Overpressure release valve and overpressure release unit

摘要

It has a simple structure and can be miniaturized, and can be easily attached to a member such as a container made of a thin flexible material. It has a stronger adhesive force than the operating pressure, and the operating pressure varies. Provide a small overpressure relief valve. The excessive pressure release valve 14 is configured by a rubber elastic plate 16 that is attached to the container 12 to which pressure is applied to the inner wall surface 12b and releases the excessive pressure applied to the inner wall surface 12b of the container 12 to the outside. The rubber elastic plate 16 is formed with a fragile portion 26 that ruptures so as to release excessive pressure applied to the back surface side to the outside on the front surface side. 12b is formed of a rubber material containing a thermoplastic resin that can be thermocompression bonded.