WO2015056404A1 - 温度センサおよびその製造方法 - Google Patents
温度センサおよびその製造方法 Download PDFInfo
- Publication number
- WO2015056404A1 WO2015056404A1 PCT/JP2014/004806 JP2014004806W WO2015056404A1 WO 2015056404 A1 WO2015056404 A1 WO 2015056404A1 JP 2014004806 W JP2014004806 W JP 2014004806W WO 2015056404 A1 WO2015056404 A1 WO 2015056404A1
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- WIPO (PCT)
- Prior art keywords
- mold resin
- resin body
- temperature sensor
- terminal
- temperature
- Prior art date
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
Definitions
- the present invention relates to a temperature sensor in which a temperature sensitive element is covered with a molded resin body and a method for manufacturing the same.
- the configuration of a temperature sensor having a temperature sensitive element covered with a molded resin body is as follows.
- a temperature sensing element such as a thermistor and a terminal are connected by a lead wire to form a detection body.
- This detection body is molded and embedded in a resin case.
- the position of the temperature sensitive element in the resin case greatly affects the temperature detection accuracy. Therefore, it is important to increase the positional accuracy of the temperature sensitive element.
- Patent Documents 1 to 3 are known in order to increase the position accuracy of the temperature sensitive element.
- the configuration of the temperature sensor of Patent Document 1 is as shown in FIG.
- the resin case 1 has an opening, and a detection body 5 including a temperature sensing element 2, a terminal 3, and a lead wire 4 is inserted into the opening.
- the opening is filled with the mold resin 6, and the detection body 5, the resin case 1, and the mold resin 6 are integrated.
- the configuration of the temperature sensor of Patent Document 2 is as shown in FIG.
- the lead wire 4 is covered with an insulating resin 7.
- the structure of the temperature sensor of Patent Document 3 is as shown in FIG.
- the detection body 5 composed of the temperature sensing element 2, the terminal 3 and the lead wire 4 is molded, the temperature sensing element 2 is positioned by the positioning pins 8.
- a temperature sensing element disposed at a first end, a terminal disposed at a second end, and a lead wire connecting the temperature sensing element and the terminal are provided.
- a first mold resin body that covers the detection body, the temperature sensing element, a part of the terminal, and the lead wire, a part of the terminal exposed from the first mold resin body, and the first mold resin body And a second mold resin body covering.
- the surface in which the gate trace of the 2nd mold resin body was formed is facing the 1st edge part side, It is characterized by the above-mentioned.
- a first step of forming a detection body by connecting a terminal and a temperature sensitive element with a lead wire, a temperature sensitive element, and a terminal A second step of forming a first mold resin body covering the portion and the lead wire, a part of the terminal exposed from the first mold resin body, and a second mold covering the first mold resin body
- a third step of molding the mold resin body, and in the third step, the mold resin has a second end portion where the coupler portion is disposed from the first end portion where the temperature sensitive element is disposed.
- the molding die is filled along the first direction toward.
- the above configuration makes it possible to manufacture a temperature sensor that can suppress variations in detection accuracy.
- the temperature sensing element 2 disposed inside the resin case 1 is supported only by the lead wire 4. Therefore, when the mold resin 6 flows into the resin case 1, the position of the temperature sensitive element 2 in the opening of the resin case 1 is not determined due to the influence of the flow of the mold resin 6.
- the lead wire 4 is covered with an insulating resin 7 in order to reinforce the lead wire 4 against the flow of the mold resin 6.
- the insulating resin 7 in order to reinforce the lead wire 4 strongly, the insulating resin 7 must be thickened. If the insulating resin 7 is thickened, the sensitivity of the temperature sensitive element 2 is lowered.
- the temperature sensing element 2 is positioned by the positioning pin 8.
- the positioning pin 8 it is necessary to form the jig hole 9 in the resin case 1, and it is difficult to reduce the size of the temperature sensor.
- FIG. 1 is a perspective view of the temperature sensor 10, and FIG. 2 is a cross-sectional view of the temperature sensor 10.
- FIG. 10 In the temperature sensor 10 of the present embodiment, a glass-sealed thermistor element is used as the temperature sensitive element 11.
- the temperature sensitive element 11 is embedded in a resin case 12.
- tip part (1st edge part) of case 12 is the temperature detection part 12a, and the temperature sensing element 11 is arrange
- a coupler portion 12b for external connection is formed at the rear end portion (second end portion) of the case 12, and a metal portion for electrical connection with the outside is formed inside the coupler portion 12b.
- a terminal 13 is arranged. A part of the terminal 13 is exposed from the case 12. Further, the temperature sensing element 11 and the terminal 13 are electrically connected by a lead wire 14.
- the temperature sensor of the present embodiment connects the temperature sensing element 11 disposed at the first end, the terminal 13 disposed at the second end, and the temperature sensing element 11 and the terminal 13.
- a detection body 15 having a lead wire 14 is included.
- the temperature sensor of the present embodiment further includes a first mold resin body 17 that covers the temperature sensitive element 11, a part of the terminal 13, and the lead wire 14. Furthermore, the temperature sensor of the present embodiment has a part of the terminal 13 exposed from the first mold resin body 17 and a second mold resin body 18 that covers the first mold resin body 17. The surface of the second mold resin body 18 on which the gate mark 20 is formed is directed toward the first end.
- the temperature sensing element 11 and the pair of terminals 13 are connected by lead wires 14 to form the detection body 15 (an example of the first step).
- the pair of lead wires 14 are inserted into the insulating tube 16 so as not to short-circuit each other.
- the first mold resin body 17 is molded, and the detection body 15 is molded.
- the first mold resin body 17 is molded such that a part of the terminal 13 is exposed from the first mold resin body 17. That is, the first mold resin body 17 covers the temperature sensing element 11, a part of the terminal 13, and the lead wire 14 (an example of the second step).
- the second mold resin body 18 is molded so that the surface of the first mold resin body 17 is covered.
- the second mold resin body 18 is molded so that the end of the terminal 13 is exposed from the first mold resin body 17.
- the second mold resin body 18 covers a part of the terminal 13 exposed from the first mold resin body 17 and the first mold resin body 17 (an example of a third step).
- the manufacturing method of the temperature sensor of the present embodiment includes a first step of forming a detection body by connecting the terminal 13 and the temperature sensitive element 11 with a lead wire. Furthermore, the manufacturing method of the temperature sensor according to the present embodiment includes a second step of molding the first mold resin body 17 that covers the temperature sensing element 11, a part of the terminal 13, and the lead wire 14. Furthermore, in the method of manufacturing the temperature sensor of the present embodiment, the second mold resin body 18 covering the part of the terminal 13 exposed from the first mold resin body 17 and the first mold resin body 17 is provided. Having a third step of shaping.
- the mold resin is moved along a first direction from the first end where the temperature sensing element 11 is disposed to the second end where the coupler 12b is disposed. Filled in the mold.
- the temperature sensor 10 is molded.
- the detection body 15 Since the detection body 15 is formed by connecting the terminal 13 and the temperature sensing element 11 with the lead wire 14, the strength of the detection body 15 before being molded with the first mold resin body 17 is low. Therefore, when the detection body 15 is molded with the first mold resin body 17, the position of the temperature sensitive element 11 becomes unstable in the molding die (not shown) due to the resin flow. In some cases, the thermosensitive element 11 is molded in contact with the surface of a molding die (not shown). In this case, the temperature sensitive element 11 is exposed on the surface of the first mold resin body 17.
- the surface of the first mold resin body 17 is covered with the second mold resin body 18. Therefore, even when the temperature sensing element 11 is exposed on the surface of the first mold resin body 17, it is not exposed from the second mold resin body 18, and the airtightness of the temperature sensing element 11 can be sufficiently secured.
- the detection body 15 in which the temperature sensing element 11 and the terminal 13 are connected by the lead wire 14 is covered with the first mold resin body 17, its rigidity is high. Therefore, in the third step in which the second mold resin body 18 is molded, the position variation of the detection body 15 due to the flow of the mold resin is suppressed.
- the detection body 15 is entirely covered with the first mold resin body 17 except the exposed portion of the terminal 13. If the resin of the temperature detection unit 12a where the temperature sensing element 11 is arranged is set thick, the heat capacity around the temperature sensing element 11 increases and the detection sensitivity of the temperature sensor 10 decreases. Therefore, the detection sensitivity of the temperature sensitive element 11 can be increased by thinning the resin of the temperature detection unit 12a.
- the flow variation of the mold resin can be reduced when the second mold resin body 18 is molded, and the position variation of the detection body 15 due to the flow of the mold resin is suppressed. The Therefore, the detection accuracy of the temperature sensor 10 can be further increased.
- the material of the first mold resin body 17 and the material of the second mold resin body 18 are the same PBT (polybutyl terephthalate), the first mold resin body 17 and the second mold resin are used in the molding process. The interface of the body 18 is welded. Therefore, airtightness can be increased at the interface between the first mold resin body 17 and the second mold resin body 18.
- FIG. 4 shows a state where the first mold resin body 17 has already been molded, and the detection body 15 is covered with the first mold resin body 17 except for a part of the terminal 13. .
- the molding die 19 has a gate 19a through which mold resin flows.
- the flow of the mold resin flowing from the gate 19a is indicated by an arrow inside the molding die 19.
- the mold resin has a first direction from the first end side where the temperature sensing element 11 is arranged (upper side in FIG. 4) toward the second end side where the terminal 13 is arranged (lower side in FIG. 4). Along the direction, the mold 19 is filled through the gate 19a. Since the end portion of the terminal 13 is not covered with the second mold resin body 18, the portion exposed from the second mold resin body 18 of the terminal 13 is sandwiched by the molding die 19.
- the mold resin body 18 is formed from the rear end side (lower side in FIG. 4) of the first mold resin body 17 supported by the molding die 19. Filled. Therefore, the position shift of the front-end
- positioned is suppressed. That is, the positional accuracy of the first mold resin body 17 having the temperature sensitive element 11 in the second mold resin body 18 can be increased. As a result, the temperature sensor 10 with high detection accuracy can be easily mass-produced.
- the pushing force is increased by the mold resin that wraps around below the first mold resin body 17. Will occur.
- the push-up force is a force that works in the direction in which the terminal 13 is removed from the molding die 19, that is, a force that pushes up the first mold resin body 17 toward the tip end side (upward in FIG. 4).
- the distance from the tip of the second mold resin body 18 (not shown in FIG. 4) to the temperature sensing element 11 is increased. Variations may occur and affect the detection accuracy of the temperature sensor 10.
- the mold resin flowing in from the front end side (upper side in FIG. 4) to the rear end side (lower side in FIG. 4) of the first mold resin body 17 acts as a force to push down the first mold resin body 17. work. Therefore, this pushing-down force can suppress the influence of the pushing-up force described above.
- the gate mark 20 generated when the second mold resin body 18 is molded is formed in the gate protrusion 21.
- the second inclined surface 18 a of the second mold resin body 18 is along the first inclined surface 17 a of the first mold resin body 17.
- the gate protrusion 21 is formed on the second inclined surface 18a, and the gate mark 20 is formed on the gate surface 19b.
- the flow of the mold resin flowing into the molding die 19 through the gate 19a from the tip end side (upper side in FIG. 4) hits the first inclined surface 17a.
- the pressing force described above can be obtained efficiently by the pressing force generated when the mold resin hits the first inclined surface 17a.
- the pressing force can be adjusted by adjusting the inclination of the first inclined surface 17a with respect to the gate mark 20.
- the shape of the molding die 19 is as follows.
- the angle formed by the gate 19a extending direction (first direction) and the gate 19a and the gate surface 19b is reduced. Therefore, a narrow angle portion is required for the molding die 19, and the strength of the narrow angle portion is reduced. Therefore, in consideration of the life of the molding die 19, it is desirable that the direction in which the gate 19a extends (first direction) and the gate surface 19b are perpendicular.
- a gate protrusion 21 protruding from the second inclined surface 18a is provided.
- a gate mark 20 is formed on the end surface of the gate protrusion 21. Therefore, as shown in FIG. 4, by providing the gate protrusion 21, the gate surface 19b is orthogonal to the direction (first direction) in which the gate 19a extends regardless of the inclination of the second inclined surface 18a. Can be made. Therefore, the durability of the molding die 19 for molding the second mold resin body can be enhanced.
- FIG. 5 is a plan view of the coupler portion 12b as viewed from the extending direction of the terminal 13.
- FIG. FIG. 6 is a partial cross-sectional view showing the hole 22 formed in the coupler portion 12 b of the first mold resin body 17.
- the terminal 13 is exposed from the second mold resin body 18.
- a protrusion 24 is formed on the inner periphery of the hole 22.
- FIG. 6 shows a state before the second mold resin body 18 is molded after the first mold resin body 17 is molded.
- the hole 22 is a hole that fits with a support pin 23 provided in the molding die 19 in order to support the first mold resin body 17 when the second mold resin body 18 is molded. That is, as described with reference to FIG. 4, in molding the second mold resin body 18, the terminal 13 is used as a molding die 19 as means for suppressing the pushing force applied to the first mold resin body 17.
- the structure sandwiched between the first mold resin body 17 and the effect of the mold resin flow on the first mold resin body 17 have been described.
- the diameter of the hole 22 is set to be offset so as to be larger than the diameter of the support pin 23, and a plurality of protrusions 24 that protrude partially inward are provided on the inner peripheral surface of the hole 22.
- the press-contact deformation portion of the protrusion 24 fits in the offset region between the support pin 23 and the hole 22. Therefore, it can prevent that a press-contact deformation part becomes an obstruction which obstructs insertion of the support pin 23, and can stabilize the length in which the support pin 23 is inserted.
- the protrusions in the hole 22 are formed in an annular shape along the circumferential direction of the inner peripheral surface of the hole 22, and it is desirable to provide a plurality of annular protrusions 24.
- the present invention has an effect of suppressing variation in detection accuracy in the temperature sensor, and is particularly effective in a temperature sensor for detecting an on-vehicle temperature.
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- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
<温度センサの構成>
以下、本発明の実施の形態について図面を参照しながら説明する。
次に、温度センサ10の製造方法について、図3A~図3Cを参照しながら説明する。
次に第2のモールド樹脂体18の成形方法について、図4を参照しながらさらに詳細に説明する。
次に、図1、図2、および図4を参照しながら、成形金型19のゲート19aおよび第2のモールド樹脂体18のゲート痕20の構成について説明する。
次に第1のモールド樹脂体17の好ましい穴の構成について図5および図6を参照しながら説明する。
11 感温素子
12b カプラ部
13 ターミナル
14 リード線
15 検出体
17 第1のモールド樹脂体
17a 第1の傾斜面
18 第2のモールド樹脂体
18a 第2の傾斜面
19 成形金型
19a ゲート
19b ゲート面
20 ゲート痕
21 ゲート突出部
22 穴
24 突起部
Claims (5)
- 第1の端部に配置された感温素子と、第2の端部に配置されたターミナルと、前記感温素子と前記ターミナルとを接続するリード線とを有する検出体と、
前記感温素子と、前記ターミナルの一部と、前記リード線とを覆う第1のモールド樹脂体と、
前記第1のモールド樹脂体から露出する前記ターミナルの一部と、前記第1のモールド樹脂体とを覆う第2のモールド樹脂体と、
を備え、
前記第2のモールド樹脂体のゲート痕が形成された面は、前記第1の端部の側に向かっている
ことを特徴とする温度センサ。 - 前記第1のモールド樹脂体は、前記第1の端部から前記第2の端部に向かって拡開する第1の傾斜面を有し、
前記第2のモールド樹脂体は前記第1の傾斜面に沿った第2の傾斜面と、
前記第2の傾斜面から前記第1の端部に向かって突出するゲート突出部を有し、
前記突出部に前記ゲート痕が形成される
ことを特徴とする請求項1に記載の温度センサ。 - 前記第1のモールド樹脂体の前記第2の端部に向いている面に穴が設けられ、
前記第1のモールド樹脂体の前記穴の内周面に突起部が設けられた
ことを特徴とする請求項2に記載の温度センサ。 - 前記突起部は前記穴の前記内周面に沿った環状である
ことを特徴とする請求項3に記載の温度センサ。 - ターミナルと感温素子とをリード線で接続して検出体を形成する第1のステップと、
前記感温素子と、前記ターミナルの一部と、前記リード線とを覆う第1のモールド樹脂体を成形する第2のステップと、
前記第1のモールド樹脂体から露出する前記ターミナルの一部と、前記第1のモールド樹脂体とを覆う第2のモールド樹脂体を成形する第3のステップと
を備え、
前記第3のステップにおいて、モールド樹脂は、前記感温素子が配置されている第1の端部からカプラ部が配置されている第2の端部に向かう第1の方向に沿って、前記成形金型に充填される
ことを特徴とする温度センサの製造方法。
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JP2015542512A JP6467637B2 (ja) | 2013-10-15 | 2014-09-18 | 温度センサおよびその製造方法 |
US15/022,924 US10126179B2 (en) | 2013-10-15 | 2014-09-18 | Temperature sensor and manufacturing method therefor |
CN201480056564.5A CN105705924B (zh) | 2013-10-15 | 2014-09-18 | 温度传感器及其制造方法 |
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JP2013-214489 | 2013-10-15 | ||
JP2013214489 | 2013-10-15 |
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WO2015056404A1 true WO2015056404A1 (ja) | 2015-04-23 |
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US (1) | US10126179B2 (ja) |
JP (1) | JP6467637B2 (ja) |
CN (1) | CN105705924B (ja) |
WO (1) | WO2015056404A1 (ja) |
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JP6281820B2 (ja) * | 2014-04-14 | 2018-02-21 | パナソニックIpマネジメント株式会社 | 充電コネクタ |
TWI716447B (zh) | 2016-09-12 | 2021-01-21 | 揚明光學股份有限公司 | 溫度偵測裝置 |
FR3058517B1 (fr) * | 2016-11-10 | 2019-01-25 | Sc2N | Procede de fabrication d'un capteur pour vehicule automobile |
WO2018131164A1 (ja) * | 2017-01-16 | 2018-07-19 | 株式会社芝浦電子 | 温度センサ |
CN108885143A (zh) | 2017-02-09 | 2018-11-23 | 株式会社芝浦电子 | 温度传感器 |
JP7099884B2 (ja) * | 2018-06-18 | 2022-07-12 | 矢崎総業株式会社 | 油温センサ |
JP2019219201A (ja) * | 2018-06-18 | 2019-12-26 | 矢崎総業株式会社 | センサ本体およびセンサ本体の製造方法 |
JP7044643B2 (ja) * | 2018-06-18 | 2022-03-30 | 矢崎総業株式会社 | 油温センサ |
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JP2010008366A (ja) * | 2008-06-30 | 2010-01-14 | Mitsubishi Cable Ind Ltd | 温度センサ及びその製造方法 |
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JPS6333632A (ja) * | 1986-07-28 | 1988-02-13 | Sanyo Electric Co Ltd | 温度検出器の製造方法 |
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JPH10300589A (ja) | 1997-04-30 | 1998-11-13 | Matsushita Electric Ind Co Ltd | サーミスタ式水温センサの製造方法 |
JP3458727B2 (ja) | 1998-10-30 | 2003-10-20 | 松下電器産業株式会社 | カラー陰極線管 |
JP2000321147A (ja) * | 1999-05-13 | 2000-11-24 | Denso Corp | 温度検出センサの製造方法 |
DE10156753A1 (de) * | 2001-11-19 | 2003-06-05 | Epcos Ag | Meßfühler und Meßfühleranordnung |
JP2004198240A (ja) * | 2002-12-18 | 2004-07-15 | Denso Corp | センサ装置 |
JP4455839B2 (ja) * | 2003-06-25 | 2010-04-21 | Tdk株式会社 | 温度センサの製造方法 |
TWI271013B (en) * | 2003-10-15 | 2007-01-11 | Sanyo Electric Co | Semiconductor laser apparatus |
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2014
- 2014-09-18 JP JP2015542512A patent/JP6467637B2/ja active Active
- 2014-09-18 CN CN201480056564.5A patent/CN105705924B/zh active Active
- 2014-09-18 US US15/022,924 patent/US10126179B2/en active Active
- 2014-09-18 WO PCT/JP2014/004806 patent/WO2015056404A1/ja active Application Filing
Patent Citations (3)
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JPH08159881A (ja) * | 1994-12-05 | 1996-06-21 | Nippondenso Co Ltd | 温度検出装置およびその製造方法 |
JPH08327464A (ja) * | 1995-06-02 | 1996-12-13 | Mitsubishi Electric Corp | 流体の温度センサの製造方法 |
JP2010008366A (ja) * | 2008-06-30 | 2010-01-14 | Mitsubishi Cable Ind Ltd | 温度センサ及びその製造方法 |
Also Published As
Publication number | Publication date |
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CN105705924B (zh) | 2018-09-11 |
US10126179B2 (en) | 2018-11-13 |
US20160209277A1 (en) | 2016-07-21 |
CN105705924A (zh) | 2016-06-22 |
JPWO2015056404A1 (ja) | 2017-03-09 |
JP6467637B2 (ja) | 2019-02-13 |
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