JP2002013998A - Pressure transmitting medium sealing method for pressure sensor - Google Patents

Pressure transmitting medium sealing method for pressure sensor

Info

Publication number
JP2002013998A
JP2002013998A JP2000196061A JP2000196061A JP2002013998A JP 2002013998 A JP2002013998 A JP 2002013998A JP 2000196061 A JP2000196061 A JP 2000196061A JP 2000196061 A JP2000196061 A JP 2000196061A JP 2002013998 A JP2002013998 A JP 2002013998A
Authority
JP
Japan
Prior art keywords
pressure
housing
connector housing
sensor
sensor housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2000196061A
Other languages
Japanese (ja)
Other versions
JP3620414B2 (en
Inventor
Jiro Nakano
次郎 中野
Yasunori Aiki
康憲 相木
Hiroaki Terabe
宏明 寺部
Tomoya Yamakawa
知也 山川
Noritake Ura
則岳 裏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Koki KK
Original Assignee
Toyoda Koki KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyoda Koki KK filed Critical Toyoda Koki KK
Priority to JP2000196061A priority Critical patent/JP3620414B2/en
Publication of JP2002013998A publication Critical patent/JP2002013998A/en
Application granted granted Critical
Publication of JP3620414B2 publication Critical patent/JP3620414B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To solve the problem that a change of the inner pressure of a seal diaphragm gives the influence the reliability of the pressure detecting accuracy even if the predetermined quantity of the pressure transmitting medium is filled when unevenness is generated in the volume of a pressure detecting chamber formed between a sensor housing and a connector housing by a working error of the sensor housing and the connector housing. SOLUTION: Before fitting a connector housing 11 in a sensor housing 11 for installation, dimension of a part of at least one of the sensor housing 10 and the connector housing 11 giving the influence to the volume of a pressure detecting chamber 12 is measured, and the pressure transmitting medium 27 at a quantity corresponding to a result of this measurement is filled onto a seal diaphragm 14 of the sensor housing 10 or a recessed part 22 of the connector housing 11, and thereafter, the sensor housing 10 is fitted in the connector housing 11 for installation, and the pressure transmitting medium 27 is sealed in the pressure detecting chamber 12.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、圧力センサにおける圧
力伝達媒体封入方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sealing a pressure transmitting medium in a pressure sensor.

【0002】[0002]

【従来技術】ダイヤフラムに作用される圧力をシリコン
オイル等の圧力伝達媒体を介して感圧素子に伝達する圧
力センサにおいて、ダイヤフラムと感圧素子との間に形
成される圧力検出室に圧力伝達媒体を封入するものとし
て、特開平7−243926号公報に記載のものが知ら
れている。
2. Description of the Related Art In a pressure sensor for transmitting a pressure applied to a diaphragm to a pressure-sensitive element via a pressure transmission medium such as silicon oil, a pressure detection medium formed between the diaphragm and the pressure-sensitive element is provided with a pressure transmission medium. Is known in Japanese Patent Application Laid-Open No. 7-243926.

【0003】かかる従来公知のものにおいては、コネク
タハウジングの凹部に所定量の圧力伝達媒体を注入した
状態で、コネクタハウジングにセンサハウジングを装着
し、圧力伝達媒体を前記コネクタハウジングとセンサハ
ウジングとの間に形成される圧力検出室に封じ込めるよ
うにしている。
[0003] In such a conventional device, a sensor housing is mounted on a connector housing in a state where a predetermined amount of pressure transmitting medium is injected into a concave portion of the connector housing, and the pressure transmitting medium is transferred between the connector housing and the sensor housing. To be sealed in the pressure detection chamber.

【0004】このような注入方法によれば、センサハウ
ジングにコネクタハウジングを組付けた後の圧力検出室
に封入穴を介して圧力伝達媒体を封入するのに比べ、封
入穴を不要にできるとともに、封入後に封入穴を封止す
ることも必要なく、工程を簡素化できる特徴がある。
According to such an injection method, it is possible to eliminate the need for a sealing hole as compared with sealing a pressure transmitting medium through a sealing hole in a pressure detection chamber after the connector housing is assembled to the sensor housing. There is no need to seal the sealing hole after the sealing, and the process can be simplified.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、この種
の圧力センサにおいては、コネクタハウジングおよびセ
ンサハウジングの加工誤差等によって、コネクタハウジ
ングとセンサハウジングとの間に形成される圧力検出室
の容積にバラツキを生じ、所定量の圧力伝達媒体を注入
しても、容積が大き目のときは圧力検出室に空間を生ず
ることになり、容積が小さ目のときはダイヤフラムが膨
らむことになり、圧力検出精度の信頼性に影響を及ぼす
ことがある。
However, in this type of pressure sensor, the volume of the pressure detection chamber formed between the connector housing and the sensor housing varies due to processing errors of the connector housing and the sensor housing. Even if a predetermined amount of pressure transmission medium is injected, if the volume is large, a space will be created in the pressure detection chamber, and if the volume is small, the diaphragm will expand, and the reliability of the pressure detection accuracy will be high. May be affected.

【0006】このために、上記した従来公知のものにお
いては、圧力検出室の容積のバラツキを予め考慮して、
圧力伝達媒体を多少多めに注入しておき、コネクタハウ
ジングとセンサハウジングとを組合わせる際に、不要量
をオーバーフローさせて圧力検出室の容積に応じた圧力
伝達媒体を封入する必要がある。
[0006] For this reason, in the above-mentioned conventionally known device, a variation in the volume of the pressure detection chamber is considered in advance, and
It is necessary to fill the pressure transmission medium according to the volume of the pressure detection chamber by overflowing an unnecessary amount when the connector housing and the sensor housing are combined with a relatively large amount of the pressure transmission medium.

【0007】従って、従来公知のものにおいては、オー
バーフローした圧力伝達媒体の処理が大変であるという
問題があった。
[0007] Therefore, in the conventionally known apparatus, there is a problem that the processing of the overflowing pressure transmitting medium is difficult.

【0008】そこで本発明は上記した問題点を解決する
ためになされたもので、圧力検出室の容積に応じて、圧
力伝達媒体をオーバーフローさせることなく適切な量だ
け封入することができる圧力センサの製造方法を提供す
ることを目的とするものである。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a pressure sensor capable of filling an appropriate amount of a pressure transmitting medium without overflowing according to the volume of a pressure detecting chamber. It is intended to provide a manufacturing method.

【0009】[0009]

【課題を解決するための手段】本発明は、上記目的を達
成するためになされたもので、請求項1に記載の発明
は、先端に感圧素子を取付けた凹部を有する樹脂からな
るコネクタハウジングを、シールダイヤフラムを取付け
た金属からなるセンサハウジングに嵌合装着することに
より、センサハウジング側のシールダイヤフラムとコネ
クタハウジングの凹部との間に形成される圧力検出室に
圧力伝達媒体を封入する圧力センサにおける圧力伝達媒
体の封入方法にして、前記センサハウジングに前記コネ
クタハウジングを嵌合装着する前に、前記圧力検出室の
容積に影響を及ぼす前記センサハウジングおよびコネク
タハウジングの少なくとも一方の部位の寸法を測定し、
この測定結果に応じた量の圧力伝達媒体を前記センサハ
ウジング側のシールダイヤフラム上および前記コネクタ
ハウジングの凹部内の何れか一方に注入し、しかる後、
前記センサハウジングにコネクタハウジングを嵌合装着
して前記圧力伝達媒体を前記圧力検出室に封入するよう
にしてなるものである。
DISCLOSURE OF THE INVENTION The present invention has been made to achieve the above object, and the invention according to the first aspect is directed to a connector housing made of a resin having a concave portion having a pressure-sensitive element attached to a tip thereof. Pressure sensor that seals a pressure transmitting medium in a pressure detecting chamber formed between the seal diaphragm on the sensor housing side and the concave portion of the connector housing by fitting the sensor diaphragm into a sensor housing made of metal to which a seal diaphragm is attached. And measuring the dimensions of at least one of the sensor housing and the connector housing that affect the volume of the pressure detection chamber before fitting the connector housing into the sensor housing. And
An amount of pressure transmitting medium according to the measurement result is injected into one of the seal diaphragm on the sensor housing side and the inside of the concave portion of the connector housing, and thereafter,
The pressure transmitting medium is sealed in the pressure detecting chamber by fitting a connector housing to the sensor housing.

【0010】また、請求項2に記載の発明は、先端に感
圧素子を取付けた凹部を有する樹脂からなるコネクタハ
ウジングに、金属リングをインサート成形によって取付
け、このコネクタハウジングを、シールダイヤフラムを
取付けた金属からなるセンサハウジングの装着穴に嵌合
装着し、前記金属リングが装着穴の段部に係合する位置
で、前記コネクタハウジングをセンサハウジングに固定
することにより、センサハウジング側のシールダイヤフ
ラムとコネクタハウジングの凹部との間に形成される圧
力検出室に圧力伝達媒体を封入する圧力センサにおける
圧力伝達媒体の封入方法にして、前記センサハウジング
に前記コネクタハウジングを嵌合装着する前に、前記圧
力検出室の容積に影響を及ぼす前記センサハウジングの
内径と、前記コネクタハウジングの金属リングの軸方向
の取付け位置を測定し、この測定結果に応じた量の圧力
伝達媒体を前記センサハウジング側のシールダイヤフラ
ム上および前記コネクタハウジングの凹部内の何れか一
方に注入し、しかる後、前記センサハウジングにコネク
タハウジングを嵌合装着して前記圧力伝達媒体を前記圧
力検出室に封入するようにしてなるものである。
According to the second aspect of the present invention, a metal ring is attached by insert molding to a connector housing made of a resin having a concave portion with a pressure-sensitive element attached at the tip, and this connector housing is attached with a seal diaphragm. The connector housing is fixed to the sensor housing at a position where the metal ring engages with the mounting hole of the sensor housing made of metal and the metal ring engages with the stepped portion of the mounting hole. A method for sealing a pressure transmission medium in a pressure sensor for sealing a pressure transmission medium in a pressure detection chamber formed between the housing and a concave portion of the housing. An inner diameter of the sensor housing that affects the volume of the chamber; Measuring the axial mounting position of the metal ring of the housing, injecting a pressure transmission medium in an amount corresponding to the measurement result into one of the seal diaphragm on the sensor housing side and the recess in the connector housing, Thereafter, a connector housing is fitted and mounted on the sensor housing so that the pressure transmission medium is sealed in the pressure detection chamber.

【0011】さらに、請求項3に記載の発明は、測定結
果に応じた量の圧力伝達媒体を前記センサハウジングの
シールダイヤフラム上に注入するようにしたものであ
る。
Further, according to a third aspect of the present invention, an amount of the pressure transmitting medium according to the measurement result is injected onto the seal diaphragm of the sensor housing.

【0012】[0012]

【発明の作用効果】本発明によれば、センサハウジング
にコネクタハウジングを嵌合装着するに先立って、圧力
検出室に封入すべき圧力伝達媒体を注入しておき、セン
サハウジングへのコネクタハウジングの嵌合装着によっ
て圧力伝達媒体を圧力検出室に封入する方法であるの
で、工程を簡素化できる特徴がある。
According to the present invention, before fitting the connector housing to the sensor housing, a pressure transmitting medium to be sealed in the pressure detection chamber is injected before fitting the connector housing to the sensor housing. Since the pressure transmission medium is sealed in the pressure detection chamber by the joint mounting, the process can be simplified.

【0013】しかも本発明によれば、圧力検出室に封入
する圧力伝達媒体の量を、圧力検出室を構成する寸法の
バラツキに応じて調整するようにしているので、従来の
ように圧力検出室の容積に応じて圧力伝達媒体をオーバ
フローさせる必要がなく、センサハウジングにコネクタ
ハウジングを組付けた状態におけるダイヤフラム内圧を
均一に維持でき、高精度な圧力検出が可能な圧力センサ
を実現できる。
Further, according to the present invention, the amount of the pressure transmitting medium sealed in the pressure detecting chamber is adjusted according to the variation in the dimensions of the pressure detecting chamber. It is not necessary to overflow the pressure transmitting medium in accordance with the volume of the pressure sensor, the pressure inside the diaphragm can be maintained uniformly in a state where the connector housing is assembled to the sensor housing, and a pressure sensor capable of detecting pressure with high accuracy can be realized.

【0014】[0014]

【実施の形態】以下本発明の実施の形態を図に基づいて
説明する。図1は圧力センサの全体構成を示すもので、
10は金属製のセンサハウジングを、11はこのセンサ
ハウジング10に嵌合装着される樹脂製のコネクタハウ
ジングを示し、これらセンサハウジング10とコネクタ
ハウジング11との間に圧力検出室12が形成され、こ
の圧力検出室12に後述するようにして圧力伝達媒体
(シリコンオイル等)が封入されるようになっている。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the overall configuration of the pressure sensor.
Reference numeral 10 denotes a metal sensor housing, 11 denotes a resin connector housing fitted and mounted on the sensor housing 10, and a pressure detection chamber 12 is formed between the sensor housing 10 and the connector housing 11. A pressure transmission medium (silicon oil or the like) is sealed in the pressure detection chamber 12 as described later.

【0015】前記センサハウジング10の上部には、コ
ネクタハウジング11を装着するための段付13Aの装
着穴13が形成され、この装着穴13の底面にはシール
ダイヤフラム14がその周縁部を溶接により固定されて
いる。センサハウジング10の下方には、シールダイヤ
フラム14に圧力を導入するための導入穴15が形成さ
れ、この導入穴15はセンサハウジング10の下端に開
口されている。センサハウジング10の下部外周にはね
じ16が形成され、エンジン等に形成されたねじ穴に螺
着され、エンジン燃焼圧等を検出するようになってい
る。
A mounting hole 13 having a step 13A for mounting the connector housing 11 is formed in an upper portion of the sensor housing 10, and a seal diaphragm 14 is fixed to the bottom of the mounting hole 13 by welding a peripheral portion thereof. Have been. An introduction hole 15 for introducing pressure to the seal diaphragm 14 is formed below the sensor housing 10, and the introduction hole 15 is opened at a lower end of the sensor housing 10. A screw 16 is formed on the outer periphery of the lower portion of the sensor housing 10, and is screwed into a screw hole formed in an engine or the like, and detects an engine combustion pressure or the like.

【0016】一方、前記コネクタハウジング11の中央
部には、コネクタハウジング11を補強する金属リング
17が樹脂インサート成形によって一体的に取付けら
れ、この金属リング17の抜き穴17Aを通ってターミ
ナルピン18がコネクタハウジング11の上部まで伸び
ている。金属リング17が前記センサハウジング10の
装着穴13の段部13Aに係合した状態で、センサハウ
ジング10の上端部19を金属リング17の外周を包み
込むように内側に折り曲げる(かしめる)ことにより、
コネクタハウジング11をセンサハウジング10に固定
するようになっている。
On the other hand, a metal ring 17 for reinforcing the connector housing 11 is integrally attached to a central portion of the connector housing 11 by resin insert molding, and a terminal pin 18 passes through a through hole 17A of the metal ring 17. It extends to the upper part of the connector housing 11. In a state where the metal ring 17 is engaged with the step 13A of the mounting hole 13 of the sensor housing 10, the upper end portion 19 of the sensor housing 10 is bent inward so as to enclose the outer periphery of the metal ring 17 (caulking).
The connector housing 11 is fixed to the sensor housing 10.

【0017】また、前記センサハウジング10の装着穴
13に装着されるコネクタハウジング11の先端部端面
には凹部22が形成され、この凹部22の底部に圧力の
大きさに応じた電気信号を出力する感圧素子23が設け
られ、この感圧素子23はボンディングワイヤ24を介
して前記ターミナルピン18に接続されている。コネク
タハウジング11の先端部外周は前記装着穴13に嵌合
する大径部11Aと、その先端に設けられた小径部11
Bからなり、この小径部11Bに前記装着穴13の内周
に嵌合するテフロン(登録商標)リング25とOリング
26が装着されている。
A recess 22 is formed in the end of the connector housing 11 which is mounted in the mounting hole 13 of the sensor housing 10, and an electric signal corresponding to the magnitude of the pressure is output to the bottom of the recess 22. A pressure-sensitive element 23 is provided, and this pressure-sensitive element 23 is connected to the terminal pin 18 via a bonding wire 24. The outer periphery of the distal end of the connector housing 11 has a large-diameter portion 11A fitted into the mounting hole 13 and a small-diameter portion 11 provided at the distal end.
B, a Teflon (registered trademark) ring 25 and an O-ring 26 fitted to the inner periphery of the mounting hole 13 are mounted on the small diameter portion 11B.

【0018】これにより、センサハウジング10のシー
ルダイヤフラム14とコネクタハウジング11の凹部2
2との間に、Oリング26によって液密的にシールされ
た圧力検出室12が形成され、この圧力検出室12に圧
力伝達媒体としてのシリコンオイル27が封入される。
Thus, the seal diaphragm 14 of the sensor housing 10 and the recess 2 of the connector housing 11
The pressure detection chamber 12 is formed between the pressure detection chamber 12 and the pressure detection chamber 12 and is sealed in a liquid-tight manner by an O-ring 26. The pressure detection chamber 12 is filled with a silicone oil 27 as a pressure transmission medium.

【0019】次に上記した構成の圧力センサにおいて、
シリコンオイル27を圧力検出室12に封入する封入方
法について説明する。本実施の形態においては、シリコ
ンオイル27を封入するに先立って、圧力検出室12の
容積を算出し、その容積に応じた量のシリコンオイル2
7を注入するようにしている。
Next, in the pressure sensor having the above structure,
A method for sealing the silicon oil 27 into the pressure detection chamber 12 will be described. In the present embodiment, the volume of the pressure detection chamber 12 is calculated before the silicone oil 27 is sealed, and the amount of the silicon oil 2 corresponding to the volume is calculated.
7 is injected.

【0020】従って、まず初めに、圧力検出室12の容
積を算出する手順について、図2を参照して説明する。
前記コネクタハウジング11の先端部は、樹脂の型成形
によって成形されるため、型が同じであれば、比較的精
度よく成形される。すなわち、先端小径部11Bの外径
D0および先端面から大径部11Aの段部までの距離L
0、ならびに凹部22の形状精度等は高精度に確保され
る。
Therefore, first, a procedure for calculating the volume of the pressure detection chamber 12 will be described with reference to FIG.
Since the distal end of the connector housing 11 is molded by resin molding, the molding is performed with relatively high precision if the mold is the same. That is, the outer diameter D0 of the tip small diameter portion 11B and the distance L from the tip surface to the step of the large diameter portion 11A.
0 and the shape accuracy of the concave portion 22 are ensured with high accuracy.

【0021】これに対し、金属製のセンサハウジング1
0およびコネクタハウジング11の金属リング17は、
機械加工によって成形されるため、加工誤差(加工公
差)による寸法バラツキは事実上避けられない。このた
めに、センサハウジング10の装着穴13の内径D1
と、コネクタハウジング11の金属リング17端面から
大径部11Aの段部までの寸法L1はバラツキを生じ、
これら内径D1および距離L1のバラツキが圧力検出室
12の容積に影響を及ぼすようになる。
On the other hand, a metal sensor housing 1
0 and the metal ring 17 of the connector housing 11
Since it is formed by machining, dimensional variations due to processing errors (processing tolerances) are practically unavoidable. Therefore, the inner diameter D1 of the mounting hole 13 of the sensor housing 10 is
And the dimension L1 from the end face of the metal ring 17 of the connector housing 11 to the step of the large diameter portion 11A varies.
These variations in the inner diameter D1 and the distance L1 affect the volume of the pressure detection chamber 12.

【0022】従って、センサハウジング10にコネクタ
ハウジング11を装着するに先立って装着穴13の内径
D1と、金属リング17端面から大径部11Aの段部ま
での距離L1を測定し、この測定結果に基づき、圧力検
出室12の容積を算出する。なお、この場合における容
積の算出は、圧力検出室12の容積そのものを算出する
ようにしてもよいし、前記内径D1および距離L1に基
づいて、基準容積に対するバラツキ量を算出するように
してもよい。
Accordingly, prior to mounting the connector housing 11 on the sensor housing 10, the inner diameter D1 of the mounting hole 13 and the distance L1 from the end face of the metal ring 17 to the step of the large diameter portion 11A are measured. Based on this, the volume of the pressure detection chamber 12 is calculated. In this case, in calculating the volume, the volume of the pressure detection chamber 12 itself may be calculated, or the amount of variation with respect to the reference volume may be calculated based on the inner diameter D1 and the distance L1. .

【0023】次に図3Aに示すように、センサハウジン
グ10の装着穴13を上向きにした状態で、装着穴13
内のシールダイヤフラム14上に、前述したように算出
された容積に応じた容量あるいは重量のシリコンオイル
27を、図略のディスペンサ等によって注入する。次
に、図3Bに示すように、コネクタハウジング11を先
端部を下向きにして上方からセンサハウジング10の装
着穴13内に嵌合し、Oリング26でシールしながら、
金属リング17が装着穴13の段部13Aに当接する位
置までコネクタハウジング11を先端部をセンサハウジ
ング10の装着穴13内に装着する(図3C)。その
後、センサハウジング10の上端19の全周を内方にか
しめてコネクタハウジング11をセンサハウジング10
に固定する。
Next, as shown in FIG. 3A, with the mounting hole 13 of the sensor housing 10 facing upward, the mounting hole 13
A silicone oil 27 having a volume or weight corresponding to the volume calculated as described above is injected into the seal diaphragm 14 in the inside by a dispenser or the like (not shown). Next, as shown in FIG. 3B, the connector housing 11 is fitted into the mounting hole 13 of the sensor housing 10 from above with the front end thereof facing downward, and while being sealed with the O-ring 26,
The distal end of the connector housing 11 is mounted in the mounting hole 13 of the sensor housing 10 until the metal ring 17 comes into contact with the step 13A of the mounting hole 13 (FIG. 3C). Thereafter, the entire periphery of the upper end 19 of the sensor housing 10 is crimped inward to connect the connector housing 11 to the sensor housing 10.
Fixed to.

【0024】これにより、センサハウジング10とコネ
クタハウジング11間には、シールダイヤフラム14、
Oリング26等によって液密的に密閉された所定容積の
空間部(圧力検出室)12が形成され、この圧力検出室
12に前記シリコンオイル27が封入される。なお、セ
ンサハウジング10に対するコネクタハウジング11の
装着は、真空の雰囲気下で行われ、圧力検出室12内に
極力気泡が発生しないようにする。
Thus, between the sensor housing 10 and the connector housing 11, the seal diaphragm 14,
A space (pressure detection chamber) 12 having a predetermined volume, which is liquid-tightly sealed by an O-ring 26 and the like, is formed. The silicone oil 27 is sealed in the pressure detection chamber 12. The attachment of the connector housing 11 to the sensor housing 10 is performed in a vacuum atmosphere so that bubbles are not generated in the pressure detection chamber 12 as much as possible.

【0025】上記した実施の形態においては、センサハ
ウジング10側のシールダイヤフラム14上に圧力伝達
媒体(シリコンオイル)27を注入し、その上方からコ
ネクタハウジング11を装着する例について述べたが、
圧力伝達媒体27をコネクタハウジング11の凹部22
側に注入し、その上方からセンサハウジング10を装着
することもできる。
In the above-described embodiment, an example has been described in which the pressure transmitting medium (silicone oil) 27 is injected onto the seal diaphragm 14 on the sensor housing 10 side, and the connector housing 11 is mounted from above.
The pressure transmitting medium 27 is inserted into the recess 22 of the connector housing 11.
The sensor housing 10 can be mounted from above.

【0026】また、上記した実施の形態においては、樹
脂からなるコネクタハウジング11の成形精度はほとん
ど誤差は生じないものとして、センサハウジング10の
装着穴13の内径と、コネクタハウジング11の金属リ
ング端面位置に基づいて、シリコンオイル27の注入量
を調整する例について述べたが、複数の型を用いてコネ
クタハウジング11を成形するような場合には、型毎に
精度バラツキを生ずるようになる。
In the above embodiment, it is assumed that the molding accuracy of the connector housing 11 made of resin hardly causes an error, and the inner diameter of the mounting hole 13 of the sensor housing 10 and the position of the metal ring end face of the connector housing 11 are determined. Although the example of adjusting the injection amount of the silicon oil 27 based on the above has been described, when the connector housing 11 is formed using a plurality of dies, the accuracy varies among the dies.

【0027】従って、このような場合には、型固有の寸
法バラツキによる容積変化を予め測定しておき、センサ
ハウジング10にコネクタハウジング11を組付ける前
に、コネクタハウジング11の先端部の外径寸法を測定
することにより、コネクタハウジング11を成形した型
を特定し、これによって型固有の寸法バラツキを加味し
て、前記したシリコンオイル27の注入量を算出するこ
ともできる。
Therefore, in such a case, the volume change due to the dimensional variation inherent to the mold is measured in advance, and the outer diameter of the distal end portion of the connector housing 11 is set before the connector housing 11 is assembled to the sensor housing 10. Is measured, the mold in which the connector housing 11 is molded can be specified, and the injection amount of the silicone oil 27 can be calculated in consideration of the dimensional variation unique to the mold.

【0028】また、上記した実施の形態においては、圧
力検出室の容積に合わせてシリコンオイルの注入量を調
整することにより、最適なダイヤフラム位置とする例に
ついて述べたが、シリコンオイルの注入量を、寸法バラ
ツキだけでなく、使用する環境に応じて調整することも
できる。
Also, in the above-described embodiment, an example has been described in which the amount of silicon oil injected is adjusted in accordance with the volume of the pressure detection chamber so that the optimal diaphragm position is obtained. It can be adjusted according to not only the dimensional variation but also the use environment.

【0029】例えば、高温の環境下で使用する場合に
は、オイルの膨張を考慮して少な目の量に、低温の環境
下で使用する場合には、オイルの収縮を考慮して多め目
の量にすることもできる。
For example, when used in a high-temperature environment, the amount should be small in consideration of oil expansion, and when used in a low-temperature environment, a large amount should be considered in consideration of oil contraction. You can also

【0030】以上述べたように本実施の形態によれば、
圧力検出室を構成するセンサハウジングとコネクタハウ
ジングの寸法バラツキに応じて圧力伝達媒体の注入量を
調整するようにしたので、センサハウジングにコネクタ
ハウジングを組付けた状態におけるダイヤフラム内圧を
均一に維持でき、高精度な圧力検出が可能な圧力センサ
を実現できる効果がある。
As described above, according to the present embodiment,
Since the injection amount of the pressure transmitting medium is adjusted according to the dimensional variation of the sensor housing and the connector housing constituting the pressure detection chamber, the internal pressure of the diaphragm in a state where the connector housing is assembled to the sensor housing can be maintained uniformly, There is an effect that a pressure sensor capable of detecting pressure with high accuracy can be realized.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施の形態を示す圧力センサの断面図
である。
FIG. 1 is a sectional view of a pressure sensor showing an embodiment of the present invention.

【図2】圧力センサの圧力検出室の容積を算出するため
の説明図である。
FIG. 2 is an explanatory diagram for calculating a volume of a pressure detection chamber of a pressure sensor.

【図3】センサハウジングにコネクタハウジングを装着
する状態を示す概略図である。
FIG. 3 is a schematic view showing a state in which a connector housing is mounted on a sensor housing.

【符号の説明】[Explanation of symbols]

10 センサハウジング 11 コネクタハウジング 12 圧力検出室 13 装着穴 14 シールダイヤフラム 17 金属リング 22 凹部 23 感圧素子 26 Oリング 27 圧力伝達媒体(シリコンオイル) DESCRIPTION OF SYMBOLS 10 Sensor housing 11 Connector housing 12 Pressure detection chamber 13 Mounting hole 14 Seal diaphragm 17 Metal ring 22 Depression 23 Pressure sensitive element 26 O ring 27 Pressure transmission medium (silicone oil)

───────────────────────────────────────────────────── フロントページの続き (72)発明者 山川 知也 愛知県刈谷市朝日町1丁目1番地 豊田工 機株式会社内 (72)発明者 裏 則岳 愛知県刈谷市朝日町1丁目1番地 豊田工 機株式会社内 Fターム(参考) 2F055 AA23 BB20 CC02 DD20 EE40 FF49 GG25 HH07  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomoya Yamakawa 1-1-1, Asahi-cho, Kariya-shi, Aichi Toyota Machine Works Co., Ltd. (72) Inventor Noritake Ura 1-1-1, Asahi-cho, Kariya-shi, Aichi F term (reference) 2F055 AA23 BB20 CC02 DD20 EE40 FF49 GG25 HH07

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 先端に感圧素子を取付けた凹部を有する
樹脂製のコネクタハウジングを、シールダイヤフラムを
取付けた金属製のセンサハウジングに嵌合装着すること
により、センサハウジング側のシールダイヤフラムとコ
ネクタハウジングの凹部との間に形成される圧力検出室
に圧力伝達媒体を封入する圧力センサにおける圧力伝達
媒体の封入方法にして、前記センサハウジングに前記コ
ネクタハウジングを嵌合装着する前に、前記圧力検出室
の容積に影響を及ぼす前記センサハウジングおよびコネ
クタハウジングの少なくとも一方の部位の寸法を測定
し、この測定結果に応じた量の圧力伝達媒体を前記セン
サハウジング側のシールダイヤフラム上および前記コネ
クタハウジングの凹部内の何れか一方に注入し、しかる
後、前記センサハウジングにコネクタハウジングを嵌合
装着して前記圧力伝達媒体を前記圧力検出室に封入する
ようにしてなる圧力センサにおける圧力伝達媒体封入方
法。
1. A connector housing made of a resin having a concave portion having a pressure-sensitive element mounted at a tip thereof is fitted and mounted on a metal sensor housing having a seal diaphragm mounted thereon, whereby the seal diaphragm on the sensor housing side and the connector housing are mounted. The method for sealing a pressure transmitting medium in a pressure sensor for sealing a pressure transmitting medium in a pressure detecting chamber formed between the pressure detecting chamber and the concave portion of the pressure detecting chamber before fitting the connector housing to the sensor housing. The dimensions of at least one of the sensor housing and the connector housing that affect the volume of the sensor housing are measured, and an amount of the pressure transmitting medium corresponding to the measurement result is supplied on the seal diaphragm on the sensor housing side and in the recess of the connector housing. And then the sensor housing is injected. A pressure transmitting medium sealing method in a pressure sensor, wherein a pressure transmitting medium is sealed in the pressure detecting chamber by fitting a connector housing to the housing.
【請求項2】 先端に感圧素子を取付けた凹部を有する
樹脂製のコネクタハウジングに、金属リングをインサー
ト成形によって取付け、このコネクタハウジングを、シ
ールダイヤフラムを取付けた金属製のセンサハウジング
の装着穴に嵌合装着し、前記金属リングが装着穴の段部
に係合する位置で、前記コネクタハウジングをセンサハ
ウジングに固定することにより、センサハウジング側の
シールダイヤフラムとコネクタハウジングの凹部との間
に形成される圧力検出室に圧力伝達媒体を封入する圧力
センサにおける圧力伝達媒体の封入方法にして、前記セ
ンサハウジングに前記コネクタハウジングを嵌合装着す
る前に、前記圧力検出室の容積に影響を及ぼす前記セン
サハウジングの内径と、前記コネクタハウジングの金属
リングの軸方向の取付け位置を測定し、この測定結果に
応じた量の圧力伝達媒体を前記センサハウジング側のシ
ールダイヤフラム上および前記コネクタハウジングの凹
部内の何れか一方に注入し、しかる後、前記センサハウ
ジングにコネクタハウジングを嵌合装着して前記圧力伝
達媒体を前記圧力検出室に封入するようにしてなる圧力
センサにおける圧力伝達媒体封入方法。
2. A metal ring is attached by insert molding to a resin connector housing having a concave portion to which a pressure-sensitive element is attached at the tip, and this connector housing is inserted into a mounting hole of a metal sensor housing to which a seal diaphragm is attached. The connector housing is fixed to the sensor housing at the position where the metal ring is fitted and mounted and the metal ring is engaged with the stepped portion of the mounting hole, so that the connector housing is formed between the seal diaphragm on the sensor housing side and the recess of the connector housing. A pressure transmission medium enclosing method for enclosing the pressure transmission medium in the pressure detection chamber, the sensor having an influence on the volume of the pressure detection chamber before fitting the connector housing into the sensor housing. The inner diameter of the housing and the axial clearance of the metal ring of the connector housing After measuring the attachment position, an amount of the pressure transmitting medium according to the measurement result is injected into one of the seal diaphragm on the sensor housing side and the concave portion of the connector housing, and then the connector housing is inserted into the sensor housing. A pressure transmitting medium sealing method in a pressure sensor, wherein the pressure transmitting medium is sealed in the pressure detecting chamber by fitting.
【請求項3】 測定結果に応じた量の圧力伝達媒体を前
記センサハウジングのシールダイヤフラム上に注入する
ようにした請求項1もしくは請求項2に記載の圧力セン
サにおける圧力伝達媒体封入方法。
3. The method for sealing a pressure transmitting medium in a pressure sensor according to claim 1, wherein an amount of the pressure transmitting medium according to the measurement result is injected onto the seal diaphragm of the sensor housing.
JP2000196061A 2000-06-29 2000-06-29 Method for enclosing pressure transmission medium in pressure sensor Expired - Fee Related JP3620414B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000196061A JP3620414B2 (en) 2000-06-29 2000-06-29 Method for enclosing pressure transmission medium in pressure sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000196061A JP3620414B2 (en) 2000-06-29 2000-06-29 Method for enclosing pressure transmission medium in pressure sensor

Publications (2)

Publication Number Publication Date
JP2002013998A true JP2002013998A (en) 2002-01-18
JP3620414B2 JP3620414B2 (en) 2005-02-16

Family

ID=18694620

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000196061A Expired - Fee Related JP3620414B2 (en) 2000-06-29 2000-06-29 Method for enclosing pressure transmission medium in pressure sensor

Country Status (1)

Country Link
JP (1) JP3620414B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7194375B2 (en) 2003-12-24 2007-03-20 Toyoda Koki Kabushiki Kaisha Pressure sensor
JP2012107880A (en) * 2010-11-15 2012-06-07 Denso Corp Component assembly method and fluid injection/sealing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7194375B2 (en) 2003-12-24 2007-03-20 Toyoda Koki Kabushiki Kaisha Pressure sensor
JP2012107880A (en) * 2010-11-15 2012-06-07 Denso Corp Component assembly method and fluid injection/sealing apparatus

Also Published As

Publication number Publication date
JP3620414B2 (en) 2005-02-16

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