CN215496836U - Lithium battery discharge recovery tool - Google Patents
Lithium battery discharge recovery tool Download PDFInfo
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- CN215496836U CN215496836U CN202121508053.6U CN202121508053U CN215496836U CN 215496836 U CN215496836 U CN 215496836U CN 202121508053 U CN202121508053 U CN 202121508053U CN 215496836 U CN215496836 U CN 215496836U
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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Abstract
The utility model belongs to the technical field of battery recovery, and particularly relates to a lithium battery discharge recovery tool which comprises a rack, and a lifting device, a discharge device and a lithium battery positioning device which are arranged on the rack; the discharging device comprises a lifting plate and a plurality of groups of discharging probes, the lifting plate is connected with the rack in a sliding mode, the discharging probes are arranged on the lifting plate in parallel and at intervals, and one group of discharging probes corresponds to one group of lithium batteries and is used for being in contact with electrodes of the corresponding lithium batteries for discharging; the lifting end of the lifting device penetrates through the top of the rack and is connected with the lifting plate, and the lifting device is used for driving the lifting plate to lift in the rack; the lithium battery positioning device is arranged at the bottom of the discharging device and used for positioning and fixing each lithium battery. The batch discharge of multiple groups of lithium batteries is realized, and the lithium battery recovery efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of battery recovery, and particularly relates to a lithium battery discharge recovery tool.
Background
Lithium batteries are a type of battery using a nonaqueous electrolyte solution and using lithium metal or a lithium alloy as a negative electrode material, and can be roughly classified into two types: lithium metal batteries and lithium ion batteries. The lithium ion battery does not contain metallic lithium, can be charged, is convenient to use and high in safety, and is widely applied to various fields in our lives. However, the service life of the existing lithium battery is limited, most lithium ion batteries have huge environmental marks (footprint) in a recovery mode after the batteries are discarded, and a lot of valuable materials cannot be recovered. Materials used to manufacture lithium ion batteries (e.g., lithium and cobalt) are expected to be threatened in the near future, and alternative sources of these materials must be used to ensure that the cost of lithium ion batteries can be tolerated. Because the interior of the garbage can contains a large amount of harmful substances, the garbage can cannot be directly put into the garbage can, but is subjected to centralized treatment.
At huge present of lithium cell quantity, big lithium cell is all facing to scrap old, and lithium battery treatment process is at first to the lithium cell do the processing of discharging, just can get into broken process, and the unable batch processing of discharging to the lithium cell of discharging device now, probably leads to electrified lithium cell to handle and pile up, causes the threat to people's life. And current lithium cell specification is more, and the lithium cell of different specification models can't be handled with unified discharge device, is not convenient for discharge treatment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a lithium battery discharge recovery tool, and aims to solve the technical problems that a discharge device in the prior art cannot perform discharge treatment on lithium batteries in batches, the specifications of the existing lithium batteries are more, and lithium batteries of different specifications and models cannot be treated by a uniform discharge device.
In order to achieve the above purpose, the lithium battery discharge recovery tool provided by the embodiment of the utility model comprises a rack, and a lifting device, a discharge device and a lithium battery positioning device which are arranged on the rack; the discharging device comprises a lifting plate and a plurality of groups of discharging probes, the lifting plate is connected with the rack in a sliding mode, the discharging probes are arranged on the lifting plate in parallel and at intervals, and one group of discharging probes corresponds to one group of lithium batteries and is used for being in contact with electrodes of the corresponding lithium batteries for discharging; the lifting end of the lifting device penetrates through the top of the rack and is connected with the lifting plate, and the lifting device is used for driving the lifting plate to lift in the rack; the lithium battery positioning device is arranged at the bottom of the discharging device and used for positioning and fixing each lithium battery.
Optionally, each of the discharge probes is arranged in series.
Optionally, the discharge device further comprises a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are both connected to the bottom of the lifting plate, and the distance between the first connecting plate and the second connecting plate is adjustable; each discharge probe all includes first probe and second probe, and each first probe all is connected on the first connecting plate, and each second probe all is connected on the second connecting plate.
Optionally, a plurality of adjusting sliding chutes which are arranged in parallel at intervals are arranged on the lifting plate; one end of each first probe, which is far away from the lithium battery positioning device, sequentially penetrates through the first connecting plate and the adjusting sliding groove; and one end of each second probe, which is far away from the lithium battery positioning device, sequentially penetrates through the second connecting plate and the adjusting sliding groove.
Optionally, a bearing is sleeved at one end of each first probe far away from the lithium battery positioning device and one end of each second probe far away from the lithium battery positioning device, and the bearings are clamped in the adjusting sliding grooves.
Optionally, the lithium battery positioning device includes a first pull rod and a second pull rod, and the first pull rod is stacked on the second pull rod; the first pull rod and the second pull rod are respectively provided with limiting parts with the same number as the discharge probes, and the limiting parts are uniformly arranged at intervals; when the first pull rod and the second pull rod move relatively, the adjacent limiting part on the first pull rod and the limiting part on the second pull rod form a clamping position for clamping the lithium battery.
Optionally, both one end of the first pull rod and one end of the second pull rod are provided with a handheld portion, and the handheld portions extend along the length direction of the corresponding first pull rod and the second pull rod; the handheld portion of the first pull rod and the handheld portion of the second pull rod are symmetrically arranged.
Optionally, the bottom of the rack is provided with positioning hole groups with the same number as the discharge probes, each positioning hole group corresponds to each clamping position one to one, and a positioning pin penetrates through the positioning hole groups to be matched with the lithium battery positioning device to fix the lithium battery.
Optionally, the positioning hole group includes a plurality of positioning holes, and the positioning holes are arranged in a splayed shape.
Optionally, the rack includes four guide rods, four ends of the guide rods are respectively connected to the top and the bottom of the rack, and the lifting plate is slidably connected to the four guide rods.
One or more technical solutions in the lithium battery discharge recovery tool provided by the embodiment of the present invention at least have one of the following technical effects: according to the lithium battery discharge recovery tool, the lifting device is located at the top of the discharging device, and the lithium battery positioning device is located at the bottom of the discharging device; each group of the discharge probes are uniformly arranged at the bottom of the lifting plate at intervals, and the lifting plate can move on the rack along the vertical direction under the driving of the lifting device; when the lithium battery discharging device is used, a plurality of lithium batteries are placed on the rack, the lithium batteries are fixed and limited in the left-right direction through the lithium battery positioning device, then the lifting device drives the lifting plate to fall down, so that each group of discharging probes are respectively contacted with two electrodes of the corresponding lithium batteries for discharging, the limiting and fixing in the up-down direction of each group of lithium batteries are realized, after the discharging is finished, the lifting device drives the discharging device to lift, the lithium battery positioning device resets, and the discharged lithium batteries can be taken out; so, realize discharging in batches the multiunit lithium cell, improve the efficiency that the lithium cell was retrieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a lithium battery discharge recovery tool provided in an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a point a in fig. 1.
Fig. 3 is a schematic structural diagram of the lithium battery discharge recovery tool provided in the embodiment of the present invention from another view angle.
Fig. 4 is a schematic structural diagram of a discharge device according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a lithium battery positioning device according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
10-frame 11-positioning hole group 12-guide rod
20-lifting device 21-back wave hand wheel 22-screw rod
30-discharge device 31-lifting plate 32-discharge probe
33-first connecting plate 34-second connecting plate 40-lithium battery positioning device
41-first pull rod 42-second pull rod 43-limiting part
44-clamping position 111-positioning hole 311-adjusting sliding groove
321-first probe 322-second probe 323-bearing
411-strip groove 412-hand-held portion.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-5 are exemplary and intended to be used to illustrate embodiments of the utility model, and should not be construed as limiting the utility model.
In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In an embodiment of the present invention, as shown in fig. 1 to 4, a lithium battery discharging and recycling tool is provided, which includes a frame 10, and a lifting device 20, a discharging device 30 and a lithium battery positioning device 40 which are arranged on the frame 10; the discharging device 30 comprises a lifting plate 31 and a plurality of groups of discharging probes 32, the lifting plate 31 is connected with the rack 10 in a sliding manner, each discharging probe 32 is arranged on the lifting plate 31 in parallel and at intervals, and one group of discharging probes 32 corresponds to one group of lithium batteries and is used for contacting and discharging with electrodes of the corresponding lithium batteries; the lifting end of the lifting device 20 passes through the top of the rack 10 and is connected with the lifting plate 31, so as to drive the lifting plate 31 to lift in the rack 10; the lithium battery positioning device 40 is disposed at the bottom of the discharging device 30 and used for positioning and fixing each lithium battery.
Specifically, in the lithium battery discharge recovery tool of the embodiment of the present invention, the lifting device 20 is located at the top of the discharge device 30, and the lithium battery positioning device 40 is located at the bottom of the discharge device 30; each group of the discharge needles 32 is uniformly arranged at the bottom of the lifting plate 31 at intervals, and the lifting plate 31 can move in the vertical direction on the rack 10 under the driving of the lifting device 20; when the lithium battery discharging device is used, a plurality of lithium batteries are placed on the rack 10, the lithium batteries are fixed and limited in the left-right direction through the lithium battery positioning device 40, then the lifting device 20 drives the lifting plate 31 to fall down, so that each group of discharging needles 32 are respectively contacted with two electrodes of the corresponding lithium batteries for discharging, the limiting and fixing in the up-down direction of each group of lithium batteries are realized, after the discharging is finished, the lifting device 20 drives the discharging device 30 to be lifted, the lithium battery positioning device 40 is reset, and the discharged lithium batteries can be taken out; so, realize discharging in batches the multiunit lithium cell, improve the efficiency that the lithium cell was retrieved.
In another embodiment of the present invention, as shown in fig. 1 to 4, each of the discharge probes 32 is disposed in series. Specifically, the discharge probes 32 are connected in series, and have good discharge effect after contacting with lithium batteries,
In another embodiment of the present invention, as shown in fig. 1 to 4, the discharging device 30 further includes a first connecting plate 33 and a second connecting plate 34, the first connecting plate 33 and the second connecting plate 34 are both connected to the bottom of the lifting plate 31, and the distance between the first connecting plate 33 and the second connecting plate 34 is adjustable; each of the discharge probes 32 includes a first probe 321 and a second probe 322, each of the first probes 321 is connected to the first connection plate 33, and each of the second probes 322 is connected to the second connection plate 34. Specifically, the first connecting plate 33 and the second connecting plate 34 have the same structure and the same external dimensions; each first probe 321 is fixedly connected to the first connecting plate 33 by means of a bolt connection, and each second probe 322 is fixedly connected to the second connecting plate 34 by means of a bolt connection. The first connecting plate 33 and the second connecting plate 34 are connected to the bottom of the lifting plate 31, and the first connecting plate 33 and the second connecting plate 34 are arranged in parallel; for lithium batteries with different specifications, the distance between the first probe 321 and the second probe 322 is adjusted by adjusting the distance between the first connecting plate 33 and the second connecting plate 34 so as to match the distance between two electrodes of the lithium batteries with the corresponding specifications; therefore, the novel lithium battery discharge recovery tool can be suitable for batch discharge treatment of lithium batteries with different specifications.
Further, the lifting device 20 comprises a back wave hand wheel 21 and a screw rod 22, one end of the screw rod 22 penetrates through the top of the frame 10 and is connected with the lifting plate 31, and the back wave hand wheel 21 is connected to the other end of the screw rod 22. The length of the screw rod 22 is adjusted by rotating the back wave hand wheel 21, so that the lifting plate 31 is lifted.
In another embodiment of the present invention, as shown in fig. 1 to 4, a plurality of parallel and spaced adjusting sliding grooves 311 are provided on the lifting plate 31; one end of each first probe 321, which is far away from the lithium battery positioning device 40, sequentially penetrates through the first connecting plate 33 and the adjusting chute 311; one end of each second probe 322, which is far away from the lithium battery positioning device 40, sequentially penetrates through the second connecting plate 34 and the adjusting chute 311. Specifically, the adjusting chutes 311 are uniformly spaced, each first probe 321 and each second probe 322 can slide in the corresponding adjusting chute 311, and one end of each first probe 321 and one end of each second probe 322 located above the lifting plate 31 are connected in series through a conducting wire, so as to realize the series connection of each group of the discharging probes 32.
In another embodiment of the present invention, as shown in fig. 1 to 4, a bearing 323 is sleeved on one end of each first probe 321 away from the lithium battery positioning device 40 and one end of each second probe 322 away from the lithium battery positioning device 40, and the bearing 323 is clamped in the adjusting chute 311. Specifically, the outer side wall of the bearing 323 abuts against the inner side wall of the adjustment chute 311, and when the distance between the first connection plate 33 and the second connection plate 34, that is, the distance between the first probe 321 and the second probe 322 of each group of the discharge probes 32 is adjusted, the bearing 323 fitted over the first probe 321 rotates along with the movement of the first probe 321, and the bearing 323 fitted over the second probe 322 rotates along with the movement of the second probe 322. By the arrangement of the bearing 323, the first probe 321 and the second probe 322 can be moved to be more stable,
in another embodiment of the present invention, as shown in fig. 1 to 3 and 5, the lithium battery positioning device 40 includes a first pull rod 41 and a second pull rod 42, wherein the first pull rod 41 is stacked on the second pull rod 42; the first pull rod 41 and the second pull rod 42 are respectively provided with limiting parts 43 with the same number as that of the discharge probes 32, and the limiting parts 43 are uniformly arranged at intervals; when the first pull rod 41 and the second pull rod 42 move relatively, the adjacent limiting part 43 on the first pull rod 41 and the limiting part 43 on the second pull rod 42 form a clamping position 44 for clamping the lithium battery. Specifically, the first pull rod 41 is placed on the second pull rod 42, and can slide relative to the second pull rod 42; each limiting part 43 is vertically corresponding to the first pull rod 41 and the second pull rod 42; when fixing a plurality of lithium cells, place each lithium cell in frame 10 to be located each group of discharge needle 32 respectively under, then reverse pulling first pull rod 41 and second pull rod 42 simultaneously, make first pull rod 41 and second pull rod 42 take place the opposite direction's removal, spacing portion 43 on the adjacent first pull rod 41 and the spacing portion 43 on the second pull rod 42 form the centre gripping position 44 that is used for the centre gripping lithium cell, and fix each lithium cell, so realize that the lithium cell is fixed spacing. When discharging another batch of lithium batteries of different specifications, the width of the clamping position 44 is changed according to the width of the corresponding lithium battery, and the distance between the first connecting plate 33 and the second connecting plate 34 is adjustable, so that the lithium battery discharging and recycling tool can be suitable for batch discharging of lithium batteries of various specifications.
Further, both ends of the first pull rod 41 and the second pull rod 42 are provided with strip-shaped grooves 411, the strip-shaped grooves 411 extend along the length direction of the corresponding first pull rod 41 and the second pull rod 42, and the positioning element penetrates through the strip-shaped grooves 411 on the first pull rod 41 and the second pull rod 42 to be connected with the rack 10, so that the first pull rod 41 and the second pull rod 42 are fixed.
In another embodiment of the present invention, as shown in fig. 1 to 3 and 5, a handheld portion 412 is disposed at one end of the first pull rod 41 and one end of the second pull rod 42, and the handheld portion 412 extends along the length direction of the corresponding first pull rod 41 and the corresponding second pull rod 42; the holding part 412 of the first pull rod 41 and the holding part 412 of the second pull rod 42 are symmetrically arranged. Specifically, the handholds 412 are located at the side ends of the corresponding first pull rod 41 and second pull rod 42, and the first pull rod 41 and second pull rod 42 are conveniently pulled through the arrangement of the handholds 412.
In another embodiment of the present invention, as shown in fig. 1 to 3 and 5, the bottom of the rack 10 is provided with positioning hole groups 11 having the same number as the discharge probes 32, each positioning hole group 11 corresponds to each clamping position 44 one by one, and a positioning pin passes through the positioning hole group 11 to cooperate with the lithium battery positioning device 40 to fix a lithium battery. Specifically, the lithium battery positioning device 40 fixes and limits one end of the bottom of the lithium battery, and the positioning hole group 11 fixes and limits the other end of the bottom of the lithium battery through a positioning pin, so as to ensure the fixation and stability of the lithium battery,
in another embodiment of the present invention, as shown in fig. 1 to 3 and 5, the positioning hole set 11 includes a plurality of positioning holes 111, and the positioning holes 111 are arranged in a splayed shape. Specifically, when placing the lithium cell, because locating hole 111 arranges and is the splayed, and the interval between two relative locating holes 111 increases progressively toward the direction of keeping away from lithium cell positioner 40, and the lithium cell is located the centre of locating hole 111, so, can decide according to the thickness of lithium cell that the locating pin is pegged graft in which locating hole 111, realizes that the lithium cell of different thickness is fixed spacing.
In another embodiment of the present invention, as shown in fig. 1 and 3, the frame 10 includes four guide rods 12, two ends of the four guide rods 12 are respectively connected to the top and the bottom of the frame 10, and the lifting plate 31 is slidably connected to the four guide rods 12. Specifically, the four guide bars 12 are parallel to each other and perpendicular to the bottom and top of the frame 10; the lifting plate 31 is driven by the lifting device 20 to slide up and down along the guide bar 12.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a lithium cell retrieves frock that discharges which characterized in that: the lithium battery charging device comprises a rack, and a lifting device, a discharging device and a lithium battery positioning device which are arranged on the rack; the discharging device comprises a lifting plate and a plurality of groups of discharging probes, the lifting plate is connected with the rack in a sliding mode, the discharging probes are arranged on the lifting plate in parallel and at intervals, and one group of discharging probes corresponds to one group of lithium batteries and is used for being in contact with electrodes of the corresponding lithium batteries for discharging; the lifting end of the lifting device penetrates through the top of the rack and is connected with the lifting plate, and the lifting device is used for driving the lifting plate to lift in the rack; the lithium battery positioning device is arranged at the bottom of the discharging device and used for positioning and fixing each lithium battery.
2. The lithium battery discharge recovery tool according to claim 1, characterized in that: each of the discharge probes is arranged in series.
3. The lithium battery discharge recovery tool according to claim 1, characterized in that: the discharging device further comprises a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are both connected to the bottom of the lifting plate, and the distance between the first connecting plate and the second connecting plate is adjustable; each discharge probe all includes first probe and second probe, and each first probe all is connected on the first connecting plate, and each second probe all is connected on the second connecting plate.
4. The lithium battery discharge recovery tool according to claim 3, characterized in that: a plurality of adjusting sliding chutes which are arranged in parallel at intervals are arranged on the lifting plate; one end of each first probe, which is far away from the lithium battery positioning device, sequentially penetrates through the first connecting plate and the adjusting sliding groove; and one end of each second probe, which is far away from the lithium battery positioning device, sequentially penetrates through the second connecting plate and the adjusting sliding groove.
5. The lithium battery discharge recovery tool according to claim 4, characterized in that: and bearings are sleeved at one end of each first probe far away from the lithium battery positioning device and one end of each second probe far away from the lithium battery positioning device, and are clamped in the adjusting sliding grooves.
6. The lithium battery discharge recovery tool according to any one of claims 1 to 5, characterized in that: the lithium battery positioning device comprises a first pull rod and a second pull rod, and the first pull rod is arranged on the second pull rod in a stacked mode; the first pull rod and the second pull rod are respectively provided with limiting parts with the same number as the discharge probes, and the limiting parts are uniformly arranged at intervals; when the first pull rod and the second pull rod move relatively, the adjacent limiting part on the first pull rod and the limiting part on the second pull rod form a clamping position for clamping the lithium battery.
7. The lithium battery discharge recovery tool according to claim 6, characterized in that: one end of the first pull rod and one end of the second pull rod are both provided with a handheld part, and the handheld parts extend along the length direction of the corresponding first pull rod and the second pull rod; the handheld portion of the first pull rod and the handheld portion of the second pull rod are symmetrically arranged.
8. The lithium battery discharge recovery tool according to claim 6, characterized in that: and the bottom of the rack is provided with positioning hole groups with the same number as the discharge probes, each positioning hole group corresponds to each clamping position one by one, and a positioning pin penetrates through the positioning hole groups to be matched with the lithium battery positioning device to fix the lithium battery.
9. The lithium battery discharge recovery tool according to claim 8, characterized in that: the positioning hole group comprises a plurality of positioning holes, and the positioning holes are arranged in a splayed shape.
10. The lithium battery discharge recovery tool according to any one of claims 1 to 5, characterized in that: the frame includes four guide bars, four the both ends of guide bar are connected respectively the top and the bottom of frame, just lifter plate and four guide bar sliding connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121508053.6U CN215496836U (en) | 2021-07-02 | 2021-07-02 | Lithium battery discharge recovery tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121508053.6U CN215496836U (en) | 2021-07-02 | 2021-07-02 | Lithium battery discharge recovery tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215496836U true CN215496836U (en) | 2022-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121508053.6U Active CN215496836U (en) | 2021-07-02 | 2021-07-02 | Lithium battery discharge recovery tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215496836U (en) |
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2021
- 2021-07-02 CN CN202121508053.6U patent/CN215496836U/en active Active
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