JPS62163838U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本案圧力スイツチの一実施例の冷媒の
異常低圧時における各部材の位置を示す概略の縦
断面図、第２図は冷媒の所定圧時における同様の
縦断面図、第３図は冷媒の異常高圧時における同
様の縦断面図で第４図は従来の圧力スイツチの概
略の縦断面図である。 １１……ケース、１２……作動室、１３……カ
バ、１４……通路、１５……ダイヤフラム、１８
……ガイド、１９……鍔部、２０……ガイド壁、
２１……ガイド孔、２２……環状のビード、２３
……ストツパ、２４……フランジ、２５……第１
の段部、２６……第１の反転板、２７……第２の
反転板、２８……第２の段部、２９……作動棒、
３０，３１……ターミナル、３２……固定接点、
３３……スイツチレバ、３４……可動接点。 Fig. 1 is a schematic vertical sectional view showing the position of each member in an embodiment of the pressure switch of the present invention when the refrigerant pressure is abnormally low, Fig. 2 is a similar longitudinal sectional view when the refrigerant is at a predetermined pressure, and Fig. 3 is a schematic longitudinal sectional view showing the position of each member when the refrigerant pressure is abnormally low. FIG. 4 is a similar vertical cross-sectional view when the refrigerant is at an abnormally high pressure, and is a schematic vertical cross-sectional view of a conventional pressure switch. 11... Case, 12... Working chamber, 13... Cover, 14... Passage, 15... Diaphragm, 18
... Guide, 19 ... Tsubabe, 20 ... Guide wall,
21... Guide hole, 22... Annular bead, 23
...stopper, 24...flange, 25...first
Step portion, 26...first reversal plate, 27...second reversal plate, 28...second step portion, 29...operating rod,
30, 31...terminal, 32...fixed contact,
33...Switch lever, 34...Movable contact.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 内部に作動室を有するケース、このケースを密
封状態で覆い圧力流体の通路を有するカバより構
成されたスイツチ本体と、前記ケースとカバとの
間にその周縁部を挟持されたダイヤフラムと、前
記ケースの第１の段部とダイヤフラムとの間を移
動可能で周縁にダイヤフラム側に向く鍔部を有し
、中心部にガイド壁によりガイド孔を形成すると
共に鍔部と中心との間に環状のビードを有する逆
皿状のガイドと、前記ダイヤフラムとガイドとの
間に設けられ、ガイドに沿つて移動可能で周縁部
にフランジを有するストツパと、このストツパと
ガイドとの間に設けられその周縁部がストツパの
フランジに係合し且つ一面が前記ガイドの環状の
ビードに当接すると共に、無加圧時には前記スト
ツパと対向する側に偏位している第１の反転板と
、外周縁がケースの第２の段部と係合し、又内周
縁が前記ガイド壁に係合し、無加圧時ガイド壁側
に偏位している第２の反転板と、前記ガイド孔内
を摺動する作動棒と、前記ケースに互いに対向し
て支持され夫々各端部がケースの作動室とケース
外に露出する一対のターミナルと、一方のターミ
ナルの作動室側の端部に固定された固定端子と、
他方のターミナルの作動室側の端部に一端を固定
され他端に可動接点を有すると共にその弾力によ
り常時可動接点が固定接点より離間する側に偏位
するスイツチレバとよりなる圧力スイツチ。 A switch body consisting of a case having an operating chamber inside, a cover that seals the case and has a pressure fluid passage, a diaphragm whose peripheral edge is held between the case and the cover, and the case. is movable between the first step and the diaphragm and has a flange facing toward the diaphragm on the periphery, a guide hole is formed in the center by a guide wall, and an annular bead is formed between the flange and the center. a stopper provided between the diaphragm and the guide, movable along the guide and having a flange on its peripheral edge; and a stopper provided between the stopper and the guide and having a peripheral edge thereof; a first reversing plate that engages with the flange of the stopper, one surface of which abuts the annular bead of the guide, and which is deviated toward the side facing the stopper when no pressure is applied; a second reversing plate that is engaged with the second step portion, whose inner peripheral edge is engaged with the guide wall, and is deviated toward the guide wall when no pressure is applied, and a second reversing plate that slides within the guide hole; a rod, a pair of terminals supported by the case so as to face each other and each end of which is exposed to the working chamber of the case and outside the case, and a fixed terminal fixed to the end of one terminal on the working chamber side;
A pressure switch comprising a switch lever having one end fixed to the end of the other terminal on the working chamber side and having a movable contact at the other end, and whose elasticity always causes the movable contact to deviate away from the fixed contact.