US 4,231,007 AGranted

High voltage switch for cooking apparatus

AssigneeMatsushita Electric Industrial Co., Ltd.

InventorsJunzo Tanaka, Chikao Urashima

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Abstract

A high voltage switch for use in a microwave oven is disclosed which switches a high voltage by an external electric signal. The high voltage switch includes a slider guide chamber of insulative material between a contact making and breaking chamber for switching the high voltage and an electromagnet device to which a low voltage is applied and which serves as a power source for making and breaking the contact, so that the high voltage section is isolated from the low voltage section. An insulative slider extends through the slider guide chamber, and an armature which is directly driven by the electromagnet device and a conducting movable member having a movable contact mounted in the contact making and breaking chamber are linked by the insulative slider. The armature and the conducting movable member are pivotably mounted at their ends so that the drive operation by the electromagnet device is amplified to break the contact. As a result, a small electromagnet device of the A.C. drive type by used resulting in the remarkable improvement of insulation ability, durability and reliability and a simple and compact structure.

Claims12

Dependent claims

A high voltage switch comprising:

a contact making and breaking chamber made of insulative material for accommodating a conducting movable member carrying a movable contact for switching a high voltage and a stationary contact member carrying a stationary contact, said conducting movable member being made of a resilient material having at one end a U-shaped hinge portion and having at the other end said movable contact, said one end of said conducting movable member having the U-shaped portion being fixed to a wall of said contact making and breaking chamber thereby to maintain normally closed said movable and said stationary contacts by a resilient force exerted by the U-shaped hinge portion;
an electromagnet device having a movable aramture pivotably supported at one end thereof by a yoke;
an elongated slider made of insulative material and having one end coupled to a free end of said movable armature and having the other end coupled to said conducting movable member for transmitting a driving force of said electromagnetic device to said conducting movable member;
a slider guide chamber made of insulative material for guiding said elongated insulative slider and for insulatively isolating said contact making and breaking chamber from said electromagnetic device, said slider guide chamber having apertures formed in opposite walls for slidably guiding therethrough said elongated insulative slider and for enclosing substantially the entire length of said elongated insulative slider in a dust-proof manner.

1 more element

A high voltage switch comprising:

a contact making and breaking chamber made of insulative material for accommodating a conducting movable member carrying a movable contact for switching a high voltage and a stationary contact member carrying a stationary contact, said conducting movable member being made of a resilient material and having one end fixed to a wall of said contact making and breaking chamber and having at the other end said movable contact thereby to maintain normally closed said movable and said stationary contacts by a resilient force exerted by the resilient material;
an electromagnetic device having a movable armature pivotably supported at one end thereof;
an elongated slider made of insulative material and having one end coupled to a free end of said movable armature and having the other end coupled to said conducting movable member for transmitting a driving force of said electromagnetic device to said conducting movable member;
a slider guide chamber made of insulative material for guiding said elongated insulative slider and for insulatively isolating said contact making and breaking chamber for said electromagnetic device, said slider guide chamber having apertures formed in opposite walls for slidably guiding therethrough said elongated insulative slider and for enclosing substantially the entire length of said elongated insulative slider in a dust-proof manner.

1 more element

Dependencies are inferred from the claim text.