CN220898332U - Integrated bidirectional electric driving device and electric bed thereof - Google Patents
Integrated bidirectional electric driving device and electric bed thereof Download PDFInfo
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- CN220898332U CN220898332U CN202322483435.3U CN202322483435U CN220898332U CN 220898332 U CN220898332 U CN 220898332U CN 202322483435 U CN202322483435 U CN 202322483435U CN 220898332 U CN220898332 U CN 220898332U
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 74
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 36
- 239000010959 steel Substances 0.000 claims description 36
- 230000007306 turnover Effects 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
An integrated bidirectional electric driving device and an electric bed thereof relate to the field of electric beds and comprise a mounting seat, a bidirectional screw rod, a driving motor, a traction mechanism and a transmission mechanism, wherein the bidirectional screw rod is rotatably arranged in the mounting seat and comprises a rod body, external threads and a rotating part, and the rod body is integrally formed; external threads are formed on the surface of the rod body along opposite directions from two ends of the rod body, and the rotation directions of the two sections of external threads are opposite; the rotating part is positioned at the joint of the two sections of external threads, and the rod body is rotatably arranged in the mounting seat through the rotating part; the driving motor is arranged on the mounting seat and connected with the bidirectional screw rod to drive the bidirectional screw rod to rotate; the traction mechanism is provided with two, sets up two external screw threads at two-way lead screw respectively, and an integrated two-way electric drive device can accomplish the assembly when dispatching from the factory to install on electric bed bedstead, can pack simultaneously along with the electric motor car, transport, need not to carry out secondary installation in customer department, it is very convenient, and the device is hidden in the bedstead, can improve pleasing to the eye degree.
Description
Technical Field
The utility model belongs to the field of electric beds, and particularly relates to an integrated bidirectional electric driving device and an integrated bidirectional electric driving bed.
Background
The life of a person is longer than a quarter of the time in a bed, and with the advancement of technology and the improvement of material level, the use requirement of the person on the bed is not limited to lying down, and the bed also comprises various use ways such as physiotherapy, recreation and the like. Therefore, in order to meet the different use situations of the "bed" of the user, the "bed" needs to have a more intelligent structure scene, so as to ensure the comfort of the user in different use situations.
The existing electric bed generally comprises a fixed bed plate and a movable bed plate, a beam of the bed is pushed by an electric driving device with high pushing force, the pushing force of the electric driving device is converted into torsion force of the beam, and then the movable bed plate is driven to overturn, so that the aim of changing the structural angle of the bed body is fulfilled. An electric bed as shown in patent CN206576621U, by arranging two motors to drive different push rods to extend respectively, the purpose of changing the angle of the bed body structure is achieved. Although the structure is simple and reliable, the two motor driving devices are arranged, so that the overall cost is high, the field installation is required, and the improvement is required.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art and provides an integrated bidirectional electric driving device and an electric bed thereof.
The utility model adopts the following technical scheme:
An integrated bidirectional electric driving device comprises a mounting seat, a bidirectional screw rod, a driving motor, a traction mechanism and a transmission mechanism,
The bidirectional screw rod is rotatably arranged in the mounting seat and comprises a rod body, external threads and a rotating part, and the rod body is integrally formed; external threads are formed on the surface of the rod body along opposite directions from two ends of the rod body, and the rotation directions of the two sections of external threads are opposite; the rotating part is positioned at the joint of the two sections of external threads, and the rod body is rotatably arranged in the mounting seat through the rotating part;
The driving motor is arranged on the mounting seat and connected with the bidirectional screw rod to drive the bidirectional screw rod to rotate;
The two traction mechanisms are respectively arranged on two external threads of the bidirectional screw rod and can synchronously move in opposite directions or in opposite directions along with the rotation of the bidirectional screw rod, and the traction mechanisms comprise traction blocks and steel wire ropes, wherein the traction blocks can be arranged on the bidirectional screw rod in a back-and-forth moving way; one end of the steel wire rope is connected with the traction block, and the other end of the steel wire rope extends outwards along the moving direction of the traction block and is connected with a structure to be drawn;
the transmission mechanism is arranged between the driving motor and the bidirectional screw rod to transmit the torque output by the driving motor.
Preferably, the device further comprises limiting mechanisms respectively arranged at two ends of the bidirectional screw rod, wherein each limiting mechanism comprises a limiting block, screw rod holes, a micro switch and a controller, and the limiting blocks are fixedly arranged at two ends of the bidirectional screw rod; the screw rod hole is formed on the limiting block, and the bidirectional screw rod is rotatably arranged in the screw rod hole; the micro switch is arranged on the limiting block and is opposite to the traction block; the controller is respectively connected with the micro switch and the driving motor and controls the driving motor to work.
Preferably, the limiting mechanism further comprises a communication hole formed on the limiting block and through which the steel wire rope can pass, and an oil filling hole formed in a manner of sinking downwards from the top of the limiting block and communicated with the communication hole at the bottom.
Preferably, the device further comprises a shell arranged on the outer side of the bidirectional screw rod, a sliding channel for the traction block to move is formed in the shell, the shape of the sliding channel is matched with that of the traction block, and the traction block can be limited to move horizontally in the shell along with the rotation of the bidirectional screw rod.
Preferably, the transmission mechanism comprises a worm and a worm wheel, wherein the worm is arranged on the driving motor, is connected with the output end of the driving motor and rotates along with the output end of the driving motor; the worm wheel is formed on the rotating part and matched with the worm, and the worm is used for driving the worm wheel to rotate so as to drive the bidirectional screw rod to rotate.
Preferably, the mounting seat is provided with a mounting groove for mounting the bidirectional screw rod, and a bearing matched with the rotating part is arranged in the mounting groove.
An electric bed comprising an integrated bidirectional electric driving device as set forth in any one of the above, and further comprising a bed board, a bed frame and a turnover mechanism, wherein the bed board is connected with the turnover mechanism and can drive the bed board to turn over; the bed frame is arranged at the bottom of the bed board, and an integrated bidirectional electric driving device is arranged in the bed frame; the turnover mechanism is connected with two ends of an integrated bidirectional electric driving device to drive the bed board to turn over.
Preferably, the frame and the shell of the integrated bidirectional electric driving device are of the same structure, an auxiliary wheel is further arranged in the frame, the height of the auxiliary wheel is the same as the connection point of the steel wire rope and the traction block, and the steel wire rope is horizontally erected on the auxiliary wheel along the length direction of the bidirectional screw rod.
As can be seen from the above description of the present utility model, compared with the prior art, the present utility model has the following beneficial effects: the bidirectional screw rod is integrally formed, can be machined and formed at one time, has short machining time, can realize simultaneous output in two directions only by being connected with one motor, greatly reduces the weight of the device, reduces the production cost, and realizes bidirectional output through traction mechanisms on two sides;
The two ends of the bidirectional screw rod are arranged in the screw rod holes so as to improve the rotation stability of the bidirectional screw rod, and when the traction block moves and gradually approaches the limiting block to contact the micro switch, the controller controls the driving motor to stop according to signals fed back by the micro switch, so that the limiting block is prevented from impacting the limiting block for a long time to influence the service life of the device;
the steel wire rope passes through the communication hole, so that the pulling stability of the steel wire rope can be improved, shaking is avoided, a lubricating effect can be provided for the steel wire rope through the oil filling hole, and the pulling stability is further improved;
The integrated bidirectional electric driving device can be assembled when leaving the factory and is installed on an electric bed frame, can be packaged and transported simultaneously along with an electric vehicle, does not need to be installed secondarily at a customer, is extremely convenient, and is hidden in the bed frame, so that the attractiveness can be improved.
Drawings
FIG. 1 is a schematic view of the structure of the electric bed of the present utility model;
FIG. 2 is a schematic diagram of a driving apparatus according to the present utility model;
FIG. 3 is a schematic diagram of a driving device according to a second embodiment of the present utility model;
FIG. 4 is an enlarged view of a portion of FIG. 2 at A;
FIG. 5 is a partial enlarged view at B in FIG. 3;
FIG. 6 is a schematic view of the structure of the bed board and the bed frame of the present utility model;
FIG. 7 is a schematic view of a single-sided frame of the present utility model;
FIG. 8 is a schematic diagram of a turnover mechanism according to the present utility model;
FIG. 9 is a second schematic structural view of the turnover mechanism of the present utility model;
In the figure: 1-mount, 11-mounting groove, 2-bi-directional screw rod, 21-rod body, 22-external screw thread, 23-rotating part, 3-driving motor, 4-traction mechanism, 41-traction block, 42-wire rope, 5-transmission mechanism, 51-worm, 52-worm wheel, 6-limit mechanism, 61-limit block, 62-screw rod hole, 63-micro switch, 64-communication hole, 65-oil filler hole, 7-bed board, 71-limit plate, 72-first shaft hole, 73-rotation shaft, 8-bed frame, 81-auxiliary wheel, 82-longitudinal pipe, 83-transverse pipe, 84-second shaft hole, 9-turnover mechanism, 91-rotation connecting rod, 92-turnover assembly, 921-first fixed pulley, 922-second fixed pulley, 93-roller, 94-movable pulley, 95-lock catch and 96-accommodation groove.
Detailed Description
The utility model is further described below by means of specific embodiments.
Referring to fig. 1 to 9, an electric bed comprises a mounting seat 1, a bidirectional screw rod 2, a driving motor 3, a traction mechanism 4, a transmission mechanism 5, a limiting mechanism 6, a bed plate 7, a bed frame 8 and a turnover mechanism 9.
The mounting seat 1 is provided with a mounting groove 11 for mounting the bidirectional screw rod 2.
The bidirectional screw rod 2 is rotatably arranged in the mounting seat 1 and comprises a rod body 21, external threads 22 and a rotating part 23, wherein the rod body 21 is integrally formed; external threads 22 are formed on the surface of the rod body 21 along opposite directions from two ends of the rod body 21, and the rotation directions of the two sections of external threads 22 are opposite; the rotating part 23 is positioned at the joint of the two sections of external threads 22, the rod body 21 is rotatably arranged in the mounting groove 11 of the mounting seat 1 through the rotating part 23, and a bearing matched with the rotating part 23 is arranged in the mounting groove 11.
The driving motor 3 is arranged on the mounting seat 1 and is connected with the bidirectional screw rod 2 to drive the bidirectional screw rod to rotate.
The two traction mechanisms 4 are respectively arranged on two external threads 22 of the bidirectional screw rod 2 and can synchronously move in opposite directions or in opposite directions along with the rotation of the bidirectional screw rod 2, and comprise traction blocks 41 and steel wire ropes 42, wherein the traction blocks 41 can be arranged on the bidirectional screw rod 2 in a back-and-forth movement manner; one end of the steel wire rope 42 is connected with the traction block 41, and the other end of the steel wire rope extends outwards along the moving direction of the traction block 41 and is connected with a structure required to be drawn. Specifically, the device comprises a shell arranged on the outer side of the bidirectional screw rod 2, wherein a sliding channel for the traction block 41 to move is formed in the shell, the shape of the sliding channel is matched with that of the traction block 41, and the traction block 41 can be limited to move horizontally in the shell along with the rotation of the bidirectional screw rod 2.
The transmission mechanism 5 is arranged between the driving motor 3 and the bidirectional screw rod 2 to transmit the torque output by the driving motor 3, the transmission mechanism 5 comprises a worm 51 and a worm wheel 52, the worm 51 is arranged on the driving motor 3, and is connected with the output end of the driving motor 3 and rotates along with the output end of the driving motor 3; the worm wheel 52 is formed on the rotating part 23 and is matched with the worm 51, and the worm 51 drives the worm wheel 52 to rotate so as to drive the bidirectional screw rod 2 to rotate.
The limiting mechanisms 6 are arranged at two ends of the bidirectional screw rod 2. The limiting mechanism 6 comprises a limiting block 61, a screw rod hole 62, a micro switch 63 and a controller, wherein the limiting block 61 is fixedly arranged at two ends of the bidirectional screw rod 2; the screw rod hole 62 is formed on the limiting block 61, and the bidirectional screw rod 2 is rotatably arranged in the screw rod hole 62; the microswitch 63 is arranged on the limiting block 61 and is opposite to the traction block 41; the controller is connected with the micro-gap switch 63 and the driving motor 3 respectively and controls the driving motor 3 to work, two ends of the bidirectional screw rod 2 are arranged in the screw rod holes 62 to improve the rotating stability of the bidirectional screw rod 2, and when the traction block 41 moves and gradually approaches the limiting block 61 to contact the micro-gap switch 63, the controller controls the driving motor 3 to stop according to the signal fed back by the micro-gap switch 63, so that the limiting block 61 is prevented from impacting the limiting block 61 for a long time to influence the service life of the device. Specifically, the limiting mechanism 6 further comprises a communication hole 64 formed on the limiting block 61 and allowing the steel wire rope 42 to pass through, and an oil filling hole 65 formed from the top of the limiting block 61 in a downward sinking mode and communicated with the communication hole 64 at the bottom, the steel wire rope 42 passes through the communication hole 64, so that the pulling stability of the steel wire rope 42 can be improved, shaking is avoided, a lubricating effect can be provided for the steel wire rope 42 through the oil filling hole 65, and the pulling stability is further improved.
The bed board 7 is connected with a turnover mechanism 9, and the bed board 7 can be driven to turn over by the turnover mechanism. The bedstead 8 is arranged at the bottom of the bed board 7, the driving device is arranged in the bedstead 8, assembly can be completed when leaving the factory, the driving device is arranged on the electric bed bedstead 8, the driving device can be packaged and transported simultaneously along with an electric vehicle, secondary installation at a customer is not needed, the driving device is extremely convenient, and the driving device is hidden in the bedstead 8, so that the attractiveness can be improved. The turnover mechanism 9 is connected with steel wire ropes 42 at two ends of the driving device, and the turnover mechanism 9 is driven to work by the steel wire ropes. Specifically, the bed frame 8 and the shell are of the same structure, the bed frame 8 is also provided with an auxiliary wheel 81, the height of the auxiliary wheel 81 is the same as the connection point of the steel wire rope 42 and the traction block 41, and the steel wire rope 42 is horizontally erected on the auxiliary wheel 81 along the length direction of the bidirectional screw rod 2.
The bed board 7 is rotatably arranged on the bed frame 8; the bed frame 8 comprises a longitudinal pipe 82 arranged along the length direction of the bed plate 7 and a transverse pipe 83 formed along the width direction of the bed plate 7, the bottom surface of the bed plate 7 is also provided with limiting plates 71, two pairs of limiting plates 71 are arranged, and a limiting space for embedding the transverse pipe 83 is formed in the two pairs of limiting plates 71. A plurality of first shaft holes 72 are formed in one side of the bed plate 7, second shaft holes 84 corresponding to the first shaft holes 72 one by one are formed in the bed frame 8, and the bed plate 7 is connected with the bed frame 8 by sequentially penetrating through the first shaft holes 72 and the rotating shafts 73 of the second shaft holes 84.
The turnover mechanism 9 is arranged in the bed frame 8 and is connected with the bed plate 7 to drive the bed plate 7 to turn, the turnover mechanism 9 comprises a rotary connecting rod 91 and a reversing assembly 92, the rotary connecting rod 91 is rotatably arranged in the bed frame 8 along the rotation direction of the bed plate 7, the top surface of the rotary connecting rod 91 is contacted with the bed plate 7 to push the bed plate 7 to rotate, and the rotation direction of the rotary connecting rod 91 is consistent with the rotation direction of the bed plate 7 around the rotation shaft 73; one end of the steel wire rope 42 is arranged in the transverse pipe 83 and is connected with the rotary connecting rod 91 to drive the rotary connecting rod 91 to rotate, and the other end of the steel wire rope extends into the longitudinal pipe 82 through the transverse pipe 83 and is connected with the traction block 41 arranged in the longitudinal pipe 82 to drive the steel wire rope 42 to stretch and retract so as to drive the rotary connecting rod 91 to rotate; the reversing assembly 92 is arranged at the joint of the transverse pipe 83 and the longitudinal pipe 82, the steel wire rope 42 is arranged on the reversing assembly 92 to transmit driving force, the steel wire rope 42 drives the rotary connecting rod 91 to rotate so as to rotate the bed plate 7 along the rotation direction of the rotary connecting rod 91, and the electric push rod driving structure of the traditional intelligent bed is changed into a steel wire rope 42 driving mode and hidden in the bed body frame, so that the whole structure is more concise and attractive, and the structural safety is improved; simultaneously, make the whole of bearing frame avoid appearing receiving the curved structure of buckling, can reduce weight and reduce cost. Specifically, two turnover mechanisms 9 are provided, and are respectively located in transverse pipes 83 at the front end and the rear end of the bed frame 8 and opposite to the two ends of the bed board 7, and steel wire ropes 42 of the two turnover mechanisms 9 extend into the longitudinal pipes 82 along the transverse pipes 83 to be connected with the two traction mechanisms 4, and the turnover mechanisms 9 are respectively located at the two sides of the bed board 7, so that the stability of the electric bed during turnover can be further improved. Further, the turnover mechanism 9 further comprises a roller 93, the roller 93 is rotatably arranged at the top of the rotary connecting rod 91 and can be slidably connected with the bottom surface of the bed plate 7, and friction force between the rotary connecting rod 91 and the bed plate 7 is reduced.
The reversing assembly 92 comprises a first fixed pulley 921 and a second fixed pulley 922, the first fixed pulley 921 being arranged in the longitudinal tube 82 with the rotational axis perpendicular to the direction of extension of the wire rope 42; the second fixed pulley 922 is arranged in the transverse pipe 83 and is positioned above the first fixed pulley 921 to receive the steel wire rope 42 and change the extending direction, and the reversing component 92 can smoothly reverse the steel wire rope 42, so that the electric bed is prevented from being damaged due to friction between forced reversing and the bed frame 8. Specifically, the turnover mechanism 9 further includes a movable pulley 94 and a lock catch 95, the movable pulley 94 is rotatably disposed on the rotary link 91, and a receiving groove 96 capable of receiving the movable pulley 94 is formed in the rotary link 91; a lock catch 95 is fixedly arranged in the transverse tube 83 near the second fixed pulley 922, and the wire rope 42 is wound around the movable pulley 94 via the second fixed pulley 922 and extends backwards to the lock catch 95 for fixation.
The bidirectional screw rod 2 is integrally formed, can be machined and formed once, has short machining time, can realize simultaneous output in two directions only by being connected with one motor, greatly reduces the weight of the device, reduces the production cost, realizes bidirectional output through the traction mechanisms 4 on two sides, and has high practicability. The electric push rod driving structure of the traditional intelligent bed is changed into a steel wire rope 42 driving mode and hidden in the bed body frame, so that the whole structure is more concise and attractive, and the structural safety is improved; simultaneously, make the whole of bearing frame avoid appearing receiving the curved structure of buckling, can reduce weight and reduce cost.
The foregoing description is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, i.e., the utility model is not to be limited to the details of the claims and the description, but rather is to cover all modifications which are within the scope of the utility model.
Claims (8)
1. An integrated bi-directional electric drive, characterized by: comprises a mounting seat, a bidirectional screw rod, a driving motor, a traction mechanism and a transmission mechanism,
The bidirectional screw rod is rotatably arranged in the mounting seat and comprises a rod body, external threads and a rotating part, and the rod body is integrally formed; external threads are formed on the surface of the rod body along opposite directions from two ends of the rod body, and the rotation directions of the two sections of external threads are opposite; the rotating part is positioned at the joint of the two sections of external threads, and the rod body is rotatably arranged in the mounting seat through the rotating part;
The driving motor is arranged on the mounting seat and connected with the bidirectional screw rod to drive the bidirectional screw rod to rotate;
The two traction mechanisms are respectively arranged on two external threads of the bidirectional screw rod and can synchronously move in opposite directions or in opposite directions along with the rotation of the bidirectional screw rod, and the traction mechanisms comprise traction blocks and steel wire ropes, wherein the traction blocks can be arranged on the bidirectional screw rod in a back-and-forth moving way; one end of the steel wire rope is connected with the traction block, and the other end of the steel wire rope extends outwards along the moving direction of the traction block and is connected with a structure to be drawn;
the transmission mechanism is arranged between the driving motor and the bidirectional screw rod to transmit the torque output by the driving motor.
2. An integrated bi-directional electric drive as set forth in claim 1 wherein: the two-way screw rod is fixedly arranged at the two ends of the two-way screw rod, and the two-way screw rod is fixedly connected with the two ends of the two-way screw rod; the screw rod hole is formed on the limiting block, and the bidirectional screw rod is rotatably arranged in the screw rod hole; the micro switch is arranged on the limiting block and is opposite to the traction block; the controller is respectively connected with the micro switch and the driving motor and controls the driving motor to work.
3. An integrated bi-directional electric drive as set forth in claim 2 wherein: the limiting mechanism further comprises a communication hole formed on the limiting block and allowing the steel wire rope to pass through, and an oil filling hole formed in a downward sunken mode from the top of the limiting block and communicated with the communication hole at the bottom.
4. An integrated bi-directional electric drive as set forth in claim 1 wherein: the bidirectional screw rod is characterized by further comprising a shell arranged on the outer side of the bidirectional screw rod, wherein a sliding channel for the traction block to move is formed in the shell, the shape of the sliding channel is matched with the traction block, and the traction block can be limited to move horizontally in the shell along with the rotation of the bidirectional screw rod.
5. An integrated bi-directional electric drive as set forth in claim 1 wherein: the transmission mechanism comprises a worm and a worm wheel, wherein the worm is arranged on the driving motor, is connected with the output end of the driving motor and rotates along with the output end of the driving motor; the worm wheel is formed on the rotating part and matched with the worm, and the worm is used for driving the worm wheel to rotate so as to drive the bidirectional screw rod to rotate.
6. An integrated bi-directional electric drive as set forth in claim 1 wherein: the mounting seat is provided with a mounting groove for mounting the bidirectional screw rod, and a bearing matched with the rotating part is arranged in the mounting groove.
7. An electric bed, characterized in that: an integrated bi-directional electric drive comprising the apparatus of any one of claims 1 to 6, further comprising a bed board, a bed frame, and a turnover mechanism, the bed board being connected to the turnover mechanism for driving the bed board to turn over; the bed frame is arranged at the bottom of the bed board, and an integrated bidirectional electric driving device is arranged in the bed frame; the turnover mechanism is connected with two ends of an integrated bidirectional electric driving device to drive the bed board to turn over.
8. An electric bed as claimed in claim 7, characterized in that: the frame and the shell in the integrated bidirectional electric driving device are of the same structure, an auxiliary wheel is further arranged in the frame, the height of the auxiliary wheel is the same as that of the connection point of the steel wire rope and the traction block, and the steel wire rope is horizontally erected on the auxiliary wheel along the length direction of the bidirectional screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322483435.3U CN220898332U (en) | 2023-09-13 | 2023-09-13 | Integrated bidirectional electric driving device and electric bed thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322483435.3U CN220898332U (en) | 2023-09-13 | 2023-09-13 | Integrated bidirectional electric driving device and electric bed thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220898332U true CN220898332U (en) | 2024-05-07 |
Family
ID=90909149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322483435.3U Active CN220898332U (en) | 2023-09-13 | 2023-09-13 | Integrated bidirectional electric driving device and electric bed thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220898332U (en) |
-
2023
- 2023-09-13 CN CN202322483435.3U patent/CN220898332U/en active Active
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