Locking mechanism and locking device

Abstract

The invention provides a locking mechanism and a locking device. The locking mechanism is used for being locked and fixed with a detachable optional assembly. The locking mechanism comprises a shell detachably connected with the detachable matching assembly, a fixing frame installed in the shell, a driving assembly slidably connected with the fixing frame and a spring bolt movably connected to the driving assembly. A locking hole is formed in the shell, a first positioning shaft is arranged on the fixing frame, the spring bolt is rotationally connected with the first positioning shaft, and a bent buckling hook matched with the locking hole is formed at the end, away from the first positioning shaft, of the spring bolt. The driving assembly is used for driving the spring bolt to rotate from a first position to a second position around the first positioning shaft, and when the spring bolt rotates to the first position, the buckle hook is located in the shell; and when the spring bolt rotates to a second position, one end of the buckle hook penetrates out of the locking hole and is buckled and fixed with the detachable matching assembly outside the shell. According to the locking mechanism, the locking mechanism can be locked and fixed with the detachable optional assembly in the shell.

Description

[Technical field]

[0001] The present invention relates to the technical field of locks, and in particular to a locking mechanism and a locking device. [Background technology]

[0002] With the continuous development of technology, locking mechanisms are flexibly applied to many mechanical equipment, and are more common in automobiles, medical equipment, toys, door locks and other application occasions. In the locking mechanism of the related art, a locking hole is usually set on the shell, and a locking part that matches the locking hole is set on the movable part, and then the movable part can be pushed to make the locking part and the locking hole engage or disengage from each other to achieve locking or unlocking. However, most locking mechanisms can only achieve locking between internal components of the product, and no matter whether it is in the locked state or the locked state, the entire locking mechanism and the locked object are all exposed, which affects the user's aesthetic feeling and has a limited scope of application. [Summary of the invention]

[0003] The object of the present invention is to provide a locking mechanism and a locking device, which can at least solve the problem that the locking mechanism in the related art can only achieve the locking between the internal components of the product.

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

[0005] On the one hand, a locking mechanism is provided for locking and fixing a detachable optional component, the locking mechanism comprising: a shell detachably connected to the detachable optional component, a fixing frame installed in the shell, a driving assembly slidably connected to the fixing frame, and a locking tongue movably connected to the driving assembly; the shell is provided with 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 buckle hook that is adapted to the locking hole and is curved is formed at one end of the locking tongue away from the first positioning shaft; the driving assembly is used to drive the locking tongue to rotate from a first position to a second position around the first positioning shaft, wherein when the locking tongue rotates to the first position, the buckle hook is located inside the shell; when the locking tongue rotates to the second position, one end of the buckle hook passes through the locking hole and is buckled and fixed to the detachable optional component outside the shell.

[0006] Furthermore, the driving assembly includes a pushing member that slides with the fixed frame and a transmission assembly that is rotatably connected to the pushing member. The transmission assembly is connected to the locking tongue through a first transmission shaft, and the first transmission shaft is also connected to the fixed frame in a sliding manner. The locking tongue is provided with a first guide hole for the first transmission shaft to pass through, and the first guide hole is also used to slide with the first transmission shaft to achieve relative rotation between the locking tongue and the fixed frame.

[0007] Furthermore, a first torsion spring is sleeved on the first positioning shaft, and the first torsion spring is connected between the lock tongue and the fixing frame; the first torsion spring is used to provide a restoring force for the rotation of the lock tongue so that the buckle hook withdraws 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 an 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 pushing member through the second transmission shaft, and a second guide hole is formed in the pushing member for the second transmission shaft to pass through and for slidingly cooperating with the second transmission shaft, and the guiding direction of the second guide hole is reversely parallel 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, and 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 and the fixed frame to slide relative to each other.

[0009] Furthermore, the locking mechanism also includes an elastic component mounted on the fixing frame, and the elastic component is used for abutting against the locking tongue when the locking tongue rotates to the second position.

[0010] Furthermore, the elastic component includes a third positioning shaft connected to the fixed frame, an abutment member 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 fixed frame and the abutment member, and the second torsion spring is used to provide a force for the abutment member toward the direction of the lock tongue.

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

[0012] Furthermore, a guide rod is installed on the fixing frame, the pushing member is sleeved on the guide rod, and a spring is connected between the pushing member and the fixing frame, and the spring is sleeved on the guide rod.

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

[0014] Furthermore, a block adapted to the shape of the locking hole and a connecting block connected to the block are also installed on the fixed frame. The connecting block is connected to a shell detachably connected to the detachable optional component, a fixed frame installed in the shell, and a push plate through a rotating shaft. A third guide hole for the rotating shaft to pass through and for slidingly cooperating with the rotating shaft is also provided in the fixed frame. The push plate also has a fourth guide hole for the rotating shaft to pass through and for slidingly cooperating with the rotating shaft. The guiding directions of the third guide hole and the fourth guide hole are different. The connecting block is used to drive the block to move as the push plate moves during the unlocking process, so that the 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.

[0016] As can be seen from the above, the beneficial effects of the locking mechanism and locking device provided by the embodiment of the present invention are: the lock tongue is connected to the driving component and is also rotatably connected to the fixing frame. The driving component can slide relative to the fixing frame under the action of external force and drive the lock tongue to rotate, so that the buckle hook of the lock tongue can enter and exit the locking hole, thereby achieving locking or unlocking. The buckle hook of the present application can pass through the locking hole and buckle and fix with the detachable optional component outside the shell, thereby achieving multi-directional position restriction of the lock tongue. The detachable optional component can be locked from the inside of the shell to the outside without setting an additional limiting mechanism, which is convenient for users to use and has strong practicality. In addition, the shell is located outside the fixing frame, lock tongue and other structures to avoid direct exposure of complex structural components, making the locking mechanism more beautiful.

Brief Description of the Drawings

[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 a locked state in an embodiment of the present invention;

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

[0020] Figure 4 is a schematic structural diagram of the locking mechanism in an embodiment of the present invention without the housing and the pusher;

[0021] Figure 5 It is a schematic diagram of the overall structure of the lock 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. [Specific implementation method]

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but cannot be understood as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “circumferential”, “radial”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] Example:

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

[0029] Specifically, the lock tongue 3 is connected to the driving assembly 2 and is also rotatably connected to the fixing frame 1. The driving assembly 2 can slide relative to the fixing frame 1 under the action of an external force, and drive the lock tongue 3 to rotate, so that the lock tongue 3 rotates around the fixing frame 1 to the second position or the first position; when the lock tongue 3 rotates to the second position, the buckle hook 34 passes through the locking hole 41 and is buckled and fixed with the locking groove of the detachable optional component outside the shell 4; when the lock tongue 3 rotates to the first position, the buckle hook 34 gradually separates from the detachable optional component and the shell 4, thereby realizing the locking and unlocking of the locking mechanism 100. The buckle hook 34 of this embodiment can pass through the locking hole 41 and be buckled and fixed with the locking groove of the detachable optional component outside the shell 4, thereby realizing the multi-directional position restriction of the lock tongue 3, and the buckle hook 34 can be extended outward from the inside of the shell 4 to lock with the detachable optional component without setting an additional limit component, which is convenient for users to use and has a wide range of applications.

[0030] like Figure 3 and 4 As shown, in this embodiment, the driving assembly 2 includes a pushing member 21 that slides with the fixing frame 1 and a transmission assembly 22 that is rotatably connected to the pushing member 21. The transmission assembly 22 is connected to the locking tongue 3 through a first transmission shaft 223, and the first transmission shaft 223 is also connected to the fixing frame 1 in a sliding manner; the locking tongue 3 is provided with a first guide hole 33 for the first transmission shaft 223 to pass through, and the first guide hole 33 is also used to slide with the first transmission shaft 223 to achieve relative rotation between the locking tongue 3 and the fixing frame 1.

[0031] Specifically, the first transmission shaft 223 is arranged between the transmission assembly 22, the fixing frame 1 and the locking tongue 3; the locking tongue 3 is provided with a first guide hole 33 for the first transmission shaft 223 to pass through, and the first guide hole 33 can limit the position and direction of movement of the locking tongue 3, and then the relative rotation between the locking tongue 3 and the fixing frame 1 can be achieved through the sliding cooperation between the first guide hole 33 and the first transmission shaft 223. The fixing frame 1 is provided with a fifth guide hole 12 for the first transmission shaft 223 to pass through and for sliding cooperation with the first transmission shaft 223, and the fifth guide hole 12 can limit the position and direction of movement of the first transmission shaft 223. The guiding direction of the fifth guide hole 12 can be parallel to the pushing direction of the pushing member 21. To achieve locking, the user can apply a pushing force to the pushing member 21, and the pushing member 21 slides relative to the fixing frame 1 under the action of the pushing force, and drives the transmission component 22 to move; further, the transmission component 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, and at the same time, the first transmission shaft 223 will also slide relative to the first guide hole 33 of the lock tongue 3, so that the lock tongue 3 and the fixing frame 1 rotate relative to each other, so that the tail end of the lock tongue 3 can pass through the locking hole 41 to achieve locking with the detachable optional component.

[0032] It is understandable that in some other embodiments, the driving assembly 2 may not be provided with the transmission assembly 22, that is, the pusher 21 may be directly connected to the first transmission shaft 223. The first transmission shaft 223 thus provided can also slide with the fifth guide hole 12 as the pusher 21 moves, thereby driving the lock tongue 3 to rotate, and finally achieving locking or unlocking of the locking mechanism 100. This is not limited here.

[0033] Further, in this embodiment, a first positioning shaft 31 is provided between the fixing frame 1 and the lock tongue 3, and the fixing frame 1 and the lock tongue 3 are rotationally connected through 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 lock tongue 3 and the fixing frame 1; the first torsion spring 32 is used to provide a restoring force for the lock tongue 3, so that the lock tongue 3 rotates from the second position to the first position around the first positioning shaft 31. In a specific embodiment, an installation space a with an upper side and two ends open is formed in the fixing frame 1, and the lock tongue 3 is located in the installation space a in the unlocked state. The first positioning shaft 31 is connected to both sides of the fixing frame 1, and one end of the lock tongue 3 and the first torsion spring 32 are sleeved on the first positioning shaft 31, and the first torsion spring 32 is connected between the lock tongue 3 and the fixing frame 1. The first positioning shaft 31 can be used as a rotation center, so that the lock 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 to rotate the lock tongue 3 from the second position to the first position around the first positioning axis 31. That is, when the user operates the elastic component 5 to cancel the abutment force of the elastic component 5 on the lock tongue 3, under the action of the first torsion spring 32, the lock tongue 3 can automatically rotate from the second position to the first position (that is, the lock tongue 3 automatically changes from the locked state to the unlocked state). The structure is cleverly arranged 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 an 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 pushing member 21 through the second transmission shaft 224, and a second guide hole 2111 is formed in the pushing member 21 for the second transmission shaft 224 to pass through and for slidingly cooperating with the second transmission shaft 224, and the guiding direction of the second guide hole 2111 is reversely 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, and the first connecting rod 221 is used to rotate around the second positioning shaft 225 driven by 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 be moved in the opposite direction of the movement of the pusher 21 through the transmission assembly 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] like Figure 3-5 as well as Figure 7 As shown, in this embodiment, the locking mechanism 100 also includes an elastic component 5 installed on the fixing frame 1, and the elastic component 5 is used to abut against different parts of the lock tongue 3 when the lock tongue 3 rotates to the second position and the first position respectively; wherein, when the lock tongue 3 rotates to the second position, the buckle 34 extends out of the shell 4 and is buckled and fixed with the detachable optional component; when the lock tongue 3 rotates to the first position, the buckle 34 is separated from the shell 4.

[0036] Specifically, Figure 5 As shown, the outer peripheral side of the lock tongue 3 is provided with abutment portions 35 at intervals, wherein the side where the abutment portions 35 are located is away from the buckling side of the buckle hook 34. When the buckle hook 34 passes through the locking hole 41 and extends out of the housing 4 to be buckled and fixed with the detachable optional component, the elastic component 5 can form an abutment with the abutment portion 35, thereby improving the locking stability of the locking mechanism 100.

[0037] Furthermore, if Figure 3 , 4 As shown in Figures 7 and 8, in this embodiment, the elastic component 5 includes a third positioning shaft 51 connected to the fixing 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 fixing frame 1 and the abutment 52. The second torsion spring 53 is used to provide the abutment 52 with a force in the direction of the lock tongue 3. That is, by using the second torsion spring 53, the elastic component 5 always has a force in the direction of the lock tongue 3. When unlocking is required, the abutment 52 can be rotated in a direction away from the lock tongue 3 by an external force. When the abutment 52 is separated from the lock tongue 3, under the action of the first torsion spring 32, the lock tongue 3 can automatically rotate from the second position to the first position (that is, from the locked state to the unlocked state), thereby realizing quick unlocking.

[0038] In a specific embodiment, the elastic component 5 also includes a first operating member 54 connected to the abutment 52, and the first operating member 54 is used to rotate the abutment 52 and separate it from the lock tongue 3 under the action of an external force. The first operating member 54 can be a pull rope connected to the abutment 52 or a protrusion integrally connected to the abutment 52, so that the user can pull the pull rope or bend the protrusion to rotate the abutment 52 around the third positioning axis 51, thereby disengaging from the abutment portion 35 to achieve unlocking. During the process of the lock tongue 3 rotating from the first position to the second position, the outer peripheral side of the lock tongue 3 slides relative to the abutment 52 until it abuts and is fixed with the abutment 52, that is, in the process of achieving locking, the user only needs to operate the push member 21, which is convenient to use. In addition, if Figure 4As shown, the abutment 52 is also provided with a limiting protrusion 521, and the fixing frame 1 is provided with a limiting groove 14 for limiting cooperation with the limiting protrusion 521, that is, the limiting protrusion 521 on the elastic component 5 is limited in the limiting groove 14 of the fixing frame 1, and 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, and in the locked state, the abutment portion 35 of the elastic component 5 abuts against the lock tongue 3, and in the unlocked state, the elastic component 5 has no contact with the lock tongue 3.

[0039] like Figure 4 and 7 As shown, 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 the pusher 21 is sleeved on the guide rod 212, and the spring 213 is located between the pusher 21 and the fixing frame 1. The guide rod 212, the spring 213 and the pusher 21 are all arranged on one side of the fixing frame 1, and the length extension direction of the guide rod 212 can be parallel to the guide direction of the fifth guide hole 12, that is, the first transmission shaft 223 connected to the lock tongue 3 can slide in the opposite direction of the movement of the pusher 21 through the transmission assembly 22, and then the lock tongue 3 is driven to rotate by the first transmission shaft 223. The direction of the elastic force of the spring 213 acting on the push member 21 is the same as the guiding direction of the fifth guide hole 12. When unlocking is required, the user only needs to pull the first operating member 54 to separate the abutting member 52 from the lock tongue 3. The elastic force of the spring 213 will automatically return the push member 21 to the initial position (the position in the unlocked state). At the same time, the push member 21 will also drive the relevant parts of the transmission assembly 22 to automatically return to the initial state, thereby achieving rapid unlocking. Further, in this embodiment, the push member 21 includes a push plate 211 rotatably connected to the transmission assembly 22 and a second operating member 2113 connected to the push plate 211. The second operating member 2113 can be a protrusion integrally connected to the push plate 211, which is used for the user to perform a pushing operation.

[0040] like Figure 6 and 7 As shown, in the present embodiment, a stopper 6 matching the shape of the locking hole 41 and a connecting block 7 connected to the stopper 6 are also installed on the fixing frame 1. The connecting block 7 is connected to the fixing frame 1 and the push plate 211 through the rotating shaft 8. The fixing frame 1 is also provided with a third guide hole 11 for the rotating shaft 8 to pass through and for slidingly cooperating 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 slidingly cooperating 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 stopper 6 to move with the movement of the push plate 211 during the unlocking process, so that the stopper 6 enters the locking hole 41.

[0041] Specifically, the block 6 and the connecting block 7 can be connected as one piece. When the push plate 211 moves, the connecting block 7 can be driven to move synchronously. In this process, under the guiding action 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 fixing frame 1, so that the block 6 can smoothly enter and exit the locking hole 41. In some specific embodiments, a sixth guide hole 13 spaced apart from the third guide hole 11 can also be provided in the fixing frame 1, and the fixing 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 block 6 can enter the locking hole 41, and at this time, the surface of the block 6 is flush with the surface of the shell; when locking is required, the pushing member 21 can drive the connecting block 7 to move during the movement, so that the block 6 automatically retracts back into the shell, the structural setting is ingenious, and the overall appearance of the locking mechanism 100 is more beautiful.

[0042] like Figure 1-7 As shown, 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 may refer to a car hood or other device that needs to be locked, which is not limited here. A locking hole 41 and a clearance opening 42 may be provided on the housing 4. The position and shape of the locking hole 41 are adapted to the buckle 34 of the lock tongue 3, and a locking groove adapted to the shape of the buckle 34 may also be provided on the detachable optional component, so that the buckle 34 can pass through the locking hole 41 and be fastened and fixed 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, and a guide surface for slidingly cooperating 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 to the outside of the housing, which is convenient for user operation. Many locking mechanisms 100 in the related art can only realize the locking between internal components of the product, while the locking mechanism 100 provided in this embodiment can extend the lock tongue 3 from the shell 4 to lock the detachable optional components, and has a clever structural setting, easy operation and beautiful appearance.

[0043] The above are only 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 in the protection scope of the present invention.

Claims

1. A locking mechanism for locking and fixing a detachable optional component, characterized in that: The invention comprises a shell body detachably connected to the detachable optional component, a fixing frame installed in the shell body, a driving component slidably connected to the fixing frame, and a locking tongue movably connected to the driving component; the shell body is provided with 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 buckle hook which is adapted to the locking hole and is curved is formed on one end of the locking tongue away from the first positioning shaft; the driving component is used to drive the locking tongue to rotate from a first position to a second position around the first positioning shaft, wherein when the locking tongue rotates to the first position, the buckle hook is located inside the shell body; when the locking tongue rotates to the second position, one end of the buckle hook passes through the locking hole and is buckled and fixed to the detachable optional component outside the shell body.

2. The locking mechanism according to claim 1, characterized in that: The driving assembly includes a pushing member that slides with the fixing frame, a transmission assembly that is rotatably connected to the pushing member, and a first transmission shaft connecting the transmission assembly and the locking tongue, and the first transmission shaft is also connected to the fixing frame in a sliding manner; the locking tongue is provided with a first guide hole for the first transmission shaft to pass through, and the first guide hole is also used to slide with the first transmission shaft to realize relative rotation between the locking tongue and the fixing 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 locking tongue and the fixing frame; the first torsion spring is used to provide a restoring force for the rotation of the locking tongue so that the buckle hook withdraws 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 an 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 pushing member through the second transmission shaft, and a second guide hole is formed in the pushing member for the second transmission shaft to pass through and for slidingly cooperating with the second transmission shaft, and the guiding direction of the second guide hole is reversely parallel 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, and 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 and the fixed frame to slide relative to each other.

5. The locking mechanism according to claim 1, characterized in that: The locking mechanism further comprises an elastic component mounted on the fixing frame, and the elastic component is used for abutting against the locking tongue when the locking tongue rotates 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 member sleeved on the third positioning shaft, and a second torsion spring sleeved on the third positioning shaft, wherein the second torsion spring is connected between the fixing frame and the abutment member, and the second torsion spring is used to provide the abutment member with a force acting in the direction of the locking tongue.

7. The locking mechanism according to claim 6, characterized in that: The elastic component further comprises a first operating member connected to the abutting member, wherein the first operating member is used for rotating the abutting member and separating the abutting member from the buckle 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 fixing frame, the pushing member is sleeved on the guide rod, a spring is further connected between the pushing member and the fixing frame, and the spring is sleeved on the guide rod.

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

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

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

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