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Seatbelt control device

Active Publication Date: 2020-01-31
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the degree of tightness of the seat belt before the somatosensory alarm is high, if the amount of seat belt winding at the initial stage of the somatosensory alarm is relatively increased as in the above-mentioned existing seat belt control device, there will be a problem with the somatosensory alarm. Initial Overtightening Seat Occupant Concerns
On the other hand, when the degree of tightness of the seat belt is low, even if the amount of seat belt winding at the initial stage of the somatosensory alarm is relatively increased like the above-mentioned existing seat belt control device, it is impossible to pass the seat belt. If the seat occupant is sufficiently fastened, there is a concern that the effectiveness of the sensory alarm based on the seat belt will be reduced
[0006] In this way, in the above-mentioned conventional seat belt control device, there are cases where it is not possible to give the seat occupant an appropriate somatosensory alarm based on the seat belt.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0018] figure 1 It is a schematic configuration diagram of the seat belt device 100 and the electronic control unit 200 for controlling the seat belt device 100 according to the first embodiment of the present invention.

[0019] The seat belt device 100 is, for example, a device that is attached to a seat of a mobile body such as a vehicle for restraining a seat occupant to the seat. The seat belt device 100 of this embodiment includes a seat belt 1 , a spool 2 , a coil spring 3 , a power transmission mechanism 4 , a motor 5 , a voltage adjustment circuit 6 , a battery 7 , and a current sensor 8 .

[0020] The seat belt 1 is a belt-shaped belt for restraining a seat occupant to the seat.

[0021] The spool 2 is a member for winding and storing the seat belt 1 in layers on the outer peripheral surface of the belt take-up portion 22 , and includes a spool rotating shaft 21 and a cylindrical belt take-up portion 22 , The webbing take-up unit 22 is fixed to the spool rotating s...

no. 2 approach

[0063] Next, a second embodiment of the present invention will be described. In the present embodiment, the configuration of the motion sensing alarm operation implementing unit 203 is different from that in the first embodiment. The following description will focus on this difference.

[0064] Figure 4 It is a timing chart explaining the operation of the sensory alarm control of this embodiment.

[0065] In the above-mentioned first embodiment, when the sensory alarm operation is started at time t3, the forward rotation operation of causing the motor 5 to rotate forward and the operation of short-circuiting the terminals of the motor 5 to place the motor 5 in the short-circuit braking state are repeated alternately. Braking action, thereby increasing the tightness of the seat belt step by step.

[0066] For this, in this embodiment, if Figure 4 As shown, when the sensory alarm is activated, the motor 5 is reversed in the reverse direction during the period of the brakin...

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PUM

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Abstract

The invention provides a seatbelt control device which performs appropriate kinesthetic warning based on a seatbelt for a seat occupant. The seatbelt control device (200) comprises a kinesthetic warning control part (201) changing a tightness of a seatbelt (1) against a seated passenger to kinesthetically warn the seated passenger. The kinesthetic warning control part is provided with a fitting operation part (202) performing a fitting operation controlling a time for making the motor operate forward based on a motor current value when making the motor (5) operate forward and controlling a belt tightness to an initial belt tightness, and a kinesthetic warning operation part (203) performing a kinesthetic warning operation making the tightness of the seatbelt rise in stages from the initialbelt tightness by repeating a forward operation making the motor operate forward and at least one operation of a braking operation short-circuiting the terminals of the motor to render the motor a short brake state or a reverse operation making the motor operate in reverse and is configured to perform the fitting operation before performing the kinesthetic warning operation.

Description

technical field [0001] The present invention relates to seat belt control devices. Background technique [0002] Patent Document 1 discloses, as a conventional seat belt control device, a configuration capable of increasing or decreasing the tension of a seat belt (webbing) for restraining a seat occupant of a vehicle by repeating a plurality of times. The seat belt control device performs the operation of the seat belt, that is, alternately repeats the winding operation and the drawing operation of the seat belt, and provides a sensory alarm based on the seat belt to the seat occupant. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2007-022400 [0004] However, the above-mentioned conventional seat belt control device is configured so that the amount of seat belt winding by the seat belt winding operation in the initial stage of the sensory alarm is larger than that in the later stage of the sensory alarm. Winding amount. [0005] The tightness of the seat bel...

Claims

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Application Information

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IPC IPC(8): B60R22/34B60R22/44B60R22/46
CPCB60R22/34B60R22/44B60R22/46B60R2022/4473B60R2022/4666B60R16/023
Inventor 泽井俊一郎松村健佐藤润
Owner TOYOTA JIDOSHA KK