TWM580793U - Fast ON structure of small circuit breaker - Google Patents

Abstract

A fast throwing structure of a small circuit breaker includes a bottom plate, an upper cover is coupled to the bottom plate, a handle is pivotally arranged on the bottom plate and is adjacent to the upper cover, a spring shaft is provided in the bottom plate, a mechanism component and a return component And a contact are installed in the bottom plate; the mechanism assembly includes a support shaft, a support seat, a movable plate, a movable element and a tension spring; the return assembly includes a return lever and an upper link 1. A U-shaped connecting rod and a trip lever; the contactor corresponds to the end of the movable member and is provided with a contact; the fast-throwing structure of the small circuit breaker is characterized by a fast-throwing connecting rod, which is installed on the The bottom plate has a coupling portion, the coupling portion is sleeved in the groove on the handle, a lower end portion is disposed at the lower end of the quick-throw link, and an elastic portion extends from one side of the quick-throw link.

Description

Quick throw structure of small circuit breaker

This creation is about a circuit breaker, especially a fast-throw structure of a small circuit breaker.

Miniature circuit breaker, which can be applied to the main switch and sub-current control switch used on the wiring, is an important component for protecting electrical appliances, which is mainly used as short circuit protection and to prevent serious overload. The motor load line protection on industrial machines will also be specified Use a circuit breaker as one of the protection devices. When the circuit breaker detects a short circuit, leakage, or severe overload, the circuit breaker can immediately trip to protect the circuit and electrical appliances.

As shown in FIG. 1 , the conventional miniature circuit breaker includes a bottom plate 60, a handle 61, a supporting seat 62, a mover 63, a main fulcrum 64, a return lever 65, a return torsion spring 66, and one or two alloy plates 67 1. A contact 68 and a contact 69. The handle 61 is pivotally mounted on the bottom plate 60. The support 62 and the movable element 63 are combined with the bottom plate 60 and sleeved on the main fulcrum 64. After the return lever 65 and the return torsion spring 66 are combined, they are sleeved on a fulcrum (not shown) of the support base 62, the contact 68 is connected to the bottom plate 60, and the contact 69 is disposed on the contact 68.

The support base 62 and the movable member 63 are combined with a torsion spring (not shown) and assembled on the main fulcrum 64. However, due to the non-linear torsion force of the torsion spring, the movable member 63 cannot be flatly connected with The contact 69 of the contact 68 is engaged, resulting in poor contact, unstable contact pressure and The temperature rise is relatively high; at the same time, the conventional miniature circuit breakers have unstable mechanism operation, which is likely to cause poor insulation withstand voltage during the short circuit test and poor reproducibility during the trip test, resulting in time-consuming heavy work.

Based on the above reasons, there is still room for improvement in the conventional technology. In view of this, the creator is actively researching, adding years of experience in the development of related products, and after continuous experimentation and improvement, this creation has finally been developed.

The main purpose of this creation is to provide a fast-throw structure for small circuit breakers. During the short circuit, the mover is in rapid contact with the contactor, reducing the stagnation time of the mover and the contactor, and reducing the short circuit arc light to reduce Mover loss to increase short-circuit capacity.

In order to achieve the above purpose, the present invention provides a quick-release structure for a small circuit breaker, which includes a bottom plate, an upper cover coupled to the bottom plate, a handle pivotally arranged on the bottom plate and adjacent to the upper cover, and a spring shaft is provided on the In the bottom plate, a mechanism component, a return component and a contactor are all installed in the bottom plate; the mechanism component includes a support shaft, a support base is pivotally combined with a movable sub-fixing plate, and a limit is provided on the support base The movable part fixing plate is provided with a front end part. After the support base is combined with the movable part fixing plate, the supporting seat is sleeved on the supporting shaft, and a movable part is fixed on the lower end of the movable part fixing plate. One end of a tension spring is fixed on the spring shaft of the bottom plate, and the other end is fixed on the movable sub-fixing plate; the return assembly includes a return lever, and an upper connecting rod is provided on the support seat and in contact with the return lever, A U-shaped connecting rod is sleeved on the handle at one end, and the upper connecting rod is sleeved at the other end, one end of the tripping lever is set in the bottom plate, and the return lever is sleeved at the other end; There is a contact, which is set corresponding to the end of the mover, so that the mover and the contact can abut against each other; the quick-throw structure of the small circuit breaker is characterized by: a quick-throw connecting rod, installed In the bottom plate, there is a joint part, the joint The part is sleeved in the groove on the handle, the lower end is arranged at the lower end of the quick-throw connecting rod, and an elastic part is extended from one side of the fast-throw connecting rod.

In order to further understand the characteristics and technical content of this creation, please refer to the following detailed description and drawings related to this creation. However, the drawings are for reference and explanation only, and are not intended to limit the creation.

(This creation)

10‧‧‧Bottom plate

11‧‧‧Cover

12‧‧‧handle

13‧‧‧Spring shaft

20‧‧‧Institutional components

21‧‧‧Support shaft

22‧‧‧Support seat

221‧‧‧Limiting Department

23‧‧‧movable fixed plate

231‧‧‧Front end

24‧‧‧movable

25‧‧‧tension spring

30‧‧‧Reset components

31‧‧‧Return lever

32‧‧‧Upper connecting rod

33‧‧‧U-shaped connecting rod

34‧‧‧trip lever

40‧‧‧Contact

41‧‧‧Contact

50‧‧‧Quick shot link

51‧‧‧Joint

52‧‧‧Lower end

53‧‧‧Elastic Department

(Conventional Technology)

60‧‧‧Bottom plate

61‧‧‧handle

62‧‧‧Support

63‧‧‧movable

64‧‧‧Master pivot

65‧‧‧Return lever

66‧‧‧Return torsion spring

67‧‧‧Two alloy plates

68‧‧‧Contact

69‧‧‧Contact

FIG. 1 is a perspective view of a conventional technology.

Fig. 2 is an exploded perspective view of the bottom plate and the upper cover of the quick-release structure of the miniature circuit breaker.

Fig. 3 is an exploded perspective view of the fast throwing structure of the miniature circuit breaker.

Figure 4 is a front view of the fast-throw structure of the miniature circuit breaker.

FIG. 5 is a schematic front view of some components of a quick-release structure for creating a miniature circuit breaker.

Please refer to FIGS. 2 to 5. FIG. 2 is a perspective exploded view of a bottom plate and an upper cover of a quick-release structure for creating a miniature circuit breaker, and FIG. 3 is a perspective exploded view of a quick-release structure for creating a miniature circuit breaker. FIG. 4 For the front view of the quick-release structure of the miniature circuit breaker, FIG. 5 is a schematic front view of some components of the quick-release structure of the miniature circuit breaker. This creation relates to a quick-release structure of a small circuit breaker, including a bottom plate 10, an upper cover 11 coupled to the bottom plate 10, the handle 12 is pivotally mounted on the bottom plate 10 and adjacent to the upper cover 11, a spring shaft 13 is provided In the bottom plate 10, a mechanism component 20, a return component 30 and a contactor 40 are all installed in the bottom plate 10.

The mechanism assembly 20 includes a support shaft 21, a support seat 22 and a movable element The fixing plate 23 is pivotally connected, the supporting seat 22 is provided with a limiting portion 221, the movable sub-fixing plate 23 is provided with a front end portion 231, and the supporting base 22 is combined with the movable sub-fixing plate 23 to form the supporting seat 22 is sleeved on the support shaft 21, a movable element 24 is fixed to the lower end of the movable element fixing plate 23, a tension spring 25 is fixed at one end to the spring shaft 13 of the bottom plate 10, and the other end is fixed to the movable element fixing plate 23 on.

The return assembly 30 includes a return lever 31, an upper link 32 is disposed on the support base 22, and is in contact with the return lever 31 at the same time, a U-shaped link 33 is sleeved on one end of the handle 12, and the other end is sleeved In the upper connecting rod 32, one end of the trip lever 34 is disposed in the bottom plate 10, and the other end is sleeved on the return rod 31.

The contactor 40 is provided with a contact 41 corresponding to the end of the movable member 24 so that the movable member 24 and the contact 41 can abut against each other.

The quick-release structure of the miniature circuit breaker is characterized by: a quick-release link 50, installed in the bottom plate 10, has a coupling portion 51, the coupling portion 51 is sleeved in the groove on the handle 12, a click The end portion 52 is disposed at the lower end of the fast-throw link 50, and an elastic portion 53 extends from the side of the fast-throw link 50.

The handle 12 is pushed by an external force, so that the U-shaped link 33 is linked and drives the upper link 32 to engage the return lever 31, driving the mechanism assembly 20 to rotate clockwise, when the mechanism assembly 20 rotates to a critical point, the The front end 231 of the movable fixed plate 23 contacts the lower end 52 of the quick-release link 50 to store energy, the handle 12 continues to rotate, and the elastic portion 53 of the quick-release link 50 restricts the quick-release link 50 from being The handle 12 is driven, and the limit portion 221 of the support seat 22 suppresses the twisting of the quick-connect link 50. The handle 12 quickly drives the quick-connect link 50 so that the quick-connect link 50 and the movable plate 23 Disengaged, so the mechanism assembly 20 instantly releases energy, so that the movable element 24 and the movable element 24 The contactor 40 closes quickly and reaches the ON state.

In summary, the quick-release structure of the small circuit breaker created by this invention can improve the problem of poor reproducibility during the trip test and lead to time-consuming heavy work, and can make the mover and the contactor quickly during the circuit breaker input process during short circuit. Contact, reduce the stagnation time of the mover and the contactor, reduce the short circuit arc to reduce the loss of the mover, and improve the short circuit capacity.

The above-mentioned embodiments are only examples for the convenience of description, and the scope of the rights claimed in this creation should be subject to the scope of the patent application, and not limited to the above-mentioned embodiments.

Although this creation has been disclosed as above with the preferred embodiment, it is not used to limit this creation. Anyone who is familiar with this technology can make some changes and retouching without departing from the spirit and scope of this creation, so this creation The scope of protection shall be as defined in the scope of the attached patent application.

Claims (1)

A fast throwing structure of a small circuit breaker includes a bottom plate, an upper cover is coupled to the bottom plate, the handle is pivotally arranged on the bottom plate and is adjacent to the upper cover, a spring shaft is provided in the bottom plate, a mechanism assembly, a return The assembly and a contact are both installed in the bottom plate; the mechanism assembly includes a support shaft, a support seat and a movable sub-fixing plate are pivotally combined, and a limit portion is provided on the support base, the movable sub-fixing plate A front end portion is provided on the top, and the support seat is combined with the movable plate to fix the support seat on the support shaft, a movable element is fixed to the lower end of the movable plate, and an end of a tension spring is fixed to the bottom plate The other end of the spring shaft is fixed on the movable plate; the return assembly includes a return rod, an upper connecting rod is arranged on the support seat, and is in contact with the return rod, and a U-shaped connecting rod is sleeved at one end Connected to the handle, the other end is sleeved on the upper connecting rod, one end of the trip lever is set in the bottom plate, and the other end is sleeved on the return lever; and the contactor is provided with a contact point, the contact point corresponds to can The end of the mover is arranged so that the mover and the contact can abut each other; the quick-throw structure of the small circuit breaker is characterized by a quick-throw connecting rod, which is installed in the bottom plate and has a joint part The coupling part is sleeved in the groove on the handle, a lower end is provided at the lower end of the quick-throw connecting rod, and an elastic part extends from one side of the quick-throw connecting rod.