JP2021035835A5

JP2021035835A5 -

Info

Publication number: JP2021035835A5
Application number: JP2020193319A
Authority: JP
Filing date: 2020-11-20
Publication date: 2021-09-24
Anticipated expiration: 2038-08-17

Claims

A seatbelt retractor that is attached to the seatback of a reclining seat and winds up the seatbelt when needed.
It is arranged at the connecting portion between the seat back of the reclining seat and the seat cushion, and has a cable for detecting the tilt angle when the seat back tilts in the front-rear direction of the vehicle and transmitting the tilt angle to the seat belt retractor. Cable advance / retreat mechanism and
A seatbelt device equipped with
The cable advancing / retreating mechanism is
The cable moves forward or backward in the length direction of the cable at a distance corresponding to the inclination angle of the seat back.
The seatbelt retractor is
The retractor frame fixed to the seat back and
A spindle supported by the retractor frame and for winding the seat belt,
An acceleration sensor attached to the retractor frame to detect acceleration in the front-rear direction of the vehicle,
A lock mechanism that locks the seatbelt pull-out operation according to the acceleration in the vehicle front-rear direction detected by the acceleration sensor.
It has an attitude control mechanism that keeps the sensor reference plane of the acceleration sensor horizontal.
The acceleration sensor is
The sensor cover fixed to the retractor frame and
It has an inertial body that moves in the front-rear direction of the vehicle when an acceleration of a predetermined value or more is applied in the front-rear direction of the vehicle, and a swing axis along the left-right direction of the vehicle. It has a sensor housing having the sensor reference surface, and a sensor assembly body including an operating member that operates the lock mechanism toward the lock side in conjunction with the movement of the inertial body in the vehicle front-rear direction.
The attitude control mechanism is
A rotating member that rotates an angle according to the forward or backward distance of the cable by the cable advancing / retreating mechanism is provided.
The seatbelt retractor further
A rotation transmission mechanism that transmits the rotation of the rotating member to the sensor housing to swing the sensor housing in the front-rear direction of the vehicle is included.
The center of gravity of the sensor assembly in which the inertial body is placed on the sensor reference surface is located at a position deviated from the vertical line passing through the axial center of the swing shaft of the sensor housing. Position to,
The sensor housing includes a pair of arm portions located so as to sandwich a pin provided on the rotating member.
The seatbelt device is characterized in that the pin is elastically deformable so that the maximum outer diameter dimension can be reduced by providing a slit, and is in constant contact with both inner side surfaces of the pair of arm portions at the same time. ..

The retractor frame is fixed to the seat back by tilting the center of the seat back in the left-right direction in the left-right direction of the vehicle with respect to a straight line extending in the vertical direction.
The rotation shaft of the rotating member and the swing shaft of the sensor housing have a predetermined angle with respect to the vehicle left-right direction so that the swing shaft of the sensor housing is installed in the horizontal direction with respect to the vehicle left-right direction. The seat belt device according to claim 1, wherein the seat belt devices intersect with each other.