CN218912563U - Lock catch device - Google Patents

Abstract

The application relates to a locking device and application thereof, comprising: the female buckle seat is internally provided with a movable cavity, and one end of the female buckle seat is provided with a socket; the lock tongue is arranged in the movable cavity, and one end of the lock tongue is hinged to the end part of the female buckle seat, which is far away from the socket; the male buckle seat can be inserted into the movable cavity from the socket at one end of the male buckle seat under the automatic driving of an external force so as to form a self-locking structure with the end part of the lock tongue far away from the hinge joint, and the lock tongue rotates under the automatic driving of another external force so as to automatically unlock the self-locking structure; and the manual unlocking component is arranged on the female buckle seat and is used for driving the lock tongue to rotate so as to unlock the self-locking structure. The application has the following expected technical effects: the integrated circuit is characterized in that: the automatic locking, automatic unlocking and manual unlocking functions are achieved, the whole structure is simple and firm, the working efficiency is indirectly improved, and the user experience is better.

Description

Lock catch device

Technical Field

The application relates to the technical field of locking and buckling, in particular to a locking and buckling device.

Background

The shackle is widely used as an article for connecting two articles in daily life of people. The lock catch is generally composed of a female buckle and a male buckle. When the male buckle is inserted into the female buckle, the lock tongue in the female buckle is connected with the male buckle, so that the two articles are fixed together. When two articles are required to be detached, the lock catch is separated from the male buckle through external force, and then the male buckle is pulled out of the female buckle.

The existing lock catch is complex in locking structure, complex in process of separating the lock catch and the male buckle, for example, a plurality of lock catches are generally needed to be used for locking a box door on equipment such as a carriage or a container, when the lock catch is unlocked, manual operation of a user is generally needed, the purpose of opening the box door can be achieved only by simultaneously unlocking all lock catches by a plurality of people, automatic unlocking is difficult, low working efficiency is indirectly caused, and user experience is poor.

Disclosure of Invention

The application provides a locking device to improve following technical problem:

the existing lock catch is complex in locking structure, the process of separating the lock catch from the male buckle is complex, when the lock catch is unlocked, manual operation is generally required by a user, moreover, the unlocking purpose can be achieved only by unlocking all the lock catches simultaneously by multiple people, automatic unlocking is difficult, the work efficiency is low, and the user experience is poor.

In a first aspect, the present application provides a locking device, which adopts the following technical scheme:

a locker, comprising:

the female buckle seat is internally provided with a movable cavity, and one end of the female buckle seat is provided with a socket;

the lock tongue is arranged in the movable cavity, and one end of the lock tongue is hinged to the end part of the female buckle seat, which is far away from the socket;

the male buckle seat can be inserted into the movable cavity from the socket at one end of the male buckle seat under the automatic driving of an external force so as to form a self-locking structure with the end part of the lock tongue, which is far away from the hinge joint, and the lock tongue rotates under the automatic driving of another external force so as to automatically unlock the self-locking structure; the method comprises the steps of,

the manual unlocking component is installed on the female buckle seat and used for driving the lock tongue to rotate so as to unlock the self-locking structure.

By adopting the technical scheme, the male buckle seat can be automatically driven by external force and inserted into the socket so as to form a self-locking structure between the movable cavity and the end part of the lock tongue, thereby preventing the female buckle seat from being separated from the male buckle seat; the lock tongue can be automatically driven to rotate by external force, the self-locking structure is automatically unlocked, and then the male buckle seat is driven to reset, so that the female buckle seat and the male buckle seat can be separated; meanwhile, a manual unlocking component is additionally arranged for manually unlocking the self-locking structure, so that the locking device with the design is integrated with: the automatic locking, automatic unlocking and manual unlocking functions are achieved, the whole structure is simple and firm, the working efficiency is indirectly improved, and the user experience is better.

Optionally, the self-locking structure includes: the self-locking device comprises a self-locking hole arranged at the end part of a pin seat and a self-locking block arranged at the end part of a lock tongue, which is far away from a hinge, wherein an inclined plane is arranged on one side of the self-locking block, which is close to the pin seat, an elastic sheet is arranged on the box seat, the end part of the pin seat is gradually extruded from an inserting opening in the process of gradually inserting the pin seat, the inclined plane is gradually extruded to drive the lock tongue to rotate and extrude the elastic sheet, and after the pin seat is inserted in place, the lock tongue is driven by the elastic sheet until the self-locking block is clamped in the self-locking hole, so that the self-locking purpose is realized.

Through adopting above-mentioned technical scheme, from locking piece and auto-lock hole mutually support, can realize the effect of closure, in addition at the complete card of auto-lock piece in-process in from the lockhole, the inclined plane can be with the thrust conversion of pin seat tip for the pressure that the spring bolt extruded the elastic piece, and then follow-up elastic piece has the trend that resets under the drive of elastic restoring force to the auto-lock piece card smoothly is gone into from in the lockhole, the auto-lock structure of above-mentioned design, simple structure and firm, the closure is effectual.

Optionally, the elastic sheet is provided with an avoidance hole corresponding to the self-locking block, the avoidance hole is set to be isosceles trapezoid, and the end part of the lock tongue provided with the self-locking block is set to be isosceles trapezoid matched with the avoidance hole.

Through adopting above-mentioned technical scheme, at the spring bolt by pin thread seat tip extrusion pivoted in-process, the spring bolt is equipped with can rotate to dodging in the hole from the tip of locking piece to vacate more spaces and supply the spring bolt to rotate, and be favorable to the spring bolt extrusion elastic piece, be convenient for block smoothly from the locking piece from in the lockhole.

Optionally, an automatic unlocking hole is further formed in the female buckle seat, and the automatic unlocking hole and the self-locking block are correspondingly arranged.

Through adopting above-mentioned technical scheme, automatic unlocking hole makes things convenient for outside automatic drive force to apply smoothly on the auto-lock piece, and then conveniently drives the spring bolt through the auto-lock piece and rotate, realizes automatic unblock purpose fast.

Optionally, a plurality of fixture blocks are arranged on two sides of the elastic piece, a plurality of clamping grooves are arranged on two sides of the female buckle seat, the fixture blocks are correspondingly arranged with the clamping grooves, and the fixture blocks are clamped and fixed in the clamping grooves.

Through adopting above-mentioned technical scheme, fixture block and draw-in groove mutually support, can make firm connection between elastic slice and the box seat, above-mentioned mounting means is easier to assemble moreover.

Optionally, a limiting groove is formed in the female buckle seat, a limiting block is arranged on the lock tongue, and the limiting block is limited in the limiting groove when the lock tongue rotates in the movable cavity.

Through adopting above-mentioned technical scheme, spacing groove and stopper mutually support, are favorable to the spring bolt to rotate in the activity cavity stability, and whole structure is firm more stable, difficult not hard up.

Optionally, the box seat is in socket department is provided with the guide board, the inboard of guide board is provided with the arc guide face, before the pin seat tip inserts the socket, the arc guide face be used for with pin seat tip looks butt.

Through adopting above-mentioned technical scheme, the arc guide face of design on the guide board can be with in the quick direction socket of pin thread seat tip, is favorable to the accurate butt joint of box seat and pin thread seat.

Optionally, the manual unlocking assembly includes: the novel lock comprises a first rotating shaft, a handle and a first limiting piece, wherein one end part of the first rotating shaft is connected with the handle, the handle and the first rotating shaft form an L shape, two ends of the first rotating shaft extend out of two sides of a box seat, two ends of the first rotating shaft are provided with first annular grooves, the first limiting piece is clamped in the first annular grooves and is abutted to the outer side face of the box seat, an extrusion block is arranged on the first rotating shaft, and when the handle drives the first rotating shaft to rotate, the extrusion block is abutted to the lock tongue and drives the lock tongue to rotate.

Through adopting above-mentioned technical scheme, the staff can drive first pivot through the handle and rotate, and then first pivot when rotating, and extrusion piece can drive the spring bolt and rotate to stable purpose that realizes manual unblock, two first spacing pieces simultaneously can make firm connection between first pivot and the box seat, difficult not hard up, and equipment, dismantlement are all more convenient moreover.

Optionally, the tip of box seat is provided with second pivot and second spacing piece, the both ends of second pivot follow the both sides of box seat stretch out, the both ends of second pivot are provided with the second annular, first spacing piece joint in the second annular and butt in the lateral surface of box seat, the tip of spring bolt is provided with the confession the perforation that the second pivot runs through.

Through adopting above-mentioned technical scheme, two second spacing pieces can make firm connection between second pivot and the box seat, are difficult for not hard up, can guarantee to rotate between spring bolt and the box seat stably, and equipment, dismantlement are all more convenient moreover.

In a second aspect, the present application provides an application of a locking device, which adopts the following technical scheme:

an application of the locker as described above, comprising:

a first connecting body;

the first driving piece is arranged on the first connecting body, the male buckle seat is connected with the first driving piece, and the first driving piece is used for automatically driving the end part of the male buckle seat to be inserted into the socket and achieving the self-locking purpose;

the female buckle seat is fixedly arranged on the second connector; the method comprises the steps of,

the second driving piece is arranged on the second connecting body and is used for automatically driving the lock tongue to rotate so as to automatically unlock the self-locking structure.

Through adopting above-mentioned technical scheme, locking device can realize the connection and the separation between first connector and the second connector, and first driving piece can drive the pin thread seat tip automatically simultaneously and insert in the socket to realize automatic locking purpose, the second driving piece can drive the spring bolt automatically and rotate, and realize automatic unblock purpose, has indirectly promoted work efficiency, and user experience feels better.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the male buckle seat can be automatically driven by external force and inserted into the socket to form a self-locking structure between the movable cavity and the end part of the lock tongue so as to prevent the female buckle seat from being separated from the male buckle seat; the lock tongue can be automatically driven to rotate by external force, the self-locking structure is automatically unlocked, and then the male buckle seat is driven to reset, so that the female buckle seat and the male buckle seat can be separated; meanwhile, a manual unlocking component is additionally arranged for manually unlocking the self-locking structure, so that the locking device with the design is integrated with: the automatic locking, automatic unlocking and manual unlocking functions are achieved, the whole structure is simple and firm, the working efficiency is indirectly improved, and the user experience is better;

2. in the process that the lock tongue is extruded and rotated by the end part of the pin seat, the end part of the lock tongue provided with the self-locking block can rotate to the avoidance hole so as to vacate more space for the lock tongue to rotate, and the lock tongue is favorable for extruding the elastic piece, so that the self-locking block can be conveniently and smoothly clamped into the self-locking hole.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, 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 diagram of a front view of a latch according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a back view of the latch device according to the embodiment of the present application.

Fig. 3 is an exploded view of a locker of an embodiment of the present application.

Fig. 4 is a schematic structural diagram of an application of the locker of the embodiment of the present application.

Reference numerals illustrate:

101. a first connecting body; 102. a first driving member; 103. a second connector; 104. a second driving member; 105. a locking device;

1. a female buckle seat; 11. a socket; 12. an elastic sheet; 121. avoidance holes; 122. a clamping block; 13. automatic unlocking holes; 14. a clamping groove; 15. a limit groove; 16. a guide plate; 2. a bolt; 21. a self-locking block; 22. an inclined plane; 23. a limiting block; 3. a male buckle seat; 31. self-locking holes; 4. a manual unlocking assembly; 41. a first rotating shaft; 411. extruding a block; 42. a handle; 43. a first limiting piece; 5. a second rotating shaft; 6. and the second limiting piece.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

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 present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The present application is described in further detail below in conjunction with figures 1-3.

The embodiment of the application discloses a locking device. Referring to fig. 1 to 3, the locker 105 includes:

the female buckle seat 1, wherein a movable cavity is arranged in the female buckle seat 1, one end of the female buckle seat 1 is provided with a socket 11, the female buckle seat 1 is mainly made of steel plates, the two sides of the female buckle seat 1 are provided with flanging, and the two sides of the flanging are respectively provided with two mounting holes;

the lock tongue 2 is arranged in the movable cavity, and one end of the lock tongue 2 is hinged to the end part of the female buckle seat 1, which is far away from the socket 11;

the male buckle seat 3, under the automatic driving of an external force, one end of the male buckle seat 3 can be inserted into the movable cavity from the socket 11, and a self-locking structure is formed at the end far away from the hinge joint of the lock tongue 2, under the automatic driving of another external force, the lock tongue 2 rotates to automatically unlock the self-locking structure, the male buckle seat 3 is made of a steel plate, and two mounting holes are respectively formed at two sides of the male buckle seat 3; the method comprises the steps of,

the manual unlocking component 4 is arranged on the female buckle seat 1, and the manual unlocking component 4 is used for driving the lock tongue 2 to rotate so as to unlock the self-locking structure.

The self-locking structure comprises: the self-locking hole 31 arranged at the end part of the pin holder 3 and the self-locking block 21 arranged at the end part of the lock tongue 2 far away from the hinge joint, wherein an inclined plane 22 is arranged at one side of the self-locking block 21 close to the pin holder 3, the box holder 1 is provided with an elastic sheet 12, the inclined plane 22 is gradually extruded to drive the lock tongue 2 to rotate and extrude the elastic sheet 12 in the gradual inserting process of the end part of the pin holder 3 from the socket 11, and after the pin holder 3 is inserted in place, the lock tongue 2 is driven by the elastic sheet 12 until the self-locking block 21 is clamped in the self-locking hole 31, thereby realizing the self-locking purpose.

The self-locking block 21 and the self-locking hole 31 are matched with each other, so that the locking effect can be achieved, in addition, in the process that the self-locking block 21 is completely clamped into the self-locking hole 31, the inclined plane 22 can convert the thrust of the end part of the male buckle seat 3 into the pressure of the spring bolt 2 for extruding the elastic piece 12, then the spring bolt 2 has a reset trend under the driving of elastic restoring force of the elastic piece 12, so that the self-locking block 21 is smoothly clamped into the self-locking hole 31, and the self-locking structure of the design is simple and firm in structure and good in locking effect.

The elastic sheet 12 is provided with an avoidance hole 121 which is correspondingly arranged with the self-locking block 21, the avoidance hole 121 is arranged into an isosceles trapezoid, and the end part of the lock tongue 2 provided with the self-locking block 21 is arranged into an isosceles trapezoid which is matched with the avoidance hole 121.

In the process that the lock tongue 2 is extruded and rotated by the end part of the pin seat 3, the end part of the lock tongue 2 provided with the self-locking block 21 can rotate into the avoidance hole 121, so that more space is vacated for the lock tongue 2 to rotate, the lock tongue 2 is facilitated to extrude the elastic piece 12, and the self-locking block 21 is conveniently and smoothly clamped into the self-locking hole 31.

The automatic unlocking hole 13 is further formed in the female buckle seat 1, the automatic unlocking hole 13 and the automatic locking block 21 are correspondingly arranged, the automatic unlocking hole 13 is convenient for external automatic driving force to be smoothly applied to the automatic locking block 21, and then the automatic unlocking is conveniently achieved by driving the lock tongue 2 to rotate through the automatic locking block 21.

Two clamping blocks 122 are respectively arranged on two sides of the elastic sheet 12, two clamping grooves 14 are respectively arranged on two sides of the box seat 1, the clamping blocks 122 and the clamping grooves 14 are correspondingly arranged, the clamping blocks 122 are clamped and fixed in the clamping grooves 14, the clamping blocks 122 and the clamping grooves 14 are mutually matched, the elastic sheet 12 and the box seat 1 can be firmly connected, and the installation mode is easier to assemble.

Be provided with spacing groove 15 on the box seat 1, spacing groove 15 is rectangular shape, is provided with stopper 23 on the spring bolt 2, and stopper 23 is square shape, and when spring bolt 2 rotated in the activity cavity, stopper 23 was limited in spacing groove 15, and spacing groove 15 and stopper 23 mutually support, are favorable to spring bolt 2 stable rotation in the activity cavity, and whole structure is more firm stable, difficult not hard up.

The box seat 1 is provided with a guide plate 16 integrally formed at the socket 11, and an arc guide surface is arranged on the inner side of the guide plate 16 and is used for being abutted against the end part of the pin seat 3 before the end part of the pin seat 3 is inserted into the socket 11.

The arc guide surface designed on the guide plate 16 can guide the end part of the pin seat 3 into the socket 11 quickly, which is beneficial to the accurate butt joint of the box seat 1 and the pin seat 3.

The manual unlocking assembly 4 includes: the handle comprises a first rotating shaft 41, a handle 42 and a first limiting piece 43, wherein one end part of the first rotating shaft 41 is connected with the handle 42, the end part and the handle 42 form an L shape, two ends of the first rotating shaft 41 extend out of two sides of a box seat 1, first annular grooves are formed in two ends of the first rotating shaft 41, the first limiting piece 43 is clamped in the first annular grooves and is abutted to the outer side face of the box seat 1, an extrusion block 411 is arranged on the first rotating shaft 41, and when the handle 42 drives the first rotating shaft 41 to rotate, the extrusion block 411 is abutted to a lock tongue 2 and drives the lock tongue 2 to rotate.

The staff can drive first pivot 41 through handle 42 and rotate, and then first pivot 41 when rotating, and extrusion piece 411 can drive spring bolt 2 to rotate to stable purpose that realizes manual unblock, two first spacing pieces 43 can make firm connection between first pivot 41 and the box seat 1 simultaneously, are difficult for not hard up, and the equipment is all more convenient moreover, dismantlement.

The end of the box seat 1 is provided with a second rotating shaft 5 and a second limiting piece 6, two ends of the second rotating shaft 5 extend out of two sides of the box seat 1, two ends of the second rotating shaft 5 are provided with second annular grooves, the first limiting piece 43 is clamped in the second annular grooves and is abutted to the outer side face of the box seat 1, and the end of the lock tongue 2 is provided with a through hole for the second rotating shaft 5 to penetrate.

The two second limiting plates 6 can firmly connect the second rotating shaft 5 with the box seat 1, are not easy to loosen, can ensure stable rotation between the lock tongue 2 and the box seat 1, and are convenient to assemble and disassemble.

The whole thickness of the locker is thinner and is approximately between 1 cm and 2 cm, and the occupied space is smaller, so that the locker with the design can be installed in a narrow space.

The locking device provided by the embodiment of the application has the following expected technical effects:

the pin seat 3 can be automatically driven by external force and inserted into the socket 11 to form a self-locking structure between the movable cavity and the end part of the lock tongue 2 so as to prevent the separation of the box seat 1 and the pin seat 3; the lock tongue 2 can be automatically driven to rotate by external force and automatically unlock the self-locking structure, and then the pin seat 3 is driven to reset, so that the box seat 1 and the pin seat 3 can be separated; meanwhile, the manual unlocking component 4 is added for manually unlocking the self-locking structure, so the locking device 105 with the design is integrated with: the automatic locking, automatic unlocking and manual unlocking functions are achieved, the whole structure is simple and firm, the working efficiency is indirectly improved, and the user experience is better.

The embodiment of the application also discloses an application of the locking device. Referring to fig. 3 and 4, comprising:

a first connecting body 101;

the first driving piece 102, the first driving piece 102 is installed on the first connecting body 101, the pin seat 3 is connected to the first driving piece 102, the first driving piece 102 is used for automatically driving the end part of the pin seat 3 to be inserted into the socket 11 and achieving the self-locking purpose, and the first driving piece 102 is specifically an air cylinder in the embodiment;

the second connector 103, the female buckle seat 1 is fixedly arranged on the second connector 103; the method comprises the steps of,

the second driving piece 104, the second driving piece 104 is installed on the second connecting body 103, the second driving piece 104 is used for automatically driving the lock tongue 2 to rotate so as to automatically unlock the self-locking structure, the second driving piece 104 is specifically an air cylinder in the embodiment, and the second driving piece 104 and the automatic unlocking hole 13 are correspondingly arranged.

The application of the locking device has the following expected technical effects:

the locking device 105 can realize connection and separation between the first connecting body 101 and the second connecting body 103, meanwhile, the first driving piece 102 can automatically drive the end part of the male buckle seat 3 to be inserted into the socket 11, the automatic locking purpose is realized, the second driving piece 104 can automatically drive the lock tongue 2 to rotate, the automatic unlocking purpose is realized, the working efficiency is indirectly improved, and the user experience is better.

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (9)

1. A latch apparatus, comprising:

the female buckle comprises a female buckle seat (1), wherein a movable cavity is formed in the female buckle seat (1), and a socket (11) is formed in one end of the female buckle seat (1);

the lock tongue (2) is arranged in the movable cavity, and one end of the lock tongue (2) is hinged to the end part of the female buckle seat (1) far away from the socket (11);

the male buckle seat (3) can be inserted into the movable cavity from the socket (11) at one end of the male buckle seat (3) under the automatic driving of an external force so as to form a self-locking structure with the end part of the lock tongue (2) far away from the hinge joint, and the lock tongue (2) rotates under the automatic driving of another external force so as to automatically unlock the self-locking structure; the method comprises the steps of,

the manual unlocking assembly (4) is arranged on the female buckle seat (1), and the manual unlocking assembly (4) is used for driving the lock tongue (2) to rotate so as to unlock the self-locking structure.

2. The latch of claim 1 wherein said self-locking structure comprises: locate self-locking hole (31) of pin thread seat (3) tip and locate lock tongue (2) keep away from on the articulated tip from latch segment (21), be close to from latch segment (21) one side of pin thread seat (3) is provided with inclined plane (22), box seat (1) is provided with elastic sheet (12), the tip of pin thread seat (3) is from the in-process of gradually inserting in socket (11), extrudeing gradually inclined plane (22) in order to drive lock tongue (2) rotation and extrusion elastic sheet (12), after pin thread seat (3) inserts in place, under the order to drive of elastic sheet (12) lock tongue (2) until self-locking segment (21) joint in self-locking hole (31) realizes the auto-lock purpose.

3. The locking device according to claim 2, wherein the elastic piece (12) is provided with an avoidance hole (121) which is arranged corresponding to the self-locking piece (21), the avoidance hole (121) is formed into an isosceles trapezoid, and the end part of the lock tongue (2) provided with the self-locking piece (21) is formed into an isosceles trapezoid which is matched with the avoidance hole (121).

4. The locking device according to claim 2, wherein the female buckle seat (1) is further provided with an automatic unlocking hole (13), and the automatic unlocking hole (13) and the self-locking block (21) are correspondingly arranged.

5. The locking device according to claim 2, wherein a plurality of clamping blocks (122) are arranged on two sides of the elastic piece (12), a plurality of clamping grooves (14) are arranged on two sides of the female buckle seat (1), the clamping blocks (122) and the clamping grooves (14) are correspondingly arranged, and the clamping blocks (122) are clamped and fixed in the clamping grooves (14).

6. The locking device according to claim 1, characterized in that the female buckle seat (1) is provided with a limit groove (15), the lock tongue (2) is provided with a limit block (23), and the limit block (23) is limited in the limit groove (15) when the lock tongue (2) rotates in the movable cavity.

7. The locking device according to claim 1, characterized in that the female socket (1) is provided with a guide plate (16) at the socket (11), the inner side of the guide plate (16) being provided with an arc-shaped guide surface for abutment with the end of the male socket (3) before the end of the male socket (3) is inserted into the socket (11).

8. The locking device according to claim 1, characterized in that the manual unlocking assembly (4) comprises: first pivot (41), handle (42) and first spacing piece (43), the one end of first pivot (41) with handle (42) are connected and both form L shape, the both ends of first pivot (41) follow the both sides of box-pin seat (1) stretch out, the both ends of first pivot (41) are provided with first annular, first spacing piece (43) joint in first annular and the butt in the lateral surface of box-pin seat (1), be provided with extrusion piece (411) on first pivot (41), handle (42) drive when first pivot (41) rotate, extrusion piece (411) butt in spring bolt (2) and drive spring bolt (2) rotate.

9. The locking device according to claim 8, wherein a second rotating shaft (5) and a second limiting piece (6) are arranged at the end part of the female buckle seat (1), two ends of the second rotating shaft (5) extend out from two sides of the female buckle seat (1), a second annular groove is arranged at two ends of the second rotating shaft (5), the first limiting piece (43) is clamped in the second annular groove and is abutted to the outer side surface of the female buckle seat (1), and a through hole for the second rotating shaft (5) to penetrate is arranged at the end part of the lock tongue (2).

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