JPH03122935A - Normally open thermo-sensitive switch and manufacture thereof - Google Patents
Normally open thermo-sensitive switch and manufacture thereofInfo
- Publication number
- JPH03122935A JPH03122935A JP26090089A JP26090089A JPH03122935A JP H03122935 A JPH03122935 A JP H03122935A JP 26090089 A JP26090089 A JP 26090089A JP 26090089 A JP26090089 A JP 26090089A JP H03122935 A JPH03122935 A JP H03122935A
- Authority
- JP
- Japan
- Prior art keywords
- metal tube
- heat
- resistant metal
- temperature
- normally open
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 83
- 239000002184 metal Substances 0.000 claims abstract description 83
- 239000000843 powder Substances 0.000 claims abstract description 40
- 239000000919 ceramic Substances 0.000 claims abstract description 30
- 239000000155 melt Substances 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000003566 sealing material Substances 0.000 claims description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 9
- 239000000395 magnesium oxide Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000012856 packing Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910000914 Mn alloy Inorganic materials 0.000 description 3
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052810 boron oxide Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
Landscapes
- Fuses (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は主に、自動車の排気ガスを浄化するための触媒
式の浄化装置に装着し、この浄化装置が異常昇温しなと
き可溶金属が溶けて電気導通路を形成する感温スイッチ
に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is mainly applied to a catalytic purification device for purifying automobile exhaust gas, and when the purification device does not have an abnormal temperature rise, The present invention relates to a temperature-sensitive switch in which metal melts to form an electrically conductive path.
［従来の技術］
従来の技術を第７図とともに述べる。感温スイッチＢは
、後端を密封材８００で封止して絶縁粉末８１０を充填
した耐熱金属管８２０中に、電極８３０および可溶金属
（図示せず）を配設してなる。感温部位８４０が所定温
度以」−に昇温すると、前記可溶金属が溶けて電気導通
路８５０ができる。[Prior Art] The conventional technology will be described with reference to FIG. The temperature-sensitive switch B includes an electrode 830 and a fusible metal (not shown) arranged in a heat-resistant metal tube 820 whose rear end is sealed with a sealant 800 and filled with insulating powder 810. When the temperature of the temperature sensitive part 840 rises to a predetermined temperature or higher, the fusible metal melts and an electrically conductive path 850 is formed.
［発明が解決しようとする課題］
しかるに、感温スイッチＢは絶縁粉末８１０の充填密度
が一定であるので、溶けた可溶金属は分散して絶縁粉末
８１０中を浸透する。このため、電気導通路８５０は途
ぎれがちとなり、所定温度に達しても電気導通が得られ
ない場合が往々にしである。[Problems to be Solved by the Invention] However, in the temperature-sensitive switch B, since the packing density of the insulating powder 810 is constant, the melted fusible metal disperses and permeates through the insulating powder 810. For this reason, the electrical conduction path 850 tends to be interrupted, and electrical continuity is often not obtained even when a predetermined temperature is reached.
本発明の目的は、信頼性に優れた常開形感温スイッチの
提供、およびその製造方法の提供にある。An object of the present invention is to provide a normally open temperature-sensitive switch with excellent reliability and a method for manufacturing the same.
［課題を解決するための手段］
本発明は上記目的を達成するため、つぎの構成を採用し
た。[Means for Solving the Problems] In order to achieve the above object, the present invention employs the following configuration.
先端閉塞の耐熱金属管と、該耐熱金属管と電気絶縁を図
って挿入して配される棒状電極と、前記耐熱金属管に充
填される絶縁性セラミック粉末と、前記耐熱金属管の感
温部位内に配されるとともに、所定温度で溶融して前記
棒状電極と耐熱金属管との間に電気導通路を形成する可
溶金属とを備えてなる常開形感温スイッチにおいて、前
記感温部位における前記絶縁性セラミック粉末の充填度
合いを、他の充填部分より粗くしている。A heat-resistant metal tube with a closed end, a rod-shaped electrode inserted and arranged to be electrically insulated from the heat-resistant metal tube, an insulating ceramic powder filled in the heat-resistant metal tube, and a temperature-sensitive portion of the heat-resistant metal tube. In the normally open temperature-sensitive switch, the normally-open temperature-sensitive switch is provided with a fusible metal that is placed inside the tube and melts at a predetermined temperature to form an electrical conduction path between the rod-shaped electrode and the heat-resistant metal tube. The degree of filling of the insulating ceramic powder in the portion is made coarser than in other filling portions.
常開形感温スイッヂの製造は、電気絶縁性セラミックの
基台を、先端閉塞の耐熱金属管内底に載置し、続いて、
棒状電極および所定温度で溶融する可溶金属を先端面よ
り露出状態に、貫装および配設した電気絶縁性セラミッ
クの成形柱を遊嵌し、前記耐熱金属管内の各隙間にセラ
ミック粉末を充填し、前記耐熱金属管に減径絞り加工を
行って前記基台および成形柱を粉砕し、前記耐熱金属管
の開口を電気絶縁性のガラスシール材で塞ぐとともに、
このガラスシール材に前記棒状電極を貫通状態に配設し
て行う。To manufacture a normally open temperature-sensitive switch, an electrically insulating ceramic base is placed on the inner bottom of a heat-resistant metal tube with a closed end, and then
A rod-shaped electrode and a fusible metal that melts at a predetermined temperature are exposed from the tip surface, and a molded column of electrically insulating ceramic is loosely fitted through the tube, and each gap in the heat-resistant metal tube is filled with ceramic powder. , performing a diameter-reducing drawing process on the heat-resistant metal tube to crush the base and the molded column, and sealing the opening of the heat-resistant metal tube with an electrically insulating glass sealing material;
This is done by disposing the rod-shaped electrode in a penetrating state through this glass sealing material.
［作用および発明の効果］ 本発明は、つぎの作用、および効果を奏する。[Action and effect of invention] The present invention has the following functions and effects.
く請求項１について〉
感温部位における絶縁性セラミック粉末の充填度合いを
、他の充填部分より粗くしている。ここで、所定温度と
なり可溶金属が溶融すると、溶けた可溶金属は充填度合
いの粗い部分を通って耐熱金属管の内壁に達する。つま
り、電気導通路は感温部位に集中して形成されるので、
所定温度で確実に接点を開成でき、常開形感温スイッチ
の信頼性は極めて高い。Regarding Claim 1> The degree of filling of the insulating ceramic powder in the temperature-sensitive portion is made coarser than in other filling portions. Here, when the temperature reaches a predetermined temperature and the fusible metal melts, the melted fusible metal reaches the inner wall of the heat-resistant metal tube through the coarsely filled portion. In other words, electrical conduction paths are formed concentrated in the temperature-sensitive area, so
Since the contact can be reliably opened at a predetermined temperature, the reliability of normally open temperature-sensitive switches is extremely high.
く請求項２について〉
（作用）
基台を耐熱金属管内底に載置し、成形柱を遊嵌すると、
棒状電極または可溶金属が基台に当接し、基台と成形柱
との間に間隙ができる。Regarding Claim 2> (Function) When the base is placed on the inner bottom of the heat-resistant metal tube and the formed column is fitted loosely,
The rod-shaped electrode or fusible metal contacts the base, creating a gap between the base and the molded column.
セラミック粉末を成形柱と耐熱金属管との隙間から入れ
、各隙間をセラミック粉末で埋める。Ceramic powder is introduced into the gap between the molded column and the heat-resistant metal tube, and each gap is filled with ceramic powder.
耐熱金属管に減径絞り加工を行い、基台および成形柱を
粉砕させると、粉砕粉の占める部位は充填度合いが密と
なる。When a heat-resistant metal tube is subjected to a diameter-reducing drawing process and the base and molded column are crushed, the areas occupied by the crushed powder become densely packed.
ガラスシール材で耐熱金属管の開口を密封し、棒状電極
を耐熱金属管と電気絶縁を図って固定する。The opening of the heat-resistant metal tube is sealed with a glass sealant, and the rod-shaped electrode is fixed to the heat-resistant metal tube while electrically insulating it.
感温部位が所定温度以上となると、可溶金属が溶融し、
この溶けた可溶金属は充填密度が小さい上記セラミック
粉末の占める部位を浸透して耐熱金属管内壁に達する。When the temperature-sensitive part reaches a certain temperature or higher, the fusible metal melts,
This molten fusible metal penetrates the area occupied by the ceramic powder, which has a small packing density, and reaches the inner wall of the heat-resistant metal tube.
つまり、電気導通路は感温部位内のセラミック粉末内に
集中して形成される。In other words, electrical conduction paths are formed in a concentrated manner within the ceramic powder within the temperature-sensitive region.
（効果）
（ア）耐熱金属管に減径絞り加：［を行って基台および
成形柱を粉砕することで感温部位における絶縁性セラミ
ック粉末の充填度合いを粗くしている。(Effects) (a) Drawing to reduce the diameter of the heat-resistant metal tube: By performing this to crush the base and molded column, the degree of filling of the insulating ceramic powder in the temperature-sensitive area is made coarser.
本方法によればこのような常開形感温スイッチを容易に
製造することができる。According to this method, such a normally open temperature-sensitive switch can be easily manufactured.
（イ）基台の寸法（軸方向）の長短で感温部位の位置ぎ
めを自由にできる。(a) The temperature-sensitive area can be positioned freely by changing the length of the base (in the axial direction).
［実施例］ 本発明の一実施例を第１図〜第６図に基づき説明する。[Example] An embodiment of the present invention will be described based on FIGS. 1 to 6.
第１図および第２図に示すごとく、常開形感温スイッチ
Ａは、先端を閉塞材１１で閉塞した耐熱金属管１を備え
る。この耐熱金属管１には電気絶縁を図って棒状電極２
が挿入して配される。また、耐熱金属管１の感温部位１
０内には、所定温度で溶融して棒状電極２と耐熱金属管
１内壁１２との間に電気導通路３（第５図参照）を形成
する可溶金属線４が配される。さらに、耐熱金属管１内
には絶縁性セラミック粉末５．６．７が充填され、前記
感温部位１０における絶縁性セラミック粉末うの充填度
合いを、他の充填部分より租＜シている。As shown in FIGS. 1 and 2, the normally open temperature-sensitive switch A includes a heat-resistant metal tube 1 whose tip is closed with a closing material 11. As shown in FIGS. This heat-resistant metal tube 1 is provided with a rod-shaped electrode 2 for electrical insulation.
is inserted and arranged. In addition, the temperature-sensitive portion 1 of the heat-resistant metal tube 1
A fusible metal wire 4 is disposed within the tube 0 to form an electric conduction path 3 (see FIG. 5) between the rod-shaped electrode 2 and the inner wall 12 of the heat-resistant metal tube 1 by melting at a predetermined temperature. Further, the heat-resistant metal tube 1 is filled with insulating ceramic powder 5, 6, 7, and the degree of filling of the insulating ceramic powder in the temperature-sensitive portion 10 is smaller than that in other filling portions.
耐熱金属管１は、耐熱金属、好ましくは５ＵＳ３０４．
５ＵＳ３１０で形成され、略試験管形状を呈している。The heat-resistant metal tube 1 is made of a heat-resistant metal, preferably 5US304.
It is made of 5US310 and has an approximately test tube shape.
なお、閉塞材１１も同じく耐熱金属材質である。この耐
熱金属管１の開口１３は、シリカ２０％、酸化硼素３０
％、酸化亜鉛２５％を主成分としたガラス１４で密封さ
れている。このガラス１４により前記電極２は固定され
る。Note that the closing material 11 is also made of a heat-resistant metal material. The opening 13 of this heat-resistant metal tube 1 is made of 20% silica and 30% boron oxide.
%, and is sealed with glass 14 whose main component is 25% zinc oxide. The electrode 2 is fixed by this glass 14.
電極２は、棒状を呈し、ニッケルを主成分とする耐熱鋼
で形成されている。この電極２の先端は５字状に曲げら
れ、後端は前記ガラス１４を貫通してリード線（図示せ
ず）に接続されている。The electrode 2 has a rod shape and is made of heat-resistant steel containing nickel as a main component. The tip of this electrode 2 is bent into a 5-shape, and the rear end passes through the glass 14 and is connected to a lead wire (not shown).
可溶金属線４は、４ｕ字状を呈し、銅−マンガン合金で
形成されている。この可溶金属Ｊｉ４は、拘泥電極２に
直交して配されている。The fusible metal wire 4 has a 4U shape and is made of a copper-manganese alloy. This fusible metal Ji4 is disposed perpendicular to the retention electrode 2.
絶縁性セラミック粉末５は、酸化マグネシウム粉末であ
る。Insulating ceramic powder 5 is magnesium oxide powder.
絶縁性セラミック粉末６．７は、前記粉末５より緻密に
充填された酸化マグネシウム粉末である。The insulating ceramic powder 6.7 is a magnesium oxide powder packed more densely than the powder 5.
つぎに、常開形感温スイッチＡの製造方法を第４図とと
もに述べる。Next, a method for manufacturing the normally open temperature-sensitive switch A will be described with reference to FIG.
１、開口１０１を有する金属管１００ （ＳＵＳ３０４
）の前記開口１０１に閉塞材１１０（ＳＵＳ３０４）を
溶接する。1. Metal tube 100 with opening 101 (SUS304
) A closing material 110 (SUS304) is welded to the opening 101.
２、素材粒度が２５０ｍｅｓｈパス６０％以上の酸化マ
グネシウム粉末を成形焼成（１６００℃以」〕）シて円
柱形状の基台７００を製造し、前記金属管１００内底に
載置する。なお、基台７００の直径は金属管１００の内
径より若干小さく（隙間Ｕ≦０．３ｍｍ）されている。2. A cylindrical base 700 is manufactured by molding and firing (1600° C. or higher) magnesium oxide powder having a material particle size of 250 mesh pass 60% or more, and placing it on the inner bottom of the metal tube 100. Note that the diameter of the base 700 is slightly smaller than the inner diameter of the metal tube 100 (gap U≦0.3 mm).
３、先端を５字状に曲げた電極線２００、および０字状
に曲げた直径０．３ｍｍ〜１．５ｍｍの銅−マンガン合
金線４００ （Ｃｕ７７％、Ｍｎ２３％）を用意する。3. Prepare an electrode wire 200 whose tip is bent into a 5-shape, and a copper-manganese alloy wire 400 (77% Cu, 23% Mn) with a diameter of 0.3 mm to 1.5 mm and whose tip is bent into a 0-shape.
素材粒度が２５０ｍｅｓｈパス６０％以上の酸化マグネ
シウム粉末を４つ穴付き成形バイブロ００に成形焼成（
１６００℃以上）する、対向する１対の上記穴に、電極
線２００、合金線４００の順に差し込む、電極線２００
と合金線４００とは接触し、露出長ｔを１ｍｍ〜５ｍｍ
（好ましくは１ｍｍ〜２ｍｍ）の範囲にする。Magnesium oxide powder with a material particle size of 250 mesh pass 60% or more is molded and fired into a molded Vibro 00 with 4 holes (
1600° C. or higher), insert the electrode wire 200 and the alloy wire 400 in this order into the pair of opposing holes.
and the alloy wire 400 are in contact, and the exposed length t is 1 mm to 5 mm.
(preferably 1 mm to 2 mm).
４、上記成形バイブロ００を金属管１００内に遊びをも
った状態（隙間Ｓ≦０．３ｍｍ）に嵌込み、合金線２０
０を基台７００に当接させる。4. Fit the molded Vibro 00 into the metal tube 100 with some play (gap S≦0.3 mm), and insert the alloy wire 20
0 is brought into contact with the base 700.
５、金属管１００に振動を加えながら金属管１００内の
隙間１０２に、粒度が４８１ｎｅｓｈ〜２５０ｍｅｓｈ
が６０％以上、２００ｍｅｓｈ〜３００ｍｅｓｈが残の
粗い酸化マグネシウム粉末（絶縁性セラミック粉末５）
を充填する。5. While applying vibration to the metal tube 100, a particle size of 481 mesh to 250 mesh is applied to the gap 102 inside the metal tube 100.
Coarse magnesium oxide powder with 60% or more and 200mesh to 300mesh remaining (insulating ceramic powder 5)
Fill it.
ここで、金属管１００の減径絞り加工［後において、感
温部位１０に位置する酸化マグネシウム粉末の充填度合
いが、他の充填部分の酸化マグネシウム粉末の充填度合
いより、やや租くできれば、各粉末の粒度を上述の値や
範囲値に限定されない。Here, the metal tube 100 is drawn to reduce its diameter [later, if the degree of filling of the magnesium oxide powder located in the temperature sensitive part 10 can be made slightly smaller than the degree of filling of magnesium oxide powder in other filling parts, each powder The granularity is not limited to the above values or range values.
６、金属管１００の開口１３０に、シリカ２０％、酸化
硼素３０％、酸化亜鉛２５％を主成分とした電気絶縁性
のガラスシール材１４０を充填し、シール材１４０をプ
レスする。なお、シール材１４０には電極線２００が貫
通状態に配設される。6. The opening 130 of the metal tube 100 is filled with an electrically insulating glass sealing material 140 whose main components are 20% silica, 30% boron oxide, and 25% zinc oxide, and the sealing material 140 is pressed. Note that the electrode wire 200 is disposed to penetrate the sealing material 140.
７、金属管１００に減径絞り加工［（１５％〜４０％径
を絞るスェージング加工）を行って前記基台７００およ
び成形バイブロ００を粉砕させる。なお、耐熱金属管１
の厚みは０．３ｍｍ〜１．０ｍｍ、内径は２．５ｍｍ〜
６．０ｍｍとなる。7. The metal tube 100 is subjected to a diameter-reducing drawing process [(swaging process to reduce the diameter by 15% to 40%) to crush the base 700 and the molded vibro 00. In addition, heat-resistant metal tube 1
The thickness is 0.3mm~1.0mm, the inner diameter is 2.5mm~
It becomes 6.0mm.
８、絞り加工の際に付着した油を取り除くために、洗浄
液に浸して洗浄（好ましくは超音波洗浄）を行う。8. In order to remove the oil that adhered during the drawing process, it is immersed in a cleaning liquid and cleaned (preferably by ultrasonic cleaning).
９、熱処理（６９０℃、３０分）を施し、シール材１４
０を溶かし、耐熱金属管１を密封すると、第１図〜第３
図に示す常開形感温スイッチＡが完成する。9. Heat treatment (690°C, 30 minutes) to seal material 14
0 is melted and the heat-resistant metal tube 1 is sealed, Figures 1 to 3 are formed.
The normally open temperature-sensitive switch A shown in the figure is completed.
常開形感温スイッチＡの効果を述べる。The effects of the normally open temperature-sensitive switch A will be described.
（あ）常開形感温スイッチＡは、第６図に示すように、
バッテリー２１と警告ランプ２２を直列接続した電気回
路に、棒状電極２と耐熱金属管１とを電気接続して使用
する。ここで、感温部位１０が所定温度になると可溶金
属線４が溶ける。この溶けた可溶金属線４は、充填密度
が粗い、感温部位１０に位置する絶縁性セラミック粉末
らを主に通って耐熱金属管１内壁１２方向に向って浸透
する。このため、電気導通路３は確実に形成され（第５
図に示す）、常開形感温スイッチＡの作動の信頼性は極
めて高い。(A) The normally open temperature-sensitive switch A is as shown in Figure 6.
A rod-shaped electrode 2 and a heat-resistant metal tube 1 are electrically connected to an electric circuit in which a battery 21 and a warning lamp 22 are connected in series. Here, when the temperature sensitive part 10 reaches a predetermined temperature, the fusible metal wire 4 melts. The melted fusible metal wire 4 penetrates toward the inner wall 12 of the heat-resistant metal tube 1 mainly through the insulating ceramic powder located in the temperature-sensitive region 10, which has a coarse packing density. Therefore, the electrical conduction path 3 is reliably formed (the fifth
(shown in the figure), the operation reliability of the normally open temperature-sensitive switch A is extremely high.
（い）基台７００、成形バイブロ００を用い、隙間１０
２に充填密度が狙い粉末５を充填し、金属管１００に１
５％〜４０％の減径絞り加工を施して常開形感温スイッ
チＡを製造している。つまり、減径絞り加工で基台７０
０、成形バイブロ００を粉砕することで感温部位１０の
絶縁性セラミック粉末ジの充填密度を他の部分より粗く
している。(i) Using base 700 and molding vibro 00, gap 10
2 is filled with powder 5 with the aim of packing density, and metal tube 100 is filled with powder 5.
Normally open temperature-sensitive switch A is manufactured by performing a drawing process to reduce the diameter by 5% to 40%. In other words, the base 70 is
0. By crushing the molded Vibro 00, the packing density of the insulating ceramic powder in the temperature sensitive part 10 is made coarser than in other parts.
このため、上述のように、作動の信頼性が極めて高い常
開形感温スイッチを容易に製造することができる。Therefore, as described above, a normally open temperature-sensitive switch with extremely high operational reliability can be easily manufactured.
本発明は、上記実施例以外につぎの実施態様を含む。The present invention includes the following embodiments in addition to the above embodiments.
ａ、ガラスシール材１４０に代えて、マグネシアを用い
ても良い。a. Instead of the glass sealing material 140, magnesia may be used.
ｂ、耐熱金属管１はむくで形成されていても良い。b. The heat-resistant metal tube 1 may be formed of solid material.
Ｃ１電極線２００と合金線４００とは平行に成形バイブ
ロ００の穴内に差し込んで製造しても良い。The C1 electrode wire 200 and the alloy wire 400 may be manufactured by inserting them into the hole of the molded vibro 00 in parallel.
ｄ、基台７００、成形バイブロ００、絶縁性セラミック
粉末５は各々異なるセラミック材料であっても良い。d, the base 700, the molded vibro 00, and the insulating ceramic powder 5 may be made of different ceramic materials.
０１合金線４００を電極線２００の上になるようにクロ
スさせても良い。The 01 alloy wire 400 may be crossed over the electrode wire 200.
１１合金線４００はパイプ状、またはコイル状にして電
極線の周り（感温部位１０）に装架しても良い。また、
合金線４００の形状は、本明細書中で挙げたものに限定
されない。The No. 11 alloy wire 400 may be formed into a pipe shape or a coil shape and may be installed around the electrode wire (temperature sensing portion 10). Also,
The shape of alloy wire 400 is not limited to those listed in this specification.
ｇ、請求項１に示す、感温部位における絶縁性セラミッ
ク粉末の充填度合いを、他の充填部分より粗くした常開
形感温スイッチを製造する際、請求項２の製造方法以外
に、基台を耐熱金属管内底に載置し、セラミック粉末を
入れ、棒状電極および可溶金属を貫装および配設した電
気絶縁性セラミックの成形柱を嵌め、金属管に減径絞り
加工を行って基台および成形柱を粉砕するという製造方
法を用いても良い。g. When manufacturing a normally open temperature-sensitive switch in which the degree of filling of the insulating ceramic powder in the temperature-sensing part is coarser than in other filling parts as shown in claim 1, in addition to the manufacturing method in claim 2, a base plate is used. placed on the inner bottom of a heat-resistant metal tube, filled with ceramic powder, fitted with an electrically insulating ceramic molded column with rod-shaped electrodes and fusible metal inserted through it, and the metal tube was drawn to reduce its diameter to form a base. Alternatively, a manufacturing method may be used in which the molded column is crushed.
第１図は本発明にがかる常開形感温スイッチの一実施例
を示す破断斜視図、第２図はそのスイッチの部分断面図
、第３図はＣ・−Ｃ線で切断した部分省略断面図、第４
図はそのスイッチの減径絞り加工を行う前の部分断面図
、第５図はそのスイッチが作動しなところを示す部分断
面図、第６図はそのスイッチの電気配線を示す説明図で
ある。
第７図は従来の常開形感温スイッヂが作動したところを
示す部分断面図である。
図中 １・・・耐熱金属管 ２・・・棒状電極 ３・・
・電気導通路 ４・・・可溶金属線（可溶金属） ５．
６．７・・・絶縁性セラミック粉末 １０・・・感温部
位 １２・・・内壁 １３．１３０・・・開口 １００
・・・金属管（耐熱金属管） １０２・・・隙間 １４
０・・・ガラスシール材 ２００・・・電極線（棒状電
極） ４００・・・銅−マンガン合金線（可溶金属）
６００・・・成形パイプ（成形柱）
感温スイッチ
７００・・・基台 Ａ・・・常開形Fig. 1 is a cutaway perspective view showing an embodiment of a normally open temperature-sensitive switch according to the present invention, Fig. 2 is a partial cross-sectional view of the switch, and Fig. 3 is a partially omitted cross-section taken along line C and -C. Figure, 4th
The figure is a partial cross-sectional view of the switch before it is drawn to reduce its diameter, FIG. 5 is a partial cross-sectional view showing the switch not operating, and FIG. 6 is an explanatory diagram showing the electrical wiring of the switch. FIG. 7 is a partial cross-sectional view showing a conventional normally open temperature-sensitive switch in operation. In the diagram: 1... Heat-resistant metal tube 2... Rod-shaped electrode 3...
・Electrical conduction path 4... Fusible metal wire (fusible metal) 5.
6.7...Insulating ceramic powder 10...Temperature sensitive part 12...Inner wall 13.130...Opening 100
... Metal pipe (heat-resistant metal pipe) 102 ... Gap 14
0... Glass sealing material 200... Electrode wire (rod-shaped electrode) 400... Copper-manganese alloy wire (fusible metal)
600... Molded pipe (molded column) Temperature-sensitive switch 700... Base A... Normally open type
Claims (1)
電極と、 前記耐熱金属管に充填される絶縁性セラミック粉末と、 前記耐熱金属管の感温部位内に配されるとともに、所定
温度で溶融して前記棒状電極と耐熱金属管との間に電気
導通路を形成する可溶金属とを備えてなる常開形感温ス
イッチにおいて、前記感温部位における前記絶縁性セラ
ミック粉末の充填度合いを、他の充填部分より粗くした
ことを特徴とする常開形感温スイッチ。 ２）電気絶縁性セラミックの基台を、先端閉塞の耐熱金
属管内底に載置し、 続いて、棒状電極および所定温度で溶融する可溶金属を
先端面より露出状態に、貫装および配設した電気絶縁性
セラミックの成形柱を遊嵌し、前記耐熱金属管内の各隙
間にセラミック粉末を充填し、 前記耐熱金属管に減径絞り加工を行つて前記基台および
成形柱を粉砕し、 前記耐熱金属管の開口を電気絶縁性のガラスシール材で
塞ぐとともに、このガラスシール材に前記棒状電極を貫
通状態に配設し てなる常開形感温スイッチの製造方法。[Scope of Claims] 1) A heat-resistant metal tube with a closed end, a rod-shaped electrode that is inserted and arranged to be electrically insulated from the heat-resistant metal tube, and an insulating ceramic powder filled in the heat-resistant metal tube. A normally open shape comprising a fusible metal disposed within the temperature-sensitive portion of the heat-resistant metal tube and melted at a predetermined temperature to form an electrically conductive path between the rod-shaped electrode and the heat-resistant metal tube. 1. A normally open temperature-sensitive switch, characterized in that the degree of filling of the insulating ceramic powder in the temperature-sensing portion is made coarser than in other filling portions. 2) An electrically insulating ceramic base is placed on the inner bottom of a heat-resistant metal tube with a closed end, and then a rod-shaped electrode and a fusible metal that melts at a predetermined temperature are penetrated and placed in an exposed state from the end surface. loosely fit a molded pillar made of electrically insulating ceramic, fill each gap in the heat-resistant metal tube with ceramic powder, perform a diameter-reducing drawing process on the heat-resistant metal tube to crush the base and molded pillar, and crush the base and molded pillar. A method for manufacturing a normally open temperature-sensitive switch, which comprises closing an opening of a heat-resistant metal tube with an electrically insulating glass sealing material, and arranging the rod-shaped electrode to penetrate the glass sealing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26090089A JP2665004B2 (en) | 1989-10-05 | 1989-10-05 | Normally-open temperature-sensitive switch and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26090089A JP2665004B2 (en) | 1989-10-05 | 1989-10-05 | Normally-open temperature-sensitive switch and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03122935A true JPH03122935A (en) | 1991-05-24 |
| JP2665004B2 JP2665004B2 (en) | 1997-10-22 |
Family
ID=17354319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26090089A Expired - Fee Related JP2665004B2 (en) | 1989-10-05 | 1989-10-05 | Normally-open temperature-sensitive switch and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2665004B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011080751A (en) * | 2009-10-02 | 2011-04-21 | Robert Bosch Gmbh | Method for manufacturing glow plug |
-
1989
- 1989-10-05 JP JP26090089A patent/JP2665004B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011080751A (en) * | 2009-10-02 | 2011-04-21 | Robert Bosch Gmbh | Method for manufacturing glow plug |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2665004B2 (en) | 1997-10-22 |
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