CN211598133U - Lock structure, vehicle door mounting structure and vehicle body - Google Patents
Lock structure, vehicle door mounting structure and vehicle body Download PDFInfo
- Publication number
- CN211598133U CN211598133U CN201921770667.4U CN201921770667U CN211598133U CN 211598133 U CN211598133 U CN 211598133U CN 201921770667 U CN201921770667 U CN 201921770667U CN 211598133 U CN211598133 U CN 211598133U
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Abstract
The utility model discloses a lock structure, a car door mounting structure and a car body, wherein the lock structure comprises a lock rod, a lock frame and a lock core, the lock core can drive the lock rod to extend or retract when rotating, the lock frame is provided with a first through hole, and the inner wall of the first through hole is provided with a limiting part; the lock core is provided with a first arrival part and a second arrival part, and the first arrival part and the second arrival part can be in limit fit with the limiting part; the vehicle door mounting structure comprises the lock structure. The lock core can rotate in the first through hole of the lock frame, and the lock core can drive the lock rod to extend out or retract when rotating, so that door locking or door opening operation with the lock groove is realized, when the lock core is in a door locking state, the limiting part is in limiting fit with the first in-place part, and when the lock core is in a door opening state, the limiting part is in limiting fit with the second in-place part, so that the reliability of the door locking state or the door opening state is ensured, the accidental occurrence caused by that the door is not firm to lock or the door is automatically closed after the door is opened is avoided, and the safety and the reliability.
Description
Technical Field
The utility model relates to a tool to lock technical field especially relates to a tool to lock structure, door mounting structure and automobile body.
Background
The lock is an appliance with a sealing function, so as to ensure the safety of people or property. As the usage of automobiles increases year by year, there are more and more latch structures for automobiles for closing or opening doors.
However, when the door is locked by the lock, if the door is opened by accident during the running of the vehicle, the lock may cause hidden trouble and even serious traffic accident, which is a problem that consumers and manufacturers do not want to see and face.
SUMMERY OF THE UTILITY MODEL
Accordingly, there is a need for a lock structure, a door mounting structure and a vehicle body; the door locking state or the door opening state of the lockset structure is more reliable, so that accidents are avoided; the vehicle door mounting structure adopts the lock structure; the vehicle body adopts the vehicle door mounting structure.
The technical scheme is as follows:
in one aspect, a lockset arrangement is provided, including a locking bar; the lock frame is provided with a first through hole, and the inner wall of the first through hole is provided with a limiting piece; the lock core is arranged in the first through hole and is rotationally connected with the lock frame, the lock core can drive the lock rod to extend or retract when rotating, the lock core is provided with a first arrival part and a second arrival part which are spaced, and the first arrival part and the second arrival part can be in limit fit with the limiting part; when the lock cylinder rotates to enable the lock rod to extend to a first preset position, the limiting piece is in limiting fit with the first in-place part; when the lock core rotates and the lock rod retracts to the second preset position, the limiting part is in limiting fit with the second in-place part.
According to the lockset structure, the lock cylinder can rotate in the first through hole of the lock frame, the lock cylinder can drive the lock rod to extend out or retract when rotating, so that door locking or door opening operation with the lock groove is realized, when the lock cylinder is in a door locking state, the limiting part is in limiting fit with the first in-place part, when the lock cylinder is in a door opening state, the limiting part is in limiting fit with the second in-place part, so that the reliability of the door locking state or the door opening state is ensured, the accidental occurrence caused by that the door is not firm or is automatically closed after the door is opened is avoided, and the safety and the reliability of the door are.
The technical solution is further explained below:
in one embodiment, the lock frame further has a second through hole extending into the first through hole, the lock frame further has a first mounting member, the limiting member is disposed at one end of the first mounting member, and the first mounting member is disposed in the second through hole such that a portion of the limiting member is disposed in the first through hole.
In one embodiment, the first mounting member includes a mounting post, the limiting member includes an elastic block disposed at one end of the mounting post, the first positioning portion and the second positioning portion are both limiting grooves, and the limiting grooves are disposed corresponding to the elastic block.
In one embodiment, the lock structure further comprises a lock tongue and a lock sleeve, the lock tongue is arranged on the lock cylinder, one end of the lock rod is movably connected with the lock tongue, and the other end of the lock rod is in sliding fit with the lock sleeve to extend or retract the lock rod.
In one embodiment, the lockset structure further comprises a movable rod, one end of the movable rod is rotatably connected with the lock tongue, and the other end of the movable rod is rotatably connected with the lock rod;
or the lock structure also comprises a movable block, the lock tongue is provided with a sliding groove matched with the movable block in a sliding way, and one end of the lock rod is rotatably connected with the movable block.
In one of them embodiment, the spring bolt still is equipped with the fixed orifices, and the spring bolt is located the lock core through the fixed orifices cover, and the tool to lock structure still includes the retaining member that is used for being fixed in the lock core with the spring bolt.
In one embodiment, the lock structure further comprises a second mounting part, the second mounting part is used for being fixed on the door body, and the lock is erected on the second mounting part.
In one embodiment, the lockset structure further comprises a lock hole cap, the lock hole cap is arranged on the lock frame, and the lock hole cap is provided with a lock hole corresponding to the lock cylinder;
the lockset structure further comprises a sealing piece, and the sealing piece is arranged between the lockhole cap and the lock frame.
On the other hand, the vehicle door mounting structure is also provided, and comprises the lock structure in any technical scheme; the lock structure is arranged on the vehicle door; and the frame is provided with a lock groove, the lock groove is arranged corresponding to the lock cylinder, and the lock cylinder can extend into or withdraw from the lock groove to lock or open the door.
Above-mentioned door mounting structure adopts aforementioned tool to lock structure, makes the locking of door more reliable with opening the door, avoids the unexpected emergence that the unreliable state of locking the door or opening the door brought, has promoted the security.
In addition, still provide a automobile body, the automobile body includes door mounting structure as above-mentioned technical scheme.
This automobile body adopts aforementioned door mounting structure, has promoted the security of door to the fail safe nature of automobile body has been promoted.
Drawings
FIG. 1 is a front perspective view of an embodiment of a lockset arrangement;
FIG. 2 is a rear perspective view of the embodiment of the latch of FIG. 1;
FIG. 3 is an exploded view of the latch structure of the embodiment of FIG. 1;
FIG. 4 is an installation view of the first mounting member and the limiting member in the embodiment of FIG. 1;
FIG. 5 is a first perspective view structural view of a door mounting structure in the embodiment;
FIG. 6 is a first perspective assembly view of the latch mounting bracket and latch structure of the embodiment of FIG. 5;
FIG. 7 is a second perspective view structural view of the vehicle door mounting structure in the embodiment;
FIG. 8 is a second perspective assembly view of the latch mounting bracket and latch structure of the embodiment of FIG. 7.
Reference is made to the accompanying drawings in which:
100. a lock frame; 110. a limiting member; 120. a first mounting member; 130. a first through hole; 140. a second through hole; 200. a lock cylinder; 210. a first carry portion; 220. a second carry portion; 230. a latch bolt; 231. a fixing hole; 240. a locking member; 310. a lock lever; 320. a lock sleeve; 330. a movable rod; 410. a second mount; 420. a keyhole cap; 430. a seal member; 500. a vehicle door; 510. a lockset mounting bracket; 520. and (7) closing the plate.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the accompanying drawings:
it will be understood that when an element is referred to herein as being "secured" to another element, it can be directly on the other element or intervening elements may also be present. 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. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. 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 to 4, a lock structure includes a lock bar 310; the lock comprises a lock frame 100, wherein the lock frame 100 is provided with a first through hole 130, and the inner wall of the first through hole 130 is provided with a limiting piece 110; the lock core 200 is arranged in the first through hole 130 and is rotationally connected with the lock frame 100, the lock core 200 can drive the lock rod 310 to extend or retract when rotating, the lock core 200 is provided with a first arrival portion 210 and a second arrival portion 220 which are spaced, and both the first arrival portion 210 and the second arrival portion 220 can be in limit fit with the limiting part 110; when the lock cylinder 200 rotates to extend the lock rod 310 to a first preset position, the limiting member 110 is in limiting fit with the first positioning portion 210; when the lock cylinder 200 rotates to retract the lock rod 310 to the second preset position, the limiting member 110 is in limiting fit with the second positioning portion 220.
This tool to lock structure, lock core 200 can be at the rotation of the first through-hole 130 of lock frame 100, lock core 200 can drive locking lever 310 when rotating and stretch out or retract, thereby realize with the locked groove lock door or the operation of opening the door, and when being in the lock door state, locating part 110 and first spacing cooperation of portion 210 that arrives, when being in the state of opening the door, locating part 110 and the spacing cooperation of second spacing portion 220 that arrives, thereby guarantee the reliability of lock door state or the state of opening the door, avoid the insecure or the accident that the automatic door that closes after opening the door and lead to again of locking the door to take place, the security and the reliability of locking the door have been guaranteed.
The lock frame 100 provides mounting support for the lock cylinder 200, the lock frame 100 can be fixed on a door (such as a vehicle door 500), and as the lock frame 100 is provided with the first through hole 130, the lock cylinder 200 can pass through the first through hole 130, so that the lock cylinder 200 can rotate in the first through hole 130, and the action of rotating the lock cylinder 200 when locking or unlocking the door is realized; because the lock cylinder 200 can drive the lock rod 310 to move telescopically when rotating, when the lock rod 310 extends to a first preset position, it indicates that the lock rod 310 has already extended into a lock groove (for example, the lock rod can be arranged on a frame of a vehicle body), so as to realize the action of locking a door, and at this time, the limiting part 110 is in limiting fit with the first positioning part 210, so as to lock the current door locking state, and avoid the potential safety hazard caused by the insecure door locking; similarly, when the locking rod 310 retracts to the second predetermined position, at this time, the locking rod 310 has already left the lock slot, so that the door opening operation can be performed, at this time, the limiting member 110 is in limiting cooperation with the second positioning portion 220, so as to lock the current door opening state, so that the locking rod 310 does not extend again due to an accident, thereby avoiding other accidents (such as accidentally locking a child in the vehicle), and further ensuring the safety to the maximum extent.
It should be noted that, when the limiting member 110 is matched with the first positioning portion 210 or the second positioning portion 220, when the lock core 200 rotates, the first positioning portion 210 can overcome the clamping action force of the limiting member 110, so that the second positioning portion 220 and the limiting member 110 are clamped and limited after the rotation, and those skilled in the art can select various technical means capable of implementing the function according to needs, and details are omitted.
Further, the limiting members 110 may be disposed at least two and spaced apart from each other. The limiting members 110 are disposed on the inner wall of the first through hole 130 at intervals, and correspondingly, the lock cylinder 200 may also be correspondingly provided with a third positioning portion, a fourth positioning portion, and the like, so that when the lock cylinder 200 rotates, each limiting member 110 is matched with the corresponding positioning portion to realize better clamping technical effect, and at this time, the rotation of the lock cylinder 200 may require a larger external rotation force, which is not repeated.
Referring to fig. 3, the lock frame 100 further has a second through hole 140, the second through hole 140 extends into the first through hole 130, the lock frame 100 further has a first mounting member 120, the limiting member 110 is disposed at one end of the first mounting member 120, and the first mounting member 120 is disposed in the second through hole 140, so that a portion of the limiting member 110 is disposed in the first through hole 130.
The second through hole 140 is used to mount the first mounting element 120, so that the first mounting element 120 can be fixed on the lock frame 100, and after the first mounting element 120 is mounted on the lock frame 100, the limiting element 110 at one end of the first mounting element 120 can be partially (e.g. half) located in the first through hole 130, so as to be clamped and limited with the first positioning portion 210 or the second positioning portion 220, which is not described again.
In fig. 3, the hole axis of the second through hole 140 is perpendicular to the hole axis of the first through hole 130, the second through hole 140 directly extends into the hole of the first through hole 130, the second through hole 140 may be a screw hole, etc., so that the first mounting member 120 can be fixed on the lock frame 100 by screwing, and the limiting member 110 is disposed at one end of the first mounting member 120, so that the limiting member 110 can be partially disposed in the first through hole 130, which is not described again.
Referring to fig. 3 and 4, the first mounting member 120 includes a mounting post, the limiting member 110 includes an elastic block disposed at one end of the mounting post, and the first positioning portion 210 and the second positioning portion 220 are both limiting grooves disposed corresponding to the elastic block.
In fig. 4, the first mounting member 120 may be a mounting post fixed on the lock frame 100 by a screw connection, the limiting member 110 may be an elastic block fixed at one end of the mounting post close to the first through hole 130, and a part of the elastic block is located in the first through hole 130, and the elastic block has elasticity, so that the elastic block can be engaged with a limiting groove on the lock cylinder 200, and when the lock cylinder 200 rotates, the elastic block can further rotate after overcoming a clamping force of the elastic block to reach another position, which is not described again.
Further, the elastic block may be a ball plunger, and of course, those skilled in the art may select other members capable of meeting the functional requirements, which are not described in detail.
Referring to fig. 1 and 2, the lock structure further includes a locking tongue 230 and a lock sleeve 320, the locking tongue 230 is disposed on the lock cylinder 200, one end of the lock bar 310 is movably connected to the locking tongue 230, and the other end of the lock bar 310 is slidably engaged with the lock sleeve 320 to extend or retract the lock bar 310.
Referring to fig. 1 and 2, the lock structure further includes a movable rod 330, one end of the movable rod 330 is rotatably connected to the locking tongue 230, and the other end of the movable rod 330 is rotatably connected to the locking rod 310.
In this embodiment, a specific implementation manner is given, two ends of the movable rod 330 are respectively connected to the lock tongue 230 and the lock rod 310 in a rotating manner, when the lock tongue 230 rotates along with the lock cylinder 200, the movable rod 330 is driven to swing, the movable rod 330 swings, so as to drive the lock rod 310 to stretch, and further, the function of converting the rotation motion into the stretching motion of the lock rod 310 through the link transmission is realized, which is not described again.
Of course, it may also be: the lock structure further comprises a movable block, the lock tongue 230 is provided with a sliding groove matched with the movable block in a sliding manner, and one end of the lock rod 310 is rotatably connected with the movable block.
In this way, the sliding groove is arranged along the length direction of the lock tongue 230, and the movable block is equivalent to a sliding block, so that the function of converting the rotation motion of the lock tongue 230 into the telescopic motion of the lock rod 310 is realized in a manner of swinging the sliding block, and further description is omitted.
Referring to fig. 3, the locking tongue 230 further has a fixing hole 231, the locking tongue 230 is sleeved on the key cylinder 200 through the fixing hole 231, and the lock structure further includes a locking member 240 for fixing the locking tongue 230 to the key cylinder 200.
The lock core 200 is provided with a step, the bolt 230 is sleeved on the lock core 200 through the fixing hole 231, the locking member 240 is fixed with the lock core 200, so that the bolt 230 is pressed and fixed at the step position of the lock core 200, if the locking member 240 can be a locking nut, the lock core 200 is provided with a thread structure corresponding to the locking nut, and the bolt 230 is fixed on the lock core 200 through the screw joint. Of course, the latch bolt 230 may also be provided integrally with the lock cylinder 200, and will not be described herein.
Referring to fig. 1 to 3, the lock structure further includes a second mounting member 410, the second mounting member 410 is used for being fixed on the door body, and the lock frame 100 is disposed on the second mounting member 410.
The second mounting member 410 may be a mounting plate, and the second mounting member 410 may be fixed to the vehicle door 500 of the vehicle body, so as to fix the lock frame 100 and the like to the vehicle door 500, and of course, the second mounting member 410 may also be a part of the lock frame 100 or be provided integrally with the lock frame 100, which is not described herein again.
Referring to fig. 2 and 3, the lock structure further includes a lock hole cap 420, the lock hole cap 420 is disposed on the lock frame 100, and the lock hole cap 420 has a lock hole corresponding to the lock cylinder 200.
The lock core 200 needs to be leaked outside to rotate through a key and the like, and a lock hole cap 420 is arranged in order to ensure the normal leakage of the lock core 200 without influencing other structures and ensure the integrity and the attractiveness of the whole structure; the lock hole cap 420 may be screwed and fixed on the lock frame 100, and the middle portion of the lock hole cap 420 has a through hole, so that a portion of the lock cylinder 200 is located in the through hole but may not be exposed, which not only protects the lock cylinder 200 from being damaged by leakage, but also plays a role in installation and beauty as shown in fig. 5 and 6, and is not described again.
In addition, the lock structure further includes a sealing member 430, and the sealing member 430 is disposed between the keyhole cap 420 and the lock frame 100. The sealing element 430 is used for sealing, and if the sealing element 430 can be a sealing ring, the sealing performance of the interior of the lock structure is improved, external humid air, water drops, impurities and the like are prevented from entering the lock structure, the normal working performance of the lock structure is affected, and the description is omitted.
Referring to fig. 5 to 8, the present embodiment further provides a vehicle door 500 mounting structure, including the lock structure according to any of the above embodiments; the lock structure is arranged on the vehicle door 500; and the frame is provided with a lock groove, the lock groove is arranged corresponding to the lock cylinder 200, and the lock cylinder 200 can extend into or withdraw from the lock groove to lock or open the door.
This door 500 mounting structure adopts aforementioned tool to lock structure, makes the lock door of door 500 more reliable with opening the door, avoids the unexpected emergence that the unreliable state of locking the door or opening the door brought, has promoted the security.
Of course, the lock slot herein can also be understood as a stop block disposed on the frame in a springable manner, so as to realize the functions of opening and locking the door by the pressing and non-pressing of the lock rod 310 and the stop block, which will not be described in detail.
Referring to fig. 5-8, a latch mounting bracket 510 is specifically secured to the door 500 for mounting a latch structure.
If latch mounting 510 is a cross member, second mounting member 410 of the latch structure is threadably secured to latch mounting 510, thereby securing the latch structure to door 500.
Of course, it should be noted that the lock mounting frame 510 is provided with a through hole corresponding to the lock cylinder 200 of the lock structure, so that the lock cylinder 200 can be unlocked or locked through both inside and outside, and further description is omitted.
Further, as shown in fig. 5, a hole corresponding to the size of the lock hole cap 420 is further formed in the door panel of the vehicle door 500, so that the lock hole cap 420 leaks outwards, and the lock hole cap 420 can be tightly attached to the door panel of the vehicle door 500, such as tightly sealing the door panel through the sealing element 430, thereby preventing external impurities from entering, ensuring the safety and reliability of the lock structure, and avoiding repeated description.
In addition, as shown in fig. 7 and 8, the lock mounting bracket 510 is further provided with a sealing plate 520, one side of the locking mounting bracket located in the vehicle is further provided with a hole corresponding to the sealing plate 520, the locking mounting bracket is sealed and fixed on the lock mounting bracket 510 and seals the hole, and the sealing plate 520 is provided with a hole capable of exposing the lock cylinder 200, so as to perform unlocking or locking operations, which is not described again.
Referring to fig. 7 and 8, a door 500 frame is disposed at an end of the door 500, a lock sleeve 320 of a lock structure is fixed to the door 500 frame, and the door 500 frame is provided with a hole for extending or retracting the lock rod 310 to lock or unlock the door corresponding to a lock slot of a frame on a vehicle body, which will not be described again.
In addition, the present embodiment also provides a vehicle body including the vehicle door 500 mounting structure as described in the above embodiment.
This automobile body adopts aforementioned door 500 mounting structure, has promoted door 500's security to the fail safe nature of automobile body has been promoted.
The automobile body includes frame etc. is equipped with the locked groove that corresponds with locking lever 310 of tool to lock structure on the frame to the mode that stretches into the locked groove through locking lever 310 realizes the operation of locking the door, withdraws from the operation that can open the door through locking lever 310 realizes the mode of locked groove, no longer describes repeatedly.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A lock construction, comprising:
a lock lever;
the lock frame is provided with a first through hole, and the inner wall of the first through hole is provided with a limiting piece; and
the lock cylinder is arranged in the first through hole and is rotationally connected with the lock frame, the lock cylinder can drive the lock rod to extend or retract when rotating, the lock cylinder is provided with a first arrival part and a second arrival part which are spaced, and the first arrival part and the second arrival part can be in limit fit with the limiting part;
when the lock cylinder rotates to enable the lock rod to extend to a first preset position, the limiting piece is in limiting fit with the first in-place part; when the lock cylinder rotates to enable the lock rod to retract to a second preset position, the limiting part is in limiting fit with the second in-place part.
2. The lock structure according to claim 1, wherein the lock frame further has a second through hole extending into the first through hole, the lock frame further has a first mounting member, the limiting member is disposed at one end of the first mounting member, and the first mounting member is disposed in the second through hole such that a portion of the limiting member is disposed in the first through hole.
3. The lock structure according to claim 2, wherein the first mounting member includes a mounting post, the limiting member includes an elastic block disposed at one end of the mounting post, the first positioning portion and the second positioning portion are both limiting grooves, and the limiting grooves are disposed corresponding to the elastic block.
4. The lock structure according to any one of claims 1 to 3, further comprising a lock tongue and a lock sleeve, wherein the lock tongue is disposed on the lock cylinder, one end of the lock bar is movably connected to the lock tongue, and the other end of the lock bar is slidably engaged with the lock sleeve to extend or retract the lock bar.
5. The lock structure as claimed in claim 4, further comprising a movable rod, wherein one end of the movable rod is rotatably connected to the lock tongue, and the other end of the movable rod is rotatably connected to the lock rod;
or the lock structure further comprises a movable block, the lock tongue is provided with a sliding groove matched with the movable block in a sliding manner, and one end of the lock rod is rotatably connected with the movable block.
6. The lock structure of claim 4, wherein the locking tongue further comprises a fixing hole, the locking tongue is sleeved on the lock cylinder through the fixing hole, and the lock structure further comprises a locking piece for fixing the locking tongue on the lock cylinder.
7. The lock structure according to claim 4, further comprising a second mounting member for securing to a door body, wherein the lock is mounted to the second mounting member.
8. The lock structure according to claim 4, further comprising a lock hole cap provided to the lock frame, the lock hole cap having a lock hole corresponding to the lock cylinder;
the lockset structure further comprises a sealing piece, and the sealing piece is arranged between the lockhole cap and the lock frame.
9. A vehicle door mounting structure characterized by comprising:
the lock structure of any one of claims 1-8;
the lock structure is arranged on the vehicle door; and
the lock comprises a frame, wherein the frame is provided with a lock groove, the lock groove and the lock cylinder are correspondingly arranged, and the lock cylinder can extend into or withdraw from the lock groove to lock or open a door.
10. A vehicle body characterized by comprising the door mounting structure according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921770667.4U CN211598133U (en) | 2019-10-21 | 2019-10-21 | Lock structure, vehicle door mounting structure and vehicle body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921770667.4U CN211598133U (en) | 2019-10-21 | 2019-10-21 | Lock structure, vehicle door mounting structure and vehicle body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211598133U true CN211598133U (en) | 2020-09-29 |
Family
ID=72586069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921770667.4U Active CN211598133U (en) | 2019-10-21 | 2019-10-21 | Lock structure, vehicle door mounting structure and vehicle body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211598133U (en) |
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2019
- 2019-10-21 CN CN201921770667.4U patent/CN211598133U/en active Active
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