JPH07192591A - Reed switch - Google Patents
Reed switchInfo
- Publication number
- JPH07192591A JPH07192591A JP5333278A JP33327893A JPH07192591A JP H07192591 A JPH07192591 A JP H07192591A JP 5333278 A JP5333278 A JP 5333278A JP 33327893 A JP33327893 A JP 33327893A JP H07192591 A JPH07192591 A JP H07192591A
- Authority
- JP
- Japan
- Prior art keywords
- lead wire
- reed switch
- inflection
- glass tube
- bent portion
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/58—Thermally-sensitive members actuated due to thermally controlled change of magnetic permeability
- H01H37/585—Thermally-sensitive members actuated due to thermally controlled change of magnetic permeability the switch being of the reed switch type
Landscapes
- Thermally Actuated Switches (AREA)
Abstract
(57)【要約】
【目的】引張力や圧縮力に起因したリード線の変形によ
るガラス管の割れを防止することができるリードスイッ
チを提供することを目的とする。
【構成】このリードスイッチ２は、ガラス管３から引き
出されたリード線７、８に、くの字状の曲折部９、１０
が設けられる。曲折部９は、リード線７の先端側に位置
する第一変曲部９ａとガラス管側に位置する第三変曲部
９ｃとその中間に位置する第二変曲部９ｂとからなり、
第三変曲部９ｃの曲げ角度が第一変曲部９ａと第二変曲
部９ｂの曲げ角度より大きく形成される。
(57) [Abstract] [Purpose] An object of the present invention is to provide a reed switch capable of preventing the glass tube from cracking due to the deformation of the lead wire caused by the tensile force or the compressive force. [Structure] This reed switch 2 is provided with lead wires 7 and 8 drawn out from a glass tube 3 and bent portions 9 and 10 in a dogleg shape.
Is provided. The bent portion 9 includes a first bent portion 9a located on the tip side of the lead wire 7, a third bent portion 9c located on the glass tube side, and a second bent portion 9b located in the middle thereof.
The bending angle of the third bending portion 9c is formed to be larger than the bending angles of the first bending portion 9a and the second bending portion 9b.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、温度スイッチ、液面ス
イッチ等に使用されるリードスイッチに関し、ガラス管
から引き出されるリード線に曲折部を設けたリードスイ
ッチに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reed switch used for a temperature switch, a liquid level switch and the like, and more particularly to a reed switch in which a lead wire drawn from a glass tube has a bent portion.
【０００２】[0002]
【従来の技術】従来、この種のリードスイッチにおい
て、そのガラス管から引き出されたリード線に、略くの
字状の曲折部を設けて、リード線に生じる熱応力を吸収
する構造のものが、実開昭５３−１０４３４２号公報等
で知られている。2. Description of the Related Art Conventionally, in a reed switch of this type, a lead wire pulled out from the glass tube is provided with a bent portion having a substantially V shape so as to absorb a thermal stress generated in the lead wire. , Japanese Utility Model Laid-Open No. 53-104342 and the like.
【０００３】[0003]
【発明が解決しようとする課題】このリードスイッチ
は、温度変化による熱膨張や熱収縮によりリード線に印
加される熱応力を、リード線の一部に設けたくの字状の
曲折部で吸収する構造であるが、その熱膨張や熱収縮が
比較的小さい場合は問題はない。しかし、リード線が接
続された部分の変形等により大きい引張力や圧縮力がリ
ード線に印加された場合、図４に示すように、リード線
２１に形成された曲折部２２のガラス管２３側の変曲部
２２ａが、リード線２１の軸方向と直交する方向（例え
ば引張り力の場合、図４の右方向矢印）に変位する変形
力を受け、この変形力が大きい場合、ガラス管はリード
線曲げ方向の強度が低いため、リード線２１と接するガ
ラス管の先端付近に割れが生じる恐れがあった。This reed switch absorbs the thermal stress applied to the lead wire due to the thermal expansion and contraction due to the temperature change by the dogleg-shaped bent portion provided in a part of the lead wire. Although it is a structure, there is no problem if its thermal expansion or thermal contraction is relatively small. However, when a larger tensile force or compressive force is applied to the lead wire due to deformation of the portion to which the lead wire is connected, as shown in FIG. 4, the bent portion 22 formed on the lead wire 21 side of the glass tube 23 The inflection part 22a receives a deforming force that displaces in a direction orthogonal to the axial direction of the lead wire 21 (for example, in the case of a tensile force, the right arrow in FIG. 4), and when this deforming force is large, the glass tube is reed. Since the strength in the wire bending direction is low, there is a possibility that cracks may occur near the tip of the glass tube that contacts the lead wire 21.
【０００４】本発明は、上記の点に鑑みてなされたもの
で、引張力や圧縮力に起因したリード線の変形によるガ
ラス管の割れを防止することができるリードスイッチを
提供することを目的とする。The present invention has been made in view of the above points, and an object thereof is to provide a reed switch capable of preventing the glass tube from cracking due to the deformation of the lead wire due to the tensile force and the compressive force. To do.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明のリードスイッチは、ガラス管から引き出さ
れたリード線にくの字状の曲折部が設けられてなるリー
ドスイッチにおいて、その曲折部は、リード線の先端側
に位置する第一変曲部とガラス管側に位置する第三変曲
部とその中間に位置する第二変曲部とからなり、第三変
曲部の曲げ角度が第一変曲部と第二変曲部の曲げ角度よ
り大きく形成されて構成される。In order to achieve the above object, the reed switch of the present invention is a reed switch in which a lead wire pulled out from a glass tube is provided with a dogleg-shaped bent portion. The bent portion is composed of a first bent portion located on the tip side of the lead wire, a third bent portion located on the glass tube side, and a second bent portion located in the middle thereof. The bending angle is formed to be larger than the bending angles of the first inflection portion and the second inflection portion.
【０００６】さらに、第一変曲部と第二変曲部間のリー
ド線部の軸方向に対する傾斜角度は、第二変曲部と第三
変曲部間のリード線部の軸方向に対する傾斜角度より大
きく形成するとよい。Further, the inclination angle of the lead wire portion between the first inflection portion and the second inflection portion with respect to the axial direction is the inclination angle of the lead wire portion between the second inflection portion and the third inflection portion with respect to the axial direction. It is better to form it larger than the angle.
【０００７】[0007]
【作用・効果】このような構成のリードスイッチでは、
リード線が接続された部分の変形等により、そのリード
線に引張力が作用した場合、先ず、リード線の先端側の
曲げ角度の大きい第一変曲部が変形を始め、引張力はそ
の殆どが第一変曲部の変形に使われ、曲げ角度の小さい
ガラス管側の第三変曲部は殆ど変形しない。[Operation / effect] With the reed switch having such a configuration,
When tensile force acts on the lead wire due to deformation of the part to which the lead wire is connected, first, the first inflection part with a large bending angle on the tip side of the lead wire begins to deform, and the tensile force is almost always Is used to deform the first inflection part, and the third inflection part on the glass tube side with a small bending angle is hardly deformed.
【０００８】また、リード線に圧縮力が作用した場合も
同様に、先ず、リード線の先端側の曲げ角度の大きい第
一変曲部が変形を始め、圧縮力はその殆どが第一変曲部
の変形に使われ、曲げ角度の小さいガラス管側の第三変
曲部は殆ど変形しない。Similarly, when a compressive force acts on the lead wire, first, the first inflection portion having a large bending angle on the tip side of the lead wire begins to deform, and most of the compressive force is the first inflection. It is used for part deformation, and the third bending part on the side of the glass tube with a small bending angle hardly deforms.
【０００９】このため、ガラス管に近いリード線の部分
において、軸方向と直交する方向の変形力は殆ど生じ
ず、リード線と接するガラス管の先端付近に割れが生じ
ることは防止される。Therefore, in the portion of the lead wire close to the glass tube, almost no deformation force is generated in the direction orthogonal to the axial direction, and it is possible to prevent cracks from occurring near the tip of the glass tube in contact with the lead wire.
【００１０】[0010]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１１】図１はこの発明のリードスイッチを使用し
た自動車用の温度スイッチを示している。１は円筒状に
形成されたハウジングであり、ハウジング１内に縦にリ
ードスイッチ２が配設される。FIG. 1 shows a temperature switch for an automobile using the reed switch of the present invention. Reference numeral 1 denotes a cylindrical housing, and a reed switch 2 is vertically arranged in the housing 1.
【００１２】リードスイッチ２のガラス管３の外周部に
は環状の磁石４と５が装着され、磁石４と５の間に、温
度に応じて透磁率が急速に変化する感温フェライト素子
６が配設される。Ring-shaped magnets 4 and 5 are mounted on the outer peripheral portion of the glass tube 3 of the reed switch 2, and a temperature-sensitive ferrite element 6 whose magnetic permeability changes rapidly according to temperature is mounted between the magnets 4 and 5. It is arranged.
【００１３】さらに、リードスイッチ２には、ガラス管
３の上部（端子側）からリード線７が引き出され、下部
（先端側）からリード線８が引き出されているが、その
リード線７の一部に、略くの字状の曲折部９が設けら
れ、リード線８の一部にも略くの字状の曲折部１０が設
けられる。リード線８には、例えば、直径０．６mmの鉄
・ニッケル合金線が使用される。Further, in the reed switch 2, the lead wire 7 is drawn out from the upper part (terminal side) of the glass tube 3 and the lead wire 8 is drawn out from the lower part (tip side). A bent portion 9 having a substantially V shape is provided in the portion, and a bent portion 10 having a substantially V shape is also provided in a part of the lead wire 8. For the lead wire 8, for example, an iron / nickel alloy wire having a diameter of 0.6 mm is used.
【００１４】上部のリード線７に設けられた曲折部９
は、図２に示すように、リード線７の先端側に位置する
第一変曲部９ａとガラス管側に位置する第三変曲部９ｃ
とその中間に位置する第二変曲部９ｂとからなり、第三
変曲部９ｃの曲げ角度α３が第一変曲部９ａの曲げ角度
α１と第二変曲部９ｂの曲げ角度α２より大きく形成さ
れる。A bent portion 9 provided on the upper lead wire 7.
2, as shown in FIG. 2, the first inflection part 9a located on the tip side of the lead wire 7 and the third inflection part 9c located on the glass tube side.
And a second inflection portion 9b positioned in the middle thereof, the bending angle α3 of the third inflection portion 9c is larger than the bending angle α1 of the first inflection portion 9a and the bending angle α2 of the second inflection portion 9b. It is formed.
【００１５】さらに、第一変曲部９ａと第二変曲部９ｂ
間のリード線部の軸方向に対する傾斜角度β１は、第二
変曲部９ｂと第三変曲部９ｃ間のリード線部の軸方向に
対する傾斜角度β２より大きく形成される。Further, the first inflection portion 9a and the second inflection portion 9b.
An inclination angle β1 of the lead wire portion between them with respect to the axial direction is formed larger than an inclination angle β2 of the lead wire portion between the second inflection portion 9b and the third inflection portion 9c with respect to the axial direction.
【００１６】ハウジング１の上部は、積層板１３とゴム
シート１４及び充填材１２により閉鎖され、積層板１３
とゴムシート１４には貫通孔が設けられ、そこに端子部
１１がハウジング１と絶縁された状態で嵌合・固定され
る。リード線７の先端はその端子部１１の基部に半田付
けされ、また、下部のリード線８の先端はハウジング１
の先端部に半田付けされる。The upper part of the housing 1 is closed by the laminated plate 13, the rubber sheet 14 and the filling material 12, and the laminated plate 13 is closed.
The rubber sheet 14 is provided with a through hole, and the terminal portion 11 is fitted and fixed thereto in a state of being insulated from the housing 1. The tip of the lead wire 7 is soldered to the base of the terminal portion 11, and the tip of the lower lead wire 8 is soldered to the housing 1.
Is soldered to the tip.
【００１７】上記構成の温度スイッチは、例えば、自動
車の冷却水温度検出用に使用され、冷却水ジャケット等
に装着され、その温度が設定温度より低い場合、磁石４
と５から感温フェライト素子６を通して磁束が流れ、リ
ードスイッチ２の接点部に磁力が生じ、スイッチがオン
している。The temperature switch having the above construction is used, for example, for detecting the cooling water temperature of an automobile and is mounted on a cooling water jacket or the like. When the temperature is lower than the set temperature, the magnet 4 is used.
A magnetic flux flows from the and 5 through the temperature sensitive ferrite element 6, a magnetic force is generated at the contact portion of the reed switch 2, and the switch is turned on.
【００１８】温度が設定温度以上になると、感温フェラ
イト素子６の透磁率が急激に低下し、磁石４と５間の磁
束が遮断される。そのため、リードスイッチ２の接点部
の磁力が低下し、スイッチがオフする。When the temperature rises above the set temperature, the magnetic permeability of the temperature-sensitive ferrite element 6 drops sharply and the magnetic flux between the magnets 4 and 5 is cut off. Therefore, the magnetic force of the contact portion of the reed switch 2 is reduced, and the switch is turned off.
【００１９】一方、温度変化により、積層板１３が上方
に膨らむように変形した場合、その変形等により、リー
ドスイッチ２のリード線７に引張力が作用する。このと
き、先ず、図２の破線に示すように、リード線７の曲折
部９における先端側の曲げ角度の大きい第一変曲部９ａ
が変形を始め、引張力はその殆どが第一変曲部９ａの変
形に使われ、曲げ角度の小さいガラス管側の第三変曲部
９ｃは殆ど変形しない。On the other hand, when the laminated plate 13 is deformed so as to bulge upward due to temperature change, tensile force acts on the lead wire 7 of the reed switch 2 due to the deformation or the like. At this time, first, as shown by the broken line in FIG. 2, the first bending portion 9a having a large bending angle on the tip side of the bending portion 9 of the lead wire 7.
Starts to deform, and most of the tensile force is used for deforming the first inflection part 9a, and the third inflection part 9c on the glass tube side having a small bending angle hardly deforms.
【００２０】また、温度変化により、積層板１３が内側
にへこむように変形した場合、リードスイッチ２のリー
ド線７に圧縮力が作用する。このときも、先ず、リード
線７の曲折部９における先端側の曲げ角度の大きい第一
変曲部９ａが変形を始め、圧縮力はその殆どが第一変曲
部９ａと第二変曲部９ｂの変形に使われ、図３に示すよ
うに、曲げ角度の小さいガラス管側の第三変曲部９ｃは
殆ど変形しない。When the laminated plate 13 is deformed so as to be dented inward due to temperature change, a compressive force acts on the lead wire 7 of the reed switch 2. Also at this time, first, the first bending portion 9a of the bent portion 9 of the lead wire 7 having a large bending angle on the tip side starts to be deformed, and most of the compressive force is the first bending portion 9a and the second bending portion. It is used for the deformation of 9b, and as shown in FIG. 3, the third bending portion 9c on the glass tube side having a small bending angle is hardly deformed.
【００２１】このため、ガラス管３に近いリード線７の
部分において、軸方向と直交する方向の変形力は殆ど生
じず、リード線７と接するガラス管３の先端付近に割れ
が生じることは防止される。Therefore, in the portion of the lead wire 7 close to the glass tube 3, almost no deformation force is generated in the direction orthogonal to the axial direction, and cracks are prevented from occurring near the tip of the glass tube 3 in contact with the lead wire 7. To be done.
【図１】本発明のリードスイッチ２を使用した温度スイ
ッチの断面図である。FIG. 1 is a cross-sectional view of a temperature switch using a reed switch 2 of the present invention.
【図２】リードスイッチ２の部分拡大図である。FIG. 2 is a partially enlarged view of a reed switch 2.
【図３】リードスイッチ２のリード線に圧縮力が作用し
た際の部分拡大図である。FIG. 3 is a partially enlarged view when a compressive force acts on a lead wire of a reed switch 2.
【図４】従来のリードスイッチの部分拡大図である。FIG. 4 is a partially enlarged view of a conventional reed switch.
１−ハウジング、２−リードスイッチ、３−ガラス管、
７、８−リード線、９、１０−曲折部、９ａ−第一変曲
部、９ｂ−第二変曲部、９ｃ−第三変曲部。1-housing, 2-reed switch, 3-glass tube,
7, 8-lead wire, 9, 10-bent portion, 9a-first inflection portion, 9b-second inflection portion, 9c-third inflection portion.
Claims (2)
くの字状の曲折部が設けられてなるリードスイッチにお
いて、 該曲折部は、該リード線の先端側に位置する第一変曲部
と、該ガラス管側に位置する第三変曲部と、該第一変曲
部と該第三変曲部の中間に位置する第二変曲部とからな
り、該第三変曲部の曲げ角度が該第一変曲部及び該第二
変曲部の曲げ角度より大きく形成されていることを特徴
とするリードスイッチ。1. A lead wire drawn from a glass tube,
In a reed switch provided with a V-shaped bent portion, the bent portion includes a first bent portion located on the tip side of the lead wire and a third bent portion located on the glass tube side. A first inflection portion and a second inflection portion located between the third inflection portion, the bending angle of the third inflection portion being the first inflection portion and the second inflection portion. A reed switch characterized in that it is formed to be larger than the bending angle of the portion.
線部の軸方向に対する傾斜角度は、該第二変曲部と第三
変曲部間のリード線部の軸方向に対する傾斜角度より大
きく形成されていることを特徴とする請求項１記載のリ
ードスイッチ。2. The angle of inclination of the lead wire portion between the first inflection portion and the second inflection portion with respect to the axial direction is determined by the axial direction of the lead wire portion between the second inflection portion and the third inflection portion. The reed switch according to claim 1, wherein the reed switch is formed to have a larger inclination angle with respect to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33327893A JP3428106B2 (en) | 1993-12-27 | 1993-12-27 | Reed switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33327893A JP3428106B2 (en) | 1993-12-27 | 1993-12-27 | Reed switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07192591A true JPH07192591A (en) | 1995-07-28 |
| JP3428106B2 JP3428106B2 (en) | 2003-07-22 |
Family
ID=18264312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33327893A Expired - Fee Related JP3428106B2 (en) | 1993-12-27 | 1993-12-27 | Reed switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3428106B2 (en) |
-
1993
- 1993-12-27 JP JP33327893A patent/JP3428106B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3428106B2 (en) | 2003-07-22 |
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