THREE-STAGE SWITCHING SEESAW SWITCH AND THREE-STAGE SWITCHING SEESAW SWITCH DEVICE USING IT
Document Type and Number:
Japanese Patent JP3039176
PURPOSE: To reduce the number of constitutive part items, facilitate downsizing, and realize inexpensive constitution in a mid-point return type three-stage switching seesaw switch and a three-stage switching seesaw switch device formed by using this to carry out three-stage switching operation in respective seesaw directions of a seesaw type operation key.
CONSTITUTION: A vertically movable driving plate 40 is arranged between two swinging members 25a and 25b on an under surface of an operation key 21 and four sets of switch contact, points (29a, 36b) (29b, 36b) (30a, 37a) and (30b, 37b). Thereby, two-stage switching operation whose switching order is changed by seesaw directions of the operation key 21 is carried out to the two sets of contact points (30a, 37a) and (30b, 37b) among the four sets of switch contact points, and the number of constitutive part items is reduced, and downsizing and cost reduction are realized.
March 03, 2000
January 18, 1993
MATSUSHITA ELECTRIC IND CO LTD
H01H23/00; H01H23/30; (IPC1-7): H01H23/00; H01H23/30