JP2000180669A - Optical connector plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive optical connector plug with a small number of pieces of parts through a simplified assembling process by integrally forming a pressure spring function on an engagement member of the optical connector plug. SOLUTION: A plug housing 203 is manufactured by integrally molding a locking part 203a engaging with the groove parts 107a of a receptacle 100 at its both point ends in such manner that a bottom part (spring part) 203b forms the pressure spring function. When a plug 200 and the receptacle 100 are mutually connected, the locking parts 203a of the plug 200 are engaged with the groove parts 107a of the receptacle 100, and the centers of the plug side ferrule 201 and a receptacle side ferrule 105 are adjusted and aligned by a split sleeve 204. Further the end surfaces of the plug side ferrule 201 and the receptacle side ferrule 105 are closely contacted with one another by pressing action of the bottom part 203b, and the optical output of a LD 101 can be efficiently transmitted. Whereby a conventional pressing spring becomes unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber connector structure used for optical communication and the like, and more particularly to an optical connector plug structure connected to a receptacle type planar mounting optical coupler.

[0002]

2. Description of the Related Art In optical communication and the like, a receptacle type optical coupler having an LD mounted on a connection between a semiconductor laser (hereinafter, LD) as a signal light source and an optical fiber as a transmission medium is used. In particular, within a circuit board, a receptacle-type planar mount optical coupler is used for connection with an optical fiber from the outside.

FIG. 3 is a configuration diagram of a receptacle-type planar mount optical coupler and an optical connector plug inserted and coupled thereto. The configuration is shown below. In FIG. 3, reference numeral 100 denotes a receptacle type planar mounting optical coupler (hereinafter, “receptacle”), 4
Reference numeral 00 denotes a light connector plug (hereinafter, plug).

[0004] The configuration of the receptacle 100 will be described. 1
Reference numeral 01 denotes an LD, and reference numeral 102 denotes a photodiode (hereinafter, PD) that monitors the optical output of the LD. 103 is LD
An optical fiber for transmitting the optical output of the optical disk, the end face on the LD 101 side is processed into a spherical end, a mirror surface oblique, or a mirror surface flat. Reference numeral 104 denotes a silicon substrate having a V-shaped groove for mounting the LD 101 at high density. The LD 101 is mounted on the silicon substrate 104 with submicron accuracy, and the PD 102 is fixed behind the LD 101 with solder or the like.

The optical fiber 103 is made of a silicon substrate 104
Are aligned and positioned by the V-grooves, and are adhesively fixed. LD1
The optical coupling section composed of the optical fiber 01, the PD 102, and the optical fiber 103 is potted and sealed with a transparent resin or the like. 105 is adhesively fixed the optical fiber 103 inside,
This is a ferrule whose outside is fixed to a silicon substrate 104 by bonding or the like and whose end face is mirror-finished together with the optical fiber 103. 106 is a lead frame. Reference numeral 107 denotes a resin molded package having a groove 107a for locking a plug 400 described later and integrally processed.

Next, the configuration of the plug 400 will be described. 4
Reference numeral 02 denotes an optical fiber provided on the plug 400 side, and reference numeral 401 denotes a ferrule having the optical fiber 402 inserted and fixed therein and having an end face mirror-finished with the optical fiber. Reference numeral 403 denotes a plug housing formed of a spring resin, and reference numeral 404 denotes a pressing spring. Both ends of the distal end of the plug housing 403 are provided with a locking portion 403a fitted into a groove 107a provided in the receptacle and a ferrule 4
01 has a holding unit 403b. The ferrule 401 includes a holding portion 403b and a pressing spring 404.
Is held in the plug housing 403. 405
When the plug 400 is connected to the receptacle 100, the ferrule 401 on the plug 400 side and the receptacle 10
This is a split sleeve for aligning the zero-side ferrule 105 with the center.

With the configuration described above, the receptacle 100
The operation of connecting the plug 400 is shown in FIG. When the plug 400 and the receptacle 100 are connected to each other, the locking portion 403a of the plug 400 is
The ferrule 401 on the plug 400 side and the ferrule 105 on the receptacle 100 side are aligned by the split sleeve 405. At this time, the pressing spring 404
Of the ferrule 401 and the ferrule 10
5, the end faces are closely connected to each other. As a result, the optical output of the LD 101 is changed from the optical fiber 103 on the receptacle 100 side to the optical fiber 402 on the plug 100 side.
Is transmitted to

[0008]

In recent years, the demand for optical fiber connector parts has increased due to the spread and development of optical communication. Accordingly, cost reduction of optical fiber connector parts is required. However, in the above-mentioned prior art, the optical connector plug is composed of the ferrule, the plug housing as the locking member, and the pressing spring. There was a point.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a low-cost optical connector plug in which the number of components is smaller than that of the conventional one and the assembling process is simplified.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to an optical connector plug connected to a receptacle type planar mount optical coupler, wherein a pressing spring is integrally formed with a locking member of the optical connector plug. It is characterized by forming a function.

The pressing spring function is formed at a position orthogonal to the optical fiber. Further, the pressing spring function is characterized in that a part of both side portions of the locking member of the optical connector plug is bent inward.

[0012]

FIG. 1 is a configuration diagram showing the configuration of the present invention. FIG. 1 shows the configuration of an optical connector plug (hereinafter, plug) 100 according to a first embodiment of the present invention, and a receptacle type planar mounting optical coupler (hereinafter, receptacle) 200 connected to this plug. ing.

The receptacle 100 in this embodiment is
It has the same structure as the receptacle 100 of FIG. Therefore, the reference numerals of the components of the receptacle 100 shown in FIG. 1 are the same as those of the components of the receptacle 100 shown in FIG. 3, and a detailed description thereof will be omitted.

In FIG. 1, reference numeral 200 denotes a receptacle 10
0, which is described in detail below. 2
Numeral 02 denotes an optical fiber, 201 denotes an optical fiber 202 from the outside, which is inserted and fixed therein.
2 is a ferrule which is mirror-finished together with 2.

Reference numeral 203 denotes a U-shaped locking member (hereinafter referred to as a plug housing) formed of a spring resin, which is a main element of the present invention. Plug housing 203
The locking portion 203a whose both ends are fitted into the groove 107a of the receptacle 100 is integrally formed so that the bottom portion (spring portion) 203b forms a pressing spring function. At this time, the bottom portion 203b is formed at a position orthogonal to the optical fiber 202. The plug 200 is configured by fastening and fixing the ferrule 201 to the center of the bottom portion 203b of the plug housing 203.

Reference numeral 204 denotes the plug 200
This is a split sleeve for aligning and aligning the ferrule 201 on the plug side and the ferrule 105 on the receptacle side when connecting to 00.

When connecting the plug 200 and the receptacle 100 configured as described above to each other, the plug 2
00 is formed in the groove 10 of the receptacle 100.
The ferrule 201 on the plug side and the ferrule 105 on the receptacle side are aligned by the split sleeve 204. Further, the end surface of the ferrule 201 on the plug side and the ferrule 105 on the receptacle side are brought into close contact by the pressing action of the bottom portion 203b, and the optical output of the LD 101 is transmitted to the optical fiber 202 with high efficiency.

In this embodiment, the use of a spring resin as the material of the locking member has been described in detail. However, a spring plate may be used. Further, it is needless to say that various materials can be considered as the material of the locking member.

FIG. 2 is a configuration diagram showing the configuration of the second embodiment of the present invention. FIG. 2 shows the configuration of an optical connector plug (hereinafter, plug) 300 according to a second embodiment of the present invention, and a receptacle-type planar mounting optical coupler (hereinafter, receptacle) 100 connected to the plug. ing.

In FIG. 2, reference numeral 300 denotes the receptacle 100
Plug to connect to. Note that the configuration of the ferrule 301 and the split sleeve 304 in the receptacle 300 is the first
Ferrule 201 and split sleeve 204 in the embodiment of FIG.
Therefore, the detailed description of the ferrule 301 and the split sleeve 304 shown in FIG. 2 will be omitted.

Further, the receptacle 1 in the present embodiment
Reference numeral 00 also has the same structure as the receptacle 100 of FIG. 3 as in the first embodiment. Therefore, the receptacle 1 shown in FIG.
The reference numerals of the components of 00 are the receptacle 1 shown in FIG.
The same reference numerals are used for the components of 00, and the detailed description thereof will be omitted.

Reference numeral 303 denotes a U-shaped locking member (hereinafter referred to as a plug housing) formed of a spring plate, which is a main element of the present invention. Plug housing 303
Has a locking portion 303a whose both ends are fitted into the groove 107a on the receptacle side. In the plug housing 303, a spring portion 303b having a pressing spring function and a holding portion 303c for holding the ferrule 301 are integrally formed on both side portions thereof. The spring portion 303b has a structure in which a part of both side portions of the locking member 303 is bent inward. Ferrule 301
The plug 300 is configured by attaching to the locking member 303 by the spring portion 303b and the holding portion 303c. Therefore, this spring portion 303b is
1 and the plug housing 303 have a pressing spring function.

As described above, when the plug 300 and the receptacle 100 are connected to each other, the engaging portion 303a of the plug 300 is fitted into the groove 107a of the receptacle 100, and the ferrule 301 on the plug side and the ferrule 105 on the receptacle side. Are aligned by the split sleeve 304. Further, the ferrule 301 on the plug side and the ferrule 1 on the receptacle side are pressed by the pressing action of the spring portion 303b.
The optical output of the LD 101 is transmitted to the optical fiber 302 at a high efficiency because the end face of the LD 05 is in close contact.

The present invention is not limited to the above-described first and second embodiments, but applies to all optical connector plugs having a structure in which a locking spring member is integrally formed with a locking member. It goes without saying that it is applicable.

[0025]

As described above in detail, according to the present invention, in the optical connector plug connected to the receptacle type planar mount optical coupler, the structure in which the locking member is formed integrally with the pressing spring function. By adopting, the pressing spring conventionally used can be eliminated. As a result, the number of components of the device can be reduced, and the manufacturing process can be simplified. As a result, the cost of the optical connector plug can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a conventional example.

[Explanation of symbols]

100 Receptacle type surface mount optical coupler (receptacle) 101 Semiconductor laser (LD) 102 Photodiode (PD) 103 Optical fiber 105 Ferrule 107 Resin mold package 107a Groove 200 Optical connector plug (plug) 201 Ferrule 202 Optical fiber 203 For locking Member (plug housing) 203a Locking part 203b Bottom part (spring part) 204 Split sleeve 300 Optical connector plug (plug) 301 Ferrule 302 Optical fiber 303 Locking member (Plug housing 9 303a Locking part 303b Spring part 303c Holding part 304 split sleeve

Claims (5)

[Claims] 1. An optical connector plug connected to a receptacle-type planar mount optical coupler, wherein a locking spring function is formed integrally with a locking member of the optical connector plug. 2. The pressure spring function is formed at a position orthogonal to the optical fiber.
Optical connector plug as described. 3. The optical connector plug according to claim 1, wherein the pressing spring function is configured such that a part of both sides of the locking member of the optical connector plug is bent inward. 4. The optical connector plug according to claim 1, wherein the locking member uses a spring resin. 5. The optical connector plug according to claim 1, wherein the locking member uses a spring plate.