JP3357873B2 - Fiber optic cable and audio or information equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to and between digital audio devices, to an optical fiber cable and audio equipment or information equipment that is used between information devices to media disc or cassette tape.

[0002]

2. Description of the Related Art (Prior Art 1) FIGS. 41 and 4 show a structure of an optical fiber link for transmission between audio devices according to a conventional example 1. FIG.
2 and FIG. 43. In Conventional Example 1, optical semiconductor element 1
A rectangular connector 3 is provided on a holding body 2 for accommodating / holding, and a rectangular plug 4 attached to the tip of an optical fiber shown in FIG. 42 is fitted and held as shown in FIG. Optical transmission is realized by realizing optical coupling with an optical fiber, and the connector cannot connect other than the dedicated rectangular plug 4 attached to the optical fiber. I do not have.

(Conventional Example 2) FIGS. 44 and 45 show the structure of an optical fiber link for transmission between audio devices according to Conventional Example 2. FIG.
Shown in In Conventional Example 2 shown in FIG. 44, a circular connector 7 is provided on a holding body 6 for housing and holding an optical semiconductor element 5,
A round plug 9 attached to the tip of an optical fiber shown in FIG. 45 is fitted and held, and optical transmission is realized by realizing optical coupling between the optical semiconductor element 5 and the optical fiber. An elastic metal plate 8 is provided. The metal plate 8 is not a terminal for external extraction, but is for fitting and holding a round plug 9. Due to the structure of the connector 7, the small single-headed electrical plug 1 shown in FIG.
Although it is possible to insert 0, it is not electrically connected and has no transmission means other than optical transmission.

(Conventional Example 3) FIG. 46 shows Conventional Example 3. Conventional example 3 is a connection device for connecting a plurality of electric systems by fitting a small single-headed electrical plug 10 to a female connection member 10a.

(Conventional Example 4) FIG. 47 shows Conventional Example 4 described in Japanese Utility Model Laid-Open Publication No. Sho 62-193208. The male connection member 11 having the connection protrusion and the female connection member 12 are fitted,
A connection device for connecting a plurality of electric systems, wherein a cable to be connected is composed of a composite cord in which an optical fiber 13 and a plurality of signal transmission lines are put together, and the optical fiber 13 is built into an end of the composite cord. A male connection member 11 provided with a plurality of electric connection terminals 14 is attached. The female connection member 12 has a male connection member 11.
Terminal 15 electrically connected to the electrical connection terminal 14 provided on the optical fiber 13 and the optical semiconductor element 16 optically coupled to the optical fiber 13
Are arranged on the substrate. According to the present technology, it is possible to select both or one of optical transmission and electric signal transmission. However, for sharing with a small single-headed electrical plug,
This is a technique relating to a dedicated connector which is not mentioned in the conventional example 4.

(Conventional Example 5) FIG. 48 shows Conventional Example 5 described in Japanese Patent Application Laid-Open No. 58-111008. The cable connecting the transmitting and receiving modules is composed of a composite cord in which an optical fiber 17 and an electric power supply line 18 are combined, and a plug 19 is attached to an end of the composite cord. The optical module is connected to the power supply terminal 2 electrically connected to the electric power supply line 18 by being fitted to the plug 19.
And an optical semiconductor element optically coupled to the optical fiber 17.

According to the conventional example 5, for example, by connecting the power supply terminal of the receiving module to the power supply device, the transmitting / receiving module can be easily connected from the receiving module to the transmitting module simply by coupling the plug 19 and the composite code. Power can be supplied, and communication by optical transmission can be realized without using an independent power supply for transmission and reception.

In addition, JP-A-57-198419, JP-A-56-17645 and JP-A-61-17645.
JP-A-53706 also discloses an example in which the basic technology is the same as that of the conventional example 4.

[0009]

According to the structure of the optical fiber link according to the conventional examples 1, 2 and 3, for example, three systems for optical transmission, digital and analog electric signal transmission are provided as input / output terminals of digital audio equipment. Required. In this case, a large space is required when the device is incorporated into both audio products and the like, which limits the miniaturization of the device. In addition, for a product having a limited space, it is necessary to select a transmission signal form, which may lack versatility.

Further, according to the connection devices of Conventional Examples 4 and 5,
For example, it is possible to use a single input / output terminal for digital audio equipment, but it requires a dedicated composite cord and plug, and compatibility with cables and plugs currently used for audio equipment connection is not shown. Without
Connection with conventional audio equipment is impossible.

Furthermore, since the function of processing each transmission signal is mixed in the apparatus, a separate switch is required unless the transmission signal form to be used can be recognized. This would require space for it, and increase the number of parts,
Since the number of assembly steps increases, the cost increases.

In view of the above problems, the present invention provides an optical fiber cable and an audio device or an optical device which can ensure optical coupling between an optical fiber plug and an optical semiconductor device.
The purpose is to provide information equipment .

[0013]

An optical fiber cable according to the present invention is provided.
The cable is connected to the insertion part of the electrical plug and the optical fiber plug.
Light with a common insertion hole that can be selectively inserted into the insertion part
Light including optical fiber plugs used for power transmission equipment
In a fiber cable, the optical fiber plug
The insertion portion of the front end portion engages in the photoelectric sharing transmission device.
A metal body that engages with the body, and a photoelectric sharing transmission device at the base
To prevent short circuit between multiple electric signal transmission terminals
It is characterized by being an insulating part.

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

According to the present invention, the insertion tip portion is connected to the photoelectric
Because it was a metal body that engages with the engagement body in the shared transmission device ,
Even if insertion and removal are repeated, sufficient strength is ensured, and optical coupling between the optical fiber plug and the shared optical transmission device can be ensured. In addition, the base of the
Short circuit between multiple electrical signal transmission terminals in the transmitter
Since the insulating portion is used as a stop, a short circuit between the terminals of the shared optical transmission device can be prevented.

Also, the optical fiber cable of the present invention
An electric plug having an electric signal transmission terminal for transmitting an electric signal connected to the constricted electrode portion of the electric plug
Insertion section of optical fiber plug
In an optical fiber cable including an optical fiber plug used for an optical / electrical transmission device having a common insertion hole capable of being inserted , the optical fiber plug has a metal body at a portion that comes into contact with the electric signal transmission terminal upon insertion, and is inserted. For the other electric signal transmission other than the electric signal transmission terminal
A portion in contact with the terminal is an insulating portion for preventing short circuit .

According to the present invention, the portion of the electrical plug that is in contact with the electrical signal transmitting terminal for electrical transmission connected to the constricted electrode portion of the electrical plug when the optical fiber plug is inserted is made of a metal body. Because the electrode portion where the constriction of the electric plug is formed is near the tip of the plug,
When the optical fiber plug is inserted, it comes into contact in the vicinity of the plug tip, and even if insertion and extraction are repeated, sufficient strength is ensured, and optical coupling between the optical fiber plug and the shared optical transmission device can be ensured. . Furthermore, the other electrical signal transmitting terminals other than the electrical signal transmitting terminal are in contact with each other.
Since the touching portion is an insulating portion for preventing short-circuit, it is possible to prevent short-circuit between terminals of the shared optical transmission device.

The device of the present invention is an audio device or information device provided with any one of the above optical fiber cables.

According to the invention, Ru can the optical coupling between the fiber and the photoelectric shared transmission device securely audio
A device or information device is obtained.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A shared optical transmission apparatus according to a first embodiment of the present invention, as shown in FIGS.
The optical system and the electric system can be selectively applied, and an optical semiconductor element 22 for transmitting and receiving light to and from an optical fiber cable for optical transmission, and a small single-headed electric plug 23 for electric transmission (see FIG. 6). ), A plurality of electrical connection terminals 24 for performing electrical exchange, an optical semiconductor element 22 and a holder 25 for housing and holding the electrical connection terminals 24, and the optical semiconductor element 22 and an external circuit are connected. The holder 25
And an external connector 26 disposed on the outer peripheral surface of the optical fiber cable, and the optical fiber plug 27 or the electric plug 23 of the optical fiber cable is selectively connected.

Here, as shown in FIG. 5, the optical fiber plug 27 of the optical fiber cable has a shape similar to the existing small single-headed electrical plug 23 which is generally distributed. That is, a single head 31 is formed at the tip of the optical fiber plug 27, and a constriction 32 is formed on the base side of the single head 31, and an electric plug having a single head 33 and a constriction 34 as shown in FIG. 23 has a similar appearance.

As shown in FIG.
A general one in which an optical semiconductor chip 22a such as an ED or a phototransistor is sealed with a translucent resin 22b is used. An external connector 26 for electrically connecting the optical semiconductor chip 22a to an external circuit is drawn out from the lower surface of the optical semiconductor element 22.

The holding body 25 is formed by molding using a non-translucent resin. The electric connection terminals 24 are integrally formed, and the optical semiconductor element 22 is fixed and housed by an adhesive resin. A common cylindrical insertion hole 36 for selectively inserting the plugs 23 and 27 is formed from one end surface (front surface) of the holder 25 to the mounting position of the optical semiconductor element 22.

Here, the depth L of the insertion hole 36 shown in FIG.
1, that is, the distance L1 from one end surface (front surface) of the holder 25 to the mounting position of the optical semiconductor element 22 is given by L1 = L2 + α (mm) (1) In the expression, L2 is the insertion portion 3 inserted into the insertion hole 36 of the optical fiber plug 27 as shown in FIG.
8a, and is given by, for example, L2 = 14.6 + β (mm) (2) Α ≒ 0.2 mm, 0 mm <β <2
mm is desirable.

As shown in FIG. 6, the length L3 of the insertion portion 38b inserted into the insertion hole 36 of the small single-headed electrical plug 23
Is given by, for example, L3 = 14.0 ± γ (mm) (3) Here, γ ≒ 0.6 mm. Therefore, L1>L2> L3 (4) is always satisfied. With this setting, each plug 2
3 and 27 can be prevented from contacting and damaging the optical semiconductor element 22, and the optical fiber plug 27 can be prevented from being damaged by bringing the optical fiber plug 27 closer to the optical semiconductor element 22 than the electrical plug 23. The optical coupling can be ensured, and the optical characteristics can be improved.

As shown in FIGS. 2 and 3, a plurality of grooves 36a are provided on the inner peripheral surface of the insertion hole 36 at positions symmetric with respect to the hole axis. And the groove 36a
The electrical connection terminal 24 is disposed at the center.

As the electric connection terminals 24, metal plates 24a to 24d which are electrically independent from each other are used. Each of the metal plates 24a to 24d is made of an elastic phosphor bronze or the like.
It has a g-plated finish and a plate thickness of, for example, 0.25 mm.

Among them , the metal plate 24 as a contact body
The plugs a, 24c, and 24d protrude inward from the inner periphery of the insertion hole 36 so as to be able to contact the outer peripheral surfaces of the plugs 23, 27.

The metal plate 24b (engaging member) is inserted into the plugs 23, 2 when the plugs 23, 27 are completely inserted.
At the position where it engages with the constrictions 32, 34 of the single heads 31, 33, it protrudes inward from the inner periphery of the insertion hole 36.

Further, respective metal plates 24a~24d, in order to allow the disengagement of each plug 23 and 27, towards the outside of the insertion holes 36 that are elastically deformable.

In FIGS. 2 to 4, reference numeral 39a denotes a back cover fitted and fixed from the back side of the holding body 25, and 39b denotes a boss portion for positioning the back cover to be mounted on an external mounting board (PWB). In FIG. 6, reference numerals 23a to 23d denote electrode portions of the electric plug 23, and the respective metal plates 24a to 24d of the electric connection terminal 24.
24d.

A method of using the shared optical transmission device having the above configuration will be described. First, when performing optical transmission through an optical fiber, the optical fiber plug 27 shown in FIG.
Into the insertion hole 36. At this time, the outer peripheral surface of the optical fiber plug 27 is
a, 24d, and 24c while pushing outward. Further, the single head 31 of the optical fiber plug 27 is
Proceed while pushing b outward. The constriction 32 of the optical fiber plug 27 and the metal plate 2 of the electrical connection terminal 24
At the time when the optical fiber plug 4b comes into contact with and meshes with the optical fiber 4b, the torque acting on the optical fiber plug 27 becomes substantially zero, and the optical fiber plug 27 is completely fitted. Then, the distance between the front end surface of the optical fiber plug 27 and the front surface of the optical semiconductor element 22 is calculated from the above-described equation (1).
α (≒ 0.2 mm). This distance is suitable for efficiently stabilizing the optical coupling between the optical fiber plug 27 and the optical semiconductor element 22, so that the optical characteristics are improved.

When removing the optical fiber plug 27, the metal plate 24b
Is pushed outward at the single head 31 of the plug 27,
In the process of being pulled out as it is, the engagement with the constriction 32 of the optical fiber plug 27 is released, so that the optical fiber plug 27 can be easily removed.

Next, when electric transmission is performed through the electric plug 23, the small single-headed electric plug 23 shown in FIG. The insertion procedure is the same as that for the optical fiber plug 27 described above. When the electric plug 23 is completely inserted, the metal plates 24 a to 24
24d and the electrode portions 23a to 23d of the electric plug 23 are electrically connected to each other, so that an external electric signal can be extracted. At this time, the distance between the front end surface of the electric plug 23 and the front surface of the optical semiconductor element 22 is given by the following equations (1), (2), and (3).
Since it is at least (α + β) mm, it is possible to prevent the optical system of the optical semiconductor element 22 from being damaged by the electric plug 23.

The external shape of the holding member of the present embodiment is as follows.
There is no problem in the size of the conventional electrical connection device, which is sufficient to add a portion capable of holding the optical semiconductor element. Since the optical fiber plug 27 also usually has a diameter of 3.5 mm, both the conventional electrical connection device and the optical transmission device are used. Smaller than the total size of In addition, since the single photoelectric sharing transmission device of the present embodiment can perform both photoelectric transmission, the number of components can be reduced, and the cost can be reduced.

[0045] Second Embodiment of a second embodiment of the present invention
The photoelectric sharing transmission device is used for, for example, signal input / output of audio equipment, and performs three-system transmission of an optical signal, a digital electric signal, and an analog electric signal. That is, when used for an output system, as shown in FIG. 7A, an analog electric signal output for a line-out or a headphone, a digital electric signal output by a coaxial cable,
The three types of digital optical signal output are performed by the same photoelectric sharing transmission device. When used for the input system of audio equipment, there are three types of inputs: an analog electric signal input such as a line-in or a microphone, a digital electric signal input of a coaxial cable, and a digital optical input, as shown in FIG. Are performed by the same photoelectric sharing transmission device. As shown in FIGS. 8 to 16, the transmission system of the present embodiment uses an optical transmission method for the plugs 23, 27, and 45 inserted into the insertion holes 36 of the holder 25. A method identification means 41 for identifying whether the method is an electric method or an analog electric method, and an insertion identification means 42 for identifying whether any of the plugs 23, 27, 45 has been inserted into the insertion hole 36. Are provided.

The system identification means 41 is provided in FIG.
6, an insulation identification pattern (insulation portion) 43 for an optical fiber in which an insulating material such as a synthetic resin is formed on the outer periphery of the optical fiber plug 27, and a small single-head type for transmitting a triode analog electric signal An insulating identification pattern (insulating portion) 44 for an analog electric plug in which an insulating material such as a synthetic resin is formed on the outer peripheral portion of the electric plug 23, and an insulating material such as a synthetic resin is formed on the outer peripheral portion of the digital electric plug 45. A digital electrical plug insulation identification pattern (insulation portion) 46;
And an identification terminal 47 arranged in the insertion hole 36 of the holder 25.

The electrical connection terminal 24 and the identification terminal 4
7 are plugs 23, 27, as shown in FIGS.
When the plug 45 is inserted into the insertion hole 36, each plug 23, 2
7 and 45 are arranged at positions where they can come into contact with the outer peripheral surface. Then, as shown in FIG. 12, FIG. 14 and FIG. 16, the patterns of the respective insulation identification patterns 43 and 44 are determined based on the combination of the results of the electrical connection between the electrical connection terminal 24 and the identification terminal 47. The transmission system is configured to be identifiable. This will be described in detail for each plug.

First, in the structure of the analog electrical plug 23, as shown in FIG. 13, a sleeve portion 23a as a grounding electrode portion and a chip portion 23 as a signal electrode portion.
b, The ring portion 23c as a signal electrode portion and the ring portion 23d as a grounding electrode portion come into contact with each of the metal plates 24a to 24d of the electric connection terminal 24, and perform electric signal transmission in each signal form. Further, each of the electrode portions 23b,
In order to make 23c and 23d electrically independent electrodes,
Insulating portions 52 and 53 are formed. However, unlike the four-pole analog electrical plug shown in FIG. 6, the three-pole analog electrical plug is different from the sleeve part 23a and the ring part 23d.
An insulating portion is omitted between the two, and electrical conduction between them is ensured. The insulating portions 52 and 53 constitute the analog electrical plug insulation identification pattern 44.

The optical fiber plug 27 is
The metal body has a shape similar to that of a small single-headed electrical plug, and can be inserted into and removed from the insertion hole 36 of the holder 25 as shown in FIG. The optical fiber plug 27 has an optical fiber cable inside, and transmits and receives light to and from the optical semiconductor element 22 in the holder 25. The optical fiber plug 27
In the light transmission function, there is no need for a terminal to be an electrical contact. However, since it is necessary to contact the identification terminal 47 with the outer peripheral surface to identify the transmission method, The metal body 57 is exposed to make a part of the surface conductive. That is, as the insulating identification pattern 43 for the optical fiber, portions corresponding to the sleeve portion 23a, the ring portion 23d, and the insulating portion 52 in the analog electrical plug 23 are covered with the insulating portion 56 made of synthetic resin. Further, a portion corresponding to the tip portion 23b, the ring portion 23c, and the insulating portion 53 in the analog electrical plug 23 has the metal body 57 exposed and is an electrode portion dedicated to identification. With such a configuration, the optical fiber insulation identification pattern 43 is formed.

Further, the shape of the small single-headed electrical plug 45 for transmitting digital signals is
3 but with the exception of the sleeve 23a
Is provided with an insulating portion 59 for identifying a digital electric plug.

As described above, each of the plugs 23, 27, 45
By changing the position and width of each identification insulating part without affecting each transmission, each insulation identification pattern 43, 44, and 46 is different, so that each transmission system can be identified.

The metal plates 24b, 2 of the electric connection terminals 24
4c and 24d are electric signal transmission terminals similar to those of the first embodiment. As shown in FIGS. 8 and 9, the metal plate 24b is disposed at a position where the metal plate 24b can come into contact with the chip portion 23b of the electric plugs 23 and 45 and the metal body 57 of the optical fiber plug 27. The metal plate 24c is disposed at a position where the metal plate 24c can contact the ring portion 23c of the electric plugs 23 and 45 and the metal body 57 of the optical fiber plug 27. The metal plate 24d is, as shown in FIGS.
It is arranged at a position where it can come into contact with the insulating portion 56 of the 3d or optical fiber plug 27.

The identification terminal 47 is composed of metal plates 61 and 62 having the same or similar shape as the metal plates 24b, 24c and 24d of the electric connection terminal 24. Among these, the metal plate 61 is a sleeve portion 2 of the electric plug 23.
3a, it is arranged at a position where it can contact the insulating part 59 of the electric plug 45 and the insulating part 56 of the optical fiber plug 27.
The metal plate 62 is connected to the ring 2 of the electric plugs 23 and 45.
It is arranged at a position where it can come into contact with the insulating portion 56 of the 3d or optical fiber plug 27.

The insertion identifying means 42 includes an insertion identifying terminal 6
3 (metal plate), which is arranged at a position where it can come into contact with the ring portion 23 c of the electric plugs 23 and 45 and the metal body 57 of the optical fiber plug 27.

In the above configuration, first, the plugs 23, 2
When any one of 7, 7 is inserted into the insertion hole 36, FIG.
2. As shown in FIGS. 14 and 16, the metal plate 24c and the insertion identifying terminal 63 are in contact with the ring portion 23c of the plug or the metal body 57.

Here, the ring portion 23c or the metal body 57
Is a region having no insulating portion, so that if any of the plugs 23, 27, and 45 is inserted,
Electrical conduction between the metal plate 24c and the insertion identification terminal 63 is ensured via the conductive outer peripheral surfaces 27 and 45.
Thereby, the presence or absence of any of the plugs 23, 27, and 45 can be determined.

Next, the type of each of the plugs 23, 27 and 45 is identified. Here, the metal plate 24d and the metal plate 6
Each plug is recognized based on the result of the electrical continuity between 1 and 62.

That is, when the optical fiber plug 27 is inserted, as shown in FIG.
62 are insulated from the metal plate 24d and the metal plate 61 and between the metal plate 24d and the metal plate 62, respectively, so that conduction is impossible.

When the analog electric plug 23 is inserted, as shown in FIG. 14, the metal plate 24d and the metal plates 61 and 62 come into contact with the sleeve portion 23a and the ring portion 23d of the small single-head type electric plug 23, respectively. Plate 24d and metal plate 61
And between the metal plate 24d and the metal plate 62 can be electrically connected to the electrode portions 23a and 23d of the electric plug 23, respectively.

When the digital electric plug 45 is inserted, as shown in FIG. 16, the metal plate 24d and the metal plate 62 can be electrically connected to each other via the ring 23d of the single-headed electric plug. However, since the metal plate 61 is in contact with the insulating portion 59, the metal plate 24d and the metal plate 61 are insulated and cannot conduct.

The combination of the above-described continuity and non-conduction enables identification of each plug type of the shared optical transmission device. As described above, the plugs 23, 27, and 45 can be automatically identified by the system identification means 41. However, before insertion into the insertion hole 36, the insulation identification patterns 43, 4
Needless to say, 4,46 can be visually identified.

[Third Embodiment] In the above-described second embodiment, the function of identifying the presence / absence of plug insertion and the transmission method is provided.
As shown in FIG. 12, when the cable 7 is inserted, the two metal plates 24b and 24c are short-circuited through the metal body 57 of the optical fiber plug 27, which may cause an electrical trouble depending on an external circuit. There is. Similarly, the electrically independent metal plate 24c and the insertion identification terminal 63 may be short-circuited through the metal body 57 of the optical fiber plug 27 as shown in FIG. Then, various electric troubles such as giving noise from the insertion identification terminal 63 side to the metal plate 24c side, breakage or runaway of a digital circuit such as a microcomputer externally connected to the insertion identification terminal 63, etc., occur. May occur. Therefore, in the present embodiment, an electrical trouble is prevented by preventing short circuit between different electrical connection terminals, and
By contacting the terminal as the insertion identifying means 42 without interposing the outer peripheral surface of the plug, damage to the external digital circuit
This is to prevent runaway.

The photoelectric sharing transmission apparatus of this embodiment is similar to that of FIG.
The optical fiber plug 27, the three-pole analog electrical plug 23 of FIG. 24, and the digital electrical plug 45 of FIG. 15 are selectively used. As shown in FIGS. It is premised that a plurality of pairs are formed by providing the same number of the terminals 47 two by two and corresponding to each other one-to-one. This is the same as the second embodiment except that each terminal 2
At least some of the arrangements of the plugs 23 and 27 are arranged such that the terminals 24 and 47 of the different pairs do not short-circuit through the outer peripheral surfaces of the plugs 23 and 27. It is misaligned.

This will be described in detail. As shown in FIG. 22, when the optical fiber plug 27 is used, the metal plate 24b and the metal plate 24c become terminals for analog output. Here, the insulating portion 56 of the optical fiber plug 27 is designed to extend to a position between the metal plate 24b and the metal plate 24c. Then, the metal plate 24b and the metal plate 24c do not short-circuit through the metal body 57 of the optical fiber plug 27, and electrical trouble can be prevented.

Also, the insertion identifying means 42 has a different configuration from the second embodiment. That is, the insertion identification means 42 includes an outer terminal 71 disposed at a position where the insertion plug 36 is not in contact with the used plug 23, 27, 45 in the insertion hole 36 of the holder 25, and an inner terminal 72 disposed inside the outer terminal 71. Are used.

Here, the electric connection terminals 24 and the like are
While the outer terminals 71 are arranged to be shifted in the outer circumferential direction from the electrical connection terminals 24, the outer circumferential surfaces of the plugs 23, 27, 45 And does not directly contact the

The outer terminal 71 is connected to the other metal plates 24b, 2
4c, 61 and 62 do not require elasticity. Also,
It is also necessary to improve and maintain reliability such as durability as mechanical contacts. In consideration of these things, in the present embodiment,
As a material of the external terminal 71, a material obtained by plating a berylim copper with Ag is used, and its thickness is set to 0.2 mm. On the other hand, the other metal plates 24b, 24c, 61, 6
As in the first embodiment, phosphor bronze or the like subjected to an Ag plating finish is used as in the first embodiment.
mm.

The inner terminal 72 is connected to another metal plate 24b,
As in the case of 24c, 61, and 62, an elastic phosphor bronze or the like which is subjected to Ag plating is used, the plate thickness is 0.25 mm, and the fixing portion 72a fixed to the lower portion of the holder 25 is used. And a movable portion 72b which is bent from the one end of the fixed portion 72a so as to be elastically deformable and extends. Here, the plugs 23, 27, 45 are inserted into the movable portion 72b when the plug is inserted in a natural state.
A projection 72c is formed to abut the contact. When the plug is inserted, the movable portion 72b is
A contact position S1 (see FIGS. 21 and 22) that is pressed against the outer terminal 71 by being pressed by the outer terminal 71 and a non-contact position S2 (see FIG. 17 and FIG. 21).

As described above, by using the mechanical contacts as the insertion identifying means 42, it is possible to determine whether or not plug insertion is possible without providing a metal plate at a position facing the metal plate 24c as shown in FIG. Therefore, the metal plate 24b and the metal plate 2
4c can be prevented, and when a signal is given to one of the metal plates 24b, 24c from an external digital circuit or the like, noise can be prevented from being generated in the other metal plate 22b, 24c. Thus, each metal plate 24b, 24
By devising the arrangement of c, 61, 62 and the respective regions of the insulating portion 56 of the optical fiber plug 27 and the metal body 57, a structure in which the output terminals of the shared optical transmission device are not short-circuited becomes possible.

[Fourth Embodiment] A plug-jack type photoelectric sharing transmission apparatus according to a fourth embodiment of the present invention employs three systems of an optical system, a digital electric system, and an analog electric system as shown in FIGS. This embodiment is similar to the above embodiments in that it can be selected.
A system identification means 41 for identifying which type of plug is inserted into the insertion hole, and an insertion identification means 42 for identifying whether or not any plug is inserted into the insertion hole 36 are provided. As in the second and third embodiments, the electric connection terminal 24 and the identification terminal 47
Although the same arrangement as that of the third embodiment is adopted for the third embodiment, the present embodiment is different from the above embodiments in the current path for checking the electrical continuity of the terminals 24 and 47.

That is, in the photoelectric sharing transmission apparatus of this embodiment, as shown in FIG. 30, the inner terminal 72 of the insertion identifying means 42 is grounded to the ground (GND) as a ground terminal.
The metal plates 61 and 62 and the outer terminal 71 are connected to a constant voltage power supply Vref via resistance elements (pull-up resistors) 81, 82 and 83, respectively. Thus, while the inner terminal 72 is in contact with the outer terminal 71, the outer terminal 71 is short-circuited to the ground, so that the potential (output) V71 of the outer terminal 71 is low. Is in non-contact, the potential (output) V of the outer terminal 71
71 goes high. The inner terminal 72 is connected to the electric plug 2.
While the metal plate 62 is in contact with the ring portions 23d of the electrical plugs 23 and 45 while the metal plate 62 is in contact with the ring portions 23d of the electric plugs 23 and 45, the potential V62 is low because the metal plate 62 is short-circuited to the ground. When the terminal 72 or the metal plate 62 comes into a non-contact state with the ring portion 23d of the electric plugs 23 and 45, the potential V62 of the metal plate 62 becomes high. Similarly, while the inner terminal 72 is in contact with the ring portion 23d of the electric plug 23 and the metal plate 61 is in contact with the sleeve portion 23a of the electric plug 23, the metal plate 61 is short-circuited to the ground, so that the potential V61 is low. Where the inner terminal 72 is
d, or when the metal plate 61 comes into non-contact with the sleeve 23a of the electrical plug 23, the metal plate 6
The potential V61 of 1 becomes high.

The other structure is the same as that of each of the above embodiments. For example, the shape of each of the plugs 23, 27 and 45 is formed to have a single head and a constriction as in the first embodiment. . Further, the depth L1 of the insertion hole 36, the length L2 of the insertion portion to be inserted into the insertion hole 36 of the optical fiber plug 27, the insertion hole 36 of the small single-head plug 23 or the plug 45 having a shape similar thereto. The relationship with the length L3 of the insertion portion to be inserted into L1>L2>L1>L2> as in the first embodiment.
L3.

FIG. 31 shows plugs 23, 27, and 45.
FIG. 31 shows potentials V71, V62, V61 of the outer terminal 71 and the metal plates 61, 62 with respect to the types of FIG.
“H” in the middle indicates a high state, and “L” indicates a low state.

First, when the analog electrical plug 23 is inserted, the inner terminal 72 is pushed by the plug 23 and comes into contact with the outer terminal 71, and the outer terminal 71 is short-circuited to the ground. Go low. Further, since the metal plate 62 contacts the ring portion 23d of the electric plug 23, the metal plate 62 is short-circuited to the ground via the ring portion 23d of the electric plug 23 and the inner terminal 72, and the potential V62
Goes low. Further, since the ring portion 23d of the plug 23 and the sleeve portion 23a are continuous as a metal portion, the metal plate 61 is short-circuited to ground via the sleeve portion 23a, the ring portion 23d and the inner terminal 72 of the electric plug 23, and the potential V61 Goes low. That is, all potentials V71, V62, V of the outer terminal 71 and the metal plates 61, 62
61 goes low.

Next, when the digital electric plug 45 is inserted, the outer terminal 71 and the inner terminal 72 are electrically connected in the same manner as the analog electric plug 23.
The metal plate 62 and the inner terminal 72 are electrically connected via the ring portion 23d of the plug 45. However, since the portion corresponding to the sleeve portion 23a of the analog electrical plug 23 is the insulating portion 59, The metal plate 61 and the inner terminal 72 are not electrically connected. Therefore, the potentials V71 and V62 of the outer terminal 71 and the metal plate 62 become low,
The potential V61 of the metal plate 61 becomes high.

When the optical fiber plug 27 is inserted, the ring 23 d of the analog electrical plug 23 is
Since the portion corresponding to the sleeve portion 23a is the insulating portion 56, only the outer terminal 71 is electrically connected to the inner terminal 72. That is, only the potential V71 of the outer terminal 71 becomes low, and the metal plate 61, the metal plate 62
Potentials V61 and V62 become high.

Then, any of the plugs 23, 27, 45
Is not inserted, the inner terminal 72 is
The metal plate 61, the outer terminal 71, and the metal plate 62 are not all connected to the ground because they do not come into contact with each other.
1, V62 and V61 are all high.

As described above, by detecting the potentials V61, V62, V71 of the metal plate 61, the metal plate 62 and the outer terminal 71, the types of the inserted plugs 23, 27, 45 and the presence / absence of plug insertion are identified. be able to. This identification may be performed by an external circuit such as a microcomputer of the mounting board.

When a voltage is applied to the sleeve portion 23a and the ring portion 23d of the electric plugs 23 and 45, an electric signal other than the original signal input to and output from the plugs 23 and 45 is input. Then, noise is mixed into the original signal. However, in the present embodiment, since the inner terminals 72 are grounded, the plugs 23, 27, and 45 can be connected with a small amount of current.
Type and the presence or absence of plug insertion can be identified. In this case, it is not necessary to apply a high voltage to the metal plate 61, the outer terminal 71, and the metal plate 62.
Noise of the plugs 23, 27, and 45 generated by applying a high voltage to 7, 45 can be reduced.

[0080] According to Fifth Embodiment] The structure of I that photoelectric shared transmission apparatus in the first embodiment to the fourth embodiment, FIG. 1
4, FIG. 8 to FIG. 10, and FIG. 17 to FIG. 21, a holding body 25 containing a plurality of metal plates 24a to 24d connected to a small single-headed electrical plug for electric transmission and performing electric exchange. The optical semiconductor element 22 for transmitting and receiving light to and from the optical fiber cable for optical transmission is stored and held. The external connector 26 is bent once before reaching the bottom surface of the holding body 25 and is bent. They are arranged on the same plane. For this reason, the height from the mounting substrate 84 of the shared optical transmission device is the height of the light-transmitting resin 22b of the optical semiconductor element 22 and the height of the light-transmitting resin 22 of the external connector 26.
b is determined by the sum of the distance from the bottom surface to the bending position. Then, the reduction in height is prevented by the distance from the bottom surface of the translucent resin 22b to the bending position.

Therefore, as shown in FIGS. 32 and 33, a proposal example in which the external connector 26 is arranged perpendicular to the bottom surface of the holder 25 and inserted directly into the mounting board 84 is also conceivable. However, in the proposal example shown in FIGS. 32 and 33, the height from the mounting substrate 84 of the shared optical transmission device is higher than the height of the light-transmitting resin 22b of the optical semiconductor element 22 and the bottom of the light-transmitting resin 22b. It is determined by the total of the external connector 26 and the distance to the tie bar uncut portion 26b. Therefore, it has become a limiting factor when further height reduction is desired. The shared optical transmission device of the present embodiment is configured so as not to be restricted by the height of the translucent resin 22b in order to enable a reduction in height.

That is, as shown in FIGS. 34 and 35, the shared optical transmission device of this embodiment has a drawing surface (bottom surface) 85 from which the external connector 26 of the optical semiconductor element 22 is drawn.
Is the end face (bottom face) 8 of the holder 25 in contact with the mounting board 84.
6 and the external connector 2
6 is a drawer 87 drawn out perpendicular to the end face 86 of the holder 25, and a bent part 88 bent from the tip of the drawer 87 parallel to the end face 86 of the holder 25. The drawing dimension T1 of the drawing section 87 is set substantially equal to the thickness dimension T2 of the mounting board 84. That is, the external connector 26 is configured so that the lead-out portion 87 penetrates through the mounting substrate 84 and the tip of the bent portion 88 is pulled out from the back surface of the mounting substrate 84 in the lateral direction. For this reason, the mounting board 84 includes the metal plate 2
Not only a through hole 91 for an electric connection terminal passing through 4a to 24d, 61, and 62 but also a through hole 92 for a connector passing through the external connector 26 is used.

In the above configuration, when mounting on the mounting board 84, first, as shown in FIGS. 36 and 37, the bent portion 88 of the external connector 26 is first inserted into the connector through hole 9 of the mounting board 84.
Insert into 2. Then, when the drawer 87 is inserted into the connector through hole 92, the holding body 25 is pushed down while rotating downward. Then, while inserting the drawer portion 87 into the connector through hole 92 as it is, the metal plate 2
4a to 24d are inserted into the through holes 91 for electric connection terminals.
Thereafter, the metal plates 24a to 24d may be connected to a printed wiring circuit (not shown) on the back surface of the mounting board 84 by soldering or the like.

When the extraction surface 85 of the optical semiconductor element 22 and the bottom surface 86 of the holder 25 are arranged on substantially the same plane, the extraction surface 85 of the optical semiconductor element 22 comes into contact with the surface of the mounting substrate 84. And the optical semiconductor element 22 and the mounting substrate 84 as in the first to fourth embodiments.
Can be prevented from being generated. Therefore,
The height of the optical semiconductor element 22 from the front (upper) surface of the mounting substrate 84 can be reduced by the length of the lead-out portion 87, and therefore, the holder 25
, The height of the shared optical transmission device can be reduced, and in particular, the portable device can be made thinner.

The present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention.

For example, in the first embodiment, the distance between the front end surface of the optical fiber plug 27 and the front surface of the optical semiconductor element 22 is set to about 0.2 mm.
Within these ranges, the optical characteristics of the two can be favorably maintained.

In the first embodiment, the analog electrical plug 23 has been described by taking a four-pole type as an example, but may be applied to a three-pole type or a two-pole type, for example. Conversely, in the second embodiment and the third embodiment,
Although the three-pole type is described as an example of the analog electrical plug 23, the invention may be applied to, for example, a four-pole type or a two-pole type.

Further, as shown in FIGS. 38 and 39, in order to be able to cope with solder reflow, the direction of taking out the metal plate from the holding body may be changed in consideration of the material of the optical semiconductor element and the like. .

Further, the inner terminal 72 of the third embodiment and the fourth embodiment uses a bent piece having elasticity. For example, the outer terminal 71 is disposed above the holder 25 and May be arranged at the upper part of the insertion hole 36 so as to be detachable from the outer terminal 71, and may be brought into contact with the plugs 23, 27, 45 by the weight of the inner terminal 72.

The resistance element 8 used in the fourth embodiment
1, 82 and 83 use ordinary resistors, but instead may use semiconductor elements such as diodes or capacitors or the like.

Further, in the fourth embodiment, the outer terminal 71
And one end of a constant voltage power supply Vref
Are connected to the pull-up resistors 81, 82, and 83, but instead of the pull-up resistors 81, 82, and 83, as shown in FIG.
The constant current power supply Ai is connected to the first and second terminals 62 and the outer terminals 71, and the resistance elements 81, 82 and 83 are connected to the connection intermediate points between the constant current power supply Ai and the respective metal plates 61 and 62 and the outer terminals 71. Good. In this case, the inner terminal 72 is
When the outer terminal 71 is short-circuited to the ground, current does not flow through the resistance element 81 while the outer terminal 71 is short-circuited to the ground. , 62 are short-circuited to the ground, so that no current flows through the resistance elements 82, 83. On the other hand, when the inner terminal 72 is not in contact with the outer terminal 71, the current from the constant current power supply Ai flows to the pull-up resistor 81 side.
Also, even if the inner terminal 72 is in contact with the outer terminal 71,
When there is no conduction between the outer terminal 71 and the metal plates 62, 61, current flows through the resistance elements 82, 83. in this way,
By detecting whether or not a current flows through each of the resistance elements 81, 82, and 83, the inserted plugs 23, 27, and 4 are detected.
5 and the presence or absence of plug insertion can be identified.

[0092]

According to the optical fiber cable of the present invention,
For example, the insertion part of the electrical plug and the insertion part of the optical fiber plug
With a common insertion hole that can be selectively inserted
Optical fiber including optical fiber plugs used for transmission equipment
In a bar cable, insertion of the optical fiber plug
The part is configured such that a tip end portion is engaged with an engaging body in the shared optical transmission device.
Even if insertion and removal are repeated,
Ensuring sufficient strength, shared with optical fiber plug and photoelectric
Optical coupling with the transmission device can be ensured. further,
The root portion is transmitted to multiple electrical signal transmissions in the shared optical transmission equipment.
Insulation to prevent short circuit between terminals
It is possible to prevent short-circuits between terminals of
Wear. According to the optical fiber cable of the present invention,
The electric plug is connected to the constricted electrode
Optical fiber with electrical signal transmission terminal for air signal transmission
Plug or electrical plug that can be selectively inserted.
Optical fiber including optical fiber plugs used for
In the fiber cable, the optical fiber plug is
The part that comes into contact with the electric signal transmission terminal when inserted
The electrode part where the constriction of the electric plug was formed
Is near the tip of the plug.
When the lug is inserted, it will come into contact near the plug tip.
Even if insertion and removal are repeated, ensure sufficient strength
Between the optical fiber plug and the shared optical transmission device.
Chemical connection can be ensured. Further, the other electric signal transmission
The part that contacts the connection terminal is a short-circuit prevention insulation part.
Therefore, short circuit between terminals of the shared optical transmission device is prevented.
be able to. In addition, the audio equipment or information of the present invention.
According to the information equipment, any of the above optical fiber cables
Equipment with optical fiber and optical shared transmission
Audio equipment that can ensure optical coupling with equipment
Or an information device is obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a shared optical transmission device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1 from which an internal mechanism is omitted.

FIG. 3 is a sectional view taken along line BB of FIG. 1 from which the internal mechanism is omitted.

FIG. 4 is a cross-sectional view taken along line CC of FIG. 1 from which an internal mechanism is omitted.

FIG. 5 is a view showing an optical fiber plug according to the first embodiment of the present invention.

FIG. 6 is a diagram showing a four-pole analog electrical plug.

7A and 7B are diagrams showing a shared optical transmission device and a plug according to a second embodiment of the present invention, wherein FIG. 7A shows a case where a shared optical transmission device is used as an output system, and FIG. It is a figure showing the case where a photoelectric sharing transmission device is used.

FIG. 8 is a plan view of a shared optical transmission device according to a second embodiment of the present invention.

FIG. 9 is a side view of a shared optical transmission device according to a second embodiment of the present invention.

FIG. 10 is a front view of a shared optical transmission device according to a second embodiment of the present invention.

FIG. 11 is a view showing an optical fiber plug according to a second embodiment of the present invention.

FIG. 12 is a schematic diagram illustrating a contact position relationship between an optical fiber plug and a terminal of a transmission device according to a second embodiment of the present invention.

FIG. 13 is a diagram showing a three-pole analog electrical plug.

FIG. 14 is a schematic diagram showing a contact position relationship between a three-pole analog electrical plug and a terminal of a transmission device.

FIG. 15 is a diagram showing a coaxial digital plug.

FIG. 16 is a schematic diagram showing a contact position relationship between a coaxial digital plug and a terminal of a transmission device.

FIG. 17 is a principle diagram of a transmission device according to a third embodiment of the present invention.

FIG. 18 is a plan view of a shared optical transmission device according to a third embodiment of the present invention.

FIG. 19 is a side view of a shared optical transmission device according to a third embodiment of the present invention.

20 is a DD sectional view in which the internal mechanism of FIG. 18 is omitted.

FIG. 21 is a sectional view taken along the line E-E in which the internal mechanism of FIG. 18 is omitted.

FIG. 22 is a schematic diagram showing a contact position relationship between an optical fiber plug and a terminal of a transmission device according to a third embodiment of the present invention.

FIG. 23 is a view showing an optical fiber plug according to a third embodiment of the present invention.

FIG. 24 is a diagram showing a three-pole analog electrical plug.

FIG. 25 is a front view of a shared optical transmission device according to a fourth embodiment of the present invention.

FIG. 26 is a plan view of a shared optical transmission device according to a fourth embodiment of the present invention.

FIG. 27 is a side view of a shared optical transmission device according to a fourth embodiment of the present invention.

28 is a sectional view taken along line FF of FIG. 26 from which the internal mechanism is omitted.

FIG. 29 is a sectional view taken along line GG of FIG. 26 from which the internal mechanism is omitted.

FIG. 30 is a circuit conceptual diagram of a shared optical transmission device according to a fourth embodiment of the present invention.

FIG. 31 is a diagram illustrating a relationship between types of plugs and outputs at respective terminals according to a fourth embodiment of the present invention.

FIG. 32 is a side view of a proposal example in which an external connector is pulled out perpendicular to a bottom surface.

FIG. 33 is a cross-sectional view of a proposed example in which an external connector is pulled out perpendicular to a bottom surface.

FIG. 34 is a side view of a shared optical transmission device according to a fifth embodiment of the present invention.

FIG. 35 is a sectional view of a shared optical transmission device according to a fifth embodiment of the present invention.

FIG. 36 is a view illustrating an operation of mounting the shared optical transmission device according to the fifth embodiment of the present invention on a mounting substrate.

FIG. 37 is a diagram illustrating a state in which the shared optical transmission device according to the fifth embodiment of the present invention is mounted on a mounting substrate.

FIG. 38 is a plan view showing a shared optical transmission device according to another embodiment of the present invention.

FIG. 39 is a side view showing a shared optical transmission device according to another embodiment of the present invention.

FIG. 40 is a circuit conceptual diagram of a shared optical transmission device according to another embodiment of the present invention.

FIG. 41 is an internal structural diagram of an optical transmission device of Conventional Example 1.

FIG. 42 is a simplified diagram of an optical fiber plug of Conventional Example 1.

FIG. 43 is an external perspective view of an optical transmission device of Conventional Example 1.

FIG. 44 is an internal structural diagram of an optical transmission device of Conventional Example 2.

FIG. 45 is a simplified diagram of an optical fiber plug of Conventional Example 2.

FIG. 46 is an external perspective view of an electrical connection device of Conventional Example 3.

FIG. 47 is an internal structural diagram of a shared optical transmission device of Conventional Example 4.

FIG. 48 is an external perspective view of a shared optical transmission device of Conventional Example 4.

[Explanation of symbols]

 Reference Signs List 22 optical semiconductor element 23 electric plug 23a to 23d electrode part 24 electric connection terminal 25 holder 26 external connector 27 optical fiber plug 36 insertion hole 31, 33 single head 32, 34 constriction 38a, 38b insertion part 41 system identification means 42 insertion identification 42 Means 43 Insulation identification pattern for optical fiber 44 Insulation identification pattern for electrical plug 47 Identification terminal 71 Outer terminal 72 Inner terminal 81 to 83 Resistance element 84 Mounting substrate 85 Leading surface 86 End face 87 Leading portion 88 Bend portion S1 Contact position S2 Non-contact Position Vref, Ai Power supply

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor ▲ Taka ▼ Takashi Oka 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka Inside Sharp Corporation (72) Inventor Koichi Kuwamura 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka No. Sharp Corporation (56) References JP-A-1-183225 (JP, A) JP-A-6-89561 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02B 6 / 42 G02B 6/36 G11B 33/06 H01R 13/46 H01R 24/10

Claims (3)

(57) [Claims] 1. An optical fiber cable including an optical fiber plug used for an optical / electrical transmission device having a common insertion hole into which an insertion portion of an electric plug and an insertion portion of an optical fiber plug can be selectively inserted. The insertion portion has a distal end portion made of a metal body that engages with an engaging body in the shared optical transmission device, and a root portion formed as an insulating portion that prevents a short circuit between a plurality of electric signal transmission terminals in the shared optical transmission device. An optical fiber cable, characterized in that: 2. An electric plug according to claim 1, further comprising an electric signal transmitting terminal connected to the constricted electrode portion of the electric plug for transmitting an electric signal, wherein an insertion portion of the electric plug and an insertion portion of the optical fiber plug can be selectively inserted. In an optical fiber cable including an optical fiber plug used for a shared optical transmission device having a common insertion hole, the optical fiber plug has a metal body at a portion that contacts the electric signal transmission terminal at the time of insertion, and the electrical device at the time of insertion. An optical fiber cable, wherein a portion other than the signal transmission terminal, which is in contact with the other electric signal transmission terminal, is a short-circuit prevention insulating portion. 3. An audio device or information device provided with the optical fiber cable according to claim 1 .