Safety lock for electrical cabinet

Abstract

The utility model discloses a safety lock for an electrical cabinet, and belongs to the technical field of safety locks, the safety lock comprises a lock body, a bolt and a key, the lock body comprises a body, a lock cylinder and a support marble, the lock cylinder is rotatably matched with the body, the support marble is matched with the body in a sliding mode in the length direction of the lock cylinder, the lock cylinder is provided with at least two support grooves, and the bolt is inserted into the support grooves. The body is provided with a support spring, and the support marble is inserted into one of the support grooves under the elastic action of the support spring. The key is matched with the lock cylinder in an inserted mode, and when the key is inserted into the lock cylinder, the support marbles are separated from the support grooves. The bolt is matched with the body in an inserted mode, the body is matched with a locking marble in a sliding mode, and when the support marble is separated from the support groove and the lock cylinder is rotated, the locking marble locks or unlocks the bolt. The cabinet door has the advantages that the cabinet door is not prone to being opened or closed by mistake after the key is inserted into the lock cylinder, and safety is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of safety locks, in particular to a safety lock for an electrical cabinet. BACKGROUND

[0002] The safety lock for an electrical cabinet is a safety protection device specially designed for electrical control cabinets, distribution boxes and other equipment, mainly used for limiting unauthorized personnel from contacting electrical components in the cabinet, ensuring equipment safety and personnel operation standard. Its core functions include physical protection, permission management and environmental isolation, preventing misoperation, theft or accidental electric shock accidents, and also having dustproof, waterproof, corrosion-resistant and other characteristics to adapt to complex environments such as industry, power and communication.

[0003] The safety lock for an electrical cabinet usually includes a lock body and a latch, wherein the lock body and the latch are fixedly installed on the wall (or the cabinet body) and the cabinet door respectively, and the cabinet door is locked by inserting the latch into the lock body. When the cabinet door needs to be opened, the key is inserted into the lock cylinder of the lock body and rotated to make the latch disengage from the lock body, thereby unlocking the cabinet door and facilitating the opening and closing of the cabinet door.

[0004] The existing safety lock for an electrical cabinet is usually directly rotated after the key is inserted into the lock cylinder to lock or unlock the cabinet door. The key is easily rotated by external force, causing the cabinet door to be mistakenly opened or closed, and the safety is poor. CONTENT OF THE INVENTION

[0005] In order to prevent the cabinet door from being mistakenly opened or closed after the key is inserted into the lock cylinder and improve the safety, the application provides a safety lock for an electrical cabinet.

[0006] The safety lock for an electrical cabinet provided by the application adopts the following technical scheme:

[0007] A safety lock for an electrical cabinet includes a lock body, a latch and a key. The lock body includes a body, a lock cylinder and a bracket spring. The lock cylinder is rotationally fitted to the body. The bracket spring is slidingly fitted to the body along the length direction of the lock cylinder. The lock cylinder is provided with at least two bracket grooves. The body is provided with a bracket spring. The bracket spring is inserted into one of the bracket grooves under the elastic force of the bracket spring. The key is inserted into the lock cylinder. When the key is inserted into the lock cylinder, the bracket spring is disengaged from the bracket groove. The latch is inserted into the body. The body is slidingly fitted with a locking spring. When the bracket spring is disengaged from the bracket groove and the lock cylinder is rotated, the locking spring locks or unlocks the latch.

[0008] By adopting the technical scheme, the safety lock fixes the lock body and the bolt respectively on the cabinet body and the cabinet door in use, and moves the cabinet door to make the bolt inserted into the body of the lock body, and then inserts the key, when the key is inserted into the lock core and the bracket pin is separated from the bracket groove, the locking of the lock core is released, at this time, rotating the lock core can make the locking pin lock or unlock, thereby facilitating the locking or unlocking of the cabinet door, when the key is inserted into the lock core without force, the bracket pin is limited to the position of the lock core through cooperation with the bracket groove, thereby making the lock core not easy to rotate due to the external force of the key, and thereby making the cabinet door not easy to be opened or closed, and the safety is high.

[0009] Optionally, a plurality of the bracket pin and the bracket groove are arranged one by one, and each of the bracket pin and the bracket groove is uniformly distributed around the axis of the lock core.

[0010] By adopting the technical scheme, the cooperation of the plurality of bracket pins and the bracket grooves facilitates to more stably limit the position of the lock core, and is beneficial to further ensure the stability of the position of the lock core.

[0011] Optionally, the top of the lock core is provided with a plurality of connecting portions, and the key is concave and provided with a connecting groove corresponding to each connecting portion.

[0012] By adopting the technical scheme, the cooperation of the connecting portion and the connecting groove is beneficial to further ensure the connection stability between the key and the lock core, and at the same time, by setting the connecting portions with different shapes and sizes, the separate adaptation of the key and the lock body can be realized, which is beneficial to enhance the security.

[0013] Optionally, the connecting portions are parallel and provided with two groups, each group is provided with three connecting portions, and each connecting portion is L-shaped or square.

[0014] By adopting the technical scheme, the connection stability between the connecting portion and the key can be ensured, the structural strength of the lock core can be ensured, and the production cost of the lock core can be reduced as much as possible.

[0015] Optionally, the key is fixedly connected with a positioning portion, the body is provided with a containing groove, the lock core is located in the containing groove, and the groove wall of the containing groove is concave and provided with a positioning groove inserted and matched with the positioning portion.

[0016] By adopting the technical scheme, the containing groove is beneficial to realize the further protection of the lock core, and at the same time, the cooperation of the positioning portion and the positioning groove plays a positioning role when the key is inserted, which is beneficial to quickly insert the key into the position corresponding to the lock core to realize the locking or unlocking of the bolt.

[0017] Optionally, the lock cylinder is provided with a locking reset slot in plug connection with the locking pin, and a reset spring and a reset pin are arranged in the locking reset slot.

[0018] By adopting the above technical scheme, when the lock cylinder is rotated to make the locking reset slot correspond to the position of the locking pin, the locking pin can be moved into the locking reset slot under the horizontal component force, thereby achieving unlocking of the bolt, and the reset pin applies an elastic force to the locking pin at this time, thereby facilitating the locking pin to maintain the stability of the state thereof without external force.

[0019] Optionally, the body is fixedly connected with a pin limiting pin, and the locking pin is provided with a limiting sliding slot extending along the length direction thereof, and the pin limiting pin is slidingly fitted in the limiting sliding slot.

[0020] By adopting the above technical scheme, the cooperation of the pin limiting pin and the limiting sliding slot limits the sliding movement stroke of the locking pin, thereby preventing the locking pin from being easily pulled out of the body when sliding, and facilitating to ensure the stability of the locking pin when sliding.

[0021] Optionally, the bolt is provided with a plurality of clamping teeth, and the locking pin is located between two adjacent clamping teeth when the locking pin locks the bolt.

[0022] By adopting the above technical scheme, the clamping teeth facilitate to apply a horizontal component force of the locking pin to the lock cylinder, thereby facilitating to quickly open the cabinet door after the locking pin unlocks the bolt.

[0023] Optionally, the bolt comprises a mounting plate, a tower spring, a height limiting column and a plug-in part, the plug-in part is in plug connection with the body, the height limiting column is fixedly installed on the plug-in part, one end of the height limiting column is in plug connection with the mounting plate and is in threaded connection with a limiting nut, and the tower spring is sleeved on the height limiting column.

[0024] By adopting the above technical scheme, the tower spring serves as an elastic buffer when the plug-in part is inserted into the body, thereby serving as a buffer when the cabinet door is locked, so that the bolt and the cabinet door are not easily damaged due to excessive instantaneous pressure, and the service life of the bolt and the cabinet door is facilitated to be ensured.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1、When the key is inserted into the lock core without force, the support spring is limited to the position of the lock core through cooperation with the support groove, so that the lock core is not easy to rotate due to the external force of the key, and the cabinet door is not easy to be opened or closed by mistake, and the safety is high.

[0027] 2、The cooperation of the connecting part and the connecting groove is conducive to further ensuring the stability of the connection between the key and the lock core, and at the same time, by setting connecting parts of different shapes and sizes, the key and the lock body can be individually adapted, which is conducive to enhancing the security.

[0028] 3、The setting of the tower spring plays a role in elastic buffering when the plug-in part is inserted into the body, and further plays a role in buffering when the cabinet door is locked, so that the bolt and the cabinet door are not easy to be damaged due to excessive instantaneous pressure, which is conducive to ensuring the service life of the bolt and the cabinet door. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the application.

[0030] Figure 2 It is a schematic diagram of the local section of the body in the embodiment of the application.

[0031] Figure 3 It is a schematic diagram of the local section of the body and the lock core in the embodiment of the application.

[0032] Figure 4 It is a schematic diagram of the key structure in the embodiment of the application.

[0033] BRIEF DESCRIPTION OF DRAWINGS:

[0034] 1, lock body; 101, body; 1011, base; 1012, top seat; 102, lock core; 1021, lock body; 1022, lock head; 103, support spring; 2, bolt; 201, mounting plate; 202, tower spring; 203, height limiting column; 204, plug-in part; 3, key; 4, accommodating groove; 5, accommodating sliding groove; 6, support spring; 7, support groove; 8, lock groove; 9, connecting part; 10, connecting groove; 11, positioning part; 12, positioning groove; 13, lock accommodating groove; 14, limiting spring; 15, lock block; 16, lock limiting groove; 17, locking reset groove; 18, reset spring; 19, reset spring; 20, lock hole; 21, lock sliding groove; 22, locking spring; 23, spring limiting pin; 24, limiting sliding groove; 25, limiting nut. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings Figures 1-4 The application will be further described in detail.

[0036] The embodiment of the application discloses a safety lock for an electrical cabinet. Referring to Figure 1 andFigure 2 The safety lock for electrical cabinet comprises a lock body 1, a bolt 2 and a key 3, wherein the lock body 1 comprises a body 101, a lock cylinder 102 and a support spring 103, wherein the body 101 comprises a base 1011 and a top seat 1012, and the top seat 1012 is fixedly installed on one side of the base 1011 by means of bolts.

[0037] With reference to Figure 1 and Figure 2 , the inside of the top seat 1012 is provided with a receiving groove 4, and the groove opening of the receiving groove 4 is located on the side of the top seat 1012 away from the base 1011 and is arranged in a regular polygonal shape. In the embodiment of the application, the groove opening of the receiving groove 4 is in a regular octagonal shape. The lock cylinder 102 comprises a lock body 1021 and a lock head 1022 fixedly connected to one end of the lock body 1021, and the cross section of the lock head 1022 is in a regular octagonal shape and the cross section size of the lock head 1022 is smaller than the groove opening size of the receiving groove 4. The lock body 1021 is sequentially arranged in the top seat 1012 and the base 1011 by means of the groove bottom of the receiving groove 4, i.e. arranged in the body 101 and rotationally matched with the body 101.

[0038] With reference to Figure 2 and Figure 3 , the bottom wall of the receiving groove 4 is uniformly provided with four receiving sliding grooves 5 around the axis of the lock body 1021, and the support spring 103 is provided with four corresponding support springs 6, and each support spring 103 is slidingly matched in each receiving sliding groove 5. Each receiving sliding groove 5 is provided with a support spring 6, one end of the support spring 6 is connected to the bottom wall of the receiving sliding groove 5, and the other end is connected to the support spring 103, so that one end of each support spring 103 is respectively penetrated out of the receiving sliding groove 5 under the elastic force of each support spring 6.

[0039] With reference to Figure 2 and Figure 3 , the outer circumferential surface of the lock head 1022 is provided with a support recess 7 corresponding to the support spring 103, each support recess 7 extends to the bottom of the lock head 1022, each support spring 103 is inserted and matched in each support recess 7, and each support spring 103 is partially located outside the support recess 7. The top of each support spring 103 is in a circular truncated cone shape with gradually decreasing area, so as to facilitate the insertion of the support spring 103 into the support recess 7. When each support spring 103 is located in each receiving sliding groove 5, it is convenient to rotate the lock cylinder 102 by applying force, and the arrangement of each support spring 103 is conducive to ensuring the stability of the position of the lock cylinder 102 in normal state.

[0040] With reference to Figure 1 and Figure 2, the notch of the accommodation groove 4 is inserted with the key 3, the end of the key 3 towards the lock body 1 is concavely provided with a lock slot 8 matched with the shape of the lock head 1022, the lock head 1022 is inserted into the lock slot 8, and the end of the key 3 is abutted against the bottom wall of the accommodation groove 4 and pushes the support pin 103 into the accommodation sliding groove 5, so that the rotation of the key 3 can realize the rotation of the lock core 102.

[0041] Referring to Figure 2 and Figure 4 In order to further ensure the safety of the lock, the end of the lock head 1022 away from the lock body 1021 is protrudingly provided with a connecting part 9, two groups of the connecting part 9 are parallelly arranged in the embodiment, and each group of the connecting part 9 is provided with three connecting parts 9; each connecting part 9 is in L shape or square shape, and the connecting part 9 in L shape is provided with a gap facing at least two directions, so as to ensure the safety of the lock by arranging the connecting parts 9 with different shapes and different angles. The bottom wall of the lock slot 8 is concavely provided with a connecting slot 10 matched with the connecting part 9 and matched with the shape of each connecting part 9, so that the key 3 is matched with the connecting part 9. In order to facilitate the key 3 to be quickly inserted into the position connected with the lock head 1022, the outer circumferential surface of the key 3 is fixedly connected with two positioning parts 11, and the groove wall of the notch of the accommodation groove 4 is concavely provided with two positioning slots 12 corresponding to the positions of the two positioning parts 11, the positioning slots 12 are throughly arranged along the axis of the lock core 102, so that the positioning part 11 and the positioning slot 12 are matched to realize the positioning of the key 3 when the key 3 is inserted.

[0042] Referring to Figure 2 and Figure 3 When the key 3 is rotated after being connected with the lock core 102, the positioning part 11 also plays a limiting role on the key 3, so that the key 3 is not easy to be separated from the accommodation groove 4, thereby facilitating the control of the position of the key 3 after being rotated. In order to further limit the rotation of the lock core 102, the free end of the lock body 1021 located in the top seat 1012 is concavely provided with a lock accommodation groove 13, the lock accommodation groove 13 is provided with a limiting spring 14 and a lock block 15, one end of the limiting spring 14 is connected to the bottom wall of the lock accommodation groove 13, and the other end of the limiting spring 14 is connected to the lock block 15, so as to apply a spring force to the lock block 15 away from the lock body 1021. The inner wall of the top seat 1012 is concavely provided with a lock limiting slot 16 in arc shape and corresponding to the lock block 15, one end of the lock block 15 is inserted into the lock limiting slot 16 and is slidably matched with the lock limiting slot 16, so that the lock limiting slot 16 and the lock block 15 are matched to limit the rotation of the lock.

[0043] Continuing to refer to Figure 2 and Figure 3The lock body 1021 is located at the free end of the base 1011 and is concave to form a locking reset slot 17. In the embodiment of the application, three locking reset slots 17 are distributed along the axis direction of the lock body 1021. A reset spring 18 and a reset marble 19 are arranged in each locking reset slot 17. A locking marble 22 is slidingly fitted in the locking reset slot 17. One end of the reset spring 18 is connected to the bottom wall of the locking reset slot 17, and the other end is connected to the reset marble 19, so as to apply a spring force to the reset marble 19 in the direction away from the axis of the lock cylinder 102.

[0044] With reference to Figure 3 The base 1011 is provided with a through-type lock hole 20. The hole wall of the lock hole 20 is provided with a lock sliding slot 21 extending in the direction perpendicular to the axis of the lock cylinder 102. Three lock sliding slots 21 are arranged one by one with the locking reset slots 17. A locking marble 22 is slidingly fitted in each lock sliding slot 21. When the lock cylinder 102 is rotated to make the locking reset slot 17 correspond to the position of the locking marble 22, the locking marble 22 can be moved into the locking reset slot 17 under the action of the horizontal component force. When the lock cylinder 102 is rotated to make the outer peripheral surface of the lock cylinder 102 contact with the locking marble 22, the lock cylinder 102 plays a limiting role on the locking marble 22.

[0045] With reference to Figure 3 To prevent the locking marble 22 from being separated from the lock sliding slot 21 and further ensure the sliding stability of the locking marble 22, the base 1011 of the body 101 is fixedly connected with a marble limiting pin 23. Each locking marble 22 is provided with a limiting sliding slot 24 extending in the length direction of the locking marble 22. The marble limiting pin 23 is slidingly fitted in the limiting sliding slot 24 of each locking marble 22 to limit the sliding of each locking marble 22.

[0046] With reference to Figure 2 and Figure 3 The bolt 2 comprises a mounting plate 201, a tower spring 202, a height limiting column 203, and a plug-in part 204. The plug-in part 204 is plug-in fitted with the lock hole 20 of the body 101. One end of the height limiting column 203 is fixedly installed on the plug-in part 204 by a bolt, and the other end is plug-in fitted on the mounting plate 201 and is threadedly fitted with a limiting nut 25. The tower spring 202 is sleeved on the height limiting column 203, and one end of the tower spring 202 is connected to the plug-in part 204, and the other end is connected to the mounting plate 201, so as to play a role of elastic buffering when the plug-in part 204 is inserted into the body 101. The plug-in part 204 is provided with a plurality of clamping teeth. When the plug-in part 204 is inserted into the lock hole 20 and each locking marble 22 locks the plug-in part 204, each locking marble 22 is located between two adjacent clamping teeth. On the one hand, it is beneficial to fully ensure the locking stability of the locking marble 22 to the plug-in part 204. On the other hand, it is convenient to apply a horizontal component force to the locking marble 22 when the plug-in part 204 is separated from the lock hole 20.

[0047] The implementation principle of the safety lock for the electrical cabinet is as follows: when the safety lock is used, firstly, the lock body 1 and the bolt 2 are fixedly installed on the cabinet body and the cabinet door respectively, the cabinet door is moved, the insertion part 204 of the bolt 2 is inserted into the lock hole 20 of the lock body 1, the cabinet body and the cabinet door are locked, then the key 3 is inserted, when the key 3 is inserted into the lock core 102 and the support spring 6 is pressed to make the support spring 103 located in the support groove 7, the key 3 is rotated, the key 3 drives the lock core 102 to rotate to the position corresponding to the reset spring 19 and the locking spring 22, the locking spring 22 unlocks the insertion part 204, i.e. the bolt 2; when the key 3 is inserted into the lock core 102 without pressing and rotating, the support spring 103 is located in the support groove 7 under the elastic force of the support spring 6, the position of the lock core 102 is limited through cooperation with the support groove 7, the lock core 102 is not easy to rotate due to the external force of the key 3, and the cabinet door is not easy to be opened or closed by mistake, and the safety is high.

[0048] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A safety lock for electrical cabinets comprising a lock body (1), a bolt (2) and a key (3), characterized in that: The lock body (1) comprises a body (101), a lock cylinder (102) and a support pin (103), the lock cylinder (102) is rotationally fitted in the body (101), the support pin (103) is slidingly fitted in the body (101) along the length direction of the lock cylinder (102), the lock cylinder (102) is provided with at least two support grooves (7), the body (101) is provided with a support spring (6), the support pin (103) is inserted into one of the support grooves (7) under the elastic force of the support spring (6); the key (3) is insertedly fitted with the lock cylinder (102), when the key (3) is inserted into the lock cylinder (102), the support pin (103) is separated from the support groove (7); the bolt (2) is insertedly fitted with the body (101), the body (101) is slidingly fitted with a locking pin (22), when the support pin (103) is separated from the support groove (7) and the lock cylinder (102) is rotated, the locking pin (22) locks or unlocks the bolt (2).

2. A safety lock for electrical cabinets according to claim 1, characterized in that: The support pin (103) and the support groove (7) are one-to-one corresponding and are uniformly distributed around the axis of the lock cylinder (102).

3. A safety lock for electrical cabinets according to claim 1, characterized in that: The top of the lock cylinder (102) is provided with a plurality of connecting parts (9), the key (3) is concavely provided with a connecting groove (10) corresponding to each connecting part (9) and insertedly fitted.

4. A safety lock for an electrical cabinet according to claim 3, characterized in that: The connecting parts (9) are parallelly provided with two groups, each group of the connecting parts (9) is provided with three connecting parts (9), and each connecting part (9) is L-shaped or square-shaped.

5. A safety lock for electrical cabinets according to claim 2, characterized in that: The key (3) is fixedly connected with a positioning part (11), the body (101) is provided with a containing groove (4), the lock cylinder (102) is located in the containing groove (4), and the groove wall of the containing groove (4) is concavely provided with a positioning groove (12) insertedly fitted with the positioning part (11).

6. A safety lock for electrical cabinets according to claim 1, characterized in that: The lock cylinder (102) is provided with a locking reset groove (17) insertedly fitted with the locking pin (22), the locking reset groove (17) is provided with a reset spring (18) and a reset pin (19), the reset pin (19) is slidingly fitted in the locking reset groove (17), and the reset spring (18) applies an elastic force to the reset pin (19) in the direction away from the axis of the lock cylinder (102).

7. A safety lock for an electrical cabinet according to claim 6, characterized in that: The body (101) is fixedly connected with a pin limiting pin (23), the locking pin (22) is provided with a limiting sliding groove (24) extending along the length direction of the locking pin (22), and the pin limiting pin (23) is slidingly fitted in the limiting sliding groove (24).

8. A safety lock for electrical cabinets according to claim 1, characterized in that: The bolt (2) is provided with a plurality of clamping teeth, and when the locking pin (22) locks the bolt (2), the locking pin (22) is located between two adjacent clamping teeth.

9. A safety lock for an electrical cabinet according to claim 8, characterized in that: The latch (2) comprises a mounting plate (201), a tower spring (202), a height limiting column (203) and a plug-in part (204), the plug-in part (204) is plugged with the body (101), the height limiting column (203) is fixedly installed on the plug-in part (204), one end of the height limiting column (203) is plugged into the mounting plate (201) and is screwed with a limiting nut (25), and the tower spring (202) is sleeved outside the height limiting column (203).

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