CN219576346U - Impact-resistant protection device of direct current screen - Google Patents
Impact-resistant protection device of direct current screen Download PDFInfo
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- CN219576346U CN219576346U CN202320496168.0U CN202320496168U CN219576346U CN 219576346 U CN219576346 U CN 219576346U CN 202320496168 U CN202320496168 U CN 202320496168U CN 219576346 U CN219576346 U CN 219576346U
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- sliding door
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model discloses an impact-resistant protection device of a direct current screen, which comprises: the box, internally mounted has the direct current screen. The sliding door is connected with the box body in a sliding way, is arranged at the opening of the box body and is used for opening or closing the box body. And the elastic piece is arranged on the sliding door, is in butt fit with the box body and is used for buffering the box body and the sliding door. And the speed reducing device is arranged on the box body, connected with the sliding door and used for reducing the sliding speed of the sliding door. When the anti-impact protection device of the direct current screen is used, the sliding door can be opened or closed, the elastic piece can provide buffering for the closing moment of the sliding door, when the speed of the sliding door is too high, the speed reducing device reduces the sliding speed of the sliding door, the sliding door is prevented from being too high, and therefore collision between the sliding door and the box is weakened, and rebound of the elastic piece to the sliding door is weakened.
Description
Technical Field
The utility model relates to the technical field of direct current screens, in particular to an impact-resistant protection device of a direct current screen.
Background
The DC screen is a novel DC system for digital control, protection, management and measurement. And (3) debugging a direct current screen, and switching on an alternating current power supply to test whether the alternating current dual-power supply switching device works normally or not, and whether the voltage of the lower port of the dual-power supply switching device is normal or not. After the alternating current part is tested to be normal, the alternating current switch of the charging module is sequentially closed, whether the module is started normally or not is observed, and the output voltage and polarity of the module are measured. After the charging module is started normally and the output voltage and polarity are correct, the battery pack switch and each bus switch are turned on, whether the lower opening of the battery pack switch, the combined bus voltage and the polarity are correct or not is measured, and whether the direction of the voltmeter is reversed or not is observed.
Chinese patent application No.: 202123118850.6A direct current screen's protection device shocks resistance, which comprises a box body, be provided with the slide rail on upper cover and the bottom plate of box, the stopper is installed to the slide rail midpoint, the stopper both sides are provided with the fixing base, the slide rail both sides are provided with the stop piece, install left door and right door between the slide rail, install the handle on left door and the right door, box, left door and the right door internally mounted have insulating rubber, the insulating rubber side is provided with first steel sheet, first steel sheet side installs the spring base, the spring base side is connected with the spring, the spring opposite side is connected with the spring footstock, the second steel sheet is installed to spring footstock side, the sponge layer is installed to the second steel sheet side, the sponge layer side is connected with elastic steel sheet, and this direct current screen's protection device shocks resistance, shock resistance is strong, can operate and maintain the direct current screen at any time simultaneously, and inside is provided with insulating rubber, prevents that the direct current screen from causing the incident.
For the related art, when the impact protection device of the direct current screen is used, the buffer is provided between the door and the box body through the spring, but when the door is closed at too high speed, the door is bounced by the spring, so that a gap exists between the door and the box body, the door needs to be slowly closed again, and the box body is easily sealed.
Disclosure of Invention
In view of the above technical problems, the present utility model provides an impact protection device for a dc screen, including:
the box, internally mounted has the direct current screen.
The sliding door is connected with the box body in a sliding way, is arranged at the opening of the box body and is used for opening or closing the box body.
And the elastic piece is arranged on the sliding door, is in butt fit with the box body and is used for buffering the box body and the sliding door.
And the speed reducing device is arranged on the box body, connected with the sliding door and used for reducing the sliding speed of the sliding door.
In order to achieve the above purpose, the utility model is realized by the following technical scheme: when the anti-impact protection device of the direct current screen is used, the sliding door can be opened or closed, the elastic piece can provide buffering for the closing moment of the sliding door, when the speed of the sliding door is too high, the speed reducing device reduces the sliding speed of the sliding door, the sliding door is prevented from being too high, and therefore collision between the sliding door and the box is weakened, and rebound of the elastic piece to the sliding door is weakened.
Compared with the prior art, the utility model has the following advantages: when the speed of closing the sliding door is too high, the speed reducing device reduces the speed of the sliding door, reduces the rebound of elasticity on the sliding door, reduces the gap between the sliding door and the box body, does not need to slowly close the sliding door again, and ensures that the box body is tightly sealed.
Further preferably, the speed reducing device includes:
and the rotating wheel is rotationally connected with the box body.
The circular ring is fixedly connected with the box body, and the axis of the circular ring is coincident with the rotating shaft of the rotating wheel.
And the friction block is connected with the rotating wheel in a sliding manner and is in butt fit with the inner wall of the circular ring.
And one side of the linkage assembly is connected with the sliding door, and the other side of the linkage assembly is connected with the rotating wheel and is used for sliding along with the sliding door to drive the rotating wheel to rotate.
By adopting the technical scheme, the sliding door slides and drives the rotating wheel to rotate through the linkage assembly, the rotating wheel drives the friction block to rotate, the friction block slides away from the rotating shaft of the rotating wheel under the action of centrifugal force, the friction block and the circular ring generate friction force, and the friction block decelerates under the action of the friction force, so that the rotating wheel is driven to decelerate, and the rotating wheel decelerates the sliding door through the linkage assembly. The larger the sliding speed of the sliding door is, the larger the centrifugal force of the friction block is, the larger the friction force between the friction block and the circular ring is, and the stronger the deceleration capacity of the sliding door is.
Further preferably, the linkage assembly includes:
the rack is connected with the sliding door in a sliding way, and the length direction of the rack is along the sliding direction of the sliding door.
The gear is rotationally connected with the box body and meshed with the rack.
One side of the connecting shaft mechanism is connected with the gear, and the other side of the connecting shaft mechanism is connected with the rotating wheel and drives the gear to rotate along with the rotation of the gear.
By adopting the technical scheme, the sliding door slides to drive the rack to slide, the rack drives the gear to rotate, and the gear drives the rotating wheel to rotate through the connecting shaft mechanism.
Further preferably, the coupling mechanism includes:
the first driving wheel is coaxially and fixedly connected with the gear.
The second driving wheel is coaxially and fixedly connected with the rotating wheel.
The transmission belt is sleeved with the first transmission wheel and the second transmission wheel.
By adopting the technical scheme, the gear rotates to drive the first driving wheel to rotate, the first driving wheel drives the driving belt to move, and the driving belt drives the second driving wheel to rotate. The second driving wheel drives the rotating wheel to rotate.
Further preferably, the first driving wheel is a synchronous wheel, the second driving wheel is a synchronous wheel, and the driving belt is a synchronous belt.
By adopting the technical scheme, the synchronous belt and the synchronous wheel can reduce the slip between the first driving wheel and the driving belt and the slip between the second driving wheel and the driving belt.
Further preferably, the speed reducing device further includes:
and one end of the spring is connected with the friction block, and the other end of the spring is connected with the rotating wheel and is used for applying force to the friction block so that the friction block moves away from the circular ring.
By adopting the technical scheme, when the sliding door slides slowly, the centrifugal force provided by the sliding door for the friction block is smaller than the elastic force of the spring, and the spring applies force to the friction block, so that the friction block is separated from the inner wall of the circular ring, and the sliding door slides slowly more.
Further preferably, the speed reducing device further includes:
the cone block is in sliding connection with the rotating wheel, the rotating shaft of the cone block is coincident with the rotating shaft of the rotating wheel, and the sliding direction is along the axis direction of the rotating wheel.
The expansion sleeve is annular, is provided with a notch, the inner wall is a conical surface, the inner wall is in butt fit with the conical block, and the outer wall is connected with one end of the spring, which is far away from the friction block.
And the driving piece is in driving connection with the cone block and is used for driving the cone block to slide.
By adopting the technical scheme, the driving piece drives the cone block to slide, the expansion sleeve is driven by the cone block to push and the expansion sleeve is elastic, the outer diameter of the expansion sleeve is changed, the spring is driven to move, the spring drives the friction block to move, and therefore the distance between the friction block and the circular ring is adjusted.
Further preferably, the driving member is a bolt, and is in threaded connection with the rotating wheel, and the bolt head of the driving member abuts against the conical block.
By adopting the technical scheme, the bolt is rotated, and the conical block is pushed to move by the bolt.
It is further preferred that the friction blocks are provided in plurality and distributed around the rotating shaft array of the rotating wheel.
It is further preferred that the friction block and the wheel contact surface are coated with a wear resistant coating.
In summary, compared with the prior art, the utility model has the following beneficial effects: when the anti-impact protection device of the direct current screen is used, the sliding door can be opened or closed, the elastic piece can provide buffering for the closing moment of the sliding door, when the speed of the sliding door is too high, the speed reducing device reduces the sliding speed of the sliding door, the sliding door is prevented from being too high, and therefore collision between the sliding door and the box is weakened, and rebound of the elastic piece to the sliding door is weakened. When the speed of closing the sliding door is too high, the speed reducing device reduces the speed of the sliding door, reduces the rebound of elasticity on the sliding door, reduces the gap between the sliding door and the box body, does not need to slowly close the sliding door again, and ensures that the box body is tightly sealed.
Drawings
Fig. 1 is a schematic structural view of the present embodiment;
fig. 2 is an internal structure view of the present embodiment;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
reference numerals: 1-a box body; 2-sliding door; 3-an elastic member; 4-rotating wheels; 5-a circular ring; 6, a friction block; 7-a rack; 8-gear; 9-a first driving wheel; 10-a second driving wheel; 11-a transmission belt; 12-a spring; 13-cone blocks; 14-expanding sleeve; 15-a driving member; 16-dc screen.
Detailed Description
The present utility model is described in further detail below with reference to fig. 1, 2 and 3.
The DC screen is a novel DC system for digital control, protection, management and measurement. And (3) debugging a direct current screen, and switching on an alternating current power supply to test whether the alternating current dual-power supply switching device works normally or not, and whether the voltage of the lower port of the dual-power supply switching device is normal or not. After the alternating current part is tested to be normal, the alternating current switch of the charging module is sequentially closed, whether the module is started normally or not is observed, and the output voltage and polarity of the module are measured. After the charging module is started normally and the output voltage and polarity are correct, the battery pack switch and each bus switch are turned on, whether the lower opening of the battery pack switch, the combined bus voltage and the polarity are correct or not is measured, and whether the direction of the voltmeter is reversed or not is observed.
Chinese patent application No.: 202123118850.6A direct current screen's protection device shocks resistance, which comprises a box body, be provided with the slide rail on upper cover and the bottom plate of box, the stopper is installed to the slide rail midpoint, the stopper both sides are provided with the fixing base, the slide rail both sides are provided with the stop piece, install left door and right door between the slide rail, install the handle on left door and the right door, box, left door and the right door internally mounted have insulating rubber, the insulating rubber side is provided with first steel sheet, first steel sheet side installs the spring base, the spring base side is connected with the spring, the spring opposite side is connected with the spring footstock, the second steel sheet is installed to spring footstock side, the sponge layer is installed to the second steel sheet side, the sponge layer side is connected with elastic steel sheet, and this direct current screen's protection device shocks resistance, shock resistance is strong, can operate and maintain the direct current screen at any time simultaneously, and inside is provided with insulating rubber, prevents that the direct current screen from causing the incident.
For the related art, when the impact protection device of the direct current screen is used, the buffer is provided between the door and the box body through the spring, but when the door is closed at too high speed, the door is bounced by the spring, so that a gap exists between the door and the box body, the door needs to be slowly closed again, and the box body is easily sealed.
Based on the technical problems, the applicant carries out the following technical scheme conception:
when the speed of the sliding door is high, the sliding door is decelerated, and the impact of the sliding door on the box body is reduced.
Based on the above conception, the applicant proposes a technical scheme of the utility model, which is specifically as follows:
an impact-resistant protection device for a dc screen, as shown in fig. 1, 2 and 3, comprises: the box 1 is internally provided with a direct current screen 16. The sliding door 2 is in sliding connection with the box body 1, is arranged at the opening of the box body 1 and is used for opening or closing the box body 1. And an elastic member 3 mounted on the sliding door 2 and in abutting engagement with the case 1 for providing a buffer between the case 1 and the sliding door 2. And the speed reducing device is arranged on the box body 1, is connected with the sliding door 2 and is used for reducing the sliding speed of the sliding door 2.
When the anti-impact protection device of the direct current screen is used, the sliding door 2 can be used for opening or closing the box body 1, the elastic piece 3 can be used for providing buffering for the closing moment of the sliding door 2, when the speed of the sliding door 2 is too high, the speed reducing device is used for reducing the sliding speed of the sliding door 2, the speed of the sliding door 2 is prevented from being too high, so that the collision between the sliding door 2 and the box body 1 is reduced, and the rebound of the elastic piece 3 to the sliding door 2 is weakened. When the speed of closing the door is too high, the speed reducer reduces the speed of the sliding door 2, reduces the rebound of elasticity on the sliding door 2, reduces the gap between the sliding door 2 and the box body 1, and does not need to slowly close the sliding door 2 again, so that the box body 1 is tightly sealed.
Specifically, the speed reduction device includes: and the rotating wheel 4 is rotationally connected with the box body 1. The circular ring 5 is fixedly connected with the box body 1, and the axis of the circular ring is coincident with the rotating shaft of the rotating wheel 4. And the friction block 6 is in sliding connection with the rotating wheel 4 and is in abutting fit with the inner wall of the circular ring 5. And one side of the linkage assembly is connected with the sliding door 2, and the other side of the linkage assembly is connected with the rotating wheel 4 and is used for sliding along with the sliding door 2 to drive the rotating wheel 4 to rotate. Sliding door 2 slides and drives runner 4 rotation through the linkage subassembly, and runner 4 drives friction block 6 rotation, and under the effect of centrifugal force, friction block 6 keeps away from the pivot slip of runner 4, and friction block 6 and ring 5 produce frictional force, and friction block 6 slows down under the effect of friction to drive runner 4 and slow down, runner 4 slows down runner 2 through the linkage subassembly. The greater the sliding speed of the sliding door 2, the greater the centrifugal force of the friction block 6, the greater the friction force between the friction block 6 and the ring 5, and the greater the deceleration capability of the sliding door 2.
Specifically, the linkage assembly includes: and the rack 7 is in sliding connection with the sliding door 2, and the length direction of the rack is along the sliding direction of the sliding door 2. And the gear 8 is rotatably connected with the box body 1 and meshed with the rack 7. And one side of the connecting shaft mechanism is connected with the gear 8, and the other side of the connecting shaft mechanism is connected with the rotating wheel 4, and the connecting shaft mechanism rotates along with the gear 8 to drive the gear 8 to rotate. The sliding door 2 slides to drive the rack 7 to slide, the rack 7 drives the gear 8 to rotate, and the gear 8 drives the rotating wheel 4 to rotate through the connecting shaft mechanism.
Specifically, the connecting shaft mechanism comprises: the first driving wheel 9 is coaxially and fixedly connected with the gear 8. The second driving wheel 10 is coaxially and fixedly connected with the rotating wheel 4. The transmission belt 11 is sleeved with the first transmission wheel 9 and the second transmission wheel 10. The gear 8 rotates to drive the first driving wheel 9 to rotate, the first driving wheel 9 drives the driving belt 11 to move, and the driving belt 11 drives the second driving wheel 10 to rotate. The second driving wheel 10 drives the rotating wheel 4 to rotate.
Specifically, the first driving wheel 9 is a synchronous wheel, the second driving wheel 10 is a synchronous wheel, and the driving belt 11 is a synchronous belt. The synchronous belt and the synchronous wheel can reduce the slip between the first driving wheel 9 and the driving belt 11 and reduce the slip between the second driving wheel 10 and the driving belt 11.
Specifically, the speed reduction device further includes: and one end of the spring 12 is connected with the friction block 6, and the other end of the spring is connected with the rotating wheel 4 and is used for applying force to the friction block 6 so as to enable the friction block 6 to move away from the circular ring 5. When the sliding door 2 slides slowly, the centrifugal force provided by the sliding door 2 for the friction block 6 is smaller than the elastic force of the spring 12, and the spring 12 applies force to the friction block 6 to separate the friction block 6 from the inner wall of the circular ring 5, so that the sliding door 2 slides slowly more.
Specifically, the speed reduction device further includes: the cone block 13 is in sliding connection with the rotating wheel 4, the rotating shaft of the cone block is coincident with the rotating shaft of the rotating wheel 4, and the sliding direction is along the axial direction of the rotating wheel 4. The expansion sleeve 14 is annular, is provided with a notch, has a conical inner wall, is in butt fit with the conical block 13, and has an outer wall connected with one end of the spring 12, which is far away from the friction block 6. And the driving piece 15 is in driving connection with the cone block 13 and is used for driving the cone block 13 to slide. The driving piece 15 drives the cone block 13 to slide, the expansion sleeve 14 changes the outer diameter of the expansion sleeve 14 under the action of the pushing of the cone block 13 and the elasticity of the expansion sleeve, so that the spring 12 is driven to move, the spring 12 drives the friction block 6 to move, and the distance between the friction block 6 and the circular ring 5 is adjusted.
Specifically, the driving member 15 is a bolt, and is in threaded connection with the rotating wheel 4, and the bolt head of the driving member abuts against the conical block 13. The bolt is rotated, and the conical block 13 is pushed to move by the bolt.
Specifically, the friction blocks 6 are provided in plurality and distributed around the rotation axis array of the rotating wheel 4.
Specifically, the contact surface of the friction block 6 and the rotating wheel 4 is coated with a wear-resistant coating.
Principle and process of operation
Please refer to fig. 1-3, which illustrate the principles of the present utility model in more detail: when the anti-impact protection device of the direct current screen is used, the sliding door 2 is slid, the box body 1 can be opened or closed by the sliding door 2, buffering can be provided for the closing moment of the sliding door 2 by the elastic piece 3, when the speed of the sliding door 2 is too high, the sliding door 2 slides to drive the rack 7 to slide, the rack 7 drives the gear 8 to rotate, the gear 8 rotates to drive the first driving wheel 9 to rotate, the first driving wheel 9 drives the driving belt 11 to move, and the driving belt 11 drives the second driving wheel 10 to rotate. The second driving wheel 10 drives the rotating wheel 4 to rotate, the rotating wheel 4 drives the friction block 6 to rotate, the friction block 6 slides away from the rotating shaft of the rotating wheel 4 under the action of centrifugal force, friction force is generated between the friction block 6 and the circular ring 5, the friction block 6 decelerates under the action of the friction force, and accordingly the rotating wheel 4 is driven to decelerate, and the rotating wheel 4 decelerates the sliding door 2 through the linkage assembly. The larger the sliding speed of the sliding door 2 is, the larger the centrifugal force of the friction block 6 is, the larger the friction force between the friction block 6 and the circular ring 5 is, the stronger the speed reducing capability of the sliding door 2 is, the too high speed of the sliding door 2 is avoided, the collision between the sliding door 2 and the box body 1 is reduced, and the rebound of the elastic piece 3 to the sliding door 2 is reduced. When the speed of closing the door is too high, the speed reducer reduces the speed of the sliding door 2, reduces the rebound of elasticity on the sliding door 2, reduces the gap between the sliding door 2 and the box body 1, and does not need to slowly close the sliding door 2 again, so that the box body 1 is tightly sealed.
The present embodiment is merely illustrative of the utility model and is not intended to limit the utility model, and those skilled in the art, after having read the present specification, may make modifications to the embodiment without creative contribution as required, but are protected by patent laws within the protection scope of the present utility model.
Claims (10)
1. An impact protection device for a dc screen, comprising:
the box body (1) is internally provided with a direct current screen (16);
the sliding door (2) is connected with the box body (1) in a sliding way, is arranged at the opening of the box body (1) and is used for opening or closing the box body (1);
the elastic piece (3) is arranged on the sliding door (2) and is in abutting fit with the box body (1) and is used for buffering between the box body (1) and the sliding door (2);
and the speed reducing device is arranged on the box body (1), connected with the sliding door (2) and used for reducing the sliding speed of the sliding door (2).
2. The apparatus according to claim 1, wherein the speed reducing means comprises:
the rotating wheel (4) is rotationally connected with the box body (1);
the circular ring (5) is fixedly connected with the box body (1), and the axis of the circular ring is coincident with the rotating shaft of the rotating wheel (4);
the friction block (6) is connected with the rotating wheel (4) in a sliding manner and is in abutting fit with the inner wall of the circular ring (5);
and one side of the linkage assembly is connected with the sliding door (2), and the other side of the linkage assembly is connected with the rotating wheel (4) and is used for sliding along with the sliding door (2) to drive the rotating wheel (4) to rotate.
3. The direct current screen impact protection device according to claim 2, wherein the linkage assembly comprises:
the rack (7) is in sliding connection with the sliding door (2), and the length direction of the rack is along the sliding direction of the sliding door (2);
the gear (8) is rotationally connected with the box body (1) and meshed with the rack (7);
one side of the connecting shaft mechanism is connected with the gear (8), and the other side of the connecting shaft mechanism is connected with the rotating wheel (4) and drives the gear (8) to rotate along with the rotation of the gear (8).
4. A direct current screen impact protection device according to claim 3, wherein the coupling mechanism comprises:
the first driving wheel (9) is coaxially and fixedly connected with the gear (8);
the second driving wheel (10) is coaxially and fixedly connected with the rotating wheel (4);
the transmission belt (11) is sleeved with the first transmission wheel (9) and the second transmission wheel (10).
5. The shock protection device for a direct current screen according to claim 4, wherein the first driving wheel (9) is a synchronizing wheel, the second driving wheel (10) is a synchronizing wheel, and the driving belt (11) is a synchronous belt.
6. The direct current screen impact protection device according to claim 2, wherein the speed reduction device further comprises:
and one end of the spring (12) is connected with the friction block (6), and the other end of the spring is connected with the rotating wheel (4) and is used for applying force to the friction block (6) so as to enable the friction block (6) to move away from the circular ring (5).
7. The apparatus according to claim 6, wherein the speed reducing apparatus further comprises:
the cone block (13) is in sliding connection with the rotating wheel (4), the rotating shaft of the cone block is superposed with the rotating shaft of the rotating wheel (4), and the sliding direction is along the axial direction of the rotating wheel (4);
the expansion sleeve (14) is annular and provided with a notch, the inner wall is a conical surface, the inner wall is in abutting fit with the conical block (13), and the outer wall is connected with one end, far away from the friction block (6), of the spring (12);
and the driving piece (15) is in driving connection with the cone block (13) and is used for driving the cone block (13) to slide.
8. The device according to claim 7, wherein the driving element (15) is a bolt, screwed to the runner (4), the head of which abuts the cone (13).
9. The device according to claim 2, characterized in that the friction blocks (6) are provided in plurality and distributed around the array of rotation axes of the rotor (4).
10. The impact protection device for a direct current screen according to claim 2, characterized in that the contact surface of the friction block (6) with the runner (4) is coated with a wear-resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320496168.0U CN219576346U (en) | 2023-03-15 | 2023-03-15 | Impact-resistant protection device of direct current screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320496168.0U CN219576346U (en) | 2023-03-15 | 2023-03-15 | Impact-resistant protection device of direct current screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219576346U true CN219576346U (en) | 2023-08-22 |
Family
ID=87665295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320496168.0U Active CN219576346U (en) | 2023-03-15 | 2023-03-15 | Impact-resistant protection device of direct current screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219576346U (en) |
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2023
- 2023-03-15 CN CN202320496168.0U patent/CN219576346U/en active Active
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