CN219809314U - Latch locking structure - Google Patents
Latch locking structure Download PDFInfo
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- CN219809314U CN219809314U CN202321368832.XU CN202321368832U CN219809314U CN 219809314 U CN219809314 U CN 219809314U CN 202321368832 U CN202321368832 U CN 202321368832U CN 219809314 U CN219809314 U CN 219809314U
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- bolt
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- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of braking devices, and particularly relates to a latch locking structure, which comprises a limiting mechanism, a sliding block, a latch, a power assisting element and a driving mechanism, wherein the sliding block is in sliding connection with the limiting mechanism; one end of the bolt, which is opposite to the driving mechanism, extends out of the sliding block; the power assisting element is used for providing power to enable the bolt to move along the axial direction of the bolt. When the bolt is locked, when the bolt is misplaced with the slot position of the corresponding element to be braked, the power assisting element generates a force for pushing the bolt to move towards the direction close to the slot position until the bolt corresponds to the slot position of the corresponding element to be braked, and the power assisting element pushes the bolt to move towards the slot position and insert into the slot position to realize stopping; when unlocking, under the action of the power assisting element, the bolt is stressed to extend out of the groove position, so that unlocking is realized.
Description
Technical Field
The utility model belongs to the technical field of braking devices, and particularly relates to a latch locking structure.
Background
When the existing driving mechanism needs to stop moving in the driving process, the related structure needs to stop moving, so that the driving source stops moving, for example, a direct-drive motor is a very common driving source. The direct-drive motor is widely applied, can be used as a driving wheel of a robot and an electric vehicle, can also be used as a joint driving machine of the robot, and is stopped by braking at present, however, the direct-drive motor is only suitable for the driving wheel of the electric vehicle and needs a complex manual braking system, so that the application is not wide, the stopping mode is difficult to apply in the field of robots, the application of the direct-drive motor is wide, the stopping scenes are more, the stopping is needed when the robot goes up and down, the stopping is needed when the robot stops moving and the like.
In the prior art, the stop is mostly realized by adopting the reverse current braking of the motor, and the current control consumption is larger in the mode, the stability is insufficient, and the braking stop of the robot is easy to influence. The stopper of still some adopts the braking structure to stop by force, if adopts the bolt mode to stop, but adopts this kind of structure to be easy when locking, and the bolt is difficult to align with corresponding trench, and when unblanking, because the torsion of motor is big, and unblanking actuating mechanism (actuating mechanism)'s strength is very little, is easy to hold the bolt out, leads to the bolt unable to take out, influences the use.
Disclosure of Invention
The utility model aims to provide a bolt locking structure, and aims to solve the technical problem that a normal use is affected due to the fact that a bolt is inaccurate in alignment and easy to be blocked when an unlocking is carried out in a braking structure adopted by stopping in the prior art.
In order to achieve the above purpose, the latch locking structure provided by the embodiment of the utility model comprises a limiting mechanism, a sliding block in sliding connection with the limiting mechanism, a latch in sliding connection with the sliding block, a power assisting element for providing power for the sliding of the latch on the sliding block, and a driving mechanism for driving the sliding block to move relatively along the axial direction of the latch; one end of the bolt, which is opposite to the driving mechanism, extends out of the sliding block; the power assisting element is used for providing power to enable the bolt to move along the axial direction of the bolt.
Optionally, the assistance element comprises a first elastic assistance member and a second elastic assistance member; the latch has a first end and a second end; one end of the first elastic power assisting piece is connected with the first end, and the other end of the first elastic power assisting piece is connected with the sliding block; one end of the second elastic power assisting piece is connected with the second end, and the other end of the second elastic power assisting piece is connected with the sliding block.
Optionally, the power assisting element comprises a third elastic power assisting piece, and two ends of the third elastic power assisting piece are respectively connected with two ends of the bolt; the sliding block is provided with a plurality of spiral protruding blocks extending into the third elastic assisting piece, and each protruding block is used for forming an assisting point to enable the bolt to move along the axial direction of the bolt.
Optionally, the bump is located at an end of the third elastic assisting member away from the driving mechanism.
Optionally, a first clamping point and a second clamping point for limiting the power assisting element are formed at two ends of the bolt respectively.
Optionally, the first clamping point is a clamping ring arranged at one end of the bolt, which is close to the driving mechanism, the clamping ring is arranged in a clamping groove formed by inwards sinking the bolt, and one end of the power assisting element is connected with the clamping ring.
Optionally, the second clamping point is that a step is formed by protruding the end of the bolt away from the driving mechanism inwards and outwards along the radial direction, and one end of the power assisting element is connected with the step.
Optionally, the driving mechanism comprises a driving element and a transmission element in transmission connection with the driving element, and the transmission element is connected with the sliding block.
Optionally, the transmission element comprises a fixed block, a moving block arranged opposite to the fixed block, a screw rod in transmission connection with the driving element, a first transmission arm with two ends respectively in rotation connection with the fixed block and the sliding block, and a second transmission arm with two ends respectively in rotation connection with the moving block and the sliding block; the screw rod is rotatable in the fixed block, and the screw rod is in threaded connection with the movable block.
Optionally, the driving element is a driving motor.
The above technical solutions in the latch locking structure provided by the embodiments of the present utility model have at least one of the following technical effects: when the lock is locked, the driving mechanism drives the sliding block to drive the bolt to move in the direction away from the driving mechanism on the limiting mechanism, when the bolt is misplaced with the slot position of the corresponding element to be braked, the bolt is contacted with the element to prevent the bolt from advancing, due to the arrangement of the power assisting element, when the bolt corresponds to the slot position of the corresponding element to be braked, the power assisting element is contacted with the sliding block to generate a force for pushing the bolt to move in the direction close to the slot position, and under the action of the power assisting element, the bolt moves towards the slot position and is inserted into the slot position to realize stopping. When unlocking, the driving mechanism drives the sliding block to drive the bolt to move in the direction close to the driving mechanism on the limiting mechanism, in the moving process, the power assisting element is contacted with the sliding block to generate a force for pushing the bolt to move in the direction away from the slot position, and under the action of the power assisting element, the bolt is stressed to extend out of the slot position, so that unlocking is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a latch locking structure according to an embodiment of the present utility model.
Fig. 2 is a schematic view of the latch lock structure of fig. 1 from another perspective.
Fig. 3 is an exploded view of the latch locking structure of fig. 1.
Fig. 4 is a cross-sectional view of a first configuration of the assist member of the latch locking structure of fig. 1.
Fig. 5 is a cross-sectional view of a second configuration of the assist member of the latch locking structure of fig. 1.
Wherein, each reference sign in the figure:
10-limit mechanism 11-upper top plate 12-lower bottom plate
20-slide block 21-guide portion 22 a-boss
22 b-bump 30-plug 31-first end
32-second end 33-snap ring 34-clamping groove
35-step 36-plug-in part 40-booster element
41 a-first elastic assistance member 41 b-third elastic assistance member 42 a-second elastic assistance member
50-drive mechanism 51-drive element 52-transmission element
111-guide groove 521-fixed block 522-moving block
523-screw 524-first actuator arm 525-second actuator arm.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to fig. 1 to 5 are exemplary and intended to illustrate embodiments of the present utility model and should not be construed as limiting the utility model.
In the description of the embodiments of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the embodiments of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.
In one embodiment of the present utility model, as shown in fig. 1 to 5, there is provided a latch locking structure comprising a limit mechanism 10, a slider 20 slidably connected to the limit mechanism 10, a latch 30 slidably connected to the slider 20, a booster element 40 for providing booster for sliding the latch 30 on the slider 20, and a driving mechanism 50 for driving the slider to move relatively in an axial direction of the latch; the slider 20 can slide back and forth in the limiting mechanism 10 under the driving of the driving mechanism 50, and the slider 20 is limited by the limiting mechanism 10, so that the slider 20 is prevented from sliding out of the limiting mechanism 10. The end of the latch 30 facing away from the driving mechanism 50 protrudes beyond the slider 20 and is adapted to be inserted into a slot of an element to be braked to effect stopping. The sliding block 20 is internally provided with a round hole for sliding the bolt 30, and the bolt 30 can slide back and forth along the axial direction of the round hole in the round hole of the sliding block 20. The assist member 40 is for providing assist force to move the plug pin 30 in the axial direction of the plug pin.
Specifically, during locking, the driving mechanism 50 drives the sliding block 20 to drive the plug pin 30 to move in a direction away from the driving mechanism on the limiting mechanism 10, when the plug pin 30 is misplaced with a slot position of a corresponding element to be braked, the plug pin 30 is contacted with the element to prevent the plug pin 30 from advancing, due to the arrangement of the power assisting element 40, when the plug pin 30 corresponds to the slot position of the corresponding element to be braked, the power assisting element 40 is contacted with the sliding block 20 to generate a force for pushing the plug pin 30 to move in a direction close to the slot position, and under the action of the power assisting element 40, the plug pin 30 moves towards the slot position and is inserted into the slot position to realize stopping. When unlocking, the driving mechanism drives the sliding block 20 to drive the bolt 30 to move on the limiting mechanism 10 towards the direction close to the driving mechanism 50, and in the moving process, the power assisting element 40 contacts with the sliding block 20 to generate a force for pushing the bolt 30 to move towards the direction far away from the slot, and under the action of the power assisting element 40, the bolt 30 is stressed to extend out of the slot to realize unlocking.
Further, the stopper mechanism 10 includes an upper top plate 11 and a lower bottom plate 12 disposed opposite to each other up and down and connected by bolts, and a slider 20 is provided between the upper top plate 11 and the lower bottom plate 12 and is slidable between the upper top plate 11 and the lower bottom plate 12. The upper top plate 11 and/or the lower bottom plate 12 are/is provided with a guide groove 111 in a bar shape, the top and/or the bottom of the slide block 20 are/is provided with a guide part 21 arranged in the guide groove 111, and the guide part 21 can horizontally move along the length direction of the guide groove 111 under the driving of the driving mechanism 50, so that the moving stability of the slide block 20 is improved.
In the present embodiment, as shown in fig. 4 to 5, both ends of the plug pin 30 form a first snap point and a second snap point for the limit assist member 40, respectively. Specifically, the first and second snap points are located at both ends of the latch 30, respectively. One end of the assist member 40 is connected to the first snap-in point, and the other end is connected to the second snap-in point, thus fixing the assist member 40. Wherein the plug 30 has a first end 31 and a second end 32.
In this embodiment, as shown in fig. 3 to 5, the first clamping point is a clamping ring 33 disposed at one end of the latch 30 near the driving mechanism 50, the clamping ring 33 is disposed in a clamping groove 34 formed by inward recessing of the latch 30, and one end of the power assisting element 40 is connected to the clamping ring 33. Specifically, the latch 30 is provided with a clamping groove 34, the clamping groove 34 is located at one end of the latch 30 away from the groove, the clamping ring 33 is fixed in the clamping groove 34, and one end of the power assisting element 40 is connected with the clamping ring 33 to achieve fixation.
In the present embodiment, as shown in fig. 4 to 5, the second locking point is that a step 35 is formed by protruding an end of the latch 30 away from the driving mechanism 50 radially inward and outward, and an end of the assist member 40 is connected to the step 35. Specifically, the second clamping point is a step 35 annularly arranged on the bolt 30, the step 35 can slide in the round hole, and one end of the power assisting element 40 is connected with the step 35 so as to realize fixation. One end of the bolt 30 forms a plug-in part 36, and the plug-in part 36 is positioned on the side of the step 35 facing away from the power assisting element 40 and is used for being inserted into a groove position which is arranged with a stopping element to realize stopping.
In the first structural embodiment of the assist member, as shown in fig. 1 to 4, the assist member 40 includes a first elastic assist member 41a and a second elastic assist member 42a; one end of the first elastic force assisting member 41a is connected to the first end 31, and the other end is connected to the slider 20; the second elastic force-assisting member 42a has one end connected to the second end 32 and the other end connected to the slider 20. Specifically, the first elastic assistance member 41a and the second elastic assistance member 42a are respectively located at two ends of the latch 30, and are both sleeved outside the latch 30. A boss 22a is arranged in a circular hole of the slider 20 in an annular shape, and the boss 22a is positioned between the first end 31 and the second end 32. One end of the first elastic assistance member 41a is connected to the boss 22a, the other end is connected to the first end 31 of the plug 30, and likewise, one end of the second elastic assistance member 42a is connected to the boss 22a, the other end is connected to the second end 32 of the plug 30, and the boss 22a separates the first elastic assistance member 41a from the second elastic assistance member 42a and forms a point where the acting force can be provided.
When the lock is locked, the driving mechanism 50 drives the sliding block 20 to drive the bolt 30 to move in the direction away from the driving mechanism 50 on the limiting mechanism 10, when the bolt 30 is misplaced with the slot position of the corresponding element to be braked, the bolt 30 is stressed and provides a reverse force to act on the second elastic assisting piece 42a, and the sliding block 20 is acted by the driving mechanism 50, so that the second elastic assisting piece 42a is compressed to generate elastic force, and when the bolt 30 corresponds to the slot position of the corresponding element to be braked, the elastic force generated by the second elastic assisting piece 42a pushes the bolt 30 to be inserted into the slot position, so that stopping is realized. When unlocking, the driving mechanism 50 drives the sliding block 20 to drive the latch 30 to move on the limiting mechanism 10 in the direction approaching to the driving mechanism 50, in the moving process, the element to be braked may be larger due to the generated torsion, the latch 30 is inserted into the slot and is not separated, at this time, the boss 22a moves along with the sliding block 20 and compresses the first elastic assisting piece 41a, and the first elastic assisting piece 41a generates elastic force to assist the latch 30 to recover, so that the latch 30 is separated from the slot, and unlocking is realized. Wherein the boss 22a is integrally formed with the slider 20. When the booster element 40 is two springs, one end of the first elastic booster 41a is connected to the first clamping point, so as to fix one end of the first elastic booster 41a, and one end of the second elastic booster 42a is connected to the second clamping point, so as to fix the second elastic booster 42a.
In the second structural embodiment of the assistance member, as shown in fig. 5, the assistance member 40 includes a third elastic assistance member 41b, and both ends of the third elastic assistance member 41b are connected to both ends of the plug pin 30, respectively; the sliding block 20 is provided with a plurality of helically arranged protruding blocks 22b extending into the third elastic assisting member 41b, and each protruding block 22b is used for forming an assisting point to enable the bolt 30 to move along the axial direction of the bolt 30. Specifically, the first elastic force-assisting member 41a, the second elastic force-assisting member 42a and the third elastic force-assisting member 41b all adopt spring structures, and as the spring structures are spiral, each bump 22b is spirally arranged so as to extend between coils of the third elastic force-assisting member 41b, and the third elastic force-assisting member 41b is separated to form two sections with opposite acting forces after being stressed.
In the present embodiment, based on the principle of simplification of the production process, the first elastic assistance member 41a and the second elastic assistance member 42a are generally set to elastic members having only different lengths, and the third elastic assistance member is generally set to elastic members having uniform elastic parameters.
When the lock is locked, the driving mechanism 50 drives the sliding block 20 to drive the bolt 30 to move in the direction away from the driving mechanism 50 on the limiting mechanism 10, when the bolt 30 is dislocated from the slot position of the corresponding element to be braked, the bolt 30 is stressed and provides a reverse force to act on the third elastic assisting piece 41b, and the sliding block 20 is acted by the driving mechanism 50, the acting force of the protruding block 22b compresses the third elastic assisting piece 41b to generate elastic force, and when the bolt 30 corresponds to the slot position of the corresponding element to be braked, the elastic force generated by the third elastic assisting piece 41b pushes the bolt 30 to be inserted into the slot position, so that stopping is realized. When unlocking, the driving mechanism 50 drives the sliding block 20 to drive the latch 30 to move on the limiting mechanism 10 in the direction approaching to the driving mechanism 50, in the moving process, the element to be braked may be larger due to the generated torsion, the latch 30 is inserted into the slot and is not separated, at this time, the bump 22b moves along with the sliding block 20 and compresses the third elastic assisting piece 41b, and the third elastic assisting piece 41b generates elastic force to assist the latch 30 to recover, so that the latch 30 is separated from the slot, and unlocking is realized. Wherein the bump 22b and the slider 20 are integrally formed. When the assisting element 40 is a spring, one end of the third elastic assisting member 41b is connected to the first clamping point, and the other end is connected to the second clamping point, so that the third elastic assisting member 41b is fixed.
In the present embodiment, as shown in fig. 5, the bump 22b is located at one end of the third elastic assistance member 41b away from the driving mechanism 50. Specifically, the protrusion 22b is located at a position of the third elastic force-assisted member 41b, where the middle of the third elastic force-assisted member 41b is close to the plugging portion 36, so that the two sections of the third elastic force-assisted member 41b separated by the protrusion 22b generate substantially different acting forces after being stressed, that is, the stroke of the third elastic force-assisted member 41b close to one section of the driving mechanism 50 is longer than that of the third elastic force-assisted member close to one section of the plugging portion 36, the same displacement is moved, and under the condition of pushing the plug pin, the pushing force is increased, the unlocking time is ensured, and the locking is more stable.
In the present embodiment, as shown in fig. 2 to 3, the driving mechanism 50 includes a driving element 51 and a transmission element 52 drivingly connected to the driving element 51, the transmission element 52 being connected to the slider 20. Specifically, the driving element 51 provides power to drive the transmission element 52 to move, and the transmission element 52 drives the slider 20 to move in the limiting mechanism 10.
In the present embodiment, as shown in fig. 2 to 3, the driving element 51 is a driving motor. Specifically, the main shaft of the drive motor is connected to the transmission element 52, and power is supplied by the drive motor.
Of course, the driving mechanism 50 may be driven by a driving motor and the transmission element 52, or may directly drive the slider 20 to move by a linear module, a driving cylinder, an oil cylinder, an electric cylinder, or the like.
In the present embodiment, as shown in fig. 2 to 3, the transmission member 52 includes a fixed block 521, a moving block 522 provided opposite to the fixed block 521, a screw 523 drivingly connected to the driving member 51, a first transmission arm 524 having both ends rotatably connected to the fixed block 521 and the slider 20, respectively, and a second transmission arm 525 having both ends rotatably connected to the moving block 522 and the slider 20, respectively; screw 523 is rotatable within fixed block 521, and screw 523 is threadably coupled to movable block 522. Specifically, a main shaft of the driving motor is connected to the screw 523 to drive the screw 523 to rotate. The fixed block 521 is fixed on the limit mechanism 10, the moving block 522 is slidably connected on the limit mechanism 10, the screw 523 passes through the fixed block 521 and is in threaded connection with the moving block 522, and the driving element 51 drives the screw 523 to rotate so as to realize the movement of the moving block 522 on the screw 523, wherein the bolt 30 is perpendicular to the screw 523. Both ends of the first transmission arm 524 and both ends of the second transmission arm 525 are connected with the fixed block 521, the moving block 522 and the slider 20 through rotating shafts, and the latch 30 is located between the first transmission arm 524 and the second transmission arm 525. The driving element 51 drives the moving block 522 to move to drive the second driving arm 525 to swing, the second driving arm 525 drives the sliding block 20 to move, and the sliding block 20 drives the first driving arm 524 to swing, wherein the first driving arm 524 can improve the moving stability of the sliding block 20.
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, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. A latch locking structure, characterized in that: the device comprises a limiting mechanism, a sliding block, a bolt, a power assisting element and a driving mechanism, wherein the sliding block is in sliding connection with the limiting mechanism, the bolt is in sliding connection with the sliding block, the power assisting element is used for enabling the bolt to slide on the sliding block to provide power assistance, and the driving mechanism is used for driving the sliding block to move relatively along the axial direction of the bolt; one end of the bolt, which is opposite to the driving mechanism, extends out of the sliding block; the power assisting element is used for providing power to enable the bolt to move along the axial direction of the bolt.
2. The deadbolt locking structure of claim 1, wherein: the power assisting element comprises a first elastic power assisting piece and a second elastic power assisting piece; the latch has a first end and a second end; one end of the first elastic power assisting piece is connected with the first end, and the other end of the first elastic power assisting piece is connected with the sliding block; one end of the second elastic power assisting piece is connected with the second end, and the other end of the second elastic power assisting piece is connected with the sliding block.
3. The deadbolt locking structure of claim 1, wherein: the power assisting element comprises a third elastic power assisting piece, and two ends of the third elastic power assisting piece are respectively connected with two ends of the bolt; the sliding block is provided with a plurality of spiral protruding blocks extending into the third elastic assisting piece, and each protruding block is used for forming an assisting point to enable the bolt to move along the axial direction of the bolt.
4. A deadbolt locking structure according to claim 3, wherein: the protruding block is located at one end, far away from the driving mechanism, of the third elastic assisting piece.
5. The deadbolt locking structure according to any one of claims 1 to 4, characterized in that: and the two ends of the bolt are respectively provided with a first clamping point and a second clamping point for limiting the power assisting element.
6. The deadbolt locking mechanism of claim 5, wherein: the first clamping point is a clamping ring arranged at one end of the bolt, which is close to the driving mechanism, the clamping ring is arranged in a clamping groove formed by inwards sinking the bolt, and one end of the power assisting element is connected with the clamping ring.
7. The deadbolt locking mechanism of claim 5, wherein: the second clamping point is that a step is formed by protruding the end, away from the driving mechanism, of the bolt inwards and outwards in the radial direction, and one end of the power assisting element is connected with the step.
8. The deadbolt locking structure according to any one of claims 1 to 4, characterized in that: the driving mechanism comprises a driving element and a transmission element in transmission connection with the driving element, and the transmission element is connected with the sliding block.
9. The deadbolt locking structure of claim 8, wherein: the transmission element comprises a fixed block, a moving block which is arranged opposite to the fixed block, a screw rod which is in transmission connection with the driving element, a first transmission arm of which the two ends are respectively in rotary connection with the fixed block and the sliding block, and a second transmission arm of which the two ends are respectively in rotary connection with the moving block and the sliding block; the screw rod is rotatable in the fixed block, and the screw rod is in threaded connection with the movable block.
10. The deadbolt locking structure of claim 8, wherein: the driving element is a driving motor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202321368832.XU CN219809314U (en) | 2023-05-31 | 2023-05-31 | Latch locking structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202321368832.XU CN219809314U (en) | 2023-05-31 | 2023-05-31 | Latch locking structure |
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Publication Number | Publication Date |
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CN219809314U true CN219809314U (en) | 2023-10-10 |
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Family Applications (1)
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CN202321368832.XU Active CN219809314U (en) | 2023-05-31 | 2023-05-31 | Latch locking structure |
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CN (1) | CN219809314U (en) |
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2023
- 2023-05-31 CN CN202321368832.XU patent/CN219809314U/en active Active
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