초록 ▼

An acceleration sensor includes a tubular casing having one open end closed by a lid of an elastic material. An magnetic member is received within a sealed space defined by the casing and the lid, and a damper liquid fills in the sealed space. The lid is fixedly connected at its outer peripheral por

An acceleration sensor includes a tubular casing having one open end closed by a lid of an elastic material. An magnetic member is received within a sealed space defined by the casing and the lid, and a damper liquid fills in the sealed space. The lid is fixedly connected at its outer peripheral portion to one end portion of the casing including the open end thereof. The lid is deformable away from the other end of the casing so as to absorb a thermal expansion of the damper liquid. The lid has an annular deformable diaphragm portion extending between a central tubular portion of the lid and the outer peripheral portion of the lid. For attaching the lid to the casing, the outer peripheral portion of the lid is pressed into the one end portion of the casing so as to bring the diaphragm portion into contact with the damper liquid, so that part of the damper liquid flows into the tubular portion. Subsequently, an axial bore of the tubular portion is closed by a closure member.

대표청구항 ▼

An acceleration sensor comprising: (a) a tubular casing having one open end and another closed end; (b) a lid which sealingly closes said open end of said casing so that said casing defines together with said lid an internal sealed space, said lid being made of an elastic material and being fixedly

An acceleration sensor comprising: (a) a tubular casing having one open end and another closed end; (b) a lid which sealingly closes said open end of said casing so that said casing defines together with said lid an internal sealed space, said lid being made of an elastic material and being fixedly connected at its outer peripheral portion to one end portion of said casing including said open end of said casing, said lid being elastically deformable away from said another end of said casing, and said lid having a tubular portion at said outer peripheral portion of said lid, said tubular portion of said lid being received in said one end portion of said casing, wherein an annular compressing member is received in said tubular portion so that said tubular portion is compressed between said one end portion of said casing and said compressing member; (c) a damper liquid filled in said sealed space; (d) a magnetic member movably received within said sealed space; (e) magnetic force-generating means mounted externally of said casing, a magnetic force generated by said magnetic force-generating means holding said magnetic member in a reference position within said casing, and said magnetic member being displaceable from said reference position against the magnetic force of said magnetic force-generating means when said acceleration sensor is subjected to acceleration; and (f) detection means mounted externally of said casing for detecting displacement of said magnetic member from said reference position.