| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure switch capable of preventing an operation pressure set value from shifting to a low value when temperature rises. SOLUTION: This pressure switch 1 opens and closes a contact 108 by an operation bar 106 operating in accordance with operation of a diaphragm 203 constituted by laminating predetermined number of metallic thin plates. The diaphragm 203 is welded 109 together with a receive member 102 and a stopper member 204 and is integrated with them. The stopper member 204 is provided with an operation bar guide member 105 provided on it. The operation bar guide member 105 is constituted as a guide member of the operation bar 106, and a case 107 forming a space in which the switch is provided is put on it. The case 107 and the receive member 102 are fixed by caulking by a main body 101. The stopper member 204 is constituted by SUS 430, and its coefficient of thermal expansion is set to be smaller than coefficient of thermal expansion of the diaphragm 203 constituted by SUS 301. COPYRIGHT: (C)2003,JPO
|
