JP4635391B2 - Pressure sensor mounting structure - Google Patents

Pressure sensor mounting structure Download PDF

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Publication number
JP4635391B2
JP4635391B2 JP2001235397A JP2001235397A JP4635391B2 JP 4635391 B2 JP4635391 B2 JP 4635391B2 JP 2001235397 A JP2001235397 A JP 2001235397A JP 2001235397 A JP2001235397 A JP 2001235397A JP 4635391 B2 JP4635391 B2 JP 4635391B2
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Prior art keywords
pressure
pressure sensor
case
sensor
mounting hole
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JP2001235397A
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JP2003042882A (en
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浩一 服部
修也 三上
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Denso Corp
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Denso Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、圧力センサが装着される装着体の外部表面に取付けられる圧力センサの取付け構造に関する。
【０００２】
【従来の技術】
従来より、圧力センサが装着される装着体の外部表面に取付けられる圧力センサの取付け構造として、装着体の外部表面にネジ等の締結手段が構成され、この締結手段を用いて圧力センサが有するフランジ部等がネジ締結されて圧力センサが取付けられている。
【０００３】
【発明が解決しようとする課題】
しかし、ネジ等の締結手段では、ネジ部品を必要とし部品点数が増える。また、ネジ等を締め付ける作業が必要であり、かつこの締付け作業の組付け性が悪く圧力センサの取付けがコスト負担増となって問題である。
【０００４】
本発明の目的は上記の点に鑑み、部品点数が削減でき、組付け性が向上する圧力センサの取付け構造を提供することにある。
【０００５】
【課題を解決するための手段】
上述した課題を解決するために、本発明の請求項１記載の圧力センサの取付け構造によると、圧力センサが装着される装着体が樹脂材により形成され、この装着体の外部表面より突設されるように形成されるスナップフィット部を１個のみ備える。また、ケースは、圧力導入管がセンサ装着穴部に挿入される方向と平行となる形状の鍔部が一体に形成され、装着体の外部表面には、圧力導入管がセンサ装着穴部に挿入されるときに鍔部を挟むように案内して挟持する案内壁が突出して設けられる。そして、スナップフィット部は、ケースを圧力導入管がセンサ装着穴部に挿入される方向に拘持して外部表面に取付け固定することを特徴とする。なお、スナップフィット部とは、一方に突起を、他方にアンダーカットをもたせて上記した拘持する機能をもたせるものであり、拘持（固定）ばかりではなく着脱を行なうことができる。
【０００６】
それにより、装着体の外部表面に備えたスナップフィット部によって圧力センサ（ケース）の圧力導入管がセンサ装着穴部に挿入される方向に拘持される。一方、圧力センサ（ケース）の外部表面上における前後および左右方向の移動は、圧力導入管のセンサ装着穴部への挿入により制止されている。つまり、圧力センサは、装着体の外部表面上にその位置を前後、左右、上下の各方向に位置を安定させて固定されるので、ネジ等の追加部品を要することなくかつ取付け方もネジ等の締付けに比べ容易となる。つまり、部品点数が削減でき、組付け性が向上する圧力センサの取付け構造を提供できる。
【０００７】
また、ケースは、圧力導入管がセンサ装着穴部に挿入される方向と平行となる形状の鍔部が一体に形成され、外部表面には、圧力導入管がセンサ装着穴部に挿入されるときに鍔部を挟むように案内して挟持する案内壁が突出して設けられることを特徴とする。
【０００８】
それにより、案内壁が鍔部を挟むように案内して挟持し、装着体の外部表面上における圧力センサ位置の前後および左右方向の動きを強固に制止させる。よって、スナップフィット部による圧力センサの圧力導入管がセンサ装着穴部に挿入される方向の拘持を安定させることができる。つまり、圧力センサの前後および左右方向の僅かな動きによる圧力センサの傾きを無くし、スナップフィット部がケースから外れるのを抑止させる。
【０００９】
【発明の実施の形態】
以下、本発明の複数の実施形態を図に基づいて説明する。なお、以下説明する圧力センサの取付け構造は、装着体の外部表面に取付けられる圧力センサの取付け構造として装着体の外部表面にネジ等の締結手段を用いることなく、部品点数が削減でき、組付け性が向上する圧力センサの取付け構造を提供できる技術に関する。
【００１０】
（第１実施形態）
図１は、本発明の第１実施形態となる圧力センサの取付け構造を示す構成図であり、図１（ａ）は、部分断面図、図１（ｂ）は、図１（ａ）を上方から見た上面図である。
【００１１】
圧力センサ１は、例えばダイアフラムのような圧力応動変位部材や半導体素子等より構成される圧力検出部（図示しない）を含む部品が収容される樹脂製ケース２と、このケース２から外部に突出する圧力導入管３とを有している。そして、圧力が検出される装着体としてのサージタンク４はナイロン系樹脂等の樹脂材により形成され、このサージタンク４の外部表面４ａに開口するセンサ装着穴部５を備える。前記したセンサ装着穴部５に圧力導入管３が挿入され、圧力導入管３の先端部がセンサ装着穴部５内に開口してセンサ装着穴部５内の圧力をケース２内の圧力応動変位部材（図示しない）の部位まで導く構成である。なお、圧力導入管３の外周部とセンサ装着穴部５の内周部間にシール部材としてのＯリング６を介在させて、サージタンク４外部との通気をシールしている。また、７は、コネクタであり、圧力検出部の検出する検出信号を内燃機関用電子制御装置（図示しない）に送信する。
【００１２】
外部表面４ａより突設されるように形成されるスナップフィット部８を２個備える。この２個のスナップフィット部８は、ともに一方に突起部８ａを、他方にアンダーカット部８ｂを備えている。そして、センサ装着穴部５に圧力導入管３が挿入されたのちケース２の底面２ａが外部表面４ａに当接して圧力センサ１が外部表面４ａ上に位置決めされる際、スナップフィット部８の突起部８ａがケース２を圧力導入管３がセンサ装着穴部５に挿入される方向に拘持するのである。詳細には、突起部８ａがケース２の底面２ａと平行に位置するケース２の上面２ｂを係止させる構成である。なお、このスナップフィット部８は、ケース２を拘持（固定）するばかりではなく着脱を行なうことができる。本実施形態では、スナップフィット部８がケース２を両側から挟む位置に対向させて配設した。しかし、スナップフィット部８は、少なくとも１個備えればケース２を圧力導入管３がセンサ装着穴部５に挿入される方向に拘持できる（後述説明する）。但し、スナップフィット部８を複数備えれば、より強固にケース２を拘持できる。
【００１３】
次に、図２を用いて圧力センサ１がサージタンク４に取付け固定される行程を説明する。図２（ａ）は、圧力センサ１の取付け固定前状態を示し、図２（ｂ）は、圧力センサ１の取付け固定される途中を示し、図２（ｃ）は、圧力センサ１の取付け固定後を示す。
【００１４】
圧力センサ１は、センサ装着穴部５に圧力導入管３が挿入されるように図２（ａ）の状態から図２（ｂ）の状態へと、図２中の上方から下方へ押し下げられるように組付けられる。この圧力センサ１の押し下げ行程（図２（ｂ））において、突起部８ａがケース２により湾曲されて２個のスナップフィット部８の突起部８ａ間の距離を大きくするように押し広げられる。そして、ケース２の底面２ａが外部表面４ａに当接し、圧力センサ１が外部表面４ａ上に位置決めされるとほぼ同時に、押し広げられたスナップフィット部８が図２（ａ）に示す元の状態に戻り、突起部８ａがケース２の上面２ｂを係止するように位置する。この突起部８ａの動きは、スナップフィット部８が弾性を有する樹脂材（ナイロン系樹脂等）により形成されていることによる。つまり、ケース２を間に配置させ、その対向位置に配設したスナップフィット部８の両突起部８ａは、ケース２を圧力導入管３がセンサ装着穴部５に挿入させる方向に拘持する。この状態を図２（ｃ）に示す。
【００１５】
このように、サージタンク４の外部表面４ａに備えたスナップフィット部８によって圧力センサ１の圧力導入管３がセンサ装着穴部５に挿入される方向に拘持される。一方、圧力センサ（ケース２）１の外部表面４ａ上における前後および左右方向の移動は、圧力導入管３のセンサ装着穴部５への挿入により制止されている。つまり、圧力センサ１は、装着体の外部表面４ａ上にその位置を前後、左右、上下の各方向に位置を安定させて固定されるので、ネジ等の追加部品を要することなくかつ取付け方もネジ等の締付けに比べ容易となる。つまり、部品点数が削減でき、組付け性が向上する圧力センサ１の取付け構造を提供できる。
【００１６】
（第２実施形態）
図３は、本発明の第２実施形態となる圧力センサ１Ａの取付け構造を示す斜視図であり、図３（ａ）は、圧力センサ１Ａの取付け固定前状態を示し、図３（ｂ）は、圧力センサ１Ａの取付け固定後を示す。図１および図２の第１実施形態と実質的に同一構成部品には同一符号を付し、説明を省略する。なお、図３は、図１および図２に示した圧力センサ１の取付け構造に対し、鍔部２０とこの鍔部２０を挟むように案内して挟持する案内壁２１を設け（後述する）、サージタンク２４の外部表面２４ａ上での圧力センサ１Ａの位置における前後および左右方向の動きを強固に制止させた点が異なる。また、図３中に示すサージタンク２４は、サージタンク２４の一部分を示すものである。
【００１７】
ケース２２には、圧力導入管２３がセンサ装着穴部２５に挿入される方向と平行となる形状の鍔部２０が一体に形成される。そして、サージタンク２４の外部表面２４ａには、圧力導入管２３がセンサ装着穴部２５に挿入されるときに鍔部２０を挟むように案内して挟持する案内壁２１が突出して設けられる。詳細には、鍔部２０は、ケース２２の側面端部（図３中Ａ部）に形成され、この側面端部から両方向に張り出すように形成され、この両方向に張り出した鍔部２０と対応する案内壁２１が形成される。
【００１８】
スナップフィット部２８は、第１実施形態と同様に突起部２８ａを有して外部表面２４ａより突設されるように形成され、スナップフィット部２８の突起部２８ａがケース２２の側面端部（図３中Ａ部）方向から圧力導入管２３をセンサ装着穴部２５に挿入させる方向にケース２２を拘持するように構成される。
【００１９】
このように、案内壁２１が鍔部２０を挟むように案内して挟持し、サージタンク２４の外部表面２４ａ上での圧力センサ１Ａの位置における前後および左右方向の動きを強固に制止させる。よって、スナップフィット部２８により圧力センサ１Ａの圧力導入管２３がセンサ装着穴部２５に挿入される方向の拘持を安定させることができる。つまり、鍔部２０および案内壁２１によって圧力センサ１Ａの前後および左右方向の僅かな動きによる圧力センサ１Ａの傾きを無くし、スナップフィット部２８がケース２２から外れるのを抑止させている。
【００２０】
なお、本発明の実施にあたり、装着体としてサージタンク２、２４の例を示したがこれに限定されることなく、圧力センサが取付け可能な略平面（外部表面４ａ、２４ａ等）を有していていれば本発明の圧力センサの取付け構造を実現できる。
【００２１】
また、本発明の実施にあたり、圧力センサ１が装着される装着体としてサージタンク４の例を示し、このサージタンク４の外部表面に開口するセンサ装着穴部５に直接圧力導入管３、２３を挿入させて圧力を検出した。しかし、圧力センサ１が装着される装着体は、上記したサージタンク４のようにその装着体そのものの内部圧力を検出する構成とは限らず、図４に示すように圧力センサ１を圧力が検出される被検出体３２とは異なる装着体３０に装着してもよい。この場合、例えば圧力導入管３と圧力が検出される被検出体３２とをセンサ装着穴部５の内部にてホース３１により連結させる構成とする。つまり、圧力センサ１が装着される装着体３０と圧力センサ１により圧力が検出される被検出体３２とを異ならせるのである。そして、装着体３０に第１実施形態と同要領にてスナップフィット部８備える。
【図面の簡単な説明】
【図１】本発明の第１実施形態となる圧力センサの取付け構造を示す構成図であり、
（ａ）は、部分断面図、
（ｂ）は、図１（ａ）を上方から見た上面図である。
【図２】圧力センサがサージタンクに取付け固定される行程を示す説明図であり、
（ａ）は、圧力センサの取付け固定前状態を示し、
（ｂ）は、圧力センサの取付け固定される途中を示し、
（ｃ）は、圧力センサの取付け固定後を示す。
【図３】本発明の第２実施形態となる圧力センサの取付け構造を示す斜視図であり、
（ａ）は、圧力センサの取付け固定前状態を示し、
（ｂ）は、圧力センサの取付け固定後を示す。
【図４】被検出体とは異なる装着体への圧力センサの取付けを示す構成図である。
【符号の説明】
１、１Ａ 圧力センサ
２、２２ ケース
３、２３ 圧力導入管
４、２４ サージタンク（装着体）
４ａ、２４ａ 外部表面
５、２５ センサ装着穴部
８、２８ スナップフィット部
２０ 鍔部
２１ 案内壁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressure sensor mounting structure that is mounted on an outer surface of a mounting body on which a pressure sensor is mounted.
[0002]
[Prior art]
Conventionally, as a pressure sensor mounting structure that is mounted on the outer surface of a mounting body to which the pressure sensor is mounted, a fastening means such as a screw is configured on the outer surface of the mounting body, and a flange that the pressure sensor has by using this fastening means The pressure sensor is attached by screwing the part and the like.
[0003]
[Problems to be solved by the invention]
However, a fastening means such as a screw requires a screw part and increases the number of parts. In addition, it is necessary to perform an operation of tightening a screw or the like, and the assembly performance of the tightening operation is poor, so that the mounting of the pressure sensor increases the cost burden.
[0004]
In view of the above points, an object of the present invention is to provide a pressure sensor mounting structure that can reduce the number of components and improve assemblability.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problem, according to the pressure sensor mounting structure of the first aspect of the present invention, the mounting body to which the pressure sensor is mounted is formed of a resin material and protrudes from the outer surface of the mounting body. Only one snap-fit portion formed so as to be provided. In addition, the case is integrally formed with a flange having a shape parallel to the direction in which the pressure introducing tube is inserted into the sensor mounting hole, and the pressure introducing tube is inserted into the sensor mounting hole on the outer surface of the mounting body. When this is done, a guide wall is provided protruding so as to guide and pinch the buttock. The snap-fit portion is characterized in that the case is attached and fixed to the outer surface while holding the case in the direction in which the pressure introducing tube is inserted into the sensor mounting hole. The snap-fit portion is provided with a protrusion on one side and an undercut on the other to have the above-described holding function, and can be attached and detached as well as holding (fixing).
[0006]
Thereby, the pressure introduction pipe of the pressure sensor (case) is held in the direction in which it is inserted into the sensor mounting hole by the snap fit portion provided on the outer surface of the mounting body. On the other hand, movement in the front-rear and left-right directions on the outer surface of the pressure sensor (case) is restrained by insertion of the pressure introduction pipe into the sensor mounting hole. In other words, the pressure sensor is fixed on the outer surface of the mounting body in a stable manner in the front / rear, left / right, and upper / lower directions. It becomes easier than tightening. That is, it is possible to provide a pressure sensor mounting structure in which the number of parts can be reduced and the ease of assembly can be improved.
[0007]
In addition, the case is integrally formed with a flange having a shape that is parallel to the direction in which the pressure introducing tube is inserted into the sensor mounting hole, and when the pressure introducing tube is inserted into the sensor mounting hole on the external surface A guide wall that guides and clamps so as to sandwich the collar portion is provided to protrude.
[0008]
As a result, the guide wall guides and holds the collar portion so as to sandwich the collar portion, and firmly restrains the movement of the pressure sensor position in the front-rear and left-right directions on the outer surface of the mounting body. Therefore, the holding in the direction in which the pressure introducing pipe of the pressure sensor by the snap fit portion is inserted into the sensor mounting hole portion can be stabilized. That is, the inclination of the pressure sensor due to slight movement of the pressure sensor in the front-rear and left-right directions is eliminated, and the snap-fit portion is prevented from being detached from the case.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. Note that the pressure sensor mounting structure described below is a pressure sensor mounting structure that can be mounted on the external surface of the mounting body, so that the number of parts can be reduced without using fastening means such as screws on the external surface of the mounting body. The present invention relates to a technology capable of providing a pressure sensor mounting structure with improved performance.
[0010]
(First embodiment)
FIG. 1 is a configuration diagram showing a pressure sensor mounting structure according to a first embodiment of the present invention. FIG. 1 (a) is a partial sectional view, and FIG. 1 (b) is a top view of FIG. 1 (a). It is the top view seen from.
[0011]
The pressure sensor 1 includes, for example, a resin case 2 in which a part including a pressure detection unit (not shown) including a pressure responsive displacement member such as a diaphragm, a semiconductor element, and the like is accommodated, and the case 2 protrudes to the outside. And a pressure introducing pipe 3. The surge tank 4 as a mounting body for detecting pressure is formed of a resin material such as nylon resin, and includes a sensor mounting hole 5 that opens on the outer surface 4a of the surge tank 4. The pressure introducing tube 3 is inserted into the sensor mounting hole 5 described above, and the tip of the pressure introducing tube 3 opens into the sensor mounting hole 5 so that the pressure in the sensor mounting hole 5 is displaced by pressure in the case 2. It is the structure which guides to the site | part of a member (not shown). Note that an O-ring 6 serving as a seal member is interposed between the outer peripheral portion of the pressure introducing pipe 3 and the inner peripheral portion of the sensor mounting hole portion 5 to seal the ventilation with the outside of the surge tank 4. Reference numeral 7 denotes a connector which transmits a detection signal detected by the pressure detector to an internal combustion engine electronic control device (not shown).
[0012]
Two snap fit portions 8 formed so as to protrude from the outer surface 4a are provided. The two snap fit portions 8 are each provided with a protruding portion 8a on one side and an undercut portion 8b on the other side. Then, after the pressure introducing tube 3 is inserted into the sensor mounting hole 5, the bottom surface 2a of the case 2 comes into contact with the outer surface 4a and the pressure sensor 1 is positioned on the outer surface 4a. The portion 8 a holds the case 2 in the direction in which the pressure introducing tube 3 is inserted into the sensor mounting hole 5. Specifically, the protrusion 8 a is configured to lock the upper surface 2 b of the case 2 positioned in parallel with the bottom surface 2 a of the case 2. The snap fit portion 8 can be attached and detached as well as holding (fixing) the case 2. In the present embodiment, the snap fit portion 8 is disposed so as to face the position sandwiching the case 2 from both sides. However, if at least one snap fit portion 8 is provided, the case 2 can be held in the direction in which the pressure introducing tube 3 is inserted into the sensor mounting hole 5 (described later). However, if a plurality of snap-fit portions 8 are provided, the case 2 can be held firmly.
[0013]
Next, the process of attaching and fixing the pressure sensor 1 to the surge tank 4 will be described with reference to FIG. 2A shows a state before the pressure sensor 1 is fixedly attached, FIG. 2B shows a state where the pressure sensor 1 is fixedly attached, and FIG. 2C shows that the pressure sensor 1 is fixedly attached. Shown later.
[0014]
The pressure sensor 1 is pushed down from the upper side in FIG. 2 from the state of FIG. 2A to the state of FIG. 2B so that the pressure introducing tube 3 is inserted into the sensor mounting hole 5. Assembled to. In the depression process of the pressure sensor 1 (FIG. 2B), the protrusion 8a is bent by the case 2 and is expanded so as to increase the distance between the protrusions 8a of the two snap fit portions 8. Then, when the bottom surface 2a of the case 2 comes into contact with the outer surface 4a and the pressure sensor 1 is positioned on the outer surface 4a, the expanded snap fit portion 8 is in the original state shown in FIG. Returning to FIG. 8, the protrusion 8 a is positioned so as to lock the upper surface 2 b of the case 2. The movement of the protrusion 8a is due to the snap fit portion 8 being formed of an elastic resin material (nylon resin or the like). That is, the two protrusions 8a of the snap fit portion 8 disposed in the opposite position with the case 2 interposed therebetween hold the case 2 in the direction in which the pressure introducing tube 3 is inserted into the sensor mounting hole 5. This state is shown in FIG.
[0015]
In this manner, the pressure introducing pipe 3 of the pressure sensor 1 is held in the direction in which it is inserted into the sensor mounting hole 5 by the snap fit portion 8 provided on the outer surface 4 a of the surge tank 4. On the other hand, the movement of the pressure sensor (case 2) 1 in the front-rear and left-right directions on the outer surface 4a is restrained by insertion of the pressure introduction pipe 3 into the sensor mounting hole 5. In other words, the pressure sensor 1 is fixed on the outer surface 4a of the mounting body in a stable position in the front-rear, left-right, and upper-lower directions, so that no additional parts such as screws are required and the mounting method is also easy. This is easier than tightening screws. That is, it is possible to provide an attachment structure for the pressure sensor 1 that can reduce the number of parts and improve the assemblability.
[0016]
(Second Embodiment)
FIG. 3 is a perspective view showing the mounting structure of the pressure sensor 1A according to the second embodiment of the present invention. FIG. 3A shows a state before the pressure sensor 1A is fixed, and FIG. FIG. 2 shows the pressure sensor 1A after being fixed. Components that are substantially the same as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted. 3 is provided with a flange 20 and a guide wall 21 for guiding and sandwiching the flange 20 with respect to the mounting structure of the pressure sensor 1 shown in FIGS. 1 and 2 (described later). The difference is that the movement of the pressure sensor 1A on the outer surface 24a of the surge tank 24 in the position of the pressure sensor 1A in the front-rear and left-right directions is firmly stopped. Moreover, the surge tank 24 shown in FIG. 3 shows a part of the surge tank 24.
[0017]
The case 22 is integrally formed with a flange 20 having a shape parallel to the direction in which the pressure introducing tube 23 is inserted into the sensor mounting hole 25. The outer surface 24a of the surge tank 24 is provided with a guide wall 21 that protrudes and guides and sandwiches the flange 20 when the pressure introducing tube 23 is inserted into the sensor mounting hole 25. Specifically, the flange portion 20 is formed on the side surface end portion (A portion in FIG. 3) of the case 22 and is formed so as to protrude from the side surface end portion in both directions, and corresponds to the flange portion 20 protruding in both directions. A guide wall 21 is formed.
[0018]
As in the first embodiment, the snap fit portion 28 has a protrusion 28a and is formed so as to protrude from the outer surface 24a, and the protrusion 28a of the snap fit portion 28 is a side end of the case 22 (see FIG. 3), the case 22 is held in the direction in which the pressure introducing tube 23 is inserted into the sensor mounting hole 25.
[0019]
In this manner, the guide wall 21 guides and holds the flange portion 20 so as to firmly restrain the front-rear and left-right movements at the position of the pressure sensor 1A on the outer surface 24a of the surge tank 24. Thus, the snap fit portion 28 can stabilize the holding in the direction in which the pressure introducing tube 23 of the pressure sensor 1A is inserted into the sensor mounting hole 25. That is, the flange portion 20 and the guide wall 21 eliminate the inclination of the pressure sensor 1A due to slight movements of the pressure sensor 1A in the front-rear and left-right directions, and prevent the snap-fit portion 28 from being detached from the case 22.
[0020]
In the implementation of the present invention, the example of the surge tanks 2 and 24 is shown as the mounting body. However, the present invention is not limited to this, and has a substantially flat surface (external surfaces 4a, 24a, etc.) to which the pressure sensor can be attached. If so, the mounting structure of the pressure sensor of the present invention can be realized.
[0021]
In the implementation of the present invention, an example of a surge tank 4 is shown as an attachment body to which the pressure sensor 1 is attached, and the pressure introduction pipes 3 and 23 are directly connected to the sensor attachment hole portion 5 opened on the outer surface of the surge tank 4. The pressure was detected by inserting. However, the mounting body to which the pressure sensor 1 is mounted is not necessarily configured to detect the internal pressure of the mounting body itself like the surge tank 4 described above, and the pressure is detected by the pressure sensor 1 as shown in FIG. You may mount | wear to the mounting body 30 different from the to-be-detected body 32 to be detected. In this case, for example, the pressure introduction pipe 3 and the detection object 32 whose pressure is detected are connected to each other by the hose 31 inside the sensor mounting hole 5. That is, the mounting body 30 to which the pressure sensor 1 is mounted is different from the detected body 32 whose pressure is detected by the pressure sensor 1. And the mounting body 30 is equipped with the snap fitting part 8 in the same way as 1st Embodiment.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a pressure sensor mounting structure according to a first embodiment of the present invention;
(A) is a partial sectional view,
(B) is the top view which looked at Fig.1 (a) from the upper direction.
FIG. 2 is an explanatory diagram showing a process in which a pressure sensor is attached and fixed to a surge tank;
(A) shows the state before fixing of the pressure sensor,
(B) shows the way the pressure sensor is mounted and fixed,
(C) shows after the pressure sensor is mounted and fixed.
FIG. 3 is a perspective view showing a pressure sensor mounting structure according to a second embodiment of the present invention;
(A) shows the state before fixing of the pressure sensor,
(B) shows after the pressure sensor is mounted and fixed.
FIG. 4 is a configuration diagram showing attachment of a pressure sensor to a mounting body different from a detection object.
[Explanation of symbols]
1, 1A Pressure sensor 2, 22 Case 3, 23 Pressure introducing pipe 4, 24 Surge tank (attached body)
4a, 24a External surface 5, 25 Sensor mounting hole 8, 28 Snap fit part 20 Gutter part 21 Guide wall

Claims (1)

圧力検出部を含む部品が収容されるケースと、該ケースから外部に突出する圧力導入管とを有する圧力センサと、
前記圧力センサが装着される装着体の外部表面に開口するセンサ装着穴部とを備え、
前記圧力導入管が前記センサ装着穴部に挿入される圧力センサの取付け構造において、
前記装着体は樹脂材により形成され、当該装着体の外部表面より突設されるように形成されるスナップフィット部を１個のみ備え、
前記ケースは、前記圧力導入管が前記センサ装着穴部に挿入される方向と平行となる形状の鍔部が一体に形成され、
前記装着体の外部表面には、前記圧力導入管が前記センサ装着穴部に挿入されるときに前記鍔部を挟むように案内して挟持する案内壁が突出して設けられ、
前記スナップフィット部は、前記ケースを前記圧力導入管が前記センサ装着穴部に挿入される方向に拘持して前記外部表面に取付け固定することを特徴とする圧力センサの取付け構造。A pressure sensor having a case in which components including a pressure detection unit are accommodated, and a pressure introduction pipe projecting outside from the case;
A sensor mounting hole that opens to the outer surface of the mounting body to which the pressure sensor is mounted;
In the pressure sensor mounting structure in which the pressure introducing tube is inserted into the sensor mounting hole,
The mounting body is formed of a resin material, and includes only one snap fit portion formed so as to protrude from the outer surface of the mounting body .
The case is integrally formed with a flange having a shape parallel to the direction in which the pressure introducing tube is inserted into the sensor mounting hole.
A guide wall is provided on the outer surface of the mounting body so as to project and guide the pressure introduction pipe so as to sandwich the flange when the pressure introducing tube is inserted into the sensor mounting hole.
The structure of attaching a pressure sensor, wherein the snap fit portion is attached and fixed to the outer surface by holding the case in a direction in which the pressure introducing tube is inserted into the sensor mounting hole.
JP2001235397A 2001-08-02 2001-08-02 Pressure sensor mounting structure Expired - Fee Related JP4635391B2 (en)

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