| 摘要 |
Disclosed herein is an automatic locking retractor suitable for use in a vehicle seat belt. The retractor does not produce any substantial unpleasant noise when the webbing is wound up, because its cog wheels and lock lever are kept separated while the webbing is wound up. The retractor features use of a ratchet wheel, latch gear and control member. The ratchet wheel and latch gear are rotatable together with the cog wheels. The control member is normally kept in engagement with the latch gear but can assume a first and second working positions when the webbing is pulled out and taken up respectively. At the working positions, the control member is kept in contact with the path of rotation of the circumference of the latch gear. When the webbing is pulled out, the pawl engages with the control member but is kept out of engagement with the ratchet wheel. When the webbing is then wound back over a small length, the pawl is disengaged from the control member but is then kept engageable with the ratchet wheel. When the webbing is pulled out again, the pawl is brought into engagement with the ratchet wheel and the lock lever is brought into engagement with the cog wheels to restrain any further release of the webbing.
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