Lock for ring main unit

Abstract

The utility model belongs to the technical field of locks, and discloses a ring main unit lock which comprises a lock shell, a handle, a lock cylinder, a spring bolt and a locking piece. The handle is movably connected to the lock shell, the lock cylinder is arranged on the handle, and a blocking piece is arranged on the lock cylinder. The lock tongue is elastically arranged in the lock shell, the blocking piece is provided with a first position, a second position and a third position, the blocking piece abuts against the first side, close to the handle, of the lock tongue at the first position, the blocking piece abuts against the second side, away from the handle, of the lock tongue at the second position, and the blocking piece and the lock tongue are staggered at the third position; the locking piece is detachably connected to the lock shell, and when the locking piece is assembled to the lock shell, the locking piece abuts against the spring bolt to limit the spring bolt to retreat. When the ring main unit lock is locked, the ring main unit lock can be directly locked without a key, or the ring main unit lock can be switched into two locking modes which must be locked by the key, so that the operation convenience is improved.

Description

Technical Field

[0001] This utility model belongs to the field of lock technology, specifically relating to a lock for a ring main unit. Background Technology

[0002] Ring main units (RMMs) are a common type of electrical equipment used in substations and power distribution stations. During operation, for safety and asset protection, the management department will lock the RMMs to prevent misoperation and theft.

[0003] Existing ring main unit locks require a key to unlock, followed by lifting the handle. Rotating the handle then activates the vertical lever inside the cabinet, opening the door. After operation, the door is closed, the handle is rotated back, and the key is used to lock it again. Throughout this process, the key is involved in both unlocking and locking. However, in actual field use, locking is often performed directly after equipment operation, making the existing ring main unit lock inconvenient to operate when locking. Utility Model Content

[0004] The purpose of this utility model is to provide a lock for a ring main unit, which can be locked directly without a key when closed, or can be switched to lockable only with a key.

[0005] The following technical solutions are used to achieve the above objectives.

[0006] This utility model embodiment provides a lock for a ring main unit, which includes a lock shell, a handle, a lock cylinder, a lock tongue, and a locking component;

[0007] The handle is movably connected to the lock housing, the lock cylinder is disposed on the handle, and the lock cylinder is provided with a stop; the bolt is elastically disposed within the lock housing.

[0008] The stop has a first position, a second position and a third position. In the first position, the stop abuts against the first side of the latch near the handle. In the second position, the stop abuts against the second side of the latch away from the handle. In the third position, the stop is offset from the latch.

[0009] The locking member is detachably connected to the lock housing. When the locking member is assembled into the lock housing, it abuts against the bolt to restrict the bolt from moving backward.

[0010] In some embodiments, the latch has a guide ramp on the first side near the handle.

[0011] In some embodiments, the second side of the latch away from the handle is provided with a stepped structure, the lock housing is provided with a through hole communicating with the stepped structure, and the locking member passes through the through hole and abuts against the stepped surface of the stepped structure to restrict the retraction of the latch.

[0012] In some embodiments, the locking element is threadedly connected to the through hole.

[0013] In some embodiments, the stop includes a body and a protrusion connected to the body, the body being connected to the lock cylinder, the protrusion protruding from the sidewall of the lock cylinder, and the side of the protrusion adjacent to the latch being an inclined surface adapted to the guide slope.

[0014] In some embodiments, the lock housing is provided with a fixed base, the fixed base has a receiving cavity, the lock tongue is disposed in the receiving cavity by an elastic member along a first direction, and the lock tongue is partially exposed outside the fixed base when it is in a normal state. The inclined surface of the protrusion acts on the guide inclined surface of the lock tongue along a second direction under the action of external force, so that the lock tongue retracts into the receiving cavity along the first direction. The first direction and the second direction intersect.

[0015] In some embodiments, the body has a first limiting hole, the end of the lock cylinder has a limiting post, and the limiting post has a second limiting hole. The limiting post is inserted into the first limiting hole, and the second limiting hole is exposed on the side of the stop away from the lock cylinder. The body is inserted into the second limiting hole by a pin to lock it onto the lock cylinder.

[0016] In some embodiments, the handle is rotatably mounted on the lock housing, and the handle is connected to the lock housing by a torsion spring device.

[0017] In some embodiments, the lock housing is provided with a locking seat with an open end, the lock cylinder is rotatably inserted into the locking seat, and the open end of the locking seat is provided with an RFID code chip.

[0018] In some embodiments, the lock housing has a receiving groove for accommodating the handle, and the ring main unit lock further includes a top cover, which is movably connected to the lock housing and covers the receiving groove of the lock housing.

[0019] The technical solution provided by this utility model has the following advantages and effects:

[0020] This ring main unit lock features a bolt elastically positioned within the lock housing. A locking element is detachably connected to the lock housing, and when installed, it abuts against the bolt and restricts its retraction. Even when not installed, during locking, pressing down the handle moves the stop from one side of the bolt to the other, causing it to retract relative to the lock housing. The bolt then springs back, preventing the stop from rising and locking it. This allows for keyless locking, or key-only locking. When the locking element is installed, it abuts against the bolt and restricts its retraction, fixing the bolt in place. Locking is then performed by inserting a key into the lock cylinder to change the stop's position. Therefore, this ring main unit lock can be locked without a key or switched to key-only locking, improving operational convenience. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the lock for the ring main unit according to an embodiment of this utility model;

[0022] Figure 2 This is an exploded structural diagram of the ring main unit lock according to an embodiment of the present utility model;

[0023] Figure 3 This is a longitudinal cross-sectional structural diagram of a partial structure of the lock of the ring main unit according to an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the ring main unit lock according to an embodiment of the present utility model, in which the locking component is not assembled to the lock shell and the lock tongue is in a free state;

[0025] Figure 5 This is a schematic diagram of the ring main unit lock according to an embodiment of the present invention, showing the locking component assembled on the lock housing and the lock tongue in a fixed state.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Ring main unit locks;

[0028] 1. Lock housing; 11. Fixed base; 12. Locking base; 121. RFID chip; 13. Through hole; 2. Handle; 3. Lock cylinder; 31. Limiting post; 311. Second limiting hole; 4. Lock tongue; 41. Guide slope; 42. Step structure; 43. Elastic element; 5. Locking element; 6. Stop; 61. Body; 62. Protrusion; 621. Inclined surface; 7. Pin; 8. Torsion spring device; 9. Top cover. Detailed Implementation

[0029] To facilitate understanding of this utility model, the specific embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.

[0030] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0031] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0032] It should be noted that in this article, "fixed to" or "connected to" can mean directly fixed to or connected to a component, or indirectly fixed to or connected to a component.

[0033] This utility model embodiment provides a ring main unit lock 100, such as Figures 1 to 5 As shown, the ring main unit lock 100 includes a lock housing 1, a handle 2, a lock cylinder 3, a lock tongue 4, and a locking component 5.

[0034] The handle 2 is movably connected to the lock housing 1, and the lock cylinder 3 is disposed on the handle 2. Specifically, the key is inserted into the lock cylinder 3, and the lock cylinder 3 is turned to unlock. After unlocking, the handle 2 can be turned to open the ring network cabinet door.

[0035] The lock cylinder 3 is provided with a stop 6, and the lock tongue 4 is elastically disposed inside the lock shell 1.

[0036] The stop 6 has a first position, a second position, and a third position. In the first position, the stop 6 abuts against the first side of the latch 4 near the handle 2. In the second position, the stop 6 abuts against the second side of the latch 4 away from the handle 2. In the third position, the stop 6 is offset from the latch 4. The locking member 5 is detachably connected to the lock housing 1. When the locking member 5 is assembled on the lock housing 1, the locking member 5 abuts against the latch 4 to restrict the latch 4 from retracting. Specifically, because the latch 4 is elastic, when the stop 6 moves from the first position to the second position, that is, from the first side of the latch 4 near the handle 2 to the second side away from the handle 2, the stop 6 acts on the latch 4 to cause the latch 4 to retract relative to the lock housing 1. When the stop 6 is located on the second side of the latch 4, the latch 4 can prevent the stop 6 from moving towards the first side to form a locked state. The first and second sides of the latch 4 are defined according to the spatial relative position of the latch 4 to the handle 2. Specifically, in this embodiment, the handle 2 is located at the top of the lock housing 1 and in the area above the latch 4. Therefore, the first side of the latch 4 is the top of the latch 4, and the second side of the latch 4 is the bottom of the latch 4. That is, when the stop 6 moves from the top to the bottom of the latch 4, the stop 6 acts on the latch 4 to make the latch 4 retract relative to the lock housing 1. It should be noted that the stop 6 can only make the latch 4 retract when it moves from the top to the bottom of the latch 4. When it moves in the opposite direction, the latch 4 cannot retract, so that the stop 6 is in a locked state when it abuts against the bottom of the latch 4. The locking member 5 is detachably connected to the lock housing 1. The two can be connected by threads, pins, snaps, etc., without any special restrictions. When the locking member 5 is assembled to the lock housing 1, the locking member 5 abuts against the latch 4 and restricts the retraction of the latch 4.

[0037] Understandably, when the locking member 5 is not assembled to the lock housing 1, the bolt 4 has a certain amount of room to move due to its own elasticity. Therefore, when the stop member 6 is in the first position, i.e., located on the first side of the bolt 4, applying an external force to the stop member 6 causes the bolt 4 to retract relative to the lock housing 1. When the two are no longer in contact, the bolt 4 rebounds under its own elasticity, and the stop member 6 moves to the second position, i.e., located on the second side of the bolt 4. At this time, the bolt 4 blocks the rise of the stop member 6 to lock the stop member 6, thus achieving locking. This structure allows for direct locking without a key. However, when the locking member 5 is assembled to the lock housing 1, the bolt 4 is restricted by the locking member 5 and cannot retract under its own elasticity. Therefore, even if an external force is applied to the stop member 6, the bolt 4 cannot retract. In this case, locking can only be performed using a key. When the lock cylinder 3 is inserted and turned by the key, it causes the stop 6 to move to the second or third position. When the stop 6 is in the second position, it blocks the bolt 4 to form a locked state. When the stop 6 is in the third position, it is offset from the bolt 4 to form an unlocked state.

[0038] Specifically, the ring main unit lock 100 has two locking methods. The locking element 5 is detachably connected to the lock housing 1. When the locking element 5 is not installed on the lock housing 1, locking can be performed directly without a key (hereinafter referred to as direct locking for ease of understanding), or it can be switched to key-only locking (hereinafter referred to as indirect locking). That is, when the locking element 5 is installed on the lock housing 1, locking can only be performed with a key. Therefore, both direct and indirect locking can be satisfied simultaneously. The direct and indirect locking methods are described in detail below:

[0039] Direct locking:

[0040] When switching to direct locking mode is required, the locking element 5 is not assembled on the lock shell 1. Insert the key into the lock cylinder 3 and turn it to unlock, causing the stop 6 to move from the second position to the third position. At this time, the stop 6 is offset from the bolt 4 and thus disengages from the bolt 4. It is now in the unlocked state, and the handle 2 protrudes from the lock shell 1. At this time, the stop 6 moves from the second side of the bolt 4 away from the handle 2 to the first side close to the handle 2 under the action of the handle 2. Turning the handle 2 can open the ring network cabinet door. After unlocking, the key can be turned to reset and removed. The stop 6 returns to the first position, that is, the stop 6 is now located on the first side of the bolt 4. When locking, no key is required. The handle 2 can be pressed down directly, which moves the stop 6 from the first position to the second position of the bolt 4. The stop 6 acts on the bolt 4 to make the bolt 4 retract relative to the lock case 1. Then, the bolt 4 rebounds under its own elasticity. The stop 6 abuts against the second side of the bolt 4 away from the handle 2. The bolt 4 blocks the rise of the stop 6 to lock the stop 6 and complete the locking.

[0041] Indirect locking:

[0042] When it is necessary to switch to indirect locking, the locking member 5 is assembled onto the lock housing 1. At this time, the locking member 5 abuts against the bolt 4 and restricts the bolt 4 from moving backward. The bolt 4 is fixed, and the unlocking steps are the same as the unlocking steps of the direct locking described above.

[0043] When locking is required: insert the key into the lock cylinder 3 and rotate it to move the stop 6 to the third position. Then press down the handle 2 and rotate the key to rotate the stop 6 to the first position. At this time, the stop 6 is located on the second side of the bolt 4. The bolt 4 blocks the movement of the stop 6 to form a locked state.

[0044] Therefore, the ring main unit lock 100 is elastically set inside the lock housing 1 via the locking tongue 4, and is detachably connected to the lock housing 1 via the locking member 5. When the locking member 5 is assembled with the lock housing 1, the locking member 5 abuts against the locking tongue 4 and restricts the retraction of the locking tongue 4. This structure allows the locking member 5 to be used when the lock housing 1 is not assembled, so that when locking, by directly pressing down the handle 2, the stop 6 moves from the first side to the second side of the locking tongue 4. The stop 6 acts on the locking tongue 4, causing the locking tongue 4 to retract relative to the lock housing 1. The latch 4 rebounds under its own elasticity, blocking the rise of the stop 6 to lock the stop 6, thus enabling direct locking without a key. It can also be switched to lockable only by a key, that is, by assembling the locking member 5 into the lock housing 1. At this time, the locking member 5 abuts against the latch 4 and restricts the retraction of the latch 4, and the latch 4 is fixed. At this time, the locking operation can only be performed by changing the position of the stop 6 by a key. Therefore, the ring main unit lock 100 can be locked directly without a key or switched to lockable only by a key, improving the convenience of operation.

[0045] In some embodiments, such as Figure 3 As shown, the latch 4 has a guide slope 41 on the first side near the handle 2. The stop 6 acts on the guide slope 41 of the latch 4 under external force to make the latch 4 retract relative to the lock housing 1. Understandably, when the locking member 5 is not assembled to the lock housing 1, the latch 4 has a certain amount of room to move due to its own elasticity. Therefore, when the stop 6 is above the guide slope 41 of the latch 4, i.e., on the first side of the latch 4, applying external force to the stop 6 causes the force of the stop 6 to act on the guide slope 41 of the latch 4, making the latch 4 retract relative to the lock housing 1. When the two are no longer in contact, the latch 4 rebounds under its own elasticity. At this time, the stop 6 is below the latch 4, i.e., on the second side of the latch 4. The latch 4 blocks the rise of the stop 6 to lock the stop 6, thus achieving locking. This structure allows for direct locking without a key.

[0046] In some embodiments, such as Figure 4 and Figure 5 As shown, the latch 4 has a stepped structure 42 on its second side away from the handle 2. The lock housing 1 has a through hole 13 communicating with the stepped structure 42. The locking member 5 passes through the through hole 13 and abuts against the stepped surface of the stepped structure 42 to restrict the backward movement of the latch 4. In this embodiment, the stepped structure 42 of the latch 4 is one or more protruding levels or platforms at the bottom of the latch 4, thus forming stepped surfaces of different heights. The locking member 5, such as a bolt or pin, can pass through the through hole 13 on the lock housing 1, where the through hole 13 is formed at the bottom of the lock housing 1. This allows the locking member 5 to pass through the through hole 13 from the bottom of the lock housing 1 and directly abut against the stepped surface of the stepped structure 42 to restrict the backward movement of the latch 4, thereby achieving the locking function of the latch 4. Therefore, by moving the locking member 5 away from the contact with the stepped surface, the latch 4 can be easily released, providing good security and stability. Specifically, in this embodiment, the locking member 5 is threadedly connected to the through hole 13. Understandably, the detachable structure of the threaded connection between the locking element 5 and the through hole 13 allows for easy assembly and disassembly by rotating the locking element 5, while maintaining a stable connection and offering simple and convenient operation. Furthermore, the locking element 5 can be provided in one or more configurations, with the number of through holes 13 corresponding to effectively lock the locking tongue 4; no particular limitation is imposed here.

[0047] In some embodiments, such as Figure 4As shown, the stop 6 includes a body 61 and a protrusion 62 connected to the body 61. The body 61 is connected to the lock cylinder 3. The protrusion 62 protrudes from the side wall of the lock cylinder 3. The side of the protrusion 62 adjacent to the latch 4 is an inclined surface 621 adapted to the guide slope 41. Specifically, the guide slope 41 of the latch 4 is inclined downwards towards the outside of the latch 4, and the inclined surface 621 of the protrusion 62 is inclined upwards towards the outside of the protrusion 62, so that the two are adapted to each other. The main body 61 and the protrusion 62 can be an integrally formed structure or a separate connected structure, without any particular limitation. By setting the protrusion 62 to protrude from the side wall of the lock cylinder 3, when the lock cylinder 3 is turned by inserting the key, the protrusion 62 can be driven to rotate to the bottom of the bolt 4 or rotate to a state that is offset from the bolt 4 to form a locked or unlocked state. This ensures that there is no structural interference between the lock cylinder 3 and the bolt 4. Furthermore, the inclined surface 621 of the protrusion 62 applies a force to the guide inclined surface 41 above the bolt 4, causing the bolt 4 to move backward relative to the bolt, which can improve the smoothness of sliding between the two. This allows the stop 6 to smoothly push the bolt 4 backward until the protrusion 62 moves from the top of the bolt 4 to the bottom of the bolt 4 for locking.

[0048] In some embodiments, the protrusions 62 are provided on both opposite sides of the body 61, meaning that both opposite sides of the body 61 protrude from the sidewall of the lock cylinder 3, while the other two sides adjacent to the protrusions 62 do not protrude from the sidewall of the lock cylinder 3. This makes the stop member 6 approximately boat-shaped, so that when the lock cylinder 3 drives the protrusions 62 to rotate a certain angle and deviate from the bolt 4, it is in the unlocked state. The symmetrical arrangement of the structure with protrusions 62 on both opposite sides of the body 61 can enhance structural stability and strength. Of course, in other embodiments, the protrusions 62 may only be provided on one side of the body 61, and there is no particular limitation here.

[0049] In some embodiments, such as Figure 3 and Figure 4As shown, the lock housing 1 is provided with a fixed base 11, the fixed base 11 has a receiving cavity, the lock tongue 4 is disposed in the receiving cavity along the first direction by an elastic member 43, and the lock tongue 4 is partially exposed outside the fixed base 11 when it is in the normal state. The inclined surface 621 of the protrusion 62 acts on the guide inclined surface 41 of the lock tongue 4 along the second direction under the action of external force, so that the lock tongue 4 retracts into the receiving cavity along the first direction. The first direction and the second direction intersect. Specifically, in this embodiment, the latch 4 is horizontally disposed within the lock housing 1. Under the action of the elastic element 43, it reciprocates in the horizontal direction. The stop 6, under the control of the handle 2 pressing down, moves downwards in the vertical direction of the lock housing 1. This causes the stop 6 to act on the guide slope 41 of the latch 4, causing the latch 4 to retract laterally into the receiving cavity. When the latch 4 rebounds and blocks the stop 6, the elastic direction of the latch 4 and the pressing direction of the stop 6 are not the same. This makes it difficult to overcome the elasticity of the latch 4 and allow the stop 6 to disengage and be pulled out when the latch 4 is not in the unlocked state, even with external force applied to the handle 2. This effectively improves the security of the locked state. Specifically, the elastic element 43 can be a spring, and the number of elastic elements 43 can be one or more, as long as the latch 4 is subjected to uniform force and moves smoothly within the receiving cavity. No particular limitation is made here. Specifically, the locking member 5 passes through the bottom of the lock housing 1 and the bottom of the fixed base 11 in sequence and abuts against the stepped structure 42 of the lock tongue 4.

[0050] In some embodiments, such as Figure 4 As shown, the body 61 has a first limiting hole, the end of the lock cylinder 3 is provided with a limiting post 31, and the limiting post 31 has a second limiting hole 311. The limiting post 31 is inserted into the first limiting hole, and the second limiting hole 311 is exposed on the side of the stop 6 away from the lock cylinder 3. The body 61 is inserted into the second limiting hole 311 by a pin 7 to lock it onto the lock cylinder 3. Specifically, the main body 61 has a first limiting hole in the shape of a D-shape at its center along its axial direction. The limiting post 31 is adapted to the shape of the first limiting hole and is set as a D-shaped column. This allows the main body 61 to be fixed in position relative to the lock cylinder 3 when the limiting post 31 is inserted into the first limiting hole of the main body 61, preventing positional displacement of the two under external force. Furthermore, by forming a second limiting hole 311 on the limiting post 31, specifically along the radial direction of the limiting post 31, and by inserting a pin 7 into the second limiting hole 311, the main body 61 can be stably locked onto the lock cylinder 3, and disassembly is convenient. Since the stop 6 bears most of the force, it is prone to damage or wear, so it is designed as a detachable structure for easy replacement or maintenance. Of course, in other embodiments, the main body 61 can also be fixedly connected to the lock cylinder 3, or be integrally formed, without particular limitation.

[0051] In some embodiments, such as Figure 3 As shown, the handle 2 is rotatably mounted on the lock housing 1, and the handle 2 and the lock housing 1 are connected by a torsion spring device 8. Specifically, the lock housing 1 is provided with a rotating shaft, which can rotate freely relative to its own axial direction. The end of the handle 2 is connected to the rotating shaft through the torsion spring device 8, wherein the torsion spring device 8 includes a torsion spring and a fixing pin. A mounting groove adapted to one end of the handle 2 is provided at one end of the rotating shaft, and pin holes are provided on the end of the handle 2 and the side wall of the mounting groove, respectively. The end of the handle 2 is rotatably mounted on the rotating shaft by passing through the pin hole and the torsion spring through the fixing pin. When the stop 6 is offset from the lock tongue 4 and thus disengaged from the lock tongue 4 and is in the unlocked state, the handle 2 pops out under the action of the torsion spring device 8. Rotating the handle 2 can open the ring main cabinet door, while locking is performed by elastically pressing down the handle 2.

[0052] In some embodiments, such as Figure 3 As shown, the lock housing 1 is provided with a locking seat 12 with an open end. The lock cylinder 3 is rotatably inserted into the locking seat 12, and the open end of the locking seat 12 is provided with an RFID code 121. When the computer key is inserted into the lock cylinder 3, it is first authenticated by RFID reading. Only after successful authentication can the lock cylinder 3 be rotated to perform the locking and unlocking operation, effectively improving security performance.

[0053] In some embodiments, such as Figure 3 As shown, the lock housing 1 has a receiving groove for accommodating the handle 2. The ring main unit lock 100 also includes an upper cover 9, which is movably connected to the lock housing 1 and covers the receiving groove of the lock housing 1. Specifically, the lock housing 1 is provided with a rotatable rotating shaft, and one end of the upper cover 9 is provided with a rotating hole. The upper cover 9 is inserted into the rotating shaft through the rotating hole to be rotatably connected to the lock housing 1. The upper cover 9, which rotates with the lock housing 1, can rotate around the lock housing 1, thereby covering the lock housing 1 as a whole to form a good protective function. Of course, in other embodiments, the upper cover 9 and the lock housing 1 can also be slidably connected, etc., and no particular limitation is made here.

[0054] The above embodiments are not an exhaustive list based on the present invention, and there may be other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A lock for a ring main unit, characterized in that, The ring main unit lock includes a lock housing, handle, lock cylinder, lock tongue, and locking components; The handle is movably connected to the lock housing, the lock cylinder is disposed on the handle, and the lock cylinder is provided with a stop; the bolt is elastically disposed within the lock housing. The stop has a first position, a second position and a third position. In the first position, the stop abuts against the first side of the latch near the handle. In the second position, the stop abuts against the second side of the latch away from the handle. In the third position, the stop is offset from the latch. The locking member is detachably connected to the lock housing. When the locking member is assembled into the lock housing, it abuts against the bolt to restrict the bolt from moving backward.

2. The ring main unit lock as described in claim 1, characterized in that, The latch has a guide slope on the first side near the handle.

3. The ring main unit lock as described in claim 1, characterized in that, The second side of the latch away from the handle is provided with a stepped structure, the lock housing is provided with a through hole communicating with the stepped structure, and the locking member passes through the through hole and abuts against the stepped surface of the stepped structure to restrict the retraction of the latch.

4. The ring main unit lock as described in claim 3, characterized in that, The locking element is threadedly connected to the through hole.

5. The ring main unit lock as described in claim 2, characterized in that, The stop includes a body and a protrusion connected to the body. The body is connected to the lock cylinder. The protrusion protrudes from the side wall of the lock cylinder, and the side of the protrusion adjacent to the latch is an inclined surface adapted to the guide slope.

6. The ring main unit lock as described in claim 5, characterized in that, The lock housing is provided with a fixed base, which has a receiving cavity. The lock tongue is disposed in the receiving cavity along a first direction by an elastic element, and when the lock tongue is in a normal state, part of it is exposed outside the fixed base. Under the action of external force, the inclined surface of the protrusion acts on the guide inclined surface of the lock tongue along a second direction to make the lock tongue retract into the receiving cavity along the first direction. The first direction and the second direction intersect.

7. The ring main unit lock as described in claim 5, characterized in that, The main body has a first limiting hole, the end of the lock cylinder has a limiting post, and the limiting post has a second limiting hole. The limiting post is inserted into the first limiting hole, and the second limiting hole is exposed on the side of the stop away from the lock cylinder. The main body is inserted into the second limiting hole by a pin to lock it onto the lock cylinder.

8. The ring main unit lock as described in any one of claims 1-7, characterized in that, The handle is rotatably mounted on the lock housing, and the handle and the lock housing are connected by a torsion spring device.

9. The ring main unit lock as described in any one of claims 1-7, characterized in that, The lock housing is provided with a locking seat with an open end, the lock cylinder is rotatably inserted into the locking seat, and the open end of the locking seat is provided with an RFID code chip.

10. The ring main unit lock as described in any one of claims 1-7, characterized in that, The lock housing has a receiving groove for accommodating the handle, and the ring main unit lock also includes a top cover, which is movably connected to the lock housing and is positioned over the receiving groove of the lock housing.

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