JPH0555110U - Optical connector - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an optical connector which can stably hold an optical fiber cable in a connector mold so as not to rotate and which does not deteriorate the product. [Structure] A clamper 30 for fixing an optical fiber cable 20 in which an outer periphery of a core wire is covered with resin so as not to come out.
In the optical connector having the above, the clamper includes a plurality of contact portions 33, 34, and 35 that contact the coating portion of the optical fiber cable along the circumferential direction thereof, and the plurality of contact portions are provided. Is configured such that at least a part of the abutting portion is press-contacted or press-fitted at a position different from other abutting portions in the axial direction of the optical fiber cable.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an optical connector, and more particularly to an improvement of a clamper for fixing an optical fiber cable to this connector mold.

[0002]

[Prior Art]

 Conventionally, this type of optical connector is constructed as shown in FIGS. In this optical connector 1, an optical fiber cable 5 having a core wire 3 coated with a resin 4 is inserted into a connector mold 2 of the connector 1. The optical fiber cable 5 is supported in the connector mold 2 by a bifurcated clamper 6 as shown in FIG.

The clamper 6 holds the coating resin 4 of the optical fiber cable 5 at two positions in the longitudinal direction thereof, and each clamper 6 is inserted and fixed in the through hole 7 formed in the connector mold 2, Due to the bifurcated shape of the clamper 6, the optical fiber cable 5 is prevented from moving in the axial direction, and the optical fiber cable 5 is held in the connector mold 2.

Further, the connector mold 2 has a rectangular parallelepiped mold body 2b in which a grip concave portion 2a for gripping with fingers is formed, and a plug-in portion 2c protruding from the mold body 2b with a reduced width. It is composed of a cylindrical connecting portion 2e located at the center of the insertion portion 2c. The tip portion 3a of the core wire 3 of the optical fiber cable 5 is housed in the cylindrical connection portion 2e of the connector mold 2.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned optical connector, since the optical fiber cable 5 is clamped and fixed by the bifurcated clamper 6, only one pressure contact point of one clamp 6 against the optical fiber cable 5 is provided. Therefore, there was a problem that the holding strength and stability were insufficient.

Therefore, there is a method of increasing the number of pressure contact portions of the clamper 6 to three or more, but if the pressure contact portions with respect to the optical fiber cable 5 are merely along the circumferential direction, there are the following drawbacks.

That is, the clamper 6 needs to press the coating layer (clad) coated around the core 3 (core) of the optical fiber cable 5 to such an extent that the coating layer (clad) is not damaged. When the optical fiber cable 5 is run along the circumferential direction, an external force acts on the optical fiber cable 5 by an unexpected operation from the outside, and when the optical fiber cable 5 is rotated, the outer peripheral surface of the optical fiber cable 5, that is, the coating resin 4, an annular groove is formed along the circumferential direction, and the coating layer and the core wire 3 are damaged. Further, there is a risk that the core wire 3 may rotate, resulting in a lack of reliability of the product.

In view of the above problems, an object of the present invention is to provide an optical connector capable of stably holding an optical fiber cable in a connector mold so as not to rotate and improving product reliability. .

[0009]

[Means for Solving the Problems]

 In the present invention, the above object is to provide an optical connector having a clamper for fixing an optical fiber cable whose outer circumference is covered with resin so as not to come out. The cover is provided with a plurality of abutting parts that come into contact along the circumferential direction, and at least some of these abutting parts are different from each other in the axial direction of the optical fiber cable. This is achieved by an optical connector configured to be press-fitted or press-fitted at a position different from the contact part.

[0010]

[Action]

 According to the above configuration, the clamper is provided with a plurality of abutting portions that abut against the optical fiber cable, and at least some of the abutting portions of the abutting portions are the shafts of the optical fiber cable. It is adapted to be pressed or pressed into a position different from other contact parts in terms of direction. For this reason, the plurality of contact portions and the optical fiber cable are pressed against different positions in the axial direction, so that the optical fiber cable may rotate in the connector mold and cause a positional deviation. In addition, the cable can be more effectively prevented from coming out of the connector mold as compared with the conventional clamper.

[0011]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 to 3 are views showing a clamper which is a main part of an optical connector of this embodiment. FIG. 1 is a front view of the clamper, FIG. 2 is a bottom view of the clamper, and FIG. 3A is a clamper. Is a perspective view, and (B) is a side view.

The connector mold used in the optical connector of the present embodiment is almost the same as that shown in FIG. 5, and a duplicated description will be omitted. The difference will be centered on the configuration of the clamper. explain.

In the figure, the clamper 30 is integrally molded entirely of a metallic material such as stainless steel, and has a base 31 that engages with the through hole 16 (see FIG. 5) of the connector mold 25, and the base 31. And a ring-shaped main body 32 that is integrally formed with and is inserted into the connector mold. As shown in the figure, the base 31 is integrally formed with a large number of barb-shaped projections 31a on both sides, and is fitted on both sides of the through hole 16 of the connector mold so that the clamper 30 can be locked. .

As shown in FIG. 1, the main body 32 has a ring shape in which a part is cut out, and an optical fiber cable is pressed against the inner peripheral surface of the main body as described later. A plurality of contact portions 33, 34, 35 are provided so as to project inward. Further, as shown in FIG. 2, the open end of the ring-shaped main body is formed by being bent so as to be located slightly upward in the figure, and therefore, among the abutting portions, the abutting portion 34. And 35 are located higher than the other contact portions 33 in the figure.

3A and 3B are a perspective view and a side view, respectively, in which the base portion 31 of the clamper 30 is omitted. According to this, the contact portion 33 of the clamper 30 is It is located closer to the front side in the figure than the other contact portions 34 and 35.

The present embodiment is configured as described above, and its operation will be described below. When the clamper 30 is attached to the connector mold (not shown), the optical fiber cable 20 inserted in the connector mold can be fixed as shown in FIG.

FIG. 4 is a sectional view showing a state in which the optical fiber cable 20 extending vertically in the drawing is fixed by the clamper 30. In the figure, the abutting portions 34, 35 of the clamper 30 are in pressure contact with the left side of the optical fiber cable 20 at the upper side in the axial direction. On the other hand, the contact portion 33 is pressed against the right side circumference of the optical fiber cable 20 below the above in the axial direction.

Therefore, the optical fiber cable 20 is fixed in a state in which even if an external force is applied in the axial direction, the optical fiber cable 20 does not slip out in that direction, and the positional deviation in the rotational direction indicated by the arrow is extremely unlikely to occur. ing.

Therefore, according to this embodiment, the optical fiber does not rotate to cause a positional deviation, which does not impair the performance, and moreover, it is possible to more effectively prevent the optical fiber from slipping out in the axial direction more than the conventional connector. As a result, the reliability of the product can be improved.

By the way, the scope of the present invention is not limited to the above-described embodiment, and for example, a larger number of contact portions of the clamper can be provided.

[0021]

[Effect of the device]

 As described above, according to the present invention, an optical connector that can stably hold the optical fiber cable in the connector mold so that it does not rotate, does not deteriorate in quality, and improves the reliability of the product is provided. Can be provided.

[Brief description of drawings]

FIG. 1 is a front view showing a clamper which is a main part of a preferred embodiment of an optical connector according to the present invention.

FIG. 2 is a bottom view of the clamper shown in FIG.

FIG. 3 shows the clamper of FIG. 1, (A) is a schematic perspective view,
(B) is a side view thereof.

FIG. 4 is an explanatory view showing a usage state of the clamper of FIG. 1.

FIG. 5 is a plan view showing an example of a conventional optical connector.

6 is a side sectional view of the optical connector of FIG.

7 is a cross-sectional view of the optical connector of FIG.

[Explanation of symbols]

 20 optical fiber cable 30 clamper 31 base 32 main body 33, 34, 35 contact part

Claims (1)

[Scope of utility model registration request] 1. An optical connector comprising: a clamper for fixing an optical fiber cable whose core has an outer periphery coated with a resin so as not to come out, wherein the clamper is provided on a coating portion of the optical fiber cable along a circumferential direction thereof. A plurality of abutting portions that come into contact with each other, and at least a portion of the abutting portions are pressed or press-fitted in a portion different from other abutting portions in the axial direction of the optical fiber cable. An optical connector, which is configured as described above.