Seat belt retractor

Abstract

The invention discloses a seat belt retractor. The seat belt retractor comprises a self-locking device and a winding shaft; the winding shaft comprises a winding drum body, a force-limiting mandrel and a shaft end piece, wherein the winding drum body is used for winding a fabric tape, the force-limiting mandrel is arranged in an internal cavity of the winding drum body, and the shaft end piece is fixedly connected with the self-locking device; the force-limiting mandrel comprises a rotary part, a mandrel body and a locking part; the shaft end piece is in rotation-stopping connection with the locking part; one end of the winding drum body is in rotation-stopping connection with the rotary part; both the other end of the winding drum body and the shaft end piece are provided with pin holes and are in pin connection through a driving pin; the shaft end piece is fixedly or integrally connected with the self-locking device; and the mandrel body is a shaft piece, wherein two ends of the mandrel body can be relatively twisted so as to form angles of twist. The retractor is provided with the mandrel body which can be twisted and have a force-limiting function, so that after a seat belt is locked, a small section of fabric tape can be further released to exert a buffering function, avoid holding the body of a passenger too firmly, prevent the chest and abdomen of the passenger from being injured by extruding, and reduce and alleviate the injury to the neck of the passenger.

Description

technical field [0001] The invention relates to a safety belt, in particular to a safety belt retracting device. Background technique [0002] At present, a car is usually equipped with a three-point safety belt, which surrounds the occupant's chest and abdomen, preventing the occupant from colliding with the vehicle body by leaning forward or throwing forward under the action of inertia. When the vehicle collides, the occupant leans forward quickly and pulls the seat belt webbing, causing the seat belt to lock itself, thereby preventing the occupant from leaning forward to protect the occupant. However, when the car collides violently or the car runs at high speed and brakes suddenly, the blocking effect of the self-locking seat belt on the occupant and the inertia of the occupant conflict with each other and often cause crush injuries to the occupant's chest and abdomen. The self-locking and fixed seat belt hugs the occupant's body too firmly, and the occupant's head stre...

AI Technical Summary

Problems solved by technology

However, when the car collides violently or the car runs at high speed and brakes suddenly, the blocking effect of the self-locking seat belt on the occupant and the inertia of the occupant conflict with each other and often cause crush injuries to the occupant's chest and abdomen.

The self-locking and fixed seat belt hugs the occupant's body too firmly, and the occupant's head stretches forward under the action of inertia, which may easily cause the occupant's neck to be strained

Images