Double-contact parallel circuit breaker mechanism

Abstract

The utility model discloses a double-contact parallel circuit breaker mechanism, which comprises a contact support, one side of the contact support is provided with a jump pin, the jump pin is connected with a U-shaped connecting rod, the other side of the U-shaped connecting rod is connected with a handle, the contact support is provided with a fixed shaft, the contact support is connected with a moving contact through the fixed shaft, the fixed shaft is provided with a contact double torsion spring, and the moving contact is connected with the contact double torsion spring. One side of the contact double-torsion spring is hung on the inner wall of the moving contact, the other side, corresponding to the contact double-torsion spring, of the contact support is provided with a lock catch groove, the other side of the contact double-torsion spring is arranged in the lock catch groove, a lock catch is movably installed on the contact support, and the lock catch is meshed with the jump pin; the moving contact comprises a first moving contact and a second moving contact. The contact support, the first moving contact and the second moving contact form a parallel double-contact system through the fixing shaft, the contact double-torsion spring, the lock catch and the jump pin. According to the utility model, the closing contact area is doubled, the contact resistance is reduced, the temperature rise of a circuit breaker product is greatly reduced, and the reliability of the product is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, specifically relating to a dual-contact parallel circuit breaker mechanism. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions and close, carry, and interrupt current under abnormal circuit conditions within a specified time. Circuit breakers are used for overload and short-circuit protection of lighting, power distribution lines and equipment in office buildings, residences and similar buildings, and can also be used for infrequent switching and connection of lines.

[0003] The operating mechanism of a miniature circuit breaker includes a contact bracket, trip latch, latch, moving contact, operating handle, and connecting rod. The contact bracket is generally movably connected to the housing via a rotating shaft, while the latch is movably connected to the contact bracket via another rotating shaft.

[0004] Most current circuit breakers consist of one operating mechanism and one moving contact. An 18mm wide circuit breaker requires both an operating mechanism and a moving contact. In single-contact circuit breakers, the moving contact is 2mm thick, resulting in a small contact area between the moving and stationary contacts, high closing contact resistance, increased product temperature, and aging and deformation of the contact support over time. This leads to a decrease in the final pressure of the product and affects its reliability. Therefore, there is an urgent need for a dual-contact parallel circuit breaker mechanism to solve these problems. Utility Model Content

[0005] In view of the problems mentioned above in the background art, the purpose of this utility model is to provide a double-contact parallel circuit breaker mechanism.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0007] A dual-contact parallel circuit breaker mechanism includes a contact bracket, a trip latch on one side of the contact bracket, a U-shaped connecting rod connected to the trip latch, a handle connected to the other side of the U-shaped connecting rod, a fixed shaft mounted on the contact bracket, a moving contact connected to the contact bracket via the fixed shaft, a double torsion spring mounted on the fixed shaft, one side of the double torsion spring suspended from the inner wall of the moving contact, a locking groove on the other side of the contact bracket corresponding to the double torsion spring, the other side of the double torsion spring being disposed within the locking groove, a locking buckle movably mounted on the contact bracket, and the locking buckle engaging with the trip latch;

[0008] The moving contact includes a first moving contact and a second moving contact. The contact bracket, the first moving contact, and the second moving contact form a parallel double contact system through a fixed shaft, a double torsion spring, a locking buckle, and a jump buckle.

[0009] Furthermore, the bottom of the contact support is designed with an arc shape. This structural design allows it to cooperate with the base to prevent electric arc from being ejected onto the mechanism and to block the upward airflow channel.

[0010] Furthermore, the contact support has fixed slots on both sides, and one side of the first moving contact and the second moving contact are rotatably mounted in the fixed slots. This structural design facilitates the movable installation of the first moving contact and the second moving contact.

[0011] Furthermore, the first and second moving contacts are symmetrically connected in parallel within a fixed slot, with precise contact between them. A bend is provided at the midpoint between the first and second moving contacts, with an inward offset of 1mm. This structural design improves installation stability.

[0012] Furthermore, the latch has an arc-shaped clearance on the side near the double torsion spring of the contact. This structural design ensures that the latch will not affect its reset upon release.

[0013] The beneficial effects of this utility model are as follows: The parallel operation mechanism of the double contact of this utility model, by setting contact support, jumper, U-shaped connecting rod, handle, fixed shaft, moving contact, first moving contact, second moving contact, bending part, contact double torsion spring, locking groove, locking and fixed groove, double contact area is doubled during operation and closing, reducing contact resistance, significantly reducing the temperature rise of circuit breaker products, and enhancing product reliability. Attached Figure Description

[0014] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0015] Figure 1 This is a schematic diagram of the main structure of a dual-contact parallel circuit breaker mechanism according to an embodiment of the present invention;

[0016] Figure 2 This is a partial side view of a dual-contact parallel circuit breaker mechanism according to an embodiment of the present invention;

[0017] Figure 3 This is a rear view structural diagram of a dual-contact parallel circuit breaker mechanism according to an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the contact support structure of a dual-contact parallel circuit breaker mechanism according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the locking structure of a dual-contact parallel circuit breaker mechanism according to an embodiment of the present invention;

[0020] The symbols for the main components are explained below:

[0021] 1. Contact bracket, 2. Jumper, 3. U-shaped connecting rod, 4. Handle, 5. Fixed shaft, 6. Moving contact, 601 first moving contact, 602 second moving contact, 603 bending part, 7. Contact double torsion spring, 8. Locking groove, 9. Locking, 10. Fixed slot, 11. Reset elastic seat, 12. Reset spring. Detailed Implementation

[0022] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1-5 As shown, this utility model discloses a double-contact parallel circuit breaker mechanism. One side of the contact bracket 1 is provided with a jump buckle 2, the jump buckle 2 is connected to a U-shaped connecting rod 3, and the other side of the U-shaped connecting rod 3 is connected to a handle 4. The contact bracket 1 is equipped with a fixed shaft 5, and the contact bracket 1 is connected to a moving contact 6 through the fixed shaft 5. A double torsion spring 7 is installed on the fixed shaft 5. One side of the double torsion spring 7 is suspended from the inner wall of the moving contact 6. The contact bracket 1 is provided with a locking groove 8 on the other side of the corresponding double torsion spring 7, and the other side of the double torsion spring 7 is set in the locking groove 8. A locking buckle 9 is movably installed on the contact bracket 1, and the locking buckle 9 engages with the jump buckle 2.

[0024] The moving contact 6 includes a first moving contact 601 and a second moving contact 602. The contact support 1, the first moving contact 601 and the second moving contact 602 form a parallel double contact system through a fixed shaft 5, a double torsion spring 7, a locking buckle 9 and a jump buckle 2.

[0025] Preferably, the bottom of the contact support 1 is designed with an arc shape. This design allows it to work with the base to prevent electric arc from hitting the mechanism and to block the upward airflow path. However, other structural shapes of the contact support 1 can also be considered depending on the specific circumstances.

[0026] Preferably, the contact bracket 1 has fixing slots 10 on both sides, and one side of the first moving contact 601 and the second moving contact 602 is rotatably installed in the fixing slot 10. This structural design facilitates the movable installation of the first moving contact 601 and the second moving contact 602. In practice, other mounting structure shapes for the first moving contact 601 and the second moving contact 602 can also be considered depending on the specific circumstances.

[0027] Preferably, the first moving contact 601 and the second moving contact 602 are symmetrically connected in parallel within the fixed slot 10, with the first moving contact 601 and the second moving contact 602 precisely fitted together. A bent portion 603 is also provided at the midpoint between the first moving contact 601 and the second moving contact 602, with an inward deflection of 1mm. This structural design improves installation stability. In practice, other structural shapes for the first moving contact 601 and the second moving contact 602 can also be considered depending on the specific circumstances.

[0028] Preferably, the latch 9 has a rounded recess on the side near the double torsion spring 7. This structural design ensures that the latch 9 will not affect its reset upon release. In practice, other structural shapes of the latch 9 can also be considered depending on the specific circumstances.

[0029] In this embodiment, there are fixed slots 10 on both sides of the contact bracket 1. The first moving contact 601 and the second moving contact 602 are arranged on both sides of the contact bracket 1 and fixed to the contact bracket 1 by the contact double torsion spring 7. The other end of the contact double torsion spring 6 is hung in the locking slot 8 of the contact bracket 1. One end of the U-shaped connecting rod 3 is connected to the handle 4, and the other end is placed in the jump buckle 2. The jump buckle 2 engages with the locking buckle 9. The locking buckle 9 is installed on the contact bracket 1. When the handle 4 is operated, the contact bracket 1 rotates and drives the moving contact 6 to move, thereby realizing the opening and closing of the circuit breaker.

[0030] Among them, the double torsion spring 7 rotates around the center of the fixed shaft 5 on the contact support 1, and the other two spring corners are suspended in the inner wall of the moving contact and the locking groove 8. After the circuit breaker closing moving contact 6 rotates, the double torsion spring 7 of the linkage contact is deformed. The torsion double torsion spring 7 of the contact provides the initial pressure and final pressure to the moving contact 6.

[0031] The rotation center of the latch 9 is set on the fixed shaft 5 of the contact bracket 1, and the latch rotates around it. The rotation center of the jumper 2 is set on the fixed shaft 5 of the contact bracket 1, and it rotates around it, driven by the U-shaped connecting rod 3.

[0032] The contact bracket 1 is also equipped with a reset elastic seat 11, and a reset spring 12 is installed inside the reset elastic seat 11 so that it can be automatically reset after use.

[0033] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A mechanism for a double-contact parallel circuit breaker, characterized in that: The device includes a contact support (1), a jump buckle (2) on one side of the contact support (1), a U-shaped connecting rod (3) connected to the jump buckle (2), a handle (4) connected to the other side of the U-shaped connecting rod (3), a fixed shaft (5) installed on the contact support (1), a movable contact (6) connected to the contact support (1) through the fixed shaft (5), a double torsion spring (7) installed on the fixed shaft (5), one side of the double torsion spring (7) suspended on the inner wall of the movable contact (6), a locking groove (8) on the other side of the contact support (1) corresponding to the double torsion spring (7), the other side of the double torsion spring (7) set in the locking groove (8), a locking buckle (9) movably installed on the contact support (1), and the locking buckle (9) engaging with the jump buckle (2); The moving contact (6) includes a first moving contact (601) and a second moving contact (602). The contact support (1), the first moving contact (601) and the second moving contact (602) form a parallel double contact system through a fixed shaft (5), a double torsion spring (7), a latch (9) and a jumper (2).

2. The mechanism of a double-contact parallel circuit breaker according to claim 1, characterized in that: The bottom of the contact support (1) is set in an arc shape.

3. The mechanism of a double-contact parallel circuit breaker according to claim 2, characterized in that: The contact bracket (1) has fixed slots (10) on both sides, and the first moving contact (601) and the second moving contact (602) are rotatably installed in the fixed slots (10).

4. The mechanism of a double-contact parallel circuit breaker according to claim 3, characterized in that: The first moving contact (601) and the second moving contact (602) are symmetrically connected in parallel in the fixed slot (10). The first moving contact (601) and the second moving contact (602) are precisely fitted together. A bending part (603) is provided at the middle position of the first moving contact (601) and the second moving contact (602), and the bending inner deviation is 1mm.

5. The mechanism of a double-contact parallel circuit breaker according to claim 4, characterized in that: The latch (9) has an arc-shaped clearance on the side near the contact double torsion spring (7).

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