Blocking device for a vehicle belt

Claim 2

A blocking device for a belt and in particular a vehicle safety belt, the device comprising a support, a fixed member fixed relative to the support and a movable member movable between a first position in which it is spaced sufficiently away from the fixed member to allow the belt to move longitudinally freely between said members and a second position in which the movable member clamps the belt against the fixed member, an arrangement of articulated links, pivotally interconnecting said members in such manner as to result in an increased clamping of the movable member against the belt when the clamping has been initiated, supplementary guide means along which and in contact with which guide means the belt is movable, said guide means being pivotable relative to the support and operatively connected to the movable member, and resiliently yieldable means for normally maintaining the guide means in such position that the belt is transversely deviated and longitudinally defines a broken line so that under the effect of a traction exerted on the belt which renders the belt taut, the belt urges back the guide means in opposition to the action of the resiliently yieldable means, the operative connection of the guide means to the movable members being such that the guide means is capable of bringing the movable member to said second position when urged back by the belt.

Claim 3

A device as claimed in claim 1, wherein the guide means is carried by one of the articulated links pivotally interconnecting the two members.

Claim 4

A blocking device for a belt and in particular a vehicle safety belt, the device comprising a support, a fixed member fixed relative to the support and a movable member movable between a first position in which it is spaced sufficiently away from the fixed member to allow the belt to move longitudinely freely between said members and a second position in which the movable member clamps the belt against the fixed member, a first pair of links and a second pair of links which are at the rear of the first pair of links with respect to the direction of the force of traction exerted on the belt in belt use, the first pair of links having one end pivotally mounted relative to the support and an opposite end pivoted to the movable member, the second pair of links having one end pivotally mounted relative to the support and an opposite end pivoted to the movable member, the two pairs of links being operative to result in an increased clamping of the movable member against the belt when the clamping has been initiated, supplementary guide means along which and in contact with which guide means the belt is movable, said guide means being associated with the rear pair of links, and resiliently yieldable means for normally maintaining the guide means in such position that the belt is transversely deviated and longitudinally defines a broken line so that under the effect of a traction exerted on the belt which renders the belt taut, the belt urges back The guide means in opposition to the action of the resiliently yieldable means, the guide means being positioned relative to the second pair of links to be capable of bringing the movable member to said second position when urged back by the belt.

Claim 5

A blocking device for a belt and in particular a vehicle safety belt, the device comprising a support, a fixed member fixed relative to the support and a movable member movable between a first position in which it is spaced sufficiently away from the fixed member to allow the belt to move longitudinely freely between said members and a second position in which the movable member clamps the belt against the fixed member, a first pair of links and a second pair of links which are at the rear of the first pair of links with respect to the direction of the force of traction exerted on the belt in belt use, the first pair of links having one end pivotally mounted relative to the support and an opposite end pivoted to the movable member, the second pair of links having one end pivotally mounted relative to the support and an opposite end pivoted to the movable member, the two pairs of links being operative to result in an increased clamping of the movable member against the belt when the clamping has been initiated, supplementary guide means along which and in contact with which guide means the belt is movable, said guide means being associated with the rear pair of links, and resiliently yieldable means for normally maintaining the guide means in such position that the belt is transversely deviated and longitudinally defines a broken line so that under the effect of a traction exerted on the belt which renders the belt taut, the belt urges back The guide means in opposition to the action of the resiliently yieldable means, the guide means being positioned relative to the second pair of links to be capable of bringing the movable member to said second position when urged back by the belt.

Claim 6

A device as claimed in claim 2, comprising a fork device having two branches which are pivotally mounted by two parallel pins respectively on the fixed member and on the movable member, the guide means being mounted on the branches.

Claim 7

A device as claimed in claim 4, wherein said fork device comprises at least one abutment surface which cooperates with a support surface for determining the first position of the movable member.