JP3193986B2 - Impact detection weight - Google Patents
Impact detection weightInfo
- Publication number
- JP3193986B2 JP3193986B2 JP02214192A JP2214192A JP3193986B2 JP 3193986 B2 JP3193986 B2 JP 3193986B2 JP 02214192 A JP02214192 A JP 02214192A JP 2214192 A JP2214192 A JP 2214192A JP 3193986 B2 JP3193986 B2 JP 3193986B2
- Authority
- JP
- Japan
- Prior art keywords
- copper
- weight
- impact
- tungsten
- impact detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 title claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 26
- 229910052802 copper Inorganic materials 0.000 claims description 26
- 239000010949 copper Substances 0.000 claims description 26
- 229910001080 W alloy Inorganic materials 0.000 claims description 12
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 6
- 229910052721 tungsten Inorganic materials 0.000 description 6
- 239000010937 tungsten Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000005219 brazing Methods 0.000 description 4
- 238000005304 joining Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical group [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000003657 tungsten Chemical class 0.000 description 1
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、乗用車の安全装置であ
るエアバッグシステムに使用される衝撃検出用の重錘に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weight for detecting an impact used in an airbag system as a safety device for a passenger car.
【０００２】[0002]
【従来の技術】最近、乗用車の安全性について関心が高
まっているが、中でも乗員保護装置としてのエアバッグ
システムが注目を集めており、すでに数種の車に実装さ
れている。このエアバッグシステムは、車が衝突した時
にその衝突の衝撃を衝撃センサで検出し、ガス発生装置
を作動させて、例えばステアリングホイ−ルパッドの中
に収納しているエアバッグをガスで膨張させ、乗員を保
護するものである。2. Description of the Related Art Recently, attention has been paid to the safety of passenger cars. Among them, an airbag system as an occupant protection device has attracted attention, and has already been mounted on several types of vehicles. In this airbag system, when a vehicle collides, the impact of the collision is detected by an impact sensor, and a gas generator is operated to inflate an airbag housed in, for example, a steering wheel pad with gas. It protects occupants.
【０００３】車の衝突の際の衝撃を検出する衝撃センサ
には、種々のものが考えられているが、その内のひとつ
として、図３及び図４に示すように、重錘１を取り付け
た偏心ロ−タ５を常時はバネの力でストッパ６に押し付
けておき、衝突時の減速力により前記ロ−タを回転させ
て該ロ−タに設けた回転接点７を固定接点８に接触さ
せ、衝突信号を発生させるものがある。この種のセンサ
に設けられる重錘は、タングステン合金等の高密度の金
属材料で作られるが、これらの合金は、一般に加工が困
難であるので、前記ロ−タ等の部材に取り付けるため
に、銅等の加工の容易な金属の塊を銀ろう等のろう材で
接合して取り付け部を形成している。[0003] Various types of impact sensors for detecting an impact at the time of a vehicle collision are considered, and as one of them, a weight 1 is attached as shown in FIGS. The eccentric rotor 5 is normally pressed against the stopper 6 by the force of a spring, and the rotor is rotated by the deceleration force at the time of collision so that the rotating contact 7 provided on the rotor contacts the fixed contact 8. Some of them generate a collision signal. The weight provided in this type of sensor is made of a high-density metal material such as a tungsten alloy. However, since these alloys are generally difficult to process, they are required to be attached to the rotor or the like. An attachment portion is formed by joining a lump of easily processed metal such as copper with a brazing material such as silver brazing.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記タ
ングステン合金に銅をろう接する方法は、ろう接の信頼
性に問題があり、衝撃を受けた時等に重錘が脱落する恐
れがあった。これを避けるため、全体を銅で製作するこ
とも試みられたが、銅の比重はタングステンほど大きく
はないので、重錘の体積が大きくなり、収納場所に困る
という問題があった。そこで本発明は、高比重のタング
ステン合金を用い、しかも取り付け部の接合強度を向上
させた重錘を提供することを課題としている。However, the method of brazing copper to the tungsten alloy has a problem in the reliability of brazing, and there is a risk that the weight may fall off when subjected to an impact or the like. In order to avoid this, an attempt has been made to fabricate the entire body with copper. However, since the specific gravity of copper is not as large as that of tungsten, there has been a problem that the volume of the weight becomes large and the storage space is troublesome. Therefore, an object of the present invention is to provide a weight using a tungsten alloy having a high specific gravity and further improving the bonding strength of a mounting portion.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するた
め、本発明は、次のような構成を採用した。すなわち、
本発明にかかる衝撃検出用重錘は、銅−タングステン合
金で作られた本体の端部に、該銅−タングステン合金中
の銅成分と溶融一体化した銅塊で形成した取り付け部を
設けたことを特徴としている。In order to solve the above problems, the present invention employs the following configuration. That is,
The weight for impact detection according to the present invention is characterized in that an attachment portion formed of a copper mass fused and integrated with a copper component in the copper-tungsten alloy is provided at an end of a body made of a copper-tungsten alloy. It is characterized by.
【０００６】[0006]
【作用】この衝撃検出用重錘は、銅−タングステン合金
製の本体の端部に、該合金中の銅成分と溶融一体化した
銅塊が設けられ、この部分に取り付け部を形成するの
で、取り付け部の成形加工が容易であると共に、重錘本
体に対する接合強度がきわめて大きくなる。In this impact detection weight, a copper mass fused and integrated with a copper component in the copper-tungsten alloy is provided at an end of a body made of a copper-tungsten alloy, and an attachment portion is formed in this portion. The forming process of the mounting portion is easy, and the joining strength with respect to the weight body becomes extremely large.
【０００７】[0007]
【実施例】以下、図面に表された実施例について説明す
る。この衝撃検出用重錘１は、本体２と、該本体の上端
部に一体に接合された取り付け部３からなる。本体２
は、比重１５以上の金属材料で作るのが好ましく、実施
例では、重量比で銅を１０〜３０％含有する銅−タング
ステン合金で作られている。この銅を、ニッケル−銅合
金、ニッケル−鉄合金で置き換えたいわゆるヘビーアロ
イとしてもよい。タングステン以外の金属の量がこれよ
りも多くなると合金の比重が低くなるので好ましくな
い。また、タングステン以外の金属の量がこれよりも少
ないと、製造が困難になると共に、十分な接合強度を得
る上で問題が生じやすい。この重錘本体は、公知の粉末
や金法でタングステン（微量のニッケル等を含んでいて
もよい）の多孔質スケルトンを製作し、然る後、このス
ケルトンに銅を溶浸させる方法で製造することができ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the drawings will be described below. The impact detection weight 1 includes a main body 2 and a mounting portion 3 integrally joined to an upper end of the main body. Body 2
Is preferably made of a metal material having a specific gravity of 15 or more, and in the embodiment, is made of a copper-tungsten alloy containing 10 to 30% of copper by weight. The copper may be replaced with a nickel-copper alloy or a nickel-iron alloy to form a so-called heavy alloy. If the amount of the metal other than tungsten is greater than this, the specific gravity of the alloy is undesirably low. If the amount of the metal other than tungsten is smaller than this, the production becomes difficult, and problems tend to occur in obtaining sufficient bonding strength. This weight body is manufactured by a method of manufacturing a porous skeleton of tungsten (which may contain a trace amount of nickel or the like) by a known powder or gold method, and then infiltrating the skeleton with copper. be able to.
【０００８】本体２の上部に一体に設けられている取り
付け部３は、銅（無酸素銅）もしくは銅合金で構成され
る。その接合方法は、上記タングステンスケルトンに対
する銅の溶浸工程において、溶浸に必要な量以上の余分
な銅を供給し、溶浸の終了時に一緒に固化させる方法を
採用するのが便利である。この他に、銅−タングステン
合金を製造した後、あらためて銅を載せて溶融させ、合
金中の銅成分と一体化させる方法もある。取り付け部を
構成する銅の中に少量のニッケル等が含まれていてもよ
い。The mounting portion 3 integrally provided on the upper portion of the main body 2 is made of copper (oxygen-free copper) or a copper alloy. As the joining method, it is convenient to adopt a method of supplying an extra amount of copper more than necessary for the infiltration and solidifying it together at the end of the infiltration in the step of infiltrating the tungsten skeleton with copper. In addition, there is a method in which after the copper-tungsten alloy is manufactured, copper is again placed and melted, and integrated with the copper component in the alloy. A small amount of nickel or the like may be included in the copper constituting the attachment portion.
【０００９】取り付け部が一体化した重錘は、必要な機
械加工を施して製品とする。このようにして製造される
重錘は、高比重の重錘本体２に加工性に富んだ銅製取り
付け部３が設けられ、しかもこの取り付け部を構成する
銅が本体中の銅成分と溶融一体化しているので、接合強
度が高く、しかも取り付け部による組付けが容易であ
る。なお、重錘本体は、タングステンを含有するので、
腐食性の雰囲気中では腐食が進行し、その生成物が接点
等に悪影響を及ぼす恐れがある。このため、全体または
タングステンを含む本体の部分にニッケルメッキ等を施
して保護層を形成しておくのが好ましい。The weight having the integrated mounting portion is subjected to necessary machining to form a product. The weight manufactured in this manner is provided with a highly attachable copper attachment portion 3 on the weight body 2 having a high specific gravity, and the copper constituting the attachment portion is melted and integrated with the copper component in the body. Therefore, the bonding strength is high, and the assembling by the mounting portion is easy. In addition, since the weight body contains tungsten,
Corrosion proceeds in a corrosive atmosphere, and the products may adversely affect contacts and the like. For this reason, it is preferable to form a protective layer by applying nickel plating or the like to the entirety or the main body portion containing tungsten.
【００１０】[0010]
【発明の効果】以上の説明から明らかなように、本発明
にかかる衝撃検出用重錘は、比重の高い銅−タングステ
ン合金で本体を形成し、これに加工性に優れた銅製の取
り付け部を接合したもので、取り付け部を構成する銅
と、本体中の銅成分とを溶融一体化することにより両者
を強固に接合したものであるから、接合の信頼性が大幅
に向上し、使用時における耐久性にすぐれたものとなっ
た。As is apparent from the above description, the impact detecting weight according to the present invention has a main body formed of a copper-tungsten alloy having a high specific gravity, and a copper mounting portion excellent in workability. The two parts are firmly joined by melting and integrating the copper that constitutes the mounting part and the copper component in the body, so the reliability of the joining has been greatly improved, It became excellent in durability.
【図１】本発明の実施例の断面図である。FIG. 1 is a sectional view of an embodiment of the present invention.
【図２】その平面図である。FIG. 2 is a plan view thereof.
【図３】衝撃の生じない状態を表す使用法の説明図であ
る。FIG. 3 is an explanatory diagram of a usage method showing a state in which no impact occurs.
【図４】衝撃時の状態を表す使用法の説明図である。FIG. 4 is an explanatory diagram of a usage method showing a state at the time of impact.
１ 衝撃検出用重錘 ２ 本体 ３ 取り付け部 ５ 偏心ロ−タ ６ ストッパ ７ 回転接点 ８ 固定接点 DESCRIPTION OF SYMBOLS 1 Impact detection weight 2 Main body 3 Mounting part 5 Eccentric rotor 6 Stopper 7 Rotary contact 8 Fixed contact
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭47−33744（ＪＰ，Ａ) 特開 平１−120718（ＪＰ，Ａ) 特開 平２−107741（ＪＰ，Ａ) 特開 昭59−78638（ＪＰ，Ａ) 実開 平１−59867（ＪＰ，Ｕ) 実開 昭62−140425（ＪＰ，Ｕ) 実開 平２−124749（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01P 15/135 G01P 15/02 H01H 35/14 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-47-33744 (JP, A) JP-A-1-120718 (JP, A) JP-A-2-107774 (JP, A) JP-A-59-1979 78638 (JP, A) Japanese Utility Model Application 1-59867 (JP, U) Japanese Utility Model Application 62-140425 (JP, U) Japanese Utility Model Application 2-1424749 (JP, U) (58) Field surveyed (Int. 7 , DB name) G01P 15/135 G01P 15/02 H01H 35/14
Claims (1)
端部に、該銅−タングステン合金中の銅成分と溶融一体
化した銅塊で形成した取り付け部を設けてなる衝撃検出
用重錘。1. A weight for impact detection, comprising an end portion of a main body made of a copper-tungsten alloy and an attachment portion formed of a copper lump fused and integrated with a copper component in the copper-tungsten alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02214192A JP3193986B2 (en) | 1992-01-11 | 1992-01-11 | Impact detection weight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02214192A JP3193986B2 (en) | 1992-01-11 | 1992-01-11 | Impact detection weight |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05188075A JPH05188075A (en) | 1993-07-27 |
| JP3193986B2 true JP3193986B2 (en) | 2001-07-30 |
Family
ID=12074600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02214192A Expired - Fee Related JP3193986B2 (en) | 1992-01-11 | 1992-01-11 | Impact detection weight |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3193986B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5032280B2 (en) * | 2007-11-27 | 2012-09-26 | セイコーインスツル株式会社 | Acceleration sensor manufacturing method and acceleration sensor |
| JP4865686B2 (en) * | 2007-11-27 | 2012-02-01 | セイコーインスツル株式会社 | Acceleration sensor manufacturing method and acceleration sensor |
-
1992
- 1992-01-11 JP JP02214192A patent/JP3193986B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05188075A (en) | 1993-07-27 |
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