Seat belt take-up control system

Patent metadata

Field	Value
Publication number	US-2020282949-A1
Application number	US-202016738050-A
Country	US
Kind code	A1
Filing date	Jan 9, 2020
Priority date	Mar 4, 2019
Publication date	Sep 10, 2020
Grant date	—

Abstract

A seat belt take-up control system includes: a first belt-take-up unit mounted at a child seat, the first belt-take-up unit taking up a seat belt of a vehicle seat and applying a predetermined tension at a time of fastening the seat belt; a belt lock unit that prevents pulling out of the seat belt in a state which the seat belt has been taken up by the first belt-take-up unit; and an second belt-take-up unit that, in a state in which pulling out of the seat belt has been locked by the belt lock unit, takes up the seat belt and applies a predetermined tension after the seat belt is fastened in at least one of a case in which pulling out of the seat belt is detected or a case in which a predetermined period of time has elapsed.

First claim

What is claimed is:

1 . A seat belt take-up control system, comprising:
a first belt-take-up unit mounted at a child seat, the first belt-take-up unit taking up a seat belt of a vehicle seat and applying a predetermined tension at a time of fastening the seat belt; a belt lock unit that prevents pulling out of the seat belt in a state in which the seat belt has been taken up by the first belt-take-up unit; and a second belt-take-up unit that, in a state in which pulling out of the seat belt is prevented by the belt lock unit, takes up the seat belt and applies a predetermined tension after the seat belt is fastened in at least one of a case in which pulling out of the seat belt is detected or a case in which a first predetermined period of time has elapsed.

2 . The seat belt take-up control system recited in claim 1 , wherein the seat belt is taken up in a case in which a predetermined amount or more of gravitational acceleration or more is detected to have acted on a vehicle.

3 . The seat belt take-up control system recited in claim 1 , further comprising a seating detection unit that detects that an occupant is seated in the child seat, the second belt-take-up unit being enabled in a case in which the seating detection unit detects that the occupant is seated in the child seat, and the second belt-take-up unit being disabled in a case in which the seating detection unit does not detect that an occupant is seated in the child seat.

4 . The seat belt take-up control system recited in claim 1 , wherein the first belt-take-up unit takes up the seat belt in a case in which the seat belt has been pulled a predetermined number of times within a second predetermined period of time, in a state in which a tongue plate is inserted into a buckle.

5 . The seat belt take-up control system recited in claim 1 , wherein a seating sensor that detects that an occupant is seated in the vehicle seat is provided inside a seat cushion, the seating sensor not being turned on in a state in which the child seat is attached to the vehicle seat, and a threshold value being adjusted such that the seating sensor turns on in a case in which the occupant is seated in the child seat.

Assignees

• Toyota Motor Co Ltd

Inventors

• Yamamoto Kazuhito

Classifications

• B60R22/347 Primary

  with means for permanently locking the retractor during the wearing of the belt ({B60R22/3405} , B60R22/343, B60R22/415 take precedence) · CPC title

• B60R22/105

  for children (adaptation of children's seats for seat belts B60N2/265, B60N2/2803) · CPC title

• B60R22/42

  having means for acting directly upon the belt, e.g. by clamping or friction {(not combined with the retractor B60R22/185)} · CPC title

• B60R22/48 Primary

  Control systems, alarms, or interlock systems, for the correct application of the belt or harness · CPC title

• B60R2022/4825

  for sensing amount of belt winded on retractor · CPC title