Special internal hexagonal wrench for TT brake handle of bicycle

Abstract

The utility model discloses a special internal hexagonal wrench for a TT brake handle of a bicycle, which comprises an L-shaped wrench handle, the L-shaped wrench handle comprises a long side for holding and a short side for being inserted into a fastening bolt hole, the short side and the long side are perpendicular to each other, and the combined part is an arc-shaped connecting part. The short edge and the arc-shaped connecting part are integrally provided with a wire groove used for containing a brake pull wire. When the TT brake handle is installed, the TT brake handle does not need to be fixed firstly and then the brake stay wire is installed; during dismounting, the TT brake handle does not need to be dismounted after the brake pull wire is pulled out, the brake pull wire extending out of the fastening bolt hole can be embedded into the wire groove, and then the short edge of the internal hexagonal wrench extends into the fastening bolt hole along the brake pull wire. Due to the fact that the brake pull wire is contained in the wire groove, the phenomenon that the internal hexagonal wrench interferes with the brake pull wire is avoided, the efficiency of mounting and dismounting the TT brake handle is improved, labor intensity is reduced, and the TT brake handle has good application and popularization prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycles, in particular to an inner hexagon wrench for bicycles. Background Art

[0002] The TT brake lever of a bicycle, namely the "Time Trial" brake lever, is a brake lever specially designed for bicycle time trials. The design feature of the TT brake lever is to reduce wind resistance and improve riding efficiency.

[0003] Some TT brake levers adopt an expansion type installation structure, and the fastening screw hole and the brake cable are concentric. Since an inner hexagon wrench needs to be inserted into the fastening screw hole for operation during both installation and disassembly, interference will occur between the inner hexagon wrench and the brake cable. Therefore, the brake lever needs to be fixed first and then the brake cable is installed during installation, and the brake cable must be pulled out first before the brake lever can be disassembled during disassembly. Otherwise, the brake cable will be damaged due to the extrusion of the inner hexagon wrench, or it will be difficult for the inner hexagon wrench to extend into the fastening screw hole due to the obstruction of the brake cable.

[0004] During installation, the brake lever needs to be fixed first and then the brake cable is installed. During disassembly, the brake cable must be pulled out first before the brake lever can be disassembled. This installation and disassembly method is to avoid interference between the inner hexagon wrench and the brake cable. Although interference is avoided, the installation and disassembly are relatively inconvenient. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a special inner hexagon wrench for the TT brake lever of a bicycle, which can avoid interference between the inner hexagon wrench and the brake cable, and is very convenient for installation and disassembly.

[0006] To achieve the above purpose, the special inner hexagon wrench for the TT brake lever of the utility model includes an L-shaped wrench handle. The L-shaped wrench handle includes a long side for holding by hand and a short side for inserting into the fastening bolt hole. The short side and the long side are perpendicular to each other and the joint part is an arc-shaped connecting part. A wire groove for accommodating the brake cable is integrally formed on the short side and the arc-shaped connecting part.

[0007] The utility model has the following advantages:

[0008] The utility model has a simple structure and is convenient to use. When installing the TT brake lever, it is not necessary to first fix the TT brake lever and then install the brake cable; when disassembling, it is not necessary to first pull out the brake cable and then disassemble the TT brake lever. Instead, the brake cable extending out of the fastening bolt hole can be embedded in the wire groove, and then the short side of the hex key is inserted into the fastening bolt hole along the brake cable. Since the brake cable is accommodated by the wire groove, the hex key will not squeeze the brake cable, and the phenomenon that the hex key is difficult to enter the fastening bolt hole will not occur, nor will the phenomenon that the brake cable is damaged due to extrusion when the hex key is squeezed into the fastening bolt hole occur, improving the installation and disassembly efficiency of the TT brake lever, reducing the labor intensity, and making the utility model have good popularization and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic structural diagram of the utility model.

[0010] Figure 2 is Figure 1 the A-A cross-sectional view of

[0011] Figure 3 is a schematic perspective structural diagram of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] As Figures 1 to 3 shown, the special hex key for the bicycle TT brake lever of the utility model includes an L-shaped wrench handle. The L-shaped wrench handle includes a long side 1 for holding by hand and a short side 2 for inserting into the fastening bolt hole. The short side 2 and the long side 1 are perpendicular to each other and the joint part of the two is an arc-shaped connecting part 3.

[0013] A wire groove 4 for accommodating the brake cable is integrally formed on the short side 2 and the arc-shaped connecting part 3.

[0014] When installing the TT brake lever, it is not necessary to wait to install the brake cable after installing the brake lever, which is very important for bicycle sales because some purchasers cannot install the brake cable by themselves. With the utility model, the brake cable can be installed in advance, and the purchaser only needs to connect the brake lever. When disassembling the TT brake lever, it is not necessary to first pull out the brake cable, thus reducing the disassembly workload and improving the disassembly efficiency. When replacing the TT brake lever, since the brake cable is not pulled out, it is not necessary to install the brake cable again when reinstalling the TT brake lever, and the replacement is very convenient and fast. The utility model has a simple structure, is easy to manufacture, and can also be modified on the basis of the existing hex key, and has good popularization and application prospects.

[0015] Specifically, when installing or disassembling the TT brake lever, insert the brake cable extending out of the fastening bolt hole into the wire groove 4, and make the brake cable pass through the wire groove 4 along the length direction of the wire groove 4. Then, along the brake cable, insert the short side 2 of the hex key into the fastening bolt hole. At the fastening bolt hole, the brake cable is accommodated in the fastening bolt hole, so there is no structural interference between the brake cable and the hex key.

[0016] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be modified or equivalently replaced, and any modification or partial replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims

1. A special hexagon wrench for a bicycle TT brake handle, comprising an L-shaped wrench handle, the L-shaped wrench handle comprising a long side for holding and a short side for inserting into a fastening bolt hole, the short side and the long side are perpendicular to each other and the joint portion is an arc-shaped connecting portion, characterized in that: The short side and the arc-shaped connecting portion are integrally provided with a wire groove for accommodating the brake wire.

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