JPH01137585A - Coupling structure between ceramic heater and metal member - Google Patents
Coupling structure between ceramic heater and metal memberInfo
- Publication number
- JPH01137585A JPH01137585A JP29583687A JP29583687A JPH01137585A JP H01137585 A JPH01137585 A JP H01137585A JP 29583687 A JP29583687 A JP 29583687A JP 29583687 A JP29583687 A JP 29583687A JP H01137585 A JPH01137585 A JP H01137585A
- Authority
- JP
- Japan
- Prior art keywords
- sintered body
- ceramic
- ceramic sintered
- conductor
- fitting
- 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.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 110
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 30
- 239000002184 metal Substances 0.000 title claims abstract description 30
- 230000008878 coupling Effects 0.000 title abstract 2
- 238000010168 coupling process Methods 0.000 title abstract 2
- 238000005859 coupling reaction Methods 0.000 title abstract 2
- 239000004020 conductor Substances 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 33
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 241000219112 Cucumis Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、セラミックヒータと金属部材との嵌合構造に
関し、とくに重両用内燃機関のシリンダーヘッドに取付
（）られるセラミツフグ［１−プラグに好適なセラミッ
クヒータと金属部材との嵌合構造にかかわる、。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a fitting structure between a ceramic heater and a metal member, and is particularly suitable for a ceramic plug [1-plug] attached to a cylinder head of a dual-purpose internal combustion engine. This is related to the fitting structure between a ceramic heater and a metal member.
（従来の技術１
内燃機関とくにデイ−げルートンジンには、周知のよう
に始動補助装置としてセラミックグロープラグが採用さ
れている１、セラミックグロープラグ１００は、従来よ
り、第８図に示すごとく、自動中用デイ−ビルエンジン
のシリンダーヘッドに取イ４けられる中空の取付金具１
１０内に挿入された電気絶縁性のセラミック焼結体１２
０内に発熱抵抗線１３０および該発熱抵抗線１３０の端
子１４０を埋設してなるセラミックヒータ１５０と、セ
ラミック焼結体１２０に外嵌されると共に、発熱抵抗線
１３０と取付金具１１０とを接続する保持金具１６０と
からなり、嵌合面に露出された端子１４０の露出部１４
１と保持金具１６０とがろう何けされてなる。(Prior art 1) As is well known, ceramic glow plugs are used as starting aids in internal combustion engines, especially diesel engine engines. Hollow mounting bracket 1 that can be installed on the cylinder head of a medium duty engine
Electrically insulating ceramic sintered body 12 inserted into 10
A ceramic heater 150 is formed by embedding a heat generating resistance wire 130 and a terminal 140 of the heat generating resistance wire 130 in the ceramic heater 150 and is fitted onto the ceramic sintered body 120 and connects the heat generating resistance wire 130 and the mounting bracket 110. The exposed portion 14 of the terminal 140 is made up of a holding fitting 160 and is exposed to the fitting surface.
1 and the holding fitting 160 are soldered together.
［発明が解決しようとする問題点１
しかるに、上記構成のセラミックグロープラグ１００に
おいては、このセラミックグロープラグ１００が熱履歴
を受けるたびに、取付金具１１０および保持金員１６０
とセラミック焼結体１２０との熱膨張係数の差により生
ずる応力によって、保持金具１６０に端子１４０の露出
部１４１が矢印り向に引張られるため、端子１４０の露
出部１４１の近傍で断線等の不具合を発生し易いという
問題点があった。[Problem to be Solved by the Invention 1] However, in the ceramic glow plug 100 having the above configuration, each time the ceramic glow plug 100 is subjected to thermal history, the mounting fitting 110 and the retaining metal 160 are damaged.
The exposed portion 141 of the terminal 140 is pulled in the direction of the arrow by the holding fitting 160 due to stress caused by the difference in thermal expansion coefficient between the holder 160 and the ceramic sintered body 120, resulting in problems such as wire breakage near the exposed portion 141 of the terminal 140. There was a problem in that it was easy for this to occur.
本発明は、導電体の喘Ｐの断線などの不具合を防止する
セラミックヒータと金属部材との嵌合構造の１ν供を［
］的とする。The present invention provides a 1v fitting structure between a ceramic heater and a metal member that prevents problems such as disconnection of the conductor P.
] target.
Ｌ問題点を解決するためのｆ段］
本発明のヒラミックヒータと金属部材との嵌合溝Ｊ２ｉ
は、電気絶縁性のピラミック焼結体内に導電体を狸没し
てなるセラミックヒータと、前記焼結体に外嵌されると
共に、前記導電体への接続端子を兼ねた保持金具とから
なり、嵌合面に露出された前記４電体の端Ｔと前記保持
金員とがろう付けされてなるヒラミックヒータと金属部
材との嵌合構造において、前記導電体の端子の露出部は
、その両端が前記セラミック焼結体内に埋設されている
構成を採用した。f stage for solving the L problem] Fitting groove J2i between the heramic heater of the present invention and a metal member
consists of a ceramic heater formed by sinking a conductor into an electrically insulating pyramidal sintered body, and a holding fitting that is fitted onto the sintered body and also serves as a connection terminal to the conductor, In a fitting structure between a helical heater and a metal member in which the ends T of the four electric conductors exposed on the fitting surface are brazed to the holding member, the exposed portions of the terminals of the conductors are A configuration was adopted in which both ends were buried within the ceramic sintered body.
［竹田］
本発明のセラミックヒータと金属部材との嵌合構造は上
記構成によりつぎのｎ用を有する。[Takeda] The fitting structure between the ceramic heater and the metal member of the present invention has the following n function due to the above configuration.
ＩＦ電休体喘ｆの露出部が断線不良を生起する原因は、
熱履歴を受けるたびに、Ｓ電体への接続端子を兼ねた保
持金具とセラミック焼結体との熱膨張係数の差により生
ずる応力によって、導電体の端Ｆの露出部が引張られ、
断線に至るものであつた。そこで、断線を防止するため
に、保持金具とセラミック焼結体との熱膨張係数の差に
より生ずる応力に耐え得るように、導電体の端子とセラ
ミック焼結体との固着力を向上する必要がある。このた
め、導電体の端子の露出部の両端をセラミック焼結体に
埋設することによって、導電体の端子とセラミック焼結
体との固着力を向上させ、セラミックヒータと金属部材
との嵌合構造が熱履歴を受ける際、取イ・１金具に導電
体の端Ｐの露出部が引張られ、断線に芋ることを防止す
ることが可能となる。。The cause of disconnection failure in the exposed part of the IF wire is as follows:
Every time it undergoes thermal history, the exposed portion of the end F of the conductor is pulled due to stress caused by the difference in thermal expansion coefficient between the holding metal fitting, which also serves as a connection terminal to the S electric body, and the ceramic sintered body.
This led to a disconnection. Therefore, in order to prevent wire breakage, it is necessary to improve the adhesion strength between the conductor terminal and the ceramic sintered body in order to withstand the stress caused by the difference in thermal expansion coefficient between the holding fitting and the ceramic sintered body. be. Therefore, by embedding both ends of the exposed portion of the conductor terminal in the ceramic sintered body, the adhesion force between the conductor terminal and the ceramic sintered body is improved, and the fitting structure between the ceramic heater and the metal member is improved. When subjected to thermal history, the exposed portion of the end P of the conductor is pulled by the handle A-1 metal fitting, making it possible to prevent wire breakage. .
［発明の効果１
本発明のセラミックヒータと金属部材との嵌合構造は上
記構成および信用によりつぎの効果を奏する。[Effect of the Invention 1] The fitting structure between the ceramic heater and the metal member of the present invention has the following effects due to the above configuration and reliability.
導電体の喘ｆの露出部の両端をセラミック焼結体に埋設
することによって、熱履歴を受けるたびに、取付金具に
導電体の喘ｆの露出部が引張られることを防止できるの
で、導電体の端子の露出部の断ＦＡなどの不具合を防止
することができる、。By burying both ends of the exposed part of the conductor in the ceramic sintered body, it is possible to prevent the exposed part of the conductor from being pulled by the mounting bracket whenever it is subjected to thermal history. It is possible to prevent problems such as disconnection of the exposed part of the terminal.
［実施例］
本発明のセラミックヒータと金属部Ｈとの嵌合構造の実
施例を第１図ないし第７図に基づき説明する。 第１図
は本発明の第１実施例を適用した内燃開開とくにデイ−
ビルエンジンの始り１補助装麿であるセラミックグロー
プラグを示し、第２図はそのセラミックヒータを示す。[Example] An example of a fitting structure between a ceramic heater and a metal part H according to the present invention will be described with reference to FIGS. 1 to 7. FIG. 1 shows an example of an internal combustion engine, particularly a day engine, to which the first embodiment of the present invention is applied.
A ceramic glow plug, which is the first auxiliary equipment of a building engine, is shown, and FIG. 2 shows its ceramic heater.
１はセラミックグロープラグを丞す。1 carries a ceramic glow plug.
２は外周に数句ねじ２１および六角状の頭部２２が形成
され、デーｒ −１ｉル１ンジンのシリンダーヘッドに
取付けられる中空の取付金Ａを示し、Ａは取イ」金！：
Ｊ２の−・方側の中心に挿入されたセラミックヒータを
示し、３は取付金具２の使方側の中心に挿入され、外周
に雄ねじ３１が形成された棒状中心電極を示す。2 shows a hollow mounting bracket A which has several screws 21 and a hexagonal head 22 formed on its outer periphery and is attached to the cylinder head of a Dale-1 engine. :
A ceramic heater is shown inserted into the center of the -- side of J2, and 3 is a rod-shaped center electrode inserted into the center of the usage side of the mounting bracket 2 and has a male thread 31 formed on its outer periphery.
このセラミックヒータＡは、取付金具２から先端部４１
が突出するように基部４２が取付金具２の中心に挿入さ
れた電気絶縁性の棒状セラミック焼結体４と、該廿ラミ
ック焼結体４に外嵌される保持金具８とを備える。。This ceramic heater A is connected from the mounting bracket 2 to the tip 41.
The base 42 is provided with an electrically insulating rod-shaped ceramic sintered body 4 inserted into the center of the mounting fitting 2 so as to protrude, and a holding fitting 8 fitted onto the outside of the ceramic sintered body 4. .
セラミック焼結体４の先端部４１には、Ｓ電体であるコ
イル状発熱抵抗線５が略Ｕ字型に埋設され、基部４２に
は、陽電極取出線６および導電体の端ｆである陰電極取
出線γが埋設されている。A coiled heating resistance wire 5, which is an S electric body, is buried in a substantially U-shape in the tip 41 of the ceramic sintered body 4, and a positive electrode lead wire 6 and an end f of the conductor are buried in the base 42. A negative electrode lead line γ is buried.
陽電極取出線６は、一方がわにセラミック焼結体４の基
部４２の端部４３で露出すると共に中心電極３に接続さ
れる露出部６１を有し、他方がわに発熱抵抗線５の端部
５１に接続されると共にセラミック焼結体４に埋設され
る埋設部６２を有する。露出部６１は、ニッケルメツ都
が施され、さらにリード線６３を銀ろう付けし、これを
介してセラミックグロープラグ１の中心電極３に接続さ
れている。The positive electrode lead wire 6 has an exposed portion 61 exposed at the end 43 of the base 42 of the ceramic sintered body 4 on one side and connected to the center electrode 3, and has an exposed portion 61 connected to the center electrode 3 on the other side. It has an embedded part 62 connected to the end part 51 and embedded in the ceramic sintered body 4 . The exposed portion 61 is coated with nickel metal and is connected to the center electrode 3 of the ceramic glow plug 1 through a lead wire 63 soldered with silver.
陰電極取出線７は、一方がわにセラミック焼結体４の基
部４２の保持金具８との嵌合面４４で露出する露出部７
１を有し、他方がわに発熱抵抗線５の端部５２に接続さ
れると共にセラミック焼結体４に埋設される埋設部７２
を有する。The negative electrode lead wire 7 has an exposed portion 7 exposed on one side at a fitting surface 44 of the base 42 of the ceramic sintered body 4 with the holding fitting 8.
1, the other side is connected to the end 52 of the heat generating resistance wire 5, and the buried part 72 is buried in the ceramic sintered body 4.
has.
露出部７１は、くの字型に折曲げられ、その先端１３、
および他端７４をセラミック焼結体４内にＪ！Ｊ段する
ことによってセラミック焼結体４との固着力を向」−さ
けている。陰電極取出線７は、露出部７１にニッケルメ
ツＥ ／Ｊ＜ ｍされている。The exposed portion 71 is bent into a dogleg shape, and the tip 13,
and the other end 74 into the ceramic sintered body 4! The adhesion force with the ceramic sintered body 4 is improved by forming the J-stage. The negative electrode lead wire 7 is formed in the exposed portion 71 with a nickel metal wire E/J<m.
保持金具８４．Ｌ、セラミック焼結体４に外嵌されると
」（に、陰電極取出線７への接続端子をＡねており、こ
の保持金具８とＩ１２電極取出線１の露出部１１とｔｉ
銀ろう付けされている。Holding metal fittings 84. L, when it is fitted onto the ceramic sintered body 4, the connection terminal to the negative electrode lead wire 7 is connected to the holding fitting 8, the exposed part 11 of the I12 electrode lead wire 1, and the ti
Silver soldered.
本実施例のセラミックグロープラグ１の製）貴方法は、
例えば窒化硅素（Ｓｉ３Ｎａ＞質のセラミック素地粉末
中に、例えばタンゲステン系のコイル状の発熱抵ＩＡｆ
１５、陽電極取出線６および陰電極取出線７をプレス成
型によって、埋設する。これをホットプレス焼成して、
略円柱状のセラミック焼結体４を製造する。つぎにセラ
ミック焼結体４の保持金具８との１択合而４４を研磨し
て、所定形状の棒状に成型し、セラミック焼結体４中に
埋設された陽′Ｆ１８ｉ取出線６および陰電極取出線７
を露出させ、これらの露出部６１．７１にニッケルメツ
↑を施した上、陰電極取出線γの露出部１１と保持金具
８とを銀ろう付げにより接合する。そして、中心電極３
を溶接した後、取付金具２内にセラミック焼結体４およ
び保持金具８を挿入して、取付金具２と保持金具８とを
ろう伺げにより接合してセラミックグロープラグ１を製
造する。The manufacturing method of the ceramic glow plug 1 of this example is as follows:
For example, a tungsten-based coil-shaped heating resistor IAf is placed in a ceramic base powder of silicon nitride (Si3Na).
15. The positive electrode lead wire 6 and the negative electrode lead wire 7 are buried by press molding. Hot press fire this,
A substantially cylindrical ceramic sintered body 4 is manufactured. Next, the joint 44 of the ceramic sintered body 4 with the holding fitting 8 is polished and formed into a rod shape of a predetermined shape, and the positive F18i lead wire 6 and the negative electrode embedded in the ceramic sintered body 4 are polished. Take-out line 7
After exposing these exposed parts 61 and 71 with nickel metal ↑, the exposed part 11 of the negative electrode lead wire γ and the holding fitting 8 are joined by silver brazing. And the center electrode 3
After welding, the ceramic sintered body 4 and the holding fitting 8 are inserted into the fitting 2, and the fitting 2 and the holding fitting 8 are joined by soldering to manufacture the ceramic glow plug 1.
本実施例のセラミックグロープラグ１の作用を図に基づ
き説明する。The function of the ceramic glow plug 1 of this embodiment will be explained based on the drawings.
陰′Ｆｉ極取出線７の露出部１１が断線不良を生起する
原因は、セラミックグロープラグ１が熱履歴を受けるた
びに、セラミック焼結体４を保持し、デイ−ピル１ンジ
ンのシリンダーヘッドに取付けるための取付金具２とセ
ラミック焼結体４との熱部脹係数の差により生ｆる応力
によって、陰電極取出線７の露出部７１が引張られ、露
出部７１の近傍で中電極取出線が断線に至るものであっ
た。The reason why the exposed part 11 of the negative Fi electrode lead wire 7 is disconnected is that every time the ceramic glow plug 1 undergoes thermal history, the ceramic sintered body 4 is held and The exposed portion 71 of the negative electrode lead wire 7 is pulled due to the stress caused by the difference in thermal expansion coefficient between the mounting bracket 2 for mounting and the ceramic sintered body 4, and the middle electrode lead wire is pulled in the vicinity of the exposed portion 71. This led to a disconnection.
そこで、断線を防止するために、取付金具２とセラミッ
ク焼結体４との熱部慝係数の差により生ずる応力に耐え
得るように、陰電極取出線ｌとセラミック焼結体４との
固着力を向上するため、陰電極取出線７の露出部７１の
先端７３をくの字型に折曲げて、露出部７１の両端７３
．７４をセラミック焼結体４内に埋設することによって
、陰電極取出線７とセラミック焼結体４どの固着力を向
トさせることにより、取１４金具２とけラミック焼結体
４との熱部１瓜係数のＺによりイ１−ヂる応）ｊに耐え
ることができる。Therefore, in order to prevent wire breakage, the adhesion force between the cathode lead wire l and the ceramic sintered body 4 is made so as to withstand the stress caused by the difference in the hot part coefficient between the mounting bracket 2 and the ceramic sintered body 4. In order to improve the
．． By embedding 74 in the ceramic sintered body 4, the adhesion force between the negative electrode lead wire 7 and the ceramic sintered body 4 is directed, and the hot part 1 between the metal fitting 2 and the ceramic sintered body 4 is Due to the melon coefficient Z, it is possible to withstand 1-dir response)j.
したがって、本実施例では、発熱抵抗線５および陰電極
取出線７の両端１３．７４が共に常時セラミック焼結体
４内に埋設されているので、断線秀の不具合の発生を防
止できる。Therefore, in this embodiment, since both ends 13.74 of the heat generating resistance wire 5 and the negative electrode lead wire 7 are always buried in the ceramic sintered body 4, the occurrence of the problem of wire breakage can be prevented.
ここで、陰電極取出線７の露出部７１の両端７３、ｔ４
の折曲げ形状は、任意であるが、セラミック焼結体４の
大きざがφ３．５ａ＋ａ＋ Ｘ Ｊ！ ４０で、陰電極
取出ｌＱ７がφ０．３．の場合には、セラミック焼結体
４に埋設される先端７３の長さは、０．！１ｎｙ−３，
０ｍｍ、先端７３の埋設深さは、０．０５ａｎ以上とす
ることが耐久竹上好ましい。Here, both ends 73 of the exposed portion 71 of the negative electrode lead line 7, t4
The bending shape is arbitrary, but the size of the ceramic sintered body 4 is φ3.5a+a+X J! 40, and the negative electrode lead lQ7 is φ0.3. In this case, the length of the tip 73 embedded in the ceramic sintered body 4 is 0. ! 1ny-3,
0 mm, and the buried depth of the tip 73 is preferably 0.05 an or more for durability.
ざらに、本出願人は、本実施例のセラミックグロープラ
グ１（ｘｌＯＯ本）と従来ＩＡ 造のセラミックグロー
プラグ（ｘ１００本）とを１分間の通電による加熱によ
り１２５０℃まで１１１渇し、１分間の非通電による冷
却により降温を繰り返す熱勺イクル耐久テストを実施し
た。Roughly speaking, the present applicant heated the ceramic glow plugs 1 (xlOO pieces) of this embodiment and the conventional IA ceramic glow plugs (x100 pieces) to 1250°C by heating them with electricity for 1 minute. A thermal cycle durability test was conducted in which the temperature was repeatedly lowered by cooling without electricity being applied.
その結果、ノ１常に苛酷な条件下での耐久テストのため
、従来の構造のセラミックグロープラグは、１００００
回の熱サイクルで１００木中２本の電極取出線の断線が
発生した。本実施例のセラミックグロープラグ１は、１
００００回の熱サイクルまで１００本全て何ら不具合が
牛１．；なかった。As a result, ceramic glow plugs with conventional structure have been tested for durability under harsh conditions.
Two of the 100 wood electrode lead wires broke during the heat cycle. The ceramic glow plug 1 of this embodiment has 1
All 100 bottles had no problems until 0,000 heat cycles.1. ;There wasn't.
第３図は本発明のセラミックヒータと金属部材との嵌合
構造の第２実施例を適用したセラミックヒータを丞す。FIG. 3 shows a ceramic heater to which a second embodiment of the fitting structure between a ceramic heater and a metal member of the present invention is applied.
（第１実施例と同−目能物は同番号を（Ｊす）本実施例
では、陰電極取出線７の露出部７１を一箇所のみくの字
型の折曲げてセラミック焼結体４内に露出部７１の両端
７３．７４を埋設し、研磨することによって、セラミッ
ク焼結体４と而−にしている。(The same numbers as those in the first embodiment are designated by the same numbers (J).) In this embodiment, the exposed portion 71 of the cathode lead wire 7 is bent in a dogleg shape at one point to form a ceramic sintered body 4. Both ends 73 and 74 of the exposed portion 71 are buried inside and polished to form the ceramic sintered body 4.
第４図は本発明のセラミックヒータと金属部材との嵌合
構造の第３実施例を適用したセラミックヒータを承す１
゜
（第１実施例と同−機能物は同番岡を付す）本実施例で
は、陰電極取出線７の露出部７１の先端を角を付けて１
ｈ曲げると陰電極取出線７の材質にタンゲス１ンを用い
た場合は歪みが生ずるので、陰電極取出線７の露出部７
１の先端７３を円弧状に形成し、セラミック焼結体４内
に露出部７１の両端７３．７４をｌ’Ｊ設している。FIG. 4 shows a ceramic heater according to a third embodiment of the fitting structure between a ceramic heater and a metal member according to the present invention.
゜(Same as the first embodiment - Functional objects are marked with the same numbers) In this embodiment, the tip of the exposed portion 71 of the cathode lead wire 7 is rounded.
If the cathode lead wire 7 is made of Tanges 1, the exposed portion 7 of the cathode lead wire 7 will be bent.
The tip 73 of the exposed portion 71 is formed into an arc shape, and both ends 73 and 74 of the exposed portion 71 are provided within the ceramic sintered body 4.
第５図は本発明のヒラミックヒータと金属部材との１■
合購造の第４実施例を適用したセラミックヒータを示す
、。Figure 5 shows 1.
This shows a ceramic heater to which a fourth embodiment of combined manufacturing is applied.
（第１実施例と同−機能物は同番号を付す）本実施例で
は、陰電極取出線７の露出部７１の先端７３を折返して
、鉤状に形成し、セラミック焼結体４内に露出部７１の
両端７３．１４を埋設している。(Same as in the first embodiment - the same functional parts are given the same numbers) In this embodiment, the tip 73 of the exposed portion 71 of the negative electrode lead wire 7 is folded back to form a hook shape, and is inserted into the ceramic sintered body 4. Both ends 73.14 of the exposed portion 71 are buried.
第６図は本発明のセラミックヒータと金属部材との嵌合
構造の第５実施例を適用したセラミックヒータを示す。FIG. 6 shows a ceramic heater to which a fifth embodiment of the fitting structure between a ceramic heater and a metal member of the present invention is applied.
（第１実施例と同−機能物は同番号を付す）本実施例で
は、陰電極取出線γの露出部７１の折曲げを三箇所で（
ｊい、セラミック焼結体４内に露出部７１の両端１３．
１４および中央１５を埋設することによって露出面７１
ａ、７ｔｈを三箇所にして、陰電極取出線７と取付金具
２との電気的接続をより確実に行う。(The same functional parts as in the first embodiment are given the same numbers.) In this embodiment, the exposed portion 71 of the cathode lead wire γ is bent at three locations (
Both ends 13 of the exposed portion 71 are formed within the ceramic sintered body 4.
14 and the center 15 by burying the exposed surface 71
The electrical connection between the cathode lead wire 7 and the mounting bracket 2 is made more secure by using three locations a and 7th.
第７図は本発明のセラミックヒータと金属部材との嵌合
構造の第６実施例を適用したセラミックヒータを示す、
。FIG. 7 shows a ceramic heater to which a sixth embodiment of the fitting structure between a ceramic heater and a metal member of the present invention is applied.
.
（第１実施例と同−機能物は同番号を付す）本実施例で
は、陰電極取出線７の露出部７１をコイル状に形成して
、セラミック焼結体４内に露出部７１の両端７３．７４
および中間７６．７１を埋設することによって陰電極取
出線１とセラミック焼結体４との固着力を向上させてい
る。(The same numbers as in the first embodiment are given to functional objects.) In this embodiment, the exposed portion 71 of the negative electrode lead wire 7 is formed into a coil shape, and both ends of the exposed portion 71 are placed inside the ceramic sintered body 4. 73.74
By burying the intermediate portions 76 and 71, the adhesion force between the negative electrode lead wire 1 and the ceramic sintered body 4 is improved.
［他の実施例］
本実施例で（ま、陰電極取出線７のみ本発明を採用して
いる。この叩出は、一般に陽電極取出線６がリード線６
３を介して中心電極３に接続されているため、中心電極
３とセラミック焼結体４との熱１ｍ＋１係数の差により
住ｆる応ツノが小さく、断線等の不見合が生じ難いから
である。この陽電極取出線６の露出部６１の先端をセラ
ミック焼結体４内にＪ！ｌ！設した場合にＩＬ陽雷極取
出線６の信頼性が向上することは言うまでｔ）すい。[Other Embodiments] In this embodiment, only the negative electrode lead wire 7 adopts the present invention. In general, the positive electrode lead wire 6 is
3, the difference in thermal coefficient of 1m+1 between the center electrode 3 and the ceramic sintered body 4 causes a small response angle, and it is difficult for discrepancies such as wire breakage to occur. . The tip of the exposed portion 61 of this anode lead wire 6 is inserted into the ceramic sintered body 4. l! It goes without saying that the reliability of the IL positive lightning pole lead-out line 6 is improved when the IL positive lightning pole lead-out line 6 is provided.
本実施例では、陰電極取出線と取付金具との間に筒状保
持金具を介在させて電気的に接続したが、陰電極取出線
と取ト１金具との間に円弧状などの保持金具を介在させ
て電気的に接続してら良く、保持金具と取付金具とを一
体的に構成してら良い。In this example, a cylindrical holding metal fitting was interposed between the cathode lead wire and the mounting bracket for electrical connection, but an arc-shaped holding metal fitting, etc. The holding fitting and the mounting fitting may be integrally configured.
本発明は、上述した第１〜第６実施例に限定されるもの
ではなく、あるいはセラミックグロープラグに限定され
るものではなく、形状、材質、用途など本発明を逸脱し
ない範囲内で種々変更できる。The present invention is not limited to the above-mentioned first to sixth embodiments, nor is it limited to ceramic glow plugs, and various changes in shape, material, use, etc. can be made without departing from the scope of the present invention. .
第１図は本発明の第１実施例を適用したセラミックグロ
ープラグを示す断面図、第２図は本発明の第１実施例の
セラミックヒータのに部を示す断面図、第３図は本発明
の第２実施例のセラミックヒータの要部を示す断面図、
第４図は本発明の第３実施例のセラミックヒータの要部
を示す断面図、第５図は本発明の第４実施例のセラミッ
クヒータの要部を示す断面図、第６図は本発明の第５実
施例のセラミックヒータの要部を示す断面図、第７図は
本発明の第６実施例のセラミックヒータの要部を示す断
面図、第８図は従来のセラミックグロープラグを示す断
面図である。
図中
Ａ・・・セラミックヒータ １・・・セラミックグロ
ープラグ ２・・・取付金具 ３・・・中心電極 ４・
・・セラミック焼結体 ５・・・発熱抵抗線（導電体）
６・・・陽電極取出線 ７・・・陰電極取出線 ８
・・・保持金具６１．７１・・・露出部FIG. 1 is a cross-sectional view showing a ceramic glow plug to which a first embodiment of the present invention is applied, FIG. 2 is a cross-sectional view showing a ceramic heater according to a first embodiment of the present invention, and FIG. A sectional view showing the main parts of the ceramic heater of the second embodiment,
FIG. 4 is a cross-sectional view showing the main parts of a ceramic heater according to a third embodiment of the present invention, FIG. 5 is a cross-sectional view showing main parts of a ceramic heater according to a fourth embodiment of the present invention, and FIG. 7 is a cross-sectional view showing the main parts of a ceramic heater according to the fifth embodiment of the present invention, FIG. 8 is a cross-sectional view showing the main parts of a ceramic heater according to the sixth embodiment of the present invention, and FIG. 8 is a cross-sectional view showing a conventional ceramic glow plug. It is a diagram. A in the diagram: Ceramic heater 1: Ceramic glow plug 2: Mounting bracket 3: Center electrode 4:
...Ceramic sintered body 5...Heating resistance wire (conductor)
6... Positive electrode lead wire 7... Negative electrode lead wire 8
...Holding metal fitting 61.71...Exposed part
Claims (1)
てなるセラミックヒータと、 前記焼結体に外嵌されると共に、前記導電体への接続端
子を兼ねた保持金具とからなり、嵌合面に露出された前
記導電体の端子と前記保持金具とがろう付けされてなる
セラミックヒータと金属部材との嵌合構造において、 前記導電体の端子の露出部は、その両端が前記セラミッ
ク焼結体内に埋設されていることを特徴とするセラミッ
クヒータと金属部材との嵌合構造。 ２）前記導電体は、セラミックグロープラグの中空の取
付金具内に前記保持金具を介して挿入された棒状セラミ
ック焼結体の先端部に埋設された発熱抵抗線であること
を特徴とする特許請求の範囲第１項に記載のセラミック
ヒータと金属部材との嵌合構造。 ３）前記端子は、一端が前記発熱抵抗線に接続され、他
端が前記セラミック焼結体の中間部の外周より露出し、
該露出部で前記保持金具に接続された陰電極取出線であ
ることを特徴とする特許請求の範囲第２項に記載のセラ
ミックヒータと金属部材との嵌合構造。[Scope of Claims] 1) A ceramic heater formed by embedding a conductor in an electrically insulating ceramic sintered body, and a holder that is fitted onto the sintered body and also serves as a connection terminal to the conductor. In the fitting structure of a ceramic heater and a metal member, the terminal of the conductor exposed on the fitting surface and the holding fitting are brazed to each other, wherein the exposed portion of the terminal of the conductor is A fitting structure between a ceramic heater and a metal member, wherein both ends thereof are embedded in the ceramic sintered body. 2) A patent claim characterized in that the conductor is a heat-generating resistance wire embedded in the tip of a rod-shaped ceramic sintered body inserted into a hollow fitting of a ceramic glow plug via the holding fitting. A fitting structure between the ceramic heater and a metal member according to item 1. 3) One end of the terminal is connected to the heating resistance wire, and the other end is exposed from the outer periphery of the intermediate portion of the ceramic sintered body,
3. The fitting structure of a ceramic heater and a metal member according to claim 2, wherein the exposed portion is a negative electrode lead wire connected to the holding fitting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29583687A JPH01137585A (en) | 1987-11-24 | 1987-11-24 | Coupling structure between ceramic heater and metal member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29583687A JPH01137585A (en) | 1987-11-24 | 1987-11-24 | Coupling structure between ceramic heater and metal member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01137585A true JPH01137585A (en) | 1989-05-30 |
Family
ID=17825811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29583687A Pending JPH01137585A (en) | 1987-11-24 | 1987-11-24 | Coupling structure between ceramic heater and metal member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01137585A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6013898A (en) * | 1996-11-19 | 2000-01-11 | Ngk Spark Plug Co., Ltd. | Ceramic heater for a glow plug having tungsten electrode wires with metal coating |
| JPWO2005117492A1 (en) * | 2004-05-27 | 2008-04-03 | 京セラ株式会社 | Ceramic heater and glow plug using the same |
| WO2012118100A1 (en) * | 2011-02-28 | 2012-09-07 | 京セラ株式会社 | Heater and glow-plug provided therewith |
-
1987
- 1987-11-24 JP JP29583687A patent/JPH01137585A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6013898A (en) * | 1996-11-19 | 2000-01-11 | Ngk Spark Plug Co., Ltd. | Ceramic heater for a glow plug having tungsten electrode wires with metal coating |
| JPWO2005117492A1 (en) * | 2004-05-27 | 2008-04-03 | 京セラ株式会社 | Ceramic heater and glow plug using the same |
| US7935912B2 (en) | 2004-05-27 | 2011-05-03 | Kyocera Corporation | Ceramic heater, and glow plug using the same |
| WO2012118100A1 (en) * | 2011-02-28 | 2012-09-07 | 京セラ株式会社 | Heater and glow-plug provided therewith |
| JP5642260B2 (en) * | 2011-02-28 | 2014-12-17 | 京セラ株式会社 | Heater and glow plug equipped with the same |
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