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Title:
BICYCLE WITH IMPROVED SAFETY AGAINST FORCED BURGLARY
Document Type and Number:
WIPO Patent Application WO/2021/064574
Kind Code:
A1
Abstract:
Bicycle (1) with improved security against forced burglary comprising: a supporting frame (2) provided with a front part (3) and a rear part (4); at least one front wheel (5) arranged in correspondence with said front part (3) of said supporting frame (2) and connected to said supporting frame (2) by means of a fork (6); at least one rear wheel (7) arranged in correspondence with said rear part (4) of said supporting frame (2) and connected to a plurality of rear stays (8, 9) of said supporting frame (2), characterized by the fact of comprising at least one rigid shaped insert (10) configured to allow the stable and temporary fastening of said frame (2) of said bicycle (1) to a fixed constraint structure (S), and protruding from said fork (6) and/or by at least one of said rear stays (8, 9) of said supporting frame (2) in such a way as to define a through opening (12) suitable for allowing the passage of a removable mechanical constraint element (E) to said support structure (S), said rigid shaped insert (10): being substantially C-shaped with both ends fixed to at least one of the tubular elements (6', 6") of said fork (6) and/or to at least one of said rear stays (8, 9) of said load-bearing frame ( 2), said welding being made on the portion of the respective tubular element (6, 6') or rear stay (8, 9) which is substantially facing the through hole (12), said ends forming with the portion of the tubular element (6', 6") of said fork (6) and/or said rear stays (8, 9) of said load-bearing frame, an angle a greater than 90°.

Inventors:
LE VAN TINH (IT)
Application Number:
IB2020/059108
Publication Date:
April 08, 2021
Filing Date:
September 29, 2020
Export Citation:
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Assignee:
LE VAN TINH (IT)
International Classes:
B62H5/00; B62H5/06; B62K19/06; B62K19/20; B62K19/30; B62K21/02; E05B71/00
Foreign References:
DE202010015165U12011-03-24
US5917407A1999-06-29
US4290284A1981-09-22
TWM545078U2017-07-11
Attorney, Agent or Firm:
PIOVESANA, Paolo (Via F. Baracca 5/A, Venezia Mestre, IT)
Download PDF:
Claims:
C L A I M S

1. Bicycle (1 ) with improved security against forced burglary comprising:

- a supporting frame (2) provided with a front part (3) and a rear part (4);

- at least one front wheel (5) arranged in correspondence with said front part (3) of said supporting frame (2) and connected to said supporting frame (2) by means of a fork (6);

- at least one rear wheel (7) arranged in correspondence with said rear part (4) of said supporting frame (2) and connected to a plurality of rear stays (8, 9) of said supporting frame (2), characterized by the fact of comprising at least one rigid shaped insert (10) configured to allow the stable and temporary fastening of said frame (2) of said bicycle (1) to a fixed constraint structure (S), and protruding from said fork (6) and/or by at least one of said rear stays (8, 9) of said supporting frame (2) in such a way as to define a through opening (12) suitable for allowing the passage of a removable mechanical constraint element (E) to said support structure (S), said rigid shaped insert (10):

- being substantially C-shaped with both ends fixed to at least one of the tubular elements (6’, 6") of said fork (6) and/or to at least one of said rear stays (8, 9) of said load-bearing frame ( 2), - said welding being made on the portion of the respective tubular element (6, 6’) or rear stay (8, 9) which is substantially facing the through hole (12),

- said ends forming with the portion of the tubular element (6’, 6") of said fork (6) and/or said rear stays (8, 9) of said load-bearing frame, an angle a greater than 90°. 2. Bicycle according to claim 1 characterized in that it comprises a rigid shaped element (10) associated with a tubular element (6’) of said front fork (6).

3. Bicycle according to claim 2 characterized in that it comprises a pair of rigid shaped elements (10), each associated with a tubular element (6’, 6") of said front fork (6).

4. Bicycle according to one or more of the preceding claims, characterized in that it comprises a further rigid shaped element (10’) associated with one of said rear stays (8, 9).

5. Bicycle according to one or more of the preceding claims, characterized in that it comprises a further pair of rigid shaped elements (10’) each associated with one of said rear stays (8, 9).

6. Bicycle (1 ) according to one or more of the preceding claims, characterized in that said rigid shaped insert (10) protrudes from the side wall (6a, 8a, 9a), and/or from the front wall (6b, 8b 9b) and/or from the rear wall (6c, 8c, 9c), of said fork (6) and/or of at least one of said rear stays (8, 9).

7. Bicycle according to one or more of the preceding claims characterized in that said rigid shaped element (10) is directly associated with the wall (6a, 8a, 9a, 6b, 8b, 9b, 6c, 8c, 9c) from which it protrudes.

8. Bicycle according to one or more of the preceding claims characterized in that said angle a is greater than 120°, and preferably greater than 135°.

9. Bicycle (1 ) according to one or more of the preceding claims, characterized in that said rigid shaped insert (10) is made of the same material with which said fork (6) and/or said rear stays (8, 9) of said bearing frame (2) are made.

10. Bicycle (1 ) according to one or more of the preceding claims, characterized in that said rigid shaped insert (10) is made of metallic material.

11. Bicycle (1 ) according to one or more of the preceding claims, characterized in that said rigid shaped insert (10) is at least partly a solid body.

12. Bicycle (1 ) according to one or more of the preceding claims, characterized in that said rigid shaped insert (10) has a lateral surface facing outwards (10d) without sharp edges.

13. Bicycle (1 ) according to one or more of the preceding claims, characterized in that said rigid shaped insert (10) has, in lateral view and in operating conditions, any one of the profiles chosen from the group consisting of a U-shaped profile reversed by 90 anticlockwise, W profile reversed clockwise by 90°, C profile reversed by 180°, profile in the shape of a semicircle, profile in the shape of a semi ellipse and the like.

14. Bicycle (1 ) according to one or more of the preceding claims, characterized in that said removable mechanical element (E) comprises a chain with rings (C) partially inserted in said pass hole (12) when said bicycle (1 ) is temporarily secured to said support structure (S) is provided with a safety padlock (L) adapted to be hooked to the ends of said chain with rings (C).

Description:
BICYCLE WITH IMPROVED SAFETY AGAINST FORCED BURGLARY.

The present invention relates to a bicycle with improved security against forced and fraudulent burglary (or break-in or theft) when temporarily and removably secured, by means of hooking or locking means, to a support structure anchored to the ground, such as for example a rack, a railing, a parapet, a lighting pole, an overhanging concrete element, a gate, a tree or other body suitable for the purpose.

The technical concept underlying the invention can be extended to any type of bicycle such as a traditional city bicycle (or "city bike"), a mountain bike, an electric bicycle (also known as an electric assisted bicycle), a women's bicycle, a men's bike, a racing (or competition) bike, a BMX, a rental bike, a recumbent bike, a tandem bike, and so on. As is known, the bicycle is a vehicle (which from a technical and regulatory point of view falls into the broader category of cycles) powered by the human muscular strength of the lower limbs It basically consists of a load-bearing frame to which two aligned wheels are constrained and is equipped with a mechanical system for transmitting power to the driving wheel.

Recent sector research has shown that, for example in Italy, about one million bicycles are stolen by burglary every year: in this regard, it is estimated that about two out of three Italians, every year, suffer theft of their bicycle or some its essential part, such as the frame.

Not to mention Holland, where around 450,000 bicycles are stolen every year on a fleet of 18 million vehicles (more than one per inhabitant), and France where around 400,000 bicycles are stolen every year. These are undoubtedly very high numbers, mainly determined by the impressive ease with which it is possible to steal a bicycle and which leads to a turnover, that of the black market for bicycles, estimated at around 200 million euros.

The stolen bicycles are the most diverse, from those for "city" use (city bikes) for home-work trips to the more professional ones (mountain bikes, electric bicycles, or racing bicycles), worth a few thousand euros.

When people are out and about, outside the home and therefore outdoors, it is possible to temporarily park the bicycle in a relatively safe way by tying it to a pole, a railing or a rack or any other element available in a public environment..

The rack, as it is firmly anchored to the ground and difficult to break, certainly represents the ideal, most widespread, most appropriate, specifically dedicated and most effective support on which a person can leave the bicycle parked, ensuring certain safety conditions against its fraudulent burglary by malicious people.

To achieve this, it is necessary to take some precautions, such as using a typical safety padlock and, preferably, a burglar-proof chain made of material with high mechanical resistance, useful for making the bicycle integral with the rack or other analogous support structure. The practical situation currently encountered to park a bicycle safely, close to a support structure of the comb type (especially a rack but also a railing and the like), is, however, only hypothetically definable as safe and far from guaranteeing actual and concrete conditions of tranquility to the user, so that it is clear that, at the state of the art, the drawback of how to make the timed parking of a bicycle more secure to prevent possible fraudulent burglary actions can go disadvantageously successful.

The main drawback of the known art, therefore, derives from the fact that, when parked, temporarily placed in an orderly manner on a support structure such as a rack made available by a public or private establishment, the bicycle is not in optimal safety conditions and is still exposed, despite the measures that can be adopted, to the complete theft or a large part of it such as the frame and a wheel (usually the rear one).

This is due to the fact that, to ensure the bicycle in an orderly manner and in keeping with public decorum, support structures - typically racks - are currently made available which have a rather low height from the ground so that the user or owner is substantially obliged, if not unconsciously led, to apply the locking/coupling means between the front wheel and the support structure, thus leaving the attackers free to fraudulently remove the load-bearing frame together with the unconstrained wheel (usually, in fact, the rear wheel).

In fact, it often happens that nowadays the user or the owner of the bicycle, also due to haste, does not pay due attention in securing the bicycle to support structures of the aforementioned type and simply constrains by means of the locking means attach the most comfortable component, that is the front wheel, to these support structures made generally available outdoors by public or private entities.

This is reflected on the one hand in high risks, which often turn into real situations, of theft of the bicycle suffered by the user or the owner and, on the other hand, induced and no less relevant, in an evident implication of social character and in an effective impact on the community, as the part of the bicycle that remains bound to the support structure (usually the front wheel only) disfigures the public environment and/or the street furniture, affecting the decor to a considerable extent. Last but not least, it must be considered that in the event that, to obtain greater safety, the user or the owner hooks the fork or a part of the supporting frame of the bicycle to the support structure, the coupling system adopted inevitably strips and rubs against the painted exterior surface of the component concerned, ruining its aesthetic impact which is undoubtedly a factor also in this kind of articles.

DE 20 20210015 165 describes a device to be associated with the front fork of a bicycle in order to make burglary more difficult. The device consists of a curved tube, preferably metallic, of which one end has a rounded portion, which is made to adhere laterally and then welded to a tine of the fork, and the second end is engaged on the hub of the front wheel and also welded to the same tine as the fork. In this the curved tube and the portion of the tine, to which it is welded, form a sort of slot, inside which a chain or other device suitable for securing the bicycle to an external element can be passed.

However, the solution is not fully satisfactory as the end of the curved tube that is welded to the fork prong at the wheel hub is too thin not to have to replace the threaded pin of the hub, the curved tube can be detached from the tine with a forcing of limited intensity, while if in order to avoid this inconvenience it is dimensioned adequately, its bulk requires the replacement of the threaded pin with evident laboriousness in the assembly operations of the curved tube.

US 5917407 describes a bicycle rental station which provides a horizontal bar positioned substantially at the height of the bicycle handlebars and a plurality of locking mechanisms associated with the bar and enclosed within a protection tunnel. On bicycles, and in particular on the tube to which the handlebar column is articulated, a C-shaped element is welded which allows the bicycle to be fastened to said bar by means of the locking mechanisms.

However, this solution is not fully satisfactory as the C-shaped element is specifically designed to be used in cooperation with the locking mechanism, and in particular it is positioned in a position that is difficult to use to secure the bicycle to a rack.

TWM 545078U describes a device for securing a bicycle to any fixed structure. It includes an element to be fixed to the bicycle frame near the rear fork. The device comprises a box-shaped body which houses a locking device and a cavity intended to receive a first end of a metal cable to be engaged by the locking device. The second end of the cable is slotted so that it can be crossed by the cable itself after it has engaged any fixed structure to which the bicycle must be constrained, but before its first end is introduced and locked in said cavity. In the box-like body there is also a seat for inserting a key for unlocking its first end from said box-like body.

However, this solution is not fully satisfactory as it is complex to manufacture and install, and furthermore the positioning of the box-shaped body, just below the saddle, makes it unsuitable for securing the bicycle to a rack. The present invention aims to eliminate all these drawbacks and to provide a bicycle which has a high level of security against theft attempts and which at the same time eliminates all the drawbacks present in the state of the art.

In particular, the main purpose of the invention is to propose a bicycle with improved security against forced and fraudulent break-in (or break-in or theft), which is able to counteract the action of criminals more than the known art, making it substantially ineffective and vain, if not actually dissuading it.

In other words, the primary purpose of the present invention is to propose a bicycle with improved safety which is less exposed to the risk of forced entry and consequent fraudulent theft of one or more of its main component parts.

It is a further object of the invention to propose a bicycle with improved security against forced and fraudulent break-in, which allows to keep quick, if not simplifying them, the operations that the user must perform to secure the bicycle to a support structure of the comb type, arranged at a low height from the ground, for example a rack. In the cognitive sphere of these purposes, it is the task of the invention to propose a bicycle with improved safety against forced and fraudulent break-in that makes the user or owner more serene and peaceful than the state of the art when leaving his bicycle temporarily parked in an unsupervised place, secured to a support structure anchored to the ground. It is another task of the invention to propose a bicycle with improved safety which allows to preserve to a greater extent than the prior art the decor of the public environment and/or urban furniture where its use involves temporarily parking it at a support structure outdoors.

It is a further object of the present invention to propose a bicycle whose locking element is more resistant to attacks that try to force it.

It is a further object of the present invention to propose a bicycle which is simple and economical to produce.

It is a further object of the present invention to propose a bicycle which is difficult to break through by using levers or hammers in order to break and/or deform the locking element.

It is another object of the present invention to create a bicycle with improved safety against forced and fraudulent break-in which allows to avoid that the locking/coupling means, when used to temporarily constrain it to a generic support structure, damage the most visible and more easily visible parts on the outside of the supporting frame of the bicycle, a situation which is instead found in conventional bicycles.

All these objects and others that will emerge from the following description are achieved by a bicycle with improved security against forced and fraudulent burglary as defined in claim 1.

Further detailed constructional characteristics of the bicycle with improved security against forced and fraudulent break-in of the invention are contained in the corresponding dependent claims.

Advantageously, the bicycle with improved safety against forced break-in of the present invention contrasts more than the state of the art, even to dissuade them, the bad guys who intend to unduly and illegally remove one or more component parts of a bicycle bound outdoors on a support structure, making any current attempts at this purpose substantially ineffective, useless, or at least much more difficult. This is thanks to the fact that the bicycle of the invention comprises, in particular, at least one rigid shaped insert fixed by means of structural joining means to the fork and/or to at least one of the rear stays of the supporting frame and protruding, respectively, from the fork and/or from at least one of the rear stays of the supporting frame itself in such a way as to define a through hole that allows the passage of a removable mechanical element, which in turn can be removably coupled to a support structure, such as a rack, anchored to the ground to secure the bicycle to the latter in a stable and temporary way. Equally advantageously, the bicycle with improved safety against forced break-in, object of the invention, is such that it can be hooked up in a rather quick and effective way, simpler than the current state of the art, and at the same time safe to a support structure of the comb type, arranged at a low height from the ground, such as a rack.

Still advantageously, by means of the bicycle with improved safety against forced break-in of the present invention, the user or the owner leaves his bicycle temporarily parked in an open place, secured to a support structure anchored to the ground, with greater tranquillity compared to what is currently happening, to the full advantage of the serenity of the moments he spends without keeping it under his view.

Advantageously, moreover, the bicycle with improved safety against forced break-in of the invention, by avoiding more the risks of its theft compared to the prior art, also increases the decorum of the public environment and/or of the street furniture, since the bicycle according to the invention more effectively avoids that some of its components, completely unsightly and even dangerously, remain bound to the support structure after the remaining part of the bicycle has been fraudulently taken by the criminals (situation typical of the current state).

Equally advantageously, again thanks to its rigid shaped insert, the bicycle according to the invention prevents the locking/coupling means, when used to temporarily constrain it to a generic support structure such as a rack, from rubbing against the painted outer surface of some relevant parts, more directly in view, of the supporting frame of the bicycle, thus avoiding its progressive damage and, therefore, the restoration or repair work.

Further characteristics and particularities of the present invention will appear to a greater extent from the following description, relating to a preferred embodiment of the bicycle with improved security against forced and fraudulent break-in claimed herein exclusively, given by way of example and not limited to, with the aid of the attached drawing table in which: figure 1 is an axonometric view of the bicycle of the invention, when in conditions of non-use and momentarily parked on a support structure such as, in this case, a railing; figure 2 is an enlargement of a constructive detail of the bicycle of Figure 1 ; and figure 3 shows from above the front fork of figure 2.

The bicycle with improved security against forced break-in (or theft), object of the invention, is illustrated schematically and by way of example in figure 1 where it is globally numbered with 1.

As can be seen, the bicycle 1 comprises, according to customary:

- a supporting frame, indicated as a whole with 2, provided with a front part 3 and a rear part 4;

- a front wheel 5 arranged in correspondence with the front part 3 of the supporting frame 2 to which it is connected by means of a fork 6;

- a rear wheel 7 arranged in correspondence with the rear part 4 of the supporting frame 2 and connected to a plurality of rear stays 8, 9 of the supporting frame 2.

According to the essential and salient innovative characteristics of the invention, the bicycle 1 comprises at least one rigid shaped insert 10 fixed by means of structural joining means, to a tine of the fork 6 of the supporting frame 2, from which protrudes in such a way as to define, together with the fork 6, a through hole 12 suitable for allowing the passage of a removable mechanical constraint element E, also removably coupled to a support structure S, such as the railing shown in figure 1 , anchored to the ground to secure the bicycle 1 in a stable and temporary way to the support structure S.

For example, the removable mechanical constraint element E can be a chain, a padlock, a U-lock, or a flexible and strong wire (or rope), such as a metal cable, and entually covered with a sheath. In particular, since the front fork 6 comprises two tubular tines 6’, 6" which hold the front wheel 5, the rigid shaped insert 10 can be fixed indifferently to one of the two tines 6', 6”. In a further embodiment, a pair of rigid shaped inserts 10 can be present, associated with both tines 6’, 6".

Preferably, the rigid shaped insert 10, in particular, protrudes from the side wall a, comprised between the front wall 6b and the rear wall 6c, of the respective tine 6’, 6".

Alternatively, the rigid shaped insert 10 can protrude from the front wall 6a or from the rear wall 6c of the fork 6, in order to reduce the lateral bulk of the insert itself.

In any case, the rigid shaped element 10 can be directly associated with the wall 6a, 6b, 6c from which it protrudes.

Please note, only for the sake of completeness and scruple, that the rear stays 8, 9 belong to the rear part 4 (also known as the "rear stay") of the supporting frame 2 of bicycle 1 and are generally divided into two slanted rear stays 8 and in two rear sliders 9.

Advantageously, the bicycle 1 can provide at least one further rigid shaped insert 10’ fixed to one of the rear sliders 8, 9 of the bicycle, and/or to at least one of the sliders 9. In particular, since there are generally two oblique rear sliders 8 and horizontal 9, to which the rear wheel 7 is associated, the further rigid shaped insert 10’ can be fixed indifferently to one of the two slant rear stays 8. In a further embodiment there can be a further pair of rigid shaped inserts 10’ associated with each rear seat stay 8. In this case the rigid shaped insert can preferably protrude from the lateral wall 8a, 9a comprised between the front wall 8b, 9b and the rear wall 8c, 9c of each slider 9. Alternatively, the rigid shaped insert 10 can protrude from the front wall 9a or from the rear wall 9c of the slider or each horizontal slider 9, in order to reduce the lateral dimensions of the insert itself. In any case, the rigid shaped element 10 can be associated directly with the wall 6a, 8a, 9a, 6b, 8b, 9b, 6c, 8c, 9c from which it protrudes.

Advantageously, the further rigid shaped insert 10’ can substantially be similar to the rigid shaped insert 10, and therefore the two will not be distinguished in the rest of the description. Advantageously, the upper portion of the rigid shaped element 10 forms an upper angle of 90° and preferably greater than 135° at its point of attachment with the tine of the front fork 6 or with a rear fork 8,9, in order to frustrate or at least to attenuate the effects of an attack through the use of blunt instruments. Advantageously, the rigid shaped element 10 can have a substantially continuous profile with respect to the wall 6a, 6b, 6c, 8a, 8b, 8c, 9a, 9b, 9c to which it is associated, again in order to make the attachment more difficult by means of the use of blunt instruments such as a hammer.

Advantageously, moreover, the rigid shaped element can have a profile slightly protruding with respect to the wall 6a, 6b, 6c, 8a, 8b, 8c, 9a, 9b, 9c from which it protrudes, again in order to reduce the effectiveness of an attack with a blunt instrument.

Conveniently, therefore, the through hole 12 can have a passage section just sufficient to allow the passage of the removable mechanical constraint element E, and in particular it can have a passage section of less than about 15 cm 2 , and preferably less than about 8 cm. 2 .

Advantageously, the rigid shaped insert 10 can be substantially symmetrical with respect to a plane perpendicular to the axis of the element 6, 8, 9 with which it is associated and passing substantially halfway between the two ends of the element itself.

Furthermore, suitably, the rigid shaped insert 10 is made of the same material with which the fork 6 is made; in general, the material with which the supporting frame 2 of the bicycle is made is a metallic material, such as steel, titanium, aluminum, but there may be executive variants in which this material is carbon or magnesium alloy.

Preferably but not necessarily, the rigid shaped insert 10 is a solid body (a sort of folded or curved rod).

According to the preferred embodiment of the invention described here, the rigid shaped insert 10 has a lateral surface facing outwards without sharp edges: advantageously, this constructive arrangement, on the one hand, reduces the negative effects on the structural integrity of the rigid shaped insert 10 deriving from any accidental impacts suffered by the shaped insert 10 itself against external structures and, on the other hand, reduces the danger of accidental impacts against the shaped insert 10 possibly suffered by people, for example with their own legs.

In this context, the rigid shaped insert 10 preferably presents, in lateral view and in operating conditions, any one of the profiles chosen from the group consisting of a U profile rotated by 90° counter clockwise, W profile rotated clockwise by 90°, C profile rotated 180°, semicircle-shaped profile, semi-ellipse- shaped profile and similar.

As far as the structural joining means 11 is concerned, they comprise at least one section of welding carried out in correspondence with the joining area 13 between the rigid shaped insert 10 and the fork 6. More in detail, the welding section is carried out perimetrally, according to an annular path, in the joining area 13.

Preferably both ends of the rigid shaped insert 10 can be associated with the frame 2 of the bicycle 1.

Alternative solutions of the bicycle of the invention, not shown in the attached drawing tables, the joining means structural may include a coupling by mechanical interference, capable of offering high mechanical resistance against a possible break-in attempt by malicious people.

With reference to the removable mechanical constraint element E, it comprises, purely as a preferred and non-binding (however advantageous) example, link chain C partially inserted into the through hole 12 when the bicycle 1 according to the invention is temporarily secured to the support structure S and is equipped with a safety padlock L suitable for being hooked to the ends (not visible and therefore not marked by a specific reference) of the chain with links C to close it on itself. On the basis of the description just provided, it is therefore understood how the bicycle with improved security against forced and fraudulent burglary (or break- in) according to the invention achieves the purposes and achieves the already mentioned advantages. The rigid shaped insert of which the bicycle of the invention is provided offers a dedicated component, immediate and easy to exploit and shaped in such a way as to have a minimum aesthetic impact and to be not at all dangerous for people (bicycle user or people that pass close to it), to the point that the user or the owner performs the maneuver of coupling the bicycle claimed here to a support structure, in particular if of low height from the ground such as a rack, in an extremely rapid way, obtaining a locking against forced and fraudulent break-in more secure than in the known art.

In the executive phase, modifications may be made to the bicycle with improved security against forced and fraudulent burglary (or break-in) according to the present invention, consisting, for example, of structural joining means different from those described previously.

Moreover, in further embodiments of the present invention, not yet shown, the claimed bicycle may include a rigid shaped insert fixed by means of structural joining means to the fork and another rigid shaped insert fixed by means of structural joining means to one of the rear stays.

In addition, in other constructive solutions of the present invention, again not shown in the attached figures, the bicycle may comprise more than one rigid shaped insert fixed by means of structural joining means to the fork, or more than one rigid shaped insert fixed by means of structural joining means to one of the rear stays of the supporting frame.

Finally, in further optional variants, not shown below, the bicycle according to the invention may include a plurality of rigid shaped inserts fixed, by means of the structural joining means, to different rear stays of the supporting frame: essentially, two or more of the rear stays of the supporting frame can be provided with their own specific, distinct and dedicated rigid shaped insert. The object of the invention can also be extended to a load-bearing frame of any bicycle, where it is considered that the wheels are not an essential component for the purposes of the technical concept of the invention but they help its intelligibility and complete its clarity.

Finally, it is clear that numerous other variants can be made to the bicycle with improved security against forced and fraudulent break-in, without departing from the novelty principles inherent in the inventive idea, just as it is clear that, in the practical implementation of According to the invention, the materials, the shapes and the dimensions of the illustrated details may be any according to the requirements, and may be replaced with other technically equivalent ones.