Slide switch
AssigneeKabushiki Kaisha Tokai Rika Denki Seisakusho
InventorMinoru Nishio
Life of this patent
Estimating the term…
Abstract
A slide switch opening and closing a circuit for supplies electricity to a load by making and breaking contact between a movable contact and a stationary contact. The stationary contact is integrally formed with an arc generating portion for generating an arc when the circuit is opened or closed. The arc generating portion protrudes in the direction of movement of the movable contact and has a width which gradually decreases from its base portion towards its tip portion. The slide switch is capable of preventing the arc generating portion and the movable contact from having a groove due to wear.
Claims16
A slide switch for opening and closing a circuit for supplying electricity to a load comprising:
- a movable contact which is slidable;
- and
- a stationary contact which said movable contact contacts and separates therefrom, said stationary contact being integrally formed with an arc generating portion for generating arc between said arc generating portion and said movable contact when said circuit is opened or closed and including an insulating section, said insulating section including a recess in said stationary contact,
- said arc generating portion protruding in a direction in which said movable contact moves and defining a base portion near a protrusion from the stationary contact and a tip portion opposite from the base, said arc generating portion having a width which gradually decreases from its base portion towards its tip portion, wherein said recess includes a substantially first portion, which is substantially complementary in shape to said arc generating portion.
A slide switch for opening and closing a circuit for supplying electricity to a load comprising:
- a first movable contact which is provided with first and second contact portions and which is slidable;
- a second movable contact which is provided with third and fourth contact portions and which is slid together with said first movable contact;
- a first negative stationary contact which said first contact portion contacts and separates therefrom;
- a first intermediate stationary contact which said first and second contact portions contact and separate therefrom,
- said first intermediate stationary contact being integrally formed with a first arc generating portion for generating arc between said first arc generating portion and said first movable contact when said circuit is opened or closed and including an insulating section, said insulating section including a recess in said first intermediate stationary contact, wherein said first arc generating portion protrudes in a direction in which said first movable contact moves and defining a base portion near a protrusion from the stationary contact and a tip portion opposite from the base, said arc generating portion has a width which gradually decreases from its base portion towards its tip portion, wherein said recess in said first intermediate stationary contact includes a substantially bounded first portion, which is substantially complementary in shape to said first arc generating portion;
- a common positive stationary contact which said second and third contact portion contact and separate therefrom;
- a second intermediate stationary contact which said third and fourth contact portions contact and separate therefrom, said second intermediate stationary contact being integrally formed with a second arc generating portion for generating arc between said second arc generating portion and said second movable contact when said circuit is opened or closed and including an insulating section, said insulating section including a recess in said second intermediate stationary contact, wherein said second arc generating portion protrudes in a direction in which said second movable contact moves and defining a base portion near a protrusion from the stationary contact and a tip portion opposite from the base, said arc generating portion has a width which gradually decreases from its base portion towards its tip portion, wherein said recess in said second intermediate stationary contact includes a substantially bounded first portion, which is substantially complementary in shape to said second arc generating portion;
- and
- a second negative stationary contact which said fourth contact contacts and separates therefrom.
Dependencies are inferred from the claim text.