JP2014073753A - Collision detection device for vehicle - Google Patents

Collision detection device for vehicle Download PDF

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JP2014073753A
JP2014073753A JP2012222136A JP2012222136A JP2014073753A JP 2014073753 A JP2014073753 A JP 2014073753A JP 2012222136 A JP2012222136 A JP 2012222136A JP 2012222136 A JP2012222136 A JP 2012222136A JP 2014073753 A JP2014073753 A JP 2014073753A
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chamber
vehicle
collision detection
detection device
bumper
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JP5772780B2 (en
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Takatoshi Tanabe
貴敏 田辺
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Denso Corp
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Denso Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0136—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/48—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
    • B60R2019/1873—Cellular materials

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a collision detection device for a vehicle which prevents intrusion of mud water and insects to secure a function of a breathing hole in a chamber member for pressure detection and thereby achieves high reliability.SOLUTION: A collision detection device for a vehicle includes: a chamber member 5 disposed on a front surface of a bumper reinforce 10 in a vehicle bumper 2 and having a chamber body 11 which forms a chamber space 4 therein; and a pressure sensor which detects a pressure in the chamber space 4. The collision detection device for the vehicle is formed so as to detect a collision to the vehicle bumper 2 on the basis of a pressure detection result of the pressure sensor. The chamber member 5 has a breathing hole 23 which allows the chamber space 4 to communicate with the exterior. A filter member 31 is attached to the breathing hole 23.

Description

本発明は、バンパへの物体の衝突を検知する車両用衝突検知装置に関する。   The present invention relates to a vehicle collision detection device that detects a collision of an object with a bumper.

車両が歩行者と衝突した際、歩行者へのダメージを軽減する歩行者保護装置が実用化されている。この歩行者保護装置は、歩行者がエンジンフードにたたきつけられる衝撃を和らげるために、エンジンフードの後端を衝突検知後瞬時に上昇させ、上昇した分のストロークを緩衝用機構で支えるというもので、ポップアップフード、ポップアップエンジンフード、アクティブボンネット、アクティブフード等の名称で呼ばれている。また別の形態として、車体外部のエンジンフード上からフロントウインド下部にかけてエアバッグを展開し、歩行者の衝撃を緩衝するというものもあり、カウルエアバッグ、フードエアバッグ等の名称で呼ばれている。   Pedestrian protection devices that reduce damage to pedestrians when a vehicle collides with pedestrians have been put into practical use. This pedestrian protection device instantly raises the rear end of the engine hood after collision detection in order to reduce the impact of the pedestrian hitting the engine hood, and supports the increased stroke with a buffer mechanism. It is called by names such as pop-up hood, pop-up engine hood, active bonnet, and active hood. As another form, an airbag is deployed from the engine hood outside the vehicle body to the lower part of the front window to cushion the impact of pedestrians, and is called by the names of cowl airbags, hood airbags, etc. .

これらの装置では、バンパ部に衝突検知装置を設け、物体が接触したことを検知して装置を作動させる仕組みを持っている。このような衝突検知装置として、バンパ内にチャンバ部材を配設して、バンパに物体が衝突した際のチャンバ内の圧力変化を検出するよう構成された車両用衝突検知装置が提案されている（例えば特許文献１）。   In these devices, a bumper unit is provided with a collision detection device, which detects the contact of an object and operates the device. As such a collision detection device, a vehicle collision detection device is proposed in which a chamber member is disposed in a bumper and configured to detect a pressure change in the chamber when an object collides with the bumper ( For example, Patent Document 1).

例えば、特許文献１記載の車両用衝突検知装置では、チャンバ部材の下面側に呼吸孔を設けてチャンバ内を外部に連通させてチャンバ内の圧力を常に大気圧に保ち、標高の変化による大気圧変動の影響を受けることなくバンパへの衝突に伴うチャンバ部材内の圧力変化を正確に検出できるように構成されている。また、呼吸孔をチャンバ部材の下面側に設けたことにより、車両が冠水した道路を走行した後、チャンバ部材内部に溜まった水が、外部へ排出されるための水抜き孔としても機能するものとしている。   For example, in the vehicle collision detection device described in Patent Document 1, a breathing hole is provided on the lower surface side of the chamber member so that the inside of the chamber communicates with the outside so that the pressure in the chamber is always kept at atmospheric pressure. The pressure change in the chamber member due to the collision with the bumper can be accurately detected without being affected by the fluctuation. In addition, by providing a breathing hole on the lower surface side of the chamber member, it also functions as a drain hole for draining water accumulated inside the chamber member after running on a road flooded by the vehicle It is said.

特開２０１２−９６７５８号公報JP 2012-96758 A

しかしながら、チャンバ部材の下面側に直径が４［ｍｍ］程度の呼吸孔を設けた場合、車両が、悪路や泥水で冠水した道路を走行すると、泥水が排出される際、泥や砂が孔を塞ぐ場合があることがわかった。また呼吸孔から昆虫やクモが侵入し、呼吸孔の部分に巣を作る場合があることがわかった。そして、これらに起因してチャンバ内と大気との連通が妨げられた場合には、標高差や温度の影響を受けて衝突検知装置の検出精度が低下し、歩行者保護装置を作動すべき場合に不作動となったり、作動すべきでない場合に誤動作したりする可能性がある。   However, when a breathing hole having a diameter of about 4 [mm] is provided on the lower surface side of the chamber member, when the vehicle travels on a rough road or a road flooded with muddy water, mud and sand are removed when muddy water is discharged. It turns out that there is a case to block. It was also found that insects and spiders may invade from the respiratory holes and form a nest in the respiratory hole. And when communication between the atmosphere in the chamber and the atmosphere is hindered due to these, the detection accuracy of the collision detection device decreases due to the influence of altitude difference and temperature, and the pedestrian protection device should be activated May malfunction, or may malfunction if it should not be activated.

本発明は、上述した問題点に鑑みてなされたものであり、圧力検出用のチャンバ部材において、泥水や虫類の侵入を防止し、呼吸孔の機能を確保し、信頼性の高い車両用衝突検知装置を提供することを目的とする。   The present invention has been made in view of the above-described problems, and in a pressure detection chamber member, intrusion of muddy water and insects is prevented, the function of a breathing hole is secured, and a highly reliable vehicle collision is achieved. An object is to provide a detection device.

上記目的を達成するためになされた請求項１に記載の発明は、車両バンパ内でバンパリーンフォースの前面に配設されチャンバ空間を内部に形成してなるチャンバ本体を有するチャンバ部材と、前記チャンバ空間内の圧力を検出する圧力センサとを備え、前記圧力センサによる圧力検出結果に基づいて前記車両バンパへの衝突を検知するように構成された車両用衝突検知装置において、前記チャンバ部材は、前記チャンバ空間を外部に連通させる呼吸孔を有し、前記呼吸孔には、フィルタ部材が取りつけられていることを特徴とする。   In order to achieve the above-mentioned object, the invention according to claim 1 comprises a chamber member having a chamber body disposed in front of a bumper force in a vehicle bumper and having a chamber space formed therein, and the chamber A vehicular collision detection device configured to detect a collision with the vehicle bumper based on a pressure detection result by the pressure sensor. A breathing hole for communicating the chamber space with the outside is provided, and a filter member is attached to the breathing hole.

この構成によれば、呼吸孔にはフィルタ部材が取りつけられているため、通気性を確保しつつチャンバ部材内部への異物の侵入を防止することができる。例えば、車両が悪路や泥水で冠水した道路を走行しても泥水の侵入を防止することができるので、呼吸孔が砂や泥で塞がれることがない。また呼吸孔から昆虫やクモが侵入することもなく、営巣により呼吸孔が塞がれることもない。よって、呼吸孔の呼吸機能が確保され、信頼性の高い衝突検知を行うことができる。   According to this configuration, since the filter member is attached to the breathing hole, it is possible to prevent foreign matter from entering the chamber member while ensuring air permeability. For example, since the intrusion of muddy water can be prevented even when the vehicle travels on a bad road or a road flooded with muddy water, the breathing hole is not blocked by sand or mud. Also, insects and spiders do not enter from the breathing holes, and the breathing holes are not blocked by the nesting. Therefore, the respiratory function of the breathing hole is ensured, and highly reliable collision detection can be performed.

本発明の実施形態における車両用衝突検知装置の構成を平面視にて示す模式図である。It is a schematic diagram which shows the structure of the collision detection apparatus for vehicles in embodiment of this invention by planar view. 車両バンパにおける構成を側面視にて示す模式図である。It is a schematic diagram which shows the structure in a vehicle bumper by a side view. 車両用衝突検知装置の主要部の構成を示すＩＩＩ−ＩＩＩ断面図である。It is III-III sectional drawing which shows the structure of the principal part of the collision detection apparatus for vehicles. 車両用衝突検知装置の主要部の構成を示すＩＶ−ＩＶ断面図である。It is IV-IV sectional drawing which shows the structure of the principal part of the collision detection apparatus for vehicles. 図４におけるインサートブラケット及びフィルタ部材を拡大して示す拡大断面図である。It is an expanded sectional view which expands and shows the insert bracket and filter member in FIG. 図５におけるフィルタ部材のＡ視図である。It is A view of the filter member in FIG. インサートブラケット及びフィルタ部材の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of an insert bracket and a filter member. チャンバ部材のブロー成形においてインサートブラケットをインサート成形する様子を金型とともに断面で示す模式図である。It is a schematic diagram which shows a mode that insert molding of an insert bracket is carried out with a metal mold | die in blow molding of a chamber member. 第１変形例に係る車両用衝突検知装置の主要部の構成を示すＩＶ−ＩＶ断面図である。It is IV-IV sectional drawing which shows the structure of the principal part of the collision detection apparatus for vehicles which concerns on a 1st modification. 第２変形例に係る車両用衝突検知装置の主要部の構成を示すＩＶ−ＩＶ断面図である。It is IV-IV sectional drawing which shows the structure of the principal part of the collision detection apparatus for vehicles which concerns on a 2nd modification. 第３変形例に係るチャンバ部材におけるインサートブラケット及びフィルタ部材の取り付け状態を平面視にて示す模式図である。It is a schematic diagram which shows the attachment state of the insert bracket and filter member in the chamber member which concerns on a 3rd modification by planar view.

以下、本発明の車両用衝突検知装置の具体的な実施形態について図面を参照しつつ説明する。本実施形態に係る車両用衝突検知装置１は、図１、２に示すように、車両前方のバンパ２への物体の衝突を検知し、歩行者保護装置３を起動するよう構成された装置である。   Hereinafter, specific embodiments of the vehicle collision detection device of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the vehicle collision detection device 1 according to the present embodiment is a device configured to detect a collision of an object with a bumper 2 in front of the vehicle and start a pedestrian protection device 3. is there.

車両用衝突検知装置１は、図１等に示すように、バンパ２と、バンパ２内に配設され、チャンバ空間４が内部に形成されるチャンバ部材５と、チャンバ空間４内の圧力変化を検出する圧力センサ６と、歩行者保護装置電子制御ユニット（以下、電子制御ユニットをＥＣＵと略記する）７とを備えている。   As shown in FIG. 1 and the like, the vehicle collision detection apparatus 1 includes a bumper 2, a chamber member 5 disposed in the bumper 2 and having a chamber space 4 formed therein, and a pressure change in the chamber space 4. A pressure sensor 6 to be detected and a pedestrian protection device electronic control unit (hereinafter, the electronic control unit is abbreviated as ECU) 7 are provided.

バンパ２は、図２を拡大した断面図である図３、４に示すように、バンパカバー８、チャンバ部材５、バンパアブソーバ９、バンパリーンフォース１０を主体として構成されている。   As shown in FIGS. 3 and 4, which are enlarged sectional views of FIG. 2, the bumper 2 mainly includes a bumper cover 8, a chamber member 5, a bumper absorber 9, and a bumper force 10.

バンパカバー８は、バンパ２の構成部品を覆うように設けられるポリプロピレン等の樹脂製のカバー部材であり、バンパ２の外観を構成する。   The bumper cover 8 is a cover member made of a resin such as polypropylene provided so as to cover the components of the bumper 2, and configures the appearance of the bumper 2.

チャンバ部材５は、バンパ２内でバンパリーンフォース１０の前面上方に配置され、車幅方向に延びる低密度ポリエチレン（ＬＤＰＥ）製の中空の部材である。チャンバ部材５の中空部はチャンバ空間４となっている。   The chamber member 5 is a hollow member made of low density polyethylene (LDPE) that is disposed in the bumper 2 above the front surface of the bumper force 10 and extends in the vehicle width direction. The hollow portion of the chamber member 5 is a chamber space 4.

さらに具体的には、チャンバ部材５は、図３、４に示すように、車幅方向に延びて内部にチャンバ空間４が形成される本体部１１と、本体部１１から延設されて内部がチャンバ空間４に連通する２つの延設部１２及び１つの延設部１３とからなっている。延設部１２、１３は、それぞれ本体部１１とブロー成形により一体的に形成されている。   More specifically, as shown in FIGS. 3 and 4, the chamber member 5 includes a main body portion 11 that extends in the vehicle width direction and has a chamber space 4 formed therein, and extends from the main body portion 11. It consists of two extending portions 12 and one extending portion 13 communicating with the chamber space 4. The extending portions 12 and 13 are each integrally formed with the main body portion 11 by blow molding.

延設部１２は、圧力センサ６を取り付けるために形成された部分であって、図１、図３に示すように、チャンバ部材５の車幅方向中心を挟んで左側及び右側の２箇所において、本体部１１上面からバンパリーンフォース１０上方に向かって延設されている。２つの延設部１２は、それぞれ上面に開口１２ａが形成されており、圧力センサ６は圧力導入管６ａを開口１２ａに差し込んだ状態で取り付けられる。尚、圧力センサ６が２つ設けられているのは、衝突検知における冗長性を確保するためである。   The extending portion 12 is a portion formed for attaching the pressure sensor 6, and as shown in FIGS. 1 and 3, at two places on the left side and the right side across the center in the vehicle width direction of the chamber member 5, The upper surface of the main body 11 extends upward from the bumper force 10. Each of the two extending portions 12 has an opening 12a formed on the upper surface thereof, and the pressure sensor 6 is attached in a state where the pressure introducing pipe 6a is inserted into the opening 12a. The two pressure sensors 6 are provided to ensure redundancy in collision detection.

延設部１３は、インサートブラケット２１及びフィルタ部材３１を取り付けるために形成された部分であって、図１、図４に示すように、本体部１１の車幅方向中央の本体部１１上面から延設されている。延設部１３の車両後方側の背面には、呼吸孔２３を有するインサートブラケット２１がインサート成形により取り付けられている。   The extending portion 13 is a portion formed for attaching the insert bracket 21 and the filter member 31, and extends from the upper surface of the main body portion 11 at the center in the vehicle width direction of the main body portion 11 as shown in FIGS. 1 and 4. It is installed. An insert bracket 21 having a breathing hole 23 is attached to the rear surface of the extended portion 13 on the vehicle rear side by insert molding.

インサートブラケット２１は、呼吸孔２３を有するポリブチレンテレフタレート（ＰＢＴ）製部材であり、フィルタ部材３１が取り付けられる。チャンバ空間４は、インサートブラケット２１の呼吸孔２３により、密閉されることなく外気と連通しているため、常時、大気圧になっている。これによりチャンバ空間４において標高差や温度の変化などによる外気との気圧差が生じることが防止され、車両用衝突検知装置１が標高や気温の変化の影響を受けることなく衝突検知できるようになっている。尚、呼吸孔２３は直径数ミリメートル程度の小孔であり、衝突に伴うチャンバ空間４の急激な圧力変化を検出する場合においてチャンバ空間４は略密閉状態とみなすことができる。   The insert bracket 21 is a polybutylene terephthalate (PBT) member having a breathing hole 23, and a filter member 31 is attached to the insert bracket 21. The chamber space 4 is always at atmospheric pressure because it communicates with the outside air without being sealed by the breathing hole 23 of the insert bracket 21. As a result, it is possible to prevent a difference in atmospheric pressure from occurring due to a difference in altitude or a change in temperature in the chamber space 4, and the vehicle collision detection device 1 can detect a collision without being affected by a change in altitude or temperature. ing. Note that the breathing hole 23 is a small hole having a diameter of several millimeters, and the chamber space 4 can be regarded as a substantially sealed state when a sudden pressure change in the chamber space 4 due to a collision is detected.

インサートブラケット２１は、より詳細には、図５〜図７に示すように、筒部２２と、フランジ部２４と、傘部２５とから構成されている。   In more detail, the insert bracket 21 is comprised from the cylinder part 22, the flange part 24, and the umbrella part 25, as shown in FIGS.

筒部２２は、中央に呼吸孔２３を有する円筒状に形成され、フィルタ部材３１が車両後方側から挿入・嵌合される。   The cylindrical portion 22 is formed in a cylindrical shape having a breathing hole 23 in the center, and the filter member 31 is inserted and fitted from the vehicle rear side.

フランジ部２４は、筒部２２の車両前方側で鍔状に形成され、図８に示すようにチャンバ部材５のブロー成形時にインサート成形される部分である。ブロー成形では、パーティングラインから離れるほど肉厚が薄く成形されるため、チャンバ部材５の車両後方側の背面付近に、車両前方側の金型１０１と車両後方側の金型１０２との合わせ面であるパーティングライン（ＰＬ）を設けることにより、インサートブラケット２１のフランジ部２４がインサートされる部分の肉厚を厚くすることができる。これにより、衝突時のチャンバ部材５の変形が阻害されることなく、インサートブラケット２１は強固に固定される。   The flange portion 24 is formed in a bowl shape on the vehicle front side of the cylindrical portion 22 and is a portion that is insert-molded when the chamber member 5 is blow-molded as shown in FIG. In blow molding, since the thickness is reduced as the distance from the parting line increases, the mating surface of the mold 101 on the vehicle front side and the mold 102 on the vehicle rear side is located near the rear surface of the chamber member 5 on the vehicle rear side. By providing the parting line (PL), the thickness of the portion where the flange portion 24 of the insert bracket 21 is inserted can be increased. Thereby, the insert bracket 21 is firmly fixed without inhibiting the deformation of the chamber member 5 at the time of the collision.

傘部２５は、筒部２２の外周側に設けられる下面が開口する断面円弧状部分であって、フランジ部２４の背面部から延びて筒部２２の上方側を庇のように覆っている。   The umbrella part 25 is a circular arc-shaped part having an open lower surface provided on the outer peripheral side of the cylindrical part 22, and extends from the rear part of the flange part 24 to cover the upper side of the cylindrical part 22 like a bag.

フィルタ部材３１は、呼吸孔２３が設けられるインサートブラケット２１の筒部２２に取り付けられて、通気性を確保しつつチャンバ部材５内部へ水や異物が侵入するのを防止する。   The filter member 31 is attached to the cylindrical portion 22 of the insert bracket 21 in which the breathing hole 23 is provided, and prevents water and foreign matter from entering the chamber member 5 while ensuring air permeability.

フィルタ部材３１は、より詳細には、図５、６、７に示すように、支持体３２と、通気膜３３と、カバー３４とから構成されている。   More specifically, as shown in FIGS. 5, 6, and 7, the filter member 31 includes a support body 32, a gas permeable membrane 33, and a cover 34.

支持体３２は、熱可塑性エラストマー製の円筒状部材であり、弾性を利用してインサートブラケット２１の筒部２２に被せられる。   The support body 32 is a cylindrical member made of a thermoplastic elastomer, and covers the cylindrical portion 22 of the insert bracket 21 using elasticity.

通気膜３３は、通気を確保しつつ水の侵入を防止可能なポリテトラフルオロエチレン（ＰＴＦＥ）多孔質膜であり、円形シート状に形成されている。ＰＴＦＥ多孔質膜は、ＰＴＦＥシートを二軸延伸して多孔質構造とし、延伸倍率により、通気量は５０〜１５００［ｃｍ３／ｍｉｎ］、耐水度は１〜１００［ｋＰａ］程度のものを得ることができる。両者は相反する特性であるため、実験により適切な特性のものを選択するものとする。通気膜３３は、接着剤により支持体３２の一端側の開口縁に接着される。 The gas permeable membrane 33 is a polytetrafluoroethylene (PTFE) porous membrane capable of preventing air from entering while ensuring ventilation, and is formed in a circular sheet shape. The porous PTFE membrane is obtained by biaxially stretching a PTFE sheet to obtain a porous structure, and depending on the stretching ratio, an air flow rate of 50 to 1500 [cm 3 / min] and a water resistance of about 1 to 100 [kPa] are obtained. be able to. Since the two are contradictory characteristics, an appropriate characteristic is selected by experiment. The gas permeable membrane 33 is bonded to the opening edge on one end side of the support 32 by an adhesive.

カバー３４は、ポリプロピレン製のキャップ状部材であり、支持体３２の通気膜３３が設けられる一端側に被せられて通気膜３３を覆うと共に支持体３２との間に開口を形成している。つまり、カバー３４と支持体３２、通気膜３３とは、一部を除いて密着しておらず、図５に矢印で示すように空気の出入りが可能であり、支持体３２とカバー３４とが開口と通気膜３３との間にラビリンス構造の通気経路を形成している。   The cover 34 is a cap-shaped member made of polypropylene. The cover 34 is placed on one end of the support 32 where the gas permeable membrane 33 is provided to cover the gas permeable membrane 33 and form an opening between the support 32. That is, the cover 34, the support body 32, and the gas permeable membrane 33 are not in close contact except for a part, and air can enter and exit as indicated by arrows in FIG. A ventilation path having a labyrinth structure is formed between the opening and the ventilation film 33.

バンパアブソーバ９は、バンパリーンフォース１０の前面下方且つチャンバ部材５の下部に配置されており、バンパ２において衝撃吸収の作用を受け持つ部材である。バンパアブソーバ９としては、例えば発泡させたポリプロピレン等を好適に用いることができる。   The bumper absorber 9 is disposed below the front surface of the bumper force 10 and below the chamber member 5, and is a member responsible for shock absorption in the bumper 2. As the bumper absorber 9, for example, foamed polypropylene or the like can be suitably used.

バンパリーンフォース１０は、バンパ２内に配設されて車両幅方向に延びるアルミ等の金属製の梁状部材であって、車両前後方向に延びる一対の金属製部材であるサイドメンバ１５の前端に取り付けられている。   The bumper force 10 is a metal beam-like member such as aluminum that is disposed in the bumper 2 and extends in the vehicle width direction, and is formed at the front end of the side member 15 that is a pair of metal members that extend in the vehicle front-rear direction. It is attached.

圧力センサ６は、気体圧力の変化を検出可能なセンサ装置であり、圧力に比例した信号を出力し、歩行者保護装置ＥＣＵ７と信号線７ａを介して電気的に接続されている。上述したように、圧力センサ６は、延設部１２においてチャンバ部材５に取り付けられ、チャンバ空間４内の空気の圧力変化を検出可能に構成されている。   The pressure sensor 6 is a sensor device that can detect a change in gas pressure, outputs a signal proportional to the pressure, and is electrically connected to the pedestrian protection device ECU 7 via a signal line 7a. As described above, the pressure sensor 6 is attached to the chamber member 5 in the extending portion 12 and is configured to be able to detect a change in pressure of air in the chamber space 4.

車速センサ１６は、車両の走行速度を検出する既設の速度センサであり、歩行者保護装置ＥＣＵ７と信号線７ａを介して電気的に接続されている。   The vehicle speed sensor 16 is an existing speed sensor that detects the traveling speed of the vehicle, and is electrically connected to the pedestrian protection device ECU 7 via the signal line 7a.

歩行者保護装置ＥＣＵ７は、圧力センサ６と接続され、車両本体に配置されている歩行者保護装置３の起動制御を行うための電子制御装置であり、圧力センサ６から出力される信号が信号線７ａを介して入力されるように構成されている。歩行者保護装置ＥＣＵ７は、圧力センサ６における圧力検出結果及び車速センサ１６の車速検出結果等に基づいて、車両バンパ２へ歩行者（すなわち、人体）が衝突したか否かを判別する処理を実行する。歩行者保護装置ＥＣＵ７は、歩行者衝突と判定した場合には、歩行者保護装置３に対し信号を出力し、歩行者保護装置３を作動させる。   The pedestrian protection device ECU 7 is an electronic control device that is connected to the pressure sensor 6 and performs start-up control of the pedestrian protection device 3 disposed in the vehicle body, and a signal output from the pressure sensor 6 is a signal line. It is configured to be input via 7a. The pedestrian protection device ECU 7 executes a process of determining whether or not a pedestrian (ie, a human body) has collided with the vehicle bumper 2 based on the pressure detection result of the pressure sensor 6 and the vehicle speed detection result of the vehicle speed sensor 16. To do. When the pedestrian protection device ECU 7 determines that a pedestrian collision has occurred, the pedestrian protection device ECU 7 outputs a signal to the pedestrian protection device 3 to activate the pedestrian protection device 3.

歩行者保護装置３はポップアップフード、ポップアップエンジンフード、アクティブボンネット、アクティブフード、カウルエアバッグ、フードエアバッグ等の名称で呼ばれる公知のものを採用することができる。歩行者保護装置３は、エンジンフードの後端を衝突検知後瞬時に上昇させ、クリアランスを大きくさせることでフード自体の吸収ストロークが増大し、歩行者（特に頭部）がエンジンなどの硬い部材に衝突する可能性を低減することができる。   As the pedestrian protection device 3, known devices called by names such as a pop-up hood, a pop-up engine hood, an active bonnet, an active hood, a cowl airbag, and a hood airbag can be adopted. The pedestrian protection device 3 raises the rear end of the engine hood instantaneously after collision detection and increases the clearance to increase the absorption stroke of the hood itself, so that the pedestrian (particularly the head) can be a hard member such as an engine. The possibility of collision can be reduced.

次に、本実施形態の車両用衝突検知装置１による衝突の検知について説明する。車両のバンパ２に歩行者が衝突すると、歩行者の体（主に脚部）がバンパ２を押圧することとなり、バンパカバー８を介してチャンバ部材５を押圧し、チャンバ部材５の押圧された部分が変形し潰れる。チャンバ部材５の変形によりチャンバ空間４における気体圧力が増大する。この圧力の増大が延設部１２に取り付けられた圧力センサ６により検出され、出力される信号が信号線７ａを介して歩行者保護装置ＥＣＵ７に送られる。そして、歩行者保護装置ＥＣＵ７が圧力検出結果に基づいて、バンパ２へ歩行者（すなわち、人体）が衝突したか否かを判別する処理を実行する。   Next, detection of a collision by the vehicle collision detection apparatus 1 of the present embodiment will be described. When a pedestrian collides with the bumper 2 of the vehicle, the body (mainly the leg) of the pedestrian presses the bumper 2, presses the chamber member 5 through the bumper cover 8, and the chamber member 5 is pressed. The part is deformed and crushed. The gas pressure in the chamber space 4 increases due to the deformation of the chamber member 5. This increase in pressure is detected by the pressure sensor 6 attached to the extending portion 12, and an output signal is sent to the pedestrian protection device ECU 7 via the signal line 7a. And pedestrian protection apparatus ECU7 performs the process which discriminate | determines whether the pedestrian (namely, human body) collided with the bumper 2 based on the pressure detection result.

以上、説明したことから明らかなように、車両用衝突検知装置１は、車両バンパ２内でバンパリーンフォース１０の前面に配設されチャンバ空間４を内部に形成してなるチャンバ本体１１を有するチャンバ部材５と、チャンバ空間４内の圧力を検出する圧力センサ６とを備え、圧力センサ６による圧力検出結果に基づいて車両バンパ２への衝突を検知するように構成された装置であって、チャンバ部材５は、チャンバ空間４を外部に連通させる呼吸孔２３を有し、呼吸孔２３には、フィルタ部材３１が取りつけられている。   As is apparent from the above description, the vehicle collision detection apparatus 1 includes a chamber body 11 that is disposed in front of the bumper force 10 in the vehicle bumper 2 and has a chamber space 4 formed therein. An apparatus comprising a member 5 and a pressure sensor 6 for detecting a pressure in the chamber space 4, and configured to detect a collision with the vehicle bumper 2 based on a pressure detection result by the pressure sensor 6. The member 5 has a breathing hole 23 that allows the chamber space 4 to communicate with the outside, and a filter member 31 is attached to the breathing hole 23.

この構成によれば、呼吸孔２３にフィルタ部材３１が取りつけられているため、通気性を確保しつつチャンバ部材５内部への異物の侵入を防止することができる。例えば、車両が悪路や泥水で冠水した道路を走行してもフィルタ部材３１によって泥水の侵入を防止することができるので、呼吸孔２３が砂や泥で塞がれることがない。また、呼吸孔２３から昆虫やクモが侵入することもなく、営巣により呼吸孔２３が塞がれることもない。よって、呼吸孔２３の呼吸機能が確保され、信頼性の高い衝突検知を行うことができる。   According to this configuration, since the filter member 31 is attached to the breathing hole 23, it is possible to prevent entry of foreign matter into the chamber member 5 while ensuring air permeability. For example, even if the vehicle travels on a rough road or a road flooded with muddy water, the filter member 31 can prevent muddy water from entering, so the breathing hole 23 is not blocked by sand or mud. Further, insects and spiders do not enter from the breathing hole 23, and the breathing hole 23 is not blocked by the nesting. Therefore, the breathing function of the breathing hole 23 is ensured, and highly reliable collision detection can be performed.

また、呼吸孔２３は、チャンバ部材５の背面側に設けられている。この構成によれば、冠水した道路を走行して呼吸孔２３が冠水したとしても、前方からの被水が少ないため確実に呼吸機能を確保することができる。また、チャンバ部材５の背面側は、氷雪路を走行した場合、雪等が付着する可能性を低くすることができる。   The breathing hole 23 is provided on the back side of the chamber member 5. According to this configuration, even if the breathing hole 23 is submerged by traveling on a flooded road, the respiratory function can be reliably ensured because there is little water exposure from the front. Moreover, when the back surface side of the chamber member 5 runs on an icy and snowy road, it is possible to reduce the possibility that snow or the like adheres.

また、チャンバ部材５には、呼吸孔２３を有するインサートブラケット２１が取り付けられ、フィルタ部材３１は、インサートブラケット２１を介してチャンバ部材５に取り付けられている。チャンバ部材５が低密度ポリエチレンのような接着性の低く、柔らかい材料から形成されていても、硬質のインサートブラケット２１を介することで強固にフィルタ部材３１を固定可能である。特に、インサートブラケット２１は、軟質性のチャンバ部材５にインサート成形されることにより容易且つ確実に固定される。   An insert bracket 21 having a breathing hole 23 is attached to the chamber member 5, and a filter member 31 is attached to the chamber member 5 via the insert bracket 21. Even if the chamber member 5 is formed of a soft material such as low density polyethylene having low adhesiveness, the filter member 31 can be firmly fixed through the hard insert bracket 21. In particular, the insert bracket 21 is easily and reliably fixed by being insert-molded into the flexible chamber member 5.

また、インサートブラケット２１は、フィルタ部材３１の少なくとも上部を覆う傘部２５を備えている。この構成によれば、水はね等で少量の水がかかっても、フィルタ部材３１内部に水が侵入することを防ぐことができる。   The insert bracket 21 includes an umbrella portion 25 that covers at least the upper portion of the filter member 31. According to this configuration, even when a small amount of water is splashed with water splash or the like, it is possible to prevent water from entering the filter member 31.

また、チャンバ部材５は、本体部１１から延設され且つ内部がチャンバ空間４に連通する延設部１３を備え、呼吸孔２３は延設部１３に設けられている。この構成によれば、延設部１３に設けられたインサートブラケット２１に呼吸孔２３が設けられているので、衝突時のチャンバ部材５の変形を阻害せず、衝突を精度よく検出することができる。特に、延設部１３は、チャンバ部材５の上面に設けられているので、車両後方側に隣接するバンパリーンフォース１０側に特別な加工を要さず、呼吸孔２３を設けることができる。   The chamber member 5 includes an extending portion 13 that extends from the main body 11 and communicates with the chamber space 4 inside. The breathing hole 23 is provided in the extending portion 13. According to this configuration, since the breathing hole 23 is provided in the insert bracket 21 provided in the extending portion 13, the collision can be accurately detected without hindering the deformation of the chamber member 5 at the time of the collision. . In particular, since the extending portion 13 is provided on the upper surface of the chamber member 5, the breathing hole 23 can be provided without requiring special processing on the bumper force 10 side adjacent to the vehicle rear side.

また、フィルタ部材３１は、通気を確保しつつ水の侵入を防止可能な通気膜３３を有する。この構成によれば、チャンバ部材５内部に泥水や虫類が侵入することを防止でき、呼吸孔２３の機能を確保し、信頼性の高い衝突検知を行うことができる。さらに、水の侵入を防止可能なため、内部に侵入した水が氷結する等の心配がない。特に、通気膜３３は、ポリテトラフルオロエチレン多孔質膜であるので、撥水性、耐熱性、耐薬品性にすぐれた通気膜とすることができる。また、二軸延伸することにより、容易に多孔質膜を作成でき、延伸倍率を変えることにより、相反する特性である通気量と耐水度を、ある程度のものとすることができる。   Further, the filter member 31 has a gas permeable membrane 33 that can prevent water from entering while ensuring ventilation. According to this configuration, muddy water and insects can be prevented from entering the chamber member 5, the function of the breathing hole 23 can be ensured, and highly reliable collision detection can be performed. Furthermore, since it is possible to prevent water from entering, there is no concern that the water that has entered inside freezes. In particular, since the gas permeable film 33 is a polytetrafluoroethylene porous film, the gas permeable film is excellent in water repellency, heat resistance, and chemical resistance. Moreover, a porous film can be easily created by biaxial stretching, and by changing the stretching ratio, the air flow rate and water resistance, which are contradictory properties, can be made to some extent.

また、フィルタ部材３１は、通気膜３３を支持する支持体３２と、通気膜３３を覆うと共に支持体３２との間に開口３５を形成するカバー部材としてのカバー３４をさらに有し、カバー３４と支持体３２とが開口３５と通気膜３３との間にラビリンス構造の通気経路を形成している。この構成によれば、砂、小石などの大きな異物の衝突による通気膜３３の破損を防止できると共に、ラビリンス構造の通気経路によりフィルタ部材３１内部に水分が侵入しにくくなっている。   The filter member 31 further includes a support 32 that supports the gas permeable membrane 33, and a cover 34 that covers the gas permeable membrane 33 and forms an opening 35 between the support 32 and the cover 34. The support 32 forms a ventilation path with a labyrinth structure between the opening 35 and the ventilation film 33. According to this configuration, it is possible to prevent the air-permeable membrane 33 from being damaged due to the collision of large foreign matters such as sand and pebbles, and it is difficult for moisture to enter the filter member 31 by the air passage of the labyrinth structure.

また、フィルタ部材３１は、バンパリーンフォース１０前面よりも車両後方に設けられているので、衝突によるチャンバ部材５の変形が直接、フィルタ部材３１に影響を与えず脱落しにくい構造となっている。
（第１変形例）
上記実施形態では、呼吸孔２３を延設部１３の背面に設ける構成としたが、図９に示すように、呼吸孔用の延設部１３を設けることなく、本体部１１の背面に設ける構成としてもよい。この場合、バンパリーンフォース１０の前面に孔開け加工を施して開口を形成し、当該開口を通してフィルタ部材３１を配設するようにしてもよい。本変形例では、チャンバ部材５に呼吸孔用の延設部１３を設ける必要が無くなるため、チャンバ部材５がより単純な形状となる。
（第２変形例）
上記実施形態では、延設部１３の背面に呼吸孔２３を設ける構成としたが、図１０に示すように延設部１３を圧力センサ６用の延設部１２と同様の形状とし、上面に呼吸孔２３を設けてもよい。本変形例によれば、呼吸孔２３が延設部１３の上面に設けられているので、フィルタ部材３１の取り付け位置を車両後方にずらすことができ、配置の自由度が向上する。
（第３変形例）
実施形態では、延設部１３を本体部１１の上方に設ける構成としたが、図１１に示すように、延設部１３を本体部１１の車両幅方向の端部に設けて、呼吸孔２３、フィルタ部材３１を設ける構成としてもよい。通常、チャンバ部材５は、バンパリーンフォース１０とほぼ同じ車幅方向の寸法を有しているが、図１１に示す変形例では、車両の左側において、バンパリーンフォース１０の前面部分を本体部１１とし、バンパリーンフォース１０より車両側方に突出した部分に延設部１３を設けている。なお、図１１では、バンパカバー８の図示は省略している。また、図１１に示す変形例では、延設部１３、呼吸孔２３、フィルタ部材３１を車両左側に設ける例を示したが、車両右側、または両側に設けてもよい。 Further, since the filter member 31 is provided at the rear of the vehicle with respect to the front surface of the bumper force 10, the structure is such that deformation of the chamber member 5 due to a collision does not directly affect the filter member 31 and does not easily fall off.
(First modification)
In the above-described embodiment, the breathing hole 23 is provided on the back surface of the extending portion 13. However, as illustrated in FIG. 9, the breathing hole 23 is provided on the back surface of the main body portion 11 without providing the extending portion 13 for the breathing hole. It is good. In this case, an opening may be formed on the front surface of the bumper force 10 to form an opening, and the filter member 31 may be disposed through the opening. In this modification, the chamber member 5 does not need to be provided with the extended portion 13 for the breathing hole, so that the chamber member 5 has a simpler shape.
(Second modification)
In the above embodiment, the breathing hole 23 is provided on the back surface of the extending portion 13, but the extending portion 13 has the same shape as the extending portion 12 for the pressure sensor 6 as shown in FIG. A breathing hole 23 may be provided. According to this modification, since the breathing hole 23 is provided on the upper surface of the extending portion 13, the attachment position of the filter member 31 can be shifted rearward of the vehicle, and the degree of freedom in arrangement is improved.
(Third Modification)
In the embodiment, the extending portion 13 is provided above the main body portion 11. However, as shown in FIG. 11, the extending portion 13 is provided at the end of the main body portion 11 in the vehicle width direction, and the breathing hole 23. The filter member 31 may be provided. Normally, the chamber member 5 has substantially the same vehicle width direction dimension as that of the bumper force 10, but in the modified example shown in FIG. 11, the front portion of the bumper force 10 is formed on the main body 11 on the left side of the vehicle. The extending portion 13 is provided at a portion protruding from the bumper force 10 toward the vehicle side. In FIG. 11, the illustration of the bumper cover 8 is omitted. Further, in the modification shown in FIG. 11, the example in which the extending portion 13, the breathing hole 23, and the filter member 31 are provided on the left side of the vehicle is shown.

本変形例によれば、延設部１３は、バンパリーンフォース１０の車幅方向端部よりも車両側方に設けられているので、バンパリーンフォース１０に加工を要することなく配置することができる。また、衝突時のチャンバ部材５の変形を阻害せず、衝突を精度よく検出することができる。   According to this modification, the extended portion 13 is provided on the side of the vehicle with respect to the vehicle width direction end portion of the bumper force 10, so that the bumper force 10 can be disposed without requiring processing. . Further, the collision can be detected with high accuracy without hindering the deformation of the chamber member 5 at the time of the collision.

なお、本発明は上述した実施の形態に限定されるものではなく、本発明の主旨を逸脱しない範囲で種々の変更を施すことが可能であることはいうまでもない。   Note that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

フィルタ部材３１を支持体３２に対して接着剤にて接着するものとしたが、両面テープによる接着や、熱溶着や超音波溶着によるものであってもよい。   Although the filter member 31 is bonded to the support 32 with an adhesive, the filter member 31 may be bonded by a double-sided tape, heat welding, or ultrasonic welding.

また、チャンバ部材５は低密度ポリエチレンを材質として採用した例を示したが、他の材質を用いてもよい。また、チャンバ部材５は一体的に形成されたものでなくともよい。   Moreover, although the chamber member 5 showed the example which employ | adopted the low density polyethylene as a material, you may use another material. Further, the chamber member 5 may not be formed integrally.

また、チャンバ部材５に使用する低密度ポリエチレンは接着性が低いため、インサートブラケット２１を介して、フィルタ部材３１をチャンバ部材５に取り付けることとしたが、接着力が保証できる良好な接着剤が得られた場合や、チャンバ部材５を別の材質で構成できる場合は、インサートブラケット２１を設けることなく、チャンバ部材５に直接、フィルタ部材３１の通気膜３３等を取り付ける構成としてもよい。   Further, since the low density polyethylene used for the chamber member 5 has low adhesiveness, the filter member 31 is attached to the chamber member 5 via the insert bracket 21. However, a good adhesive that can guarantee the adhesive force is obtained. If the chamber member 5 can be made of another material, the gas permeable membrane 33 of the filter member 31 or the like may be directly attached to the chamber member 5 without providing the insert bracket 21.

１ 車両用衝突検知装置
２ バンパ
４ チャンバ空間
５ チャンバ部材
６ 圧力センサ
１０ バンパリーンフォース
１１ 本体部
１２ 延設部（圧力センサ用）
１３ 延設部（呼吸孔用）
２１ インサートブラケット
２３ 呼吸孔
３１ フィルタ部材 DESCRIPTION OF SYMBOLS 1 Vehicle collision detection apparatus 2 Bumper 4 Chamber space 5 Chamber member 6 Pressure sensor 10 Bumper force 11 Main-body part 12 Extension part (for pressure sensors)
13 Extension (for breathing holes)
21 Insert bracket 23 Breathing hole 31 Filter member

Claims (12)

車両バンパ（２）内でバンパリーンフォース（１０）の前面に配設されチャンバ空間（４）を内部に形成してなるチャンバ本体（１１）を有するチャンバ部材（５）と、前記チャンバ空間（４）内の圧力を検出する圧力センサ（６）とを備え、前記圧力センサによる圧力検出結果に基づいて前記車両バンパへの衝突を検知するように構成された車両用衝突検知装置（１）において、
前記チャンバ部材は、前記チャンバ空間を外部に連通させる呼吸孔（２３）を有し、
前記呼吸孔には、フィルタ部材（３１）が取りつけられていることを特徴とする車両用衝突検知装置。 A chamber member (5) having a chamber body (11) disposed in front of the bumper force (10) in the vehicle bumper (2) and having a chamber space (4) formed therein, and the chamber space (4) In the vehicle collision detection device (1), which is configured to detect a collision with the vehicle bumper based on a pressure detection result by the pressure sensor.
The chamber member has a breathing hole (23) for communicating the chamber space with the outside,
A vehicle collision detection apparatus, wherein a filter member (31) is attached to the breathing hole. 前記呼吸孔は、前記チャンバ部材の背面側に設けられていることを特徴とする請求項１に記載の車両用衝突検知装置。   The vehicle collision detection device according to claim 1, wherein the breathing hole is provided on a back side of the chamber member. 前記チャンバ部材には、前記呼吸孔を有するブラケット部材（２１）が取り付けられ、
前記フィルタ部材は、前記ブラケット部材を介して前記チャンバ部材に取り付けられていることを特徴とする請求項１又は２に記載の車両用衝突検知装置。 A bracket member (21) having the breathing hole is attached to the chamber member,
3. The vehicle collision detection device according to claim 1, wherein the filter member is attached to the chamber member via the bracket member. 4. 前記ブラケット部材は、前記チャンバ部材にインサート成形されるインサートブラケット（２１）からなることを特徴とする請求項３に記載の車両用衝突検知装置。   The collision detection device for a vehicle according to claim 3, wherein the bracket member includes an insert bracket (21) which is insert-molded into the chamber member. 前記ブラケット部材は、前記フィルタ部材の少なくとも上部を覆う傘部（２５）を備えたことを特徴とする請求項３又は４に記載の車両用衝突検知装置。   5. The vehicle collision detection device according to claim 3, wherein the bracket member includes an umbrella portion (25) that covers at least an upper portion of the filter member. 前記チャンバ部材は、前記チャンバ本体から延設され且つ内部が前記チャンバ空間に連通する延設部（１３）を備え、
前記呼吸孔は、前記延設部に設けられていることを特徴とする請求項１乃至５のいずれか１項に記載の車両用衝突検知装置。 The chamber member includes an extending portion (13) that extends from the chamber body and communicates with the chamber space.
The vehicle collision detection device according to claim 1, wherein the breathing hole is provided in the extending portion. 前記延設部は、前記チャンバ部材の上面に設けられていることを特徴とする請求項６に記載の車両用衝突検知装置。   The vehicle collision detection device according to claim 6, wherein the extending portion is provided on an upper surface of the chamber member. 前記延設部は、前記バンパリーンフォースの車幅方向端部よりも車両側方に設けられていることを特徴とする請求項６に記載の車両用衝突検知装置。   The vehicular collision detection device according to claim 6, wherein the extended portion is provided on a side of the vehicle with respect to a vehicle width direction end portion of the bumper force. 前記フィルタ部材は、通気を確保しつつ水の侵入を防止可能な通気膜（３３）を有することを特徴とする請求項１乃至８のいずれか１項に記載の車両用衝突検知装置。   9. The vehicle collision detection device according to claim 1, wherein the filter member has a ventilation film (33) capable of preventing water from entering while ensuring ventilation. 前記通気膜は、ポリテトラフルオロエチレン多孔質膜であることを特徴とする請求項９に記載の車両用衝突検知装置。   The vehicle collision detection device according to claim 9, wherein the gas permeable membrane is a polytetrafluoroethylene porous membrane. 前記フィルタ部材は、前記通気膜を支持する支持体（３２）と、前記通気膜を覆うと共に前記支持体との間に開口を形成するカバー部材（３４）をさらに有し、前記カバー部材と前記支持体とが前記開口と前記通気膜との間にラビリンス構造の通気経路を形成していることを特徴とする請求項９又は１０に記載の車両用衝突検知装置。   The filter member further includes a support (32) that supports the gas permeable membrane, and a cover member (34) that covers the gas permeable membrane and forms an opening between the support and the cover member. The vehicle collision detection device according to claim 9 or 10, wherein the support body forms a ventilation path of a labyrinth structure between the opening and the ventilation film. 前記フィルタ部材は、前記バンパリーンフォース前面よりも車両後方に設けられたことを特徴とする請求項１乃至１１のいずれか１項に記載の車両用衝突検知装置。   12. The vehicle collision detection device according to claim 1, wherein the filter member is provided behind the front surface of the bumper force.
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