CN219854403U - Contact type weak current signal control switch structure of electric nailing gun - Google Patents
Contact type weak current signal control switch structure of electric nailing gun Download PDFInfo
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- CN219854403U CN219854403U CN202321606038.4U CN202321606038U CN219854403U CN 219854403 U CN219854403 U CN 219854403U CN 202321606038 U CN202321606038 U CN 202321606038U CN 219854403 U CN219854403 U CN 219854403U
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- 238000005096 rolling process Methods 0.000 claims description 4
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- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 description 17
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- 238000005299 abrasion Methods 0.000 description 1
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Abstract
The utility model discloses a contact control switch structure of an electric nailing gun, which comprises a gun needle, a weak current signal detection probe arranged at the top of a gun body and positioned on a gun needle movement path, a controller and a weak power supply, wherein the controller is connected with the weak current signal detection probe; the weak power supply is taken from the power supply of the electric nailing gun; the gun needle always keeps contact with the weak current signal detection probe in the backward energy storage process after the nails are shot out, so that a closed loop is formed by the gun body, the gun needle, the weak current signal detection probe, the controller and a weak current source, and the controller drives the driving motor to work according to weak current closed loop signals; when the gun needle moves backwards and energy storage is about to be completed, the weak current signal detection probe is separated from the gun needle to disconnect a loop, so that the controller sends out a delay stop signal of the driving motor. The contact type weak current signal control switch structure designed by the utility model is a mechanical contact type weak current signal structure, and has the characteristics of high detection precision, simple structure, low cost and convenient later maintenance.
Description
Technical Field
The utility model relates to an electric nailing gun, in particular to a contact type weak current signal control switch structure of the electric nailing gun.
Background
The existing electric nailing gun mainly comprises a gun body, an energy storage mechanism, a gun needle driving mechanism and a nail box mechanism. The energy storage mechanism is arranged at the rear of the top of the gun body, the gun needle driving mechanism is arranged in the middle of the gun body, and the nail box mechanism is arranged at the front end of the gun body.
The gun needle driving mechanism mainly comprises a gun needle, a driving motor, a gearbox, an eccentric driving wheel and a relay device, wherein the rear end of the gun needle stretches into a nail gun energy storage mechanism with certain compressed air pressure and is movably hinged with a piston in the energy storage mechanism and keeps linkage, and the front end of the gun needle stretches into a nail box mechanism of the nail gun; the eccentric driving wheel is positioned at one side of the gun needle, and the relay device is positioned at the other side of the gun needle opposite to the eccentric driving wheel.
In the above structure, the eccentric driving wheel is required to rotate for two circles to complete one nailing working cycle, and the working cycle is as follows: in the initial state, the gun needle is positioned at the backward limit position and is positioned at the maximum energy storage position, when the trigger is pressed down, the driving motor is started, the reduction gearbox is started, the eccentric driving wheel starts to rotate for the first circle (left hand) and releases the gun needle hovering at the maximum energy storage position to continue rotating, at the moment, the gun needle is separated from the eccentric driving wheel, and the gun needle is subjected to high-speed forward punching under the action of compressed air pressure in the energy storage mechanism, so that nails sent to a nail outlet by the nail box mechanism are beaten, and the nailing operation purpose is achieved. When the nails are ejected, the eccentric driving wheel just rotates to a position capable of carrying out meshing transmission with the gun needle teeth and drives the gun needle to quickly move backwards for energy storage, the eccentric driving wheel is sequentially meshed with the rear four teeth of the gun needle to finish the rotation of the first circle, under the condition that the relay mechanism keeps the existing energy storage position of the gun needle, the eccentric driving wheel continues to rotate for the second circle and is sequentially meshed with the front four teeth to further drive the gun needle to move backwards for energy storage, and when the eccentric driving wheel approaches to the position separated from the gun needle teeth at the forefront end, the system delay stop switch is started, the driving motor is stopped, and the gun needle hovers at the maximum energy storage position, so that one working cycle is finished. At this time, the system has completed the energy storage preparation of next nailing duty cycle, can restart driving motor, hit the nail rapidly in the shortest time, realize the purpose of quick nailing. Therefore, the electric nailing gun is provided with a control switch for stopping the driving motor in a delayed manner after finishing a nailing working cycle.
At present, two traditional control switch structures are provided, namely a Hall sensing switch for detecting the rotation position of an eccentric driving wheel and a light sensing switch for detecting the movement position of a gun needle, but the two control switch structures have certain defects through years of use.
The Hall inductive switch picks up position signals by utilizing local magnetic field intensity change caused by the rotation of the eccentric driving wheel, the magnetic element generates relatively obvious magnetic force attenuation in operation and generates sudden change of magnetic force lines due to vibration, so that larger error exists in the accuracy of the picked-up position signals, and when a shutdown signal sent by the Hall inductive switch is too early or too late, the driving motor cannot be accurately stopped when the eccentric driving wheel is close to and separated from the front-end gun needle teeth, so that the gun needle is suspended in the operation failure of the maximum energy storage position, and the normal operation of the nail gun is finally influenced.
The light-sensitive switch is used for shielding or releasing the transmission of the light beam by utilizing the step arranged on the gun needle, so that the position signal of the gun needle is picked up, and further, the stop signal of the driving motor is sent out, and the stop operation is realized. However, the illuminant and the illuminant lens are easily shielded by dust, oil dirt and other dirt, so that the light beam is scattered or completely separated, and the operation of picking up the gun needle position signal is failed; meanwhile, the intensity of light in the working environment can cause disorder of the induction of the light receiver, so that the accurate pick-up of the gun needle position signal is affected; furthermore, the manufacturing cost of the light-sensitive switch is high, and the maintenance in the later period are difficult.
Disclosure of Invention
Aiming at the problems, the utility model designs a contact type weak current signal control switch structure of an electric nailing gun, which is a mechanical contact type weak current signal structure and has the characteristics of high detection precision, simple structure, low cost and convenient later maintenance.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a contact control switch structure of an electric nail gun is characterized in that: the gun mainly comprises a gun needle, a weak electric signal detection probe arranged at the top of a gun body and positioned on a gun needle movement path, a controller and a weak power supply; the weak power supply is taken from the power supply of the electric nailing gun; the gun needle always keeps contact with the weak current signal detection probe in the backward energy storage process after the nails are shot out, so that a closed loop is formed by the gun body, the gun needle, the weak current signal detection probe, the controller and a weak current source, and the controller drives the driving motor to work according to weak current closed loop signals; when the gun needle moves backwards and energy storage is about to be completed, the weak current signal detection probe is separated from the gun needle to disconnect a loop, so that the controller sends out a delay stop signal of the driving motor.
More specifically, the weak current signal detection probe comprises a mounting seat, wherein a mounting hole which is penetrated up and down is arranged in the mounting seat, a guide sleeve is arranged in the upper part of the mounting hole, a sliding block which can slide up and down relative to the guide sleeve is arranged in the guide sleeve, a mounting groove with a notch at the top is arranged in the middle of the top of the sliding block, a roller with the top protruding out of the mounting groove is arranged in the mounting groove, and the rolling direction of the roller is consistent with the moving direction of a gun needle; the sliding block is provided with a guide rail in vertical arrangement below the mounting groove, a transverse guide post is arranged in the guide rail, and the transverse guide post penetrates through the guide sleeve and is positioned on two side walls of the mounting seat; the lower end of the sliding block penetrates through the guide sleeve and extends into the lower part of the mounting hole, an elastic reset structure which enables the sliding block to always have an upward moving trend is arranged between the lower end of the sliding block and the mounting seat, and when the sliding block moves to the highest position, the roller at the top of the sliding block protrudes out of the top end surface of the mounting seat; one side of the gun needle is provided with an outer bulge which is pressed above the roller after the nail shooting is finished and in the energy storage process, and is separated from the roller when the gun needle moves backwards and energy storage is about to be finished.
More specifically, the front side of the outer bulge is provided with an inclined plane structure for reducing the impact of the high-speed forward movement of the gun needle on the roller.
More specifically, the lower part of the mounting seat is provided with a side through hole communicated with the mounting hole, the elastic reset structure comprises a T-shaped head structure below the sliding block and a reset spring sleeved on the T-shaped head, the upper end of the reset spring is propped against the upper part of the T-shaped head structure, the bottom of the side through hole at the lower end of the reset spring is propped against, and the reset spring has precompression quantity so that the sliding block always has a trend of upward movement.
More specifically, the weak current signal detection probe comprises a mounting seat, wherein a mounting hole which is penetrated up and down is arranged in the mounting seat, an elastic contact piece is arranged in the mounting hole, and the head part of the elastic contact piece extends out of the mounting hole and bends towards the running direction of nailing of a gun needle; one side of the gun needle is provided with an outer bulge which is pressed above the elastic contact piece head after the nail is shot and in the energy storage process, and is separated from the elastic contact piece head when the gun needle is moved backwards and energy storage is about to be completed.
More specifically, the front side of the outer bulge is provided with a structure for reducing the impact of high-speed forward movement of the gun needle on the inclined surface of the head of the elastic contact.
More specifically, the width of the head of the elastic contact piece gradually decreases from bottom to top.
More specifically, the two sides of the opening of the mounting hole are provided with limiting grooves, and the two sides of the corresponding elastic contact piece are provided with corresponding limiting protrusions at positions corresponding to the limiting grooves.
More specifically, a fixing part is arranged on one side of the mounting seat, a connecting hole is arranged on the fixing part, and the connecting hole is used for fixing the whole mounting seat on the electric nailing gun body through a bolt.
The contact type weak current signal control switch structure designed by the utility model directly utilizes the working position of the gun needle to perform signal triggering, is a direct contact type control switch, has high detection precision, is not influenced by factors such as light rays, temperature and the like, and has the characteristics of simple structure, low cost and convenient later maintenance.
Drawings
FIG. 1, a functional block diagram of the present utility model;
FIG. 2 is a schematic diagram of a three-dimensional structure of a weak current signal detection probe of the utility model;
FIG. 3 is an enlarged schematic view of a portion of the weak current signal detection probe of the present utility model mounted on an electric nailer;
FIG. 4 is a cross-sectional view of the weak current signal detection probe of the present utility model;
FIG. 5 is an exploded perspective view of the weak current signal detection probe of the present utility model;
FIG. 6 is a schematic diagram of a three-dimensional structure of the gun needle of the utility model when the gun needle is just contacted with a weak current signal detection probe;
FIG. 7 is a second embodiment of the weak current signal detection probe of the present utility model;
FIG. 8 is an enlarged schematic view of a portion of a second weak current signal detection probe mounted on an electric nailer;
fig. 9 is a cross-sectional view of a second weak electric signal detection probe.
Detailed Description
As shown in fig. 1, a contact control switch structure of an electric nailing gun comprises a gun needle 1, a weak current signal detection probe 3 arranged at the top of a gun body 2 and positioned on a gun needle movement path, a controller 4 and a weak power supply 5.
The gun needle 1 always keeps contact with the weak current signal detection probe 3 in the backward energy storage process after the nails are shot, so that a closed loop is formed by the gun body 2, the gun needle 1, the weak current signal detection probe 3, the controller 4 and the weak power supply 5, and the controller 4 drives the driving motor 6 to work according to weak current closed loop signals; when the backward movement energy storage of the gun needle 1 is about to be completed, the weak current signal detection probe 3 is separated from the gun needle 1 to disconnect a loop, so that the controller 4 sends out a delay stop signal of the driving motor 6.
The weak power source 5 is a battery or a power source directly taken from an electric nailing gun, and a corresponding structure is selected according to the actual requirement.
As shown in fig. 2-6, the weak current signal detection probe 3 comprises a mounting seat 31, a fixing portion 311 is provided on one side of the mounting seat 31, a connecting hole 312 is provided on the fixing portion 311, and the connecting hole 312 fixes the entire mounting seat 31 on the electric nailing gun body 2 through a bolt.
The mounting seat 31 is provided with a mounting hole 313 which is vertically penetrated, a guide sleeve 33 is arranged in the upper part of the mounting hole 313, a sliding block 34 which can vertically slide relative to the guide sleeve 33 is arranged in the guide sleeve 33, a mounting groove 341 with a notch at the top is arranged in the middle of the top of the sliding block 34, a roller 35 with the top protruding from the mounting groove is arranged in the mounting groove 341, and the rolling direction of the roller 35 is consistent with the moving direction of the gun needle 1, so that the roller 35 and the gun needle 1 are contacted to form a rolling contact mode, the abrasion during contact of the roller 35 and the gun needle 1 can be effectively reduced, and the service lives of the detection probe and the gun needle 1 are prolonged.
The sliding block 34 is provided with a vertically arranged guide rail 342 below the mounting groove 341, a transverse guide post 36 is arranged in the guide rail 342, and the transverse guide post 36 passes through the connecting hole 331 of the guide sleeve 33 and is positioned on two side walls of the mounting seat 31. In use, the entire slide 34 can only be lifted up and down along the range of the vertically arranged guide rails due to the restriction of the transverse guide posts 36.
The lower end of the sliding block 34 passes through the guide sleeve 33 and extends into the lower part of the mounting hole 313, and an elastic reset structure which enables the sliding block to always have an upward moving trend is arranged between the lower end of the sliding block 34 and the mounting seat 31. The trailing end of the slider 34 is provided with a wire connection hole 344 for the wire.
The roller 35 on the top of the slider 34 protrudes from the top surface of the mount 31 when the slider is moved up to the highest position. An outer protrusion 11 is arranged on one side of the gun needle 1, and the outer protrusion 11 is pressed above the roller 35 after the completion of nail shooting and in the energy storage process, and is separated from the roller 35 when the backward movement energy storage of the gun needle 1 is about to be completed. Here, in order to reduce the impact of the high-speed forward movement of the gun needle 1 on the roller 35, the front side of the outer protrusion 11 is provided with a slope structure 111.
The lower part of the mounting seat 31 is provided with a side through hole 314 communicated with the mounting hole 313, the elastic reset structure comprises a T-shaped head structure 343 below the sliding block and a reset spring 37 sleeved on the T-shaped head, the upper end of the reset spring 37 is propped against the upper part of the T-shaped head structure 343, the bottom of the side through hole 314 at the lower end of the reset spring 37 is propped against, and the reset spring 37 has precompression quantity so that the sliding block 34 always has an upward moving trend.
In use, when the gun needle 1 finishes nailing and moves backwards and resets, the outer bulge 11 on the gun needle always presses above the roller 35, on one hand, the outer bulge keeps contact with the roller 35 and drives the roller 35 to roll, meanwhile, the whole sliding block 34 is pressed downwards to further compress the reset spring 37, the process is that the outer bulge 11 is separated from the roller 35 until the rear movement energy storage of the gun needle 1 is about to be finished, at the moment, a weak current loop is disconnected, the controller 4 sends out a signal to enable the driving motor 6 to stop in a delay way, thus accurately realizing the operation that the gun needle 1 stops rotating at the maximum energy storage position, and simultaneously, the whole sliding block 34 rises again with the roller 35 under the action of the reset force of the reset spring 37, so as to be ready for the next signal triggering. When the next working cycle of the nail shooting is required to be restarted, the trigger is pressed down, at the moment of starting the driving motor 6, the eccentric driving wheel 7 is quickly separated from the needle teeth at the forefront end of the needle 1, the needle 1 is punched forward at a high speed under the action of compressed air pressure in the energy storage mechanism 8, nails sent to a nail outlet by the nail box mechanism 9 are shot and ejected, at the moment, the outer protrusion 11 of the needle 1 and the roller 35 are in contact again, so that the needle 1 is started to move backwards for energy storage operation, and the cycle operation of the electric nail gun can be realized.
As shown in fig. 7-9, a second embodiment of the weak current signal detection probe 3 includes a mounting seat 31, a fixing portion 311 is disposed on one side of the mounting seat 31, a connection hole 312 is disposed on the fixing portion 311, and the connection hole 312 fixes the entire mounting seat 31 on the electric nailing gun body 2 through a bolt.
The mounting seat 31 is provided with a mounting hole 313 penetrating up and down, the mounting hole 313 is provided with an elastic contact piece 32, and the head 321 of the elastic contact piece 32 extends out of the mounting hole 313 and bends towards the nailing running direction of the gun needle 1. An outer protrusion 11 is arranged on one side of the gun needle 1, and the outer protrusion 11 is pressed and held above the elastic contact piece head 321 after the completion of the nail shooting and in the energy storage process, and is separated from the elastic contact piece head 321 when the backward movement energy storage of the gun needle 1 is about to be completed.
The tail portions of the elastic contact pieces 32 are provided with wire connection holes 323 for connecting wires.
In use, when the gun needle 1 finishes nailing and moves backwards to store energy, the outer bulge 11 is always pressed on the head 321 of the elastic contact piece, the weak current loop is kept on, the driving motor 6 keeps working, the outer bulge 11 is separated from the head 321 of the elastic contact piece until the gun needle 1 moves backwards and stores energy to be finished, at the moment, the weak current loop is disconnected, the controller 4 sends a signal to enable the driving motor 6 to stop in a delayed manner, so that the operation of rotating the gun needle 1 to stop at the maximum energy storage position is accurately realized, and meanwhile, the head 321 of the whole elastic contact piece rebounds under the action of self deformation restoring force to be ready for the next signal trigger. When the next working cycle of the nail is required to be restarted, the trigger is pressed down, at the moment of starting the driving motor 6, the eccentric driving wheel 7 is quickly separated from the needle teeth at the forefront end of the needle 1, the needle 1 is punched forward at a high speed under the action of compressed air pressure in the energy storage mechanism 8, nails sent to a nail outlet by the nail box mechanism 9 are shot and ejected, at the moment, the outer protrusion 11 of the needle 1 and the head 321 of the elastic contact piece are in contact again, so that the back-moving energy storage operation of the needle 1 is started, and the cycle operation of the electric nail gun can be realized.
Here, in order to reduce the impact force when the gun needle 1 moves forward rapidly, the front side of the outer protrusion 11 is provided with a slant structure 111 for reducing the impact of the gun needle 1 moving forward at a high speed on the elastic contact head 321.
Furthermore, to further improve the elastic recovery performance of the head 321 of the elastic contact 32, the width of the head 321 of the elastic contact gradually decreases from bottom to top.
Considering the effective positioning of the whole elastic contact 32 in the mounting hole 313, the two sides of the opening of the mounting hole 313 are provided with limiting grooves 3131, and the two sides of the corresponding elastic contact 32 are provided with corresponding limiting protrusions 322 at positions corresponding to the limiting grooves 3131.
In summary, the contact type weak current signal control switch structure designed by the utility model directly uses the working position of the gun needle 1 to perform signal triggering, is a direct contact type control switch, has high detection precision, is not influenced by factors such as light rays, temperature and the like, and has the characteristics of simple structure, low cost and convenient later maintenance.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, but any simple modification, equivalent variation or modification made to the above embodiments according to the technical principles of the present utility model still falls within the scope of the technical solutions of the present utility model.
Claims (9)
1. A contact weak current signal control switch structure of an electric nail gun is characterized in that: the gun mainly comprises a gun needle (1), a weak current signal detection probe (3) arranged at the top of a gun body (2) and positioned on a moving route of the gun needle (1), a controller (4) and a weak current source (5); the weak power supply (5) is taken from an electric nailing gun power supply; the gun needle (1) always keeps contact with the weak current signal detection probe (3) in the backward energy storage process after the nails are shot, so that a closed loop is formed by the gun body (2), the gun needle (1), the weak current signal detection probe (3), the controller (4) and the weak current source (5), and the controller (4) drives the driving motor (6) to work according to weak current closed loop signals; when the backward movement energy storage of the gun needle (1) is about to be completed, the weak current signal detection probe (3) is separated from the gun needle (1) to disconnect a loop, so that the controller (4) sends out a delay stop signal of the driving motor (6).
2. The touch weak current signal control switch structure of an electric nailer of claim 1, wherein: the weak current signal detection probe (3) comprises a mounting seat (31), wherein a mounting hole (313) which is vertically penetrated is formed in the mounting seat (31), a guide sleeve (33) is arranged in the upper part of the mounting hole (313), a sliding block (34) which can vertically slide relative to the guide sleeve is arranged in the guide sleeve (33), a mounting groove (341) with a notch at the top is formed in the middle of the top of the sliding block (34), a roller (35) with a convex mounting groove at the top is arranged in the mounting groove (341), and the rolling direction of the roller (35) is consistent with the moving direction of the gun needle (1); the sliding block (34) is provided with a guide rail (342) which is vertically distributed below the mounting groove (341), a transverse guide column (36) is arranged in the guide rail (342), and the transverse guide column (36) passes through the guide sleeve (33) and is positioned on two side walls of the mounting seat (31); the lower end of the sliding block (34) penetrates through the guide sleeve (33) and stretches into the lower part of the mounting hole (313), an elastic reset structure which enables the sliding block to always have an upward moving trend is arranged between the lower end of the sliding block (34) and the mounting seat (31), and a roller (35) at the top of the sliding block (34) protrudes out of the top end surface of the mounting seat (31) when the sliding block (34) moves to the highest position; one side of the gun needle (1) is provided with an outer bulge (11), and the outer bulge (11) is pressed above the roller (35) after the completion of nail shooting and in the energy storage process and is separated from the roller (35) when the backward movement energy storage of the gun needle (1) is about to be completed.
3. The touch weak current signal control switch structure of an electric nail gun of claim 2, wherein: the front side of the outer bulge (11) is provided with an inclined surface structure (111) for reducing high-speed forward movement of the gun needle (1) to impact the roller (35).
4. The touch weak current signal control switch structure of an electric nail gun of claim 2, wherein: the lower part of the mounting seat (31) is provided with a side through hole (314) communicated with the mounting hole (313), the elastic reset structure comprises a T-shaped head structure (343) below the sliding block and a reset spring (37) sleeved on the T-shaped head, the upper end of the reset spring (37) is propped against the upper part of the T-shaped head structure (343), the bottom of the side through hole (314) at the lower end of the reset spring (37) is propped against, and the reset spring (37) has precompression quantity so that the sliding block (34) always has a trend of upward movement.
5. The touch weak current signal control switch structure of an electric nailer of claim 1, wherein: the weak current signal detection probe (3) comprises a mounting seat (31), wherein a mounting hole (313) penetrating up and down is formed in the mounting seat (31), an elastic contact piece (32) is arranged in the mounting hole (313), and the head (321) of the elastic contact piece (32) extends out of the mounting hole (313) and bends towards the nailing running direction of the gun needle (1); one side of the gun needle (1) is provided with an outer bulge (11), and the outer bulge (11) is pressed above the elastic contact piece head (321) after the completion of nail shooting and in the energy storage process and is separated from the elastic contact piece head (321) when the backward movement energy storage of the gun needle (1) is about to be completed.
6. The touch weak current signal control switch structure of an electric nail gun of claim 5, wherein: the front side of the outer bulge (11) is provided with an inclined surface structure (111) for reducing the impact of high-speed forward movement of the gun needle (1) on the elastic contact head (321).
7. The touch weak current signal control switch structure of an electric nail gun of claim 5, wherein: the width of the head (321) of the elastic contact piece (32) gradually decreases from bottom to top.
8. The touch weak current signal control switch structure of an electric nail gun of claim 5, wherein: limiting grooves (3131) are formed in two sides of the opening of the mounting hole (313), and corresponding limiting protrusions (322) are formed in two sides of the corresponding elastic contact piece (32) at positions corresponding to the limiting grooves (3131).
9. A contact weak current signal control switch structure for an electric nail gun as defined in any one of claims 2-8, wherein: one side of the mounting seat (31) is provided with a fixing part (311), the fixing part (311) is provided with a connecting hole (312), and the connecting hole (312) is used for fixing the whole mounting seat (31) on the electric nailing gun body (2) through a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321606038.4U CN219854403U (en) | 2023-06-24 | 2023-06-24 | Contact type weak current signal control switch structure of electric nailing gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321606038.4U CN219854403U (en) | 2023-06-24 | 2023-06-24 | Contact type weak current signal control switch structure of electric nailing gun |
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| Publication Number | Publication Date |
|---|---|
| CN219854403U true CN219854403U (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321606038.4U Active CN219854403U (en) | 2023-06-24 | 2023-06-24 | Contact type weak current signal control switch structure of electric nailing gun |
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| Country | Link |
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| CN (1) | CN219854403U (en) |
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2023
- 2023-06-24 CN CN202321606038.4U patent/CN219854403U/en active Active
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