JPS629745Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a connector for a light receiving element connected to an optical fiber.

[Prior art and problems]

A light-receiving element (hereinafter referred to as a PD element) and a light-receiving element (hereinafter referred to as an LED element) are used in large numbers as optical-to-electrical or electric-to-optical converters in optical communication circuits. Such optical-to-electrical converters or electrical-to-optical converters connect the terminal of an optical fiber to an optical connection housing containing a conversion element, and place the optical fiber terminal and the light-receiving surface of, for example, a PD element in close proximity. Generally, the electrical lead wire for the LED element and PD element is pulled out from the housing on the side opposite to the side where the end of the optical fiber is inserted into the optical connection housing. is often taken.

By the way, in the case of something like a PD element that receives an optical signal from an optical fiber and converts it into an electrical quantity, if there is an LED element near the optical connection housing in which this PD element is housed, this When excited and emitting an optical signal, the lead wire portion of the PD element is affected by the electromagnetic waves emitted by the electrical signal, resulting in a noise signal, so some kind of shielding must be provided.

For this reason, in the conventional optical connection housing for fixing PD elements, the PD element is inserted into the housing hole where the PD element is to be fixed, and the lead wires of these PD elements are passed through a metal hollow hole that is screwed into the hole surface. Push in the screw to fix the PD element and form a shield, and inject an insulator inside the hollow screw so that the lead wires do not touch each other to secure the lead wire extraction part. was forming.

However, as understood from the above description, it takes a relatively long time to insert the PD element, push in the hollow screw, and inject the insulator.

[Means for solving problems]

The present invention provides an optical connection housing with a collar at the end, a metal pipe placed over the outside of an insulating fixing plug having a lead wire insertion hole for a light receiving element in the axial direction, and held by the collar. Insert the assembly in which the lead wire is inserted into the wire insertion hole and the metal bottom of the light-receiving element is placed on the end of the metal pipe into the hole of the optical connection housing, and the collar inserts the light-receiving element through the metal pipe. The brim is fixed to the inner circumferential surface of the hole while being pressed against the stepped portion of the hole, and workability is significantly improved by combining a metal pipe with the fixing stopper before insertion into the hole. It was calculated by

The embodiments shown in the drawings will be described below.

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.
Although only a part of 1 is shown, optical fiber and PD
This is a housing for connecting elements, LED elements, etc. 2 is a hole into which a terminal plug on the optical fiber side is inserted, and 3 is a hole in which a PD element 4 and the like are housed. Although the PD element 4 is not shown, its upper surface that contacts the end of the optical fiber is a glass window, and the entire PD element 4 is enclosed in a metal case, from which lead wires 5 are drawn out. Reference numeral 6 denotes a fixing stopper made of molded insulator, which has an insertion hole 7 through which the lead wire 5 is passed in the axial direction, and a flange 8 is formed at the lower end thereof. Hole 3 is PD
Portion of hole 9 that holds element 4, metal pipe 12
The diameter of hole 9 is larger than that of hole 2, and there is a step between hole 2 and hole 9. part is formed. These points can be changed by design.

A spiral groove for fixing the fixing stopper 6 is formed on the inner peripheral surface of the hole 11 and the corresponding outer peripheral surface of the collar 8.

When assembling, first place the metal pipe 12 over the collar 8 of the fixing plug 6 from above and hold it with the collar 8, then pass the lead wire 5 of the PD element 4 through the insertion hole 7, and insert the metal bottom of the PD element 4 into the metal pipe 12. made pipe 1
Place it on the end of 2. In this case, the metal pipe 12
The upper edge of the PD element 4 needs to be large enough to touch the metal bottom of the PD element 4 all around.

The assembled assembly is inserted into the hole 3 of the optical connection housing 1 with the PD element 4 at the head, and the collar 8 is slightly rotated using the screwdriver groove cut on the back surface of the collar 8. The element 4 is the collar 8 of the fixed stopper 6
It is fixed in a pressed state to the stepped portions of the holes 2 and 9 via a metal pipe 12 held by a metal pipe 12 .

The collar 8 is not necessarily fixed to the hole 11 by fitting the screws described above.
This can be done by press fitting into the hole 11 of.

〔effect〕

As is clear from the above explanation, according to the present invention, the mounting of the PD element is assembled before it is inserted into the hole, so sufficient care is taken.
It is expected that there will be almost no defects after assembly, and the process of holding the metal pipe on the brim of the fixed stopper and placing the PD element on it before inserting it into the hole is extremely simple. After being inserted into the hole of the connection housing, the collar is simply fixed to the inner circumferential surface of the hole, which significantly improves work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention. 1... Housing for optical connection, 2... Optical fiber terminal plug insertion hole, 3... Hole for storing PD elements, etc.
4...PD element, 5...Lead wire, 6...Insulator fixing plug, 7...Lead wire insertion hole, 8...Brim,
9... Hole for holding the PD element, 10... Hole for storing a metal pipe, etc., 11... Hole corresponding to the brim, 12... Metal pipe.

Claims (1)

[Scope of utility model registration request] A metal pipe is placed over the outside of an insulating fixing stopper, which has a collar at the end and a lead wire insertion hole for the light receiving element in the axial direction, and is held by the collar, and the lead wire is inserted into the lead wire insertion hole. A state in which the assembly in which the metal bottom of the light receiving element is placed on the end of the metal pipe is inserted into the hole of the optical connection housing, and the light receiving element is pressed by the brim against the stepped part of the hole through the metal pipe. The light receiving element connector is characterized in that the collar is fixed to the inner circumferential surface of the hole.