JPH01169416A - optical transmission module - Google Patents

Abstract

PURPOSE:To reduce the manufacturing cost by eliminating the need of an optical connector by allowing an optical element fitting part of a housing of an optical module to have a springy property, and also, providing a projection on an inserting part of an optical fiber. CONSTITUTION:When an optical fiber 30 is inserted to the innermost part, an optical element 20 becomes a pressed state. Subsequently, when the optical fiber 30 is drawn in the direction reverse to the time of insertion, a saw tooth part 12 expands to the inside by a springy property, penetrated into the covering of the optical fiber 30 and fixed to a housing 10. In this case, the tip of the optical fiber 30 moves, but the optical element 20 also moves to match the movement of the optical fiber 30 due to a springy property of an optical element fitting part 11, therefore, there is an effect for keeping the coupling the optical element 20 and the optical fiber 30 constant. Accordingly, the optical fiber can be connected to an optical transmission module without using an optical connector, etc. In such a way, the optical transmission module can be manufactured at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to optical transmission, and particularly to an optical transmission module suitable for manufacturing at low cost.

[Conventional technology]

In recent years, with the development of electronic devices, regulations regarding noise generated from devices have become stricter, and the introduction of optical transmission into internal wiring of devices has increased. In this case, the key point in deciding whether or not to introduce optical transmission is whether the cost is the same or lower than conventional wiring using electric cables.

A conventional optical transmission module is comprised of a base module section that contains optical elements for optical transmission, and an optical connector section that holds the base fiber. Related optical transmission modules of this type include, for example, Japanese Unexamined Patent Publication No. 5
No. 7-178208 is mentioned.

[Problem that the invention seeks to solve]

The above conventional technology connects the original mosier part and the original fiber,
The original connector is used. However, when optical connector 1-* is used, the number of parts increases and it takes time to assemble the original fiber to the original connector.
There was a problem in that it was more expensive than wiring using electric wire cables.

An object of the present invention is to provide an optical transmission module that can be manufactured at low cost without using an optical connector.

[Means to solve the inter-Zhao point]

The above object is achieved by providing spring properties to the optical element mounting portion of the I/Using of the original module and further providing a protrusion at the optical fiber insertion portion.

[Effect]

When the original fiber is fully inserted, the tip of the optical fiber pushes against the optical element. After this, when the optical fiber is pulled in the opposite direction, the optical element moves together with the tip of the original fiber due to the spring properties of the optical element mounting portion. Also, at this time, the protrusion bites into the coating of the original fiber, fixing the optical fiber.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view showing an embodiment of the optical transmission module of the present invention. In this figure, the optical transmission module of the present invention is comprised of an optical element 20, an optical element mounting part 11, and an I/Using 10 provided with a sawtooth part 12.

The housing 10 is made of resin, metal, or the like, and is made of a material that does not affect the growth of the original material.

The optical element mounting s11 is optional as long as it has a spring property and can have an increased spring property.

The sawtooth portion 12 fixes the original fiber by cutting the sawtooth into the coating of the original fiber. The shape is not * In the case of the S example, the height of the sawtooth, which is made to have spring properties to facilitate insertion and prevent the original fiber from coming off, is the same as the core of the original fiber. #At is smaller than the thickness of the coating to prevent scratches.

Next, the operation of this embodiment will be explained using FIGS. 2 and 3.

FIG. 2 shows an optical element 20 and an original fiber 50 assembled therein. Optical element 20! IF uses adhesive or the like.

FIG. 3 shows a state in which the original fiber 30 is inserted to the furthest point and the optical element 20 is pressed. Next, when the optical fiber 30 is pulled in the opposite direction from when it was inserted, the sawtooth section 12 expands inward due to its spring properties, bites into the coating of the original fiber 30, and is fixed to the housing 10, as shown in FIG. At this time, the tip of the original fiber 30 moves, but due to the springiness of the optical element attachment part 11, the optical element 20 also moves in accordance with the movement of the original fiber 30. It has the effect of keeping you constantly busy.

Next, other embodiments will be shown with reference to FIGS. 4 and 5.

FIG. 4 shows the case where the original fiber holder 40 is used.

The original fiber holder 40 is inserted from the top or side of the housing 10 to fix the original fiber 50, and by removing the original fiber holder 40, the original fiber 30 can be slid out. be.

FIG. 5 shows the housing 1100 and the fiber holding part 111.
is made movable, and by opening and closing the holding part 111, the original fiber 30 can be attached and detached.

In the above embodiment, the original fiber fixing part 13 in FIG. 4 and the optical fiber fixing part 113 in FIG. 5 are not limited to sawtooth shapes.
Any protrusion that bites into the coating of the original fiber may be used.

〔Effect of the invention〕

As explained above, in the present invention, the original fiber can be connected to the optical transmission module without using the original connector etc.
The optical transmission module can be manufactured at low cost, and has the effect of stably maintaining the coupling between the optical element and the original fiber.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a 9 o'clock cross-sectional view with the original fiber fixed, Fig. 3 is a sectional view when the original fiber is inserted, Figs. 4 and 5. 2 shows a perspective grout and a cross-sectional tooth of another embodiment. DESCRIPTION OF SYMBOLS 10... Housing, 11... Optical element mounting part, 1
2... Sawtooth part, 13... Original fiber fixing part, 20...
...Optical element, 30... Original fiber, 40... Original fiber holder, 110... Housing, 111...
Optical fiber holding part, 116...Original fiber fixing part. A1I21 Ryo Rin 4th tAλ Δρ

Claims (1)

[Claims] 1. An optical transmission module comprising an optical element and a housing that houses the optical element and has an insertion part for an optical fiber that is optically coupled to the optical element. What is claimed is: 1. An optical transmission module characterized in that the optical fiber insertion part of the housing is provided with a protrusion, the housing having a spring property that applies stress in the direction of the optical axis where the housing is coupled.