Patent ID: 6674034
Filing Date: 2004-01-06
Classification: H01H

Abstract:
A press button type safety switch comprising:a housing, said housing having a holding chamber separated by a horizontal partition wall thereof into an upper open chamber and a lower receiving chamber, and a through hole through said horizontal partition wall in communication between said upper open chamber and said lower receiving chamber; a plurality of terminals installed in said lower receiving chamber of said housing and electrically connected to external power supply; a switching mechanism installed in the lower receiving chamber of said housing and controlled to switch on/off the circuit of said terminals; a linkage for switching on/off said switching mechanism, said linkage comprising spring members supported in the upper open chamber of said housing, a press button assembly supported on the spring members in the upper open chamber of said housing, and an actuating mechanism mounted in the through hole of said housing and connected between said press button assembly and said switching mechanism and controlled by said press button assembly to switch on/off said switching mechanism, said actuating mechanism comprising a conical spring mounted on said partition wall, a press member supported on said conical spring and partially inserted into the through hole of said housing, and a seesaw plank pivoted to said housing, said seesaw plank having a guide groove, which receives said press member for enabling said seesaw plank to be biased by said press member to switch on/off said switching mechanism, and a positioning portion disposed at one end thereof and connected to said switching mechanism; wherein: said linkage comprises at least one locating rod; said seesaw plank comprises at least one top hook for hooking on said at least one locating rod of said press button assembly to hold said press button assembly in a position where the spring members in the upper open chamber of said housing maintained compressed by said press button assembly when said press button assembly pressed by the user to switch on said switching mechanism.