FOLDING BICYCLE WITH FOLDING HANDLEBAR, WHEELS AND FRAME, COMPRISING AN INTEGRATED STRUCTURE PROVIDING A MINIMUM FOLDED CONFIGURATION

Abstract

The present invention relates to a folding bicycle comprising a plurality of folding elements which are grouped together into main elements, such as the frame (3), the handlebar (1), the front wheel (25), and the rear wheel (24), said main elements being combined to form one inseparable element.

The plurality of folding elements that are grouped together to form main elements allow the folding bicycle of the present invention to be carried in a so-called folded state or configuration in which it occupies a minimum volume. The folded configuration allows the bicycle to be easily transported or packed inside a standard backpack.

In the so-called unfolded or maximum-size configuration, the folding bicycle of the present invention can be cycled comfortably and safely like any standard size bicycle. The integrity of all of the components or elements of the folding bicycle of the present invention is maintained in both the folded and unfolded configurations, as well as when switching between the two configurations, meaning that there are no loose pieces and that all of the constituent elements are permanently attached to one another. The process for switching between the folded and unfolded configurations, or vice versa, is simple and does not require any external elements or additional tools, and can be carried out by the user alone following simple steps.

Claims

1. Folding bicycle with integral elements and undetachable in its different elements, characterized by they conform by a folding frame (3), a folding handlebar system (1) and folding wheels (24) and (25) which in its whole in its fold state it is inferior to the area of the wheel in its unfold state and where the fold conformation all its elements are vertically aligned.

2. The folding bicycle in accordance with the claim 1 in which the folding frame it is characterized because incorporate the joint system and the folding system of the rear wheel, seat post (15), saddle (16), the bottom bracket (13), bottom joint of the seat post (14), folding power transmission elements and the extensible down tube (11).

3. The folding bicycle in accordance with the claim 2 in where the joint system and the folding system of the rear wheel incorporated rear fork (19), top seat stays (17) and the bottom seat stays (18) which them allow the position displacement of the rear fork to its unfold position to its fold position and vice versa.

4. The folding bicycle in accordance with the claim 2 in which the folding power transmission elements incorporate the power transmission device (21), the front belt-drive (22), the rear belt-drive (20), the rear belt-drive lock (42) and the front belt-drive lock (43), where the power transmission device (21) it is flexible.

5. The folding bicycle in accordance with the claim 2 in which the extensible down tube (11) incorporate the top joint of the extensible down tube (10) and the bottom joint of the lower extensible post (12) where the down tube it is extensible.

6. The folding bicycle in accordance with the claim 2 in which the bottom bracket (13) it is the axis between the bottom joint of the lower extensible post (12) and the bottom joint of the seat post (14).

7. The folding bicycle in accordance with the claim 1 in which the folding handle bar incorporates the handlebar (2), the handlebar stem joint (4), handlebar extension system (5), articulated handlebar base (6), bottom stem (7), steering node joint (9), in where the handlebar on its fold state it stores between the of the wheel arch segment (27) (b, c,) of the front wheel by the rotation action of the articulated handlebar base (6).

8. The folding bicycle in accordance with the claim 7 where the handlebar transit from its T shape form its unfold state through a 90 rotation in the frontal plane, to be vertically aligned to the handlebar extension system (5).

9. The folding bicycle in accordance with the claim 7 where the handlebar extension system (5) transit from its unfold state thanks to retracts itself to its fold state.

10. The folding bicycle in accordance with the claim 1 where the rear wheel (24) and the front wheel (25) are characterized because incorporate the wheel arch segment (27) (a, b, c, d), the wheel arch node (29), wheel articulated arm (30), wheel axis node (31).

11. The folding bicycle in accordance with the claim 10 where the wheel arch segment (27), are foldable, allowing the road action, damping and keep structural integrity of the wheel toroid (26).

12. The folding bicycle in accordance with the claim 10 in which wheel arch node (29) keeps the wheel arch segment (27), aligned in its sagittal plane in its fold and unfold state.

13. The folding bicycle in accordance with the claim 10 where the wheel arch node (29) also allow rotate the wheel arch segment (27), from its fold state to its unfold state and vice versa through the wheel arch articulation (28).

14. The folding bicycle in accordance with the claim 10 where the wheel articulated arm (30) join the wheel arch node (29) with the wheel axis node (31) and support the compression and tension of the wheels (24 and 25).

15. The folding bicycle in accordance with the claim 10 where the wheel axis node (31) allow couple and disengage the wheel arch segment (27).

16. The folding bicycle in accordance with the claim 10 in which the wheel axis node (31) allow the rotation of the wheel in its entirety and the independent rotation of the wheel articulated arm (30) in the folding and unfolding process.

17. The folding bicycle in accordance with the claim 10 in which the set of the wheel axis nodes (31), to form the hub wheel.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0052] Will be described the attached figures.

[0053] FIG. 1 Invention lateral view in it's unfold state.

[0054] FIG. 2 Invention lateral view in its fold state.

[0055] FIG. 3 Front wheel (25) lateral view in its unfold state.

[0056] FIG. 4 Perspective of the wheel in its fold state.

[0057] FIG. 5 Perspective of the invention in it's unfold state (top drawing) and fold state (below drawing) in the sagittal axis (35). In this drawing it shows the relation between widths in its fold and unfold state.

[0058] FIG. 6 perspective of the invention in its unfold state (left drawing) and fold state (right drawing) comparing height, using as a base the floor in dotted line.

[0059] FIG. 7 Invention top full view, comparing the unfold state (left drawing) and fold state (right drawing).

[0060] FIG. 8 Invention frame (3) lateral view, showing the displacement of the rear fork (19) in it's unfold state (left continuous line), to its fold state (continuous right line), with an intermediate middle state as an example (center dotted line).

[0061] FIG. 9 Invention lateral view in this unfold state showing in continuous line the sections conformed by the rear wheel (24) and the front wheel (25).

[0062] FIG. 10 Invention lateral view in its unfold state showing in continuous line the frame section (3).

[0063] FIG. 11 Invention lateral view in its unfold state showing in continuous line the handlebar section (1).

[0064] FIG. 12 Frame (3) components lateral view and rear wheel (24) in its unfold state, pointing the maximum distance (33) between the rear belt-drive (20) and the front belt-drive (22).

[0065] FIG. 13 Invention lateral view in its folding state, pointing the minimal distance (34) between the rear belt-drive (20) and the front belt-drive (22).

[0066] FIG. 14 Invention lateral view in it's unfold state highlighting in dotted line the displacement of the seat (16) for the fold and unfold process.

[0067] FIG. 15 Bottom bracket (13) upper perspective and the seat post (15), the bottom joint of the seat post (14), to the bottom joint of the lower extensible post (12) and the extensible down tube (11).

[0068] FIG. 16 Range movement perspective of the wheel articulated arm (30) of the wheel arch segment (27) (a)

[0069] FIG. 17 Perspective of the displacement of the wheel arch segment (27) (a).

[0070] FIG. 18 Perspective of the rotation of the wheel arch segment (27) (a).

[0071] FIG. 18 Perspective of the rotation of the wheel arch segment (27) (a).

[0072] FIG. 20 Perspective of the rotation range of the wheel toroid (26) of the wheel arch segment (27) (b, c, d).

[0073] FIG. 21 Perspective of the relation of the wheel toroid (26) wheel arch segment (27) (b, c, d).

[0074] FIG. 22 Perspective of the movement range of the wheel articulated arm (30) of the wheel arch segment (27) (b).

[0075] FIG. 23 Perspective of the displacement of the wheel arch segment (27) (b).

[0076] FIG. 24 Perspective of the range rotation of the wheel arch segment (27) (b).

[0077] FIG. 25 Perspective of the rotation of the wheel arch segment (27) (b).

[0078] FIG. 26 Perspective of the rotation range of the wheel toroid (26) of the wheel arch segment (27) (c, d).

[0079] FIG. 27 Perspective of the rotation of the wheel toroid (26) wheel arch segment (27) (c, d).

[0080] FIG. 28 Perspective of the rotation range of the wheel arch segment (27) (c).

[0081] FIG. 29 Perspective of the rotation of the wheel arch segment (27) (c)

[0082] FIG. 30 Perspective of the movement range of the wheel articulated arm (30) of the wheel arch segment (27) (d).

[0083] FIG. 31 Displacement perspective of the wheel arch segment (27) (d).

[0084] FIG. 32 Rotation range perspective of the wheel toroid (26) of the wheel arch segment (27) (d).

[0085] FIG. 33 Rotation perspective of the wheel toroid (26) of the wheel arch segment (27) (d).

[0086] FIG. 34. Range rotation perspective of the wheel arch segment (27) (d).

[0087] FIG. 35 Rotation perspective of the wheel arch segment (27) (d).

[0088] FIG. 36 Rotation range perspective of the wheel arch segment (27) (a, b, c, d).

[0089] FIG. 37 Rotation perspective of the wheel arch segment (27) (a, b, c, d).

[0090] FIG. 38 Perspective of the front wheel (25) in its folding state.

[0091] FIG. 39 Side view of the front wheel (25) in its folding state.

[0092] FIG. 40 Movement range perspective of the wheel arch segment (27).

[0093] FIG. 41 Movement perspective of the wheel arch segment (27).

[0094] FIG. 42 Perspective of the movement of the handlebar (1).

[0095] FIG. 43 Perspective of the rear wheel (24) in its fold state.

[0096] FIG. 44 Side view of the invention with the fold wheels.

[0097] FIG. 45 Side view of the folding displacement of the back fork (19).

[0098] FIG. 46 Side view of the displacement range of the saddle (16).

[0099] FIG. 47 Side view of the displacement of the saddle (16) in folding process.

[0100] FIG. 48 Rotation range perspective of the handlebar (2).

[0101] FIG. 49 Rotation perspective of the handlebar (2) folding.

[0102] FIG. 50 Retract range perspective of the handlebar extension system (5).

[0103] FIG. 51 Retraction perspective of the handlebar extension system (5).

[0104] FIG. 52 Rotation range perspective of the handlebar system (1)

[0105] FIG. 53 Rotation perspective of the handlebar system (1).

[0106] FIG. 54 Rotation range side view of the extensible down tube (11).

[0107] FIG. 55 Retraction side view of the extensible down tube (11).

[0108] FIG. 56 Rotation range side view of the top articulation of the extensible down tube (10).

[0109] FIG. 57 Rotation side view of the top articulation of the extensible down tube (10).

[0110] FIG. 58 Rotation range side view of the bottom joint of the lower extensible post (12).

[0111] FIG. 59 Rotation side view of the bottom joint of the lower extensible post (12).

[0112] FIG. 60 Sagittal plane (35), of the unfold invention.

[0113] FIG. 61 Sagittal plane (35), of the fold invention.

[0114] FIG. 62 Front plane (36), of the unfold invention.

[0115] FIG. 63 Front plane (36), of the fold invention.

[0116] FIG. 64 Crossplane (37), of the unfold invention.

[0117] FIG. 65 Crossplane (37), of the fold invention.

[0118] FIG. 66 Anteroposterior axis (38), of the unfold invention.

[0119] FIG. 67 Anteroposterior axis (38), of the fold invention.

[0120] FIG. 68 Vertical axis (39), of the fold invention.

[0121] FIG. 69 Vertical axis (39), of the fold invention.

[0122] FIG. 70 Cross axis (40), with the unfold invention.

[0123] FIG. 71 cross axis (40), of the fold invention.

[0124] FIG. 72 Side view of the wheel toroid (26).

[0125] FIG. 73 Detailed view of the node (41).

[0126] FIG. 74 Side view of the steering axis (44) with regard to the handlebar axis (45).

[0127] FIG. 75 Exploded view of the wheel axis (31).

[0128] FIG. 76 Rotation perspective of the wheel spin.

[0129] FIG. 77 Rotation perspective of the wheel axis node (31).

[0130] FIG. 78 Back view of the displacement range of the wheel arch segment (27), due to the action of the double articulation of the wheel articulated arm (30).

[0131] FIG. 79 Bottom perspective view of the front belt-drive lock (43), in is unfold state.

[0132] FIG. 80 Bottom perspective view of the front belt-drive lock (43), in its fold state.

[0133] FIG. 81 Back perspective of the rear belt-drivelock (42), in it's unfold state.

[0134] FIG. 82 Perspective of the rear belt-drivelock (42), in its fold state.

[0135] FIG. 83 Side view of the bicycle in it's unfold state (47) and the bicycle fold state (48), in comparison with a human scale (46).

INVENTION DESCRIPTION

[0136] The word bicycle, invention bicycle, invention o other word referring to the bicycle filing application, it is used in an indistinct way and it is referred to folding bicycle object to the invention claim in this document.

[0137] The word state or configuration it is referring to the realization or conclude stages of the folding bicycle of this document, where the words state or configuration can be use indistinctly denote either its unfold and fold state.

[0138] This bicycle presents two forms configuration or states, a maximum denominated Unfold as it shows in the FIG. 1, in which all the components in the frame (3), the handlebar system (1), the front wheel (25) and the rear wheel (24) are deployed being the optimal state to be used as a transport device.

[0139] A second configuration or state its denominated Fold FIG. 2, in which all the components in the frame (3), the handlebar system (1), the front wheel (25) and the rear wheel (24) are compacted being the optimal state to storage.

[0140] Either states or configurations are described in the FIG. 83, in which its shows the relationship between both configurations, with a human scale.

[0141] In the FIG. 83 its showed the bicycle in the bicycle in its unfold state (47) with regard to the folding relationship to the bicycle fold state (48) and both in relation to the human scale (46). Notice that the bicycle in its unfold state (47) it is safe and comfortable; in the meantime the bicycle fold state (48)) it is optimal to storage. Also it showed a 170 cm (5.57 ft.) average human scale, being used as an example model for this document, not limit itself.

[0142] The folding systems of the frame (3), the rear wheel (24), front wheel (25) and the handlebar system (1) of this invention allows when its fold all the systems are aligned vertically side by side in the sagittal plane (35), as it is shown in the FIG. 2. All that allow the dimensions in the sagittal plane (35), being smallest to the diameter of the wheel when its unfold FIG. 5.

[0143] Additionally in the FIG. 5, it showed the relationship in the sagittal plane (35) between the unfolded state (up draw) and the fold state (below draw). In this figure it's shown that when the invention it's in it fold state is less wide that the wheel in its unfold state. This area relation it is possible thanks to the folding actions of the rear wheel (24), the front wheel (25), the frame (3) and the handlebar system

[0144] In the FIG. 6, it shown the area relation between the bicycle in its unfold state (left draw) and its fold state (right draw), in this figure we can see that when the bicycle it is in fold state its height it's the same of the unfold wheel.

[0145] The bicycle it's conformed mainly by the sections named: rear wheel (24), the front wheel (25), the frame (3) and the handlebar system (1).

[0146] In the FIG. 9, it's shown the rear wheel (24) and the front wheel (25) individually in continuous line, by the wheel arch segment (27), the wheel arch articulation (28), the wheel arch node (29), the wheel articulated arm (30) the wheel axis node (31) and the wheel axis (32).

[0147] The wheel unfold and fold process it is achieved first thanks to its discreet segment conformation. This segments known as wheel arch segment (27), allowed that in the unfold state al the segments of the wheel arch segments (27), are aligned in the sagittal plane (35) creating a wheel toroid (26), having the needed structure and tension required to the wheel components work in the ride.

[0148] Likewise the wheel toroid (26) conformed by direct segments allows to the combined action of the wheel articulated arm (30) and the wheel axis node (31) displace the wheel arch segments (27) to its fold state as its shown in the FIG. 4 (the wheel fold and unfold process it is detailed describe in the FIG. 16 to FIG. 43).

[0149] The wheel in its unfold state (24 and 25) the wheel arch segments (27), conformed the wheel toroid (26) referring to the donut shape that it gets with this action, all that's allow the wheel works to the road at its shown in the FIG. 72.

[0150] The wheel articulated arm (30) join the wheel arch node (29) with the wheel axis node (31) and supports the compression and tension of the wheels (24 and 25). This compression and tension happens with the bicycle in its unfold state.

[0151] The wheel arch segment (27) contains in its structure the running surface (the wheel surface which is in contact with the road).sub.1, the damping surface (the wheel structure that cushion the ride).sub.1 and the structural surface (the area that give strength to the whole wheel).sub.1, needed for a safety and comfortable ride. 1. This clarifications in parenthesis are no present in the spanish original document, because are not needed to defining the surfaces in the wheel. They are added just for clarification purposes and do not add characteristics or any other information.

[0152] The wheel hub construction its created by the align of the wheel axis nodes (31), as its shown in the FIG. 75 explosive, this allows the wheel to have two types of rotation.

[0153] The first rotation type as its shown in the FIG. 76, happens when the wheel are in its unfold state and all the wheel components are integrated to allow the wheel rad rotation.

[0154] The second rotation type as its shown in the FIG. 77, happened during the wheel fold and unfold process, in which each wheel axis nodes (31), rotate independently to position each one vertically in its fold state as it shown in the FIG. 4, or with the same rotation reach its unfold position like in the FIG. 3.

[0155] The wheel arch segments (27) are join to the wheel axis nodes (31) by the wheel articulated arms (30) which allows to change from the wheel fold state to the unfold state and vice versa.

[0156] The FIG. 10, show the section frame (3) in continuous line. This section its build by the components that give it the geometry, the structure and the traction to the bicycle when it's in the unfold state.

[0157] The joints and extension of this components allow the frame (3) to transit from the fold state to the unfold state and vice versa.

[0158] The section of the frame (3) it is divided in the following elements: the rear fork (19), the top seat stays (17), the bottom seat stays (18), the seat post (15), the saddle (16), the bottom bracket (13), bottom joint of the seat post (14), bottom joint of the lower extensible post (12), the power transmission device (21), the front belt-drive (22), front belt-drive lock (43), rear belt-drive (20), the rear belt-drive lock (42), the top joint of the extensible down tube (10), the extensible down tube (11) and the pedals (23).

[0159] In the FIG. 11, it show the handlebar system (1), in continuous line which its conformed by the handlebar (2), handlebar joint (4), the handlebar extension system (5), articulated handlebar base (6), handlebar bottom stem (7), steering node joint (9).

[0160] The steering node joint (9), allows the rotation in the sagittal plane (35) for the folding process, as in the in the steering of the front wheel in the crossplane (37), when its unfold for the road. In the FIG. 73 it's shown the two types of rotation describe the steering node joint (9).

[0161] The handlebar axis (45), is the mechanical connection with the handlebar system (1), its which allow the user steering the invention as a transport. The handlebar axis (45) it is eccentric to the steering axis (44), which is the one to allow the rotation of the handlebar system (1) and the front wheel (25). This detail can be observed in the FIG. 74.

[0162] To reduce the folding volume, the handlebar system (1), its storage in the front wheel between the wheel arch segments (27) (b, c) which they create a gap as it shown in the FIG. 42, storing the handlebar vertically in its fold state.

[0163] The frame folding happens in the sagittal plane (35) thanks to a series of joints that connect the systems.

[0164] The seat post (15), it's a reference of a traditional element of a bicycle, which can be built on a series of geometries like bars, tubes or a combination.

[0165] As well the extensible down tube (11), it's a reference of known denomination of this bicycle component, and it can be built on a series of geometries like bars, tubes or a combination.

[0166] This folding bicycle invention can be built in its entirety or on individual components using a single material or a combination of material for each element, this material can be metallic alloy, composite materials like fiberglass or carbon fiber, polymers and natural materials like wood, bamboo and leather.

[0167] The elements of the bicycle sections; the rear wheel (24), the front wheel (25), the frame (3) and the handlebar system (1), they fold thanks to a series of joints that allows it fold and unfold this elements in next sequence.

[0168] Step 1, the folding process as it's shown in the FIG. 17. It displaces the wheel arch segment (27) (a), from is aligned position with the wheel toroid (26) to its fold position. In the FIG. 16 it's shown the range movement of the wheel arch segment (27).

[0169] The displacement of the wheel arch segment (27), between their fold and unfold positions it is possible thang to the coordinated action of the wheel articulated arm (30).

[0170] The articulation (interior) that joints with the wheel axis node (31) which allow this wheel arch segment (27), displaces form its unfold position (FIG. 3), central of the wheel toroid (26) to its fold position and vice versa.

[0171] Also the articulation (exterior) that join the wheel articulated arm (30), with the wheel arch node (29), allowed to the wheel arch segment (27), keep its vertical all the time.

[0172] The combined action of the articulations of the wheel articulated arm (30), it is shown in the FIG. 78.

[0173] Step 2 of folding as its shown in the FIG. 19, the wheel arch segment (27), make contact with the wheel axis node (31). In the FIG. 18 it shown the rotation range of the articulation of the wheel on the wheel arch segment (27) (a).

[0174] Step 3 of folding as it shown in the FIG. 21 its rotates 90 the wheel toroid (26), composed by the wheel arch segment (27) (b, c, d), align the wheel arch segment (27) (a, b), of the wheel articulated arm (30) which it maintain the same position of the step before. In the FIG. 20 it's shown the rotation range of the wheel arch segment (27) (b, c, d)

[0175] Step 4 of folding as it shown in the FIG. 23, it displaces wheel arch segment (27) (b), it rotates in the cross axis (40), until the interior part of the wheel arch segment (27), make contact with the wheel axis node (31). In the FIG. 22 it showed the movement range of the wheel arch segment (27).

[0176] Step 5 of folding as it shown in the FIG. 25, the wheel arch segment (27) (b) it rotates in the cross axis (40), until the interior part of the wheel arch segment (27), make contact with the wheel axis node (31). In the FIG. 24 it showed the movement range of the wheel arch segment (27) (b).

[0177] Step 6 of folding as it shown in the FIG. 27 its rotates 90 the wheel toroid (26), composed by the wheel arch segment (27) (c, d), align the wheel arch segment (27) (c), of the wheel articulated arm (30) of the wheel arch segment (27) (b, a) which keeps vertically. In the FIG. 20 it's shown the rotation range of the wheel arch segment (27) (c, d).

[0178] Step 7 of folding as it shown in the FIG. 29, it displaces wheel arch segment (27) (c), it rotates in the cross axis (40), until the interior part of the wheel arch segment (27), make contact with the wheel axis node (31). In the FIG. 28 it showed the movement range of the wheel arch segment (27) (c).

[0179] Step 8 of folding as it shown in the FIG. 31, it displaces wheel arch segment (27) (d), from its position align with the wheel toroid (26), to its storage position. In the FIG. 30 it showed the movement range of the wheel arch segment (27) (d).

[0180] Step 9 of folding as it shown in the FIG. 33 its rotates 90 the wheel toroid (26), composed by the wheel arch segment (27) (d), align the wheel arch segment (27) (a, b), of the wheel articulated arm (30) which keep vertically FIG. 20 its shown the rotation range of the wheel arch segment (27) (d).

[0181] Step 10 of folding as it shown in the FIG. 35, it displaces wheel arch segment (27) (d), it rotates in the cross axis (40), until the interior part of the wheel arch segment (27), make contact with the wheel axis node (31). In the FIG. 34 it showed the movement range of the wheel arch segment (27) (d).

[0182] At the end of this step all the wheel arch segment (27), are vertically align.

[0183] Step 11 of folding as it shown in the FIG. 37, the set of the wheel arch segment (27), fold it rotates until make contact with its correspondent, been the front fork (8) or the rear fork (19).

[0184] Step 12 of folding as it shown in the FIG. 41, it generate a gap between the sections (b, c). In the FIG. 42 it show the gap created between the arch segment (27) (b, c). The function of this gap it's contain the handlebar system (1) ones its fold as it shown in the FIG. 53, this step its possible only in the front wheel.

[0185] For the folding of the rear wheel (24) it's the same procedure until step 11, in which finish the folding process of the rear wheel as it shown in the FIG. 43.

[0186] In the FIG. 42 is shown the final result of the folding process of the front wheel (25) and in the FIG. 43, it shown the final result of the folding process of the rear wheel (24).

[0187] Step 13 of folding as it shown in the FIG. 45, the rear fork (19) side to the rear wheel (24), it's displaced from its unfold position to its fold position.

[0188] This step displacement it's achieved by the combine action of the seat stays. Individually the top seat stays (17) dictates the separation between the ear fork (19) and the seat post (15), meanwhile the bottom seat stays (18) defines the angle of the rear fork (19). This displacement actions are showed in detail in the FIG. 8.

[0189] The rear fork (19) in its unfold state as it shown in the FIG. 4, keeps the rear belt-drive (20) away from the front belt-drive (22) to it maximum distance (33), which allows the power transmission device (21) transfer the pedaling power to the rear wheel for movement.

[0190] When the rear fork pass to its fold state, the distance between the rear belt-drive (20) and the front belt-drive (22) it reduces to its minimum distance (34) allowing the minimum storing space as it shown in the FIG. 46.

[0191] The power transmission device (21), keep its own integrity during the folding and unfolding process, likewise its folding state FIG. 2, thanks it uses a flexible material like a band type.

[0192] The power transmission device (21) it stay fixed to the rear belt-drive (20) and to the front belt-drive (22) during the bicycle fold state and the folding and unfolding transitions, thanks to the rear sure of the rear belt-drive lock (42), and the front sure of the front belt-drive lock (43), which avoids that the power transmission device (21) loose contact with rear belt-drive (20) and the front belt-drive (22) in the moment that the power transmission device (21) loose its tension in the fold state as well in the fold and the folding and unfolding transitions. This integrity it cannot be maintained with a metallic chain due the integrity is achieved only by tension, which it is loose in the fold state likewise in the state transitions of this invention.

[0193] Step 14 of folding as it shown in the FIG. 47, the saddle (16) transfers for its unfold state to its fold state. In the FIG. 46 it showed displacement range of the saddle.

[0194] Step 15 of folding as it shown in the FIG. 49, the handlebar (2), it is in its T shape in it's unfold state, its turn 90 in the front plane (36). This action allows the handlebar to be vertically aligned with the handlebar extension system (5). In the FIG. 48 it shown the rotation range of the handlebar (2).

[0195] Step 16 of folding as it shown in the FIG. 51, the handlebar extension system transition from it's unfold state, when its retracts to its fold state. In the FIG. 50 it's shown the extension range of the handlebar extension system (5).

[0196] Step 17 of folding as it shown in the FIG. 53, the handlebar system (1), its rotate to front in the sagittal plane (35), to being parallel aligned with the front fork (8). The handlebar system (1) it storages in the gap between the wheel arch segment (27) (b, c) of the front wheel of the step 12 which it is shown in the FIG. 41 and FIG. 42. In the FIG. 52, it showed the rotation range of the articulated handlebar base (6).

[0197] Step 18 of folding as it shown in the FIG. 55, the extensible down tube (11) it reduces it's unfolding maximum extension to the fold state. In the FIG. 54 it showed the extension range of the extensible down tube (11).

[0198] Step 19 of folding as it shown in the FIG. 57, the group elements conformed by the steering node joint (9), the handlebar bottom stem (7), the front fork (8), the front wheel (25) and the handlebar system (1), turn thanks to the top joint of the extensible down tube (10) backwards in the sagittal plane (35), to be parallel alignment to the extensible down tube (11). In the FIG. 56 its shown the rotation range.

[0199] Step 20 of folding as it shown in the FIG. 59 the group elements conformed by the extensible down tube (11), the steering node joint (9), bottom stem (7), front fork (8), front wheel (25) and the handlebar system (1), rotate thanks to the bottom bracket (13), and the combined action of the bottom joint of the seat post (14) and the bottom joint of the lower extensible post (12) like articulation joints, until said group been parallel aligned with the seat post (15), this is shown in the FIG. 15 (In this figure as a reference the front wheel in the left and the left wheel in the right). In the FIG. 58 it shown the rotation range of the elements group.

[0200] With the steps sequence mentioned before achieve change the bicycle configuration from it unfold state FIG. 1, to its fold state FIG. 2.

[0201] In order to the bicycle can change state from its fold state to its unfold state it is necessary follow the same steps but in reverse order from the step 20 to the step 1.

[0202] The folding system of the frame (3), the handlebar system (1), front wheel (25) and the rear wheel (24), allow this invention to have a maximum ratio in its unfold state to a minimum ratio when it's in its fold state, in relation with a human sale as it shown in the FIG. 83.

[0203] The systems of the frame (3), the handlebar system (1), the front wheel (25) and the rear wheel (24), allow that the bicycle area in its fold state, will be smaller than the wheel area when it is in its unfold state as it shown in the FIG. 5, that is to say the bicycle size in its fold state it is inferior that the wheel in its unfold state.

[0204] The fact that the fold process mainly happen in the sagittal plane (35), do not increase the bicycle area in its cross axis (40), as it shown in the FIG. 7.

[0205] In the bicycle unfold state the front belt-drive (22) and the rear belt-drive (20), keeps the regular distance between them which allow keep the necessary tension to the power transmission device (21), make turn the back wheel to pedaling.

[0206] On the other hand in the folding state, the rear fork (19), it displaces that allows it to be aligned with the seat post (15)n as it shown in the FIG. 8, this folding action allows also the front belt-drive (22) and the rear belt-drive (20), facing each other, in the quest of a minimal storage folding state.

[0207] Even if this invention has been described in reference to specific details and modalities of itself, it's not intend that details are been considered as limitations of the invention reach, except how as far that are include in the claims that are attached, so that a lot of modifications and variations are possible in referent to the previous description.

Glossary

[0208] Sagittal plane (35): It is the plane which divide the invention in right and left half which its shown in the FIG. 60 unfold bicycle and FIG. 61 fold bicycle.

[0209] Front plane (36): It is the plane which divides the invention in rear half and front half as it shown in the FIG. 62 unfolding bicycle and FIG. 63 fold bicycle.

[0210] Crossplane (37): It is the plane to divide the invention in an up half and bottom half as it is shown in the FIG. 64 unfold bicycle and Fig. fold bicycle.

[0211] Anteroposterior axis (38): It is the axis that goes from front to back and it is perpendicular to the front plane (36), as it shown in the FIG. 66 unfold bicycle and FIG. 67 fold bicycle.

[0212] Vertical axis (39): It is the axis that goes from top to down and it is perpendicular to the horizontal plane as its shown in the FIG. 68 unfold bicycle and FIG. 69 fold bicycle.

[0213] Cross axis (40): It is the axis that goes from side to side and it is perpendicular to the sagittal plane (35), as it is shown in the FIG. 70 unfold bicycle and FIG. 71 fold bicycle.

[0214] Wheel toroid (26): It is the toroid geometry (donut shape), which the wheel acquire when it is fully armed or unfold and ready to road, as it shown in the FIG. 72. Equally applied in the front wheel (25) and the rear wheel (24).

[0215] Node: It means to a piece that it is the join point of several parts. As example shown in the FIG. 76, the node (41), it works as join point between the pieces (e) and piece (f).

[0216] Rotation: It refers to a piece rotation using an axis as rotation center, keeping in a define plane.

[0217] Displacement: It is defined by the define distance travel of a particulate piece dictated by a rails, telescopic extension, or joints.

[0218] ArticulationJoint: It meant to a connection between two solids witch allow it both move or rotate thanks to the converge in the same axis or fulcrum.