| 摘要 |
A pressure-free type seat belt retractor wherein the wearer has a large "degree of freedom", i.e., permitting movement for a considerable distance beyond a "pressure-free point" without resetting so as to require retraction and subsequent withdrawal of the belt. A gate member, in the form of a disc is driven by a clutch from the retractor spool, is cooperable with a gate latch. The gate member has a cam surface which cooperates with a pawl so as to inhibit retraction after (1) withdrawal of the belt has caused the gate latch to engage the gate member and restrain its rotation; (2) initial retraction of the belt has released the latch from the member, and (3) further withdrawal has allowed the pawl to move to a retraction inhibiting position and establishing the "pressure-free point." The cam surface may again lift the pawl from the inhibiting position as belt withdrawal occurs, but upon subsequent retraction the pawl returns to the inhibiting position. The gate member is geared to rotate at a lower speed than the spool providing a larger "degree of freedom" without requiring resetting of the "pressure-free point.
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