CN219794968U - Locking mechanism and protective door thereof - Google Patents
Locking mechanism and protective door thereof Download PDFInfo
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- CN219794968U CN219794968U CN202321273224.0U CN202321273224U CN219794968U CN 219794968 U CN219794968 U CN 219794968U CN 202321273224 U CN202321273224 U CN 202321273224U CN 219794968 U CN219794968 U CN 219794968U
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- 230000007246 mechanism Effects 0.000 title claims abstract description 86
- 230000001681 protective effect Effects 0.000 title claims abstract description 25
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- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 239000003638 chemical reducing agent Substances 0.000 claims description 36
- 238000004880 explosion Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 10
- 230000006870 function Effects 0.000 description 9
- 238000010276 construction Methods 0.000 description 4
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- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
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- 230000002035 prolonged effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
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Abstract
The utility model discloses a locking mechanism and a protective door thereof, which solve the problems of poor stress and large occupied space of the locking mechanism on the protective door in the prior art. The locking mechanism comprises a driving device and a locking assembly, wherein the driving device drives the locking assembly to move through a transmission mechanism so as to realize unlocking and locking; the locking assembly comprises a locking plate in transmission fit with the transmission mechanism, a lock head is arranged on the locking side of the locking plate, and a rolling piece or a sliding piece is arranged on the locking plate. The locking mechanism can bear rebound force under the action of oversized impact load, and abnormal opening of the door leaf caused by damage of the impact load is prevented; the locking drive has two drive forms of flashlight to because door leaf locking drive arrangement and locking horizontal pole are all installed in the peripheral door frame of door body, explosion impact load is directly transmitted to the door frame by the horizontal pole, and high vibrations condition is less to its influence, has improved the reliability of operation.
Description
Technical Field
The utility model relates to the technical field of protective door locking devices, in particular to a locking mechanism and a protective door thereof.
Background
The protection door is a door capable of resisting various shock waves or heavy object collision, is generally made of steel materials or steel ladle concrete materials, can be used in the prior civil air defense construction, factory warehouse and construction site, so as to play a role in protecting important equipment and materials in the door safely, and has the most important function of carrying out controlled locking treatment on the protection door so as to ensure that a door leaf of the protection door can be stably connected with a door frame of the protection door under a closed state, thereby achieving the effect of sealing protection. With the increasing demand for resistance of the protective door, the demand for the auxiliary structure of the protective door is also increased.
The prior art people's engineering locking system adopts traditional bolt structure, and locking device sets up in door leaf and door frame laminating surface, is connected with motor and manual operation wheel through the transmission that installs on the door leaf, and this system is when suffering explosion load, and violent vibrations can make drive arrangement inefficacy to cause the guard gate unable to open, like the actuating mechanism and the control method of "a dual-purpose guard gate of hand, electricity" that the chinese patent publication No. CN109610986a disclosed, its evenly arranged locking bolt can't bear high-resistance impact load. The Chinese patent with publication number of CN217950042U discloses a locking mechanism arranged on a door frame and a protective door adopting the locking mechanism, wherein the lifting mechanism and the locking mechanism can bear larger impact load, and the moving direction of the locking mechanism is towards the center of a channel because the locking mechanism is opened, so that the space of the channel is necessarily occupied, and the volumes of a door leaf and the door frame are necessarily increased on the premise of ensuring the effective channel area, thereby causing cost waste. Therefore, a latching mechanism with simple structure, good stress and small occupied space is needed.
Disclosure of Invention
Aiming at the defects in the background technology, the utility model provides a locking mechanism and a protective door thereof, which solve the problems of poor stress and large occupied space of the locking mechanism on the protective door in the prior art.
The technical scheme of the utility model is realized as follows:
the locking mechanism comprises a driving device and a locking assembly, wherein the driving device drives the locking assembly to move through a transmission mechanism so as to realize unlocking and locking; the locking assembly comprises a locking plate in transmission fit with the transmission mechanism, a lock head is arranged on the locking side of the locking plate, and a rolling piece or a sliding piece is arranged on the locking plate.
As a preferable scheme, the driving device comprises a motor and a manual operation wheel, an output shaft of the motor is connected with a speed reducer through a coupler, an axle of the manual operation wheel is connected with an output shaft of the speed reducer, the output shaft of the speed reducer is also connected with a transmission main shaft, and the transmission mechanism is in transmission connection with the transmission main shaft.
The transmission mechanism comprises at least one transmission gear arranged on the transmission main shaft, and the transmission gear is meshed with a rack arranged on the locking plate. Further preferably, the transmission main shaft is provided with two transmission gears, the two transmission gears are a transmission gear I and a transmission gear II respectively, the inner side face of the locking plate is provided with two racks correspondingly, and the transmission gear I and the transmission gear II drive the locking plate to move through the racks respectively to realize unlocking and locking.
As another preferable scheme, the driving device comprises a driving motor and a connecting rod mechanism, wherein the driving motor is connected with a speed reducer through a coupler, one end of the connecting rod mechanism is connected with an output shaft of the speed reducer, the other end of the connecting rod mechanism is connected with a locking plate, and the output end of the speed reducer is provided with a manual operation wheel.
Further, the rolling element comprises a pair of walking wheels fixed at the bottom of the locking plate, and the pair of walking wheels provides rolling support for the locking plate. The sliding piece comprises a sliding block arranged at the bottom of the locking plate, the sliding block is in sliding fit with the fixed sliding rail, and the sliding block provides sliding support for the fixed locking plate.
A protective door comprises a door leaf, a door frame and a locking mechanism; the door frame is provided with a mounting groove, and the locking mechanism is arranged in the mounting groove; the occupied space is reduced.
Further, a locking plate of the locking mechanism is supported in the mounting groove by a rolling member or a sliding member; the door leaf is provided with a buckle corresponding to the lock head. Preferably, the locking heads are distributed in a plurality along the height direction of the locking plate, the cross section of each locking head is wedge-shaped, and the locking heads are matched with the buckling wedge surfaces.
The beneficial effects of the utility model are as follows: 1. the locking mechanism can bear rebound force under the action of oversized impact load, and abnormal opening of the door leaf caused by damage of the impact load is prevented; 2. the locking drive has two drive modes of a flashlight, and as the door leaf locking drive device and the locking cross rod are both arranged in the door frame at the periphery of the door body, the explosion impact load is directly transmitted to the door frame by the cross rod, the influence of high vibration conditions on the door frame is small, and the operation reliability is improved; the wedge lock head also prevents the condition that the door body can not be opened due to high-strength vibration. 3. The driving device adopts a gear rack or connecting rod structure, ensures the reliability and stability of the movement of the locking assembly, and further improves the reliability of the locking mechanism. 4. The protective door with the locking mechanism can realize reliable opening and closing and locking functions under the conditions of small space and high vibration, has compact structure, small space occupation, is convenient to install and maintain, and is very suitable for the characteristic of narrow space of protective engineering.
Drawings
In order to more clearly illustrate the embodiments of the present utility model, the drawings that are required for the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic side view of a latching mechanism of the present utility model.
Fig. 2 is a schematic front view of the locking mechanism applied to the protective door.
Fig. 3 is a schematic top view of the protective door in a locked state.
Fig. 4 is a partial enlarged view of the cooperation structure of the transmission mechanism and the locking assembly in embodiment 1.
Fig. 5 is a schematic view of the protective door in a fully opened state.
Fig. 6 is a partial enlarged view of the engagement structure of the transmission mechanism and the locking assembly in embodiment 2.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, in embodiment 1, a locking mechanism comprises a driving device 1 and a locking assembly 3, wherein the driving device 1 drives the locking assembly 3 to move through a transmission mechanism 2 to realize unlocking and locking. When it is applied to a protective door, the door leaf is locked and unlocked by the movement of the locking assembly 3. The locking assembly 3 comprises a locking plate 3-1 in transmission fit with the transmission mechanism 2, locking heads 3-4 are arranged on the locking side of the locking plate 3-1, a plurality of locking heads can be arranged according to the requirement, and locking stability is improved. The locking plate 3-1 is provided with a rolling piece or a sliding piece; the rolling members provide rolling support for the latch plate 3-1 and the sliding members provide sliding support for the latch plate 3-1, ensuring stability of the latch assembly 3 during movement. In practical application, all the mechanisms can be embedded in a door frame or a wall body, when the door body is opened, the locking plate 3-1 is hidden in the side door frame, and when the door body is closed, the locking plate 3-1 horizontally moves transversely, and the door body is locked in the door frame through the lock head.
As shown in fig. 4, the driving device 1 in this embodiment includes a motor 1-1 and a manually operated wheel 1-3, and an output shaft of the motor 1-1 is connected with a speed reducer 1-4 through a coupling 1-2. The speed reducer 1-4 is provided with a plurality of output shafts for respectively connecting the transmission device 2 and the manual operation wheel 1-3, namely, the wheel shaft of the manual operation wheel 1-3 is connected with the output shaft of the speed reducer 1-4, the output shaft of the speed reducer 1-4 is also connected with the transmission main shaft 1-5, and the transmission mechanism 2 is in transmission connection with the transmission main shaft 1-5. In a normal working state, the motor drives the transmission main shaft 1-5 to rotate through the speed reducer 1-4, and drives the locking plate to move through the main transmission shaft and the transmission mechanism. When emergency power failure occurs, the locking plate can be driven to move through the manual operation wheel 1-3, locking and unlocking of the door leaf are achieved, the transmission process of the locking plate is similar to the driving process of the speed reducer 1-4, the speed reducer 1-4 is provided with emergency transmission shafts on two side faces of a door frame, the door frame is in a blocking state at ordinary times, and the manual operation wheel 1-3 is temporarily installed in the emergency state for opening and closing the door leaf.
Preferably, the transmission mechanism 2 comprises at least one transmission gear arranged on the transmission main shaft 1-5, and the transmission gear is meshed with a rack 3-3 arranged on the locking plate 3-1. In this embodiment, two transmission gears are taken as an example, that is, two transmission gears are arranged on the transmission main shaft 1-5, the two transmission gears are respectively a transmission gear i 2-1 and a transmission gear ii 2-2, two racks 3-3 are correspondingly arranged on the inner side of the locking plate 3-1, and the transmission gears i 2-1 and the transmission gears ii 2-2 respectively drive the locking plate 3-1 to move through the racks 3-3 to realize unlocking and locking. In the embodiment, the driving motor is connected with the speed reducer through the coupler, the output shaft of the speed reducer drives the gear to rotate, and then drives the rack to horizontally move, the rack is arranged on the locking plate, the locking plate is driven to move in the door frame, the door frame is moved to unlock, and the door frame is moved to reset to lock.
In order to reduce the resistance of the horizontal movement of the locking plate and prevent the movement jamming caused by uneven load caused by driving bias, the driving gears can be arranged in a plurality of groups in the vertical direction, so that the driving force provided to the locking plate is ensured to be uniform. In addition, the rolling element in the embodiment comprises a pair of walking wheels 3-2 fixed at the bottom of the locking plate 3-1, and the pair of walking wheels 3-2 provides rolling support for the locking plate 3-1, so that sliding friction force is reduced, and reliability of the mechanism is improved.
The locking mechanism is in a flat design, enough space is provided in the height direction and the thickness direction of the door leaf to increase the size of the locking plate, when the door leaf is subjected to explosion impact, rebound load is directly transmitted to a door frame and a wall body through the locking plate lock head, and the motor and the speed reducer do not bear the rebound load, so that the reliability of the impact load resistance of the locking mechanism is ensured.
Example 2: as shown in fig. 6, in this embodiment, as another implementation manner, the driving device 1 includes a driving motor 1-1a and a link mechanism 1-2a, where the link mechanism may adopt a parallelogram link mechanism or a simple single link structure, the driving motor 1-1a is connected with a speed reducer 1-4 through a coupling, one end of the link mechanism 1-2a is connected with an output shaft of the speed reducer 1-4, and the other end is connected with a locking plate 3-1; under the action of the driving motor, the output shaft of the speed reducer drives the link mechanism 1-2a to swing, and then drives the locking plate 3-1 to perform translational movement or rotation, so that the door leaf is opened and locked. The same output end of the speed reducer 1-4 is provided with a manual operation wheel 1-3, and two driving modes of a flashlight are realized for locking driving. The locking drive reserves a plurality of emergent output shafts, can realize the manual function of opening under the inside and outside emergency of guard gate, and the shutoff of door frame both sides output shaft hole at ordinary times can open the shutoff mouth under the emergency to use manual operation wheel drive gear to rotate, thereby drive the horizontal migration of locking horizontal pole, realize the manual opening and the closure of guard gate.
The sliding piece in the embodiment comprises a sliding block 3-5 arranged at the bottom of the locking plate 3-1, the sliding block 3-5 is in sliding fit with the fixed sliding rail 3-6, and the sliding block 3-5 provides sliding support for the fixed locking plate 3-1. In the implementation, the fixed slide rail can be fixed in the mounting groove of the door frame, so that the locking plate can be ensured to directionally and stably slide, and the reliability of a locking state is ensured.
Other structures are the same as in embodiment 1.
Example 3: as shown in fig. 3 and 5, a protective door comprising a door leaf 4, a door frame 5 and the locking mechanism of embodiment 1 forms a novel protective door with a locking mechanism. The door frame 5 is provided with a mounting groove 51, and the locking mechanism is arranged in the mounting groove 51. In addition, the installation groove 51 may be formed in a corresponding wall according to the construction conditions. When the door leaf 4 is in the open state, the locking plate is hidden in the mounting groove 51 of the door frame 5. The racks 3-3 are respectively meshed with the transmission gear I and the transmission gear II in two groups, and the circular motion of the transmission gear is converted into linear motion, so that the locking plate 3 is driven to horizontally move, and the door leaf 4 is opened and closed. The mounting groove 51 is formed in the side face of the door frame 5, the transmission device 2 and the locking plate 3 are arranged in the groove in the side face of the door frame 5, the locking mechanism is guaranteed not to occupy space in a channel, impact load and external vibration can be avoided, and the service life of the locking mechanism is effectively prolonged.
Wherein the locking plate 3-1 of the locking mechanism is supported in the mounting groove 51 by rolling members, ensuring a smooth movement of the locking plate 3-1 in the mounting groove 51. The door leaf 4 is provided with a buckle 41 corresponding to the lock head 3-4. As a preferable scheme, a plurality of lock heads 3-4 are distributed along the height direction of the locking plate 3-1, the cross section of each lock head 3-4 is wedge-shaped, and the lock heads 3-4 are matched with the wedge surface of the corresponding buckle 41. Under the loading of the driving motor, the wedge-shaped lock head provides continuous tension, so that the door leaf is tightly attached to the door frame, and a sealing effect is achieved.
Working principle: the protection door locking mechanism mainly utilizes a driving motor to realize the opening and closing functions of a door leaf, when the door leaf needs to be closed, the motor drives a speed reducer to rotate through a coupler, then drives a transmission gear fixed on the speed reducer to rotate, a rack meshed with the transmission gear drives a locking plate to horizontally move, and force acts on a lock head at the front end of the locking plate, so that the door leaf is pushed to be close to a door frame to realize locking. Similarly, when the door leaf is closed, the motor is controlled to rotate reversely, the rack drives the locking plate to retract into the door frame, and the lock head is separated from the door leaf lock catch, so that the door leaf opening function is realized.
When emergency power failure occurs, locking and unlocking of the door leaf can be achieved through the manual operation wheel, the transmission process of the manual operation wheel is similar to the driving process of the speed reducer, the speed reducer is provided with emergency transmission shafts on two side faces of the door frame, the speed reducer is in a blocking state at ordinary times, and the manual operation wheel is temporarily installed in the emergency state for opening and closing the door leaf.
Example 4: as shown in fig. 2 and 6, a protective door comprising a door leaf 4, a door frame 5 and the locking mechanism of embodiment 2 forms a novel protective door with a locking mechanism. The door frame 5 is provided with a mounting groove 51, and the locking mechanism is arranged in the mounting groove 51. In addition, the installation groove 51 may be formed in a corresponding wall according to the construction conditions. When the door leaf 4 is in the open state, the locking plate is hidden in the mounting groove 51 of the door frame 5. The driving motor drives the locking plate to move through the gear motor and the connecting rod mechanism, so that the door leaf 4 is opened and closed. The mounting groove 51 is formed in the side face of the door frame 5, the transmission device 2 and the locking plate 3 are arranged in the groove in the side face of the door frame 5, the locking mechanism is guaranteed not to occupy space in a channel, impact load and external vibration can be avoided, and the service life of the locking mechanism is effectively prolonged.
Wherein the locking plate 3-1 of the locking mechanism is supported in the mounting groove 51 by a slider, ensuring a smooth movement of the locking plate 3-1 in the mounting groove 51. The door leaf 4 is provided with a buckle 41 corresponding to the lock head 3-4. As a preferable scheme, a plurality of lock heads 3-4 are distributed along the height direction of the locking plate 3-1, the cross section of each lock head 3-4 is wedge-shaped, and the lock heads 3-4 are matched with the wedge surface of the corresponding buckle 41. Under the loading of the driving motor, the wedge-shaped lock head provides continuous tension, so that the door leaf is tightly attached to the door frame, and a sealing effect is achieved.
Working principle: the protective door locking mechanism mainly utilizes the driving motor to realize the opening and closing and locking functions of the door leaf, when the door leaf needs to be closed, the driving motor drives the speed reducer to rotate through the coupler, then drives the connecting rod mechanism fixed on the output shaft of the speed reducer to rotate, and then drives the locking plate to horizontally move or rotate, and force acts on the locking head at the front end of the locking plate, so that the door leaf is pushed to be close to the door frame to realize locking. Similarly, when the door leaf is closed, the motor is controlled to rotate reversely, the connecting rod drives the locking plate to retract into the door frame, and the lock head is separated from the door leaf lock catch, so that the door leaf opening function is realized.
When emergency power failure occurs, locking and unlocking of the door leaf can be achieved through the manual operation wheel, the transmission process of the manual operation wheel is similar to the driving process of the speed reducer, the speed reducer is provided with emergency transmission shafts on two side faces of the door frame, the speed reducer is in a blocking state at ordinary times, and the manual operation wheel is temporarily installed in the emergency state for opening and closing the door leaf.
The locking drive can reserve a plurality of emergent output shafts, can realize the manual function of opening under the inside and outside emergency of guard gate, and the shutoff of door frame both sides output shaft hole at ordinary times can open the shutoff mouth under the emergency to use manual operation wheel drive gear to rotate, thereby drive the horizontal migration of locking horizontal pole, realize the manual opening and the closure of guard gate. The protective door locking mechanism can realize reliable opening and closing and locking functions under the conditions of small space and high vibration, and has the advantages of simple integral structure, high reliability and convenient maintenance.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A latching mechanism, characterized by: comprises a driving device (1) and a locking component (3), wherein the driving device (1) drives the locking component (3) to move through a transmission mechanism (2) so as to realize unlocking and locking; the locking assembly (3) comprises a locking plate (3-1) in transmission fit with the transmission mechanism (2), a lock head (3-4) is arranged on the locking side of the locking plate (3-1), and a rolling piece or a sliding piece is arranged on the locking plate (3-1).
2. The latching mechanism of claim 1, wherein: the driving device (1) comprises a motor (1-1) and a manual operation wheel (1-3), an output shaft of the motor (1-1) is connected with a speed reducer (1-4) through a coupler (1-2), a wheel shaft of the manual operation wheel (1-3) is connected with an output shaft of the speed reducer (1-4), an output shaft of the speed reducer (1-4) is further connected with a transmission main shaft (1-5), and the transmission mechanism (2) is in transmission connection with the transmission main shaft (1-5).
3. The latching mechanism of claim 2, wherein: the transmission mechanism (2) comprises at least one transmission gear arranged on the transmission main shaft (1-5), and the transmission gear is meshed with a rack (3-3) arranged on the locking plate (3-1).
4. A latching mechanism according to claim 3, wherein: the transmission main shaft (1-5) is provided with two transmission gears, the two transmission gears are a transmission gear I (2-1) and a transmission gear II (2-2) respectively, the inner side of the locking plate (3-1) is correspondingly provided with two racks (3-3), and the transmission gear I (2-1) and the transmission gear II (2-2) drive the locking plate (3-1) to move through the racks (3-3) respectively to realize unlocking and locking.
5. The latching mechanism of claim 1, wherein: the driving device (1) comprises a driving motor (1-1 a) and a connecting rod mechanism (1-2 a), the driving motor (1-1 a) is connected with a speed reducer (1-4) through a coupler, one end of the connecting rod mechanism (1-2 a) is connected with an output shaft of the speed reducer (1-4), the other end of the connecting rod mechanism is connected with a locking plate (3-1), and the output end of the speed reducer (1-4) is provided with a manual operation wheel (1-3).
6. The locking mechanism of any one of claims 1-5, wherein: the rolling element comprises a walking wheel pair (3-2) fixed at the bottom of the locking plate (3-1), and the walking wheel pair (3-2) provides rolling support for the locking plate (3-1).
7. The locking mechanism of any one of claims 1-5, wherein: the sliding piece comprises a sliding block (3-5) arranged at the bottom of the locking plate (3-1), the sliding block (3-5) is in sliding fit with the fixed sliding rail (3-6), and the sliding block (3-5) provides sliding support for the fixed locking plate (3-1).
8. A protective door, characterized in that: comprising a door leaf (4), a door frame (5) and a locking mechanism according to any one of claims 1 to 7; the door frame (5) is provided with a mounting groove (51), and the locking mechanism is arranged in the mounting groove (51).
9. The guard door of claim 8 wherein: the locking plate (3-1) of the locking mechanism is supported in the mounting groove (51) by a rolling piece or a sliding piece; the door leaf (4) is provided with a buckle (41) corresponding to the lock head (3-4).
10. The guard door of claim 9 wherein: the locking heads (3-4) are distributed in a plurality along the height direction of the locking plate (3-1), the cross section of each locking head (3-4) is wedge-shaped, and the locking heads (3-4) are matched with the wedge surfaces of the buckles (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321273224.0U CN219794968U (en) | 2023-05-24 | 2023-05-24 | Locking mechanism and protective door thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321273224.0U CN219794968U (en) | 2023-05-24 | 2023-05-24 | Locking mechanism and protective door thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219794968U true CN219794968U (en) | 2023-10-03 |
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ID=88175694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321273224.0U Active CN219794968U (en) | 2023-05-24 | 2023-05-24 | Locking mechanism and protective door thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219794968U (en) |
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2023
- 2023-05-24 CN CN202321273224.0U patent/CN219794968U/en active Active
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