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JP4512478B2 - Case sealing structure - Google Patents
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JP4512478B2 - Case sealing structure - Google Patents

Case sealing structure Download PDF

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JP4512478B2
JP4512478B2 JP2004340787A JP2004340787A JP4512478B2 JP 4512478 B2 JP4512478 B2 JP 4512478B2 JP 2004340787 A JP2004340787 A JP 2004340787A JP 2004340787 A JP2004340787 A JP 2004340787A JP 4512478 B2 JP4512478 B2 JP 4512478B2
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cover member
housing case
case
plate
rotating body
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JP2006153501A (en
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俊一 中川
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Alps Alpine Co Ltd
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Alps Electric Co Ltd
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Description

本発明は、自動車のスロットルセンサ等に使用され、外部から伝達される回転角度を検出することができる回転型センサ等のケースの密閉構造に関する。   The present invention relates to a sealed structure of a case such as a rotary sensor that is used in a throttle sensor of an automobile and can detect a rotation angle transmitted from the outside.

従来のケースの密閉構造の一例としては、例えば、自動車のスロットルセンサ等に使用され、外部から伝達される回転角度を検出することができる回転型センサに関する特許文献1があり、これを図6乃至図8に示す。   An example of a conventional case sealing structure is, for example, Patent Document 1 relating to a rotation type sensor that is used in a throttle sensor of an automobile and can detect a rotation angle transmitted from the outside. As shown in FIG.

これらの図に示す回転型センサについて説明すると、筺体1は、合成樹脂の成型品からなるハウジングケース2と、このハウジングケース2の後方の開口部を塞ぐカバー部材3とで構成されている。   The rotary sensor shown in these drawings will be described. The housing 1 is composed of a housing case 2 made of a synthetic resin molded product, and a cover member 3 that closes the rear opening of the housing case 2.

そして、ハウジングケース2は、内部に収納部2aを有する筒状の側壁2bと、この側壁2bから収納部2a内に突出した2段状の筒部からなる受け部2cと、側壁2bの後方開口部側に設けられた2段の肩部2dと、側壁2bから直角方向に延びて形成された筒状部2eとを有する。   The housing case 2 includes a cylindrical side wall 2b having a storage portion 2a therein, a receiving portion 2c including a two-stage cylindrical portion protruding from the side wall 2b into the storage portion 2a, and a rear opening of the side wall 2b. It has a two-stage shoulder 2d provided on the part side and a cylindrical part 2e formed to extend in a direction perpendicular to the side wall 2b.

また、カバー部材3は、皿状をなし、板状部3aと、この板状部3aの外周部に設けられた鍔部3bと、板状部3aから前方に突出し、中央部に凹部3cが設けられた保持部3dとを有する。また、カバー部材3の鍔部3bには、内側(図の下方に行くほど)に狭まるテーパ部3e’が形成され、該テーパ部3e’でOリング13を挟み込むようにしている。   Further, the cover member 3 has a plate shape, a plate-like portion 3a, a flange portion 3b provided on the outer peripheral portion of the plate-like portion 3a, a front portion protruding from the plate-like portion 3a, and a concave portion 3c at the center portion. And a holding portion 3d provided. Further, a taper portion 3e 'that narrows inward (as it goes downward in the figure) is formed in the flange portion 3b of the cover member 3, and the O-ring 13 is sandwiched by the taper portion 3e'.

そして、このカバー部材3は、ハウジングケース2の後方の開口部側から肩部2dに載置され、図7に示すように肩部2dとテーパ部3e’と間にOリング13を挟み込み、Oリング13を押し潰した状態で、図6及び図8に示すようにハウジングケース2ハウジングケース2の側壁2bの曲げ部2fを熱カシメする等して、開口部を塞ぐようにハウジングケース2に取り付けられる。   The cover member 3 is placed on the shoulder 2d from the rear opening side of the housing case 2, and an O-ring 13 is sandwiched between the shoulder 2d and the tapered portion 3e ′ as shown in FIG. 6 and 8 with the ring 13 being crushed, the bent portion 2f of the side wall 2b of the housing case 2 is caulked, for example, as shown in FIGS. It is done.

金属材からなる複数の端子4は、コネクタ用に使用され、この端子4は、ハウジングケース2に埋設されて取り付けられ、一端がハウジングケース2の収納部2a内に突出すると共に、他端が筒状部2e内に突出した状態となっている。   A plurality of terminals 4 made of a metal material are used for a connector, and the terminals 4 are embedded and attached to the housing case 2, one end projects into the housing portion 2 a of the housing case 2, and the other end is a cylinder. It is in a state of protruding into the shape portion 2e.

金属材等からなる支持部5は、円柱状部5aと、この円柱状部5aの前方に設けられた円錐部5bとを有し、この支持部5は、円柱状部5aを凹部3cに挿入して、保持部3dによって保持されている。   The support portion 5 made of a metal material or the like has a columnar portion 5a and a conical portion 5b provided in front of the columnar portion 5a. The support portion 5 inserts the columnar portion 5a into the recess 3c. And it is hold | maintained by the holding | maintenance part 3d.

板状の絶縁基板6は、中心部に孔6aを有し、この絶縁基板6の一面には、ここでは図示しないが、抵抗体パターンと良導電体からなる集電体パターンが設けられており、そして、この抵抗体パターンと集電体パターンは、絶縁基板6に取り付けられた複数の端子部7に導通した状態となっている。また、この絶縁基板6は、外周部が肩部2dに載置され、孔6aが支持部5と対向した状態で、収納部2a内に収納され、この絶縁基板7は、ハウジングケース2に取り付けられたカバー部材3によって、外周部が肩部2dに押し付けられて、ハウジングケース2に取り付けられると共に、端子部6は、収納部2a内に突出したコネクタ用の端子4と半田接続されている。   The plate-like insulating substrate 6 has a hole 6a in the center, and a current collector pattern made of a resistor pattern and a good conductor is provided on one surface of the insulating substrate 6, although not shown here. The resistor pattern and the current collector pattern are electrically connected to a plurality of terminal portions 7 attached to the insulating substrate 6. The insulating substrate 6 is housed in the housing portion 2a with the outer peripheral portion placed on the shoulder 2d and the hole 6a facing the support portion 5. The insulating substrate 7 is attached to the housing case 2. The outer peripheral portion is pressed against the shoulder portion 2d by the cover member 3 so as to be attached to the housing case 2, and the terminal portion 6 is soldered to the connector terminal 4 protruding into the housing portion 2a.

合成樹脂の成型品からなる回転体8は、円板状部8aと、この円板状部8aの中央部から前方に突出した筒状の壁部8bと、この筒状の壁部8bの中央部に設けられた凹部8cと、壁部8bの両端の近傍に設けられた凹みからなる係合部8dと、凹部8cの底壁面から内壁面にかけて互いに一対向かい合うようにして形成された凸部8eと、円板状部8aの中央部から後方に突出する突部8fと、この突部8fの後端部に設けられた円錐状の穴部8gとを有する。   The rotating body 8 made of a synthetic resin molded product includes a disk-shaped portion 8a, a cylindrical wall portion 8b protruding forward from the central portion of the disk-shaped portion 8a, and the center of the cylindrical wall portion 8b. A concave portion 8c provided in the portion, an engaging portion 8d formed of a recess provided in the vicinity of both ends of the wall portion 8b, and a convex portion 8e formed to face each other from the bottom wall surface to the inner wall surface of the concave portion 8c. And a protruding portion 8f protruding rearward from the central portion of the disc-shaped portion 8a, and a conical hole portion 8g provided at the rear end portion of the protruding portion 8f.

そして、この回転体8は、ハウジングケース2の収納部2a内に収納され、筒状の壁部8bが受け部2c内に挿通されると共に、突部8fが絶縁基板6の孔6aに挿通され、凹部8gに円錐状部5bが嵌入して、回転体8は、回転可能に保持されると共に、突部8fによってピボット支持されて、傾倒可能になっている。また、この回転体8は、円板状部8aと受け部2cとの間に撓めた状態で配置されたウェーブワッシャー9によって、支持部5側に常時押圧されている。   The rotating body 8 is housed in the housing portion 2a of the housing case 2, the cylindrical wall portion 8b is inserted into the receiving portion 2c, and the projection 8f is inserted into the hole 6a of the insulating substrate 6. The conical portion 5b is fitted into the recess 8g, and the rotating body 8 is rotatably held and pivotally supported by the protrusion 8f so as to be tilted. The rotating body 8 is always pressed to the support portion 5 side by a wave washer 9 disposed in a bent state between the disc-shaped portion 8a and the receiving portion 2c.

摺動子10は、導電性のあるバネ板で形成され、この摺動子10は、円板状部8aの下面に取り付けられ、抵抗体パターンと集電体パターンに摺動可能となっている。そして、抵抗体パターンと集電体パターン、及び摺動子10とによって、回転角度を検出する回転型可変抵抗器からなる検出手段Kが構成されている。なお、この検出手段Kは、回転型可変抵抗器以外の回転型エンコーダ等で構成しても良い。   The slider 10 is formed of a conductive spring plate. The slider 10 is attached to the lower surface of the disk-shaped portion 8a, and can slide on the resistor pattern and the current collector pattern. . The resistor pattern, the current collector pattern, and the slider 10 constitute a detection means K including a rotary variable resistor that detects a rotation angle. The detecting means K may be constituted by a rotary encoder other than the rotary variable resistor.

バネ性ある材料からなるバネ部材11は、U字状に形成され、互いに対向する一対の第1のアーム部11a、第2のアーム部11bとを有する。   The spring member 11 made of a spring material is U-shaped and has a pair of first arm portion 11a and second arm portion 11b facing each other.

駆動軸12は、棒状の金属材から構成され、後方側の端部に挿入部12aを有し、この挿入部12aは、断面が略長方形状であり、一対の平坦面12bを有している。このような駆動軸12は、バネ部材11の第1,第2のアーム部11a、11b間に圧入され、回転体8の凹部8c内に収納される。そしてこの駆動軸12は、車両のスロットル弁と連動して回転するように車両本体に設けられている。
特開2003−97970公報
The drive shaft 12 is made of a rod-shaped metal material, and has an insertion portion 12a at an end on the rear side. The insertion portion 12a has a substantially rectangular cross section, and has a pair of flat surfaces 12b. . Such a drive shaft 12 is press-fitted between the first and second arm portions 11 a and 11 b of the spring member 11 and is housed in the recess 8 c of the rotating body 8. The drive shaft 12 is provided in the vehicle main body so as to rotate in conjunction with the throttle valve of the vehicle.
JP 2003-97970 A

このような従来のケースの密閉構造では、図6及び図8に示すように、Oリング13をハウジングケース2の肩部2dとカバー部材3のテーパ部3e’とで挟み込んで押し潰して密閉するようにしている。   In such a conventional case sealing structure, as shown in FIGS. 6 and 8, the O-ring 13 is sandwiched between the shoulder portion 2d of the housing case 2 and the taper portion 3e 'of the cover member 3 to be crushed and sealed. I am doing so.

このような状態であると、押し潰されたOリング13の元に戻ろうとする力F2がテーパ部3e’に図8に示すように内方斜め上方(テーパ部3e’に垂直方向)に作用している。一方、カバー部材3の周縁部の上端部は曲げ部2dによって上方のP点で押えられているため、カバー部材3の周縁部は、P点を中心にして力F2が作用してカバー部材3の板状部3aには反力Q2が発生し、これにより、カバー部材3の板状部3aの中央付近を上方(矢印A方向)に膨出させることになる。また、支持部5等からなる軸受け部による摩擦等により、カバー部材3が熱膨張することによりカバー部材3の板状部3aの中央付近のA方向への変位が加わり、カバー部材3の板状部3aのA方向への変位量はさらに大きなものとなっていた。   In such a state, the force F2 for returning to the original state of the crushed O-ring 13 acts on the taper portion 3e 'diagonally upward (perpendicular to the taper portion 3e') as shown in FIG. is doing. On the other hand, since the upper end portion of the peripheral portion of the cover member 3 is pressed at the upper point P by the bent portion 2d, the peripheral portion of the cover member 3 acts on the cover member 3 with the force F2 acting around the P point. A reaction force Q2 is generated in the plate-like portion 3a, and this causes the vicinity of the center of the plate-like portion 3a of the cover member 3 to bulge upward (in the direction of arrow A). Further, the cover member 3 is thermally expanded due to friction caused by a bearing portion including the support portion 5 and the like, so that a displacement in the A direction near the center of the plate-like portion 3a of the cover member 3 is applied, and the plate-like shape of the cover member 3 is thus increased. The amount of displacement of the portion 3a in the A direction was even larger.

また、カバー部材3の内面の保持部3dにウエーブワッシャー9の力が回転体8の及び支持部5を介して矢印A方向に掛かっているため、一層、矢印A方向にカバー部材3の板状部3aの中央が膨出される。   Further, since the force of the wave washer 9 is applied to the holding portion 3d on the inner surface of the cover member 3 in the direction of the arrow A via the rotating body 8 and the support portion 5, the plate shape of the cover member 3 is further increased in the direction of the arrow A. The center of the part 3a bulges out.

このようにカバー部材3の板状部3aの中央付近が膨出されると、カバー部材3の保持部3dの支持部5が、回転体8の軸方向に変位するため、回転体8に設けられた摺動子と、絶縁基板6の回路パターンとの位置関係が変動してセンサの出力値が変化してしまい、正常な出力が得られなくなるという問題があった。   When the vicinity of the center of the plate-like portion 3a of the cover member 3 is thus bulged, the support portion 5 of the holding portion 3d of the cover member 3 is displaced in the axial direction of the rotary member 8, and thus is provided on the rotary member 8. As a result, the positional relationship between the slider and the circuit pattern of the insulating substrate 6 fluctuates, and the output value of the sensor changes, and a normal output cannot be obtained.

また、上述したように、カバー部材3が容易に変形し得るとなると、カバー部材3のテーパ部3e’によるOリング13の圧縮が十分でなくなり、Oリング13によるシールが不完全となって塵等が侵入したり、カバー部材3が外れたりする虞れもあった。   Further, as described above, when the cover member 3 can be easily deformed, the compression of the O-ring 13 by the taper portion 3e ′ of the cover member 3 becomes insufficient, and the seal by the O-ring 13 becomes incomplete and dust is generated. Or the like, or the cover member 3 may come off.

本発明の目的は、カバー部材の変位量が少なくなり、例えばハウジングケースをセンサのケースとした場合、センサの精度が向上するケースの密閉構造を提供することにある。   An object of the present invention is to provide a case sealing structure in which the amount of displacement of a cover member is reduced. For example, when a housing case is used as a sensor case, the accuracy of the sensor is improved.

上述の目的を達成するために、本発明のケースの密閉構造は、円筒状でその肩部に設けられた環状溝を有するハウジングケースと、前記ハウジングケースに取り付けられ、板状部を有するカバー部材と、前記カバー部材の板状部の周縁部と前記ハウジングケースの端縁部との間で挟み込まれて取り付けられるシール部材と、前記ハウジングケース内で回転自在に支持された回転体と、前記回転体に設けられた摺動子と、前記ハウジングケース内に設けられ、前記摺動子が摺動する絶縁基板とを備え、前記カバー部材の内面の中央に設けた軸受け部で前記回転体の一端を支持するとともに、前記カバー部材の板状部の周縁部の内周面側には斜面が形成されるとともに、前記カバー部材の板状部から離れるほどにその斜面が外側に広がることによりテーパ部として構成され、該テーパ部と前記ハウジングケースの肩部の環状溝とで前記シール部材を挟み込んだ構成にしてある。 In order to achieve the above-described object, a case sealing structure according to the present invention includes a cylindrical housing case having an annular groove provided at a shoulder portion thereof, and a cover member attached to the housing case and having a plate-like portion. A seal member that is sandwiched and attached between a peripheral portion of the plate-like portion of the cover member and an end edge portion of the housing case, a rotating body that is rotatably supported in the housing case, and the rotation One end of the rotating body at a bearing portion provided in the center of the inner surface of the cover member, comprising a slider provided on the body and an insulating substrate provided in the housing case on which the slider slides. to support the, along with the slope is formed on the inner peripheral surface side of the peripheral edge of the plate-like portion of the cover member, the inclined surface on the increasing distance from the plate-like portion of the cover member is particularly extends outward Is configured as a tapered portion, it is a configuration sandwiched the sealing member in an annular groove of the shoulder portion of the housing case and the tapered portion.

また、上述の発明のケースの密閉構造において、前記カバー部材の周縁部が前記ハウジングケースの曲げ部を曲げることにより保持されている構成にしてある。
また、上述の発明のケースの密閉構造において、前記カバー部材の内面に補強用突起部を突設した構成にしてある。
また、上述の発明のケースの密閉構造において、前記シール部材はOリングである構成にしてある。
In the case sealing structure according to the above-described invention, the periphery of the cover member is held by bending the bent portion of the housing case.
In the sealed structure of the case of the above-described invention, a reinforcing projection is provided on the inner surface of the cover member.
In the sealed structure of the case of the above-described invention, the seal member is an O-ring.

本発明は、カバー部材の板状部から離れるほどにその斜面が外側に広がるテーパ部として構成され、該テーパ部とハウジングケースの肩部の環状溝とでシール部材を挟み込んだので、カバー部材の変位量が少なくなり、例えばハウジングケースをセンサのケースとした場合、センサの精度が向上する。 Since the present invention is configured as a taper portion whose inclined surface spreads outward as the distance from the plate-like portion of the cover member increases, the seal member is sandwiched between the taper portion and the annular groove in the shoulder portion of the housing case. For example, when the housing case is used as the sensor case, the accuracy of the sensor is improved.

以下、本発明のケースの密閉構造の一実施例を図面に基づいて説明する。   Hereinafter, an embodiment of a case sealing structure of the present invention will be described with reference to the drawings.

本発明を回転型センサに適用した図面を説明すると、図1は回転型センサの断面図、図2は図1の分解斜視図、図3は図1のカバー部材の斜視図、図4はカバー部材の装着前の状態を示す断面図、図5はカバー部材の装着後の状態を示す断面図である。   FIG. 1 is a cross-sectional view of a rotary sensor, FIG. 2 is an exploded perspective view of FIG. 1, FIG. 3 is a perspective view of a cover member of FIG. 1, and FIG. Sectional drawing which shows the state before mounting | wearing of a member, FIG. 5: is sectional drawing which shows the state after mounting | wearing of a cover member.

次に、本発明の実施例である回転型センサの構成を図1〜図5に基づいて説明すると、筺体1は、合成樹脂の成型品からなる円筒状のハウジングケース2と、このハウジングケース2の後方の開口部を塞ぐカバー部材3とで構成されている。   Next, the configuration of the rotary sensor according to the embodiment of the present invention will be described with reference to FIGS. 1 to 5. The housing 1 includes a cylindrical housing case 2 made of a synthetic resin molded product, and the housing case 2. And a cover member 3 that closes the rear opening.

そして、ハウジングケース2は、内部に収納部2aを有する筒状の側壁2bと、この側壁2bから収納部2a内に突出した2段状の筒部からなる受け部2cと、側壁2bの後方開口部(図で上方)側に設けられた肩部2dと、側壁2bから上方に延びて形成され、熱カシメで曲げられる曲げ部2fとを有する。また、肩部2dには、ゴム材質の弾性体からなるOリング13を嵌め込む環状溝2gが設けられ、この環状溝2gの内側の周壁面は凹んで形成されてOリング13を安定して保持されるようにしてある。   The housing case 2 includes a cylindrical side wall 2b having a storage portion 2a therein, a receiving portion 2c including a two-stage cylindrical portion protruding from the side wall 2b into the storage portion 2a, and a rear opening of the side wall 2b. A shoulder portion 2d provided on the portion (upward in the figure) side, and a bent portion 2f that is formed to extend upward from the side wall 2b and bend by thermal caulking. Further, the shoulder 2d is provided with an annular groove 2g into which an O-ring 13 made of an elastic material made of rubber is fitted, and the inner peripheral wall surface of the annular groove 2g is formed to be recessed so that the O-ring 13 is stabilized. It is supposed to be retained.

また、カバー部材3は、皿状をなし、板状部3aと、この板状部3aの外周部に設けられた鍔部3bと、板状部3aから前方に突出し、中央部に凹部3cが設けられた保持部3dとを有する。また、カバー部材3の鍔部3bには、外側(図1または図4において下方に行くほど)に広がるテーパ部3eが形成され、該テーパ部3eでシール部材であるOリング13を挟み込むようにしている。3fは、図3に示すようにカバー部材3の内面に突設された多数の補強用突起部である。 Further, the cover member 3 has a plate shape, a plate-like portion 3a, a flange portion 3b provided on the outer peripheral portion of the plate-like portion 3a, a front portion protruding from the plate-like portion 3a, and a concave portion 3c at the center portion. And a holding portion 3d provided. Further, a taper portion 3e that spreads outward (as it goes downward in FIG . 1 or 4 ) is formed in the flange portion 3b of the cover member 3, and the O-ring 13 that is a seal member is sandwiched between the taper portion 3e. ing. Reference numeral 3f denotes a number of reinforcing protrusions protruding from the inner surface of the cover member 3 as shown in FIG.

そして、このカバー部材3は、ハウジングケース2の後方の開口部側から肩部2dに載置され、図5に示すように肩部2dとテーパ部3eと間にOリング13を挟み込み、Oリング13を押し潰した状態で、図1及び図5に示すようにハウジングケース2の側壁2bの曲げ部2fを熱カシメする等して、開口部を塞ぐようにハウジングケース2に取り付けられる。   The cover member 3 is placed on the shoulder 2d from the rear opening side of the housing case 2, and an O-ring 13 is sandwiched between the shoulder 2d and the taper 3e as shown in FIG. In a state where 13 is crushed, the bent portion 2f of the side wall 2b of the housing case 2 is caulked, for example, as shown in FIGS. 1 and 5, and is attached to the housing case 2 so as to close the opening.

金属材からなる複数の端子4は、コネクタ用に使用され、この端子4は、ハウジングケース2に埋設されて取り付けられ、一端がハウジングケース2の収納部2a内に突出すると共に、他端が筒状部2e内に突出した状態となっている。金属材等からなる支持部5は、円柱状部5aと、この円柱状部5aの前方に設けられた円錐部5bとを有し、この支持部5は、円柱状部5aを凹部3cに挿入して、保持部3dによって保持されている。   A plurality of terminals 4 made of a metal material are used for a connector, and the terminals 4 are embedded and attached to the housing case 2, one end projects into the housing portion 2 a of the housing case 2, and the other end is a cylinder. It is in a state of protruding into the shape portion 2e. The support portion 5 made of a metal material or the like has a columnar portion 5a and a conical portion 5b provided in front of the columnar portion 5a. The support portion 5 inserts the columnar portion 5a into the recess 3c. And it is hold | maintained by the holding | maintenance part 3d.

板状の絶縁基板6は、中心部に孔6aを有し、この絶縁基板6の一面には、ここでは図示しないが、抵抗体パターンと良導電体からなる集電体パターンが設けられており、そして、この抵抗体パターンと集電体パターンは、絶縁基板6に取り付けられた複数の端子部7に導通した状態となっている。また、この絶縁基板6は、外周部が肩部2dに載置され、孔6aが支持部5と対向した状態で、収納部2a内に収納され、この絶縁基板6は、ハウジングケース2に取り付けられたカバー部材3によって、外周部が肩部2dに押し付けられて、ハウジングケース2に取り付けられると共に、端子部7は、収納部2a内に突出したコネクタ用の端子4と半田接続されている。   The plate-like insulating substrate 6 has a hole 6a in the center, and a current collector pattern made of a resistor pattern and a good conductor is provided on one surface of the insulating substrate 6, although not shown here. The resistor pattern and the current collector pattern are electrically connected to a plurality of terminal portions 7 attached to the insulating substrate 6. The insulating substrate 6 is housed in the housing portion 2 a with the outer peripheral portion placed on the shoulder portion 2 d and the hole 6 a facing the support portion 5. The insulating substrate 6 is attached to the housing case 2. The outer peripheral portion is pressed against the shoulder portion 2d by the cover member 3 so as to be attached to the housing case 2, and the terminal portion 7 is solder-connected to the connector terminal 4 protruding into the housing portion 2a.

合成樹脂の成型品からなる回転体8は、2段状の円板状部8aと、この円板状部8aの中央部から前方に突出した筒状の壁部8bと、この筒状の壁部8bの中央部に設けられた凹部8cと、凹部8cの内壁面に形成された凸部8eと、円板状部8aの中央部から後方に突出する突部8fと、この突部8fの後端部に設けられた円錐状の穴部8gと、摺動子10が取り付けられて円板状部8aに固定される摺動子受け8hとを有する。   A rotating body 8 made of a synthetic resin molded product includes a two-stage disk-shaped portion 8a, a cylindrical wall portion 8b protruding forward from the center of the disk-shaped portion 8a, and the cylindrical wall. A concave portion 8c provided at the center of the portion 8b, a convex portion 8e formed on the inner wall surface of the concave portion 8c, a protruding portion 8f protruding rearward from the central portion of the disk-shaped portion 8a, and the protruding portion 8f It has a conical hole 8g provided at the rear end portion, and a slider receiver 8h to which the slider 10 is attached and fixed to the disc-like portion 8a.

そして、この回転体8は、ハウジングケース2の収納部2a内に収納され、筒状の壁部8bが受け部2c内に挿通されると共に、突部8fが絶縁基板6の孔6aに挿通され、凹部8gに円錐状部5bが嵌入して、回転体8は、回転可能に保持されると共に、突部8fによってピボット支持されて、傾倒可能になっている。また、この回転体8は、円板状部8aと受け部2cとの間に撓めた状態で配置されたウェーブワッシャー9によって、支持部5側に常時押圧されている。   The rotating body 8 is housed in the housing portion 2a of the housing case 2, the cylindrical wall portion 8b is inserted into the receiving portion 2c, and the projection 8f is inserted into the hole 6a of the insulating substrate 6. The conical portion 5b is fitted into the recess 8g, and the rotating body 8 is rotatably held and pivotally supported by the protrusion 8f so as to be tilted. The rotating body 8 is always pressed to the support portion 5 side by a wave washer 9 disposed in a bent state between the disc-shaped portion 8a and the receiving portion 2c.

摺動子10は、導電性のあるバネ板で形成され、この摺動子10は、円板状部8aの下面に取り付けられ、抵抗体パターンと集電体パターンに摺動可能となっている。そして、抵抗体パターンと集電体パターン、及び摺動子10とによって、回転角度を検出する回転型可変抵抗器からなる検出手段Kが構成されている。なお、この検出手段Kは、回転型可変抵抗器以外の回転型エンコーダ等で構成しても良い。   The slider 10 is formed of a conductive spring plate. The slider 10 is attached to the lower surface of the disk-shaped portion 8a, and can slide on the resistor pattern and the current collector pattern. . The resistor pattern, the current collector pattern, and the slider 10 constitute a detection means K including a rotary variable resistor that detects a rotation angle. The detecting means K may be constituted by a rotary encoder other than the rotary variable resistor.

バネ性ある材料からなるバネ部材11は、U字状に形成され、アーム部11aを有する。   The spring member 11 made of a material having a spring property is formed in a U shape and has an arm portion 11a.

駆動軸(なお、図1及び図2には図示していないが、前記図6と同様の駆動軸12である)は、バネ部材11のアーム部11aに圧入され、回転体8の凹部8c内に収納される。そして前記駆動軸は、車両のスロットル弁と連動して回転するように車両本体に設けられている。   A drive shaft (not shown in FIGS. 1 and 2 but the same drive shaft 12 as in FIG. 6) is press-fitted into the arm portion 11 a of the spring member 11 and is inserted into the recess 8 c of the rotating body 8. It is stored in. The drive shaft is provided in the vehicle main body so as to rotate in conjunction with the throttle valve of the vehicle.

上記のように回転体8にバネ部材11が位置決めされていると共に、壁部8bは合成樹脂の成型品からなり、撓みにくく、硬いという性質を有しているので、回転体8に対してバネ部材11が相対的に移動する恐れがない。また、前記駆動軸はバネ部材11と強嵌合状態となっているので、前記駆動軸がバネ部材11に対して相対的に移動する恐れがないので、前記駆動軸が回転体8からずれる恐れがない。   As described above, the spring member 11 is positioned on the rotating body 8, and the wall portion 8 b is made of a synthetic resin molded product and is hard to bend and has a hard property. There is no fear that the member 11 moves relatively. Further, since the drive shaft is in a strong fitting state with the spring member 11, there is no fear that the drive shaft moves relative to the spring member 11, and thus the drive shaft may be displaced from the rotating body 8. There is no.

また、前記駆動軸は、バネ部材11を介して、凹部8cとスプライン結合をしているので、回転ズレがおこる危険性は著しく小さい。そして、前記駆動軸が回転されると、回転体8が回転され、摺動子10が絶縁基板6上に形成された図示せぬ抵抗体パターン上と集電体パターン上と摺動して、検出手段Kが操作されて、変化した出力電圧が出力されるようになっている。また、前記駆動軸にラジアル方向の荷重が加わった場合は、駆動軸12が回転体8と共に傾いて、ウェーブワッシャー9が収縮して加重を吸収し、ウェーブワッシャー9の復帰力によって、回転体8が元の位置に復帰するようになっている。また、仮に、前記駆動軸がセンターずれして組み込まれても、回転体8は円錐部5bを支点として傾き、受け部2cに過大な力が加わらないようにしているため、前記駆動軸は削れにくくなっている。また、回転体8は円錐部5bを中心として回転するので安定して回転させることができ、摺動子10と抵抗体との位置を変わりにくくすることができる。   Further, since the drive shaft is splined to the recess 8c via the spring member 11, the risk of rotational deviation is extremely small. Then, when the drive shaft is rotated, the rotating body 8 is rotated, and the slider 10 slides on the resistor pattern (not shown) formed on the insulating substrate 6 and the current collector pattern, The detection means K is operated to output the changed output voltage. When a radial load is applied to the drive shaft, the drive shaft 12 tilts together with the rotating body 8, the wave washer 9 contracts and absorbs the load, and the returning force of the wave washer 9 causes the rotating body 8 to move. Will return to its original position. Further, even if the drive shaft is incorporated with a deviation from the center, the rotating body 8 is inclined with the conical portion 5b as a fulcrum and prevents excessive force from being applied to the receiving portion 2c. It has become difficult. Moreover, since the rotary body 8 rotates centering on the cone part 5b, it can be rotated stably and the position of the slider 10 and a resistor can be made difficult to change.

前記実施例における回転型センサは上記のような構成を有し、次にその動作について説明すると、前記駆動軸は、自動車のスロットルバルブに連携され、スロットルバルブが回転することで、前記駆動軸が回転する。そして、前記駆動軸が回転すると、回転体8が回転し、出力電圧が変化して、この変化をマイコン等で検知することによって回転角度を検知することができる。   The rotary sensor in the embodiment has the above-described configuration. Next, the operation thereof will be described. The drive shaft is linked to a throttle valve of an automobile, and the drive shaft is rotated by rotating the throttle valve. Rotate. When the drive shaft rotates, the rotating body 8 rotates and the output voltage changes, and the rotation angle can be detected by detecting this change with a microcomputer or the like.

次に、カバー部材3のテーパ部3eの作用について説明する。   Next, the operation of the tapered portion 3e of the cover member 3 will be described.

図1及び図5に示すように、Oリング13をハウジングケース2の肩部2dの環状溝2gとカバー部材3のテーパ部3eとで挟み込んで押し潰して密閉するようにしている。   As shown in FIGS. 1 and 5, the O-ring 13 is sandwiched between the annular groove 2 g of the shoulder 2 d of the housing case 2 and the tapered portion 3 e of the cover member 3 to be crushed and sealed.

このような状態では、押し潰されたOリング13は、弾性体であるため元に戻ろうとする力F1がテーパ部3eに図5に示すように外方斜め上方(テーパ部3eに垂直方向)に作用している。一方、カバー部材3の周縁部の上端部は曲げ部2dによって上方のP点で押えられているため、カバー部材3の周縁部は、P点を中心にして力F1が作用してカバー部材3の板状部3aには下方への反力Q1が発生し、これにより、カバー部材3の板状部3aの中央付近を下方(矢印B方向)に凹まそうとする。また、同時に、カバー部材3の内面の保持部3dにウエーブワッシャー9の力が回転体8の及び支持部5を介して矢印A方向に掛かっているため、一層、矢印B方向にカバー部材3の板状部3aの中央を膨出させようとし、かつ上記したような熱膨張によるカバー部材3の板状部3aの変位がある。したがって、後段のカバー部材3の板状部3aの膨出させようとする力を、前段のカバー部材3の板状部3aへの下方の反力Q1により打ち消しあるいは減少させ、カバー部材3の板状部3aの矢印B方向の変位量を減少させることができる。   In such a state, since the crushed O-ring 13 is an elastic body, the force F1 for returning to the original state is obliquely upward outward (perpendicular to the tapered portion 3e) on the tapered portion 3e as shown in FIG. It is acting on. On the other hand, since the upper end of the peripheral edge of the cover member 3 is pressed at the upper P point by the bent portion 2d, the force F1 acts on the peripheral edge of the cover member 3 around the P point, and the cover member 3 A downward reaction force Q1 is generated in the plate-like portion 3a, thereby trying to dent the vicinity of the center of the plate-like portion 3a of the cover member 3 downward (in the direction of arrow B). At the same time, the force of the wave washer 9 is applied to the holding portion 3d on the inner surface of the cover member 3 in the direction of the arrow A via the rotating body 8 and the support portion 5, so that the cover member 3 is further moved in the direction of the arrow B. There is a displacement of the plate-like portion 3a of the cover member 3 due to thermal expansion as described above in an attempt to bulge the center of the plate-like portion 3a. Therefore, the force to bulge the plate-like portion 3a of the rear cover member 3 is canceled or reduced by the downward reaction force Q1 to the plate-like portion 3a of the front cover member 3, so that the plate of the cover member 3 The amount of displacement in the direction of arrow B of the shape portion 3a can be reduced.

なお、上述したようにカバー部材3のテーパ部3eに力F1が作用した場合、カバー部材3のテーパ部3eはP点を中心にして外方に僅かに撓むことになるが、これを各部材の弾性変形にて行っても良く、あるいはカバー部材3の周縁部の外面と曲げ部2dとの間に僅かな隙間を設けても良い。   As described above, when the force F1 acts on the taper portion 3e of the cover member 3, the taper portion 3e of the cover member 3 slightly bends outward around the point P. You may carry out by elastic deformation of a member, or you may provide a slight clearance between the outer surface of the peripheral part of the cover member 3, and the bending part 2d.

このようにしてカバー部材3の板状部3aの中央付近の変位量を減少させ、あるいはほとんど生じさせないものとすることにより、回転体8に設けられた摺動子10と、絶縁基板6の回路パターンとの位置関係が変動することがなく、センサは正常な出力が得られる。   In this way, the displacement amount in the vicinity of the center of the plate-like portion 3a of the cover member 3 is reduced or hardly generated, so that the slider 10 provided on the rotating body 8 and the circuit of the insulating substrate 6 are provided. The positional relationship with the pattern does not change, and the sensor can obtain a normal output.

また、カバー部材3の膨出が防げるので、カバー部材3のテーパ部3eによるOリング13の圧縮状態に変化はなく、Oリング13によるシールも安定し、塵等の侵入を防げ、また、カバー部材3の外れも防止できる。   Further, since the cover member 3 can be prevented from bulging, there is no change in the compressed state of the O-ring 13 by the taper portion 3e of the cover member 3, the seal by the O-ring 13 is stable, dust and the like can be prevented from entering, and the cover The detachment of the member 3 can also be prevented.

なお、前記実施例ではカバー部材3に円錐部5bを有する支持部5を取り付けて回転体8の穴部8gを支持するようにしたが、本発明はこれに限らず、凸凹の関係が逆であっても良い。   In the above-described embodiment, the support portion 5 having the conical portion 5b is attached to the cover member 3 to support the hole portion 8g of the rotating body 8. However, the present invention is not limited to this, and the uneven relationship is reversed. There may be.

このように構成された前記実施例にあっては、円筒状のハウジングケース2と、ハウジングケース2に取り付けられるカバー部材3と、カバー部材3の周縁部とハウジングケース2の端縁部との間で挟み込まれて取り付けられるOリング13と、ハウジングケース2内で回転自在に支持された回転体8と、回転体8に設けられた摺動子10と、ハウジングケース2内に設けられ、摺動子10が摺動する絶縁基板6とを備え、カバー部材3の内面の中央に設けた軸受け部で回転体8の一端を支持するとともに、カバー部材3の周縁部には外側に広がるテーパ部3eが形成され、該テーパ部3eでOリング13を挟み込んだため、また、カバー部材3の周縁部がハウジングケース2の曲げ部2dを曲げることにより保持されているため、カバー部材3の変位量が少なくなり、例えばハウジングケース2をセンサのケースとした場合、センサの精度が向上する。   In the embodiment thus configured, the cylindrical housing case 2, the cover member 3 attached to the housing case 2, and the gap between the peripheral edge of the cover member 3 and the edge of the housing case 2. An O-ring 13 sandwiched between and attached to the housing, a rotating body 8 rotatably supported in the housing case 2, a slider 10 provided in the rotating body 8, and a sliding member provided in the housing case 2. And an insulating substrate 6 on which the child 10 slides, and supports one end of the rotating body 8 with a bearing provided at the center of the inner surface of the cover member 3, and a taper portion 3 e spreading outward at the peripheral edge of the cover member 3. Since the O-ring 13 is sandwiched between the tapered portions 3e and the peripheral portion of the cover member 3 is held by bending the bent portion 2d of the housing case 2, the cover portion Displacement of 3 is reduced, for example when the housing case 2 and sensor case, the accuracy of the sensor is improved.

本発明の実施例に係るケースの密閉構造を示す断面図である。It is sectional drawing which shows the sealing structure of the case which concerns on the Example of this invention. 図1の分解斜視図である。FIG. 2 is an exploded perspective view of FIG. 1. 図1のカバー部材の斜視図である。It is a perspective view of the cover member of FIG. カバー部材の装着前の状態を示す断面図である。It is sectional drawing which shows the state before mounting | wearing of a cover member. カバー部材の装着後の状態を示す断面図である。It is sectional drawing which shows the state after mounting | wearing of a cover member. 従来のケースの密閉構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the sealing structure of the conventional case. カバー部材の装着前の状態を示す断面図である。It is sectional drawing which shows the state before mounting | wearing of a cover member. カバー部材の装着後の状態を示す断面図である。It is sectional drawing which shows the state after mounting | wearing of a cover member.

符号の説明Explanation of symbols

2 ハウジングケース
2d 曲げ部
2g 環状溝
3 カバー部材
3e テーパ部
6 絶縁基板
8 回転体
10 摺動子
13 Oリング
2 Housing case 2d Bending part 2g Annular groove 3 Cover member 3e Tapered part 6 Insulating substrate 8 Rotating body 10 Slider 13 O-ring

Claims (4)

円筒状でその肩部に設けられた環状溝を有するハウジングケースと、
前記ハウジングケースに取り付けられ、板状部を有するカバー部材と、
前記カバー部材の板状部の周縁部と前記ハウジングケースの端縁部との間で挟み込まれて取り付けられるシール部材と、
前記ハウジングケース内で回転自在に支持された回転体と、
前記回転体に設けられた摺動子と、
前記ハウジングケース内に設けられ、前記摺動子が摺動する絶縁基板とを備え、
前記カバー部材の内面の中央に設けた軸受け部で前記回転体の一端を支持するとともに、
前記カバー部材の板状部の周縁部の内周面側には斜面が形成されるとともに、前記カバー部材の板状部から離れるほどにその斜面が外側に広がることによりテーパ部として構成され、該テーパ部と前記ハウジングケースの肩部の環状溝とで前記シール部材を挟み込んだことを特徴とするケースの密閉構造。
A housing case that is cylindrical and has an annular groove provided on its shoulder;
A cover member attached to the housing case and having a plate-like portion;
A seal member that is sandwiched and attached between the peripheral edge of the plate-like portion of the cover member and the edge of the housing case;
A rotating body rotatably supported in the housing case;
A slider provided on the rotating body;
An insulating substrate provided in the housing case, on which the slider slides,
While supporting one end of the rotating body with a bearing provided in the center of the inner surface of the cover member,
Wherein with the slope is formed on the inner peripheral surface side of the peripheral edge of the plate-like portion of the cover member, the inclined surface on the increasing distance from the plate-like portion of the cover member is configured as a tapered portion by extending toward the outside, A sealing structure for a case, wherein the sealing member is sandwiched between the tapered portion and an annular groove in a shoulder portion of the housing case.
請求項1において、前記カバー部材の周縁部が前記ハウジングケースの曲げ部を曲げることにより保持されていることを特徴とするケースの密閉構造。   The case sealing structure according to claim 1, wherein a peripheral portion of the cover member is held by bending a bent portion of the housing case. 請求項1または2において、前記カバー部材の内面に補強用突起部を突設したことを特徴とするケースの密閉構造。   The case sealing structure according to claim 1, wherein a reinforcing projection is provided on the inner surface of the cover member. 請求項1〜3のいずれか1項において、前記シール部材はOリングであることを特徴とするケースの密閉構造。   4. The case sealing structure according to claim 1, wherein the seal member is an O-ring.
JP2004340787A 2004-11-25 2004-11-25 Case sealing structure Expired - Fee Related JP4512478B2 (en)

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