Self-locking electric meter box

Abstract

A self-locking electric meter box comprises a box body and a box door, and a self-locking assembly which has a preset shape and can retract after being extruded is arranged on the inner end face of one end, away from a hinged end, of the box door. A lock hole which is used in cooperation with the self-locking assembly and enables the box door to be kept in a closed state is formed in the right inner side face of the end, matched with the position of the self-locking assembly, of the box body, and the lock hole extrudes the self-locking assembly to enable the self-locking assembly to retract when the self-locking assembly enters the box body. And when the extruded self-locking assembly reaches the final locking position, the extruded self-locking assembly is allowed to rebound to a preset shape to be locked and combined with the lock hole. The self-locking device has the beneficial effects that the self-locking component can realize self-locking without executing a locking action after the self-locking component is locked and combined with the lock hole by utilizing the capability of self extrusion and retraction, the extrusion force acting on the self-locking component comes from the lock hole, and the extrusion force disappears when the self-locking component reaches the final locking position of the lock hole, so that the self-locking effect is realized. And the locking fit with the lock hole is realized without relying on magnetism.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a self-locking meter box. Background Technology

[0002] Electricity meter boxes are widely used in public power grids as cable branch boxes, low-voltage distribution boxes, water pump control boxes, communication device cabinets, street light and traffic light control boxes, multi-functional metering boxes, integrated distribution boxes, capacitor compensation boxes, terminal boxes, wall-mounted junction boxes, and metering boxes. Electricity meter boxes are a commonly used type of electrical instrumentation equipment.

[0003] Publication No. CN219100997U discloses a self-locking anti-theft mechanism for an electric meter box, comprising: a box body with an internal space; a door with a hinge between the box body and the door; a drive assembly, at least partially disposed inside the door; a shielding assembly, disposed inside the door, the drive assembly capable of adjusting the position of the shielding assembly in the vertical direction; and a self-locking assembly, at least partially disposed inside the box body. This anti-theft mechanism uses a magnetic method for self-locking to address situations where staff forget to lock the box. However, it has a drawback: the strong magnet gradually ages over time, losing its magnetism. Once the magnetism is lost, self-locking is no longer possible. Furthermore, the self-locking assembly is not exposed, so its locking status is not immediately apparent to the user. Consequently, the user cannot immediately detect the loss of magnetism, leaving the door unlocked and posing a risk of theft. Utility Model Content

[0004] This invention aims to overcome the shortcomings of the prior art by providing a self-locking meter box to solve the aforementioned problems.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This self-locking meter box includes a box body and a box door. The box door has a self-locking component with a preset shape that can be retracted by compression on the inner end face of the end away from the hinge end. The box body has a lock hole on the right inner side face of the end that is adapted to the position of the self-locking component. The lock hole is used to cooperate with the self-locking component and keep the box door in the closed state. When the self-locking component enters, the lock hole compresses the self-locking component, causing the self-locking component to retract. When the final locking position is reached, the compressed self-locking component is allowed to spring back to the preset shape and lock with the lock hole.

[0006] Further improvements include two symmetrically distributed locking rods, a telescopic rod connecting the two, and a spring fitted onto the telescopic rod and located between the two locking rods. The inner end face of the door is provided with a support assembly that allows the locking rods to move vertically within it. The telescopic rod and spring adapt to the movement of the locking rods.

[0007] Further improvements include a support assembly with two support components, including an integrally formed connecting base and a U-shaped rod. The connecting base is fixed to the rear end face of the door by welding, and the U-shaped rod has a moving space inside, which matches the outer diameter of the locking rod.

[0008] Further improvements include a long rod section, a short rod section, and a connecting section for connecting the two. The long rod section moves within the movement space, with one end locked to the lock hole and the other end extending into a first connected section. The short rod section moves within the movement space, with the end near the long rod section extending into a second connected section. The connecting section has a cavity for the first and second connected sections to be inserted. The small-diameter section of the telescopic rod is threaded to the connecting section located above, and the large-diameter section is threaded to the connecting section located below.

[0009] Further improvements include a threaded unlocking auxiliary component connected to the connecting section at the side of the telescopic rod, and a lock cylinder on the door that can be used in conjunction with both unlocking auxiliary components. The lock cylinder rotates to move the lock rods located at the upper and lower positions simultaneously in the unlocking direction.

[0010] Further improvements include an unlocking auxiliary component consisting of a connecting seat and a contact arm. The connecting seat is threadedly connected to the connecting section via its own screw portion, and the contact arm is welded and fixed to one side of the connecting seat and cooperates with the lock cylinder.

[0011] Further improvements include a contact arm that is a sheet-like component that is bent into three parts. The first part is welded and fixed to the connecting seat. The second part forms a bendable angle with the first part, and the third part is located on the side of the lock cylinder. The third part abuts against the lock cylinder. The rotating core of the lock cylinder is equipped with two symmetrically distributed and staggered paddles, which abut against the third part.

[0012] Further improvements include the addition of a first guide channel and a second guide channel on the lock hole. The first guide channel guides the lock rod to the second guide channel, and the second guide channel guides the lock rod to the lock hole.

[0013] The beneficial effects of this utility model are:

[0014] The self-locking component of this invention utilizes its own compressible and retractable capability to achieve self-locking without requiring the user to perform a locking action after it is locked with the keyhole. The compressive force acting on the self-locking component comes from the keyhole, and the compressive force disappears when the self-locking component reaches the final locking position of the keyhole, thus achieving a locking engagement with the keyhole without relying on magnetism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the full cross-section of the back of this utility model;

[0017] Figure 3 This utility model Figure 2 A magnified view of part A in the middle;

[0018] Figure 4 This is an exploded structural diagram of the locking rod of this utility model;

[0019] Figure 5 This is a schematic diagram of the full cross-sectional structure of the side of this utility model;

[0020] Figure 6 This utility model Figure 5 The diagram shows a partial enlargement of part B, illustrating the movement trajectory of the locking rod within the keyhole. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Referring to the attached diagram: This self-locking meter box includes a box body 1 and a box door 2. The box door 2 has a self-locking component 3 with a preset shape that can retract under pressure on its rear end face away from the hinge end. The box body 1 has a lock hole 4 on its right inner side face at the end that is adapted to the position of the self-locking component 3. The lock hole 4 is used to cooperate with the self-locking component 3 and keep the box door 2 in the closed state. When the self-locking component 3 is inserted, the lock hole 4 compresses the self-locking component 3, causing the self-locking component 3 to retract. When the final locked position is reached, the compressed self-locking component 3 is allowed to spring back to the preset shape and lock into the lock hole 4. The principle of this invention is that the self-locking component 3 keeps the door 2 closed by locking with the lock hole 4. The self-locking component 3 utilizes its own compressive retractable ability so that after locking with the lock hole 4, the user does not need to perform a locking action to achieve self-locking. The compressive force acting on the self-locking component 3 comes from the lock hole 4. Thus, after entering the lock hole 4, the self-locking component 3 can change its preset shape by the compressive force provided by the lock hole 4 to meet the needs of the locking process. When the self-locking component 3 reaches the final locking position of the lock hole 4, the compressive force disappears, and the self-locking component 3 returns to the preset shape to achieve locking with the lock hole 4. Compared with the prior art, this method does not rely on the magnetic attraction of permanent magnets, and therefore there is no need to consider whether the permanent magnets will lose magnetism.

[0023] The self-locking assembly 3 includes two symmetrically distributed locking rods 31, a telescopic rod 32 connecting the two, and a spring 33 fitted onto the telescopic rod 32 and located between the two locking rods 31. A support assembly 5 is provided on the inner end face of the door 2, allowing the locking rods 31 to move vertically within it. The telescopic rod 32 and spring 33 adapt to the movement of the locking rods 31. The locking rods 31 are used to lock into the lock hole 4, adapting to the pressure exerted by the lock hole 4 on the self-locking assembly 3 by the movement of the support assembly 5. The telescopic rod 32 is used to set the spring 33, so that the spring 33 can act between the two locking rods 32. It can also adapt to the movement of the locking rod 31 during the locking process. That is, it can retract when it is squeezed and extend outward after the squeeze is released. The spring 33 provides elasticity. Through the elasticity it provides, the telescopic rod 32 can extend outward by itself after the squeeze is released. At the same time, the locking rod 31 can move to the final locking position and lock with the lock hole 4 after the squeeze is released. The self-locking of the self-locking component 3 is also achieved through this structure.

[0024] The support assembly 5 has two support members 51, including an integrally formed connecting base 511 and a U-shaped rod 512. The connecting base 511 is fixed to the rear end face of the door 2 by welding. The U-shaped rod 512 has a moving space 5121 inside, and the moving space 5121 matches the outer diameter of the locking rod 31. The connecting base 511 is used to set the U-shaped rod 512, and the U-shaped rod 512 provides the moving space 5121 for the locking rod 31. The width of the moving space 5121 matches the outer diameter of the locking rod 31, so that the locking rod 31 can only move up and down in the moving space 5121, and will not move back and forth. This also means that the movement of the locking rod 31 in the back and forth direction is only dependent on the door 2, thereby avoiding the situation where the locking rod 31 and the lock hole 4 are misaligned.

[0025] Locking rod 31 includes a long rod section 311, a short rod section 312, and a connecting section 313 for connecting the two. The long rod section 311 moves within the moving space 5121, with one end locked to the lock hole 4 and the other end extending into a first connected section 3111. The short rod section 312 moves within the moving space 5121, with the end near the long rod section 311 extending into a second connected section 3121. The connecting section 313 has a cavity for inserting the first connected section 3111 and the second connected section 3121. The small-diameter section of the telescopic rod 32 connects to the connecting section located above. The connecting section 313 is threaded, and the large-diameter section is threaded to the connecting section 313 located below. This arrangement allows the locking rod 31 to be assembled and consists of three parts. During assembly, the small-diameter section and the large-diameter section of the telescopic rod 32 are pre-threaded to the corresponding connecting section 313. Then, the connecting section 313 is placed between the two support members 51. The long rod section 311 and the short rod section 312 both pass through the movement space of the corresponding support member 51 and are inserted into the connecting section 313. The two ends of the connecting section 313 are also provided with baffles to prevent the locking rod 31 from moving in the left and right directions.

[0026] The connecting section 313 is also threadedly connected to an unlocking auxiliary component 6 at the position on the side of the telescopic rod 32. The door 2 is provided with a lock cylinder 7 that can be used in conjunction with two unlocking auxiliary components 6 at the same time. The lock cylinder 7 drives the lock rod 31 located at the upper and lower positions to move simultaneously in the unlocking direction by rotating. The lock cylinder 7 and the unlocking auxiliary component 6 make it convenient for the user to release the locking engagement between the lock hole 4 and the self-locking component 3. Even if the door 2 is opened, the lock cylinder 7 is operated by the key, which causes it to rotate in the unlocking direction. The unlocking auxiliary component 6 moves under the rotation of the lock cylinder 7. Because it is connected to the lock rod 31, the lock rod 31 can also move downward after it moves, so that the lock rod 31 is released from the final locked position of the lock hole 4 and the closing constraint on the door 2 is released.

[0027] The unlocking auxiliary component 6 includes a connecting seat 61 and a contact arm 62. The connecting seat 61 is threadedly connected to the connecting section 313 via its own screw portion. The contact arm 62 is welded and fixed to one side of the connecting seat 61 and cooperates with the lock cylinder 7. The connecting seat 61 provides a setting position for the contact arm 62, so that the contact arm 62 can be located on one side of the lock cylinder 7. The contact arm 62 is used to cooperate with the lock cylinder 7 to convert the rotation of the lock cylinder 7 into the movement of the lock rod 31, thereby causing the lock rod 31 to disengage from the final locking position of the lock hole 4 and release the closing constraint on the box door 2.

[0028] The contact arm 62 is a sheet-like component, bent into three parts. The first part is welded and fixed to the connecting seat 61. The second part forms a bendable angle with the first part, allowing the third part to be located on the side of the lock cylinder 7. The third part abuts against the lock cylinder 7. The rotating core of the lock cylinder 7 is provided with two symmetrically distributed and staggered paddles 71. The paddles 71 abut against the third part. The contact arm 62 is a metal sheet formed by bending, thus forming three parts. This not only satisfies the connection with the connecting seat 61 and the engagement with the lock cylinder 7, but also gives it elasticity. This elasticity allows the contact arm 62 to be variable and to self-reset after deformation. The lock cylinder 7... The lever 71 is used in conjunction with the contact arm 62. The upper lever 71 acts on the upper part of the corresponding third part of the contact arm 62, and the lower lever 71 acts on the lower part of the corresponding third part of the contact arm 62. This ensures that the lever 71 is not on the path of the lock rod 31 being squeezed inward, and will not affect the self-locking of the self-locking assembly 3. The lever 71 only generates a force acting on the contact arm 62 when the lock cylinder 7 rotates. The elastic adaptation of the contact arm 62 can adapt to the change in the position of the lever 71 when the lock cylinder 7 rotates, and there will be no rotational interference. That is, the second part of the contact arm 62 can bend outward with the change in the position of the lever 71.

[0029] The lock hole 4 has a first guide channel 41 and a second guide channel 42 on the housing 1. The first guide channel 41 guides the locking rod 31 into the second guide channel 42, and the second guide channel 42 guides the locking rod 31 into the lock hole 4. The locking rod 31 enters through the first guide channel 41. The entrance end of the first guide channel 41 has a conical shape, which not only enlarges the entrance end of the first guide channel 41, but also allows the resulting inclined surface to serve as a guide surface for the locking rod 31. That is, the starting point of the inclined surface is at the same horizontal position as the locking rod 31. While facilitating the entry of the locking rod 31, the change in inclination immediately generates a squeezing force on the locking rod 31. The first guide channel 41 guides the locking rod 31 to move in the lateral direction, while the second guide channel 42 guides the locking rod 31 to move in the vertical direction. The lock hole 4 is located above the second guide channel 42. Thus, after the locking rod 31 enters the second guide channel 42, it moves upward and enters the lock hole 4, thereby restoring the self-locking assembly 3 to the preset shape. Moreover, without the squeezing force driving the locking rod 31 to move downward, the locking rod 31 can be stably held in the lock hole 4.

[0030] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A self-locking meter box, comprising a box body (1) and a box door (2), characterized in that: The door (2) has a self-locking component (3) with a preset shape that can retract when squeezed on its rear end face away from the hinge end. The box body (1) has a lock hole (4) on the right inner side face of the end that is adapted to the position of the self-locking component (3) to cooperate with the self-locking component (3) and keep the door (2) in the closed state. When the self-locking component (3) enters, the lock hole (4) squeezes the self-locking component (3) to retract the self-locking component (3), and when it reaches the final locked position, it allows the squeezed self-locking component (3) to spring back to the preset shape and lock with the lock hole (4).

2. The self-locking meter box according to claim 1, characterized in that: The self-locking assembly (3) includes two locking rods (31) symmetrically distributed at the top and bottom, a telescopic rod (32) for connecting the two, and a spring (33) fitted on the telescopic rod (32) and located between the two locking rods (31). The inner end face of the door (2) is provided with a support assembly (5) that allows the locking rod (31) to move vertically inside it. The telescopic rod (32) and the spring (33) adapt to the expansion and contraction when the locking rod (31) moves.

3. The self-locking meter box according to claim 2, characterized in that: The support assembly (5) has two support members (51), including an integrally formed connecting base (511) and a U-shaped rod (512). The connecting base (511) is fixed to the rear end face of the door (2) by welding. The U-shaped rod (512) has a moving space (5121) inside, and the moving space (5121) matches the outer diameter of the locking rod (31).

4. The self-locking meter box according to claim 3, characterized in that: The locking rod (31) includes a long rod section (311), a short rod section (312), and a connecting section (313) for connecting the two. The long rod section (311) moves within the moving space (5121), with one end locked to the locking hole (4) and the other end extending out to form a first connected section (3111). The short rod section (312) moves within the moving space (5121), with one end near the long rod section (311) extending out to form a second connected section (3121). The connecting section (313) is provided with a cavity for the first connected section (3111) and the second connected section (3121) to be inserted into. The small diameter section (321) of the telescopic rod (32) is threadedly connected to the connecting section (313) located above, and the large diameter section (322) is threadedly connected to the connecting section (313) located below.

5. The self-locking meter box according to claim 4, characterized in that: The connecting section (313) is also threaded with an unlocking auxiliary component (6) at the position on the side of the telescopic rod (32). The door (2) is provided with a lock cylinder (7) that can be used in conjunction with two unlocking auxiliary components (6) at the same time. The lock cylinder (7) drives the lock rod (31) located at the upper and lower positions to move simultaneously in the unlocking direction by rotating.

6. The self-locking meter box according to claim 5, characterized in that: The unlocking auxiliary component (6) includes a connecting seat (61) and a contact arm (62). The connecting seat (61) is threadedly connected to the connecting section (313) through its own screw portion. The contact arm (62) is welded and fixed to one side of the connecting seat (61) and cooperates with the lock cylinder (7).

7. The self-locking meter box according to claim 6, characterized in that: The contact arm (62) is a sheet-like component, which is bent into three parts. The first part is welded and fixed on the connecting seat (61). The second part and the first part form a bendable angle, and the third part is located on the side of the lock cylinder (7). The third part abuts and cooperates with the lock cylinder (7). The rotating core of the lock cylinder (7) is provided with two symmetrically distributed and staggered paddles (71). The paddles (71) abut and cooperate with the third part.

8. The self-locking meter box according to claim 2, characterized in that: The lock hole (4) is provided with a first guide channel (41) and a second guide channel (42) on the housing (1). The first guide channel (41) guides the lock rod (31) to the second guide channel (42), and the second guide channel (42) guides the lock rod (31) to the lock hole (4).

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