Miniature circuit breaker with stable wiring

Abstract

The utility model discloses a miniature circuit breaker with stable wiring, which comprises a shell, wiring chambers are arranged at two ends of the shell, a pressure-bearing groove is arranged above an inlet of each wiring chamber, a liftable wire pressing plate is arranged in each wiring chamber, each wire pressing plate is provided with an extension plate, and the extension plate is provided with a pressure-bearing groove. The extension plate is provided with an insulation block and located below the pressure bearing groove, and a spring is arranged at the bottom of the wiring cavity and applies upward acting force to the wire pressing plate. The pressing plate gradually ascends by rotating the fastening screw, the force for rotating the fastening screw is reduced by the elastic force released by the spring in the ascending process, so that the labor-saving effect is achieved, and after the exposed part of the wire is tightly pressed on the conductive plate by the abutting surface, the wire is tightly pressed in the pressure-bearing groove by the insulating block, so that the wire is doubly fixed, and the wire is prevented from loosening and falling off. Therefore, the product has the advantages of being stable in wiring and reliable in fixation.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a miniature circuit breaker with stable wiring. Background Art

[0002] Miniature circuit breakers are crucial control and protection devices in low-voltage power distribution systems. They rapidly interrupt fault currents in the event of overloads or short circuits, protecting the distribution system and electrical equipment. Due to the concerns about circuit failures and fires caused by loose wiring in commercially available miniature circuit breakers, the applicant has devised a design and found a solution to these problems. The technical solution described below was developed within this context. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned traditional miniature circuit breaker design and provide a product with stable wiring and reliable fixation.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions.

[0005] A miniature circuit breaker with stable wiring comprises a shell, with wiring chambers provided at both ends of the shell, a pressure-bearing groove provided above the entrance of the wiring chamber, a liftable wire pressing plate provided in the wiring chamber, the wire pressing plate provided with an extension plate, the extension plate provided with an insulating block and located below the pressure-bearing groove, and a spring provided at the bottom of the wiring chamber to apply an upward force to the wire pressing plate.

[0006] Preferably, a conductive plate is provided inside the wire pressing plate, and the wire pressing plate is further provided with a resisting portion located below the conductive plate.

[0007] Preferably, the upper end of the wire pressing plate is threadedly connected with a fastening screw and abuts against the conductive plate. The bottom of the wire pressing plate is provided with a convex column, and the spring is arranged on the outer wall of the convex column.

[0008] Preferably, the insulating block is provided with an arc-shaped contact surface, and the extension plate is made of plastic.

[0009] Preferably, the pressure-bearing groove is configured to be arc-shaped.

[0010] Beneficial effects:

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model rotates the fastening screw to gradually raise the pressing plate. During the rising process, the elastic force released by the spring reduces the force of rotating the fastening screw, thereby achieving a labor-saving effect. When the contact surface presses the exposed part of the wire against the conductive plate, the insulating block also presses the wire into the pressure-bearing groove at the same time, thereby doubly fixing the wire to prevent safety accidents and fires caused by loose wires. In addition, the spring increases the friction between the fastening screw and the threaded groove of the wire pressing plate, thereby preventing the risk of loosening the fastening screw due to vibration, so that the product has the advantages of stable wiring and reliable fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of a miniature circuit breaker with stable wiring according to the utility model;

[0014] Figure 2 For this utility model Figure 1 A partial enlarged view of a miniature circuit breaker with stable wiring;

[0015] Figure 3 This is a top view of the internal structure of a miniature circuit breaker with stable wiring according to the utility model;

[0016] Figure 4 For this utility model Figure 3 A partial enlarged view of a miniature circuit breaker with stable wiring B;

[0017] The corresponding relationship between the labels and component names in the figures is as follows:

[0018] Figure numerals: 1, shell; 2, wiring chamber; 3, wire pressing plate; 4, extension plate; 5, spring; 6, conductive plate; 7, fastening screw; 21, pressure-bearing groove; 31, interference part; 32, boss; 41, insulating block; 42, interference surface. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0021] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0022] Reference example Figures 1 to 4 The cam 21 is provided with a plurality of holes 41 on the bottom of the cam 21, and the cam 22 is provided with a plurality of holes 42 on the bottom of the cam 21. The cam 22 is provided with a plurality of holes 41 on the bottom of the cam 21, and the cam 22 is provided with a plurality of holes 42 on the bottom of the cam 21.

[0023] It is worth mentioning that a conductive plate 6 is provided inside the pressing plate 3, and the pressing plate 3 is also provided with a contact portion 31, which is located below the conductive plate 6. The conductive plate 6 is electrically connected to the electromagnetic release or the dynamic contact frame. The contact portion 31 mainly presses the wire against the conductive plate 6, and the extension plate 4 is connected and fixed to the pressing plate 3 by a hot riveting process. The height of the contact portion 31 will be higher than the bulge after hot riveting, thereby preventing the bulge from interfering with the operation of the pressing plate 3 to press the wire against the conductive plate 6.

[0024] It is worth mentioning that the upper end of the pressing plate 3 is threadedly connected with a fastening screw 7 and abuts against the conductive plate 6. The bottom of the pressing plate 3 is provided with a boss 32, and the spring 5 is arranged on the outer wall of the boss 32. The boss 32 prevents the spring 5 from detaching, so that the force of the spring 5 is concentrated. At the same time, the boss 32 also limits the distance that the pressing plate 3 descends, thereby protecting the spring 5 from excessive compression.

[0025] It is worth mentioning that the insulating block 41 is provided with an arc-shaped contact surface 42, and the extension plate 4 is set to a plastic material. The contact surface 42 conforms to the shape of the wire, increasing the contact area and friction with the wire. The extension plate 4 is made of plastic material to prevent the power of the line from being conducted to the extension plate 4, preventing people from accidentally getting electric shock.

[0026] It is worth mentioning that the pressure-bearing groove 21 is set to an arc shape, which fits the shape of the wire and increases the contact area and friction with the wire. Through the above design scheme, the product can achieve the advantages of stable wiring and reliable fixation.

[0027] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A miniature circuit breaker with stable wiring, characterized by: The invention comprises a shell (1), wherein both ends of the shell (1) are provided with wiring chambers (2), a pressure groove (21) is provided above the entrance of the wiring chamber (2), a lifting wire pressing plate (3) is provided in the wiring chamber (2), the wire pressing plate (3) is provided with an extension plate (4), the extension plate (4) is provided with an insulating block (41) and is located below the pressure groove (21), and a spring (5) is provided at the bottom of the wiring chamber (2) to apply an upward force to the wire pressing plate (3).

2. The miniature circuit breaker with stable connection according to claim 1, characterized in that: A conductive plate (6) is provided inside the wire pressing plate (3), and the wire pressing plate (3) is further provided with a contact portion (31) located below the conductive plate (6).

3. The miniature circuit breaker with stable connection according to claim 2, characterized in that: The upper end of the wire pressing plate (3) is threadedly connected with a fastening screw (7) and abuts against the conductive plate (6). The bottom of the wire pressing plate (3) is provided with a convex column (32), and the spring (5) is arranged on the outer wall of the convex column (32).

4. The miniature circuit breaker with stable connection according to claim 2 or 3, characterized in that: The insulating block (41) is provided with an arc-shaped contact surface (42), and the extension plate (4) is made of plastic material.

5. The miniature circuit breaker with stable connection according to claim 4, characterized in that: The pressure-bearing groove (21) is configured to be arc-shaped.

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