CN220774443U - Power battery gland device - Google Patents
Power battery gland device Download PDFInfo
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- CN220774443U CN220774443U CN202320750787.8U CN202320750787U CN220774443U CN 220774443 U CN220774443 U CN 220774443U CN 202320750787 U CN202320750787 U CN 202320750787U CN 220774443 U CN220774443 U CN 220774443U
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- battery
- capping device
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- 210000004907 gland Anatomy 0.000 title claims abstract description 48
- 230000006835 compression Effects 0.000 claims abstract description 32
- 238000007906 compression Methods 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 238000003825 pressing Methods 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims description 22
- 230000000903 blocking effect Effects 0.000 claims description 13
- 239000000523 sample Substances 0.000 claims description 10
- 230000006698 induction Effects 0.000 claims description 8
- 230000001939 inductive effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 19
- 238000003475 lamination Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 10
- 238000003466 welding Methods 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model provides a power battery capping device, which comprises a conveyor belt and a capping mechanism, wherein the conveyor belt and the capping mechanism are arranged on a rack; the positioning mechanism comprises a positioning plate and a baffle plate which are parallel to the conveying direction, the baffle plate is arranged on the opposite side of the positioning plate, a positioning cylinder is arranged on the outer side of the positioning plate on the rack, the positioning plate is connected with the moving end of the positioning cylinder, and a plurality of concave parts for positioning the battery are arranged on the positioning plate at intervals along the conveying direction; the gland mechanism comprises compression bars which can be lifted, the compression bars and the concave parts are arranged in one-to-one correspondence, the device is suitable for automatic production lines of batteries, loading and unloading of the batteries are realized through the conveying belt, and before lamination, the positioning plates are driven to move towards the baffle plates through positioning cylinders in the positioning mechanism, so that the batteries are positioned through the concave parts, the automatic assembly of the negative electrode covers and the batteries is realized through compression bar pressing, the alignment precision during lamination assembly is improved, and the product yield is improved.
Description
Technical Field
The utility model relates to the technical field of lithium battery production and processing, in particular to a power battery gland device.
Background
The power battery is a power source that provides a source of power for the tool. Among them, cylindrical lithium batteries are widely used in power cells because of standardized external dimensions, very mature production equipment and processing processes. The processing flow of the cylindrical battery production line is as follows: the method comprises the steps of feeding a battery cell, rubbing, electrically measuring, welding a positive electrode current collecting disc, pasting positive electrode glue, inserting a shell, welding a positive electrode post, welding a negative electrode, detecting by X-ray, electrically measuring, injecting liquid and installing a negative electrode cover.
The power battery is provided with a negative electrode cover as the final procedure of a cylindrical battery production line, and the battery and the negative electrode cover are assembled. In production, the negative electrode cover is firstly arranged on the battery, and then the negative electrode cover is pressed down to be in press fit connection with the battery. For the battery after press-fit connection, whether the negative electrode cover is installed to be qualified or not needs to be detected, and defective products are removed. In the prior art, the battery is manually placed into the pressing component for pressing, and the battery is manually taken out after pressing. Meanwhile, if the battery is placed in an inaccurate position in the pressing component, the negative electrode cover cannot be pressed into the battery accurately, and waste products are caused. The production mode is low in efficiency and is not suitable for an automatic battery production line.
Disclosure of Invention
In order to overcome the problems in the related art, the utility model provides the power battery gland device which is suitable for an automatic battery production line, can position fed batteries before lamination, improves the alignment precision during lamination assembly, and improves the product yield.
The utility model aims to provide a power battery capping device which comprises a conveying belt and a capping mechanism, wherein the conveying belt and the capping mechanism are arranged on a rack;
the positioning mechanism comprises a positioning plate and a baffle plate which are parallel to the conveying direction, the baffle plate is arranged on the opposite side of the positioning plate, and a battery channel is formed among the positioning plate, the baffle plate and the conveying belt;
a positioning air cylinder is arranged on the rack at the outer side of the positioning plate, the positioning plate is connected with the moving end of the positioning air cylinder, and a plurality of concave parts for positioning the battery are arranged on the positioning plate at intervals along the conveying direction;
the gland mechanism comprises pressing rods which can be lifted, and the pressing rods are arranged in one-to-one correspondence with the concave parts.
In the preferred technical scheme of the utility model, the two ends of the positioning plate are respectively provided with a blocking block, a blocking cylinder is arranged on the rack at the outer side of the blocking block, and the blocking block is connected with the movable end of the blocking cylinder
In the preferred technical scheme of the utility model, the induction probes are arranged above the concave parts positioned at the first position and the last position on the positioning plate.
In the preferred technical scheme of the utility model, the gland mechanism comprises a gland pushing plate positioned above the conveying belt, the gland pushing plate is arranged on the frame through a lifting assembly, and a plurality of compression bars are arranged on the gland pushing plate at intervals.
In the preferred technical scheme of the utility model, the compression bar penetrates through the gland pushing plate and is in sliding fit with the gland pushing plate; a detection assembly is arranged on the gland pushing plate beside the compression bar; the detection assembly comprises plunger springs and induction pieces, at least two plunger springs are uniformly distributed on the periphery of the compression bar, the plunger springs are arranged on the gland pushing plate, and a plurality of positioning notches matched with the plunger springs in a one-to-one correspondence manner are formed in the upper periphery of the compression bar; the sensing piece is arranged beside the upper end of the pressing rod, the plunger spring is clamped with the positioning notch in the initial state of the pressing rod, and the pressing rod triggers the sensing piece through upward movement.
In the preferred technical scheme of the utility model, the sensing piece is an infrared receiver and an infrared emitter, the upper end of the pressure lever is provided with a limiting part, the limiting part is horizontally provided with a detection hole, the pressure lever is respectively positioned at two ends of the detection hole in an initial state, and infrared light emitted by the infrared emitter can pass through the detection hole and be received by the infrared receiver.
In the preferred technical scheme of the utility model, a return baffle is arranged above the compression bar on the frame.
In a preferred technical scheme of the utility model, the lifting component is an air cylinder or a linear module.
In the preferred technical scheme of the utility model, the induction piece is arranged on the gland pushing plate through a bracket.
In the preferred technical scheme of the utility model, the induction probe is arranged on the upper side surface of the positioning plate through the support.
The beneficial effects of the utility model are as follows:
the device is suitable for an automatic battery production line, can position the fed battery before lamination, improves the alignment precision during lamination assembly, and improves the product yield;
according to the device, the feeding and the discharging of the battery are realized through the conveying belt, and the positioning cylinder in the positioning mechanism drives the positioning plate to move towards the baffle, so that the battery is positioned through the concave part, the alignment precision during assembly can be improved, and the product yield is improved; the negative electrode cover and the battery are automatically assembled by pressing the pressing rod downwards.
Drawings
Fig. 1 is a schematic structural view of a power battery capping device.
Fig. 2 is a schematic structural view of the positioning mechanism.
Fig. 3 is a schematic diagram of the position state of the pressing rod when the detection result is qualified.
Fig. 4 is a schematic diagram of the position state of the pressing lever when the detection result is failed.
Reference numerals:
1-a conveyor belt; 2-a frame; 3-a positioning mechanism; 301-;302-;303-;304-; 4-cell; 5-a compression bar; 6-lifting assembly; 7-a gland pushing plate; 8-a return baffle; 9-an inductive probe; 10-a blocking block; 11-blocking the cylinder; 12-plunger spring; 13-a sensing member; 14-a limiting part; 15-detection well.
Detailed Description
Preferred embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as information, and similarly, the information may also be referred to as first information, without departing from the scope of the utility model. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The power battery is a power source that provides a source of power for the tool. Among them, cylindrical lithium batteries are widely used in power cells because of standardized external dimensions, very mature production equipment and processing processes. The processing flow of the cylindrical battery production line is as follows: the method comprises the steps of feeding a battery cell, rubbing, electrically measuring, welding a positive electrode current collecting disc, pasting positive electrode glue, inserting a shell, welding a positive electrode post, welding a negative electrode, detecting by X-ray, electrically measuring, injecting liquid and installing a negative electrode cover.
The power battery is provided with a negative electrode cover as the final procedure of a cylindrical battery production line, and the battery and the negative electrode cover are assembled. In production, the negative electrode cover is firstly arranged on the battery, and then the negative electrode cover is pressed down to be in press fit connection with the battery. For the battery after press-fit connection, whether the negative electrode cover is installed to be qualified or not needs to be detected, and defective products are removed. In the prior art, the lamination of the negative electrode cover and the subsequent detection are independent, the lamination is needed at a lamination station, and then the laminated battery is conveyed to a detection station for detection, so that the production mode is low in efficiency.
Example 1
In view of the above problems, embodiment 1 provides a power battery capping device, which is suitable for an automatic battery production line, and can position a fed battery before lamination, thereby improving alignment accuracy during lamination assembly and improving product yield.
As shown in fig. 1-4, the power battery capping device comprises a conveying belt 1 and a capping mechanism, wherein the conveying belt 1 and the capping mechanism are arranged on a frame 2, and the capping mechanism is arranged at a capping station of the conveying belt 1; the machine frame 2 is provided with a positioning mechanism 3 at a gland station, the positioning mechanism 3 comprises a positioning plate and a baffle plate which are parallel to the conveying direction, the baffle plate is arranged on the opposite side of the positioning plate, and a battery channel is formed between the positioning plate, the baffle plate and the conveying belt 1; a positioning air cylinder is arranged on the frame 2 at the outer side of the positioning plate, the positioning plate is connected with the moving end of the positioning air cylinder, and a plurality of concave parts for positioning the battery 4 are arranged on the positioning plate at intervals along the conveying direction; the gland mechanism comprises pressing rods 5 which can be lifted, and the pressing rods 5 are arranged in one-to-one correspondence with the concave parts.
For example, in practical application, in order to realize automation, the actions of each component in the device are controlled by the controller in advance programming, and the corresponding stations are provided with sensors to sense whether each action is in place.
When the device is used, firstly, the battery 4 with the negative electrode cover, which is arranged on the conveyer belt 1, is conveyed to a gland station; then, the positioning mechanism 3 acts, and the positioning cylinder drives the positioning plate to move towards the baffle plate, so that the battery 4 is positioned through the concave part, the alignment precision during assembly is improved, and the product yield is improved; then, the compression bar 5 is pressed down, and the negative electrode cover is pressed into the battery 4 to realize press fit assembly; finally, the conveyor belt 1 feeds out the press-fitted battery 4.
The device is suitable for an automatic battery production line, can position the fed battery 4 before lamination, improves the alignment precision during lamination assembly, and improves the product yield; the device realizes the feeding and discharging of the battery 4 through the conveying belt 1, and drives the positioning plate to move towards the baffle through the positioning cylinder in the positioning mechanism 3, so that the battery 4 is positioned through the concave part, the alignment precision during assembly can be improved, and the product yield can be improved; the automatic assembly of the negative electrode cap with the battery 4 is achieved by pressing down the compression bar 5.
In this embodiment, for the degree of automation that improves the device, realize the automation of material loading, location, pressfitting assembly, unloading, the locating plate both ends all are provided with and block the dog 10, block cylinder 11 is installed to the frame 2 in blocking the outside side of dog 10, block the movable end that block cylinder 11 is connected to the dog 10, inductive probe 9 is all installed to the concave part top that is located first position and end position on the locating plate, inductive probe 9 connection director.
Illustratively, in practical application, the sensing probe 9 is mounted on the upper side of the locating plate via a support.
When the battery 4 is sensed by the sensing probe 9 at the head end, the blocking cylinder 11 at the head end drives the blocking block 10 to extend out to block the battery 4; then, after the sensing probe 9 at the tail end senses the battery 4, the capping station finishes feeding, and the blocking cylinder 11 at the tail end drives the stop block to extend out so as to block the incoming battery 4; subsequently, the positioning mechanism 3 acts, and the positioning cylinder drives the positioning plate to move towards the baffle plate, so that the battery 4 is positioned through the concave part; after positioning, the compression bar 5 acts to press and assemble; after the press fit assembly is completed; the blocking cylinders 11 at the first end and the last end drive the blocking blocks 10 to withdraw.
In this embodiment, the gland mechanism includes a gland pushing plate 7 located above the conveyor belt 1, the gland pushing plate 7 is installed on the frame 2 through the lifting component 6, and a plurality of compression bars 5 are disposed on the gland pushing plate 7 at intervals.
In one embodiment, in order to shorten the production period and improve the production efficiency, the compression rod 5 penetrates through the gland pushing plate 7 and is in sliding fit with the gland pushing plate; a detection component is arranged on the gland pushing plate 7 beside the compression bar 5; the detection assembly comprises plunger springs 12 and sensing pieces 13, the sensing pieces 13 are connected with a controller, at least two plunger springs 12 are uniformly distributed on the periphery of the compression bar 5, the plunger springs 12 are arranged on the gland push plate 7, and a plurality of positioning notches which are matched with the plunger springs 12 in a one-to-one correspondence manner are formed in the upper periphery side of the compression bar 5; the sensing piece 13 is arranged beside the upper end of the pressure lever 5, the plunger spring 12 is clamped with the positioning notch in the initial state of the pressure lever 5, the pressure lever 5 triggers the sensing piece 13 through upward movement, and the pressure lever 5 is driven to descend through the gland pushing plate 7, so that the press fit of the negative electrode cover and the battery 4 is realized; the compression bar 5 is in sliding fit with the gland pushing plate 7, if the negative electrode cover cannot be installed in place, the compression bar 5 can be moved upwards by the reaction force of the negative electrode cover and trigger the sensing piece 13, so that whether the negative electrode cover is installed in place or not is detected when the negative electrode cover is pressed with the battery 4.
Illustratively, in practical applications, the lifting assembly 6 is a cylinder or a linear module.
Illustratively, in practice, the sensing element 13 is mounted to the gland plate 7 via a bracket.
When the device is used, the conveying belt 1 conveys the battery 4 with the negative electrode cover below the pressing rod 5, then the pressing cover pushing plate 7 is driven to move downwards to the lower limit position by the lifting assembly 6, and the negative electrode cover is pressed into the battery 4 by the pressing rod 5 in the downward movement process to complete assembly; if the negative electrode cover below the pressure lever 5 is accurately aligned with the battery 4 and positioned (the alignment of the negative electrode cover and the battery 4 is accurately ensured by the negative electrode cover mounting procedure of the input side of the device, the device ensures accurate positioning through the positioning mechanism), the negative electrode cover is smoothly pressed into the battery 4, the pressure lever 5 is still in an initial state, the sensing piece 13 is not triggered, and at the moment, the controller judges that the battery 4 is qualified; if the negative electrode cover below the pressing rod 5 is accurately aligned with the battery 4 and positioned, the pressing rod 5 cannot be smoothly pressed into the battery 4 through the negative electrode cover, at this time, the pressing rod 5 is separated from the plunger spring 12 to move upwards and trigger the sensing piece 13 under the reaction force of the negative electrode cover, and at this time, the controller judges that the battery 4 is unqualified.
In this embodiment, the sensing element 13 is an infrared receiver and an infrared emitter, a limiting portion 14 is disposed at the upper end of the pressure lever 5, a detection hole 15 is horizontally formed in the limiting portion 14, the infrared receiver and the infrared emitter are respectively located at two ends of the detection hole 15 in an initial state of the pressure lever 5, infrared light emitted by the infrared emitter can pass through the detection hole 15 to be received by the infrared receiver, and when the infrared receiver is used, infrared light emitted by the infrared emitter which moves upwards by the pressure lever 5 is blocked and cannot pass through the detection hole 15, and infrared light cannot be received by the infrared receiver.
In this embodiment, a return baffle 8 is mounted on the frame 2 above the compression bar 5.
For example, in practical application, an induction switch is arranged at the upper limit position and the lower limit position of the outer side of the gland pushing plate 7, and the induction switch is connected with a controller; when the gland pushing plate 7 drives the compression bar 5 to move downwards to the lower limit position and the compression bar 5 finishes the gland action, the gland pushing plate 7 drives the compression bar 5 to move upwards to the upper limit position, and at the moment, the compression bar 5 which moves upwards and is separated from the plunger spring 12 during gland can be blocked by the return baffle 8 to move downwards and restore to the initial state, so that the smooth operation of the next compression bar 5 is ensured.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures. In the description of the present application, it should be understood that, azimuth words such as "front, rear, upper, lower, left, right", "horizontal direction, vertical, horizontal", and "top, bottom", etc., indicate azimuth or positional relationships generally based on those shown in the drawings, and are merely for convenience of description and simplification of the description, and these azimuth words do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.
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. A power battery capping device, characterized in that: the device comprises a conveying belt and a gland mechanism which are arranged on a frame, wherein the gland mechanism is arranged at a gland station of the conveying belt;
the positioning mechanism comprises a positioning plate and a baffle plate which are parallel to the conveying direction, the baffle plate is arranged on the opposite side of the positioning plate, and a battery channel is formed among the positioning plate, the baffle plate and the conveying belt;
a positioning air cylinder is arranged on the rack at the outer side of the positioning plate, the positioning plate is connected with the moving end of the positioning air cylinder, and a plurality of concave parts for positioning the battery are arranged on the positioning plate at intervals along the conveying direction;
the gland mechanism comprises pressing rods which can be lifted, and the pressing rods are arranged in one-to-one correspondence with the concave parts.
2. The power cell capping device according to claim 1, wherein: the locating plate both ends all are provided with the block piece, block the cylinder in blocking the outside side installation of block in the frame, block the movable end that the block piece is connected and is blocked the cylinder.
3. The power cell capping device according to claim 2, wherein: inductive probes are arranged above the concave parts positioned at the first position and the last position on the positioning plate.
4. The power cell capping device according to claim 1, wherein: the gland mechanism comprises a gland pushing plate positioned above the conveying belt, the gland pushing plate is arranged on the frame through a lifting assembly, and a plurality of compression bars are arranged on the gland pushing plate at intervals.
5. The power cell capping device according to claim 4, wherein: the compression bar penetrates through the gland pushing plate and is in sliding fit with the gland pushing plate; a detection assembly is arranged on the gland pushing plate beside the compression bar; the detection assembly comprises plunger springs and induction pieces, at least two plunger springs are uniformly distributed on the periphery of the compression bar, the plunger springs are arranged on the gland pushing plate, and a plurality of positioning notches matched with the plunger springs in a one-to-one correspondence manner are formed in the upper periphery of the compression bar; the sensing piece is arranged beside the upper end of the pressing rod, the plunger spring is clamped with the positioning notch in the initial state of the pressing rod, and the pressing rod triggers the sensing piece through upward movement.
6. The power cell capping device according to claim 5, wherein: the sensing piece is an infrared receiver and an infrared emitter, a limit part is arranged at the upper end of the pressure rod, a detection hole is horizontally formed in the limit part, the infrared receiver and the infrared emitter are respectively positioned at two ends of the detection hole in an initial state of the pressure rod, and infrared light emitted by the infrared emitter can pass through the detection hole and be received by the infrared receiver.
7. The power cell capping device according to claim 5, wherein: and a return baffle plate is arranged above the compression bar on the frame.
8. The power cell capping device according to claim 4, wherein: the lifting component is an air cylinder or a linear module.
9. The power cell capping device according to claim 5, wherein: the induction piece is arranged on the gland pushing plate through a bracket.
10. A power cell capping device according to claim 3, wherein: the inductive probe is arranged on the upper side surface of the positioning plate through the support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320750787.8U CN220774443U (en) | 2023-04-07 | 2023-04-07 | Power battery gland device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320750787.8U CN220774443U (en) | 2023-04-07 | 2023-04-07 | Power battery gland device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220774443U true CN220774443U (en) | 2024-04-12 |
Family
ID=90612416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320750787.8U Active CN220774443U (en) | 2023-04-07 | 2023-04-07 | Power battery gland device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220774443U (en) |
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2023
- 2023-04-07 CN CN202320750787.8U patent/CN220774443U/en active Active
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