Embedded plug for isolating internal structure of circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, and particularly relates to an embedded plug used for isolating the internal structure of a circuit breaker, which comprises a circuit breaker shell, an adjusting cavity arranged at the lower end of the circuit breaker shell; the clamping groove is formed in one side of the adjusting cavity, and an adjusting screw is arranged in the clamping groove; the mounting hole is formed in the other side of the adjusting cavity, and the mounting hole is communicated with the outside; the protection plug is embedded in the middle of the mounting hole and used for sealing the adjusting cavity and protecting the adjusting screw from being isolated from the outside; the mounting hole is formed in one side of the adjusting screw of the circuit breaker, the wide groove and the disc-shaped root part which can be mutually embedded are arranged, when the disc-shaped root part is completely embedded into the wide groove, the disc-shaped root part and the wide groove are completely fixed through the outwards-convex root part of the disc-shaped root part, and once the protection plug is mounted in the mounting hole, the protection plug can be fixed to the wide groove through the outwards-convex root part of the disc-shaped root part. Except that the protection plug cannot be pulled out when external force is applied to damage the mounting hole, the adjusting screw is ensured to be separated from the outside after product verification is completed, and the adjusting screw is ensured not to be adjusted by a purchaser after the circuit breaker leaves a factory.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and in particular relates to an embedded plug used for isolating the internal structure of a circuit breaker. Background Art

[0002] The sensitivity and parameters of the circuit breaker are uniformly debugged by professionals before leaving the factory. The operator calibrates the sensitivity of the circuit breaker by changing the screw-in distance of the adjustment screw. After the circuit breaker is calibrated at the factory, if the purchaser or other individuals privately adjust the sensitivity parameters of the circuit breaker, it will cause the product delay to be inaccurate and reduce the circuit protection function of the circuit breaker. Therefore, in order to prevent the circuit breaker from being privately modified by the purchaser after leaving the factory, causing the circuit breaker to lose its protection function for the circuit and cause safety hazards, it is necessary to design a circuit breaker protection structure to separate the circuit breaker's adjustment screw from the outside world to prevent the purchaser from privately adjusting the circuit breaker's adjustment screw. Utility Model Content

[0003] The purpose of the utility model is to provide an embedded plug for isolating the internal structure of a circuit breaker to solve the problems raised in the above background technology. The following technical solution is provided: an embedded plug for isolating the internal structure of a circuit breaker, comprising:

[0004] A circuit breaker housing, wherein an adjustment chamber is provided at the lower end of the circuit breaker housing;

[0005] A card slot is arranged at one side of the adjustment cavity, and an adjustment screw is arranged inside the card slot;

[0006] A mounting hole is provided on the other side of the adjusting cavity, and the mounting hole is communicated with the outside world;

[0007] The protective plug is embedded in the middle of the installation hole and is used to seal the adjustment cavity and protect the adjustment screw from the outside world.

[0008] In the present technical solution, the sensitivity and parameters of the circuit breaker are uniformly debugged by professionals before leaving the factory. When the circuit breaker is shipped out of the factory, after the product verification is completed, in order to prevent the purchaser from privately adjusting the sensitivity parameters of the circuit breaker to change the protection function of the circuit breaker, when shipping out of the factory, the operator first adjusts the sensitivity parameters of the circuit breaker to the standard value by adjusting the adjusting screw, and then inserts the protective plug from the outer end opening of the mounting hole to the middle of the mounting hole; when the protective plug is fully inserted, the tail of the protective plug is embedded in the mounting hole and the adjustment cavity is closed. After the protective plug is embedded, the position of the protective plug in the mounting hole is fixed. At this time, the mounting hole completely limits the position of the protective plug, resulting in the protective plug being unable to be reversely removed from the mounting hole, thereby isolating the adjusting screw from the outside world, ensuring that the adjusting screw of the circuit breaker will not be adjusted by the purchaser after shipping out of the factory.

[0009] In any of the above technical solutions, further, a wide groove is fixedly opened in the middle of the mounting hole, and the diameter of the wide groove is larger than the diameter of the mounting hole, and a protrusion is provided in the middle of the wide groove;

[0010] The protective plug consists of a cylindrical head and a disc-shaped root. The diameter of the cylindrical head is the same as the diameter of the mounting hole. The disc-shaped root is arranged on one side of the cylindrical head. One side of the disc-shaped root is arc-shaped, and grooves are evenly arranged on the disc-shaped root, and the grooves are embedded with the protrusions. A shrinkage hole is provided in the middle of the disc-shaped root, and the shrinkage hole is used to prevent stress collapse when the disc-shaped root is installed.

[0011] In the present technical solution, a shrinkage hole is arranged in the middle of the disc-shaped root. When the protective plug is embedded in the mounting hole, the disc-shaped root will be squeezed during insertion because the diameter of the disc-shaped root is larger than the diameter of the mounting hole. The set shrinkage hole ensures that the disc-shaped root has space to shrink after being squeezed by the mounting hole during insertion, thereby preventing the disc-shaped root from being crushed and damaged due to excessive stress during embedding. The diameter of the wide groove is slightly larger than the outer diameter of the disc-shaped root, thereby ensuring that the disc-shaped root can be effectively embedded in the wide groove. After embedding, the wide groove completely limits the horizontal freedom of the protective plug. When the disc-shaped root is inserted into the wide groove, the rear groove can just fit with the protrusion, thereby limiting the rotational freedom of the protective plug and ensuring that the protective plug will not rotate horizontally after installation.

[0012] In any of the above technical solutions, further, a nut is fixedly provided on the slot, and an adjusting screw is provided on the nut.

[0013] In the present technical solution, the sensitivity of the circuit breaker is changed by adjusting the screw-in distance between the adjusting screw and the nut before the circuit breaker leaves the factory. After the adjusting screw is screwed in to adjust the circuit breaker, the screw-in position of the adjusting screw is fixed. Therefore, in order to ensure the sensitivity of the circuit breaker, the adjusting screw must be sealed from the outside world after leaving the factory to avoid safety hazards caused by the purchaser adjusting the sensitivity of the circuit breaker by himself.

[0014] The beneficial effects of the utility model are as follows: by arranging a mounting hole on one side of the adjusting screw of the circuit breaker, by arranging two wide grooves and a disc-shaped root portion that can be engaged with each other, when the disc-shaped root portion is completely embedded in the wide groove, the convex root portion of the disc-shaped root portion is utilized to achieve complete fixation with the wide groove, and once the protective plug is installed with the mounting hole, the protective plug cannot be pulled out unless an external force is applied to destroy the mounting hole, so that after the product verification is completed, the adjusting screw is separated from the outside world, ensuring that the adjusting screw will not be adjusted by the purchaser after the circuit breaker leaves the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0016] Figure 2 yes Figure 1An enlarged schematic diagram of

[0017] Figure 3 It is a schematic diagram of the structure of the mounting hole in the utility model;

[0018] Figure 4 It is a three-dimensional structural diagram of the protective plug in the utility model.

[0019] The reference numerals in the figure are: 10, circuit breaker housing; 11, adjustment chamber; 20, slot; 21, nut; 30, mounting hole; 31, wide slot; 32, protrusion; 40, protective plug; 41, cylindrical head; 42, disc-shaped root; 43, groove; 44, shrinkage hole; 50, adjusting screw. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0021] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0022] Embodiment 1:

[0023] like Figure 1-2 As shown, this embodiment provides an embedded plug for isolating the internal structure of a circuit breaker, comprising:

[0024] A circuit breaker housing 10, wherein an adjustment chamber 11 is provided at the lower end of the circuit breaker housing 10;

[0025] The card slot 20 is arranged at one side of the adjustment cavity 11, and an adjustment screw 50 is arranged inside the card slot 20;

[0026] The mounting hole 30 is provided on the other side of the adjusting cavity 11, and the mounting hole 30 communicates with the outside;

[0027] The protection plug 40 is embedded in the middle of the mounting hole 30 to seal the adjustment cavity 11 and protect the adjustment screw 50 from the outside.

[0028] In the present technical solution, the sensitivity and parameters of the circuit breaker are uniformly debugged by professionals before leaving the factory. After the product verification is completed when the circuit breaker leaves the factory, in order to prevent the purchaser from privately adjusting the sensitivity parameters of the circuit breaker to change the protection function of the circuit breaker, when leaving the factory, the operator first adjusts the sensitivity parameters of the circuit breaker to the standard value by adjusting the adjusting screw 50, and then inserts the protective plug 40 from the outer end opening of the mounting hole 30 to the middle of the mounting hole 30; when the protective plug 40 is fully inserted, the tail of the protective plug 40 is embedded in the mounting hole 30 and closes the adjustment cavity 11. After the protective plug 40 is embedded, the position of the protective plug 40 in the mounting hole 30 is fixed. At this time, the mounting hole 30 completely limits the position of the protective plug 40, resulting in the protective plug 40 cannot be reversely removed from the mounting hole 30, thereby isolating the adjusting screw 50 from the outside world, ensuring that the adjusting screw 50 of the circuit breaker will not be adjusted by the purchaser after leaving the factory.

[0029] In a preferred embodiment of the present invention:

[0030] like Figure 3-4 As shown, specifically, a wide groove 31 is fixedly opened in the middle of the mounting hole 30, and the diameter of the wide groove 31 is larger than the diameter of the mounting hole 30, and a protrusion 32 is provided in the middle of the wide groove 31;

[0031] The protective plug 40 consists of a cylindrical head 41 and a disc-shaped root 42. The diameter of the cylindrical head 41 is the same as the diameter of the mounting hole 30. The disc-shaped root 42 is arranged on one side of the cylindrical head 41. One side of the disc-shaped root 42 is arc-shaped, and grooves 43 are evenly arranged on the disc-shaped root 42, and the grooves 43 are embedded with the protrusions 32. A shrinkage hole 44 is provided in the middle of the disc-shaped root 42, and the shrinkage hole 44 is used to prevent stress collapse when the disc-shaped root 42 is installed.

[0032] In the present technical solution, a shrinkage hole 44 is provided in the middle of the disc-shaped root 42. When the protective plug 40 is embedded in the mounting hole 30, since the diameter of the disc-shaped root 42 is larger than the diameter of the mounting hole 30, the disc-shaped root 42 will be squeezed during insertion. The set shrinkage hole 44 ensures that the disc-shaped root 42 has space to shrink after being squeezed by the mounting hole 30 during insertion, thereby preventing the disc-shaped root 42 from being crushed and damaged due to excessive stress during embedding; and the diameter of the wide groove 31 is slightly larger than the outer diameter of the disc-shaped root 42, thereby ensuring that the disc-shaped root 42 can be effectively embedded in the wide groove 31. After embedding, the wide groove 31 completely limits the horizontal freedom of the protective plug 40; and when the disc-shaped root 42 is inserted into the wide groove 31, the rear groove 43 can just fit with the protrusion 32, thereby limiting the rotational freedom of the protective plug 40, thereby ensuring that the protective plug 40 will not rotate horizontally after installation.

[0033] In a preferred embodiment of the present invention:

[0034] like Figure 2-3 As shown, specifically, a nut 21 is fixedly provided on the slot 20 , and an adjusting screw 50 is provided on the nut 21 .

[0035] In the present technical solution, the sensitivity of the circuit breaker is changed by adjusting the screw-in distance between the adjusting screw 50 and the nut 21 before the circuit breaker leaves the factory. After the adjusting screw 50 is screwed in to adjust the circuit breaker, the screw-in position of the adjusting screw 50 is fixed. Therefore, in order to ensure the sensitivity of the circuit breaker, the adjusting screw 50 must be sealed from the outside world after leaving the factory to avoid safety hazards caused by the purchaser adjusting the sensitivity of the circuit breaker by himself.

[0036] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An embedded plug for isolating the internal structure of a circuit breaker, characterized in that: include: A circuit breaker housing (10), wherein an adjustment chamber (11) is provided at the lower end of the circuit breaker housing (10); A card slot (20) is arranged on one side of the adjustment cavity (11), and an adjustment screw (50) is arranged inside the card slot (20); A mounting hole (30) is provided on the other side of the adjusting cavity (11), and the mounting hole (30) is communicated with the outside; A protective plug (40) is embedded in the middle of the mounting hole (30) and is used to seal the adjustment cavity (11) and protect the adjustment screw (50) from the outside.

2. The embedded plug for isolating the internal structure of a circuit breaker according to claim 1, characterized in that: A wide groove (31) is fixedly provided in the middle of the mounting hole (30), and the diameter of the wide groove (31) is larger than the diameter of the mounting hole (30). A protrusion (32) is provided in the middle of the wide groove (31).

3. The embedded plug for isolating the internal structure of a circuit breaker according to claim 2, characterized in that: The protective plug (40) consists of two parts: a cylindrical head (41) and a disc-shaped root (42); the diameter of the cylindrical head (41) is the same as the diameter of the mounting hole (30); and the disc-shaped root (42) is arranged on one side of the cylindrical head (41).

4. The embedded plug for isolating the internal structure of a circuit breaker according to claim 3, characterized in that: One side of the disc-shaped root portion (42) is in an arc shape, and grooves (43) are evenly arranged on the disc-shaped root portion (42), and the grooves (43) are embedded with the protrusions (32).

5. The embedded plug for isolating the internal structure of a circuit breaker according to claim 3, characterized in that: A shrinkage hole (44) is provided in the middle of the disc-shaped root portion (42), and the shrinkage hole (44) is used to prevent stress collapse when the disc-shaped root portion (42) is installed.

6. The embedded plug for isolating the internal structure of a circuit breaker according to claim 1, characterized in that: A nut (21) is fixedly provided on the clamping slot (20), and an adjusting screw (50) is provided on the nut (21).

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