Oscillating arm type tripolar on-off apparatus for leakage protecting plug

Abstract

The invention relates to a swinging-arm three-pole on-off device of an earth leakage protective socket, which belongs to the technical field of protective devices of low-voltage electrical apparatus, and comprises a base, a contact mechanism which is formed by a ground wire contact pair, a live conductor contact pair and a neutral conductor contact pair, a circuit board, an electromagnetic trip drive mechanism, a trip mechanism and a reset push button. The invention is characterized by further comprising a swing frame which is arranged on the base, the swing frame is connected with the trip mechanism, and one side of one end of the swing frame is corresponding to and matched with the live conductor contact, and the other side is corresponding to and matched with the neutral conductor contactor, and the middle portion of the other end of the swing arm is corresponding to and matched with a ground wire contact. The invention has the advantages that the swinging-arm three-pole on-off device can achieve the interlocked closing and disconnecting of a ground wire, a live conductor and a neutral conductor, and the ground wire contact can be closed before the live conductor contact and the neutral conductor contact when in closing, and the live conductor contact and the neutral conductor contact are disconnected before the ground wire contact when in breaking, and the swinging-arm three-pole on-off device is beneficial for fully playing the function of protecting electric apparatus and personal safety.

Description

technical field [0001] The invention belongs to the technical field of protection devices for low-voltage electrical appliances, and in particular relates to a swing-arm type three-pole on-off device for a leakage protection plug. Background technique [0002] In families, schools, offices, and even public places, the use of various electrical appliances is increasing. On the one hand, it shows that people's material life has improved and office conditions have improved, but on the other hand, there are many hidden dangers of loss of safety. The potential safety hazards mentioned here mainly include the following aspects: first, the poor quality of the line causes the electrical shell to be electrified; second, the user lays the line out of specification; Among the above-mentioned hidden dangers, the electrification of the electrical shell and the ground wire is the most prominent, resulting in many electric shock accidents and / or burning of electrical appliances. The leaka...

AI Technical Summary

Problems solved by technology

[0004] Perhaps people are fully aware that only breaking the live wire and the neutral wire of the two poles is not enough to reflect safety, and only breaking the ground wire at the same time can guarantee safety. However, since this three-pole on-off device closes the ground contact by using an additional contact spring alone, during the closing process, the ground contact The reliability of the closing contact is not ideal, and there are unfavorable factors that affect the reliable grounding of electrical appliances, because the closing action of the ground contact is not linked with the closing action of the live contact and the neutral contact, and thus cannot be reflected in the closing action. During the process, the ground wire contact is closed before the live wire contact and the neutral wire contact; on the contrary, in the breaking process, the live wire contact and the neutral wire contact cannot be disconnected before the ground wire contact

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