Angle-adjustable stem for mounting a handlebar on a two-wheeler

Abstract

Angle-adjustable stem for receiving a handlebar on a two-wheeler, in particular a bicycle, comprising a support section to be connected to a fork shaft of the two-wheeler and a holding section for the handlebar which is hinged to the support section, characterized in that the stem has shell-shaped housing sections (4, 5) which are assigned to its sections (1, 2) in a form-fitting manner.

Description

[0001] The invention relates to an angle-adjustable stem for receiving a handlebar on a two-wheeler, in particular a bicycle, comprising a support section to be connected to a fork shaft of the two-wheeler and a holding section for the handlebar which is hinged to the support section.

[0002] Such stems are used on two-wheelers, especially bicycles, to increase the distance between the saddle and the handlebars. This can result in a more stretched seating position for the two-wheeler rider, especially a cyclist.

[0003] In addition to fixed-angle stems, especially for bicycles, angle-adjustable stems have also been introduced. The adjustability of a stem allows the section of the stem supporting the handlebar to be positioned at a greater or lesser angle. Different angle settings result in different handlebar heights, which can be used for specific sections of riding in the city, uphill, or downhill, for example.

[0004] The angle-adjustable stem is connected to the fork tube of the two-wheeler, especially a bicycle, by its supporting section. This supporting section is fixed in angle and forms an extension of the fork tube. The holding section is then usually connected to the supporting section via a joint, the joint axis of which is preferably aligned approximately transversely to the direction of travel of the two-wheeler.

[0005] Since brake levers and shift levers are often located on the handlebars, especially on bicycles, cables and wires leading from these components must be routed over the stem. This is usually done using cable ties.

[0006] The invention is based on the object of providing an angle-adjustable stem of the type mentioned at the beginning, which enables the concealed laying of cables and lines.

[0007] This object is achieved according to the invention in that the stem has shell-shaped housing sections which are each assigned to its sections in a form-fitting manner.

[0008] Attachable housing sections are provided for the angle-adjustable stem. Separate housing sections are provided for each section of the stem, i.e., the support section and the holding section. These housing sections are attached to the respective sections with a form-fitting fit. Cables and wires can be concealed with the shell-shaped housing sections, leaving them largely invisible.

[0009] According to a first development of the invention, a first housing section is assigned to the support section of the stem, wherein this housing section is approximately U-shaped and has rear gripping sections for engaging behind the support section. The housing section assigned to the support section is U-shaped and thus equipped with a U-base and U-legs. The U-legs can encompass the support section, and the rear gripping sections then engage behind components of the support section. The U-shaped housing section enables the support section of the stem to be completely enclosed, and cables and lines routed along the support section are covered.

[0010] A further development of the invention provides that inwardly projecting sections are arranged on the inside of the first housing section. The housing section has inwardly projecting sections; these sections can engage components of the support section of the stem. These components can, for example, comprise a clamp; such a projecting section of the first housing section can project into the space between adjacent clamp ends. This can result in a spatially correct alignment of the housing section to the support section.

[0011] According to a further development of the invention, a second housing section is provided for the holding section of the stem. This second housing section can also be U-shaped and have contact sections for the angle adjustment axis of the stem. The second housing section is also U-shaped, so that it can encompass the holding section of the stem. The connection to the holding section of the stem is then achieved via provided contact sections. These contact sections rest against the angle adjustment axis of the stem.

[0012] In this case, it can be provided that the contact sections are designed congruently with the configuration of the angle adjustment axis. Thus, the contact sections can be designed congruently with the configuration of the angle adjustment axis. In this respect, a positive fit of the second housing section against the holding section of the stem is achieved. This positive fit is preferably achieved via projections of the contact sections, which can be inserted into recesses in the area of ​​the angle adjustment axis.

[0013] Finally, it can also be provided that an opening for a fastening device is provided in the second housing section. This fastening device can be a screw, for example, that can be screwed into a corresponding hole in the holding section. This further secures the second housing section. On the inside of the housing section, a web element can be assigned to the opening for the fastening device. This ensures that the second housing section is arranged at a distance from the holding section of the stem once the fastening device has been inserted. Cables and lines can then be laid at this distance.

[0014] To further develop the invention, it is also provided that the housing sections are each made of plastic.

[0015] An embodiment of the invention is illustrated in the drawing. It shows: Fig. 1: an angle-adjustable stem according to the invention in a side view; Fig. 2: a perspective partial view of the stem according to Fig. 1; Fig. 3: a perspective partial view of a component of the stem according to Fig. 1 and Fig. 4: another perspective partial view of the stem according to Fig. 1.

[0016] The porch in Fig. 1 comprises a support section 1 and a holding section 2. The support section 1 and the holding section 2 are connected to each other via a joint in an angle-adjustable manner. The holding section 2 has a handlebar mount 3, and the lower end of the support section 1 can be connected to the fork shaft of a front wheel fork.

[0017] The porch in Fig. 1 has a closed design. Two housing sections 4, 5 contribute to this. The first housing section 4 is attached to the stem in the area of ​​its supporting section 1. The second housing section 5 is attached to the stem in the area of ​​its holding section 2.

[0018] Fig. 2 shows that lines or cables 6 are laid through the first housing section 4 and through the second housing section 5, concealed from view from the outside.

[0019] Fig. 2 further shows that the first housing section 4 is U-shaped. It engages behind the support section 1. A section 7 protrudes from the inside of the first housing section 4. This section is guided into the space between a clamp 8 in the area of ​​the first support section 1, thereby centering the first housing section 4 on the support section 1. The U-shaped design of the first housing section 1 allows the first housing section 4 to be arranged on the stem without additional fastening means.

[0020] The second housing section 5 is also U-shaped. Its U-shaped legs extend to the pivot axis of the holding section 2, where they rest against the axis of the second holding section 2. Additionally, the second housing section 5 is attached to the holding section 2 via a screw 8, which is screwed into the holding section 2 via a web 9. The web 9 creates a gap between the screw receptacle and the holding section 2, and the cables 6 are routed in the space created by this gap.

[0021] Fig. 3 shows the pivot axis 10 of the holding section 2. A mechanism 11 for receiving the second housing section 5 is formed at the free end of this axis 10. This mechanism 11 includes recesses 12, into which projections 13 on the inside of the second housing section 5 can protrude.

[0022] Fig.Figure 4 shows these projections 13. The second housing section 5 can be pivoted within the axis 10 using the mechanism 11, even if the holding section 2 remains unchanged in its angular position. This allows the second housing section 5 to be opened easily.

Claims

[1] Angle-adjustable stem for receiving a handlebar on a two-wheeler, in particular a bicycle, comprising a support section to be connected to a fork shaft of the two-wheeler and a holding section for the handlebar hinged to the support section, characterized by that the stem has shell-shaped housing sections (4, 5) which are assigned to its sections (1, 2) in a form-fitting manner. [2] Stem according to claim 1, characterized by that a first housing section (4) is assigned to the support section (1) of the stem, wherein this housing section (4) is approximately U-shaped and has rear gripping sections for gripping behind the support section (1). [3] Stem according to claim 2, characterized by that inwardly projecting sections (7) are arranged on the inside of the first housing section (4). [4] Stem according to one of the preceding claims, characterized bythat a second housing section (5) is assigned to the holding section (2) of the stem, wherein this holding section (2) is U-shaped and has contact sections for the angle adjustment axis (10) of the stem. [5] Stem according to claim 4, characterized by that the contact sections for the design of the angle adjustment axis (10) are congruent. [6] Stem according to claim 5, characterized by that the contact sections have projections (13) which can be inserted into recesses (12) of the angle adjustment axis (10). [7] Stem according to one of claims 4 to 6, characterized by that an opening for a fastening means for fastening the second housing section (5) to the holding section (2) is arranged in the second housing section (5). [8] Stem according to claim 7, characterized by that a web element (9) is assigned to the opening on the inside of the second housing section (5). [9] Stem according to one of the preceding claims, characterized by that the housing sections (4, 5) are each made of plastic.

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