ALPINE BICYCLE

Description

Technical area

[0001] The present invention relates to a bicycle for downhill riding and a method for providing a bicycle for downhill riding. Background of the invention

[0002] It's common practice to design bicycles, so-called mountain bikes, for off-road riding, especially in the mountains. Downhill riding is very popular, and very high speeds can be achieved. To provide sufficient robustness and comfort, mountain bikes feature large frames and complex suspension and braking systems. This results in mountain bikes being extremely complex and heavy. For this reason, mountain bikes are less suitable for transport by hikers or climbers over rough terrain.

[0003] Document DE 44 46 112 A1 discloses the features of the preamble of claim 1. Description of the invention

[0004] It is an object of the present invention to provide a lightweight downhill bicycle which is particularly suitable for hiking and climbing.

[0005] This object is achieved with a bicycle for downhill riding and a method for providing a bicycle for downhill riding according to the subject matters of the independent claims.

[0006] According to a first aspect of the present invention, a bicycle for downhill riding is described. The bicycle has a front wheel portion, a rear wheel portion, and a support bar that couples the front wheel portion and the rear wheel portion to each other. The support bar has at least one joint for extending and folding the support bar. The support bar has a front bar portion between the front wheel portion and the joint, and a rear bar portion between the rear wheel portion and the joint.

[0007] The bicycle further comprises a foot bar pivotally attached to the support bar by a coupling portion. The foot bar has a footrest area on a foot section opposite the coupling portion for resting the feet of a bicycle user.

[0008] Furthermore, the bicycle has a tensioning cable system with a first cable tensioning section and a second cable tensioning section, wherein the first cable tensioning section is coupled to the foot section and the front bar section and the second cable tensioning section is coupled to the foot section and the rear bar section such that when a weight force is exerted on the foot section, the foot bar can be aligned in the direction of the weight force and the tensioning cable system can be tensioned.

[0009] According to a further aspect of the present invention, a method for providing a bicycle for downhill riding as described above is provided. The method comprises extending and folding the support bar and pivoting the foot bar so that a weight force can be exerted on the foot portion of the foot bar to align the foot bar in the direction of the weight force and tension the tensioning cable system.

[0010] The bicycle according to the invention is designed, in particular, to be lightweight and simple, allowing it to be easily and effortlessly carried by a user in a folded state. In an unfolded state, i.e., in an active operating state, the user can stand on the bicycle and ride downhill. The bicycle according to the invention, in particular, provides a simple system that nevertheless provides a bicycle that is robust for downhill riding.

[0011] The support rod can be made of a lightweight material, such as aluminum, or a fiber composite material, such as a carbon fiber composite or a glass fiber composite. Furthermore, the support rod can consist of a hollow profile.

[0012] The joint is provided, for example, by means of a pivot pin, which forms a pivot axis for at least the front rod section or the rear rod section along its direction of extension. Additional rod sections, such as the center rod section described below, can be inserted between the front rod section and the rear rod section. For example, the front rod section can be attached directly to the rear rod section via the joint. In this case, the joint can, for example, have two pivot pins, wherein the front rod section is rotatable about a first pivot pin and the rear rod section is rotatable about a second pivot pin. The first and second pivot pins can form pivot axes that are parallel to one another or skewed or not parallel to one another.

[0013] According to an exemplary embodiment, the joint has a bearing sleeve which is designed such that the support rod is articulated for folding and unfolding,

[0014] According to an exemplary embodiment, at least the first cable tensioning section or the second cable tensioning section is fastened inside the bearing sleeve or extends partially through the bearing sleeve.

[0015] According to an exemplary embodiment, the cable tensioning system has a third cable tensioning section which runs along a top side and is fastened to the support rod on opposite sides with respect to the joint, wherein the third tensioning cable section is configured such that it generates a torque about the joint by tensioning against the torque which can be generated by the first tensioning cable section and the second tensioning cable section.

[0016] According to an exemplary embodiment, the bicycle has a quick release which releasably fixes the third tensioning cable section to the support bar.

[0017] According to an exemplary embodiment, the bicycle has a brake lever pivotally attached to the rear rod portion such that the brake lever is pivotable toward the rear wheel and can be coupled to the rear wheel in a locking position such that further rotation of the rear wheel can be prevented.

[0018] The joint can thus be designed with a bearing sleeve or as a hollow axle. For example, the bearing sleeve can be rotatably attached to the front rod section. The front rod section can have a fork shape at the joint and partially enclose the bearing sleeve or have a corresponding opening and completely enclose the bearing sleeve. Furthermore, the other connection partners, such as the center rod section or the rear rod section, are coupled to the bearing sleeve. The front rod section on the one hand or the center rod section or the rear rod section on the other hand can be designed to be rotationally fixed to the bearing sleeve and at least one other connection partner can be designed to be rotatable with the bearing sleeve. The first cable tensioning section and / or the second cable tensioning section can be attached to the bearing sleeve.In particular, the first cable tensioning section and / or the second cable tensioning section can be fastened inside the bearing sleeve.

[0019] In an alternative embodiment, in which the first cable tensioning section and the second cable guying section form a common tensioning cable, the tensioning cable can be guided from the foot bar through the bearing sleeve and accordingly through the front bar section and guided back to the foot bar on the opposite side.

[0020] In particular, when the tensioning cable system is coupled to the bearing sleeve, a mechanically preferred coupling, especially a torque-free coupling, is enabled, since the axis of rotation of the joint is formed inside the bearing sleeve, thus securing the tensioning cable system on or in the immediate vicinity of the axis of rotation of the joint, so that, for example, there is no connection or displacement of the tensioning cable system. In particular, no or hardly any negative torque is then transferred to a tensioning lever for fastening the tensioning cables.

[0021] Corresponding to the front joint, the further joint described below can also be designed with a bearing sleeve.

[0022] Extending from the support bar is the foot bar, which is pivotally attached to the support bar by a coupling section, for example, to the front bar section, the rear bar section, or a center bar section. A footrest area is formed on the river section opposite the coupling section, on which the user can place their feet while riding downhill.

[0023] To stabilize the support bar in the operating state, i.e., in the unfolded state, a tensioning cable system is provided. This comprises one or more cables, with a first cable tensioning section running from the base section of the foot bar toward the front bar section, and a second cable tensioning section running from the base section to the rear bar section. The foot bar pushes the first cable tensioning section and the second cable tensioning section away from the support bar at their coupling to the base section, creating a taut and thus stable system between the support bar, the foot bar, and the tensioning cable system.

[0024] The rope tensioning sections can be made of ropes made of natural fibers, such as hemp, or synthetic fibers. Furthermore, the rope tensioning sections can comprise rope-like, band-like, or strap-like elements. The rope tensioning sections can also be made of chain links.

[0025] As the user transfers their weight into the bike via the foot section, the pivoting foot bar aligns in the direction of the weight force, automatically tensioning the first cable tensioning section and the second cable tensioning section. This ensures that the carrier bar, including the front and rear sections, remain in the operating position—i.e., in the unfolded state—while the bike is in use, for example, while riding downhill. Even on uneven terrain, the user's weight ensures that the carrier bar always remains in its operating position.

[0026] This bicycle design eliminates the need for complex mechanisms and fastening devices that lock the joint or footrest in a specific position. The introduction of gravity alone ensures a rigid operating position of the bicycle. This creates a lightweight bicycle without complex mechanisms that can be folded and unfolded quickly and easily. Due to its lightweight and compact construction, the bicycle is particularly suitable for hiking and climbing, as it is easy to handle and can be easily stored in a backpack, for example.

[0027] According to a further exemplary embodiment, the support bar has a bottom side (i.e., a first side / surface) and an upper side opposite the bottom side (i.e., a second side / surface). The front wheel region has a fastening section for a front wheel, and the rear wheel region has a fastening section for a rear wheel, which are arranged in a lower region of the bottom side. The foot bar extends from the bottom side of the support bar into the lower region. Due to the fact that the wheels rest on a floor, support forces are introduced in the front wheel region and in the rear wheel region, which counteract the weight force of the user introduced in the footrest region of the foot bar.Due to the weight of the user, which is transferred to the cable tensioning sections via the footrest area, the cable tensioning sections remain securely tensioned, even if the support forces are temporarily not effective, for example due to vibrations or loss of contact of the wheels with the ground.

[0028] According to another exemplary embodiment, the first cable tensioning section and / or the second cable tensioning section can be guided from the base side to an opposite upper side of the support rod and is fastened to the upper side, in particular releasably. In particular, the releasable fastening of the cable tensioning sections to the upper side of the support rod allows the user to easily fasten and, for example, tension the cable tensioning sections.

[0029] According to a further exemplary embodiment, the first cable tensioning section extends along the upper side over the joint in such a way that the first cable tensioning section is guided on the front rod section from the bottom side to the upper side of the support rod and is fixed on the upper side to the support rod section, which rests on the joint opposite the front rod section.

[0030] Additionally or alternatively, in a further exemplary embodiment, the second cable tensioning section extends along the upper side over the joint in such a way that the second cable tensioning section is guided on the rear rod section from the bottom side to the upper side of the support rod and is fixed on the upper side to the support rod section, which rests on the joint opposite the rear rod section.

[0031] The first cable tensioning section is guided along the surface over the joint and is attached to an adjacent section, for example, the center bar section or the rear bar section. In another exemplary embodiment, the first cable tensioning section can be guided over the joint and over the additional joint described below and attached to the rear bar section. Similarly, the second cable tensioning section can be guided along the surface over the joint and / or the additional joint and attached to the center bar section or the front bar section, respectively.

[0032] In the exemplary embodiment, the force introduction point of the user's weight, which is transferred from the user via the footrest area to the first cable tensioning section and the second cable tensioning section, is placed on the upper side of the support rod. The cable forces, which are introduced via the joint-transmitting cable tensioning sections on the upper side of the support rod, thus cause a moment around the joint or further joint, which has the same direction as the support forces induced via the wheels. In other words, the support forces and the cable tensioning sections generate a jointly directed moment around the joint, which urges or pre-tensions the support rod or the front rod section and the rear rod section into the unfolded state, i.e. the operating state.Due to the introduction of the cable forces at the front bar section and the rear bar section, which in turn are generated by the weight of the user, the stabilizing moments at the joints, which moments hold the support bar in the unfolded state, are increased.

[0033] According to a further exemplary embodiment, the front bar section and the rear bar section define an operating position of the bicycle in an unfolded state, wherein the joint is designed such that when the front bar section and the rear bar section (and optionally the center bar section) are in the operating position, a folding movement of the front bar section and the rear bar section towards the bottom is free and a folding movement towards the top is blocked.

[0034] The joint is designed, for example, such that the front rod section and the rear rod section can be pivoted by 90° from the operating position. For example, the joint can be designed such that, in the operating position, the rod ends of the rod sections rest above the joint toward the top side, preventing the rod sections from pivoting toward the top side from the operating position. For this purpose, a pivot pin bearing of the joint can be formed, for example, on the underside of the adjacent rod sections, so that pivoting of the rod sections from the operating position is only possible toward their underside.

[0035] According to a further exemplary embodiment, the joint or the further joint can be designed such that, when the front rod section and the rear rod section are in the operating position, a folding movement of the front rod section and the rear rod section or the middle rod section towards the top is free and a folding movement towards the bottom is blocked. Thus, the cable forces, which are introduced, for example, at the underside of the support rod, cause a moment around the joint or further joint that has the opposite direction to the support forces induced via the wheels. In other words, the support forces and the cable tensioning sections generate opposing moments around the joint or further joint in order to hold the support rod or the rod sections in the unfolded state, i.e. the operating state.

[0036] According to a further exemplary embodiment, the joint and / or the further joint is freely pivotable and free of a locking device. According to the invention, in the operating position, pivoting of the front rod section and the rear rod section (or the center rod section) toward the top is blocked due to the design of the joint and the rod sections. Pivoting of the front rod section and the rear rod section (or the center rod section) toward the ground is prevented by the bearing forces of the wheels and also by the cable forces of the cable tensioning sections, which are generated by the weight of the user. Additional weight-intensive and complex locking devices for fixing the rod sections in the operating position may therefore be unnecessary.

[0037] According to another exemplary embodiment, the foot bar is attached to the joint. For example, the joint can have a solid base plate that also allows for pivotable fixation of the foot bar. This simplifies the manufacturing of the bicycle according to the invention.

[0038] According to another exemplary embodiment, the first cable tensioning section and the second cable tensioning section form sections of a common cable. In other words, a monolithic, one-piece cable can be used, which is guided from the front bar section via the foot bar to the rear bar section. However, due to the foot bar pivoting due to the user's weight, the cable is pushed away from the support bar, thus introducing weight into the cable.

[0039] According to another exemplary embodiment, the foot bar rests with its foot section sliding on the rope. This means that no fixation between the rope and the foot bar is necessary. The footrest area of the foot bar can thus slide or be moved along the rope. This eliminates the need for precise length adjustment of the first rope tensioning section and the second rope tensioning section. Due to the user's load on the foot bar, it aligns itself essentially along the direction of the weight force and thus pushes the rope away from the support bar, generating even tension in the first rope tensioning section and the second rope tensioning section.

[0040] According to another exemplary embodiment, the first cable-tensioning section forms a first cable, and the second cable-tensioning section forms a second cable separate from the first cable. One end of the first cable and one end of the second cable are fixed to the footrest area.

[0041] According to another exemplary embodiment, foot pedals, in particular foldable ones, are arranged on the foot section for supporting a user's feet. The foot pedals can also have a roughened surface, for example, to improve the grip of a user's foot. The foot pedals can be unfolded in the operating state and folded in accordingly.

[0042] According to a further exemplary embodiment, at least one of the foot pedals can be folded down to function as a bicycle stand. The foot pedal can, for example, lock into two folding positions relative to the foot bar. In a first locking position, the foot pedal is fixed, in particular, at a right angle to the foot bar to provide support for the user's foot. In a second locking position, the foot pedal is fixed at an angle between 130° and 180° to the foot bar to support the bicycle on the foot pedal. In a further exemplary embodiment, the foot pedal and / or the foot bar are length-adjustable, in particular due to a telescopically extendable and retractable design.

[0043] According to a further exemplary embodiment, at least one of the foot pedals is arranged on the support rod so as to be pivotable about a first pivot axis such that it can be folded out and in, wherein at least one of the foot pedals is further arranged on the foot rod so as to be pivotable about a second pivot axis. The second pivot axis is formed in particular perpendicular to the first pivot axis and in particular parallel to a direction of extension of the support rod. In other words, a pivot axis of the foot rod on the support rod, for example on the center rod section or the rear rod section, is not parallel or is at an angle to a pivot axis of the further joint between the center rod section and the rear rod section or of the further joint between the front rod section and the rear rod section. Thus, a compact design can also be achieved in a folded state.

[0044] According to a further exemplary embodiment, the foot pedal is pivotably attached to a further joint sleeve about the first pivot axis by means of a joint sleeve, wherein the further joint sleeve is attached to a guide bushing or a guide pin which is firmly coupled to the foot bar, wherein the guide bushing extends in particular parallel to the foot bar.

[0045] According to a further exemplary embodiment, an inclined support surface for the foot pedal is formed on the foot bar, wherein the inclined support surface is arranged at a distance from the guide bushing. The support surface is designed such that the foot pedal rests at least partially along the inclined support surface during pivoting about the first pivot axis and about the second pivot axis. The inclined support surface is further designed such that, in an operating position, the foot pedal is substantially perpendicular to the foot bar and, during movement of the foot pedal along the inclined support surface and simultaneous pivoting of the foot pedal about the second axis of rotation, the foot pedal pivots about the first pivot axis.

[0046] According to another exemplary embodiment, the bicycle has a tensioning lever for adjusting a cable length of the first cable tensioning section and / or the second cable tensioning section. Thus, the cable tensioning sections can be pretensioned in the operating state.

[0047] According to another exemplary embodiment, the support bar has at least one additional joint, and a center bar section is formed between the joint and the additional joint. The center bar section thus connects the front bar section to the rear bar section. For example, the coupling section of the foot bar can be arranged on the center bar section. Due to the insertion of the center bar section and the possibility of folding it via the joint and the additional joint, the bicycle can be folded and stored more compactly.

[0048] According to another exemplary embodiment, a pivot axis of the joint and a further pivot axis of the further joint are not parallel, in particular skewed, to each other. This results in the front rod section and the rear rod section, together with the corresponding front wheels and rear wheels, overlapping in a folded state, thus enabling a more compact folded state.

[0049] According to a further exemplary embodiment, at least the first cable tensioning section or the second cable tensioning section is formed by means of a fastening eyelet which runs around a fastening pin which is fastened to the foot bar.

[0050] According to a further exemplary embodiment, the fastening pin has a cylindrical shape and the fastening screw runs parallel to a longitudinal axis of the cylindrical fastening pin, so that a lateral surface of the cylindrical fastening pin forms a contact surface for the cable sections of the cable tensioning section or the second cable tensioning section.

[0051] According to a further exemplary embodiment, the fastening screw has a screw axis which runs parallel to the longitudinal axis of the cylindrical fastening pin, wherein the longitudinal axis of the cylindrical fastening pin is formed at a distance from the screw axis of the fastening screw.

[0052] According to another exemplary embodiment, a handlebar is arranged on the front wheel area, pivotable about a steering axis, to which a front wheel can be attached. The handlebar can be attached to the front rod section in a foldable manner and pivoted accordingly between a folded state and the operating state. A clamping device, in particular a quick-release device, can, for example, fix the folded state of the handlebar. Furthermore, the handlebar can be designed to be length-adjustable.

[0053] According to another exemplary embodiment, at least one handlebar is arranged on the handlebar, extending from the handlebar at an angle of 45° to 130°, in particular 90°. The handlebar has, for example, a bicycle grip, which the user can grasp and thus control the handlebar and, accordingly, the bicycle. A corresponding braking device comprising a brake lever is attached to the handlebar, for example.

[0054] According to a further exemplary embodiment, a steering joint is arranged between the handlebar and the grip bar such that the grip bar can be folded relative to the handlebar and the grip bar is parallel to the handlebar in the folded state.

[0055] Additionally, in an exemplary embodiment, a damping system, e.g., with a damped bicycle fork, can be integrated into the front wheel section or the rear wheel section, which dampens the front or rear wheel. A damping system can also be installed on the handlebar. Furthermore, a corresponding braking system, e.g., with disc brakes, can be installed on the front wheel and / or a rear wheel, which can be controlled from the foot section or the handlebar. This can be implemented, for example, via cable systems. The front and rear wheels can have different diameters (e.g., 14" front wheel, 12" rear wheel). Furthermore, two or more wheels can be arranged on the rear axle or front axle (e.g., tricycle configuration, three-track bicycle).

[0056] It should be noted that embodiments of the invention have been described with reference to different subject matter. In particular, some embodiments of the invention are described with device claims, and other embodiments of the invention are described with method claims. However, it will immediately become clear to a person skilled in the art upon reading this application that, unless explicitly stated otherwise, in addition to a combination of features belonging to one type of subject matter, any combination of features belonging to different types of subject matter is also possible. Short description of the drawings

[0057] For further explanation and better understanding of the present invention, embodiments are described in more detail below with reference to the accompanying drawings. Fig. 1shows a schematic representation of a side view of a bicycle in the operating state according to an exemplary embodiment of the present invention. Fig. 2 shows a perspective view of the bicycle from Fig. 1 according to an exemplary embodiment of the present invention. Fig. 3 shows a perspective view of a bicycle with folded foot pedals and a folded handlebar according to an exemplary embodiment of the present invention. Fig. 4 to Fig. 6 show a schematic representation of a bicycle in a folded state according to an exemplary embodiment of the present invention. Fig. 7 and Fig. 8 show an exemplary embodiment of a joint connection between parts of the support rod according to an exemplary embodiment of the present invention. Fig. 9shows another exemplary embodiment of the bicycle with a third tensioning cable section according to an exemplary embodiment of the present invention. Fig. 10 shows a further exemplary embodiment of the bicycle with a third tensioning cable section as an immobilizer according to an exemplary embodiment of the present invention. Fig. 11 shows a detailed view of the mounting of the foot pedals on the foot bar according to an exemplary embodiment of the present invention. Fig. 12 shows a clamping system for the bicycle according to an exemplary embodiment. Fig. 13 shows a clamping system for the bicycle with an eccentric system according to an exemplary embodiment. Detailed description of exemplary embodiments

[0058] Identical or similar components in different figures are provided with the same reference numerals. The representations in the figures are schematic.

[0059] Fig. 1shows a schematic representation of a side view of a bicycle 100 in the operating state and Fig. 2 shows a perspective view of the bicycle 100 from Fig. 1 .

[0060] The bicycle 100 shown is designed in particular for downhill riding. The bicycle 100 has a front wheel section 101, a rear wheel section 102, and a support bar 110 that couples the front wheel section 101 and the rear wheel section 102 to one another. The support bar 110 has at least one joint for folding and unfolding, with the support bar 110 having a front bar section 111 between the front wheel section 101 and the joint 103, and a rear bar section 112 between the rear wheel section 102 and the joint 103. A foot bar 104 is pivotally attached to the support bar 110 by a coupling section 105. The foot bar 104 has a footrest area 108 on a foot section opposite the coupling section 105 for resting the feet of a user of the bicycle 100.A tensioning cable system 120 has a first cable tensioning section 121 and a second cable tensioning section 122, wherein the first cable tensioning section 121 is coupled to the foot section and the front bar section 111, and the second cable tensioning section 122 is coupled to the foot section and the rear bar section 112 such that when a weight force is exerted on the foot section, the foot bar 104 can be aligned in the direction of the weight force and the tensioning cable system 120 can be tensioned. In the unfolded state, ie, in an operating state, the user can stand on the bicycle 100 and ride downhill.

[0061] The joint 103 is provided, for example, by means of a pivot pin which has a pivot axis 301 along its direction of extension (see, for example, Fig. 3) for at least the front rod section 111 or the rear rod section 112. The center rod section 113 is inserted between the front rod section 111 and the rear rod section 112.

[0062] From the support rod 110 extends the foot rod 104, which is pivotally connected to the support rod 110 by a coupling section 105, ie in the embodiment of Fig. 1 for example, on the center pole section 113. On the river section opposite the coupling section 105, a footrest area 108 is formed, on which the user can place his feet while riding downhill on the bicycle 100.

[0063] To stabilize the support rod 110 in the operating state, i.e., in the unfolded state, the tensioning cable system 120 is provided. A first cable tensioning section 121 extends from the base section of the foot rod 104 toward the front rod section 111, and a second cable tensioning section 122 extends from the base section to the rear rod section 112. The foot rod 104 pushes the first cable tensioning section 111 and the second cable tensioning section 112 away from the support rod 110 at their coupling to the base section, creating a tensioned and thus stable system between the support rod 110, the foot rod 104, and the tensioning cable system 120.

[0064] The pivotable foot bar 104 aligns itself in the direction of gravity due to the weight force FG and thus automatically tensions the first cable tensioning section 121 and the second cable tensioning section 122. This results in the support bar 110 with the front bar section 111 and the rear bar section 112 remaining in the operating position, ie in the unfolded state, during operation of the bicycle 100, ie, for example, during downhill riding.

[0065] The support rod 110 has a bottom side 114 and an upper side 115 opposite the bottom side 114. The front wheel area 101 has a mounting section for a front wheel 106, and the rear wheel area 102 has a mounting section for a rear wheel 107, which are arranged below the bottom side 114. The foot bar 104 extends from the bottom side 114 of the support rod 110 into the lower area. Due to the fact that the wheels 106, 107 rest on a floor, bearing forces are introduced in the front wheel area 101 and the rear wheel area 102, which counteract the weight force Fg of the user introduced in the footrest area 105 of the foot bar 104. Due to the weight force Fg of the user, which is transferred via the footrest area 105 to the cable tensioning sections 121, 122, the cable tensioning sections 121, 122 remain securely tensioned.

[0066] The first cable tensioning section 121 in the exemplary embodiment Fig. 1 from the bottom side 114 to the opposite top side 115 of the support rod 110. The first cable tensioning section 121 extends along the top side 115 over the joint 103 such that the first cable tensioning section 121 is guided on the front rod section 111 from the bottom side 114 to the top side 115 of the support rod 110 and is fixed on the top side 115 to the middle rod section 113, which rests on the joint 103 opposite the front rod section 111.

[0067] In the exemplary embodiment of Fig. 1The first cable tensioning section 121 further extends along the upper side 115 via a further joint 116, which pivotally couples the rear rod section 112 to the center rod section 113. If the first cable tensioning section 121 is subjected to tensile stress due to the weight force Fg, the rod sections 111, 112, 113 are fixed in the operating position.

[0068] The force introduction point of the user's weight force Fg, which is transferred from the user via the footrest area 108 to the first cable tensioning section 121 and the second cable tensioning section 122, is placed on the upper side 115 of the support rod 110. Thus, the cable forces, which are introduced via the joint-transmitting cable tensioning sections on the upper side 115 of the support rod 110, cause a moment around the joint 103 or further joint 116, which has the same direction as the support forces induced via the wheels 106, 107. In other words, the support forces and the cable tensioning sections 121, 122 generate a jointly directed moment around the joint 103, 116, which urges or pretensions the support rod 110 or the rod sections 111, 112, 113 into the unfolded state, i.e., the operating state.

[0069] The rod sections 111, 112, 113 define an operating position of the bicycle in an unfolded state, wherein, for example, the joint 103 is designed such that when the front rod section 111 and the middle rod section 113 are in the operating position, a folding movement of the front rod section 111 and the middle rod section 113 in the direction of the underside or bottom side 114 is free and a folding movement in the direction of the top side 115 is blocked.

[0070] The joint 103 is designed, for example, such that the front rod section 111 and the middle rod section 113 can be pivoted by 90° from the operating position. For example, the joint 103 can be designed such that, in the operating position above the joint 103 in the direction of the upper side 115, the rod ends of the rod sections 111, 113 abut, so that pivoting of the rod sections 111, 113 from the operating position toward the upper side 115 is not possible. As shown in Fig. 1 For this purpose, for example, a pivot pin bearing of the joint 103 can be formed on the underside of the adjacent rod sections 111, 113, as shown, so that pivoting of the rod sections 111, 113 from the operating position is only possible in the direction of their underside 104. The further joint 116, which connects the center rod section 113 and the rear rod section 112, can be designed in a manner corresponding to the joint 103.

[0071] The joint 103 and the further joint 103 are freely pivotable and free of a locking device.

[0072] According to the invention, in the operating position, pivoting of the front rod section 111 and the rear rod section 112 (or the center rod section 113) toward the top side 115 is blocked due to the design of the joint 103, 116 and the rod sections 111, 112, 113. Pivoting of the front rod section 111 and the rear rod section 112 (or the center rod section 113) toward the bottom side 114 is prevented by the bearing forces of the wheels 106, 107 and also by the cable forces of the cable tensioning sections 121, 122, which are generated by the weight force Fg of the user.

[0073] The first rope tensioning section 121 and the second rope tensioning section 122 form sections of a common rope. Due to the pivoting of the foot bar 104 by the weight of the user, the rope is nevertheless pushed away from the support bar, thus introducing weight into the rope. The foot bar 104 slides with the foot section on the rope. This means that no fixation between the rope and the foot bar 104 is necessary. The footrest area 108 of the foot bar 104 can thus slide or be moved along the rope. Due to the user's load on the foot bar 104, the foot bar 104 aligns itself essentially along the direction of the weight force Fg and thus pushes the rope away from the support bar 110, thereby generating uniform tension in the first rope tensioning section 121 and the second rope tensioning section 122.

[0074] Foot pedals 109, in particular foldable ones, are arranged on the foot section for supporting a user's feet. The foot pedals 109 can also have, for example, a roughened surface to improve the grip of a user's foot. The foot pedals 109 can be unfolded in the operating state and folded in accordingly.

[0075] The bicycle has a tensioning lever 124 for adjusting a cable length of the first cable tensioning section 121 and / or the second cable tensioning section 122. Thus, the cable tensioning sections 121, 122 can be pretensioned in the operating state.

[0076] A handlebar 117 is arranged on the front wheel area 101, pivotable about a steering axis, to which a front wheel 106 can be attached. The handlebar 117 can be attached to the front rod section 111 in a foldable manner about a handlebar joint 119 and can be pivoted accordingly between a folded state and the operating state. A clamping device, in particular a quick-release device, can, for example, fix the folded state of the handlebar 117. Furthermore, the handlebar 117 can be designed to be length-adjustable.

[0077] At least one handlebar 118 is arranged on the handlebar 117, extending from the handlebar 117 at an angle α of approximately 130°. The handlebar 118 has, for example, a bicycle handle, which the user can grasp and thus control the handlebar 117 and, accordingly, the bicycle 100. A corresponding braking device having a brake lever is attached to the handlebar 118, for example.

[0078] Fig. 3 shows a perspective view of a bicycle 100 with folded foot pedals 109 and a folded handlebar 118 according to an exemplary embodiment of the present invention.

[0079] The foot bar 104 is attached, for example, to the additional joint 116. For example, the joint 116 can have a solid base plate, which also allows for a pivotable fixation of the foot bar 104.

[0080] The foot pedals 109 are attached to the foot bar 104 in a foldable manner. Furthermore, at least one foot pedal 109 can be folded downward to function as a bicycle stand. The foot pedal 109 can, for example, lock into two folding positions relative to the foot bar 104. In a first locking position, the foot pedal 109 is fixed, in particular, at a right angle to the foot bar 104 to provide support for a user's foot. In a second locking position, the foot pedal 109 is fixed at an angle between 130° and 180° to the foot bar 104 to support the bicycle 100 on the foot pedal 109.

[0081] In Fig. 3It is shown that a pivot axis 301 of the joint 103 and another pivot axis 302 of the further joint 116 are not parallel, in particular skewed, to each other. This results in the front rod section 111 and the rear rod section 112, together with the corresponding front wheels 106 and rear wheels 107, overlapping in a folded state, thus enabling a more compact folded state.

[0082] A steering joint 123 is arranged between the handlebar 117 and the grip rod 118 such that the grip rod 118 can be folded relative to the handlebar 117 about a further pivot axis 303 and the grip rod 118 is parallel to the handlebar 117 in the folded state.

[0083] Fig. 4 to Fig. 6 show a schematic representation of a bicycle 100 in a folded state according to an exemplary embodiment of the present invention.

[0084] The pivot axis 301 of the joint 103 and the further pivot axis 302 of the further joint 116 are not parallel, in particular skewed, to each other. This leads, as in Fig. 4 shown that in a folded state the front rod section 111 and the rear rod section 112 together with the corresponding front wheels 106 and rear wheels 107 overlap and thus a more compact folded state is possible.

[0085] At the front wheel area 101, the handlebar 117 is pivotally mounted about a steering axis to which a front wheel 106 can be attached. The handlebar 117 is attached to the front rod section 111 via a handlebar joint 119, so that it can be folded about the pivot axis 401, and can be pivoted accordingly between a folded state and the operating state. The pivot axis 401 is also not parallel to the other pivot axes 301, 302, and 303 to enable the bicycle 100 to be folded compactly.

[0086] Fig. 7 and Fig. 8 show an exemplary embodiment of a joint connection between parts of the support rod 110. In Fig. 7 For example, the joint 103 is shown, which connects the front rod section 111 with the middle rod section 113 or the rear rod section 112.

[0087] The joint is designed as a bearing sleeve or a hollow axle 701. For example, the bearing sleeve 701 can be rotatably attached to the front rod section 111. The front rod section 111 can have a fork shape at the joint 103 and partially enclose the bearing sleeve 701 or have a corresponding opening and completely enclose the bearing sleeve 701. Furthermore, the further connection partner, such as the middle rod section 113 or the rear rod section 112, is coupled to the bearing sleeve 701. The first cable tensioning section 121 forms two adjacent cable sections, with a connecting section 702 of the two cable sections running through the bearing sleeve 701. Thus, the tensioning cable section 121 can be guided from the foot bar 104 through the bearing sleeve 701 and accordingly through the front rod section 111 and guided back to the foot bar 104 on the opposite side.

[0088] Corresponding to the front joint 103, the further joint 116 can also be formed with a bearing sleeve 701.

[0089] Furthermore, a further bearing sleeve 801 can be provided at the end of the rear rod section 112, to which the rear wheel 107 is rotatably mounted. For example, the bearing sleeve 801 can rotatably attach the rear wheel 107 to the rear rod section 112. The further bearing sleeve 801 is, for example, non-rotatably attached to the rear rod section 112, whereby the rear wheel 107 can rotate around the further bearing sleeve 801. Accordingly, the second cable tensioning section 122 can extend through the further bearing sleeve 801 or be fastened in the further bearing sleeve 801.

[0090] Furthermore, the bicycle 100 can have a drive unit 802, 803, which is in particular battery-operated. For example, a battery 804 or a rechargeable battery pack can be arranged in the support bar 110, or in the front bar section 111, the rear bar section 112, and / or the center bar section 113. A drive unit 803, for example a wheel hub motor, can be arranged, for example, in the front wheel 106 and / or the rear wheel 107 to drive them. The drive unit 803 is electrically coupled to the battery 804. Furthermore, a drive unit 802 can be arranged on the support bar 110 in the region of a lateral surface of the front wheel 106 and / or the rear wheel 107 in order to generate a force-transmitting coupling with the lateral surface and accordingly transmit a drive force. The drive unit 802, 803 can be controlled, for example, by a corresponding operating element within the user's reach, iein the handlebar 118 or the steering rod 117.

[0091] Fig. 9shows another exemplary embodiment of the bicycle 110. The bicycle 110 has the front bar section 111, the center bar section 113, and the rear bar section 112. The front bar section 111 is coupled to the center bar section 113 via the joint 103. The center bar section 113 is coupled to the rear bar section 112 via the further joint 116. A third tensioning cable section 901 is shown in the area of the upper side 115. The third tensioning cable section 901 is coupled to at least two bar sections 111, 112, 113 adjacent to a joint 103, 116. For example, the third tensioning cable section 901 is fixed to the front rod section 111 and the center rod section 113 and extends over the joint 103. Alternatively, the third tensioning cable section 901 can be fixed to the center rod section 113 and the rear rod section 112 and extends over the joint 116.In the illustrated embodiment, the third tensioning cable section 901 is fixed to the front bar section 111 and runs over the middle bar section 113 to the rear bar section 112 and is fixed there. In particular, the third tensioning cable section 901 runs along the top side 115, i.e., on an opposite side with respect to the joints 103, 116 compared to the first and second cable tensioning sections 121, 122, which run in the region of the bottom side 114. The third tensioning cable section 901 thus generates, through tension, a torque around the joint 103 and / or the further joint 116, counter to the torque generated by the first tensioning cable section 121 and the second tensioning cable section 123.

[0092] The third cable tensioning section 901 thus provides further stabilization of the operating position of the bicycle 100.

[0093] Furthermore, the third tensioning cable section 901 can be fixed to a rod section 111, 112, 113 by means of a quick-release fastener 902. In the illustrated embodiment, the third cable tensioning section 901 is releasably fastened to the center rod section 113 by means of the quick-release fastener 902. The quick-release fastener can be coupled to the front rod section 111 in addition to being coupled to the center rod section 113. The quick-release fastener 902 thus pulls the front rod section 111 towards the center rod section 113 and simultaneously tensions the third cable tensioning section 901 when the quick-release fastener 902 is in a closed position (see Fig. 9 ) is provided.

[0094] For example, folding of the bicycle 110 can be initiated with the quick release 902 by releasing the joint 103 between the front rod section 111 and the center rod section 113 using the quick release 901 and simultaneously releasing the tension of the tensioning cable section 901 between the center rod section 113 and the rear rod section 112, thus enabling rotation of the two rod sections 112, 113 about the further joint 116.

[0095] Fig. 10shows another exemplary embodiment of the bicycle 110 with the third cable tensioning section 901. A brake lever 1001 is pivotally attached to the rear rod section 112 via a locking bolt 1003. The brake lever 1001 is pivotable such that it can pivot toward the rear wheel 107 and, in a locked position, can be coupled to the rear wheel 107 such that further rotation of the rear wheel 107 is prevented or braked. The brake lever 1001 is pretensioned toward the locked position to lock the rear wheel 107, for example, by means of a spring system.

[0096] In the locked position, the brake lever 1001 can engage with a tire tread of the rear wheel 107. Furthermore, the brake lever 1001 can also be used to provide a braking system or a coupling to a brake disc.

[0097] The third tensioning cable section 901 is further fixed to the brake lever 1001. The tensioning cable section 901 is fixed to the brake lever 1001 in such a way that, when the third tensioning cable section 901 is pulled, the brake lever 1001 can be adjusted from the locked position to a released position against the preload force. In this released position, the rear wheel 107 can rotate freely. The third cable tensioning section 901 can, for example, be guided around the pivot pin 1002 and coupled to the brake lever 1001 via a securing pin 1003.

[0098] If the third cable tensioning section 901 is now tensioned, for example, using the quick release 902, so that it is ensured that the bicycle 100 is in an operating position, rotation of the rear wheel 107 is enabled or a lock is released. If the third cable tensioning section 901 is not under tension and the bicycle 100 is therefore not in the operating position, rotation of the rear wheel 107 is prevented, thus preventing movement of the bicycle 110. This enables, for example, an immobilizer, so that the user can only move the bicycle 110 once a safe operating position of the bicycle 110 has been set.

[0099] In summary, the third tensioning cable section 901 (which can in particular be formed separately from the first tensioning cable section 121 and the second tensioning cable section 122) is tensioned by the quick release 902, so that a folding of the frame or the support rod system 110 during travel is prevented and at the same time the immobilizer is released.

[0100] Fig. 11shows a detailed view of the mounting of the foot pedals 109 on the foot bar 104. The foot pedals 109 are arranged on the support bar 104 so as to be pivotable about a first pivot axis 1101, so that they can be folded out and in. The first pivot axis 1101 runs essentially within a horizontal plane when the bicycle 110 is resting on the ground, so that the foot pedals 109 can be folded out and in towards the ground. For example, the foot pedals 109 can be folded upwards to save space. In addition, the foot pedals 109 can be fastened or locked in an operating position to serve as a support for a user's feet during operation of the bicycle 100. In addition, the foot pedals 109 can be folded out further downwards to function as a bicycle stand.

[0101] Furthermore, the foot pedals 109 can be coupled to the foot bar 104 so as to be rotatable or pivotable about a second pivot axis 1102. The second pivot axis 1102 is in particular perpendicular to the first pivot axis 1101 and runs, for example, parallel to the extension direction of the support bar 104 or within a vertical plane when the bicycle 110 is standing on the ground. For example, a foot pedal 109 can be pivotably attached to a further joint sleeve 1105 with a rotary pin or a joint sleeve 1104, in particular about the first pivot axis 1101. The further joint sleeve 1105 is in turn attached, for example, to a guide bushing 1103, which is firmly coupled to the foot bar 104. The guide bushing 1103 extends parallel to the foot bar 104 and in particular along the first pivot axis 1101. Thus, the further joint sleeve 1105 can pivot the foot pedals 109 about the second pivot axis 1102.

[0102] The foot pedals 109 can thus be pivoted toward the front wheel 106 or toward the rear wheel 107. This provides a protective effect, since in the event of a collision with an obstacle of a foot pedal 109 during operation of the bicycle 100, the foot pedal 109 can, for example, fold backward and yield.

[0103] For example, an inclined support surface 1106 can be provided, which is arranged at a distance from the guide bushing 1103. The support surface 1106 is designed such that the foot pedal 109 rests at least partially along the inclined support surface 1106 during pivoting about the first pivot axis 1101 and the second pivot axis 1102. The inclined support surface 1106 is designed such that, in an operating position, the foot pedal 109 has, for example, a horizontal orientation and is substantially perpendicular to the foot bar 104. Furthermore, the inclined support surface 1106 is designed such that, during pivoting of the foot pedal 109 about the second rotation axis 1102, the foot pedal 109 is pivoted about the first pivot axis 1101 and can thus be pivoted, for example, upwards towards the foot bar 104.

[0104] Furthermore, the inclined ramp or inclined support surface 109 automatically assumes a forward neutral or operating position due to the weight of the user, so that the foot pedal 109 is essentially perpendicular to the foot bar 104. To force the foot pedal 109 into the neutral position, a torsion spring can also be provided, which pushes the foot pedal 109 toward the neutral position even without the weight of the user.

[0105] Fig. 12shows a tensioning system 1201 for the bicycle 100 according to an exemplary embodiment. For example, the first cable tensioning section 121 and the second cable tensioning section 122 are fastened to a floor or a lower end of the foot bar 104. The tensioning cable sections 121, 122 have, for example, fastening eyes 1204 that extend around a fastening pin 1202. The fastening pin 1202 is fastened with a fastening screw 1203. For example, the first cable tensioning section 121 can be formed with two parallel cable sections each, and the second cable tensioning section 122 can also be formed with two parallel cable sections each. For example, one cable section each of the first cable tensioning section 121 and the second cable tensioning section 122 is fastened to the fastening pin 1202. Alternatively, all cable sections can be fastened to one fastening pin 1202.Alternatively, a separate fastening pin 1202 can be provided for each rope section.

[0106] As in Fig. 13As shown, the fastening pin 1202 can, for example, have a cylindrical shape, wherein the fastening screw 1203 runs parallel to the longitudinal axis 1301 of the cylindrical shape. Thus, the round outer surface of the cylindrical fastening pin 1202 forms a contact surface for the cable sections. In particular, the fastening screw 1203 can have a screw axis 1302 that runs parallel to the longitudinal axis 1301 of the cylindrical fastening pin 1202. Furthermore, the tensioning system 1201 can be designed such that the longitudinal axis 1301 of the cylindrical fastening pin 1202 is spaced from the screw axis 1302 of the fastening screw 1203. Thus, an eccentric system is created, with which a tension or loosening of the cable sections attached to it is generated when the cylindrical fastening pin 1202 rotates about the screw axis 1302. Thus, a fine adjustment of the cable tensions orthe first and second cable tensioning sections 121, 122.

[0107] It should also be noted that "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude a plurality. Furthermore, it should be noted that features or steps described with reference to one of the above embodiments may also be used in combination with other features or steps of other embodiments described above, provided they fall within the scope of the appended claims. Reference signs in the claims are not to be considered as limitations. List of reference symbols:

[0108] 100 Bicycle 401 Swivel axis steering rod joint 101 Front wheel area 102 Rear wheel area 701 bearing sleeve 103 joint 702 connecting section 104 Footbar 801 additional bearing sleeve 105 coupling section 802 drive unit 106 front wheel 803 additional drive unit 107 rear wheel 804 Battery, battery pack 108 Footrest area 901 third rope tensioning section 109 Foot pedal 902 quick release 110 support bar 1001 brake lever 111 Front bar section 1002 Pivot bolt 112 Rear rod section 1003 locking bolt 113 Center bar section 1101 first swivel axis 114 bottom side 1102 second swivel axis 115 Top 1103 Guide bushing 116 another joint 1104 Joint sleeve 117 handlebar 1105 additional joint sleeve 118 handlebar 1106 inclined support surface 119 Steering rod joint 1201 clamping system 120 Tension cable system 1202 Mounting pin 121 first rope tensioning section 1203 Fixing screw 122 second rope tensioning section 1204 Mounting eyelet 123 steering joint 1301 Longitudinal axis 124 clamping lever 1302 screw axis 301 Swivel axis joint 302 Swivel axis additional joint Fg Weight 303 Swivel axis steering joint

Claims

1. A bicycle (100) for downhill driving, the bicycle (100) comprising a front wheel region (101), a rear wheel region (102), a support rod (110) coupling the front wheel region (101) and the rear wheel region (102) to each other, wherein the support rod (110) comprises at least one joint (103) for unfolding and folding the support rod (110), wherein the support rod (110) comprises a front rod portion (111) between the front wheel region (101) and the joint (103) and a rear rod portion (112) between the rear wheel region (102) and the joint (103), a foot rod (104) fastened to the support rod (110) by a coupling portion (105) of the foot rod (104), wherein the foot rod (104) comprises, at a foot portion of the foot rod (104) opposite the coupling portion (105), a foot rest region (108) for resting feet of a user of the bicycle (100), a tensioning cable system (120) comprising a first cable tensioning portion (121) and a second cable tensioning portion (122), characterized in that the foot rod (104) is pivotably fastened to the support rod (110) by the coupling portion (105) of the foot rod (104), and the first cable tensioning portion (121) is coupled to the foot portion and the front rod portion (111) and the second cable tensioning portion (122) is coupled to the foot portion and the rear rod portion (112) in such a way that, when a weight force is exerted on the foot portion, the foot rod (104) can be aligned in the direction of the weight force and the tensioning cable system (120) can be tensioned.

2. The bicycle (100) according to claim 1, wherein the support rod (110) comprises a bottom side (114) and a top side (115) opposite the bottom side (114), wherein the front wheel region (101) comprises a fastening portion for a front wheel (106) and the rear wheel region (102) comprises a fastening portion for a rear wheel (107), which are arranged in a lower region of the bottom side (114), wherein the foot rod (104) extends from the bottom side (114) of the support rod (110) into the lower region.

3. The bicycle (100) according to claim 2, wherein the first cable tensioning portion (121) and / or the second cable tensioning portion (122) can be guided from the bottom side (114) onto an opposite top side (115) of the support rod (110) and is fastened, in particular releasably, to the top side (115).

4. The bicycle (100) according to claim 3, wherein the first cable tensioning portion (121) extends along the top side (115) over the joint (103) in such a way that the first cable tensioning portion (121) is guided at the front rod portion (111) from the bottom side (114) onto the top side (115) of the support rod (110) and is fixed on the support rod portion, which abuts against the joint (103) opposite the front rod portion (111), on the top side (115), and / or wherein the second cable tensioning portion (122) extends along the top side (115) over the joint (103) in such a way that the second cable tensioning portion (122) is guided at the rear rod portion (112) from the bottom side (114) onto the top side (115) of the support rod (110) and is fixed on the support rod portion, which abuts against the joint (103) opposite the rear rod portion (112), on the top side (115).

5. The bicycle (100) according to one of the claims 2 to 4, wherein the front rod portion (111) and the rear rod portion (112), in a folded-out state, define an operating position of the bicycle (100), wherein the joint (103) is designed in such a way that, when the front rod portion (111) and the rear rod portion (112) are in the operating position, a folding movement of the front rod portion (111) and the rear rod portion (112) in the direction of the bottom side is free and a folding movement in the direction of the top side (115) is blocked, wherein the joint (103) is in particular freely pivotable and free of a locking device.

6. The bicycle (100) according to one of the claims 1 to 5, wherein the foot rod (104) is fastened to the joint (103), wherein the joint (103) in particular comprises a bearing sleeve (701) which is designed in such a way that the support rod (110) is articulated for unfolding and folding.

7. The bicycle (100) according to claim 6, wherein at least the first cable tensioning portion (121) or the second cable tensioning portion (122) is fastened in the interior of the bearing sleeve (701) or runs partially through the bearing sleeve (701).

8. The bicycle (100) according to one of the claims 1 to 7, wherein the cable tensioning system (120) comprises a third cable tensioning portion (901) which runs along a top side (115) and is fastened to the support rod (110) on opposite sides with respect to the joint (103), wherein the third cable tensioning portion (901) is configured in such a way that it generates a torque about the joint (103) by tensioning, counter to the torque which can be generated by the first cable tensioning portion (121) and the second cable tensioning portion (122).

9. The bicycle (100) according to claim 8, further comprising a quick-release tensioner (902) releasably fixing the third cable tensioning portion (901) to the support rod (110), and / or a brake lever (1001) pivotably fastened to the rear rod portion (112) in such a way that the brake lever (1001) is pivotable in the direction of the rear wheel (107) and, in a blocking position, can be coupled to the rear wheel (107) in such a way that further rotation of the rear wheel (107) can be prevented.

10. The bicycle (100) according to one of the claims 1 to 9, wherein the first cable tensioning portion (121) and the second cable tensioning portion (122) form portions of a common cable, wherein in particular the foot rod (104) rests with the foot portion on the cable in a sliding manner.

11. The bicycle (100) according to one of the claims 1 to 10, wherein the first cable tensioning portion (121) forms a first cable and the second cable tensioning portion (122) forms a second cable which is separate from the first cable.

12. The bicycle (100) according to one of the claims 1 to 11, wherein, on the foot portion, in particular foldable, foot pedals (109) for supporting feet of a user are arranged, wherein, in particular, at least one of the foot pedals (109) can be unfolded downwards in order to function as a bicycle stand, wherein, in particular, at least one of the foot pedals (109) is arranged on the support rod (104) pivotably about a first pivot axis (1101) in such a way that it can be unfolded and folded, wherein, in particular, at least one of the foot pedals (109) is further arranged on the foot rod (104) pivotably about a second pivot axis (1102), wherein the second pivot axis (1102) is designed in particular perpendicular to the first pivot axis (1101) and in particular parallel to an extension direction of the support rod (104), wherein in particular the foot pedal (109) is fastened by a joint sleeve (1104) to a further joint sleeve (1105) pivotably about the first pivot axis (1101), wherein in particular the further joint sleeve (1105) is fastened to a guide bush (1103) which is fixedly coupled to the foot rod (104), wherein the guide bush (1103) extends in particular parallel to the foot rod (104), wherein in particular an oblique support surface (1106) for the foot pedal (109) is formed on the foot rod (104), wherein the oblique support surface (1106) is arranged spaced apart from the guide bush (1103), wherein the support surface (1106) is designed in such a way that the foot pedal (109) rests at least partially along the oblique support surface (1106) during the pivoting about the second pivot axis (1102) and about the first pivot axis (1101), wherein the oblique support surface (1106) is further designed in such a way that, in an operating position, the foot pedal (109) is substantially perpendicular to the foot rod (104) and, during a movement of the foot pedal (109) along the oblique support surface (1106) and a simultaneous pivoting of the foot pedal (109) about the first pivot axis (1102), the foot pedal (109) pivots about the first pivot axis (1101).

13. The bicycle (100) according to one of the claims 1 to 12, further comprising at least one of the following features a tensioning lever (124) for adjusting a cable length of the first cable tensioning portion (121) and / or of the second cable tensioning portion (122), wherein the support rod (110) comprises at least one further joint (116) and a central rod portion (113) is formed between the joint (103) and the further joint (116), wherein in particular a pivot axis of the joint (103) and a further pivot axis of the further joint (116) are not parallel to each other, wherein at least the first cable tensioning portion (121) or the second cable tensioning portion (122) is formed by means of a fastening eye (1204) which runs around a fastening pin (1202) which is fastened to the foot rod (104), wherein the fastening pin (1202) is fastened with a fastening screw (1203), wherein the fastening pin (1202) has a cylindrical shape and the fastening screw (1203) runs parallel to a longitudinal axis (1301) of the cylindrical fastening pin (1202), so that a lateral surface of the cylindrical fastening pin (1202) forms a contact surface for the cable portions of the cable tensioning portion (121) or of the second cable tensioning portion (122), and wherein the fastening screw (1203) has a screw axis (1302) which runs parallel to the longitudinal axis (1301) of the cylindrical fastening pin (1202), wherein the longitudinal axis (1301) of the cylindrical fastening pin (1202) is formed spaced apart from the screw axis (1302) of the fastening screw (1203).

14. The bicycle (100) according to one of the claims 1 to 13, wherein a steering rod (117) is arranged at the front wheel region (101) pivotably about a steering axis, on which steering rod a front wheel (106) can be fastened, wherein in particular at least one handle rod (118) is arranged at the steering rod (117), which handle rod extends from the steering rod (117) at an angle of 45° to 130°, in particular 90°, wherein in particular a steering joint (123) is arranged between the steering rod (117) and the handle rod (118) in such a way that the handle rod (118) can be folded in relative to the steering rod (117) and the handle rod (118), in the folded-in state, is parallel to the steering rod (117).

15. A method for providing a bicycle (100) for downhill driving according to one of the claims 1 to 14, wherein the method comprises unfolding and folding the support rod (110), and pivoting the foot rod (104), so that a weight force can be exerted on the foot portion of the foot rod (104), in order to align the foot rod (104) in the direction of the weight force and the tensioning cable system (120) is tensioned.