JP2000100532A - Relay for coaxial cable and electronic apparatus with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect a short coaxial cable to an electronic apparatus with an existing connector without providing any special constitution on the electronic apparatus side. SOLUTION: A male screw section 54 connectable to the output terminal of a tap-off is formed at one end section of a conductive tubular body 52, and a female screw section 60 connectable to a connector 18 for connecting a coaxial cable is formed at the other end section. A central conductor connection section 62 is arranged along the length direction in the tubular body 52. One end section of the central conductor connection section 62 is protruded outward from one end section of the tubular body 52, and the other end section of the central conductor connection section 62 can be connected to the central conductor 28 of the connector 18 inserted into the tubular body 52 from the other end section of the tubular body 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repeater for a coaxial cable and an electronic device connected in the middle of the coaxial cable and suspended on a messenger wire in a joint receiving facility.

[0002]

2. Description of the Related Art In the middle of a coaxial cable used in a joint receiving facility, many electronic devices, for example, a splitter, a distributor, various amplifiers, and a power supply inserter are interposed. These electronic devices may be replaced during maintenance work performed at regular intervals. The connection between the electronic device and the coaxial cable is detachably performed via a connector. However, when exposed to the weather for many years, the housing and connector of the electronic device are rusted and hard to be detached, and the coaxial cable may be cut from the insertion portion of the connector, and the connector and the electronic device may be removed together. . In this case, connect a new connector to the cut end of the coaxial cable,
This connector is attached to a new electronic device.

However, in such a method, the length of the coaxial cable is shortened by the length of the connector, and the coaxial cable must be relaid. To prevent this, for example, in Japanese Patent Application Laid-Open No. 9-259949, a tubular body is provided at a place where a cable connection hole is provided in a housing of an electronic device, and an outer end portion of the tubular body is provided. A screw groove for connector connection is formed on the inner surface of the connector, and in a state where the screw portion of the connector is screwed into the screw groove, the center conductor of this connector is passed through the tubular body and connected to the center conductor connection terminal in the housing. Is disclosed.

[0004]

However, in this connection structure, a connector having a longer center conductor than a normal connector must be used. However, such a connector may not exist as an off-the-shelf product and is difficult to obtain. In addition, since the long central conductor of the connector must be inserted into the cylindrical body and securely connected to the central conductor connection terminal in the housing, the guide for the central conductor is provided inside the cylindrical body of the housing. Must be provided.
However, mounting such a guide in a tubular body is rather cumbersome.

It is an object of the present invention to provide a coaxial cable repeater that can use a ready-made connector as it is and does not require any special configuration on the electronic device side.

[0006]

According to one aspect of the present invention, there is provided an electronic apparatus having a first screw portion connectable to a screw portion of a coaxial cable connection portion of an electronic device. A conductive tubular body having a second screw portion connectable to a connector for connecting a coaxial cable at the other end thereof; and a conductive tubular body disposed along the length direction inside the tubular body and having one end portion. A central conductor connecting portion projecting from one end side of the tubular body, the other end portion of which can be connected to the central conductor of the connector inserted therein from the other end of the tubular body. ing.

According to the present invention, when the first screw portion at one end portion of the conductive tubular member is screwed into the screw portion of the coaxial cable connection portion of the electronic device, the conductive member projects from the one end side of the tubular body. The center conductor connection portion is connected to a center conductor connection terminal inside the electronic device. Further, when a connector for connecting a coaxial cable is screwed into the second screw portion at the other end of the tubular body, the center conductor of this connector is connected to the central conductor connecting portion inside the tubular body. Therefore, if the length of the conductive tubular body is selected to be, for example, equal to or longer than the length of the body of the connector, the coaxial cable may be cut at the insertion portion of the coaxial cable in the connector during maintenance and inspection. The cut coaxial cable can be used again, and a normal connector can be used as it is.

[0008] The other end of the center conductor connection portion has an opening on the other end side of the tubular body, and has a recess formed from the opening along the length direction of the center conductor connection portion, The central conductor of the connector may be inserted into the concave portion, and may have pressing means for pressing the central conductor of the connector against the concave portion on the opposite side from the side of the concave portion.

As described above, since the center conductor of the connector is pressed against the concave portion of the center conductor connection portion by the pressing means, the center conductor connection portion and the center conductor of the connector are electrically and mechanically well connected. .

In this case, the center conductor connecting portion is desirably mechanically supported inside the cylindrical body, and can be supported by, for example, an insulator provided inside the cylindrical body. In a state where the center conductor connection portion is supported, the connection between the center conductor connection portion and the center conductor of the connector can be easily performed. In addition, since the repeater can be maintained in a coaxial structure by being supported by the insulator, the signal can be transmitted well. Further, an opening for operation can be provided at a position corresponding to the pressing means on the side of the tubular body so that the pressing means can be operated from the outside to be in a pressed state. Further, it is desirable to provide a lid member so that moisture does not enter the cylindrical body through the opening.

According to another aspect of the present invention, there is provided a main body of an electronic device having a plurality of cable connection portions on both sides, and a coaxial cable repeater connected to one of the cable connection portions. . The repeater has a first screw portion connectable to the one cable connection portion at one end, and a conductive tube having a second screw portion connectable to a coaxial cable connection connector at the other end. A cylindrical body, arranged along the longitudinal direction of the cylindrical body, one end protruding from one end of the cylindrical body,
A central conductor connecting portion connected to the central conductor of the one cable connecting portion and the other end connected to the central conductor of the coaxial cable connecting connector inserted from the other end of the tubular body;
Have. The cylindrical body is about 2 mm of the body of the connector.
It has a length not less than twice the length dimension.

According to this aspect, for example, when the connectors are respectively connected to the cable connecting portions on both sides of the main body of the electronic device, even if the coaxial cables are cut at the coaxial cable insertion portions of these connectors, both coaxial cables are cut. It is not necessary to connect the repeaters to the cables, respectively, and it is sufficient to provide the repeater only at one cable connection part, and it is sufficient to connect a normal connector to the other cable connection part.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The repeater of the present embodiment is used together with an electronic device, for example, a device for a common reception facility, more specifically, a device having a coaxial cable connection portion such as a branching device, a distributor, various amplifiers or a power inserter. .

FIGS. 2 and 3 show an example of a branching device or a distributor (hereinafter, referred to as tap-off). As shown in FIG. 2, the tap-off 2 has a substantially rectangular upper housing 4 made of, for example, aluminum die-cast, and has an input terminal 6 on one side of the upper housing 4 and an output terminal on the other side. It has a terminal 8. The tap-off 2 is suspended on a messenger wire (not shown) by using a mounting bracket 7. As shown in FIG. 3, tap-off 2 is provided on lower housing 1 fixed to upper housing 4.
0 has a plurality, for example, eight branch or distribution terminals 12.

The output terminal 8 has a cylindrical body 14 formed integrally with the upper housing 4. On the inner peripheral surface of the cylindrical body 14, for example, as shown in FIG. Is formed. The female screw portion 16 can be screwed with a male screw portion 20 formed on the outer peripheral surface of one end of the coaxial connector 18 as shown in FIG. 1, for example.

As shown in FIG. 1, a coaxial cable center conductor connection terminal 22 is provided in the upper housing 4 in a cylindrical body 14.
Are provided corresponding to the openings on the inner surface side of the housing. The coaxial cable center conductor connection terminal 22 has a pin 26 implanted on an insulator 24, which is not shown, but is located in a space surrounded by the upper housing 4 and the lower housing 10. It is connected to the output side of a provided branch circuit or distribution circuit. From the position corresponding to the center of the cylindrical body 14 on the surface of the pin 26 facing the cylindrical body 14,
Through hole 3 through which center conductor 28 of coaxial connector 18 can be inserted
0 is drilled. A set screw 32 is inserted into the through hole 30 at a right angle from the side of the through hole 30, and the center conductor 28 of the coaxial connector 18 is firmly connected to the pin 26 both electrically and mechanically. I do.

In order to rotate the holding screw 32 from the outside of the upper housing 4, a cylindrical body 34 for operation is formed on the upper housing 4 along an extension of the holding screw 32 in the longitudinal direction. A female screw portion 36 is formed on the inner peripheral surface of the cylindrical body 34, and a threaded lid 38 is screwed into the female screw portion 36 to prevent moisture or the like from entering the inside of the housing.

The input terminals 6 are also configured in the same manner as the output terminals 8 and are arranged symmetrically with respect to an axis a passing through the center of the long side of the upper housing 4 perpendicularly to the long side as a symmetric axis. Detailed description is omitted. In addition, 40 shown in FIG. 1 is a tubular body corresponding to the tubular body 14, 42 is an operating tubular body corresponding to the operating tubular body 34, and 44 is a threaded lid 38. A corresponding screw lid. Although not shown, the same coaxial cable center conductor connection terminal as the coaxial cable center conductor connection terminal 22 is provided in the housing.

The input terminals 6, 8 of such tap-off 2
With the connector with coaxial cable connected to
In order to replace the tap-off 2, for example, the coaxial cable may be cut at the insertion portion of the coaxial cable of the connector, and the tap-off and the connector may be removed. When replacing a new connector with the same tap-off 2, when the new connector is connected to the original coaxial cable, the coaxial cable is shortened by the length of the connector. 8 cannot be connected. Therefore, the repeater 50 of one embodiment of the present invention is used.

The repeater 50 is attached to the input terminal 6 and the output terminal 8 as shown in FIG. The repeater 50 has a tubular body 52 made of a conductive metal as shown in an enlarged manner in FIG.

The outer diameter of one end of the cylindrical body 52 is substantially equal to the inner diameter of the cylindrical body 14 of the upper housing 4 and is substantially equal to the distance at which the female screw portion 16 on the inner peripheral surface of the cylindrical body 14 is formed. A first threadable engagement with this female thread 16 over an equal distance
, For example, a male screw portion 54 is formed.

The other end of the cylindrical body 52 is connected to a conductive metal connector 18 which is originally connected to the output terminal 8 as shown in FIG.
(The portion from the surface on which the coaxial cable 58 is inserted to the surface on which the male screw portion 20 is formed) 56 has an outer diameter substantially equal to the outer diameter of the male screw portion of the connector 18. A second screw portion, for example, a female screw portion 60, which is substantially equal to the outer diameter of the male screw 20 and is screwed to the male screw portion 20, is formed on this inner peripheral surface. This has a length substantially equal to the length direction of the male screw portion 20. The male screw portion 54 and the female screw portion 60 are arranged concentrically about the center axis of the tubular body 52.

An intermediate portion of the cylindrical body 52 is formed in a hexagonal shape having the largest outer diameter, and has an inner diameter substantially similar to that of the female screw portion 60. The inner diameter of the portion where the male screw portion 54 is provided is smaller than the inner diameter of the portion where the female screw portion 60 is provided. From the tip of this intermediate part, the cylindrical body 5
The distance D to the other end of the connector 2 is equal to or longer than the length L of the body portion 56 of the connector 18.

Inside the cylindrical body 52, the cylindrical body 5
2 so that the center conductor connecting portion 62
Is arranged. The center conductor connecting portion 62 is a cylindrical shape made of a conductive metal. The center conductor connecting portion 62 has a distal end portion 62 a protruding from one end portion of the tubular body 52, and the protruding length is substantially the same as that of the central conductor 28 of the connector 18 protruding from the end surface of the male screw portion 20. It is length.

The base end 62b of the center conductor connecting portion 62
Are formed near the inner rear end of the female screw portion 60 and are formed in a columnar shape thicker than other portions of the center conductor connection portion 62. A concave portion 66 which is, for example, a cylindrical hole is formed from the end face of the base end portion along the length direction. The concave portion 66 is provided between the male screw portion 20 of the connector 18 and the center conductor 2.
The length and diameter are selected so that the protruding part of 8 can be connected.

A screw hole 68 is formed in a side wall of the base end portion 62b, and a pressing means, for example, a pot screw 70 is arranged so as to be screwed into the screw hole 68. The potato screw 70 has a hole 72 formed therein, and a tool,
For example, a hexagon wrench is inserted and the potato screw 70 is rotated to move forward and backward.

In order that the operation of the pot screw 70 can be performed from the outside of the tubular body 52, an intersection between an axis extending along the length direction of the pot screw 70 and a middle portion of the tubular body 52 having a large diameter. Is formed with a screw hole 74 having a larger diameter than the potato screw 70, and a threaded lid 76 is screwed into the screw hole 74. Since the screwed lid 76 is provided, moisture does not enter the inside of the tubular body 52. To further enhance the waterproof effect, the O-ring 7
8 is also provided. The screw hole 74 is provided in a thick part of the middle part of the tubular body 52.

The center conductor connecting portion 6 is provided inside the cylindrical body 52.
An insulator 80 is filled in order to maintain the position 2 on the central axis of the tubular body 52 and to make the repeater 50 have a coaxial structure. An annular body that comes into contact with the inner peripheral surface of the cylindrical body may be attached to the base end of the center conductor connection part 62, thereby supporting the center conductor connection part 62. Further, an O-ring 82 is provided at a position of the outermost thread portion 54 from the center. This is for waterproofing when the male screw portion 54 is screwed into the input terminal 6 or the output terminal 8. An annular projection 84 is formed on the outer peripheral surface of the other end of the tubular body 52. This is to prevent the tube from coming off when the heat shrink tube is attached after the connector 18 is connected to the repeater 50.

The use of such a repeater 50 is performed as follows. As shown in FIG.
4 is screwed into the female screw portion 16 of the output terminal 8. At this time,
As shown in FIG. 1, the distal end portion 62 a of the center conductor connection portion 62 of the repeater 50 is inserted into the through hole 30 of the pin 26 of the coaxial cable center conductor connection terminal 22. In this state,
Remove the screw cover 38, insert a screwdriver, etc. inside,
By rotating the holding screw 32, the distal end portion 62 a of the center conductor connecting portion 62 is firmly connected to the pin 26. Then, the screwed lid 38 is attached again.

Next, as shown in FIG.
The male screw part 20 of the new connector 18 connected to 8 is screwed into the female screw part 60 of the repeater 50. At this time, the distal end of the central conductor 28 of the connector 18 is inserted into the concave portion 66 of the central conductor connection portion 62 of the repeater 50. In this state, remove the screw cover 76 of the repeater 50, insert a hexagon wrench,
By tightening the potato screw 70, the distal end of the center conductor 64 of the connector 18 is firmly connected to the recess 66 both electrically and mechanically. Thus, the center conductor 64 of the connector 18 is electrically connected to the pin 26 of the coaxial cable center conductor connection terminal 22 via the center conductor connection portion 62 of the repeater 50.
The body 56 of the connector 18 is electrically connected to the tubular body 14 of the output terminal 8 of the tap-off 2 via the tubular body 52 of the repeater 50.

Thus, even if the length of the coaxial cable 58 is shortened by using the repeater 50, the coaxial cable 58 can be connected to the output terminal 8 of the tap-off 2. No special improvement is required for the tap-off 2 for this connection, and a ready-made connector can be used as it is.

Similarly, a coaxial cable is connected to the input terminal 6 using the repeater 50 on the input terminal 6 side.

After the connector 18 is connected to the repeater 50, when adjusting the screwing state of the male screw portion 20 of the connector 18 to the female screw portion 60, the repeater 50 is held down by one tool, There is no problem if the connector 18 is rotated with the tool described in the above, but if the connector 18 is rotated without pressing the repeater 50, the repeater 50 also rotates, and the center conductor connecting portion 62
May be damaged by the cap screw 32. In order to prevent this, a double nut may be provided on the outer peripheral surface of the intermediate portion of the repeater 50. Alternatively, the insulator 80 and the central conductor connecting portion 62 may be integrated, and the integrated member and the cylindrical body 52 may rotate freely. In this case, when the potato screw 70 is tightened, a part of the potato screw 70 may be prevented from entering the screw hole 74.

FIG. 6 shows a second embodiment. In the first embodiment, when the coaxial cables are cut off at the coaxial cable insertion portions of the two connectors connected to the input terminal 6 and the output terminal 8, respectively, the repeaters are connected to the input terminal 6 and the output terminal 8, respectively. 50 is provided to compensate for the shortening of the two coaxial cables. However, in this case, the repeater 50 must be connected to each of the input terminal 6 and the output terminal 8, and the operation is troublesome. Therefore,
In this embodiment, the length D1 from the tip (the surface on which the male screw portion 54 is formed) of the intermediate portion of the tubular body 52a of the repeater 50a to the other end is set to the length of the body portion 56 of the connector 18. The length is about twice or more the length L (see FIG. 1). The other configuration of the repeater 50a is the same as the repeater 50 of the first embodiment, and the configuration of the tap-off is the same as the tap-off 2 of the first embodiment.

If the repeater 50a is connected to, for example, the input terminal 6 and a connector is connected to the repeater 50, the output terminal 8
Need only be connected to a connector. Conversely, if this repeater 50a is connected to the output terminal 8, the input terminal 6
Only the connector needs to be connected. Therefore, input terminal 6,
There is no need to provide a repeater for each of the output terminals 8, and the mounting operation is facilitated. If the repeater 50a is attached to the input terminal 6 or the output terminal 8 in advance, it is only necessary to attach the connector to the repeater 50a and the input or output terminal to which the repeater 50a is not attached. The installation work is simplified.

In both of the above embodiments, the input terminal 6 and the output terminal 8 have female threads on the inner peripheral surfaces of the cylindrical bodies 14 and 40, so that the outer peripheral portions of the one ends of the repeaters 50 and 50a are provided. A male screw portion is provided on the surface, and a female screw portion is provided on the inner peripheral surface of the other end. However, in the case where the input terminal 6 and the output terminal 8 have a male screw portion on the outer peripheral surface of the cylindrical body, the repeater A female screw portion may be provided on the inner peripheral surface of one end of each of 50 and 50a, and a male screw portion may be provided on the outer peripheral surface of the other end. Further, in the above-described embodiment, the potato screw 70 is used as the pressing means. However, the pressing means is not limited to this, and any other screw that can be rotated by a tool or the like may be used. Good.

[0037]

As described above, according to the coaxial cable repeater of the present invention, a ready-made connector can be used as it is.
Also, there is no need to provide any special configuration on the electronic device side, and a coaxial cable having a reduced length can be connected to the electronic device. According to the electronic device of the present invention,
Since the coaxial cable repeater described above is provided,
By simply connecting a normal connector to the repeater and to the other coaxial cable connection section, even if the length of the two coaxial cables is shortened, this can be compensated for and the installation work is easy. I can do it.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a state where a repeater according to an embodiment of the present invention is connected in a tap-off manner.

FIG. 2 is a perspective view of the tap-off shown in FIG. 1 as viewed from a top surface side.

FIG. 3 is a perspective view of the tap-off shown in FIG. 1 as viewed from the lower surface side.

FIG. 4 is a longitudinal sectional view of the repeater of FIG. 1;

FIG. 5 is a diagram showing an order in which the relays of FIG. 1 are attached to tap-offs.

FIG. 6 is a front view showing a repeater and tap-off according to a second embodiment of the present invention.

[Explanation of symbols]

 2 tap-off (electronic equipment) 6 input terminal (coaxial cable connection) 8 output terminal (coaxial cable connection) 52 tubular body (conductive tubular body) 62 center conductor connection section

Claims (3)

[Claims] 1. An electroconductive device having a first screw portion connectable to a coaxial cable connection portion of an electronic device at one end portion and a second screw portion connectable to a coaxial cable connection connector at the other end portion. A tubular body, disposed inside the tubular body along its length direction, one end protruding outward from one end of the tubular body, and the other end being the other end of the tubular body. A central conductor connecting portion that can be connected to the central conductor of the connector inserted therein from the portion,
For a coaxial cable. 2. The coaxial cable repeater according to claim 1, wherein the other end of the center conductor connecting portion is opened to the other end of the tubular body, and the other end of the center conductor connecting portion is opened from the opening. A coaxial cable having a recess formed along the length direction, having a pressing means for inserting the center conductor of the connector into the recess and pressing the center conductor of the connector against the recess from the side of the recess; Repeater. 3. A main body of the electronic device having a plurality of coaxial cable connection portions on both sides, and a coaxial cable repeater connected to one of the cable connection portions, wherein the repeater includes: A conductive tubular body having a first screw portion connectable to the cable connection portion at one end and a second screw portion connectable to a coaxial cable connection connector at the other end; One end protruding from one end of the tubular body and connected to the central conductor of the one cable connection portion, and the other end is disposed along the longitudinal direction of the tubular body, and the other end is connected to the other end of the tubular body. A central conductor connecting portion connected to a central conductor of a connector for connecting a coaxial cable inserted from the portion, wherein the tubular body has a length not less than about twice as long as a body portion of the connector. Electronic equipment having