WO2019003777A1 - Heater - Google Patents
Heater Download PDFInfo
- Publication number
- WO2019003777A1 WO2019003777A1 PCT/JP2018/020787 JP2018020787W WO2019003777A1 WO 2019003777 A1 WO2019003777 A1 WO 2019003777A1 JP 2018020787 W JP2018020787 W JP 2018020787W WO 2019003777 A1 WO2019003777 A1 WO 2019003777A1
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- WO
- WIPO (PCT)
- Prior art keywords
- ceramic body
- metal cap
- continuous
- heater
- internal diameter
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
Definitions
- the present disclosure relates to a heater used for various sensors or measurement devices such as, for example, a combustion-type on-vehicle heating device, an oil fan heater, a glow plug of an automobile engine, and an oxygen sensor.
- a combustion-type on-vehicle heating device such as, for example, a combustion-type on-vehicle heating device, an oil fan heater, a glow plug of an automobile engine, and an oxygen sensor.
- Patent Document 1 a heater described in Japanese Unexamined Patent Publication No. 2015-125947 (hereinafter referred to as Patent Document 1) is known.
- the heater described in Patent Document 1 is located inside a metal outer cylinder, a rod-like ceramic body in which a heating resistor is embedded, a metal outer cylinder attached so as to surround one end side of the ceramic body, and And an electrode fitting attached to one end of the ceramic body.
- the portion of the ceramic body to which the electrode fitting is attached is tapered.
- the electrode fitting is electrically connected to the heat generating resistor and plays the role of an electrode. Further, the electrode fitting is held apart from the inner circumferential surface of the metal outer cylinder.
- the heater according to one aspect of the present disclosure is a rod-like member, which has a front end and a rear end in the longitudinal direction, and a ceramic body having a taper at the rear end, and is embedded in the ceramic body A heat generating resistor whose one end is pulled out to the taper portion, a metal cap provided on the taper portion and electrically connected to the heat generation resistor, an outer peripheral surface of the ceramic body, and A tubular metal fitting attached to the ceramic body apart from the metal cap is provided to cover a metal cap, and the cylindrical metal fitting has an inner peripheral surface fixed to the outer peripheral surface of the ceramic body A first portion and a second portion continuous with the first portion, having a larger inner diameter than the first portion, and covering the metal cap.
- FIG. 1 is a cross-sectional view showing a heater 10 according to an example of the present disclosure.
- the heater 10 includes a rod-shaped ceramic body 1, a heating resistor 2 embedded in the ceramic body 1, a metal cap 3 provided at the rear end of the ceramic body 1, and the ceramic body 1. And a cylindrical metal fitting 4 provided to cover the outer peripheral surface of the housing.
- the ceramic body 1 is a member for protecting the heating resistor 2.
- the ceramic body 1 is, for example, a rod-like member having a cylindrical or prismatic shape.
- the ceramic body 1 has a front end and a rear end in the longitudinal direction.
- the ceramic body 1 includes, for example, a ceramic such as an oxide ceramic, a nitride ceramic, or a carbide ceramic.
- the dimensions of the ceramic body 1 can be, for example, 20 to 50 mm in length and 2.5 to 5 mm in diameter when the ceramic body 1 is cylindrical.
- the ceramic body 1 is provided with a tapered portion 11 at the rear end.
- the tapered portion 11 has an end surface and an outer peripheral surface.
- the taper portion 11 has a length of 1.5 mm in the longitudinal direction of the ceramic body 1 and The diameter can be 1.5 mm.
- the heating resistor 2 is a member that generates heat when a current flows.
- the heating resistor 2 is embedded in the ceramic body 1.
- One end of the heat generating resistor 2 is drawn to the tapered portion 11.
- the heating resistor 2 has, for example, carbides or nitrides such as tungsten, molybdenum or titanium.
- the heating resistor 2 may contain the same material as that of the ceramic body 1 in order to make the coefficient of thermal expansion close to the coefficient of thermal expansion of the ceramic body 1.
- the dimensions of the heating resistor 2 can be, for example, 0.1 to 2 mm in width, 0.1 to 3 mm in thickness, and 20 to 100 mm in length.
- the heat generating resistor 2 has a heat generating portion 21 which is a heat generating portion, and a lead-out portion 22 connected to the heat generating portion 21.
- the heat generating portion 21 is provided at the tip of the ceramic body 1.
- the heat generating portion 21 has, for example, a folded shape, and the respective end portions are separately connected to the lead-out portion 22.
- the heat generating portion 21 is a portion that generates the most heat in the vicinity of the center of the folded portion in the folded shape.
- the lead-out portion 22 is a portion for electrically connecting the heat-generating portion 21 and the metal cap 3 or the cylindrical metal fitting 4, and one end is connected to the end of the heat-generating portion 21 and the other end is ceramic. It is derived on the surface of the body 1. In the heater 10 shown in FIG.
- the lead-out portion 22 is connected to each end of the heat generating portion 21, and the other end of one lead-out portion 22 is drawn to the tapered portion 11 of the ceramic body 1.
- the other end of the other lead-out portion 22 is drawn to the outer peripheral surface of the ceramic body 1.
- the heating portion 21 and the lead-out portion 22 may be integrally formed or may be separately formed.
- the resistance value per unit length is made smaller by making the content of the forming material of the ceramic body 1 smaller than that of the heating portion 21 or making the cross-sectional area larger than that of the heating portion 21. It may be lower than that.
- the metal cap 3 is a member for firmly connecting the heating resistor 2 and the external device.
- the metal cap 3 is provided on the tapered portion 11 of the ceramic body 1.
- the distance between the metal cap 3 and the cylindrical metal fitting 4 can be increased.
- a possibility that the metal cap 3 and the cylindrical metal fitting 4 may short-circuit can be reduced.
- the shape of the metal cap 3 corresponds to, for example, the shape of the tapered portion 11.
- the metal cap 3 has, for example, a bottom and a side.
- the bottom of the metal cap 3 can be, for example, a disk shape.
- the side portion of the metal cap 3 has, for example, an annular shape when viewed in a cross section perpendicular to the axial direction of the ceramic body 1 and a shape that spreads away from the bottom.
- the metal cap 3 is attached to the ceramic body 1 so that, for example, the bottom portion faces the end face of the tapered portion 11 and the side portion annularly covers a part of the outer peripheral surface of the tapered portion 11.
- the side may be provided with a slit.
- a lead terminal 6 may be provided at the rear end of the metal cap 3, and the metal cap 3 may be electrically connected to an external device by the lead terminal 6.
- the metal cap 3 has a metal material such as, for example, stainless steel or iron (Fe) -nickel (Ni) -cobalt (Co) alloy.
- the dimensions of the metal cap 3 are, for example, the thickness of the bottom and the side about 0.3 mm, the diameter of the bottom about 1.8 mm, and the length of the ceramic body 1 in the longitudinal direction about 1.2 mm can do.
- the cylindrical metal fitting 4 is a member for holding the ceramic body 1.
- the cylindrical metal fitting 4 is a cylindrical member, and the inner peripheral surface is provided so as to cover the outer peripheral surface of the ceramic body 1 and the tapered portion 11. In other words, the ceramic body 1 is inserted inside the tubular fitting 4.
- the cylindrical metal fitting 4 and the ceramic body 1 are fixed by, for example, a bonding material such as a brazing material.
- the cylindrical metal fitting 4 is electrically connected to the other lead-out portion 22 drawn to the outer peripheral surface of the ceramic body 1.
- the cylindrical metal fitting 4 has, for example, a metal material such as stainless steel, iron (Fe) -nickel (Ni) -cobalt (Co) alloy or nickel alloy.
- the cylindrical metal fitting 4 has a first portion 41 fixed to the outer peripheral surface of the ceramic body 1 and a second portion 42 continuous to the first portion 41 and having a larger inside diameter than the first portion 41 There is.
- the cylindrical metal fitting 4 can hold the ceramic body 1 by fixing the first portion 41 to the outer peripheral surface of the ceramic body 1.
- the inner diameter of the first portion 41 is, for example, 2.5 to 5 mm, and can be determined to correspond to the diameter of the ceramic body 1.
- the first portion 41 and the outer peripheral surface of the ceramic body 1 may be fixed by a bonding material or may be fixed by welding.
- the first portion 41 is fixed to the outer peripheral surface of the ceramic body 1 by a bonding material and in the case where it is fixed by welding, a metallized layer is formed on the outer peripheral surface of the ceramic body 1
- a plated layer or both a metallized layer and a plated layer may be provided.
- "fixed to the outer peripheral surface of the ceramic body 1" referred to here may be, for example, the following configuration. For example, only the portion of the outer peripheral surface of the ceramic body 1 from which the lead-out portion 22 of the heating resistor 2 is drawn may be fixed to the first portion 41.
- a metallized layer, a plated layer or both of a metallized layer and a plated layer may be provided on a portion of the outer peripheral surface of the ceramic body 1 from which the lead-out portion 22 of the heating resistor 2 is drawn.
- the cylindrical fitting 4 can be fixed to the external device at the second portion 42.
- the diameter of the outer periphery of the second portion 42 is, for example, 5 to 10 mm, and can correspond to the size of the external device. Further, the second portion 42 has a larger inner diameter than the first portion 41, whereby the distance to the metal cap 3 can be increased.
- the inner diameter of the second portion 42 can be, for example, greater than 3.0 mm and within 7.5 mm when the inner diameter of the first portion 41 is 3 mm.
- the metal cap 3 is provided inside the second portion 42.
- the distance between the metal cap 3 and the cylindrical metal fitting 4 can be lengthened. Therefore, a possibility that the metal cap 3 and the cylindrical metal fitting 4 will short-circuit can be reduced. As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
- the first portion 41 is a portion for holding the ceramic body 1, when the outer diameter of the ceramic body 1 is to be reduced, the inner diameter of the first portion 41 is made smaller corresponding to the outer diameter of the ceramic body 1.
- the metal cap 3 is provided on the inner side of the second portion 42 so that the insulation distance between the metal cap 3 and the cylindrical metal fitting 4 can be reduced even if the outer diameter of the ceramic body 1 is reduced. You can keep it.
- “inside of the second portion 42” means a region sandwiched by the second portion 42 when the cross section shown in FIGS. 1 to 5 is viewed.
- the second portion 42 of the cylindrical metal fitting 4 is continuous with the first portion 41, and the inner diameter increases with distance from the first portion 41.
- the third portion 421 is continuous with the third portion 421, and the inner diameter is constant. And the fourth portion 422. Thereby, since the internal diameter of the cylindrical metal fitting 4 can be changed gently, when external force is applied to the cylindrical metal fitting 4, stress can be dispersed in the third portion 421. Therefore, the possibility of stress concentration on one point of the cylindrical metal fitting 4 can be reduced. As a result, the durability of the heater 10 against external force can be enhanced.
- the third portion 421 can have, for example, a length in the longitudinal direction of the ceramic body 1 of 0.5 to 5 mm.
- the metal cap 3 may be entirely provided inside the third portion 421.
- the displacement of the tubular fitting 4 due to the vibration becomes larger as it is separated from the ceramic body 1 which is the starting point of the vibration. Therefore, when the ceramic body 1 vibrates due to an external force and the vibration is transmitted to the cylindrical metal fitting 4, the displacement of the cylindrical metal fitting 4 due to the vibration is smaller in the third portion 421 than in the fourth portion 422.
- the displacement of the cylindrical metal fitting 4 temporarily shortens the distance of the cylindrical metal fitting 4 to the metal cap 3 and the metal cap 3 and the cylindrical metal fitting 4 And the possibility of a short circuit between As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
- the metal cap 3 may be entirely provided inside the fourth portion 422.
- the fourth portion 422 is a portion having an inner diameter larger than that of the third portion 421. Therefore, by providing the metal cap 3 inside the fourth portion 422, the distance between the metal cap 3 and the tubular fitting 4 can be increased. Therefore, a possibility that the metal cap 3 and the cylindrical metal fitting 4 will short-circuit can be reduced. As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
- the metal cap 3 may be provided from the inside of the third portion 421 to the inside of the fourth portion 422.
- the conductor layer 5 is provided, for example, from the end face of the tapered portion 11 to the outer peripheral surface.
- the conductor layer 5 has, for example, a metallized layer and a plated layer stacked on the metallized layer.
- a metallized layer for example, a metallized layer containing silver, copper or titanium or a metallized layer containing gold, nickel or palladium can be used.
- the plating layer for example, nickel boron plating, gold plating or nickel plating can be used.
- the thickness of the conductor layer 5 can be, for example, about 5 to 40 ⁇ m. In addition, the thickness of the plating layer can be about 1 ⁇ m.
- the conductor layer 5 is provided so as to extend, for example, by 0.5 to 3 mm from the end face of the tapered portion 11 toward the front end side of the ceramic body 1.
- the conductor layer 5 may be provided so as to be entirely covered by the metal cap 3, or may have a portion that extends to the tip side of the ceramic body 1 more than the metal cap 3.
- the conductor layer 5 may be provided so as to spread on the tip side of the ceramic body 1 more than the metal cap 3, and the whole may be provided inside the second portion 42.
- the distance between the conductor layer 5 and the cylindrical metal fitting 4 can be increased compared to the case where the conductor layer 5 is provided inside the first portion 41. Therefore, a possibility that the conductor layer 5 and the cylindrical metal fitting 4 may short-circuit can be reduced. As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
- the entire conductor layer 5 may be provided inside the third portion 421.
- the displacement of the tubular fitting 4 due to the vibration becomes larger as it is separated from the ceramic body 1 which is the starting point of the vibration. Therefore, when the ceramic body 1 vibrates due to an external force and the vibration is transmitted to the cylindrical metal fitting 4, the displacement of the cylindrical metal fitting 4 due to the vibration is smaller in the third portion 421 than in the fourth portion 422.
- the distance between the conductor layer 5 and the cylindrical metal fitting 4 becomes temporarily short due to the displacement of the cylindrical metal fitting 4, and the conductor layer 5 and the cylindrical metal shape It is possible to reduce the possibility of a short circuit with the fitting 4. As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
- the conductor layer 5 may be entirely provided inside the fourth portion 422.
- the fourth portion 422 is a portion having an inner diameter larger than that of the third portion 421. Therefore, by providing the conductor layer 5 inside the fourth portion 422, the distance between the conductor layer 5 and the cylindrical metal fitting 4 can be increased. Therefore, a possibility that the conductor layer 5 and the cylindrical metal fitting 4 may short-circuit can be reduced. As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
- the conductor layer 5 may be provided from the inner side of the third portion 421 to the inner side of the fourth portion 422.
- Ceramic body 11 Tapered part 2: Heating resistor 21: Heating part 22: Lead-out part 3: Metal cap 4: Tubular fitting 41: First part 42: Second part 421: Third part 422: Fourth part 5: conductor layer 6: lead terminal 10: heater
Abstract
The heater 10 of this disclosure comprises: a ceramic body 1 which is a bar-like member, has a front end and a rear end in a longitudinal direction, and has a tapered section 11 at the rear end; a heat generating resistor 2 embedded in the ceramic body 1 and having one end led out to the tapered section 11; a metallic cap 3 provided to the tapered section 11 and electrically connected to the heat generating resistor 2; and a cylindrical metal fitting 4 mounted to the ceramic body 1 at a distance from the metallic cap 3 so as to cover the outer peripheral surface of the ceramic body 1 and the metallic cap 3. The cylindrical metal fitting 4 has: a first portion 41 having an inner peripheral surface affixed to the outer peripheral surface of the ceramic body 1; and a second portion 42 which is continuous with the first portion 41, has an inner diameter greater than that of the first portion 41, and covers the metallic cap 3.
Description
本開示は、例えば、燃焼式車載暖房装置、石油ファンヒータ、自動車エンジンのグロープラグ、酸素センサ等の各種センサまたは測定機器に利用されるヒータに関するものである。
The present disclosure relates to a heater used for various sensors or measurement devices such as, for example, a combustion-type on-vehicle heating device, an oil fan heater, a glow plug of an automobile engine, and an oxygen sensor.
ヒータとして、例えば特開２０１５－１２５９４７号公報（以下、特許文献１という）に記載のヒータが知られている。特許文献１に記載のヒータは、内部に発熱抵抗体が埋設された棒状のセラミック体と、セラミック体の一端側を囲むように取り付けられた金属外筒と、金属外筒の内側に位置しておりセラミック体の一端に取り付けられた電極金具とを備えている。セラミック体のうち、電極金具が取り付けられた部分は、テーパー形状になっている。電極金具は、発熱抵抗体に電気的に接続されており、電極の役割を果たしている。また、電極金具は、金属外筒の内周面から離れて保持されている。
As a heater, for example, a heater described in Japanese Unexamined Patent Publication No. 2015-125947 (hereinafter referred to as Patent Document 1) is known. The heater described in Patent Document 1 is located inside a metal outer cylinder, a rod-like ceramic body in which a heating resistor is embedded, a metal outer cylinder attached so as to surround one end side of the ceramic body, and And an electrode fitting attached to one end of the ceramic body. The portion of the ceramic body to which the electrode fitting is attached is tapered. The electrode fitting is electrically connected to the heat generating resistor and plays the role of an electrode. Further, the electrode fitting is held apart from the inner circumferential surface of the metal outer cylinder.
本開示の一態様のヒータは、棒状の部材であって、長手方向に先端部と後端部とを有しており、該後端部にテーパー部を有するセラミック体と、該セラミック体に埋設されており、一端が前記テーパー部に引き出された発熱抵抗体と、前記テーパー部に設けられており、前記発熱抵抗体に電気的に接続された金属キャップと、前記セラミック体の外周面および前記金属キャップを覆うように、前記金属キャップから離れて前記セラミック体に取り付けられた筒状金具とを備えており、該筒状金具は、内周面が前記セラミック体の外周面に固定されている第１部分と、該第１部分に連続しており、該第１部分よりも内径が大きく、前記金属キャップを覆う第２部分とを有していることを特徴とする。
The heater according to one aspect of the present disclosure is a rod-like member, which has a front end and a rear end in the longitudinal direction, and a ceramic body having a taper at the rear end, and is embedded in the ceramic body A heat generating resistor whose one end is pulled out to the taper portion, a metal cap provided on the taper portion and electrically connected to the heat generation resistor, an outer peripheral surface of the ceramic body, and A tubular metal fitting attached to the ceramic body apart from the metal cap is provided to cover a metal cap, and the cylindrical metal fitting has an inner peripheral surface fixed to the outer peripheral surface of the ceramic body A first portion and a second portion continuous with the first portion, having a larger inner diameter than the first portion, and covering the metal cap.
以下、本開示の一例のヒータ１０について、図面を参照しながら説明する。図１は本開示の一例のヒータ１０を示す断面図である。図１に示すように、ヒータ１０は、棒状のセラミック体１と、セラミック体１に埋設された発熱抵抗体２と、セラミック体１の後端部に設けられた金属キャップ３と、セラミック体１の外周面を覆うように設けられた筒状金具４とを備えている。
Hereinafter, the heater 10 according to an example of the present disclosure will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a heater 10 according to an example of the present disclosure. As shown in FIG. 1, the heater 10 includes a rod-shaped ceramic body 1, a heating resistor 2 embedded in the ceramic body 1, a metal cap 3 provided at the rear end of the ceramic body 1, and the ceramic body 1. And a cylindrical metal fitting 4 provided to cover the outer peripheral surface of the housing.
セラミック体１は、発熱抵抗体２を保護するための部材である。セラミック体１は例えば円柱状または角柱状等の、棒状の部材である。セラミック体１は、長手方向に先端部と後端部とを有している。セラミック体１は、例えば酸化物セラミックス、窒化物セラミックスまたは炭化物セラミックス等のセラミックスを有する。セラミック体１の寸法は、例えばセラミック体１が円柱状のときは、長さを２０～５０ｍｍに、直径を２．５～５ｍｍにすることができる。
The ceramic body 1 is a member for protecting the heating resistor 2. The ceramic body 1 is, for example, a rod-like member having a cylindrical or prismatic shape. The ceramic body 1 has a front end and a rear end in the longitudinal direction. The ceramic body 1 includes, for example, a ceramic such as an oxide ceramic, a nitride ceramic, or a carbide ceramic. The dimensions of the ceramic body 1 can be, for example, 20 to 50 mm in length and 2.5 to 5 mm in diameter when the ceramic body 1 is cylindrical.
また、セラミック体１は、後端部にテーパー部１１が設けられている。テーパー部１１は、端面と外周面とを有している。テーパー部１１の寸法は、例えばセラミック体１の長さが２０～４０ｍｍであって、直径が３ｍｍ程度である場合には、セラミック体１の長さ方向の長さを１．５ｍｍに、端面の直径を１．５ｍｍにすることができる。
Further, the ceramic body 1 is provided with a tapered portion 11 at the rear end. The tapered portion 11 has an end surface and an outer peripheral surface. For example, when the length of the ceramic body 1 is 20 to 40 mm and the diameter is about 3 mm, the taper portion 11 has a length of 1.5 mm in the longitudinal direction of the ceramic body 1 and The diameter can be 1.5 mm.
発熱抵抗体２は、電流が流れることによって発熱する部材である。発熱抵抗体２は、セラミック体１に埋設されている。発熱抵抗体２は、一端がテーパー部１１に引き出されている。発熱抵抗体２は、例えばタングステン、モリブデンまたはチタン等の炭化物または窒化物を有する。さらに、発熱抵抗体２は、熱膨張率をセラミック体１の熱膨張率に近づけるために、セラミック体１と同じ材料を含んでいてもよい。発熱抵抗体２の寸法は、例えば幅を０．１～２ｍｍに、厚みを０．１～３ｍｍに、長さを２０～１００ｍｍにすることができる。
The heating resistor 2 is a member that generates heat when a current flows. The heating resistor 2 is embedded in the ceramic body 1. One end of the heat generating resistor 2 is drawn to the tapered portion 11. The heating resistor 2 has, for example, carbides or nitrides such as tungsten, molybdenum or titanium. Furthermore, the heating resistor 2 may contain the same material as that of the ceramic body 1 in order to make the coefficient of thermal expansion close to the coefficient of thermal expansion of the ceramic body 1. The dimensions of the heating resistor 2 can be, for example, 0.1 to 2 mm in width, 0.1 to 3 mm in thickness, and 20 to 100 mm in length.
発熱抵抗体２は、発熱する部分である発熱部２１と、発熱部２１に接続された導出部２２とを有している。発熱部２１は、セラミック体１の先端部に設けられている。発熱部２１は、例えば折返し形状を有しており、それぞれの端部が別々に導出部２２に接続されている。発熱部２１は、折返し形状における折返し部の中央付近が最も発熱する部分となっている。導出部２２は、発熱部２１と金属キャップ３または筒状金具４とを電気的に接続するための部分であって、一端が発熱部２１の端部に接続されているとともに、他端がセラミック体１の表面に導出されている。図１に示すヒータ１０においては、発熱部２１の端部のそれぞれに導出部２２が接続されており、一方の導出部２２は、他端がセラミック体１のテーパー部１１に引き出されている。また、他方の導出部２２は、他端がセラミック体１の外周面に引き出されている。
The heat generating resistor 2 has a heat generating portion 21 which is a heat generating portion, and a lead-out portion 22 connected to the heat generating portion 21. The heat generating portion 21 is provided at the tip of the ceramic body 1. The heat generating portion 21 has, for example, a folded shape, and the respective end portions are separately connected to the lead-out portion 22. The heat generating portion 21 is a portion that generates the most heat in the vicinity of the center of the folded portion in the folded shape. The lead-out portion 22 is a portion for electrically connecting the heat-generating portion 21 and the metal cap 3 or the cylindrical metal fitting 4, and one end is connected to the end of the heat-generating portion 21 and the other end is ceramic. It is derived on the surface of the body 1. In the heater 10 shown in FIG. 1, the lead-out portion 22 is connected to each end of the heat generating portion 21, and the other end of one lead-out portion 22 is drawn to the tapered portion 11 of the ceramic body 1. The other end of the other lead-out portion 22 is drawn to the outer peripheral surface of the ceramic body 1.
なお、発熱抵抗体２は、発熱部２１と導出部２２とが一体に形成されていてもよいし、別々に形成されていてもよい。導出部２２は、セラミック体１の形成材料の含有量を発熱部２１よりも少なくしたり、発熱部２１よりも断面積を大きくしたりすることによって、単位長さ辺りの抵抗値が発熱部２１よりも低くなっていてもよい。
In the heating resistor 2, the heating portion 21 and the lead-out portion 22 may be integrally formed or may be separately formed. In the lead-out portion 22, the resistance value per unit length is made smaller by making the content of the forming material of the ceramic body 1 smaller than that of the heating portion 21 or making the cross-sectional area larger than that of the heating portion 21. It may be lower than that.
金属キャップ３は、発熱抵抗体２と外部装置との接続を強固に行なうための部材である。金属キャップ３は、セラミック体１のテーパー部１１に設けられている。これにより、セラミック体１の外周面に筒状金具４を設けた場合において、金属キャップ３と筒状金具４との距離を大きくすることができる。これにより、金属キャップ３と筒状金具４とが短絡するおそれを低減することができる。金属キャップ３の形状は、例えばテーパー部１１の形状に対応している。
The metal cap 3 is a member for firmly connecting the heating resistor 2 and the external device. The metal cap 3 is provided on the tapered portion 11 of the ceramic body 1. Thereby, when the cylindrical metal fitting 4 is provided on the outer peripheral surface of the ceramic body 1, the distance between the metal cap 3 and the cylindrical metal fitting 4 can be increased. Thereby, a possibility that the metal cap 3 and the cylindrical metal fitting 4 may short-circuit can be reduced. The shape of the metal cap 3 corresponds to, for example, the shape of the tapered portion 11.
金属キャップ３は、例えば底部と側部とを有している。セラミック体１のテーパー部１１の端面が円形である場合、金属キャップ３の底部は、例えば円板状とすることができる。この場合、金属キャップ３の側部は、例えば、セラミック体１の軸方向に垂直な断面で見たときの形状が円環状であって、底部から離れるにつれて広がる形状である。金属キャップ３は、例えば底部がテーパー部１１の端面に面するとともに、側部がテーパー部１１の外周面の一部を環状に覆うようにしてセラミック体１に取り付けられる。側部には、スリットが設けられていてもよい。これにより、金属キャップ３とセラミック体１との熱膨張差に起因する熱応力が金属キャップ３に生じる可能性を低減することができる。金属キャップ３の後端には、リード端子６が設けられており、金属キャップ３は、リード端子６によって外部装置に電気的に接続されていてもよい。
The metal cap 3 has, for example, a bottom and a side. When the end face of the tapered portion 11 of the ceramic body 1 is circular, the bottom of the metal cap 3 can be, for example, a disk shape. In this case, the side portion of the metal cap 3 has, for example, an annular shape when viewed in a cross section perpendicular to the axial direction of the ceramic body 1 and a shape that spreads away from the bottom. The metal cap 3 is attached to the ceramic body 1 so that, for example, the bottom portion faces the end face of the tapered portion 11 and the side portion annularly covers a part of the outer peripheral surface of the tapered portion 11. The side may be provided with a slit. Thereby, the possibility that the thermal stress resulting from the thermal expansion difference of metal cap 3 and ceramic body 1 may arise in metal cap 3 can be reduced. A lead terminal 6 may be provided at the rear end of the metal cap 3, and the metal cap 3 may be electrically connected to an external device by the lead terminal 6.
金属キャップ３は、例えばステンレスまたは鉄（Ｆｅ）－ニッケル（Ｎｉ）－コバルト（Ｃｏ）合金等の金属材料を有する。金属キャップ３の寸法は、例えば底部および側部の厚みを０．３ｍｍ程度に、底部の直径を１．８ｍｍ程度に、側部のセラミック体１の長さ方向の長さを１．２ｍｍ程度にすることができる。
The metal cap 3 has a metal material such as, for example, stainless steel or iron (Fe) -nickel (Ni) -cobalt (Co) alloy. The dimensions of the metal cap 3 are, for example, the thickness of the bottom and the side about 0.3 mm, the diameter of the bottom about 1.8 mm, and the length of the ceramic body 1 in the longitudinal direction about 1.2 mm can do.
筒状金具４は、セラミック体１を保持するための部材である。筒状金具４は、筒状の部材であって、内周面がセラミック体１の外周面およびテーパー部１１を覆うように設けられている。言い換えると、筒状金具４の内側にセラミック体１が挿入されている。筒状金具４とセラミック体１とは、例えばろう材等の接合材によって固定されている。筒状金具４は、セラミック体１の外周面に引き出された他方の導出部２２に電気的に接続されている。筒状金具４は、例えば、ステンレス、鉄（Ｆｅ）－ニッケル（Ｎｉ）－コバルト（Ｃｏ）合金またはニッケル合金等の金属材料を有する。
The cylindrical metal fitting 4 is a member for holding the ceramic body 1. The cylindrical metal fitting 4 is a cylindrical member, and the inner peripheral surface is provided so as to cover the outer peripheral surface of the ceramic body 1 and the tapered portion 11. In other words, the ceramic body 1 is inserted inside the tubular fitting 4. The cylindrical metal fitting 4 and the ceramic body 1 are fixed by, for example, a bonding material such as a brazing material. The cylindrical metal fitting 4 is electrically connected to the other lead-out portion 22 drawn to the outer peripheral surface of the ceramic body 1. The cylindrical metal fitting 4 has, for example, a metal material such as stainless steel, iron (Fe) -nickel (Ni) -cobalt (Co) alloy or nickel alloy.
筒状金具４は、セラミック体１の外周面に固定されている第１部分４１と、第１部分４１に連続しており第１部分４１よりも内径が大きい第２部分４２とを有している。筒状金具４は、第１部分４１がセラミック体１の外周面に固定されることで、セラミック体１を保持することができる。第１部分４１の内径は、例えば２．５～５ｍｍであって、セラミック体１の直径に対応させて定めることができる。なお、第１部分４１とセラミック体１の外周面とは、接合材によって固定されていてもよいし、溶接によって固定されていてもよい。さらに、第１部分４１がセラミック体１の外周面に接合材によって固定されている場合と、溶接によって固定されている場合との、両方の場合において、セラミック体１の外周面には、メタライズ層、メッキ層またはメタライズ層およびメッキ層の両方が設けられていてもよい。さらに、ここでいう「セラミック体１の外周面に固定されている」とは、例えば、以下のような構成であってもよい。例えば、セラミック体１の外周面のうち発熱抵抗体２の導出部２２が引き出された部分のみが第１部分４１と固定されていてもよい。このときに、セラミック体１の外周面のうち発熱抵抗体２の導出部２２が引き出された部分には、メタライズ層、メッキ層またはメタライズ層およびメッキ層の両方が設けられていてもよい。
The cylindrical metal fitting 4 has a first portion 41 fixed to the outer peripheral surface of the ceramic body 1 and a second portion 42 continuous to the first portion 41 and having a larger inside diameter than the first portion 41 There is. The cylindrical metal fitting 4 can hold the ceramic body 1 by fixing the first portion 41 to the outer peripheral surface of the ceramic body 1. The inner diameter of the first portion 41 is, for example, 2.5 to 5 mm, and can be determined to correspond to the diameter of the ceramic body 1. The first portion 41 and the outer peripheral surface of the ceramic body 1 may be fixed by a bonding material or may be fixed by welding. Furthermore, in the case where the first portion 41 is fixed to the outer peripheral surface of the ceramic body 1 by a bonding material and in the case where it is fixed by welding, a metallized layer is formed on the outer peripheral surface of the ceramic body 1 A plated layer or both a metallized layer and a plated layer may be provided. Furthermore, "fixed to the outer peripheral surface of the ceramic body 1" referred to here may be, for example, the following configuration. For example, only the portion of the outer peripheral surface of the ceramic body 1 from which the lead-out portion 22 of the heating resistor 2 is drawn may be fixed to the first portion 41. At this time, a metallized layer, a plated layer or both of a metallized layer and a plated layer may be provided on a portion of the outer peripheral surface of the ceramic body 1 from which the lead-out portion 22 of the heating resistor 2 is drawn.
筒状金具４は、第２部分４２において、外部装置に固定することができる。第２部分４２の外周の径は、例えば５～１０ｍｍであって、外部装置の寸法に対応させることができる。また、第２部分４２は、第１部分４１より内径が大きいことにより、金属キャップ３との距離を長くすることができる。第２部分４２の内径は、例えば第１部分４１の内径が３ｍｍのときに、３．０ｍｍより大きく、７．５ｍｍ以内にすることができる。
The cylindrical fitting 4 can be fixed to the external device at the second portion 42. The diameter of the outer periphery of the second portion 42 is, for example, 5 to 10 mm, and can correspond to the size of the external device. Further, the second portion 42 has a larger inner diameter than the first portion 41, whereby the distance to the metal cap 3 can be increased. The inner diameter of the second portion 42 can be, for example, greater than 3.0 mm and within 7.5 mm when the inner diameter of the first portion 41 is 3 mm.
本開示のヒータ１０において、金属キャップ３は、第２部分４２の内側に設けられている。これにより、金属キャップ３が第１部分４１の内側に設けられている場合と比較して、金属キャップ３と筒状金具４との間の距離を長くすることができる。したがって、金属キャップ３と筒状金具４とが短絡してしまうおそれを低減することができる。その結果、ヒータ１０における電気的接続の長期信頼性を向上させることができる。
In the heater 10 of the present disclosure, the metal cap 3 is provided inside the second portion 42. Thereby, compared with the case where the metal cap 3 is provided inside the 1st part 41, the distance between the metal cap 3 and the cylindrical metal fitting 4 can be lengthened. Therefore, a possibility that the metal cap 3 and the cylindrical metal fitting 4 will short-circuit can be reduced. As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
また、第１部分４１は、セラミック体１を保持する部分であるため、セラミック体１の外径を小さくする場合においては、第１部分４１の内径をセラミック体１の外径に対応させて小さくする必要がある。本開示のヒータ１０においては、金属キャップ３が第２部分４２の内側に設けられていることにより、セラミック体１の外径を小さくしても、金属キャップ３と筒状金具４の絶縁距離を保つことができる。なお、ここでいう「第２部分４２の内側」とは、図１～図５に示す断面をみたときに、第２部分４２に挟まれた領域を意味している。
Further, since the first portion 41 is a portion for holding the ceramic body 1, when the outer diameter of the ceramic body 1 is to be reduced, the inner diameter of the first portion 41 is made smaller corresponding to the outer diameter of the ceramic body 1. There is a need to. In the heater 10 of the present disclosure, the metal cap 3 is provided on the inner side of the second portion 42 so that the insulation distance between the metal cap 3 and the cylindrical metal fitting 4 can be reduced even if the outer diameter of the ceramic body 1 is reduced. You can keep it. Here, “inside of the second portion 42” means a region sandwiched by the second portion 42 when the cross section shown in FIGS. 1 to 5 is viewed.
筒状金具４のうち第２部分４２は、第１部分４１に連続しており第１部分４１から離れるにつれて内径が大きくなる第３部分４２１と、第３部分４２１に連続しており内径が一定である第４部分４２２とを有していてもよい。これにより、筒状金具４の内径を緩やかに変化させることができるので、筒状金具４に外力が加わったときに、第３部分４２１において応力を分散させることができる。そのため、筒状金具４の一点に応力が集中するおそれを低減することができる。その結果、外力に対するヒータ１０の耐久性を高めることができる。第３部分４２１は、例えばセラミック体１の長さ方向の長さを０．５～５ｍｍにすることができる。
The second portion 42 of the cylindrical metal fitting 4 is continuous with the first portion 41, and the inner diameter increases with distance from the first portion 41. The third portion 421 is continuous with the third portion 421, and the inner diameter is constant. And the fourth portion 422. Thereby, since the internal diameter of the cylindrical metal fitting 4 can be changed gently, when external force is applied to the cylindrical metal fitting 4, stress can be dispersed in the third portion 421. Therefore, the possibility of stress concentration on one point of the cylindrical metal fitting 4 can be reduced. As a result, the durability of the heater 10 against external force can be enhanced. The third portion 421 can have, for example, a length in the longitudinal direction of the ceramic body 1 of 0.5 to 5 mm.
また、図２に示すように、金属キャップ３は、全体が第３部分４２１の内側に設けられていてもよい。外力によってセラミック体１が振動し、振動が筒状金具４に伝わる場合においては、振動による筒状金具４の変位は、振動の起点となるセラミック体１から離れるほど大きくなる。そのため、外力によってセラミック体１が振動し、振動が筒状金具４に伝わる場合に、振動による筒状金具４の変位は第４部分４２２よりも第３部分４２１のほうが小さくなる。そのため、金属キャップ３を第３部分４２１の内側に設けることによって、筒状金具４の変位により金属キャップ３に対する筒状金具４の距離が一時的に近くなってしまい金属キャップ３と筒状金具４とが短絡するおそれを低減できる。その結果、ヒータ１０における電気的接続の長期信頼性を向上させることができる。
Further, as shown in FIG. 2, the metal cap 3 may be entirely provided inside the third portion 421. In the case where the ceramic body 1 vibrates due to an external force and the vibration is transmitted to the tubular fitting 4, the displacement of the tubular fitting 4 due to the vibration becomes larger as it is separated from the ceramic body 1 which is the starting point of the vibration. Therefore, when the ceramic body 1 vibrates due to an external force and the vibration is transmitted to the cylindrical metal fitting 4, the displacement of the cylindrical metal fitting 4 due to the vibration is smaller in the third portion 421 than in the fourth portion 422. Therefore, by providing the metal cap 3 inside the third portion 421, the displacement of the cylindrical metal fitting 4 temporarily shortens the distance of the cylindrical metal fitting 4 to the metal cap 3 and the metal cap 3 and the cylindrical metal fitting 4 And the possibility of a short circuit between As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
また、図３に示すように、金属キャップ３は、全体が第４部分４２２の内側に設けられていてもよい。第４部分４２２は第３部分４２１より内径が大きい部分である。そのため、金属キャップ３を第４部分４２２の内側に設けることによって、金属キャップ３と筒状金具４との間の距離を長くすることができる。したがって、金属キャップ３と筒状金具４とが短絡してしまうおそれを低減することができる。その結果、ヒータ１０における電気的接続の長期信頼性を向上させることができる。
Further, as shown in FIG. 3, the metal cap 3 may be entirely provided inside the fourth portion 422. The fourth portion 422 is a portion having an inner diameter larger than that of the third portion 421. Therefore, by providing the metal cap 3 inside the fourth portion 422, the distance between the metal cap 3 and the tubular fitting 4 can be increased. Therefore, a possibility that the metal cap 3 and the cylindrical metal fitting 4 will short-circuit can be reduced. As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
なお、金属キャップ３は、第３部分４２１の内側から第４部分４２２の内側にかけて設けられていてもよい。
The metal cap 3 may be provided from the inside of the third portion 421 to the inside of the fourth portion 422.
また、図４に示すように、金属キャップ３と発熱抵抗体２とは、導体層５を介して電気的に接続されていてもよい。導体層５は、例えばテーパー部１１の端面から外周面にかけて設けられている。導体層５は、例えばメタライズ層およびメタライズ層に積層されたメッキ層を有する。メタライズ層としては、例えば、銀、銅あるいはチタンを含むメタライズ層または金、ニッケルあるいはパラジウムを含むメタライズ層を用いることができる。メッキ層としては、例えばニッケルボロンメッキ、金メッキまたはニッケルメッキを用いることができる。導体層５の厚みは、例えばメタライズ層の厚みを５～４０μｍ程度にすることができる。また、メッキ層の厚みを、１μｍ程度にすることができる。
In addition, as shown in FIG. 4, the metal cap 3 and the heating resistor 2 may be electrically connected via the conductor layer 5. The conductor layer 5 is provided, for example, from the end face of the tapered portion 11 to the outer peripheral surface. The conductor layer 5 has, for example, a metallized layer and a plated layer stacked on the metallized layer. As the metallized layer, for example, a metallized layer containing silver, copper or titanium or a metallized layer containing gold, nickel or palladium can be used. As the plating layer, for example, nickel boron plating, gold plating or nickel plating can be used. The thickness of the conductor layer 5 can be, for example, about 5 to 40 μm. In addition, the thickness of the plating layer can be about 1 μm.
導体層５は、例えばテーパー部１１の端面からセラミック体１の先端側に向かって０．５～３ｍｍ広がるように設けられている。導体層５は、全体が金属キャップ３に覆われるように設けられていてもよいし、金属キャップ３よりもセラミック体１の先端側に広がる部分を有していてもよい。なお、導体層５と金属キャップ３との間には隙間があり、隙間にろう材等の導電性の接合材が設けられていてもよい。これにより、金属キャップ３の固定の強度を高めることができる。
The conductor layer 5 is provided so as to extend, for example, by 0.5 to 3 mm from the end face of the tapered portion 11 toward the front end side of the ceramic body 1. The conductor layer 5 may be provided so as to be entirely covered by the metal cap 3, or may have a portion that extends to the tip side of the ceramic body 1 more than the metal cap 3. There may be a gap between the conductor layer 5 and the metal cap 3 and a conductive bonding material such as brazing material may be provided in the gap. Thereby, the strength of fixation of the metal cap 3 can be increased.
また、図４に示すように、導体層５が金属キャップ３よりもセラミック体１の先端側に広がるように設けられているとともに、全体が第２部分４２の内側に設けられていてもよい。これにより、導体層５が第１部分４１の内側に設けられている場合と比較して、導体層５と筒状金具４との間の距離を長くすることができる。したがって、導体層５と筒状金具４とが短絡してしまうおそれを低減することができる。その結果、ヒータ１０における電気的接続の長期信頼性を向上させることができる。
In addition, as shown in FIG. 4, the conductor layer 5 may be provided so as to spread on the tip side of the ceramic body 1 more than the metal cap 3, and the whole may be provided inside the second portion 42. As a result, the distance between the conductor layer 5 and the cylindrical metal fitting 4 can be increased compared to the case where the conductor layer 5 is provided inside the first portion 41. Therefore, a possibility that the conductor layer 5 and the cylindrical metal fitting 4 may short-circuit can be reduced. As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
また、図４に示すように、導体層５は、全体が第３部分４２１の内側に設けられていてもよい。外力によってセラミック体１が振動し、振動が筒状金具４に伝わる場合においては、振動による筒状金具４の変位は、振動の起点となるセラミック体１から離れるほど大きくなる。そのため、外力によってセラミック体１が振動し、振動が筒状金具４に伝わる場合に、振動による筒状金具４の変位は第４部分４２２よりも第３部分４２１のほうが小さくなる。そのため、金属キャップ３を第３部分４２１の内側に設けることによって、筒状金具４の変位により導体層５と筒状金具４との距離が一時的に近くなってしまい、導体層５と筒状金具４とが短絡するおそれを低減できる。その結果、ヒータ１０における電気的接続の長期信頼性を向上させることができる。
Further, as shown in FIG. 4, the entire conductor layer 5 may be provided inside the third portion 421. In the case where the ceramic body 1 vibrates due to an external force and the vibration is transmitted to the tubular fitting 4, the displacement of the tubular fitting 4 due to the vibration becomes larger as it is separated from the ceramic body 1 which is the starting point of the vibration. Therefore, when the ceramic body 1 vibrates due to an external force and the vibration is transmitted to the cylindrical metal fitting 4, the displacement of the cylindrical metal fitting 4 due to the vibration is smaller in the third portion 421 than in the fourth portion 422. Therefore, by providing the metal cap 3 inside the third portion 421, the distance between the conductor layer 5 and the cylindrical metal fitting 4 becomes temporarily short due to the displacement of the cylindrical metal fitting 4, and the conductor layer 5 and the cylindrical metal shape It is possible to reduce the possibility of a short circuit with the fitting 4. As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
また、図５に示すように、導体層５は、全体が第４部分４２２の内側に設けられていてもよい。第４部分４２２は第３部分４２１より内径が大きい部分である。そのため、導体層５を第４部分４２２の内側に設けることによって、導体層５と筒状金具４との間の距離を長くすることができる。したがって、導体層５と筒状金具４とが短絡してしまうおそれを低減することができる。その結果、ヒータ１０における電気的接続の長期信頼性を向上させることができる。
Further, as shown in FIG. 5, the conductor layer 5 may be entirely provided inside the fourth portion 422. The fourth portion 422 is a portion having an inner diameter larger than that of the third portion 421. Therefore, by providing the conductor layer 5 inside the fourth portion 422, the distance between the conductor layer 5 and the cylindrical metal fitting 4 can be increased. Therefore, a possibility that the conductor layer 5 and the cylindrical metal fitting 4 may short-circuit can be reduced. As a result, the long-term reliability of the electrical connection in the heater 10 can be improved.
なお、導体層５は、第３部分４２１の内側から第４部分４２２の内側にかけて設けられていてもよい。
The conductor layer 5 may be provided from the inner side of the third portion 421 to the inner side of the fourth portion 422.
１：セラミック体
１１：テーパー部
２：発熱抵抗体
２１：発熱部
２２：導出部
３：金属キャップ
４：筒状金具
４１：第１部分
４２：第２部分
４２１：第３部分
４２２：第４部分
５：導体層
６：リード端子
１０：ヒータ 1: Ceramic body 11: Tapered part 2: Heating resistor 21: Heating part 22: Lead-out part 3: Metal cap 4: Tubular fitting 41: First part 42: Second part 421: Third part 422: Fourth part 5: conductor layer 6: lead terminal 10: heater
１１：テーパー部
２：発熱抵抗体
２１：発熱部
２２：導出部
３：金属キャップ
４：筒状金具
４１：第１部分
４２：第２部分
４２１：第３部分
４２２：第４部分
５：導体層
６：リード端子
１０：ヒータ 1: Ceramic body 11: Tapered part 2: Heating resistor 21: Heating part 22: Lead-out part 3: Metal cap 4: Tubular fitting 41: First part 42: Second part 421: Third part 422: Fourth part 5: conductor layer 6: lead terminal 10: heater
Claims (6)
- 棒状の部材であって、長手方向に先端部と後端部とを有しており、該後端部にテーパー部を有するセラミック体と、該セラミック体に埋設されており、一端が前記テーパー部に引き出された発熱抵抗体と、前記テーパー部に設けられており、前記発熱抵抗体に電気的に接続された金属キャップと、前記セラミック体の外周面および前記金属キャップを覆うように、前記金属キャップから離れて前記セラミック体に取り付けられた筒状金具とを備えており、
該筒状金具は、内周面が前記セラミック体の外周面に固定されている第１部分と、該第１部分に連続しており、該第１部分よりも内径が大きく、前記金属キャップを覆う第２部分とを有していることを特徴とするヒータ。 A rod-like member having a front end and a rear end in the longitudinal direction, and a ceramic body having a taper at the rear end, and being embedded in the ceramic body, one end of which is the taper And the metal cap provided on the tapered portion and electrically connected to the heat generating resistor, the outer peripheral surface of the ceramic body, and the metal cap so as to cover the metal cap. And a tubular fitting attached to the ceramic body away from the cap;
The cylindrical metal fitting is continuous with the first portion whose inner circumferential surface is fixed to the outer circumferential surface of the ceramic body and the first portion, and the inner diameter is larger than that of the first portion, and the metal cap A heater having a covering second portion. - 前記第２部分は、前記第１部分に連続しており前記第１部分から離れるにつれて内径が大きくなる第３部分と、該第３部分に連続しており内径が一定である第４部分とを有しているとともに、
前記金属キャップは、全体が前記第３部分の内側に設けられていることを特徴とする請求項１に記載のヒータ。 The second part is a third part which is continuous with the first part and whose internal diameter increases with distance from the first part, and a fourth part which is continuous with the third part and whose internal diameter is constant With
The heater according to claim 1, wherein the metal cap is provided entirely inside the third portion. - 前記第２部分は、前記第１部分に連続しており前記第１部分から離れるにつれて内径が大きくなる第３部分と、該第３部分に連続しており内径が一定である第４部分とを有しているとともに、
前記金属キャップは、全体が前記第４部分の内側に設けられていることを特徴とする請求項１に記載のヒータ。 The second part is a third part which is continuous with the first part and whose internal diameter increases with distance from the first part, and a fourth part which is continuous with the third part and whose internal diameter is constant With
The heater according to claim 1, wherein the metal cap is provided entirely inside the fourth portion. - 前記金属キャップは、前記テーパー部の端面および外周面に接する導体層を介して、前記発熱抵抗体に電気的に接続されており、
前記導体層は、前記金属キャップとともに、全体が前記第２部分の内側に設けられていることを特徴とする請求項１乃至３のいずれかに記載のヒータ。 The metal cap is electrically connected to the heating resistor through a conductor layer in contact with the end face and the outer peripheral surface of the tapered portion.
The heater according to any one of claims 1 to 3, wherein the conductor layer is provided entirely inside the second portion together with the metal cap. - 前記第２部分は、前記第１部分に連続しており前記第１部分から離れるにつれて内径が大きくなる第３部分と、該第３部分に連続しており内径が一定である第４部分とを有しているとともに、
前記導体層は、全体が前記第３部分の内側に設けられていることを特徴とする請求項４に記載のヒータ。 The second part is a third part which is continuous with the first part and whose internal diameter increases with distance from the first part, and a fourth part which is continuous with the third part and whose internal diameter is constant With
The heater according to claim 4, wherein the conductor layer is entirely provided inside the third portion. - 前記第２部分は、前記第１部分に連続しており前記第１部分から離れるにつれて内径が大きくなる第３部分と、該第３部分に連続しており内径が一定である第４部分とを有しているとともに、
前記導体層は、全体が前記第４部分の内側に設けられていることを特徴とする請求項４に記載のヒータ。 The second part is a third part which is continuous with the first part and whose internal diameter increases with distance from the first part, and a fourth part which is continuous with the third part and whose internal diameter is constant With
The heater according to claim 4, wherein the conductor layer is provided entirely inside the fourth portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| JP2019526723A JPWO2019003777A1 (en) | 2017-06-29 | 2018-05-30 | heater |
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| JP2017-127180 | 2017-06-29 | ||
| JP2017127180 | 2017-06-29 |
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| WO2019003777A1 true WO2019003777A1 (en) | 2019-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2018/020787 WO2019003777A1 (en) | 2017-06-29 | 2018-05-30 | Heater |
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| WO (1) | WO2019003777A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010080257A (en) * | 2008-09-26 | 2010-04-08 | Kyocera Corp | Ceramic heater |
| WO2014017542A1 (en) * | 2012-07-27 | 2014-01-30 | 日産化学工業株式会社 | Silicon-containing hyperbranched polymer and curable composition containing same |
| WO2015064598A1 (en) * | 2013-10-28 | 2015-05-07 | 京セラ株式会社 | Heater and glow plug |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60140396U (en) * | 1984-02-27 | 1985-09-17 | 三洋電機株式会社 | sheath heater |
| JPH10332149A (en) * | 1997-03-31 | 1998-12-15 | Ngk Spark Plug Co Ltd | Ceramic heater |
| JP5989896B2 (en) * | 2013-04-27 | 2016-09-07 | 京セラ株式会社 | Ceramic heater |
-
2018
- 2018-05-30 WO PCT/JP2018/020787 patent/WO2019003777A1/en active Application Filing
- 2018-05-30 JP JP2019526723A patent/JPWO2019003777A1/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010080257A (en) * | 2008-09-26 | 2010-04-08 | Kyocera Corp | Ceramic heater |
| WO2014017542A1 (en) * | 2012-07-27 | 2014-01-30 | 日産化学工業株式会社 | Silicon-containing hyperbranched polymer and curable composition containing same |
| WO2015064598A1 (en) * | 2013-10-28 | 2015-05-07 | 京セラ株式会社 | Heater and glow plug |
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| JPWO2019003777A1 (en) | 2019-12-12 |
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