JPH0640903U - Optical connector receptacle - Google Patents

Abstract

(57) [Summary] [Construction] An optical connector receptacle in which the ferrule 1 is arranged on the inner surface of the receptacle 2 is characterized in that the entire surface of the receptacle 2 in contact with the ferrule 1 is made of ceramics. [Effects] Since the entire surface of the receptacle 2 in contact with the ferrule 1 is made of ceramics, it is possible to prevent repeated attachment / detachment of the ferrule 1 and abrasion of the entire surface in contact with the ferrule 1 and the receptacle 2 due to vibration when the ferrule 1 is attached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a receptacle for an optical connector used for connecting a light emitting / receiving module, an optical link, an optical attenuator, etc. to an optical fiber.

[0002]

[Prior art]

 Conventionally, the material of the receptacle has mainly been metal such as stainless steel, and the ferrule to be inserted into this has been mainly made of zirconia or alumina ceramics.

However, since stainless steel is softer than ceramics, the ferrule is repeatedly attached and detached, and it is worn due to vibration when the ferrule is attached, and abrasion powder contaminates lenses such as the light emitting and receiving modules, and the inner surface of the receptacle. However, it has a drawback that it causes roughening or deterioration of the coupling loss of light.

[0004]

[Problems to be solved by the device]

 Therefore, in Japanese Utility Model Laid-Open No. 27407/1992, a ceramic sleeve is inserted and fixed to the inner surface of the receptacle, but the ferrule stopper with which the ferrule tip is constantly in contact is made of metal such as stainless steel. Wear is likely to occur due to repeated ferrule attachment / detachment and vibration when the ferrule is attached.

In particular, since the PC-polished ferrule hits the ferrule stopper at a point or a part thereof, considerable pressure is applied to this part, which is likely to cause wear.

Therefore, the above-mentioned problems have not been solved yet.

[0007]

[Means for Solving the Problems]

 The present invention has been made in view of the above problems of the conventional technology.In the receptacle for an optical connector in which the ferrule is arranged on the inner surface of the receptacle, the entire surface in contact with the ferrule of the receptacle is made of ceramics. Make it a summary.

[0008]

[Action]

 The entire surface that contacts the ferrule that is inserted into the receptacle is made of ceramics that has higher finishing accuracy and hardness than metal such as stainless steel, so the ferrule and the receptacle are repeatedly attached and detached due to repeated attachment and detachment of the ferrule. It is possible to prevent wear of the entire surface that comes into contact with the tuckle.

By forming the entire surface in contact with the ferrule to be inserted into the receptacle with ceramics made of the same material as the ferrule, it is possible to further prevent abrasion of the entire surface in contact with the ferrule and the receptacle.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing a receptacle for an optical connector according to a first embodiment of the present invention. In the figure, reference numeral 1 is a ferrule, which is arranged inside the sleeve 3 and the ferrule stopper 4 on the inner surface of the receptacle 2.

The sleeve 3 is made of ceramics having an inner diameter smaller than the outer diameter of the ferrule 1 by 0.2 mm or less, and is fixed to the inner surface of the receptacle 2 by press fitting or shrink fitting. Then, the inner diameter of the sleeve 3 is polished with the outer diameter of the receptacle 2 as a reference. The inner surface of the sleeve 3 is polished in order to finish the inner diameter tolerance with high accuracy and to improve the concentricity of the sleeve 3 on the basis of the outer diameter of the receptacle 2.

The ferrule stopper 4 is a ceramic ring with an outer diameter that is 0.2 mm or less less than the inner diameter of the receptacle 2 and the surface that contacts the ferrule 1 is mirror-finished. Fix it by pushing the pipe 5 from. The pipe 5 is fixed to the receptacle 2 by screwing, press fitting, or bonding.

The ferrule stopper 4 and the pipe 5 may be integrally formed of ceramics, and may be press-fitted or adhered into the receptacle 2.

Since the ferrule stopper 4 is made of ceramics, the ferrule 1 and the ferrule stopper 4 can be prevented from being worn because the hardness is higher and the finishing accuracy is higher than that of metal such as stainless steel. By making the ferrule stopper 4 the same ceramic material as the ferrule 1, it is possible to prevent repeated ferrule attachment / detachment and wear of the ferrule and ferrule stopper due to vibration when the ferrule is attached.

FIG. 2 is a schematic diagram showing a receptacle for an optical connector according to a second embodiment of the present invention. The difference from the first embodiment is how to insert the ferrule stopper.

The ferrule stopper 4 has a minor tolerance of 0.2 mm or less of the inner diameter of the receptacle 6, a ferrule 1 has a mirror ring-finished ceramic ring, and a ceramic sleeve 3 is pushed into the ferrule stopper 4. It is fixed.

The sleeve 3 is fixed in the receptacle 6 by press fitting or shrink fitting. At this time, since the inner diameter of the sleeve 3 is contracted by press fitting, it is necessary to finish the sleeve 3 in advance by an amount corresponding to the displacement due to press fitting.

For example, when a zirconia sleeve having an inner diameter of 2.5 mm is press-fitted into stainless steel having an inner diameter of 4.0 mm and an outer diameter of 5.5 mm, if the press-fitting silo is set to 5 to 10 μm, the inner diameter of the sleeve is 1 to 2 μm minus Since it will be displaced to some extent, make a large amount of this in advance.

The ferrule stopper can have an arbitrary shape according to the application.

For example, as shown in FIG. 3, the ferrule stopper 7 may be provided with a V surface to form a V-attached ring in order to prevent reflection attenuation of light.

Further, as shown in FIG. 4, the ferrule stopper 8 is recessed into a spherical surface in conformity with the shape of the tip of the ferrule, so that the ferrule is brought into contact with the surface of the ferrule and the variation in the distance due to wear can be reduced.

Of course, the ferrule stopper of FIGS. 3 and 4 can be used for both the receptacles for optical connectors of FIGS. 1 and 2, and not only the ring shape or the pipe shape but also the ferrule can be stopped. If so, any shape may be used.

[0023]

[Effect of device]

 As described above, in the present invention, since the entire surface of the receptacle in contact with the ferrule is made of ceramic, repeated attachment / detachment of the ferrule and abrasion of the entire surface in contact with the ferrule and the receptacle due to vibration when the ferrule is attached can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic view showing a receptacle for an optical connector of a first embodiment formed according to the present invention.

FIG. 2 is a schematic view showing an optical connector receptacle of a second embodiment formed according to the present invention.

FIG. 3 is a schematic view showing a ferrule stopper of the present invention.

FIG. 4 is a schematic view showing a ferrule stopper of the present invention.

[Explanation of symbols]

1 ... ferrule, 2, 6. ..Receptacles, 3.
..Sleeve, 4, 7, 8 ... ferrule stopper,
5 ... pipe.

Claims (2)

[Scope of utility model registration request] 1. An optical connector receptacle in which a ferrule is disposed on the inner surface of the receptacle, wherein the entire surface of the receptacle in contact with the ferrule is ceramics. 2. The receptacle for an optical connector according to claim 1, wherein the entire surface of the receptacle, which is in contact with the ferrule, is a ceramic material made of the same material as the ferrule.