JPH0142081Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of the Invention] The present invention relates to an optical fiber cutting tool, and more particularly to an optical fiber cutting tool used when connecting the cut end of the optical fiber to a photoelectric device or the like.

[Prior art and its problems]

For example, as shown in FIG. 5, a conventional optical fiber cutting tool has a protrusion 2 on a holding part 2 that holds a cutting blade 1.
a, and is rotatably attached to the cutter support hole 4 of the case 3, and by inserting the optical fiber 6 into the plurality of holes 5 provided in the case 3 and rotating the holding part 2, the optical fiber 6 can be attached. It was intended to cut the

By the way, an optical fiber is cut and connected to an optical fiber device such as a connector or a photoelectric switch using an optical fiber, but at that time, as shown in Figure 6a, an optical fiber formed with a diameter smaller than the diameter of the optical fiber is cut. It is necessary to spread out the holding part, the protrusion of the cat 7, etc., and bring it into contact with the photoelectric element 8. However, as shown in FIG. 6b, by the time these optical fibers 6 are brought into contact with the photoelectric element 8, the ends of the optical fibers may have come into contact with the photoelectric element 8 due to the resistance of the optical fiber holding part, the cap 7, etc. Think optical fiber 6
may be connected. If the optical fiber 6 cannot be connected correctly to the photoelectric element 8 in this way,
There is a problem in that the efficiency of light emitting and receiving decreases, making it impossible to obtain a predetermined performance.

[Purpose of invention]

The present invention was developed in view of the problems encountered when connecting optical fibers to connectors and optical fiber devices. An object of the present invention is to provide an optical fiber cutting tool that enables reliable contact and connection of an optical fiber to a photoelectric element.

[Structure and effect of the idea]

The present invention includes a base that holds an optical fiber to be cut, a lid that is connected to the base at one end so as to be openable and closable, and a cutting blade that is provided on the lid and that cuts the optical fiber held by the base when the lid is closed. , a marker means held on the lid at a constant distance from the cutting blade and marking a predetermined position on the optical fiber when the lid is closed;
It is characterized by comprising the following.

According to the present invention having such characteristics, a mark is placed at a certain distance from the cut surface of the optical fiber at the same time as cutting, in accordance with the connector or the like to which the optical fiber is attached. Since this marking is applied to the coating of the optical fiber, it does not have any adverse effect on the characteristics of the optical fiber itself. When connecting the optical fiber cut in this way to a connector, photoelectric switch, etc., by inserting and fixing the optical fiber based on this mark, it is possible to reliably bring the optical fiber into contact with the photoelectric element. . Therefore, it is possible to reduce signal attenuation and variation in characteristics due to connection.

[Explanation of Examples]

FIG. 1 shows an embodiment of an optical fiber cutting tool according to the present invention, in which FIG. 1a is an elevational view, FIG. 1b is a perspective view when the tool is opened, and FIG. 1c is a side view.
As shown in these figures, the optical fiber cutting tool 10 of the present invention has a lid 12 rotatably connected to a base 11 at one end. The base 11 is provided with a V-shaped groove 13 that passes through the base 11 in the longitudinal direction, and a groove 14 having a predetermined length and a constant depth is formed perpendicular to the groove 13. A cutting blade 15 for cutting the optical fiber is vertically held at a position corresponding to the groove 14 on the lid 12 side.
A marker 16 is attached to mark the coating of the optical fiber during cutting. Further, a groove 17 in a predetermined range is formed in the lid 12 along the groove 13 of the base 11. This groove 17 has three fixing positions 17 in the longitudinal direction of the cutting tool, as shown in Figure 1a.
a, 17b, and 17c are provided. These fixing positions 17a to 17c are set at predetermined intervals from the cutting position of the optical fiber depending on the connector to be connected, and are used when fixing the marker 16 at each position.

Next, FIG. 2a is a sectional view showing the marker 16, and FIG. 2b is a side view thereof. As shown in these figures, the marker 16 holds inside cotton 18 impregnated with, for example, white ink in order to mark the optical fiber to be cut, and the underside thereof is covered with a colored member 19 such as felt. It is provided. A lid 20 is attached to the top of the marker 16, which is used to replenish ink to the cotton 18 inside the marker body. As shown in FIG.
b is formed.

Now, when cutting an optical fiber using this optical fiber cutting tool, it is necessary to decide in advance which position from the cutting surface the mark should be placed on depending on the type of equipment such as a connector or a photoelectric switch in which the optical fiber will be used. 1, open the lid 12 and mark the marker 16.
is moved left and right along the groove 17, and the elastic protrusions 21a, 2 are placed in the recesses of any of the fixed positions 17a to 17c.
1b is inserted to fix the marker 16. Then, insert the optical fiber 30 into the groove 13 of the base 11 from the right side of FIG. 1b, and insert the optical fiber 30 into the groove 13 as shown in FIG.
The optical fiber 30 is fixed to. When the lid 12 is rotated and closed, the optical fiber 30 is cut by the cutting blade 15. At this time, as shown in FIG. 3b, the optical fiber 30 is cut simultaneously.
A marking is made by a marker 16 on the side surface of the coating.

FIG. 4a shows the optical fiber 30 cut in this way.
3 is a cross-sectional view showing a state in which the connector 31 is connected to the connector 31. FIG. In this figure, the base 32 of the connector 31 is provided with cylindrical openings with female threads on the front surface, and an opening whose cylindrical axis coincides with these openings is provided at the rear to hold the photoelectric element 34 on the printed circuit board 33. are doing. The front opening of the base 32 has a through hole in the center through which the optical fiber passes.
A conical tightening portion 32a is provided.
It is assumed that a claw is provided inside this tightening portion 32a. A fastening fitting 35 is then used that engages with the female thread of this opening and contracts the fastening portion 32a. When connecting the optical fiber 30 to this connector 31, first attach the optical fiber 30 to the clamping fitting 3.
The end of the optical fiber 30 is brought into contact with the front surface of the photoelectric element 34 by passing through the through hole 5 and further through the opening of the fastening part 31a of the base 31. At this time, since a mark 30a matching the connector 31 is placed on the coating of the optical fiber 30 by the marker 16, when the end face of the optical fiber 30 comes into contact with the photoelectric element 34, the mark 30a is tightened as shown in the figure. Part 3a
The optical fiber 30 coincides with the end face of the optical fiber 30.
The contact between the cut surface and the photoelectric element 34 can be confirmed. After that, use the tightening fittings 35 to tighten the base 3.
The second tightening portion 32a is tightened and fixed as shown in FIG. 4b. In this way, the optical fiber 30 is fixed by the claws on the inner circumference of the tightening portion 32a, and the optical fiber 30 can be reliably connected to the connector 31.

In this embodiment, the coating of the optical fiber is marked with white ink or the like, but it is also possible to stamp the coating of the optical fiber itself.

[Brief explanation of the drawing]

FIG. 1a is an elevational view showing an embodiment of the optical fiber cutting tool of the present invention, FIG. 1b is a perspective view thereof, and FIG.
Figure c is a side view thereof, Figure 2a is a sectional view of the marker used in this example, Figure 2b is a side view thereof,
Figure 3a is a sectional view showing the state immediately before cutting an optical fiber using this optical fiber cutting tool;
Figure b is a cross-sectional view showing the state at the time of cutting, Figures 4a and 4b are cross-sectional views showing the state when the optical fiber thus cut is connected to the connector, and Figure 5 is the conventional cutting of the optical fiber. A perspective view showing an example of the tool, and FIGS. 6a and 6b are sectional views showing a state in which an optical fiber cut with a conventional cutting tool is connected to a connector. 10... Optical fiber cutting tool, 11, 32...
Base, 12... Lid, 13, 14, 17... Groove,
15... Cutting blade, 16... Marker, 30... Optical fiber, 31... Connector, 34... Photoelectric element,
35...Tightening metal fittings.

Claims (1)

[Claims for Utility Model Registration] (1) A base that holds an optical fiber to be cut; a lid that is openably and closably connected to the base at one end; and a lid that is provided on the lid and that when the lid is closed, the base a cutting blade for cutting the optical fiber held in the optical fiber; and a marker means held in the lid at a constant distance from the cutting blade and marking a predetermined position on the optical fiber when the lid is closed. An optical fiber cutting tool featuring: (2) The utility model registration claim is characterized in that the lid has a plurality of marker holding positions spaced apart from the cutting blade by a predetermined distance, and the gap between the cutting blade and the marker means is selected and held. Optical fiber cutting tool according to scope 1.