Shift cable of a bicycle cable system and bicycle cable system with a shift cable

Abstract

shift cable (30) for a bicycle cable pull (10), comprising at least part of which is enclosed in a cable housing (20): Strands (32, 32a, 32b, 32c) and a coating (34) applied to the strands (32, 32a, 32b, 32c), formed by electrically applying a material to the strands (32, 32a, 32b, 32c), wherein the Martens hardness of the coating (34), based on that of an inner circumferential surface (22) of the cable sheath (20), is greater than 2% and less than 2000%, and wherein the coating (34) is transparent or translucent with color.

Description

[0001] The present invention relates to shift cables of a bicycle cable system and to a bicycle cable system comprising a shift cable.

[0002] On bicycles, for example, cables are used to operate the gear shifters and brakes. Generally, a cable system comprises a housing and a shift cable, which is at least partially enclosed within the housing. To improve operational efficiency, the sliding resistance between the shift cable and the housing must be reduced.

[0003] Some conventional techniques for reducing the sliding resistance between the shift cable and the housing increase the production costs of the shift cable and / or the cable assembly to such an extent that they become expensive. This leads to increased bicycle maintenance costs. According to other conventional techniques, the initial effect of reducing the shift cable's sliding resistance diminishes relatively quickly. To maintain the desired operational readiness, the shift cable must be replaced frequently, thus increasing bicycle maintenance costs.

[0004] Shift cables are known from the publications DE 20 2013 100 843 U1, DE 69 05 185 U, DE 20 2013 008 535 U1, US 2006 / 0 053 945 A1 and DE 42 94 444 C2.

[0005] The publications "Hardness in Wikipedia, The Free Encyclopedia, last edited on 12.09.2014", "KOHLRAUSCH, Friedrich: Practical Physics for Use in Teaching, Research and Technology, Vol. 1, 24th ed. BG Teubener Stuttgart 1996", "GRELLMANN, Wolfgang; SCHÖNE, Jan: Temperature-Dependent Short- and Long-Term Investigations of Polymer Materials Using Recording Hardness Testing. In: Temperature-Dependent Recording Hardness Testing of Polymer Materials, Merseburg, May 2013" and "SCHÖNE, J., LACH, R., BIERÖGEL, C., GRELLMANN, W..: Temperature-Dependent Evaluation of the Mechanical Properties of Engineering Plastics Using Instrumented Penetrant Testing. In: Grellmann, WZ; Frenz, H.: Advances in Materials Testing for Research and Practice. 32nd Lecture and Discussion Conference on Materials Testing (2014)" deal with various coating techniques.

[0006] One object of the present invention is to provide shift cables for a bicycle cable pull with low cost and good operating efficiency.

[0007] The inventor of the present invention focuses on the relationship between the Martens hardness of the outer surface of the shift cable and the inner surface of the cable housing, which is not normally taken into account in the technical field of a bicycle cable system, and thus proposes a new technique for solving the above problem and for completing the present invention.

[0008] The first aspect of the present invention relates to a shift cable for a bicycle cable system, which is at least partially enclosed in a cable housing. The shift cable comprises strands and a coating applied to the strands. The coating is formed by electrically depositing a material onto the strands. The Martens hardness of the coating, relative to that of an inner circumferential surface of the cable housing, is greater than 2% and less than 2000%.

[0009] By electrically applying a material to the strands, the coating with the required Martens hardness, based on that of the inner circumferential surface of the cable housing, can be applied uniformly and easily. This allows the shift cable to be produced with good operational efficiency at low cost.

[0010] The coating is preferably provided by electrodeposition coating.

[0011] The Martens hardness of the coating is preferably greater than 1 N / mm². 2 and less than 1000 N / mm 2 and especially preferably greater than 43 N / mm 2 and less than 133 N / mm 2 .

[0012] The coating preferably covers the strands in such a way that the strands are exposed at less than 5 cm at one end and the other end.

[0013] According to another aspect of the present invention, a shift cable for a bicycle cable pulley system is at least partially enclosed in a cable housing. The shift cable comprises strands and a coating covering the strands. The strands are exposed for less than 5 cm at one end and less than 5 cm at the other end. The Martens hardness of the coating, relative to that of the inner circumferential surface of the cable housing, is greater than 96% and less than 250%.

[0014] By applying the coating with the above Martens hardness within the above range to the strands, the shift cable can be provided with reduced sliding resistance compared to the cable housing and good operational efficiency.

[0015] The Martens hardness of the coating is preferably greater than 43 N / mm². 2 and less than 133 N / mm 2 .

[0016] The coating is preferably provided by electrodeposition coating.

[0017] According to another aspect of the present invention, a shift cable for a bicycle cable pull is provided, which is at least partially enclosed in a cable housing and comprises strands and a coating applied to the strands. The coating is formed by electrically depositing a material onto the strands. The Martens hardness of the coating is greater than 1 N / mm². 2 and less than 1000 N / mm 2 .

[0018] By electrically applying the material to the strands, the coating with the required Martens hardness, based on the inner circumferential surface of the cable housing, can be applied uniformly and easily. This allows the shift cable to be produced with good operational efficiency at low cost.

[0019] The coating is preferably provided by electrodeposition coating.

[0020] The Martens hardness of the coating is preferably greater than 43 N / mm². 2 and less than 133 N / mm 2 .

[0021] The coating preferably covers the strands in such a way that the strands are exposed for less than 5 cm at one end and at the other end.

[0022] If required, the thickness of the coating can be more than 1 µm and less than 50 µm, for example more than 3 µm and less than 40 µm.

[0023] According to another aspect of the present invention, a shift cable for a bicycle cable pull is provided, which is at least partially enclosed in a cable housing and comprises strands and a coating applied to the strands. The coating is formed by electrically depositing a material onto the strands. The thickness of the coating is more than 1 µm and less than 50 µm.

[0024] By electrically applying a material to the strands, the coating can be applied uniformly and easily with the required thickness and Martens hardness. This allows the shift cable to be produced with good operational efficiency at low cost.

[0025] The coating is preferably provided by electrodeposition coating.

[0026] The coating thickness is preferably more than 3 µm and less than 40 µm.

[0027] The coating preferably covers the strands in such a way that the strands are exposed for less than 5 cm at one end and at the other end.

[0028] The coating preferably comprises urethane resin, epoxy resin, or an acrylic resin. The coating is transparent or translucent with color.

[0029] According to another aspect of the present invention, a bicycle cable system comprises the shift cable according to the invention and described above, and a cable housing that at least partially accommodates the shift cable. The Martens hardness of the inner circumferential surface of the cable housing is greater than 40 N / mm². 2 and less than 60 N / mm 2 .

[0030] This allows the advantages described in connection with the inventive shift cable to be achieved.

[0031] The result particularly clarifies that the technical features of the present inventions, in addition to specifying the compositions and structures of the coating, also determine the martens hardness of the coating.

[0032] The other aspects and advantages of the present invention will be explained with reference to the embodiments of the technical ideas shown in the drawings and the following descriptions.

[0033] The novel features of the present invention, particularly within the scope of the appended claims, become apparent. With reference to the accompanying drawings, the subject matter and advantages of the present invention become clear with reference to the embodiments described below. As such, it shows Fig. 1 a perspective view of the bicycle cable pull according to the first embodiment of the present invention; Fig.2 a schematic cross-sectional view and a partially enlarged view of the switching cable of Fig. 1; Fig. 3 a schematic cross-sectional view of the bicycle cable pull of Fig. 1; Fig. 4. A perspective view of one end of the shift cable; and Fig. 5 A diagram of Martens hardness to illustrate the embodiments and comparative examples.

[0034] As in Fig.As shown in Figure 1, the bicycle cable 10 of the first embodiment of the present invention comprises a cable housing 20 and a shift cable 30, which is at least partially enclosed in the cable housing 20. The bicycle cable 10 is used for the operational connection of a gear shifting or braking device to the actuating device. The cable housing 20 has an inner circumferential surface 22, which consists mainly of synthetic resin. The cable housing 20 may also have a cylindrical reinforcement element 24 braided from steel wires inside it. When the actuating device is triggered, the shift cable 30 can slide against the inner circumferential surface 22 of the cable housing 20.

[0035] The structure of the shift cable 30 is described with reference to Fig.2 explained. The switching cable 30 comprises a strand bundle 32 and a coating 34 formed on the outermost strand bundle 32. The coating 34 is used to protect the outside of the strand bundle 32, to improve corrosion and weather resistance, and to reduce the sliding resistance between the switching cable 30 and the cable housing 20.

[0036] The stranded wire bundle 32 contains at least one strand comprising a conductive material, such as metal and the like. The strand is usually an iron wire or a steel wire. As in Fig.As shown in Figure 2, the strand bundle 32 is formed by stranding several strands together according to the Warrington method, i.e., as Warrington seals. In this embodiment, the strand bundle 32 consists of a first strand 32a in the center, six second strands 32b arranged around the outer circumference of the first strand 32a, and twelve third strands 32c arranged around the outer circumference of the second strands 32b. In this embodiment, the strands 32a, 32b, and 32c have the same size, the same diameter, and are made of the same material. The strands 32a, 32b, and 32c may be coated. The strands 32a, 32b, and 32c may also be formed by stranding together several thread-like elements (multiple iron wires, steel wires, or a combination thereof).

[0037] As in Fig.As shown in Figure 2, the coating 34 is applied to the third strands 32c, forming the outer layer of the switching cable 30. Due to the coating 34, the wear of the strands 32a, 32b, and 32c is reduced or prevented. It is conceivable, however, that the coating 34 is not applied to the first strand 32a and the second strand 32b.

[0038] The shift cable 30 moves from its rest position to the actuated position when the actuating device of a bicycle shifting system is activated. When the actuating device is released, the shift cable 30 returns from the actuated position to its rest position by means of the restoring force of the actuating device. The movement of the shift cable 30 from the actuated position to the rest position, and the movement of the shift cable 30 from the rest position to the actuated position, are typically influenced by sliding resistance. By reducing the sliding resistance, the coating 34 can improve both the movement of the shift cable 30 from the actuated position to the rest position and the movement of the shift cable 30 from the rest position to the actuated position.

[0039] The coating 34 is preferably applied to the strand bundle 32 by electrically depositing the material (the coating material), consisting of solid particles and a liquid substance, onto the strand bundle 32 (in this example, the third strands 32c). More precisely, the coating 34 is preferably applied to the strand bundle 32 (in this example, to the third strands 32c) by one of the following processes: electrodeposition coating, electrostatic coating, and powder coating. In this embodiment, the coating 34 is applied to the strand bundle 32 by electrodeposition coating, provided that the aqueous coating material and the object to be coated have different electrostatic polarities, with the object to be coated being placed in the aqueous coating material. A simple explanation of electrodeposition coating now follows.First, the stranded wire bundle 32 is manufactured. If required, the stranded wire bundle 32 can be coated. Then, the stranded wire bundle 32 is degreased. Next, the surface of the metal material of the stranded wire bundle 32 is activated using a surface treatment agent. The activated stranded wire bundle 32 is immersed in the electrolyte bath to perform electrodeposition coating. The electrolyte bath contains, for example, the coating compositions, consisting of cationic urethane resin, cationic epoxy resin, or anionic acrylic resin, and the like. By means of electrodeposition coating, the coating compositions are deposited in the electrolyte bath on the outside of the stranded wire bundle 32 such that the coating 34 covers the outside of the stranded wire bundle 32.Depending on the composition of the electrolyte bath and, if necessary, by heating (heat treatment) the strand bundle 32, chemical reactions such as dehydration condensation and the like will be triggered for the coating compositions that harden the coating 34. As in . Fig. As shown in section 4, the coating preferably covers the strands such that an exposed length L ex The length of the strands is less than 5 cm at one end and less than 5 cm at the other end. A drum-shaped component 30a, which is contained in the switching cable 30, is not covered by the coating 34.

[0040] In this embodiment, the coating 34 is designed as a transparent color by electrodeposition coating. In particular, transparent blue or green can be designed.

[0041] Electrodeposition coating has the advantage that a coating 34 is formed that is closely attached to the strand bundle 32. Furthermore, electrodeposition coating has the advantage that the coating thickness can be precisely controlled. As in Fig. As shown in 2, the coating 34 is designed such that the thickness T f The coating 34 lies in a range greater than 1 µm and less than 50 µm, and particularly preferably greater than 3 µm and less than 4 µm. By adjusting the thickness T f The coating 34 in this area can have a thickness T f the coating 34 formed on the outer surface of the shift cable 30 can be easily standardized. In Fig. 2 is the thickness T f The coating 34 is drawn in an exaggerated way, rather than representing the actual thickness.

[0042] Moreover, compared to a coating formed by spraying on a coating material, electrodeposition coating can reduce the unnecessary waste of coating material (material for electrodeposition coating) for the formation of the coating 34, thus reducing manufacturing costs.

[0043] Next, Martens hardness will be explained. Martens hardness represents the test load required to create a 0.01 mm scratch on the surface of a test material, for example, by contacting a pyramid-shaped (conical) protrusion at a 90° angle with the surface of the sample material. Martens hardness is measured according to ISO 14577-1 (Instrumented indentation test for the determination of hardness). The apparatus used to measure Martens hardness can be, for example, the DUH-211S model manufactured by Shimadzu Corporation.

[0044] The martens hardness of the coating 34 can be determined with respect to the martens hardness of the inner circumferential surface 22 of the tensile sleeve 20. For example, the ratio of the martens hardness of the inner circumferential surface 22 of the tensile sleeve 20 is greater than 2% and less than 2000%. The martens hardness of the coating 34 can be adjusted by controlling the electrodeposition coating process. For example, by controlling the coating thickness, the type of coating composition (e.g., monomer), the applied current and time, and the heat treatment (degree of curing), the coating 34 can be produced with the desired martens hardness within the range specified above.

[0045] The Martens hardness of the coating 34 is preferably greater than 1 N / mm². 2 and less than 1000 N / mm 2 and especially preferably greater than 43 N / mm 2 and less than 133 N / mm 2For the coating 34 with a Martens hardness within the above range, the inner circumferential surface 22 has a Martens hardness greater than 40 N / mm². 2 and the cable housing 20 with a Martens hardness of less than 60 N / mm² 2 This represents the best combination. This combination is particularly suitable for reducing sliding resistance.

[0046] Next, the Martens hardness of the switching cable 30 of the embodiment according to the invention, the Martens hardness of the comparative examples, and their sliding resistance are explained with reference to the following Table 1. Furthermore, the sliding indices in Table 1 are obtained by applying a predetermined load to the switching cable to retract it into the pull sheath arranged in a predetermined path, and then calculating the ratio of the wire tension during pulling to the wire tension during retraction. It has been found to be advantageous that the higher the sliding index, the lower the loss caused by the sliding resistance. Table 1 Martens hardness (N / mm) 2 ) Sliding index (%) Cost Method for forming the coating embodiment 90 70 O Electrodeposition coating Comparative example 1 230 37 X non-electrode coating Comparative example 2 135 45 X non-electrode coating Comparative example 3 160 60 X non-electrode coating Comparative example 4 160 63 X non-electrode coating Comparative example 5 39 64 X non-electrode coating Comparative example 6 40 66 X non-electrode coating Comparative example 7 42 71 X non-electrodemic coating chten

[0047] Regarding the results for the Martens hardness, which has never before been investigated in the field of conventional bicycle cables, the new insights into the relationship between Martens hardness and sliding resistance can be directly derived. That is, it is generally assumed that the higher the Martens hardness of the coating, the lower the sliding resistance. On the other hand, as in Fig. Figure 5 shows, quite surprisingly, that the higher the Martens hardness of the coating, the greater the sliding resistance. It follows that in bicycle applications with curved cable housings, the higher the Martens hardness of the coating, the more the flexibility of the shift cable is impaired, so that the sliding resistance between the shift cable and the housing can increase locally at the curved section.

[0048] The embodiment shows a preferred result with regard to the sliding index and costs. On the other hand, comparative examples 1 to 4 show poor results with regard to the sliding index and costs; comparative examples 5 to 7 show advantageous results with regard to the sliding index, but poor results with regard to costs.

[0049] The Martens hardness of the inner circumferential surface of the cable housing is greater than 40 N / mm². 2 and less than 60 N / mm 2 Although not shown in Table 1, a coating formed by electrodeposition exhibits a Martens hardness greater than 43 N / mm². 2 and less than 133 N / mm 2 the same extent of the results as the embodiment. Therefore, with respect to the Martens hardness of the inner circumferential surface 22 of the cable housing 20, the Martens hardness of the coating 34 is preferably greater than 96% and less than 250%.

[0050] The advantages thus obtained are described using the following embodiments. (1) A shift cable 30 for a bicycle cable pull 10 comprises a strand bundle 32 and a coating 34 applied to the strand bundle 32 by electrical (electrostatic) deposition of a material onto the strand bundle 32. The Martens hardness of the coating 34, relative to that of the inner circumferential surface 22 of the cable housing 20, is greater than 2% and less than 2000%. More precisely, the coating 34 is formed by electrodeposition, which allows the coating 34 to be formed at a lower cost than non-electrodeposition coating, such as spray coating and the like. Therefore, the cost per unit thickness of the coating 34 formed by electrodeposition is relatively low. Moreover, the coating 34 formed by electrodeposition adheres more closely to the strands 32 than that formed by non-electrodeposition coating. Therefore, the durability of the coating 34 is higher.The reduction in sliding resistance achieved by the coating 34 lasts longer. Furthermore, provided the target manufacturing costs of the shift cable 30 remain the same, a thicker coating 34 can be formed by applying electrodeposition coating. As a result, the durability of the coating 34 increases, the wear of the strands 32 decreases, and the service life of the shift cable 30 is extended. The extended service life of the shift cable 30 contributes to a reduction in bicycle maintenance costs. By combining electrodeposition coating with adjusting the Martens hardness range, the shift cable 30 can be provided with low manufacturing and / or maintenance costs, and the sliding resistance between the shift cable 30 and the cable housing 20 precisely meets the needs of bicycle users. (2) The Martens hardness of the coating 34 is greater than 1 N / mm² 2 and less than 1000 N / mm 2 The coating 34 with this range of Martens hardness can equally meet the requirements for cost and sliding resistance if the Martens hardness of the inner circumferential surface 22 of the tensile sleeve 20 is 40 - 60 N / mm². 2 amounts. (3) The Martens hardness of the coating 34 is greater than 43 N / mm². 2 and less than 133 N / mm 2 The coating 34 within this range of Martens hardness can meet the requirements for sliding resistance, durability and cost at a higher level. (4) The coating 34 covers the strands 32, with less than 5 cm of the strands exposed at one end and the other. According to this configuration, the majority of the outer surface of the shift cable 30, which contacts the inner circumferential surface 22 of the cable housing 20, can be protected by the coating 34, thus reducing the sliding resistance and improving the durability of the shift cable 30. Alternatively, by not forming a coating 34 on one end and the other of the strands 32, which contact the inner circumferential surface 22 of the cable housing 20 less frequently, the sliding resistance is hardly or not at all impaired, thus reducing the cost of the shift cable 30. (5) The thickness T can be adjusted as needed f The coating thickness T can be set to 34 greater than 1 µm and less than 50 µm or greater than 3 µm and less than 40 µm. fWithin this area, the thickness of the coating 34 formed on the outermost section of the shift cable 30 can be easily standardized. The relatively thicker coating 34 contributes to an improvement in the durability of the coating 34 and a reduction in the wear of the strands 32. (6) The coating 34 may contain urethane resin, epoxy resin, or acrylic resin. Preferably, the coating 34 is made of cationic urethane resin, cationic epoxy resin, or anionic acrylic resin. With respect to these compositions, the coating 34 may be formed by electrodeposition coating. (7) The coating 34 is transparent or translucent with color. The colored coating 34 can be formed by mixing the colored composition of dyes and pigments in the material (e.g., the composition of the material for electrochemical deposition) to form the coating 34. The coating 34 can also be colored after it has been applied to the strands 32. The transparent or translucent colored coating 34 is advantageous because the electrodeposition coating of the coating 34 and any defects or delamination points of the coating 34 can be easily confirmed by visual inspection. Preferably, the material corresponding to the strands 32 and / or the stranding method have different colors so that the types of switching cables can be easily identified. (8) Preferably the bicycle cable 10 for the embodiment with the shift cable 30 and the cable housing 20, the inner circumferential surface 22 of which has a Martens hardness of more than 40 N / mm². 2 and less than 60 N / mm 2 has been provided. According to this configuration, benefits (1) to (7) can be obtained.

[0051] The present invention is not limited to the embodiments described above (or one or more aspects thereof). For example, the embodiments can also be modified as follows.

[0052] If the coating 34 is an electrodeposition coating, it is more durable and cost-effective. However, in addition to durability and cost, some road cyclists require a reduction in sliding resistance within a short time. For this purpose, the coating 34 can be formed using methods other than electrodeposition coating. In this case, the sliding resistance can be reduced by ensuring that the Martens hardness of the coating 34, relative to that of the inner circumferential surface 22 of the cable housing 20, is greater than 96% and less than 250%, and that the coating 34 covers the strands 32 such that less than 5 cm of the strands 32 are exposed at each end. Based on the same reasons as in the embodiments, in the case of a Martens hardness of the inner circumferential surface 22 of the cable housing 20 greater than 40 N / mm², the coating 34 can be further reduced. 2 and less than 60 N / mm 2 The Martens hardness of the coating 34 is preferably greater than 43 N / mm². 2and less than 133 N / mm 2 .

[0053] Solid lubricants can be applied to the coating 34. These solid lubricants reduce the sliding resistance between the shift cable 30 and the cable housing 20. When forming the coating 34 by electrodeposition, the solid lubricants can be applied to the coating 34 before heating the strands 32, either in the uncured or fully cured state.

[0054] In the foregoing embodiments, the first strand 32a, the second strands 32b, and the third strands 32c have the same diameter, but they can also have different diameters. For example, the central first strand 32a can have a larger diameter than the second strands 32b and the third strands 32c. And the number of strands 32, which is not limited to the foregoing embodiments, can be at least one strand.

[0055] The bicycle cable pull of the present invention can be used in any gear shifting device, brake device, suspension system and the like of any bicycle actuation device.

[0056] The person skilled in the art will understand from this disclosure that various changes and modifications can be made without deviating from the handling of the invention as defined in the appended claims. For example, components and / or parts of some parts can be omitted, or components and / or parts can be combined in the embodiments.

Claims

[1] Shift cable (30) for a bicycle cable pull (10), comprising at least part of which is enclosed in a cable housing (20): Strands (32, 32a, 32b, 32c) and a coating (34) applied to the strands (32, 32a, 32b, 32c), formed by electrically applying a material to the strands (32, 32a, 32b, 32c), wherein the Martens hardness of the coating (34), based on that of an inner circumferential surface (22) of the cable sheath (20), is greater than 2% and less than 2000%, and wherein the coating (34) is transparent or translucent with color. [2] Switching cable (30) according to claim 1, wherein the coating (34) is provided by electrodeposition coating. [3] Shift cable (30) according to claim 1 or 2, wherein the Martens hardness of the coating (34) is greater than 1 N / mm² 2 and less than 1000 N / mm 2 , preferably greater than 43 N / mm 2 and less than 133 N / mm 2 is. [4] Switching cable (30) according to one of the preceding claims, wherein the coating (34) covers the strands (32, 32a, 32b, 32c) such that the strands (32, 32a, 32b, 32c) are exposed for less than 5 cm at one end and at the other end. [5] Shift cable (30) for a bicycle cable pull (10), comprising at least part of which is enclosed in a cable housing (20): Strands (32, 32a, 32b, 32c) and a coating (34) covering the strands (32, 32a, 32b, 32c), wherein the strands (32, 32a, 32b, 32c) are exposed for less than 5 cm at one end and the other end, wherein the Martens hardness of the coating (34), relative to that of the inner circumferential surface (22) of the cable sheath (20), is greater than 96% and less than 250%, and wherein the coating (34) is transparent or translucent with color. [6] Shift cable (30) according to claim 5, wherein the Martens hardness of the coating (34) is greater than 43 N / mm² 2 and less than 133 N / mm 2 is. [7] Switching cable (30) according to claim 5 or 6, wherein the coating (34) is provided by electrodeposition coating. [8] Shift cable (30) for a bicycle cable pull (10), comprising at least part of which is enclosed in a cable housing (20): Strands (32, 32a, 32b, 32c) and a coating (34) applied to the strands (32, 32a, 32b, 32c), formed by electrically attaching a material to the strands (32, 32a, 32b, 32c), wherein the Martens hardness of the coating (34) is greater than 1 N / mm² 2 and less than 1000 N / mm 2 is, wherein the coating (34) is transparent or translucent with color. [9] Switching cable (30) according to claim 8, wherein the coating (34) is provided by electrodeposition coating. [10] Shift cable (30) according to claim 8 or 9, wherein the Martens hardness of the coating (34) is greater than 43 N / mm² 2 and less than 133 N / mm 2 is. [11] Switching cable (30) according to any one of the preceding claims 8 to 10, wherein the coating (34) covers the strands (32, 32a, 32b, 32c) such that the strands (32, 32a, 32b, 32c) are exposed for less than 5 cm at one end and at the other end. [12] Switching cable (30) according to one of the preceding claims, wherein the thickness of the coating (34) is more than 1 µm and less than 50 µm, preferably more than 3 µm and less than 40 µm. [13] Shift cable (30) for a bicycle cable pull (10), comprising: Strands (32, 32a, 32b, 32c) and a coating (34) applied to the strands (32, 32a, 32b, 32c), formed by electrically attaching a material to the strands (32, 32a, 32b, 32c), wherein the thickness of the coating (34) is more than 1 µm and less than 50 µm, and wherein the coating (34) is transparent or translucent with color. [14] Switching cable (30) according to claim 13, wherein the coating (34) is provided by electrodeposition coating. [15] Switching cable (30) according to claim 13 or 14, wherein the thickness of the coating (34) is more than 3 µm and less than 40 µm. [16] Switching cable (30) according to any one of the preceding claims 13 to 15, wherein the coating (34) covers the strands (32, 32a, 32b, 32c) such that the strands (32, 32a, 32b, 32c) are exposed for less than 5 cm at one end and at the other end. [17] Shift cable (30) according to one of the preceding claims, wherein the coating (34) comprises urethane resin, epoxy resin or acrylic resin. [18] Bicycle cable pull (10) comprising: a shift cable (30) according to one of the preceding claims and a cable housing (20) which at least partially accommodates the shift cable (30), wherein the Martens hardness of the inner circumferential surface (22) of the cable housing (20) is greater than 40 N / mm² 2 and less than 60 N / mm 2is.

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