Conducting wire sheath

Abstract

A conducting wire sheath comprises a plurality of connected pipes, and each connected pipe comprises: a metal outer pipe which is provided with a head section, an extending section, an abutting section, and a tail section, wherein the internal diameter of the extending section is the same as the internal diameter of the head section, and the internal diameter of the abutting section is larger than the internal diameter of the extending section; a plastic inner pipe which is provided with a fixing section and a protecting section extending from the fixing section, wherein the external diameter of the fixing section corresponds to the internal diameter of the abutting section, and the external diameter of the protecting section corresponds to the internal diameter of the extending section. The plastic inner pipe is inserted into the metal outer pipe from the tail section, and the fixing section is abutted against the abutting section; wherein the tail section of each connected pipe is used for the insertion of a head section of another connected pipe; wherein the axial length of the fixing section is less than the axial length of the abutting section, and buffer space is formed in the abutting section. The beneficial effects of the invention are that the cost is saved; high convenience is provided for production and application; and the conducting wire sheath has strong applicability.

Description

technical field [0001] The invention relates to a sheath, in particular to a wire sheath which saves cost, is highly convenient in production and use, and has strong applicability. Background technique [0002] The wire sheath is used to cover the bicycle brake line or other similar ropes, so as to protect the rope or the user. [0003] In the existing wire sheath, you can refer to the US Patent No. 6,250,175, which is to connect a plurality of tubes against each other in series, for the plastic tube and metal rope of the brake line to pass through it. However, this kind of brake line is used It is easy to be bent arbitrarily due to the influence of residual internal stress in the plastic tube, and it is difficult for the user to bend to an ideal position. In addition, the debris peeled off from the plastic tube due to the aging of the material also easily hinders the movement of the metal rope and the wire sheath. And reduce the use effect. [0004] Also, as described in ...

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Problems solved by technology

[0003] In the existing wire sheath, you can refer to the US Patent No. 6,250,175, which is to connect a plurality of tubes against each other in series, for the plastic tube and metal rope of the brake line to pass through it. However, this kind of brake line is used It is easy to be bent arbitrarily due to the influence of residual internal stress in the plastic tube, and it is difficult for the user to bend to an ideal position. In addition, the debris peeled off from the plastic tube due to the aging of the material also easily hinders the movement of the metal rope and the wire sheath. and reduce the effect of using

[0004] Also, as described in U.S. Patent No. 5,899,425, the rope can be directly threaded into the wire sheath. However, if the wire sheath is made of metal, the metal rope will directly rub against the wire sheath, and it is easy to jam each other during use. noise

[0005] In other similar structures, you can also refer to US Patent No. 6,502,496, which divides the wire sheath into an inner layer and an outer layer, which can be made of different methods and materials to avoid cutting or damage to the outer layer The wires that pass through the inner layer, however, need to be provided with an adhesive between the outer layer and the inner layer to avoid the separation of the outer layer and the inner layer, making production and assembly more difficult

[0006] In addition, there is the U.S. Patent No. 6,648,376, which has a bushing inside the wire sheath. However, the bushing in this patent only partially abuts against the wire sheath, and there is a problem that it is easier to separate from the wire sheath. At the same time, The bushing will snap against the adjacent wire sheath, limiting the angle at which the wire sheath can bend

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