JPH0126141B2 - - Google Patents
Info
- Publication number
- JPH0126141B2 JPH0126141B2 JP55002085A JP208580A JPH0126141B2 JP H0126141 B2 JPH0126141 B2 JP H0126141B2 JP 55002085 A JP55002085 A JP 55002085A JP 208580 A JP208580 A JP 208580A JP H0126141 B2 JPH0126141 B2 JP H0126141B2
- Authority
- JP
- Japan
- Prior art keywords
- sliding piece
- casing
- pressure
- spring
- contact holder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims 2
- 239000007788 liquid Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 12
- 239000003507 refrigerant Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 244000145845 chattering Species 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
Description
【発明の詳細な説明】
本発明は流体圧力を検知して開閉切換作動をす
る圧力スイツチに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure switch that detects fluid pressure and performs an opening/closing operation.
自動車の空調システムが進歩し、夏期以外にお
いても空調装置のコンプレツサが駆動される機会
が増えてきており、そのため冷媒不足のまゝコン
プレツサの使用を続けてコンプレツサを損傷させ
る危険性が増大している。 As automobile air-conditioning systems have advanced, there are more opportunities for air-conditioner compressors to be operated outside of the summer season, and as a result, there is an increasing risk of damage to the compressor due to continued use of the compressor without refrigerant. .
このためカークーラーコンプレツサにおいては
冷媒が不足してコンプレツサの吸入側の圧力が低
下した場合にはコンプレツサの作動を停止するよ
うにする必要がある。 For this reason, in a car cooler compressor, if there is a shortage of refrigerant and the pressure on the suction side of the compressor decreases, it is necessary to stop the operation of the compressor.
コンデンサ、レシーバタンク、エクスパンジヨ
ンバルブ、エバポレータ、コンプレツサにより構
成されたカークーラー冷媒閉回路においては、あ
る一定の圧力、例えば2.5Kg／cm2以上の吸入側圧
力になるとコンプレツサの駆動を開始し、ある一
定圧力、例えば0.4Kg／cm2以下に吸入側圧力がな
つた場合にコンプレツサの駆動を停止するのが、
コンプレツサの保護及び有効利用の上で好まし
い。すなわち、吸入側圧力が、例えば2.5Kg／cm2
になつたことを検知して接点を閉じてコンプレツ
サのクラツチをON状態にし、吸入側圧力が、例
えば0.4Kg／cm2以下になつたことを検知して接点
を開いてコンプレツサのクラツチをOFF状態に
切換えるようなヒステリシススイツチを必要とす
る。 In a car cooler refrigerant closed circuit consisting of a condenser, receiver tank, expansion valve, evaporator, and compressor, when the suction side pressure reaches a certain level, for example, 2.5 kg/cm 2 or more, the compressor starts driving. The compressor stops driving when the suction side pressure drops below a certain pressure, for example 0.4Kg/ cm2 .
This is preferable in terms of protection and effective use of the compressor. That is, the suction side pressure is, for example, 2.5Kg/cm 2
When it detects that the pressure on the suction side has become below 0.4Kg/cm2, it closes the contact and turns the compressor clutch ON, and when it detects that the suction side pressure has dropped to, for example, 0.4Kg/cm 2 or less, it opens the contact and turns the compressor clutch OFF. A hysteresis switch is required.
このようなヒステリシスを必要とするにも拘ら
ず、従来の圧力スイツチは、実開昭53−90876号
公報に開示される如く、ダイアフラムの中央に固
定されたプランジヤの昇降に応じてのみ可動接点
ホルダーの反転・正転のくり返しを行うため、前
述したヒステリシスが得られない。 Despite the need for such hysteresis, conventional pressure switches, as disclosed in Japanese Utility Model Application Publication No. 53-90876, have a contact holder that moves only in response to the elevation and descent of a plunger fixed at the center of the diaphragm. The above-mentioned hysteresis cannot be obtained because the reversal and forward rotation are repeated.
本発明は、前述した要求に応じて開発されたも
ので、精度高く開閉切換作動をする圧力スイツチ
を提供することを目的としている。 The present invention was developed in response to the above-mentioned requirements, and an object of the present invention is to provide a pressure switch that performs opening/closing operation with high accuracy.
本発明の実施例を添付図面を参照して説明す
る。 Embodiments of the present invention will be described with reference to the accompanying drawings.
第１図に示すようなコンデンサ１とレシーバタ
ンク２とエクスパンシヨンバルブ３とエバポレー
タ４とコンプレツサ５とを順次接続したカークー
ラー用冷媒閉回路において、例えばエバポレータ
４とコンプレツサ５の間の導管に圧力スイツチ６
を設け、導管内の冷媒の圧力を検知してスイツチ
を開閉してコンプレツサ５の電磁クラツチを開閉
する。この圧力スイツチ６は、冷媒閉回路の圧力
変動に応じて正確な動作が要求される。第２図を
参照する。圧力スイツチ６のケーシング７は、流
体流入路８と、該流入路８に連通する室９を有す
る。 In a closed refrigerant circuit for a car cooler in which a condenser 1, a receiver tank 2, an expansion valve 3, an evaporator 4, and a compressor 5 are sequentially connected as shown in FIG. switch 6
A switch is provided to detect the pressure of the refrigerant in the conduit and open/close a switch to open/close the electromagnetic clutch of the compressor 5. This pressure switch 6 is required to operate accurately in response to pressure fluctuations in the refrigerant closed circuit. See Figure 2. The casing 7 of the pressure switch 6 has a fluid inlet 8 and a chamber 9 communicating with the inlet 8.
室９には中間ケーシング１０が嵌込まれ中間ケ
ーシング１０はかしめ部１１その他螺着等の適宜
の手段によりケーシング７に固定される。固定に
際してはパツキン或いは肉厚部により流体洩れを
防止した状態で中間ケーシング１０の端部とケー
シング７との間にダイアフラム１２の周縁部が固
定される。すなわちケーシング７の室９はダイア
フラム１２により流入路８に連通する第１の室
9aと流入路８から遮断された第２の室９６とに
分離される。 An intermediate casing 10 is fitted into the chamber 9, and the intermediate casing 10 is fixed to the casing 7 by a caulking portion 11 or other appropriate means such as screwing. At the time of fixing, the peripheral edge of the diaphragm 12 is fixed between the end of the intermediate casing 10 and the casing 7 while preventing fluid leakage using a packing or a thick wall portion. That is, the chamber 9 of the casing 7 is a first chamber that communicates with the inlet passage 8 through the diaphragm 12.
9a and a second chamber 96 blocked from the inflow path 8.
第２の室９ｂにはダイアフラム１２をケーシン
グ７の流入路８に対する弁座１３に押圧する流入
路閉鎖位置と、中間ケーシング１０に形成された
段部１４に当接する開放位置との間で摺動可能に
装着された摺動片１５が設けられている。この段
部１４が摺動片受け段部となる。摺動片１５には
作動軸１６が螺着等により固定されている。摺動
片１５と中間ケーシング１０との間に第１のばね
１７が装着され、摺動片１５は第１のばね１７に
よりダイアフラム１２を弁座１３に押圧する力を
付与されている。 The second chamber 9b has an inflow passage closed position in which the diaphragm 12 is pressed against the valve seat 13 relative to the inflow passage 8 of the casing 7, and an open position in which the diaphragm 12 abuts against a stepped portion 14 formed in the intermediate casing 10. A slidably mounted sliding piece 15 is provided. This stepped portion 14 becomes a sliding piece receiving step. An operating shaft 16 is fixed to the sliding piece 15 by screwing or the like. A first spring 17 is installed between the sliding piece 15 and the intermediate casing 10, and the sliding piece 15 is given a force by the first spring 17 to press the diaphragm 12 against the valve seat 13.
作動軸１６には摺動片１５に対向し、中間ケー
シング１２の内側に形成されている第２室９ｂの
範囲内において摺動可能にスリーブ１８が装着さ
れている。摺動片１５とスリーブ１８との間には
第２のばね１９が装着され、スリーブ１８は第１
のばね１７より強い第２のばね１９により作動軸
１６に形成された肩２０に対し押圧されている。 A sleeve 18 is mounted on the operating shaft 16 so as to be slidable within the second chamber 9b formed inside the intermediate casing 12, facing the sliding piece 15. A second spring 19 is installed between the sliding piece 15 and the sleeve 18, and the sleeve 18
It is pressed against a shoulder 20 formed on the actuating shaft 16 by a second spring 19 which is stronger than the spring 17 .
作動軸１６は中間ケーシング１２に形成された
軸受穴２１に嵌装され摺動案内されている。 The operating shaft 16 is fitted into a bearing hole 21 formed in the intermediate casing 12 and is slidably guided.
ケーシング７又は中間ケーシング１０に端子ケ
ース２２が嵌め込み固定されている。端子ケース
２２には２個の端子２３が固定されている。 A terminal case 22 is fitted and fixed to the casing 7 or the intermediate casing 10. Two terminals 23 are fixed to the terminal case 22.
端子２３からＬ型の第１のプレート２４が延在
し、且つこのプレート２４は、中間ケーシング１
０の上壁面に固定されたＬ型の第２のプレート２
５と電気的に導通関係となるように接続される。
第２のプレート２５には接点２６が設けられてい
る。 An L-shaped first plate 24 extends from the terminal 23 and is connected to the intermediate casing 1.
L-shaped second plate 2 fixed to the upper wall surface of 0
5 so as to be electrically conductive.
The second plate 25 is provided with contacts 26 .
一方、作動軸１６の上端にｕ字状の支持体２７
が固定される。該支持体２７の対向壁に長穴２８
が穿けられている。接点ホルダー２９のウエブに
はバカ穴３０が穿けられており、このバカ穴３０
に支持体２７を通すことで、両者を遊合関係とさ
せる。接点ホルダー２９のウエブには、又、対の
接点３１が、プレート２５の接点２６と接触可能
に配置されている。接点ホルダー２９の対向壁３
２には長穴３３が穿けられている。接点ホルダー
２９は、このホルダーの長穴３３および支持体２
７の長穴２８に両側の突片３４が挿入される連結
片３５によつて、支持体２７に保持される。 On the other hand, a U-shaped support 27 is provided at the upper end of the operating shaft 16.
is fixed. A long hole 28 is formed in the opposite wall of the support body 27.
is worn. A hole 30 is bored in the web of the contact holder 29.
By passing the support body 27 through, the two are brought into an interlocking relationship. A pair of contacts 31 is also arranged on the web of the contact holder 29 so as to be able to contact the contacts 26 of the plate 25. Opposing wall 3 of contact holder 29
2 has an elongated hole 33 bored therein. The contact holder 29 is connected to the long hole 33 of this holder and the support body 2.
It is held on the support body 27 by a connecting piece 35 in which the projecting pieces 34 on both sides are inserted into the elongated holes 28 of 7.
ｕ字状の支持体２７は、その対向壁が外開きし
ようとするようにばね特性を持たせる。この支持
体２７のばね特性は、第２図に示す状態では、接
点ホルダー２９を連結片３５を介して上向きに持
上げる作用をなし、両接点２６，３１が非接触状
態となり、いわゆるOFF状態を作る。支持体２
７にばね特性を持たせることなく、連結片３５に
ばね特性を与え、前述の作用を得るようにしても
よい。 The U-shaped support 27 has spring characteristics so that its opposing walls tend to open outward. The spring characteristics of the support body 27, in the state shown in FIG. 2, act to lift the contact holder 29 upward via the connecting piece 35, and both contacts 26 and 31 are brought into a non-contact state, resulting in a so-called OFF state. make. Support 2
It is also possible to provide the connecting piece 35 with a spring characteristic to obtain the above-mentioned effect without imparting the spring characteristic to the connecting piece 7.
第４および５図の別の実施例を示す。本例で
は、作動軸１６の上部に環状の溝３６を形成し、
接点ホルダー２９のバカ穴３０に作動軸１６を通
し、ｕ字状部３７を有する連結片３５′を用いて、
接点ホルダー２９を作動軸１６に保持させる。連
結片３５′の一側は、接点ホルダー２９の長穴３
３に挿入される突片３４を有し、又、連結片３
５′の他側は、作動軸１６の溝３６に係合する半
円状の溝３８を有する。連結片３５′のｕ字状部
３７は、ばね特性を有し、第４図に示す状態で
は、接点ホルダー２９を上方に持上げる作用を成
す。 Another embodiment of FIGS. 4 and 5 is shown. In this example, an annular groove 36 is formed in the upper part of the operating shaft 16,
Pass the operating shaft 16 through the hole 30 of the contact holder 29, and use the connecting piece 35' having the U-shaped part 37.
The contact holder 29 is held on the operating shaft 16. One side of the connecting piece 35' is connected to the elongated hole 3 of the contact holder 29.
It has a protruding piece 34 inserted into the connecting piece 3.
The other side of 5' has a semicircular groove 38 that engages the groove 36 of the actuating shaft 16. The U-shaped portion 37 of the connecting piece 35' has spring characteristics and functions to lift the contact holder 29 upward in the state shown in FIG.
本装置の作動を説明する。 The operation of this device will be explained.
第２図に示す接点２６，３１の開状態において
流入路８に作用する流体の圧力が上昇し、あらか
じめ定めた圧力、例えば第６図に点ａで示す圧力
に達すると、２つのばね定数の小さい第１のばね
１７が流体圧に対抗できずに撓みはじめる。摺動
片１５の移動により弁座１３が開放され、流体は
第１の室９ａに流入してゴム製ダイヤフラムに圧
力を作用させる。 When the pressure of the fluid acting on the inflow path 8 increases when the contacts 26 and 31 shown in FIG. 2 are open, and reaches a predetermined pressure, for example, the pressure shown at point a in FIG. The small first spring 17 cannot resist the fluid pressure and begins to flex. The movement of the sliding piece 15 opens the valve seat 13 and the fluid flows into the first chamber 9a and exerts pressure on the rubber diaphragm.
摺動片１５の移動により作動軸１６も移動す
る。作動軸１６と共に第２のばね１９により肩２
０に押圧された状態でスリーブ１８も移動する。 As the sliding piece 15 moves, the actuating shaft 16 also moves. Shoulder 2 by second spring 19 together with actuating shaft 16
The sleeve 18 also moves while being pressed to zero.
摺動片１５が圧力の上昇に応じて移動しストロ
ークl1だけ移動するとスリーブ１８が中間ケーシ
ング１０の当接面３９に当接する。このときは第
６図の点ｂに相当する。 When the sliding piece 15 moves in response to the increase in pressure and moves by a stroke l 1 , the sleeve 18 comes into contact with the abutment surface 39 of the intermediate casing 10 . This case corresponds to point b in FIG.
摺動片１５の移動量がl1に達した後、すなわち
スリーブ１８が当接面３９に接した後しばらくは
第２のばね１９の付勢力により摺動片は圧力が増
大しても停止した状態で保持されている。 After the amount of movement of the sliding piece 15 reached l1 , that is, after the sleeve 18 came into contact with the contact surface 39, the sliding piece stopped due to the biasing force of the second spring 19 even if the pressure increased. maintained in the state.
流体の圧力があらかじめ定められた第２の圧力
値すなわち第６図のｃ点に対応する値に達すると
第２のばね１９の圧縮が開始し、摺動片１５は再
び圧力の増大にしたがつて移動する。この移動は
l2−l1許容されるが、摺動片１５が段部１４に接
する状態に近付くと、Ａ点はＢ点と同レベルに成
る。この同レベルの状態では、ｕ字状の支持体２
７或いはｕ字部３７を有する連結片３５′は圧縮
されその付勢力を貯える。摺動片１５が段部１４
に接する直前には、Ａ点のレベルがＢ点のレベル
より高くなり、支持体２７或いは連結片３５′の
付勢力が瞬時に接点ホルダー２９を下向きに移動
させ両接点２６，３１を閉じた状態とさせる。こ
の両接点２６，３１が閉じる状態は、流体圧が例
えば前記の2.5Kg／cm2になる時、得られるように
設定する。 When the pressure of the fluid reaches a predetermined second pressure value, that is, the value corresponding to point c in FIG. Move along. This movement is
l 2 −l 1 is allowed, but as the sliding piece 15 approaches the step 14, point A becomes the same level as point B. In this same level state, the U-shaped support 2
7 or the connecting piece 35' having the U-shaped portion 37 is compressed and stores its biasing force. The sliding piece 15 is the step part 14
Immediately before contacting the point A, the level at point A becomes higher than the level at point B, and the urging force of the support 27 or the connecting piece 35' instantly moves the contact holder 29 downward, closing both contacts 26 and 31. Let it be. The state in which both contacts 26 and 31 are closed is set to be achieved when the fluid pressure reaches, for example, the aforementioned 2.5 kg/cm 2 .
接点についてのみ考慮すると第７図に示すよう
に所定圧例えば2.5Kg／cm2になるまでは接点開状
態すなわちOFF状態に保持され、所定圧で接点
閉状態すなわちON状態に瞬時に移行する。 Considering only the contacts, as shown in FIG. 7, the contacts are held in the open state, that is, the OFF state, until a predetermined pressure, for example, 2.5 kg/cm 2 , is reached, and at the predetermined pressure, the contacts instantly shift to the closed state, that is, the ON state.
接点２６，３１が閉になつて若干後に摺動片１
５は内部ハウジング１０の段部１４に当接し第８
図に示す状態になる。すなわち第６図の点ｄに対
応する。その後は流体の圧力が増大しても第８図
の状態でON状態に保持される。 Slightly after the contacts 26 and 31 are closed, the sliding piece 1
5 is in contact with the stepped portion 14 of the inner housing 10 and the eighth
The state shown in the figure will be reached. That is, it corresponds to point d in FIG. Thereafter, even if the fluid pressure increases, the ON state is maintained in the state shown in FIG. 8.
第８図に示す状態において流体圧力が降下し所
定の圧力すなわち第６図の点d′に達すると第２の
ばね１９の弾撥力により摺動片１５が弁座１３に
向けて移動する。このとき作動軸１６も移動する
がスリーブ１８は第２のばねの力により中間ハウ
ジング１０の当接面３９に押圧保持され、ON状
態は維持される。 In the state shown in FIG. 8, when the fluid pressure decreases and reaches a predetermined pressure, that is, point d' in FIG. 6, the sliding piece 15 moves toward the valve seat 13 due to the elastic force of the second spring 19. At this time, the actuating shaft 16 also moves, but the sleeve 18 is held pressed against the contact surface 39 of the intermediate housing 10 by the force of the second spring, and the ON state is maintained.
摺動片１５が所定ストローク移動して第２のば
ね１９が伸張した状態すなわち第６図の点c′に達
するとそのときの流体圧は第１のばねの力より大
であるので摺動片１５は停止する。 When the sliding piece 15 moves a predetermined stroke and reaches the state where the second spring 19 is stretched, that is, point c' in FIG. 6, the fluid pressure at that time is greater than the force of the first spring, so the sliding piece 15 stops.
流体圧が更に降下して所定の圧力、第６図の点
b′にいたると第１のばね１７の力により摺動片１
５が再度移動を開始する。このときスリーブ１８
も共に移動する。Ｂ点はＡ点と同レベルになると
共に、摺動片１５の下降即ち作動軸１６の下降に
よりＡ点がＢ点より低い位置となり、接点ホルダ
ー２９は第２図に示す位置になる。第６図で云う
とa′に向い瞬時にOFF状態となり、ダイアフラム
１２が弁座１３に着座すると第６図のa′の状態が
保持されることになる。 The fluid pressure further decreases to a predetermined pressure, the point in Figure 6.
When reaching b', the sliding piece 1 is moved by the force of the first spring 17.
5 starts moving again. At this time, the sleeve 18
will also move together. Point B becomes the same level as point A, and due to the lowering of the sliding piece 15, that is, the lowering of the operating shaft 16, point A becomes lower than point B, and the contact holder 29 is placed in the position shown in FIG. In FIG. 6, it turns to a' and instantly becomes OFF, and when the diaphragm 12 seats on the valve seat 13, the state a' in FIG. 6 is maintained.
第２および４図に関連して、常開タイプの圧力
スイツチについて説明したが、第９図に示すよう
に常閉タイプの圧力スイツチにも、接点ホルダー
２９を取付け前述した例と同効果を得ることがで
きる。図示実施例ではダイアフラムを用いて作動
軸を昇降させたが、他の手段を用いて流入路の圧
力変化に応答して作動軸を昇降させるようにして
もよい。 Although the normally open type pressure switch has been explained in connection with Figs. 2 and 4, the contact holder 29 can also be attached to a normally closed type pressure switch as shown in Fig. 9 to obtain the same effect as in the above example. be able to. Although the illustrated embodiment uses a diaphragm to raise and lower the actuating shaft, other means may be used to raise and lower the actuating shaft in response to pressure changes in the inlet passage.
以上から明らかなように、本発明では予め定め
た低い圧力と高い圧力の２つの圧力値において圧
力スイツチのON・OFFを別に作動させることが
できるが、ばね特性を有する部材の付勢力によつ
て、接点ホルダーの位置を所定圧力値に応じて変
えることができ正確なスイツチング動作を得るこ
とができる。接点ホルダーがばね特性を有する部
材を介して作動軸に保持されるのでスイツチのい
わゆるチヤタリング現象は生じない。 As is clear from the above, in the present invention, the pressure switch can be turned on and off separately at two predetermined pressure values, low pressure and high pressure. , the position of the contact holder can be changed according to a predetermined pressure value, and accurate switching operation can be obtained. Since the contact holder is held on the operating shaft via a member having spring characteristics, the so-called chattering phenomenon of the switch does not occur.
第１図はこの発明の一例の圧力スイツチを用い
ている自動車用空調システムの冷凍サイクルの配
管図、第２図はこの発明の一例の圧力スイツチの
断面図、第３図は可動接点ホルダーまわりの部品
を示す分解斜視図、第４図は別の実施例の部分断
面図、第５図は別の例の接点ホルダーまわりの部
品を示す分解斜視図、第６図は圧力変化と作動軸
のストロークを示すグラフ、第７図は圧力変化と
接点状態を示すグラフ、第８図は第２図に示す圧
力スイツチの閉状態を示す断面図、第９図は常閉
タイプの圧力スイツチの例を示す部分断面図であ
る。
図中：６……圧力スイツチ、８……流入路、１
６……作動軸、１７，１９……スプリング、２
６，３１……接点、２９……可動接点ホルダー、
３５，３５′……連結片。
Fig. 1 is a piping diagram of a refrigeration cycle of an automobile air conditioning system using a pressure switch according to an example of the present invention, Fig. 2 is a sectional view of a pressure switch according to an example of the present invention, and Fig. 3 is a diagram of the piping around the movable contact holder. 4 is a partial sectional view of another embodiment. 5 is an exploded perspective view of parts around the contact holder of another example. 6 is pressure change and stroke of the operating shaft. Fig. 7 is a graph showing pressure changes and contact states, Fig. 8 is a sectional view showing the closed state of the pressure switch shown in Fig. 2, and Fig. 9 shows an example of a normally closed type pressure switch. FIG. In the diagram: 6...Pressure switch, 8...Inflow path, 1
6... Operating shaft, 17, 19... Spring, 2
6, 31...Contact, 29...Movable contact holder,
35, 35'...Connecting piece.
Claims (1)
れた摺動片と、 外周端を前記ケーシングに且つ中央部を前記摺
動片に固定させたダイアフラムと、該ダイアフラ
ムが流体圧を導入する第１の室と前記摺動片を配
する第２の室とに前記ケーシングの内部空間内を
区画し、さらに、 前記摺動片に固定され且つ前記第２の空間内に
延出する作動軸と、 前記作動軸に対して摺動自在に配されたスリー
ブと、 前記摺動片と前記ケーシングのばね受け段部と
の間に配された第１のばねと、 前記摺動片と前記スリーブとの間に配された第
２のばねと、 前記作動軸にばね特性を有する部材を介して保
持された可動接点ホルダーと、 前記ケーシング側に保持された固定接点と、 前記スリーブと対向するよう前記ケーシングに
設けられた当接面と、および 前記摺動片と対向するよう前記ケーシングに設
けられた摺動片受け段部とを有し、 前記第１の室に液体圧が作用しない時、前記ス
リーブと前記当接面との間の寸法l1が、前記摺動
片と前記摺動片受け段部との間の寸法（l2）より
小であり、前記摺動片と前記摺動片受け段部との
当接時には前記可動接点ホルダーが反転している
ことを特徴とする圧力スイツチ。 ２ 前記作動軸の上部に環状溝を有し、且つ前記
可動接点ホルダーが対の立上り壁を有し、前記ば
ね特性を有する部材が前記溝と前記立上り壁とに
係合するようになつていることを特徴とする第１
項記載の圧力スイツチ。[Scope of Claims] 1. A sliding piece reciprocably disposed within an internal space of a casing, a diaphragm having an outer peripheral end fixed to the casing and a central part fixed to the sliding piece, and the diaphragm being fixed to the sliding piece. The interior space of the casing is divided into a first chamber into which pressure is introduced and a second chamber in which the sliding piece is disposed, and a chamber which is fixed to the sliding piece and extends into the second space. a sleeve disposed slidably relative to the operating shaft; a first spring disposed between the sliding piece and the spring receiving stepped portion of the casing; a second spring disposed between the piece and the sleeve; a movable contact holder held on the operating shaft via a member having spring characteristics; a fixed contact held on the casing side; and the sleeve. a contact surface provided on the casing so as to face the sliding piece, and a sliding piece receiving stepped portion provided on the casing so as to face the sliding piece, and the liquid pressure is applied to the first chamber. When not acting, the dimension l 1 between the sleeve and the abutment surface is smaller than the dimension (l 2 ) between the sliding piece and the sliding piece receiving step, and the sliding piece A pressure switch characterized in that the movable contact holder is inverted when the movable contact holder comes into contact with the sliding piece receiving step. 2. The operating shaft has an annular groove in the upper part, and the movable contact holder has a pair of rising walls, and the member having spring characteristics is adapted to engage with the groove and the rising walls. The first feature is that
Pressure switch as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP208580A JPS5699932A (en) | 1980-01-14 | 1980-01-14 | Pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP208580A JPS5699932A (en) | 1980-01-14 | 1980-01-14 | Pressure switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5699932A JPS5699932A (en) | 1981-08-11 |
| JPH0126141B2 true JPH0126141B2 (en) | 1989-05-22 |
Family
ID=11519503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP208580A Granted JPS5699932A (en) | 1980-01-14 | 1980-01-14 | Pressure switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5699932A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2591335B2 (en) * | 1990-11-16 | 1997-03-19 | 松下電器産業株式会社 | Coaxial connector mounting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5390876U (en) * | 1976-12-25 | 1978-07-25 |
-
1980
- 1980-01-14 JP JP208580A patent/JPS5699932A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5699932A (en) | 1981-08-11 |
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