Seat belt retractor
First Claim
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1. A seat belt retractor comprising:
- a spool capable of winding and unwinding a seat belt;
an electric motor;
a power transmission mechanism configured to transmit the power of the electric motor to the spool in order to achieve the winding action and the unwinding action of the spool;
a detection sensor configured to detect information about behavior of a spool-side member; and
a control mechanism configured to switch the power transmission mechanism between a power transmission engaging state in which the power of the electric motor is transmitted to the spool and the power transmission disengaging state in which the power transmission is cancelled, wherein the control mechanism controls the seat belt retractor to be in the power transmission engaging state to perform the seat belt winding action when the control mechanism determines, based on information about behavior of the spool-side member detected by the detection sensor, that the seat belt storing operation is needed.
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Abstract
A seat belt retractor for a vehicle is structured such that when it is determined, based on information about rotational behavior of a spool detected by a detection sensor, that the seat belt storing operation is needed, the seat belt retractor is controlled to be the power transmission engaging state so as to perform the seat belt winding-up action.
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Citations
9 Claims
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1. A seat belt retractor comprising:
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a spool capable of winding and unwinding a seat belt;
an electric motor;
a power transmission mechanism configured to transmit the power of the electric motor to the spool in order to achieve the winding action and the unwinding action of the spool;
a detection sensor configured to detect information about behavior of a spool-side member; and
a control mechanism configured to switch the power transmission mechanism between a power transmission engaging state in which the power of the electric motor is transmitted to the spool and the power transmission disengaging state in which the power transmission is cancelled, wherein the control mechanism controls the seat belt retractor to be in the power transmission engaging state to perform the seat belt winding action when the control mechanism determines, based on information about behavior of the spool-side member detected by the detection sensor, that the seat belt storing operation is needed. - View Dependent Claims (2, 3)
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4. A seat belt apparatus comprising:
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a seat belt to be worn by a vehicle occupant;
a seat belt buckle;
a buckle switch capable of detecting information about the connecting state of the seat belt relative to the seat belt buckle;
a spool capable of winding and unwinding a seat belt;
an electric motor;
a power transmission mechanism configured to transmit the power of the electric motor to the spool to achieve the winding action and the unwinding action of the spool;
a detection sensor configured to detect information about behavior of a spool-side member; and
a control mechanism for switching the power transmission mechanism between a power transmission engaging state in which the power of the electric motor is transmitted to the spool and the power transmission disengaging state in which the power transmission is cancelled, wherein the control mechanism is configured to control the seat belt retractor to be in the power transmission engaging state to perform the seat belt winding action when the control mechanism determines, based on the information about behavior of the spool-side member detected by the detection sensor and information about the connecting state of the seat belt detected by the buckle switch, that a seat belt storing operation is needed. - View Dependent Claims (5, 6)
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7. A vehicle comprising:
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a seat belt apparatus, the seat belt apparatus including;
a seat belt to be worn by a vehicle occupant;
a seat belt buckle;
a buckle switch capable of detecting information about the connecting state of the seat belt relative to the seat belt buckle;
a spool capable of winding and unwinding a seat belt;
an electric motor;
a power transmission mechanism configured to transmit the power of the electric motor to the spool to achieve the winding action and the unwinding action of the spool;
a detection sensor configured to detect information about behavior of a spool-side member; and
a control mechanism for switching the power transmission mechanism between a power transmission engaging state in which the power of the electric motor is transmitted to the spool and the power transmission disengaging state in which the power transmission is cancelled, wherein the control mechanism controls the seat belt retractor to be in the power transmission engaging state to perform the seat belt winding action when the control mechanism determines, based on information about behavior of the spool-side member detected by the detection sensor and information about the connecting state of the seat belt detected by the buckle switch, that a seat belt storing operation is needed, and wherein the seat belt apparatus is accommodated in an accommodating space in the vehicle. - View Dependent Claims (8, 9)
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Specification