| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To form a structure for end lock prevention more compact while devising it to effectively prevent end lock by a belt drawing sensor. <P>SOLUTION: A state where a planetary gear 35 only revolves and a state where the planetary gear 35 revolves and rotates are alternately repeated when a carrier 34 rotates through a torsion bar 13 by rotation of a spool. A cam plate 33 to control turning of an oscillation avoiding member 23 of the belt drawing sensor 11 does not relatively rotate against a lock gear when the planetary gear 35 only revolves. The cam plate 33 relatively accelerates and rotates against the lock gear when the planetary gear 35 revolves and rotates. Additionally, it is possible to reduce relative rotational quantity of the cam plate 33 and to shorten a cam groove of the cam plate 33 as the cam plate 33 intermittently and relatively rotates against the lock gear 27 when the spool rotates. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
