JPH0470703A - Photoelectric element module - Google Patents

Abstract

PURPOSE:To easily remove a stain generated in the space surrounded with a housing, a photoelectric element, and a lens by freely attaching and detaching a sleeve where the lens is fixed to and from the housing where the photoelectric element is fixed. CONSTITUTION:This module is equipped with a sleeve 21 which has a 1st through hole 39 extending from the base end to the tip and is provided with the lens 26 on the tip side of the 1st through hole 39 and where the tip part of the optical fiber 23 inserted into the 1st through hole 39 from the base end side and fitted and the housing 20 which has a 2nd through hole 31 and is provided with the photoelectric element 27 opposite one end opening part of the 2nd hole 31 and where the tip of the sleeve 21 is inserted from the other end side of the 2nd through hole 31 to screw the sleeve 21. Therefore, the sleeve 21 is separated from the housing 20 to separate the photoelectric element 27 and lens 26. Consequently, the stain generated in the space surrounded with the housing, photoelectric element, and lens can easily be removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a photoelectric element module used for converting between an optical signal and an electrical signal in communication equipment.

(Conventional technology) FIG. 4 shows this type of conventional photoelectric element module.

In the figure, 1 is a housing, 2 is an optical fiber, 3 is a ferrule, 4 is a lens, and 5 is a photoelectric element (a light emitting element or a light receiving element).

The housing 1 is made of metal and has a through hole 7 and a recess 8 communicating with the through hole 7.

The lens 4 has metal plating on its circumferential surface, and has a through hole 7.
It is inserted into one end side and the peripheral surface is soldered to the wall surface of the through hole 7.

The photoelectric element 5 is fitted into the recess 8 so as to face the lens 4, and its peripheral surface is soldered to the wall of the recess 8.

The tip of the optical fiber 2 is fixed to a ferrule 3, and the ferrule 3 is inserted into the other end of the through hole 7 so that the tip of the optical fiber 2 faces the lens 4. Further, a holding fitting 11 is screwed into the housing 1, and the flange 12 of the ferrule 3 is pressed against the end surface of the housing 1 by the holding fitting 11.

The procedure for assembling this photoelectric element module is to first solder the lens 4 to the housing 1, and then fix the ferrule 3 to the housing 1. After fitting the photoelectric element 5 into the recess 8 and adjusting the optical axis between the photoelectric element 5 and the lens 4, the photoelectric element 5 is soldered to the housing 1 to complete the process.

However, according to this conventional photoelectric element module,
Since the space 9 surrounded by the housing 1, the photoelectric element 5, and the lens 4 is completely sealed from the outside, there is no way to remove dirt if there is dirt inside the space 9. This contamination made it difficult for optical signals to be transmitted between the two. In particular, when the lens 4 and the photoelectric element 5 are fixed to the housing 1 by soldering as in this example, soldering cannot remove the flux used or dust in the air even if it enters the space 9. This flux and dust in the air become dirty, and there is also a problem that rust occurs inside the space 9. Also, when the photoelectric element 5 is soldered, the lens 4
Since the soldering process heats up the parts, there is a risk that the relative position of the photoelectric element 5 and the lens 4, which have been adjusted for light, may be shifted.

(Problems to be Solved by the Invention) As described above, in the photoelectric element module, it is not possible to remove dirt generated in the space surrounded by the housing, the photoelectric element, and the lens. This contamination may make it difficult for optical signals to be transmitted.

The present invention has been made in view of such conventional drawbacks, and an object of the present invention is to provide a photoelectric element module in which dirt generated in a space surrounded by a housing, a photoelectric element, and a lens can be easily removed. shall be.

[Structure of the Invention] (Means for Solving the Problem) The photoelectric element module of the present invention has a first through hole extending from the base end to the distal end, and a lens is provided on the distal end side of the first through hole. and a sleeve in which the distal end portion of the optical fiber is inserted and attached to the first through hole from the proximal end side;
The sleeve has a second through hole, and a photoelectric element is provided opposite to the opening on one end side of the second through hole, and the tip of the sleeve is inserted into the second through hole from the other end side. and a housing to which the housing is screwed.

(Function) In the present invention, the sleeve provided with the lens is inserted into the second through hole of the housing provided with the photoelectric element and is screwed into place, and the photoelectric element is separated by separating the sleeve from the housing. The element and lens can be separated.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 3.

1 and 2 are diagrams for explaining a first embodiment of the present invention, in which FIG. 1 is a sectional view of a photoelectric element module, and FIG. 2 is an exploded perspective view of the photoelectric element module.

In these figures, 20 is a housing, 21 is a sleeve, 22 is a sleeve holder, 23 is an optical fiber, 24 is a ferrule, 25 is a ferrule holder, 26 is a lens, and 27
is a photoelectric element (light emitting element or light receiving element).

The housing 20 is made of metal and includes a through hole (second through hole) 31 and a recess 3 that communicates with the through hole 31.
2. The photoelectric element 27 is fitted into the recess 32 and its peripheral surface is soldered to the wall of the recess 32, and is opposed to the opening of the through hole 31 on the recess 32 side (one end side). Further, a through hole 31 is provided on the circumferential surface of the housing 20.
A male thread 34 that engages with the female thread of the sleeve holder 22 is formed surrounding the other end side.

The sleeve 21 has a through hole (
It has a first through hole) 39, and a flange 40 in the middle.
is provided. Further, a male thread 42 is provided on the circumferential surface of the base end 36 side of the sleeve 21 to be screwed into the female thread of the ferrule holder 25. This sleeve 21 has a tip 37
It is fitted into the through hole 31 of the housing 20 from the side. Then, the sleeve presser 22 is attached to the male thread 34 of the housing 20.
is screwed in, and the flange 40 of the sleeve 21 is pressed against the end surface of the housing 20 by the sleeve presser 22.

The lens 26 has its circumferential surface plated with metal, and is inserted into the distal end of the through hole 39 of the sleeve 21 and soldered to the wall surface of the through hole 39. This lens 26 is positioned to face the photoelectric element 27 by inserting the distal end 37 side of the sleeve 21 into the through hole 31 of the housing 20 .

The tip of the optical fiber 23 is fixed to a ferrule 24, and the ferrule 24 is inserted into the through hole 39 from the proximal end 36 side of the sleeve 21, so that the tip of the optical fiber 23 is opposed to the lens 26. In addition, sleeve 21
A ferrule holder 25 is screwed into the male thread 42 of the ferrule 21 , and the flange 45 of the ferrule 21 is pressed against the end surface of the sleeve 21 by the ferrule holder 25 .

Next, the assembly procedure of the photoelectric element module will be explained.

First, the lens 26 is inserted into the through hole 39 of the sleeve 21 and soldered to the sleeve 21. Further, the ferrule 24 is inserted into the base end side of the sleeve 21 and the ferrule presser 25 is screwed in to fix the ferrule 24 to the sleeve 21.

Next, as shown in FIG. 2, the sleeve 21 is inserted into the through hole 31 of the housing 20, and the sleeve presser 22 is screwed into the male thread 34 of the housing 20 to fix the sleeve 21 to the housing 20.

Next, the photoelectric element 27 is inserted into the recess 32 of the housing 20, and after adjusting the optical axis between the photoelectric element 27 and the lens 26, the photoelectric element 27 is soldered to the housing 20.

In this case, if there is a risk that the relative position between the photoelectric element 27 and the lens 26 may shift due to heating during soldering of the photoelectric element 27, remove the sleeve 21 and solder the lens 26 without heating the part. The photoelectric element 27 is soldered.

After the photoelectric element 27 is soldered to the housing 20, the sleeve 21 is removed from the housing 20 in order to remove dirt such as flux and airborne dust remaining in the space 50 surrounded by the housing 20, the photoelectric element 27, and the lens 26. Remove it and clean the part corresponding to the space 50. Then, the sleeve 21 is fixed to the housing 20 again, and the assembly of the photoelectric element module is completed.

FIG. 3 is a sectional view illustrating a second embodiment of the present invention.

In the module of this example, the through hole 31 of the housing 20a
A female thread 53 is provided on the inner wall of one end of the sleeve 21
A male thread 54 is formed in the middle of a to be engaged with a female screw 53. According to this example, the sleeve 21a can be attached to the housing 20a by simply inserting and screwing the sleeve 21a into the through hole 31a of the housing 20a,
The sleeve presser 22 as in the first embodiment becomes unnecessary. The other configurations are the same as in the first embodiment.

In the above two embodiments, the lens 26 and photoelectric element 27 are fixed to the sleeve and housing by soldering, but the fixing of the lens and photoelectric element is not limited to soldering. Alternatively, a fixing method using laser welding or adhesive may be used.

[Effects of the Invention] As explained above, in the photoelectric element module of the present invention,
The sleeve to which the lens is fixed is removable from the housing to which the photoelectric element is fixed, so dirt generated in the space surrounded by the housing, photoelectric element, and lens can be easily removed by removing the sleeve from the housing. can be removed.

[Brief explanation of the drawing]

FIGS. 1 and 2 show the first photoelectric element module of the present invention.
FIG. 1 is a sectional view and FIG. 2 is an exploded perspective view. FIG. 3 is a sectional view illustrating a second embodiment of the photoelectric element module of the present invention. FIG. 4 is a sectional view of a conventional photoelectric element module. 20... Housing 21... Sleeve 23... Optical fiber 24... Ferrule 26... Lens 27... Photoelectric element 31... Second through hole 36... Proximal end of the sleeve 37... Tip of the sleeve 39... First through hole

Claims (1)

[Claims] The optical fiber has a first through hole extending from the base end to the distal end, a lens is provided on the distal end side of the first through hole, and the distal end portion of the optical fiber is inserted into the first through hole from the base end side. a sleeve attached to face the lens; a second through hole; a photoelectric element is provided at an opening on one end side of the second through hole; 1. A photoelectric element module comprising: a housing to which the sleeve is screwed while the tip of the sleeve is inserted.