Automatic bicycle pedal with engagement arches
A pedal includes a pedal body ( 1 ) mounted rotatably on a pedal axle ( 2 ) and having at least two arches ( 7 ) for engaging an engagement member ( 8 ) fixed below a cyclist's shoe. The arches have opposite branches connected to the pedal body and they are disposed one after the other about the periphery of the pedal body ( 1 ) so as to define between them an engagement surface for the engagement member ( 8 ) against the pedal body ( 1 ). The two arches ( 7 ) are adapted to be urged toward each other by resilient return elements returning them to a retention position for the engagement member ( 8 ). At least one of the at least two arches is a resilient arch constituting the resilient return elements, and the ends of this resilient arch have bending axes that are offset relative to each other.
1. Automatic bicycle pedal, comprising a pedal body ( 1 ) mounted rotatably on a pedal axle ( 2 ) and provided with retaining means ( 7 ) for an engagement member ( 8 ) fixed below a cyclist's shoe, said retaining means comprising at least two arches ( 7 ) independent from one another having opposite branches connected to said pedal body, said at least two arches ( 7 ) being disposed one after the other about the periphery of said pedal body ( 1 ) so as to define between them an engagement surface ( 9 ) for said engagement member ( 8 ) against said pedal body ( 1 ), said at least two arches ( 7 ) being adapted to be urged toward each other by resilient return means returning them into a retaining position of said engagement member ( 8 ) against said engagement surface ( 9 ), at least one of said at least two arches being a resilient arch constituting moreover said resilient return means;
wherein the ends of said resilient arch are bent laterally and have bending axes (B-B, C-C) defined by an inner recess ( 10 ) and an outer recess ( 11 ), respectively, the arch ( 7 ) on said pedal body extending substantially parallel to the axis of the outer recess, said inner and outer recesses ( 10 , 11 ) being angularly offset (α; β)relative to each other about the axis of rotation (A-A) of the pedal so as to offset the bending axes (B-B, C-C) relative to each other.
2. Automatic pedal according to claim 1 , characterized by the fact that the branches of each arch ( 7 ) have different lengths.
3. Automatic pedal according to claim 2 , characterized by the fact that the shorter branch of said branches of each arch ( 7 ) is the inner branch.
4. Automatic pedal according to claim 1 , characterized by the fact that the branches of each arch ( 7 ) are located in different planes when the arch is pre-stressed.
5. Automatic pedal according to claim 1 , characterized by the fact that one of said at least two arches ( 7 ) is a rear arch formed by a resilient metallic wire.
6. Automatic pedal according to claim 1 , characterized by the fact that said at least two arches ( 7 ) are formed by a respective resilient metallic wire.
7. Automatic pedal according to claim 1 , characterized by the fact that said arches ( 7 ) are four in number and that said inner and outer recesses ( 10 , 11 ) are regularly distributed at 90° relative to each other so as to receive the ends of the arches ( 7 ) so as to define four engagement surfaces ( 9 ) between them.
8. Automatic pedal according to claim 1 , characterized by the fact that said arches ( 7 ) are three in number and that said inner and outer recesses ( 10 , 11 ) are regularly spaced 120° apart from each other so as to receive the ends of the arches in a manner to define between them three engagement surfaces.
9. Automatic pedal according to claim 1 , characterized by the fact that said inner and outer recesses ( 10 , 11 ) extend substantially parallel to the axis of said pedal body ( 1 ) and are disposed on the same circle centered on the axis of rotation (A-A) of the pedal.
10. Automatic pedal according to claim 1 , characterized by the fact that each inner recess ( 10 ) of an arch ( 7 ) is aligned on an outer recess ( 11 ) of an adjacent arch ( 7 ).
11. Automatic pedal according to claim 1 , characterized by the fact that said recesses ( 10 , 11 ) are formed by bores and that the ends of the arches ( 7 ) have a complementary cylindrical shape.
12. Automatic pedal according to claim 1 , characterized by the fact that said outer recesses ( 11 ) are provided on an axially outer support element ( 12 ) connected to the pedal body ( 1 ).
13. Automatic pedal according to claim 12 , characterized by the fact that said outer support element 12 is fixed to the pedal body ( 1 ) with a pin ( 14 ) passing through holes ( 15 , 16 ) provided in said outer support element ( 12 ) and in said pedal body ( 1 ).
14. Automatic pedal according to claim 12 , characterized by the fact that said inner recesses ( 10 ) are provided on an axially inner support element ( 18 ) connected to said pedal body ( 1 ).
15. Automatic pedal according to claim 14 , characterized by the fact that said inner support element ( 18 ) is fixed to the pedal body with the help of two pins ( 20 , 21 ) passing through holes ( 22 , 23 ) provided in said inner support element ( 18 ) so as to extend on opposite sides of said pedal axle ( 2 ).
16. Automatic pedal according to claim 1 , characterized by the fact that the two ends of a same arch ( 7 ) are directed inwardly, said outer recesses ( 11 ) being provided on an end surface ( 33 ) of the pedal body ( 1 ).
17. Automatic pedal according to claim 16 , characterized by the fact that an end element ( 34 ) is fixed to said end surface ( 33 ) of said pedal body ( 1 ) so as to cap the latter.
18. Automatic pedal according to claim 1 , characterized by the fact that said arches ( 7 ) bear partially against a removable ring ( 38 ) disposed on the end of the pedal body ( 1 ) so as to permit the adjustment of the pre-stress of the arches ( 7 ) as a function of the thickness of said ring ( 38 ).
19. Automatic pedal according to claim 1 , characterized by the fact that said arches ( 7 ) partially bear against bearing surfaces provided in recesses ( 18 a , 18 b ) provided on said pedal body ( 1 ).