FR2894930A3 - Bicycle brake mechanism, has brake cable extending across front yoke, brake levers with brake pads arranged inside body, and connection units connected to two ends of levers and body so that levers are displaced simultaneously - Google Patents

Bicycle brake mechanism, has brake cable extending across front yoke, brake levers with brake pads arranged inside body, and connection units connected to two ends of levers and body so that levers are displaced simultaneously Download PDF

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Publication number
FR2894930A3
FR2894930A3 FR0512946A FR0512946A FR2894930A3 FR 2894930 A3 FR2894930 A3 FR 2894930A3 FR 0512946 A FR0512946 A FR 0512946A FR 0512946 A FR0512946 A FR 0512946A FR 2894930 A3 FR2894930 A3 FR 2894930A3
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France
Prior art keywords
brake
links
levers
mechanism according
extending
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Granted
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FR0512946A
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French (fr)
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FR2894930B3 (en
Inventor
Sandro Montanari
Ermanno Righi
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Tien Hsin Industries Co Ltd
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Tien Hsin Industries Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62LBRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L1/00Brakes; Arrangements thereof
    • B62L1/02Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements
    • B62L1/06Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged
    • B62L1/10Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)

Abstract

The mechanism (1) has a body (10) situated above a front wheel, and a pivoting element (20) adapted to be connected to a brake cable which extends across a front yoke. Two brake levers (40) are arranged inside the body and connected in a movable manner to the body by two tubes (42). Each lever has a brake pad (41) connected to the lever. The two tubes are in contact with the element so that the levers are displaced when the element is actuated in rotation. Connection units are connected to two ends of levers and the body in a pivoting manner so that the levers are displaced simultaneously.

Description

MECANISME DE FREIN DE BICYCLETTEBICYCLE BRAKE MECHANISM

La presente invention concerne un mecanisme de frein de bicyclette qui comprend des liaisons pour activer les deux patins de frein afin d'appuyer sur la jante de maniere simultanee.  The present invention relates to a bicycle brake mechanism which includes links for activating the two brake pads to simultaneously press the rim.

Les systemes de frein conventionnels comprennent le systeme de frein a disque et le systeme de frein a &trier. Le systeme de frein a disque comprend un mecanisme complexe et peut freiner la roue brusquement. Le systeme de frein a &trier est economique a fabriquer et est appropri& pour arreter des roues tournant a faible vitesse. Le systeme de frein a disque utilise de 1'huile pour activer 1'action de freinage et le systeme de frein a &trier utilise des cables de frein pour faire pivoter deux patins de frein afin d'arreter la roue. Le cable de frein est reli& a un cable de relais qui presente deux extremit&s reliees respectivement a deux leviers de frein de sorte que lorsque le cable de frein tire sur le cable de relais, les deux leviers de frein pivotent et les patins de frein des deux leviers de frein sont d&plac&es pour arreter la roue. Il est note que les deux patins de frein ne peuvent pas entrer en contact avec la jante simultan&ment. En d'autres termes, un des patins entre en contact avec la jante en premier de sorte qu'une force dans une direction est appliquee sur la jante, puis 1'autre patin de frein entre en contact avec la jante dans une direction opposee. En raison du fait qu'au debut de 1'action de freinage, seulement un patin de frein est en contact avec la jante de sorte que la vitesse de la jante ne diminue pas comme cela est souhaite, la distance de freinage est donc prolongee. L'objectif de la presente invention est de proposer un mecanisme de frein de bicyclette dont les patins de frein sont en contact avec la jante de roue simultanement pour arreter la roue efficacement. Plus precisement, la presente invention propose un mecanisme de bicyclette dans lequel le cable de frein s'etend a travers la fourche avant.  Conventional brake systems include the disc brake system and the brake system to be sorted. The disc brake system includes a complex mechanism and can brake the wheel abruptly. The brake system to be sorted is economical to manufacture and is suitable for stopping wheels rotating at low speed. The disk brake system uses oil to activate the braking action and the brake system to be sorted utilizes brake cables to pivot two brake pads to stop the wheel. The brake cable is connected to a relay cable which has two ends connected respectively to two brake levers so that when the brake cable pulls on the relay cable, the two brake levers rotate and the brake pads of the two Brake levers are set to stop the wheel. It is noted that the two brake pads can not come into contact with the rim simultaneously. In other words, one of the pads contacts the rim first so that a force in one direction is applied to the rim and then the other brake pad contacts the rim in a opposite direction. Due to the fact that at the beginning of the braking action, only one brake pad is in contact with the rim so that the speed of the rim does not decrease as desired, the braking distance is therefore prolonged. The object of the present invention is to provide a bicycle brake mechanism whose brake pads are in contact with the wheel rim simultaneously to stop the wheel effectively. More specifically, the present invention provides a bicycle mechanism in which the brake cable extends through the front fork.

Ainsi, la presente invention a pour objet un mecanisme de frein de bicyclette comprenant : - un corps prevu pour etre situe au-dessus d'une roue avant et un element pivotant relie de fagon pivotante au corps et adapte pour etre relie a un cable de frein, et - deux leviers de frein disposes a 1'interieur du corps et relies de fagon mobile au corps par deux tubes, chaque levier de frein etant muni d'un patin de frein relie a celui-ci, les deux tubes etant en contact avec 1'element pivotant de sorte que les deux leviers de frein sont deplaces lorsque 1'element pivotant est actionne en pivotement, deux unites de liaison etant reliees de fagon pivotante a deux extremites de chacun des leviers de frein et du corps de sorte que les deux leviers de frein sont deplaces simultanement. Selon des modes preferes de realisation de la presente invention : - le corps comprend un element en forme de U et deux fentes definies a travers une partie superieure de deux extremites du corps, deux plaques s'etendent a partir des deux extremites du corps, deux segments de 1'element pivotant s'etendant de fagon mobile a travers les deux fentes et chaque segment comprenant une extremite en forme de L, deux goupilles s'etendant au travers des deux extremites en forme de L et de deux orifices prevus dans les deux plaques pour relier de fagon pivotante 1'element pivotant au corps ; - chacun des leviers de frein presente deux premieres pattes s'etendant a partir d'une premiere extremite de celui-ci et deux secondes pattes s'etendant a partir d'une seconde extremite de celui-ci, et les deux tubes sont respectivement relies aux secondes pattes des deux leviers de frein et s'etendent a travers deux premiers trous allonges definis a travers les deux extremites du corps ; - chacune des unites de liaison comprend deux premieres liaisons et deux secondes liaisons, les premieres liaisons presentent une premiere extremite reliee de fagon pivotante aux premieres pattes de chacun des deux leviers de frein, une seconde extremite des premieres liaisons est reliee de fagon pivotante a des pattes de liaison sur le corps, les secondes liaisons presentent une premiere extremite reliee de fagon pivotante aux secondes pattes de chacun des deux leviers de frein, et une seconde extremite des secondes liaisons est reliee de fagon pivotante a un trou debouchant dans chacune des deux extremites du corps ; - un trou debouchant est defini dans une partie superieure du corps et un connecteur est en prise avec is trou debouchant, le connecteur etant adapte pour recevoir le cable de frein ; - 1'element pivotant presente deux pattes superieures au milieu de celui-ci et une unite de fixation est reliee aux deux pattes superieures, 1'unite de fixation etant adaptee pour relier une extremite du cable de frein ; - un couvercle superieur est monte sur le corps et comprend deux seconds trous allonges qui sont en alignement avec les premiers trous allonges du corps, les tubes s'etendent a travers les deux seconds trous allonges ; - deux elements amortisseurs sont relies aux deux extremites du corps et sont adaptes pour etre en contact avec la fourche avant chacun des tubes presente, un capuchon d'extremite relie a une extremite distale de celui-ci ; - les deux tubes sont situes sur deux sections horizontales respectives des extremites en forme de L de 1'element pivotant ; - les deux goupilles presentent chacune une ouverture, et une agrafe elastique s'etend a travers 1'ouverture pour empecher la goupille d'etre tiree vers 1'arriere a travers les deux trous amenages dans les deux plaques du corps ; - une tige s'etend a travers la premiere extremite de chacune des premieres liaisons et les premieres pattes de chacun des leviers de frein pour former une premiere partie pivotante, une vis s'etend au travers de la seconde extremite de chacune des premieres liaisons, d'un ressort de torsion, d'un tube de support pour recevoir le ressort de torsion et des pattes de liaison de chaque extremite du corps et est reliee a un ecrou de fagon a former une premiere partie de positionnement, une autre tige s'etend a travers la premiere extremite de chacune des secondes liaisons, le tube entre les secondes pattes et les secondes pattes de chacun des leviers de frein pour former une seconde partie pivotante, une autre vis s'etend a travers la seconde extremite de chacune des secondes liaisons et le trou debouchant du corps et est reliee un autre ecrou de fagon a former une seconde partie de positionnement ; - les deux premieres liaisons et les deux secondes liaisons sont des plaques ovales ; - 1'unite de fixation comprend un element tubulaire qui s'etend a travers les deux pattes superieures et comprend un evidement defini dans une peripherie exterieure de celui-ci, une plaque de fixation est en prise avec 1'evidement et une vis s'etend a travers la plaque de fixation pour fixer le cable de frein entre la plaque de fixation et 1'evidement ; et - 1'element tubulaire presente une rainure definie dans une peripherie exterieure d'une extremite de celui-ci et un circlip est en prise avec la rainure pour positionner 1'element tubulaire.  Thus, the subject of the present invention is a bicycle brake mechanism comprising: a body intended to be situated above a front wheel, and a pivoting element pivotally connected to the body and adapted to be connected to a cable; brake, and - two brake levers disposed within the body and movably connected to the body by two tubes, each brake lever being provided with a brake pad connected thereto, the two tubes being in contact with each other; with the pivoting element so that the two brake levers are displaced when the pivoting element is pivotally actuated, two connecting units being pivotally connected to two ends of each of the brake levers and the body so that the two brake levers are moved simultaneously. According to preferred embodiments of the present invention: the body comprises a U-shaped element and two slots defined through an upper part of two ends of the body, two plates extending from the two ends of the body, two segments of the pivotally movable member extending through the two slots and each segment comprising an L-shaped end, two pins extending through the two L-shaped ends and two orifices provided in both. plates for pivotally connecting the pivoting element to the body; each of the brake levers has two first tabs extending from a first end thereof and two second tabs extending from a second end thereof, and the two tubes are respectively connected the second legs of the two brake levers and extend through two first holes extended defined through the two ends of the body; each of the connecting units comprises two first links and two second links, the first links having a first end pivotally connected to the first legs of each of the two brake levers, a second end of the first links being pivotally connected to the first links; linkages on the body, the second links have a first end pivotally connected to the second legs of each of the two brake levers, and a second end of the second links is pivotally connected to a hole opening in each of the two ends from the body ; - A through hole is defined in an upper part of the body and a connector is engaged with is débhhant hole, the connector being adapted to receive the brake cable; The pivoting element has two upper lugs in the middle of the latter and a fixing unit is connected to the two upper lugs, the fixing unit being adapted to connect one end of the brake cable; - An upper cover is mounted on the body and comprises two second elongated holes which are in alignment with the first elongated holes of the body, the tubes extend through the two second elongated holes; - two damping elements are connected to both ends of the body and are adapted to be in contact with the fork before each of the tubes present, an end cap connected to a distal end thereof; the two tubes are located on two respective horizontal sections of the L-shaped ends of the pivoting element; both pins each have an opening, and an elastic clip extends through the opening to prevent the pin from being pulled back through the two holes provided in the two body plates; a rod extends through the first end of each of the first links and the first legs of each of the brake levers to form a first pivoting part; a screw extends through the second end of each of the first links; a torsion spring, a support tube for receiving the torsion spring and connecting tabs at each end of the body and is connected to a nut so as to form a first positioning part, another rod is extends through the first end of each of the second links, the tube between the second legs and the second legs of each of the brake levers to form a second pivoting portion, another screw extends through the second end of each second links and the body exit hole and is connected to another nut to form a second positioning portion; the first two bonds and the second two bonds are oval plates; The fastening unit comprises a tubular element which extends through the two upper legs and comprises a recess defined in an outer periphery thereof, a fixing plate is engaged with the recess and a screw extends through the fixing plate to fix the brake cable between the fixing plate and the recess; and the tubular element has a groove defined in an outer periphery of one end thereof and a circlip engages with the groove to position the tubular element.

D'autres caracteristiques, details et avantages de 1'invention ressortiront a la lecture de la description detaillee qui suit, en reference a des exemples de realisation illustres par les dessins annexes qui representent respectivement : - la figure 1, en vue en eclate d'un mecanisme de frein conforme a la presente invention, - la figure 2, une vue en perspective du mecanisme de frein de la presente invention ; - la figure 3, une vue de cote du mecanisme de frein de la presente invention ; - la figure 4, une vue en perspective du dessous du mecanisme de frein de la presente invention ; - la figure 5, une vue de dessous du mecanisme de frein de la presente invention ; - la figure 6, une vue de face du mecanisme de 10 frein de la presente invention ; - la figure 7, une vue de cote montrant qu'un cable de frein n'est pas encore tire ; - la figure 8, une vue de cote montrant que le cable de frein est tire et des leviers de frein sont 15 deplaces, et - la figure 9, une vue de dessous representant des unites de liaison lorsque le cable de frein est tire. En faisant reference aux figures 1 a 7, le mecanisme de frein de bicyclette 1 de la presente 20 invention comprend un corps 10 en forme de U qui est situe au-dessus d'une roue avant. Un orifice debouchant 16 est defini dans une partie superieure du corps 10. Un connecteur 17 est en prise avec le trou debouchant 16 de sorte qu'un cable de frein B s'etend a 25 travers la fourche avant A, le connecteur 17, et le trou debouchant 16 afin d'etre relie a un element pivotant 20 qui sera decrit ci-apres. Deux fentes 11 sont definies a travers une partie superieure de deux extremites du corps 10, et deux premiers orifices 30 allonges 14 sont definis a travers un cote de chacune des deux extremites du corps 10. Deux plaques 15 s'etendent a partir de deux bords inferieurs respectifs des deux extremites du corps 10, et deux pattes de liaison 12 s'etendent a partir de chacune des deux extremites du corps 10 et sont situees de fagon opposee a la fourche avant A. Deux elements amortisseurs 18 sont relies aux deux extremites du corps 10 afin d'empecher un choc avec la fourche avant A. L'element pivotant 20 comprend deux segments 21 qui s'etendent de fagon mobile a travers les deux fentes 11, et chaque segment 21 comprend une extremite en forme de L. Deux goupilles 22 s'etendent a travers les deux extremites en forme de L et deux trous 151 amenages dans les deux plaques 15 pour relier de fagon pivotante 1'element pivotant 20 au corps 10. Les deux goupilles 22 presentent chacune une ouverture au travers de laquelle s'etend une agrafe elastique E pour empecher la goupille 22 d'etre tiree vers 1'arriere a travers les deux trous 151 des deux plaques 15 du corps 10. L'element pivotant 20 possede deux pattes superieures 23 au milieu de celui-ci et une unite de fixation est reliee aux deux pattes superieures 23. L'unite de fixation comprend un element tubulaire 24 qui s'etend a travers les deux pattes superieures 23 et qui comporte un evidement 242 defini dans une peripherie exterieure de celui-ci. L'element tubulaire 24 presente une rainure definie dans une peripherie exterieure d'une extremite de celui-ci et un circlip 241 s'engage dans la rainure pour positionner 1'element tubulaire 24. Une plaque de fixation 243 s'engage dans 1'evidement 242 et une vis 244 s'etend a travers la plaque de fixation 243 de fawn a fixer le cable de frein B entre la plaque de fixation 243 et 1'evidement 242. Deux leviers de frein 40 sont situes a 1'interieur du corps 10 et relies de fagon mobile au corps 10 par deux tubes 42. Chacun des leviers de frein 40 presente un patin de frein 41 relie a celui-ci, les deux patins de frein 41 etant situes sur deux cotes de la jante de roue. Les deux tubes 42 sont situes sur deux sections horizontales respectives des extremites en forme de L de 1'element pivotant 20 de sorte que les deux leviers de frein 40 sont deplaces lorsque 1'element pivotant 20 est actionne en pivotement. Chacun des leviers de frein 40 presente deux premieres pattes 401 s'etendant a partir d'une premiere extremite de celui-ci et deux secondes pattes 402 s'etendant a partir d'une seconde extremite de celui-ci. Les deux tubes 42 sont respectivement relies aux secondes pattes 402 des deux leviers de frein 40 et s'etendent a travers deux premiers trous allonges 14 definis a travers les deux extremites du corps 10. Chacun des tubes 42 presente un capuchon d'extremite 42a relie a une extremite distale de celui-ci pour s'assurer que les tubes 42 ne tombent pas depuis les premiers trous allonges 14 du corps 10. Deux unites de liaison sont reliees de fagon pivotante a deux extremites de chacun des leviers de frein 40 et du corps 10 de sorte que les deux leviers de frein 40 sont deplaces simultanement. Chacune des unites de liaison comprend deux premieres liaisons 51 et deux secondes liaisons 52, chacune des premieres et secondes liaisons 52 etant des plaques ovales. Les premieres liaisons 51 presentent une premiere extremite reliee de fagon pivotante aux premieres pattes 401 de chacun des deux leviers de frein 40, une seconde extremite des premieres liaisons 51 etant reliee de fagon pivotante aux pattes de liaison 12 du corps 10.  Other features, details and advantages of the invention will become apparent on reading the detailed description which follows, with reference to exemplary embodiments illustrated by the attached drawings which respectively show: FIG. 1, in a diagrammatic view a brake mechanism according to the present invention; - Figure 2 is a perspective view of the brake mechanism of the present invention; - Figure 3, a side view of the brake mechanism of the present invention; - Figure 4, a perspective view from below of the brake mechanism of the present invention; - Figure 5, a bottom view of the brake mechanism of the present invention; FIG. 6, a front view of the brake mechanism of the present invention; - Figure 7, a side view showing that a brake cable is not yet drawn; Fig. 8 is a side view showing that the brake cable is pulled and brake levers are displaced, and Fig. 9 is a bottom view showing connecting units when the brake cable is pulled. Referring to FIGS. 1 to 7, the bicycle brake mechanism 1 of the present invention comprises a U-shaped body 10 which is located above a front wheel. A through hole 16 is defined in an upper part of the body 10. A connector 17 is engaged with the through hole 16 so that a brake cable B extends through the front fork A, the connector 17, and the through hole 16 to be connected to a pivoting element 20 which will be described below. Two slots 11 are defined through an upper part of two ends of the body 10, and two first extended orifices 14 are defined across one side of each of the two ends of the body 10. Two plates 15 extend from two edges respective lower ends of the two ends of the body 10, and two connecting lugs 12 extend from each of the two ends of the body 10 and are located opposite to the front fork A. Two damping elements 18 are connected to both ends of the body 10 to prevent shock with the front fork A. The pivoting member 20 comprises two segments 21 which extend in a movable manner through the two slots 11, and each segment 21 comprises an L-shaped end. pins 22 extend through the two L-shaped ends and two holes 151 are arranged in the two plates 15 to pivotally connect the pivoting element 20 to the body 10. The two pins 22 each have an opening at through which an elastic clip E extends to prevent the pin 22 from being pulled backward through the two holes 151 of the two plates 15 of the body 10. The pivoting element 20 has two upper legs 23 in the middle of it and a fixing unit is connected to the two upper legs 23. The fastening unit comprises a tubular element 24 which extends through the two upper legs 23 and has a recess 242 defined in a periphery external to that -this. The tubular element 24 has a groove defined in an outer periphery of one end thereof and a circlip 241 engages in the groove to position the tubular element 24. A fastening plate 243 engages in 1 ' 242 and a screw 244 extends through the attachment plate 243 so as to fix the brake cable B between the fixing plate 243 and the recess 242. Two brake levers 40 are located inside the body 10 and movably connected to the body 10 by two tubes 42. Each of the brake levers 40 has a brake pad 41 connected thereto, the two brake pads 41 being located on two sides of the wheel rim. The two tubes 42 are located on two respective horizontal sections of the L-shaped ends of the pivot element 20 so that the two brake levers 40 are displaced when the pivoting element 20 is pivotally actuated. Each of the brake levers 40 has two first tabs 401 extending from a first end thereof and two second tabs 402 extending from a second end thereof. The two tubes 42 are respectively connected to the second tabs 402 of the two brake levers 40 and extend through two first elongated holes 14 defined through the two ends of the body 10. Each of the tubes 42 has an end cap 42a connects has a distal end thereof to ensure that the tubes 42 do not fall from the first elongated holes 14 of the body 10. Two connecting units are pivotally connected to two ends of each of the brake levers 40 and body 10 so that the two brake levers 40 are simultaneously displaced. Each of the link units comprises two first links 51 and two second links 52, each of the first and second links 52 being oval plates. The first links 51 have a first end pivotally connected to the first tabs 401 of each of the two brake levers 40, a second end of the first links 51 being pivotally connected to the connecting tabs 12 of the body 10.

Les secondes liaisons 52 presentent une premiere extremite reliee de fagon pivotante aux secondes pattes 402 de chacun des deux leviers de frein 40, une seconde extremite des secondes liaisons 52 etant reliee de fagon pivotante a un orifice debouchant 13 de chacune des deux extremites du corps 10. Une tige 53 s'etend a travers la premiere extremite de chacune des premieres liaisons 51 et a travers les premieres pattes 401 de chacun des leviers de frein 40 pour former une premiere partie pivotante C.  The second links 52 have a first end pivotally connected to the second lugs 402 of each of the two brake levers 40, a second end of the second links 52 being pivotally connected to a through opening 13 of each of the two ends of the body 10. A rod 53 extends through the first end of each of the first links 51 and through the first legs 401 of each of the brake levers 40 to form a first pivoting portion C.

Une vis 56 s'etend a travers la seconde extremite de chacune des premieres liaisons 51, un ressort de torsion 54, un tube de support 55 pour recevoir le ressort de torsion 54 et les pattes de liaison 12 de chaque extremite du corps 10, ladite vis 56 etant reliee a un ecrou 57 de fagon a former une premiere partie de positionnement D. Une autre tige 53 s'etend a travers la premiere extremite de chacune des secondes liaisons 52, le tube 42 situe entre les secondes pattes 402 et les secondes pattes 402 de chacun des leviers de frein 40 pour former une seconde partie pivotante Cl. Une autre vis 56 s'etend a travers la seconde extremite de chacune des secondes liaisons 52 et le trou debouchant 13 du corps 10, ladite vis 56 etant reliee a un ecrou 57 de fagon a former une seconde partie de positionnement Dl.  A screw 56 extends through the second end of each of the first links 51, a torsion spring 54, a support tube 55 for receiving the torsion spring 54 and the connecting lugs 12 of each end of the body 10, said screw 56 being connected to a nut 57 so as to form a first positioning portion D. Another rod 53 extends through the first end of each of the second links 52, the tube 42 located between the second legs 402 and the second tabs 402 of each of the brake levers 40 to form a second pivoting portion Cl. Another screw 56 extends through the second end of each of the second links 52 and the through hole 13 of the body 10, said screw 56 being connected to a a nut 57 to form a second positioning portion Dl.

Un couvercle superieur 60 est monte sur le corps 10 et comprend deux seconds trous allonges 61 qui sont en alignement avec les premiers trous allonges 14 du corps 10, les tubes 42 s'etendent a travers les deux seconds trous allonges 61. En faisant reference aux figures 8 et 9, lorsque le cable de frein B est tire, 1'element pivotant 20 est actionne en pivotement autour des deux goupilles 22 et les deux tubes 42 des deux leviers de frein 40 sont tires par les deux segments 21 de 1'element pivotant 20 a partir d'une premiere position, comme cela est represents sur la figure 7, jusqu'a une seconde position, comme cela est represents sur la figure 8. Les premieres et secondes liaisons 51 et 52 pivotent autour des premiere et seconde parties pivotantes C et Cl et les deux leviers de frein 40 sont deplaces vers 1'interieur pour arreter la jante de roue. Les premieres et secondes liaisons 51 et 52 sont situees symetriquement par rapport a la jante de roue de sorte que les deux patins de frein 41 des leviers de frein 40 entrent simultanement en contact avec la jante de roue. I1 est note que les ressorts de torsion 54 ont chacun une premiere extremite reliee au corps 10 et 1'autre extremite du ressort de torsion 54 est reliee au tube de support 55. Lorsque le cable de frein B est relache, les leviers de frein 40 sont deplaces jusqu'a leurs positions d'origine par les ressorts de torsion 54. Le cable de frein B s'etend a travers la fourche avant A de sorte que la longueur du cable de frein B qui est exposee est rsduite et le defaut, qui survient lorsque le cable de frein s'emmele avec des objets, peut titre reduit efficacement. Bien que nous ayons montre et decrit le mode de realisation selon la presente invention, it doit titre evident pour 1'homme du metier que d'autres modes de realisation peuvent titre mis en oeuvre sans s'eloigner de la portee de la presente invention.  An upper cover 60 is mounted on the body 10 and includes two second elongate holes 61 which are in alignment with the first elongate holes 14 of the body 10, the tubes 42 extend through the two second elongated holes 61. Referring to 8 and 9, when the brake cable B is pulled, the pivoting element 20 is pivoted around the two pins 22 and the two tubes 42 of the two brake levers 40 are pulled by the two segments 21 of 1'element pivoting from a first position, as shown in Fig. 7, to a second position, as shown in Fig. 8. First and second links 51 and 52 pivot about the first and second portions Pivot C and Cl and the two brake levers 40 are moved inward to stop the wheel rim. The first and second links 51 and 52 are located symmetrically with respect to the wheel rim so that the two brake pads 41 of the brake levers 40 come into simultaneous contact with the wheel rim. It is noted that the torsion springs 54 each have a first end connected to the body 10 and the other end of the torsion spring 54 is connected to the support tube 55. When the brake cable B is released, the brake levers 40 are moved to their original positions by the torsion springs 54. The brake cable B extends through the front fork A so that the length of the brake cable B which is exposed is reduced and the defect, which occurs when the brake cable gets entangled with objects, can effectively reduce it. Although we have shown and described the embodiment according to the present invention, it should be obvious to those skilled in the art that other embodiments may be implemented without departing from the scope of the present invention.

Claims (15)

REVENDICATIONS 1. Mecanisme de frein de bicyclette, caracterise en ce qu'il comprend : -un corps (10) prevu pour etre situe au-dessus d'une roue avant et un element pivotant (20) relict de fagon pivotante au corps (10) et adapte pour etre relict a un cable de frein (B), et - deux leviers de frein (40) disposes a 1'interieur du corps (10) et relies de fagon mobile au corps (10) par deux tubes (42), chaque levier de frein etant muni d'un Patin de frein (41) relict a celui-ci, les deux tubes (42) etant en contact avec 1'element pivotant (20) de sorte que les deux leviers de frein (40) sont deplaces lorsque 1'element pivotant (20) est actionne en pivotement, deux unites de liaison etant reliees de fagon pivotante a deux extremites de chacun des leviers de frein (40) et du corps (10) de sorte que les deux leviers de frein (40) sont deplaces simultanement.  Bicycle brake mechanism, characterized in that it comprises: a body (10) intended to be situated above a front wheel and a pivoting element (20) pivotally relatable to the body (10). and adapted to be relict to a brake cable (B), and - two brake levers (40) disposed within the body (10) and movably connected to the body (10) by two tubes (42), each brake lever being provided with a brake shoe (41) relict thereto, the two tubes (42) being in contact with the pivoting element (20) so that the two brake levers (40) are when the pivoting element (20) is pivotally actuated, two connecting units are pivotally connected to two ends of each of the brake levers (40) and the body (10) so that the two brake levers ( 40) are moved simultaneously. 2. Mecanisme selon la revendication 1, caracterise en ce que le corps (10) comprend un element en forme de U et deux fentes (11) definies a travers une partie superieure de deux extremites du corps (10), deux plaques (15) s'etendant a partir des deux extremites du corps (10), deux segments (21) de 1'element pivotant (20) s'etendant de fagon mobile a travers les deux fentes (11) et chaque segment (21) comprenant une extremite en forme de L, deux goupilles (22) s'etendant au travers des deux extremites en forme de L et de deux orifices (151) prevus dans les deux plaques (15) pourrelier de fawn pivotante 1'element pivotant (20) au corps (10).  2. Mechanism according to claim 1, characterized in that the body (10) comprises a U-shaped element and two slots (11) defined through an upper part of two ends of the body (10), two plates (15). extending from both ends of the body (10), two segments (21) of the pivotal element (20) extending in a movable manner through the two slots (11) and each segment (21) comprising an end in the form of an L, two pins (22) extending through the two L-shaped ends and two orifices (151) provided in the two plates (15) for pivotally rotating the pivot element (20) to the body; (10). 3. Mecanisme selon la revendication 1, caracterise en ce que chacun des leviers de frein (40) presente deux premieres pattes (401) s'etendant a partir d'une premiere extremite de celui-ci et deux secondes pattes (402) s'etendant a partir d'une seconde extremite de celui-ci, et en ce que les deux tubes (42) sont respectivement relies aux secondes pattes (402) des deux leviers de frein (40) et s'etendent a travers deux premiers trous allonges (14) definis a travers les deux extremites du corps (10).  3. Mechanism according to claim 1, characterized in that each of the brake levers (40) has two first tabs (401) extending from a first end thereof and two second tabs (402) s' extending from a second end thereof, and in that the two tubes (42) are respectively connected to the second legs (402) of the two brake levers (40) and extend through two first extended holes (14) defined through both ends of the body (10). 4. Mecanisme selon la revendication 3, caracterise en ce que chacune des unites de liaison comprend deux premieres liaisons (51) et deux secondes liaisons (52), les premieres liaisons (51) presentant une premiere extremite reliee de fagon pivotante aux premieres pattes (401) de chacun des deux leviers de frein (40), une seconde extremite des premieres liaisons (51) etant reliee de fagon pivotante a des pattes de liaison (12) sur le corps (10), les secondes liaisons (52) presentant une premiere extremite reliee de fagon pivotante aux secondes pattes (402) de chacun des deux leviers de frein (40), et une seconde extremite des secondes liaisons (52) etant reliee de fagon pivotante a un trou debouchant (13) dans chacune des deux extremites du corps (10).  4. Mechanism according to claim 3, characterized in that each of the connecting units comprises two first links (51) and two second links (52), the first links (51) having a first end pivotally connected to the first legs ( 401) of each of the two brake levers (40), a second end of the first links (51) being pivotally connected to connecting tabs (12) on the body (10), the second links (52) having a first end pivotally connected to the second legs (402) of each of the two brake levers (40), and a second end of the second links (52) being pivotally connected to a through hole (13) in each of the two ends of the body (10). 5. Mecanisme selon la revendication 1, caracterise en ce qu'un trou debouchant (16) est defini clans une partie superieure du corps (10) et en ce qu'un connecteur (17) est en prise avec le trou debouchant(16), le connecteur (17) etant adapte pour recevoir le cable de frein (B).  5. Mechanism according to claim 1, characterized in that a through hole (16) is defined in an upper part of the body (10) and in that a connector (17) is engaged with the through hole (16) , the connector (17) being adapted to receive the brake cable (B). 6. Mecanisme selon la revendication 1, caracterise en ce que 1'element pivotant (20) presente deux pattes superieures (23) au milieu de celui-ci et en ce qu'une unite de fixation est reliee aux deux pattes superieures (23), 1'unite de fixation etant adaptee pour relier une extremite du cable de frein (B).  6. Mechanism according to claim 1, characterized in that the pivoting element (20) has two upper tabs (23) in the middle thereof and in that a fixing unit is connected to the two upper legs (23). The fixing unit being adapted to connect one end of the brake cable (B). 7. Mecanisme selon la revendication 3, caracterise en ce qu'un couvercle superieur (60) est monte sur le corps (10) et comprend deux seconds trous allonges (61) qui sont en alignement avec les premiers trous allonges (14) du corps (10), les tubes (42) s'etendent a travers les deux seconds trous allonges (61).  7. Mechanism according to claim 3, characterized in that a top cover (60) is mounted on the body (10) and comprises two second elongate holes (61) which are in alignment with the first elongated holes (14) of the body (10), the tubes (42) extend through the two second elongated holes (61). 8. Mecanisme selon la revendication 1, caracterise en ce que deux elements amortisseurs (18) sont relies aux deux extremites du corps (10) et sont adaptes pour etre en contact avec la fourche avant.  8. Mechanism according to claim 1, characterized in that two damping elements (18) are connected to both ends of the body (10) and are adapted to be in contact with the front fork. 9. Mecanisme selon la revendication 1, caracterise en ce que chacun des tubes (42) presente un capuchon d'extremite (42a) relie a une extremite distale de celui-ci.  9. Mechanism according to claim 1, characterized in that each of the tubes (42) has an end cap (42a) connected to a distal end thereof. 10. Mecanisme selon la revendication 2, caracterise en ce que les deux tubes (42) sont situes sur deux sections horizontales respectives des extremites en forme de L de 1'element pivotant (20).  10. Mechanism according to claim 2, characterized in that the two tubes (42) are located on two respective horizontal sections of the L-shaped ends of the pivoting element (20). 11. Mecanisme selon la revendication 2, caracterise en ce que les deux goupilles (22) presentent chacune une ouverture, et en ce qu'une agrafe elastique(E) s'etend a travers 1'ouverture pour empecher la goupille d'etre tiree vers 1'arriere atravers les deux trous (14) amenages clans les deux plaques (15) du corps (10).  11. Mechanism according to claim 2, characterized in that the two pins (22) each have an opening, and in that an elastic clip (E) extends through the opening to prevent the pin from being pulled. rearwardly through the two holes (14) provided in the two plates (15) of the body (10). 12. Mecanisme selon la revendication 4, caracterise en ce qu'une tige (53) s'etend a travers la premiere extremite de chacune des premieres liaisons (51) et les premieres pattes (401) de chacun des leviers de frein (40) pour former une premiere partie pivotante (C), une vis (56) s'etendant au travers de la seconde extremite de chacune des premieres liaisons (51), d'un ressort de torsion (54), d'un tube de support (55) pour recevoir le ressort de torsion (54) et des pattes de liaison (12) de chaque extremite du corps (10) et etant reliee a un ecrou (57) de fagon a former une premiere partie de positionnement (D), une autre tige (53) s'etendant a travers la premiere extremite de chacune des secondes liaisons (52), le tube (42) entre les secondes pattes (402) et les secondes pattes (402) de chacun des leviers de frein (40) pour former une seconde partie pivotante (Cl), une autre vis (56) s'etendant a travers la seconde extremite de chacune des secondes liaisons (52) et le trou debouchant (13) du corps (10) et etant reliee a un autre ecrou (57) de fagon a former une seconde partie de positionnement (D1).  12. Mechanism according to claim 4, characterized in that a rod (53) extends through the first end of each of the first links (51) and the first lugs (401) of each of the brake levers (40). for forming a first pivoting portion (C), a screw (56) extending through the second end of each of the first links (51), a torsion spring (54), a support tube ( 55) for receiving the torsion spring (54) and connecting lugs (12) from each end of the body (10) and being connected to a nut (57) to form a first positioning portion (D), a another rod (53) extending through the first end of each of the second links (52), the tube (42) between the second legs (402) and the second legs (402) of each of the brake levers (40) to form a second pivoting portion (C1), another screw (56) extending through the second end of each of the second links (52) and the through hole (13) of the body (10) and being connected to another nut (57) to form a second positioning portion (D1). 13. Mecanisme selon la revendication 4, caracterise en ce que les deux premieres liaisons (51) et les deux secondes liaisons (52) sont des plaques ovales.  13. Mechanism according to claim 4, characterized in that the two first links (51) and the second two links (52) are oval plates. 14. Mecanisme selon la revendication 6, caracterise en ce que 1'unite de fixation comprend un element tubulaire (24) qui s'etend a travers les deuxpattes superieures (23) et comprend un evidement (242) defini dans une peripherie exterieure de celui-ci, une plaque de fixation (243) etant en prise avec 1'evidement (242) et une vis (244) s'etendant a travers la plaque de fixation (243) pour fixer le cable de frein (B) entre ' la plaque de fixation (243) et l'evidement (242).  14. Mechanism according to claim 6, characterized in that the fixing unit comprises a tubular element (24) which extends through the two upper legs (23) and comprises a recess (242) defined in a periphery external to that there being a fastening plate (243) engaging the recess (242) and a screw (244) extending through the fastening plate (243) to secure the brake cable (B) between the fixing plate (243) and the recess (242). 15. Mecanisme selon la revendication 14, caracterise en ce que l'element tubulaire (24) presente une rainure definie dans une peripherie exterieure d'une extremite de celui-ci, et en ce qu'un circlip (241) est en prise avec la rainure pour positionner 1'element tubulaire (24).  15. Mechanism according to claim 14, characterized in that the tubular element (24) has a groove defined in an outer periphery of one end thereof, and in that a circlip (241) engages with the groove for positioning the tubular element (24).
FR0512946A 2005-12-20 2005-12-20 BICYCLE BRAKE MECHANISM Expired - Fee Related FR2894930B3 (en)

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FR0512946A FR2894930B3 (en) 2005-12-20 2005-12-20 BICYCLE BRAKE MECHANISM

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FR2894930B3 FR2894930B3 (en) 2007-12-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009124494A1 (en) * 2008-04-08 2009-10-15 Huang Tan-Cheng An antilock brake structure
FR2989950A1 (en) * 2012-04-25 2013-11-01 Decathlon Sa Remote braking device for e.g. bicycle, has distal end cooperating with wheel side in braking position such that longitudinal direction of movable shoe is directed opposite to rotation direction of wheel when bicycle runs forwards

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009124494A1 (en) * 2008-04-08 2009-10-15 Huang Tan-Cheng An antilock brake structure
CN101554868B (en) * 2008-04-08 2012-05-30 黄潭城 Anti-lock brake structure
FR2989950A1 (en) * 2012-04-25 2013-11-01 Decathlon Sa Remote braking device for e.g. bicycle, has distal end cooperating with wheel side in braking position such that longitudinal direction of movable shoe is directed opposite to rotation direction of wheel when bicycle runs forwards

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