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Seat belt retractor and seat belt apparatus

A technology for seat belt retractors and seat belts, applied in the directions of seat belts, belt retractors, transportation and packaging, etc., can solve the problems of additional EA mechanism, etc., to simplify the structure and simplify the retraction of seat belts device, the effect of reducing the number of parts

Inactive Publication Date: 2010-10-06
TAKATA CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the seat belt retractor driven by a motor preferably has an EA mechanism, it is difficult to simply add an EA mechanism.

Method used

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  • Seat belt retractor and seat belt apparatus
  • Seat belt retractor and seat belt apparatus
  • Seat belt retractor and seat belt apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Next, preferred modes for implementing the present invention will be described with reference to the drawings.

[0038] figure 1 It is a figure which schematically shows an example of embodiment of the seat belt apparatus provided with the seat belt retractor of this invention.

[0039] like figure 1 As shown, the seat belt device 1 of this example is composed of the following components: a seat belt retractor 3, which is fixed on the B-pillar 2 of the vehicle body and driven by a motor; The seat belt retractor 3 is pulled out, and the safety belt holder 4 at the front end is fixed on the floor of the vehicle body or the vehicle seat 5; The shoulder of the occupant C guides the seat belt 6 pulled out from the seat belt retractor 3; the tongue 8 is freely slidably supported on the seat belt 6 guided by the guide fixer 7; Buckle 9, fixed to the floor of the vehicle body or the vehicle seat, and inserted into the buckle tongue 8; electronic control unit (ECU) 10, for co...

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PUM

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Abstract

Provided is a motor-driven seat belt retractor which can be formed to have an entire compact size and can absorb impact energy on an occupant in the event of an emergency such as a vehicle collision. An electric motor (22) is disposed inside a cylindrical spool (18). The rotation of the electric motor (22) is transmitted to a spool (18) via a sun gear (31), planetary gears (33) and a carrier (32). In the event of an emergency, a locking mechanism (37) is actuated by the action of a deceleration sensing means (36) to lock the rotation of a locking base (38) in the belt unwinding direction. On the other hand, the spool (18) is about to continue to rotate in the belt unwinding direction by further inertia movement of an occupant so that a head (34a) of a torsion bar (34) of an EA mechanism is biased to rotate in the same direction via a carrier (32). Then, the torsion bar (34) is torsionally deformed, thereby absorbing impact energy on an occupant and limiting load on a seat belt 6 not to be too large.

Description

technical field [0001] The present invention relates to the technical field of a seat belt retractor mounted on a vehicle such as an automobile, and a seat belt retractor for constraining and protecting occupants by means of a motor to wind and pull out a seat belt device and a seat belt device having the retractor , especially in an emergency situation where a greater deceleration is applied to the vehicle, such as when the vehicle collides with the normal situation, the impact applied to the occupant is absorbed by the energy absorbing mechanism (hereinafter also referred to as the EA mechanism: also constituting the load limiting mechanism) Energy, limiting the load applied to seat belts and utilizing motor driven seat belt retractors. Background technique [0002] In the past, seat belt devices installed on vehicles such as automobiles, in emergency situations such as collisions with large decelerations acting on the vehicle, restrained the occupant with the seat belt to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R22/343
CPCB60R22/44B60R2022/285B60R22/40B60R2022/287B60R2022/284B60R2022/288B60R2022/4473B60R22/3413
Inventor 野村康哲
Owner TAKATA CORPORATION
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