JPS60235108A - Optical waveguide - Google Patents

Abstract

PURPOSE:To protect a photoconductor rod against an external damage and to eliminate a light leak from the rod by supporting the photoconductor rod with balls at the inner peripheral part of a spacer and engaging projections of the outer peripheral part with grooves in the internal surface of a protection pipe. CONSTITUTION:The projections 3a on the external surface of the spacer 3 are engaged with plural axial grooves 2a in the internal surface of the protection pipe 2 to move the spacer 3 freely in the pipe 2, and the photoconductor rod 1 is supported with balls 5 and springs 7 provided in plural tapered holes 4 of the spacer 3. Thus, the rod 1 is arranged in the protection pipe 2 across the spacer 3, so the rod 1 is protected against an external damage and loss such as a light leak from the rod 1 is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to light conduits for transmitting light energy.

In the past, practitioners of branch art have frequently proposed that the great sunlight be focused with a lens or the like, introduced into a light guide, and then transmitted through the light guide to an arbitrary point ψ for use in enlightenment or other purposes. did. On the other hand, as the light guide, it is generally considered to use a light guide cable or a conductor (for example, quartz) loft. However, the photoconductor rod had defects such as the fact that the outer surface of the rod was not subjected to any additional T, and as a result, the outer surface was susceptible to scratches and light leaked from there. Also, when implementing
Although it is necessary to support the light guide rod by some means, there are problems such as light leaking from the support portion.

Purpose The present invention was made in view of the above-mentioned circumstances.
In particular, this invention aims to provide a light guide tube in which a light guide rod is disposed within the pipe to protect it from external damage, and the light guide rod is supported within the pipe to prevent light from leaking. .

Structure FIG. 1 is a side sectional view for explaining one embodiment of the light guide according to the present invention. As shown in FIG. 2, several grooves 2a are cut in the inner surface of the protective pipe 2 to extend in the ill+ direction and along the circumferential direction. As shown in FIG. 3, a protrusion 3a that engages with the groove 2a is provided along the circumferential direction on the outer surface of the protrusion 3a. Therefore, by aligning the groove 2a of the pipe 2 and the projection 3a of the spacer 3, the spacer 3 can freely move in the axial direction within the pipe 2. Further, as shown in FIG. 3, the spacer 3 includes a plurality of spacers (at least three or more
) tapered holes 4 are provided, and a pole 5 is accommodated in each hole 4. In addition, on the inner surface of each hole 4, there is a screw 4a.
A lid 6 is provided so as to fit inside the screw 4a, and a compression spring 7 is provided between the pawl 5 and the gap 6. Therefore, a portion of each pole 5 protrudes from the inner surface of the spacer 3, and this protrusion supports the light guide rod 1, and the supporting force can be adjusted three times by adjusting the degree of ugliness of the lid 6. can. 1 for 11 catties. After installing a predetermined number of poles in the spacer 3, insert the spacer 3 into the light guide rod l, and then insert the spacer 3 into the groove 2 of the protection pipe 2.
a and the protrusion 3a of the spacer 3, and insert the light guide rod 1 into the protection pipe 2 by a predetermined amount. Then,
The next spacer is fixed to the light guide rod 1 in the same manner as described above by aligning the protrusion 3a with the groove 2a, and then the light guide rod 1 is inserted into the protection pipe 2 by a predetermined amount. Thereafter, by repeating the same operations, the light guide rods 1 can be arranged within the protective pipe 2 with the spacers 3 at a predetermined gap d and a predetermined spacing. As mentioned above,
The light guide rod 1 is housed in the protective pipe 2 17, and finally,
In order to prevent the light guide rod from moving in the 7:1 direction, for example, injection holes 2b are drilled in advance at a predetermined interval in the protection pipe 2, and adhesive is injected through the injection holes 2b. to secure the spacer 3 to the protective pipe 2.

FIG. 4 is an enlarged sectional view showing another embodiment of the spacer.
In this embodiment, the pole 5 is initially held in the cage 4 by a wire 8 or the like as shown, and when the spacer 3 is positioned in a predetermined position on the light guide rod l, the wire 8 is cut. is in contact with the light guide rod l;
Hereinafter, as described above, the light guide rod 1 is attached to the protective pipe 2.
hold within. Specifically, one end of the wire 8 is connected to the pole 5
The other end is held in the state shown in the figure by soldering or the like to the lid 6 so as not to protrude from the inner circumferential surface of the spacer 3. In this state, the spacer 3 is inserted into the light guide rod 1 and held in place. After that, the solder on the lid 6 side is melted, and a part of the pole 5 is caused to protrude from the inner circumferential surface of the spacer 3 by the pressing force of the spring 7, and is fixed to the light guide rod l.

Therefore, according to this embodiment, when inserting the spacer 3 into the light guide rod 1, the pole 5 does not touch the light guide rod 1; It won't damage the rod.

As described above, in the present invention, since the light guide rod l and the pole 5 are in point contact, it is possible to minimize the possibility of light transmitted within the light guide rod 1 leaking from the point contact portion. I can do it.

As is clear from the explanation of the effects, according to the present invention, since the light energy is transmitted using the light guide rod, the cost I can be reduced. Further, there are advantages in that there is no loss such as light leakage from the light guide rod, and the light guide rod can be protected from damage.

[Brief explanation of the drawing]

FIG. 1 is a side cross-sectional view for explaining one embodiment of the light pipe according to the present invention, FIG. 2 is a cross-sectional view of the protection pipe, and FIG. 3 is a cross-section when a spacer is bonded to the light pipe rod. 4 are sectional views showing other examples of spacers. ■...Light conductor rod, 2...Protection pipe, 3...
Spacer, 4...hole, 5...pole, 6...lid,
7...Spring.

Claims (1)

[Claims] A light guide loft and an afterglow, including a protective pipe through which a conductor rod is inserted, and a spacer that supports the light guide rod with a predetermined gap with respect to the protect pipe and with a predetermined spacing in the axial direction. The spacer is a conduit, and the spacer has a plurality of balls along the circumferential direction on the inner periphery that contacts the optical rod, and has a plurality of protrusions along the circumferential direction on the outer periphery, and has a plurality of balls along the circumferential direction on the outer periphery, and has a plurality of balls along the circumferential direction in the outer periphery. 1. An optical conduit, characterized in that the pipe extends in the axial direction on an inner circumferential surface and has a double-barged groove along the circumferential direction, and the gauge groove and the protrusion engage with each other.