CN211795430U - Force storage type upper limb support - Google Patents
Force storage type upper limb support Download PDFInfo
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- CN211795430U CN211795430U CN201922388630.1U CN201922388630U CN211795430U CN 211795430 U CN211795430 U CN 211795430U CN 201922388630 U CN201922388630 U CN 201922388630U CN 211795430 U CN211795430 U CN 211795430U
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- 210000001364 upper extremity Anatomy 0.000 title claims abstract description 18
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- 238000013016 damping Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 10
- 208000024891 symptom Diseases 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 17
- 238000005381 potential energy Methods 0.000 description 4
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- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009098 adjuvant therapy Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 210000002310 elbow joint Anatomy 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The force storage type upper limb support comprises an arm support, an arm support connecting rod, a front-back moving mechanism, a support plate, a front-back swinging mechanism and a spiral clamping mechanism, wherein the spiral clamping mechanism is used for clamping a desktop, the arm support is rotatably arranged at the front end of the arm support connecting rod, the rear end of the arm support connecting rod is rotatably arranged on the front-back moving mechanism, the front-back moving mechanism is arranged on the support plate, the support plate is arranged on the front-back swinging mechanism, the spiral clamping mechanism is arranged at the bottom of the front-back swinging mechanism, and the arm support is provided with an elastic bandage. The utility model provides a power storage formula upper limbs eyelidretractor helps the old person alleviate the arm burden in the long-time arm activity of needs, alleviates the arm ache symptom.
Description
Technical Field
The utility model relates to a force storage type upper limb support.
Background
In the life of most old people, arm muscles can not keep exerting force for a long time, and the corresponding desktop activity time is slightly longer, extreme discomfort and ache feeling can be generated, and the long-time degradation of the upper limb strength is greatly generalized in old people, the existing power-assisted upper limb device is generally used for treating patients with upper limb diseases, the device is heavy and is not suitable for the assistance of the ordinary household life of normal old people, the existing upper limb power-assisted assistor device in the market is present in treatment places such as hospitals and the like and is mainly used for the adjuvant therapy rehabilitation, a large market blank exists for the ordinary desktop auxiliary power-assisted device of normal old people, and many old people really need a simple, light and easy-to-operate product in the daily life to assist themselves to perform daily desktop recreational activities, and hope to save labor, the physical burden is reduced.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides a power storage type upper limb support device which helps the old to relieve the burden of the arms in the long-time arm activities and relieve the symptoms of arm ache.
The utility model provides a technical scheme that its technical problem adopted is:
a force storage type upper limb support comprises an arm support, an arm support connecting rod, a front-back moving mechanism, a support plate, a front-back swinging mechanism and a spiral clamping mechanism, wherein the spiral clamping mechanism is used for clamping a desktop;
the front part comprises a front bottom plate, two front optical axes, two front sliding blocks, two front supporting rods and two movement track limiting parts, the two front optical axes are arranged along the front-back direction, the front end and the back end of each front optical axis are respectively arranged on the front bottom plate through first supporting plates, the two front sliding blocks are respectively arranged on the two front optical axes and form a front-back sliding pair with the front optical axes, the two front supporting rods are respectively and symmetrically arranged on the left side and the right side of each supporting plate, the upper end of each front supporting rod is respectively hinged with the back end of each supporting plate, the lower end of each front supporting rod is hinged with the middle part of a semicircular disc, each semicircular disc is fixed on the outer side of the corresponding front sliding block through a connecting piece, the front end and the back end of each front sliding block are respectively connected with a front spring, and the other end of each front; the two motion trail limiting parts are arranged in bilateral symmetry and are respectively arranged at the outer sides of the two semicircular discs, each motion trail limiting part is provided with an arc-shaped groove hole, the arc-shaped concave surface is arranged backwards, the lower part of the front supporting rod is provided with a stud, the stud penetrates into the arc-shaped groove hole and can slide in the arc-shaped groove hole, a return spring is arranged in the arc-shaped groove hole, the upper end of the return spring is connected with a pin shaft, and the lower end of the return spring is connected with the motion trail limiting parts;
the rear part comprises a rear bottom plate, a rear optical axis, a rear sliding block and two rear supporting rods, wherein the rear optical axis is arranged in front and rear, the front end and the rear end of the rear optical axis are respectively installed on the rear bottom plate through second supporting plates, the rear sliding block is installed on the rear optical axis, the rear sliding block and the rear optical axis form a front-rear sliding pair, the front end and the rear end of the rear sliding block are respectively connected with a rear spring, and the other end of each rear spring is respectively connected with the corresponding second supporting plate; the two rear supporting rods are arranged in a bilateral symmetry mode, the upper ends of the two rear supporting rods are hinged to the front ends of the supporting plates respectively, the lower ends of the two rear supporting rods are connected through a connecting rod, the front end of a third connecting rod is hinged to the middle of the connecting rod, the rear end of the third connecting rod is hinged to the rear sliding block, and the two third supporting plates are arranged on the outer sides of the two rear supporting rods respectively and hinged to the lower portions of the rear supporting rods; the rear bottom plate and the front bottom plate are connected together through a connecting piece.
Further, the front-back moving mechanism comprises a slide rail and a slide block, the front end of the slide rail is rotatably arranged on the support plate through a damping rotating shaft, and the slide block is arranged on the slide rail and forms a front-back sliding pair with the slide rail; the rear end of the arm support connecting rod is rotatably arranged on the sliding block, and the arm support, the arm support connecting rod and the sliding block form a crank connecting rod mechanism.
The screw clamping mechanism comprises a clamping frame and a clamping shaft, the clamping frame comprises a top plate and a bottom plate, a threaded hole is formed in the bottom plate, an external thread is formed in the clamping shaft, a shaft body of the clamping shaft penetrates into the threaded hole in the bottom plate, a clamping plate is arranged at the upper end of the clamping shaft, and a knob is fixedly mounted at the lower end of the clamping shaft; the clamping plate is arranged at the bottom of the front bottom plate, the front bottom plate is higher than the rear bottom plate, and a clamping space is formed between the clamping plate and the top plate of the clamping frame.
Still further, the third connecting rod is hinged with an L-shaped piece, and the L-shaped piece is fixed on the rear sliding block.
Furthermore, the two front sliding blocks are connected through an I-shaped plate.
The beneficial effects of the utility model are that:
1) the elastic feedback force storage system is realized, the movable range of the machine is improved, the spring force storage structure is added, so that the spring is compressed through the connecting rod slider by means of the gravity of the arm when the arm of the old person does descending movement, the gravitational potential energy is stored in the spring, and when the arm needs to be lifted, the spring releases the elastic potential energy to provide upward assisting force for the arm, so that the arm can be subjected to elastic feedback and assisting force no matter the arm does ascending or descending movement in various directions, similar structures on the market are optimized, and the burden required by the arm to do corresponding movement is greatly reduced; moreover, the top of the machine is used for realizing the front-back telescopic action of the arm and is replaced by a micro sliding rail, so that the arm does not need to generate redundant surrounding action when the front-back telescopic action is realized by using a mechanism, and the machine is more suitable for the normal motion track of the arm of a person;
2) improvement of structural stability and maintenance of flexibility between mechanisms
The structure is compact, and the self-designed three-crank sliding block parallel connection structure is adopted, so that the integral strength of the machine is improved, and the aim of reducing the unstable factors of the mechanism and preventing the flexibility of the whole system due to the rotatable setting of the arm support is fulfilled;
3) portable detachable design
The bottom spiral clamping mechanism is added, so that the function that the machine application environment can be changed by fixing the bottom spiral clamping mechanism can be realized, the application range of the machine is enlarged and enriched, the characteristic that the activity environment of the household table top of the old is changeable is adapted, and the practicability of the machine is improved.
Drawings
Fig. 1 is a front view of the upper part of the present invention.
Fig. 2 is a side view of the upper portion of the present invention.
Fig. 3 is a schematic structural view of the screw clamp mechanism.
Fig. 4 is a front view of the lower part of the present invention.
Fig. 5 is a side view of fig. 4.
Fig. 6 is a top view of fig. 4.
Fig. 7 is a schematic structural diagram of the present invention.
Fig. 8 is a schematic structural diagram of the motion trajectory limiting member.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 8, a force storage type upper limb support comprises an arm support 1, an arm support connecting rod 2, a front-back moving mechanism, a support plate 7, a front-back swinging mechanism and a spiral clamping mechanism used for clamping a desktop, wherein the arm support 1 is rotatably arranged at the front end of the arm support connecting rod 2, the rear end of the arm support connecting rod 2 is rotatably arranged on the front-back moving mechanism, the front-back moving mechanism is arranged on the support plate 7, the support plate 7 is arranged on the front-back swinging mechanism, the spiral clamping mechanism is arranged at the bottom of the front-back swinging mechanism, and an elastic bandage is arranged on the arm support 1;
the front-back swing mechanism comprises a front part and a back part, the front part comprises a front bottom plate, two front optical axes, two front slide blocks 19, two front support rods 22 and two motion trail limiting pieces 21, the two front optical axes are arranged along the front-back direction, the front end and the back end of each front optical axis are respectively arranged on the front bottom plate through a first support plate 13, the two front slide blocks 19 are respectively arranged on the two front optical axes, the front sliding block 19 and the front optical axis form a front-back sliding pair, the two front supporting rods 22 are respectively and symmetrically arranged on the left side and the right side of the supporting plate 7, the upper end of each front supporting rod 22 is respectively hinged with the rear end of the supporting plate 7, the lower end of each front supporting rod is hinged with the middle part of the semicircular disc 17, each semicircular disc 17 is fixed on the outer side of the corresponding front sliding block 19 through a connecting piece, the front end and the rear end of each front sliding block 19 are respectively connected with a front spring, and the other end of each front spring is respectively connected with the corresponding first supporting plate 13; the two motion trail limiting parts 21 are arranged in a bilateral symmetry mode and are respectively arranged on the outer sides of the two semicircular discs 17, each motion trail limiting part 21 is provided with an arc-shaped groove hole, an arc-shaped concave surface faces backwards, the lower portion of the front supporting rod 22 is provided with a stud, the stud penetrates into the arc-shaped groove hole and can slide in the arc-shaped groove hole, a reset spring is arranged in the arc-shaped groove hole, the upper end of the reset spring is connected with a pin shaft, and the lower end of the reset spring is connected with the motion trail limiting parts 21;
the rear part comprises a rear bottom plate 20, a rear optical axis 14, a rear slider 15 and two rear support rods 23, wherein the rear optical axis 14 is arranged in front and rear, the front end and the rear end of the rear optical axis 14 are respectively installed on the rear bottom plate through second support plates 18, the rear slider 15 is installed on the rear optical axis 14, the rear slider 15 and the rear optical axis 14 form a front-rear sliding pair, the front end and the rear end of the rear slider 15 are respectively connected with a rear spring 16, and the other end of each rear spring 16 is respectively connected with the corresponding second support plate 18; the two rear supporting rods 23 are arranged in bilateral symmetry, the upper ends of the two rear supporting rods 23 are hinged with the front end of the supporting plate 7 respectively, the lower ends of the two rear supporting rods 23 are connected through a connecting rod, the front end of the third connecting rod 5 is hinged with the middle of the connecting rod, the rear end of the third connecting rod 5 is hinged with the rear sliding block 15, and the two third supporting plates 24 are arranged on the outer sides of the two rear supporting rods 23 respectively and hinged with the lower parts of the rear supporting rods 23; the rear bottom plate 20 and the front bottom plate are connected together by a connecting member.
Further, the front-back moving mechanism comprises a slide rail 10 and a slide block 11, the front end of the slide rail 10 is rotatably mounted on the support plate 7 through the damping rotating shaft 6, and the slide block 11 is mounted on the slide rail 10 and forms a front-back sliding pair with the slide rail 10; the rear end of the arm support connecting rod is rotatably arranged on the sliding block 11, and the arm support 1, the arm support connecting rod 2 and the sliding block 11 form a crank connecting rod mechanism.
Further, the screw clamping mechanism comprises a clamping frame 3 and a clamping shaft 4, the clamping frame 3 comprises a top plate and a bottom plate, a threaded hole is formed in the bottom plate, an external thread is arranged on the clamping shaft 4, a shaft body of the clamping shaft penetrates into the threaded hole in the bottom plate, a clamping plate is arranged at the upper end of the clamping shaft 4, and a knob is fixedly mounted at the lower end of the clamping shaft; the clamping plate is arranged at the bottom of the front bottom plate, the front bottom plate is higher than the rear bottom plate, and a clamping space is formed between the clamping plate and the top plate of the clamping frame 3.
Still further, the third connecting rod 5 is hinged with an L-shaped piece, which is fixed on the rear slider 15.
Furthermore, the two front sliders 19 are connected by an I-shaped plate.
As shown in fig. 1, the arm support 1 is a U-shaped PVC plate, a stud is provided at the bottom of the rear end of the arm support 1, a cylindrical member is provided at the front end of the arm support link 2, the stud on the arm support 1 is inserted into the cylindrical member and forms a rotation pair with the cylindrical member, a stud is provided at the bottom of the rear end of the arm support link 2, a connecting member is fixed on the slider 11 by a screw, a cylindrical member is provided on the connecting member, and the stud on the arm support link 2 is inserted into the cylindrical member and forms a rotation pair with the cylindrical member. As shown in fig. 2, a supporting plate cover plate 8 is further provided on the supporting plate 7.
As shown in fig. 3, the clamping frame 3 and the clamping shaft 4 are connected together through a screw pair, when the machine needs to meet different working environment requirements, the mechanism can be loosened by unscrewing the clamping shaft 4, so that the mechanism is detached from the previous application environment, then the mechanism is moved to the next working plane, the new working plane is fastened with the clamping frame 3 by simply screwing the clamping shaft 4 through a knob, the machine can meet the requirement of stability during working, and the machine has the advantages of wide application scene range and flexibility of simple assembly and disassembly.
As shown in fig. 4 and 5, the non-coplanar parallel four-bar linkage structure composed of the front support bar 22 and the rear support bar 23, the spring force storage structure composed of the optical axis, the spring and the sliding block and used for realizing the natural forward bending and stretching action of the arm, and the movement track limiting part and the return spring are combined to realize multiple spring force storage, so that the force required by the arm to lift when the old user uses the auxiliary mechanism to perform long-time table entertainment activities is greatly reduced, and in the arm lifting movement, the arm is assisted to lift by the stored force in the spring in a rebound feedback manner, and the labor saving effect is achieved. The parallel four-bar linkage structure rotates back and forth to drive the sliding block on the optical axis to move back and forth, so that the spring on the optical axis is compressed and released. The upper end of the supporting rod is hinged with the corner brace 9 through a butt joint screw 12, the corner brace 9 is positioned by a steel plate, and the steel plate is translated to drive the corner brace to move so as to cause the supporting rod to rotate back and forth;
in the process of applying the four-bar linkage structure to store multiple forces, because the front support rod is positioned by the moving tracks of the two optical axes, in order to ensure that the compression degrees of the springs on the two optical axes are the same when the mechanism lifts and places the arms, so that the upper half part of the mechanism moves synchronously without the problem of mechanism stability reduction caused by lateral torsion, a word plate is specially used for connecting the front slide blocks on the optical axes arranged on the front bottom plate, so that the two tracks move synchronously, therefore, when the parallel four-bar linkage structure moves in the arm lifting and pressing action states, the slide blocks on the optical axes move synchronously, so that the compression states of the springs are the same, the motion identity of the four support rods is high, thereby improving the structural stability and realizing the joint of the mechanism motion and the motion of the upper limbs of a human.
The I-shaped plate is used as a connecting piece between the two front sliding blocks which move in parallel, so that the two front sliding blocks are guaranteed to be relatively static at any time in the moving process, and the stability of the device is improved. The motion trail limiting part 21 is a stacked groove structure, a reset spring is sleeved in the middle of the motion trail limiting part, the stud moves in a groove hole of the stud, and the effect of buffering, rebounding and returning of the device is achieved by compressing and releasing the spring. The slide rail 10 can rotate around the damping rotating shaft 6, and the damping rotating shaft 6 is arranged on the supporting plate. Three sliders in the front-back swinging mechanism and corresponding support rods form a three-crank slider parallel structure.
In this embodiment, firstly, in order to satisfy the lifting and pressing actions of the arm, a multi-link slider mechanism is designed, and a spring is added on the slider operation optical axis of the base plate to provide elastic feedback and energy storage and release, so that when the arm performs the pressing action by virtue of its own gravity, the mechanism link drives the slider to slide on the optical axis of the base plate to compress the spring fixed on the optical axis, the gravitational potential energy is converted into the elastic potential energy of the spring to be stored in the spring, and another purpose of the added spring is a buffer action during the action traveling, thereby preventing the damage and the mechanism abrasion caused by the excessively high speed of the arm during the operation of the arm support and the like.
Secondly, during arm stretching action, a front-back moving mechanism is designed, so that when the arm support is used for realizing the arm stretching action, redundant surrounding action is not needed, and the running track of the mechanism is fit with the normal running track of the arm of a human.
In order to realize the left-right swinging action of the elbow joint, a fixed-shaft rotating structure with one degree of freedom at the connecting part of the arm support and the arm support connecting rod is designed, so that the normal left-right swinging action of the arm during the desktop entertainment activity is realized.
The utility model discloses a working process does:
when the old person carries out long-time desktop recreational activities, press from both sides the machine through spiral clamping mechanism at first and tightly to the desktop, then with the upper limbs forearm elbow partial front end flat lapping on arm support 1, it is fixed through the elastic bandage on the arm support, drive arm support 1 through arm support connecting rod and carry out the back-and-forth movement action on slide rail 10, simultaneously because arm support 1 can rotate with arm support connecting rod 2, can rotate between arm support connecting rod 2 and slider 11, can realize the arm and control the swing action, certainly with can realize the horizontal swing when moving in the front and back.
And the cooperation of the front and back parts of the front and back swing mechanism realizes the lifting and pressing actions of the arm, which specifically comprises the following steps: the front spring is compressed and released, the supporting plate drives the front supporting rod 22, the front supporting rod 22 drives the semicircular disc 17 to move back and forth, and meanwhile, the stud on the front supporting rod 22 rotates relative to the arc-shaped slotted hole on the semicircular disc 17 in a fixed axis mode, so that the reset spring in the compressed slotted hole is compressed and released; meanwhile, the rear slider 15 moves back and forth on the rear optical axis 14, and the rear spring 16 is compressed and released.
The utility model discloses a power all drives through user's arm.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (5)
1. The utility model provides a power storage formula upper limbs eyelidretractor which characterized in that: the arm support is rotatably arranged at the front end of the arm support connecting rod, the rear end of the arm support connecting rod is rotatably arranged on the front-rear swinging mechanism, the front-rear swinging mechanism is arranged on the supporting plate, the supporting plate is arranged on the front-rear swinging mechanism, the spiral clamping mechanism is arranged at the bottom of the front-rear swinging mechanism, and the arm support is provided with an elastic binding band;
the front part comprises a front bottom plate, two front optical axes, two front sliding blocks, two front supporting rods and two movement track limiting parts, the two front optical axes are arranged along the front-back direction, the front end and the back end of each front optical axis are respectively arranged on the front bottom plate through first supporting plates, the two front sliding blocks are respectively arranged on the two front optical axes and form a front-back sliding pair with the front optical axes, the two front supporting rods are respectively and symmetrically arranged on the left side and the right side of each supporting plate, the upper end of each front supporting rod is respectively hinged with the back end of each supporting plate, the lower end of each front supporting rod is hinged with the middle part of a semicircular disc, each semicircular disc is fixed on the outer side of the corresponding front sliding block through a connecting piece, the front end and the back end of each front sliding block are respectively connected with a front spring, and the other end of each front; the two motion trail limiting parts are arranged in bilateral symmetry and are respectively arranged at the outer sides of the two semicircular discs, each motion trail limiting part is provided with an arc-shaped groove hole, the arc-shaped concave surface is arranged backwards, the lower part of the front supporting rod is provided with a stud, the stud penetrates into the arc-shaped groove hole and can slide in the arc-shaped groove hole, a return spring is arranged in the arc-shaped groove hole, the upper end of the return spring is connected with a pin shaft, and the lower end of the return spring is connected with the motion trail limiting parts;
the rear part comprises a rear bottom plate, a rear optical axis, a rear sliding block and two rear supporting rods, wherein the rear optical axis is arranged in front and rear, the front end and the rear end of the rear optical axis are respectively installed on the rear bottom plate through second supporting plates, the rear sliding block is installed on the rear optical axis, the rear sliding block and the rear optical axis form a front-rear sliding pair, the front end and the rear end of the rear sliding block are respectively connected with a rear spring, and the other end of each rear spring is respectively connected with the corresponding second supporting plate; the two rear supporting rods are arranged in a bilateral symmetry mode, the upper ends of the two rear supporting rods are hinged to the front ends of the supporting plates respectively, the lower ends of the two rear supporting rods are connected through a connecting rod, the front end of a third connecting rod is hinged to the middle of the connecting rod, the rear end of the third connecting rod is hinged to the rear sliding block, and the two third supporting plates are arranged on the outer sides of the two rear supporting rods respectively and hinged to the lower portions of the rear supporting rods; the rear bottom plate and the front bottom plate are connected together through a connecting piece.
2. The stored force upper limb support of claim 1, wherein: the front-back moving mechanism comprises a slide rail and a slide block, the front end of the slide rail is rotatably arranged on the support plate through the damping rotating shaft, and the slide block is arranged on the slide rail and forms a front-back sliding pair with the slide rail; the rear end of the arm support connecting rod is rotatably arranged on the sliding block, and the arm support, the arm support connecting rod and the sliding block form a crank connecting rod mechanism.
3. A stored force upper limb support according to claim 1 or 2 wherein: the spiral clamping mechanism comprises a clamping frame and a clamping shaft, the clamping frame comprises a top plate and a bottom plate, a threaded hole is formed in the bottom plate, an external thread is arranged on the clamping shaft, a shaft body of the clamping shaft penetrates into the threaded hole in the bottom plate, a clamping plate is arranged at the upper end of the clamping shaft, and a knob is fixedly mounted at the lower end of the clamping shaft; the clamping plate is arranged at the bottom of the front bottom plate, the front bottom plate is higher than the rear bottom plate, and a clamping space is formed between the clamping plate and the top plate of the clamping frame.
4. A stored force upper limb support according to claim 1 or 2 wherein: the third connecting rod is hinged with the L-shaped piece, and the L-shaped piece is fixed on the rear sliding block.
5. A stored force upper limb support according to claim 1 or 2 wherein: the two front sliding blocks are connected through an I-shaped plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922388630.1U CN211795430U (en) | 2019-12-27 | 2019-12-27 | Force storage type upper limb support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922388630.1U CN211795430U (en) | 2019-12-27 | 2019-12-27 | Force storage type upper limb support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211795430U true CN211795430U (en) | 2020-10-30 |
Family
ID=73035813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922388630.1U Expired - Fee Related CN211795430U (en) | 2019-12-27 | 2019-12-27 | Force storage type upper limb support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211795430U (en) |
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2019
- 2019-12-27 CN CN201922388630.1U patent/CN211795430U/en not_active Expired - Fee Related
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