A miniature circuit breaker

Abstract

This utility model discloses a miniature circuit breaker, including a housing. A partition plate is fixedly connected to the inside of the housing by rivets. A snap-fit ​​position is formed on the bottom surface of one end of the housing. Sliding grooves are formed on the lower sides of the outer walls of the housing at positions opposite to the snap-fit ​​position. A snap-fit ​​assembly is slidably connected within the sliding grooves. Multiple latches are formed on the surface of the snap-fit ​​position. Multiple heat dissipation vents are formed on the bottom of the partition plate at positions opposite to the snap-fit ​​position. The heat dissipation vents are offset from the latches. The snap-fit ​​assembly includes a sliding seat and a locking plate. The sliding seat is slidably connected within the sliding groove, and the locking plate is movably connected within the sliding seat. Clamping plates are fixedly connected to the surface of the sliding seat on both sides of the locking plate, and these clamping plates are movably connected within the latches. By setting up the snap-fit ​​assembly, the problem of snap-fit ​​damage is solved, reducing the replacement frequency due to snap-fit ​​failure; significantly extending the overall service life of the circuit breaker, and reducing the user's use and maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically a miniature circuit breaker. Background Technology

[0002] Miniature circuit breakers, also known as micro circuit breakers, are suitable for overload and short-circuit protection of AC 50 / 60Hz lines with a rated voltage of 230 / 400V and a rated current not exceeding 125A. They can also be used for infrequent switching of lines under normal conditions. Miniature circuit breakers are mainly used in various places such as industrial, commercial, high-rise, and residential buildings.

[0003] However, in order to facilitate the installation and removal of miniature circuit breakers, manufacturers usually adopt a snap-on installation method. However, the snap-on design in the existing technology is relatively simple. This can easily lead to the snap-on becoming unusable when the miniature circuit breaker is frequently disassembled and installed, thus affecting the installation of the miniature circuit breaker and reducing its service life. Summary of the Invention

[0004] The purpose of this utility model is to provide a miniature circuit breaker to solve the problem mentioned in the background art, where the snap-on design is relatively simple. This makes it easy for the snap-on to become unusable when the miniature circuit breaker is frequently disassembled and reassembled, thereby affecting the installation of the miniature circuit breaker and reducing its service life.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a miniature circuit breaker, comprising a housing, wherein a partition plate is fixedly connected inside the housing by rivets, a snap-fit ​​position is provided on the bottom surface of one end of the housing, and sliding grooves are provided on the lower sides of the outer walls of the housing at positions opposite to the snap-fit ​​position, a snap-fit ​​assembly is slidably connected in the sliding groove, multiple slots are provided on the surface of the snap-fit ​​position, and multiple heat dissipation vents are provided on the bottom of the partition plate at positions opposite to the snap-fit ​​position, the heat dissipation vents and slots are designed to be misaligned, the snap-fit ​​assembly includes a sliding seat and a locking plate, the sliding seat is slidably connected in the sliding groove, the locking plate is movably connected in the sliding seat, and a locking plate is fixedly connected on both sides of the locking plate on the surface of the sliding seat, and the locking plate is movably connected in the slot.

[0006] Preferably, the sliding seat has an opening between the two plates, the rear surface of the sliding seat has a guide opening opposite to the opening, and the front surface of the sliding seat has a limit opening opposite to the opening.

[0007] Preferably, the locking plate includes a locking head, a spring, and a guide block. The locking head is fixed to the front end of the spring, and the guide block is fixedly connected to the rear end of the spring. The locking head is movable in the limiting port, the guide block is movable in the guide port, and the spring is movable in the movable port.

[0008] Preferably, the front and rear ends of the outer wall of the spring abut against the inner walls of the front and rear ends of the movable opening.

[0009] Preferably, the other end of the bottom of the housing is fixedly connected to a snap-fit ​​seat that cooperates with the snap-fit ​​assembly at a position opposite to the snap-fit ​​assembly.

[0010] Beneficial effects

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows:

[0012] By incorporating a snap-fit ​​assembly into the structural design of this invention, the problem of snap-fit ​​vulnerability is solved, reducing the frequency of replacements due to snap-fit ​​failure. Simultaneously, the inclusion of a heat dissipation vent enhances heat dissipation performance and reduces the risk of thermal failure. This dual optimization significantly extends the overall service life of the circuit breaker and reduces user operating and maintenance costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the bottom structure of the shell of this utility model;

[0015] Figure 3 This is a schematic diagram of the buckle assembly structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the split structure of the buckle assembly of this utility model.

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

[0018] 1. Housing; 2. Divider plate; 3. Snap-fit ​​assembly; 4. Snap-fit ​​base; 11. Snap-fit ​​position; 12. Bayonet opening;

[0019] 13. Heat dissipation vent; 14. Sliding groove; 31. Sliding seat; 32. Locking plate; 33. Clamping plate; 311. Movable opening;

[0020] 312. Guide port; 313. Limit port; 321. Spring; 322. Guide block; 323. Locking head. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "front," "rear," "inner," "outer," "vertical," and "horizontal," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] like Figure 1-4 This is a schematic diagram of a preferred embodiment of a miniature circuit breaker according to the present invention. In this embodiment, a miniature circuit breaker is provided, including a housing 1 made of insulating material. An insulating partition plate 2 is fixedly installed inside the housing 1 by rivets, dividing the internal space of the housing into an electrical component cavity and a wiring cavity. A rectangular groove-shaped snap-fit ​​position 11 is machined at one end of the bottom of the housing 1, and multiple rectangular snap-fit ​​slots 12 are evenly opened on the surface of the snap-fit ​​position 11. Multiple strip-shaped heat dissipation vents 13 are opened at the bottom of the partition plate 2 corresponding to the snap-fit ​​position 11, and the heat dissipation vents 13 and the snap-fit ​​slots 12 are staggered in the horizontal direction to avoid weakening the structural strength; at the same time, external airflow enters through the gap of the snap-fit ​​position 11 through the heat dissipation vents 13 and flows into the electrical component cavity of the housing 1 through the staggered heat dissipation vents 13, which plays a role in heat dissipation. A pair of sliding grooves 14 are symmetrically opened on the lower part of the outer walls on both sides of the housing 1. The sliding grooves 14 extend along the length of the housing and communicate with the snap-fit ​​position 11.

[0024] In this embodiment, the latching assembly 3 consists of a sliding seat 31 and a locking plate 32. The sliding seat 31 is injection molded from engineering plastic, with its two side flanges embedded in the sliding groove 14 for sliding guidance. Two locking plates 33 are symmetrically fixed to the top of the sliding seat 31, and the locking plates 33 can be inserted into the locking slot 12. The sliding seat 31 has a through-hole 311 in the middle, a square guide opening 312 at its rear end, and a rectangular limiting opening 313 at its front end. The locking plate 32 includes a spring 321, a guide block 322, and a locking head 323. The spring 321 is placed in the through-hole 311, with the locking head 323 welded to its front end and the square guide block 322 welded to its rear end. The locking head 323 moves within the limiting opening 313, and the guide block 322 moves within the guide opening 312. The natural length of the spring 321 is greater than the depth of the movable opening 311, so that its two ends always abut against the front and rear inner walls of the movable opening 311, forming a pre-compressed state. The locking plate 32, which acts as a buffer through the spring 321, absorbs mechanical impact during disassembly and assembly, and avoids hard friction of the jamming plate 33; the sliding seat 31 guides the entire stroke to reduce uneven wear.

[0025] In this embodiment, a snap-fit ​​seat 4 is fixed at the other end of the bottom of the housing 1. Its structure is complementary to the snap-fit ​​position 11 and is used to cooperate with the power distribution rail.

[0026] Working principle

[0027] Initial state: Pressing the locking head 323 compresses the spring 321, causing the locking plate 32 to move backward as a whole, and the locking plate 33 to fully retract into the sliding groove 14.

[0028] Inserting into the guide rail: Snap the mounting bracket 4 onto one side of the power distribution guide rail, and push the buckle assembly 3 to slide along the sliding groove 14 to the other end of the housing until the mounting plate 33 is embedded in the guide rail slot.

[0029] Locking position: Release the locking head 323, and the spring 321 rebounds, pushing the locking head 323 out of the limiting port 313 to abut against the inner wall of the power distribution guide rail, preventing the sliding seat 31 from accidentally retracting. At this time, the locking plate 33 is rigidly engaged with the guide rail through the locking slot 12.

[0030] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A miniature circuit breaker, comprising a housing (1), characterized in that: The housing (1) is internally fixed with a partition plate (2) by rivets. A snap-fit ​​position (11) is provided on the bottom surface of one end of the housing (1). Sliding grooves (14) are provided on the lower sides of the outer walls of the housing (1) at positions opposite to the snap-fit ​​positions (11). A buckle assembly (3) is slidably connected in the sliding grooves (14). Multiple snap-fit ​​slots (12) are provided on the surface of the snap-fit ​​positions (11). Multiple snap-fit ​​slots (12) are provided on the bottom of the partition plate (2) at positions opposite to the snap-fit ​​positions (11). A heat dissipation vent (13) is designed to be offset from the slot (12). The buckle assembly (3) includes a sliding seat (31) and a locking plate (32). The sliding seat (31) is slidably connected in the sliding groove (14). The locking plate (32) is movably connected in the sliding seat (31). The sliding seat (31) is fixedly connected to the locking plate (32) on both sides of the locking plate (32), and the locking plate (33) is movably connected in the slot (12).

2. The miniature circuit breaker according to claim 1, characterized in that: The sliding seat (31) is provided with an opening (311) between the two plates (33), the rear end surface of the sliding seat (31) is provided with a guide opening (312) at the opposite position of the opening (311), and the front end surface of the sliding seat (31) is provided with a limit opening (313) at the opposite position of the opening (311).

3. The miniature circuit breaker according to claim 1, characterized in that: The locking plate (32) includes a locking head (323), a spring (321) and a guide block (322). The front end of the spring (321) is fixed with the locking head (323), and the rear end of the spring (321) is fixedly connected with the guide block (322). The locking head (323) is movable in the limiting port (313), the guide block (322) is movable in the guide port (312), and the spring (321) is movable in the movable port (311).

4. The miniature circuit breaker according to claim 3, characterized in that: The front and rear ends of the outer wall of the spring (321) abut against the inner walls of the front and rear ends of the movable opening (311).

5. The miniature circuit breaker according to claim 1, characterized in that: The other end of the bottom of the housing (1) is fixedly connected to a snap-fit ​​seat (4) that cooperates with the snap-fit ​​assembly (3) at a position opposite to the snap-fit ​​assembly (3).

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