JPH0656780B2 - Information connector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an information connector, and more specifically to transmitting a high frequency signal such as a commercial broadcast and an information signal for transmitting various information in a building through the same signal line. The present invention relates to an information connector which is used in a home bus system and which detachably connects a signal line and an external device.

BACKGROUND ART Generally, as a home bus system of this type, as shown in FIG. 9, a coaxial cable is used as a signal line 3, and a broadcast signal received by an antenna 4 and information for transmitting various information in a building. A signal is considered to be transmitted via the same signal line 3. Here, it is assumed that the information signal includes a high frequency signal and a low frequency baseband signal as compared with the high frequency signal, and the broadcast signal is a high frequency signal. An outlet 1 having a branch circuit 6 is inserted in an appropriate place of the signal line 3 so that a high-frequency signal and a baseband signal are separated and taken out from each outlet 1. That is, each outlet 1 includes a pair of signal source side terminals 7 connected to the signal line 3, and a baseband terminal 8 for extracting a baseband signal.
And a high frequency terminal 9 for extracting a high frequency signal. Plugs 2a and 2b are detachably connected to the terminals 8 and 9, respectively, and the plugs 2a and 2b are connected to external devices such as a television receiver and various information devices. Here, the broadcast signal received by the antenna 4 is connected to the outlet 1 via the head end 5. The information signal transmitted between the information devices is transmitted via the high frequency terminal 9 of the outlet 1 on both sides when the information signal is a high frequency signal, and when the information signal is a base band signal. It is transmitted via the baseband terminal 8 of the outlet 1 on both sides of transmission and reception. The baseband terminal 8 can input and output a DC signal and a signal superimposed on a commercial power supply.

In such a home bus system, the outlet 1
Includes a branch circuit 6 as shown in FIG. 10, and the branch circuit 6 is configured to separate and extract the high frequency signal and the baseband signal transmitted through the signal line 3. That is, a pair of signal source side terminals 7 are electrically directly connected to each other, and a high frequency signal is separated and extracted by a DC blocking capacitor 32 having one end connected to a line between both signal source side terminals 7. The baseband signal is separated and extracted by the choke coil 35 for high frequency cutoff, one end of which is connected to. A series circuit of a damping resistor 33 and a matching resistor 34 is connected to the other end of the capacitor 32, and the high frequency terminal 9 is connected to the connection point of the resistors 33 and 34. The baseband terminal 8 is provided at the other end of the choke coil 35. Since the branch circuit has such a configuration, the signal source side terminal 7 and the high frequency terminal 9, and the signal source side terminal 7 and the baseband terminal 8 are capable of bidirectional signal transmission, respectively. The loss is set to about 10 dB. The outlet 1 connected to the end of the signal line 3 does not require the feed wiring, and therefore one of the signal source side terminals 7
Is a branch circuit 6'as shown in FIG.

By the way, as shown in FIG. 12, a conventional outlet 1 in which such a circuit is installed is formed in a box shape having a mounting piece 40, and signal source side terminals 7 are provided on both side surfaces, respectively. The high frequency terminal 8 and the baseband terminal 9 are separately provided on the front surface. The high frequency terminal 8 is generally formed in a shape as shown in FIG. 13, and a first contact conductor 13 for signal transmission and a second contact conductor for grounding are provided in a recess 11 formed in the front surface of the casing. 14 are disposed, and the two contact conductors 13 and 14 are coaxially disposed such that the first contact conductor 13 is surrounded by the cylindrical second contact conductor 14. A high frequency plug 2a and a base band plug 2b, which are connected to an external device through connecting wires, are detachably coupled to the high frequency terminal 9 and the base band terminal 8 respectively. However, since the high-frequency terminal 8 and the baseband terminal 9 are separately provided at different positions, and a space for providing two terminals 8 and 9 is required, there is a problem that the outlet 1 becomes large in size. When only one of the terminals 8 and 9 is used, there is a problem that the other space is wasted.

[Object of the Invention] The present invention has been made in view of the above points, and its main object is to provide both a high-frequency terminal and a baseband terminal at one location at the same time, and It is to provide an information connector that can be miniaturized.

DISCLOSURE OF THE INVENTION Embodiment 1 FIGS. 1 and 2 show an outlet 1 and FIG. 3 shows a plug 2 detachably connected to the outlet. The outlet 1 has a recess 11 that opens in a circular shape on the front surface (the upper surface in FIG. 1), and a cylindrical insulating base 12 is provided at the center of the recess 11 so as to project coaxially with the recess 11. ing. A cylindrical first contact conductor 13 is inserted in the center of the insulating base 12, and a circular second contact conductor 14 is formed over the entire circumference of the insulating base 12. Have been installed. Further, the second contact conductor 14 is provided on the inner peripheral surface of the recess 11.
A third contact conductor 15 formed in a columnar shape having a larger radius than that is mounted over the entire circumference. With such a configuration, the first contact conductor 13, the second contact conductor 14, and the third contact conductor 13
The contact conductors 15 and 15 are coaxially arranged. On the other hand, as shown in FIG. 2, the plug 2 is arranged coaxially with the pin-shaped first contact conductor 16 inserted into the first contact conductor 13 of the outlet 1 and the first contact conductor 16. And the cylindrical insulating ring 17 that has been formed are projected on the front surface (the upper surface in FIG. 2),
A cylindrical second contact conductor 18 is mounted on the entire inner peripheral surface of the insulating ring 17, and a cylindrical third contact conductor 19 is mounted on the entire outer peripheral surface of the insulating ring 17. It has a shaped shape. However, when the plug 2 is coupled to the outlet 1, the contact conductor 16 is inserted into the contact conductor 13, and the second contact conductors 14 and 18 of the outlet 1 and the plug 2 are connected to each other, and the third contact conductor. 15, 19
The comrades come into contact with each other. In the outlet 1, the branch circuit 6, as shown in FIG. 10 or FIG.
6'is installed, and the signal transmitting side of the high frequency terminal 9 serves as the first contact conductor 13 and the signal transmitting side of the baseband terminal 8 serves as the third contact conductor 15. Also, both terminals 8, 9
The ground side of is commonly connected to the second contact conductor 14. Here, the periphery of the first contact conductors 13 and 16 is surrounded by the grounded second contact conductors 14 and 18, and the third contact conductors 15 and 19 are more than the second contact conductors 14 and 18. The external arrangement prevents the high frequency signal from being influenced by the baseband signal.

By the way, when it is desired to connect a plurality of information devices that use baseband signals to one outlet 1, a plug 2'as shown in FIG. 4 can be used. The plug 2'includes a connecting portion to the outlet 1 and a plug connecting portion having the same structure as that of the outlet 1. That is, the plug connecting portion is provided with the recess 21, the insulating base 22 is provided in a protruding manner at the center of the recess 21, and the contact conductor 23 of the base 2 is mounted on the outer peripheral surface of the insulating base 22 over the entire circumference. Further, the third contact conductor 24 is mounted on the inner peripheral surface of the recess 21 over the entire circumference, so that the second contact conductor 23 is electrically connected to the contact conductor 18, and the third contact conductor 23 is also connected to the third contact conductor 23. Contact conductor 24
Are electrically connected to the contact conductor 19. If the plug 2'having such a structure is used, the plugs 2'can be connected one after another, and if each information device is connected to the connection line drawn out from the plug 2 ', a plurality of information devices can be connected to one outlet 1. Can be connected.

Second Embodiment In the first embodiment, the baseband signal is taken out as an unbalanced output, but in the present embodiment, it is taken out as a balanced output.

FIG. 5 shows the outlet 1 and FIG. 6 shows the plug 2. In the first embodiment, the baseband terminal 8 is the second contact conductor 1
4 and 18 and the cylindrical third contact conductors 15 and 19 arranged coaxially with the second contact conductors 14 and 18, but in the present embodiment, the base band terminal 8 is a cylinder. Is formed of a pair of semi-cylindrical bodies that are divided in two by a plane including the axis. That is, each semi-cylindrical body serves as the contact conductors 25a and 25b of the base band terminal 8. On the other hand, also in the plug 2, the baseband contact conductors 25a and 25b
Corresponding to the above, semi-cylindrical contact conductors 26a and 26b are provided. Branch circuit 6 ″ installed in outlet 1
As shown in FIG. 7, a baseband signal blocking capacitor 32 and a series circuit of an attenuation resistor 33 and a matching resistor 34 are connected in series, and one end of the series circuit is connected to a signal line and The end is grounded, and the first contact conductor 13 is connected to the connection point of the resistors 33 and 34 to separate and extract the high frequency signal. For the baseband signal, the choke coil 35 for cutting off the high frequency signal and the primary winding of the pulse transformer 36 are connected in series, one end of this series circuit is connected to the signal line, and the other end is grounded. Both ends of the secondary winding of the contact conductors 25a, 2
By setting to 5b, the baseband signal is separated and extracted as a balanced output.

Here again, since the first contact conductor 13 is surrounded by the ground conductor 14, it is not affected by the baseband signal. In addition, one outlet 1 as in the first embodiment.
When a plurality of information devices are connected to the plug, a plug 2 ″ having a plug connecting portion may be used as shown in FIG.

[Effect of the Invention] As described above, the present invention is an information connector used in a home bus system for transmitting a high frequency signal of a commercial broadcast or the like and a low frequency baseband signal as compared with a high frequency signal through the same signal line. There is an outlet provided with a branch circuit for separating the high frequency signal and the base band signal transmitted through the signal line, a high frequency terminal for extracting the high frequency signal from the output of the branch circuit, and a base band terminal for extracting the base band signal, A plug that is detachably coupled to the outlet and has a high-frequency terminal and a baseband terminal that can be electrically connected to the high-frequency terminal and the baseband terminal of the outlet, respectively. Since the other side is surrounded, the high frequency terminal and the baseband terminal are provided separately. Both terminals can be provided in one place without
There is an advantage that space is saved and, as a result, the outlet can be downsized. Further, there is an advantage that it is not necessary to distinguish the plugs for the high frequency signal and the baseband signal.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of an outlet used in Embodiment 1 of the present invention, and FIG. 2 is a perspective view showing the same outlet.
FIG. 3 is a perspective view showing a plug used in the same as above, FIG. 4 is a perspective view showing another plug used in the same as above, and FIG. 5 is a perspective view of a main part of an outlet used in Embodiment 2 of the present invention. Sixth
FIG. 7 is a perspective view of a plug used in the same as above, FIG. 7 is a circuit diagram of a branch circuit used in the same as above, FIG. 8 is a perspective view showing another plug used in the same as above, and FIG. 9 is a home according to the present invention. FIG. 10 is a schematic diagram of a bus system, FIGS. 10 and 11 are circuit diagrams showing branch circuits used in the same, FIG. 12 is a perspective view showing a conventional example, and FIG. 13 is a partially enlarged view of the same. 1 is an outlet, 2 is a plug, 3 is a signal line, 6, 6 ',
6 ″ is a branch circuit, 8 is a baseband terminal, 9 is a high frequency terminal, 13 to 16, 18, 19, 25a, 25b, 26a, 26
Each b is a contact conductor.

Claims (3)

[Claims] 1. An information connector used in a home bus system for transmitting a high-frequency signal for commercial broadcasting and a low-frequency baseband signal as compared with a high-frequency signal through the same signal line, and transmitting the signal line. An outlet provided with a branch circuit for separating the high-frequency signal and the baseband signal, and a high-frequency terminal for extracting the high-frequency signal from the output of the branch circuit and a baseband terminal for extracting the baseband signal;
A plug that is detachably coupled to the outlet and has a high-frequency terminal and a baseband terminal that can be electrically connected to the high-frequency terminal and the baseband terminal of the outlet, respectively. An information connector, characterized in that the other side is formed so as to surround the periphery. 2. The high frequency terminal has a first portion for transmitting a high frequency signal.
And a cylindrical second contact conductor that surrounds the first contact conductor and is disposed coaxially with the first contact conductor. The baseband terminal is the second contact conductor. And a cylindrical third contact conductor that transmits a baseband signal and surrounds the second contact conductor and is coaxially arranged with the second contact conductor. The information connector according to claim 1, wherein the information connector is grounded. 3. The high frequency terminal has a first portion for transmitting a high frequency signal.
And a cylindrical second contact conductor that is grounded and surrounds the first contact conductor and is coaxially arranged with the first contact conductor. It is characterized in that it is formed by a pair of semi-cylindrical contact conductors that surrounds the circumference of the second contact conductor and is arranged coaxially with the second contact conductor by dividing the cylinder into two parts in a plane including the axis thereof. The information connector according to claim 1.