Locking mechanism and locking device

Abstract

The present invention provides a locking mechanism and a locking device, the locking mechanism being used for locking and securing a detachable optional assembly. The locking mechanism comprises: a housing detachably connected to the detachable optional assembly, a fixing frame mounted in the housing, a driving assembly slidably connected to the fixing frame, and a lock tongue movably connected to the driving assembly. The housing is provided with a locking hole. The fixing frame is provided with a first locating shaft. The lock tongue is rotatably connected to the first locating shaft, and a curved hook adapted to the locking hole is formed at the end of the lock tongue away from the first locating shaft. The driving assembly is used for driving the lock tongue to rotate about the first locating shaft from a first position to a second position, wherein when the lock tongue rotates to the first position, the hook is located inside the housing, and when the lock tongue rotates to the second position, one end of the hook extends through the locking hole to fasten and secure the detachable optional assembly outside the housing. The locking mechanism of the present application allows the locking mechanism to lock and secure a detachable optional assembly within a housing.

Description

A locking mechanism and locking device Technical Field

[0001] This invention relates to the field of lock technology, and in particular to a locking mechanism and locking device. Background Technology

[0002] With the continuous development of technology, locking mechanisms are flexibly applied in many mechanical devices, and are particularly common in applications such as automobiles, medical devices, toys, and door locks. In these locking mechanisms, a locking hole is typically provided on the housing, and a locking part is provided on the moving part to mate with the locking hole. The moving part can then be pushed to engage or disengage the locking part with the locking hole, achieving locking or unlocking. However, most locking mechanisms can only achieve locking between internal components of the product, and regardless of whether the device is locked or engaged, the entire locking mechanism and the locked object are exposed, affecting the user's aesthetic experience and limiting their applicability. Technical issues

[0003] The purpose of this invention is to provide a locking mechanism and locking device that can at least solve the problem that locking mechanisms in related technologies can only achieve locking between internal components of a product. Technical solutions

[0004] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0005] On one hand, a locking mechanism is provided for locking and fixing with a detachable optional component. The locking mechanism includes: a housing detachably connected to the detachable optional component, a fixing frame installed in the housing, a drive component slidably connected to the fixing frame, and a locking tongue movably connected to the drive component. The housing has a locking hole, the fixing frame is provided with a first positioning shaft, the locking tongue is rotatably connected to the first positioning shaft, and a hook adapted to the locking hole and curved is formed at one end of the locking tongue away from the first positioning shaft. The drive component is used to drive the locking tongue to rotate from a first position to a second position around the first positioning shaft. When the locking tongue rotates to the first position, the hook is located inside the housing. When the locking tongue rotates to the second position, one end of the hook protrudes from the locking hole and is locked and fixed with the detachable optional component outside the housing.

[0006] Furthermore, the drive assembly includes a pusher that slides with the fixed frame and a transmission assembly rotatably connected to the pusher. The transmission assembly is connected to the latch via a first transmission shaft, which is also slidably connected to the fixed frame. The latch is provided with a first guide hole through which the first transmission shaft passes. The first guide hole is also used to slide with the first transmission shaft to achieve relative rotation between the latch and the fixed frame.

[0007] Furthermore, a first torsion spring is also sleeved on the first positioning shaft, and the first torsion spring is connected between the latch and the fixing bracket; the first torsion spring is used to provide a restoring force for the rotation of the latch so that the hook can be disengaged from the locking hole.

[0008] Furthermore, the transmission assembly includes a first connecting rod rotatably connected to the first transmission shaft and a second connecting rod rotatably connected to the end of the first connecting rod away from the first transmission shaft; the end of the second connecting rod away from the first connecting rod is also rotatably connected to a pusher via the second transmission shaft, and the pusher has a second guide hole through which the second transmission shaft passes and for sliding engagement with the second transmission shaft, the guiding direction of the second guide hole being parallel to and opposite to the sliding direction of the first transmission shaft; a second positioning shaft is also rotatably connected between the first connecting rod and the fixed frame, the first connecting rod being used to rotate around the second positioning shaft under the drive of the second connecting rod and to drive the first transmission shaft to slide relative to the fixed frame.

[0009] Furthermore, the locking mechanism also includes an elastic component mounted on a fixed frame, which abuts against the bolt when the bolt is rotated to the second position.

[0010] Furthermore, the elastic component includes a third positioning shaft connected to the fixing frame, an abutment sleeved on the third positioning shaft, and a second torsion spring sleeved on the third positioning shaft. The second torsion spring is connected between the fixing frame and the abutment and is used to provide a force to the abutment in the direction of the locking tongue.

[0011] Furthermore, the elastic component also includes a first operating member connected to the abutment member, the first operating member being used to rotate the abutment member and separate it from the hook under the action of an external force.

[0012] Furthermore, a guide rod is installed on the fixed frame, the pusher is sleeved on the guide rod, and a spring is connected between the pusher and the fixed frame, with the spring sleeved on the guide rod.

[0013] Furthermore, the actuating element includes a push plate rotatably connected to the transmission assembly and a second operating element connected to the push plate.

[0014] Furthermore, the fixed frame is also equipped with a stop block adapted to the shape of the locking hole and a connecting block connected to the stop block. The connecting block is connected to the housing, the fixed frame installed in the housing, and the push plate, which are detachably connected to the detachable optional components, via a rotating shaft. The fixed frame is also provided with a third guide hole for the rotating shaft to pass through and for sliding engagement with the rotating shaft. The push plate is also provided with a fourth guide hole for the rotating shaft to pass through and for sliding engagement with the rotating shaft. The third guide hole and the fourth guide hole have different guiding directions. The connecting block is used to move the stop block with the movement of the push plate during the unlocking process, so that the stop block enters the locking hole.

[0015] On the other hand, a locking device is provided, which includes a detachable optional component and a locking mechanism as described in the first aspect above. Beneficial effects

[0016] As can be seen from the above, the beneficial effects of the locking mechanism and locking device provided in the embodiments of the present invention are as follows: the locking tongue is connected to the driving component and also rotatably connected to the fixed frame. The driving component can slide relative to the fixed frame under the action of external force and drive the locking tongue to rotate, so that the hook of the locking tongue can enter and exit the locking hole, thereby realizing locking or unlocking. The hook of this application can pass through the locking hole and be fastened to the detachable optional component outside the housing, thereby realizing multi-directional position restriction of the locking tongue. It can lock the detachable optional component from the inside of the housing to the outside without setting an additional limiting mechanism, which is convenient for users and has strong practicality. In addition, the housing is located outside the fixed frame, locking tongue and other structures, avoiding direct exposure of complex structural components, making the locking mechanism more aesthetically pleasing. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of the locking mechanism in the unlocked state in an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of the overall structure of the locking mechanism in the locked state in an embodiment of the present invention;

[0019] Figure 3 is a partial structural schematic diagram of the locking mechanism in an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of the locking mechanism after removing the housing and the pusher in an embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of the overall structure of the locking tongue in an embodiment of the present invention;

[0022] Figure 6 is a schematic diagram of the assembly between the baffle, the connecting block and the fixing frame in an embodiment of the present invention;

[0023] Figure 7 is an exploded view of the locking mechanism in an embodiment of the present invention. Embodiments of the present invention

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and "radial," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0026] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Example:

[0028] As shown in Figures 1-7, in this embodiment, the locking mechanism 100 is used to lock and fix with a detachable optional component (not shown in the figure). The locking mechanism 100 includes: a housing 4 detachably connected to the detachable optional component, a fixing frame 1 installed in the housing 4, a drive component 2 slidably connected to the fixing frame 1, and a locking tongue 3 movably connected to the drive component 2. The housing 4 has a locking hole 41, and the fixing frame 1 is provided with a first positioning shaft 31. The locking tongue 3 is rotatably connected to the first positioning shaft 31. The end of the locking tongue 3 away from the first positioning shaft 31 forms a hook 34 that is adapted to the locking hole 41 and is curved. The drive component 2 is used to drive the locking tongue 3 to rotate from a first position (the position in the unlocked state) around the first positioning shaft 31 to a second position (the position in the locked state). When the locking tongue 3 rotates to the first position, the hook 34 is located inside the housing 4. When the locking tongue 3 rotates to the second position, one end of the hook 34 passes through the locking hole 41 and is locked and fixed with the detachable optional component outside the housing 4.

[0029] Specifically, the locking tongue 3 is connected to the drive assembly 2 and rotatably connected to the fixed frame 1. The drive assembly 2 can slide relative to the fixed frame 1 under external force, driving the locking tongue 3 to rotate, causing the locking tongue 3 to rotate around the fixed frame 1 to a second position or a first position. When the locking tongue 3 rotates to the second position, the hook 34 passes through the locking hole 41 and engages with the locking groove of the detachable optional component outside the housing 4. When the locking tongue 3 rotates to the first position, the hook 34 gradually separates from the detachable optional component and the housing 4, thereby realizing the locking and unlocking of the locking mechanism 100. In this embodiment, the hook 34 can pass through the locking hole 41 and engage with the locking groove of the detachable optional component outside the housing 4, thereby achieving multi-directional position restriction of the locking tongue 3. The hook 34 can extend outward from inside the housing 4 to engage with the detachable optional component without the need for additional limiting components, which is convenient for users and has a wide range of applications.

[0030] As shown in Figures 3 and 4, in this embodiment, the drive assembly 2 includes a pusher 21 that slides with the fixed frame 1 and a transmission assembly 22 that is rotatably connected to the pusher 21. The transmission assembly 22 is connected to the latch 3 via a first transmission shaft 223, which is also slidably connected to the fixed frame 1. The latch 3 is provided with a first guide hole 33 through which the first transmission shaft 223 passes. The first guide hole 33 is also used to slide with the first transmission shaft 223 to realize relative rotation between the latch 3 and the fixed frame 1.

[0031] Specifically, the first drive shaft 223 passes through the transmission assembly 22, the fixed frame 1, and the locking tongue 3. The locking tongue 3 is provided with a first guide hole 33 for the first drive shaft 223 to pass through. The first guide hole 33 can restrict the position and direction of the locking tongue 3's movement, and thus, the relative rotation between the locking tongue 3 and the fixed frame 1 can be achieved through the sliding engagement between the first guide hole 33 and the first drive shaft 223. The fixed frame 1 is provided with a fifth guide hole 12 for the first drive shaft 223 to pass through and for sliding engagement with the first drive shaft 223. The fifth guide hole 12 can restrict the position and direction of the first drive shaft 223's movement. The guiding direction of the fifth guide hole 12 can be parallel to the pushing direction of the pusher 21. To achieve locking, the user can apply a pushing force to the pusher 21. Under the action of the pushing force, the pusher 21 slides relative to the fixed frame 1 and drives the transmission assembly 22 to move. Furthermore, the transmission assembly 22 can rotate relative to the first transmission shaft 223 and drive the first transmission shaft 223 to slide along the fifth guide hole 12. At the same time, the first transmission shaft 223 will also slide relative to the first guide hole 33 of the latch 3, so that the latch 3 rotates relative to the fixed frame 1, and the tail end of the latch 3 can pass through the locking hole 41 to achieve locking with the detachable optional component.

[0032] It is understood that in some other embodiments, the drive assembly 2 may not include the transmission assembly 22, meaning the pusher 21 can be directly connected to the first drive shaft 223. In this configuration, the first drive shaft 223 can also slide along the fifth guide hole 12 as the pusher 21 moves, thereby rotating the locking tongue 3 and ultimately locking or unlocking the locking mechanism 100. No restrictions are imposed here.

[0033] Furthermore, in this embodiment, a first positioning shaft 31 is provided between the fixing frame 1 and the locking tongue 3. The fixing frame 1 and the locking tongue 3 are rotatably connected by the first positioning shaft 31. A first torsion spring 32 is also sleeved on the first positioning shaft 31, and the first torsion spring 32 is connected between the locking tongue 3 and the fixing frame 1. The first torsion spring 32 is used to provide a restoring force for the locking tongue 3, so that the locking tongue 3 rotates from the second position around the first positioning shaft 31 to the first position. In a specific embodiment, the fixing frame 1 forms an installation space a that is open on the upper side and at both ends. In the unlocked state, the locking tongue 3 is located in the installation space a. The first positioning shaft 31 is connected to both sides of the fixing frame 1. One end of the locking tongue 3 and the first torsion spring 32 are both sleeved on the first positioning shaft 31, and the first torsion spring 32 is connected between the locking tongue 3 and the fixing frame 1. The first positioning shaft 31 can serve as a rotation center, so that the locking tongue 3 can rotate around the first positioning shaft 31 under the guidance of the first transmission shaft 223. The first torsion spring 32 always has a restoring force that causes the locking tongue 3 to rotate from the second position to the first position around the first positioning shaft 31. That is, when the user operates the elastic component 5 and removes the resisting force of the elastic component 5 on the locking tongue 3, the locking tongue 3 can automatically rotate from the second position to the first position under the action of the first torsion spring 32 (that is, the locking tongue 3 automatically changes from the locked state to the unlocked state). The structure is ingeniously designed and easy to use.

[0034] In this embodiment, the transmission assembly 22 includes a first connecting rod 221 rotatably connected to the first transmission shaft 223, and a second connecting rod 222 rotatably connected to the end of the first connecting rod 221 away from the first transmission shaft 223. The end of the second connecting rod 222 away from the first connecting rod 221 is also rotatably connected to the pusher 21 via the second transmission shaft 224. The pusher 21 has a second guide hole 2111 through which the second transmission shaft 224 passes and for sliding cooperation with the second transmission shaft 224. The guiding direction of the second guide hole 2111 is parallel to the guiding direction of the fifth guide hole 12. A second positioning shaft 225 is also rotatably connected between the first connecting rod 221 and the fixing frame 1. The first connecting rod 221 is used to rotate around the second positioning shaft 225 under the drive of the second connecting rod 222 and drive the first transmission shaft 223 to slide along the fifth guide hole 12. That is, the first transmission shaft 223 can move in the opposite direction of the pusher 21 through the transmission component 22, and the rotation of the locking tongue 3 can be achieved through the mutual cooperation between the first transmission shaft 223 and the first guide hole 33.

[0035] As shown in Figures 3-5 and 7, in this embodiment, the locking mechanism 100 further includes an elastic component 5 mounted on the fixed frame 1. The elastic component 5 is used to abut against different parts of the locking tongue 3 when the locking tongue 3 is rotated to the second position and the first position, respectively. When the locking tongue 3 is rotated to the second position, the hook 34 extends out of the housing 4 and is fastened to the detachable optional component. When the locking tongue 3 is rotated to the first position, the hook 34 separates from the housing 4.

[0036] Specifically, as shown in Figure 5, the outer periphery of the locking tongue 3 is provided with abutment portions 35, wherein the side where the abutment portions 35 are located is opposite to the fastening side of the hook 34. When the hook 34 extends through the locking hole 41 and out of the housing 4 to be fastened and fixed with the detachable optional component, the elastic component 5 can abut against the abutment portions 35, thereby improving the locking stability of the locking mechanism 100.

[0037] Further, as shown in Figures 3, 4, and 7, in this embodiment, the elastic component 5 includes a third positioning shaft 51 connected to the fixed frame 1, an abutment 52 sleeved on the third positioning shaft 51, and a second torsion spring 53 sleeved on the third positioning shaft 51. The second torsion spring 53 is connected between the fixed frame 1 and the abutment 52, and is used to provide a force to the abutment 52 in the direction of the latch 3. That is, through the use of the second torsion spring 53, the elastic component 5 always has a force in the direction of the latch 3. When unlocking is required, the abutment 52 can be rotated away from the latch 3 by external force. When the abutment 52 separates from the latch 3, under the action of the first torsion spring 32, the latch 3 can automatically rotate from the second position to the first position (that is, change from the locked state to the unlocked state), thereby realizing quick unlocking.

[0038] In one specific embodiment, the elastic component 5 further includes a first operating member 54 connected to the abutment member 52. The first operating member 54 is used to rotate the abutment member 52 and separate it from the locking tongue 3 under the action of external force. The first operating member 54 may be a pull rope connected to the abutment member 52 or a protrusion integrally connected to the abutment member 52, so that the user can rotate the abutment member 52 around the third positioning axis 51 by pulling the pull rope or turning the protrusion, thereby disengaging it from the abutment part 35 and unlocking it. During the process of the locking tongue 3 rotating from the first position to the second position, the outer periphery of the locking tongue 3 slides relative to the abutment member 52 until it abuts and fixes against the abutment member 52. That is, during the locking process, the user only needs to operate the pushing member 21, which is convenient to use. Furthermore, as shown in Figure 4, the abutment member 52 is also provided with a limiting protrusion 521, and the fixing frame 1 is provided with a limiting groove 14 for limiting and cooperating with the limiting protrusion 521. That is, the limiting protrusion 521 on the elastic component 5 is restricted within the limiting groove 14 of the fixing frame 1. Under the action of the second torsion spring 53, the limiting protrusion 521 of the elastic component 5 is always in contact with the upper surface of the limiting groove 14. In the locked state, the abutment part 35 of the elastic component 5 abuts against the locking tongue 3. In the unlocked state, the elastic component 5 does not contact the locking tongue 3.

[0039] As shown in Figures 4 and 7, in this embodiment, a guide rod 212 is installed on the fixing frame 1, a spring 213 is sleeved on the guide rod 212, and a pusher 21 is sleeved on the guide rod 212, with the spring 213 located between the pusher 21 and the fixing frame 1. The guide rod 212, spring 213, and pusher 21 are all located on one side of the fixing frame 1. The length extension direction of the guide rod 212 can be parallel to the guiding direction of the fifth guide hole 12. That is, the first transmission shaft 223 connecting the latch 3 can slide in the opposite direction of the movement of the pusher 21 through the transmission assembly 22, thereby driving the latch 3 to rotate. The spring force of spring 213 acting on push member 21 is in the same direction as the guiding direction of fifth guide hole 12. When unlocking is required, the user only needs to pull the first operating member 54 to separate the abutment member 52 from the locking tongue 3. The spring force of spring 213 will cause push member 21 to automatically return to its initial position (the position in the unlocked state). At the same time, push member 21 will also drive the relevant components of transmission assembly 22 to automatically return to their initial state, achieving quick unlocking. Further, in this embodiment, push member 21 includes push plate 211 rotatably connected to transmission assembly 22 and second operating member 2113 connected to push plate 211. Second operating member 2113 may be a protrusion integrally connected to push plate 211 for the user to perform a pushing operation.

[0040] As shown in Figures 6 and 7, in this embodiment, the fixed frame 1 is also equipped with a stop block 6 that matches the shape of the locking hole 41 and a connecting block 7 connected to the stop block 6. The connecting block 7 is connected to the fixed frame 1 and the push plate 211 through a rotating shaft 8. The fixed frame 1 is also provided with a third guide hole 11 for the rotating shaft 8 to pass through and for sliding cooperation with the rotating shaft 8. The push plate 211 also has a fourth guide hole 2112 for the rotating shaft 8 to pass through and for sliding cooperation with the rotating shaft 8. The guiding directions of the third guide hole 11 and the fourth guide hole 2112 are different. The connecting block 7 is used to drive the stop block 6 to move with the push plate 211 during the unlocking process so that the stop block 6 enters the locking hole 41.

[0041] Specifically, the stop block 6 and the connecting block 7 can be integrally connected. When the push plate 211 moves, it can synchronously drive the connecting block 7 to move. During this process, under the guidance of the third guide hole 11 and the fourth guide hole 2112, the connecting block 7 can also rotate at a certain angle with the fixed frame 1, so that the stop block 6 can smoothly enter and exit the locking hole 41. In some specific embodiments, the fixed frame 1 can also be provided with a sixth guide hole 13 spaced apart from the third guide hole 11. The fixed frame 1 and the connecting block 7 are also connected by a guide shaft 9, that is, the guide shaft 9 passes through the sixth guide hole 13 and connects with the connecting block 7, which can further improve the stability of the connecting block 7. In the unlocked state, the stop block 6 can be put into the locking hole 41. At this time, the surface of the stop block 6 is flush with the surface of the housing. When locking is required, the pusher 21 can drive the connecting block 7 to move during its movement, thereby causing the stop block 6 to automatically retract into the housing. The structure is ingeniously designed, and the overall appearance of the locking mechanism 100 is more aesthetically pleasing.

[0042] As shown in Figures 1-7, in this embodiment, the locking device includes a detachable optional component and a locking mechanism 100 detachably connected to the detachable optional component. The detachable optional component can refer to a car hood or other devices that need to be locked, and is not limited here. A locking hole 41 and a clearance opening 42 can be provided on the housing 4. The position and shape of the locking hole 41 are adapted to the hook 34 of the latch 3. A locking groove adapted to the shape of the hook 34 can also be provided on the detachable optional component, so that the hook 34 can pass through the locking hole 41 and engage with the locking groove to achieve locking between the detachable optional component and the locking mechanism 100. The position and shape of the clearance opening 42 are adapted to the second operating member 2113. A guide surface for sliding engagement with the second operating member 2113 is also formed on the clearance opening 42. The end of the second operating member 2113 away from the push plate 211 passes through the clearance opening 42 and extends outside the housing, which is convenient for user operation. Many locking mechanisms 100 in related technologies can only lock between internal components of a product, while the locking mechanism 100 provided in this embodiment can extend a locking tongue 3 from the housing 4 to lock detachable optional components. It has a clever structure, is easy to use and operate, and has an attractive appearance.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A locking mechanism for locking and securing with a detachable optional component, characterized in that, The device includes a housing detachably connected to the detachable optional component, a mounting bracket installed within the housing, a drive assembly slidably connected to the mounting bracket, and a latch movably connected to the drive assembly. The housing has a locking hole, the mounting bracket has a first positioning shaft, the latch is rotatably connected to the first positioning shaft, and one end of the latch away from the first positioning shaft has a hook that is adapted to the locking hole and is curved. The drive assembly is used to drive the latch to rotate from a first position to a second position around the first positioning shaft. When the latch rotates to the first position, the hook is located inside the housing. When the latch rotates to the second position, one end of the hook protrudes from the locking hole and engages with the detachable optional component outside the housing.

2. The locking mechanism according to claim 1, characterized in that, The drive assembly includes a pusher that slides with the fixed frame, a transmission assembly rotatably connected to the pusher, and a first transmission shaft connecting the transmission assembly and the latch. The first transmission shaft is also slidably connected with the fixed frame. The latch is provided with a first guide hole through which the first transmission shaft passes. The first guide hole is also used to slide with the first transmission shaft to realize relative rotation between the latch and the fixed frame.

3. The locking mechanism according to claim 2, characterized in that, A first torsion spring is also sleeved on the first positioning shaft, and the first torsion spring is connected between the latch and the fixing bracket; the first torsion spring is used to provide a restoring force for the rotation of the latch so that the hook can be disengaged from the locking hole.

4. The locking mechanism according to claim 2, characterized in that, The transmission assembly includes a first connecting rod rotatably connected to the first transmission shaft and a second connecting rod rotatably connected to the end of the first connecting rod away from the first transmission shaft. The end of the second connecting rod away from the first connecting rod is also rotatably connected to the pusher via the second transmission shaft. The pusher has a second guide hole through which the second transmission shaft passes and for sliding cooperation with the second transmission shaft. The guiding direction of the second guide hole is parallel to and opposite to the sliding direction of the first transmission shaft. A second positioning shaft is also rotatably connected between the first connecting rod and the fixed frame. The first connecting rod is used to rotate around the second positioning shaft under the drive of the second connecting rod and drive the first transmission shaft to slide relative to the fixed frame.

5. The locking mechanism according to claim 1, characterized in that, The locking mechanism further includes an elastic component mounted on the fixed frame, the elastic component being used to abut against the latch when the latch is rotated to the second position.

6. The locking mechanism according to claim 5, characterized in that, The elastic component includes a third positioning shaft connected to the fixing frame, an abutment sleeved on the third positioning shaft, and a second torsion spring sleeved on the third positioning shaft. The second torsion spring is connected between the fixing frame and the abutment, and is used to provide a force to the abutment in the direction of the latch.

7. The locking mechanism according to claim 6, characterized in that, The elastic component further includes a first operating member connected to the abutment member, the first operating member being used to rotate the abutment member and separate it from the hook under the action of an external force.

8. The locking mechanism according to claim 2, characterized in that, A guide rod is installed on the fixed frame, and the pushing component is sleeved on the guide rod. A spring is also connected between the pushing component and the fixed frame, and the spring is sleeved on the guide rod.

9. The locking mechanism according to claim 2, characterized in that, The pushing component includes a push plate rotatably connected to the transmission assembly and a second operating component connected to the push plate.

10. The locking mechanism according to claim 9, characterized in that, The fixing frame is also equipped with a stop block adapted to the shape of the locking hole, a connecting block connected to the stop block, and a rotating shaft connected between the connecting block and the push plate. The fixing frame is also provided with a third guide hole for the rotating shaft to pass through and for sliding engagement with the rotating shaft. The push plate also has a fourth guide hole for the rotating shaft to pass through and for sliding engagement with the rotating shaft. The third guide hole and the fourth guide hole have different guiding directions. The connecting block is used to move the stop block along with the movement of the push plate during the unlocking process, so that the stop block enters the locking hole.

11. A locking device, characterized in that, It includes detachable optional components and a locking mechanism as described in any one of claims 1-10.

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