A miniature circuit breaker that facilitates switching magnetic systems
By setting an installation area inside the circuit breaker housing, the switching between helical coil type, snap-action type and shunt excitation auxiliary magnetic system is realized, which solves the problem of non-switchable magnetic system in the prior art, reduces production costs and enhances market competitiveness.
Patent Information
- Application Number
- CN202620807839.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-03
- Publication Date
- 2026-07-03
- Estimated Expiration
- 2036-06-03
AI Technical Summary
The magnetic system of existing miniature circuit breakers cannot be switched, resulting in high production costs and an inability to meet the needs of different magnetic systems simultaneously.
An installation area is set inside the circuit breaker housing to fix the helical coil type, snap-action type or shunt excitation auxiliary magnetic system, so as to realize the switching of magnetic system. The armature and the reaction spring are connected by the mounting bracket and the shaft pin hole to realize the installation adaptation of different magnetic systems.
By enabling the installation of three magnetic systems through a single housing, the cost of producing multiple housings is reduced, thereby enhancing market competitiveness.
Smart Images
Figure CN224458054U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit breaker technology, specifically a miniature circuit breaker that facilitates switching of magnetic systems. Background Technology
[0002] Currently, the magnetic systems of miniature circuit breakers in the industry are basically independent and non-switchable: one is a snap-action type and the other is a spiral coil type, which enables the product to trip quickly when the circuit breaker is subjected to short-circuit current. The snap-action type has fewer parts and lower cost, but poorer current limiting and short-circuit breaking capacity. The spiral coil type has more parts and slightly higher cost, but better current limiting and short-circuit breaking capacity.
[0003] In the market, each circuit breaker housing corresponds to one magnetic system. If a manufacturer is to produce circuit breakers with snap-action magnetic systems, helical coil magnetic systems, or shunt-excitation auxiliary magnetic systems, at the same time, the manufacturer needs at least three types of housing structures. Each type of housing requires mold making costs. Therefore, housings that can adapt to snap-action magnetic systems, helical coil magnetic systems, or shunt-excitation auxiliary magnetic systems are preferred. Utility Model Content
[0004] The purpose of this invention is to provide a miniature circuit breaker that facilitates switching of magnetic systems, in order to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a miniature circuit breaker that facilitates switching of magnetic systems, comprising a housing, wherein an installation area is provided within the housing, and a helical coil magnetic system, a snap-action magnetic system, or a shunt excitation auxiliary magnetic system is fixed within the housing through the installation area, so that the switching of the circuit breaker's electromagnetic system can be achieved by replacing the helical coil magnetic system, the snap-action magnetic system, or the shunt excitation auxiliary magnetic system; a first shaft pin hole is also provided within the housing; the armature of the snap-action magnetic system is connected to the first shaft pin hole through a shaft pin rod; a reaction spring is sleeved on the shaft pin rod, one end of the reaction spring abutting against the inner wall surface of the armature, and the other end of the reaction spring abutting against a fixing groove provided on the housing.
[0006] As a preferred technical solution of this utility model: both the spiral coil magnetic system and the shunt excitation auxiliary magnetic system are connected to the mounting area through a mounting bracket.
[0007] As a preferred technical solution of this utility model: the installation area includes a base plate, a first baffle is provided above the base plate, and a second baffle is provided to the right of the first baffle; a third baffle is provided above the first baffle, and a fourth baffle is provided above the second baffle; when the mounting frame is installed in the installation area, the base plate supports the mounting frame at the bottom of the mounting frame, the first baffle and the second baffle fix the mounting frame on both sides of the mounting frame, and the third baffle and the fourth baffle abut against the upper end of the mounting frame.
[0008] The beneficial effects of this utility model by adopting the above technical solution are as follows: Because an installation area is provided inside the housing, and the spiral coil magnetic system, the snap-action magnetic system, or the shunt excitation auxiliary magnetic system is fixed in the installation area, the housing can accommodate all three types of magnetic systems without any adjustment. In other words, one housing can serve three purposes. The corresponding magnetic system can be installed as needed before leaving the factory. Therefore, by satisfying the installation of three magnetic systems with a single housing, manufacturers only need to produce one type of housing structure, greatly reducing the production of multiple housings and thus enhancing the market competitiveness of magnetic systems equipped with this housing. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the internal structure of the shell of this utility model;
[0010] Figure 2 This is a schematic diagram of the internal structure of the casing of this utility model when viewed from the front.
[0011] Figure 3 A schematic diagram of the main structure of a helical coil magnetic system;
[0012] Figure 4 A schematic diagram of the main structure of a snap-fit magnetic system;
[0013] Figure 5 A schematic diagram of the main structure of the helical coil magnetic system within the housing;
[0014] Figure 6 This is a schematic diagram of the main structure of the snap-fit magnetic system within the housing;
[0015] Figure 7 A schematic diagram of the main structure of the shunt excitation auxiliary magnetic system within the housing.
[0016] In the diagram: 1. Housing; 2. First shaft pin hole; 3. Base plate; 4. First baffle; 5. Third baffle; 6. Fixing groove; 7. Second baffle; 8. Fourth baffle; 9. Mounting bracket; 10. Armature; 11. Shaft pin; 12. Reaction spring; 13. Helical coil magnetic system; 14. Clamping magnetic system; 15. Shunt excitation auxiliary magnetic system. Detailed Implementation
[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "upper surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 limiting this utility model.
[0018] Please see Figure 1-7 The present invention provides an embodiment of a miniature circuit breaker that facilitates switching of magnetic systems, comprising a housing 1, wherein an installation area is provided inside the housing 1, and a helical coil magnetic system 13, a snap-action magnetic system 14, or a shunt excitation auxiliary magnetic system 15 is fixed inside the housing 1 through the installation area, so that the switching of the electromagnetic system of the circuit breaker can be achieved by replacing the helical coil magnetic system 13, the snap-action magnetic system 14, or the shunt excitation auxiliary magnetic system 15.
[0019] In summary, because an installation area is provided inside the housing 1, and the spiral coil magnetic system 13, the snap-fit magnetic system 14, or the shunt excitation auxiliary magnetic system 15 are fixed in the installation area, the housing 1 can accommodate the spiral coil magnetic system 13, the snap-fit magnetic system 14, or the shunt excitation auxiliary magnetic system 15 without any adjustments. That is, one housing can be used for three purposes. The corresponding magnetic system can be installed as needed before leaving the factory. Therefore, by satisfying the installation of three magnetic systems with one housing, the manufacturer only needs to produce one type of housing, which greatly reduces the production of multiple housings and enhances the market competitiveness of the magnetic system with this housing.
[0020] like Figure 3 Figure 5 Figure 7 As shown, both the spiral coil magnetic system 13 and the shunt excitation auxiliary magnetic system 15 are connected to the mounting area via a mounting bracket 9.
[0021] Specifically, the installation area includes a base plate 3, a first baffle 4 is provided above the base plate 3, and a second baffle 7 is provided to the right of the first baffle 4; a third baffle 5 is provided above the first baffle 4, and a fourth baffle 8 is provided above the second baffle 7; when the mounting frame 9 is installed in the installation area, the base plate 3 supports the mounting frame 9 at the bottom of the mounting frame 9, the first baffle 4 and the second baffle 7 fix the mounting frame 9 on both sides of the mounting frame 9, and the third baffle 5 and the fourth baffle 8 abut against the upper end of the mounting frame 9.
[0022] Based on this, the appropriate magnetic system can be selected for the spiral coil magnetic system 13 and the shunt excitation auxiliary magnetic system 15 before leaving the factory, which helps to reduce the production cost of the housing.
[0023] Similarly, such as Figure 4 and Figure 6 As shown, the housing 1 also has a first shaft pin hole 2; the armature 10 of the snap-fit magnetic system 14 is connected to the first shaft pin hole 2 via a shaft pin rod 11; a reaction spring 12 is sleeved on the shaft pin rod 11, one end of the reaction spring 12 abuts against the inner wall surface of the armature 10, and the other end of the reaction spring 12 abuts against the fixing groove 6 provided on the housing 1. Thus, the snap-fit magnetic system 14 can be selectively installed as needed while operating normally.
[0024] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.
Claims
1. A miniature circuit breaker facilitating a magnetic system switching, characterized by: Includes a housing (1), which has an installation area, and a spiral coil magnetic system (13), a snap-action magnetic system (14), or a shunt excitation auxiliary magnetic system (15) is fixed in the housing (1) through the installation area, so as to realize the switching of the circuit breaker electromagnetic system by replacing the spiral coil magnetic system (13), the snap-action magnetic system (14), or the shunt excitation auxiliary magnetic system (15); The housing (1) is also provided with a first shaft pin hole (2); the armature (10) of the snap-fit magnetic system (14) is connected to the first shaft pin hole (2) through a shaft pin rod (11); the reaction spring (12) is sleeved on the shaft pin rod (11), one end of the reaction spring (12) abuts against the inner wall surface of the armature (10), and the other end of the reaction spring (12) abuts against the fixing groove (6) provided on the housing (1).
2. A small-sized circuit breaker with a magnetic system for easy switching according to claim 1, characterized in that: Both the spiral coil magnetic system (13) and the shunt excitation auxiliary magnetic system (15) are connected to the mounting area via a mounting bracket (9).
3. A miniature circuit breaker for easy switching of magnetic systems according to claim 2, characterized in that: The installation area includes a base plate (3), a first baffle (4) is provided above the base plate (3), and a second baffle (7) is provided on the right side of the first baffle (4); a third baffle (5) is provided above the first baffle (4), and a fourth baffle (8) is provided above the second baffle (7); when the mounting frame (9) is installed in the installation area, the base plate (3) supports the mounting frame (9) at the bottom of the mounting frame (9), the first baffle (4) and the second baffle (7) fix the mounting frame (9) on both sides of the mounting frame (9), and the third baffle (5) and the fourth baffle (8) abut against the upper end of the mounting frame (9).