JP2005273738A5 - - Google Patents

Claims (3)

A main body having a gas flow path and a plug sliding surface inside;
A stopper that slides on the sliding surface of the stopper and opens and closes the gas flow path;
A spring for biasing the plug body into the main body;
A stopper for locking the spring in the body;
A knob for moving the plug;
A coupling member for coupling the knob and the stopper;
A gas stopper comprising:
The knob is rotatably attached to the end of the main body, and is engaged with the plug body so as not to be relatively rotatable.
An engagement portion is provided between the knob and the main body so that a part of the knob and a part of the main body are in contact with each other to limit a rotation range of the plug body. Gas stopper to do. The main body has a cylindrical portion formed with an arc-shaped notch step portion to which the knob is attached;
  The knob is formed with a knob projection that moves along the notch step when the knob is turned.
  2. The gas plug according to claim 1, wherein a rotation range of the plug body is limited by abutment between the knob convex portion and end surfaces of both ends of the notch step portion.   An annular groove is formed on the inner periphery of the cylindrical portion of the main body,
  The gas stopper according to claim 2, wherein both ends of the stopper enter the annular groove to prevent the knob from coming off.