Handlebar stem, vehicle

Abstract

Handlebar stem (1) for connecting a handlebar (2) to a fork steerer (3) of a vehicle (100), in particular a bicycle, wherein a base body (7) of the handlebar stem (1) has an opening (4), wherein at least one insert (5.1, 5.2) is arranged in the opening (4), wherein the insert (5.1, 5.2) can be arranged in a first rotational position (A) and in a second rotational position (B) in the opening (4), wherein in the first rotational position (A) a receptacle (6) for receiving the handlebar (2) in a first position (I) is arranged and in the second rotational position (B) the receptacle (6) for receiving the handlebar (2) in a second position (II) is arranged, wherein the first position (I) and the second position (II) are spaced apart from each other along the direction of travel (F) of the vehicle (100), wherein the insert (5.1), in particular on at least one side surface extending substantially perpendicular to the direction of travel (F), in particular on a concave side surface, a recess (9) open on one side is formed, in particular a groove, into which a raised section (8) arranged on the handlebar (2) engages in the first position (I) and in the second position (II).

Description

[0001] The invention relates to a handlebar stem for connecting a handlebar to the steerer tube of a vehicle, in particular a bicycle. The invention further relates to such a vehicle.

[0002] The handlebar stem, as the connecting element between the handlebars and the fork steerer tube, is part of a bicycle's handlebars. Typically, the handlebars are clamped to a clamp in a recess on the stem. The stem, in turn, is connected to the fork steerer tube, for example, by clamping, which is rotatably mounted to the headset within the bicycle's head tube.

[0003] Essential for safe and comfortable cycling is an ergonomic riding posture. Modern technology offers numerous ways to adjust a bicycle to achieve a good riding position. These include saddle height adjustment, saddle tilt adjustment, crank arm length adjustment, and handlebar height and angle adjustment.

[0004] Especially during childhood and adolescence, the body is constantly changing, so the bicycle must be regularly adjusted to maintain good posture while cycling. It has become clear that the existing options for adjusting the bicycle to the cyclist's body are insufficient. In particular, there is a lack of easy adjustability of the handlebar position along the direction of travel.

[0005] It is therefore an object of the present invention to provide a handlebar stem and a vehicle, in particular a bicycle, which does not have the disadvantages of the prior art described above, but offers the possibility of adjusting the position of the handlebar without great effort.

[0006] This problem is solved by the subject matter of claim 1 and claim 17. Advantageous embodiments and further developments of the invention are disclosed in the dependent claims, the description, and the figures.

[0007] The handlebar stem according to the invention for connecting a handlebar to the steerer tube of a vehicle, in particular a bicycle, has a base body in which an opening is incorporated. At least one insert is arranged in the opening. The insert can be placed in the opening in a first rotational position or in a second rotational position. In the first rotational position, a receptacle for receiving the handlebar is arranged in a first position. In the second rotational position, the receptacle for receiving the handlebar is arranged in a second position. The first position and the second position are spaced apart from each other along the direction of travel of the vehicle.

[0008] This makes it advantageously possible to shift the mount along the direction of travel and thus shift the handlebars along the direction of travel by rotating the insert.

[0009] A bicycle within the meaning of the present invention comprises two-, three- or four-wheeled bicycles. Bicycles within the meaning of the present invention include in particular classic, non-motorized bicycles, pedelecs, e-bikes, children's and youth bicycles, kick scooters, electric scooters, balance bikes and the like.

[0010] The direction of travel of the vehicle is defined by the orientation of the handlebar stem, since the handlebar stem is correctly mounted so that the handlebar is aligned with its main direction of extension perpendicular to the front wheel of the vehicle.

[0011] According to the invention, a recess, particularly a groove, is formed on the insert, especially on at least one side surface extending substantially perpendicular to the direction of travel, and particularly on a concave side surface. In the first position and in the second position, a raised section arranged on the handlebar engages in this recess. By forming a recess, particularly a groove, which is typically surrounded on five sides and open on only one side, the recess can be designed in such a way that it is not visible from the outside, i.e., from the surrounding area. A possible lateral gap between the recess and the raised section is also not visible from the surrounding area. The connection between the recess and the raised section, or between the handlebar and the insert, or between the insert and the handlebar stem, serves to prevent the handlebar from rotating relative to the stem.This inventive design of the connection between the handlebar and the insert, or between the insert and the handlebar stem, results in a particularly visually appealing appearance on the bicycle. In particular, the anti-rotation connection is "not visible" from the surrounding area.

[0012] Preferably, the insert, in particular at least one side surface extending substantially perpendicular to the direction of travel, especially a convex side surface, has an additional raised section which, in the first position and in the second position, engages with a recess formed on the handlebar stem or on another insert. This allows the anti-rotation device and the forces generated thereby to be transferred to adjacent components.

[0013] Preferably, the raised area and / or the recessed area on the insert is formed essentially centrally on a side surface of the insert, which is oriented in a plane essentially transverse to the direction of travel.

[0014] This means that the depression is not visible from the outside, i.e., from the surrounding area, and creates a visually appealing appearance.

[0015] Particularly preferred is the raised area on a convex side surface and the recessed area on a concave side surface of the insert. This allows the contact area between the components, especially between the handlebar and the insert or between the insert and the handlebar stem, to be increased, thus enabling improved power transmission.

[0016] The raised and recessed areas are particularly preferred if they are aligned and designed in a corresponding manner, especially as a tongue-and-groove connection. This allows for a particularly stable and secure connection. In particular, forces can be effectively transmitted between the components, especially those in the rotational direction of the handlebar.

[0017] Preferably, a raised section is arranged on the concave side of the insert and preferably on the concave side of the additional insert, and recesses are arranged on the convex side of the insert, at the front edge of the opening, at the rear edge of the opening, and preferably on the concave side of the additional insert, which are designed to receive the raised section. This results in a particularly stable and secure connection.

[0018] According to a preferred embodiment of the present invention, the opening is elongated. The long axis of the elongated hole points, at least with its principal directional component, along the direction of travel of the vehicle. The direction of travel of the vehicle is that which is orthogonal to the axis of rotation of the front wheel and orthogonal to the vertical axis of the vehicle.

[0019] The insert has a concave and a convex side. The cross-section of the concave side and the cross-section of the convex side are preferably circular segments. When the insert is positioned in the opening, the concave side lies opposite the convex side along the long axis of the opening. The concave side and the convex side are connected to each other by a top and a bottom surface. The top and bottom surfaces of the insert preferably abut an upper and a lower edge of the opening.

[0020] In the first rotation position, the concave side of the insert faces in the direction of travel of the vehicle. In the second rotation position, the concave side of the insert faces against the direction of travel of the vehicle. Similarly, in the first rotation position, the convex side of the insert faces against the direction of travel of the vehicle. In the second rotation position, the convex side of the insert faces in the direction of travel of the vehicle. The first and second rotation positions thus differ in that the insert is rotated 180° around an axis of rotation that is perpendicular to the direction of travel.

[0021] A recess for the handlebar is formed between the insert and an edge of the opening. If the insert is in the first rotation position, the recess is formed between the concave side of the insert and a front edge of the opening. If the insert is in the second rotation position, the recess is formed between the concave side of the insert and a rear edge of the opening. This allows for a simple clamping mechanism for the handlebar between the base body and the insert.

[0022] The phrase "between the insert and an edge of the opening" as used in the present invention is not limited to the receptacle being arranged directly adjacent to the insert. Rather, it can also mean that the receptacle is arranged indirectly adjacent to the insert, i.e., that further components can be arranged between the receptacle and the insert.

[0023] In particular, the front and rear ends of the opening are concave. Preferably, the front and rear edges of the opening are segment-shaped. For the purposes of this invention, concave, convex, and segment-shaped refer to the projection onto a projection surface that is parallel to the direction of travel and parallel to the vertical axis of the vehicle.

[0024] According to a further preferred embodiment of the invention, a further insert is arranged in the opening. Like the first insert, this further insert has a concave and a convex side. The further insert can also be arranged in a first rotational position in the opening, in which the concave side of the further insert points in the direction of travel of the vehicle. Furthermore, the further insert can also be arranged in a second rotational position in the opening, in which the concave side of the further insert points opposite the direction of travel of the vehicle.

[0025] To position the insert in the first position, the additional insert is positioned in the first rotation position and between the insert and the rear edge of the opening. To position the insert in the second position, the additional insert is positioned in the second rotation position and between the insert and the first insert. To position the insert in a third position, the first insert is positioned in the opening in the second rotation position, i.e., with its concave side facing away from the direction of travel, and the additional insert is positioned in the first rotation position, i.e., with its concave side facing in the direction of travel. In the third position, the insert is formed between the first and second inserts. This advantageously allows the handlebar to be positioned in three different positions along the direction of travel, significantly increasing the flexibility of the handlebar stem.

[0026] A particularly preferred embodiment of the present invention is one in which the insert and the further insert are identical in shape. This not only simplifies the manufacture of the handlebar stem and its handling when adjusting the position of the handlebars along the direction of travel, but also enables a uniform, symmetrical adjustment of the handlebar position.

[0027] Alternatively, the length of the insert and the length of the additional insert are different. According to the present invention, the length of the insert and the length of the additional insert are determined along the shortest path from the concave side to the convex side of the insert and the additional insert, respectively. This advantageously allows the handlebar to be positioned in four different positions along the direction of travel. Because the insert and the additional insert are of different lengths, the handlebar receptacle in the third position is not centered in the opening, but offset by half the difference in length between the insert and the additional insert.Thus, a fourth position of the receptacle, differing from the third position, results when the insert is positioned in the opening in the first rotational position, i.e., with its convex side facing away from the direction of travel, and the second insert is positioned in the second rotational position, i.e., with its convex side facing in the direction of travel. In the fourth position, the receptacle is formed between the insert and the second insert. Preferably, the insert and the second insert differ only in length and are otherwise identical in shape. It is conceivable that the length of the insert corresponds to 1.1 to 2 times, and preferably 1.2 to 1.8 times, particularly preferably 1.25 to 1.5 times, and especially 1.3 times, the length of the second insert.It is also conceivable that the length of the additional insert corresponds to 1.1 to 2 times, preferably 1.2 to 1.8 times, particularly preferably 1.25 to 1.5 times and especially 1.3 times the length of the insert.

[0028] According to a further preferred embodiment of the present invention, the opening is provided in a base body of the handlebar stem. The base body comprises a mounting part and a front cap, and is therefore a two-part structure. The front edge of the opening is formed by a concave side of the front cap. The rear edge of the opening is formed by a concave side of the mounting part. The front cap is designed to be screwed to the mounting part. This advantageously provides a simple way to remove the insert and the further insert with the handlebar stem from the handlebar stem, to rotate the inserts, and to mount the handlebar stem in the desired position. For this purpose, the front cap is loosened and removed, and the handlebar stem with the inserts is pulled forward.The inserts and the handlebar are then inserted into the part of the opening located in the mounting part in the desired arrangement and finally clamped in place by attaching and screwing on the front cap.

[0029] It is conceivable that the front cap is screwed to the mounting part with at least four screws. Preferably, when the handlebar stem is mounted, the front cap is spaced away from the mounting part along the long axis of the opening. This ensures sufficient clearance for secure clamping of the handlebar stem.

[0030] According to a further preferred embodiment of the present invention, the insert and preferably the additional insert are made at least partially of a metal, in particular aluminum. This results in high strength and overall excellent technical reliability of the handlebar stem while maintaining a very light weight. It is conceivable that the concave side of the insert and / or the concave side of the additional insert and / or the front edge of the opening and / or the rear edge of the opening are rubberized. It is also conceivable that a rubber insert is arranged at least in a space between the handlebar and the handlebar stem. This protects the material while still ensuring a secure fit of the handlebar in the handlebar stem.

[0031] To better secure the inserts in the opening, it is preferably provided that a raised section, shaped like a nose or ridge, is arranged on the convex side of the insert and preferably on the convex side of the second insert. On the concave side of the insert, at the front edge of the opening, at the rear edge of the opening, and preferably on the concave side of the second insert, a recess, shaped like a groove or indentation, is arranged to receive the raised section shaped like a nose. This creates a positive fit between the noses and indentations, which facilitates the correct insertion of the inserts and prevents twisting and slipping in the opening.

[0032] In particular, it is provided that the raised and recessed areas on the insert(s) and at the edges of the opening are arranged centrally on opposite side surfaces, perpendicular to the direction of travel. In other words, the raised and recessed areas are not located on the outer, visible parts of the insert(s) or the opening. The raised areas can be ribs, which, however, are spaced apart from the opposite side walls perpendicular to the direction of travel. Similarly, the recessed areas can be grooves, which are also spaced apart from the opposite side walls perpendicular to the direction of travel. The raised areas are thus arranged individually and centrally on the convex sides, just as the recessed areas are arranged individually and centrally on the front and rear edges and on the concave sides. This allows for support of the insert(s) perpendicular to the direction of travel, particularly in the direction of rotation of the handlebar.Rotation and lateral displacement of the inserts are prevented, while central insertion of the inserts into the opening is facilitated.

[0033] According to a further preferred embodiment of the present invention, the insert has a length along the shortest path from its concave side to its convex side, i.e., along the long axis of the opening, which corresponds to 0.7 to 1.3 times the radius, and in particular 1.1 to 1.2 times the radius, of the receptacle. This results in an advantageous adjustment range for the position of the handlebars along the direction of travel in increments of slightly more than 1 cm.

[0034] Specifically, the handlebar stem is intended to be an Ahead stem. However, a quill stem is also conceivable.

[0035] Another object for solving the problem formulated at the outset is a vehicle, in particular a bicycle, which has a handlebar stem according to the invention.

[0036] Furthermore, a method for attaching a handlebar to a handlebar stem, in particular to a handlebar stem according to the invention, is disclosed, wherein the insert is arranged in the opening in the first rotational position and the handlebar is arranged between the concave side of the insert and the front edge of the opening, or wherein the insert is arranged in the opening in the second rotational position and the handlebar is arranged between the concave side of the insert and the rear edge of the opening.

[0037] All details, features and advantages disclosed with respect to the handlebar stem according to the invention also relate to the vehicle according to the invention and to the disclosed method.

[0038] Exemplary embodiments of the invention are explained in more detail below with reference to the figures. The figures merely illustrate exemplary embodiments of the invention, which do not limit the inventive concept. The same reference numerals denote the same components. They show schematically: Fig. 1: a schematic, perspective view of a handlebar stem according to an exemplary embodiment of the present invention; Fig. 2: a schematic exploded view of the in Fig. 1. Handlebar stem shown; Fig. 3: Different configurations of a handlebar stem according to an exemplary embodiment of the present invention in the upper row in a side sectional view with handlebars in different positions and in the lower row in a perspective view without handlebars; Fig. 4: a schematic representation of a part of a vehicle according to an exemplary embodiment of the present invention; Fig. 5: Different configurations of a handlebar stem according to an exemplary embodiment of the present invention in the upper row in a side sectional view with handlebars in different positions and in the lower row in a perspective view without handlebars; Fig. 6a: a first brief embodiment of an insert in a side view in the direction of travel and in a lateral sectional view; and Fig. 6b: a second long embodiment of an insert in a side view in the direction of travel and in a lateral sectional view.

[0039] The Fig. 1, Fig. 2, Fig. 3 and Fig. Figures 5 show schematic representations of a handlebar stem 1 according to exemplary embodiments of the present invention. The handlebar stem 1 shown is for connecting a handlebar 2 to a fork steerer tube 3 of a vehicle 100 (see Figure 5). Fig. 4), in particular for a bicycle. For this purpose, the handlebar stem 1 is clamped to the steerer tube 3. The handlebar stem 1 is shown as an Ahead stem. However, it is also conceivable that the handlebar stem 1 is a quill stem.

[0040] The handlebar 2 is clamped in a receptacle 6 of the handlebar stem 1 for fastening. To adjust the position in which the handlebar 2 is fastened along the direction of travel F of the vehicle 100, the handlebar stem 1 has an elongated opening 4. The opening 4 is formed throughout a base body 7 of the handlebar stem 1, and the long axis of the opening 4 is arranged, at least with one principal directional component, along the direction of travel F of the vehicle 100.

[0041] To attach the handlebar 2 to the handlebar stem 1, a front cap 7.2 of the base body 7 is removed from a mounting part 7.1 of the base body 7, moving it forward, i.e., in the direction of travel F. This provides access to the opening 4 along the direction of travel F. An insert 5.1, another insert 5.2, and the handlebar 2 are then inserted into the elongated opening 4. The front cap 7.2 is then placed back onto the mounting part 7.1 and screwed to it so that the handlebar 2 is clamped in a receptacle 6 of the handlebar stem 1.

[0042] Insert 5.1 and the further insert 5.2 are in the Fig. 1, Fig. 2 and Fig. In the embodiment shown in section 3, the components are uniformly formed and, in particular, have the same length. Fig. 6a and Fig. Figure 6b shows an exemplary embodiment of the insert parts 5.1 and 5.2, in which the insert parts 5.1 and 5.2 are of different lengths. The insert parts 5.1 and 5.2 each have a concave side and a convex side. The opening 4 has a front edge, which is formed by a concave side of the front cap 7.2, and a rear edge, which is formed by a concave side of the mounting part 7.1. The radii of the concave and convex sides of the inserts 5.1, 5.2 correspond to the radii of the front and rear edges of the opening 4. If the insert 5.1 or the further insert 5.2 is inserted into the opening 4 from the front, against the direction of travel F, with the convex side first, and brought to a stop at the rear edge of the opening 4, then the insert 5.1 or the further insert 5.2 rests with its convex side against the entire surface of the rear end of the opening 4, in particular against the concave side formed there.

[0043] Insert 5.1 and the additional insert 5.2 can be inserted into opening 4 in different rotational positions A, B. In a first rotational position A, the concave side of insert 5.1 or the additional insert 5.2 points forward along the direction of travel F. In a second rotational position B, the concave side of insert 5.1 or the additional insert 5.2 points backward, opposite to the direction of travel F.

[0044] In Fig. Figure 3 shows three different positions I, II, III in which the receptacle 6 for receiving the handlebar 2 can be arranged by selecting the corresponding rotational positions A, B of the insert 5.1 and the further insert 5.2. If the further insert 5.2 is first inserted into the opening 4 in the first rotational position A and the insert 5.1 is then inserted in the first rotational position B, the receptacle 6 for receiving the handlebar 2 is created in a first position I between the concave side of the insert 5.1 and the front edge of the opening 4. In this position, the handlebar 2 is furthest away from the driver of the vehicle 100 along the direction of travel F.

[0045] If the additional insert 5.2 is first inserted into the opening 4 in the first rotational position A, followed by the handlebar 2, and finally the insert 5.1 in the second rotational position B, the receptacle 6 for receiving the handlebar 2 is created between the concave sides of the insert 5.1 and the additional insert 5.2. In this third position III, the handlebar 2 is located at a moderate distance from the driver of the vehicle 100. In the embodiment shown here, the insert 5.1 and the additional insert 5.2 are of the same length. This places the receptacle 6 for the handlebar 2 in the center of the opening 4.

[0046] Finally, there is the possibility of first inserting the handlebar 2 into the opening 4 and then the further insert 5.2 in the second rotation position B and finally the insert 5.1 in the second rotation position B into the opening 6, so that the receptacle 4 for the handlebar 2 is located between the concave side of the further insert 5.2 and the rear edge of the opening 4 and thus as close as possible to the driver of the vehicle 100.

[0047] In Fig. Figure 4 shows such a bicycle 100, with a handlebar 1, a stem 2, and a fork steerer tube 3. It is clear in which direction the direction of travel F points.

[0048] In Fig. Figure 5 shows four different positions I, II, III, and IV in which the receptacle 6 for receiving the handlebar 2 can be arranged by selecting the corresponding rotational positions A and B of the insert 5.1 and the further insert 5.2. The first, second, and third positions I, II, and III are achieved by rotating the insert 5.1 and the further insert 5.2 as shown. Fig. 3 discussed, to be ordered. However, unlike the one in Fig. 3 shown embodiment, here the receiver 6 is arranged off-center in position III.

[0049] If the insert 5.1 is first inserted into the opening 4 in the first rotation position A, followed by the handlebar 2 and finally the further insert 5.2 in the second rotation position B, the receptacle 6 for receiving the handlebar 2 is also created between the concave sides of the insert 5.1 and the further insert 5.2, but in a fourth position IV, which is spaced apart from the third position III along the direction of travel F.

[0050] When the handlebar stem 1 is mounted, the front cap 7.2 is spaced apart from the mounting part 7.1. This provides sufficient clearance for securely clamping the handlebar 2. To mount and clamp the handlebar 2, the front cap 7.2 is screwed firmly to the mounting part 7.1, preferably with four screws.

[0051] To guarantee a secure and correct fit of insert 5.1 and the further insert 5.2, inserts 5.1 and 5.2 – as shown in particular in the Fig. 6a and Fig. 6b is recognizable - a raised area 8 is visible on each of the convex sides. In Fig. Figure 6a shows an example of a short form of the insert 5.1, 5.2. Fig. Figure 6b shows an example of a long form of the insert part 5.1, 5.2.

[0052] The raised section 8 is located centrally on the outer side of the convex side of the insert 5.1 or the further insert 5.2 and is specifically not designed as a rib extending across the entire width transversely to the direction of travel F, but merely as a central rib. On the concave sides of the insert 5.1 and the further insert 5.2, as well as on the front and rear edges of the opening 4, a recess 9 is arranged, which corresponds in shape and size to the raised section 8 and is designed to receive it. The recesses 9 are also located centrally on the concave sides of the inserts 5.1 and 5.2, or on the edge of the opening 4, and are not designed as a groove extending across the entire length transversely to the direction of travel F, but merely as a central groove. This ensures a central arrangement and thus a secure fit of the inserts 5.1 and 5.2 in the opening.Secondly, this prevents the inserts 5.1 and 5.2 from being pushed laterally out of the opening 4. Furthermore, a visually appealing appearance can be achieved on the outside of the handlebar by concealing the positive locking connection, in particular the tongue-and-groove joint.

[0053] It is not apparent, but preferably intended, that the handlebar stem 1 is made mostly of a metal, in particular aluminum. In particular, it is intended that the base body 7 is made of a metal. It is conceivable that the concave sides of the insert 5.1 and the further insert 5.2, as well as the front and rear edges of the opening 4, are rubberized or have a rubber insert. Reference symbol list: 1 handlebar stem 2 handlebars 3 Fork steerer 4 Opening 5.1 Insert 5.2 further insert 6 recording 7 Basic shapes 7.1 Mounting part 7.2 Front cap 8 increase 9 In-depth study 100 vehicles I first position II second position III third position A first rotation position B second rotation position F Direction of travel

Claims

[1] Handlebar stem (1) for connecting a handlebar (2) to a fork steerer (3) of a vehicle (100), in particular a bicycle, wherein a base body (7) of the handlebar stem (1) has an opening (4), wherein at least one insert (5.1, 5.2) is arranged in the opening (4), wherein the insert (5.1, 5.2) can be arranged in a first rotational position (A) and in a second rotational position (B) in the opening (4), wherein in the first rotational position (A) a receptacle (6) for receiving the handlebar (2) in a first position (I) is arranged and in the second rotational position (B) the receptacle (6) for receiving the handlebar (2) in a second position (II) is arranged, wherein the first position (I) and the second position (II) are spaced apart from each other along the direction of travel (F) of the vehicle (100), wherein the insert (5.1), in particular on at least one side surface extending substantially perpendicular to the direction of travel (F), in particular on a concave side surface, a recess (9) open on one side is formed, in particular a groove, into which a raised section (8) arranged on the handlebar (2) engages in the first position (I) and in the second position (II). [2] Handlebar stem (1) according to claim 1, characterized by , that on the insert part (5.1, 5.2), in particular on at least one side surface extending substantially perpendicular to the direction of travel (F), in particular on a convex side surface, an additional elevation (8) is formed which in the first position (I) and in the second position (II) engages with a recess (9) formed on the handlebar stem (1) or with a further insert part (5.1, 5.2). [3] Handlebar stem (1) according to one of claims 1 or 2, characterized by, that the elevation and / or the depression (9) on the insert (5.1, 5.2) is formed substantially centrally on a side surface of the insert (5.1, 5.2) which is oriented in a plane substantially transverse to the direction of travel (F). [4] Handlebar stem (1) according to one of the preceding claims, characterized by , that the raised area (8) is formed on a convex side surface and the recessed area (9) is formed on a concave side surface of the insert (5.1, 5.2). [5] Handlebar stem (1) according to any of the preceding claims, characterized by , that the highlighting (8) and the recessing (9) are aligned and formed in a corresponding manner, in particular as a tongue-and-groove joint. [6] Handlebar stem (1) according to one of the preceding claims, characterized by, that a raised section (8) is arranged on the concave side of the insert (5.1, 5.2) and preferably on the concave side of the further insert (5.2), and that a recess (9) is arranged on the convex side of the insert (5.1), on the front edge of the opening (4), on the rear edge of the opening (4), and preferably on the concave side of the further insert (5.2), which are provided to receive the raised section (8). [7] Handlebar stem (1) according to one of the preceding claims, characterized by, that the opening (4) is elongated, wherein the insert (5.1) has a concave and a convex side and in the first rotation position (A) the concave side points in the direction of travel (F) of the vehicle (100) and in the second rotation position (B) the concave side points against the direction of travel (F) of the vehicle (100), wherein in the first rotation position (A) of the insert (5.1) the receptacle (6) for receiving the handlebar (2) in the first position (I) is formed between the insert (5.1) and a front edge of the opening (4) and in the second rotation position of the insert (5.1) the receptacle (6) is formed between the insert (5.1) and a rear edge of the opening (4) in the second position (II). [8] Handlebar stem (1) according to any of the preceding claims, characterized bythat two insert parts (5.1, 5.2) are provided, which are arranged in the opening (4), wherein the further insert part (5.2) has a concave and a convex side and can be arranged in a first rotational position (A), in which the concave side points in the direction of travel (F) of the vehicle (100), and in a second rotational position (B), in which the concave side points against the direction of travel (F) of the vehicle, wherein, for the arrangement of the receptacle (6) in the first position (I), the further insert part (5.2) is arranged in the first rotational position (A) and between the insert part (5.1) and the rear edge of the opening (4), and for the arrangement of the receptacle (6) in the second position (II), the further insert part (5.2) is arranged in the second rotational position (B) and between the receptacle (6) and the insert part (5.1), wherein the receptacle (6) in a third position (III) is located between the insert part (5.1) and the further insert (5.2) is arranged when the insert (5.1) in the second rotation position (B) and the further insert (5.2) in the first rotation position (A). [9] Handlebar stem (1) according to any of the preceding claims, characterized by , that the insert (5.1) and the further insert (5.2) are identical in their shape. [10] Handlebar stem (1) according to any one of the preceding claims, characterized by , that the length of the insert (5.1) and the length of the further insert (5.2) are different. [11] Handlebar stem (1) according to any of the preceding claims, characterized by, that the opening (4) is provided in the base body (7) of the handlebar stem (1), wherein the base body (7) has a mounting part (7.1) and a front cap (7.2), wherein the front edge of the opening (4) is formed by a concave side of the front cap (7.2) and the rear edge of the opening (4) is formed by a concave side of the mounting part (7.1), wherein the front cap (7.2) is provided to be screwed to the mounting part (7.1). [12] Handlebar stem (1) according to one of the preceding claims, characterized by that the insert (5.1) and preferably the further insert (5.2) are at least partially made of a metal, in particular of aluminium. [13] Handlebar stem (1) according to one of the preceding claims, characterized by, that a raised section (8) designed as a nose or ridge is arranged on the convex side of the insert part (5.1) and preferably on the convex side of the further insert part (5.2), and that a recess designed as a groove or indentation is arranged on the concave side of the insert part (5.1), on the front edge of the opening (4), on the rear edge of the opening (4) and preferably on the concave side of the further insert part (5.2), which are provided to receive the raised section (8). [14] Handlebar stem (1) according to one of the preceding claims, characterized by, that the raised area (8) and recessed area (9) are arranged centrally on the insert part (5.1, 5.2) and on the edges of the opening (4) on opposite side surfaces extending transversely to the direction of travel, wherein the nose (8) is formed as an elongated rib not extending from one side end to the other side end of the side surface, and the indentation (9) is formed as elongated grooves not extending from one side end to the other side end of the side surface. [15] Handlebar stem (1) according to one of the preceding claims, characterized by , that the length of the insert (5.1) corresponds to 0.7 to 1.3 times the radius, in particular 1.1 to 1.2 times the radius, of the receptacle (6). [16] Handlebar stem (1) according to one of the preceding claims, characterized by , that the handlebar stem (1) is an Ahead stem. [17] Vehicle (100), in particular bicycle, comprising a handlebar stem (1) according to one of the preceding claims.

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