WO2004004078A1

WO2004004078A1 - Series unit

Info

Publication number: WO2004004078A1
Application number: PCT/JP2003/007505
Authority: WO
Inventors: Makoto Kodaira
Original assignee: Uro Denshi Kogyo Kabushiki Kaisha
Priority date: 2002-07-01
Filing date: 2003-06-12
Publication date: 2004-01-08
Also published as: JP4047641B2; JP2004039343A

Abstract

A series unit for TV signal reception comprises an input terminal (1) and an output terminal (2) each having a center contact and an outer contact provided around the center contact. The input and output terminals rotate about a connection section for connection to a unit case (4) while maintaining the electrical connection between the center contacts and electrical connection between the outer contacts. Each outer contact has, at one end of a cylindrical conductor, a pair of projections the rotating axis (RX) of which is perpendicular to the center axis (102X) of the cylindrical conductor. Each center contact is composed of a first center contact provided along the center axis (102X) of the cylindrical conductor and a second center contact projecting from the open end of the projection of the outer contact.

Description

Description Series Unit Unit Technical Field

The present invention relates to a serial unit, and more particularly to a technology effective when applied to a serial unit for receiving a TV signal. Background art

Conventionally, when a coaxial cable connected to a TV antenna installed outdoors or a repeater (distributor) for a cable television (CATV) is drawn indoors, for example, a series unit is used.

For example, as shown in FIGS. 14 and 15, the series unit includes an input terminal 1 and an output terminal 2, and TV terminals 3A and 3B, and the input terminal 1 and the output terminal 2, and And a unit housing 4 integrally supporting the TV terminals 3A and 3B. Although not shown, the series unit is provided with a mounting frame for mounting on the wall of the building. At this time, the mounting frame is fixed by, for example, hooking a nail on a protrusion 5A provided on a side surface of the unit housing 4.

At this time, the input terminal 1 and the output terminal 2 are, for example, terminals for connecting a coaxial cable connected to an outdoor antenna or a repeater (distributor) or a coaxial cable connected to another series unit. In addition, cylindrical outer connectors 102 and 202 are provided around a central connector (not shown). The TV terminals 3A and 3B are terminals for connecting a coaxial cable connected to a terminal such as an indoor TV receiver, for example. As shown in FIG. 0 1 A, 3 0 1 B In addition, cylindrical external contacts 302A and 302B are provided. Further, the center contact of each of the input terminal 1 and the output terminal 2 and each of the TV terminals 3A and 3B has, for example, a female receiving portion having a panel characteristic, and the external connector Is threaded on the outer surface.

In the series unit, the center contacts of the input terminal 1 and the output terminal 2 and the center contacts of the TV terminals 3A and 3B are connected to a print wiring provided inside the unit housing 4. It is electrically connected via a board. The external contacts of the input terminal 1 and the output terminal 2 and the external terminals of the TV terminals 3 A and 3 B are formed integrally with the unit housing 4, and are connected through the unit housing 4. And are electrically connected. The series unit is usually mounted so as to be embedded in the wall of the building. At this time, as shown in FIG. 16, an embedding box 12 for embedding the serial unit is attached to the wall 11, and the antenna or the repeater is opened through an opening of the embedding box 12. The coaxial cable 13 connected to the (distributor) is pulled out.

When attaching the series unit to the wall 11, the coaxial cable 13 pulled out from the opening provided in the embedded box 12 is connected to the input terminal 1 of the series unit as shown in FIG. After connecting to the output terminal 2, the mounting frame 14 provided on the series unit is fixed to the embedded box 12 with screws 15. At this time, the mounting frame 14 has a claw 14 A at a portion corresponding to the protrusion 5 A provided on the side surface of the unit housing 4, and the claw of the mounting frame 14 is provided. 14 A is hooked and fixed to the protrusion 5 A of the unit housing 4.

Also, as shown in FIG. 16, the input terminal 1 and the output terminal 2 are embedded in the embedded box 12 attached to the wall 11, so that the input terminal 1 and the output terminal 2 As shown in FIG. 16, the coaxial cable 13 is provided at a position where the coaxial cable 13 is not entangled. At this time, in a state where the serial unit is mounted on the wall 11, the mounting frame 14 described above, in other words, a portion in which the serial unit is embedded is exposed. Therefore, for example, as shown in FIG. 16, the decorative panel 16 and the decorative plate 17 are attached to hide the portion in which the serial unit is embedded. At this time, although not shown, the decorative panel 16 has, for example, a claw (not shown) provided at a portion corresponding to the projection 5B provided on the side surface of the unit housing 4, The nail of the decorative panel 16 is hooked on the projection 5B of the unit housing 4 and fixed.

In addition, in the case where Internet connection is performed using a CATV network using the serial unit, for example, it is easily affected by electrical noise. For this reason, a series unit has been proposed in which a filter circuit is inserted or a switch for turning on / off the filter circuit is provided.

However, in such a series unit, when the coaxial cable 13 is connected to the input terminal 1 and the output terminal 2, a nut or the like is generally used to prevent the coaxial cable 13 from being easily pulled out. The unit housing 4 is provided beside the input terminal 1 and the output terminal 2 for screwing. Therefore, there is a problem that the connection of the coaxial cable 13 is difficult. Further, when the coaxial cable 13 is connected to the input terminal 1 and the output terminal 2 of the series unit, the coaxial cable 13 taken out of the embedded box 12 is drawn out. Then, the portion pulled out from the embedding box 12 is pulled back and the mounting frame 14 and the embedding box 12 are screwed. At this time, in the conventional series unit, since the input terminal 1 and the output terminal 2 are formed integrally with the unit housing 4, the mounting frame 14 and the embedded box 12 are formed. When screwing the coaxial cable 13 There was a problem that the workability of returning to the inside of the wall 11 was poor.

Accordingly, an object of the present invention is to improve the workability of connecting a coaxial cable to the input terminal and the output terminal in a series unit having an input terminal, an output terminal, and a TV terminal. .

Another object of the present invention is to improve workability when a series unit having an input terminal, an output terminal, and a TV terminal is mounted on a wall of a building. Disclosure of the invention

The present invention relates to an input terminal and an output terminal including a central contact and an external contact provided around the center contact, a TV terminal, the input terminal and the output terminal, and a unit housing that supports the TV terminal. A serial unit comprising the input terminal and the output terminal, and the central contacts of the TV terminal and the external contacts electrically connected to each other, wherein the input terminal and the output terminal Is a series unit that rotates around the connection with the unit housing as a fulcrum. This makes it easy to connect the coaxial cable to a terminal in a narrow place such as a corner of the unit housing. Become. Also, since the direction of the terminals can be changed, it is easy to route after connecting the coaxial cable.

Further, the present invention is a series unit in which the input terminal and the output terminal rotate while maintaining the electrical connection between the central connectors and the electrical connection between the external connectors. This can prevent excessive bending deformation from being applied to the connected coaxial cable.

The present invention also supports an input terminal and an output terminal including a central contact and an external contact provided around the center contact, a TV terminal, the input terminal, the output terminal, and the TV terminal. A unit housing, the input terminal and the output terminal, and the TV A serial unit in which the central contacts of the terminals and the external contacts are electrically connected to each other, wherein the external contacts of the input terminal and the output terminal are formed of a cylindrical conductor. One end has a pair of protrusions such that one of the axes perpendicular to the central axis of the cylindrical conductor portion becomes a rotation axis, and one or both of the protrusions communicates with the cylindrical conductor portion. The input terminal and the output terminal have a center contact, wherein the first contact is provided along a center axis of the cylindrical conductor portion, and the first center contact is provided along the center axis of the cylindrical conductor portion. A second central contact (central connector connection bin) that is electrically connected to the external contact and protrudes from the opening end of the projection of the external contact. Input terminal Of the output terminal is the external contactor series Yunidzu bets that the protrusion supporting me. This makes it easier to connect the coaxial cable to terminals in narrow places, such as a part of the corner of the unit housing. Also, since the direction of the terminals can be changed, it is easy to route after connecting the coaxial cable.

Further, according to the present invention, the first center contact has a female receiving portion having a panel characteristic at both ends, and the second central contact is provided on one of the female receiving portions of the first central contact. Is a series unit in which is inserted. Thus, the input terminal and the output terminal can be rotated while maintaining the electrical connection. At this time, the first center contact is supported by an insulating bush near the center axis of the cylindrical conductor portion of the external contact, and the second contact is an insulating bush. It is supported on the rotating shaft by a spacer. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic diagram showing a schematic configuration of a series unit according to an embodiment of the present invention, and is a front view of the series unit. FIG. 2 is a schematic diagram showing a schematic configuration of the serial unit according to the present embodiment, and is a side view of the serial unit shown in FIG. 1 as viewed from the right in the drawing.

FIG. 3 is a schematic diagram showing a schematic configuration of the series unit of the present embodiment, and is a cross-sectional view of the input terminal taken along line AA ′ of FIG.

FIG. 4 is a schematic diagram showing a schematic configuration of the serial unit according to the present embodiment, and is a cross-sectional view of the input terminal taken along line BB ′ in FIG.

FIG. 5 is a schematic diagram showing a schematic configuration of a series unit according to the present embodiment, and is a side view for explaining features of input terminals. FIG. 6 is a schematic diagram showing a schematic configuration of the series unit of the present embodiment, and is a plan view showing an internal configuration of the series unit.

FIG. 7 is a schematic diagram showing a schematic configuration of the series unit of the present embodiment, and is an exploded view showing a method of supporting input terminals.

FIG. 8 is a perspective view for explaining the features of the series unit of the present embodiment.

FIG. 9 is a schematic diagram for explaining a method of assembling the series unit according to the present embodiment. FIGS. 9 (a) and 9 (b) are perspective views of an external contact used for an input terminal. (c) is a sectional perspective view of FIG. 9 (b). FIG. 10 is a schematic diagram for explaining a method of assembling the series unit of the present embodiment, and is an exploded perspective view for explaining a method of assembling the input terminal.

FIG. 11 is a schematic diagram for explaining a method of assembling the series unit of the present embodiment, and is a cross-sectional perspective view of an input terminal.

FIG. 12 is a schematic diagram for explaining a method of assembling the series unit of the present embodiment, and is a perspective view for explaining a method of attaching an input terminal to a unit housing.

FIG. 13 is a view for explaining how to use the series unit of the present embodiment. It is a schematic cross section.

FIG. 14 is a schematic diagram showing a schematic configuration of a conventional series unit, and is a plan view of the series unit.

FIG. 15 is a schematic diagram showing a schematic configuration of a conventional series unit, and is a side view of the series unit shown in FIG. 14 as viewed from the right in the drawing.

FIG. 16 is a schematic cross-sectional view for explaining a method of using a conventional series unit. BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be described in more detail with reference to the accompanying drawings.

In all the drawings for describing the embodiments, components having the same function are denoted by the same reference numerals, and their repeated description is omitted.

FIG. 1 is a schematic diagram showing a schematic configuration of a series unit according to an embodiment of the present invention, and is a front view of the series unit. FIG. 2 is a side view of the serial unit of FIG. 1 viewed from the right side of the paper. FIG. 3 is a cross-sectional view taken along line AA ′ of FIG. FIG. 4 is a cross-sectional view taken along line BB ′ of FIG. Fig. 5 is a schematic diagram showing the features of the input terminal. FIG. 6 is a schematic diagram showing the internal structure of the series unit, and is a rear view of FIG. FIG. 7 is a schematic diagram for explaining a method of supporting an input terminal. FIG. 8 is a perspective view for explaining the features of the series unit. 3 and 4 show only the cross section of the input terminal.

As shown in FIGS. 1 and 2, the series unit of the present embodiment includes an input terminal 1 and an output terminal 2, and TV terminals 3A and 3B, the input terminal 1 and the output terminal 2, and And a unit housing 4 that supports the TV terminals 3A and 3B. At this time, protrusions 5A and 5B are provided on the side surface of the unit housing 4. Although not shown, the series unit has an installation for attaching to the wall of the building. A mounting frame is provided. At this time, the mounting frame is fixed, for example, by hooking a nail on a protrusion 5A provided on the side surface of the unit housing 4.

The input terminal 1 includes a center contact (not shown) and an external contact 102 provided around the center contact. At this time, as shown in FIGS. 3 and 4, the external connector 102 is connected to one end of the cylindrical conductor 102 A at a center axis of the cylindrical conductor 102 A. 2 has a pair of protrusions 102B such that one of the axes orthogonal to X is the rotation axis RX, and communicates one of the protrusions 102B with the cylindrical conductor portion 102A. It is envisaged to do so.

The center contact of the input terminal 1 is, as shown in FIGS. 3 and 4, a first center contact provided along the center axis 102X of the cylindrical conductor portion 102A. 100 A and the second center contact electrically connected to the first center contact 101 A and protruding from the outer end of the projection 102 B of the external contact 102. G (center contact connection bin).

At this time, the first center contact 101A has a female receiving portion having panel characteristics at both ends, and the second center Contact 101 B is inserted. Further, the first center contact 101A is formed by the insulating first bush 6A and the second bush 6B so that the center axis 1002X of the cylindrical conductor portion 102A of the external contact is formed. The second center contact 101B is supported on the rotation axis RX by an insulating first spacer 17A and a second spacer 17B. . At this time, although not shown, the outer peripheral surface of the cylindrical conductor portion 102A is threaded.

Further, the second center contact 101B is sandwiched by a female receiving portion at one end of the first center contact 101A, and As shown in FIG. 5, it is bent into an L-shape outside the external connector 102. At this time, the second center contact 101B can rotate the axis orthogonal to the center axis 102X shown in FIG. 3 as a rotation axis RX. That is, the angle formed by the axis 10 IX of the protruding portion of the second center contact 101 B and the center axis 102 X of the outer contact 102 shown in FIG. Can be set freely.

Although not shown, the output terminal 2 has the same structure as the input terminal 1.

Further, as shown in FIGS. 6 and 7, the input terminal 1 is composed of a support portion 4A provided on the unit housing 4 and a support portion 8A of the external contact support member 8. It is supported so as to sandwich the protrusion 102B of the external contact. At this time, the unit housing 4 and the external contact supporting member 8 are fitted with the claws (projections) 8B of the external contact supporting member 8 into the grooves 4B of the unit housing 4. The screw holes 8 C and 4 C are fixed with screws.

At this time, the second center contact 101 B of the input terminal 1 is connected to a printed wiring board 9 A provided inside the unit housing 4 as shown in FIGS. Is inserted into the through hole TH and soldered. Although not shown, the output terminal 2 also has a support 4A provided on the unit housing 4 and a support 8A of the external contact support member 8 similarly to the input terminal 1. , And are supported so as to sandwich the protrusion 202B of the external contact. The second center contact of the output terminal 2 is also soldered to a through hole of the printed wiring board 9A.

Although the detailed description is omitted, the center contacts 301A and 301B of the TV terminals 3A and 3B are the same as the first center contact 101A of the input terminal 1. The outer peripheral surfaces of the cylindrical outer connectors 302A and 302B are threaded. In the series unit according to the present embodiment, the second center contact (center contact connecting pin) 101 B drawn from the input terminal 1 and the output terminal 2 can be rotated. That is, if the second center contact 101B is soldered and fixed to the printed wiring board 9A, the input terminal 1 and the output terminal 2 are rotated about the rotation axis RX. be able to. Therefore, in the series unit of the present embodiment, the input terminal 1 and the output terminal 2 are connected to the input terminal 1 and the output terminal 2 with the protrusion 102 B of the external connection as a fulcrum. While maintaining the electrical connection between the center contacts of the TV terminals 3A and 3B and between the external contacts, the first axis AX1 and the second axis AX2 as shown in FIG. Can be moved to any angle.

FIGS. 9 to 12 are schematic diagrams for explaining a method of assembling the series unit according to the present embodiment. FIGS. 9A and 9B are used for an input terminal and an output terminal. FIG. 9 (c) is a cross-sectional view of the external contact of FIG. 9 (b) taken along a plane including the central axis and the rotation axis, and FIG. 10 is an input terminal and an output. Perspective view of the process of inserting the center contact into the external contact used for the terminal.Figure 11 shows the external contact after inserting the center contact and the connection bin into the external contact used for the input and output terminals. FIG. 12 is a perspective view of a process of attaching an input terminal (output terminal) to the unit housing.

When assembling the series unit of the present embodiment, first, an external contact 102 used for the input terminal 1 is prepared. As shown in FIGS. 9 (a), 9 (b), and 9 (c), the external contact used for the input terminal 1 is connected to one end of the cylindrical conductor portion 102A. Provide a projection 102B as a fulcrum when rotating about the axis RX orthogonal to the center axis 100X of the conductor 102A as a rotation axis. At this time, as shown in FIG. 9 (b) and FIG. 9 (c), the cylindrical conductive member extends from one of the protrusions 102B. An opening OP2 communicating with the internal space OP1 of the body 102A is provided. At this time, the external contact 102 used for the input terminal 1 is formed by, for example, zinc die casting. At this time, although not shown, the outer peripheral surface of the cylindrical conductor portion 102A is threaded.

Next, as shown in FIG. 9, the first center contact 101 A and the first center contact 101 are placed in the internal space OP 1 of the cylindrical conductor portion 102 A of the external contact 102 used for the input terminal 1. The bush 6A and the second bush 6B are inserted, and the first spacer 7A, the second spacer 7B, and the second center contact 1 are opened from the opening OP2 of the projection 102B. Enter 0 1 B. At this time, as shown in FIG. 4, the first center contact 101A passes through the opening of the first bush 6A, and one end is connected to the first sensor 7A and the first bush 6A. Insert so that it is between the second spacers 7B. In addition, claws are provided on the second bush 6B, and when the claws are inserted, the claws of the second bush 6B are hooked on a step provided inside the external contact 102, Support so that it does not fall out.

Further, as shown in FIG. 11, the second center connector 101B is formed through the opening of the second spacer 7B and the opening of the first spacer 7A. Insert up to. At this time, the second center contact 101B is located between the first spacer 7A and the second spacer 107B, and is connected to the first center contact 101A. It is sandwiched between female receptacles and is electrically connected to the first center contact 101A.

Although omitted for the sake of repetition, the output terminal 2 is assembled in the same procedure as the input terminal 1.

In addition, while assembling the input terminal 1 and the output terminal 2 in the above procedure, the unit housing 4 to which the input terminal 1 and the output terminal 2 are attached is assembled. The unit housing 4 is formed by, for example, zinc die casting. At this time, print wiring from one side of the T-shaped thickness direction A recess for accommodating the plates 9A, 9B, etc. is formed. At this time, as shown in FIG. 6, a support portion 4A for supporting a projection provided on an external contact of the input terminal 1 and the output terminal 2 is provided in the concave portion.

Although not shown, external contacts 300A and 302B of 1 ^ ¥ terminals 38 and 3B are integrally provided on the back surface side of the unit housing 4 where the concave portions are formed. In advance. Further, for example, projections 5A and 5B as shown in FIGS. 1 and 2 are integrally formed on the side surface of the unit housing 4.

Next, although not shown, the center contacts 301 A, 3B are provided inside the external contacts 302 A, 302 B of the TV terminals 3 A, 3 B of the unit housing 4. Insert bushings for supporting 0 1 B and the central contacts 310 A, 301 B. In addition, the central contact 301 A, 30 IB of the TV terminals 3 A, 3 B and the second central contact of the input terminal 1 and the output terminal 2 are mutually connected to the recess. Wiring boards 9A and 9B for mounting. At this time, the signal wires on the printed wiring boards 9A and 9B are electrically connected to the center contacts 301A and 301B of the TV terminal, and the ground wires are connected to the wires. The unit housing 4 is electrically connected.

When attaching the input terminal 1 and the output terminal 2 assembled according to the above procedure to the unit housing 4, for example, the input terminal 1 is connected to the unit housing 4 as shown in FIG. Align the support 4 A provided in the recess with the protrusion 102 of the input terminal 1, cover the external contact support member 8 from above, and attach the external contact support member 8 with screws or the like. It is fixed to the unit housing 4. At this time, as shown in FIG. 11, the projection 8B is provided on the external connection support member 8 and the projection 8B of the external connection support member 8 is provided on the unit housing 4. Provide groove 4 B corresponding to B Accordingly, the support of the external contact protrusion 102 B of the input terminal 1 and the electrical connection between the external contact 102 of the input terminal 1 and the unit housing 4 are more reliably performed. Become.

At this time, the second center contact 101 B of the input terminal 1 is inserted into the insertion hole (through hole) TH of the printed wiring board 9A as shown in FIG. Fix by soldering.

After that, when the concave portion of the unit housing 4 is closed with the back cover 10 as shown in FIG. 8, the serial unit of the present embodiment can be obtained.

FIG. 13 is a schematic cross-sectional view for explaining how to use the serial unit of the present embodiment.

The series unit is usually mounted so as to be embedded in the wall of the building. At this time, as shown in FIG. 13, an embedding box 12 for embedding the series unit is attached to the wall 11, and the antenna and the repeater are opened from the opening of the embedding box 12. The coaxial cable 13 connected to the (distributor) is pulled out.

When attaching the serial unit to the wall 11, the coaxial cable 13 pulled out of the opening provided in the embedded box 12 is connected to the input terminal 1 of the serial unit as shown in FIG. 13. After connecting to the output terminal 2, the mounting frame 14 provided on the series unit is fixed to the embedding box 12 with screws 15. At this time, the mounting frame 14 has a claw 14 A at a portion corresponding to the projection 5 A provided on the side surface of the unit housing 4, and the claw of the mounting frame 14 is provided. 14 A is hooked and fixed to the protrusion 5 A of the unit housing 4.

When the serial unit is mounted on the wall 11, the mounting frame 14, in other words, the portion in which the serial unit is embedded is exposed. Therefore, for example, as shown in FIG. 13, the decorative panel 16 and the decorative plate 17 are attached, and the serial unit is connected. Hide the embedded part. At this time, although not shown, the decorative panel 16 has, for example, a claw (not shown) provided at a portion corresponding to the protrusion 5B provided on the side surface of the unit housing 4, The nail of the decorative panel 16 is hooked on the projection 5B of the unit housing 4 and fixed.

At this time, in the series unit of the present embodiment, as shown in FIG. 8, the input terminal 1 and the output terminal 2 rotate on the rotation axis RX, so that the input terminal 1 and the output terminal 2 are fixed. The coaxial cable 13 can be easily attached to the input terminal 1 and the output terminal 2 as compared with the conventional series unit.

After attaching the coaxial cable 13 to the input terminal 1 and the output terminal 2, return the coaxial cable 13 to the inside of the wall 11, and mount the coaxial cable 13 on the serial unit. When the screw 14 is screwed into the embedded box 12, the input terminal 1 and the output terminal 2 rotate, so that as shown in FIG. 13, excessive bending deformation is applied to the coaxial cable 13. And the coaxial cable 13 can be returned.

As described above, according to the series unit of the present embodiment, since the input terminal 1 and the output terminal 2 rotate, it is easy to connect the input terminal 1 and the output terminal 2 to a coaxial cable. The workability when connecting the coaxial cable 13 to the input terminal 1 and the output terminal 2 is improved.

Further, since the input terminal 1 and the output terminal 2 rotate, when the series unit is mounted on a wall of a building, unreasonable bending deformation of the coaxial cable connected to the input terminal 1 and the output terminal 2 occurs. its added difficulty kuna Ru _ό reason, the buried Bodzukusu 1 workability when the coaxial cable 1 3 back to the inside of the wall 1 1 drawn from 2 is improved.

Further, in the series unit of the present embodiment, the center contacts of the input terminal 1 and the output terminal 2 are, as shown in FIGS. The first center contact 101A has a female receiving portion having a paneling property, and the second central contact 101B is sandwiched between the female receiving portions, but is not limited thereto. The contact 101 B may have a female receptacle having a paneling property, and the first central contact 101 A may be interposed between the female receptacles. Industrial applicability

As described above, the series unit according to the present invention can easily connect a coaxial cable even in a narrow place or the like. In addition, since the terminal for connecting the coaxial cable is rotated, it is possible to prevent a large bending deformation from being applied to the connected coaxial cable. Therefore, it is useful as a TV terminal for the wall surface when a coaxial cable connected to an outdoor TV antenna is drawn indoors.

Claims

The scope of the claims

1. An input terminal and an output terminal provided with a central contact and an external contact provided therearound, and a TV terminal, and a unit housing for supporting the input terminal, the output terminal, and the TV terminal. A serial unit in which the input terminals, the output terminals, and the center contacts of the TV terminal and the external connectors are electrically connected to each other, wherein the input terminal The series unit, wherein the output terminal rotates around a connection portion with the unit housing as a fulcrum.

2. The series according to claim 1, wherein the input terminal and the output terminal rotate while maintaining an electrical connection between the center contacts and an electrical connection between the external contacts. Unit.

3. An input terminal and an output terminal provided with a central contact and an external contact provided therearound, and a TV terminal, and a unit supporting the input terminal, the output terminal, and the TV terminal. A series unit in which the input terminal, the output terminal, and the center contacts of the TV terminal and the external contacts are electrically connected to each other, comprising: The external contact of the input terminal and the output terminal has, at one end of the cylindrical conductor, a pair of protrusions such that one of the axes orthogonal to the central axis of the cylindrical conductor is a rotation axis, The opening is opened so that one or both of the protrusions and the cylindrical conductor are communicated with each other, and the center contact of the input terminal and the output terminal is formed by the cylindrical conductor. A first central contact provided along the central axis, and a second central contact electrically connected to the first central contact and protruding from an opening end of the projection of the external contact. (The center contact connection pin), and the unit housing includes the input terminal and the output A series unit characterized by supporting a projecting portion of said external contact of a terminal.

4. The first center contact has a female receptacle having a paneling property at both ends, and the second central contact is inserted into one of the female receptacles of the first central contact. 4. The series unit according to claim 3, wherein:

5. The first center contact is supported by an insulating bush near the center axis of the cylindrical conductor portion of the external connector, and the second contact is an insulating bush. 5. The series unit according to claim 4, wherein the series unit is supported on the rotating shaft by a spacer.