CN109723703B

CN109723703B - Locking device

Info

Publication number: CN109723703B
Application number: CN201910020418.1A
Authority: CN
Inventors: 陈怡�; 唐其伟
Original assignee: Hitachi Building Technology Guangzhou Co Ltd
Current assignee: Hitachi Building Technology Guangzhou Co Ltd
Priority date: 2019-01-09
Filing date: 2019-01-09
Publication date: 2021-03-09
Anticipated expiration: 2039-01-09
Also published as: CN109723703A

Abstract

The invention discloses a locking device, which comprises a main body, a sliding block and a locking assembly, wherein a locking groove for accommodating a switch shifting block is concavely arranged on an abutting plane of the main body, the locking groove is provided with a first groove wall and a second groove wall which are oppositely arranged, a guide hole is formed in the second groove wall, the mounting groove in the main body is communicated with the locking groove through the guide hole, the sliding block is slidably arranged in the guide hole, the sliding block is provided with a locking position and an unlocking position, when the sliding block moves to the locking position, one end of the sliding block extending into the locking groove can abut against the switch shifting block on the first groove wall, when the sliding block moves to the unlocking position, the sliding block is separated from the switch shifting block, the locking assembly is connected with the sliding block. Through setting up slider and locking Assembly, remove the slider and can support the switch shifting block tight, and operation locking Assembly can lock the slider in locking position, prevents that the slider from removing, and then guarantees that the switch shifting block is locked at locking device's locking inslot, effectively prevents that the switch shifting block from being stirred at will, promotes the security.

Description

Locking device

Technical Field

The invention relates to the technical field of switch equipment, in particular to a locking device.

Background

At present, in the maintenance process of equipment such as an elevator, a maintainer needs to disconnect a working circuit in advance, and a shifting block of a main switch of the working circuit is shifted to an open position (the main switch is provided with an open position and a closed position) during operation, so that a safe and reliable working environment is provided for the maintainer. However, if the main switch is lack of a warning mark or a locking device, once other workers close the circuit unknowingly, danger or even casualties are likely to be generated, and great potential safety hazards exist.

At present, the warning structures arranged at the main switch mainly comprise the following two types: the first method is to arrange a signboard, wherein a nylon rope is adopted to hang the signboard on a main switch, or an insulating adhesive tape is used to temporarily fix the signboard, so as to prompt other workers to maintain the signboard and avoid switching on the main switch; the second is to provide a locking device, most of the existing locking devices lock the shifting block of the main switch on the locking device by means of locking screws, and the screws need to be screwed by using tools during operation.

The existing warning structure has the following defects: 1. the suspended or adhered signboard is easy to fall off, and when the signboard is suspended or adhered, the signboard is easy to touch with point parts such as wiring, screws and the like, so that the electric shock danger exists; 2. the operation of screwing the screw is complicated, and the shifting block of the main switch is not convenient to be quickly locked and unlocked.

Disclosure of Invention

An object of the present invention is to provide a lock device which is simple in structure, stable in locking, and high in safety.

Another object of the present invention is to provide a locking device which is easy to lock and unlock.

To achieve the purpose, the embodiment of the invention adopts the following technical scheme:

there is provided a lock device including:

the switch comprises a main body, a switch shifting block and a switch control device, wherein the main body is provided with an abutting plane, a locking groove for accommodating the switch shifting block is concavely arranged on the abutting plane, the locking groove is provided with a first groove wall and a second groove wall which are oppositely arranged, a guide hole is formed in the second groove wall, a mounting groove is arranged in the main body, and the mounting groove is communicated with the locking groove through the guide hole;

the sliding block is arranged in the guide hole in a sliding mode and provided with a locking position and an unlocking position, when the sliding block moves to the locking position, one end, extending into the locking groove, of the sliding block can enable the switch shifting block to be abutted against the first groove wall, and when the sliding block moves to the unlocking position, the sliding block is separated from the switch shifting block;

and the locking assembly is connected with the sliding block and can lock the sliding block at the locking position.

As a preferable scheme of the locking device, a first elastic member is arranged in the mounting groove, the first elastic member is respectively connected with the sliding block and the mounting groove, and the sliding block always has a movement tendency toward the unlocking position under the driving of the first elastic member.

As a preferable scheme of the locking device, a strip-shaped mounting hole is formed in the slider, the length of the mounting hole extends along the moving direction of the slider, a first fixing portion is arranged on the hole wall of the mounting hole, a second fixing portion is arranged in the mounting hole, the first elastic member is a spring, one end of the spring is connected with the first fixing portion, and the other end of the spring is connected with the second fixing portion.

As a preferable mode of the locking device, the locking assembly includes a pawl, a ratchet and an unlocking member, the ratchet is disposed on the slider, the pawl is disposed in the mounting groove and engaged with the ratchet, the pawl and the ratchet cooperate to limit the slider to move only in a direction close to the first groove wall, and the unlocking member is selectively movable to a position for driving the pawl and the ratchet to separate, so that the slider is located in the unlocking position.

As a preferable scheme of the locking device, the ratchets are respectively arranged on two sides of the slider along a direction perpendicular to a moving direction of the slider, two pawls are correspondingly arranged in the mounting groove, one end of each pawl is fixed in the mounting groove, the other end of each pawl is arranged in a suspended manner, and a suspended end of each pawl is meshed with the ratchets.

As a preferable scheme of the locking device, the unlocking member includes an unlocking plate, a protrusion is disposed on one side of the unlocking plate close to the pawl, the protrusion is selectively inserted between the ratchet bar and the pawl to separate the ratchet bar and the pawl, a second elastic member is disposed between the unlocking plate and the bottom of the mounting groove, the second elastic member constantly drives the unlocking plate to move towards one side away from the slider, a pressing hole communicated with the mounting groove is disposed on the main body, a pressing rod is movably disposed in the pressing hole, the unlocking plate overcomes the elastic force of the second elastic member to move towards one side close to the slider under the driving of the pressing rod, and then the protrusion is pushed to be inserted between the pawl and the ratchet bar to realize unlocking.

As a preferred scheme of the locking device, a cover plate is detachably arranged at a notch of the mounting groove, a mounting seat is convexly arranged on one side of the cover plate, which is far away from the mounting groove, a pressing hole is arranged on the cover plate and penetrates through the mounting seat, a locking hole communicated with the pressing hole is arranged on the mounting seat in a penetrating manner, an included angle is formed between the axis of the locking hole and the axis of the pressing hole, when the pressing rod is inserted into the pressing hole, the pressing rod can push the unlocking piece to unlock the sliding block, when the pressing rod is inserted into the locking hole, the pressing rod covers the pressing hole, and the pressing rod is locked on the mounting seat through a padlock.

As a preferable scheme of the locking device, a cover plate for plugging the mounting groove is detachably arranged on a notch of the mounting groove;

one side, close to the mounting groove, of the cover plate is provided with a sliding block limiting groove, the length of the sliding block limiting groove extends along the moving direction of the sliding block, and a limiting column in inserting fit with the sliding block limiting groove is arranged on the sliding block; or, the apron is close to the protruding spacing post that is equipped with in one side of mounting groove, set up the slider spacing groove on the slider, the length in slider spacing groove is followed the moving direction of slider extends.

As a preferable scheme of the locking device, the locking assembly includes a lock cylinder and a pressing hole, at least one side of the slider in the width direction is provided with a groove, the groove is provided with a spring, one end of the spring is connected with the groove bottom of the groove, the other end of the spring is connected with the lock cylinder, the main body is provided with the pressing hole corresponding to the locking position of the slider, when the slider is located at the unlocking position, the lock cylinder is pressed by the groove wall of the mounting groove and located in the groove, and the spring is compressed; when the sliding block moves to the locking position, the spring pushes the lock cylinder to pop out and be partially inserted into the pressing hole.

As a preferable scheme of the locking device, a cover is provided on the main body corresponding to the pressing hole, and the cover is locked on the main body by a padlock.

As a preferable mode of the locking device, one end of the slider near the locking groove is provided with a rough layer.

As a preferable mode of the locking device, the first groove wall is parallel to an end surface of one end of the slider extending into the locking groove.

The invention has the beneficial effects that: through setting up slider and locking Assembly, remove the slider and can support the switch shifting block tight, and operation locking Assembly can lock the slider in locking position, prevents that the slider from removing, and then guarantees that the switch shifting block is locked at locking device's locking inslot, effectively prevents that the switch shifting block from being stirred at will, promotes the security.

Drawings

Fig. 1 is a side view schematically showing a use state of a lock device according to an embodiment of the present invention.

Fig. 2 is a front view schematically illustrating a use state of the locking device according to the embodiment of the present invention.

Fig. 3 is a perspective view of a locking device according to an embodiment of the present invention.

FIG. 4 is a side view of a locking device according to an embodiment of the present invention.

Fig. 5 is a schematic sectional view a-a of fig. 4.

Fig. 6 is an exploded view of a locking device according to an embodiment of the present invention.

Fig. 7 is a perspective view of a locking device according to an embodiment of the present invention (with the cover plate removed).

Fig. 8 is a schematic structural view of a main body of a locking device according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a cover plate of a locking device according to an embodiment of the invention.

Fig. 10 is a schematic structural view of a pawl of a lock device according to an embodiment of the present invention.

Fig. 11 is a schematic view showing the structure of an unlocking member of the locking apparatus according to the embodiment of the present invention.

In the figure:

1. a main body; 11. an abutment plane; 12. a locking groove; 121. a first slot wall; 122. a second slot wall; 13. a guide hole; 14. mounting grooves; 141. hanging a column; 142. a first fixing member; 143. a second fixing member; 15. a through hole; 16. pressing the hole; 17. a first elastic member;

2. a slider; 21. mounting holes; 22. hooking; 23. a limiting column; 24. a rough layer; 25. a ratchet bar;

3. a pawl; 31. a pawl body; 32. a first connection portion; 33. a second connecting portion; 34. a third connecting portion; 35. pawl teeth;

4. unlocking the lock; 41. an unlocking plate; 42. a bump; 43. a second elastic member; 44. a guide post; 45. a convex column.

5. A cover plate; 51. a slider limiting groove; 52. a mounting seat; 521. a locking hole;

6. a pressing lever; 61. a rod body; 62. a limiting plate; 63. a lock hole;

7. a switch; 71. a switch shifting block; 72. a panel.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be further described in detail with reference to the accompanying drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 11, an embodiment of the present invention provides a locking device, which includes a main body 1, a sliding block 2 and a locking device, wherein the main body 1 has an abutting plane 11, a locking groove 12 for accommodating a switch dial 71 is concavely disposed on the abutting plane 11, the locking groove 12 has a first groove wall 121 and a second groove wall 122 which are oppositely disposed, a guiding hole 13 is disposed on the second groove wall 122, a mounting groove 14 is disposed in the main body 1, the mounting groove 14 is communicated with the locking groove 12 through the guiding hole 13, the sliding block 2 is slidably disposed in the guiding hole 13, the sliding block 2 has a locking position and an unlocking position, when the sliding block 2 moves to the locking position, one end of the sliding block 2 extending into the locking groove 12 can abut against the switch dial 71 on the first groove wall 121, when the sliding block 2 moves to the unlocking position, the sliding block 2 is separated from the switch shifting block 71, and the locking assembly is connected with the sliding block 2 and can lock the sliding block 2 at the locking position. Through setting up slider 2 and locking Assembly, remove slider 2 and can support switch shifting block 71 tightly, and operation locking Assembly can prevent slider 2 removal with slider 2 locking in locking position, and then guarantee that switch shifting block 71 is locked in locking device's locking inslot 12, effectively prevent switch shifting block 71 by stirring at will, promote the security.

In an embodiment, a first elastic member 17 is disposed in the mounting groove 14, the first elastic member 17 is respectively connected to the sliding block 2 and the mounting groove 14, and the sliding block 2 always has a movement tendency toward the unlocking position under the driving of the first elastic member 17. Through setting up first elastic component 17, under the condition of locking Assembly unblock, slider 2 can be automatic to the unblock position, does not need manual pulling slider 2 to remove, has promoted the operation convenience.

Optionally, a strip-shaped mounting hole 21 is formed in the slider 2, the length of the mounting hole 21 extends along the moving direction of the slider 2, a first fixing portion is arranged on the hole wall of the mounting hole 21, a second fixing portion is arranged in the mounting groove 14, the first elastic member 17 is a spring, one end of the spring is connected with the first fixing portion, and the other end of the spring is connected with the second fixing portion. The setting of mounting hole 21 can be convenient for hold the spring, reduces the space that the spring took in the mounting groove 14, and the mounting hole 21 is for running through the through-hole structure of 2 thickness directions of slider, the installation of the spring of can being convenient for.

Preferably, the first fixing portion is a hook 22, and the second fixing portion is a hanging column 141 convexly arranged at the bottom of the mounting groove 14. During specific installation, the sliding block 2 is installed in the installation groove 14, the hanging column 141 is located in the installation hole 21, then one end of the spring is hung on the hook 22, and the other end of the spring is fixed on the hanging column 141.

In other embodiments, both the first fixing portion and the second fixing portion may be provided as the hook 22.

Alternatively, both ends of the spring are fixed to the first fixing portion and the second fixing portion, respectively.

In one embodiment, the locking assembly includes a pawl 3, a ratchet 25 and an unlocking member 4, the ratchet 25 is disposed on the sliding block 2, the pawl 3 is disposed in the mounting groove 14 and engaged with the ratchet 25, the engagement between the pawl 3 and the ratchet 25 can limit the sliding block 2 to move only in a direction close to the first groove wall 121, and the unlocking member 4 can be selectively moved to a position for driving the pawl 3 and the ratchet 25 to separate, so that the sliding block 2 is located at the unlocking position. Through setting up pawl 3 and ratchet 25 structure, can make slider 2 according to setting for unidirectional movement, can only move towards the latched position promptly, can not move towards the unblock position, realize pawl 3 and ratchet 25's cooperation unidirectional locking slider 2, and the setting of unblock piece 4 can separate pawl 3 and ratchet 25 for slider 2 can move to the unblock position.

Optionally, the two sides of the slider 2 in the direction perpendicular to the moving direction of the slider 2 are both provided with the ratchets 25, two pawls 3 are correspondingly arranged in the mounting groove 14, one end of each pawl 3 is fixed in the mounting groove 14, the other end of each pawl 3 is suspended, and the suspended end of each pawl 3 is engaged with the ratchets 25. Specifically, the ratchets 25 are respectively disposed on both sides of the slider 2 in the width direction. This design can realize the more steady removal of slider 2, prevents that slider 2 from taking place to rock at the removal in-process or after removing the locking position.

Specifically, two installation positions for installing the pawl 3 are arranged at intervals at the bottom of the installation groove 14, each installation position comprises a first fixing piece 142 and a second fixing piece 143 which are arranged at intervals, the first fixing piece 142 and the second fixing piece 143 are both convexly arranged at the bottom of the installation groove 14, an installation gap is formed between the first fixing piece 142 and the second fixing piece 143, the tops of the first fixing piece 142 and the second fixing piece 143 are slightly lower than the notch of the installation groove 14, the pawl 3 comprises a strip-shaped pawl body 31, a first connecting portion 32 is vertically arranged at one end of the pawl body 31, a second connecting portion 33 is vertically arranged at one end of the first connecting portion 32, the end of the second connecting portion 33, which is far away from the first connecting portion 32, a third connecting portion 34 is vertically arranged at one end of the pawl body 31, which is far away from the first connecting portion 32, and pawl teeth 35 are arranged at one side of the pawl body 31, which is far away from, the pawl tooth 35 is engaged with the ratchet bar 25, the second connecting portion 33 is clamped between the first fixing member 142 and the second fixing member 143, the first fixing member 142 and the side wall of the mounting groove 14 facing the guide hole 13 form a receiving position at an interval, and the third connecting portion 34 is clamped in the receiving position. This design can avoid setting up mounting such as screw and lock pawl 3, only need establish pawl 3 card between first mounting 142 and second mounting 143 can realize fixing pawl 3, has reduced fixed and the dismouting degree of difficulty.

Optionally, the unlocking member 4 includes an unlocking plate 41, a protrusion 42 is disposed on a side of the unlocking plate 41 close to the pawl 3, the protrusion 42 is selectively inserted between the ratchet 25 and the pawl 3 to separate the ratchet 25 from the pawl 3, a second elastic member 43 is disposed between the unlocking plate 41 and a bottom of the mounting groove 14, the second elastic member 43 always drives the unlocking plate 41 to move towards a side away from the slider 2, a pressing hole 16 communicating with the mounting groove 14 is disposed on the main body 1, a pressing rod 6 is movably disposed in the pressing hole 16, and the unlocking plate 41 moves towards a side close to the slider 2 against an elastic force of the second elastic member 43 under the driving of the pressing rod 6, so as to push the protrusion 42 to be inserted between the pawl 3 and the ratchet 25 to unlock. Specifically, two protrusions 42 are provided at intervals on the unlocking plate 41, and when the unlocking plate 41 moves toward the slider 2, the two protrusions 42 are respectively inserted between the two sets of pawls 3 and the ratchet 25, and simultaneously separate the two sets of pawls 3 and the ratchet 25.

Through setting up second elastic component 43, can lose external force at unlocking plate 41 and press back can be rapid reset, guarantee that lug 42 breaks away from pawl 3 for pawl 3 and ratchet 25 can mesh, unlocking plate 41 after resetting drives lug 42 and removes the top to slider 2 simultaneously, and sets up with slider 2 interval, also can not influence the removal of slider 2 this moment.

In this embodiment, the end of the projection 42 remote from the unlocking plate 41 is tapered, which facilitates insertion and removal of the projection 42.

Further, a guide post 44 is convexly arranged on one side of the unlocking plate 41 close to the sliding block 2, the second elastic element 43 is a spring, the spring is sleeved on the guide post 44, and the spring is partially positioned outside the guide post 44 and abutted against the bottom of the mounting groove 14. By providing the guide post 44, the spring position can be prevented from moving, and the unlocking plate 41 can be ensured to work normally.

In this embodiment, guide posts 44 are provided at both ends of the unlocking plate 41 in the longitudinal direction.

In other embodiments, the unlocking plate 41 is rectangular, the guide posts 44 are disposed at four corners of the unlocking plate 41, and each guide post 44 is sleeved with a spring. The four guide posts 44 form a rectangular support surface to allow for more smooth movement of the unlocking plate 41.

In addition, a convex column 45 is convexly arranged on one side of the unlocking plate 41, which is far away from the slider 2, the convex column 45 is arranged in the middle of the unlocking plate 41, and part of the convex column 45 is inserted into the pressing hole 16.

Optionally, the protruding pillar 45 is cylindrical, the pressing hole 16 is a circular hole, and the protruding pillar 45 is in clearance fit with the pressing hole 16. The design of the protruding columns 45 can further enhance the stability of the movement of the unlocking plate 41, and prevent the unlocking plate 41 from being dislocated in the moving process.

In an embodiment, the mounting groove 14 is an open groove formed in the main body 1, a cover plate 5 is detachably disposed at a notch of the mounting groove 14, a mounting seat 52 is convexly disposed on a side of the cover plate 5 away from the mounting groove 14, the pressing hole 16 is disposed on the cover plate 5 and penetrates through the mounting seat 52, a locking hole 521 communicated with the pressing hole 16 is formed in the mounting seat 52, an axis of the locking hole 521 and an axis of the pressing hole 16 form an included angle, when the pressing rod 6 is inserted into the pressing hole 16, the pressing rod 6 can push the unlocking piece 4 to unlock the slider 2, when the pressing rod 6 is inserted into the locking hole 521, the pressing rod 6 shields the pressing hole 16, and the pressing rod 6 is locked on the mounting seat 52 by a padlock (not shown in the figure). Through being the open slot with mounting groove 14 to can dismantle and set up apron 5, can be convenient for install slider 2, pawl 3 isotructure, reduce the installation and maintain the degree of difficulty, apron 5 can restrict the position of unlocking board 41 simultaneously, makes unlocking board 41 only can remove and can not break away from mounting groove 14 along the degree of depth direction of mounting groove 14 in mounting groove 14.

Specifically, the cover 5 is fixed to the body 1 by screws or rivets.

Optionally, press the pole 6 to include the body of rod 61 and set up and be in the limiting plate 62 of the body of rod 61 one end, the other end of the body of rod 61 is provided with the confession the lockhole 63 that the padlock passes through, works as press the pole 6 to insert to when in the locking hole 521, the limiting plate 62 is restricted in one side of mount pad 52, the lockhole 63 expose in the opposite side confession of mount pad 52 the padlock locking. The pressing rod 6 with the structure can realize two functions, one function is to unlock the sliding block 2, the other function is to prevent other personnel without padlock keys from randomly pressing the unlocking piece 4 through the pressing hole 16 to unlock the sliding block 2, and the safety is improved.

The lockhole 63 on the body of rod 61 can be one, two or even a plurality of, when the lockhole 63 sets up to a plurality of, can hang a plurality of padlocks, can realize that many people open simultaneously and just can the unblock in many people's operation, stops the potential safety hazard completely.

In one embodiment, a through hole 15 is opened on a side wall of the mounting groove 14 opposite to the guide hole 13, the through hole 15 communicates the mounting groove 14 and the outside of the main body 1, and one end of the slider 2 away from the locking groove 12 passes through the through hole 15 and extends to the outside of the main body 1. By providing this through hole 15, the state of unlocking and unlocking of the slider 2 can be observed conveniently. In addition, if the first elastic member 17 is not provided in the mounting groove 14, the slider 2 can be manually pulled to move to the unlocking position by the portion of the slider 2 exposed through the through hole 15.

Specifically, this through hole 15 extends to the notch of the mounting groove 14 in the groove depth direction of the mounting groove 14. This design can be convenient for the installation of slider 2, and when specifically using, apron 5 can the notch of shutoff mounting groove 14 to keep away from the one end restriction in through-hole 15 of locking groove 12 with slider 2.

In one embodiment, a sliding block limiting groove 51 is disposed on one side of the cover plate 5 close to the mounting groove 14, the length of the sliding block limiting groove 51 extends along the moving direction of the sliding block 2, and a limiting post 23 in plug-in fit with the sliding block limiting groove 51 is disposed on the sliding block 2. Through setting up slider spacing groove 51 and spacing post 23, can restrict the shift position of slider 2, prevent that slider 2 from being pulled out to the mounting groove 14 outside, especially when being provided with first elastic component 17 on slider 2, this slider spacing groove 51 and spacing post 23 still can prevent effectively that slider 2 from popping out under the elastic force effect of first elastic component 17.

Of course, the positions of the slider limiting groove 51 and the limiting post 23 can be replaced, for example, the cover plate 5 is close to the limiting post 23 convexly arranged on one side of the mounting groove 14, the slider limiting groove 51 is arranged on the slider 2, or the cover plate 5 is provided with the limiting post 23 and the slider limiting groove 51, and the slider 2 is provided with the slider limiting groove 51 and the limiting post 23 at the corresponding positions.

In one embodiment, the locking assembly is not limited to the structure of the pawl 3 and the ratchet 25, and may be configured as other structures capable of locking the position of the slider 2, for example, the locking assembly includes a lock cylinder and a pressing hole 16, at least one side of the slider 2 in the width direction is provided with a groove, the groove is provided with a spring, one end of the spring is connected to the groove bottom of the groove, the other end of the spring is connected to the lock cylinder, the pressing hole 16 is opened on the main body 1 corresponding to the locked position of the slider 2, when the slider 2 is located at the unlocked position, the lock cylinder is pressed by the groove wall of the mounting groove 14 and located in the groove, and the spring is compressed; when the sliding block 2 moves to the locking position, the spring pushes the lock cylinder to pop out and be partially inserted into the pressing hole 16.

Optionally, a cover is disposed on the main body 1 corresponding to the pressing hole 16, and the cover is locked on the main body 1 by a padlock.

In order to improve the smoothness of the sliding block 2, a rotatable gear may be provided on the groove wall of the mounting groove 14, racks may be provided on both sides of the sliding block 2 in the width direction, and the smoothness of the sliding may be improved by the cooperation of the racks and the gears.

Further alternatively, a ball is provided on the groove wall of the mounting groove 14 or the side surface of the slider 2 that is attached to the groove wall of the mounting groove 14, and friction between the slider 2 and the groove wall of the mounting groove 14 is reduced by rolling friction of the ball, thereby improving smoothness of sliding.

In one embodiment, the slider 2 is provided with a rough layer 24 at an end thereof adjacent to the locking groove 12. By providing the rough layer 24, friction between the slider 2 and the surface of the switch dial 71 can be increased, and the switch dial 71 is prevented from being disengaged from the locking groove 12.

Preferably, the rough layer 24 is a convex tooth convexly provided on the slider 2.

In one embodiment, the first groove wall 121 is parallel to an end surface of the slider 2 extending to an end inside the locking groove 12.

Further, the first groove wall 121 is parallel to the second groove wall 122, an included angle between the first groove wall 121 and the abutting plane 11 is greater than 90 degrees, and an included angle between the second groove wall 122 and the abutting plane 11 is less than 90 degrees. When the installation, switch shifting block 71 of switch 7 is stirred to the outage state after, switch shifting block 71 can be the contained angle setting with switch 7's panel 72, consequently, sets up locking groove 12 with locking device to the chute structure, can be convenient for lock switch shifting block 71.

The above examples are only intended to illustrate the details of the invention, which is not limited to the above details, i.e. it is not intended that the invention must be implemented in such detail. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.

Claims

1. A locking device, comprising:

the locking assembly is connected with the sliding block and can lock the sliding block at the locking position, the locking assembly comprises a pawl, a ratchet strip and an unlocking piece, the ratchet strip is arranged on the sliding block, the pawl is arranged in the mounting groove and is meshed with the ratchet strip, the sliding block can be limited to move only in the direction close to the first groove wall by the cooperation of the pawl and the ratchet strip, the unlocking piece can selectively move to a position for driving the pawl and the ratchet strip to be separated, and then the sliding block is located at the unlocking position.

2. The locking device of claim 1, wherein a first elastic member is disposed in the mounting groove, the first elastic member is connected to the sliding block and the mounting groove, and the sliding block always has a movement tendency toward the unlocking position under the driving of the first elastic member.

3. The locking device according to claim 2, wherein the slider is provided with a strip-shaped mounting hole, the length of the mounting hole extends along the moving direction of the slider, a first fixing portion is provided on a wall of the mounting hole, a second fixing portion is provided in the mounting hole, the first elastic member is a spring, one end of the spring is connected with the first fixing portion, and the other end of the spring is connected with the second fixing portion.

4. The locking device of claim 1, wherein the two sides of the slider perpendicular to the moving direction of the slider are provided with the ratchets, two pawls are correspondingly arranged in the mounting groove, one end of each pawl is fixed in the mounting groove, the other end of each pawl is suspended, and the suspended end of each pawl is engaged with the ratchets.

5. The locking device of claim 1, wherein the unlocking member includes an unlocking plate, a protrusion is disposed on a side of the unlocking plate close to the pawl, the protrusion is selectively inserted between the ratchet bar and the pawl to separate the ratchet bar from the pawl, a second elastic member is disposed between the unlocking plate and the bottom of the mounting groove, the second elastic member constantly drives the unlocking plate to move toward a side away from the slider, a pressing hole is disposed on the main body and communicates with the mounting groove, a pressing rod is movably disposed in the pressing hole, the unlocking plate overcomes the elastic force of the second elastic member to move toward a side close to the slider under the driving of the pressing rod, and the protrusion is further inserted between the pawl and the ratchet bar to unlock the locking device.

6. The locking device according to claim 5, wherein a cover plate is detachably disposed at a notch of the mounting groove, a mounting seat is protruded from a side of the cover plate away from the mounting groove, the pressing hole is disposed on the cover plate and penetrates through the mounting seat, a locking hole communicated with the pressing hole is formed in the mounting seat, an axis of the locking hole and an axis of the pressing hole are disposed at an included angle, when the pressing rod is inserted into the pressing hole, the pressing rod can push the unlocking member to unlock the slider, when the pressing rod is inserted into the locking hole, the pressing rod blocks the pressing hole, and the pressing rod is locked on the mounting seat by a padlock.

7. The locking device of claim 1, wherein the notch of the mounting groove is detachably provided with a cover plate for plugging the mounting groove;

8. The locking device of claim 1, wherein the locking assembly comprises a lock cylinder and a pressing hole, at least one side of the width direction of the sliding block is provided with a groove, the groove is provided with a spring, one end of the spring is connected with the groove bottom of the groove, the other end of the spring is connected with the lock cylinder, the pressing hole is formed in the main body corresponding to the locking position of the sliding block, when the sliding block is located at the unlocking position, the lock cylinder is pressed by the groove wall of the installation groove and located in the groove, and the spring is compressed; when the sliding block moves to the locking position, the spring pushes the lock cylinder to pop out and be partially inserted into the pressing hole.

9. The locking device of claim 8, wherein a cover is provided on the body corresponding to the pressing hole, and the cover is locked to the body by means of a padlock.

10. The locking device of claim 1 wherein the slider is provided with a roughened layer at an end adjacent the locking groove.

11. The locking device of claim 1 wherein said first groove wall extends parallel to an end face of said slider to an end within said locking groove.