CN215332075U - Locking device and lock assembly - Google Patents

Abstract

The utility model provides a locking device and a lock assembly. Wherein, the locking device includes: the lock shell is provided with a first locking hole; a plug-in part; the lock body component comprises a locking piece which stretches into and is movably arranged in the insertion part, a second locking hole is formed in the lock body component, the lock body component is provided with a locking position and an unlocking position, when the lock body component is located at the locking position, the locking piece stretches out of the insertion part and stretches into the side wall of the interface to be locked so as to lock the insertion part on the interface to be locked, meanwhile, the second locking hole is aligned with the first locking hole, and an external lock is arranged in the first locking hole and the second locking hole in a penetrating mode so as to lock the lock body component at the locking position; when the lock body component is located at the unlocking position, the locking piece retracts into the insertion part, the insertion part can be pulled out of the interface to be locked, and meanwhile, the second locking hole is staggered with the first locking hole. The utility model solves the problem that the USB interface in the prior art is easily inserted or connected by mistake by personnel.

Description

Locking device and lock assembly

Technical Field

The utility model relates to the technical field of locks, in particular to a locking device and a lock assembly.

Background

In industries such as electric power and petrochemical industry, USB interfaces of switches, hosts and the like are mostly not locked, so that the phenomenon of personnel misplugging or misconnection is caused. In order to prevent misplug, theft or poisoning, a device for locking the USB interface is needed for management.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a locking device and a lockset component so as to solve the problem that a USB interface in the prior art is easily inserted or connected by mistake by personnel.

In order to achieve the above object, according to one aspect of the present invention, there is provided a latch device including: the lock shell is provided with a first locking hole; the plug-in part is fixedly connected with the lock shell and can be inserted into the interface to be locked; the lock body assembly is axially and movably arranged between the lock shell and the inserting part and comprises a locking piece, the locking piece extends into and is movably arranged in the inserting part, a second locking hole is formed in the lock body assembly, the lock body assembly is provided with a locking position and an unlocking position, when the lock body assembly is located at the locking position, the locking piece extends out of the side wall of the inserting part and extends into the side wall of the interface to be locked so as to lock the inserting part on the interface to be locked, meanwhile, the second locking hole is aligned with the first locking hole, and an external lockset penetrates through the first locking hole and the second locking hole so as to lock the lock body assembly at the locking position; when the lock body component is located at the unlocking position, the locking piece retracts into the insertion part, the insertion part can be pulled out of the interface to be locked, and meanwhile, the second locking hole is staggered with the first locking hole.

Further, the lock body subassembly includes: the lock body part is axially and movably arranged in the lock shell, and the second locking hole is formed in the lock body part; the extension portion, the extension portion is connected with lock body portion, and the two synchronous motion, the extension portion stretches into to grafting portion in, locking piece and extension portion swing joint have the guide post on the extension portion, and the guide way has been seted up to the locking piece, and the guide post stretches into to the guide way in, and when extension portion axial motion, the guide post extrudees the lateral wall of guide way to drive the locking piece and move between the position of stretching out grafting portion and withdrawal grafting portion.

Further, the guide slot is inclined with respect to the axial direction of the lock body assembly, and in the direction of insertion of the locking device into the interface to be locked, the guide slot is inclined in a direction away from the central axis of the lock body assembly.

Furthermore, the side wall of the insertion part is provided with a yielding hole, the insertion part is inserted into the groove of the inner side wall of the interface to be locked to be in butt joint communication with the groove, the locking piece is provided with a clamping part, and the clamping part can stretch out the yielding hole and stretch into the groove so as to lock the locking device at the interface to be locked.

Further, locking device still includes that the lock body resets, and the lock body resets the both ends of piece respectively with lock shell and lock body subassembly butt to provide the power that resets that moves to the shutting position for the lock body subassembly.

Furthermore, the lock body assembly is provided with an operation end capable of extending out of the lock shell, when the lock body assembly is located at the locking position, the operation end extends out of the lock shell, and the operation end enables the lock body assembly to move to the unlocking position under the action of external force.

Furthermore, the locking pieces are multiple, at least one locking piece is arranged on two opposite sides of the insertion part respectively, and the locking pieces extend out of or retract into the insertion part simultaneously.

Furthermore, a lock body limiting groove is formed in the lock shell, the lock body assembly is provided with a limiting bulge, and the limiting bulge extends into the lock body limiting groove and slides in the lock body limiting groove to control the motion range of the lock body assembly.

Furthermore, a clamping groove is formed in the side face of the inserting portion, the clamping groove is matched with the elastic arm of the side wall of the interface to be locked, and when the inserting portion is inserted into the interface to be locked, the elastic arm stretches into the clamping groove to limit the inserting portion.

According to another aspect of the present invention, there is provided a lock assembly including at least one locking device and an external lock, wherein the external lock can be inserted into at least one locking device and can lock at least one locking device.

By applying the technical scheme of the utility model, the insertion part is arranged, the insertion part can be inserted into the interface to be locked on equipment such as a host, a switch and the like, then the lock body component is matched with the insertion part, the locking piece of the lock body component can extend into the side wall of the interface to be locked through the insertion part, so that the insertion part is locked on the interface to be locked, the locking device cannot be pulled out, the interface to be locked is locked, at the moment, the second locking hole of the lock body component is aligned with the first locking hole on the lock shell, the external lockset can penetrate through the first locking hole and the second locking hole, the position of the lock body component is locked, and the locking piece of the lock body component is kept at the position extending out of the insertion part. When needs unblock blocking device, unblock outside tool to lock earlier, take off outside tool to lock from blocking device, outside tool to lock no longer locks the lock body subassembly, the lock body subassembly can move to the unblock position under the effect of other parts or external force, and the locking piece retracts grafting portion, and grafting portion can be followed and is waited to lock the interface and pull out, realizes the unblock. When the lock is locked again, the insertion part is inserted into the interface to be locked again, then the locking piece stretches out of the insertion part again, the external lockset is hung on the locking device, and the lock body assembly is locked at the locking position again. Above-mentioned setting mode makes locking device be applicable to the USB interface on equipment such as locking host computer, guarantees the security of USB interface, prevents to miss maloperation such as inserting to locking device easy operation presses the lock body subassembly after unblanking and can unblock, presses the lock body subassembly during the shutting and inserts grafting portion to waiting to lock the interface and can block.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 shows an exploded view of the lockout device of the present invention;

FIG. 2 shows a schematic view of the locking device of FIG. 1 in the locked state;

FIG. 3 shows a cross-sectional view of FIG. 2;

FIG. 4 shows a schematic view of the latch of FIG. 1 in an unlatched configuration;

FIG. 5 shows a cross-sectional view of FIG. 4;

FIG. 6 is a schematic view of the latch of FIG. 1 engaged with a padlock;

FIG. 7 shows a cross-sectional view of FIG. 6;

fig. 8 shows a schematic view of the latching device of fig. 1 in a configuration for latching engagement with a cable.

Wherein the figures include the following reference numerals:

10. a lock case; 11. a first latching aperture; 12. a lock body limiting groove; 20. a plug-in part; 21. a hole of abdication; 22. a card slot; 30. a lock body assembly; 31. a locking piece; 311. a guide groove; 312. a clamping part; 32. a second latching aperture; 33. a lock body portion; 34. a protruding portion; 341. a guide post; 35. a limiting bulge; 40. a lock body reset member; 50. an interface to be locked; 51. a groove; 52. a resilient arm; 60. an exterior lock.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.

In order to solve the problem that a USB interface in the prior art is easily inserted or connected by mistake by personnel, the utility model provides a locking device and a lockset component.

A latch device as shown in fig. 1 to 8, comprising: the lock shell 10 is provided with a first locking hole 11; the plug part 20, the plug part 20 is fixedly connected with the lock shell 10 and can be inserted into the interface 50 to be locked; the lock body assembly 30 is axially and movably arranged between the lock shell 10 and the insertion part 20, the lock body assembly 30 comprises a locking piece 31, the locking piece 31 extends into and is movably arranged in the insertion part 20, a second locking hole 32 is formed in the lock body assembly 30, the lock body assembly 30 has a locking position and an unlocking position, when the lock body assembly 30 is located at the locking position, the locking piece 31 extends out of the side wall of the insertion part 20 and extends into the side wall of the interface 50 to be locked so as to lock the insertion part 20 on the interface 50 to be locked, meanwhile, the second locking hole 32 is aligned with the first locking hole 11, the external lock 60 penetrates through the first locking hole 11 and the second locking hole 32 so as to lock the lock body assembly 30 at the locking position; when the lock body assembly 30 is located at the unlocking position, the locking piece 31 is retracted into the insertion part 20, and the insertion part 20 can be pulled out from the interface 50 to be locked while the second locking hole 32 is misaligned with the first locking hole 11.

In the embodiment, by providing the insertion part 20, the insertion part 20 can be inserted into the interface 50 to be locked on a host, an exchange, or other device, and then the lock body assembly 30 is engaged with the insertion part 20, and the locking piece 31 of the lock body assembly 30 can extend from the insertion part 20 to the sidewall of the interface 50 to be locked, so that the insertion part 20 is locked on the interface 50 to be locked, that is, the locking device is locked on the interface 50 to be locked, so that the locking device cannot be pulled out to lock the interface 50 to be locked, at this time, the second locking hole 32 of the lock body assembly 30 is aligned with the first locking hole 11 on the lock case 10, and the external lock 60 can be inserted into the first locking hole 11 and the second locking hole 32, so as to lock the position of the lock body assembly 30, and keep the locking piece 31 of the lock body assembly 30 at the position extending out of the insertion part 20. When the locking device needs to be unlocked, the external lock 60 is firstly unlocked, the external lock 60 is taken down from the locking device, the external lock 60 does not lock the lock body assembly 30 any more, the lock body assembly 30 can move to the unlocking position under the action of other parts or external force, the locking piece 31 retracts into the insertion part 20, and the insertion part 20 can be pulled out from the interface 50 to be locked, so that unlocking is realized. When the lock is re-locked, the plug part 20 is re-inserted into the interface 50 to be locked, then the locking piece 31 is extended out of the plug part 20 again, the external lock 60 is hung on the locking device, and the lock body assembly 30 is re-locked at the locking position. The locking device is suitable for locking the USB interfaces on equipment such as a host computer, the safety of the USB interfaces is guaranteed, misoperation such as error insertion is prevented, the locking device is simple to operate, the lock body assembly 30 can be unlocked by pressing after unlocking, and the lock body assembly 30 is pressed during locking to insert the insertion part 20 into the interface 50 to be locked.

It should be noted that the locking device of the present embodiment is mainly directed to interfaces of various devices, and the present embodiment is described by taking the to-be-locked interface 50 as a USB interface, as shown in fig. 6, and accordingly, the main body shape of the plug part 20 is adapted to the USB interface. Of course, the locking device may also be applied to other device interfaces, and the shape of the insertion part 20 is only required to be matched with other device interfaces.

As shown in fig. 1 to 5, the lock body assembly 30 includes a lock body portion 33 and a protruding portion 34, the lock body portion 33 is axially movably disposed in the lock case 10, and the second locking hole 32 is formed on the lock body portion 33; the protruding part 34 and the lock body part 33 are integrally connected together and move synchronously, the protruding part 34 extends into the insertion part 20, and the locking piece 31 is also positioned in the insertion part 20 and movably connected with the protruding part 34. Specifically, the protruding portion 34 is provided with a guiding post 341, the locking piece 31 is provided with a guiding slot 311, the guiding post 341 extends into the guiding slot 311 and moves in the guiding slot 311, so that when the lock body assembly 30 moves to the locking position, the protruding portion 34 moves axially in the direction away from the insertion portion 20, and the guiding post 341 presses the side wall of the guiding slot 311, thereby driving the locking piece 31 to extend out of the insertion portion 20 and extend into the side wall of the interface 50 to be locked, so as to achieve the locking effect; when the lock body assembly 30 moves to the unlocking position, the extension part 34 moves in the direction of extending into the insertion part 20, and the guide column 341 presses the side wall of the guide slot 311, so as to drive the locking piece 31 to retract into the insertion part 20, thereby realizing unlocking. Of course, the lock body portion 33 and the projecting portion 34 may be provided separately from each other, instead of being provided integrally as described above.

As shown in fig. 3 and 5, the guiding slot 311 of the present embodiment is formed obliquely with respect to the axial direction of the lock body assembly 30, and the guiding slot 311 is inclined in a direction away from the central axis of the lock body assembly 30 in the direction in which the locking device is inserted into the interface 50 to be locked. Thus, when the extension portion 34 moves axially away from the insertion portion 20, the guiding column 341 can press and drive the locking piece 31 to extend out of the insertion portion 20, and when the extension portion 34 moves axially into the insertion portion 20, the guiding column 341 can press and drive the locking piece 31 to retract into the insertion portion 20.

Preferably, as shown in fig. 1, 2 and 4, the sidewall of the inserting part 20 of the present embodiment is provided with an avoiding hole 21 for extending and retracting the locking piece 31, the avoiding hole 21 is matched with the groove 51 on the inner sidewall of the interface 50 to be locked, and the locking piece 31 has a locking part 312. Specifically, when the inserting portion 20 is inserted into the interface 50 to be locked, the yielding hole 21 is in butt joint communication with the groove 51 on the inner side wall of the interface 50 to be locked, at this time, the clamping portion 312 can extend out of the yielding hole 21 and extend into the groove 51, so that the inserting portion 20 is locked at the interface 50 to be locked, and the effect of locking the locking device at the interface 50 to be locked is achieved. Further preferably, the receding hole 21 is opened on a short-side wall surface of the inserting part 20, and the receding holes 21 are opened on two opposite short-side wall surfaces, so as to engage with the two locking pieces 31. Of course, the specific arrangement mode and the arrangement position of the locking piece 31, the abdicating hole 21 and other components can be changed correspondingly according to the requirement.

In this embodiment, the locking device further includes a lock body resetting member 40, the lock body resetting member 40 is a spring, one end of the spring abuts against the lock body portion 33 of the lock body assembly 30, the other end of the spring abuts against the lock housing 10, and the lock body resetting member 40 provides a resetting force for the lock body assembly 30 to move to the locking position, so that the lock body assembly 30 is always in the locking position without being subjected to an external force. Accordingly, the lock body 33 of the present embodiment may extend out of the lock case 10 at an end thereof away from the extension 34, which serves as an operation end, and an operator may press the operation end to change the position of the lock body assembly 30. Specifically, during unlocking, after the external lock 60 unlocks the lock body assembly 30, the lock body assembly 30 is still in the locking position under the action of the lock body resetting member 40, at this time, the insertion part 20 still cannot be pulled out, and the operating end at this time extends out of the lock case 10 for a certain distance, and an operator manually presses the operating end, so that the lock body assembly 30 moves to the unlocking position, the locking piece 31 retracts into the insertion part 20, and the locking device can be pulled out; when the lock is locked again, when the operator reinserts the insertion portion 20 into the to-be-locked interface 50, the lock body assembly 30 needs to be pressed, so that the lock body assembly 30 is kept at the unlocking position, the blocking portion 312 does not obstruct the movement of the insertion portion 20 inserted into the to-be-locked interface 50, the insertion portion 20 can be inserted into the to-be-locked interface 50, then the operator releases the lock body assembly 30, the lock body assembly 30 moves to the locking position under the driving of the lock body resetting member 40, and therefore the lock is automatically locked, and the external lock 60 can be locked by being hung on the locking device. Of course, the above operation mode can be adjusted according to different specific structures, for example, the locking portion 312 can be provided with a guiding inclined plane, the interface 50 to be locked can be pressed to press the guiding inclined plane, so that the locking portion 312 temporarily retracts into the plug portion 20, and the plug portion 20 can be inserted into the interface 50 to be locked, so that the lock body assembly 30 does not need to be pressed all the time when the lock body is locked again.

Alternatively, the locking piece 31 is provided in plurality, and at least one locking piece 31 is provided on each of two opposite sides of the insertion part 20, and each locking piece 31 extends or retracts from the insertion part 20 at the same time. The locking pieces 31 of the present embodiment are provided with two locking pieces respectively located at two opposite sides of the inserting portion 20, and correspondingly, the two guide posts 341 and the two guide grooves 311 are also provided with two, and along the direction of inserting the locking device into the interface 50 to be locked, the two guide grooves 311 are inclined to the direction away from each other, so as to respectively and correspondingly cooperate with the two locking pieces 31, so that the two sides of the inserting portion 20 are stressed in balance, and the locking effect is ensured at the same time.

Optionally, the lock case 10 is provided with a lock body limiting groove 12, the lock body limiting groove 12 is formed along the axial direction of the lock case 10, that is, the sliding direction of the lock body assembly 30 is formed, the outer surface of the lock body portion 33 of the lock body assembly 30 is provided with a hook-shaped limiting protrusion 35, the limiting protrusion 35 extends into the lock body limiting groove 12, when the lock body assembly 30 slides axially, the limiting protrusion 35 can slide in the lock body limiting groove 12, so as to control the movement range of the lock body assembly 30, and avoid the situation that the lock body assembly 30 moves over position.

In this embodiment, the side wall of the long side of the insertion part 20 is provided with a locking slot 22, and the locking slot 22 is engaged with the elastic arm 52 of the side wall of the to-be-locked interface 50. Specifically, when the inserting portion 20 is inserted into the to-be-locked interface 50, the elastic arm 52 on the side surface of the to-be-locked interface 50 extends into the clamping groove 22, so that the inserting portion 20 is limited, and preliminary fixation is realized.

As shown in fig. 2 to 5, the unlocking process of the locking device of the present embodiment is as follows:

the operator inserts the key to unlock the outer lock 60 and moves the locking bar or hook of the outer lock 60 out from between the first locking hole 11 and the second locking hole 32, removes the outer lock 60 from the locking device, and the outer lock 60 is no longer stopped between the lock body portion 33 and the lock case 10, so that the lock body assembly 30 can be freely switched between the locked position and the unlocked position.

Then, the operator presses the operation end of the lock body assembly 30, so that the lock body assembly 30 moves towards the inside of the lock housing 10, and as the lock body assembly 30 moves inwards, the extension part 34 is also moved inwards, the guide column 341 moves in the guide slot 311, thereby pressing the locking piece 31 to make the clamping part 312 completely retract into the inside of the plug-in part 20 and disengage from the groove 51 of the USB interface, and the plug-in part 20 can move out of the USB interface, thereby releasing the locking of the USB interface, and operating the USB interface.

When the operator removes the locking device from the USB interface, the operator releases the operation end, so that the lock body assembly 30 moves toward the outside of the lock case 10 under the elastic force of the lock body resetting member 40, and the lock body assembly 30 moves outward, which drives the extension portion 34 to move outward, and the guide post 341 moves in the guide slot 311, thereby pressing the locking piece 31 to move, so that the locking portion 312 extends to the outside of the inserting portion 20. At this time, each component of the locking device is restored to the initial state, and the whole unlocking process is completed.

The locking operation sequence of the locking device is opposite to the unlocking operation sequence, the principle is basically the same, and the description is omitted.

The embodiment also provides a lock assembly, which comprises the above locking device and an external lock 60, wherein the locking device is at least one, and the external lock 60 can be arranged on the at least one locking device in a penetrating way and locks the at least one locking device. The first locking hole 11 and the second locking hole 32 of the locking device of this embodiment have substantially the same diameter, and the external lock 60 is a padlock or a cable lock, and the diameter of the locking rod or the locking hook is slightly smaller than the diameter of the first locking hole 11 or the second locking hole 32. The locking device of this embodiment can be configured accordingly according to the number of interfaces to be locked, and the external lock 60 can lock a plurality of locking devices at the same time, for example, as shown in fig. 6 and 7, when a single USB interface is locked by a locking device, a padlock or a cable lock can be used to lock one locking device. As shown in fig. 8, when a plurality of USB interfaces are locked by a plurality of locking devices, the cable lock is used for locking because the locking hook of the cable lock is made of a soft material and can pass through a plurality of first locking holes 11 and second locking holes 32 of the plurality of locking devices, thereby achieving the effect that a single cable lock can lock a plurality of locking devices. In particular, a long shackle padlock may also be used for locking when the first locking hole 11 and the second locking hole 32 of the plurality of locking devices are axially aligned.

Optionally, external lock 60 may be a lock with identification information such as a wireless code chip, and effective control over the locking device and the USB interface is achieved through supervision of external lock 60.

It should be noted that, a plurality in the above embodiments means at least two.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. the problem that the USB interface in the prior art is easily plugged or connected by a person by mistake is solved;

2. the locking device is suitable for locking the USB interfaces on equipment such as a host computer and the like, so that the safety of the USB interfaces is ensured, and misoperation such as misplug is prevented;

3. the locking device is simple to operate, the lock body component can be unlocked by pressing after unlocking, and the lock body component is pressed during locking, so that the insertion part is inserted into the interface to be locked and can be locked;

4. the locking device is flexible in use and configuration, can realize single locking, and can also realize simultaneous locking of a plurality of USB interfaces at different positions or in a compact mode;

5. the locking device can be matched with a lockset with identity identification information for use, and the USB interface of equipment such as a management computer and the like is unlocked.

It is to be understood that the above-described embodiments are only a few, 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.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A lockout device, comprising:

the lock shell (10) is provided with a first locking hole (11);

the plug-in part (20), the plug-in part (20) is fixedly connected with the lock shell (10) and can be inserted into an interface (50) to be locked;

the lock body component (30) is axially and movably arranged between the lock shell (10) and the insertion part (20), the lock body component (30) comprises a locking piece (31), the locking piece (31) extends into and is movably arranged in the insertion part (20), a second locking hole (32) is formed in the lock body component (30), the lock body component (30) has a locking position and an unlocking position, when the lock body component (30) is located at the locking position, the locking piece (31) extends out of the side wall of the insertion part (20) and extends into the side wall of the interface (50) to be locked so as to lock the insertion part (20) on the interface (50) to be locked, meanwhile, the second locking hole (32) is aligned with the first locking hole (11), and an external lock (60) penetrates through the first locking hole (11) and the second locking hole (32), to lock the lock body assembly (30) in the locked position; when the lock body component (30) is located at the unlocking position, the locking piece (31) retracts into the insertion part (20), the insertion part (20) can be pulled out of the interface (50) to be locked, and meanwhile, the second locking hole (32) is dislocated with the first locking hole (11).

2. The lockout device of claim 1, wherein the lock body assembly (30) comprises:

the lock body part (33) is axially movably arranged in the lock shell (10), and the second locking hole (32) is formed in the lock body part (33);

the locking mechanism comprises a protruding portion (34), the protruding portion (34) is connected with the locking body portion (33) and moves synchronously with the locking body portion and the locking body portion, the protruding portion (34) extends into the insertion portion (20), the locking piece (31) is movably connected with the protruding portion (34), a guide column (341) is arranged on the protruding portion (34), a guide groove (311) is formed in the locking piece (31), the guide column (341) extends into the guide groove (311), when the protruding portion (34) moves axially, the guide column (341) extrudes the side wall of the guide groove (311) and drives the locking piece (31) to move between positions of extending out the insertion portion (20) and retracting the insertion portion (20).

3. A locking device according to claim 2, characterized in that the guide slot (311) is obliquely opened in relation to the axial direction of the lock body assembly (30), and in the direction of insertion of the locking device into the interface (50) to be locked, the guide slot (311) is obliquely inclined in a direction away from the central axis of the lock body assembly (30).

4. The locking device according to claim 2, wherein a yielding hole (21) is formed in a side wall of the insertion portion (20), when the insertion portion (20) is inserted into the interface (50) to be locked, the yielding hole (21) is in butt communication with a groove (51) in the inner side wall of the interface (50) to be locked, the locking piece (31) is provided with a clamping portion (312), and the clamping portion (312) can extend out of the yielding hole (21) and extend into the groove (51) to lock the locking device at the interface (50) to be locked.

5. A locking arrangement according to claim 1 further comprising a lock body reset member (40), both ends of the lock body reset member (40) abutting the lock housing (10) and the lock body assembly (30), respectively, and providing a reset force for the lock body assembly (30) to move to the locked position.

6. A locking arrangement according to claim 1 wherein the lock body assembly (30) has an operative end which is extendable out of the housing (10), the operative end extending out of the housing (10) when the lock body assembly (30) is in the locked position, the operative end being operable to move the lock body assembly (30) to the unlocked position under an external force.

7. A locking device according to claim 1, wherein the locking piece (31) is plural, and at least one locking piece (31) is provided on each of opposite sides of the insertion part (20), and each locking piece (31) extends or retracts the insertion part (20) at the same time.

8. A locking device according to claim 1, wherein the lock housing (10) defines a lock body limiting groove (12), and the lock body assembly (30) has a limiting protrusion (35), and the limiting protrusion (35) extends into the lock body limiting groove (12) and slides in the lock body limiting groove (12) to control the movement range of the lock body assembly (30).

9. The locking device according to claim 1, wherein a locking groove (22) is formed in a side surface of the insertion portion (20), the locking groove (22) is matched with an elastic arm (52) on a side wall of the interface (50) to be locked, and when the insertion portion (20) is inserted into the interface (50) to be locked, the elastic arm (52) extends into the locking groove (22) to limit the insertion portion (20).

10. A lock assembly, characterized by comprising a locking device according to any one of claims 1 to 9 and an external lock (60), said locking device being at least one, said external lock (60) being able to be threaded onto at least one of said locking devices and to lock at least one of said locking devices.

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