FR2769887A3 - Bicycle frame - Google Patents

Bicycle frame Download PDF

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Publication number
FR2769887A3
FR2769887A3 FR9713103A FR9713103A FR2769887A3 FR 2769887 A3 FR2769887 A3 FR 2769887A3 FR 9713103 A FR9713103 A FR 9713103A FR 9713103 A FR9713103 A FR 9713103A FR 2769887 A3 FR2769887 A3 FR 2769887A3
Authority
FR
France
Prior art keywords
tube
curved
bicycle frame
head
present
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR9713103A
Other languages
French (fr)
Other versions
FR2769887B3 (en
Inventor
Yen Pin Lai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR9713103A priority Critical patent/FR2769887B3/en
Publication of FR2769887A3 publication Critical patent/FR2769887A3/en
Application granted granted Critical
Publication of FR2769887B3 publication Critical patent/FR2769887B3/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62KCYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K19/00Cycle frames
    • B62K19/18Joints between frame members
    • B62K19/20Joints between frame members welded, soldered, or brazed

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Cycles, And Cycles In General (AREA)

Abstract

The frame is made up of a head tube (1) and a curved tube (2). The curved tube is formed from a single piece as an upper section (1A) and a section directed towards the base. The curved tube has an opening formed in it at the junction between the upper section and the section directed towards the base. The head tube is fixed into this opening. The opening is curved in shape and the head tube is affixed into it by welding.

Description

DOMAINE DE L'INVENTION
La présente invention concerne d'une façon générale une bicyclette et, plus particulièrement, un cadre de bicyclette.
FIELD OF THE INVENTION
The present invention relates generally to a bicycle and, more particularly, to a bicycle frame.

ARRIERE PLAN DE L'INVENTION
Comme représenté à la figure 1, le cadre de bicyclette conventionnel est constitué principalement d'un tube de tête A, d'un tube supérieur B et d'un tube dirigé vers le bas C. Le tube supérieur B et le tube dirigé vers le bas C sont fixés au tube de tête A par soudure. Pour renforcer l'effet de fixation du cadre de bicyclette, le tube dirigé vers le bas C est muni de deux pièces de renforcement D qui sont placées à la jonction entre le tube de tête A et le tube dirigé vers le bas C, comme représenté à la figure 2. De plus, le tube supérieur B et le tube dirigé vers le bas C sont munis, entre eux, d'un bloc de renforcement E en forme de U inversé, comme représenté à la figure 3.
BACKGROUND OF THE INVENTION
As shown in Figure 1, the conventional bicycle frame consists mainly of a head tube A, an upper tube B and a tube directed downwards C. The upper tube B and the tube directed towards the bottom C are fixed to the head tube A by welding. To strengthen the fixing effect of the bicycle frame, the downwardly directed tube C is provided with two reinforcing parts D which are placed at the junction between the head tube A and the downwardly directed tube C, as shown in FIG. 2. In addition, the upper tube B and the tube directed downwards C are provided, between them, with a reinforcement block E in the shape of an inverted U, as shown in FIG. 3.

Ce cadre de bicyclette conventionnel tel que décrit ci-dessus, est de conception imparfaite en ce que l'alignement du tube supérieur B et du tube dirigé vers le bas C par rapport au tube de tête A, ne peut être effectué facilement lorsqu'on fixe le tube supérieur B et le tube dirigé vers le bas C au tube de tête A par soudure. De plus, le cadre de bicyclette conventionnel n'a pas une structure solide compte tenu du fait que le tube supérieur B et le tube dirigé vers le bas C ne sont pas fixés de façon solide au tube de tête A par soudure, du fait que les surfaces soudées sont petites. Enfin, les additions des pièces de renforcement D et du bloc de renforcement E au cadre de bicyclette conventionnel, comme représenté aux figures 2 et 3, détériorent l'aspect esthétique du cadre de bicyclette conventionnel, et conduisent à une augmentation du coût de fabrication de ce cadre de bicyclette. This conventional bicycle frame as described above, is of imperfect design in that the alignment of the upper tube B and the tube directed downwards C relative to the head tube A, cannot be easily carried out when fixes the upper tube B and the tube directed downwards C to the head tube A by welding. In addition, the conventional bicycle frame does not have a solid structure in view of the fact that the upper tube B and the tube directed downwards C are not securely fixed to the head tube A by welding, since the welded surfaces are small. Finally, the additions of the reinforcement pieces D and of the reinforcement block E to the conventional bicycle frame, as shown in FIGS. 2 and 3, deteriorate the aesthetic appearance of the conventional bicycle frame, and lead to an increase in the manufacturing cost of this bicycle frame.

RESUME DE L'INVENTION
Le principal but de la présente invention est donc de créer un cadre de bicyclette qui ne présente pas les inconvénients du cadre de bicyclette selon l'art antérieur décrit ci-dessus.
SUMMARY OF THE INVENTION
The main object of the present invention is therefore to create a bicycle frame which does not have the drawbacks of the bicycle frame according to the prior art described above.

A cet effet, la présente invention concerne un cadre de bicyclette constitué d'un tube de tête et d'un tube courbé. Le tube courbé est formé d'une seule pièce par un tube supérieur et un tube dirigé vers le bas. Le tube courbé est muni, à la jonction du tube supérieur avec le tube dirigé vers le bas, d'un évidement courbe destiné à fixer le tube courbé au tube de tête par soudure. Une grande surface soudée est fournie par l'évidement courbe du tube courbé, ce qui permet de s'assurer que le tube courbé soit fixé solidement au tube de tête. To this end, the present invention relates to a bicycle frame consisting of a head tube and a curved tube. The curved tube is formed in one piece by an upper tube and a tube directed downwards. The curved tube is provided, at the junction of the upper tube with the tube directed downwards, with a curved recess intended to fix the curved tube to the head tube by welding. A large welded surface is provided by the curved recess of the curved tube, which ensures that the curved tube is securely attached to the head tube.

Suivant d'autres caractéristiques de l'invention - le cadre comprend un tube de tête ; et
un tube courbé formé d'une seule pièce par un tube supé
rieur et un tube dirigé vers le bas, ce tube courbé étant
muni d'un évidement situé à la jonction du tube supérieur
avec le tube dirigé vers le bas, pour fixer le tube courbé
au tube de tête, - l'évidement est de forme courbe.
According to other features of the invention - the frame comprises a head tube; and
a curved tube formed in one piece by a superior tube
laughing and a tube directed downwards, this curved tube being
provided with a recess located at the junction of the upper tube
with the tube pointing downwards, to fix the curved tube
at the head tube, - the recess is curved.

BREVE DESCRIPTION DES DESSINS
La présente invention sera décrite ci-après de manière plus détaillée à l'aide d'un mode de réalisation représenté sur les dessins annexés dans lesquels - la figure 1 représente une vue en perspective d'un cadre de
bicyclette selon l'art antérieur - la figure 2 représente une autre vue en perspective du ca
dre de bicyclette selon l'art antérieur - la figure 3 représente une autre vue en perspective encore
du cadre de bicyclette selon l'art antérieur - la figure 4 représente une vue éclatée d'un cadre de bicy
clette selon la présente invention - la figure 5 représente une vue de côté de la présente in
vention, en combinaison - la figure 6 représente une vue de face de la présente in
vention, en combinaison ; et - la figure 7 représente une vue en perspective du cadre de
bicyclette de la présente invention.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be described below in more detail using an embodiment shown in the accompanying drawings in which - Figure 1 shows a perspective view of a frame
bicycle according to the prior art - Figure 2 shows another perspective view of the ca
bicycle dre according to the prior art - Figure 3 shows yet another perspective view
of the bicycle frame according to the prior art - Figure 4 shows an exploded view of a bicycles frame
clette according to the present invention - Figure 5 shows a side view of the present in
vention, in combination - Figure 6 shows a front view of the present in
vention, in combination; and - Figure 7 shows a perspective view of the frame
bicycle of the present invention.

DESCRIPTION DETAILLEE DU MODE DE REALISATION
Comme illustré aux figures 4 à 7, un cadre de bicyclette la concrétisé par la présente invention est constitué principalement d'un tube de tête 1 et d'un tube courbé 2 qui est fixé au tube de tête 1.
DETAILED DESCRIPTION OF THE EMBODIMENT
As illustrated in FIGS. 4 to 7, a bicycle frame embodied by the present invention consists mainly of a head tube 1 and a curved tube 2 which is fixed to the head tube 1.

Le tube courbé 2 est formé d'une seule pièce par un tube supérieur et un tube dirigé vers le bas, ce tube courbé 2 étant muni, à la jonction du tube supérieur avec le tube dirigé vers le bas, d'un évidement courbe 21 destiné à fixer le tube courbé 2 au tube de tête 1 par soudure, comme illustré par une ligne de soudure 3. The curved tube 2 is formed in one piece by an upper tube and a tube directed downwards, this curved tube 2 being provided, at the junction of the upper tube with the tube directed downwards, with a curved recess 21 intended to fix the curved tube 2 to the head tube 1 by welding, as illustrated by a welding line 3.

Le tube courbé 2 est fixé solidement au tube de tête 1 grâce à l'évidement courbe 21 qui fournit une grande surface soudée. A l'inverse du cadre de bicyclette selon l'art antérieur, le cadre de bicyclette de la présente invention ne pose pas de problème d'alignement. De plus, le cadre de bicyclette de la présente invention est débarrassé de la pièce ou bloc de renforcement. Par suite, le cadre de bicyclette de la présente invention présente une structure solide, et ce cadre est bon marché à fabriquer. L'innovation de conception de la présente invention est obtenue sans détériorer l'aspect esthétique du cadre de bicyclette.  The curved tube 2 is securely attached to the head tube 1 through the curved recess 21 which provides a large welded surface. Unlike the bicycle frame according to the prior art, the bicycle frame of the present invention poses no alignment problem. In addition, the bicycle frame of the present invention is freed from the reinforcement piece or block. As a result, the bicycle frame of the present invention has a solid structure, and this frame is inexpensive to manufacture. The design innovation of the present invention is obtained without deteriorating the aesthetic appearance of the bicycle frame.

Claims (1)

REVENDICATIONS 10) Cadre de bicyclette (lA), caractérisé en ce qu' il comprend un tube de tête (1) ; et un tube courbé (2) formé d'une seule pièce par un tube supérieur et un tube dirigé vers le bas, ce tube courbé étant muni d'un évidement (12) situé à la jonction du tube supérieur avec le tube dirigé vers le bas, pour fixer le tube courbé (2) au tube de tête (1). 2") Cadre de bicyclette selon la revendication 1, caractérisé en ce que l'évidement (12) est de forme courbe.CLAIMS 10) Bicycle frame (1A), characterized in that it comprises a head tube (1); and a curved tube (2) formed in one piece by an upper tube and a tube directed downwards, this curved tube being provided with a recess (12) located at the junction of the upper tube with the tube directed towards the bottom, to fix the curved tube (2) to the head tube (1). 2 ") Bicycle frame according to claim 1, characterized in that the recess (12) is of curved shape. 30) Cadre de bicyclette selon la revendication 1, caractérisé en ce que l'évidement (12) du tube courbé (2) est fixé au tube de tête (1) par soudure. 30) Bicycle frame according to claim 1, characterized in that the recess (12) of the curved tube (2) is fixed to the head tube (1) by welding.
FR9713103A 1997-10-20 1997-10-20 BICYCLE FRAME Expired - Fee Related FR2769887B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9713103A FR2769887B3 (en) 1997-10-20 1997-10-20 BICYCLE FRAME

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9713103A FR2769887B3 (en) 1997-10-20 1997-10-20 BICYCLE FRAME

Publications (2)

Publication Number Publication Date
FR2769887A3 true FR2769887A3 (en) 1999-04-23
FR2769887B3 FR2769887B3 (en) 1999-08-27

Family

ID=9512418

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9713103A Expired - Fee Related FR2769887B3 (en) 1997-10-20 1997-10-20 BICYCLE FRAME

Country Status (1)

Country Link
FR (1) FR2769887B3 (en)

Also Published As

Publication number Publication date
FR2769887B3 (en) 1999-08-27

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