Seat belt retractor and seat belt device
First Claim
1. A seat belt retractor comprising:
- a spool for retracting and unwinding a seat belt;
an electric motor;
a power transmission mechanism that is interposed between the electric motor and the spool, wherein the power transmission mechanism is configured to form a connected state in which the electric motor and the spool are connected to each other and a disconnected state in which the connected state is released;
a control unit for controlling the electric motor and the power transmission mechanism;
a first detecting unit for detecting whether the seat belt is held during the retraction of the seat belt; and
a second detecting unit for detecting whether the power transmission mechanism is in the connected state or the disconnected state.
1 Assignment
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Accused Products
Abstract
The disclosed seat belt retractor may be useful in smoothly performing the storing operation of a seat belt in the seat belt retractor to be mounted on a vehicle in which the power transmission mechanism is switched from a connected state to a disconnected state by means of a rotational speed difference between the electric motor and the spool so as to release the connection between the electric motor and the spool. The seat belt retractor may comprise a spool for retracting and unwinding a seat belt, an electric motor, a power transmission mechanism, a control unit for controlling the electric motor and the power transmission mechanism, and a detecting unit for detecting whether the seat belt is held during the retraction of the seat belt.
27 Citations
19 Claims
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1. A seat belt retractor comprising:
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a spool for retracting and unwinding a seat belt;
an electric motor;
a power transmission mechanism that is interposed between the electric motor and the spool, wherein the power transmission mechanism is configured to form a connected state in which the electric motor and the spool are connected to each other and a disconnected state in which the connected state is released;
a control unit for controlling the electric motor and the power transmission mechanism;
a first detecting unit for detecting whether the seat belt is held during the retraction of the seat belt; and
a second detecting unit for detecting whether the power transmission mechanism is in the connected state or the disconnected state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A seat belt device comprising:
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a seat belt; and
a seat belt retractor, wherein the seat belt retractor comprises;
a spool for retracting and unwinding a seat belt;
an electric motor;
a power transmission mechanism that is interposed between the electric motor and the spool, wherein the power transmission mechanism is configured to form a connected state in which the electric motor and the spool are connected to each other and a disconnected state in which the connected state is released;
a control unit for controlling the electric motor and the power transmission mechanism;
a first detecting unit for detecting whether the seat belt is held during the retraction of the seat belt; and
a second detecting unit for detecting whether the power transmission mechanism is in the connected state or the disconnected state.
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14. A seat belt retractor comprising:
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a spool for retracting and unwinding a seat belt;
an electric motor;
a power transmission mechanism that is interposed between the electric motor and the spool, wherein the power transmission mechanism is configured to form a connected state in which the electric motor and the spool are connected to each other and a disconnected state in which the connected state is released;
a control unit for controlling the electric motor and the power transmission mechanism;
a detecting unit for detecting whether the seat belt is held during the retraction of the seat belt, wherein, when a holding of the seat belt is detected by the detecting unit during the retraction of the seat belt, the control unit is configured to control the electric motor so that the electric motor is rotated in a direction at a holding state discrimination speed. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification