| 摘要 |
In the manufacture of a seat belt retractor, it is usual to join together a pre-stressed spring cassette with a part which includes the seat belt reel. A spring cassette is provided which includes a pin (20) for locking the spring core (16) and spring cover (10) to prevent them from rotating once the spring (14) has been pre-stressed to exert a desired torque. The spring cassette can then be conveniently handled when assembling the seat belt retractor, and then the pin (20) can be slid within the spring cassette to unlock the spring core (16) and spring cover (10) to allow the seat belt retractor to function as usual.
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