JPS6140965Y2 - - Google Patents

Description

[Detailed description of the invention] This invention prevents water droplets and fine dust from entering the gap between the inner cable and the conduit of the control cable (hereinafter simply referred to as the cable) used for remote control of automobiles, motorcycles, and various other industrial equipment. This invention relates to improvements to bellows boots.

As a conventional bellows boot for control cables, there is one shown in FIG. 3, for example. A conventional boot of this kind will be explained with reference to FIGS. 3 and 4. A cable 1 consists of a flexible conduit 2 and an inner cable 3 slidably inserted into the conduit. At both ends (only one end is shown) of the cap member 4 is fixed to a fixing plate 5 for fixing the conduit with a nut 6 or the like. Cable end fittings 7 are fixed to both ends (only one end is shown) of the inner cable 3 for engaging with an operating device or a passive device (not shown), and the other end (end not shown) of the inner cable 3 is fixed to both ends (only one end is shown).
By pulling in direction B (or pushing in direction A), one end of the inner cable (the end shown) is remotely controlled in direction B' (or direction A').

In such a conventional bellows boot for cables, when water droplets or fine dust adhere to the portion of the inner cable protruding from the cap member 4 due to the above-described operation of the inner cable 3, these droplets and dust are removed from the inner cable. Due to the operation of the cap member 4, the cap member 4 may penetrate further into the conduit 2 and cause rust, which significantly increases the sliding resistance of the inner cable 3 against the conduit and significantly reduces the durability of the cable 1. It was designed to solve problems such as lowering the temperature. However, as the inner cable 3 is remotely controlled in the direction B, the bellows boot 8 whose one end side is also slid in the direction B' is curved in the length direction, which not only deteriorates the appearance but also partially 8
friction with the inner cable being operated, causing the inner cables A and B to
There is a drawback that this portion 8 is torn due to repeated operations in different directions, and the waterproof and dustproof effects of the boots are lost.

This invention was made in order to overcome the conventional problems as mentioned above, and one embodiment of the invention will be explained with reference to Figs. 1 and 2 (see Fig. 3).
The same parts as those in FIGS. ) In this embodiment, the boot 9 has a cylindrical protrusion 9a projecting an appropriate length from the distal end side 9' of the boot's inner cavity toward the proximal side 9''. It is set up protrudingly.

To describe the function and effect of the bellows boot of the present invention, in such a configuration as shown in FIG.
When the boot 9 is slid in the direction shown in FIG. The bellows boots come into contact with the outer peripheral surface of the provided cylindrical protrusion 9a, and the cylindrical protrusion 9a is moved and compressed in the direction B', so that the bellows boot does not have an unsightly curvature in appearance, and a part 9 of the inner surface of the boot is Since the inner cable 3 is not directly touched by the interposition of the cylindrical protrusion 9a projecting inward, it is possible to prevent damage to the boot due to friction between the inner cable 3 and a portion 9 of the inner surface of the boot. Therefore, it has an excellent structure that can withstand use for a much longer period of time than conventional ones.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view showing the bellows boot according to the present invention attached to a cable, Fig. 2 is a partially cutaway side view showing the action (compression state) of the boot in Fig. 1, and Fig. FIG. 4 is a partially cutaway side view showing the installation state of the conventional boot, and FIG. 4 is a partially cutaway side view showing the operating condition (compressed state) of the boot in FIG. 3. 1... control cable, 2... conduit, 3
... Inner cable, 9 ... Bellows boot, 9a ... Cylindrical projection.

Claims (1)

[Scope of utility model registration request] A cylindrical elastic bellows boot comprising a cap member having a base fixed to a control cable conduit, and a distal end crimped or tightly attached to a portion of an inner cable inserted into the conduit that protrudes from the conduit. A bellows boot for a control cable, characterized in that a cylindrical protrusion of an appropriate length is provided in the inner cavity of the bellows boot in the axial direction from the distal end side toward the base side.