RU2782541C1 - Foldable personal vehicle - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of mechanical engineering, in particular to tricycles. The bicycle, made with the possibility of placing a child in it, contains a frame, a front rack, a folding rear control mechanism, a closing bracket of the front rack. The frame has front and rear sections, upper surface, front and rear ends spaced from each other along the longitudinal axis. The A-pillar has an A-pillar axle, an upper section with a handlebar, and a lower section with a front wheel. The upper and lower parts are made with the possibility of fixed attachment to each other. A foldable rear control mechanism connects the handle to the A-pillar such that manipulation of the handle causes the bottom of the A-pillar to rotate about the axis of the A-pillar to steer the tricycle. A-pillar end bracket made with the possibility of permanently attaching the top of the A-pillar to the tricycle element.

EFFECT: improved compactness.

8 cl, 23 dwg

Description

FIELD OF TECHNOLOGY

The present invention relates to folding personal vehicles, in particular in the field of children's toys and transport products.

BACKGROUND OF THE INVENTION

Well-known folding personal vehicles for both adults and children, such as scooters, carts and bicycles. In the case of a children's vehicle, it may sometimes be advantageous to be able to fold it for compact storage and transport.

There is a huge variety of such folding vehicles, based on two main principles: disassembly and folding. The first group includes vehicles dismantled into basic parts that can be compactly folded together. The second group includes vehicles in which most parts of the vehicle retain their connections, but allow two positions: the working position, in which they function as a vehicle, and the folded storage position, in which the orientation and / or position of the parts change relative to each other .

Vehicles of the aforementioned second group are described, for example, in US patent documents US 6152473, US 6530589, and at http://www.iimo-life.com/vehicle2_01.htm, the latter of which is the IIMO folding tricycle.

The invention disclosed in the present application relates to vehicles of the second group described above.

DISCLOSURE OF THE INVENTION

The present invention relates to a foldable personal vehicle having an operating position and a storage position in which it can assume an extremely compact form. The vehicle comprises a longitudinal axis lying in the vertical plane of symmetry and a horizontal reference plane perpendicular to the plane of symmetry, and in the storage position it assumes a compact shape both in the direction along its longitudinal axis and in directions perpendicular to this axis both along the plane of symmetry and and in a vertical plane perpendicular to this plane of symmetry.

According to the first aspect of the present invention, said vehicle may comprise:

- a frame containing an upper surface holding the saddle, front and rear ends spaced along the longitudinal axis, the right rear side surface and the left rear side surface located near the rear end of the frame and located at some distance from each other in the direction perpendicular to the plane of symmetry;

a front leg and a front wheel attached thereto, the front leg being at least indirectly pivotally connected to the frame near its front end to enable it to assume a working position and a storage position;

- the right rear pillar and the left rear pillar, each of which contains the end of the rack with the rear wheel farthest from the frame and the end of the rack closest to the frame, on which it is pivotally connected to the corresponding rear side surface of the frame to enable it to adopt a working position and a storage position, moreover at least one of the rear posts contains a connecting area between the end of the post closest to the frame and the end of the post farthest from the frame; and

- at least one connecting element connecting at least indirectly the front pillar with the connecting area of at least one of the rear pillars in such a way that the rotation of the front pillar between its working position and the storage position causes at least one connecting element to rotate the rear pillars along of the respective rear side of the frame between their respective operating and storage positions.

By articulating the ends of the C-pillars closest to the frame to the right and left rear side surfaces of the frame and using the aforementioned connecting area(s) and connecting element(s) for such connection, the C-pillars of the vehicle can be free from any common elements, passing between them in places located at some distance from the ends of the rear pillars closest to the frame, for pivoting the rear pillars to the frame. This provides such a large angle of rotation of the C-pillars that in the storage position of the vehicle they can assume a position in which at least a large part of the area of each C-pillar overlaps at least a large part of the area of the frame, as shown in the side view of the vehicle, thereby thereby allowing to significantly reduce the dimensions of the vehicle in this position both along the longitudinal axis of the vehicle and perpendicular to this axis along its plane of symmetry. This means that in the vehicle's storage position, each C-pillar may be completely or almost completely co-extensive with the frame along at least most of its longitudinal dimensions, e.g. that this end (not including the associated rear wheel) does not substantially protrude forward from the front end of the frame. If in this case the A-pillar is designed such that, in the storage position, the front wheel is in front of the frame, then at least the majority of each C-pillar with the corresponding rear wheel, as shown in the side view of the vehicle in the storage position, can be located between the rear end of the frame and the front wheel, thus allowing a significant reduction in the length of the vehicle in this position along its longitudinal axis.

In view of the foregoing, each C-pillar may have such a shape and width in relation to the shape and width of the frame that, in the vehicle storage position as shown in the side view, they may overlap not only along the greater part of their length as described above, but also along the greater parts of their height, i.e. in a direction perpendicular to the longitudinal axis along the plane of symmetry, allowing a significant reduction in the overall height of the vehicle in this direction in the storage position.

Articulation of each of the right and left rear pillars of the vehicle with respect to the corresponding rear side surface of the frame can be provided by means of a corresponding hinge axle, the outer section of which protrudes from the corresponding rear side surface of the frame and freely enters the through channel made in the end of the rear pillar closest to the frame , which passes between the inner and outer side surfaces of the rear pillar. Each of the hinge axles can be made in one piece with the frame or rigidly attached to it by means of the inner section of the axle. In any case, the outer section of each axis, i.e. the section protruding from the corresponding rear side surface of the frame can be configured to enter the channel from the side of the inner side surface of the rear rack at its end closest to the frame, and the free end of the axle can be rigidly connected to a stopper located near the outer side surface of the rear rack , in order to ensure that the rear pillar rotates around the axle, while preventing it from being removed from the axle. This can be done, for example, by making the cooperating end of the axle threadedly engaged with a corresponding nut forming a stopper and located in a groove made in the outer side surface of the rear pillar at its end closest to the frame.

In an alternative embodiment of the invention, each pivot pin may protrude from the inner side surface of a respective rear strut at its end closest to the frame, integral with or rigidly attached to the strut, and may be hinged within the frame at its respective rear side surface. .

The right and left hinge axes may be located at some distance from the plane of symmetry of the vehicle, or may converge with each other in this plane. In the latter case, the two hinge axles can be made as one axle, the central inner section of which is located inside the frame, and the two lateral outer sections protrude from its rear side surfaces, as described above.

The inner and outer portions of each of the pivot pins may be arranged in a straight line and run along a single rear pivot axis, or they may be arranged at an angle to each other.

The pivot pins of the two rear pillars, or at least their outer portions, may extend along their respective rear pivot pins at a non-zero angle to each other, with each pivot pin intersecting the rear side surface of the frame at a respective right and left rear hinge point.

Each rear axis of rotation of the two C-pillars may form an acute angle with respect to the reference plane, as shown in the rear view of the vehicle. This may make it possible to increase the distance between the ends of the rear pillars farthest from the frame in their working position compared to the distance that would be between the ends of these pillars farthest from the frame if the pivot axes lay in a plane parallel to the reference plane.

In a further or alternative embodiment of the invention, each of the right and left rear steering axles may be located at an acute angle to the plane of symmetry of the vehicle. In this case, the rotation of the rear pillars around the rear axles of rotation from the working position to the storage position can provide a closer location of their ends farthest from the frame to the plane of symmetry, for example, the location at the same or almost the same distance from this plane as they are from it. ends proximal to the frame, thereby increasing the compactness of the storage position of the vehicle in the direction perpendicular to the plane of symmetry.

In the case where the pivot axes form acute angles with both the plane of symmetry and the plane perpendicular to the plane of symmetry, the aforementioned compactness of the storage position is achieved despite the increased distance between the ends of the C-pillars farthest from the frame in the working position of the vehicle.

The frame may include a front frame section with its right and left front side surfaces and a rear frame section with its right and left rear side surfaces. The front right and left side surfaces may be located closer to the plane of symmetry than the rear right and left side surfaces, meaning that the rear portion of the frame may be wider than the front portion of the frame in a direction perpendicular to the plane of symmetry.

In addition, the rear frame section may have a converging configuration, as shown in at least one of its top and rear views, provided by the corresponding arrangement of the right and left rear side surfaces of the rear frame section. In this case, the inner side surface of each C-pillar near its end closest to the frame may be oriented in the same way as the corresponding rear side of the frame and have the same extent with it, so that these surfaces can be in close contact with each other as in the storage position and in the working position of the vehicle. For example, the location of each of the right and left pairs of contacting the rear side of the frame and the inner side of the C-pillar at its end proximal to the frame may be such as to provide one or both of the above-described acute angles of the right and left pivot axes, in which case these axes may be perpendicular to the respective contact surfaces.

The frame may be made in the form of a single frame or may be assembled from several elements. For example, these elements may include right and left frame halves assembled in such a way that their edges converge with each other in the plane of symmetry of the vehicle, and they form at least partially hollow internal part between them.

The A-pillar may extend along the axis of the A-pillar from the wheel end of the A-pillar associated with the front wheel to the steering end associated with the steering wheel. The axis of the front rack is configured to form an angle with the longitudinal axis of the vehicle at the working position of the rack, taken by it in the working position of the vehicle, which is significantly larger than the angle at the position of the front storage rack, taken by it in the storage position of the vehicle. In particular, the layout may be such that, in the position of the front storage rack, the axis of the front rack forms with the longitudinal axis an angle not exceeding 25 degrees, more specifically not exceeding 20 degrees, and even more specifically not exceeding 15 degrees. If necessary, the axis of the A-pillar may be parallel or nearly parallel to the longitudinal axis in the storage position of the vehicle.

The front pillar may be part of the front assembly, which further comprises a hinge element, through which the front pillar is pivotally connected to the front end of the frame with the possibility of rotation around the front axis of rotation, and which is attached to the connecting element (s). The front axis of rotation can be located at some distance from the axis of the A-pillar in such a way that when the A-pillar is in the operating position of the vehicle, the A-pillar is located in front of the frame, and when the A-pillar is in the storage position of the A-pillar in the vehicle storage position, the A-pillar is located above the frame and extends along the upper surface of the frame for at least most of the length of the A-pillar.

With the configuration described above, the A-pillar in the vehicle storage position can be positioned to be offset upwards from the longitudinal axis by a distance less than the distance to the highest point of the vehicle other than the A-pillar. This highest point may be, for example, the highest point of the front wheel and/or seat in the storage position of the vehicle.

The hinge element may include a section associated with the front pillar, which covers the front pillar in such a way that allows the front pillar to rotate around its axis, a section associated with the rear pillars, to which at least one connecting element is attached with an end opposite to the end to which it is attached to the connecting area(s) of the rear pillar(s), and a portion associated with the frame, in which the hinge element is pivotally connected to the front end of the frame.

At least one connecting element can be made of a rigid material so that its length remains constant during the operation of the vehicle and when the position of the vehicle changes. In particular, the connecting element can be rigid enough to be able, when pressed by the hinge element, to displace respectively the rear pillars from their storage position to the working position. The vehicle may comprise two such connectors, right and left, each of which connects the hinge element to the connector area of the respective right and left C-pillar.

The vehicle may further comprise pedals detachably attached to or integral with the front wheel.

In addition, the vehicle may be configured to adjust the position of the saddle along the frame.

The vehicle may be steerable by the user seated in the saddle, or steerable by the user while allowing the vehicle to be steered from behind via the control handle by another person. In this case, the vehicle may contain one or more of the following items:

- a non-solid design of the A-pillar, the upper and lower parts of which can be fixedly attached to each other to act as a single integral unit controlled by the steering wheel, and detached from each other, allowing the lower part to be controlled by a separate control mechanism that does not include the upper part, and providing the desired functionality of the upper part without affecting the control of the lower part;

- an A-pillar locking bracket for fixedly attaching at least the top of the A-pillar to a vehicle element, such as, for example, a safety frame, which is fixed in the operating position of the vehicle, to prevent the A-pillar or its upper part from pivoting about the axis of the front racks through the steering wheel;

- a collapsible rear control mechanism for use with a pivoting rear control handle when mounted at the rear end of the frame, the mechanism connecting the handle to the A-pillar, or at least the bottom thereof, such that manipulation of the handle causes the A-pillar, or the bottom thereof, to rotate around axes of the front pillar for driving the vehicle; a footrest configured to be rigidly attached at least indirectly to the frame at a point closer to the seat than the front wheel; moreover, this attachment point can be located on the hinge element, in particular, on its section associated with the frame, or on its section associated with the rear pillars, or between these two sections; wherein the footrest may be formed by the aforementioned pedals detached from the front wheel.

The vehicle may include a control mechanism of any design that rotates the lower part of the A-pillar between its operating position and the storage position. According to one example of such a design, the control mechanism may comprise the following elements:

- front rotary element, rigidly attached to the front pillar;

a rear swivel seat located at the rear end of the frame and configured to rigidly mount a rear control handle therein such that rotation of the handle about the handle axis causes the seat to rotate accordingly; and

- at least one pair of cables, including a right cable and a left cable, each of which passes between the front rotary element and the socket and is attached to them in such a way that turning the socket in different directions causes it to pull the left or right cable, which leads to rotation the front pivot member and therefore at least the lower part of the A-pillar, wherein the right and left cables are designed to bend at locations near the front pivot axis.

The right and left cables can run along and inside the vehicle frame for most of their length. The right and left cables may be parts of the same cable rigidly attached to the front pivot and pivot socket.

In accordance with another aspect of the present invention, a vehicle generally described in the first paragraph of the Disclosure section may comprise:

- a frame containing an upper surface holding the saddle, front and rear ends spaced along the longitudinal axis, the right rear side surface and the left rear side surface located near the rear end of the frame and located at some distance from each other in the direction perpendicular to the plane of symmetry;

a front leg and a front wheel attached thereto, the front leg being at least indirectly pivotally connected to the frame near its front end to enable it to assume a working position and a storage position;

- a right rear strut and a left rear strut, each of which contains the end of the strut closest to the frame and the end of the strut farthest from the frame, to which the rear wheel is attached;

- a right and left rear pivot around which the respective right or left rear pillar is pivotally connected to the respective rear side of the frame to allow for operating and storage positions, each of the rear pivots being at an acute angle to the plane of symmetry of the vehicle at top view so that the rotation of the rear pillars around the rear axis of rotation from their working position to the storage position provides a closer location of their ends farthest from the frame to the plane of symmetry, for example, the location at a smaller distance from this plane in the storage position than in the working position, and , if necessary, the location at the same or almost the same distance from this plane, at which their ends closest to the frame are located from it.

The vehicle in accordance with this aspect of the present invention may contain any of the features presented above in relation to the previously described aspect of the present invention, in any combination thereof.

In accordance with yet another aspect of the present invention, a vehicle generally described in the first paragraph of the Disclosure section may comprise:

- a frame containing an upper surface holding the saddle, front and rear ends spaced along the longitudinal axis, the right rear side surface and the left rear side surface located near the rear end of the frame and located at some distance from each other in the direction perpendicular to the plane of symmetry;

a front leg and a front wheel attached thereto, the front leg being at least indirectly pivotally connected to the frame near its front end to enable it to assume a working position and a storage position;

- a right rear strut and a left rear strut, each of which contains the end of the strut closest to the frame and the end of the strut farthest from the frame, to which the rear wheel is attached;

- a right and left rear pivot around which the respective right or left rear pillar is pivotally connected to the respective rear side of the frame to allow for operating and storage positions, each of the rear pivots being at an acute angle to the reference plane in the rear view vehicle in such a way as to provide an increased distance between the ends of the rear pillars farthest from the frame in their working position compared to the distance that would be between the ends of these pillars farthest from the frame if the axis of rotation lay in a plane parallel to the reference plane.

The vehicle in accordance with this aspect of the present invention may contain any of the features presented above in relation to the previously described aspects of the present invention, in any combination thereof.

In accordance with yet another aspect of the present invention, a vehicle generally described in the first paragraph of the Disclosure section may comprise:

- a frame containing a front section and a rear section;

a front strut pivotally connected at least indirectly to the front frame portion via a front pivot axle and holding the front wheel of the vehicle so as to pivot between a working position and a storage position;

- two rear pillars, each of which is pivotally connected to the rear section of the frame through the rear axis of rotation to enable the adoption of the working position and the storage position and holds the rear wheel of the vehicle;

- a rear pivoting control socket configured to rigidly mount a rear control handle therein for use when the vehicle is in the operating position;

- a control mechanism connecting said socket to the A-pillar in such a way that rotation of the socket by means of a handle causes at least the lower part of the A-pillar to rotate to control the vehicle when it is in the operating position, the control mechanism comprising at least one control element , passing at least partially inside the frame and made with the possibility of bending near the front axis of rotation when the front pillar is rotated from its working position to the storage position.

The control mechanism may further comprise a front pivot member rigidly attached to the front strut and a pair of bendable cables, including right and left cables and forming controls, each of which passes between the front pivot member and the socket and is attached to them in such a way that that turning the socket clockwise or counterclockwise causes it to pull on the corresponding right or left cable, which causes the front pivot and hence the A-pillar to rotate. The right and left cables can run for most of their length inside the frame, and are each designed to flex near the front pivot.

The vehicle in accordance with this aspect of the present invention may contain any of the features presented above in relation to the previously described aspects of the present invention, in any combination thereof.

In accordance with a further aspect of the present invention, the vehicle generally described in the first paragraph of the "Disclosure of the Invention" section may be convertible into a baby carriage configured to prevent a child from driving the vehicle, if necessary, and may comprise:

- a frame containing a front section and a rear section;

a front strut pivotally connected at least indirectly to the front frame portion via a front pivot axle so as to pivot between a working position and a storage position, and supporting a front wheel of a vehicle to which a pair of pedals is or can be attached;

- two rear pillars, each of which is pivotally connected to the rear section of the frame through the rear axis of rotation to enable the adoption of the working position and the storage position and holds the rear wheel of the vehicle;

wherein the vehicle further comprises any one, any two, any three, or all of the following features:

- a non-solid design of the A-pillar, the upper and lower parts of which can be fixedly attached to each other to act as a single integral unit controlled by the steering wheel, and detached from each other, allowing the lower part to be controlled by a separate control mechanism that does not include the upper part, and providing the desired functionality of the upper part without affecting the control of the lower part;

- an A-pillar locking bracket for fixedly attaching at least the top of the A-pillar to a vehicle element, such as, for example, a safety frame, which is fixed in the operating position of the vehicle, to prevent the A-pillar or its upper part from pivoting about the axis of the front racks through the steering wheel;

- a collapsible rear control mechanism for use with a pivoting rear control handle when mounted at the rear end of the frame, the mechanism connecting the handle to the A-pillar in such a way that manipulation of the handle causes at least the lower portion of the A-pillar to rotate about the axis of the A-pillar to control the transport means; and

a footrest configured to be rigidly attached at least indirectly to the frame at a point closer to the seat than the front wheel; moreover, this attachment point can be located on the hinge element, in particular, on its section associated with the frame, or on its section associated with the rear pillars, or between these two sections; wherein the footrest may be formed by pedals detached from the front wheel.

The vehicle in accordance with this aspect of the present invention may contain any of the features presented above in relation to the previously described aspects of the present invention, in any combination thereof.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to provide a better understanding of the essence of the present invention and illustrate its implementation in practice, the following is a description of embodiments of the invention as a non-limiting example with reference to the accompanying drawings, in which:

Fig. 1A is a schematic axonometric view of a folding tricycle in accordance with one embodiment of the present invention, shown in the working position;

Fig. 1B is another schematic axonometric view of the tricycle shown in FIG. 1A with the saddle assembly removed;

Fig. 1C and 1D are respective schematic front and side views of the tricycle shown in FIG. 1A;

Fig. 1E and 1F are respective schematic top and rear views of the tricycle shown in FIG. 1A-1E;

Fig. 1G shows the same top view of the tricycle as shown in FIG. 1E, but without saddle and safety frame;

Fig. 1H shows the same axonometric view of the tricycle as shown in FIG. 1B, but with C-pillars detached;

Fig. 2A-2E show schematically the folding process of the tricycle shown in FIG. 1A-1E to bring it out of the working position shown in FIG. 2A to the storage position shown in FIG. 2E;

Fig. 3A is a schematic plan view of the tricycle shown in FIG. 2E;

Fig. 3B is a schematic top view of the frame and rear legs of the tricycle shown in FIG. 3A;

Fig. 3C is a schematic side view of the tricycle shown in FIG. 2E;

Fig. 3D shows the same view of the tricycle as shown in FIG. 3C, but without the right C-pillar and wheel;

Fig. 3E shows the same view of the tricycle as shown in FIG. 3C, but without front assembly and rear wheels;

Fig. 4A and 4B are perspective and side views, respectively, of a folding tricycle in accordance with another embodiment of the present invention;

Fig. 5A and 5B are schematic perspective and exploded views, respectively, of a folding tricycle in accordance with another embodiment of the present invention;

Fig. 5C is a perspective view of the tricycle shown in FIG. 5A with pedals forming footrests.

IMPLEMENTATION OF THE INVENTION

The drawings listed above show a number of children's tricycles, each of which is referred to as a "vehicle" throughout the description, including vehicle 1 shown in FIG. 1A-3E, the vehicle 100 shown in FIG. 4A and 4B and the vehicle 200 shown in FIG. 5A-5C. Each of the vehicles 1, 100 and 200 has a longitudinal axis L lying in the plane of symmetry SP of the vehicle and is foldable between its

- an operating position in which the vehicle can be driven along a plane perpendicular to the plane of symmetry and referred to herein as the reference plane RP, and

- a storage position in which the vehicle can be freely stowed on the reference plane RP in such a way that the longitudinal axis L forms an angle LR with this plane, which does not exceed, or at least does not substantially exceed, the angle formed between them in the operating position of the vehicle .

The longitudinal axis, symmetry plane, reference plane, and storage position of the vehicle are shown in the drawings only with respect to vehicle 1, and the description of vehicle 1 is fully applicable to vehicles 100 and 200.

As shown in FIG. 1A, the vehicle 1 comprises a rigid frame 10, a saddle assembly 30, a front assembly 50 with a front wheel W _F containing pedals P, right and left rear pillars 70 _R and 70 _L with respective rear wheels W _RR and W _RL , and a coupling mechanism 90. Because the rear pillars and their rear wheels are of identical construction, the rear pillars in figures other than FIGS. 1A have one reference numeral 70 and their wheels are designated W _R in the following.

As shown in FIG. 1B and 1G, the frame 10 comprises a front frame section 11 _F including a front frame end 12 _F and a rear frame section 11 _R including a rear frame end 12 _R , wherein the front and rear frame sections have a fixed relative position both in the working position and and in the storage position of the vehicle. The frame may be made in the form of a single frame or may be assembled from several elements.

As shown in FIG. 1B, the frame 10 includes an upper surface 13 facing up or away from the reference plane RP, a bottom surface 14 facing down or toward the reference plane RP, right and left front side surfaces 15 _F extending between the front portions of the upper and lower surfaces of the frame. and defining a front frame portion 11 _F and right and left rear side surfaces 15 _R extending between the rear portions of the upper and lower frame surfaces and defining a rear frame portion 11 _R to which the rear pillars 70 are hinged. As best seen in FIG. 1G, the right and left front side surfaces 15 _F of the frame 10 are located closer to the plane of symmetry SP than the right and left rear side surfaces 15 _R , which means that the rear frame section 11 _R is wider than the front frame section 11 _F in the direction perpendicular to planes of SP symmetry.

As best seen in FIG. 1A and 1C, the saddle assembly 30 includes a saddle 32 mounted on the upper surface 13 of the frame 10 so as to be supported at least partially by the rear portion 11 _R of the frame. The saddle assembly can be configured to be installed in one of at least two different positions along the frame with different degrees of coverage by the saddle area of the upper surface of the rear section 11 _R of the frame.

In addition, the saddle assembly 30 includes a backrest 34 having a fixed backrest portion 35 assembled in one piece or made in one piece with the saddle 32, and a folding backrest portion 37. The backrest section 37 is rotatable about an axis X _BR which is parallel to the reference plane RP and spaced from the seat 32 at a distance of the fixed backrest section 35, between the generally vertical orientation of the backrest section 37 in the operating position of the vehicle 1 and the generally horizontal orientation of the section 37 backrests in the vehicle storage position. In addition, the back portion may be configured to take on at least two different vertical positions to enable selection of a more comfortable back support for the occupant/user in the operating position of the vehicle.

In addition, the saddle assembly 30 optionally includes a safety frame 36, which in the present example can be pivoted about the same X _BR axis as the backrest pivot portion 37 between its generally horizontal working orientation, in which it can to prevent the child seated in the saddle 32 from falling off the vehicle 1, and the generally vertical non-working orientation used in the vehicle folding process. The safety frame can be made with the possibility of detachable attachment to the vehicle.

The saddle can be made without a fixed section and/or safety frame, and the folding section of the backrest can contain different axes around which they can be rotated, and the pivoting axis of the backrest is located closer to the saddle than the pivoting axis of the safety frame, in the working position of the vehicle. The backrest can be made of a rigid material or made in the form of a fabric covering that is put on the back frame (not shown) and can be hinged to the saddle without the possibility of removal or attached to the saddle with the possibility of removal when it is necessary to bring the vehicle into the working position.

Further with reference to Fig. 1B, 1F, 1G and 1H describe in more detail the rear frame portion 11 _R and how the rear legs 70 are hinged thereto.

The rear frame portion 11 _R has a converging configuration as shown in its top (FIG. 1G) and rear (FIG. 1F) views due to the respective positioning of the right and left rear side surfaces 15 _R . In particular, these surfaces 15 _R are inclined so as to be closer to each other in the direction opposite to the rear end 12 _R of the frame (FIG. 1G) and in the direction opposite to the reference plane RP (FIG. 1F).

As shown in FIG. 1H, each rear side surface 15 _R of the frame 10 comprises a pivot pin 16 rigidly attached to the rear portion 11 _R of the frame (only the right axle is visible) such that its outer portion 18 with the free end 19 protrudes from the rear side surface to be held thereon. of the respective rear strut 70. Each outer portion 18 of the hinge pin 16 extends along a respective pivot axis X _RP perpendicular to the respective rear side surface 15 _R and intersecting this surface at the rear hinge point P _RA (only one such point is visible). The rear hinge points P _RA of the two rear, left and right, side surfaces 15 _R can be arranged in such a way that an imaginary line connecting them intersects the longitudinal axis L of the vehicle (not shown).

The rear side surfaces 15 _R are arranged in such a way that the rear axes X _RP perpendicular to them form the required angles with the reference plane RP. In particular, as shown in FIG. 1F, each of the rear pivot axes X _RP forms an acute angle α with the reference plane RP. This makes it possible to provide an increased distance S between the ends of the rear pillars farthest from the frame in their working position compared to the distance that would be between the ends of these pillars farthest from the frame if their axis of rotation X _RP lay in a plane parallel to the reference plane RP. Moreover, as seen in FIG. 1G, each pivot axis X _RP is located at an acute angle β with respect to the vehicle symmetry plane SP. In this case, the rotation of the rear pillars around the rear axles X _RP of rotation from the working position to the storage position ensures that their ends farthest from the frame are located closer to the plane of symmetry so that they are located at the same or almost the same distance from this plane, at which the ends of the rear pillars closest to the frame are located from it, despite the above-mentioned increased distance between the ends of the rear pillars farthest from the frame. Moreover, in fact, due to the above-described angle β, the ends of the C-pillars farthest from the frame in the position of the storage posts can even be closer to each other than their proximate ends of the frame, thereby improving the compactness of the storage position of the vehicle in the direction perpendicular to the plane symmetry, as described in more detail below with reference to FIG. 3A and 3B.

As shown in FIG. 1B, 1G, and 1H, each of the rear legs 70 has an elongated working portion 72 comprising a frame proximal end 74, a frame distal end 76 carrying a rear wheel W _R , and a connection region 78 (only one is visible in FIGS. 1B and 1H). ) between the end of the post closest to the frame and the end of the post farthest from the frame, connected to the connecting mechanism 90 (better seen in Fig. 1A). In addition, each C-pillar 70 includes a C-pillar outer surface 75 facing away from the frame and an C-pillar inner surface 77 facing the frame and including a connection region 78.

Each of the rear pillars 70 contains, near its end closest to the frame, a through channel 79, which passes between the inner and outer side surfaces 77 and 75 of the rear rack and is configured to accommodate the outer section 18 of the hinge axis 16 from the side of the inner side surface of the rack and stopper (not shown) on the side of the outer side surface of the rack, made with the possibility of rigid connection with the free end 19 of the axle 16, so as to allow the rear rack to rotate around the axle, while preventing its removal from the axle.

The inner surface 77 of each rear strut at the end of the strut proximal to the frame is oriented in the same way as the corresponding rear side surface 15 _R of the frame 10, and has the same extent with it, so that these surfaces can be in close contact with each other as in position storage, and in the working position of the vehicle.

In the operating position of the vehicle, the rear pillars 70 have an operating orientation in which the rear wheels W _R are located at the maximum distance from the front wheel W _F along the plane RP. The X _WR axes of the rear wheels W _R are aligned in the working position of the rear pillars 70, allowing the two rear wheels W _R to move together while being parallel to each other in the working position of the vehicle 1.

As shown in FIG. 1D, the front assembly 50 includes a front strut 52 extending along the front strut X axis _FB lying in a plane of symmetry SP and having a wheel end 52A associated with the front wheel W _F , and a steerer end 52B associated with the handlebar 57. Front strut 52 with the steering wheel 57 can be made with the possibility of rotation around the axis X _fb of the front pillar to control the vehicle 1. In the working position of the front pillar 52, its steering end 52B is located at the maximum distance from the reference plane RP.

As shown in FIG. 1E, the steering arms 58 of the steering wheel 57 in the operating position extend generally transversely to the plane of symmetry SP of the vehicle so that their ends are located at the maximum distance from the A-pillar 52 and the plane SP, and each of them is rotatable about an axis. X _HB of a steering handle extending generally parallel to the plane SP so that, in the storage position of the handlebars 58, their ends can be located at a minimum distance from the plane of symmetry SP.

The wheel end 52A of the A-pillar 52 includes a fork 54 pivotally holding the front wheel W _F . Each pedal P is supported by a respective pedal axle 53 mounted on the front wheel by means of a hole made in the fork 54 through which it passes freely. Each pedal is rotatable between an operating position, in which it is positioned transverse to its pedal axis 53, and a storage position, in which it is coaxial with that axis. Pedals with their axles can be made with the possibility of detachment from the front wheel.

As shown in FIG. 1C, the front assembly 50 further comprises a hinge element 60 for articulating the A-pillar 52 to the front end 12 _F of the frame 10 about a front pivot axis X _FP that is perpendicular to the symmetry axis SP (and parallel to the reference axis RP) and intersects each side surface 15 of the front frame section 10 at the front pivot point P _F . The front pivot axis X _FP intersects the longitudinal axis L of the vehicle.

Hinge member 60 comprises frame-associated portion 62, which is pivotally connected to the front frame portion with the possibility of rotation about the front pivot axis X _FP , an A-pillar-associated portion 64, which is connected to the A-pillar 52 along its section located between the two ends of the A-pillar , and the section 66 associated with the rear pillars, which is part of the connecting mechanism 90. The section 64 associated with the front pillar and the section 66 associated with the rear pillars are made in such a way that in the working position of the hinge element 60, the section 64 associated with the front pillar is located in front of the associated with frame section 62, and the C-pillar-associated section 66 is located closer to the reference plane _RP than the frame-associated section 62. 64 is made in the form of a sleeve, inside which is placed the front rack a 52 in such a way that it can rotate inside this sleeve.

The hinge element 60 can be equipped with a locking device containing a button 61, which blocks the connection of the hinge element 60 with the frame 10 at least in the operating position of the vehicle and unlocks this connection by pressing the button 61 only if it is necessary to change the position of the vehicle and rotate the hinge element 60 around the front axis X _FP rotation.

As shown in FIG. 1A, 1F and 1H, the hinge element 60 connects the front pillar 52 to the connecting regions 78 of the rear pillars 70 via two longitudinal connecting elements or rods 92, each of which includes a front connecting end 92A attached to one side of the hinge element associated with the rear pillars 66 60 in such a way as to allow rotation of the connecting element 92 relative to the section 66 associated with the rear pillars about the front connecting axis X _fc , and the rear connecting end 92B attached to the connecting region 78 of one of the rear pillars 70 in such a way as to allow the connecting element 92 to rotate relative to C-pillar 70 around the rear axle X _RC . The connecting elements 92 are made of a rigid material so that their dimensions remain unchanged during operation.

In FIG. 2A-2E show the process of folding the vehicle 1 from the operating position shown in FIG. 1A-1F and in FIG. 2A to the storage position shown in FIG. 2E, 3A and 3C. In FIG. 1A-1F and 2A, the vehicle is shown in a working position in which it can be driven along a plane, i.e. reference plane RP (shown in FIG. 1F), and in FIG. 2E, 3A and 3B the vehicle is shown in a storage position in which it can be freely stowed on such a plane so that its longitudinal axis forms an angle with that plane which does not exceed the angle formed between them in the working position. This process is described below with reference to the axes about which the elements of the vehicle 1 rotate when brought from the operating position to the storage position, and as shown in FIG. 2A, these axes are the following axes:

- axis X _HB steering handles, around which the steering wheel 57 is rotated to bring it from the working position shown in Fig. 2A, in which the handlebars 58 are located at the maximum distance from the A-pillar 52 and from the plane of symmetry SP, to the storage position shown in FIG. 2B, in which the handlebars 58 are located at a minimum distance from the A-pillar 52 and from the plane of symmetry SP;

- axis X _BR of the back, around which

(a) rotate the safety frame 36 between its operating position shown in FIG. 2A, which is also its storage position shown in FIG. 2E and in which it forms a minimum angle with the reference plane RP and its vertical position shown in FIG. 2B in which it forms a maximum angle with the reference plane RP; and

(b) pivoting the pivoting backrest portion 37 from its operating, generally vertical, position shown in FIG. 2A, in which this portion forms a maximum angle with the reference plane, to its storage position, generally horizontal, shown in FIG. 2E in which it forms a minimum angle with the reference plane;

a front pivot axis X _FP around which the A-pillar 52 is rotated clockwise (CW) by means of the pivot member 60 from its operating position shown in FIG. 2A, in which it forms a maximum angle with the longitudinal axis L and the reference plane RP, to its storage position shown in FIG. 2D in which it forms a minimum angle with the longitudinal axis L and the reference plane RP; in fig. 2C shows the intermediate position of the A-pillar 52 during the rotation described above before reaching the storage position;

- the rear axles X _RP of rotation (of which only one is visible), around which the rear pillars 70 pivot when they are pulled by the hinge element 60 by means of the respective connecting elements 92, from the working position of the rear pillars shown in FIG. 2A, in which the rear wheels are located at the maximum distance from the front wheel W _F , to the storage position shown in FIG. 2E, in which the rear wheels W _R are located at a minimum distance from the front wheel W _F ; since the front pillar 52 and the rear pillars 70 are connected to each other by the coupling mechanism 90, clockwise rotation of the front pillar about the front pivot axis X _FP causes a similar clockwise rotation of each of the rear pillars about their respective axis X _RP;

- a front connecting axis X _FC around which each connecting element 92 rotates relative to the hinge element 60; and

a rear connecting axle X _RC (not shown in FIGS. 2A-2E) about which each connecting member 92 rotates relative to the rear pillar 70 when the front pillar and rear pillars are rotated as described above.

Thus, when the vehicle 1 is folded from the operating position to the storage position, first the handlebar is brought to the storage position and the safety frame is brought to the vertical position, as shown in FIG. 2B, then the front upright and back uprights are rotated to their storage position as shown in FIG. 2C and 2D; then the backrest is rotated to its storage position, and at the same time or thereafter, the safety frame is rotated to the horizontal position as shown in FIG. 2E. In addition, the pedals P are folded down to save space when the vehicle is stowed. The vehicle can then be returned to its operating position by performing the above steps in reverse order.

As shown in FIG. 3B, due to the angle 2β between the rear pivot axles X _RP , pivoting the rear pillars 70 about these axles moves their ends 76 further from the frame closer to the plane of symmetry SP than their ends closer to the frame, providing a compact structure of the vehicle 1 in the storage position, so that its width T _F in the area of the front end of the frame does not exceed or at least significantly does not exceed its width T _R in the area of the rear end of the frame (FIG. 3A). It should also be noted that in the storage position of the vehicle 1, the X _WR axes of the rear wheels are at an angle to each other, as can be clearly seen in FIG. 3A.

As shown in FIG. 3A and 3E, due to the fact that each of the C-pillars is separately hinged to the corresponding side of the rear section of the frame, the angle of rotation of the C-pillars from their working position to the storage position is so large that in the storage position, the end of each C-pillar farthest from the frame is located side by side. with the front end of the frame and does not protrude significantly forward beyond this end. Thus, as shown in FIG. 3C, in the vehicle storage position, as seen in the side view, each C-pillar and its associated rear wheel are positioned primarily between the rear end of the frame and the front wheel, thereby reducing the length of the vehicle at that position along the reference plane.

In addition, as shown in FIG. 3E, each C-pillar 70 is shaped and wide relative to the shape and width of frame 10 such that, in the vehicle storage position, they can overlap each other, as seen in side view, not only along most of their length as described above, but and along most of their height, allowing the A-pillars 70 not to protrude downward beyond the frame in the vehicle storage position.

As shown in FIG. 3D, because the A-pillar X axis _FB does not coincide with the pivot X _FP axis, i.e. the A-pillar 52 is displaced by a distance OS relative to the front axis X _FP of rotation due to the hinge element 60, the rotation of the A-pillar 52 allows it to be positioned in the vehicle storage position in such a way that its axis X _FB forms an extremely small angle γ with the longitudinal axis L, and its steering end 52B is located above the seat 32, being so low that it is separated from the reference plane RP by a distance that at least does not exceed the distance between the reference plane RP and the highest point of the front wheel W _F . In the present example, the above-described structure allows the backrest folding portion 37 to clamp the steering end 52B from above.

In addition, as shown in FIG. 3D, in the vehicle storage position, the front wheel W _F and the rear wheels W _R (only the left one is shown) do not protrude downwardly beyond the bottom surface 14 of the frame 10.

In FIG. 4A and 4B show a vehicle, generally designated 100, which is configured to be used both as a vehicle in which a child can ride alone and as a stroller in which the entire A-pillar 52 can be controlled by another person, for example , adult, from the rear of the vehicle. Components of the vehicle 100, similar to those of the previously described vehicle 1, have the same reference numbers. In addition, the vehicle 100 includes a rear control handle 80 and a rear control mechanism for converting the rotational movement of the handle 80 into the rotational movement of the front pillar 52.

In particular, the control mechanism includes a front rotary element 86 (shown schematically in dotted lines in Fig. 4B), rigidly attached to the front pillar 52 and made with the ability to rotate with it, a rear socket 87 located inside the rear section of the frame and made with the ability to rotate control handle 80, and right and left cables 84 extending between the front pivot member and the rear socket within the frame 10, as shown schematically in dashed lines in FIG. 4B, and rigidly attached at one end to the front rotary element 86 from its two diametrically opposite sides, and at its other end to the rear socket 87 from its two corresponding diametrically opposite sides.

The arrangement is such that, by rigidly attaching the cables 84 to the front member 86 and the rear socket 87, pulling on one of the cables 84 causes the front member 86 to rotate about the longitudinal axis X _FB of the front strut 52, thereby causing the front strut to turn, allowing the vehicle to be steered.

The cables are made of a flexible material, which may be of the same type used for bicycle brake cables, allowing them to flex near the front pivot axis X _FP when the vehicle 100 is folded from the operating position to the storage position.

In FIG. 5A shows a vehicle 200 that can also be used as a vehicle that a child can ride on their own, or as a pushchair controlled by a rear control handle (not shown) by another person. The vehicle 200 generally contains the same components as the previously described vehicles 1 and 100, differing only from some of the components of the vehicle 200, and these components are shown in more detail in FIG. 5B with respect to one particular embodiment. However, it should be understood that these components may be generally implemented in other ways. In addition, FIG. 5B should not be considered to represent all the details of these components, but only those described below and have reference numerals corresponding to those used in the description of vehicles 1 and 100, with the addition of the number 200. It should also be noted that FIG. 5B does not show standard or obvious structural elements. In addition, it should be understood that most of the elements shown in this exploded view refer to the right side of the vehicle 200 (which is best seen in Figs. 5A and 5B), which is a mirror image of the left side of the vehicle 200, so that unless otherwise noted, items shown on the right side of the vehicle are also present on the left side of the vehicle.

Thus, vehicle 200 comprises a hollow body having right and left body parts 210, each of which includes front and rear outer surfaces 215 _F and 215 _R (only visible on right body part 210), as well as front and rear inner surfaces 215 _F ' and 215 _R ' (only visible on the left body part 210 in Fig. 5B). When the body parts 210 are brought together along their edges, as shown in FIG. 5A, they form a frame 210, wherein the front side surfaces 215 _F of the two body parts form a front frame section 211 _F between them, and the rear side surfaces 215 _R of the two body parts form a back frame section 211 _R between them. In the present example, the front and rear frame portions are spaced apart from each other by an intermediate frame portion 211 _Int , the outer and inner surfaces of which (not indicated) are located between the respective front and rear side surfaces 215 _F and 215 _R , as well as the front and rear inner surfaces 215 _F ' and 215 _R ', respectively.

As seen in Figs. 5 In the right body portion 210 and the left C-pillar 270, the rear outer surfaces 215 _R of the two body portions refer to a protrusion 217 that is part of the rear frame portion 211 _R , which is formed such that the surface is positioned as described above with reference to the rear surface 15 _R of the vehicle 1. Each protrusion 217 rigidly holds the hinge axle 216, the outer section 218 of which is located perpendicular to the rear outer surface 215 _R and contains a free end 219.

As shown in FIG. 5B, each of the right and left rear pillars 270 includes an outer surface 275 of the rear pillar and an inner surface 277 of the rear pillar, as well as a through channel 279 passing between them and configured to receive the outer section 218 of the hinge axis 216 from the side of the inner side surface. 277 rack and stopper 310 from the side of the outer side surface 275 of the rack, made with the possibility of being placed in the groove 312, which ends the channel 279, and the possibility of rigid connection with the free end 219 of the axis 216, so as to allow the rear rack to rotate around the axis, preventing while removing it from the axle.

As shown in FIG. 5B, each rear post 270 includes, on an inner side surface 277, a connection region 278, which in the present example is a pin protruding from that surface and configured to attach thereto the rear connection end 292B of one of the two longitudinal connecting rods 292 so that to rotate the connecting rod 292 relative to the rear pillar 270. In addition, each connecting rod 292 includes a front connecting end 292A attached to the hinge element 260, which is part of the front node 250.

As shown in FIG. 5B, hinge member 260 includes:

- associated with the rear pillars section 266, which is part of the connecting mechanism 290 (not indicated) and contains two sides, to which the connecting rods 292 are pivotally attached with their front connecting ends 292A;

- associated with the frame section 262, pivotally connected to the front section 211 _F of the frame (shown in Fig. 5A); and

an A-pillar-associated portion 264 within which the lower portion 252A of the A-pillar 252 is rotatably located such that the upper portion 252B of the A-pillar is not directly connected to the hinge member.

The top and bottom portions 252A and 252B of the A-pillar 252 are assembled together such that, being fixed to each other by means of a fastening element 320 (shown in FIGS. 5A and 5B), they are rigidly connected to each other to form a single integral unit of the A-pillar, and when detached from each other, they become operatively disengaged, allowing the bottom to control the rear control mechanism described in more detail below, and allowing the top to either be stationary or rotate independently of the bottom.

As shown in FIG. 5B, vehicle 200 includes right and left locking mechanisms for locking hinge member 260 in its operative position, both of which operate along a front pivot axis X _FP , and each includes:

- a spring-loaded locking element 265 containing a system of protrusions around the perimeter (the spring is separately designated under the number 267);

- a locking groove 268, made on the front inner surface 215 _F ' of the corresponding body part 210 (seen in the left body part in Fig. 5B) and containing a circumferential system of depressions corresponding to the system of protrusions of the locking element in order to ensure proper placement in the locking groove of the spring-loaded locking element 265 in working position;

- a hinge groove 271 made in the frame-associated section 262 of the hinge element 260 on its side facing the corresponding body part, and containing a circumferential system of depressions corresponding to the system of protrusions of the locking element 265; wherein the hinge slot 271 permanently receives the spring 267 and the locking member 265, and is configured to allow the locking member to enter deeper into the hinge slot when subjected to an axial pressing force and correspondingly compressed by the spring;

a button 261 comprising teeth 281 and suitably formed through holes 283 made in the body portion 210 so as to extend between its inner and outer front surfaces 215 _F ' and 215 _F , the through holes being configured to receive button teeth 281 and when the button is in its outermost position at the operating position and storage position of the vehicle 200, and when it is pressed into its innermost position to apply an axial pressing force with its teeth 281 to the spring-loaded locking member 265; and - a cover 299 covering the frame-associated portion 262 and the A-pillar-associated portion 264 of the hinge member 260, and containing an opening 285 for receiving a button 261 so as to allow the user to access the button to press it when needed.

Thus, in the operating position of the vehicle 200, the spring-loaded locking elements 265 are in their locking position, and each of them is located in the locking slot 268 and protrudes into the hinge slot 271 by a minimum distance. When the vehicle 200 is to be moved from the operating position to the storage position, the right and left locking mechanisms are operated simultaneously to unlock the hinge member 260 and thus allow it to rotate about the front axis X _FP from its operating position to the storage position, as described above. with reference to vehicle 1.

The unlocking is initiated by pressing the right and left buttons 261, thereby ensuring that the teeth 282 apply an axial pressing force to the locking elements 265, causing them to move out of the locking slot 268 into the hinge slot 271 to the maximum distance. In this unlocked position, the locking elements 265 can no longer prevent the hinge element 260 from rotating relative to the frame 210, and they rotate with the hinge element 260 and remain engaged with it until the hinge element 260 with the locking elements 265 is rotated back into its operating position and thereby not align the locking elements with the locking slots 268. Upon reaching this alignment, the corresponding spring 267 pushes its locking element 265 back into the locking position within the locking slot 268.

In addition, vehicle 200 includes a rear control mechanism for use with handle 80 (not shown in FIGS. 5A and 5B) as described with respect to vehicle 100 shown in FIGS. 4A and 4B, converting the rotational movement of the handle into the rotational movement of the front post 252. The control mechanism includes:

- a front swivel element 286 located inside the hinge element 260 associated with the front pillar 264, which is rigidly attached to the front pillar 252 and is rotatable with it;

- rear socket 287, containing the right and left cables 284, rigidly attached at one end to the rear socket, and with its other end to the front rotary element 286 in such a way that pulling one of the cables 284 causes the front rotary element 286 to rotate together with the front pillar 252 providing the ability to control the vehicle;

- a rear socket cup 289, the inside of which merges with the cable channel (not indicated), this cup (shown assembled with the left body part) is fixed inside the rear section 211 _R of the frame so as to receive the rear socket 287, allowing it to rotate when handle 80, and the cables 284 pass through the cable channel through the inside of the frame 210 to the front member 286.

To enable bending of the right and left cables 284 when folding the vehicle from the working position to the storage position by rotating the hinge element 260 together with the front pillar 252 and the front element 286, the cables pass inside the frame 210 in such a way that each of them passes between the teeth 281 of the corresponding right or left button 261, allowing the teeth to fix the locations of the cables in which they are to be bent.

In addition, the vehicle 200 includes a front strut locking brace 300 attached to the safety frame 236 to permanently connect the top 252B of the front strut 252 to the safety frame 236 when it is in the operative position (as shown in FIG. 5B), providing a fixed position this part when operating the lower part of the A-pillar.

Finally, the pedals P of the vehicle are configured to be mounted both on the front wheel W _F as described above and shown in FIG. 5A, allowing the vehicle to be steered by a child on it, and to the hinge member 260 in the C-pillar-associated portion 266, as shown in FIG. 5C to provide a step closer to the seat assembly 30 than the front wheel W _F and thus enable the vehicle 200 to be used as a sidecar. The saddle assembly 30 can be configured to be mounted in at least two positions, one of which is shown in FIG. 5A and 5C, and another (not shown) is closer to the A-pillar 252.

Claims (12)

1. Tricycle, made with the possibility of placing a child in it, containing: - a frame having a front and rear sections, an upper surface holding the saddle, front and rear ends located at a distance from each other along the longitudinal axis; - a front pillar having an axle of the front pillar, an upper part with a steering wheel and a lower part with a front wheel; the upper and lower parts are designed to be fixedly attached to each other in order to act as a single integral unit, at least steerable, and detachable from each other so that the lower part can be controlled by a separate control mechanism independently from the top; - a collapsible rear control mechanism for use with a pivoting rear control handle, when mounted at the rear end of the frame, which mechanism connects the handle to the A-pillar in such a way that manipulation of the handle causes at least the lower part of the A-pillar to rotate about the axis of the A-pillar for steering tricycle; and - an A-pillar locking bracket for fixedly attaching the A-pillar top to a tricycle element fixed relative to the frame, at least when the tricycle is in use, to prevent the top from turning around the A-pillar axis by means of the handlebar. 2. The tricycle according to claim 1, further comprising a pair of pedals configured to be mounted on said front wheel and mounted at least indirectly on the frame at a location closer to the saddle than the front wheel, at least when the top of the A-pillar fixedly attached by said locking bracket. 3. Tricycle according to claim. 1 or 2, in which the tricycle element, made stationary relative to the frame section, at least when the tricycle is used, is formed by a safety frame, configured to have a working position, at least when the child is sitting in the saddle , wherein the frame is located above the saddle and extends at least partially along it to prevent the child from falling off the tricycle. 4. The tricycle according to claim 3, wherein said safety frame is configured to have a non-working position different from the working position. 5. The tricycle of claim 4, wherein said safety frame is pivotable between a substantially horizontal operating position and a substantially vertical non-operating position. 6. A tricycle according to claim 3 or 4, wherein the safety frame is detachably attached at least indirectly to the frame. 7. Tricycle according to paragraphs. 3, 4, or 5, wherein said A-pillar locking bracket is configured to rigidly connect said safety frame, when in operating position, to the clamping area of the A-pillar top, allowing said part to have a fixed position when operating the A-pillar bottom. 8. The tricycle according to claim 7, wherein the clamping area of the front pillar is located between the handlebars.

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