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Seatbelt retractor

A technology for seat belts and retractors, applied in belt tensioners, seat belts in cars, belt fixing devices, etc., can solve problems such as changes in acceleration detection sensitivity, delay the start timing of locking, increase the pulling amount, reduce the The effect of pressure

Active Publication Date: 2019-11-19
AUTOLIV DEV AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of acceleration sensor, for example, when a strong braking force acts on the vehicle, the acceleration sensor rotates relative to the seat belt device, so that the acceleration detection sensitivity of the acceleration sensor changes

Method used

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  • Seatbelt retractor
  • Seatbelt retractor
  • Seatbelt retractor

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0042] Hereinafter, the seat belt retractor according to Embodiment 1 of the present invention will be described in detail with reference to the drawings.

[0043] The seat belt retractor 10 according to the present embodiment is mounted on a seat back of a reclining seat (not shown), and can be tilted together with the seat back in the vehicle front-rear direction, that is, can be tilted.

[0044] Such as figure 1 As shown, the retractor 10 for a seat belt includes: a metal mandrel 20 made of aluminum alloy, for example, on which a seat belt not shown is wound; U-shaped frame 11; arranged on the outside of one side plate 11a of the frame 11, a locking mechanism 40 that mechanically locks the pull-out action of the seat belt; a sensor mechanism 60 equipped with an acceleration sensor 70; arranged on the other side of the frame 11 On the outer side of one side plate 11b, there is a spring type winding device 30 that urges and rotates the mandrel 20 in the winding direction of ...

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PUM

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Abstract

Provided is a seatbelt retractor configured to ease the tightness of a seatbelt felt by an occupant when the occupant wearing the seatbelt reclines. An acceleration sensor (70) includes a sensor cover(71) which tilts together with a seatback, a sensor housing (72) supported swingably with respect to the sensor cover (71) and having an inertial body support surface (78) which supports an inertialbody (73), the inertial body (73) which is displaced from a neutral position when the acceleration reaches at least a prescribed value, and actuating members (74 and 75) which operate synchronously with the movement of the inertial body (73) to actuate the locking mechanism (40) to a locking side. The sensor housing (72) includes an external teeth part (84) having a plurality of external teeth (81) and (82) and a gap part (83) without the external teeth (81 and 82). The retractor further includes a lever member (90) coupled to the shaft (22) of the spindle (20) by friction coupling, and the lever member turns in a first direction in which an engagement part (92) is engaged with the external teeth part (84) when the spindle (20) rotates in a seatbelt drawing-out direction and turns in a second direction in which the engagement part (92) moves apart from the external teeth part (84) when the spindle (20) rotates in a seatbelt winding-up direction.

Description

technical field [0001] The invention relates to a retractor for a seat belt, and more specifically relates to a retractor for a seat belt installed on a seat back of a reclining seat. Background technique [0002] A seat belt device mounted on a vehicle uses the seat belt pulled out from the seat belt retractor inside the seat back to restrain the occupant seated on the seat, so that in the event of a vehicle collision, etc. A device to protect the occupant in case of emergency. The seat belt retractor generates an acceleration greater than the specified value in the horizontal direction when the vehicle collides. The acceleration sensor detects this acceleration and activates the seat belt locking mechanism. The seat belt cannot be pulled out. As an inertial body used for an acceleration sensor, an inertial body using a ball and an inertial body using a separate inertial body are known. [0003] If a seat belt retractor equipped with such an acceleration sensor is instal...

Claims

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Application Information

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IPC IPC(8): B60R22/26B60R22/34
CPCB60R22/26B60R22/34B60R22/40B60R2022/402B60R22/48B60R2022/4808
Inventor 新屋祐介日端岩太
Owner AUTOLIV DEV AB