JPH08192722A - Pretensioner for seat belt device - Google Patents

Pretensioner for seat belt device

Info

Publication number
JPH08192722A
JPH08192722A JP7186387A JP18638795A JPH08192722A JP H08192722 A JPH08192722 A JP H08192722A JP 7186387 A JP7186387 A JP 7186387A JP 18638795 A JP18638795 A JP 18638795A JP H08192722 A JPH08192722 A JP H08192722A
Authority
JP
Japan
Prior art keywords
casing
pretensioner
deformable member
rotating body
seat belt
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.)
Granted
Application number
JP7186387A
Other languages
Japanese (ja)
Other versions
JP3617859B2 (en
Inventor
Yasuhiro Inagawa
泰博 稲川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ashimori Industry Co Ltd
Original Assignee
Ashimori Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ashimori Industry Co Ltd filed Critical Ashimori Industry Co Ltd
Priority to JP18638795A priority Critical patent/JP3617859B2/en
Publication of JPH08192722A publication Critical patent/JPH08192722A/en
Application granted granted Critical
Publication of JP3617859B2 publication Critical patent/JP3617859B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Automotive Seat Belt Assembly (AREA)

Abstract

PURPOSE: To make the winding-tightening of a webbing possible without synchronizing a winding shaft and its driving means by miniaturizing a pretensioner. CONSTITUTION: A pretensioner for a seat belt device has a winding shaft which is rotated aracl energized in the winding direction of a webbing 14; a casing 200 to form the flow-in port 205 of gas discharged from a gas generator; a rotary body 40 which is arranged in the casing and rotates unitedly with the winding shaft; and an actuating body 500 which is arranged in the casing and moved by gas pressure to engage with the rotary body. A deformable member 503 is interposed between the rotary body and the actuating body, and the gas generator functions to move the actuating body, and the rotary body engaging with the deformable body is thereby rotated to wind the webbing.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、車両衝突時に、乗員が
着用するシートベルトのウエビングを引き締めてその弛
みを取り、乗員の前方への移動を最小限に抑制するシー
トベルト装置のプリテンショナに係り、特に、ガス圧に
よりシートベルト・リトラクタの巻取軸を巻取方向に回
転させて、ウエビングの弛みを巻取軸上に巻き取って除
去するシートベルト装置のプリテンショナに関するもの
である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pretensioner for a seat belt device which restrains the forward movement of the occupant to a minimum by tightening the webbing of the seat belt worn by the occupant to remove the slack in a vehicle collision. More particularly, the present invention relates to a pretensioner for a seat belt device that rotates a take-up shaft of a seat belt retractor in a take-up direction by gas pressure to take up slack of a webbing on the take-up shaft and remove it.

【0002】[0002]

【従来の技術】車両用シートベルト装置は、車両衝突時
に、ウエビングで乗員を拘束するようになっている。そ
して、このウエビングの巻取装置は、ウエビングによる
圧迫感を乗員へ与えないようにするため、その巻取力を
比較的弱くしてある。その結果、シートベルトの使用状
態では、ウエビングと乗員との間に若干の隙間が存在す
るようになる。それゆえ、車両衝突時に巻取装置からの
ウエビングの引き出しが停止されても、乗員がウエビン
グで確実に拘束されるまでに、乗員がこの隙間分だけ衝
突方向へ移動することが予想される。
2. Description of the Related Art A vehicle seat belt device is designed to restrain an occupant with a webbing in the event of a vehicle collision. The webbing take-up device has a relatively weak take-up force in order to prevent the occupant from feeling the pressure of the webbing. As a result, when the seat belt is in use, there is a slight gap between the webbing and the occupant. Therefore, even if the pulling-out of the webbing from the winding device is stopped at the time of a vehicle collision, it is expected that the occupant will move in the collision direction by this gap before the occupant is reliably restrained by the webbing.

【0003】そこで、車両衝突時にウエビングを引き締
めて弛みを除去するシートベルト装置のプリテンショナ
が提供されている。従来、この種のプリテンショナに
は、緊急時にガス発生器を作動させて、このガス圧によ
りシートベルト・リトラクタの巻取軸を巻取方向に回転
させ、ウエビングの弛みをリトラクタの巻取軸上に巻き
取って除去するものがある。かかるプリテンショナとし
て、特開平1−306345号公報に記載のものが知ら
れている。このものは、ガス発生器の作動により牽引さ
れる牽引ワイヤが数回挿巻されたドライブプーリと、ド
ライブプーリ内に一対の噛合爪が枢動自在に偏心して取
り付けられた緊張用回転駆動手段と、噛合爪に対向した
内歯を有しウエビング巻取軸と一体的に回転する噛合リ
ングとを備え、ガス発生器の作動によるドライブプーリ
の回転により、遠心力により噛合爪が枢動して噛合リン
グと噛合し、ウエビングの弛みを巻取軸に巻き取る構成
のものである。
Therefore, there is provided a pretensioner for a seat belt device that tightens the webbing to remove the slack in the event of a vehicle collision. Conventionally, this type of pretensioner operates a gas generator in an emergency, and this gas pressure causes the take-up shaft of the seat belt retractor to rotate in the take-up direction, so that the slack of the webbing is removed from the take-up shaft of the retractor. There is something to wind up and remove. As such a pretensioner, the one described in JP-A-1-306345 is known. This is a drive pulley in which a pulling wire pulled by the operation of a gas generator is wound several times, and a rotation drive means for tensioning in which a pair of meshing claws are eccentrically mounted rotatably in the drive pulley. , With a meshing ring having internal teeth facing the meshing claw and rotating integrally with the webbing take-up shaft, the meshing claw pivots and meshes with the centrifugal force by the rotation of the drive pulley due to the operation of the gas generator. It is configured to mesh with the ring and wind the looseness of the webbing around the winding shaft.

【0004】[0004]

【発明が解決しようとする課題】前記従来例において
は、ガス圧伝達機構が、牽引ワイヤによりドライブプー
リを回転させる構成のものであり、シリンダ内のピスト
ンに連結した牽引ワイヤを火薬による爆発力を利用して
引き出す方法を用いたものであった。そのため、ピスト
ンを収納するシリンダを設ける必要上、シリンダが寸法
的に大きなものとなっていた。また、牽引ワイヤには、
大きな引っ張り力を要するために、太く剛性の高いもの
が必要とされていた。更に、牽引ワイヤを挿巻するドラ
イブプーリも小径のものを使用することができず、所定
の引き込み量を確保するためには、火薬量の増大と共
に、装置の寸法も大きくなるという欠点を有していた。
In the above-mentioned conventional example, the gas pressure transmitting mechanism has a structure in which the drive pulley is rotated by the pulling wire, and the pulling wire connected to the piston in the cylinder is used to generate the explosive force by the explosive. It was a method of using and pulling out. Therefore, it is necessary to provide a cylinder for accommodating the piston, so that the cylinder is large in size. Also, the tow wire
Since a large pulling force is required, a thick and highly rigid one has been required. Furthermore, it is not possible to use a drive pulley having a small diameter for winding the pulling wire, and in order to secure a predetermined pull-in amount, there is a drawback that the size of the device increases as the amount of explosive increases. Was there.

【0005】また、緊張用回転駆動手段として、ドライ
ブプーリ内に枢動自在に偏心して取り付けた一対の噛合
爪を設け、いずれか一方の噛合爪が噛合リングと噛合す
るように構成して、緊急時だけ巻取軸と連結するクラッ
チ機構を設けてある。しかしながら、噛合爪と噛合リン
グとの同期設定が難しく、いずれか一方の噛合爪と噛合
リングとの噛合のタイミングが遅れたり、両方の噛合爪
とも噛合リングと噛合しなかったりするおそれがあっ
た。また、作動時の回転速度が非常に高いため、噛合爪
と噛合リングの歯先同士の衝突により、噛合爪が跳ね返
されて、噛合爪が噛合リングと噛合しなかったりするお
それもあった。
Further, a pair of engaging claws which are eccentrically mounted rotatably in the drive pulley are provided as the rotational drive means for tensioning, and one of the engaging claws is configured to mesh with the engaging ring for emergency operation. A clutch mechanism is provided to connect with the take-up shaft only when necessary. However, it is difficult to set synchronization between the meshing claw and the meshing ring, and there is a risk that the timing of meshing between any one of the meshing claws and the meshing ring may be delayed, or both meshing claws may not mesh with the meshing ring. Further, since the rotational speed during operation is very high, there is a possibility that the meshing claw may bounce back due to collision between the tooth tips of the meshing claw and the meshing ring, and the meshing claw may not mesh with the meshing ring.

【0006】本発明は、従来の技術の有するこのような
問題点に鑑みてなされたものであって、その目的とする
ところは、小型化が図られ、巻取軸と巻取軸の駆動手段
との同期を取る必要がなく、緊急時に充分な量のウエビ
ング巻き取りを行えるシートベルト装置のプリテンショ
ナを提供しようとするものである。
The present invention has been made in view of the above problems of the prior art. The object of the present invention is to reduce the size of the winding shaft and the driving means for the winding shaft. It is an object of the present invention to provide a pretensioner for a seat belt device that can wind up a sufficient amount of webbing in an emergency without the need to synchronize with.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
に、本発明におけるシートベルト装置のプリテンショナ
は、ウエビング巻取方向に回転付勢された巻取軸と、ガ
ス発生器から吐出されるガスの流入口を形成したケーシ
ングと、ケーシング内に配置されると共に巻取軸と一体
的に回転する回転体と、ケーシング内に配置されガス圧
により移動して回転体と係合する作動体とを備え、回転
体と作動体との間に変形部材を介在させ、ガス発生器の
作動により作動体を移動させ、変形部材と係合する回転
体が回転することにより、ウエビングを巻き取るように
してある。
In order to achieve the above object, a pretensioner for a seat belt device according to the present invention is discharged from a take-up shaft that is rotationally biased in a webbing take-up direction and a gas generator. A casing having a gas inlet, a rotating body arranged in the casing and rotating integrally with the winding shaft, and an operating body arranged in the casing and moved by gas pressure to engage with the rotating body. The deformable member is interposed between the rotating member and the actuating member, the actuating member is moved by the operation of the gas generator, and the rotating member engaging with the deforming member is rotated to wind the webbing. There is.

【0008】また、回転体と作動体との一方の係合面に
歯状突起を形成し、他方の係合面に変形部材を設けてあ
る。そして、変形部材が硬質樹脂又は金属材料から成
る。また、変形部材を中空円筒形状に形成してある。更
に、作動体に変形部材を設け、この作動体の下端部に変
形部材の端部と当接する係止突片を形成してある。ま
た、作動体の係合面と反対側の側部に凹欠部を形成し、
この凹欠部とケーシングの側面壁との間にローラを介在
させてある。更にまた、ケーシング及び作動体を回転体
側に湾曲する断面円弧形状に形成してある。
Further, a tooth-shaped projection is formed on one of the engaging surfaces of the rotating body and the operating body, and a deforming member is provided on the other engaging surface. The deformable member is made of hard resin or metal material. Further, the deformable member is formed in a hollow cylindrical shape. Furthermore, a deformable member is provided on the actuating body, and a locking projection that abuts against the end of the deformable member is formed at the lower end of the actuating body. In addition, a recessed portion is formed on the side opposite to the engaging surface of the actuation body,
A roller is interposed between the recess and the side wall of the casing. Furthermore, the casing and the operating body are formed in an arcuate cross-section that curves toward the rotating body.

【0009】[0009]

【作用】緊急時にガス発生器が作動すると、ガスがガス
流入口よりケーシング内に供給される。そして、このガ
ス圧により作動体がケーシング内を移動し、回転体と係
合する。作動体と回転体とは、その間に介在させた変形
部材が変形することによって、いかなる状態においても
確実に係合し、回転体が回転する。そして、回転体の回
転により、回転体と連結している巻取軸が回転し、ウエ
ビングを確実に引き締めることができる。
When the gas generator operates in an emergency, gas is supplied into the casing through the gas inlet. Then, due to this gas pressure, the operating body moves in the casing and engages with the rotating body. The actuating body and the rotating body are securely engaged in any state by the deformation of the deformable member interposed therebetween, and the rotating body rotates. The rotation of the rotating body causes the winding shaft connected to the rotating body to rotate, so that the webbing can be securely tightened.

【0010】そして、回転体と作動体との一方の係合面
に歯状突起を形成し、他方の係合面に硬質樹脂又は変形
可能な金属材料から成る変形部材を設けると、歯状突起
が変形部材に食い込むので、作動体と回転体とはより確
実に係合する。また、変形部材を中空円筒形状に形成す
ると、その中央部が回転体と近接しており、係合初期に
おいて小さな力で確実に係合すると共に、つぶれによる
変形部材の外部への張り出しを減少させることができ
る。更に、作動体に変形部材を設け、この作動体の下端
部に変形部材の端部と当接する係止突片を形成すると、
変形部材に働く剪断力は係止突片で受け止められる。こ
の係止突片が回転体と係合することにより作動体の移動
が停止し、作動体の飛び出しが防止できる。また、回転
体と作動体との係合により、作動体の係合面と反対側の
側部はケーシング側面壁に押しつけられるが、作動体の
該側部に凹欠部を形成し、この凹欠部とケーシングの側
面壁との間にローラを介在させると、作動体の摺動抵抗
を軽減させることができる。更にまた、ケーシング及び
作動体を回転体側に湾曲する断面円弧形状に形成する
と、装置全体の寸法を小さくすることができると共に、
回転力をより確実に伝達するための回転体との係合する
距離を大きくすることができる。
When a tooth-like projection is formed on one of the engaging surfaces of the rotating body and the operating body and a deforming member made of hard resin or a deformable metal material is provided on the other engaging surface, the tooth-like projection is formed. Bites into the deformable member, so that the actuating member and the rotating member are engaged more reliably. Further, when the deformable member is formed in a hollow cylindrical shape, the central portion thereof is close to the rotating body, so that the deformable member is reliably engaged with a small force in the initial stage of engagement, and the protrusion of the deformable member to the outside due to crushing is reduced. be able to. Furthermore, if a deformable member is provided on the actuating body and a locking projection that abuts against the end of the deformable member is formed on the lower end of the actuating body,
The shearing force acting on the deformable member is received by the locking projection. The movement of the actuating body is stopped by the engagement of the locking projection with the rotating body, so that the actuating body can be prevented from jumping out. Further, due to the engagement between the rotating body and the operating body, the side portion of the operating body opposite to the engaging surface is pressed against the side wall of the casing, but a concave cutout is formed in the side portion of the operating body. By interposing a roller between the cutout portion and the side wall of the casing, the sliding resistance of the operating body can be reduced. Furthermore, if the casing and the actuation body are formed in an arcuate cross-section that curves toward the rotating body, the overall size of the device can be reduced, and
It is possible to increase the distance of engagement with the rotating body for transmitting the rotational force more reliably.

【0011】[0011]

【実施例】実施例について図面を参照して説明する。図
1は本装置の内部の正面図、図2は本装置の要部の側面
断面図、図3は本装置の要部の分解斜視図、図4は本装
置内部における初期状態の正面図、図5はウエビング引
き締め完了時における本装置の内部の正面図である。
EXAMPLES Examples will be described with reference to the drawings. 1 is a front view of the inside of the device, FIG. 2 is a side sectional view of the main part of the device, FIG. 3 is an exploded perspective view of the main part of the device, and FIG. 4 is a front view of an initial state inside the device. FIG. 5 is a front view of the inside of the apparatus when the webbing tightening is completed.

【0012】10は、断面コ字状を呈するハウジングで
ある。ハウジング10は、車体に取り付ける背板11
と、相対向する両側板12,12とを有する。13は、
両側板12,12の中央部に回転可能に支持せしめられ
た、シートベルトのウエビング14を巻き取る巻取軸で
ある。この巻取軸13は、ウエビング14を外周に巻回
する方向に回転付勢されている。巻取軸13の一端部
は、角軸形状に形成してある。
Reference numeral 10 denotes a housing having a U-shaped cross section. The housing 10 is a back plate 11 attached to the vehicle body.
And both side plates 12 and 12 facing each other. 13 is
A winding shaft for rotatably supporting the webbing 14 of the seat belt, which is rotatably supported by the central portions of the side plates 12, 12. The winding shaft 13 is rotationally biased in a direction of winding the webbing 14 around the outer circumference. One end of the take-up shaft 13 is formed in a square shaft shape.

【0013】20は、ハウジング10に取り付けられる
ケーシングである。ケーシング20は、背面壁21と、
背面壁21の周縁部より立設形成した側面壁22と、ケ
ーシングカバー23とより成っている。背面壁21の中
央部には、透孔24を設けてある。また、背面壁21の
下端部には、ガス発生器30から吐出されるガスをケー
シング20内に流入させるため、ガス流入口25を形成
してある。ケーシング20の上端部の側面壁22には、
ガス抜きのために、ガス抜き孔26を形成してある。
Reference numeral 20 is a casing attached to the housing 10. The casing 20 includes a rear wall 21 and
It is composed of a side wall 22 formed upright from the peripheral edge of the back wall 21 and a casing cover 23. A through hole 24 is provided in the center of the back wall 21. A gas inlet 25 is formed at the lower end of the back wall 21 to allow the gas discharged from the gas generator 30 to flow into the casing 20. On the side wall 22 at the upper end of the casing 20,
A gas vent hole 26 is formed for venting gas.

【0014】40は、ケーシング20に回転可能に支持
される回転体である。回転体40は、その円柱状の基端
部41をケーシング20の透孔24に嵌入してある。そ
して、回転体40は、基端部41に設けた角孔(図示せ
ず)に角軸状に形成した巻取軸13の一端部を嵌入させ
ることにより巻取軸13に連結してあり、巻取軸13と
一体的に回転する。
Reference numeral 40 denotes a rotating body rotatably supported by the casing 20. The rotating body 40 has a cylindrical base end portion 41 fitted into the through hole 24 of the casing 20. The rotary body 40 is connected to the take-up shaft 13 by fitting one end of the take-up shaft 13 formed in an angular shaft shape into a square hole (not shown) provided in the base end part 41, It rotates integrally with the winding shaft 13.

【0015】回転体40の中央部はケーシング20内に
配置される部位であり、その外周には歯状突起42が形
成されている。また、回転体40の先端部43は円柱形
状に形成してあり、ケーシングカバー23に設けた透孔
27に嵌入してある。そして、ケーシングカバー23よ
り臨出する回転体40の先端部43には角軸部44を形
成してあり、この角軸部44は巻取軸13をウエビング
14巻取方向に回転付勢するゼンマイバネユニット15
に嵌合させてある。
The central portion of the rotating body 40 is a portion arranged inside the casing 20, and a tooth-like projection 42 is formed on the outer periphery thereof. Further, the tip end portion 43 of the rotating body 40 is formed in a columnar shape, and is fitted into the through hole 27 provided in the casing cover 23. An angular shaft portion 44 is formed at the tip end portion 43 of the rotating body 40 protruding from the casing cover 23. The angular shaft portion 44 urges the winding shaft 13 to rotate in the winding direction of the webbing 14 to rotate the spring. Unit 15
Is fitted to.

【0016】50は、ケーシング20内に配置され、ガ
ス圧により移動して回転体40と係合する作動体であ
る。51は、回転体40との係合面と反対側の作動体5
0の一側部に形成した凹欠部である。この凹欠部51の
一側面とケーシング20の中央部の側面壁22に形成し
た止突起28との間には、ガス発生器30の作動により
作動体50を円滑に移動させるために、複数個のローラ
52を配設してある。
Reference numeral 50 denotes an actuating member which is arranged in the casing 20 and which moves by gas pressure and engages with the rotating member 40. 51 is an actuation body 5 on the side opposite to the engaging surface with the rotating body 40.
0 is a concave cutout formed on one side. Between the one side surface of the recessed portion 51 and the stop projection 28 formed on the side wall 22 at the center of the casing 20, a plurality of actuating bodies 50 are smoothly moved by the operation of the gas generator 30. Rollers 52 are provided.

【0017】回転体40と作動体50との間には、変形
部材を介在させてある。本実施例においては、凹欠部5
1と反対側の作動体50の一側部(回転体40との係合
面)に、容易に変形しないウレタン、エラストマー等の
硬質樹脂より成る変形部材53を固着してある。この変
形部材53に用いる硬質樹脂は、ショアーA硬度70以
上のものが好ましく、より好ましくは85以上である。
A deformable member is interposed between the rotating body 40 and the operating body 50. In this embodiment, the recessed portion 5
A deformable member 53 made of a hard resin such as urethane or elastomer that is not easily deformed is fixed to one side portion (engaging surface with the rotating body 40) of the actuation body 50 on the side opposite to 1. The hard resin used for the deformable member 53 preferably has a Shore A hardness of 70 or more, and more preferably 85 or more.

【0018】54は、変形部材53を剥がれにくくする
ために、作動体50の一側部に形成した突起である。こ
の突起54は、変形部材53により、歯先が見えないよ
うに埋没している。尚、作動体50及び変形部材53の
幅は、ケーシング20の側面壁22間の幅より若干小さ
く形成すればよい。
Reference numeral 54 is a protrusion formed on one side of the actuation body 50 in order to prevent the deformable member 53 from coming off easily. The protrusion 54 is buried by the deformable member 53 so that the tooth tips cannot be seen. The width of the actuation body 50 and the deformable member 53 may be formed to be slightly smaller than the width between the side wall 22 of the casing 20.

【0019】そして、図1及び図4に示すように、初期
状態において、作動体50は、回転体40と係合しない
位置に配設してある。作動体50と回転体40とが係合
しやすくするように、作動体50及び変形部材53の先
端部は傾斜して形成すると、係合時に係合が徐々に増加
して行くので好ましい。
Then, as shown in FIGS. 1 and 4, in the initial state, the operating body 50 is disposed at a position where it does not engage with the rotating body 40. It is preferable that the distal end portions of the actuation body 50 and the deformable member 53 are formed to be inclined so that the actuation body 50 and the rotating body 40 can be easily engaged with each other, since the engagement gradually increases at the time of engagement.

【0020】ガス発生器30が作動すると、図5に示す
ように、ガス流入口25より流入するガスの圧力によ
り、破線の位置から実線の位置へ作動体50が移動す
る。このとき、変形部材53が回転体40の歯状突起4
2と係合して変形しつつ回転体40を回転させる。その
結果、回転体40と連結した巻取軸13が回転し、ウエ
ビング14が引き締められることとなる。この間、作動
体50は、回転体40により側面壁22に押しつけられ
るが、ローラ52が介在しているので、円滑に移動する
ことができる。
When the gas generator 30 is operated, as shown in FIG. 5, the pressure of the gas flowing in from the gas inlet 25 moves the actuation body 50 from the position indicated by the broken line to the position indicated by the solid line. At this time, the deformable member 53 causes the tooth-shaped projections 4 of the rotating body 40 to move.
The rotary body 40 is rotated while engaging with 2 and deforming. As a result, the winding shaft 13 connected to the rotating body 40 rotates, and the webbing 14 is tightened. During this time, the operating body 50 is pressed against the side wall 22 by the rotating body 40, but can smoothly move because the roller 52 is interposed.

【0021】上記実施例においては、回転体40に歯状
突起42を形成したが、作動体50に固着した変形部材
53との間で充分な摩擦力が得られれば、歯状突起42
を形成しなくてもよい。また、上記実施例において、作
動体50に変形部材53を固着したものを例示したが、
作動体50に変形部材53を固着せず、回転体40に変
形部材を固着したものであってもよい。また、回転体4
0と作動体50の両者に変形部材を固着したものであっ
てもよい。更に、回転体40や作動体50自体を変形部
材で形成してもよい。
In the above embodiment, the tooth-like protrusions 42 are formed on the rotating body 40, but if sufficient frictional force can be obtained between the rotating member 40 and the deformable member 53 fixed to the actuating body 50, the tooth-like protrusions 42 can be formed.
Need not be formed. Further, in the above embodiment, the one in which the deformable member 53 is fixed to the actuation body 50 is illustrated, but
Instead of fixing the deformable member 53 to the actuation body 50, the deformable member may be fixed to the rotating body 40. Also, the rotating body 4
The deformable member may be fixed to both 0 and the actuation body 50. Further, the rotating body 40 and the actuating body 50 themselves may be formed of a deformable member.

【0022】次に、本発明に係る第2実施例について図
面を参照して説明する。図6は第2実施例の分解斜視
図、図7は他の実施例の作動体の正面図、図8は初期状
態における第2実施例要部の断面図、図9はウエビング
引き締め完了時における第2実施例要部の断面図であ
る。ハウジング10、ガス発生器30、及び回転体40
は、第1実施例と同様に構成すればよい。
Next, a second embodiment according to the present invention will be described with reference to the drawings. 6 is an exploded perspective view of the second embodiment, FIG. 7 is a front view of an actuation body of another embodiment, FIG. 8 is a cross-sectional view of an essential part of the second embodiment in an initial state, and FIG. 9 is a completed webbing tightening operation. It is sectional drawing of the 2nd Example principal part. Housing 10, gas generator 30, and rotating body 40
May be configured similarly to the first embodiment.

【0023】ハウジング10に取り付けられるケーシン
グ200は、背面壁201と、側面壁202と、ケーシ
ングカバー203とより成っている。背面壁201及び
ケーシングカバー203の中央部には、夫々透孔20
4,207を設けてある。また、背面壁201の下端部
には、ガス発生器30から吐出されるガスをケーシング
200内に流入させるため、ガス流入口205を形成し
てある。
The casing 200 attached to the housing 10 comprises a rear wall 201, a side wall 202 and a casing cover 203. The rear wall 201 and the casing cover 203 have through-holes 20 at the center.
4,207 are provided. A gas inlet 205 is formed at the lower end of the back wall 201 to allow the gas discharged from the gas generator 30 to flow into the casing 200.

【0024】回転体40は、その基端部41を透孔20
4に、その先端部43を透孔207に夫々嵌入してあ
り、ケーシング200に回転可能に支持されている。そ
して、回転体40は、その基端部41を巻取軸13に連
結すると共に、先端部43に形成した角軸部44をゼン
マイバネユニット15に嵌合させてあり、巻取軸13と
一体的に回転する。
The rotating body 40 has a base end portion 41 at the through hole 20.
4, the tip end portions 43 are fitted into the through holes 207, respectively, and are rotatably supported by the casing 200. The rotary body 40 has a base end portion 41 connected to the winding shaft 13 and an angular shaft portion 44 formed on the tip end portion 43 fitted to the mainspring spring unit 15, and is integrated with the winding shaft 13. Rotate to.

【0025】ケーシング200内に配置される作動体5
00には、回転体40との係合面側に、縦方向に凹溝5
05を形成してある。また、作動体500の下端部に
は、気密性を確保するために、凹溝505側に係止突片
506を突出形成してある。
Actuator 5 arranged in casing 200
00, the concave groove 5 is formed in the longitudinal direction on the side of the engaging surface with the rotating body 40.
05 is formed. Further, at the lower end of the actuation body 500, a locking projection 506 is formed to project on the side of the groove 505 in order to ensure airtightness.

【0026】凹溝505には、回転体40の歯状突起4
2と係合する変形部材503を係止してある。変形部材
503の下端部は、係止突片506に当接して支持され
ている。変形部材503は、歯状突起42との係合に応
じて変形して噛合するものであり、硬質樹脂、又は銅、
アルミニウム、鉛等の変形可能な金属材料等の素材より
作製してある。
In the groove 505, the tooth-like projections 4 of the rotating body 40 are formed.
The deformable member 503 that engages with 2 is locked. The lower end of the deformable member 503 is in contact with and supported by the locking projection 506. The deformable member 503 deforms and meshes in accordance with the engagement with the tooth-like protrusion 42, and is made of hard resin, copper, or
It is made of a deformable metal material such as aluminum or lead.

【0027】この変形部材503は、中空円筒形状に形
成すると、係合時に歯状突起42と接触する面積が徐々
に大きくなり、好ましい。また、変形部材503の先端
部に傾斜部507を形成すると、回転体40と係合しや
すくなると共に、係合時に係合が徐々に増加して行くの
で好ましい。
When the deforming member 503 is formed in a hollow cylindrical shape, the area of contact with the tooth-like projection 42 at the time of engagement is gradually increased, which is preferable. Further, it is preferable to form the inclined portion 507 at the tip of the deformable member 503, because it facilitates engagement with the rotating body 40 and gradually increases engagement during engagement.

【0028】また、図7に示すように、作動体500
は、回転体40との係合側部及びその内部に、蜂の巣状
凹部508を形成したものであってもよい。このように
作動体500を形成すると、歯状突起42との係合に応
じて作動体500も変形して噛合することとなる。この
場合には、作動体500が変形部材として作用する。
Further, as shown in FIG.
May have a honeycomb-shaped concave portion 508 formed on the engaging side portion with the rotating body 40 and inside thereof. When the actuation body 500 is formed in this manner, the actuation body 500 is also deformed and meshed in accordance with the engagement with the tooth-like protrusion 42. In this case, the actuation body 500 acts as a deforming member.

【0029】ガス発生器30が作動すると、図9に示す
ように、ガス流入口205より流入するガスの圧力によ
り、作動体500及び変形部材503が移動する。この
とき、変形部材503が回転体40の歯状突起42と係
合して変形しつつ回転体40を回転させる。その結果、
回転体40と連結した巻取軸13が回転し、ウエビング
14が引き締められることとなる。また、作動体500
の下端部の係止突片506は、回転体40と係合して作
動体500の移動を停止させる。
When the gas generator 30 operates, the actuation body 500 and the deformable member 503 move due to the pressure of the gas flowing from the gas inlet 205, as shown in FIG. At this time, the deformable member 503 engages with the tooth-shaped projections 42 of the rotating body 40 to deform and rotate the rotating body 40. as a result,
The winding shaft 13 connected to the rotating body 40 rotates, and the webbing 14 is tightened. In addition, the operating body 500
The locking projection 506 at the lower end of the engaging member engages with the rotating body 40 and stops the movement of the actuating body 500.

【0030】次に、本発明に係る第3実施例について図
面を参照して説明する。図10は初期状態における第3
実施例要部の断面図、図11はウエビング引き締め完了
時における第3実施例要部の断面図である。第3実施例
は、ケーシング210、作動体510、及び変形部材5
13を、断面円弧形状とした以外は、第2実施例と同様
に構成してある。
Next, a third embodiment according to the present invention will be described with reference to the drawings. FIG. 10 shows the third state in the initial state.
FIG. 11 is a sectional view of an essential part of the embodiment, and FIG. 11 is a sectional view of an essential part of the third embodiment when the webbing tightening is completed. In the third embodiment, the casing 210, the actuator 510, and the deformable member 5 are used.
The structure is the same as that of the second embodiment except that 13 has an arcuate cross section.

【0031】即ち、ケーシング210は、背面壁211
と、回転体40側に円弧形状に湾曲させた側面壁212
と、ケーシングカバー(図示略)とより成っている。背
面壁211及びケーシングカバーの中央部には、夫々透
孔(図示略)を設けてある。また、背面壁211の下端
部には、ガス発生器30から吐出されるガスをケーシン
グ210内に流入させるため、ガス流入口215を形成
してある。
That is, the casing 210 has a rear wall 211.
And a side wall 212 curved in an arc shape toward the rotating body 40.
And a casing cover (not shown). Through holes (not shown) are provided in the central portions of the back wall 211 and the casing cover, respectively. A gas inlet 215 is formed at the lower end of the back wall 211 to allow the gas discharged from the gas generator 30 to flow into the casing 210.

【0032】回転体40は、その基端部41を透孔21
4に、その先端部をケーシングカバーの透孔に夫々嵌入
してあり、ケーシング210に回転可能に支持されてい
る。そして、回転体40は、その基端部を巻取軸13に
連結すると共に、先端部43に形成した角軸部をゼンマ
イバネユニット15に嵌合させてあり、巻取軸13と一
体的に回転する。
The rotating body 40 has a base end portion 41 at the through hole 21.
4, the front end portions are fitted into the through holes of the casing cover, and are rotatably supported by the casing 210. The rotating body 40 has a base end portion connected to the winding shaft 13 and an angular shaft portion formed at the tip end portion 43 fitted into the mainspring spring unit 15 so as to rotate integrally with the winding shaft 13. To do.

【0033】ケーシング210内に配設される作動体5
10は、側面壁212の曲率と同じに円弧形状に回転体
40側に湾曲させて形成してある。そして、作動体51
0には、回転体40との係合面側に、縦方向に凹溝51
5を形成してある。また、作動体510の下端部には、
気密性を確保するために、凹溝515側に係止突片51
6を突出形成してある。
Actuator 5 disposed in casing 210
Reference numeral 10 is formed by curving toward the rotating body 40 side in an arc shape similar to the curvature of the side wall 212. And the operating body 51
0 is a concave groove 51 in the longitudinal direction on the engagement surface side with the rotating body 40.
5 is formed. In addition, at the lower end of the actuator 510,
In order to ensure airtightness, the locking projection 51 is provided on the concave groove 515 side.
6 is formed to project.

【0034】凹溝515には、回転体40の歯状突起4
2と係合する変形部材513を係止してある。変形部材
513も、側面壁212の曲率と同じに円弧形状に回転
体40側に湾曲させて形成してある。そして、変形部材
513の下端部は、係止突片516に当接して支持され
ている。
In the concave groove 515, the tooth-like projections 4 of the rotating body 40 are provided.
The deformable member 513 that engages with 2 is locked. The deforming member 513 is also formed by curving toward the rotating body 40 side in an arc shape similar to the curvature of the side wall 212. The lower end of the deformable member 513 is supported by abutting the locking projection 516.

【0035】変形部材513は、硬質樹脂、又は銅、ア
ルミニウム、鉛等の変形可能な金属材料等の素材より作
製してある。そして、変形部材513は、中空円筒形状
に形成すると、係合時に歯状突起42と接触する面積が
徐々に大きくなり、好ましい。また、変形部材513の
先端部に傾斜部517を形成すると、回転体40と係合
しやすくなると共に、係合時に係合が徐々に増加して行
くので好ましい。
The deformable member 513 is made of a material such as a hard resin or a deformable metal material such as copper, aluminum or lead. When the deformable member 513 is formed in a hollow cylindrical shape, the area of contact with the tooth-like protrusions 42 at the time of engagement is gradually increased, which is preferable. Further, it is preferable to form the inclined portion 517 at the tip end of the deformable member 513, because it facilitates the engagement with the rotating body 40 and the engagement gradually increases during the engagement.

【0036】ガス発生器30が作動すると、図11に示
すように、ガス流入口215より流入するガスの圧力に
より、作動体510及び変形部材513が移動する。こ
のとき、変形部材513が回転体40の歯状突起42と
係合して変形しつつ回転体40を回転させる。変形部材
513は円弧形状に湾曲させて形成してあるので、回転
体40との係合する距離が増加し、また、第2実施例と
同じ接触距離にすると装置自体を小型化することができ
る。変形部材513と回転体40との係合により、回転
体40と連結した巻取軸13が回転し、ウエビング14
が引き締められることとなる。
When the gas generator 30 operates, as shown in FIG. 11, the actuation body 510 and the deformable member 513 move due to the pressure of the gas flowing from the gas inlet 215. At this time, the deformable member 513 engages with the tooth-shaped projections 42 of the rotating body 40 to deform and rotate the rotating body 40. Since the deformable member 513 is curved and formed in an arc shape, the engaging distance with the rotating body 40 increases, and if the contact distance is the same as in the second embodiment, the device itself can be downsized. . Due to the engagement of the deformable member 513 and the rotating body 40, the winding shaft 13 connected to the rotating body 40 rotates, and the webbing 14
Will be tightened.

【0037】かくして、本発明においては、ギアとギア
との噛合によることなくウエビング巻き取りを行えるの
で、同期設定や噛合のタイミングを考慮することなく、
シートベルト装置のプリテンショナを簡単に製造するこ
とができる。尚、ウエビング14の巻き締め後は、公知
のELR(緊急ロックリトラクタ)やALR(自動ロッ
クリトラクタ)のロック機構により、ウエビング12の
引き出しを阻止すればよい。
Thus, in the present invention, since the webbing can be wound without depending on the meshing of gears, the synchronization setting and the meshing timing are not taken into consideration,
The pretensioner of the seat belt device can be easily manufactured. After the webbing 14 is tightened, the webbing 12 may be prevented from being pulled out by a known ELR (emergency lock retractor) or ALR (automatic lock retractor) locking mechanism.

【0038】[0038]

【発明の効果】本発明は、上述のとおり構成されてお
り、回転体と作動体との係合部に変形部材を介在させる
ことにより、変形部材が回転体の形状に応じて変形する
ので、いかなる状態においても確実な係合を確保するこ
とができる。また、回転体と作動体との一方の係合面に
歯状突起を形成し、他方の係合面に変形部材を設ける
と、歯状突起が変形部材に食い込んで、作動体と回転体
とをより確実に係合させることができる。そして、作動
体と回転体とのいずれか一方の係合面に変形部材として
硬質樹脂又は金属材料を固着すると、これらの材料が変
形しながら係合するので、作動体と回転体とはいかなる
状態においても係合を確実に行うことができ、ウエビン
グを確実に引き締めることができる。また、変形部材を
中空円筒形状に形成すると、その中央部が回転体と近接
しており、係合初期において小さな力で確実に係合する
と共に、つぶれによる変形部材の外部への張り出しを減
少させることができる。更に、作動体に変形部材を設
け、この作動体の下端部に変形部材の端部と当接する係
止突片を形成すると、変形部材に働く剪断力は係止突片
で受け止められる。また、この係止突片が回転体と係合
することにより作動体の移動が停止し、作動体の飛び出
しが防止できる。また、回転体との係合面と反対側の作
動体の側部とケーシングの側面壁との間にローラを介在
させることにより、作動体の摺動抵抗を軽減させること
ができる。更にまた、ケーシング及び作動体を回転体側
に湾曲する断面円弧形状に形成すると、装置全体の寸法
を小さくすることができると共に、回転力をより確実に
伝達するための回転体との係合する距離を大きくするこ
とができる。
The present invention is configured as described above, and the deforming member is deformed according to the shape of the rotating body by interposing the deforming member in the engaging portion between the rotating body and the actuating body. It is possible to ensure reliable engagement in any state. Further, when the tooth-like projection is formed on one of the engaging surfaces of the rotating body and the operating body and the deforming member is provided on the other engaging surface, the tooth-like projection bites into the deforming member, and the operating body and the rotating body Can be engaged more reliably. When a hard resin or a metal material is fixed as a deformable member to the engagement surface of either one of the operating body and the rotating body, these materials deform and engage with each other. Also in this case, the engagement can be surely performed, and the webbing can be surely tightened. Further, when the deformable member is formed in a hollow cylindrical shape, the central portion thereof is close to the rotating body, so that the deformable member is reliably engaged with a small force in the initial stage of engagement, and the protrusion of the deformable member to the outside due to crushing is reduced. be able to. Further, when a deformable member is provided on the actuating body and a locking projection that abuts against the end of the deforming member is formed at the lower end of the actuating body, the shearing force acting on the deforming member is received by the locking projection. Further, the movement of the actuating body is stopped by the engagement of the locking projection with the rotating body, so that the actuating body can be prevented from jumping out. Further, by interposing the roller between the side portion of the operating body on the side opposite to the engagement surface with the rotating body and the side wall of the casing, the sliding resistance of the operating body can be reduced. Furthermore, if the casing and the actuating body are formed in an arcuate cross-section that curves toward the rotating body, the overall size of the device can be reduced, and the distance with which the rotating body is engaged for more reliable transmission of rotational force. Can be increased.

【0039】このように、本発明によれば、作動体と回
転体との係合はギアとギアとの噛合によらないので、同
期設定や噛合のタイミングを考慮することなく、シート
ベルト装置のプリテンショナを簡単に製造することがで
きる。
As described above, according to the present invention, the engagement between the actuating member and the rotating member does not depend on the meshing of the gears. Therefore, the seat belt device can be operated without considering the synchronization setting or the meshing timing. The pretensioner can be easily manufactured.

【図面の簡単な説明】[Brief description of drawings]

【図1】本装置の内部の正面図である。FIG. 1 is a front view of the inside of the apparatus.

【図2】本装置の要部の側面断面図である。FIG. 2 is a side sectional view of a main part of the apparatus.

【図3】本装置の要部の分解斜視図である。FIG. 3 is an exploded perspective view of a main part of the apparatus.

【図4】本装置内部における初期状態の正面図である。FIG. 4 is a front view of an initial state inside the device.

【図5】ウエビング引き締め完了時における本装置の内
部の正面図である。
FIG. 5 is a front view of the inside of the apparatus when the webbing tightening is completed.

【図6】第2実施例の分解斜視図である。FIG. 6 is an exploded perspective view of the second embodiment.

【図7】他の実施例の作動体の正面図である。FIG. 7 is a front view of an actuator according to another embodiment.

【図8】初期状態における第2実施例要部の断面図であ
る。
FIG. 8 is a sectional view of an essential part of a second embodiment in an initial state.

【図9】ウエビング引き締め完了時における第2実施例
要部の断面図である。
FIG. 9 is a cross-sectional view of the essential parts of the second embodiment upon completion of webbing tightening.

【図10】初期状態における第3実施例要部の断面図で
ある。
FIG. 10 is a sectional view of an essential part of the third embodiment in the initial state.

【図11】ウエビング引き締め完了時における第3実施
例要部の断面図である。
FIG. 11 is a cross-sectional view of the essential parts of the third embodiment upon completion of webbing tightening.

【符号の説明】[Explanation of symbols]

13 巻取軸 14 ウエビング 20、200、210 ケーシング 22、202、212 ケーシング側面壁 25、205、215 ガス流入口 30 ガス発生器 40 回転体 42 歯状突起 50、500、510 作動体 51 凹欠部 52 ローラ 53、503、513 変形部材 506、516 係止突片 13 Winding shaft 14 Webbing 20, 200, 210 Casing 22, 202, 212 Casing side wall 25, 205, 215 Gas inlet 30 Gas generator 40 Rotating body 42 Teeth 50, 500, 510 Actuator 51 Recessed portion 52 rollers 53, 503, 513 deforming members 506, 516 locking protrusions

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 ウエビング巻取方向に回転付勢された巻
取軸と、ガス発生器から吐出されるガスの流入口を形成
したケーシングと、ケーシング内に配置されると共に巻
取軸と一体的に回転する回転体と、ケーシング内に配置
されガス圧により移動して回転体と係合する作動体とを
備え、回転体と作動体との間に変形部材を介在させ、ガ
ス発生器の作動により作動体を移動させ、変形部材と係
合する回転体が回転することにより、ウエビングを巻き
取るようにしたことを特徴とするシートベルト装置のプ
リテンショナ。
1. A take-up shaft that is urged to rotate in the webbing take-up direction, a casing that forms an inflow port for gas discharged from a gas generator, and is disposed inside the casing and is integral with the take-up shaft. The rotating body that rotates around and the operating body that is arranged in the casing and moves by gas pressure to engage with the rotating body. The deformable member is interposed between the rotating body and the operating body to operate the gas generator. A pretensioner for a seat belt device, wherein the actuating member is moved by the rotating member and the rotating member that engages with the deformable member is rotated to wind up the webbing.
【請求項2】 回転体と作動体との一方の係合面に歯状
突起を形成し、他方の係合面に変形部材を設けたことを
特徴とする請求項1記載のシートベルト装置のプリテン
ショナ。
2. The seat belt device according to claim 1, wherein a tooth-shaped projection is formed on one of the engaging surfaces of the rotating body and the actuating body, and a deforming member is provided on the other engaging surface. Pretensioner.
【請求項3】 変形部材が硬質樹脂又は金属材料から成
ることを特徴とする請求項1又は2記載のシートベルト
装置のプリテンショナ。
3. The pretensioner for a seat belt device according to claim 1, wherein the deformable member is made of a hard resin or a metal material.
【請求項4】 変形部材を中空円筒形状に形成したこと
を特徴とする請求項2又は3記載のシートベルト装置の
プリテンショナ。
4. The pretensioner for a seat belt device according to claim 2, wherein the deformable member is formed in a hollow cylindrical shape.
【請求項5】 作動体に変形部材を設け、この作動体の
下端部に変形部材の端部と当接する係止突片を形成した
ことを特徴とする請求項1、2、3又は4記載のシート
ベルト装置のプリテンショナ。
5. The deformable member is provided on the actuating body, and a locking projection is formed at the lower end of the actuating body so as to abut the end of the deformable member. Seat belt device pretensioner.
【請求項6】 作動体の係合面と反対側の側部に凹欠部
を形成し、この凹欠部とケーシングの側面壁との間にロ
ーラを介在させたことを特徴とする請求項1、2、3、
4又は5記載のシートベルト装置のプリテンショナ。
6. A concave cutout is formed on a side portion of the actuation body opposite to the engagement surface, and a roller is interposed between the concave cutout and a side wall of the casing. 1, 2, 3,
A pretensioner for a seat belt device according to item 4 or 5.
【請求項7】 ケーシング及び作動体を回転体側に湾曲
する断面円弧形状に形成したことを特徴とする請求項
1、2、3、4、5又は6記載のシートベルト装置のプ
リテンショナ。
7. The pretensioner for a seat belt device according to claim 1, wherein the casing and the actuation body are formed in an arcuate cross-section that curves toward the rotary body.
JP18638795A 1994-11-14 1995-06-28 Pretensioner for seat belt device Expired - Fee Related JP3617859B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18638795A JP3617859B2 (en) 1994-11-14 1995-06-28 Pretensioner for seat belt device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP6-305611 1994-11-14
JP30561194 1994-11-14
JP18638795A JP3617859B2 (en) 1994-11-14 1995-06-28 Pretensioner for seat belt device

Publications (2)

Publication Number Publication Date
JPH08192722A true JPH08192722A (en) 1996-07-30
JP3617859B2 JP3617859B2 (en) 2005-02-09

Family

ID=26503735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18638795A Expired - Fee Related JP3617859B2 (en) 1994-11-14 1995-06-28 Pretensioner for seat belt device

Country Status (1)

Country Link
JP (1) JP3617859B2 (en)

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WO2006052020A1 (en) * 2004-11-11 2006-05-18 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Webbing retractor
JP2010076682A (en) * 2008-09-26 2010-04-08 Tokai Rika Co Ltd Webbing rolling-up device
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DE102006031359B4 (en) 2006-04-03 2019-08-14 Trw Automotive Gmbh Belt tensioner for a safety belt system
DE102021112446A1 (en) 2020-05-26 2021-12-02 Illinois Tool Works Inc. Force transmission element for a device for belt tensioning and a device for belt tensioning with such a force transmission element
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Cited By (12)

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Publication number Priority date Publication date Assignee Title
WO2006052020A1 (en) * 2004-11-11 2006-05-18 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Webbing retractor
JP2006137290A (en) * 2004-11-11 2006-06-01 Tokai Rika Co Ltd Webbing take-up device
CN100358755C (en) * 2004-11-11 2008-01-02 株式会社东海理化电机制作所 Webbing retractor
DE102006031359B4 (en) 2006-04-03 2019-08-14 Trw Automotive Gmbh Belt tensioner for a safety belt system
JP2010076682A (en) * 2008-09-26 2010-04-08 Tokai Rika Co Ltd Webbing rolling-up device
CN103978949A (en) * 2013-02-08 2014-08-13 株式会社东海理化电机制作所 Webbing take-up device
JP2014151795A (en) * 2013-02-08 2014-08-25 Tokai Rika Co Ltd Webbing winder
CN103978949B (en) * 2013-02-08 2017-06-13 株式会社东海理化电机制作所 Webbing take-up device
KR101718691B1 (en) * 2015-10-27 2017-03-22 아우토리브 디벨롭먼트 아베 Pretensioner
US11975682B2 (en) 2018-11-09 2024-05-07 Joyson Safety Systems Japan G.K. Power transmission member, pretensioner, retractor, and method for manufacturing power transmission member
DE102021112446A1 (en) 2020-05-26 2021-12-02 Illinois Tool Works Inc. Force transmission element for a device for belt tensioning and a device for belt tensioning with such a force transmission element
US11833995B2 (en) 2020-05-26 2023-12-05 Illinois Tool Works Inc. Force transmission element for a device for belt tensioning and a device for belt tensioning with such a force transmission element

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