JP5651670B2

JP5651670B2 - Pressure detection unit

Info

Publication number: JP5651670B2
Application number: JP2012235429A
Authority: JP
Inventors: 琢郎石川; 和哉滝本; 和徳石橋
Original assignee: Saginomiya Seisakusho Inc
Current assignee: Saginomiya Seisakusho Inc
Priority date: 2012-10-25
Filing date: 2012-10-25
Publication date: 2015-01-14
Anticipated expiration: 2032-10-25
Also published as: CN103776583A; CN103776583B; JP2014085266A

Description

本発明は、圧力検知ユニットに関し、特に、防水性が要求される圧力検知ユニットに関する。 The present invention relates to a pressure detection unit, in particular, relates to pressure sensing unit waterproofness is required.

従来、圧力検知ユニットとして、例えば、特許文献１に開示されたものがある。特許文献１に記載された圧力検知ユニットとしての圧力センサ８００は、図３に示すように、円環状に形成されたステンレス製の受け部材８０２と、略円筒状に形成され、一端を塞ぐように受け部材８０２を収容する合成樹脂製のカバー８６０と、受け部材８０２の内側の開口８０２ｂに嵌合されるとともにロウ付けされて固定された流体流入管８１１と、受け部材８０２とカバー８６０との間を接着するシリコーン系又はウレタン系の接着剤８７２と、を有するケースを備えている。 Conventionally, as a pressure detection unit, for example, there is one disclosed in Patent Document 1. As shown in FIG. 3, a pressure sensor 800 as a pressure detection unit described in Patent Document 1 is formed in a ring-shaped stainless steel receiving member 802 and a substantially cylindrical shape so as to block one end. A synthetic resin cover 860 that accommodates the receiving member 802, a fluid inflow pipe 811 that is fitted into the opening 802 b inside the receiving member 802 and is fixed by brazing, and between the receiving member 802 and the cover 860. And a silicone-based or urethane-based adhesive 872.

この圧力センサ８００では、接着剤８７２が受け部材８０２とカバー８６０とを固定するようにこれらの隙間に充填されており、受け部材８０２とカバー８６０とが互いに接着されている。また、この接着剤８７２は受け部材８０２に密に接して設けられており、接着剤８７２と受け部材８０２との界面からケース内部に水分が浸入することを防いで防水性を確保していた。 In the pressure sensor 800, an adhesive 872 is filled in the gap so as to fix the receiving member 802 and the cover 860, and the receiving member 802 and the cover 860 are bonded to each other. Further, the adhesive 872 is provided in close contact with the receiving member 802 to prevent moisture from entering the case from the interface between the adhesive 872 and the receiving member 802 and ensure waterproofness.

特開２０１２−６８１０５号公報JP 2012-68105 A

しかしながら、このような圧力センサ８００は、受け部材８０２がステンレス製であることから、受け部材８０２の外表面における接着剤８７２の端部から上記界面に徐々に水分が浸入してしまうことがあり、防水性について改良の余地があった。 However, in such a pressure sensor 800, since the receiving member 802 is made of stainless steel, moisture may gradually enter the interface from the end of the adhesive 872 on the outer surface of the receiving member 802. There was room for improvement in waterproofness.

また、このような圧力センサ８００以外にも、防水性が要求されるケースであって、該ケースにおけるある第１部分と、この第１部分に隣接して設けられた第２部分と、第１部分に接して設けられた接着剤と、を有する構成のケースにおいても、上記圧力センサ８００と同様に、防水性について改良の余地がある場合があった。 In addition to the pressure sensor 800, the case is required to be waterproof, and includes a first portion in the case, a second portion provided adjacent to the first portion, a first portion Even in the case of the configuration having the adhesive provided in contact with the portion, there is a case where there is room for improvement in waterproofness as in the case of the pressure sensor 800 described above.

そこで、本発明は、上記課題を解決することを目的とする。即ち、本発明は、防水性を向上できる圧力検知ユニットを提供することを目的としている。 Therefore, an object of the present invention is to solve the above problems. That is, the present invention aims at providing a pressure sensing unit capable of improving the waterproofness.

請求項１に記載された発明は、上記目的を達成するために、流管接続部材と、前記流管接続部材に隣接して設けられた流管部材と、前記流管接続部材に接して設けられた接着剤と、筒状のカバーと、を有する容器を備えた圧力検知ユニットであって、前記流管部材が、該流管部材と前記接着剤との界面の耐水性が前記流管接続部材と前記接着剤との界面の耐水性より高くなるように、前記流管接続部材と異なる材料で構成され、前記流管接続部材が前記カバー内側に配置されるとともに前記流管部材が前記カバーの一端部から突出するように配置され、前記接着剤が、前記カバーの前記一端部に充填されて、少なくとも前記流管接続部材の外表面全体及び前記流管部材における前記流管接続部材の外表面に隣接する箇所を覆うように設けられていることを特徴とする圧力検知ユニットである。 In order to achieve the above object, the invention described in claim 1 is provided in contact with the flow tube connecting member, the flow tube member provided adjacent to the flow tube connecting member, and the flow tube connecting member. an adhesive that is, a pressure sensing unit comprising a container having a cylindrical cover, wherein the flow tube member, water resistance the flow tube connecting the interface between the adhesive and the flow tube member The flow tube connecting member is made of a material different from that of the flow tube connecting member so as to be higher than the water resistance of the interface between the member and the adhesive, and the flow tube connecting member is disposed inside the cover and the flow tube member is the cover It is arranged from one end portion so as to protrude, wherein the adhesive is filled into the end portion of the cover, out of the flow tube connecting members in the entire outer surface of at least said flow tube connecting member and the flow tube member It is provided so as to cover the part adjacent to the surface. A pressure sensing unit, characterized in that there.

請求項２に記載された発明は、請求項１に記載された発明において、前記流管接続部材を構成する材料が、ステンレス又はアルミニウムであることを特徴とするものである。 The invention described in claim 2 is characterized in that, in the invention described in claim 1, the material constituting the flow tube connecting member is stainless steel or aluminum.

請求項３に記載された発明は、請求項１又は２に記載された発明において、前記流管部材を構成する材料が、合成樹脂、銅又は銅合金であることを特徴とするものである。 The invention described in claim 3 is the invention described in claim 1 or 2, wherein the material constituting the flow tube member is a synthetic resin, copper or a copper alloy.

請求項４に記載された発明は、請求項１〜３のいずれか一項に記載された発明において、前記接着剤が、エポキシ系接着剤、ウレタン系接着剤又はシリコーン系接着剤であることを特徴とするものである。 The invention described in claim 4 is the invention described in any one of claims 1 to 3, wherein the adhesive is an epoxy adhesive, a urethane adhesive, or a silicone adhesive. It is a feature.

本発明によれば、流管部材が、この流管部材と接着剤との界面の耐水性が流管接続部材と接着剤との界面の耐水性より高くなるように、流管接続部材と異なる材料で構成され、接着剤が、少なくとも流管接続部材の外表面全体及び流管部材における流管接続部材の外表面に隣接する箇所を覆うように設けられている。そのため、流管接続部材と接着剤との界面（境界）が露出されずに、流管部材と接着剤との界面が露出され、そして、これらの露出された流管部材と接着剤との界面は、流管接続部材と接着剤との界面より耐水性が高くされており、これにより、各部材と接着剤との露出される界面の耐水性を高めて防水性を向上できる。 According to the present invention, the flow tube member, so that the water resistance of the interface between the flow tube member and the adhesive is higher than the water resistance of the interface between the flow tube connecting members and the adhesive, different from the flow tube connecting members is formed of a material, the adhesive is provided so as to cover a portion adjacent to the outer surface of the flow tube connecting members in the entire outer surface of at least flow tube connecting members and the flow tube member. Therefore, without being exposed interface (boundary) of the flow tube connecting members and the adhesive interface between the flow tube member and the adhesive is exposed and the interface between these exposed flowtube member and the adhesive The water resistance is higher than the interface between the flow tube connecting member and the adhesive, whereby the water resistance of the exposed interface between each member and the adhesive can be increased to improve the waterproof property.

本発明の一実施形態の圧力検知ユニットの縦断面図である。It is a longitudinal cross-sectional view of the pressure detection unit of one Embodiment of this invention. 図１の圧力検知ユニットの変形例の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of the modification of the pressure detection unit of FIG. 従来の圧力検知ユニットの縦断面図である。It is a longitudinal cross-sectional view of the conventional pressure detection unit.

（第１の実施形態）
以下に、本発明の第１の実施形態の圧力検知ユニットを、図１を参照して説明する。 (First embodiment)
Below, the pressure detection unit of the 1st Embodiment of this invention is demonstrated with reference to FIG.

図１は、本発明の一実施形態の圧力検知ユニットの縦断面図である。なお、以下の説明における「上下」の概念は、図１における上下に対応しており、各部材の相対的な位置関係を示すものであって、絶対的な位置関係を示すものではない。 FIG. 1 is a longitudinal sectional view of a pressure detection unit according to an embodiment of the present invention. In addition, the concept of “upper and lower” in the following description corresponds to the upper and lower sides in FIG. 1 and indicates the relative positional relationship between the members, and does not indicate the absolute positional relationship.

図１に示す圧力検知ユニット（図中、符号１で示す）は、ベース１１と、受け部材１２と、ダイヤフラム１３と、圧力検知素子１４と、電気接続部２０と、継手部３０と、カバー４０と、第１接着剤５１と、第２接着剤５２と、を備えている。また、受け部材１２、継手部３０、カバー４０及び第２接着剤５２により、圧力検知ユニット１の外形となる容器１０を構成している。 1 includes a base 11, a receiving member 12, a diaphragm 13, a pressure detecting element 14, an electrical connecting portion 20, a joint portion 30, and a cover 40. The pressure detecting unit shown in FIG. And a first adhesive 51 and a second adhesive 52. In addition, the receiving member 12, the joint portion 30, the cover 40, and the second adhesive 52 constitute a container 10 that is the outer shape of the pressure detection unit 1.

ベース１１は、円板状のベース本体１１ａと、ベース本体１１ａの周縁から図中下方に向けて直角に立設された鍔部１１ｂと、を備える蓋状に形成されている。 The base 11 is formed in a lid shape including a disc-shaped base main body 11a and a flange portion 11b erected at a right angle from the periphery of the base main body 11a downward in the figure.

ベース本体１１ａには、後述する受圧空間１７へのオイル封入用のオイル充填孔１１ｃが、当該ベース本体１１ａを貫通して形成されている。このオイル充填孔１１ｃは、オイル充填後にボール１５によって封じられる。また、ベース本体１１ａには、後述する電気接続部２０のリードピン２２が通されるリードピン取出孔１１ｄが、当該ベース本体１１ａを貫通して形成されている。 In the base body 11a, an oil filling hole 11c for enclosing oil into a pressure receiving space 17 described later is formed so as to penetrate the base body 11a. The oil filling hole 11c is sealed by a ball 15 after oil filling. The base body 11a is formed with a lead pin extraction hole 11d through which a lead pin 22 of the electrical connecting portion 20 described later passes, through the base body 11a.

受け部材１２は、円板状の受け部材本体１２ａと、受け部材本体１２ａの周縁にその中心から離れるように図中斜め上方向に向けて立設された鍔部１２ｂと、を備える皿状に形成されている。鍔部１２ｂの先端は、受け部材本体１２ａと略平行な平坦に形成されている。受け部材本体１２ａの中心部分には開口１２ｃが形成されている。ベース１１と受け部材１２とは、ベース１１の鍔部１１ｂの先端と受け部材１２の鍔部１２ｂとの先端が後述するダイヤフラム１３を挟んで重なるように配置されている。 The receiving member 12 has a disc-like shape including a disc-shaped receiving member main body 12a and a flange portion 12b erected on the periphery of the receiving member main body 12a obliquely upward in the figure so as to be away from the center thereof. Is formed. The front end of the flange portion 12b is formed flat and substantially parallel to the receiving member main body 12a. An opening 12c is formed in the central portion of the receiving member main body 12a. The base 11 and the receiving member 12 are arranged so that the tip of the flange 11b of the base 11 and the tip of the flange 12b of the receiving member 12 overlap with each other with a diaphragm 13 described later.

ダイヤフラム１３は、円形の膜状に形成されており、その外周縁部１３ａが、ベース１１の鍔部１１ｂの先端と受け部材１２の鍔部１２ｂとの先端に挟まれて配置されている。 The diaphragm 13 is formed in a circular film shape, and the outer peripheral edge portion 13 a is disposed between the tip of the flange portion 11 b of the base 11 and the tip of the flange portion 12 b of the receiving member 12.

ベース１１の鍔部１１ｂの先端、受け部材１２の鍔部１２ｂの先端、及び、ダイヤフラム１３の外周縁部１３ａは、それら接合箇所Ｓがレーザー溶接等によって互いに溶接されて、この接合箇所Ｓにおいて互いに一体的かつ密封して連結・固定されている。これにより、ベース１１とダイヤフラム１３との間には、オイルが封入される受圧空間１７が形成され、受け部材１２とダイヤフラム１３との間には加圧空間１８が形成されている。 The tip of the flange 11b of the base 11, the tip of the flange 12b of the receiving member 12, and the outer peripheral edge 13a of the diaphragm 13 are welded to each other by laser welding or the like. Connected and fixed integrally and sealed. Thereby, a pressure receiving space 17 in which oil is sealed is formed between the base 11 and the diaphragm 13, and a pressure space 18 is formed between the receiving member 12 and the diaphragm 13.

ベース１１、受け部材１２及びダイヤフラム１３は、ステンレスを材料として構成されていることが好ましい。または、これらの一部又は全部が、例えば、アルミニウム（アルミニウム合金を含む）を材料として構成されていてもよい。 The base 11, the receiving member 12, and the diaphragm 13 are preferably made of stainless steel. Alternatively, some or all of these may be made of, for example, aluminum (including an aluminum alloy).

圧力検知素子１４は、（ａ）シリコン基板の裏面中央部をエッチングして形成されたダイヤフラム部（シリコンダイヤフラム）と、（ｂ）複数の検知素子部（ピエゾ抵抗素子）を含んでダイヤフラム部に形成されたブリッジ回路、並びに、該ブリッジ回路の出力信号を処理する増幅回路、直線補正回路、温度補正回路及び補正データ保持回路などを有する電子回路部と、が半導体回路集積化技術により集積化されている。圧力検知素子１４の金属端子部（ボンディングパッド）は後述するリードピン２２と受圧空間１７内にてワイヤボンディングにより接続されている。圧力検知素子１４は、ダイヤフラム部からなる受圧部１４ａに加えられた圧力に応じた圧力信号を出力する。 The pressure detecting element 14 includes (a) a diaphragm portion (silicon diaphragm) formed by etching the center of the back surface of the silicon substrate, and (b) a plurality of detecting element portions (piezoresistive elements). And an electronic circuit unit including an amplifier circuit, a linear correction circuit, a temperature correction circuit, a correction data holding circuit, and the like that process an output signal of the bridge circuit are integrated by a semiconductor circuit integration technique. Yes. A metal terminal portion (bonding pad) of the pressure detecting element 14 is connected to a lead pin 22 (described later) in the pressure receiving space 17 by wire bonding. The pressure detection element 14 outputs a pressure signal corresponding to the pressure applied to the pressure receiving part 14a formed of a diaphragm part.

圧力検知素子１４は、受圧空間１７内に配置された状態でベース１１に取り付けられている。圧力検知素子１４は、ベース１１のベース本体１１ａを貫通して形成されているリードピン取出孔１１ｄを通して延びる電気接続部２０のリードピン２２を通じて基板２１に電気的に接続されている。ベース１１のリードピン取出孔１１ｄは、ハーメチックシール１６によってオイル漏れがないように封じられている。 The pressure detection element 14 is attached to the base 11 in a state of being disposed in the pressure receiving space 17. The pressure detection element 14 is electrically connected to the substrate 21 through the lead pin 22 of the electrical connection portion 20 extending through the lead pin extraction hole 11d formed through the base body 11a of the base 11. The lead pin outlet hole 11d of the base 11 is sealed by a hermetic seal 16 so that there is no oil leakage.

電気接続部２０は、後述するカバー４０内に配置されており、基板２１と、基板２１と圧力検知素子１４とを電気的に接続するリードピン２２と、基板２１に接続されたコネクタ２３と、コネクタ２３に接続されたリード線２４とを有している。これにより、圧力検知素子１４から出力された圧力信号が、リードピン２２、基板２１及びコネクタ２３を通じて、リード線２４から外部へと取り出される。 The electrical connection unit 20 is disposed in a cover 40 described later, and includes a substrate 21, lead pins 22 that electrically connect the substrate 21 and the pressure detection element 14, a connector 23 connected to the substrate 21, and a connector. And a lead wire 24 connected to 23. As a result, the pressure signal output from the pressure detection element 14 is taken out from the lead wire 24 through the lead pin 22, the substrate 21, and the connector 23.

リードピン２２とリード線２４とは、それらの引き出し方向（図中上下方向）に対して交差する方向（図中左右方向）にずれて配置されており、リードピン２２とリード線２４の接続は基板２１を介して行われている。 The lead pin 22 and the lead wire 24 are arranged so as to be shifted in a direction (left and right direction in the figure) intersecting with the drawing direction (up and down direction in the figure), and the connection between the lead pin 22 and the lead wire 24 is the board 21. Is done through.

継手部３０は、銅を材料として構成されている。または、継手部３０は、真鍮などの銅合金や後述するカバー４０と同一の合成樹脂等を材料として構成されていてもよい。継手部３０は、略筒状でその図中上方の一端部が段階的に縮径する階段状に形成されている。継手部３０は、その一端部の先端３０ａが受け部材１２の開口１２ｃに挿入されることにより、継手部３０の内側の流体導入通路３２と加圧空間１８とが連通される。また、継手部３０は、その一端部の先端３０ａと受け部材１２の開口１２ｃの周縁とがそれら間を密封するようにロウ付けされることにより、受け部材１２に固定して取り付けられている。継手部３０は、受け部材１２に該受け部材１２の外表面（外側を向く表面部分）から突出するように設けられている。 The joint portion 30 is made of copper. Alternatively, the joint portion 30 may be made of a copper alloy such as brass or the same synthetic resin as the cover 40 described later. The joint part 30 is substantially cylindrical and is formed in a stepped shape in which the upper end in the drawing is gradually reduced in diameter. The joint portion 30 has a tip 30 a at one end thereof inserted into the opening 12 c of the receiving member 12, whereby the fluid introduction passage 32 inside the joint portion 30 and the pressurizing space 18 are communicated with each other. The joint portion 30 is fixedly attached to the receiving member 12 by brazing the tip 30a at one end thereof and the peripheral edge of the opening 12c of the receiving member 12 so as to seal between them. The joint portion 30 is provided on the receiving member 12 so as to protrude from the outer surface (surface portion facing outward) of the receiving member 12.

継手部３０の他端部内側には、雌ねじが切られた結合用ねじ部３１が設けられており、図示しない流体導入管を螺合して接続可能とされている。つまり、継手部３０は流管部材を構成し、受け部材１２は、流管部材である継手部３０が接続される流管接続部材を構成する。 Inside the other end of the joint portion 30, a coupling thread portion 31 having a female thread is provided, which can be connected by screwing a fluid introduction pipe (not shown). That is, the joint portion 30 constitutes a flow tube member, and the receiving member 12 constitutes a flow tube connection member to which the joint portion 30 that is a flow tube member is connected.

継手部３０の結合用ねじ部３１に流体導入管が接続されると、継手部３０の流体導入通路３２を通じて、流体の圧力が加圧空間１８に導入されてダイヤフラム１３に伝達される。ダイヤフラム１３は極めて薄いため圧力損失が生ずることなく圧力伝達が行われる。この圧力を圧力検知素子１４の受圧部１４ａで受けて、それをピエゾ抵抗素子で検出した電気信号が電子回路部で処理され、圧力信号としてリードピン２２に出力される。 When the fluid introduction pipe is connected to the coupling thread portion 31 of the joint portion 30, the fluid pressure is introduced into the pressurizing space 18 and transmitted to the diaphragm 13 through the fluid introduction passage 32 of the joint portion 30. Since the diaphragm 13 is very thin, pressure is transmitted without causing pressure loss. This pressure is received by the pressure receiving portion 14a of the pressure detecting element 14, and an electric signal detected by the piezoresistive element is processed by the electronic circuit portion and output to the lead pin 22 as a pressure signal.

カバー４０は、例えば、ポリフェニレンエーテル（ＰＰＥ）等の合成樹脂を材料として構成されている。または、カバー４０は、銅又は銅合金（真鍮など）を材料として構成されていてもよい。カバー４０は、電気接続部２０のコネクタ２３を収容する図中上方の端部が、リード線２４を取り囲むように縮径されて小径端部４１として形成されており、ベース１１及び受け部材１２を収容する図中下方の端部が、内径を大きくして且つ筒状スカート状に延びる大径端部４２として形成されている。 The cover 40 is made of a synthetic resin such as polyphenylene ether (PPE), for example. Alternatively, the cover 40 may be made of copper or a copper alloy (such as brass) as a material. The cover 40 is formed as a small-diameter end 41 by reducing the diameter of the upper end portion of the electrical connecting portion 20 in the figure that accommodates the connector 23 so as to surround the lead wire 24, and the base 11 and the receiving member 12. A lower end portion in the drawing is formed as a large-diameter end portion 42 having an enlarged inner diameter and extending in a cylindrical skirt shape.

小径端部４１の内周面には、その全周にわたり突出した突出部４１ａが形成されている。この突出部４１ａは、カバー４０内の後述する第１空間４７に充填された第１接着剤５１の抜け止めとして機能する。 On the inner peripheral surface of the small-diameter end portion 41, a protruding portion 41a protruding over the entire periphery is formed. The protruding portion 41a functions as a retainer for the first adhesive 51 filled in a first space 47 described later in the cover 40.

大径端部４２の内周側には、ベース１１の外径とほぼ同径の環状段部４２ａが形成されている。この環状段部４２ａには、ベース１１がその外径角部である環状角部１１ｅにおいて嵌合し且つ座着するように載置されている。これにより、大径端部４２の図中下方の開口を塞ぐようにベース１１に一体に固定された受け部材１２が配置される。この状態において、カバー４０が、受け部材１２の周囲を囲むように当該受け部材１２に隣接して設けられている。また、継手部３０が、受け部材１２の中央部分に設けられた開口１２ｃに一端を挿入した状態で固定されており、つまり、継手部３０が、カバー４０との間に受け部材１２を挟むように受け部材１２に隣接して設けられている。 An annular step 42 a having the same diameter as the outer diameter of the base 11 is formed on the inner peripheral side of the large diameter end portion 42. The base 11 is placed on the annular step 42a so as to be fitted and seated at an annular corner 11e which is an outer diameter corner. As a result, the receiving member 12 that is integrally fixed to the base 11 is disposed so as to close the lower opening of the large diameter end portion 42 in the drawing. In this state, the cover 40 is provided adjacent to the receiving member 12 so as to surround the receiving member 12. Further, the joint portion 30 is fixed in a state where one end is inserted into the opening 12 c provided in the central portion of the receiving member 12, that is, the joint portion 30 sandwiches the receiving member 12 with the cover 40. Is provided adjacent to the receiving member 12.

大径端部４２の内周側における環状段部４２ａよりも図中下方の開口寄りの箇所には、ベース１１の外径よりも大径の筒状内周面４２ｂが設けられている。この筒状内周面４２ｂと、ベース１１の鍔部１１ｂの外周面１１ｆや受け部材１２の鍔部１２ｂの周面１２ｄとの間に、後述する接着剤のための環状隙間４５が全周に渡って形成されている。環状隙間４５は、大径端部４２の図中下方の開口付近において、後述する開き空間４６と連なって、第２空間４８を構成する。 A cylindrical inner peripheral surface 42b having a diameter larger than the outer diameter of the base 11 is provided at a position closer to the opening in the figure than the annular step portion 42a on the inner peripheral side of the large diameter end portion 42. Between this cylindrical inner peripheral surface 42b and the outer peripheral surface 11f of the flange portion 11b of the base 11 and the peripheral surface 12d of the flange portion 12b of the receiving member 12, an annular gap 45 for an adhesive, which will be described later, is formed on the entire circumference. It is formed across. The annular gap 45 is connected to an open space 46 to be described later in the vicinity of the opening of the large-diameter end portion 42 in the lower part of the drawing, and constitutes a second space 48.

カバー４０の内側は、カバー４０に収容されたベース１１で区切られており、ベース１１のベース本体１１ａから小径端部４１側には、第１空間４７が形成されている。この第１空間４７には、電気接続部２０（具体的には、基板２１、リードピン２２、コネクタ２３及びリード線２４）が収容されている。 The inner side of the cover 40 is partitioned by the base 11 accommodated in the cover 40, and a first space 47 is formed on the base 11 from the base main body 11 a to the small diameter end portion 41 side. In the first space 47, the electrical connecting portion 20 (specifically, the substrate 21, the lead pin 22, the connector 23, and the lead wire 24) is accommodated.

第１空間４７には、第１接着剤５１が充填、硬化されている。第１接着剤５１は、カバー４０やリード線２４との接着性が高く、且つ弾性が高い、例えば、エポキシ系接着剤が用いられる。 The first space 47 is filled and cured with the first adhesive 51. As the first adhesive 51, for example, an epoxy adhesive is used which has high adhesiveness to the cover 40 and the lead wire 24 and high elasticity.

第１接着剤５１は、第１空間４７に充填後硬化されることにより、基板２１、リードピン２２、コネクタ２３及びリード線２４が埋設状態になり、これらのパーツをカバー４０内に封止する。 When the first adhesive 51 is filled in the first space 47 and cured, the substrate 21, the lead pin 22, the connector 23, and the lead wire 24 are embedded, and these parts are sealed in the cover 40.

小径端部４１は大径端部４２より縮径して形成されており、且つ小径端部４１は内周において第１空間４７内に突出する突出部４１ａが形成されているため、第１空間４７内の充填物である第１接着剤５１に対して抜け止め作用を発揮する。これにより、第１接着剤５１が第１空間４７から剥がれてカバー４０の外部に抜け出ることが阻止され、カバー４０に対するリード線２４の確実な固定及び更なる気密性の確保を図ることができる。また、ベース１１が嵌合されるカバー４０の大径端部４２の環状段部４２ａにおいて、第１接着剤５１がベース１１とカバー４０とを接着する構造にすれば、更にベース１１の固定強度が上昇し、気密性を高めて外部からの液体侵入に対する封止効果も高められる。 The small-diameter end portion 41 is formed with a diameter smaller than that of the large-diameter end portion 42, and the small-diameter end portion 41 is formed with a protruding portion 41a that protrudes into the first space 47 on the inner periphery. The first adhesive 51 which is the filling in 47 exhibits a retaining action. Accordingly, the first adhesive 51 is prevented from being peeled off from the first space 47 and coming out of the cover 40, and the lead wire 24 can be securely fixed to the cover 40 and further airtight can be secured. Further, if the first adhesive 51 adheres the base 11 and the cover 40 at the annular step 42a of the large-diameter end portion 42 of the cover 40 to which the base 11 is fitted, the fixing strength of the base 11 is further increased. As a result, the airtightness is increased and the sealing effect against liquid intrusion from the outside is enhanced.

カバー４０の大径端部４２の図中下方の開口付近には、第２空間４８が形成されている。この第２空間４８は、環状隙間４５及び開き空間４６を含んで構成されている。 A second space 48 is formed in the vicinity of the lower opening of the large-diameter end portion 42 of the cover 40 in the drawing. The second space 48 includes an annular gap 45 and an open space 46.

環状隙間４５は、上述したようにベース１１の鍔部１１ｂの外周面１１ｆ及びベース１１に溶接された受け部材１２の鍔部１２ｂの周面１２ｄとこれらの外周面１１ｆ及び周面１２ｄに対向する大径端部４２の筒状内周面４２ｂとの間に形成されている比較的幅の狭い環状空間である。 As described above, the annular gap 45 faces the outer peripheral surface 11f of the flange portion 11b of the base 11 and the peripheral surface 12d of the flange portion 12b of the receiving member 12 welded to the base 11, and the outer peripheral surface 11f and the peripheral surface 12d. This is a relatively narrow annular space formed between the large-diameter end portion 42 and the cylindrical inner peripheral surface 42b.

開き空間４６は、環状隙間４５に連なる空間であって、受け部材１２の鍔部１２ｂの周面１２ｄに連なる環状下面１２ｅ、この環状下面１２ｅに連なる外側テーパ周面１２ｆ、及び、この外側テーパ周面１２ｆに連なる受け部材１２の受け部材本体１２ａの環状下面１２ｇと、大径端部４２の筒状内周面４２ｂの開口端側部分及びそれに連なる傾斜端面４２ｃと、継手部３０の一端部の端面３０ｂと、によって囲まれる空間である。 The open space 46 is a space that is continuous with the annular gap 45, and includes an annular lower surface 12 e that is continuous with the peripheral surface 12 d of the flange 12 b of the receiving member 12, an outer tapered peripheral surface 12 f that is continuous with this annular lower surface 12 e, and this outer tapered periphery. An annular lower surface 12g of the receiving member main body 12a of the receiving member 12 connected to the surface 12f, an opening end side portion of the cylindrical inner peripheral surface 42b of the large diameter end portion 42 and an inclined end surface 42c connected thereto, and one end portion of the joint portion 30 A space surrounded by the end face 30b.

第２空間４８には、第２接着剤５２が充填される。即ち、図１において第２接着剤５２が充填されている空間が第２空間４８である。この第２接着剤５２は、ステンレス製のベース１１や受け部材１２、銅製の継手部３０及び合成樹脂製のカバー４０との接着性が高く且つ弾性の高い、エポキシ系接着剤が用いられている。または、第２接着剤５２は、ウレタン系接着剤又はシリコーン系接着剤でもよい。 The second space 48 is filled with the second adhesive 52. That is, the space filled with the second adhesive 52 in FIG. As the second adhesive 52, an epoxy adhesive having high adhesiveness and high elasticity to the stainless base 11, the receiving member 12, the copper joint 30, and the synthetic resin cover 40 is used. . Alternatively, the second adhesive 52 may be a urethane-based adhesive or a silicone-based adhesive.

継ぎ手部３０は銅（又は銅合金、合成樹脂）を材料として構成されているので、継ぎ手部３０とエポキシ系接着剤、ウレタン系接着剤又はシリコーン系接着剤の第２接着剤５２との界面の耐水性（具体的には、当該界面への水分の浸入しにくさ）は比較的高い。また、受け部材１２はステンレス（又はアルミニウム）を材料として構成されているので、受け部材１２と第２接着剤５２との界面の耐水性は、銅製の継ぎ手部３０と第２接着剤５２との界面の耐水性に比べて低い。 Since the joint portion 30 is made of copper (or copper alloy, synthetic resin) as a material, the interface portion between the joint portion 30 and the second adhesive 52 of the epoxy adhesive, urethane adhesive, or silicone adhesive is used. The water resistance (specifically, the difficulty of entering water into the interface) is relatively high. In addition, since the receiving member 12 is made of stainless steel (or aluminum), the water resistance at the interface between the receiving member 12 and the second adhesive 52 is determined between the copper joint portion 30 and the second adhesive 52. Low compared to the water resistance of the interface.

第２接着剤５２は、第２空間４８に充填されることにより、（１）受け部材１２の外表面全体である鍔部１２ｂの周面１２ｄ、環状下面１２ｅ及び外側テーパ周面１２ｆ、並びに、受け部材本体１２ａの環状下面１２ｇと、（２）カバー４０における受け部材１２の外表面に隣接する箇所である大径端部４２の筒状内周面４２ｂ及び傾斜端面４２ｃと、（３）継手部３０における受け部材１２の外表面に隣接する箇所であるその一端部の端面３０ｂと、にまたがってそれらを覆うように設けられている。つまり、第２接着剤５２は、少なくとも受け部材１２の外表面全体及び継ぎ手部３０における受け部材１２の外表面に隣接する箇所を覆う（被覆する）ように設けられている。 When the second adhesive 52 is filled in the second space 48, (1) the peripheral surface 12d of the flange 12b, which is the entire outer surface of the receiving member 12, the annular lower surface 12e, the outer tapered peripheral surface 12f, and An annular lower surface 12g of the receiving member main body 12a, (2) a cylindrical inner peripheral surface 42b and an inclined end surface 42c of the large-diameter end portion 42 that are adjacent to the outer surface of the receiving member 12 in the cover 40, and (3) a joint. The portion 30 is provided so as to cover the end surface 30b of the one end portion which is a portion adjacent to the outer surface of the receiving member 12 in the portion 30. That is, the second adhesive 52 is provided so as to cover (cover) at least the entire outer surface of the receiving member 12 and a portion adjacent to the outer surface of the receiving member 12 in the joint portion 30.

そして、第２接着剤５２は、第２空間４８に充填後硬化されることにより、カバー４０の大径端部４２の筒状内周面４２ｂとベース１１の外周面１１ｆ及び受け部材１２の周面１２ｄとの間を封止するように接着するので、ベース１１及び受け部材１２とカバー４０との固定強度やそれら間の密封性が更に高められる。 The second adhesive 52 is filled in the second space 48 and cured, so that the cylindrical inner peripheral surface 42b of the large-diameter end portion 42 of the cover 40, the outer peripheral surface 11f of the base 11, and the periphery of the receiving member 12 are obtained. Since bonding is performed so as to seal between the surface 12d, the fixing strength of the base 11 and the receiving member 12 and the cover 40 and the sealing performance between them are further enhanced.

また、第２接着剤５２は、受け部材１２の外表面全体及びカバー４０及び継手部３０における受け部材１２に隣接する箇所にまたがってそれらを覆うように設けられているので、ステンレス製の受け部材１２と第２接着剤５２との界面（境界）が露出せず、合成樹脂製のカバー４０と第２接着剤５２との界面及び銅製の継手部３０と第２接着剤５２との界面が露出される。これにより、ステンレス製の受け部材１２と第２接着剤５２との界面に直接水分が触れることがない。つまり、圧力検知ユニット１の容器１０は、ステンレス製の受け部材１２と第２接着剤５２との界面の耐水性ではなく、銅製の継手部３０と第２接着剤５２との界面の耐水性によって、その全体の防水性が定まる。 In addition, since the second adhesive 52 is provided so as to cover the entire outer surface of the receiving member 12 and a portion of the cover 40 and the joint portion 30 adjacent to the receiving member 12, the second adhesive 52 is made of stainless steel. 12 and the second adhesive 52 are not exposed, and the interface between the synthetic resin cover 40 and the second adhesive 52 and the interface between the copper joint 30 and the second adhesive 52 are exposed. Is done. Thereby, moisture does not directly touch the interface between the stainless steel receiving member 12 and the second adhesive 52. That is, the container 10 of the pressure detection unit 1 is not water-resistant at the interface between the stainless steel receiving member 12 and the second adhesive 52 but is water-resistant at the interface between the copper joint 30 and the second adhesive 52. The overall waterproofness is determined.

以上、説明したように、本実施形態の圧力検知ユニット１の容器１０は、流管接続部材としての受け部材１２と、受け部材１２に隣接して設けられた流管部材としての継手部３０と、受け部材１２に接して設けられた第２接着剤５２と、を有している。そして、継手部３０が、この継手部３０と第２接着剤５２との界面の耐水性が受け部材１２と第２接着剤５２との界面の耐水性より高くなるように、受け部材１２と異なる材料で構成され、第２接着剤５２が、受け部材１２の外表面全体及び継手部３０における受け部材１２の外表面に隣接する箇所を覆うように設けられている。 As described above, the container 10 of the pressure detection unit 1 of the present embodiment includes the receiving member 12 as the flow tube connecting member and the joint portion 30 as the flow tube member provided adjacent to the receiving member 12. And a second adhesive 52 provided in contact with the receiving member 12. The joint portion 30 is different from the receiving member 12 so that the water resistance at the interface between the joint portion 30 and the second adhesive 52 is higher than the water resistance at the interface between the receiving member 12 and the second adhesive 52. It is comprised with material and the 2nd adhesive agent 52 is provided so that the location adjacent to the outer surface of the receiving member 12 in the whole outer surface of the receiving member 12 and the coupling part 30 may be covered.

また、受け部材１２を構成する材料が、ステンレスである。 The material constituting the receiving member 12 is stainless steel.

また、継手部３０を構成する材料が、銅である。 Moreover, the material which comprises the coupling part 30 is copper.

また、第２接着剤５２が、エポキシ系接着剤である。 The second adhesive 52 is an epoxy adhesive.

また、本実施形態の圧力検知ユニット１は、上述した容器１０を備えている。 Moreover, the pressure detection unit 1 of this embodiment is provided with the container 10 mentioned above.

本実施形態によれば、継手部３０が、この継手部３０と第２接着剤５２との界面の耐水性が受け部材１２と第２接着剤５２との界面の耐水性より高くなるように、受け部材１２と異なる材料で構成され、第２接着剤５２が、受け部材１２の外表面全体及び継手部３０における受け部材１２の外表面に隣接する箇所を覆うように設けられている。そのため、受け部材１２と第２接着剤５２との界面（境界）が露出されずに、継手部３０と第２接着剤５２との界面が露出され、そして、この露出された継手部３０と第２接着剤５２との界面は、受け部材１２と第２接着剤５２との界面より耐水性が高くされており、これにより、各部材と接着剤との露出される界面の耐水性を高めて防水性を向上できる。 According to the present embodiment, the joint portion 30 has a higher water resistance at the interface between the joint portion 30 and the second adhesive 52 than the water resistance at the interface between the receiving member 12 and the second adhesive 52. The second adhesive 52 is made of a material different from that of the receiving member 12 and is provided so as to cover the entire outer surface of the receiving member 12 and a portion of the joint portion 30 adjacent to the outer surface of the receiving member 12. Therefore, the interface (boundary) between the receiving member 12 and the second adhesive 52 is not exposed, and the interface between the joint part 30 and the second adhesive 52 is exposed, and the exposed joint part 30 and the second adhesive 52 are exposed. The interface between the two adhesives 52 is higher in water resistance than the interface between the receiving member 12 and the second adhesive 52, thereby increasing the water resistance of the exposed interface between each member and the adhesive. Waterproofness can be improved.

以上、本発明について、好ましい実施形態を挙げて説明したが、本発明の圧力検知ユニットは上記実施形態の構成に限定されるものではない。 While the invention has been described by way of preferred embodiments, pressure sensing unit of the present invention is not limited to the configuration of the above embodiment.

例えば、上述した実施形態では、容器１０に図示しない流体導入管が接続される継手部３０を含む構成であったが、これに限定されるものではなく、例えば、図２に示すように、継手部３０に代えて、流管部材としての合成樹脂、銅又は銅合金（真鍮など）製の流体導入管３５を流管接続部材である受け部材１２に直接ロウ付けして取り付けた構成の圧力検知ユニット１Ａとしてもよい。図２は、図１の圧力検知ユニットの変形例の構成を示す縦断面図である。 For example, in the above-described embodiment, the configuration includes the joint portion 30 to which the fluid introduction pipe (not shown) is connected to the container 10. However, the present invention is not limited to this. For example, as shown in FIG. In place of the portion 30, pressure detection of a configuration in which a fluid introduction pipe 35 made of synthetic resin, copper, or a copper alloy (such as brass) as a flow pipe member is directly brazed and attached to the receiving member 12 which is a flow pipe connection member. It is good also as unit 1A. FIG. 2 is a longitudinal sectional view showing a configuration of a modification of the pressure detection unit of FIG.

この構成の場合、第２接着剤５２は、（１）受け部材１２の外表面全体である鍔部１２ｂの周面１２ｄ、環状下面１２ｅ及び外側テーパ周面１２ｆ、並びに、受け部材本体１２ａの環状下面１２ｇと、（２）カバー４０における受け部材１２の外表面に隣接する箇所である大径端部４２の筒状内周面４２ｂ及び傾斜端面４２ｃと、（３’）流体導入管３５における受け部材１２の外表面に隣接する箇所であるその一端部のフランジ状外周面３５ａと、にまたがってそれらを覆うように設けられる。つまり、第２接着剤５２は、少なくとも受け部材１２の外表面全体及び流体導入管３５における受け部材１２の外表面に隣接する箇所を覆う（被覆する）ように設けられる。これにより、受け部材１２と第２接着剤５２との界面（境界）が露出されずに、流体導入管３５と第２接着剤５２との界面が露出され、上述した実施形態と同様の効果を奏する。 In the case of this configuration, the second adhesive 52 is (1) the peripheral surface 12d of the flange 12b, the annular lower surface 12e and the outer tapered peripheral surface 12f, which is the entire outer surface of the receiving member 12, and the annular shape of the receiving member main body 12a. A lower surface 12g, (2) a cylindrical inner peripheral surface 42b and an inclined end surface 42c of the large-diameter end 42 that are adjacent to the outer surface of the receiving member 12 in the cover 40, and (3 ′) a receiver in the fluid introduction pipe 35. It is provided so as to cover the flange-like outer peripheral surface 35a at one end thereof, which is a portion adjacent to the outer surface of the member 12, and to cover them. That is, the second adhesive 52 is provided so as to cover (cover) at least the entire outer surface of the receiving member 12 and a portion of the fluid introduction pipe 35 adjacent to the outer surface of the receiving member 12. Thereby, the interface (boundary) between the receiving member 12 and the second adhesive 52 is not exposed, and the interface between the fluid introduction pipe 35 and the second adhesive 52 is exposed, and the same effect as the above-described embodiment is obtained. Play.

また、上述した実施形態では、ベース１１、受け部材１２及びダイヤフラム１３からなる構成体、並びに、電気接続部２０がカバー４０に収容された構成であったが、これに限定されるものではない。例えば、カバー４０を備えずに、単一の接着剤で、上記構成体及び電気接続部２０を覆う構成としてもよい。この場合、上記接着剤は、少なくとも、それぞれステンレス製のベース１１、受け部材１２及びダイヤフラム１３からなる上記構成体（第１部分に相当）全体、及び、継手部３０（第２部分に相当）における上記構成体（具体的には受け部材１２）に隣接する箇所を覆うように設けられる。勿論、電気接続部２０についても何らかの防水対策を施す必要がある。これにより、ステンレス製の上記構成体とそれを覆う上記接着剤との界面（境界）が露出されずに、継手部３０と上記接着剤との界面が露出され、上述した実施形態と同様の効果を奏する。 In the above-described embodiment, the structure including the base 11, the receiving member 12, and the diaphragm 13, and the electrical connection unit 20 are accommodated in the cover 40. However, the present invention is not limited to this. For example, it is good also as a structure which does not provide the cover 40 but covers the said structure and the electrical connection part 20 with a single adhesive agent. In this case, the adhesive is at least in the entire structure (corresponding to the first part) and the joint part 30 (corresponding to the second part) each made of a stainless base 11, a receiving member 12 and a diaphragm 13. It is provided so that the location adjacent to the said structure (specifically receiving member 12) may be covered. Of course, it is necessary to take some waterproof measures for the electrical connection portion 20 as well. As a result, the interface (boundary) between the stainless steel structure and the adhesive covering the stainless steel is not exposed, and the interface between the joint portion 30 and the adhesive is exposed. Play.

また、上述した実施形態では、圧力センサや圧力スイッチなどに応用可能な圧力検知ユニット１について説明するものであったが、本発明はこれに限定されるものではなく、圧力検知ユニット以外に適用されてもよい。つまり、本発明は、第１部分と、この第１部分に隣接して設けられた第２部分と、第１部分に接して設けられた接着剤と、を有するケース、及び、それを有するものであれば、本発明の目的に反しない限り、適用可能である。 In the above-described embodiment, the pressure detection unit 1 that can be applied to a pressure sensor, a pressure switch, or the like has been described. However, the present invention is not limited to this, and is applied to other than the pressure detection unit. May be. That is, the present invention includes a case having a first portion, a second portion provided adjacent to the first portion, and an adhesive provided in contact with the first portion, and the case having the same. As long as the object of the present invention is not violated, it is applicable.

なお、前述した実施形態は本発明の代表的な形態を示したに過ぎず、本発明は、実施形態に限定されるものではない。即ち、当業者は、従来公知の知見に従い、本発明の骨子を逸脱しない範囲で種々変形して実施することができる。かかる変形によってもなお本発明の圧力検知ユニットの構成を具備する限り、勿論、本発明の範疇に含まれるも
のである。 In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, those skilled in the art can implement various modifications in accordance with conventionally known knowledge without departing from the scope of the present invention. As long as having a configuration of a pressure sensing unit of the still present invention by such modifications, of course, are intended to be included within the scope of the present invention.

１圧力検知ユニット
１０容器（ケース）
１１ベース
１２受け部材（流管接続部材、第１部分）
１３ダイヤフラム
１４圧力検知素子
１７受圧空間
１８加圧空間
２０電気接続部
２１基板
２２リードピン
２３コネクタ
２４リード線
３０継手部（流管部材、第２部分）
３５流体導入管（流管部材、第２部分）
４０カバー
４７第１空間
４８第２空間
５１第１接着剤
５２第２接着剤（接着剤） 1 Pressure detection unit 10 Container (case)
11 Base 12 Receiving member (flow pipe connecting member, first part)
DESCRIPTION OF SYMBOLS 13 Diaphragm 14 Pressure sensing element 17 Pressure receiving space 18 Pressurizing space 20 Electrical connection part 21 Board | substrate 22 Lead pin 23 Connector 24 Lead wire 30 Joint part (flow pipe member, 2nd part)
35 Fluid introduction pipe (flow pipe member, second part)
40 Cover 47 First Space 48 Second Space 51 First Adhesive 52 Second Adhesive (Adhesive)

Claims

A container having: a flow tube connecting member; a flow tube member provided adjacent to the flow tube connecting member; an adhesive provided in contact with the flow tube connecting member; and a cylindrical cover. A pressure sensing unit,
Said flow tube member, so that the water resistance of the interface between the said flow tube member wherein said adhesive is higher than the water resistance of the interface between the adhesive and the flow tube connecting members, different from the flow tube connecting member material Consists of
The flow tube connecting member is disposed inside the cover and the flow tube member is disposed so as to protrude from one end of the cover,
The adhesive is filled in the one end of the cover so as to cover at least the entire outer surface of the flow tube connecting member and a portion of the flow tube member adjacent to the outer surface of the flow tube connecting member. A pressure detection unit characterized by

The pressure detection unit according to claim 1, wherein the material constituting the flow tube connecting member is stainless steel or aluminum.

The pressure detection unit according to claim 1 or 2, wherein the material constituting the flow tube member is a synthetic resin, copper, or a copper alloy.

The pressure detection unit according to any one of claims 1 to 3, wherein the adhesive is an epoxy adhesive, a urethane adhesive, or a silicone adhesive.