Electric box window for preventing cable branch box from being opened by mistake

Abstract

The utility model discloses an electrical box window for preventing a cable branch box from being opened by mistake, which comprises an operation window, a cover plate is arranged on the operation window, a butt joint groove is arranged on the cover plate, a locking block is arranged on the operation window, a movable piece is arranged in the locking block, and the movable piece is connected with the butt joint groove. A limiting fulcrum abutting against the movable piece is arranged in the locking block, a displacement protruding block is placed on the side, close to the butt joint groove, of the movable piece, an unlocking channel is formed in the locking block, the unlocking channel and the displacement protruding block are located on the two sides of the limiting fulcrum respectively, and the unlocking channel is slidably connected with an unlocking piece. The unlocking piece can abut against the movable piece in a sliding mode and push the movable piece to move. The utility model provides an electrical cabinet window capable of preventing a cable branch box from being opened by mistake, which can lock a window for operating a circuit breaker, ensure safety, ensure quick unlocking, do not need to be matched with a key and a lock hole, and is better in universality and high in unlocking efficiency.

Description

Technical Field

[0001] This utility model relates to the field of branch box technology, and in particular to an electrical box window for preventing accidental opening of a cable branch box. Background Technology

[0002] For example, publication number "CN218829056U" discloses "a cable branch box," which includes a box body. Cables enter the box through cable inlet holes at the bottom and are connected to the input terminal of a disconnecting switch via copper busbars. The output terminals of the disconnecting switches are connected to the input terminals of multiple molded case circuit breakers (MCCBs). Cables from the output terminals of the MCCBs exit through multiple cable outlet holes at the bottom of the box body. Columns are symmetrically arranged along the height of the inner wall of the box, and a fixing structure for installing the disconnecting switches and MCCBs is provided between the columns. Protective components are installed on the side of the disconnecting switches and MCCBs closest to the box door. However, in practical applications, opening the entire side door of this type of box for maintenance and debugging is detrimental to the box's dust prevention effect. Therefore, windows are often installed at the locations corresponding to the circuit breakers for quick operation. However, these windows pose a risk of accidental operation of the circuit breakers by others. Summary of the Invention

[0003] In response to the problem mentioned in the background art that existing technologies allow others to accidentally open the window to operate the circuit breaker, this utility model provides an electrical box window for cable branch boxes to prevent accidental opening. The window for operating the circuit breaker can be locked to ensure safety, while also ensuring quick unlocking. It does not require keyhole adaptation, has better versatility, and high unlocking efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] An electrical box window for preventing accidental opening of a cable branch box includes an operation window with a cover plate and a mating groove. A locking block is provided on the operation window, and a movable piece is disposed within the locking block. A limiting fulcrum abuts against the movable piece is also provided within the locking block. A displacement protrusion is placed on the movable piece near the mating groove. An unlocking channel is provided within the locking block, and the unlocking channel and the displacement protrusion are located on opposite sides of the limiting fulcrum. An unlocking piece is slidably connected to the unlocking channel, and the unlocking piece can slidably abut against and push the movable piece to displacement. In existing technology, cable branch boxes without separate compartments already employ a small window on the entire box door for quick opening and closing, allowing operation of the corresponding circuit breaker inside. This avoids the need to open and close the entire box door when operating the circuit breaker, preventing impurities and dust from entering the box. However, to avoid adding a key and affecting the efficiency of operators, existing technology generally does not add a locking structure to the small window. This allows personnel other than the operator to open the small window. If a key lock is added to the small window, during numerous maintenance and debugging operations, the operation of matching, inserting, and turning the key to unlock must be repeated repeatedly, affecting work efficiency. Therefore, to address the above problems, this application sets an unlocking channel inside the locking block and sets an unlocking plate. The unlocking plate can slide within the unlocking channel, and the unlocking plate is a special unlocking tool carried by the operator. The sliding of the unlocking plate allows... The movable piece is able to abut and push the movable piece to move. The movable piece is connected to the limiting fulcrum. Since the displacement protrusion and the unlocking channel are located on both sides of the limiting fulcrum, the movable piece can lift one end and lower the other end with the limiting fulcrum as the pivot point. When the unlocking piece in the unlocking channel pushes the movable piece upward, it will drive the side of the movable piece connected to the displacement protrusion to move downward, thereby causing the displacement protrusion to move downward and separate from the docking groove. This allows the cover plate to rotate freely and open the electrical box window. Therefore, during use, the operator only needs to insert the unlocking piece into the unlocking channel and push the movable piece to separate the displacement protrusion and the limiting groove, simplifying the unlocking action. It also eliminates the need for key matching, avoiding the need for operators to carry a large number of keys. At the same time, without the aid of matching tools, other people cannot directly pull the cover plate to open the electrical box window, reducing the occurrence of accidental operation of the circuit breaker.

[0006] Preferably, there are two unlocking channels, with both ends of the movable piece located within the two channels, and the displacement protrusion placed in the middle of the movable piece. By having two unlocking channels, the two ends of the corresponding movable piece are located within the two channels, ensuring that the movable piece can only move uniformly when both unlocking channels have unlocking pieces sliding and pushing against its ends. This causes the displacement protrusion in the middle of the movable piece to move, ensuring accurate movement of the displacement protrusion and allowing the movable piece to move evenly and stably.

[0007] Preferably, the device also includes an unlocking unit comprising two unlocking plates, each rotatably connected to the unlocking unit. The two unlocking plates can respectively enter the unlocking channels and simultaneously abut against both ends of the movable plate. When the ends of the movable plate are pushed upwards, the middle position of the movable plate sinks. By providing two unlocking plates rotatably connected to the unlocking unit, the unlocking plates can be separated and aligned with the two unlocking channels respectively. When the worker pushes the unlocking unit to move as a whole, the two unlocking plates can respectively push the movable plates within the two unlocking channels, thereby causing the central displacement protrusion to move. This reduces the risk of others directly unlocking the device using a plate-like tool, while still ensuring the convenience of unlocking for the worker—simply pushing in the unlocking plates completes the unlocking process.

[0008] Preferably, a separating cone is provided between the two unlocking channels, and a central channel connecting each unlocking channel is provided within the locking block. The separating cone is positioned towards the central channel, and the unlocking channels are inclined in a "Y" shape relative to the central channel. The separating cone between the unlocking channels separates the two unlocking pieces, allowing each piece to enter its corresponding unlocking channel. This enables the unlocking pieces to synchronously unlock symmetrically when the unlocking unit moves. Therefore, by setting the unlocking channels in a "Y" shape, it is impossible to directly and precisely align the two piece-shaped units with the unlocking channels for synchronous unlocking without using a dedicated unlocking unit.

[0009] Preferably, the two unlocking pieces are provided with opposing guide surfaces at their ends. When the two unlocking pieces are attached, a separation gap is formed between the guide surfaces. The guide surfaces on the unlocking pieces are positioned opposite each other and are generally inclined or curved surfaces. Therefore, when the two unlocking pieces are attached together, a separation gap is formed between them, allowing the separation cone to more easily align with the gap, improving the smoothness of the unlocking piece separation and preventing interference or jamming during use.

[0010] Preferably, the two unlocking tabs include opposing magnetic surfaces. These magnetic surfaces allow the two unlocking tabs to adhere to each other, ensuring they remain in contact with the separating cone before entering the intermediate channel. After the two unlocking tabs come into contact with the separating cone, a pushing force from the operator, combined with the separating cone's resistance to the magnetic attraction between the two unlocking tabs, separates them.

[0011] Preferably, the movable piece is an elastic piece. By making the movable piece elastic, when both ends of the movable piece are pushed and squeezed upwards, the middle area of ​​the movable piece can be depressed downwards, allowing the movable protrusion on the middle area of ​​the movable piece to sink synchronously. After the unlocking piece disengages from the unlocking channel, the movable piece, relying on its own elasticity, can retract, thereby causing the movable protrusion on the middle area to rise, allowing the movable protrusion to re-engage with the mating groove.

[0012] Preferably, the end of the unlocking piece away from the displacement protrusion is connected to a finger ring, and the unlocking piece is rotatably connected to the finger ring. The unlocking unit includes a finger ring, wherein the finger ring and the unlocking piece are rotatably connected. Through the rotatable connection of the unlocking piece, the unlocking piece can adapt to the extension direction of the unlocking channel, and the finger ring can be directly slipped on the operator's finger for convenient unlocking operation.

[0013] Preferably, a mounting block is rotatably connected to the ring, and the unlocking plate is rotatably connected to the mounting block. The rotation axis of the mounting block relative to the ring is perpendicular to the rotation axis of the unlocking plate relative to the mounting block. By connecting the mounting block to the ring and rotatably connecting the unlocking plate through the mounting block, and by creating a rotatable connection between the mounting block and the ring, the ring and the unlocking plate can rotate in different directions, thus better adapting to the operating habits of staff.

[0014] Preferably, the locking block is provided with a moving groove, which includes a settling groove located below the limiting fulcrum and a limiting groove located above the limiting fulcrum. The moving groove within the locking block is used to limit the movement of the displacement protrusion. The moving groove includes a settling groove and a limiting groove, with the settling groove located below the limiting groove. The shape and size of the settling groove are sufficient to accommodate the settling of the displacement protrusion, while the limiting groove fits against the side of the displacement protrusion, thereby limiting the movement of the displacement protrusion and preventing it from shifting. This ensures that even when the displacement protrusion partially moves into the settling groove, it remains contained by the limiting groove, guaranteeing stability.

[0015] The beneficial effects of this utility model are as follows:

[0016] (1) It can lock the window for operating the circuit breaker to ensure safety, while also ensuring fast unlocking. It does not require keyhole adaptation, has better versatility, and high unlocking efficiency.

[0017] (2) It can increase the difficulty for staff to misunderstand the lock while ensuring that the staff can quickly unlock the electrical box window;

[0018] (3) It allows staff to easily operate the unlocking unit and make multi-angle adjustments. Attached Figure Description

[0019] Figure 1 This is a cross-sectional axonometric view of the present invention.

[0020] Figure 2 This is an isometric drawing of this utility model.

[0021] Figure 3 yes Figure 1 A magnified view of a portion of point A in the middle.

[0022] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle.

[0023] In the picture:

[0024] 1. Operation window;

[0025] 2 cover plates, 21 mating grooves;

[0026] 3 Locking block, 31 Movable piece, 32 Limiting fulcrum, 33 Displacement protrusion, 34 Unlocking channel, 35 Separation cone, 36 Middle channel, 37 Moving groove, 371 Settling groove, 372 Limiting groove.

[0027] 4. Unlocking unit, 41. Unlocking piece, 42. Guide surface, 43. Separation notch, 44. Finger ring, 45. Mounting block. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1:

[0030] like Figure 1 , 2As shown in Figures 3 and 4, an electrical box window for preventing accidental opening of a cable branch box includes an operation window 1, a cover plate 2 on the operation window 1, a mating groove 21 on the cover plate 2, a locking block 3 on the operation window 1, a movable piece 31 inside the locking block 3, a limiting fulcrum 32 inside the locking block 3 that abuts against the movable piece 31, a displacement protrusion 33 placed on the side of the movable piece 31 near the mating groove 21, an unlocking channel 34 inside the locking block 3, the unlocking channel 34 and the displacement protrusion 33 being located on both sides of the limiting fulcrum 32, and an unlocking piece 41 slidably connected to the unlocking channel 34, the unlocking piece 41 being able to slide against and push the movable piece 31 to displacement. In existing technology, cable branch boxes without separate compartments already employ a small window on the entire box door for quick opening and closing, allowing operation of the corresponding circuit breaker inside. This avoids the need to open and close the entire box door when operating the circuit breaker, preventing impurities and dust from entering the box. However, to avoid adding a key and affecting the efficiency of operators, existing technology generally does not add a locking structure to the small window. This allows personnel other than the operator to open the small window. If a key lock is added to the small window, during numerous maintenance and debugging operations, the operation of matching, inserting, and turning the key to unlock must be repeated repeatedly, affecting work efficiency. Therefore, to address the above problems, this application provides an unlocking channel 34 inside the locking block 3 and an unlocking piece 41. The unlocking piece 41 can slide within the unlocking channel 34. The unlocking piece 41 is a special unlocking tool carried by the operator. By sliding the unlocking piece 41, it can abut against and push the movable piece 31. The movable piece 31 is connected to the limiting fulcrum 32. Since the displacement protrusion 33 and the unlocking channel 34 are located on both sides of the limiting fulcrum 32, the movable piece 31 can lift one end and lower the other end with the limiting fulcrum 32 as the pivot point. When the unlocking piece 41 in the unlocking channel 34 pushes the movable piece 31 upward, it will drive the side of the movable piece 31 connected to the displacement protrusion 33 to move downward, thereby causing the displacement protrusion 33 to move downward and separate from the docking groove 21, so that the cover plate 2 can rotate freely and realize the opening of the electrical box window. Therefore, during use, the staff only needs to insert the unlocking piece 41 into the unlocking channel 34 and push the movable piece 31 to separate the displacement protrusion 33 and the limiting groove, which simplifies the unlocking action and eliminates the need for key matching steps, avoiding the need for staff to carry a large number of keys. At the same time, without the aid of matching tools, other people cannot directly pull the cover plate 2 to open the electrical box window, reducing the occurrence of accidental operation of the circuit breaker.

[0031] like Figure 3 , 4As shown, there are two unlocking channels 34, with the two ends of the movable piece 31 located within the two unlocking channels 34 respectively, and the displacement protrusion 33 placed in the middle of the movable piece 31. By setting two unlocking channels 34, the two ends of the corresponding movable piece 31 are located within the two unlocking channels 34 respectively. This ensures that the movable piece 31 can only move uniformly when both unlocking channels 34 have unlocking pieces 41 sliding and pushing the two ends of the movable piece 31, causing the displacement protrusion 33 in the middle of the movable piece 31 to move. This ensures that the movement of the displacement protrusion 33 is accurate, allowing the movable piece 31 to move uniformly and stably.

[0032] like Figure 3 , 4 As shown, it also includes an unlocking unit 4, which includes two unlocking pieces 41. Each unlocking piece 41 is rotatably connected to the unlocking unit 4. The two unlocking pieces 41 can respectively enter the unlocking channel 34 and simultaneously abut against both ends of the movable piece 31. When both ends of the movable piece 31 are pushed upwards, the middle position of the movable piece 31 sinks. By providing two unlocking pieces 41 rotatably connected to the unlocking unit 4, the unlocking pieces 41 can be separated and aligned with the two unlocking channels 34 respectively. When the operator pushes the unlocking unit 4 to move as a whole, the two unlocking pieces 41 can respectively push the movable piece 31 within the two unlocking channels 34, thereby causing the middle displacement protrusion 33 to move. This reduces the risk of others directly unlocking with a piece-shaped tool while still ensuring the convenience of unlocking for the operator; simply pushing in the unlocking piece 41 completes the unlocking process.

[0033] like Figure 3 , 4 As shown, a separating cone 35 is provided between the two unlocking channels 34, and a middle channel 36 connecting each unlocking channel 34 is provided in the locking block 3. The separating cone 35 is positioned towards the middle channel 36, and the unlocking channels 34 are inclined in a "Y" shape relative to the middle channel 36. The separating cone 35 can separate the two unlocking pieces 41, allowing the two pieces to enter the corresponding unlocking channels 34 respectively. This allows the unlocking pieces 41 to be symmetrically unlocked when the unlocking unit 4 moves. Therefore, the unlocking channels 34 are set in a "Y" shape, making it impossible to directly and precisely match the two piece-shaped units to the unlocking channels 34 for synchronous unlocking without using a dedicated unlocking unit 4.

[0034] like Figure 3 , 4As shown, the ends of the two unlocking pieces 41 are provided with opposing guide surfaces 42. When the two unlocking pieces 41 are attached, a separation gap 43 is formed between the guide surfaces 42. The guide surfaces 42 are provided on the unlocking pieces 41, and the guide surfaces 42 are arranged opposite each other. The guide surfaces 42 are generally inclined or curved surfaces. Therefore, when the two unlocking pieces 41 are attached together, a separation gap 43 can be formed between the unlocking pieces 41. This allows the separation cone 35 to more easily align with the separation gap 43, improving the smoothness of the unlocking piece separation and avoiding interference and jamming of the unlocking piece 41 during use.

[0035] like Figure 3 , 4 As shown, the two unlocking pieces 41 include opposing magnetic surfaces. These magnetic surfaces allow the two unlocking pieces 41 to adhere to each other, ensuring they remain in contact with the separating cone 35 before entering the intermediate channel 36. After the two unlocking pieces 41 come into contact with the separating cone 35, the worker applies a pushing force to overcome the magnetic attraction between the two unlocking pieces 41, thus separating them.

[0036] like Figure 3 , 4 As shown, the movable piece 31 is an elastic piece. By making the movable piece 31 an elastic piece, when both ends of the movable piece 31 are pushed and squeezed upwards, the middle area of ​​the movable piece 31 can be concave downwards, thereby allowing the movable protrusion on the middle area of ​​the movable piece 31 to sink synchronously. After the unlocking piece 41 disengages from the unlocking channel 34, the movable piece 31 can retract due to its own elasticity, thereby driving the movable protrusion on the middle area to rise, so that the movable protrusion can re-engage with the docking groove 21.

[0037] like Figure 3 , 4 As shown, the end of the unlocking piece 41 furthest from the displacement protrusion is connected to a ring 44, and the unlocking piece 41 is rotatably connected to the ring 44. The unlocking unit 4 includes a ring 44, wherein the ring 44 and the unlocking piece 41 are rotatably connected. Through the rotatable connection of the unlocking piece 41, the unlocking piece 41 can be adapted to the extension direction of the unlocking channel 34, and the ring 44 can be directly fitted onto the operator's finger, making it convenient for the operator to operate and unlock.

[0038] like Figure 3 , 4As shown, a mounting block 45 is rotatably connected to the ring 44, and an unlocking piece 41 is rotatably connected to the mounting block 45. The rotation axis of the mounting block 45 relative to the ring 44 is perpendicular to the rotation axis of the unlocking piece 41 relative to the mounting block 45. By connecting the mounting block 45 to the ring 44 and rotatably connecting the unlocking piece 41 through the mounting block 45, the ring 44 and the unlocking piece 41 can rotate in different directions, thus better adapting to the operating habits of the staff.

[0039] like Figure 3 , 4 As shown, the locking block 3 is provided with a moving groove 37. The moving groove 37 includes a settling groove 371 located below the limiting fulcrum 32 and a limiting groove 372 located above the limiting fulcrum 32. The moving groove 37 is used to limit the movement of the displacement protrusion 33. The moving groove 37 includes a settling groove 371 and a limiting groove 372. The settling groove 371 is located below the limiting groove 372. The shape and size of the settling groove 371 can accommodate the settling of the displacement protrusion 33. The limiting groove 372 fits against the side of the displacement protrusion 33, thereby limiting the movement of the displacement protrusion 33 and preventing the displacement protrusion 33 from shifting. When the displacement protrusion 33 partially moves into the settling groove 371, the displacement protrusion 33 can still be limited by the limiting groove 372 to ensure stability.

[0040] The specific structure and operation steps of the electrical box window for preventing accidental opening of the cable branch box in this embodiment are as follows: In this embodiment, a locking block 3 is fixedly connected below the operation window 1 of the box. The fixing connection method of the locking block 3 includes, but is not limited to, welding and bolt connection. When the locking block 3 is not connected to the operation window 1, it is a split structure, that is, the left and right sides of the locking block 3 are set separately, which facilitates the processing of the internal unlocking channel 34, separation cone 35 and other structures. After the split locking block 3 is processed, it can be connected by welding or bolt connection. Two unlocking channels 34 and a middle channel 36 are arranged in a Y shape in the locking block 3. The unlocking channels 34 are set above the middle channel 36, and the two unlocking channels 34 are connected to the middle channel 36. The middle channel 36 of the locking channel 34 is larger, allowing the unlocking piece 41 to rotate and separate between the middle channel 36 and the unlocking channel 34 without interfering with the sides. A moving groove 37 is designed in the middle of the two unlocking channels 34, and a displacement protrusion 33 is provided inside the moving groove 37. The moving groove 37 is provided with a limiting fulcrum 32 on both sides of the moving groove 37. In this embodiment, the limiting fulcrum 32 is actually a through hole on the side wall of the moving groove 37. The movable piece 31 can pass through the through hole, and after passing through the through hole, both ends of the movable piece 31 are exposed in the unlocking channel 34. The displacement protrusion 33 is slidably connected in the moving groove 37, and the lower end of the displacement protrusion 33 has a V-shaped structure, so that the displacement protrusion 33 can move into the settling groove 371.In this embodiment, the unlocking unit 4 is provided with two unlocking pieces 41, which can rotate relative to the mounting block 45. A ring 44 is provided at the bottom of the mounting block 45, which can also rotate relative to the mounting block 45. A guide surface 42 is provided at the end of each unlocking piece 41 away from the mounting block 45. In this embodiment, the guide surface 42 is an inclined surface. The two guide surfaces 42 are positioned opposite each other, forming a V-shaped separation notch 43 between them. A separation cone 35 is provided at the bottom of the moving groove 37. When the two unlocking pieces 41 are displaced to the position of the separation cone 35, the unlocking pieces 41 can be pushed by the separation cone 35 and thus separate along the inclined surface of the separation cone 35. During use, since the movable piece 31 is an elastic piece, its initial state is a flattened state. Therefore, when the unlocking piece 41 is not placed in the unlocking channel 34, the movable piece 31 drives the displacement protrusion 33 to rise, causing the displacement... The protrusion 33 aligns with the docking groove 21, causing the cover plate 2 to be positioned on the operating window 1. When the operator needs to open the cover plate 2, the two mating unlocking pieces 41 are inserted into the middle channel 36 via the unlocking unit 4. When the two magnetically mating unlocking pieces 41 move to abut the separation cone 35, the unlocking unit 4 continues to move, allowing the separation cone 35 to guide the two unlocking pieces 41 to different unlocking channels 34. When the unlocking piece 41 contacts the end of the corresponding movable piece 31 in the unlocking channel 34, it can cause both ends of the movable piece 31 to lift up. Due to the constraint of the two limiting fulcrums 32, the middle part of the movable piece 31 sinks down. After losing support, the displacement protrusion 33 will sink into the settling groove 371, thereby separating the displacement protrusion 33 from the docking groove 21. This allows the cover plate 2 to be free from the limiting constraint and rotate freely relative to the operating window 1.

Claims

1. An electrical box window for preventing accidental opening of a cable branch box, characterized in that, The device includes an operation window with a cover plate and a mating groove. A locking block is located on the operation window, and a movable piece is disposed within the locking block. A limiting fulcrum abuts against the movable piece within the locking block. A displacement protrusion is placed on the movable piece near the mating groove. An unlocking channel is located within the locking block, with the unlocking channel and displacement protrusion located on either side of the limiting fulcrum. An unlocking piece is slidably connected to the unlocking channel, and the unlocking piece can slide against and push the movable piece to displacement.

2. The electrical box window for preventing accidental opening of a cable branch box as described in claim 1, characterized in that, The unlocking channel is provided in two ways, with the two ends of the movable piece located in the two unlocking channels respectively, and the displacement protrusion placed in the middle of the movable piece.

3. The electrical box window for preventing accidental opening of a cable branch box as described in claim 2, characterized in that, It also includes an unlocking unit, which includes two unlocking plates, each of which is rotatably connected to the unlocking unit. The two unlocking plates can enter the unlocking channel and simultaneously abut against both ends of the movable plate. When the ends of the movable plate are pushed upward, the middle position of the movable plate sinks.

4. The electrical box window for preventing accidental opening of a cable branch box as described in claim 3, characterized in that, A separation cone is provided between the two unlocking channels, and a middle channel connecting each unlocking channel is provided inside the locking block. The separation cone is positioned towards the middle channel, and the unlocking channels are inclined in a "Y" shape relative to the middle channel.

5. The electrical box window for preventing accidental opening of a cable branch box as described in claim 4, characterized in that, The two unlocking pieces are provided with opposing guide surfaces at their ends. When the two unlocking pieces are attached, a separation notch is formed between the guide surfaces.

6. The electrical box window for preventing accidental opening of a cable branch box as described in claim 4, characterized in that, The two unlocking pieces include magnetically attached surfaces that are positioned opposite each other.

7. An electrical box window for preventing accidental opening of a cable branch box according to any one of claims 2-6, characterized in that, The movable piece is an elastic piece.

8. An electrical box window for preventing accidental opening of a cable branch box according to any one of claims 1-6, characterized in that, The end of the unlocking piece away from the displacement protrusion is connected to a ring, and the unlocking piece is rotatably connected to the ring.

9. The electrical box window for preventing accidental opening of a cable branch box as described in claim 8, characterized in that, A mounting block is rotatably connected to the ring, and the unlocking piece is rotatably connected to the mounting block. The rotation axis of the mounting block relative to the ring is perpendicular to the rotation axis of the unlocking piece relative to the mounting block.

10. An electrical box window for preventing accidental opening of a cable branch box according to any one of claims 1-6, characterized in that, The locking block is provided with a moving groove, which includes a settling groove located below the limiting fulcrum and a limiting groove located above the limiting fulcrum.

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