JPH02280620A - Cylindrical protector - Google Patents

Abstract

PURPOSE:To facilitate connector connection and protector connection works by providing end connections of connector on the station side and on the customer station side connected to a protector respectively to both ends of a cylinder body. CONSTITUTION:A cylinder body 1, the envelope of a protector, is composed of a long and narrow cylindrical body which opens at both ends. An opening section at an end of the cylinder body 1 is fitted close with a cap 2, while an opening section at the other end is also fitted close with a cap 3. A coaxial cable connector 4 on the customer station side is inserted into the inserting hole of the cap 2 and a coaxial cable connector 5 on the station side is inserted into an inserting hole 10 of the cap 3. The inner conductors 4b and 5b are thereby face to face state mutually on the axis of the cylinder body. In this connection, a protecting element 6 is arranged, which is fixed with brackets 7 and 8.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a cylindrical protector for CATV and the like.

Conventional technology Telephone subscriber protectors, CATV protectors, etc. are installed to protect equipment and the human body from lightning surges, high voltage contact, etc. For example, conventional CATV protectors are As typified by No. 48651, a cup-shaped lid is fitted onto a base board on which safety elements such as lightning arresters are mounted, and the in-house connector and office-side connector are directly attached to the base board side by side. Protrude toward the bottom surface of the board, install it outdoors under the eaves, etc., guide the coaxial cable terminals on the office side and inside the building to the bottom surface of the base, connect them to both connectors, respectively, and connect the mounting plate connected to the base as follows. We are working on attaching it to the outside wall of the house using nails.

Problems that the invention aims to solve However, the above-mentioned protector is introduced by bending both the coaxial cables on the central office side and the inside of the premises to the bottom of the base.

Because it is a lead-out structure, there is a drawback that both cables have a limit in bending and must be routed by making a large detour.
Both cables must be concentratedly routed in a limited space on the bottom of the base, occupying a large amount of cable wiring space, and the work of connecting both coaxial cables to the connector becomes extremely time-consuming and complicated.

In addition, conventional protectors have a structure in which both connectors are placed side by side at a predetermined distance on the base, and both cables are centrally wired and connected to the bottom of the base, so the width and diameter of the base and case are inevitably large. Unavoidably, this method has the drawback that it occupies a large amount of space for installing the protector in addition to the above-mentioned wiring space.

The present invention has been conceived in consideration of the above-mentioned circumstances, and it is an object of the present invention to provide a protector that can be suitably implemented for telephone subscribers and CATV, which solves the above-mentioned problems.

Means for Solving the Problems According to the present invention, as a means for solving the above-mentioned problems, the envelope of the safety device is formed of a cylindrical body that is open at both ends, and one end of the cylindrical body is opened at one end. and the other end opening with caps, and one cap is fitted with a connector for connecting the coaxial cable inside the premises, and the other cap is fitted with a connector for connecting the coaxial cable on the central office side, and both connectors are connected to the above-mentioned cylindrical body. The two connectors are arranged so as to face each other in the axial direction, and are connected to the safety element mounting board built into the cylinder at one end of both connectors, which protrude inwardly from the cap, and protrude outwardly from the cap in opposite directions. The connector is configured to connect to each of the coaxial cables at the other ends of both connectors.

Operation In the present invention, as described above, the protector is connected to the office side and the premises side coaxially by using the connector connection ports on the office side and the premises side that protrude in opposite directions from the caps at the openings at both ends of the cylindrical body which is the main body of the protector. It can be connected to the cable and the protector is grounded.

Therefore, it is possible to conduct smooth connection wiring without complicating the wiring by guiding the installed coaxial cables on the office side and on the inside of the premises, which are normally located on opposite sides, to each end face of the cylinder. This effectively solves the problem described above when centrally wiring both cables by detouring them to the bottom surface of the base, and the protector can be easily connected to each of the coaxial cables, making the protector installation work much easier. Become.

Also, as mentioned above, the coaxial cable on the home side is connected using the connector connection port protruding from the cap on one end of the cylindrical body, and the coaxial cable on the central office side is connected using the connector connection port protruding from the cap on the other end of the cylindrical body. Since both coaxial cables are connected with the same path as the Hanan device cylinder, the wiring space for the installed cable is minimized, and the connector can be attached to the conventional protector base. The cylindrical body that is the main body of the protector can be made as small as possible without increasing the size or width of the protector, such as a protector that is installed in parallel to guide and connect both coaxial cables to the bottom of the base. Space can be reduced.

Further, while removing the cap, the connector and safety element mounting board can be pulled out together with the cable for maintenance and inspection, or to be assembled, thereby simplifying the structure and simplifying the assembly.

EXAMPLES Hereinafter, examples of the present invention will be explained based on FIGS. 1 to 6.

A cylindrical body 1 is used as an envelope constituting the main body of the protector. The cylindrical body 1 consists of a slightly elongated cylindrical body that is open at both ends, and the opening at one end of the cylindrical body 1 is fitted with a removable cap 2, and the opening at the other end is removable. Close it with the cap 3. The cylinder above! and the cap 2.3 is made of an electrical conductor, preferably aluminum or an aluminum alloy.

Reference numeral 4 denotes a connector for connecting the inside coaxial cable, and 5 denotes a connector for connecting the coaxial cable at the central office side.The connector 4 for connecting the inside coaxial cable is inserted into the connector insertion hole 9 made approximately at the center of one of the caps 2. At the same time, the central office side coaxial cable connecting connector is inserted into the connector insertion hole 10 formed approximately at the center of the other cap 3, and in this inserted state, both the connectors 4.5 are aligned with the cylinder axis line. The two sides are facing each other.

Both coaxial cable connectors 4.5 have outer conductors 4a and 5m formed of a screw cylinder with a female thread on the outer circumferential surface, and an inner conductor 4b in the center thereof.

5b, and has a rod shape as a whole. By inserting both coaxial cable connectors 4.5 into the center of the cap 2.3, the inner conductors 4b, 5b
In addition to cases in which the two coaxial cable connectors are arranged to face each other on the axis of the cylinder 1 strictly on the axis of the cylinder, for example, one coaxial cable connector may be placed in the center of the cap depending on the design. and the other coaxial cable connecting connector is inserted in a position eccentric from the center of the cap, or both coaxial cable connecting connectors are inserted in eccentric positions of the cap so that the amount of eccentricity is different. By doing so, they are opposed in the axial direction of the cylinder.

By inserting both the coaxial cable connecting connectors 4.5 into the cap 2.3 and arranging them facing each other as described above, one end (opposite side end) of both the coaxial cable connecting connectors 4.5 is connected to the cap 2.3. The safety element mounting board 6 is made to protrude into the cylindrical body 1 and connected to the safety element mounting board 6 inserted into the cylindrical body 1, and the safety element mounting board 6 is horizontally hung between both coaxial cable connecting connectors 4 and 5 disposed inside. The connectors 4.5 are configured to form a circuit, and the other ends of both connectors 4.5 are made to protrude from the caps 2, 3 to the outside of the cylinder 1 in opposite directions to connect with the in-home coaxial cable 16 and the office-side coaxial cable 17. composition.

As a means for horizontally mounting the safety element mounting board 6, a circuit board is formed with a required grounding or line wiring pattern on the surface of an insulating board, and the circuit board is used as the safety element mounting board 6 at one end and the other end. Attach bracket 7.8 to. The bracket 7.8 is made of an L-shaped conductive member, and one end of the bracket 7.8 is attached to the safety element mounting board 6 with rivets 11 or screws, and the other end is attached to the safety element mounting board 6.
Standing upward, one end of the connector 5 for connecting the central office side coaxial cable is inserted and supported into the connector insertion hole 12 drilled in the upright part of one bracket 8, and the internal conductor 5b is projected onto the security element mounting board 6. The connector 5, the board 6, and the cap 3 are integrated by tightening the nut 13 which is screwed onto the outer conductor 5a.

Similarly, one end of the connector 4 for connecting the inside coaxial cable is inserted and supported into the connector insertion hole 14 made in the upright part of the other bracket 7, and the internal conductor 4b is made to protrude onto the safety element mounting board 6 to connect the safety element. The connector 4, the board 6, and the cap 2 are integrated by tightening with a nut 15 that is screwed into the outer conductor 4a.

In addition to mounting the safety element mounting board 6 on the connectors 4.5 arranged facing each other as described above, for example, by removing the nut 13 on the outside of the cap 3 and disconnecting the coaxial cable 1, both connectors 4.5 and the safety element are mounted. The assembly of the substrate 6 can be taken out of the cylinder l together with the cap 2.

Further, the station side coaxial cable connecting connector 5 is attached by tightening the nut so that its outer conductor 5a is electrically connected to the cap 3 and the cylindrical body 1, and is also connected to the safety element mounting board 6 via the bracket 8 and the stud 11. It is brought into conduction with the grounding wiring pattern 6a formed on the surface.

On the other hand, the connector 4 for connecting the indoor coaxial cable is floated (attached in an electrically non-conducting state) with respect to the cap 2 and the cylinder 1. As a means for this, an insulating collar 18 is fitted into the connector insertion hole 9 of the cap 2. and the insulation collar 18
The above-mentioned indoor coaxial cable connection connector 4 is inserted through the
It is integrally assembled with the cap 2 in an insulated state, and the bracket 7 is attached to the wiring pattern of the safety element mounting board 6 in a non-conductive state.

The safety element mounting board 6 may be formed of a conductive plate, and brackets 7.8 may be bent and formed on both ends of the conductive plate to form a single component. In this case, the board functions as a grounding plate, and the safety element connects the line through an insulator placed on the board, or conversely, the bracket 7.8 and the safety element mounting board 6 are formed of an insulating board, The above-mentioned earth connection or line connection is performed using the line and ground wiring patterns formed on the surface.

The safety element mounting board 6 includes safety elements forming a safety circuit, such as a lightning arrester ARR, a coil, an eight bus filter-HPF, and coupling capacitors C, C, depending on the circuit design.

etc. will be implemented.

In detail, one electrode of the lightning arrester ARR is connected to the internal conductor 5b.
The other electrode is connected to the outer conductor 5a of the local coaxial cable connector 5, one end lead of the coil L is connected to the inner conductor 5b, and the other end lead is connected to the safety element mounting board 6. Connect to the grounding wiring pattern 6a, and connect one end lead of the coupling capacitor 〇 to the center conductor 5b.
Then, connect the other end leads to the line wiring pattern 6b formed on the surface of the board 6, and further connect one end lead of the bypass filter HPF to the line wiring pattern 6a and the other end lead to another line wiring pattern 6C. One end lead of the coupling capacitor C7 is connected to the line wiring pattern 6C, and the same ground lead is connected to the internal conductor 4b of the connector 4 for connecting the inside coaxial cable. As a result, the safety circuit shown in FIG. 6 is formed.

In this embodiment, a ring capacitor C is further added to the above circuit.
Add 3. The insertion of the annular capacitor C5 was considered to be extremely effective in terms of noise resistance against incoming radio waves from the outside and leakage electric field properties that prevent self-generated interference radio waves. This figure shows a means for rationally forming an intended circuit into a cylindrical protector of the structure.

The annular capacitor C5 has a through hole 19c in the center, and an inner annular electrode 19a is arranged on the inner peripheral surface of the through hole, and an inner annular electrode t9a is arranged on the outer peripheral surface of the annular capacitor C5 so as to be concentric with the inner annular electrode 19a. The annular capacitor C3 is inserted through the through hole 19c of the connector 4 for connecting the indoor coaxial cable which is inserted into the cap 2, and the inner annular capacitor C3 is inserted into the connector 4 through the through hole 19c. While bringing the electrode 19a into contact, a conductive ring 20 is fitted to the end of the outer annular electrode 19b, and the conductive ring 20 is brought into contact with the cap 2, and the inside coaxial cable is connected to the bracket with the nut 15. 4, the annular capacitor C3, and the cap 2 are tightened together.

According to the above, the outer annular electrode 19b of the annular capacitor C3
is grounded to the enclosure that functions as a grounding device, that is, the cap 2 and the cylinder 1, and around the external conductor 4a of the indoor coaxial cable connection connector 4, between the external conductor 4a and the grounding enclosure. A state similar to that of arranging countless capacitors without interruption can be rationally formed.

By arranging the annular capacitor C5, the impedance mismatch in the in-house coaxial cable connection connector 4 is reliably eliminated, effectively preventing interference with CATV caused by incoming radio waves from outside, and guaranteeing a high picture award. , accurately prevents the generation of own interference radio waves, and effectively prevents interference with external equipment.

The annular capacitor C5 has an annular electrode 19a in its radial direction.
,! 9b, but even if a ring plate-shaped ring capacitor with ring electrodes on the front and back sides is used, the ring capacitor can be placed around the inside coaxial cable connector 4 at the center. A state surrounded by electrodes can be formed. In this case, by tightening the nut 15, the front annular electrode can be connected to the external conductor 4a of the connector 4, and the back annular electrode can be grounded to the cap 2, as described above.

Reference numeral 21 denotes an earth band which also serves as an attachment for the cylinder 1. The earth band 21 has a substantially semi-circular arc shape and has threaded seat pieces 21a at both ends. Attach and fix the screwed cylinder 1, that is, the cylindrical safety device, to a wall or the like through the mounting hole drilled in the front seat piece 21a, and connect the M#4 screw 23 to the screw 22 to connect the ground wire. will be carried out.

The indoor coaxial cable 16 is connected to the end of the connector 4 that protrudes from the cap 2 of the cylindrical protector as described above, and the office side coaxial cable 17 is connected to the end of the connector 5 that protrudes from the cap 3. As a result, the cylindrical protector is arranged so that the axis of the cylindrical body 1 faces the axial direction of both cables.
6.17.

Reference numerals 24 and 25 denote boots that are press-fitted onto both cable connection tabs and both ends of the cylindrical body 1 of the cylindrical protector when the cylindrical protector is connected with the cable. The boots 24, 25 are made of flexible synthetic resin tubes, and have a cylindrical body 1 at one end.
Protector 1 opening 24a that covers the end side where the cap 2 is fitted
, 24a are provided with one cable port 24b, 25b covering the cable connection end at the other end, and by covering the boot 24.25, the cylindrical protector is integrated on the extension line of both cables 16.17. Installation, watertight installation is ensured. In this state, the earth band 21 is used to attach it to a wall or the like. Further, as described above, both cables 16, 1 are not forced to bend at all, and the cylindrical protector can be installed and connected in a limited space in the diametrical direction of the cables.

In addition, as another means of attaching the cylindrical protector to the wall of a building, etc., as shown in FIG. Support line 2 that can extend integrally and parallel to the coaxial cable 17
7 in the axial direction of the cylinder and grip it, and the support wire 2
The end portion of the wire is fixed to a wall or the like at the wire fastening portion 28.

For example, the wire clamp 26 is provided with a wire seat 29 having a groove 32 through which the support wire 27 is passed, integrally with the cylindrical body 1, and a wire holding fitting 3o is tightened to the cylindrical body 1 with a screw 31. The structure is such that the support wire 27 is held between the wire holding member 30 and the wire holding fitting 30. The wire clamp 26 and the cylindrical body 1 can be integrally manufactured by aluminum die-casting or the like.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, the protector is normally connected by using connector connection ports on the office side and the home side that protrude in opposite directions from the caps at the openings at both ends of the cylindrical body that is the main body of the protector. The installed coaxial cables on the central office side and the residential side, which are on opposite sides, can be guided to each end face of the cylindrical body for smooth connection wiring in the direction of cable extension, and connector connections for each of both coaxial cables can be made. The work of connecting the protector becomes extremely easy, and the cable wiring does not become complicated as in the past.

Also, as mentioned above, the coaxial cable on the home side is connected using the connector connection port protruding from the cap on one end of the cylindrical body, and the coaxial cable on the central office side is connected using the connector connection port protruding from the cap on the other end of the cylindrical body. Since both coaxial cables and the protector cylinder are connected in the same way, the wiring space for the installed cable is minimized, and the connectors can be placed side by side on the conventional protector base. Unlike a protector that connects coaxial cables to the bottom of a base by installing a protector, the outer shape or width of the protector does not increase, and the cylindrical body that is the main body of the protector can be made as small as possible, which saves installation space. can be reduced.

Further, while removing the cap, the connector and safety element mounting board can be pulled out together with the cable for maintenance and inspection, or to be assembled, thereby simplifying the structure and simplifying the assembly.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a protector showing an embodiment of the present invention;
Figure 2 is a side view of the protector covered with a boot;
The figure is a front view of the earth band, FIG. 4 is a perspective view showing the safety element mounting board taken out from the cylinder, FIG. 5 is a sectional view of the protector, and FIG. 6 is a circuit diagram of the protector. DESCRIPTION OF SYMBOLS 1... Cylindrical body, 2.3... Cap, 4... Connector for connecting the axial cable between the inside of the premises, connector for connecting the coaxial cable on the 5th river station side, 4a, 5a... External conductor, 4b. 5b...Inner conductor, 6...Safety element mounting board, 6a
... Wiring pattern for grounding, 6b, 6c... Wiring pattern for track, 7, 8... Bracket, 9, 1o...
Connector insertion hole, 16...Inside coaxial cable, 17
... Station side coaxial cable, 21 ... Earth band, 2
4゜25...Boot, C5...Annular capacitor. Patent applicant Meguro IT Machine Manufacturing Co., Ltd. Matsushita Electric Industrial Co., Ltd. Agent Patent attorney Takashi Nakahata! '-,4,-
Relationship to Japanese Patent Application No. 1-103081, Case of Person Amending the Name of the Invention, Cylindrical Safety Device Patent applicant August 24, 1999 (1) Submit a power of attorney as shown in the attached sheet. (2) On the third line of page 18 of the specification, next to "...Circuit diagram", "Figure 7 is a side view showing the protector suspended by the support wire of the cable, and Figure 8 is the same. Add the description "Front view".

Claims (1)

[Claims] A cap is removably fitted into each opening of the cylindrical body, which is open at both ends, and a connector for connecting the coaxial cable inside the premises is inserted into one cap, and a connector for connecting the coaxial cable at the office side is inserted into the other cap. The two connectors are arranged so as to face each other in the axial direction of the cylindrical body, and one end of each connector protrudes from each of the caps into the cylindrical body to mount the safety element built into the cylindrical body. A cylindrical protector characterized in that it is connected to a circuit board, and has the other end protruding from each of the caps in opposite directions to the outside of the cylindrical body to be connected to an in-house coaxial cable and an office-side coaxial cable.