JPH11204837A - High-speed optical fiber holder device - Google Patents

Abstract

(57) [Problem] To provide a holder device for a high-speed optical fiber having a device-side holder having a spring property and also having a shielding effect. A transmission / reception device holder section including a transmission / reception device section (light emitting element and light receiving element) of a device side holder is formed of an elastic material, and includes a transmission / reception drive circuit section (drive circuits and 22). The drive circuit holder 20 is formed of a conductive material, and the transmission / reception device holder 10 and the drive circuit holder 20 are, for example, 2
It is formed integrally by color molding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holder device for a high-speed optical fiber used for optical communication corresponding to an ATM (asynchronous transfer mode) requiring high-speed transmission.

[0002]

2. Description of the Related Art In recent years, the development of optical fiber networks has been advanced.
Transmission of signals using an optical fiber as a medium has become widespread.

In the holder structure of the ATM-compatible high-speed optical fiber, the ATM-compatible connector is a PN connector based on JIS standard F07, and a hook is used to fit the fiber cable-side holder and the device-side holder. ing.

FIGS. 5 and 6 show an example of the structure of a conventional holder device. The structure of this holder device is a fiber cable for digital audio (CD, MD), and its transmission rate is used in a low speed range of (（10 Mbps).

That is, the cable-side holder 82 for holding the fiber cable 81 is formed in a rectangular parallelepiped shape, and has an engaging projection (hook) 83 formed on the upper surface thereof. On the other hand, a fitting recess 87 for fitting and holding the cable-side holder 82 is formed in the device-side holder 86 that holds the light-emitting element (including the drive circuit section) 84 and the light-receiving element (including the drive circuit section) 85. This fitting recess 87
Has a structure in which an engagement hole 88 is opened on the upper surface of the.

That is, when the cable-side holder 82 is fitted into the fitting concave portion 87 of the device-side holder 86, the upper surface of the fitting concave portion 87 of the device-side holder 86 is forced by the inclined surface 83a of the engaging projection 83 of the cable-side holder 82. When the cable-side holder 82 is completely fitted into the fitting recess 87 in this state,
The engagement projection 83 fits into the engagement hole 88. At this time, the upper surface of the fitting concave portion 87 returns to its original shape by the elastic restoring force, so that the engaging projection 83 and the engaging hole 88 are securely engaged. FIG. 6 shows this state.

As described above, the structure of the conventional holder device is as follows.
Because of the engagement structure using the engagement projections 83 and the engagement holes 88, the resin material of the device-side holder 86 needs to have a spring property (for example, polycarbonate, ABS, Noryl, etc.).

FIG. 7 shows another example of the structure of a conventional holder device. The structure of the holder device is used for a high-speed fiber cable having a transmission rate exceeding 50 Mbps.

That is, the cable-side holder 92 for holding the fiber cable 91 is formed in a rectangular parallelepiped shape, and fitting projections 93a and 93b are formed on the front surface thereof. On the other hand, the light emitting element 94, the light receiving element 95, and the light emitting element 9
A drive circuit unit (driver IC) 96 for driving the light-receiving element 95 and a device-side holder 98 for holding a drive circuit unit (receiver IC) 97 for driving the light-receiving element 95 include a cable-side holder 9.
Fitting recesses 99a and 99b for fitting and holding the two fitting projections 93a and 93b are formed. In such a structure, the device-side holder 98 is formed of a conductive material containing carbon in order to have a shielding effect against disturbance noise.

[0010]

The structure of the conventional holder device shown in FIGS. 5 and 6 is a digital audio (C).
D, MD), and its transmission rate is used in the low-speed range of (〜１０10 Mbps), so there is no particular problem even if disturbance noise is not considered.

On the other hand, in the case of an ATM-compatible high-speed optical fiber, it is necessary to provide a shielding effect as a measure against disturbance noise for high-speed communication. That is, the device-side holder 86 holding the light emitting element (including the drive circuit unit) 84 and the light receiving element (including the drive circuit unit) 85 needs to be formed of a conductive material having a shielding effect.

However, when the structure of the conventional holder device shown in FIGS. 5 and 6 is applied to an ATM-compatible high-speed optical fiber holder device, the device-side holder 86 is required to have a spring property. Therefore, a conductive material having no spring property cannot be used. That is, there is a problem that a shield effect corresponding to disturbance noise cannot be provided.

Further, in the structure of the holder device for high-speed operation shown in FIG. 7, since the device-side holder 98 needs to be formed of a conductive material, it cannot have a spring property. Therefore, there is a problem that it is necessary to take a complicated hook structure using separate components in order to form a fitting structure using hooks as shown in FIGS. 5 and 6.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a holder device for a high-speed optical fiber which can provide a device-side holder with a spring effect and a shielding effect. To provide.

[0015]

According to a first aspect of the present invention, there is provided a holder for a high-speed optical fiber, comprising a cable-side holder, a transmitting / receiving device, and a transmitting / receiving drive circuit. And a fitting portion including the transmitting and receiving device portion of the device-side holder is formed of an elastic material, and a non-fitting portion including the transmitting and receiving drive circuit portion is formed of a conductive material. Things.

According to a second aspect of the present invention, there is provided the holder device for a high-speed optical fiber according to the first aspect, wherein the fitting portion made of an elastic material and the non-fitting portion made of a conductive material have two. It is formed integrally by color molding.

According to a third aspect of the present invention, there is provided a holder device for a high-speed optical fiber according to the first aspect, wherein an engaging projection is provided on the fitting portion and the engaging portion is provided on the non-fitting portion. An engagement recess for engaging with the mating projection is provided;
Alternatively, an engaging recess is provided in the fitting portion, and an engaging protrusion that engages with the engaging recess is provided in the non-fitting portion, and the engaging protrusion is engaged with the engaging recess. The fitting portion and the non-fitting portion are integrally formed.

According to a fourth aspect of the present invention, there is provided a holder device for a high-speed optical fiber according to the first aspect, wherein the transmitting / receiving device portion of the fitting portion and the transmitting / receiving driving circuit portion of the non-fitting portion are provided. By connecting with a printed wiring board, the fitting portion and the non-fitting portion are integrally formed.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are perspective views showing one embodiment of the structure of the holder device for a high-speed optical fiber according to the present invention.

That is, the cable side holder 1 for holding the fiber cable 2 is formed in a rectangular parallelepiped shape.
An engagement protrusion (hook) 3 is formed on the upper surface.

On the other hand, the device side holder 5 holds the light emitting element 1
A transmission / reception device holder unit 10 for holding the transmission / reception device unit of the light receiving element 1 and the light receiving element 12, a driving circuit unit (drive IC) 21 for driving the light emitting element 11 and a driving circuit unit (receiver IC) 22 for driving the light receiving element 12 are held. The transmission / reception device holder 10 is made of a resilient material having spring properties, and the drive circuit holder 20 is made of a conductive material.

The transmitting / receiving device holder section 10 is formed in a rectangular parallelepiped shape, and a fitting recess 13 for fitting and holding the cable side holder 1 is formed on the front surface facing the cable side holder 1. Further, cylindrical cable insertion portions 14a and 14b for inserting and holding the projecting distal end portions 2a and 2b of the cable 2 held by the cable side holder 1 are formed on the inner inner surface of the fitting concave portion 13 so as to protrude. I have. The upper surface 15 of the fitting recess 13 has an engaging hole 16
Is open.

On the other hand, the drive circuit holder 20 is also formed in a rectangular parallelepiped shape, and
A fitting recess 23 for fitting and holding the rear side of the transmission / reception device holder 10 is formed on the front surface facing 0.

That is, in the device-side holder 5, the rear side of the transmission / reception device holder 10 is the drive circuit holder 20.
Are formed integrally with each other so as to be fitted into the fitting recessed portion 23 of FIG.

Here, as a method of integrally forming the rear side of the transmitting / receiving device holder 10 and the fitting recess 23 of the drive circuit holder 20, the transmitting / receiving device made of an elastic material is used in this embodiment. The holder 10 and the drive circuit holder 20 made of a conductive material are integrally formed by two-color molding.

Next, a procedure for fitting the cable-side holder 1 having the above structure to the device-side holder 5 will be described.

That is, when the cable side holder 1 is fitted into the fitting concave portion 13 of the transmitting / receiving device holder portion 10, the upper surface of the fitting concave portion 13 of the transmitting / receiving device holder portion 10 is formed by the inclined surface 3a of the engaging projection 3 of the cable side holder 1. When the cable-side holder 1 is completely fitted into the fitting recess 13 in this state, the engaging projection 3 is fitted into the engaging hole 16. At this time, since the upper surface 15 of the fitting recess 13 returns to the original shape by the elastic restoring force, the engagement protrusion 3 and the engagement hole 16 are securely engaged. At this time, the protruding tips 2a and 2b of the cable 2 protruding from the front surface of the cable side holder 1.
Are inserted and held in the cable insertion portions 14a and 14b formed in the inner part of the fitting recess 13, and face the light emitting element 11 and the light receiving element 12, respectively. FIG. 2 shows this state.

FIG. 3 shows another embodiment in which the rear side of the transmitting and receiving device holder 10 is integrally formed with the fitting recess 23 of the drive circuit holder 20 in a fitted state.

That is, the engaging projections 19 are respectively provided on the outer sides of the both sides 17, 18 of the transmitting / receiving device holder 10, for example.
a, 19b are formed, and engaging holes 26a, 26b are formed on both side surfaces 24, 25 of the fitting concave portion 23 of the drive circuit holder portion 20 opposed thereto.

That is, when the transmitting / receiving device holder 10 is inserted into the fitting recess 23 of the drive circuit holder 20, both side surfaces 24, 25 of the fitting recess 23 of the drive circuit holder 20 are inserted.
Each engagement protrusion 1 of the transmission / reception device holder 10
9a and 19b are forced to be on the inner side (that is, the fitting recess 1).
3) (that is, both side surfaces 17 and 18 of the transmitting / receiving device holder 10 are elastically deformed). In this state, when the transmitting / receiving device holder 10 is completely inserted into the fitting recess 13, each engaging The projections 19a and 19b are
6a, 26b. At this time, since both side surfaces 17 and 18 of the fitting recess 13 return to the original shape by the elastic restoring force, each of the engaging projections 19a and 19b and each of the engaging holes 26a and 26
b reliably engages. FIG. 4 shows this state (the state where the transmission / reception device holder unit 10 and the drive circuit holder unit 20 are engaged). However, the engagement protrusion 19
a and 19b are formed in the drive circuit holder portion 20, and the engagement holes 2 are formed.
6a and 26b may be formed on the transmitting / receiving device holder 10 side.

Although not shown, the light emitting element 1
1 and the light receiving element 12 and the driving circuit 21 for driving the light emitting element 11 and the driving circuit 22 for driving the light receiving element 12 are connected by a printed wiring board (PWB), so that the transmitting and receiving device holder 10 and the driving circuit are connected. Holder part 2
0 may be integrally formed (that is, fixed by PWB).

[0033]

The holder device for a high-speed optical fiber according to the present invention is a holder device for coupling a cable-side holder and a device-side holder having a transmission / reception device section and a transmission / reception drive circuit section by fitting. The fitting portion including the transmission / reception device portion is formed of an elastic material, and the non-fitting portion including the transmission / reception drive circuit portion is formed of a conductive material. Thus, it is possible to produce a high-speed optical fiber holder device for ATM that has spring elasticity for fitting to the cable side holder and also has a shielding effect against disturbance noise.

In the holder device for a high-speed optical fiber according to the present invention, a fitting portion made of an elastic material and a non-fitting portion made of a conductive material are integrally formed by two-color molding. In the holder device for a high-speed optical fiber according to the present invention, the engaging protrusion is provided on the fitting portion, and the engaging recess is provided on the non-fitting portion to engage with the engaging protrusion, or the engaging recess is provided on the fitting portion. And an engaging projection that engages with the engaging concave portion is provided on the non-fitting portion, and the engaging portion and the non-fitting portion are integrally formed by engaging these engaging protrusions with the engaging concave portion. doing. Further, the high-speed optical fiber holder device of the present invention, by connecting the transmitting and receiving device portion of the fitting portion and the transmitting and receiving drive circuit portion of the non-fitting portion by a printed wiring board,
The fitting portion and the non-fitting portion are integrally formed. Thereby, without taking a complicated hook structure by a separate member,
The fitting portion and the non-fitting portion can be integrally formed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of the structure of a high-speed optical fiber holder device of the present invention.

FIG. 2 is a longitudinal sectional view showing one embodiment of the structure of the high-speed optical fiber holder device of the present invention.

FIG. 3 is an exploded perspective view showing another embodiment of the structure of the high-speed optical fiber holder device of the present invention.

FIG. 4 is a cross-sectional view showing another embodiment of the structure of the high-speed optical fiber holder device of the present invention.

FIG. 5 is an exploded perspective view showing an example of a structure of a holder section of a conventional fiber cable.

FIG. 6 is a cross-sectional view illustrating an example of a structure of a holder section of a conventional fiber cable.

FIG. 7 is an exploded perspective view showing another example of the structure of the holder section of the conventional fiber cable.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable side holder 2 Fiber cable 3 Engagement protrusion (hook) 5 Device side holder 10 Transmitting and receiving device holder part 11 Light emitting element 12 Light receiving element 16 Engagement hole 20 Drive circuit holder part 21 Drive circuit part (drive IC) 22 Drive circuit part (Receiver IC) 23 Fitting recess

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI H04B 10/13 10/12

Claims (4)

[Claims] 1. A holder device for connecting a cable side holder and a device side holder having a transmission / reception device section and a transmission / reception drive circuit section by fitting, wherein a fitting portion of the device side holder including the transmission / reception device section is elastic. A high-speed optical fiber holder device, wherein the non-fitting portion including the transmission / reception drive circuit portion is formed of a conductive material. 2. The high-speed optical fiber holder device according to claim 1, wherein said fitting portion made of an elastic material and said non-fitting portion made of a conductive material are integrally formed by two-color molding. 3. An engaging projection is provided on the fitting portion, and an engaging recess for engaging the engaging projection is provided on the non-fitted portion, or an engaging recess is provided on the fitting portion. An engaging projection that engages with the engaging concave portion is provided on the non-fitting portion, and the engaging portion and the non-fitting portion are formed by engaging these engaging protrusions with the engaging concave portion. 2. The holder device for a high-speed optical fiber according to claim 1, wherein the holder is integrally formed. 4. The connecting part and the non-fitting part are integrally formed by connecting a transmitting / receiving device part of the fitting part and a transmitting / receiving driving circuit part of the non-fitting part by a printed wiring board. The holder device for a high-speed optical fiber according to claim 1, wherein the holder device is provided.