JP2004245782A - Pressure detection device - Google Patents

Pressure detection device Download PDF

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Publication number
JP2004245782A
JP2004245782A JP2003038231A JP2003038231A JP2004245782A JP 2004245782 A JP2004245782 A JP 2004245782A JP 2003038231 A JP2003038231 A JP 2003038231A JP 2003038231 A JP2003038231 A JP 2003038231A JP 2004245782 A JP2004245782 A JP 2004245782A
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Japan
Prior art keywords
pressure
housing
sensitive element
connector
base
Prior art date
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JP2003038231A
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Japanese (ja)
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JP4085834B2 (en
Inventor
Teruo Oda
輝夫 小田
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Denso Corp
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Denso Corp
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Publication date
Application filed by Denso Corp filed Critical Denso Corp
Priority to JP2003038231A priority Critical patent/JP4085834B2/en
Priority to DE102004007202.7A priority patent/DE102004007202B4/en
Priority to CNB2004100041629A priority patent/CN1247974C/en
Priority to US10/778,135 priority patent/US6962085B2/en
Priority to KR1020040010482A priority patent/KR100562862B1/en
Publication of JP2004245782A publication Critical patent/JP2004245782A/en
Application granted granted Critical
Publication of JP4085834B2 publication Critical patent/JP4085834B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure detection device having a configuration suitable for thinning a housing. <P>SOLUTION: This pressure detection device comprises the housing installable on a detected body for which a pressure is detected, a pressure sensing element 20 stored in the housing 10 and outputting signals according to the pressure, a rod 30 installed in the housing on one end 11 side of the housing 10 than the pressure sensing element 20 and transmitting the pressure to the pressure sensing element 20, a connector part 40 installed on the other end 12 side of the housing 10 and taking out signals from the pressure sensing element 20, and a connection member installed in the housing 10 between the pressure sensing element 20 and the connector part 40 and electrically connecting the pressure sensing element 20 to the connector part 40. The connection member is formed in a three dimensional solid wiring member 50 having a base part 51 and a laminar wiring part 52 formed on the surface of the base part 51 ranging from the pressure sensing element side terminal part 51a of the base part 51 to the connector part side end part 51b thereof. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、圧力が検出される被検出体に取付可能なハウジング内に、感圧素子と該感圧素子に圧力を伝達する圧力伝達部材とを収納してなる圧力検出装置に関する。
【0002】
【従来の技術】
従来、この種の圧力検出装置としては、圧力が検出される被検出体に取付可能なハウジングと、ハウジングに収納され圧力に応じた信号を出力する感圧素子と、ハウジング内にて感圧素子よりもハウジングの一端側に設けられ感圧素子に圧力を伝達する圧力伝達部材と、ハウジングの他端側に設けられ感圧素子からの信号を取り出すためのコネクタ部とを備えたものが提案されている(例えば、特許文献1参照)。
【0003】
このものでは、ハウジング内にて感圧素子とコネクタ部との間には、感圧素子とコネクタ部とを電気的に接続する接続部材を設けている。この接続部材としては、従来では、複数本のターミナルを例えばハーメチック部材等にて保持してなるターミナルアッシーが用いられている。
【0004】
このターミナルアッシーにおいては、コネクタ部側ではターミナルとコネクタピンとを溶接等にて接続し、感圧素子側ではターミナルと感圧素子とをワイヤボンディング等にて接続した構成としている。
【0005】
【特許文献1】
特開平7−253374号公報
【0006】
【発明が解決しようとする課題】
ところで、例えば、このような圧力検出装置をエンジンの燃焼圧センサに適用する場合、ハウジングにおける圧力伝達部材の収納部をエンジンブロックの穴に挿入し、燃焼室内の圧力を圧力伝達部材で受圧して検出する。
【0007】
ここで、エンジンに対しては、小型化や軽量化の要望があり、圧力検出装置の搭載スペースも小さくする必要がある。そのため、圧力検出装置においては細径化すなわちハウジングの細径化が望まれている。
【0008】
それに対して、従来の圧力検出装置においては、ハウジングの径は、ハウジング収納部品のうち最大寸法を有するターミナルアッシーのサイズによって決められる。しかしながら、上述したターミナルアッシーでは、ターミナル自身の太さの公差やターミナル間の位置決め公差、さらにはハーメチック部材のサイズの公差等、複数の公差がある。
【0009】
そこで、ハウジングの径は、これら複数のターミナルアッシーの公差が最大方向へずれても良いように、大きめに設計する必要がある。言い換えれば、複数個の公差のずれを許容するだけの太さを有するハウジングが必要となり、細径化に制約が生じていた。
【0010】
そこで、本発明は上記問題に鑑み、ハウジングを細くするのに適切な構成を有する圧力検出装置を提供することを目的とする。
【0011】
【課題を解決するための手段】
上記目的を達成するため、請求項1に記載の発明では、圧力が検出される被検出体に取付可能なハウジング(10)と、ハウジングに収納され圧力に応じた信号を出力する感圧素子(20)と、ハウジング内にて感圧素子よりもハウジングの一端側に設けられ感圧素子に圧力を伝達する圧力伝達部材(30)と、ハウジングの他端側に設けられ感圧素子からの信号を取り出すためのコネクタ部(40)と、ハウジング内にて感圧素子とコネクタ部との間に設けられ感圧素子とコネクタ部とを電気的に接続する接続部材(50)とを備える圧力検出装置において、接続部材は、基部(51)と基部における感圧素子側の端部(51a)からコネクタ部側の端部(51b)に渡って基部の表面に形成された層状の配線部(52)とを有する3次元立体配線部材であることを特徴とする。
【0012】
それによれば、接続部材である3次元立体配線部材のサイズは、その基部の大きさで決まるので、3次元立体配線部材を収納するハウジングのサイズを決める場合には、実質的に3次元立体配線部材の基部の公差のみを考慮すればよい。そのため、従来のターミナルアッシーを用いた場合のように複数の公差を考慮してハウジングの径を決める必要がなくなる。
【0013】
よって、本発明によれば、ハウジングを細くするのに適切な構成を有する圧力検出装置を提供することができる。
【0014】
なお、上記各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示す一例である。
【0015】
【発明の実施の形態】
以下、本発明を図に示す実施形態について説明する。図1は本発明の実施形態に係る圧力検出装置S1の概略断面構成を示す図であり、図2は図1中に示されている3次元立体配線部材50の単体斜視図である。限定するものではないが、この圧力検出装置S1は、被検出体であるエンジンの燃焼室内の圧力(燃焼圧)を検出する燃焼圧センサとして適用できる。
【0016】
この圧力検出装置S1は、大きくは、圧力が検出される被検出体に取付可能なハウジング10と、ハウジング10に収納され圧力に応じた信号を出力する感圧素子20と、ハウジング10内にて感圧素子20よりもハウジング10の一端11側に設けられ感圧素子20に圧力を伝達する圧力伝達部材としてのロッド30と、ハウジング10の他端12側に設けられ感圧素子20からの信号を取り出すためのコネクタ部40とを備えている。
【0017】
さらに、ハウジング10内にて感圧素子20とコネクタ部40との間には、感圧素子20とコネクタ部40とを電気的に接続するための接続部材としての3次元立体配線部材50が設けられている。
【0018】
ハウジング10は、例えばステンレス等の金属からなる筒状のものである。このハウジング10の一端11側には、受圧部としての金属からなるダイアフラム15が溶接等にて取り付けられている。このダイアフラム15は、圧力を受けることにより歪むものである。
【0019】
例えば、圧力検出装置S1を上記燃焼圧センサに適用する場合には、このハウジング10の一端11側すなわちダイアフラム15側が燃焼室に露出するように、エンジンブロックの穴に挿入される。このとき、例えばハウジング10の外周面にねじを形成し、エンジンブロックの穴とハウジング10とネジ結合することで、圧力検出装置の取付が行われる。
【0020】
また、ハウジング10の一端11側には、ハウジング10内にステンレス等の金属からなる棒状のロッド30が収納されている。このロッド30の一端31側は、ダイアフラム15に接して配置されている。そして、図1中の白抜き矢印に示すように、ロッド30の一端11にはダイアフラム15を介して、測定圧力が印加されるようになっている。
【0021】
感圧素子20は、ハウジング10内にてロッド30よりもハウジング10の他端12側の部位に収納されている。この感圧素子20は、印加された圧力に応じた信号を出力するものであれば特に限定されないが、例えば、半導体基板にゲージ抵抗を形成したものを用いることができる。具体的には、シリコン基板にゲージ抵抗として拡散抵抗を形成し、この拡散抵抗によってブリッジ回路を形成したものを採用することができる。
【0022】
そして、この感圧素子20には、ガラスからなる介在部材21が陽極接合等にて接合され、その介在部材21の上には炭素鋼等の鋼材からなる半球22が接着等にて接合され、感圧素子20、介在部材21および半球22は一体化されている。
【0023】
そして、半球22の曲面とロッド30の他端32とが接して配置されており、ロッド30からの圧力は、半球22、介在部材21を介して感圧素子20へ伝達されるようになっている。
【0024】
また、接続部材としての3次元立体配線部材50は、図1、図2に示すように、基部51と基部51における感圧素子20側の端部51aからコネクタ部40側の端部51bに渡って基部51の表面に形成された層状の配線部52とを有する。
【0025】
ここで、基部51は、LCP(液晶ポリマー)等の硬い樹脂等からなり、配線部52は銅や金等の膜から形成することができる。このような3次元立体配線部材50は、例えば、成形された基部51に対して、配線部52を形成する部位以外の部位にレジスト等にてマスキングを施し、銅や金等のメッキを行うことにより製造することができる。
【0026】
図示例では、基部51は円柱形状であり、一方の端面が感圧素子20側の端部51a、他方の端面がコネクタ部40側の端部51bとなっている。なお、図2には、基部51における感圧素子20側の端部51aにおいて、感圧素子20の搭載領域20aを破線にて示してある。
【0027】
本例では、基部51の側面に、両端面51a、51bを結ぶように溝51cが形成されている。そして、配線部52は、基部51における感圧素子20側の端部51aから溝51cの内表面を通り、コネクタ部40側の端部51bに渡って形成されている。
【0028】
これにより、配線部52は、基部51における一方の端面51aから他方の端面51bへ引き回された形となる。なお、基部51に貫通穴を形成し、その貫通穴の内表面に配線部52を形成することで、配線部52の引き回しを行っても良い。
【0029】
そして、感圧素子20は、3次元立体配線部材50の基部51における感圧素子20の搭載領域20aに搭載され、接着等にて固定されている。さらに、感圧素子20は、基部51の感圧素子20側の端部51aにて金やアルミ等のボンディングワイヤ24を介して配線部52と結線され、電気的に接続されている。
【0030】
また、図1に示すように、3次元立体配線部材50における基部51のコネクタ部40側の端部51bは、その端面の一部が突出しており、この突出部がコネクタ部40に接している。
【0031】
コネクタ部40は、PPS(ポリフェニレンサルファイド)等からなるコネクタプラグ41にターミナル42およびプレート43をインサート成形にて一体化させたものである。このコネクタ部40を外部の配線部材に結合することにより、圧力検出装置S1の信号を外部へ取り出すことが可能となる。
【0032】
ターミナル42は銅等からなり、プレート43はステンレス等の金属からなる。プレート43は、3次元立体配線部材50の基部51における上記突出部と接する部位であり、3次元立体配線部材50を支持するものである。このプレート43により、感圧素子20にロッドから圧力が印加されたときに感圧素子20および3次元立体配線部材50を受け止める役割が果たされる。
【0033】
そして、ターミナル42の一端側は、プレート43に形成された穴から3次元立体配線部材50側へ露出し、ターミナル42の他端側はコネクタプラグ41の開口部41a内に露出している。ターミナル42の一端側は、ターミナル42自身の弾性力を利用する等により、3次元立体配線部材50における配線部52と接して電気的に接続されている。
【0034】
また、ターミナル42の他端側は、外部配線部材等と接続される部分である。また、コネクタ部40とハウジング10との接合は、プレート43とハウジング10とを溶接したりやかしめたりする等により行われている。
【0035】
こうして、感圧素子20とコネクタ部40のターミナル42とは、3次元立体配線部材50の配線部52を介して電気的に接続されている。
【0036】
このような圧力検出装置S1は、例えば、次のようにして作ることができる。3次元立体配線部材50に対して、介在部材21および半球22が一体化された感圧素子20を搭載し、ワイヤボンディングを行って感圧素子20と配線部52とを結線する。
【0037】
続いて、このものをロッド30が挿入されたハウジング10内へ挿入し、さらにコネクタ部40を取り付けて、荷重を加えながら、ハウジング10とコネクタ部40のプレート43とを溶接やかしめ等により接合する。こうして、圧力検出装置S1を製造することができる。
【0038】
この圧力検出装置S1は、燃焼圧センサに適用される場合、上述したように、ダイアフラム15側が燃焼室に露出するように、エンジンブロックの穴に挿入されて取り付けられる。
【0039】
その状態にて、ダイアフラム15に燃焼圧が印加されると、ダイアフラム15が歪んでロッド30がその長手方向に変位する。それによって、燃焼圧はロッド30、半球22、介在部材21を介して感圧素子20に印加される。
【0040】
そして、感圧素子20では、印加された圧力に応じた信号が出力され、その信号は、ボンディングワイヤ24から、3次元立体配線部材50の配線部52、ターミナル42を介して外部へ取り出される。こうして、燃焼圧の検出が行われる。
【0041】
ところで、本実施形態によれば、ハウジング10内にて感圧素子20とコネクタ部40との間に設けられる接続部材として、基部51と基部51における感圧素子20側の端部51aからコネクタ部40側の端部51bに渡って基部51の表面に形成された層状の配線部52とを有する3次元立体配線部材50を採用している。
【0042】
このような構成を有する3次元立体配線部材50のサイズは、その基部51の大きさで決まるので、3次元立体配線部材50を収納するハウジング10のサイズを決める場合には、実質的に3次元立体配線部材50の基部51の公差のみを考慮すればよい。そのため、従来のターミナルアッシーを用いた場合ように複数の公差を考慮してハウジング10の径を決める必要がなくなる。
【0043】
こうして、本実施形態によれば、ハウジング10を細くするのに適切な構成を有する圧力検出装置S1を提供することができる。
【0044】
なお、本発明は、細径化を図るために3次元立体配線部材を接続部材に用いたことを要部とするものであり、圧力検出装置においてその他の部分は、適宜設計変更しても良い。
【図面の簡単な説明】
【図1】本発明の実施形態に係る圧力検出装置の概略断面図である。
【図2】図1中に示されている3次元立体配線部材の単体斜視図である。
【符号の説明】
10…ハウジング、20…感圧素子、30…圧力伝達部材としてのロッド、
40…コネクタ部、50…3次元立体配線部材、51…基部、
51a…基部における感圧素子側の端部、
51b…基部におけるコネクタ部側の端部、52…配線部。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pressure detecting device including a pressure-sensitive element and a pressure transmitting member for transmitting pressure to the pressure-sensitive element in a housing that can be attached to a detection target from which pressure is detected.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a pressure detecting device of this type, a housing that can be attached to a detection target from which pressure is detected, a pressure-sensitive element that is housed in the housing and outputs a signal corresponding to the pressure, And a connector provided at one end of the housing for transmitting pressure to the pressure-sensitive element, and a connector provided at the other end of the housing for extracting a signal from the pressure-sensitive element. (For example, see Patent Document 1).
[0003]
In this case, a connection member for electrically connecting the pressure-sensitive element and the connector is provided between the pressure-sensitive element and the connector in the housing. Conventionally, a terminal assembly that holds a plurality of terminals with a hermetic member or the like is used as the connection member.
[0004]
In this terminal assembly, the terminal and the connector pin are connected by welding or the like on the connector side, and the terminal and the pressure-sensitive element are connected on the pressure-sensitive element side by wire bonding or the like.
[0005]
[Patent Document 1]
JP-A-7-253374
[Problems to be solved by the invention]
By the way, for example, when such a pressure detecting device is applied to a combustion pressure sensor of an engine, a housing portion of a pressure transmitting member in a housing is inserted into a hole of an engine block, and a pressure in a combustion chamber is received by the pressure transmitting member. To detect.
[0007]
Here, there is a demand for miniaturization and weight reduction of the engine, and it is necessary to reduce the mounting space of the pressure detecting device. Therefore, it is desired to reduce the diameter of the pressure detecting device, that is, to reduce the diameter of the housing.
[0008]
On the other hand, in the conventional pressure detecting device, the diameter of the housing is determined by the size of the terminal assembly having the largest dimension among the housing storage components. However, in the terminal assembly described above, there are a plurality of tolerances such as a thickness tolerance of the terminal itself, a positioning tolerance between the terminals, and a hermetic member size tolerance.
[0009]
Therefore, the diameter of the housing needs to be designed to be large so that the tolerance of the plurality of terminal assemblies may be shifted in the maximum direction. In other words, a housing having a thickness sufficient to allow a plurality of deviations in tolerance is required, and a reduction in diameter has been restricted.
[0010]
In view of the above problems, an object of the present invention is to provide a pressure detecting device having a configuration suitable for making a housing thin.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a housing (10) attachable to an object to be detected of pressure, and a pressure-sensitive element housed in the housing and outputting a signal corresponding to the pressure ( 20), a pressure transmitting member (30) provided in the housing at one end of the housing relative to the pressure-sensitive element and transmitting pressure to the pressure-sensitive element, and a signal from the pressure-sensitive element provided at the other end of the housing. And a connector (50) provided between the pressure-sensitive element and the connector in the housing for electrically connecting the pressure-sensitive element to the connector. In the device, the connecting member includes a base (51) and a layered wiring portion (52) formed on the surface of the base from the end (51a) on the pressure-sensitive element side to the end (51b) on the connector side of the base. 3D with Characterized in that it is a body wiring member.
[0012]
According to this, the size of the three-dimensional three-dimensional wiring member as the connection member is determined by the size of the base portion. Therefore, when determining the size of the housing that houses the three-dimensional three-dimensional wiring member, substantially the three-dimensional three-dimensional wiring member is used. Only the tolerance of the base of the member needs to be considered. Therefore, it is not necessary to determine the diameter of the housing in consideration of a plurality of tolerances as in the case where a conventional terminal assembly is used.
[0013]
Therefore, according to the present invention, it is possible to provide a pressure detecting device having a configuration suitable for making the housing thin.
[0014]
It should be noted that reference numerals in parentheses of the above-described units are examples showing the correspondence with specific units described in the embodiments described later.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described. FIG. 1 is a diagram showing a schematic sectional configuration of a pressure detecting device S1 according to an embodiment of the present invention, and FIG. 2 is a single perspective view of a three-dimensional wiring member 50 shown in FIG. Although not limited, the pressure detecting device S1 can be applied as a combustion pressure sensor that detects a pressure (combustion pressure) in a combustion chamber of an engine that is an object to be detected.
[0016]
The pressure detecting device S1 is mainly composed of a housing 10 that can be attached to a detection target whose pressure is to be detected, a pressure-sensitive element 20 that is housed in the housing 10 and outputs a signal corresponding to the pressure, and A rod 30 provided on one end 11 side of the housing 10 with respect to the pressure-sensitive element 20 and transmitting pressure to the pressure-sensitive element 20, and a signal from the pressure-sensitive element 20 provided on the other end 12 of the housing 10 And a connector portion 40 for taking out the connector.
[0017]
Further, a three-dimensional wiring member 50 is provided between the pressure-sensitive element 20 and the connector section 40 in the housing 10 as a connection member for electrically connecting the pressure-sensitive element 20 and the connector section 40. Have been.
[0018]
The housing 10 has a cylindrical shape made of a metal such as stainless steel. A diaphragm 15 made of a metal as a pressure receiving portion is attached to one end 11 of the housing 10 by welding or the like. The diaphragm 15 is distorted by receiving pressure.
[0019]
For example, when the pressure detecting device S1 is applied to the combustion pressure sensor, the housing 10 is inserted into a hole of the engine block such that one end 11 side of the housing 10, that is, the diaphragm 15 side is exposed to the combustion chamber. At this time, for example, a screw is formed on the outer peripheral surface of the housing 10 and the hole of the engine block is screw-coupled to the housing 10 to mount the pressure detecting device.
[0020]
A rod-shaped rod 30 made of metal such as stainless steel is housed in the housing 10 at one end 11 side of the housing 10. One end 31 of the rod 30 is disposed in contact with the diaphragm 15. As shown by a white arrow in FIG. 1, a measurement pressure is applied to one end 11 of the rod 30 via the diaphragm 15.
[0021]
The pressure-sensitive element 20 is housed in the housing 10 at a position closer to the other end 12 of the housing 10 than the rod 30. The pressure-sensitive element 20 is not particularly limited as long as it outputs a signal corresponding to the applied pressure. For example, an element in which a gauge resistance is formed on a semiconductor substrate can be used. Specifically, it is possible to adopt a device in which a diffused resistor is formed as a gauge resistor on a silicon substrate, and a bridge circuit is formed by the diffused resistor.
[0022]
An intervening member 21 made of glass is joined to the pressure-sensitive element 20 by anodic bonding or the like, and a hemisphere 22 made of a steel material such as carbon steel is joined on the intervening member 21 by bonding or the like. The pressure-sensitive element 20, the interposition member 21, and the hemisphere 22 are integrated.
[0023]
The curved surface of the hemisphere 22 and the other end 32 of the rod 30 are disposed in contact with each other, and the pressure from the rod 30 is transmitted to the pressure-sensitive element 20 via the hemisphere 22 and the interposed member 21. I have.
[0024]
As shown in FIGS. 1 and 2, the three-dimensional wiring member 50 as a connecting member extends from the base 51 and the end 51 a of the base 51 on the pressure-sensitive element 20 side to the end 51 b of the connector 40 on the side of the connector 40. And a layered wiring portion 52 formed on the surface of the base portion 51.
[0025]
Here, the base portion 51 is made of a hard resin such as LCP (liquid crystal polymer) or the like, and the wiring portion 52 can be formed of a film such as copper or gold. In such a three-dimensional wiring member 50, for example, a portion other than the portion where the wiring portion 52 is formed is masked with a resist or the like on the molded base portion 51 and plated with copper or gold. Can be manufactured.
[0026]
In the illustrated example, the base 51 has a cylindrical shape, and one end surface is an end portion 51a on the pressure-sensitive element 20 side and the other end surface is an end portion 51b on the connector portion 40 side. In FIG. 2, the mounting area 20a of the pressure-sensitive element 20 is indicated by a broken line at an end 51a of the base 51 on the pressure-sensitive element 20 side.
[0027]
In this example, a groove 51c is formed on the side surface of the base 51 so as to connect both end surfaces 51a and 51b. The wiring portion 52 is formed from the end 51a of the base 51 on the pressure-sensitive element 20 side to the end 51b of the connector portion 40 through the inner surface of the groove 51c.
[0028]
As a result, the wiring portion 52 has a shape in which the wiring portion 52 is routed from one end surface 51a of the base portion 51 to the other end surface 51b. Note that the wiring portion 52 may be routed by forming a through hole in the base portion 51 and forming the wiring portion 52 on the inner surface of the through hole.
[0029]
The pressure-sensitive element 20 is mounted on the mounting area 20a of the pressure-sensitive element 20 in the base 51 of the three-dimensional three-dimensional wiring member 50, and is fixed by bonding or the like. Further, the pressure-sensitive element 20 is connected to a wiring portion 52 via a bonding wire 24 of gold, aluminum, or the like at an end 51a of the base 51 on the pressure-sensitive element 20 side, and is electrically connected.
[0030]
As shown in FIG. 1, an end 51 b of the base 51 of the three-dimensional three-dimensional wiring member 50 on the connector part 40 side has a part of the end face protruding, and this protruding part is in contact with the connector part 40. .
[0031]
The connector part 40 is obtained by integrating a terminal 42 and a plate 43 with a connector plug 41 made of PPS (polyphenylene sulfide) or the like by insert molding. By connecting the connector section 40 to an external wiring member, it is possible to take out the signal of the pressure detecting device S1 to the outside.
[0032]
The terminal 42 is made of copper or the like, and the plate 43 is made of metal such as stainless steel. The plate 43 is a portion of the base portion 51 of the three-dimensional wiring member 50 that is in contact with the protruding portion, and supports the three-dimensional wiring member 50. The plate 43 serves to receive the pressure-sensitive element 20 and the three-dimensional wiring member 50 when pressure is applied to the pressure-sensitive element 20 from a rod.
[0033]
One end of the terminal 42 is exposed from the hole formed in the plate 43 toward the three-dimensional wiring member 50, and the other end of the terminal 42 is exposed inside the opening 41 a of the connector plug 41. One end of the terminal 42 is in contact with and electrically connected to the wiring portion 52 of the three-dimensional wiring member 50 by utilizing the elastic force of the terminal 42 itself.
[0034]
The other end of the terminal 42 is a portion connected to an external wiring member or the like. The connection between the connector part 40 and the housing 10 is performed by welding or swaging the plate 43 and the housing 10.
[0035]
Thus, the pressure-sensitive element 20 and the terminal 42 of the connector section 40 are electrically connected via the wiring section 52 of the three-dimensional wiring member 50.
[0036]
Such a pressure detecting device S1 can be manufactured, for example, as follows. The pressure-sensitive element 20 in which the intervening member 21 and the hemisphere 22 are integrated is mounted on the three-dimensional wiring member 50, and the pressure-sensitive element 20 and the wiring section 52 are connected by wire bonding.
[0037]
Subsequently, this is inserted into the housing 10 into which the rod 30 has been inserted, and further, the connector portion 40 is attached, and the housing 10 and the plate 43 of the connector portion 40 are joined by welding, caulking, or the like while applying a load. . Thus, the pressure detecting device S1 can be manufactured.
[0038]
When applied to a combustion pressure sensor, the pressure detecting device S1 is inserted and mounted in a hole of an engine block so that the diaphragm 15 is exposed to the combustion chamber, as described above.
[0039]
In this state, when a combustion pressure is applied to the diaphragm 15, the diaphragm 15 is distorted and the rod 30 is displaced in the longitudinal direction. Thereby, the combustion pressure is applied to the pressure-sensitive element 20 via the rod 30, the hemisphere 22, and the interposition member 21.
[0040]
The pressure-sensitive element 20 outputs a signal corresponding to the applied pressure, and the signal is extracted from the bonding wire 24 to the outside via the wiring section 52 of the three-dimensional wiring member 50 and the terminal 42. Thus, the detection of the combustion pressure is performed.
[0041]
By the way, according to the present embodiment, as the connection member provided between the pressure-sensitive element 20 and the connector section 40 in the housing 10, the base 51 and the end 51 a of the base 51 on the pressure-sensitive element 20 side are connected to the connector section. A three-dimensional wiring member 50 having a layered wiring portion 52 formed on the surface of the base 51 over the end 51b on the 40 side is employed.
[0042]
Since the size of the three-dimensional wiring member 50 having such a configuration is determined by the size of the base 51, when determining the size of the housing 10 that houses the three-dimensional wiring member 50, the three-dimensional wiring member 50 is substantially three-dimensional. Only the tolerance of the base 51 of the three-dimensional wiring member 50 needs to be considered. Therefore, it is not necessary to determine the diameter of the housing 10 in consideration of a plurality of tolerances as in the case of using a conventional terminal assembly.
[0043]
Thus, according to the present embodiment, it is possible to provide the pressure detecting device S1 having an appropriate configuration for making the housing 10 thin.
[0044]
In the present invention, a three-dimensional wiring member is used as a connection member in order to reduce the diameter, and other parts of the pressure detection device may be appropriately designed and changed. .
[Brief description of the drawings]
FIG. 1 is a schematic sectional view of a pressure detecting device according to an embodiment of the present invention.
FIG. 2 is a single perspective view of the three-dimensional wiring member shown in FIG. 1;
[Explanation of symbols]
10: housing, 20: pressure-sensitive element, 30: rod as pressure transmitting member,
40 ... connector part, 50 ... three-dimensional three-dimensional wiring member, 51 ... base part,
51a ... the end on the pressure-sensitive element side at the base,
51b: end portion of the base portion on the connector side, 52: wiring portion.

Claims (1)

圧力が検出される被検出体に取付可能なハウジング(10)と、
前記ハウジングに収納され、圧力に応じた信号を出力する感圧素子(20)と、
前記ハウジング内にて前記感圧素子よりも前記ハウジングの一端側に設けられ、前記感圧素子に圧力を伝達する圧力伝達部材(30)と、
前記ハウジングの他端側に設けられ、前記感圧素子からの信号を取り出すためのコネクタ部(40)と、
前記ハウジング内にて前記感圧素子と前記コネクタ部との間に設けられ、前記感圧素子と前記コネクタ部とを電気的に接続する接続部材(50)とを備える圧力検出装置において、
前記接続部材は、基部(51)と前記基部における前記感圧素子側の端部(51a)から前記コネクタ部側の端部(51b)に渡って前記基部の表面に形成された層状の配線部(52)とを有する3次元立体配線部材であることを特徴とする圧力検出装置。
A housing (10) that can be attached to a detection target from which pressure is detected;
A pressure-sensitive element (20) housed in the housing and outputting a signal corresponding to pressure;
A pressure transmitting member (30) provided in the housing at one end side of the housing relative to the pressure-sensitive element and transmitting pressure to the pressure-sensitive element;
A connector section (40) provided on the other end side of the housing and for extracting a signal from the pressure-sensitive element;
A pressure detection device provided between the pressure-sensitive element and the connector portion in the housing, the connection member (50) electrically connecting the pressure-sensitive element and the connector portion;
The connection member includes a base (51) and a layered wiring portion formed on a surface of the base from an end (51a) on the pressure-sensitive element side to an end (51b) on the connector side of the base. (52) A pressure detecting device characterized by being a three-dimensional three-dimensional wiring member having:
JP2003038231A 2003-02-17 2003-02-17 Pressure detection device Expired - Fee Related JP4085834B2 (en)

Priority Applications (5)

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JP2003038231A JP4085834B2 (en) 2003-02-17 2003-02-17 Pressure detection device
DE102004007202.7A DE102004007202B4 (en) 2003-02-17 2004-02-13 Pressure detector with elongated housing for receiving a pressure-sensitive element
CNB2004100041629A CN1247974C (en) 2003-02-17 2004-02-13 Pressure detector having elongate housing containing pressure-sensitive element therein
US10/778,135 US6962085B2 (en) 2003-02-17 2004-02-17 Pressure detector having elongate housing containing pressure-sensitive element therein
KR1020040010482A KR100562862B1 (en) 2003-02-17 2004-02-17 Pressure detector having elongate housing containing pressure-sensitive element therein

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006194736A (en) * 2005-01-13 2006-07-27 Denso Corp Pressure detection device and its manufacturing method
JP2010091389A (en) * 2008-10-07 2010-04-22 Nippon Soken Inc Cylinder pressure sensor
JPWO2016181449A1 (en) * 2015-05-11 2017-12-28 理化工業株式会社 Pressure sensor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6437636U (en) * 1987-08-28 1989-03-07
JPH07253374A (en) * 1994-03-14 1995-10-03 Nippondenso Co Ltd Pressure detection device
JPH11326088A (en) * 1998-05-15 1999-11-26 Hokuriku Electric Ind Co Ltd Pressure sensor and its manufacture
JP2001074582A (en) * 1999-08-31 2001-03-23 Hitachi Ltd Cylinder inner pressure sensor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6437636U (en) * 1987-08-28 1989-03-07
JPH07253374A (en) * 1994-03-14 1995-10-03 Nippondenso Co Ltd Pressure detection device
JPH11326088A (en) * 1998-05-15 1999-11-26 Hokuriku Electric Ind Co Ltd Pressure sensor and its manufacture
JP2001074582A (en) * 1999-08-31 2001-03-23 Hitachi Ltd Cylinder inner pressure sensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006194736A (en) * 2005-01-13 2006-07-27 Denso Corp Pressure detection device and its manufacturing method
JP2010091389A (en) * 2008-10-07 2010-04-22 Nippon Soken Inc Cylinder pressure sensor
JPWO2016181449A1 (en) * 2015-05-11 2017-12-28 理化工業株式会社 Pressure sensor

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