JP3036388U - Divider for CATV - Google Patents

Abstract

(57) Abstract: A CATV branching device having a simple structure and high reliability without instantaneous interruption. SOLUTION: Input terminal and output terminal 101, 101
Conductive elastic member 1 provided on insulating member 102 for supporting
03, top housing 100 and bottom housing 2
A branching device which is bent or restored to be brought into contact with and separated from an input terminal and an output terminal by an action pin 104 which works together with a conductive pin 201 which comes into contact with and separates from an input terminal and an output terminal by being attached to and detached from 00.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a CATV signal branching device, and more particularly to a CATV branching device also used for telephone service.

[0002]

[Prior art]

 A CATV branching device has a branching circuit having a branching terminal between an input terminal and an output terminal, connects the input terminal and the output terminal to a trunk line, and supplies a TV signal from the trunk line to the branching terminal. Is.

There is a movement to use this branching device for telephone service as well, in which a high frequency modulated telephone signal and a direct current for powering the telephone are supplied to the main line by superimposing it on a CATV signal. In this case, the telephone service requires higher transmission reliability than the CATV service.

Here, the CATV branch device may be operated by opening the branch housing for maintenance service. However, in some CATV branch devices, the main line is cut when the housing is opened. .

In the telephone service, it is necessary to prevent the main line from being disconnected even during such maintenance service, and for that purpose, a bypass path for the branch circuit and a switch for automatically switching to the bypass path are provided. A mechanism will be provided.

[0006]

[Problems to be solved by the device]

 For this reason, the configuration is considerably more complicated than that of a normal CATV branching device, which increases the cost.

The present invention has been made in consideration of the above points, and an object thereof is to provide a CATV branching device having a simple structure and high reliability without instantaneous interruption.

[0008]

[Means for Solving the Problems]

 To achieve the above object, the present invention comprises a top housing having an input terminal and an output terminal for a CATV trunk line according to claim 1, and a signal branching circuit board having a plurality of subscriber terminals. A bottom housing which is combined with a top housing and is inserted between the input terminal and the output terminal to branch a signal to the user terminal; and the signal branch when the bottom housing is combined with the top housing. Switch for connecting the input terminal and the output terminal when the bottom housing is removed from the top housing by inserting a circuit board for use between the input terminal and the output terminal for the CAT V trunk line. In a CATV switch having a mechanism, the input terminal and the output terminal have a shape having a plurality of cylindrical portions with different diameters. The input terminal and the output terminal are supported by the same insulating member, and the insulating member is arranged so as to come into contact with the end faces of the cylindrical portions of the input terminal and the output terminal. A conductive elastic member is provided for connecting the input terminal and the output terminal or for separating the input terminal and the output terminal from each other, and the top housing is engaged with the conductive elastic member and is connected to the bottom housing. When the bottom housing is attached to the top housing, a working pin is provided which is projected and retracted according to attachment / detachment, and the input pin and the output terminal are separated by the action of the working pin, and the bottom housing is attached. When removed from the top housing, the input terminal and the output terminal are connected via the conductive elastic member. A branching device for CATV, characterized in that the circuit board for signal branching in the branching device for CATV according to claim 1 is a conductive pin that is engaged with and connected to the input terminal and the output terminal. A branching device for CATV having a clip that engages and connects with said conductive pin at said input terminal and said output terminal, and said working pin in branching device for CATV according to claim 2 according to claim 3. And the conductive pin provides a branching device for CATV, which is provided upright with respect to the joint surface of the top housing and the bottom housing.

With such a configuration, when the bottom housing is attached to the top housing, a signal or the like input from the input terminal reaches the output terminal via the branch circuit board. On the other hand, when the bottom housing starts to be removed from the top housing, the action pin pressed by the internal element of the bottom housing is pushed back by the restoring force of the conductive elastic member, and the conductive elastic member contacts the input terminal and the output terminal. To allow that. As a result, the conductive elastic member directly connects the input terminal and the output terminal.

[0010]

[Embodiment of the invention]

 FIG. 1 is a bottom sectional view of an embodiment of the present invention, showing a state cut along line AA in FIG. 2 described later. The embodiment shown in FIG. 1 is composed of a pair of housings. The upper part in FIG. 1 is a top housing 100, and the lower part is a bottom housing 200. An input terminal IN and an output terminal OUT are arranged on the left and right sides of the top housing 100 in the figure, and the bottom housing 200 is provided with four branch terminals BR in the case shown.

The input terminal portion IN and the output terminal portion OUT of the top housing 100 are provided with input terminals and output terminals 101, 101. The input terminal and the output terminals 101, 101 are housed in an insulating cover 102. Further, a conductive elastic member 103 is provided between the terminals 101, 101, and the conductive elastic member 103 is provided between the terminals 101 when the top housing 100 and the bottom housing 200 are combined. , 101, but when the bottom housing 200 is removed from the top housing 100, the terminals 101, 101 are connected.

A working pin 104 is provided on the housing 102 in order to connect and disconnect the terminals 101, 101. When the housings 100, 200 are combined, a part of the bottom housing 200 acts. One end of the pin 104 is pressed and the other end of the pin 104 deforms the conductive elastic member 103 to separate it from the input terminals and the output terminals 101, 101. When the bottom housing 200 is removed from the top housing 100, the action pin 104 is pushed out by the restoring force of the conductive elastic member 103, so that the conductive elastic member 103 contacts the input terminal and the output terminal 101, 101. Then, both terminals 101 are connected to each other.

FIG. 2 is a plan view of the embodiment shown in FIG. 1, and shows the planar shape of the top housing 100. This embodiment has a so-called waterproof structure, and three screws are provided on the protruding portions provided at two places on the upper left and right sides in the figure and one place at the lower center so as to form a sealed structure for the bottom housing 200. The bottom housing 200 is fixed to the top housing 100 by the stopper. The top housing 100 is fixedly supported by the messenger wire by a metal fitting at the center of the outer surface thereof.

The input terminal portion IN and the output terminal portion OUT each have two openings that are at a right angle to each other, and one of them is used to connect the coaxial cable, and the other opening is Keep it closed. The illustration shows an example of an aerial installation using messenger wires, and the coaxial cables are connected to the openings on both the left and right sides in the figure, but in the case of underground implantation, the input / output terminal section on the lower side in the figure is used to Keep the input / output terminals closed.

FIG. 3 is a bottom view of the embodiment shown in FIG. 1, and shows the plan shape of the bottom housing 200. The bottom housing 200 has, as described with reference to FIG. 2, screw-fastened portions at two upper portions and one lower portion, and is fixed to the top housing 100 by this. Then, a branching cable is connected to the four branching terminals BR arranged side by side in the upper part of the drawing.

FIG. 4 is a side view of the embodiment of FIG. 1 viewed from the same direction as FIG. The top housing 100 is a main part of a branching device having a metal fitting (strand clamp) for attaching to a messenger wire, and is connected to the main line. The bottom housing 200 is fixed to the top housing 100 with screws, and a branching cable (not shown) is connected to the four branch terminals BR.

FIG. 5 is a right side sectional view taken along line BB in FIG. As shown in FIG. 5, the top housing 100 shown on the left side of the figure has a slightly rounded cross-sectional shape, and packing is fitted along the ends thereof to form a waterproof structure. Further, in the case of FIG. 5, the state where the input terminal portion IN is cut is shown, and therefore the coaxial cable connection portion is shown by hatching. On the other hand, the bottom housing 200 shown on the right side of the drawing is provided with a circuit board 202 having conductive pins 201 inside the housing, and this circuit board 202 is connected to a branch terminal BR penetrating between the inside and outside of the housing. There is.

6, 7 and 8 include an insulating cover 102 for accommodating the input terminals and output terminals 101, 101 shown in FIG. 1 and a conductive elastic member 103 for connecting the terminals 101, 101. FIG. 3 is a plan view showing the structure, a side view and a bottom view showing a partial cross section. The insulating cover 102 is provided with several holes and screw holes, and is firmly fixed to the top housing 100 by utilizing the protrusions and screw holes provided in the top housing 100.

The input terminals and output terminals 101, 101 are housed in an insulating cover 102 that is integrally configured. The insulating cover 102 includes a base portion formed by connecting the input terminal to the output terminal, and a cover portion provided separately for the input terminal and the output terminal. The input terminal and the output terminals 101, 101 are supported by being sandwiched between the base portion and the cover portion, and are rotatably supported so that the cables can be connected in any of two directions different by 90 degrees in FIG. It has a special structure. In this rotation operation, the input terminal and the output terminal are screwed at right angles to the axial direction, and the screw 105 for connecting the coaxial cable core wire to these terminals 101, 101 is rotated by a tool such as a driver. It is done by

In the vicinity of the input terminal and the output terminal 101, 101, a working pin 104 that can move in parallel with the axial direction of these terminals is provided. The lower end of the action pin 104 is in contact with the conductive elastic member 103, and when the bottom housing 200 is not assembled as shown in FIG. When the bottom housing 200 is assembled, it is pushed in against the elasticity of the conductive elastic member 103 and deforms the conductive elastic member 103.

The conductive elastic member 103 has a center portion fixed to the base portion of the insulating cover 102 by rivets 106, and both ends thereof are in a floating state so that they can be elastically deformed in response to the pressing of the action pin 104. There is. With this structure, the thickness of the structure for connecting the terminals 101, 101 to each other can be reduced, and the structure can be attached to the innermost part of the top housing, which is convenient for space allocation for arranging the elements inside the branching device. Moreover, since the conductive elastic member 103 is arranged in parallel on the wall surface of the top housing 100 via the insulating cover 102, it is convenient in terms of line impedance.

9A and 9B are cross-sectional structures of the input terminal or the output terminal 101, the action pins 104 at each of these terminals, and the conductive pins on the circuit board 202 connected to these terminals. 2 shows the positional relationship between the circuit board 202 for actuating 201 and the action pin 104, and shows that the main path is not interrupted by the attachment / detachment of the bottom housing 200 to / from the top housing 100.

First, as shown in the figure, the terminal 101 has a cylindrical shape with a large diameter in the central portion and small diameters at both ends, and has two end faces in the portion where the diameter changes. Of these, the conductive elastic member 103 contacts the upper end surface in the figure. By the contact method using this end face, the structure around the terminal can be made compact. Further, since no extra element for the switch mechanism is added to the input / output terminal, the high frequency characteristic is not deteriorated. This is particularly remarkable when the bottom housing 200 is attached. This is because the conductive elastic member 103 is separated from the cylindrical end surface of the terminal 101 when the bottom housing 200 is attached.

Of the two small diameter portions of the terminal 101, the upper portion in the figure has a simple cylindrical shape, but the lower portion has a clip structure for elastically contacting the conductive pin 201.

As shown in FIG. 9A, assuming that the bottom housing 200 is incorporated in the top housing 100, the conductive pin 201 is firmly connected to the terminal 101. Since the lower end of the pin 104 in the figure is pushed up by the circuit board 202, the upper end of the action pin 104 in the figure pushes up the right end portion of the conductive elastic member 103 so that the right end portion of the conductive elastic member 103 is a terminal. It is separated from the intermediate end face of 101. Therefore, the input terminal 101 and the output terminal 101 are connected only through the circuit board 202.

Next, as shown in FIG. 9B, when the bottom housing 200 is to be separated from the top housing 100, the action pin 104 is connected to the conductive elastic member as the circuit board 202 descends downward in the drawing. The elastic repulsive force of 103 pushes it back downward, and the conductive elastic member 103 comes into contact with the end surface of the terminal 101 as shown in the figure. At this time, the terminal 101 is also in contact with the conductive pin 201.

Although not shown, when the bottom housing 200 is further pulled down, the lower end of the action pin 104 separates from the conductive elastic member 103, so that the conductive elastic member 103 elastically contacts the terminal 101, and then the conductive pin 201 Separated from the terminal 101. Therefore, the connection between the input terminal 101 and the output terminal 101 via the circuit board 202 is lost and only the connection via the conductive elastic member 103 is made.

FIG. 10 shows the relationship of each element around the terminal 101. As described above, the terminal 101 is formed in a stepped cylindrical shape, and a hole for inserting the core conductor that penetrates in the radial direction is formed in the center of the terminal 101. There is a hole in it. Therefore, the coaxial cable can be fixed by inserting the center conductor of the coaxial cable into the hole for inserting the center conductor and then tightening the screw.

Then, as described above, the conductive pin 201 of the circuit board 202 is inserted into one end of the hole formed in the central portion.

[0030]

[Effect of the invention]

 According to the present invention, as described above, the conductive elastic member provided on the insulating member for supporting the input terminal and the output terminal is attached to the input terminal and the output terminal by attaching and detaching the top housing and the bottom housing. Since the action pin that acts acts on the terminal by bending or restoring it, it is always connected without disconnecting the input and output terminals even when the bottom housing is removed from the top housing. You can keep it in the proper condition. Therefore, it is possible to provide a branching device which is not inconvenient not only for use in CATV but also for telephone service. Further, since no extra element for the switch mechanism is added to the input / output terminals, high frequency characteristics can be improved. This becomes more remarkable as the conductive elastic member separates from the terminal when the bottom housing is attached.

[Brief description of the drawings]

FIG. 1 is a lower cross-sectional view showing a state of the embodiment of the present invention taken along line AA of FIG. 2 described later.

FIG. 2 is a plan view of the embodiment of FIG.

3 is a bottom view of the embodiment of FIG.

4 is a side view of the embodiment of FIG. 1 viewed from the same direction as FIG.

5 is a right side cross-sectional view taken along the line BB in FIG.

6 is a plan view showing the structure of internal elements of the branching device shown in FIG. 1. FIG.

FIG. 7 is a side view showing the structure of internal elements of the branching device shown in FIG. 1 as a partial cross section.

8 is a bottom view showing the structure of internal elements of the branching device shown in FIG. 1. FIG.

9A and 9B are explanatory views showing a sectional structure of an input terminal or an output terminal 101 and an operation thereof.

FIG. 10 is an explanatory diagram showing the relationship of each element around the terminal 101.

[Explanation of symbols]

 100 Top Housing 101 Terminal (Input Terminal, Output Terminal) 102 Insulation Cover 103 Conductive Elastic Member 104 Action Pin 105 Screw 106 Rivet 200 Bottom Housing 201 Conductive Pin 202 Circuit Board IN Input Terminal OUT Output Terminal BR Branch Terminal

Claims (3)

[Utility model registration claims] 1. A top housing having an input terminal and an output terminal for a CATV main line, and a signal branching circuit board having a plurality of subscriber terminals, and the input terminal and output in combination with the top housing. When a bottom housing inserted between the terminal and a subscriber terminal for branching a signal to the subscriber terminal and the bottom housing are combined with the top housing, the signal branching circuit board is connected to the C
A CATV having a switch mechanism that is inserted between the input terminal and the output terminal for the ATV main line and connects the input terminal and the output terminal when the bottom housing is removed from the top housing. In the branching device, the input terminal and the output terminal have a shape having a plurality of columnar portions having different diameters, the input terminal and the output terminal are supported by the same insulating member, and the insulating member includes: A conductive elastic member is provided which is arranged so as to come into contact with the end surfaces of the columnar portions of the input terminal and the output terminal, and which connects the input terminal and the output terminal and separates them from each other. The top housing is provided with an action pin that is engaged with the conductive elastic member and that appears and disappears when the bottom housing is attached or detached. When the bottom housing is attached to the top housing, the input pin and the output terminal are separated by the action of the action pin, and when the bottom housing is removed from the top housing, A branching device for CATV, wherein the output terminal is connected through the conductive elastic member. 2. The branching circuit for CATV according to claim 1, wherein the signal branching circuit board has a conductive pin that is engaged with and connected to the input terminal and the output terminal. The branching device for CATV which has a clip which engages and connects with the said conductive pin in an output terminal. 3. The CATV branch device according to claim 2, wherein the action pin and the conductive pin are provided upright with respect to a joint surface of the top housing and the bottom housing.