Switchably controlled liquid sealed type vibration isolator

A vibration isolator comprising:

• a fitting member having a first portion for attachment to one of a vibrating body and a support thereof and a second portion;
• an elastic base member having a first side fixed to the second portion of the first fitting member and a second side;
• a tubular member having a first end fixed to the second side of the elastic base member and a second end;
• a partition device, disposed in the tubular member, having an outer diameter, a first partition side opposing the elastic base member defining a main liquid chamber therebetween, and a second partition side opposite said first partition side, said partition device defining an orifice communicating with the main liquid chamber;
• said partition device including a main partition member and a partition plate, said partition plate forming the first partition side, defining an opening for the orifice to communicate with the main liquid chamber, and having side portions fixed to a peripheral side of the main partition member and contacting an inner circumferential surface of the tubular member to seal the main liquid chamber with the exception of the orifice;
• a diaphragm disposed opposing the second partition side and defining an auxiliary liquid chamber communicated with the main liquid chamber via said orifice, said diaphragm including an annular reinforcing plate at a periphery thereof;
• another fitting member for attachment to the other one of the vibrating body and the support thereof, the another fitting member being disposed opposing said diaphragm to define an air chamber;
• and
• said second end of said tubular member being swaged to clamp said annular reinforcing plate of said diaphragm, and said another fitting member so that they are mutually fixed in place together.