Wire rod holder

Abstract

To provide a wire rod holder capable of reducing the number of parts in a wire rod holding member.SOLUTION: A wire rod holder which holds a wire rod comprises: a holding base part fixed to a fixing surface extending in a direction of 1 and made of open-cell synthetic resin foam; and a slit provided in the holding base part, sandwiching a portion of the wire rod and holding it in the direction of 1. The slit is set at a slant to the fixing surface.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wire holder for holding wires such as wiring for electronic devices, and more particularly to a wire holder for cables such as optical fiber cables whose functionality is significantly affected by external forces such as vibrations and impacts. [Background technology]

[0002] Generally, optical fiber cables used for internet lines, etc. are made of glass material, and if scratches occur on the surface, the cable strength decreases, so a wiring fixing structure is required that prevents fatigue failure due to mechanical external forces.

[0003] Patent Document 1 also describes an emergency recovery closure that can protect a partially damaged closure even if it is left for a long period of time until full recovery. This emergency recovery closure is equipped with a wire retention structure that uses a sponge member as a wire retention tool to prevent damage to the optical fiber cable and ensures the wiring route. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-176122 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned device, when wiring an optical fiber cable using conventional sponge members, when the cable moves vertically due to external forces such as vibration, two pairs of sponge members are required: one to hold the cable down from above in order to prevent it from jumping out of the sponge member, and one pair of sponge members for the upper and lower covers to hold the cable down from below in order to prevent it from jumping out of the sponge member, meaning that four sponge members are required for one cable.This results in high material costs and the need for space to install four sponge members.

[0006] The present invention has been made in consideration of the above points, and an example of an object thereof is to provide a wire holder that can reduce the number of parts of a wire holding member. [Means for solving the problem]

[0007] The wire holder of the present invention is a wire holder for holding a wire. a holding base portion fixed to a fixing surface extending in a direction I and made of an open-cell synthetic resin foam; a slit provided in the holding base portion for clamping a part of the wire rod and holding the part along the first direction; The slit is provided obliquely with respect to the fixing surface. [Effects of the Invention]

[0008] According to the present invention, by using a holding base portion (sponge member) made of open-cell synthetic resin foam having the slits arranged at an angle to the fixing surface to fix the wire cable, the wiring fixing function is ensured and the load on the cable can be reduced with fewer parts than conventional methods. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic perspective view showing an example of a wire holder according to a first embodiment of the present invention. [Figure 2] 1 is a schematic perspective view showing an example of use of the wire holder of the first embodiment. FIG. [Figure 3] 10 is a schematic cross-sectional view of a sponge member cut by a plane perpendicular to the extension direction of the cable of the wire clamped by the slit, showing a wire holder of a modified example of the first embodiment. FIG. [Figure 4] 10 is a schematic cross-sectional view of a sponge member cut along a plane parallel to the extension direction of the cable of the wire clamped by the slit, showing the wire holder of the second embodiment. FIG. [Figure 5] 10 is a schematic diagram showing the wire holder of the third embodiment, illustrating the internal structure of a housing of a closure that houses a wire cable clamped and held by a plurality of sponge members, each having a slit. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a wire holder according to an embodiment of the present invention will be described with reference to the drawings. In the embodiments, components having substantially the same functions and configurations are designated by the same reference numerals, and redundant description will be omitted.

[0011] (First Example) (Configuration explanation) A first embodiment of the present invention is shown in Fig. 1. Fig. 1 is a schematic perspective view showing an example of a wire holder of this embodiment.

[0012] The wire holder of this embodiment is a sponge member 1 made of open-cell synthetic resin foam and fixed to a fixing surface FF extending in a certain direction, and is a holding base portion provided in the sponge member 1 having a diagonal slit KS that clamps a portion of the cable C and holds it along the in-plane direction of the fixing surface FF.

[0013] The open-cell synthetic resin structure that forms the holding base is a foam of polyurethane (PUR), polystyrene (PS), polyolefin (polyethylene (PE), polypropylene (PP), etc.), which is a soft material that will not cause fatigue failure even when the clamped cable C comes into contact with it.

[0014] For example, the sponge member 1 is a holding base portion in the shape of a rectangular parallelepiped. The diagonal slit KS of the holding base portion is provided by cutting obliquely into the inside from a side surface rising from one surface of the rectangular parallelepiped, for example, the bottom surface, with respect to the fixing surface FF.

[0015] Regarding the cable C held in the diagonal slit KS, the relationship of the force generated when the cable C moves due to an external force being applied to the cable C by vibration or impact will be explained.

[0016] For example, assuming that the inclination angle θ of the slit KS is 45° with respect to the fixing surface FF and an external force F in the vertically downward direction acts on the cable C, the reaction force can be decomposed into the vertical direction and the horizontal direction, as shown in the following formula: Reaction force in the vertical direction: F×(cos45°)^2 < F Reaction force in the horizontal direction: F×cos45°×sin45° < F (∵ For an angle θ taking values in the range of 0 to 90°, 0 < sinθ < 1, 0 < cosθ < 1). Therefore, since the external force F is greater than the reaction force, the cable C will stay within the slit KS of the sponge member 1.

[0017] On the other hand, when an external force is applied to the cable C in a direction to try to come out of the diagonal slit KS obliquely upward from the fixing surface FF, since it is the same that the external force is greater than the reaction force, the cable C moves in a direction to come out of the slit KS. Therefore, as shown in FIG. ②, the sponge members 1 and 2 each having a slit KS are arranged and fixed on the fixing surface FF with their respective slit directions changed, that is, so that the slit surfaces intersect and spread with each other. Thereby, for a total of four directions in the vertical direction and the horizontal direction, the rubber elastic force is made to act in a direction in which either the slit surface of the sponge member 1 or the sponge member 2 stays within the slit KS, so that the cable C does not come out of the slit KS, and it is possible to reduce the influence of the external force by the sponge member 1 and the sponge member 2 and perform wiring.

[0018] As described above, in the case of sponge members with slits aligned in the vertical direction as in the prior art, there is no structure to hold down the cable when it moves vertically due to vibrations, etc., so the cable may come loose from the slits in the sponge member and fall off the intended wiring route, potentially damaging the cable. However, with the wire holder of this embodiment (sponge member 1 with slits KS that are diagonal toward the inside), by using sponge members 1 and 2 side by side, each with diagonal slits KS, it is possible to wire the cable C without it coming loose from the slit KS, and with the sponge members 1 and 2 reducing the effects of external forces.

[0019] (Modification of the first embodiment) A modified example of the first embodiment is shown in Figure 3. Figure 3 is a schematic cross-sectional view of the sponge member 1 cut along a plane perpendicular to the extension direction of the cable C held by the diagonal slits KS. The modified example of Figure 3 is the same as the first embodiment except that the diagonal slits KS of the sponge member 1 have a slit surface KSC that forms a curve in the cross section perpendicular to the extension direction of the cable C.

[0020] As shown in Figure 3, by inserting a slit surface KSC that extends in three dimensions, a three-dimensional slit KS can be created, which makes it possible to further prevent the cable C from moving outward.

[0021] (Second Example) A second embodiment of the present invention is shown in Figure 4. Figure 4 is a schematic cross-sectional view of a sponge member 1 cut along a plane parallel to the extension direction of a cable C held by the diagonal slits KS. The second embodiment of Figure 4 is the same as the first embodiment, except that the diagonal slits KS of the sponge member 1 have a curved slit surface KSN that has a curved or wavy line in the cross section along the extension direction of the cable C.

[0022] The oblique slit KS has a curved slit surface KSN so as to have at least one fine contact surface SF that contacts the clamped portion of the cable C non-parallel to the extension direction.

[0023] As shown in Figure 4, by inserting a slit surface KSN that extends in three dimensions, a three-dimensional slit KS can be created, which makes it possible to further prevent the cable C from moving outward.

[0024] (Explanation of effect) As described above, according to the first embodiment, by using a sponge member having a slit KS diagonal to the wiring of the optical fiber cable C, it is possible to reduce material costs compared to conventional methods and achieve wiring in a small space.

[0025] According to this embodiment, when wiring, for example, an optical fiber cable C inside an electronic device, for the wiring of the cable C where there is concern that the functionality may be reduced due to the influence of external forces including the cable C, a wiring fixing structure that uses a soft material such as a sponge member can be obtained, a structure that holds the cable C by providing a slit KS in a three-dimensional direction, a structure that prevents the clamped cable C from falling off by providing a slit KS with a shape that expands in a three-dimensional direction, and a structure that can further prevent the cable C from falling off by changing the fixing surfaces of multiple commonly used sponge members.

[0026] (Third Example) A third embodiment of the present invention is shown in Fig. 5. Fig. 5 is a schematic diagram showing the inside of a housing BD of a closure that houses an optical fiber cable C that is clamped and held by multiple sponge members 1 to 5 each having a diagonal slit KS. Fig. 5 shows the inner wall surface of the housing BD, which is the fixing surface FF that fixes the sponge members 1 to 5 of the housing BD main body, with the cover portion of the housing BD that does not have a sponge member removed.

[0027] In the second embodiment, the cable C is fixed at only two locations, but the length of the cables C inside electronic devices varies, and two fixing locations are often insufficient. Therefore, in this embodiment, multiple sponge members 1 to 5 are fixed to the inner wall surface of the housing BD inside the housing BD, and the diagonal slits KS of each sponge member 1 to 5 are arranged so as to intersect with each other. The diagonal slits KS of each sponge member in the second embodiment are the same as those in the first and second embodiments.

[0028] In addition, the sponge member 1 is positioned so that it is exposed from the housing BD so that the cable C clamped in the diagonal slit KS at the wire entrance / exit DO of the housing BD does not touch the housing BD and the slit KS is visible from the wire entrance / exit DO.

[0029] In this way, by using a plurality of sponge members of this embodiment and arranging them in alternating directions, it is possible to fix the wiring while suppressing movement of the entire cable C due to vibrations, etc. [Explanation of symbols]

[0030] 1~5 Sponge material C Cable FF fixed surface KS Slit KSC, KSN slit surface SF contact surface BD case DO Wire entrance / exit

Claims

1. A wire holder for holding a wire a holding base portion fixed to a fixing surface extending in one direction and made of an open-cell synthetic resin foam; a slit provided in the holding base portion for clamping a portion of the wire rod and holding the wire rod along the first direction; A wire holder characterized in that the slit is provided obliquely with respect to the fixing surface.

2. 2. The wire holder according to claim 1, wherein the slit has a curved slit surface that forms a curve in a cross section perpendicular to the extension direction of the part of the wire.

3. 2. The wire holder according to claim 1, wherein the slit is provided so as to have at least one contact surface that contacts the portion of the wire in a direction non-parallel to the extension direction of the portion of the wire.

4. 2. The wire holder according to claim 1, wherein the fixing surface is an inner wall surface of a housing.

5. 5. The wire holder according to claim 4, wherein at least two of the holding base portions are fixed to the housing, and the slit surfaces of the respective holding base portions are arranged so as to intersect and widen each other.

6. 2. The wire holder according to claim 1, wherein the holding base portion is a rectangular parallelepiped.

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