JPH087301B2 - Optical fiber holding device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an optical fiber holding device that fixes and holds an optical fiber in an optical connector, a photoelectric conversion device, or the like.

[Conventional technology]

FIG. 8 shows a conventional device of this type of optical fiber holding device.

FIG. 8 is a cross-sectional view of the optical fiber holding device, in which a holding metal member 2 made of a metal material having a U-shaped cross section is provided in the hollow portion of a hollow rectangular tubular case 1. Recesses 4a and 4b for accommodating the optical fibers 3a and 3b are formed on both leg portions of the U-shape, and a female screw portion 5 is formed on one of the U-shaped leg portions. Guide recesses 6a, 6b for the optical fibers 3a, 3b are formed on the wall surface of the hollow portion of the case 1 at positions facing the recesses 4a, 4b of the holding metal fitting 2, and are tightened at positions facing the female screw portion 5. An insertion hole 7 for the screw 8 is bored.

When the optical fibers 3a and 3b are held by this optical fiber holding device, the tightening screw 8 is loosened to bring the two leg pieces of the holding metal fitting 2 closer to each other, and the guide concave portions 6a and 6b of the case 1 and the concave portions 4a and 4b of the holding metal fitting 2 are held. By inserting the optical fibers 3a, 3b between and and tightening the tightening screw 8, both legs of the holding metal fitting 2 spread in the direction of the arrow, and the optical fibers 3a, 3b are pressed by the holding metal fitting 2 on the wall surface of the case 1. Fixed.

[Problems to be Solved by the Invention]

If the optical fiber fixing method is the screw tightening method as in the above-mentioned conventional example, depending on the tightening condition of the tightening screw, for example, if the tightening is weak, the optical fiber cannot be fixed sufficiently and the optical fiber moves in the axial direction. If the tightening is too strong, the optical fiber may be deformed to deteriorate its characteristics, and there is a problem that the tightening adjustment of the tightening screw is difficult and the workability is poor.

Therefore, a first object of the present invention is to eliminate the above-mentioned drawbacks of the conventional device, and to provide an optical fiber holding device capable of fixing a stable optical fiber without requiring adjustment when fixing the optical fiber. .

A second object of the present invention is to provide an optical fiber holding device capable of fixing a plurality of optical fibers together.

[Means for solving the problem]

In order to achieve the above-mentioned first object, the present invention has a holding block housing portion for housing a holding block between an outer wall and an inner wall, and an optical fiber penetrates the outer wall and the inner wall. A case having a concentric optical fiber insertion hole and an optical fiber insertion hole through which the optical fiber penetrates, which is slidably accommodated in a holding block accommodating portion of the case in a direction orthogonal to the insertion direction of the optical fiber, and this optical fiber. A holding block having a holding portion communicating with the insertion hole, extending in the sliding direction, and having corrugated projections formed on both inner walls for sandwiching the optical fiber, and a holding block rotatably attached to the case and having a knob portion at one end. Then, the other end has an engaging portion to be engaged with the holding block, and by operating the knob portion, the holding block is provided with an optical fiber insertion hole of the holding block and an optical fiber insertion hole of the case. An outer wall and an inner wall of the case at a release position of the holding block, and a lever for moving to a fixed position where the holding portion of the holding block and the optical fiber insertion hole of the case coincide with each other. Insert the optical fiber into the optical fiber insertion hole of the holding block and the optical fiber insertion hole of the holding block, and slide the holding block to the fixed position by operating the knob part in one direction to insert the optical fiber into the holding part. At the same time, the holding block is slid to the release position by operating the knob portion in the other direction to release the fixation of the optical fiber held in the holding portion.

In order to achieve the second object, the present invention has a holding block housing portion for housing a holding block between an outer wall and an inner wall, and a concentric circle through which an optical fiber penetrates the outer wall and the inner wall. , Which has a plurality of optical fiber insertion holes, and a holding block housing portion of this case, which is slidably housed in a direction orthogonal to the optical fiber insertion direction, and has stacking engaging parts at the upper and lower ends. And a holding block having an optical fiber insertion hole through which the optical fiber penetrates, and a holding portion having a corrugated protrusion communicating with the optical fiber insertion hole and extending in the sliding direction to sandwich the optical fiber on both inner walls, and the case. Is rotatably attached to and has a knob at one end,
The other end has an engaging portion to be engaged with the holding block, and the holding block is operated by operating the knob portion to a release position where the optical fiber insertion hole of the holding block and the optical fiber insertion hole of the case are aligned with each other. And a lever for moving the holding portion of the holding block to a fixed position where the optical fiber insertion hole of the case coincides, and the optical fiber insertion holes of the outer wall and the inner wall of the case at the release position of the holding block. Insert the optical fiber into the optical fiber insertion hole of the holding block,
The holding block is slid to a fixed position by operating the knob part in one direction, and the optical fiber is sandwiched in the holding part, and the holding block is slid to the release position by operating the knob part in the other direction. It is characterized in that the fixing of the optical fiber caught in the holding section is released.

[Action]

In the optical fiber holding device according to the present invention, the optical fiber is inserted into the case by aligning the optical fiber insertion hole of the case with the optical fiber insertion hole of the holding block, and the holding block is slid so that the optical fiber is moved by the holding block. Insert and fix. In addition, a plurality of optical fiber insertion holes are provided in the case, holding blocks are stacked and formed, and after inserting the plurality of optical fibers in the case, the stacked holding blocks are slid to form a plurality of optical fibers. It can be fixed at once.

〔Example〕

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

1 to 3 show an embodiment of the present invention.
FIG. 2 is a sectional view of a main part, FIG.
The figure is a perspective view of the holding block.

In FIG. 1, 10 is an optical fiber 12 such as a photoelectric conversion device.
Is a case of an electric device for connecting to each other. In this case 10, a photoelectric conversion element 16 including a light emitting element and a light receiving element is mounted and housed on a printed circuit board (not shown). Case 10
The outer wall 10A has a plurality of optical fiber insertion holes 11A formed therein, and the inner wall 10B of the case 10 also has a plurality of optical fiber insertion holes 11B concentric with the optical fiber insertion holes 11A formed in the outer wall 10A. There is. A holding block 14 described below is housed in a holding block housing portion 10C surrounded by an outer wall 10A and inner and outer walls 10B of the case 10.

The holding block 14 is formed in a convex shape as shown in FIG. 3, engaging projections 14A are formed on both side surfaces on the convex tip end side, and leg pieces 14B are formed on both ends opposite to the convex tip end. , 14B are formed, and these two leg pieces 14B, 14B have engaging projections 1 with convex tips.
An engagement hole portion 14Ba into which 4A is fitted is formed. The holding block 14 has an optical fiber insertion hole 14 through which an optical fiber passes.
C is provided, and an optical fiber holding portion 14D is provided in communication with the optical fiber insertion hole 14C. Corrugated protrusions 14F extending in a direction orthogonal to the insertion direction of the optical fiber penetrating the optical fiber insertion hole 14C of the holding block 14 are formed on the opposing inner walls of the holding portion 14D, respectively. The dimension between the tips is selected to be smaller than the outer diameter dimension of the optical fiber 12. The holding block 14 is integrally formed of a molded product.

The tip of the convex portion of the other holding block 14 is fitted between the two leg pieces 14B, 14B of the holding block 14 to engage the protrusion on the tip side of the convex portion.
The holding blocks can be stacked by fitting 14A into the engaging hole portions 14Ba of both leg pieces 14B.
The holding blocks 14 stacked in stages are stored in the holding block storage portion 10C of the case 10 shown in FIGS. 1 and 2. An engaging piece 15A formed at one end of a lever 15 having an L-shaped cross section is fitted into the engaging hole portions 14Ba of both leg pieces 14B of the uppermost holding block 14 stacked in three steps. Lever 15
Is attached to the case 10 so as to be rotatable about a rotation shaft 15B, and a knob portion 15C of the lever 15 projects from the case 10. By rotating the lever 15 with the knob portion 15C of the lever 15, the holding block 14 slides in the holding block housing portion 10C.

Next, a method of fixing the optical fiber 12 will be described. The lever 15 is rotated to the state shown in FIG.
Optical fiber insertion holes 11A and 11B of 10A and inner wall 10B, respectively
And the optical fiber insertion hole 14C of the holding block 14 are aligned with each other. In this state, the optical fiber 12 is inserted from the optical fiber insertion hole 11A of the outer wall 10A of the case 10, and the tip of the optical fiber 12 abuts against the photoelectric conversion element 16. Optical fiber 12 case 10
Then, when the lever 15 is rotated in the direction of the arrow X shown in FIG. 1, the holding block 14 slides downward in the drawing, and the optical fiber 12 is caught in the holding portion 14D of the holding block 14. At this time, the tip of the corrugated protrusion 14F of the holding section 14D bites into the coating of the optical fiber 12 to prevent the optical fiber 12 from moving in the axial direction. In this way, the optical fiber 12 is fixed to the case 10. The optical fiber 12 is detached by rotating the lever 15 in the direction opposite to the arrow X direction to release the biting of the wavy projection 14F of the holding block 14 into the optical fiber coating.

Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a sectional view of the main part of the optical fiber holding device, and FIG. 5 is a view taken in the direction of the arrow Q in FIG. 4 with the cover removed.

In FIG. 4, reference numeral 20 denotes a case of an electric device, and a photoelectric conversion element portion 26 is mounted and accommodated in a printed circuit board (not shown) in the case 20. The case 20 is provided with a plurality of optical fiber insertion holes 21A, and a guide protrusion 21 is formed which has an optical fiber guide groove 21A (see FIG. 5) extending in communication with the optical fiber insertion holes 21A. Is provided. A plurality of optical fiber insertion holes 23A which are concentric with the optical fiber insertion hole 21A of the case 20 are formed in the cover 23 which is attached by being engaged with the guide protrusion 21 of the case 20. A holding member 24 having an optical fiber insertion hole 24A through which the guide protrusion 21 of the case 20 and the optical fiber 22 penetrate is arranged between the case 20 and the cover 23, and is formed on the guide protrusion 21 of the optical fiber insertion hole 24A. An optical fiber holding groove 24B is formed at a position facing the formed optical fiber guide groove 21A. The pressing member 24 is slid by a lever 25 attached to the case 20 so as to be rotatable around an eccentric rotation shaft 25A.

In this embodiment, the fixing method of the optical fiber 22 is a cover.
The optical fiber 22 is inserted from the optical fiber insertion hole 23A of 23, the optical fiber 22 is pushed along the optical fiber guide groove 21A of the guide projection 21, and the tip of the optical fiber 22 is inserted into the optical fiber insertion hole 24A of the holding member 24. And the photoelectric conversion element portion 26 through the optical fiber insertion hole 21A of the case 20. Then lever 25
The holding member 24 slides downward by rotating the optical fiber 22 upward, and the optical fiber 22 is sandwiched between the optical fiber holding groove 24B of the holding member 24 and the optical fiber guide groove 21A of the guide protrusion 21. Fix it. Lever 25 to remove the optical fiber 22
Is returned to the state shown in the drawing to release the pinched state of the holding member 24 by the optical fiber holding groove.

Next, FIGS. 6 and 7 show the pressing member 24 shown in FIG.
6 shows a modified example of the pressing member 241 shown in FIG. 6 with rubber bushes 242 attached to both sides of the lower end thereof, and the pressing member 243 shown in FIG. 7 has elastic protrusions 244A and 244B on both sides of the lower end, respectively.
In the modification shown in FIGS. 6 and 7, the holding member is provided when the lever 25 is in the state shown in FIG.
The workability at the time of inserting or removing the optical fiber 22 is improved by making the 241 and 243 float.

〔The invention's effect〕

As described above, according to the present invention, the optical fiber is inserted into the optical fiber insertion hole of the electric equipment case and the optical fiber insertion hole of the holding block slidably accommodated in the case, and the lever of the lever is inserted. The holding block is slid to the fixed position by operating in one direction and the optical fiber is sandwiched in the holding part, and the holding block is slid to the releasing position by operating the operating lever in the other direction and held by the holding part. Since the fixing of the embedded optical fiber is released, it is possible to easily attach the optical fiber to the case and remove the optical fiber from the case, and also to securely fix the optical fiber. it can. Further, a plurality of optical fibers can be collectively fixed by stacking the holding blocks in a stacked manner or providing a holding member having a plurality of optical fiber insertion holes, thereby reducing the area of the electric device case. It has an advantage that a plurality of optical fibers can be fixed only by spreading the optical fiber.

[Brief description of drawings]

1 to 3 show an optical fiber holding device according to an embodiment of the present invention, FIG. 1 is a sectional view of an essential part of the optical fiber holding device, and FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a perspective view of the holding block. 4 and 5 show an optical fiber holding device according to another embodiment of the present invention. FIG. 4 is a sectional view of the main part of the optical fiber holding device, and FIG. 5 is a Q arrow view of FIG. FIGS. 6 and 7 are front views showing modified examples of the pressing member in the embodiment of FIG. 8th
The figure is a cross-sectional view showing a conventional optical fiber holding device. 10,20: Case, 11A, 11B, 21A, 23A: Optical fiber insertion hole, 1
2,22: Optical fiber, 14: Holding block, 15,25: Lever, 2
3: Cover.

Claims (2)

[Claims] 1. A case having a holding block housing portion for housing a holding block between an outer side wall and an inner side wall, and a concentric optical fiber insertion hole through which an optical fiber penetrates the outer side wall and the inner side wall. , An optical fiber insertion hole that is slidably accommodated in a holding block accommodating portion of the case in a direction orthogonal to the insertion direction of the optical fiber, and communicates with the optical fiber insertion hole through which the optical fiber penetrates. Direction, the holding block having a holding portion having wavy protrusions formed on both inner walls for sandwiching the optical fiber, and a holding block rotatably attached to the case, having a knob portion at one end and the holding block at the other end. The holding block has an engaging portion to be engaged, and the holding block is moved to the release position where the optical fiber insertion hole of the holding block and the optical fiber insertion hole of the case coincide with each other by operating the knob portion. Of the holding block and the lever for moving to a fixed position where the optical fiber insertion hole of the case is aligned with each other, the optical fiber insertion holes of the outer wall and the inner wall of the case and the holding block of the holding block in the release position of the holding block. An optical fiber is inserted into the optical fiber insertion hole, and the holding block is slid to a fixed position by operating the knob portion in one direction, and the optical fiber is pinched in the holding portion while the knob portion moves in the other direction. An optical fiber holding device, characterized in that the holding block is slid to the release position by operation to release the fixation of the optical fiber caught in the holding portion. 2. A holding block housing portion for housing a holding block is provided between an outer wall and an inner wall, and a plurality of concentric optical fiber insertion holes through which an optical fiber penetrates are provided in the outer wall and the inner wall. The case and the holding block housing part of the case are slidably housed in the direction orthogonal to the insertion direction of the optical fibers, and the stacking engaging parts are provided at the upper and lower ends. A holding block having a fiber insertion hole and a holding portion having a corrugated protrusion communicating with the optical fiber insertion hole and extending in the sliding direction to sandwich the optical fiber on both inner walls, and rotatably attached to the case. Has a knob portion at one end and an engaging portion to be engaged with the holding block at the other end, and the holding block is operated by operating the knob portion so that the holding block has an optical fiber insertion hole and the case. Optical fiber insertion And a lever for moving the holding position of the holding block to a fixed position where the holding portion of the holding block and the optical fiber insertion hole of the case match, and an outer wall of the case at the releasing position of the holding block. Insert the optical fiber into the optical fiber insertion hole of the inner wall and the optical fiber insertion hole of the holding block, and slide the holding block to a fixed position by operating the knob part in one direction to sandwich the optical fiber in the holding part. An optical fiber holding device, characterized in that the holding block is slid to the release position by the operation of the knob portion in the other direction and the fixation of the optical fiber caught in the holding portion is released.