JPH0438440Y2 - - Google Patents
Info
- Publication number
- JPH0438440Y2 JPH0438440Y2 JP1987069650U JP6965087U JPH0438440Y2 JP H0438440 Y2 JPH0438440 Y2 JP H0438440Y2 JP 1987069650 U JP1987069650 U JP 1987069650U JP 6965087 U JP6965087 U JP 6965087U JP H0438440 Y2 JPH0438440 Y2 JP H0438440Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- switch
- contact
- diaphragm
- disc spring
- 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 8
- 230000002441 reversible effect Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 244000145845 chattering Species 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、冷房装置等に用いられる２動作型等
の圧力スイツチの改良に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a two-action type pressure switch used in a cooling device or the like.
（従来の技術）
冷凍サイクルなどにおいて冷媒圧力が異常に低
下しまたは上昇したような場合圧縮機の電源回路
を遮断して装置を保護するための圧力スイツチが
使用されている。そして、この圧力スイツチは、
受圧室に設けられたダイヤフラムとばね手段とに
よつて圧力を検知し、内部に組込まれた接点を
ON，OFFするものである。このばね手段には従
来コイルスプリングが使用されていたが、高さ方
向が長くなることから圧力スイツチが必然的に大
きくなるという欠点を有していた。(Prior Art) A pressure switch is used in a refrigeration cycle or the like to protect the equipment by cutting off the power circuit of the compressor when the refrigerant pressure abnormally decreases or increases. And this pressure switch is
Pressure is detected by a diaphragm and spring means installed in the pressure receiving chamber, and the internal contacts are activated.
It turns on and off. Conventionally, a coil spring has been used as this spring means, but it has the disadvantage that the pressure switch is necessarily large because it becomes long in the height direction.
これに対し実開昭61−127543では第６図に示す
ように、コイルスプリングのかわりに皿ばねを使
用してコンパクト化を図つている。これによると
蓋体１の圧力導入口２から受圧室６に入つた高圧
の冷媒はダイヤフラム４を皿ばね９に抗して図の
上方にたわませる。ダイヤフラム４と接して設け
られたピストン２１はこのたわみに応じ上方に摺
動し、ガイド部材２２を移動させ、その中心にあ
るロツド２３を押し上げ接点１４の方に押圧す
る。冷媒の圧力が設定P1＋ΔP1に達すると、接点
１３と１４は第７図ａに示すように接触し、端子
１５，１６は導通状態となり、即ちスイツチON
となる。 On the other hand, in Utility Model Application No. 61-127543, as shown in FIG. 6, a disc spring was used instead of the coil spring to make it more compact. According to this, the high-pressure refrigerant entering the pressure receiving chamber 6 from the pressure introduction port 2 of the lid body 1 causes the diaphragm 4 to bend upward in the figure against the disc spring 9. A piston 21 provided in contact with the diaphragm 4 slides upward in response to this deflection, displacing the guide member 22 and pushing the rod 23 in its center upwardly toward the contact 14. When the refrigerant pressure reaches the setting P 1 +ΔP 1 , contacts 13 and 14 come into contact as shown in FIG.
becomes.
冷媒の圧力が更に上昇すると、ある圧力でガイ
ド部材２２はスイツチ本体３の段差部に接触し止
まる。冷媒の圧力が更に上昇すると圧力反転板８
の端部がピストン２１に押され圧力反転板は反転
する。このとき圧力反転板８の中心部の動き量は
ピストン２１の底部を基準にすると第７図ａのlh
である。しかしピストン２１は圧力反転板８を反
転させるために反転前後で第７図ａに示すluだけ
動く。このためロツド２３はlh−luだけ下方に下
がり接点１３は接点１４から離れてスイツチ
OFFとなる。 When the pressure of the refrigerant further increases, the guide member 22 comes into contact with the stepped portion of the switch body 3 at a certain pressure and stops. When the pressure of the refrigerant increases further, the pressure reversal plate 8
The end of the pressure reversing plate is pushed by the piston 21 and the pressure reversing plate is reversed. At this time, the amount of movement of the center of the pressure reversal plate 8 is l h in FIG. 7a, based on the bottom of the piston 21.
It is. However, the piston 21 moves by l u shown in FIG. 7a before and after reversal in order to reverse the pressure reversal plate 8. Therefore, the rod 23 moves downward by l h - l u , and the contact 13 moves away from the contact 14 and switches.
It becomes OFF.
（考案が解決しようとする問題点）
しかしながら上記の従来技術においては、皿ば
ね９の突出方向と圧力反転板８の突出方向とが反
対向きになつているため、前述のとおりロツド２
３の移動量はlh−luとなり、圧力反転板の反転量
を有効に使用できない。(Problem to be solved by the invention) However, in the above-mentioned prior art, since the protruding direction of the disc spring 9 and the protruding direction of the pressure reversing plate 8 are opposite to each other, the rod 2
The amount of movement of No. 3 is l h - l u , and the amount of reversal of the pressure reversal plate cannot be used effectively.
又、皿ばねは、その外周部をスイツチ本体３に
形成された平面状の受け部２４に当接させ、内周
部をガイド部材２２の中心部周辺に形成されたや
はり平面状の受け部に当接させて、面接触により
支持されている。したがつて、圧力の上昇、下降
によりその反り方向を反転するたびに、皿ばねと
上記受け部との接触面はこすれ合うことになる。
皿ばねは通常硬質の金属材料から形成されてお
り、また表面仕上げが施されているが、皿ばねと
受け部との接触が面接触であるために、樹脂製の
上記受け部が摩耗し易く、摩耗するとたわみ量も
影響を受け、設定圧力P1に狂いが生じ、誤動作
の原因になるという欠点を有している。 Further, the outer circumferential portion of the disc spring is brought into contact with a planar receiving portion 24 formed on the switch body 3, and the inner circumferential portion thereof is brought into contact with a planar receiving portion formed around the center of the guide member 22. They are brought into contact and supported by surface contact. Therefore, each time the direction of warpage is reversed due to an increase or decrease in pressure, the contact surfaces between the disc spring and the receiving portion rub against each other.
Disc springs are usually made of a hard metal material and have a surface finish, but since the contact between the disc spring and the receiving part is surface contact, the resin receiving part is easily worn out. However, when worn, the amount of deflection is also affected, causing deviation in the set pressure P1 , which has the disadvantage of causing malfunction.
さらに、皿ばねと受け部とが面接触している
と、上記の問題に加えて、接触摩擦により皿ばね
のヒステリシスが大きくなり、皿ばねが反転する
時の圧力と、元に戻る時の圧力との相違が大きく
なつて、必要なスイツチ特性が得られなくなると
いう欠点もあつた。 Furthermore, if the disc spring and the receiving part are in surface contact, in addition to the above problem, the hysteresis of the disc spring increases due to contact friction, and the pressure when the disc spring reverses and the pressure when it returns to its original state. Another drawback was that the difference between the two and the two became large, making it impossible to obtain the necessary switch characteristics.
本考案は上記の欠点を解消するもので、圧力反
転板の反転量を全て有効に利用でき、皿ばね受部
の摩耗が少なくて皿ばねのヒステリシスが小さい
圧力スイツチを提供することを目的としている。 The present invention solves the above-mentioned drawbacks, and aims to provide a pressure switch that can effectively utilize the entire amount of reversal of the pressure reversal plate, has less wear on the disc spring receiver, and has low hysteresis of the disc spring. .
（問題点を解決するための手段）
本考案は上記の目的を達成するために、圧力導
入口と電気回路を開閉する接点との間にダイヤフ
ラムを気密に固着した受圧室を有する蓋体と、前
記ダイヤフラムの変形に応じて一定量内で移動し
中心に貫通孔を有し前記接点を押圧するボス部を
備えた応動体と、該応動体と前記ダイヤフラムと
の中間に設けられた圧力反転板と、前記応動体の
貫通孔を貫通し圧力反転板の反転に追従して閉成
した接点を開成するスイツチ駆動体と、前記応動
体をダイヤフラムに向かつて付勢する反転型の皿
ばねとからなり、受圧室の圧力上昇に伴い皿ばね
が先に反転し、その後圧力反転板が反転する圧力
スイツチにおいて、
前記皿ばね及び圧力反転板の突出方向をダイヤ
フラムの突出方向と同一にするとともに、圧力反
転板をダイヤフラムに近接して配置し、前記皿ば
ねは端面加工を施され外周部は上記スイツチ本体
に設けられた突起部に圧接し、内周部は上記応動
体に設けられた突起部に圧接している構成を特徴
としている。(Means for Solving the Problems) In order to achieve the above object, the present invention includes a lid body having a pressure receiving chamber in which a diaphragm is airtightly fixed between a pressure inlet and a contact point for opening and closing an electric circuit; a responsive body that moves within a certain amount in response to deformation of the diaphragm, has a through hole in the center, and has a boss portion that presses the contact; and a pressure reversal plate provided between the responsive body and the diaphragm. a switch driver that penetrates the through hole of the responsive body and opens a closed contact following the reversal of the pressure reversal plate; and a reversible disc spring that biases the responsive body toward the diaphragm. In a pressure switch in which the disc spring reverses first and then the pressure reversal plate reverses as the pressure in the pressure receiving chamber increases, the protruding direction of the disc spring and the pressure reversing plate is made the same as the protruding direction of the diaphragm, and the pressure A reversing plate is arranged close to the diaphragm, and the end surface of the disc spring is processed so that the outer peripheral part is in pressure contact with the protrusion provided on the switch body, and the inner peripheral part is in pressure contact with the protrusion provided on the response body. It is characterized by a pressure-contact configuration.
（実施例）
次に本考案の実施例について図面によつて説明
する。第１図は本考案の１実施例である２動作型
圧力スイツチを示している。蓋体１には圧力導入
口２があり、スイツチ本体３との間にダイヤフラ
ム４が環状パツキング５により気密に取り付けら
れ、受圧室６を形成している。ダイヤフラム４の
変形は応動体７を上下に摺動させ同時にダイヤフ
ラムの内側に沿つて設けられ応動体７の内部に外
縁部を支持された圧力反転板８を移動、反転させ
る。応動体７の図の上方に皿ばね９があり、この
皿ばねは中心に貫通孔を有し応動体７のボス部
７′が貫通しており、内周部は応動体のボス部
７′の近傍に設けられた環状の突起部１０に圧接
し、外周部はスイツチ本体３の内壁に設けられた
１部で欠けた環状の突起部１１に圧接し、応動体
７と圧力反転板８をダイヤフラム４の方に向けて
付勢している。応動体のボス部７′は電気回路の
スイツチ端子１５と接続した接点を押圧し得るよ
うに設置され、このボス部７′を貫通しているス
イツチ駆動体１２がその下端部を圧力反転板８に
当接し、圧力反転板が反転するともう一方のスイ
ツチ端子１６と接続した接点を押圧するように設
置されている。(Example) Next, an example of the present invention will be described with reference to the drawings. FIG. 1 shows a two-acting pressure switch which is an embodiment of the present invention. The lid body 1 has a pressure introduction port 2, and a diaphragm 4 is airtightly attached to the switch body 3 by an annular packing 5 to form a pressure receiving chamber 6. The deformation of the diaphragm 4 causes the reaction body 7 to slide up and down, and at the same time moves and reverses the pressure reversal plate 8, which is provided along the inside of the diaphragm and whose outer edge is supported inside the reaction body 7. There is a disc spring 9 above the responsive body 7 in the drawing, and this disc spring has a through hole in the center, through which the boss portion 7' of the responsive body 7 passes, and the inner peripheral portion is connected to the boss portion 7' of the responsive body. The outer periphery is in pressure contact with an annular projection 10 provided near the switch body 3, and the outer periphery is in pressure contact with a partially chipped annular projection 11 provided on the inner wall of the switch body 3. It is biased toward the diaphragm 4. The boss portion 7' of the response body is installed so as to be able to press the contact connected to the switch terminal 15 of the electric circuit, and the switch drive body 12 passing through this boss portion 7' connects its lower end to the pressure reversing plate 8. When the pressure reversal plate is reversed, it presses the contact connected to the other switch terminal 16.
次に作用を説明する。圧力導入口２より圧力が
印加されるとダイヤフラム４が変形し、圧力反転
板８、応動体７が皿ばね９に抗して図の上方に移
動する。圧力が予め設定された値P1になると、
第２図に示すようにボス部７′が一方の接点を押
圧し他方の接点と圧接してスイツチONとなる。
ここで皿ばねの特性について説明する。第５図ａ
は皿ばね９の断面図であり、ｂ〜ｅは荷重Ｗ−変
位δ曲線である。皿ばねは三次曲線を示す特性が
あり、板厚ｔと打ち出し高さｈとの比ｈ／ｔを大
きくしていくと、変位曲線は第５図のｂからｅへ
と変化していく（変位曲線にループがあるのはヒ
ステリシスが生じるからである。）。本考案で使用
する皿ばねはｄの特性曲線を画くように設定され
ており下降時の設定圧をP1とし、設定圧P1のと
きに三次曲線の立上りの荷重W′に相当するよう
になつている。したがつて、第２図において圧力
がP1＋ΔP1に達すると応動体７の移動は速くなり
ボス部７′は急速に接点１３を接点１４に圧接す
ることになり、接点のチヤタリングを防止でき
る。 Next, the effect will be explained. When pressure is applied from the pressure introduction port 2, the diaphragm 4 deforms, and the pressure reversal plate 8 and the responsive body 7 move upward in the figure against the disc spring 9. When the pressure reaches the preset value P 1 ,
As shown in FIG. 2, the boss 7' presses one contact and presses against the other contact, turning the switch ON.
Here, the characteristics of the disc spring will be explained. Figure 5a
is a sectional view of the disc spring 9, and b to e are load W-displacement δ curves. Disc springs have the characteristic of exhibiting a cubic curve, and as the ratio h/t between plate thickness t and launch height h increases, the displacement curve changes from b to e in Figure 5 (displacement The reason there is a loop in the curve is because hysteresis occurs.) The disc spring used in this invention is set to draw a characteristic curve d, and the set pressure at the time of descent is P 1 , and when the set pressure is P 1 , it is set to correspond to the load W' at the rise of the cubic curve. It's summery. Therefore, when the pressure reaches P 1 +ΔP 1 in FIG. 2, the reaction body 7 moves faster and the boss 7' rapidly presses the contact 13 against the contact 14, thereby preventing the contact from chattering. .
圧力が更に上昇すると応動体７はスイツチ本体
３の段部と当接し、それ以上の移動はできなくな
る。更に圧力が上昇し設定圧P2に達すると第３
図に示すように圧力反転板８の反りの向きが反転
し図の上側に反るので、スイツチ駆動体１２は上
方に突き上げられＢ接点１４を押し上げスイツチ
OFFとする。 When the pressure increases further, the responsive body 7 comes into contact with the stepped portion of the switch body 3 and cannot move any further. When the pressure increases further and reaches the set pressure P 2 , the third
As shown in the figure, the direction of the warp of the pressure reversing plate 8 is reversed and it is warped upward in the figure, so the switch driver 12 is pushed upward and pushes up the B contact 14, causing the switch to close.
Turn it OFF.
圧力が下がると圧力反転板はある圧力値P2′で
復帰し、スイツチ駆動体１２が下がり再びスイツ
チONとなる。なおも圧力が下がると応動体７は
皿ばね９により下方に押し上げられ所定の圧P1
になるとＡ接点１３がＢ接点から急速に離れスイ
ツチOFFとなる。このように、この圧力スイツ
チは圧力がP1〜P2の間でONとなるように作用す
るものである。 When the pressure decreases, the pressure reversal plate returns to a certain pressure value P 2 ', and the switch driver 12 is lowered to turn the switch ON again. If the pressure continues to decrease, the responsive body 7 is pushed downward by the disc spring 9 to a predetermined pressure P 1
When this happens, the A contact 13 quickly separates from the B contact and the switch turns OFF. In this way, this pressure switch operates so that the pressure is turned on between P1 and P2 .
第８図ａにボス部７′、スイツチ駆動体１２の
軸方向の動き量δと受圧室６内の圧力Ｐの関係及
び、ｂに内圧力Ｐと接点のON，OFFとの関係を
示す。図中は応動体のボス部７′の動きを示し、
はスイツチ駆動体１２の動きを示している。 FIG. 8a shows the relationship between the axial movement amount δ of the boss portion 7' and the switch drive body 12 and the pressure P in the pressure receiving chamber 6, and FIG. 8b shows the relationship between the internal pressure P and ON/OFF of the contact. The figure shows the movement of the boss portion 7' of the response body.
indicates the movement of the switch driving body 12.
皿ばね９は前述のように環状の突起部１０，１
１によつて内周面及び外周面を圧接されているの
であるが、更に第５図ａに示すようにバレル加工
等によりその角に丸みがつくように仕上げられて
いるので、圧力が変化する毎に皿ばねと受部がこ
すれ合つても皿ばねの端部でスイツチ本体の内壁
や応動体のボス部７′を摩耗するおそれもなく、
したがつて使用により設定圧が変化することを防
止できる。また、摩擦が小さくなるので、皿ばね
のヒステリシスが小さくなり、皿ばねが反転する
圧力と復帰する圧力との差も小さくなる。 The disc spring 9 has an annular protrusion 10,1 as described above.
1, the inner and outer peripheral surfaces are pressed against each other, and as shown in Figure 5a, the corners are rounded by barrel processing, etc., so the pressure changes. Even if the disc spring and the receiving part rub against each other, there is no risk of the end of the disc spring wearing out the inner wall of the switch body or the boss part 7' of the response body.
Therefore, it is possible to prevent the set pressure from changing due to use. Furthermore, since the friction is reduced, the hysteresis of the disc spring is reduced, and the difference between the pressure at which the disc spring reverses and the pressure at which it returns is also reduced.
第４図は本考案の他の実施例の３動作型圧力ス
イツチを示すもので、同一符号は同一物を示して
いる。重複を避けて構成の説明をすると、接点１
３，１４で構成されるスイツチ１、接点１７，１
８で構成されるスイツチ２と、２組の圧力反転板
８ａ，８ｂと、２つの応動体７ａ，７ｂと、スイ
ツチ駆動体１２ａ，１２ｂがある。 FIG. 4 shows a three-action pressure switch according to another embodiment of the present invention, in which the same reference numerals indicate the same parts. To avoid duplication and explain the configuration, contact 1
Switch 1 consisting of 3, 14, contact 17, 1
8, two sets of pressure reversal plates 8a, 8b, two response bodies 7a, 7b, and switch drive bodies 12a, 12b.
作用を簡単に説明すると、圧力０の場合は第４
図の通り両スイツチ共にOFFである。圧力がP1
になると応動体７ａのボス部が接点１３を押して
スイツチ１が0Nになる。圧力が更に上りP2にな
ると下側の圧力反転板８ｂが反転しスイツチ駆動
体１２ｂを上方に突き上げ接点１８を押圧しスイ
ツチ２もONとなる。圧力がなお上昇しP3に達す
ると上側の圧力反転板８ａも反転し、スイツチ駆
動体１２ａを押し上げ接点１４を上方に押圧して
スイツチ１のみをOFFにする。 To explain the effect simply, when the pressure is 0, the fourth
As shown in the diagram, both switches are OFF. pressure is P 1
When this happens, the boss portion of the responsive body 7a pushes the contact 13 and the switch 1 becomes 0N. When the pressure increases further and reaches P2 , the lower pressure reversing plate 8b reverses, pushes the switch driver 12b upward, presses the contact 18, and turns on the switch 2 as well. When the pressure continues to rise and reaches P3 , the upper pressure reversing plate 8a is also reversed, pushing up the switch driving body 12a and pressing the contact 14 upward, turning only the switch 1 OFF.
即ちスイツチ１は圧力がP1からP3の間でONと
なり、スイツチ２は圧力がP1とP3の間のP2以上
でONとなる。 That is, switch 1 is turned ON when the pressure is between P 1 and P 3 , and switch 2 is turned ON when the pressure is P 2 or more between P 1 and P 3 .
皿ばね９については前の実施例である２動作型
圧力スイツチにおいて説明したのと同様である。 The disc spring 9 is the same as that described in the previous embodiment of the two-action pressure switch.
なお、皿ばねを受ける突起部１０及１１は、環
状である必要はなく、一部で切れていてもよい
し、点在する突起部であつてもよい。 Note that the protrusions 10 and 11 that receive the disc springs do not have to be annular, and may be partially cut or may be scattered protrusions.
第４図と第９図の実施例においては、スイツチ
本体３に対して、スイツチ端子１５，１６を収容
するコネクタハウジング部３′が一体に連設され
ており、相手方電気接続部材に対して圧力スイツ
チをダイレクトカツプリングするように構成され
る。 In the embodiments shown in FIGS. 4 and 9, a connector housing portion 3' for accommodating switch terminals 15, 16 is integrally connected to the switch body 3, and pressure is applied to the other electrical connection member. Configured for direct coupling to a switch.
（考案の効果）
以上に説明したように本考案によれば、皿ばね
及び圧力反転板の突出方向をダイヤフラムの突出
方向と同一にするとともに、圧力反転板をダイヤ
フラムに近接して配置した構成としたので、圧力
反転板の反転量の全てを有効に利用でき、皿ばね
の三次元特性とともに、チヤタリング無しに接点
の開閉ができる。(Effects of the invention) As explained above, according to the invention, the protruding direction of the disc spring and the pressure reversing plate is made the same as the protruding direction of the diaphragm, and the pressure reversing plate is disposed close to the diaphragm. Therefore, the entire amount of reversal of the pressure reversal plate can be used effectively, and in addition to the three-dimensional characteristics of the disc spring, the contacts can be opened and closed without chattering.
また、前記皿ばねは端面加工を施され、その外
周部は上記スイツチ本体に設けられた突起部に圧
接し、内周部は上記応動体に設けられた突起部に
圧接している構成としたので、皿ばねの面と、突
起の頂部に形成される線とは線接触になり、さら
に皿ばねの内周面及び外周面はどこにも接触しな
い構成となるので、皿ばねの摩耗は勿論、受け部
の摩耗も防止でき、受け部の摩耗による設定圧の
変化を防止して安定したスイツチング動作が期待
できる。 Further, the disc spring has an end surface processed, and its outer peripheral part is pressed against a protrusion provided on the switch body, and its inner peripheral part is pressed against a protrusion provided on the response body. Therefore, the surface of the disc spring is in line contact with the line formed at the top of the protrusion, and the inner and outer peripheral surfaces of the disc spring do not come into contact with anything, so of course the disc spring will not wear out. It also prevents wear of the receiving part, and prevents changes in the set pressure due to wear of the receiving part, so stable switching operation can be expected.
また、皿ばねのヒステリシスが小さくなるの
で、皿ばねの反転時の圧力と復帰時の圧力との差
を小さく保つことができる。 Furthermore, since the hysteresis of the disc spring is reduced, the difference between the pressure when the disc spring is reversed and the pressure when it returns can be kept small.
さらに、圧力スイツチは、所望の圧力で正確に
動作させるために、部品寸法が正確であることを
要求されるが、本発明では、皿ばねの受け部を突
起の頂部としたので、皿ばねの支持位置を正確に
特定でき、部品としてのスイツチ本体や、応動体
を製作する際の寸法管理が容易になる、等の格別
の効果を奏する。 Furthermore, pressure switches require accurate component dimensions in order to operate accurately at the desired pressure, but in the present invention, the receiving part of the disc spring is the top of the protrusion. The support position can be accurately specified, and the dimensional control when manufacturing the switch body and the response body as parts becomes easy, and other special effects are produced.
第１図は本考案の１実施例である２動作型圧力
スイツチの断面図、第２図は同上の圧力スイツチ
の低圧時スイツチONの状態の断面図、第３図は
同上の圧力スイツチの高圧時スイツチOFFの状
態の断面図、第４図は本考案の他の実施例である
３動作型圧力スイツチの断面図、第５図は皿ばね
の特性を示す図、ａは皿ばねの断面図、ｂ〜ｅは
ｈ／ｔを変化させた時の皿ばねの荷重−変位線
図、第６図は従来例を示す断面図、第７図は同じ
従来例の動作を示す断面図、ａは低圧時スイツチ
ONを示す断面図、ｂは高圧時スイツチOFFを示
す断面図、第８図はスイツチと圧力の関係を示す
図、ａは応動体とスイツチ駆動体の軸方向の動き
δと圧力Ｐの関係を示す図、ｂはスイツチの
ON，OFFと圧力Ｐの関係を示す図、第９図は本
考案のさらに他の実施例を示す断面図である。
１……蓋体、２……圧力導入口、３……スイツ
チ本体、４……ダイヤフラム、６……受圧室、７
……応動体、８……圧力反転板、９……皿ばね、
１０，１１……突起部、１２……スイツチ駆動
体、１３，１４……接点。
Fig. 1 is a cross-sectional view of a two-action pressure switch which is an embodiment of the present invention, Fig. 2 is a cross-sectional view of the same pressure switch when the switch is ON at low pressure, and Fig. 3 is a cross-sectional view of the same pressure switch when the switch is ON at low pressure. 4 is a sectional view of a three-action pressure switch which is another embodiment of the present invention, FIG. 5 is a diagram showing the characteristics of a disc spring, and a is a sectional view of a disc spring. , b to e are load-displacement diagrams of the disc spring when h/t is changed, FIG. 6 is a sectional view showing a conventional example, FIG. 7 is a sectional view showing the operation of the same conventional example, and a is a sectional view showing the operation of the same conventional example. Low pressure switch
Figure 8 is a diagram showing the relationship between the switch and pressure. Figure a shows the relationship between the axial movement δ of the response body and the switch driving body and the pressure P. Figure b shows the switch
A diagram showing the relationship between ON, OFF and pressure P, and FIG. 9 is a sectional view showing still another embodiment of the present invention. 1...Lid body, 2...Pressure inlet, 3...Switch body, 4...Diaphragm, 6...Pressure receiving chamber, 7
...Response body, 8 ... Pressure reversal plate, 9 ... Belleville spring,
10, 11... Protrusion, 12... Switch driver, 13, 14... Contact.
Claims (1)
ダイヤフラムを気密に固着した受圧室を有する蓋
体と、前記ダイヤフラムの変形に応じて一定量内
で移動し中心に貫通孔を有し前記接点を押圧する
ボス部を備えた応動体と、該応動体と前記ダイヤ
フラムとの中間に設けられた圧力反転板と、前記
応動体の貫通孔を貫通し圧力反転板の反転に追従
して閉成した接点を開成するスイツチ駆動体と、
前記応動体をダイヤフラムに向かつて付勢する反
転型の皿ばねとからなり、受圧室の圧力上昇に伴
い皿ばねが先に反転し、その後圧力反転板が反転
する圧力スイツチにおいて、 前記皿ばね及び圧力反転板の突出方向をダイヤ
フラムの突出方向と同一にするとともに、圧力反
転板をダイヤフラムに近接して配置し、前記皿ば
ねは端面加工を施され外周部は上記スイツチ本体
に設けられた突起部に圧接し、内周部は上記応動
体に設けられた突起部に圧接していることを特徴
とする圧力スイツチ。[Scope of Claim for Utility Model Registration] A lid body having a pressure receiving chamber in which a diaphragm is airtightly fixed between a pressure inlet and a contact point for opening and closing an electric circuit, and a lid body that moves within a certain amount according to the deformation of the diaphragm to the center. a pressure reversing plate provided between the responsive body and the diaphragm, and a pressure reversing plate penetrating through the through hole of the responsive body; a switch driver that opens a closed contact following the reversal of the switch;
A pressure switch comprising a reversible disc spring that biases the response body toward the diaphragm, and in which the disc spring is first reversed as the pressure in the pressure receiving chamber increases, and then the pressure reversal plate is reversed, the disc spring and The protruding direction of the pressure reversing plate is made the same as the protruding direction of the diaphragm, and the pressure reversing plate is arranged close to the diaphragm. 1. A pressure switch characterized in that the pressure switch is in pressure contact with a protrusion provided on the response body, and an inner peripheral portion is in pressure contact with a protrusion provided on the response body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987069650U JPH0438440Y2 (en) | 1987-05-12 | 1987-05-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987069650U JPH0438440Y2 (en) | 1987-05-12 | 1987-05-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63179630U JPS63179630U (en) | 1988-11-21 |
| JPH0438440Y2 true JPH0438440Y2 (en) | 1992-09-09 |
Family
ID=30910577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987069650U Expired JPH0438440Y2 (en) | 1987-05-12 | 1987-05-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0438440Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5638274U (en) * | 1979-08-31 | 1981-04-10 |
-
1987
- 1987-05-12 JP JP1987069650U patent/JPH0438440Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5638274U (en) * | 1979-08-31 | 1981-04-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63179630U (en) | 1988-11-21 |
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