JP3001750B2 - Plug / Jack type shared optical transmission equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug / jack type shared optical transmission apparatus used between digital audio equipment and information equipment using a disk or cassette tape as a medium.

[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.

[0012] In view of the above problems, the present invention can be connected to an electric plug of an existing audio device, can unify input / output terminals into one system, and use light or light depending on a cable to be used.
It is an object of the present invention to provide a plug-jack type photoelectric shared transmission device capable of automatically selecting an electric signal transmission means and eliminating an electrical trouble of a product to be used such as an output short circuit.

[0013]

According to a first aspect of the present invention, there is provided an optical semiconductor device for transmitting and receiving light to and from an optical fiber cable for optical transmission as shown in FIGS.
When a plurality of electrical connection terminals 24 for electrical exchange connected to an electrical transmission electric plug 23, the optical semiconductor element 22
And a holder 25 for housing and holding the electrical connection terminal 24
The electric plug 23 or the optical fiber
The optical fiber plug 27 of the cable is
A plug / jack type shared optical / electrical transmission device having both an optical transmission function and an electric transmission function by being inserted into a provided common insertion hole 36 , wherein the insertion hole 3 of the holder 25 is provided.
6 is an optical fiber plug 2 inserted into the insertion hole 36.
7 is the depth L of the insertion hole 36.
1 and the insertion portion 38b of the electric plug 23
Is set to be longer than the length L3 .

The depth of the insertion hole 36 and the optical fiber
The difference from the length of the insertion portion 38a of the fiber plug 27 is 0.
5 mm or less .

Further, the depth of the insertion hole 36 and the electric
The difference from the length of the insertion portion 38b of the plug 23 is 3.7 mm or less.
Below.

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

According to the first aspect of the present invention, when the optical fiber plug 27 is inserted into the insertion hole 36,
Light can be transmitted to the optical semiconductor element 22 in the holder 25 in a stable optical coupling state.

When the small single-headed electric plug 23 is inserted into the insertion hole 36, the electric connection terminal 2
4 and each electrode portion of the small single-headed electrical plug 23 are electrically connected to each other so that electrical signal transmission can be performed.

In this manner, both the optical fiber plug 27 and the small single-headed electrical plug 23 can be selectively fitted and held with high precision and easily detached by one holding body 25.

[0027] Then, the insertion portion 38b of the optical fiber of the insertion portion 38a of the plug 27 length L2 and electrical plug 23
Is set to be shorter than the depth L1 of the insertion hole 36 of the holder 25, it is possible to prevent the plugs 23 and 27 from being in contact with the optical semiconductor element 22 and being damaged.

The insertion portion 3 of the optical fiber plug 27
Since the length L2 of 8a is set to be longer than the length L3 of the insertion portion 38b of the electrical plug 23, the optical coupling between the two is made by bringing the optical fiber plug 27 as close to the optical semiconductor element 22 as possible. Assuredly, the optical characteristics can be improved.

[0029]

[0030]

[0031]

[0032]

[0033]

[0034]

[0035]

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A plug-jack type shared optical transmission apparatus according to a first embodiment of the present invention, as shown in FIGS. 1 to 6, enables an optical system and an electric system to be selectively applied. An optical semiconductor element 22 for transmitting and receiving light to and from an optical fiber cable for optical transmission, and a plurality of electrical connections for transmitting and receiving electricity by connecting to a small single-headed electrical plug 23 for electric transmission (shown in FIG. 6). A terminal 24, a holder 25 for housing and holding the optical semiconductor element 22 and the electrical connection terminal 24, and the holder 2 for connecting the optical semiconductor element 22 to an external circuit.
And an external connector 26 disposed on the outer peripheral surface of the optical fiber cable 5. The optical fiber plug 27 or the electric plug 23 of the optical fiber cable is selectively connected to have an optical transmission function and an electric transmission function. .

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 accommodated 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. Here, α is about 0.2 mm
However, α is in the range of 0.0 mm to 0.5 mm, that is,
If 0.5 mm or less (α ≦ 0.5 mm), optical fiber
Good optical characteristics between the bar plug 27 and the optical semiconductor element 22
Can be maintained well.

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. Note that L1 = 1 from the equations (1) and (2).
4.6 + α + β (mm), and from this and equation (3), L
1-L3 = 0.6 + α + β ± γ (mm) to this
Α ≦ 0.5 mm, 0 mm <β <2 mm,
Considering γ ≒ 0.6 mm, L1−L3 ≦ 3.7 mm
Becomes 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 in the inner peripheral surface of the insertion hole 36 at positions symmetrical 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.

The metal plates 24a, 24c, 2
4d protrudes 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 and 27.

When the plugs 23 and 27 are completely inserted, the metal plate 24b is inserted into the insertion hole 36 at a position where the metal plate 24b engages with the constrictions 32 and 34 of the single heads 31 and 33 of the plugs 23 and 27. It protrudes inward from the circumference.

The metal plates 24a to 24d are elastically deformable toward the outside of the insertion hole 36 so that the plugs 23 and 27 can be detached. The strength is the constriction 32 of the single head 31, 33 of the plug 23, 27 used,
When the contact 34 comes into contact with the electrical connection terminal 24, the torque acting on the plugs 23, 27 used is set to be substantially zero.

In FIGS. 2 to 4, reference numeral 39a denotes a back cover fitted and fixed from the back side of the holder 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 for using the shared optical transmission apparatus 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 appearance of the holder of the present embodiment is sufficient to add a portion capable of holding the optical semiconductor element to the conventional electric connection device, and there is no problem.
7 also typically has a diameter of 3.5 mm, which is smaller than the combined size of both the conventional electrical connection device and the optical transmission device. Further, since both photoelectric transmissions can be performed by one photoelectric sharing transmission device of the present embodiment, the number of parts is reduced and the cost can be reduced.

[Second Embodiment] A plug-jack type photoelectric sharing transmission apparatus according to a second embodiment of the present invention is used for, for example, signal input / output of audio equipment, and includes three types of optical signals, digital electric signals and analog electric signals. The transmission of the system is performed. That is, when used in an output system, as shown in FIG. 7A, there are three types of outputs: an analog electric signal output for a line-out or a headphone, a digital electric signal output by a coaxial cable, and a digital optical signal output. Are performed by the same photoelectric sharing transmission device. When used for an input system of an audio device, as shown in FIG. 7B, an analog electric signal input such as a line-in or a microphone is provided.
Three types of input, a digital electric signal input of a coaxial cable and a digital optical input, are performed by the same shared optical transmission device. The plug / jack type photoelectric sharing transmission apparatus of the present embodiment has a holding member 25 as shown in FIGS.
A system identification means 41 for identifying whether the transmission system of the plugs 23, 27, 45 inserted in the insertion holes 36 is an optical system, a digital electric system, or an analog electric system; Either plug 23, 27,
An insertion identification means 42 for identifying whether or not 45 has been inserted into the insertion hole 36 is provided.

The system identification means 41 is provided in FIG.
As shown in FIG. 6, an optical fiber insulation identification pattern 43 in which an insulating material such as a synthetic resin is formed on the outer peripheral portion of the optical fiber plug 27, and a small single-headed electrical plug 23 for transmitting triode analog electrical signals. Insulation identification pattern 44 for an analog electric plug in which an insulating material such as a synthetic resin is formed on an outer peripheral portion, and for a digital electric plug in which an insulating material such as a synthetic resin is formed on an outer peripheral portion of a digital electric plug 45. An insulating identification pattern 46 and an identification terminal 47 arranged in the insertion hole 36 of the holder 25 are provided.

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 ground 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
Reference numerals 4c and 24d denote 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 discriminating means 42 includes an insertion discriminating 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 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.

By the combination of the above-mentioned continuity and non-conduction, it is possible to identify 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] The second embodiment has the function of identifying the presence / absence of plug insertion and the transmission system. However, when the optical fiber plug 27 as shown in FIG. As shown in FIG. 12, two metal plates 2
4b and 24c are short-circuited through the metal body 57 of the optical fiber plug 27, which may cause an electric trouble depending on an external circuit. Similarly, as shown in FIG. 12, the metal plate 24c and the insertion identifying terminal 63, which are electrically independent, are connected to the metal body 5 of the optical fiber plug 27.
There is also a possibility of short circuit through 7 etc. Then,
Various electrical troubles occur, such as giving noise from the insertion identification terminal 63 side to the metal plate 24c side, or a digital circuit such as a microcomputer externally connected to the insertion identification terminal 63 being damaged or runaway. There is fear. Therefore, in this embodiment, by preventing short-circuiting between different electrical connection terminals to prevent electrical trouble, and by allowing the terminal as the insertion identification means 42 to contact without interposing the outer peripheral surface of the plug, external digital The purpose is to prevent circuit breakage and runaway.

The shared optical transmission apparatus of this embodiment selectively uses the optical fiber plug 27 shown in FIG. 23, the three-pole analog electrical plug 23 shown in FIG. 24, and the digital electrical plug 45 shown in FIG. As shown in FIGS. 17 to 21,
It is premised that a plurality of pairs are formed by providing the same number of the electrical connection terminals 24 and the identification terminals 47, each of which is two by two, and corresponds to each other one-to-one. This is the same as the second embodiment except that the terminals 24, 47
In at least some of the arrangements, the terminals 24 and 47 of different pairs are displaced with respect to the respective insulating identification patterns 43 and 44 of the plugs 23 and 27 so as not to short-circuit through the outer peripheral surfaces of the plugs 23 and 27. ing.

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 that of 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. Considering these facts, in the present embodiment, as the material of the external terminals 71, a material obtained by plating Ag on berylim copper is used, and the thickness thereof is set to 0.2 mm.
On the other hand, as the other metal plates 24b, 24c, 61, and 62, similarly to the first embodiment, those obtained by subjecting phosphor bronze or the like to an Ag plating finish are used, and the plate thickness is set to 0.25 mm. I have.

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 shared optical transmission apparatus according to a fourth embodiment of the present invention is shown in FIGS.
As described above, the optical system, the digital electric system, and the analog electric system can be selected from the three systems described above, which is the same as the above embodiments. In particular, the plug inserted into the insertion hole 36 of the holder 25 is Each of the second embodiments has a point that a method identification means 41 for identifying which method is used and an insertion identification means 42 for identifying whether any plug is inserted into the insertion hole 36 are provided. As in the third embodiment, the electrical connection terminals 24 and the identification terminals 47 and the like have the same arrangement and configuration as those in the third embodiment. The current path for checking the electrical continuity is different from each of the above embodiments.

That is, as shown in FIG. 30, the plug / jack type shared optical / electrical transmission apparatus of this embodiment has
The inner terminal 72 is grounded to ground (GND) as a ground terminal, and the metal plates 61 and 62 and the outer terminal 71 are connected to the constant voltage power supply Vref via resistive elements (pull-up resistors) 81, 82 and 83, respectively. It is connected. As a result, 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. When the external terminal 71 is not contacted, the potential (output) V ₇₁ of the outer terminal 71 becomes high. Further, while the inner terminal 72 is in contact with the ring portion 23d of the electric plugs 23 and 45 and the metal plate 62 is in contact with the ring portion 23d of the electric plugs 23 and 45, the metal plate 62 is short-circuited to the ground. V ₆₂ is low, but the potential _{V 62} of the metal plate 62 when the inner terminal 72 or the metal plate 62 is not in contact with the ring portion 23d of the electric plug 23,45 is high. Similarly, the inner terminal 72 is connected to the ring 23 d of the electrical plug 23.
While the metal plate 61 is in contact with the sleeve portion 23a of the electrical plug 23, the potential _V61 is low because the metal plate 61 is short-circuited to the ground, but the inner terminal 72 is not in contact with the ring portion 23d. Contacting or metal plate 61
There potential V ₆₁ of the metal plate 61 is high when the non-contact state with the sleeve portion 23a of the electrical plug 23.

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. Length of insertion part to be inserted into
The relationship with L3 is L1>L2> L3 as in the first embodiment.

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

[0081] First, when the analog electrical plug 23 has been inserted, in contact with the outer terminal 71 is inside terminal 72 is pushed by the plug 23, the potential V ₇₁ of the outer terminal 71 for the outer terminal 71 is shorted to ground Goes 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 ground via the ring portion 23d of the electric plug 23 and the inner terminal 72, and the potential V _{62 is} reduced.
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 V ₆₁ goes low. That is, all potentials V ₇₁ , V ₆₂ , 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 similarly to 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 V ₇₁ and V ₆₂ of the outer terminal 71 and the metal plate 62 become low,
Potential _{V 61} of the metal plate 61 is high.

When the optical fiber plug 27 is inserted, the ring 23 d of the analog electric 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 _{V 71} of the outer terminal 71 becomes low, the metal plate 61, metal plate 62
Potential _{V 61, V 62} of becomes 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 ground because they do not come into contact with each other.
₇₁ , V ₆₂ and V ₆₁ are all high.

As described above, by detecting the potentials V ₆₁ , V ₆₂ , V ₇₁ 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 or absence of the plug insertion are determined. Can be identified. 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, electric signals other than the original signals input to and output from the plugs 23 and 45 are input. Then, noise is mixed into the original signal. However, in this embodiment, since the inner terminal 72 is grounded,
The type of plugs 23, 27, and 45 and the presence or absence of plug insertion can be identified by passing a small amount of current. Then, it is not necessary to apply a high voltage to the metal plate 61, the outer terminal 71, and the metal plate 62, and the plugs 23, 27, 4
5, a plug 23 generated by applying a high voltage to
27 and 45 noise can be reduced.

[Fifth Embodiment] According to the structure of the plug-jack type shared optical transmission apparatus according to the first to fourth embodiments, FIGS. 1 to 4, FIGS. 8 to 10, and FIGS. As described above, a plurality of metal plates 24a to 24c which are connected to a small single-headed electrical plug for electric transmission and perform electric exchange.
An optical semiconductor element 22 for transmitting and receiving light to and from an optical fiber cable for optical transmission is stored and held in a holding body 25 having a built-in 24d, and its external connector 26 is bent once before reaching the bottom surface of the holding body 25. The holder 25 is arranged so as to be flush with the bottom surface. For this reason, the height from the mounting substrate 84 of the shared optical transmission device is the optical semiconductor element 2.
2 and the distance from the bottom surface of the transparent resin 22b of the external connector 26 to the bending position. Then, the translucent resin 22b
The height from the bottom to the bending position was hindered.

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 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. Thus, it is possible to prevent the occurrence of a gap between the optical semiconductor element 22 and the mounting substrate 84 as in the first to fourth embodiments. 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. Therefore, the height of the shared optical transmission device including the holder 25 can be reduced, and particularly, the portable device is portable. The device can be made thinner.

The present invention is not limited to the above embodiment, and it goes without saying that many modifications and changes can be made to the above 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. Can maintain good optical characteristics.

In the first embodiment, the analog electrical plug 23 has been described by taking a four-pole type as an example. However, it may be applied to, for example, a three-pole type or a two-pole type. Conversely, in the second embodiment and the third embodiment, the analog type electrical plug 23 is described as an example of a three-pole type, but 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 in the holder may be changed in consideration of the material of the optical semiconductor element and the like. .

Further, the inner terminal 72 of the third and fourth embodiments uses a bent piece having elasticity. For example, the outer terminal 71 is disposed above the holder 25,
The inner terminal 72 may be disposed above the insertion hole 36 so as to be able to be separated from and contacted with the outer terminal 71, and may be brought into contact with the plugs 23, 27, and 45 by the weight of the inner terminal 72.

Further, the resistance element 81, which is used in the fourth embodiment,
Although 82 and 83 use ordinary resistors, semiconductor elements such as diodes or capacitors or the like may be used instead.

Further, in the fourth embodiment, the outer terminals 71 and the metal plates 62, 61 are connected to the pull-up resistors 81, 82, 83 having one end connected to the constant voltage power supply Vref. 40, each metal plate 61,
The constant current power supply Ai is connected to the outer terminal 71 and the outer terminal 71.
The resistance elements 81, 82, 83 may be connected to a connection intermediate point with the first element. In this case, 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 no current flows through the resistance element 81, and between the outer terminal 71 and the metal plates 62, 61. Is conductive, the metal plates 61 and 62 are short-circuited to the ground, so that no current flows through the resistance elements 82 and 83. On the other hand, the inner terminal 7
When the second terminal 2 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 when the inner terminal 72 is in contact with the outer terminal 71, if the outer terminal 71 and the metal plates 62, 61 do not conduct, current flows through the resistance elements 82, 83. As described above, by detecting whether or not a current flows through each of the resistance elements 81, 82, and 83, it is possible to identify the type of the inserted plugs 23, 27, and 45 and whether or not the plugs are inserted.

[0099]

As is apparent from the above description, according to the first aspect of the present invention, when an optical fiber plug is inserted into an insertion hole, light is stably coupled to an optical semiconductor element in a holder. Transmission can be performed, and when the electric plug is inserted into the insertion hole, electric signal transmission can be performed by electrically connecting the electric connection terminal and each electrode portion of the electric plug. In this manner, both the optical fiber plug and the small single-headed electrical plug can be selectively fitted and held with high precision by a single holder, and can be easily attached and detached.

[0101] Then, the length of the insertion portion of the length and the electrical plug of the insertion portion of the optical fiber plugs, since shorter than the depth of the holder of the insertion hole, the plug is in contact with the optical semiconductor element It can prevent damage. Also, since the length of the insertion part of the optical fiber plug is set longer than the length of the insertion part of the electric plug, the optical coupling between the two is ensured by bringing the optical fiber plug as close to the optical semiconductor element as possible. And its optical characteristics can be improved.

[0101]

[0102]

[0103]

[0104]

[0105]

[0106]

[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 omitting an internal mechanism;

FIG. 4 is a sectional view taken along the line CC of FIG. 1 omitting an internal mechanism.

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

FIG. 6 shows 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. Diagram showing the case of using a shared optical transmission device

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 shows an optical fiber plug according to a second embodiment of the present invention.

FIG. 12 is a schematic diagram showing 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 shows 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 shows a coaxial digital plug.

FIG. 16 is a schematic view showing a positional 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 sectional view taken along the line DD of FIG. 18 omitting an internal mechanism.

21 is a sectional view taken along line EE of FIG. 18 omitting an internal mechanism.

FIG. 22 is a schematic view 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 diagram showing an optical fiber plug according to a third embodiment of the present invention.

FIG. 24 shows 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.

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 showing the relationship between the type of plug and the output at each terminal according to the fourth embodiment of the present invention.

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

FIG. 33 is a sectional view of a proposal example in which an external connector is drawn 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 showing 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 showing 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 view 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 view of an optical fiber plug of Conventional Example 2.

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

FIG. 47 is a diagram showing the internal structure of a shared optical transmission device according to 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

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI H01R 24/02 G02B 6/42 H01L 31/12 G H01R 13/46 D 23/26 (72) Inventor ▲ Taka ▼ Oka Takashi Osaka 22-22, Nagaikecho, Abeno-ku, Osaka-shi, Sharp Corporation (72) Inventor Koichi Kuwamura 22-22, Nagaikecho, Abeno-ku, Osaka-shi, Osaka Sharp Corporation (56) References JP-A-4-283973 (JP) JP-A-1-183225 (JP, A) JP-A-6-111876 (JP, A) JP-A-6-89561 (JP, A) JP-A-5-258544 (JP, A) 64-12387 (JP, U) Japanese Utility Model 62-193208 (JP, U) Japanese Utility Model 5-81970 (JP, U) Japanese Utility Model 2-27686 (JP, U) Japanese Utility Model Utility Model 3-102750 (JP, U) U) Japanese Utility Model 3131060 (JP, U) Japanese Utility Model 342631 (J , Y2) real public Akira 2-31735 (JP, Y1) (58 ) investigated the field (Int.Cl. ^7, DB name) H01R 17/04 H01R 23/26 H01R 13/46 G02B 6/42

Claims (3)

(57) [Claims] An optical semiconductor element for optical exchanged between the 1. A light transmitting optical fiber cable, a plurality of electrical connection terminals for electrical exchange connected to an electrical transmission electrical plug, the optical semiconductor element and A holder for housing and holding the electrical connection terminal, and an optical fiber of the electrical plug or the optical fiber cable.
A common insertion hole provided with a fiber plug in the holder
Be inserted a plug-jack type photoelectric shared transmission apparatus and the optical transmission functions and electrical transmission function is Ken'yu in the insertion hole of the holding body, optical fiber to be inserted into said insertion hole
The length of the insertion part of the bar plug is smaller than the depth of the insertion hole
The plug must be larger than the length of the insertion part of the electrical plug.
Plug jack type photoelectric shared transmission apparatus characterized in that it is a constant. 2. A plug / jack type photoelectric device according to claim 1.
In the shared transmission device, the depth of the insertion hole and the optical fiber
When the difference from the length of the insertion part of the plug is 0.5 mm or less
Plug jack type photoelectric shared transmission apparatus characterized by some. 3. The plug / jack according to claim 1, wherein
In the optical-type shared transmission device, the depth of the insertion hole and the front
When the difference from the length of the insertion part of the electric plug is 3.7 mm or less
Plug jack type photoelectric shared transmission apparatus characterized by some.