| 摘要 |
PURPOSE: A pressure sensor is provided to generate a uniform magnetic force line from the N-pole to the S-pole regardless of a change in an installation position of a permanent magnet as a shape structure of the permanent magnet is formed into a cylindrical form. CONSTITUTION: A pressure sensor(1a) comprises a housing unit(10), a diaphragm(20), an elevating member(25), a permanent magnet(30a), and a detecting member(40). The housing unit has a flexible space for the inflow and the outflow of fluid in inside and is composed of a base(11) and a cap(12). The diaphragm is mounted inside the housing unit and moved upward and downward by an elastic action of an elastic member(35) and a pressing action of the fluid flowing into the space. The elevating member is seated in an upper center of the diaphragm while the elastic member is attached to a magnet joining rod(26) and interlocked with the lifting operation of the diaphragm caused by the pressing action and elastic action, thereby being moved upward and downward in an identical direction. The permanent magnet is fixed to the magnet joining rod and interlocked to the elevating member, thereby being moved upward and downward in the identical direction when the diaphragm is moved upward and downward. The detecting member is arranged in the one upper part of the base of the housing unit adjacent to an operation section where the permanent magnet moves. |
