Reversible belt tensioner for vehicle occupant restraint systems
First Claim
1. A reversible belt buckle tensioner comprisinga drive motor (12),a spindle (14) connected to the drive motor (12),a spindle nut (16) adapted to be displaced relative to the drive motor in axial direction (18) on the spindle (14),a catch (20) having a first end which is connected to the spindle nut (16),a belt buckle (22) connected to a second end of the catch (20);
- anda cylindrical guiding portion (50) inside the spindle nut (16) which interacts with only an outermost diameter of the spindle (14).
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Accused Products
Abstract
The invention relates to a reversible belt tensioner (10) comprising a drive motor (12), a spindle (14) connected to the drive motor (12), a spindle nut (16) adapted to be displaced in axial direction (18) on the spindle (14), a catch (20) the one end of which is connected to the spindle nut (16) and a belt buckle (22) connected to the other end of the catch (20), wherein at least one of the following features prevents the spindle nut (16) from jamming during travel against block:
- a cylindrical guiding portion (50) inside the spindle nut (16) interacting with the outer geometry of the spindle (14);
- a freewheel mechanism (48) between the drive motor (12) and the spindle (14);
- a compression spring (70) between the belt buckle (22) and a stop.
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Citations
27 Claims
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1. A reversible belt buckle tensioner comprising
a drive motor (12), a spindle (14) connected to the drive motor (12), a spindle nut (16) adapted to be displaced relative to the drive motor in axial direction (18) on the spindle (14), a catch (20) having a first end which is connected to the spindle nut (16), a belt buckle (22) connected to a second end of the catch (20); - and
a cylindrical guiding portion (50) inside the spindle nut (16) which interacts with only an outermost diameter of the spindle (14). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A reversible belt buckle tensioner comprising
a drive motor (12), a spindle (14) connected to the drive motor (12), a spindle nut (16) adapted to be displaced relative to the drive motor in axial direction (18) on the spindle (14), a catch (20) having a first end which is connected to the spindle nut (16), a belt buckle (22) connected to a second end of the catch (20); - and
a freewheel mechanism (48) between the drive motor (12) and the spindle (14). - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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Specification