Small-size high-voltage-resistance electromagnetic relay

Abstract

The invention discloses a small-size high-voltage-resistance electromagnetic relay. The small-size high-voltage-resistance electromagnetic relay comprises a shell, a base, a movable reed, a static reed, a pushing clamp and a magnetic circuit portion; the shell is connected with the base; the bottom portions of the static reed, the movable reed and the magnetic circuit portion are installed on thebase, the pushing clamp is cooperated between the movable reed and the magnetic circuit portion; a large distance is arranged between the movable reed and the static reed; a high wall is protruded atthe base upwards, the pushing clamp comprises a vertical piece and a push arm horizontally connected to the vertical piece, the top portion of the vertical piece of the pushing clamp is rotationally installed at the top portion of the high wall of the base through a rotating shaft, and the push arm of the pushing clamp is cooperated with the position, close to the root, of the movable reed. The small-size high-voltage-resistance electromagnetic relay can achieve high pressure resistance under the condition of a small volume, can avoid early fatigue fracture of the movable reed due to large-stroke movement, and can avoid the phenomenon that a pushing clamp falls off to cause product failure under the condition of a large vibration impact.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to a small-volume high-voltage-resistant electromagnetic relay. Background technique [0002] The relay is an electronic control device, which has a control system (also known as the input circuit) and a controlled system (also known as the output circuit), usually used in automatic control circuits, it actually uses a smaller current to control a larger An "automatic switch" of electric current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. [0003] Electromagnetic relays have been widely used in various fields. In some application fields, there are high requirements for withstand voltage between contacts, between contacts and coils, and between contact groups. For example, in 5G power system applications Among them, there are higher requirements for electromagnetic relays. Usually, it is required that the lightning...

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Problems solved by technology

[0003] Electromagnetic relays have been widely used in various fields. In some application fields, there are high requirements for withstand voltage between contacts, between contacts and coils, and between contact groups. For example, in 5G power system applications Among them, there are higher requirements for electromagnetic relays. Usually, it is required that the lightning strike voltage between disconnected contacts must meet more than 10KV. If two or more contact groups are involved, the lightning strike resistance between contact groups The voltage also needs to meet more than 10KV, and the lightning strike voltage between the contact and the coil also needs to meet more than 10KV. The electromagnetic relay of the prior art usually cannot meet the above requirements. In the prior art, products with a withstand voltage of more than 10KV are all used Circuit breakers are large in size and expensive, and 5G power supply system equipment is mainly installed on street light poles, building exterior walls, etc., requiring a relatively small volume, and is used in the control of a single 5G power supply. The number of relays is relatively large, so the volume is also required to be small enough, the smaller the better, which makes the circuit breaker of the prior art unable to be adopted

Therefore, it is urgent to design a small-volume high-voltage electromagnetic relay to adapt to applications such as 5G power supply systems, and the electromagnetic relay must have a 10KV withstand voltage capability, which requires a relatively large movement stroke of the moving reed, so The mechanical fatigue characteristics drop sharply, and the movable reed of the existing structure is prone to early fatigue fracture, and it is difficult for the push card of the prior art to push the movable reed to move in a large stroke under a compact structure, and the movement stroke is large. Finally, in the case of large vibration and shock, it is easy to cause the push card to fall off and cause product failure.

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