JPH02109006A - Guide pin fitting structure - Google Patents

Abstract

PURPOSE:To offer an optical connector or an optic-electric multiple connector having a precise positioning mechanism and a rotation preventing mechanism of a guide pin by engaging a double face width part of the front or the rear part of an insert member provided in an optical connecting part housing and a double face width part of the guide pin. CONSTITUTION:By providing an insert member 6 finished with high accuracy in an optical connector part housing 12, and engaging the engaging part 7 of a guide 1 finished with high accuracy in the same way, a guide pin fitting structure being free from an axial shift and dislocation is obtained. Also, by engaging a double face width part 8 of the front of the optical connector part housing 12 and a double face width part 9 of the guide pin 1, a function of a guide pin turn-stop at the time of holding and fixing the housing 12 to a printed wiring board 11 with the guide pin 1 and a fixing screw 10 can be attained. Also, by providing the double face width parts 8, 9 on the part of a rear face 20 of the housing 12, as well, the guide pin turn-stop function can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a composite connector that combines optical and electrical components, and particularly relates to the structure of mounting guide pins in an optical connector portion that requires precise positioning.

[Conventional technology]

As a conventional example, there is a paper Nn54-2 "Plug-in optical connector section" (P3-349) (Ando et al.) published in the National Conference of the Telecommunications Division of the Institute of Electronics and Communication Engineers in 1959.

The outline is shown in Figure 3.

The printed wiring board 11 is attached with a float screw 13. The housing 12 has a guide pin 14, and one housing 15 has a guide pin 14 which starts from engagement with the guiding hole 16, and is attached with a float screw 13. Optical connector housing 1 held and fixed to printed wiring board 11 in a floatable state
Correct the position of 2. Next, the optical connectors 17 and 18 begin to engage, and after correcting their mutual positions, precise positional corrections are made inside the optical connectors, and the fitting of the connectors is completed.

In this example, the float screw 1 has the function of floating the optical connector housing and the function of holding and fixing it to the printed wiring board.
3, and the function of guiding the optical connector housing is provided to the guide pin 14, so it is necessary to install two members, the float screw and the guide pin, on the optical connector housing 12, which hinders i-densification. Was.

As an improvement plan for the above, for example, the floating function, holding/fixing function, and guide function as shown in FIG.
A possible solution is to consolidate the components into one component. The present proposal has a structure in which the optical connector housing 12 is held and fixed to the printed wiring board 1 using some kind of stopper member 19 and guide pin 14'.
The guide pin is used to fit the optical connector, and is required to have a high precision of 1i2N degrees. Therefore, in the present invention, there is a problem that the positional precision of the guide pin itself deteriorates.

Furthermore, in order to fix some kind of stopper member 19 to the guide pin, it is necessary to fix the guide pin in some way, and a guide pin structure that can be easily assembled is required.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, as described above, the float screw and the guide pin are constituted by separate members to perform their respective functions, which makes it difficult to increase the density of the connector. Furthermore, in the improved proposal C, the mechanism for installing the guide pin itself, which requires highly accurate assembly dimensions, has not been solved, and there is still work required to stop the guide pin! There was a problem with 1s.

An object of the present invention is to provide a high-density optical connector or optical/electrical composite connector having a mechanism for precisely positioning guide pins and a mechanism for preventing rotation of the guide pins.

[Means to solve the problem]

The above purpose is to utilize a high-precision insert member in the optical connector housing, and also to provide a width across flats part at the front or rear part of the insert member, and to adjust the position of the guide pin that engages with the width across flats part of the housing. This is achieved by providing a width across flats portion.

[Effect]

The insert member provided in the optical connector housing is finished with high precision, and by fitting the guide pin, which is also finished with high precision, into the insert member, the assembled dimensions of the guide pin can be maintained with high precision. can. In addition, the width across flats portion of the front or rear portion of the insert member engages with the width across flats portion of the guide pin, thereby preventing rotation when screwing the guide pin. An example will be explained using FIGS. 1 and 2.

The optical connector housing 12 is held and fixed to the printed wiring board 11 by guide pins 1, and the dimension between the large diameter part 2 of the guide pin and the front surface 3 of the optical connector housing 12 is determined based on the printed wiring board 11 and the housing. By keeping the plate thickness larger than No. 4, the optical connector housing 12 can flow. One housing 15 is a high-precision composite connector on which an 18° optical connector and an electrical connector 5 are mounted.

FIG. 2 shows in detail the structure for mounting the guide pin 1, and the optical connector housing 12 is provided with an insert member 6 finished with high precision, and the structure for mounting the guide pin is constructed. Also, by engaging the width across flats 8 on the front surface of the optical connector housing 12 and the width across flats 9 of the guide pin, the optical connector housing 12 is attached to the printed wiring board 11 with the guide pin 1 and the fixing screw 1o. The function of preventing the guide pin from rotating when holding and fixing can be achieved. It goes without saying that the guide pin rotation prevention function can also be achieved by providing the width across flat parts 8 and 9 on the rear surface 20 of the optical connector housing 12.

〔Effect of the invention〕

According to the present invention, the guide pin is assembled with high precision and has a rotation prevention function, and the optical connector housing is attached to the guide pin and floated.

Since the guide function can be provided and guide pin assembly can be facilitated, a high-density optical connector or an optical/electrical mating connector with good assemblability can be constructed.

Furthermore, since the guide pin and the screw are fastened through the insert member of the optical connector housing, a fastening structure that does not cause screw loosening is achieved.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an optical/electrical composite connector showing an embodiment of the present invention. FIG. 2 is a perspective view of the guide pin mounting structure of the present invention. FIG. 3 is a cross-sectional view of an optical connector explaining the prior art, and FIG. 4 is a cross-sectional view showing an improvement on the prior art. 1...Guide pin 6...Insert member 8.9...Width across flats portion 10...Fixing screw 11...Printed wiring Plate 12... Optical connector housing second

Claims (1)

[Claims] 1. One housing is equipped with an optical connector terminal or an optical and electrical connector terminal and has a pair of holes that engage with guide pins, and is fixed to the printed wiring board, and the other optical connector housing is equipped with an optical connector terminal. and a pair of guide pin mounting holes are provided, and the optical connector housing is held and fixed to another printed wiring board in a floatable state by the guide pins, or a composite connector in which optical and electrical components are mixed. The guide pin mounting hole of the optical connector housing has a precision-machined insert member, a width across flat portion is provided at the front or rear part of the insert member, and the guide pin has a width across flats portion of the optical connector housing. A guide pin mounting structure characterized in that a width across flat portion is provided at a position to engage with a width across flat portion.