JPS6039845Y2 - Optical connector rotation stop structure - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotation stopper structure for a detachable optical connector.

Recent performance improvements in semiconductor devices and optical fibers for optical communication have been remarkable, and research and development efforts are being actively carried out in various places to put optical communication systems using these into practical use.

One of the essential devices for the practical application of this optical fiber communication system is a detachable optical connector that connects optical fibers to each other and connects an optical transceiver to an optical fiber.

This optical connector mainly consists of a plug whose main component is a plug pin and an adapter whose main component is a sleeve into which the plug pin is inserted.

Optical connectors have low connection loss, excellent stability with little variation in connection loss when connecting and disconnecting, small size, light weight, compatibility, and low cost.
Furthermore, it is required to have good operability and ease of use.

Conventionally, in the above-mentioned optical connectors, in order to reduce connection loss and reduce the variation in connection loss during connection and disconnection, the outer circumferential cutting method or the double Plug pins manufactured by the eccentric method were often used.

However, these require a lot of man-hours to manufacture, so
It has the disadvantage that it is difficult to obtain a device that is inexpensive, has little connection loss, and has little variation in connection loss during attachment and detachment.

On the other hand, if a plug is made by a heat-stretching method that does not use a peripheral cutting method, it is possible to reduce manufacturing man-hours and obtain an inexpensive optical connector. It is difficult to ensure positional accuracy, the connection loss changes greatly depending on the rotation of the plug pin, and there are also disadvantages in that a reliable optical connector cannot be obtained.

Therefore, an optical connector with a rotation-stopping structure has been produced, with a pin on the side of the plug pin itself and a slit in the adapter, but this requires a lot of manufacturing time and the structure of the plug is complicated. It had the disadvantage that connectors were difficult to obtain.

Therefore, the purpose of this invention is to provide a device that is suitable for optical fiber communication, is inexpensive, has low connection loss, has low variation in connection loss during connection and disconnection, is reliable, has a simple structure, is compact, is lightweight, has good operability, and is easy to use. An object of the present invention is to provide a rotation stopper structure for an optical connector.

In the rotation stop structure of an optical connector including a cylindrical plug pin that fixes an optical fiber on a central axis, and an adapter having a hollow hole into which the cylindrical plug pin is inserted, the rotation stop structure includes a rotation stopper structure for an optical connector that includes a cylindrical plug pin that fixes an optical fiber on a central axis, and an adapter that has a hollow hole into which the cylindrical plug pin is inserted. It has a rotation preventing protrusion that protrudes in a direction parallel to the axis, and a collar-shaped stopper that has a recess that fits into the protrusion and is coaxially fixed to the plug pin, and the plug pin is connected to the protrusion or the A rotation preventing structure is obtained for the coupled optical connector that is fitted into the recess and inserted until the flanged stopper contacts the end surface of the adapter.

This invention will be explained in detail below with reference to the drawings.

FIG. 1 is a sectional view for explaining one embodiment of this invention, and for convenience, only one side of the plug is shown.

In the figure, 100 is a plug pin using a metal pipe made by heating and stretching, 101 and 102 are metal pipes, and 103
104 is a stopper which is a member attached to the plug 100; 105 is a rotation stopper hole which is a concave portion provided in the stopper 104; 200 is an adapter;
01 is a sleeve, and 202 is a rotation stop pin.

In addition, 10 is an optical fiber with a plastic coating removed;
Reference numeral 1 denotes a plastic-coated optical fiber, 12 a sheath of the optical fiber cord, 20 a fibrous tension member disposed around the plastic-coated optical fiber, 30 an adhesive, and 50 a shrink tube.

Plug pin 100. The metal vias 101 and 102, the cap nut 103, the stopper 104, the rotation stop pin 105, and the adapter 200 are made of stainless steel.

The stopper 104 is fixed to the plug pin 100 with adhesive, and the rotation stopper pin 202 is driven into the adapter 200.

Further, the rotation stop pin 202 is fitted into a rotation stop hole 105 provided in the stopper 104, so that the plug pin 100 is prevented from rotating.

According to this configuration, the rotation stop pin 20 is attached to the adapter 200.
2, and because of its simple rotation stopper structure, it is possible to obtain an optical connector that is particularly inexpensive, has low connection loss, and has little variation in connection loss during connection/detachment.

Note that the rotation stop pin 202 may be screwed to the adapter 200, or may be fixed with adhesive, welding, or the like.

Adapter 200 for the rotation stop pin 202 shown in this embodiment
For installation, as shown in Figures 2, 3, and 4,
V grooves 210 provided on the sides of the adapter 200, respectively.
The cylindrical rotation stop pin 202 may be fixed to the end surface of the adapter 200, or the columnar rotation stop pin 202 may be fixed to the side surface of the adapter 200.

Further, as shown in FIGS. 5 and 6, the rotation stopper hole 202 provided in the stopper 104 shown in this embodiment is formed by providing a groove 106 on the side surface of the stopper 104 or by cutting the side surface of the stopper 104. A flat plane 107 may also be used.

The columnar rotation stop pin 202 may have a cylindrical shape, a semi-cylindrical shape, a triangular prism shape, a tapered shape, etc., and the groove 106 and the flat surface 107 may have a tapered shape.

The stopper 104 may have a shape other than a brim shape, and may be integrated with the metal pipe 101.

Rotation stopper hole 105 provided on the end face of stopper 104
There may be two or more concentric circles on the plug pin 100.

Having such a large number of rotation stopper holes allows the rotation stop pin 202 to be fitted into each hole to find the hole that minimizes the connection loss, thereby reducing the connection loss. have.

In addition, it is a good idea to fill in the unnecessary rotation stopper hole when the connection is made with a large connection loss.

As the material of the plug and adapter, metals other than stainless steel, thermoplastic or thermosetting resin may be used.

Further, it goes without saying that the structure of the plug except for the stopper 104 and the rotation stopper pin 202 may be other than that shown in this embodiment.

Further, the adapter 200 may include a light-emitting element including a light-receiving element, or may be of a receptacle type.

The anti-rotation structure of the optical connector according to this invention has been explained in detail using examples.The anti-rotation structure of the optical connector according to this invention has a concave shape in the optical axis direction on the member attached to the plug pin of the plug. Set up each part of
The simple structure is such that the rotation stopper pin provided on the adapter is fitted into this concave part to stop the rotation of the plug pin, so it is small and inexpensive, has good operability, and is easy to use. It has characteristics such as small size, and is especially well suited for optical fiber communication systems, so it is of great industrial quality.

[Brief explanation of the drawing]

FIG. 1 is a sectional view for explaining an embodiment of the plug pin rotation stopper structure of this connector, and FIG.
FIGS. 3 and 4 are perspective views showing other embodiments of the adapter and the rotation stop pin of the plug pin rotation stop structure of this connector, and FIGS. 5 and 6 show the concave portion of the stopper. FIG. 3 is a perspective view showing another example of the structure of FIG. In the figure, 10 is an optical fiber whose plastic coating has been removed, 11 is a nylon-coated optical fiber, 12 is an outer jacket of an optical fiber cord, 20 is a fibrous tension member disposed around the plastic-coated optical fiber, and 30 is a fibrous tension member arranged around the plastic-coated optical fiber. Adhesive, 50 is shrink tube, 100 is plug pin, 1
01 and 102 are metal pipes, 103 is a bag nut, 1o4
105 is a stopper, 105 is a rotation stopper hole, 106 is a groove provided in the stopper 104, 107 is a flat surface obtained by cutting down the side surface of the stopper 104, 200 is an adapter, 201 is a sleeve, 202 is a rotation stopper pin, 210 is a It is a V groove.

Claims (1)

[Scope of utility model registration request] In the rotation stop structure of an optical connector including a cylindrical plug pin that fixes an optical fiber on a central axis, and an adapter having a hollow hole into which the cylindrical plug pin is inserted, the rotation stop structure includes a rotation stopper structure for an optical connector that includes a cylindrical plug pin that fixes an optical fiber on a central axis, and an adapter that has a hollow hole into which the cylindrical plug pin is inserted. It has a rotation preventing protrusion that protrudes in a direction parallel to the shaft, and a collar-like stopper that has a recess that fits into the protrusion and is coaxially fixed to the plug pin, A rotation stopper structure for an optical connector that fits into a recess and is inserted and coupled until the flanged stopper comes into contact with the end surface of the adapter.