CN216789152U - Multi-component linkage coupling device - Google Patents
Multi-component linkage coupling device Download PDFInfo
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- CN216789152U CN216789152U CN202123424250.2U CN202123424250U CN216789152U CN 216789152 U CN216789152 U CN 216789152U CN 202123424250 U CN202123424250 U CN 202123424250U CN 216789152 U CN216789152 U CN 216789152U
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Abstract
A multi-component linkage coupling device comprises a base, a moving component, at least one first connecting component, at least one second connecting component and a driving component, wherein the first connecting component and the second connecting component are arranged on the moving component, the driving component comprises a driving mechanism and a driving shaft, the moving component is arranged on the driving shaft, the driving mechanism drives the driving shaft to rotate and drives the moving component to move along the driving shaft so as to drive each first connecting component and each second connecting component to move towards a target body to be connected with the target body. The multi-component linkage coupling device can realize linkage of a plurality of connecting components, reduces the structural complexity of the device, reduces the volume of the device and reduces the cost; the linkage process is simple to operate, and the control difficulty is low.
Description
Technical Field
The application relates to the field of mechanical equipment, in particular to a multi-component linkage coupling device.
Background
In the process of separating a biological sample by adopting sample processing equipment, a separation chip needs to be fixed and vacuumized, and the fixing and vacuuming need independent modules to be connected with the separation chip respectively. In the traditional sample processing equipment, each module needs to be driven by an independent driving mechanism, and the sample processing equipment has a complex structure, a large volume, a large occupied space and high cost; each driving mechanism needs to be controlled independently, the operation is complex, and the control difficulty is high.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need for a multi-component linkage coupling that solves the above problems.
The application provides a multi-component linkage coupling device, this multi-component linkage coupling device includes:
a base;
the moving assembly is arranged on the base;
the first connecting assembly is arranged on the moving assembly;
the second connecting assembly is arranged on the moving assembly; and
the driving assembly comprises a driving mechanism arranged on the base and a driving shaft arranged on an output shaft of the driving mechanism, and the moving assembly is arranged on the driving shaft;
the driving mechanism is used for driving the driving shaft to rotate, driving the moving assembly to move along the driving shaft so as to drive each of the first connecting assemblies and each of the second connecting assemblies to move towards a target body so as to be connected with the target body.
In some possible embodiments, the first connecting assembly includes a sliding module disposed on the moving assembly, a connecting portion disposed on the sliding module, and an elastic member, and two ends of the elastic member are respectively connected to the moving assembly and the sliding module; the driving mechanism is used for driving the driving shaft to rotate to drive the connecting part to be connected with the target body, so that the sliding module is driven to move along the direction of the driving shaft away from the target body to compress the elastic piece, and the elastic restoring force of the elastic piece is used for pushing the connecting part to abut against the target body.
In some possible embodiments, the number of the first connecting assemblies is two, the two first connecting assemblies are arranged oppositely, and the driving mechanism is configured to drive the driving shaft to rotate, so as to drive the two first connecting assemblies to move oppositely to abut against the target body.
In some possible embodiments, the connecting portion includes a vibrating member disposed on the sliding module, and the vibrating member is configured to abut against a surface of the target.
In some possible embodiments, the moving assembly includes a first slide rail disposed on the base, two first slide blocks slidably disposed on the first slide rail, and a first mounting plate disposed on each of the first slide blocks, one of the slide modules is disposed on each of the first mounting plates, and the second connecting assembly is disposed on at least one of the first mounting plates.
In some possible embodiments, the sliding module includes a second slide rail disposed on the corresponding first mounting plate, a second slide block slidably disposed on the second slide rail, and a second mounting plate disposed on the second slide block, and both ends of the elastic member are respectively connected to the first mounting plate and the second mounting plate.
In some possible embodiments, the second connection assembly includes an adapter portion disposed on the moving assembly and a communication pipe having one end connected to the adapter portion, the communication pipe is communicated with the vacuum device through the adapter portion, and the driving mechanism is configured to drive the driving shaft to rotate, so as to drive the communication pipe to move, so that the end of the communication pipe away from the adapter portion is communicated with the opening of the target, and the target is communicated with the vacuum device.
In some possible embodiments, the second connection assembly further includes an elastic sleeve sleeved on the communication pipe.
In some possible embodiments, the number of the second connecting assemblies is two, the two second connecting assemblies are arranged oppositely, and the driving mechanism is used for driving the driving shaft to rotate so as to drive the two second connecting assemblies to move oppositely to communicate with the target body.
In some possible embodiments, the multi-component linkage coupling device further includes a displacement sensing component, the displacement sensing component includes the first connecting plate, a second connecting plate, and an optical coupling piece disposed on the first connecting plate, the first connecting plate and the second connecting plate are respectively fixed on the two first mounting plates, one end of the second connecting plate close to the first connecting plate is slidably connected to the optical coupling piece, the driving mechanism is further configured to drive the first connecting plate and the second connecting plate to move along the driving shaft, and the optical coupling piece is configured to sense a relative movement distance between the first connecting plate and the second connecting plate.
In some possible embodiments, the multi-component linkage coupling device further includes a stopper disposed on the base.
Compared with the prior art, the multi-component linkage coupling device provided by the application can drive the first connecting component and the second connecting component to be linked through the combination of one driving component and the moving component, so that the first connecting component and the second connecting component are connected with a target body, the first connecting component and the second connecting component do not need to be driven independently, the structural complexity of the multi-component linkage coupling device is reduced, the size of the multi-component linkage coupling device is reduced, and the cost is reduced; the linkage process is simple to operate, and the control difficulty is low; in addition, the functions that can be realized after first coupling assembling and second coupling assembling and the target body coupling are connected are various, can adapt to more application scenarios.
Drawings
FIG. 1 is a schematic front view of a multi-component linkage coupling device according to one embodiment of the present application.
FIG. 2 is a schematic view of a multi-component linkage coupling device according to another embodiment of the present application.
Fig. 3 is a schematic structural diagram of a first connection assembly in another embodiment of the present application.
FIG. 4 is a cross-sectional view of a second connector assembly according to an embodiment of the present application.
FIG. 5 is a rear view of a multi-component linkage coupling device according to one embodiment of the present application.
Description of the main elements
Multi-component linkage coupling device 100
Moving assembly 2,2a
First slide rail 21
First connecting component 3,3a
Connecting parts 32,36
Second connecting assembly 4
First connecting piece 61
Second connecting piece 62
Position limiting member 7
The following detailed description will further illustrate the present application in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present application provides a multi-component linkage coupling device 100, wherein the multi-component linkage coupling device 100 is used for coupling with a target (which may be a separation chip) in a biological sample separation apparatus, and the coupling includes, but is not limited to, abutting, attaching, communicating, and the like. Wherein the abutment and attachment may perform a variety of functions, such as providing a clamping force to the target, providing a vibration wave to the target, etc. The multi-component linkage coupling device 100 comprises a base 1, a moving component 2, at least one first connecting component 3 and at least one second connecting component 4 which are arranged on the moving component 2, and a driving component 5. The driving assembly 5 comprises a driving mechanism 51 arranged on the base 1 and a driving shaft 52 arranged at the output end of the driving mechanism 51, and the moving assembly 2 is arranged on the driving shaft 52. The driving mechanism 51 is configured to drive the driving shaft 52 to rotate, so as to drive the moving assembly 2 to move along the driving shaft 52, and further drive each of the first connecting assemblies 3 and each of the second connecting assemblies 4 to move toward the target 10 to connect with the target 10. In this embodiment, the target 10 is the above-mentioned discrete chip.
Referring to fig. 1, the first connecting assemblies 3 are two and oppositely disposed, the moving assembly 2 includes a first slide rail 21 disposed on the base 1, two first slide blocks 22 disposed on the first slide rail 21, and a first mounting plate 23 disposed on each first slide block 22, and each first mounting plate 23 is provided with one first connecting assembly 3 and one first mounting plate 23. The driving mechanism 51 can drive the driving shaft 52 to rotate, so as to drive the two first mounting plates 23 and the first connecting assemblies 3 thereon to move towards or away from each other, so as to connect or release the target 10.
It is understood that in other embodiments, as shown in fig. 2, one side of the base 1 is provided with the moving component 2a, and the moving component 2a is provided with the first connecting component 3 and the second connecting component 4. The moving assembly 2a may include a first slider 24 and a first mounting plate 25, and the first connecting assembly 3 and the second connecting assembly 4 may be simultaneously located on the first mounting plate 25, so as to achieve the purpose of simultaneously driving the first connecting assembly 3 and the second connecting assembly 4 to be connected with the target 10. It will also be appreciated that in other embodiments, two sets of moving assemblies 2a may be disposed on opposite sides of the target 10, and each set of moving assemblies 2a has the first connecting assembly 3 and the second connecting assembly 4 disposed thereon, so as to drive the two sets of first connecting assemblies 3 and second connecting assemblies 4 to connect the target 10 from opposite sides simultaneously.
Referring to fig. 1, in the present application, two first connecting assemblies 3 on the moving assembly 2 are used for clamping and fixing the object 10 from two opposite sides of the object 10, so that unnecessary positioning mechanisms can be reduced, and the structure of the apparatus can be simplified.
The first connecting assembly 3 includes a sliding module 31 provided on the first mounting plate 23, a connecting portion 32 provided on the sliding module 31, and an elastic member 33. Both ends of the elastic member 33 are respectively disposed on the first mounting plate 23 and the sliding module 31. The driving mechanism 51 is configured to drive the driving shaft 52 to rotate, so as to drive the connecting portion 32 to contact with the target 10, the connecting portion 32 drives the sliding module 31 to move along the driving shaft 52 in a direction away from the target 10 under the action of a reaction force of the target 10, so as to compress the elastic member 33, and an elastic restoring force of the elastic member 33 is configured to push the connecting portion 32 to abut against the target 10.
Further, the sliding module 31 includes a second sliding rail 311 disposed on the first mounting plate 23, a second sliding block 312 slidably disposed on the second sliding rail 311, and a second mounting plate 313 disposed on the second sliding block 312, the connecting portion 32 is disposed on the second mounting plate 313, and two ends of the elastic member 33 are respectively connected to the first mounting plate 23 and the second mounting plate 313. After the connecting portion 32 contacts the target body 10, the connecting portion 32 is forced to move in a direction away from the target body 10, so as to drive the second mounting plate 313 to move, the elastic member 33 is compressed, when the driving assembly 5 further drives the first mounting plate 23 to move towards the target body 10, the elastic force of the elastic member 33 pushes the connecting portion 32 to press against the target body 10, so that the connecting portion 32 and the target body 10 are elastically clamped and fixed, rigid connection of the target body 10 is avoided, and the risk of damage of the connecting portion 32 to the target body 10 is reduced in the clamping process.
Further, the elastic member 33 is a spring, and the clamping force of the connecting portion 32 on the target body 10 is controlled by adjusting the hooke elastic coefficient of the elastic member 33 and the distance of the connecting portion 32 moving toward each other. In this embodiment, the distance of the two connecting portions 32 moving toward each other is about 6mm, and the spring hooke's coefficient of the elastic member 33 is 1200N/m, so that the single-side holding force received by the target body 10 is about 3.2N.
Referring to fig. 1 and 4, the multi-component linkage coupling device 100 of the present application is used for coupling and connecting a separation chip of a biological sample processing apparatus, and in addition to clamping and fixing the separation chip, a vibration member is required to provide a vibration wave to the separation chip during a process of separating a biological sample. The present application achieves providing a vibration wave to the target 10 by the first connecting assembly 3. Specifically, the connecting portion 32 includes an oscillating member 321, and one end of the oscillating member 321 is fixed to the second mounting plate 313, and the other end of the oscillating member 321 can abut against the surface of the target 10 and transmit the oscillating wave to the target 10. The vibrating element 321 of the first connecting member 3 is attached to the target 10 so as to transmit the vibration wave to the target 10. The driving mechanism 51 is configured to drive the driving shaft 52 to rotate, so as to drive the vibrating element 321 to move, so that the vibrating element 321 is attached to the surface of the target 10, and the vibration wave is transmitted to the target 10.
It should be understood that, referring to fig. 3, in other embodiments, the first connecting assembly 3a includes a guide rod 34 fixed on the first mounting plate 25, a second sliding block 35 slidably sleeved on the guide rod 34, a connecting portion 36 disposed on the second sliding block 35, and an elastic member 37 sleeved on the guide rod 34. One end of the elastic element 37 abuts against the side wall of the second sliding block 35, and the other end abuts against the side wall of the first mounting plate 25. It will be appreciated that the structure of the first connection assembly 3a may also be provided on the first mounting plate 23. Referring to fig. 1, the rotation of the driving shaft 52 can drive the two first mounting plates 23 to move towards each other, and further drive the connecting portion 36 to contact with the target 10, the connecting portion 36 is pushed by the reaction force of the target 10 to move towards the direction away from the target 10, and further the elastic member 37 is compressed, the elastic force of the elastic member 37 further pushes the connecting portion 36 to press the target 10, so that the connecting portion 36 is connected with the target 10.
Referring to fig. 1 and 4, the multi-component linkage coupling device 100 of the present application is used for coupling and connecting a separation chip of a biological sample processing apparatus, in a process of separating and processing a biological sample, the separation chip needs to be clamped and fixed, and the separation chip needs to be communicated with a vacuum apparatus through a pipeline, and the separation chip (i.e., a target 10) is communicated with the vacuum apparatus (not shown) through the second connection component 4. The second connecting assembly 4 comprises an adapter portion 41 arranged on the first mounting plate 23 and a communicating pipe 42 with one end connected with the adapter portion 41, the communicating pipe 42 is communicated with a vacuum device through the adapter portion 41, and the driving mechanism 51 is used for driving the driving shaft 52 to rotate so as to drive the adapter portion 41 and the communicating pipe 42 to move, so that one end, far away from the adapter portion 41, of the communicating pipe 42 is communicated with an opening of the target body 10, and the target body 10 is communicated with the vacuum device.
Further, the second connecting assembly 4 further includes an elastic sleeve 43 sleeved on the communication pipe 42. In the process of connecting the target body 10 to the vacuum apparatus, the connection pipe 42 needs to be connected to the opening of the target body 10 in a sealing manner, and therefore, the elastic sleeve 43 is added, so that the opening can be sealed after the connection pipe 42 is connected to the target body 10. In this embodiment, after the elastic sleeve 43 is sleeved on the communication pipe 42, one end of the elastic sleeve 43 is abutted against the side wall of the adapter 41, and the end surface of the other end of the elastic sleeve slightly exceeds the end surface of the communication pipe 42, so that after the communication pipe 42 is communicated with the opening of the target body 10, the elastic sleeve 43 can be compressed to seal the connection position. In this embodiment, the elastic sleeve 43 is made of a flexible material (e.g., rubber), and the compression amount of the elastic sleeve 43 can be adjusted to achieve a sealing effect. The specific compression amount of the elastic tube 43 is determined by the shore hardness of the elastic tube 43 and the driving force of the driving mechanism 51.
Further, two opposite side walls of the separation chip (the target body 10) are provided with openings, and therefore, the number of the second connecting assemblies 4 is two, and the two second connecting assemblies are respectively fixed on the corresponding first mounting plates 23. The driving mechanism 51 is configured to drive the driving shaft 52 to rotate, so as to drive the communicating pipes 42 in the two second connecting assemblies 4 to move in opposite directions to communicate with the target 10. It is understood that the driving assembly 5 can also drive the communicating tubes 42 to move away from the target 10.
Referring to fig. 1 and 5, the multi-component linkage coupling device 100 further includes a displacement sensing component 6, and the displacement sensing component 6 is used for measuring the moving distance of the first connecting component 3 and the second connecting component 4 during the moving process, so as to control the pressure of the connecting portion 32 and the elastic sleeve 43 on the target 10, as described in the foregoing analysis. The displacement sensing assembly 6 includes the first connecting plate 61, a second connecting plate 62 and an optical coupling member 63 disposed on the first connecting plate 61, the first connecting plate 61 and the second connecting plate 62 are respectively fixed on the two first mounting plates 23, and one end of the second connecting plate 62 close to the first connecting plate 61 is slidably connected to the optical coupling member 63. The driving mechanism 51 is further configured to drive the first connecting piece 61 and the second connecting piece 62 to move along the driving shaft 52, and the optical coupler 63 is configured to sense a relative movement distance between the first connecting piece 61 and the second connecting piece 62. In the process that the driving component 5 drives the first connecting component 3 and the second connecting component 4 to be linked, the displacement sensing component 6 senses the moving distance of the two connecting components, so that the connection between the two connecting components and the target body 10 can be better controlled, and the optimal connection effect is realized.
Referring to fig. 1 and fig. 5 again, the multi-component linkage coupling device 100 further includes a limiting member 7 disposed on the base 1. In this embodiment, three limiting members 7 are disposed at specific positions in the extending direction of the driving shaft 52, so as to respectively limit the moving distance of the two first sliding blocks 22, prevent the two first sliding blocks 22 from separating from the first sliding rail 21, and simultaneously prevent the two first sliding blocks 22 from colliding during the moving process.
When the device is used, when a target body 10 needs to be loaded on the biological sample processing device, the driving mechanism 51 drives the driving shaft 52 to rotate in the positive direction, so as to drive the two first sliding blocks 22 to move in the opposite directions, further drive the first connecting assembly 3 and the second connecting assembly 4 on the two first mounting plates 23 to move in the opposite directions, so that the two vibrating pieces 321 clamp and fix the target body 10 from the two opposite side surfaces and transmit vibration waves to the target body 10, wherein the clamping force on the target body 10 is the sum of the elastic forces of the two elastic pieces 33; meanwhile, the two communication pipes 42 are communicated with the two openings of the target body 10, the holding and fixing of the target body 10 and the communication with the vacuum apparatus are realized, and the sealing of the communication pipe 42 and the target body 10 is realized through the elastic sleeve 43. When the target object 10 needs to be unloaded, the driving mechanism 51 drives the driving shaft 52 to rotate reversely, so as to drive the first connecting assembly 3 and the second connecting assembly 4 to be far away from the target object 10, and the unloading of the target object 10 is realized. The application can adjust the ratio or/and the sum of the acting force of the first connecting assembly 3 to the target body 10 in a wide range by selecting the elastic member 33 with different hooke's modulus or/and adjusting the compression amount of the elastic member 33; the loading and unloading of the first connecting component 3 and the second connecting component 4 can be adjusted by adjusting the displacement of the moving component 2. It can be understood that the connection between the first connecting assembly 3 and the target 10 and the connection between the second connecting assembly 4 and the target 10 may occur simultaneously or may not occur simultaneously, and the connection between the two first connecting assemblies 3 or the connection between the two second connecting assemblies 4 and the target 10 may also occur simultaneously or may not occur simultaneously, specifically according to actual requirements. It is further understood that the functions performed by the first connecting assembly 3 and the second connecting assembly 4 coupled to the target 10 are not limited to the above two functions, and may be specifically designed according to actual needs.
Compared with the prior art, the multi-component linkage coupling device 100 provided by the application can drive the first connecting component 3 and the second connecting component 4 to be linked through the driving component 5 and the moving component 2, so that the first connecting component 3 and the second connecting component 4 are connected with the target body 10, the first connecting component 3 and the second connecting component 4 do not need to be driven independently, the structural complexity of the multi-component linkage coupling device 100 is reduced, the size of the multi-component linkage coupling device 100 is reduced, and the cost is reduced; the linkage process is simple to operate, and the control difficulty is low. In addition, the functions that can be realized after the first connecting assembly 3 and the second connecting assembly 4 are coupled and connected with the target body 10 are various, and the multifunctional connecting device can adapt to more application scenes.
Claims (10)
1. A multi-component ganged coupling, comprising:
a base;
the moving assembly is arranged on the base;
the first connecting assembly is arranged on the moving assembly;
the second connecting assembly is arranged on the moving assembly; and
the driving assembly comprises a driving mechanism arranged on the base and a driving shaft arranged on an output shaft of the driving mechanism, and the moving assembly is arranged on the driving shaft;
the driving mechanism is used for driving the driving shaft to rotate, driving the moving assembly to move along the driving shaft so as to drive each of the first connecting assemblies and each of the second connecting assemblies to move towards a target body so as to be connected with the target body.
2. The multi-component linkage coupling device according to claim 1, wherein the first connecting component comprises a sliding module disposed on the moving component, a connecting portion disposed on the sliding module, and an elastic member having two ends respectively connected to the moving component and the sliding module,
the driving mechanism is used for driving the driving shaft to rotate to drive the connecting part to be connected with the target body, so that the sliding module is driven to move along the direction of the driving shaft away from the target body to compress the elastic piece, and the elastic restoring force of the elastic piece is used for pushing the connecting part to abut against the target body.
3. The multi-component linkage coupling device according to claim 2, wherein the number of the first connecting components is two, two of the first connecting components are disposed opposite to each other, and the driving mechanism is configured to drive the driving shaft to rotate, so as to drive the two first connecting components to move toward each other to abut against the target.
4. The multi-component linkage coupling device of claim 3, wherein the connecting portion comprises a vibrating member disposed on the slide module for abutting against a surface of the target.
5. The linkage coupler according to claim 4, wherein the moving member comprises a first slide rail disposed on the base, two first slide blocks slidably disposed on the first slide rail, and a first mounting plate disposed on each of the first slide blocks, one sliding module is disposed on each of the first mounting plates, and the second connecting member is disposed on at least one of the first mounting plates.
6. The multi-component linkage coupling device according to claim 5, wherein the sliding module comprises a second sliding rail disposed on the corresponding first mounting plate, a second sliding block slidably disposed on the second sliding rail, and a second mounting plate disposed on the second sliding block, and two ends of the elastic member are respectively connected to the first mounting plate and the second mounting plate.
7. The linkage coupling device according to any one of claims 1 to 6, wherein the second connection assembly includes an adapter portion disposed on the movable assembly and a communication pipe having one end connected to the adapter portion, the communication pipe is communicated with a vacuum device through the adapter portion, the driving mechanism is configured to drive the driving shaft to rotate, so as to drive the communication pipe to move, so that the end of the communication pipe away from the adapter portion is communicated with the opening of the target body, and the target body is communicated with the vacuum device.
8. The multi-component linkage coupling device of claim 7, wherein the second connection component further comprises an elastic sleeve sleeved over the communication tube.
9. The multi-component linkage coupling device according to claim 7, wherein the number of the second connecting components is two, two of the second connecting components are disposed opposite to each other, and the driving mechanism is configured to drive the driving shaft to rotate, so as to drive the two second connecting components to move toward each other to communicate with the target.
10. The multi-component linkage coupling device according to claim 5, further comprising a displacement sensing component, wherein the displacement sensing component comprises the first connecting plate, a second connecting plate and an optical coupler disposed on the first connecting plate, the first connecting plate and the second connecting plate are respectively fixed on the two first mounting plates, one end of the second connecting plate close to the first connecting plate is slidably connected to the optical coupler, the driving mechanism is further configured to drive the first connecting plate and the second connecting plate to move along the driving shaft, and the optical coupler is configured to sense a relative movement distance between the first connecting plate and the second connecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123424250.2U CN216789152U (en) | 2021-12-31 | 2021-12-31 | Multi-component linkage coupling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123424250.2U CN216789152U (en) | 2021-12-31 | 2021-12-31 | Multi-component linkage coupling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216789152U true CN216789152U (en) | 2022-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123424250.2U Active CN216789152U (en) | 2021-12-31 | 2021-12-31 | Multi-component linkage coupling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216789152U (en) |
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2021
- 2021-12-31 CN CN202123424250.2U patent/CN216789152U/en active Active
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