Pressure sensor for a vehicle

A pressure sensor comprising:

• a housing which has an opening portion for communication an interior of the housing with an exterior thereof;
• a pressure detecting unit which has a detection surface for detecting a pressure and is arranged in the housing;
• and
• a seal member made of a buffer material to buffer stress caused by a relative displacement between the housing and the pressure detecting unit, wherein
• one of a perimeter of the detection surface of the pressure detecting unit and that of the opening portion of the housing has a protrusion portion which protrudes toward other of the perimeters;
• the other of the perimeters has a groove, into which a tip of the protrusion portion is inserted;
• and
• the seal member is arranged between the groove and the tip of the protrusion portion to seal therebetween and is constructed by a hardening of a raw material solution in such a manner that the tip of the protrusion portion is plunged in the raw material solution, which is reserved in the groove, wherein
• one of the pressure detecting unit and the housing where the groove is arranged has a reservoir for accommodating the raw material solution of the seal member;
• and
• when a liquid level of the raw material solution in the groove is beyond a predetermined position, the raw material solution overflows from the groove into the reservoir.

A pressure sensor comprising:

• a housing which has an opening portion for communicating an interior of the housing with an exterior thereof;
• a pressure detecting unit which has a detection surface for detecting a pressure and is arranged in the housing;
• and
• a seal member, wherein
• one of a perimeter of the detection surface of the pressure detecting unit and that of the opening portion of the housing has a protrusion portion which protrudes toward other of the perimeters;
• the other of the perimeters has a groove, into which a tip of the protrusion portion is inserted, wherein the tip of the protrusion portion and a lower portion of the groove define a passageway;
• and
• the seal member is arranged between the groove and the tip of the protrusion portion to seal therebetween.