is connected with any one rotary drum (4-1), and the other two rotary drums (4-1) are connected with the motor through the transmission components.
9. The cell winding device of claim 8, wherein: the transmission assembly comprises a belt (5-2).
10. A cell winding device according to claim 2, wherein: the rotary shaft (4-11) is provided with a locking disc (4-15), the end part of the roller (4-12) is provided with a fixed disc (4-16), and the fixed disc (4-16) is propped against the locking disc (4-15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320381638.9U CN219832752U (en) | 2023-03-03 | 2023-03-03 | Battery cell winding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320381638.9U CN219832752U (en) | 2023-03-03 | 2023-03-03 | Battery cell winding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219832752U true CN219832752U (en) | 2023-10-13 |
Family
ID=88286132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320381638.9U Active CN219832752U (en) | 2023-03-03 | 2023-03-03 | Battery cell winding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219832752U (en) |
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2023
- 2023-03-03 CN CN202320381638.9U patent/CN219832752U/en active Active
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