JP3175272U - Optical cable fixing structure - Google Patents

Abstract

An optical cable fixing structure that can be applied to a plurality of types of optical cables and can be easily fixed is provided with a simple configuration.
An optical cable housing case has a notch groove-like optical cable H at the back of a drawing port 3 and a fixed holding plate 6 erected from the bottom 1A of the housing, and a rising wall facing the fixed holding plate. A cable holding portion composed of a movable holding plate 5 that is elastically deformed in a direction away from the fixed holding plate by being cantilevered inside is arranged, and one or a plurality of triangular prisms are formed inside these holding plates. The anti-slip projections 5A are provided in a projecting manner, and the upper surfaces of these anti-slip projections are defined as tapered surfaces 5T descending inward.
[Selection] Figure 7

Description

The present invention relates to an optical cable fixing structure in an optical cable storage case used when wiring an optical cable.

  In wiring of an optical cable, an extra length portion is wound and stored, and an optical cable storage case is known. These storage cases are usually provided with an optical adapter for easily connecting optical connectors to each other, and are provided with a plurality of inlets for drawing the optical cable from the outside.

  In this case, the drawn optical cable must be fixed in the vicinity of the drawing port, and several proposals have been made in this regard.

  That is, Patent Document 1 discloses a device in which an optical cable is fitted and fixed from above between a pair of wall-shaped holding portions 161a and 161b erected from the bottom surface of the storage case (see FIG. 7). A plurality of projections 161c are provided on the opposing inner surface sides of these holding portions 161a and 161b, and the portion of the coating resin Fb of the optical fiber cable F into which these projections are fitted is held.

  Further, in Patent Document 2, the boundary between the base piece 30 and the bent piece 31 of the elastic pressing springs 3, 3 a to 3 c is engaged with the concave portion of the optical cable, and the protrusions 11, 12, 13 on the body 1 are engaged. A device is disclosed in which an optical cable is sandwiched and held between the side surfaces 110, 120, the left side surface 130, and the right side surface 131 and the holding springs 3, 3a to 3c.

Japanese Patent Laid-Open No. 2004-61984 JP 2007-192932 A

  The idea described in the publicly known document 1 is to realize fixing of an optical cable with a simple structure. However, since the optical cable is fitted and fixed between the pair of wall-shaped holding portions 161a and 161b from above, there is a problem that the fixable optical cable is limited to a thickness that allows fitting. In this case, since the projection 161c that protrudes from the inner surface of the holding portions 161a and 161b that bites into the coating resin of the optical cable, there is some tolerance, but it is a little thinner than the thickness of the coating resin.

  In addition, since the optical cable is strongly inserted from above between the pair of wall-shaped holding parts, there is a possibility that the insertion may not be smoothly performed. It is also expected to damage the layer.

  On the other hand, the device described in the known document 2 holds the optical cable by holding the elastic U-shaped holding springs 3, 3 a to 3 c and the protrusions 11, 12, 13 of the body 1 (storage case). Since it has a structure, it can be applied to optical cables having a plurality of thicknesses and can be easily fixed, but on the other hand, since a metal holding spring is required as a separate member, there is a problem that parts cost and assembly cost increase.

  The present invention was created in view of the above-mentioned problems of the prior art, and aims to provide an optical cable fixing structure that can be used for a plurality of types of optical cables and that can be easily fixed with a simple configuration. And

  That is, the optical cable fixing structure of the present invention comprises a casing portion having a rising wall around it and a lid portion covered by the casing, and the rising wall has a notch groove for drawing the optical cable from the outside into the casing. In the optical cable storage case provided with a cylindrical lead-in port, a fixed clamping plate standing from the bottom of the housing behind the opening of the rising wall lead-in port, and a piece inside the rising wall facing the fixed clamping plate By being held and supported, it consists of a movable holding plate that elastically swings and deforms in a direction away from the fixed holding plate, and one or more anti-slip projections in the form of triangular prisms project from the inside of these holding plates. Further, the present invention is characterized in that a cable holding portion having a configuration in which the upper surfaces of these anti-slip projections are tapered surfaces that descend downward is provided.

  In addition, here as the second device, in the above device, an optical cable presser is provided at the lower end of the lid part by providing a protrusion inserted into the lead-in port of the housing part when the cover is covered, and this optical cable presser corresponds to the height of the optical cable. Also disclosed is a device that can be cut to the specified dimensions.

  Therefore, according to the optical cable fixing structure of the present invention, the movable holding plate is elastically deformed in the direction away from the fixed holding plate with respect to the fixed holding plate standing from the bottom of the housing. If the optical cable is press-fitted from above, the movable clamping plate is elastically deformed in accordance with the thickness of the optical cable, so that it is possible to cope with optical cables having a plurality of thicknesses.

  In addition, since a triangular prism-shaped non-slip projection protrudes on the inner side of the sandwiching plate, it can be surely fixed by biting into the coating resin of the optical cable into which they are press-fitted.

  By the way, in the device described in Patent Document 2, the holding spring having elasticity has a U-shaped cross section, and a line portion serving as a fulcrum for elastic oscillation is arranged in parallel to the axis of the optical cable to be press-fitted. That is, in the said device, the location used as the fulcrum of a rocking | fluctuation of a presser spring is located above a storage case, and the front-end | tip of a rocking location is located below a storage case. Therefore, it is difficult to form such a presser spring integrally with the housing case due to the problem of the mold due to the occurrence of an undercut portion, and it is unavoidable to use a separate member with high momentum.

  On the other hand, in the fixed structure according to the present invention, the movable holding plate is configured in a straight line, and the line portion serving as a fulcrum for elastic oscillation is arranged orthogonal to the axis of the optical cable to be press-fitted. That is, in this device, the movable clamping plate is located at a position serving as a fulcrum of swing and the tip of the swing position in the plane direction of the housing case. Therefore, by adopting a structure in which the housing case is cantilevered inside the rising wall of the housing case, it can be easily integrally formed with the housing case, the die can be easily removed, and the manufacturing cost can be reduced.

  On the other hand, in the device disclosed in Patent Document 2, when the presser spring is pressed into the optical cable, the portion parallel to the axis of the optical cable is elastically oscillated in the direction orthogonal to the axis, so that the press-in from above proceeds smoothly. In contrast, in this device, when the optical cable is press-fitted, the portion of the movable clamping plate parallel to the optical cable axis moves greatly in the tip direction relative to the fulcrum direction, so that the press-fitting from above proceeds smoothly. There is a risk of not. Therefore, in this device, by pressing the upper surface of the triangular prism-shaped anti-slip projection on the inner side of the holding plate, which is a contact point with the optical cable, into a tapered surface that descends inward, press-fitting from above is smooth. I want to go on.

  Next, in the second device, an optical cable presser can be cut to a size corresponding to the height of the optical cable by providing a projection inserted into the drawing port of the housing when the cover is placed at the lower end of the lid. Therefore, the optical cable can be securely fixed according to not only the thickness of the optical cable but also the height.

The disassembled perspective view of the optical cable accommodation case which employ | adopted the optical cable fixing structure of this device. The top view of a housing | casing part same as the above. The top view of the principal part same as the above. The top view of a cable clamping part location same as the above. The front view of a cable clamping part location same as the above. The perspective view of a cable clamping part location same as the above. The perspective view of the cable clamping part location which shows a use condition same as the above. The perspective view of the cable clamping part location which shows a use condition same as the above. The top view of the cable clamping part location which shows a use condition same as the above. The top view of the cable clamping part location which shows a use condition same as the above. The front view of the optical cable holding | suppressing location which shows a use condition same as the above. The front view of the optical cable holding | suppressing location which shows a use condition same as the above. The front view of the optical cable holding | suppressing location which shows a use condition same as the above.

  Hereinafter, specific examples of the optical cable fixing structure of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing an example of an optical cable housing case in which the optical cable fixing structure of the present invention is implemented. The optical cable housing case in this embodiment is composed of a casing portion 1 having a rising wall 2 around it and a lid portion 10 covered by the casing portion 1, and these are molded of plastic. In addition, the code | symbol 7 in a figure is the winding part erected in the cylinder shape from the bottom part 1A of the housing | casing part 1 in order to wind the extra length part of the optical cable accommodated in a case. Reference numeral 8 in the figure denotes an optical adapter for easily connecting optical connectors to each other, and one end of the optical adapter is exposed to the outside and provided in the housing unit 1.

  The housing portion 1 is provided with a drawing port 3 for drawing the optical cable H from the outside into the housing. In this embodiment, the inlets 3 are provided at three locations near the corners and at one location near the optical adapter, but the number and positions are of course not limited thereto.

  The lead-in port 3 is formed in the shape of a notch with an open top, and the cable holding portion 4 of the present invention is provided behind the opening. 3 to 10 are diagrams showing the details. The cable sandwiching portion 4 is supported by a fixed sandwiching plate 6 erected from the bottom 1A of the housing portion 1 and cantilevered inside the rising wall 2 so as to face the fixed sandwiching plate, The movable holding plate 5 is elastically oscillated and deformed in the separation direction. In this embodiment, the fixed clamping plate 6 is integrally formed with one end contacting the rising wall 2 and the lower end contacting the bottom 1A. On the other hand, the movable clamping plate 5 is integrally formed with one end in contact with the rising wall 2, but the lower end is not connected to the bottom 1A as shown in FIG. Therefore, the movable holding plate 5 formed integrally with the housing portion 1 and plastic can be elastically oscillated and deformed in the direction away from the fixed holding plate 6 with one end as a fulcrum.

  On the inner side of the fixed clamping plate 6, one or a plurality of non-slip projections 6 </ b> A each having a tapered shape with a tapered surface 6 </ b> T descending inward toward the inner side are also provided on the inner side of the movable clamping plate 5. One or a plurality of anti-slip protrusions 6A having a triangular prism shape projecting inwardly is provided as a tapered surface 6T.

  According to the cable clamping unit 4 having the above configuration, the movable clamping plate 5 is elastically oscillated and deformed in the direction away from the fixed clamping plate 6 with respect to the fixed clamping plate 6 erected from the bottom 1A of the housing 1. 7 to 8, when the optical cable H is press-fitted between them, the movable holding plate is elastically deformed according to the width of the optical cable so that the optical cable H is interposed between the fixed holding plate and the movable holding plate. It is pinched. FIG. 9 is a view showing a state where an optical cable H having a large thickness is held, and FIG. 10 is a view showing a state where an optical cable having a small thickness is held.

  In the above case, since the upper surface of the triangular prism-shaped anti-slip projection on the inner side of the holding plate, which is a contact point with the optical cable H, is a tapered surface that descends inward, the force for press-fitting the optical cable from above is movable. The sandwiching plate 5 is dispersed by the force of pushing the sandwiching plate 5 away from the fixed sandwiching plate 6 and can be smoothly press-fitted. As is clear from this description, it is desirable that the triangular columnar anti-slip projections have a particularly large projection amount toward the movable clamping plate 5 side 5A.

  11 to 13 are diagrams showing details of the second device. Here, the optical cable holder 11 can be cut to a size corresponding to the height of the optical cable H by providing a projection inserted into the drawing-in port 3 of the housing part 1 when the lid 10 is covered at the lower end of the lid part 10. It is said. Accordingly, as shown in FIG. 11, the optical cable holder 11 is left as it is, the drawing-in port where the optical cable is not drawn in is closed, and as shown in FIG. Thus, the optical cable H corresponding to a low height can be dealt with by cutting long.

H Optical Cable 1 Housing 3 Retracting Port 4 Cable Nipping Portion 5 Movable Holding Plate 5A Anti-slip Projection 5T (of Non-Slip Protrusion) Tapered Surface 6 Fixed Fixing Plate 6A (Anti-Slip Protrusion) 6T Taper surface (of non-slip projection) 10 Lid
11 Optical cable holder

Claims (2)

An optical cable storage case comprising a casing portion having a rising wall around it and a lid portion covered by the casing, and having a notch groove-shaped inlet for drawing the optical cable from the outside into the casing on the rising wall In this case, a fixed clamping plate is provided behind the opening of the rising wall lead-in port and is cantilevered on the inner side of the rising wall so as to face the fixed clamping plate. It consists of a movable clamping plate that elastically swings and deforms in the direction away from the plate, and one or more anti-slip projections in the form of triangular prisms project from the inside of these clamping plates, and the upper surfaces of these anti-slip projections An optical cable fixing structure comprising a cable holding portion having a tapered surface that descends inward. 2. An optical cable according to claim 1, wherein an optical cable presser is provided by providing a projection inserted into a drawing port of the housing part at the bottom of the lid part so that the optical cable presser can be cut to a size corresponding to the height of the optical cable. Fixed structure.

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