CN219428365U - Parafoil with inflatable air bag - Google Patents
Parafoil with inflatable air bag Download PDFInfo
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- CN219428365U CN219428365U CN202223581646.2U CN202223581646U CN219428365U CN 219428365 U CN219428365 U CN 219428365U CN 202223581646 U CN202223581646 U CN 202223581646U CN 219428365 U CN219428365 U CN 219428365U
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Abstract
The utility model provides a parafoil with an inflatable air bag, which is added with the inflatable air bag on the basis of the traditional punching parafoil or single parafoil, so that the aerodynamic shape of the parafoil under various wind power conditions can be ensured, and the stability and the air stagnation of the flying state of the parafoil are improved. The parafoil comprises: the load cabin and the parafoil body are connected with the load cabin through a plurality of parafoil ropes; when the parafoil body is a stamped parafoil, placing air bags in one or more air chambers of the stamped parafoil, wherein the air bags are fixed in the air chambers; when the parafoil body is a single parafoil, arranging an air bag row formed by a plurality of air bags which are sequentially connected in the longitudinal direction on the upper surface or/and the lower surface of the single parafoil according to the pneumatic appearance of the single parafoil, wherein each air bag is connected with the parafoil body at a corresponding position; the air bag is provided with an independent inflation valve and an independent deflation valve for inflating and deflating the air bag.
Description
Technical Field
The utility model relates to a parafoil, in particular to a parafoil with an inflatable air bag.
Background
The current common parafoil on the market comprises a punching parafoil and a single parafoil, wherein the punching parafoil canopy is made of airtight coated fabrics and is provided with upper and lower wing surfaces, and wing-shaped ribs are connected in the middle. The leading edge of the canopy is notched to facilitate air entry into the air chamber. The rib is provided with vent holes, which is convenient for air circulation among the air chambers, so as to ensure that the umbrella cloth is inflated rapidly and the pressure of each air chamber is uniform. The single-winged umbrella is a structure with a single-layer canopy.
The pneumatic appearance of the stamping type parafoil and the single parafoil can be influenced when the stamping type parafoil and the single parafoil meet side wind or air, and the pneumatic appearance of the parafoil (namely, the parafoil collapse) which cannot meet the flight or air stagnation state is easily caused, so that the parafoil is unstable and falls down, and the use safety of the parafoil is influenced. In addition, because the punching type parafoil is provided with the open air chamber, under the condition of raining and windy, rainwater easily enters the air chamber from the front end opening of the air chamber, thereby influencing the use of the punching type parafoil.
Disclosure of Invention
In view of the above, the utility model provides a parafoil with an inflatable air bag, which is added with the inflatable air bag on the basis of the traditional punching parafoil or single parafoil, and can ensure that the parafoil can keep aerodynamic appearance under various wind power conditions, thereby increasing the stability and the air stagnation of the flying state of the parafoil.
The parafoil with inflatable air bag comprises: the load cabin and the parafoil body are connected with the load cabin through a plurality of parafoil ropes;
when the parafoil body is a stamped parafoil, placing air bags in one or more air chambers of the stamped parafoil, wherein the air bags are fixed in the air chambers;
when the parafoil body is a single parafoil, arranging an air bag row formed by a plurality of air bags which are sequentially connected in the longitudinal direction on the upper surface or/and the lower surface of the single parafoil according to the pneumatic appearance of the single parafoil, wherein each air bag is connected with the parafoil body at a corresponding position;
the air bag is provided with an independent inflation valve and an independent deflation valve for inflating and deflating the air bag.
Preferably: the automatic folding and unfolding mechanism is used for automatically folding and unfolding the parafoil body.
Preferably: the automatic retraction mechanism is arranged in the middle of the parafoil body or on the load cabin.
Preferably: the automatic retraction mechanism includes: the electric winding drum and the winding and unwinding cable;
one ends of the two winding and unwinding cables are fixed and wound on the electric winding drum, and the other ends of the two winding and unwinding cables extend to the two longitudinal ends of the parafoil body respectively and are connected with the parafoil body at the extreme end of the side respectively.
Preferably: the electric reel comprises: the device comprises a clutch unit and two rope winding units, wherein the two rope winding units are respectively used for driving the folding and unfolding of parafoil bodies positioned at two sides of an automatic folding and unfolding mechanism;
the rope winding unit includes: the rope winding device comprises a fixed concave wheel, a sliding cam, a rope winding motor, a rope winding disc and a rope winding disc shaft;
the power output end of the rope winding motor is coaxially and fixedly connected with the fixed concave wheel; the rope winding disc shaft coaxially fixedly connects the sliding cam and the rope winding disc through a spline; the end face of the sliding cam with the convex teeth is coaxially opposite to the end face of the fixed concave wheel with the concave teeth; the winding and unwinding cable is wound on the cable winding disc;
the clutch unit is used for connecting or disconnecting the sliding cams in the two rope winding units with the fixed concave wheels; the clutch unit comprises a clutch and a sliding cam shifting fork translation rod; one end of the sliding cam shifting fork translation rod is connected with the clutch, and the other end of the sliding cam shifting fork translation rod is matched with the sliding cams of the two rope winding units respectively and is used for driving the two sliding cams to translate synchronously, so that synchronous combination or separation of the sliding cams in the two rope winding units and the fixed concave wheels is realized.
Preferably: when the parafoil body is a stamping parafoil, the air bag is a double-layer or three-layer folding air bag;
when the double-layer folding air bag is adopted, the double-layer folding air bag comprises two air bag sections connected through a flexible folding surface, wherein one air bag section is positioned inside the air chamber, and the other air bag section is folded above or below the air chamber;
when the three-layer folding air bag is adopted, the three-layer folding air bag comprises three air bag sections which are sequentially connected through flexible folding surfaces, wherein one air bag section is positioned inside the air chamber, and the other two air bag sections are respectively folded to the upper part and the lower part of the air chamber.
Preferably: when the parafoil body is a single parafoil, a flexible reinforced separation belt is arranged between every two adjacent air bags.
Preferably: when the parafoil body is a single parafoil, a longitudinal inflation belt is arranged on one lateral side of the air bag row, and an inflation valve is arranged on the inflation belt corresponding to each air bag and used for rapidly inflating the air bags.
Preferably: and hydrogen or helium is filled in the air bag.
Preferably: and the flexible tail wing is arranged at the longitudinal middle position of the rear end of the parafoil body.
The beneficial effects are that:
(1) According to the parafoil with the inflatable air bag, the inflatable air bag is added on the basis of the traditional punching parafoil or the single parafoil, so that the parafoil can be ensured to keep aerodynamic appearance under various wind conditions (such as side wind or air pocket or no wind, etc.), and the stability and the air stagnation of a flying state are improved; and the lift force of the parafoil can be improved after the air bag is additionally arranged.
(2) In order to realize automatic retraction of the parafoil, an automatic retraction mechanism is further arranged, and after the air bag is deflated, the parafoil body can be automatically retracted through the automatic retraction mechanism.
(3) When in use, the number of the air bags can be selected according to the use requirement so as to adjust the lifting force of the parafoil and ensure that the structural strength of the parafoil is stable.
(4) When the inflatable wing umbrella is used, the flexible reinforced partition belts are arranged between adjacent airbags, so that the wing surface strength can be increased, proper shape deformation can be realized between each independent airbag, and the pneumatic shape of the whole wing umbrella body after the airbags are inflated is ensured to accord with the pneumatic layout of the original design.
(5) For the punching parafoil, the air chamber has limited volume, and the air bag can be a double-layer folded or three-layer folded air bag, so that the volume of the air bag can be further increased and the lifting force of the parafoil can be improved on the basis of not changing the original structure of the punching parafoil.
(6) Can set up the fin that links to each other with the parafoil body according to the user demand, at the flexible fin of the vertical intermediate position in parafoil body rear end, can increase the stability of parafoil body in a certain airspace fixed stagnancy.
Drawings
FIG. 1 is a schematic structural view of a stamped parafoil with an airbag;
FIG. 2 is a schematic structural view of a single-winged umbrella with an airbag;
FIG. 3 is a schematic view of the structure of an airbag array;
FIG. 4 is a schematic view of the structure of the automatic retracting mechanism;
fig. 5 is a schematic structural view of a three-layer folded airbag.
Wherein: 1-hauling ropes, 2-load cabins, 3-parafoil ropes, 4-parafoil bodies, 5-tail wings, 6-air bags, 7-flexible reinforcing separation belts, 8-inflation valves, 9-inflation belts, 12-sliding cams, 13-fixed concave wheels, 14-rope coiling motors, 15-clutches, 16-rope coiling disks, 17-rope coiling disk shafts, 18-sliding cam shifting fork translation rods, 19-air bag sections A, 20-air bag sections B, 21-air bag sections C, 22-flexible folding surfaces, 23-internal ventilation pipes, 24-external ventilation pipes and 25-inflation valves.
Detailed Description
The utility model will now be described in detail by way of example with reference to the accompanying drawings.
Example 1:
the embodiment provides a parafoil with an inflatable air bag, which is added with the inflatable air bag on the basis of the traditional punching parafoil or single parafoil, so that the parafoil can keep aerodynamic appearance under various wind power conditions, and the stability and the air stagnation of the flying state of the parafoil are improved.
As shown in fig. 1, the parafoil with an inflatable airbag includes: the device comprises a load cabin 2, a traction rope 1 connected with the load cabin 2, and a parafoil body 4 connected with the load cabin 2 through a plurality of parafoil ropes 3; the tail 5 connected with the parafoil body 4 can also be arranged according to the use requirement. The flexible tail fin 5 is arranged at the longitudinal middle position of the rear end of the parafoil body 4, so that the stability of fixed stagnation of the parafoil body in a certain airspace can be improved by arranging the tail fin.
For convenience of description, the parafoil body 4 is made to have a longitudinal direction (i.e., a left-right direction as viewed in fig. 1) and a width direction (i.e., a front-rear direction as viewed in fig. 1). The parafoil body 4 may be a stamped parafoil or a mono-parafoil.
In this embodiment, the parafoil body 4 is a stamped parafoil, the stamped parafoil has a plurality of air chambers with front openings along the longitudinal direction, and the air bags 6 can be placed in one or more air chambers according to the use requirement (the air bags 6 are fixed inside the air chambers, for example, connected with the umbrella canopy forming the corresponding air chamber by sewing or binding), and the whole parafoil body 4 is still kept in a bilateral symmetry structure after the air bags 6 are arranged. The air bags 6 are arranged in the air chambers, so that the aerodynamics of the parafoil can be kept under various wind conditions, and the stability of the flight state of the stamped parafoil is improved.
The air bag 6 is arranged in the air chamber in the middle, so that the dead weight of the parafoil can be adjusted, and collapse is avoided. The inside of the air bag 6 can be filled with hydrogen or helium according to the requirement so as to improve the lift force of the parafoil, thereby enabling the parafoil to float under the windless condition.
Each air bag 6 is provided with an independent air charging valve and an independent air discharging valve, in the example, the air charging valve and the air discharging valve are all one-way valves, and the air bags 6 can be rapidly inflated through the air charging valves; the air bag can be rapidly deflated and pumped out by the deflation valve when the parafoil body is recovered, so that the air in the air bag 6 can be discharged. The inflation valves of the individual airbags can be connected by means of an inflation belt which is connected to an inflation device, whereby the inflation of the individual airbags 6 is achieved.
The parafoil with the structural form can make up for the defects of the conventional stamping parafoil, and the conventional stamping parafoil is provided with an open air inlet and is only suitable for windy weather; in this scheme, the gasbag 6 that is filled with helium or hydrogen is fixed according to the demand in the air chamber of punching press parafoil, can all can keep the aerodynamic profile of parafoil through gasbag 6 under any climatic conditions from this, and can guarantee to meet crosswind or other unusual circumstances and ensure that the parafoil is in the extension state all the time to increase the stability of flight state.
Example 2:
when the parafoil body 4 is a single parafoil, an air bag row formed by a plurality of air bags 6 connected in sequence along the longitudinal direction is arranged directly above or/and below the single parafoil canopy according to the pneumatic appearance of the single parafoil canopy, and the air bag row and the parafoil are connected together, for example, each air bag 6 is connected with the canopy at a corresponding position in a sewing or binding mode, as shown in fig. 2 and 3.
As shown in fig. 3, the airbag rows are sequentially connected by a plurality of airbags 6 along the longitudinal direction, a flexible reinforcing isolation belt 7 is arranged between every two adjacent airbags 6, and the main functions of the flexible reinforcing isolation belt 7 are as follows: first, increasing airfoil strength; secondly, the proper shape deformation amount of each independent air bag 6 is ensured, and the pneumatic shape of the whole parafoil body after the air bags 6 are inflated is ensured to accord with the pneumatic layout of the original design. The provision of a plurality of independent air bags 6 can avoid the deterioration of the ability of the entire parafoil cover to maintain the aerodynamic profile due to the occurrence of air leakage in one large air bag.
Each air bag 6 is provided with an independent air charging valve and an independent air discharging valve, in the example, a longitudinal air charging belt 9 is arranged on one lateral side of the parafoil body 4, an air charging valve 8 is arranged on the air charging belt 9 corresponding to each air bag 6 and is used for rapidly charging the air bag 6, and the air charging valve 8 adopts a one-way valve; further, each airbag 6 is provided with a release valve.
Example 3:
in addition to the above embodiment 1 or embodiment 2, an automatic retraction mechanism is further provided for automatically retracting the parafoil body 4. The automatic retraction mechanism can be arranged in the middle of the parafoil body 4 and also can be arranged on the load cabin 2.
In this example, the automatic retraction mechanism includes: the electric winding drum mechanism and the winding and unwinding cables are characterized in that one ends of the two winding and unwinding cables are fixed on the electric winding drum mechanism, the other ends of the two winding and unwinding cables extend to two longitudinal ends of the parafoil body 4 respectively, and the other ends of the two winding and unwinding cables sequentially penetrate through cable holes in the middle parts of the corresponding side air bags and are connected with the parafoil body 4 at the extreme end part of the side.
The electric reel mechanism includes: the clutch unit and the two rope winding units are respectively a left rope winding unit and a right rope winding unit and are respectively used for driving the winding and unwinding of the left side wing umbrella body 4 and the right side wing umbrella body 4 of the automatic winding and unwinding mechanism. The two rope winding units share a clutch unit; the rope winding unit includes: a fixed concave wheel 13, a sliding cam 12, a rope winding motor 14, a rope winding disc 16, a rope winding disc shaft 17 and a winding and unwinding cable; the power output end of the rope winding motor 14 is coaxially and fixedly connected with the fixed concave wheel 13; the rope reel shaft 17 coaxially and fixedly connects the sliding cam 12 and the rope reel 16 together through a spline; and the end face of the slide cam 12 having the convex teeth is coaxially opposed to the end face of the fixed concave wheel 13 having the concave teeth. The clutch unit is used for connecting or disconnecting the sliding cam 12 and the fixed concave wheel 13 in the two rope coiling units; the clutch unit comprises a clutch 15 and a sliding cam shifting fork translation rod 18; the clutch 15 can be an eccentric wheel driven by an eccentric wheel motor or an electromagnetic push rod driven by an electromagnetic clutch, one end of a sliding cam shifting fork translation rod 18 is respectively matched with the sliding cams 12 of the two rope coiling units, and the other end of the sliding cam shifting fork translation rod is connected with the clutch 15; the clutch 15 drives the sliding cam shifting fork translation rod 18 to move, so that the two sliding cams 12 are driven to synchronously move, and synchronous combination or separation of the sliding cams 12 and the fixed concave wheels 13 in the two rope coiling units is realized. The sliding cam shifting fork translation rod 18 is only used for driving the two sliding cams 12 to translate and not rotate along with the sliding cams 12; if the outer circumferential surfaces of the sliding cams 12 are provided with annular grooves, the part of the sliding cam shifting fork translation rod 18 matched with the two sliding cams 12 is in a disc structure, and the opposite ends of the outer circumferential surfaces of the sliding cam shifting fork translation rod are respectively positioned in the annular grooves of the outer circumferential surfaces of the two sliding cams 12 to push the two sliding cams 12 to axially move and not rotate along with the sliding cams 12.
The winding and unwinding ropes are wound on the rope winding disc 16 and sequentially pass through the rope holes on the corresponding side air bags 6 and then are connected with the most end part of the side of the parafoil body; for the air chamber without the air bag, the winding and unwinding rope passes through the rope penetrating holes on the ribs on two sides of the air chamber and then is connected with the extreme end part of the side of the parafoil body.
When the parafoil body needs to be recovered, firstly, each air bag 6 is deflated, then the sliding cam 12 is combined with the fixed concave wheel 13 through the clutch 15, the rope winding motor 14 drives the rope winding disc 16 to rotate, and the recovery of the winding and unwinding mooring rope wound on the rope winding disc 16 drives the two sides of the parafoil body to be recovered; when the parafoil body needs to be released, each air bag 6 is inflated first, at this time, the sliding cam 12 and the fixed concave wheel 13 are in a separated state, and the parafoil body provided with the air bags 6 ascends under the action of pneumatic force to drive the rope reel 16 to idle on the rope reel shaft 17.
Example 4:
in the above embodiment 1, when the parafoil body is a ram parafoil, the lift of the parafoil is improved in order to further increase the volume of the airbag 6 without changing the structure of the conventional ram parafoil. The foldable air bag can be used in a certain air chamber according to the requirement, and the foldable air bag can be a double-layer folded air bag or a three-layer folded air bag.
The foldable air bag can be selectively used in a certain air chamber according to the needs; in view of the fact that an automatic retracting mechanism is arranged in the middle-most air chamber, a foldable air bag is arranged in the middle-most air chamber of the stamping parafoil to adjust dead weight, avoid middle collapse and enable gravity of the automatic retracting mechanism not to influence pneumatic appearance.
When the double-layer folding air bag is adopted, the double-layer folding air bag comprises two air bag sections connected through a flexible folding surface, wherein one air bag section is positioned inside the air chamber, and the other air bag section is folded above or below the air chamber;
when the three-layer folding air bag is adopted, the three-layer folding air bag comprises three air bag sections which are sequentially connected through flexible folding surfaces, wherein one air bag section is positioned inside the air chamber, and the other two air bag sections are respectively folded to the upper part and the lower part of the air chamber.
The embodiment provides a structure of a three-layer folding air bag, which comprises three air bag sections which are sequentially connected, namely an air bag section A19, an air bag section B20 and an air bag section C21; wherein the air bag section A19 and the air bag section B20 are connected through a flexible folding surface 22, and the air bag section B20 and the air bag section C21 are connected through the flexible folding surface 22; the flexible folding surface 22 is provided with an internal vent pipe 23 for communicating the three air bag sections and an external vent pipe 24 for communicating the three air bag sections with an external inflation pipeline; the outer vent tube 24 is provided with an inflation valve 25 for inflating the three-layer folded airbag.
When the air bag is installed, the air bag section A is installed in the air chamber to serve as a middle-layer air bag, at the moment, a flexible folding surface 22 between the air bag section A and the air bag section B is positioned at the opening of the front side of the air chamber, the air bag section B is folded above the air chamber to serve as an upper-layer air bag at the position of the flexible folding surface 22, at the moment, the flexible folding surface 22 between the air bag section B and the air bag section C is positioned at the rear side of the upper-layer air bag, and the air bag section C is folded downwards at the rear side of the upper-layer air bag to enable the air bag section C to be folded and the air chamber to serve as a lower-layer air bag. And then the three air bag sections are bound together through the bag binding ropes.
In summary, the above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model. 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 parafoil with inflatable airbag comprising: the device comprises a load cabin (2) and a parafoil body (4) connected with the load cabin (2) through a plurality of parafoil ropes (3); it is characterized in that the method comprises the steps of,
when the parafoil body (4) is a stamping parafoil, placing air bags in one or more air chambers of the stamping parafoil, wherein the air bags are fixed in the air chambers;
when the parafoil body (4) is a single parafoil, arranging an air bag row formed by a plurality of air bags which are sequentially connected along the longitudinal direction on the upper surface or/and the lower surface of the single parafoil according to the pneumatic appearance of the single parafoil, wherein each air bag is connected with the parafoil body (4) at a corresponding position;
the air bag is provided with an independent inflation valve and an independent deflation valve for inflating and deflating the air bag.
2. The parafoil with inflatable airbag according to claim 1, further comprising an automatic retraction mechanism for automatic retraction of the parafoil body (4).
3. The parafoil with inflatable airbag according to claim 2, characterized in that the automatic retraction mechanism is arranged in the middle of the parafoil body (4) or on the load compartment (2).
4. A parafoil with inflatable air-bag as claimed in claim 2 or 3, wherein the automatic retraction mechanism comprises: an electric reel mechanism and a winding and unwinding cable;
one ends of the two winding and unwinding cables are fixed on the electric winding drum mechanism, the other ends of the two winding and unwinding cables extend to two longitudinal ends of the parafoil body (4) respectively and are connected with the parafoil body (4) at the extreme end of the side respectively.
5. The inflatable airbag parafoil of claim 4, wherein the motorized reel mechanism comprises: the device comprises a clutch unit and two rope winding units, wherein the two rope winding units are respectively used for driving the folding and unfolding of parafoil bodies (4) positioned at two sides of the automatic folding and unfolding mechanism;
the rope winding unit includes: a fixed concave wheel (13), a sliding cam (12), a rope winding motor (14), a rope winding disc (16) and a rope winding disc shaft (17);
the power output end of the rope winding motor (14) is coaxially and fixedly connected with the fixed concave wheel (13); the rope coiling disc shaft (17) is used for coaxially fixedly connecting the sliding cam (12) and the rope coiling disc (16) through a spline; the end face of the sliding cam (12) with the convex teeth is coaxially opposite to the end face of the fixed concave wheel (13) with the concave teeth; the winding and unwinding cable is wound on the cable winding disc (16);
the clutch unit is used for connecting or disconnecting the sliding cams (12) in the two rope winding units with the fixed concave wheels (13); the clutch unit comprises a clutch (15) and a sliding cam shifting fork translation rod (18); one end of a sliding cam shifting fork translation rod (18) is connected with the clutch (15), and the other end of the sliding cam shifting fork translation rod is matched with the sliding cams (12) of the two rope coiling units respectively and is used for driving the two sliding cams (12) to translate synchronously, so that synchronous combination or separation of the sliding cams (12) in the two rope coiling units and the fixed concave wheels (13) is realized.
6. A parafoil with inflatable air bag as claimed in any one of claims 1 to 3, wherein when the parafoil body is a ram parafoil, the air bag is a double-or triple-folded air bag;
when the double-layer folding air bag is adopted, the double-layer folding air bag comprises two air bag sections connected through a flexible folding surface, wherein one air bag section is positioned inside the air chamber, and the other air bag section is folded above or below the air chamber;
when the three-layer folding air bag is adopted, the three-layer folding air bag comprises three air bag sections which are sequentially connected through flexible folding surfaces, wherein one air bag section is positioned inside the air chamber, and the other two air bag sections are respectively folded to the upper part and the lower part of the air chamber.
7. A parafoil with inflatable air-bags according to any of claims 1-3, wherein when the parafoil body is a mono-parafoil, a flexible reinforcing barrier (7) is provided between each two adjacent air-bags.
8. A parafoil with inflatable air bags according to any one of claims 1 to 3, wherein when the parafoil body is a single parafoil, a longitudinal inflatable strap is provided on one lateral side of the array of air bags, and an inflation valve is provided on each inflatable strap for rapid inflation of the air bags.
9. A parafoil with inflatable balloon as claimed in any of claims 1-3, wherein the balloon is internally inflated with hydrogen or helium.
10. A parafoil with inflatable air bag according to any of claims 1-3, characterized in that the rear end of the parafoil body (4) is longitudinally provided with a flexible tail (5) in a middle position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223581646.2U CN219428365U (en) | 2022-12-31 | 2022-12-31 | Parafoil with inflatable air bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223581646.2U CN219428365U (en) | 2022-12-31 | 2022-12-31 | Parafoil with inflatable air bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219428365U true CN219428365U (en) | 2023-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223581646.2U Active CN219428365U (en) | 2022-12-31 | 2022-12-31 | Parafoil with inflatable air bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219428365U (en) |
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2022
- 2022-12-31 CN CN202223581646.2U patent/CN219428365U/en active Active
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