CN108915396B

CN108915396B - Electromagnetic lock

Info

Publication number: CN108915396B
Application number: CN201810792094.9A
Authority: CN
Inventors: 王立孟
Original assignee: Wenzhou Tianjian Electric Co ltd
Current assignee: Wenzhou Tianjian Electric Co ltd
Priority date: 2018-07-18
Filing date: 2018-07-18
Publication date: 2020-04-07
Anticipated expiration: 2038-07-18
Also published as: CN108915396A

Abstract

The invention relates to the technical field of locksets, in particular to an electromagnetic lock, which comprises a lock hook and a lock catch assembly, wherein the lock catch assembly is provided with a locking position and an unlocking position, the locking position is clamped with a lock body after the lock hook is inserted into the lock body, and the unlocking position is used for enabling the lock hook to be separated from the lock body and to be popped out; the lever assembly comprises a lever body and a second elastic piece connected with the lever body, the lever body is provided with a first limiting end, the locking assembly is provided with a second limiting end, and the first limiting end of the lever body is clamped with the second limiting end when the locking assembly moves to the locking position and is separated from the second limiting end under the action of driving force; the driving mechanism is provided with a force application part and a driving assembly, wherein the force application part is matched with the inclined plane formed at the position, far away from the first limiting end, of the lever body, the driving assembly is used for providing driving force for the force application part, and the force application part is suitable for applying acting force to the inclined plane in the deformation direction of the second elastic part and in the moving direction of the force application part. The electromagnetic lock assembly is stable and has good safety performance.

Description

Electromagnetic lock

Technical Field

The invention relates to the technical field of locks, in particular to an electromagnetic lock.

Background

A vending machine is a machine that can automatically pay for money according to the money put in. The vending machine is a common commercial automation device, can save manpower and facilitate trading, and is a brand new commercial retail form, also called a micro supermarket with 24-hour business. In order to guarantee safety performance of an existing vending machine, an electromagnetic lock is usually used for locking between a cabinet body and a cabinet door.

The prior electromagnetic lock for the vending machine comprises a fixed seat, an electromagnet, a lock hook, a lock plate, a screw and a hook arranged on a cabinet door of the vending machine; the electromagnet is arranged in the groove of the fixed seat, and the lock hook and the lock plate are both rotationally arranged in the groove of the fixed groove; one end of the lock hook is provided with a hook groove, and the other end of the lock hook is provided with a threaded hole; the locking plate is provided with a U-shaped groove and a hook; the upper end of the electromagnet is provided with a working pin which can move up and down relative to the electromagnet, a spring is sleeved outside the working pin, the lower end of the spring is fixed on the upper end surface of the electromagnet, the upper end of the working pin is provided with a vertical plate, the vertical plate is provided with a through hole, and a screw penetrates through the through hole on the vertical plate and is connected in a threaded hole at the other end of the lock hook in a threaded manner; when the electromagnetic lock is locked, the hook of the locking plate hooks the hook groove of the locking hook, and the clamping hook is clamped at the U-shaped groove of the locking plate.

But foretell electromagnetic lock for vending machine stability is not strong when the lock state, and when the vending machine took place great shock, the spring took place to rock easily to drive the work pin and reciprocate, and then drive the screw motion, the locking hook was struggled away the locking plate, and the electromagnetic lock that makes originally be in lock state vibrates the in-process automatic unlocking, and the security is poor.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the technical defects that the electromagnetic lock in the prior art is unstable in a locking state, easy to automatically unlock and poor in safety, so that the electromagnetic lock with stable components and good safety performance is provided.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides an electromagnetic lock, including lock body and with lock body cooperation latch hook that uses, lock body is including the installation shell, be provided with in the installation shell:

the locking buckle assembly is provided with a locking position and an unlocking position, wherein the locking position is clamped with the lock body after the locking hook is inserted into the lock body, and the unlocking position enables the locking hook to be separated from the lock body and be ejected out under the action of driving force;

the lever assembly comprises a lever body and a second elastic piece connected with the lever body, the lever body is provided with a first limiting end, a second limiting end matched with the first limiting end is arranged on the locking assembly, the first limiting end of the lever body is clamped with the second limiting end when the locking assembly moves to a locking position and is separated from the second limiting end under the action of driving force so as to unlock the electromagnetic lock, and the second elastic piece is arranged at the other end of the lever body, which is far away from the first limiting end;

the driving mechanism is provided with a force application part and a driving assembly, wherein the force application part is far away from the lever body and is matched with the inclined plane formed at the first limiting end and provides driving force for the force application part, and under the action of the driving assembly, the force application part applies a first acting force and a second acting force to the inclined plane, the first acting force faces to the deformation direction of the second elastic part and is compressed, and the second acting force is along the movement direction of the force application part.

The force application direction of the force application piece is the direction that the lever body compresses the second elastic piece and rotates to the first limiting end to release the clamping with the second limiting end.

The driving assembly comprises an electromagnetic coil and an iron core column arranged inside the electromagnetic coil, the iron core column is connected with the force application part, and the force application part is driven by the iron core column to move along the direction perpendicular to the deformation direction of the second elastic part.

The second elastic piece is a pressure spring, the other end of the pressure spring is fixed on the mounting shell, and the compression deformation direction of the pressure spring is parallel to the insertion direction of the lock hook.

The one end shaping of iron core post has first arch, application of force piece orientation the one end shaping of iron core post have with the recess of first protruding adaptation, the iron core post with application of force piece passes through first arch with the cooperation detachably of recess is fixed.

The another side that has with the shaping of application of force piece the side is relative is provided with the second arch, the protruding extension of second installation shell sets up, the second arch is suitable for to drive under the exogenic action application of force piece is along perpendicular to the deformation direction motion of second elastic component.

The lock catch assembly comprises a lock catch body and a first elastic piece connected with the lock catch body, and a lock catch matched with the lock hook is arranged on the lock catch body.

The installation shell is internally provided with a first installation shaft and a second installation shaft, and the lock catch body and the lever body are respectively and rotatably arranged on the first installation shaft and the second installation shaft.

The lock body further comprises a microswitch close to the lock catch body, when the lock catch assembly is located at an unlocking position, the lock catch body is far away from a handle of the microswitch, so that the microswitch sends an unlocking signal, and when the lock catch assembly is located at a locking position, a handle of the microswitch is extruded by a convex block formed on the lock catch body, so that the unlocking signal of the microswitch is disconnected.

The first elastic piece is a torsion spring, two ends of the torsion spring are respectively connected with the lock catch body and the first mounting shaft, and therefore a rotating force which returns to an initial position after the lock catch body is unlocked is exerted on the lock catch body.

Compared with the prior art, the technical scheme of the invention has the following advantages:

1. the electromagnetic lock comprises a lock body and a lock hook matched with the lock body, wherein the lock body comprises an installation shell, and the installation shell is internally provided with: the locking buckle assembly is provided with a locking position and an unlocking position, wherein the locking position is clamped with the lock body after the locking hook is inserted into the lock body, and the unlocking position enables the locking hook to be separated from the lock body and be ejected out under the action of driving force; the lever assembly comprises a lever body and a second elastic piece connected with the lever body, the lever body is provided with a first limiting end, a second limiting end matched with the first limiting end is arranged on the locking assembly, the first limiting end of the lever body is clamped with the second limiting end when the locking assembly moves to a locking position and is separated from the second limiting end under the action of driving force so as to unlock the electromagnetic lock, and the second elastic piece is arranged at the other end of the lever body, which is far away from the first limiting end; the driving mechanism is provided with a force application part and a driving assembly, wherein the force application part is far away from the lever body and is matched with the inclined plane formed at the first limiting end and provides driving force for the force application part, and under the action of the driving assembly, the force application part applies a first acting force and a second acting force to the inclined plane, the first acting force faces to the deformation direction of the second elastic part and is compressed, and the second acting force is along the movement direction of the force application part. When the electromagnetic lock vibrates greatly, although the second elastic piece also generates a certain vibration trend along with the vibration of the electromagnetic lock, the lever body connected with the second elastic piece also generates a corresponding movement trend along with the second elastic piece, but the elastic force generated by the vibration trend of the second elastic piece is smaller, so that the elastic force applied to the lever body by the second elastic piece in the process of generating the vibration trend is smaller, and because the force applying piece simultaneously applies a horizontal acting force along the movement direction of the force applying piece and a vertical acting force towards the same deformation direction of the second elastic piece to the inclined plane on the lever body in unlocking, namely, the lever body can be unlocked only when the acting forces in the two directions are simultaneously applied to the lever body, but the second elastic piece can only generate a vertical downward elastic acting force in the vibration process and can not generate an acting force in the horizontal direction, therefore, when the second elastic part has the oscillation trend, the lever body is difficult to move, and the setting of the force application part also limits the movement trend of the lever body, so that the structure design ensures that when the electromagnetic lock generates large oscillation, the acting force provided by the second elastic part hardly drives the lever body to move, and further the first limit end is not separated from the second limit end, the phenomenon of automatic unlocking is difficult to generate when the unlocking is not needed, and the safety of the electromagnetic lock is improved.

2. In the electromagnetic lock of the present invention, the force application direction of the force application member is a direction in which the lever body compresses the second elastic member and rotates to the first position limiting end to release the engagement with the second position limiting end. The driving force can be applied to the force application part through the driving assembly by the structural design, the force application part can move, and then the driving force which overcomes the acting force of the second elastic part and overcomes the acting force of the second limiting end of the locking assembly is applied to the lever body in the moving process, so that the lever body rotates, the rotating lever body drives the first limiting end to be separated from the second limiting end, the locking hook is ejected out of the lock body by the locking assembly under the action of self restoring force, and the unlocking of the electromagnetic lock is completed.

3. According to the electromagnetic lock, the driving assembly comprises the electromagnetic coil and the iron core column arranged inside the electromagnetic coil, the iron core column is connected with the force application piece, and the force application piece moves along the deformation direction perpendicular to the second elastic piece under the driving of the iron core column. Due to the design, after a pulse signal is given to the equipment, the electromagnetic coil can drive the iron core column to move, so that the force application part is driven to move, and automatic intelligent unlocking is realized.

4. According to the electromagnetic lock, the other side face, opposite to the side face formed with the groove, of the force application piece is provided with the second bulge, the second bulge extends out of the installation shell, and the second bulge is suitable for driving the force application piece to move along the deformation direction perpendicular to the second elastic piece under the action of external force. Such structural design can make the life of electromagnetic lock reach no longer work or when equipment cuts off the power supply suddenly, and the electromagnetic lock is in the state of locking again, at this moment need to the electromagnetic lock unblock, opens the door, just can drive the application of force piece along the direction motion unanimous with the iron core post direction of motion after the circular telegram through pressing the second arch, and then drives the lever body rotation, makes the spacing end of first spacing end and second break away from, and the electromagnetic lock unblock, the door can be opened.

5. According to the electromagnetic lock, the lock catch assembly comprises a lock catch body and a first elastic piece connected with the lock catch body, and a lock catch matched with the lock hook is arranged on the lock catch body. The first elastic piece is designed to enable the lock catch body to pop out the lock hook under the action force of the first elastic piece after the second limiting end is separated from the first limiting end, and the lock catch body returns to the unlocking position.

6. According to the electromagnetic lock, the lock body further comprises a microswitch arranged close to the lock catch body, when the lock catch assembly is located at the unlocking position, the lock catch body is far away from the handle of the microswitch, so that the microswitch sends an unlocking signal, and when the lock catch assembly is located at the locking position, the lug formed on the lock catch body extrudes the handle of the microswitch, so that the microswitch unlocking signal is disconnected. The microswitch is designed to give a locking and unlocking signal to a user operating the electromagnetic lock, so that adverse effects caused by the fact that locking is not successful and unlocking is not successful are avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of an electromagnetic lock of the present invention with the upper or lower case removed in the unlocked state;

FIG. 2 is a schematic structural view of the electromagnetic lock shown in FIG. 1 with the upper or lower housing removed in the locked state;

FIG. 3 is a schematic diagram of a partial structure of the electromagnetic lock shown in FIG. 2 when the first position-limiting end is separated from the second position-limiting end;

FIG. 4 is a schematic view of the electromagnetic lock shown in FIG. 1 after installation of the mounting housing;

FIG. 5 is an exploded view of the electromagnetic lock shown in FIG. 4;

description of reference numerals:

1-a lock catch body; 2-a lever body; 3, pressing a spring; 4-a force application member; 5-core limb; 6-coil framework; 7-a first protrusion; 8-a microswitch; 9-a first wire; 10-a second wire; 11-a latch hook; 12-a second protrusion; 13-mounting the housing.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 5, an electromagnetic lock according to a specific embodiment of the present invention includes a lock body and a lock hook 11 cooperating with the lock body, where the lock body includes a mounting shell 13 and, disposed inside the mounting shell 13: the lock comprises a lock catch assembly, a lever assembly, a driving mechanism, a microswitch 8, a first lead 9 and a second lead 10, wherein a lock hole suitable for inserting the lock hook 11 is formed in the mounting shell 13, and the lock hook 11 completes locking and unlocking of the lock body by inserting and pulling out the lock hole.

In this embodiment, the latch assembly has a locking position where the latch hook 11 is engaged with the lock body after being inserted into the lock body, and an unlocking position where the latch hook 11 is separated from the lock body and ejected out by a driving force. The lock catch assembly comprises a lock catch body 1 and a first elastic piece connected with the lock catch body 1, a lock catch matched with the lock hook 11 is arranged on the lock catch body 1, and the lock catch is formed by a U-shaped groove formed in the lock catch body 1; the lock hook 11 is of a U-shaped structure, and the lock hook 11 is clamped with the U-shaped groove after an acting force is applied to the lock catch body 1 through an arc-shaped end of the U-shaped structure.

Further, be provided with first installation axle in the installation shell 13, hasp body 1 rotation sets up on the first installation axle. The first elastic member is a torsion spring having both ends connected to the latch body 1 and the first mounting shaft, respectively, to apply a rotational force to the latch body 1 to return to an initial position after the latch state is released, even if the latch body 1 returns to the latched position from the latched position.

In this embodiment, the lever assembly includes a lever body 2 and a second elastic member connected to the lever body 2, the lever body 2 has a first limit end, the locking assembly is provided with a second limit end adapted to the first limit end, the first limit end of the lever body 2 is engaged with the second limit end when the locking assembly moves to the locking position, and is separated from the second limit end under the action of a driving force so as to unlock the electromagnetic lock, the first limit end and the second limit end are triangular structures formed on the lever body 2 and the locking assembly, the second elastic member is disposed at the other end of the lever body 2 away from the first limit end, and the upper end of the second elastic member is connected to the lower end face of the lever body 2. A second installation shaft is arranged in the installation shell 13, the lever body 2 is rotatably arranged on the second installation shaft, and the first limiting end and the second elastic piece are respectively arranged on two sides of the second installation shaft. The second elastic piece is a pressure spring 3, the lower end of the pressure spring 3 is fixed on the mounting shell 13, and the compression deformation direction of the pressure spring 3 is parallel to the insertion direction of the lock hook 11.

In this embodiment, actuating mechanism, have with lever body 2 keeps away from the force application piece 4 of the fashioned inclined plane adaptation of first spacing end department and do force application piece 4 provides the drive assembly of drive power, force application piece 4 with the one end of inclined plane contact is the arcwall face, the not fragile inclined plane of design of arcwall face, the inclined plane with the pressure spring setting is in on the both sides that lever body 2 is relative under drive assembly's effect force application piece 4 is exerted for orientation on the inclined plane first effort and one edge of the deformation direction compression of second elastic component the second effort of force application piece 4. The force application direction of the force application member 4 is a direction in which the lever body 2 compresses the second elastic member and rotates to the first limit end to release the engagement with the second limit end.

The driving assembly comprises an electromagnetic coil and an iron core column 5 arranged in the electromagnetic coil, the iron core column 5 is connected with the force application part 4, and the force application part 4 is driven by the iron core column 5 to move along the direction perpendicular to the deformation direction of the second elastic part.

One end of the first lead 9 is connected to the electromagnetic coil, and the other end extends out of the mounting shell 13. The drive assembly further comprises a coil framework 6 and a framework seat used for supporting the coil framework 6, the electromagnetic coil is arranged on the coil framework 6, and the framework seat is arranged on the installation shell 13.

The one end shaping of iron core post 5 has first arch 7, application of force spare 4 orientation the one end shaping of iron core post 5 have with the recess of first arch 7 adaptation, iron core post 5 with application of force spare 4 passes through first arch 7 with the cooperation detachably of recess is fixed to synchronous motion.

The another side that has with the shaping of application of force piece 4 the side is relative is provided with the second arch 12, the protruding 12 extension of second installation shell 13 sets up, the protruding 12 of second is suitable for to drive under the exogenic action application of force piece 4 is along perpendicular to the deformation direction motion of second elastic component.

In this embodiment, micro-gap switch 8 is close to hasp body 1 sets up when the hasp subassembly is in the unblock position hasp body 1 is kept away from micro-gap switch 8's handle makes micro-gap switch 8 sends the unblock signal, and when the hasp subassembly is in the position of locking fashioned lug extrusion micro-gap switch 8's handle makes on the hasp body 1 micro-gap switch 8 unblock signal disconnection, the lug is the shaping is in triangle-shaped lug on the hasp body 1. One end of the second lead 10 is connected to the microswitch 8, and the other end extends out of the mounting shell 13.

In this embodiment, the mounting case 13 includes an upper case and a lower case adapted to the upper case, and the upper case and the lower case are detachably assembled into a case having an accommodating space.

The locking working process comprises the following steps:

when the latch hook 11 is inserted into the lock hole, the latch hook 11 pushes the latch body 1 to make the latch body 1 rotate clockwise under the action of the torsion spring, during the rotation of the latch body 1, the second limit end of the latch body 1 pushes the first limit end of the lever body 2 to move, the lever body 2 rotates clockwise under the driving of the first limit end, the compression spring 3 connected with the lever body 2 is compressed, meanwhile, under the larger acting force of the rotating lever body 2, the force application member 4 connected with the lever body 2 in a sliding way moves along the direction consistent with the moving direction of the electrified iron core column 5 until the second limit end moves to the locking position beyond the first limit end, the first limit end is clamped with the second limit end under the action of the compression spring 3, at this time, the latch hook 11 is clamped in the U-shaped groove of the latch body 1, and at the same time, the latch body 1 can touch the handle of the microswitch 8, at this time, the unlocking signal of the microswitch 8 is disconnected, indicating that the door is locked.

The unlocking working process comprises the following steps:

when the electromagnetic lock needs to be unlocked, the device can supply a pulse signal to energize the electromagnetic coil, the energized electromagnetic coil drives the iron core post 5 to horizontally move leftwards, the iron core post 5 drives the force application member 4 to move, the force application member 4 in motion interacts with the inclined plane formed on the lever body 2, so as to apply a clockwise rotating force to the lever body 2, the lever body 2 after rotating drives the first limit end to be separated from the block of the second limit end, so that the lock latch body 1 pops the lock latch 11 to return to the unlocking position under the torsional force of the torsional spring, then the lever body 2 rotates anticlockwise to reset under the acting force of the compressed pressure spring, the lever body 2 applies a horizontal acting force and a vertical upward acting force to the force application member in the resetting process to drive the force application member 4 to return to the initial position on the right side of the installation shell 13, meanwhile, the lock catch body 1 does not extrude the handle of the microswitch 8 after returning to the unlocking position, and the microswitch 8 sends an unlocking signal to indicate that the door is opened.

As an alternative embodiment, the first elastic member may also be a tension spring, a compression spring or other elastic members.

As an alternative embodiment, the first position-limiting end and the second position-limiting end may also be square or have other shapes.

As an alternative embodiment, the end of the force applying member 4 contacting the inclined surface may also be square or have other shapes.

As an alternative embodiment, the movement direction of the force application member 4 and the deformation direction of the second elastic member may also be set at an acute angle or an obtuse angle, as long as the acting force applied to the lever body 2 by the force application member 4 includes not only the acting force along the deformation direction of the second elastic member, but also the component force in other directions.

As an alternative embodiment, the projection may also be curved or otherwise shaped.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The electromagnetic lock is characterized by comprising a lock body and a lock hook (11) matched with the lock body for use, wherein the lock body comprises an installation shell (13), and the installation shell (13) is internally provided with:

the locking buckle assembly is provided with a locking position and an unlocking position, wherein the locking position is clamped with the lock body after the locking hook (11) is inserted into the lock body, and the unlocking position enables the locking hook (11) to be separated from the lock body and be ejected out under the action of driving force;

the lever assembly comprises a lever body (2) and a second elastic piece connected with the lever body (2), the lever body (2) is provided with a first limiting end, a second limiting end matched with the first limiting end is arranged on the locking assembly, the first limiting end of the lever body (2) is clamped with the second limiting end when the locking assembly moves to a locking position and is separated from the second limiting end under the action of driving force so as to unlock the electromagnetic lock, and the second elastic piece is arranged at the other end, far away from the first limiting end, of the lever body (2);

actuating mechanism, have with lever body (2) are kept away from force application piece (4) of the fashioned inclined plane adaptation of first spacing end department and do force application piece (4) provide the drive assembly of drive power under drive assembly's effect force application piece (4) apply for on the inclined plane orientation the compression of the deformation direction of second elastic component first effort and one are followed the second effort of the direction of motion of force application piece (4).

2. The electromagnetic lock according to claim 1, wherein the urging direction of the urging member (4) is such that the lever body (2) compresses the second elastic member and rotates to a direction in which the first stopper end is disengaged from the second stopper end.

3. The electromagnetic lock according to claim 2, wherein the driving assembly comprises an electromagnetic coil and a core post (5) disposed inside the electromagnetic coil, the core post (5) is connected to the force applying member (4), and the force applying member (4) is driven by the core post (5) to move along a direction perpendicular to the deformation direction of the second elastic member.

4. The electromagnetic lock according to claim 3, characterized in that the second elastic element is a compression spring (3), the other end of the compression spring (3) is fixed on the mounting shell (13), and the compression deformation direction of the compression spring (3) is parallel to the insertion direction of the locking hook (11).

5. An electromagnetic lock according to claim 3, characterized in that one end of the core limb (5) is formed with a first protrusion (7), and the force applying member (4) is formed with a recess adapted to the first protrusion (7) towards the end of the core limb (5), and the core limb (5) and the force applying member (4) are detachably fixed by the cooperation of the first protrusion (7) and the recess.

6. The electromagnetic lock according to claim 5, characterized in that another side surface of the force application member (4) opposite to the side surface formed with the groove is provided with a second protrusion (12), the second protrusion (12) extends out of the installation shell (13) and is arranged, and the second protrusion (12) is suitable for driving the force application member (4) to move along a deformation direction perpendicular to the second elastic member under the action of external force.

7. The electromagnetic lock according to claim 1, characterized in that the latch assembly comprises a latch body (1) and a first elastic member connected with the latch body (1), and a latch adapted to the latch hook (11) is disposed on the latch body (1).

8. An electromagnetic lock according to claim 7, characterized in that a first mounting shaft and a second mounting shaft are provided in the mounting housing (13), on which the lock catch body (1) and the lever body (2) are rotatably provided, respectively.

9. The electromagnetic lock according to claim 7, characterized in that the lock body further comprises a microswitch (8) arranged close to the shackle body (1), when the shackle assembly is in the unlocking position, the handle of the microswitch (8) is kept away from the shackle body (1) to enable the microswitch (8) to send an unlocking signal, and when the shackle assembly is in the locking position, a bump formed on the shackle body (1) presses the handle of the microswitch (8) to enable the microswitch (8) to turn off the unlocking signal.

10. The electromagnetic lock according to claim 8, wherein the first elastic member is a torsion spring having both ends connected to the locker body (1) and the first mounting shaft, respectively, to apply a rotational force to the locker body (1) to return to an initial position after releasing the locked state.