JPS59194579A - Catv power source device - Google Patents

Abstract

PURPOSE:To make a wiring work simple, safe and durable by incorporating as one body a breaker, a voltage dropping transformer, etc. in order to obtain an AC of 30V from a pole transformer. CONSTITUTION:A case body 7 and a cover are constituted so as to be enclosed airtightly by an ''O''-ring 20, and in this amplifier case, a partition plate 23 for dividing the inside of the case into the first chamber 21 and the second chamber 22 is provided in parallel to a direction facing a vertical direction after the installation. An insulating substrate 24 is attached to the first chamber 21, and a breaker 1 is fixed. A voltage dropping tansformer 2 is fixed to the second chamber 22. A through-hole is provided on the lower face of the first chamber, and a power source wire 31 drawn out of a pole transformer is inserted, and connected to the breaker 1. A through-hole is provided on the lower face of the second chamber, too, and a feeder 33 for outputting an AC 30V is drawn out of the transformer 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a CATV power supply device that supplies power to drive a CATV system.

[Technical background of the invention]

Generally, in a CATV system, 1oOV commercial power is stepped down to 30V and transmitted using the center conductor and outer conductor of a coaxial cable, and the voltage is converted to DC for each relay amplifier and used to drive the amplifier, etc. This device for obtaining a reliable 30V AC power source is attached to utility poles at appropriate locations depending on the power demand of the system.

[Problems with background technology]

In such a system, the pole transformer J) 30
In order to obtain an alternating voltage of V, a power supply device that incorporates a breaker having an overcurrent protection function, a step-down transformer, etc. in three dimensions is desired, but it has not yet been put into practical use from a safety standpoint.

[Purpose of the invention]

The present invention has been made with attention to the above points, and an object of the present invention is to provide a safe and robust CATV power supply device with simple wiring work.

[Embodiments of the invention]

An embodiment of the wiring diagram of the device of the present invention is shown in FIG.

A 100V power source branched from the pole transformer is connected to a step-down transformer 2 via a breaker 1 having a built-in relay for overcurrent protection. On the primary side of this step-down transformer 2,
An arrester 3 and a heater 4 for circuit protection are inserted. Further, AC 30V is outputted from the secondary side, and a light emitting diode 5 and its driving circuit 6 are connected in parallel to the circuit for displaying the output.

FIG. 2 is a front view showing the appearance of the apparatus of the present invention, FIG. 3 is a side view thereof, and FIG. 4 is a bottom view thereof.

In this device, it is installed via a bearing lO on the side of the case similar to that used in CATV amplifiers for reasons of identification, ease of handling, and cost and because it is for CATV systems. Rotate like 11. A grounding terminal 12 is provided on the side surface of the main body, and a through hole is provided on the bottom surface through which a power line 13 and a power supply line 14 (described later) are passed. Further, a window 19 for seeing through the light emitting diode is provided on this surface.

A pedestal 15 is fixed to the back side of the case body 7, into which a band for tying the case to a telephone pole is inserted. A band is inserted into this base 15, for example, as shown by the dashed line 16 in FIGS. 3 and 4. If the diameter of the utility pole is small, the band is inserted through it as shown by the dashed line 17 in FIG. The pedestal 15 has an insertion hole 1 into which the band is inserted.
8 are provided in a total of four locations.

FIG. 4 is a front view showing the internal structure of the device of the present invention.

The case body 7 and the lid 8 are configured to be hermetically sealed with an O-ring 20.

Inside this amplifier case, after installation, there is a first chamber 21 parallel to the vertical direction (vertical direction in the paper), and a first chamber 21 inside the case.
A partition plate 23 is provided that divides the chamber into a second chamber 22 (left-hand chamber) and a second chamber 22 (right-hand chamber).

An insulating substrate 24 is attached to the tenth chamber 21, and the breaker 1 is fixed thereon. A step-down transformer that steps down the voltage from 100V to 30V is fixed in the center of the 20th chamber 22, a fuse box 26 and a spare fuse holder 27 are attached to the upper panel 25, and a table displaying predetermined standards, etc. is attached to the lower panel 28. A board 29 is attached.

Further, a through hole is provided in the first chamber lower surface 30, through which a power line 31 drawn out from the pole transformer is inserted and connected to the breaker 1. This power supply line 31 is wound around a two-way amplifier 32 near the through hole. A through hole is similarly provided in the lower surface of the second room, and a power supply line 33 that outputs 30 V AC is led out from the transformer 2.

The arrangement of the shim plate 23 and each component will be explained with reference to the perspective view of the chassis shown in FIG. 6.

The shield plate 23 is made of a metal plate such as an iron plate, and is bent as shown in FIG. Breaker 1 is this board 23
It is fixed to an insulating substrate 34 made of plastic or the like with screws. fuse 26, spare fuse holder 27
The light emitting diode 5 and its driving circuit 6 are attached to a jig plate 35 fixed to the back of the case body.

FIG. 7 is a sectional view of the power line clamp and the vicinity of the through hole in the case.

In the figure, the power supply line 31 is shown by a dashed line. An O-ring 38 is fitted into the base of the screw of the sleeve 37 screwed into the case from below, thereby maintaining watertightness between the sleeve 37 and the bottom surface 30 of the case. Further, a vinyl tape 39 is inserted into the shaft portion of this sleeve 37 with both ends protruding in the vertical direction.The O power supply wire 31 is inserted from below this sleeve 37 and is connected to a substantially T-shaped clamp 32. It is wound around and guided to breaker 1. When the power wire 31 wound around the clamp arm 40 is pulled downward, the clamp shaft 41 is inserted into the vinyl tube 39 and settled in a stable position. This clamp 32 is made of an insulating plate such as a plastic plate.

FIG. 8 is a perspective view of the sleeve.

〔Effect of the invention〕

The CATV power supply device of the present invention having the above configuration has the following effects.

1) Since a CATV amplifier case is used, opening, installation, maintenance and inspection, etc. are easy.

2) The inside of the case is partitioned with a υ board, electrically shielding the breaker from other equipment, making maintenance and use highly safe. 03) Using clamps to connect power lines easily and securely power distribution work is easy and highly reliable.

4) Highly waterproof as both the power line and feeder line are drawn out from the bottom of the case.

Note that the above-mentioned shield plate may have any shape as long as it can electrically isolate the chamber housing the breaker.

It goes without saying that the clamp can be of various shapes, such as a T-shape, a Y-shape, or an inverted shape.

[Brief explanation of drawings]

Fig. 1 is a wiring diagram of an embodiment of the device of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a side view, Fig. 4 is a bottom view, Fig. 5 is a front view showing the internal structure, and Fig. 6 is a front view. The figure is a partial perspective view of the chassis, FIG. 7 is a sectional view of the clamp and the vicinity of the through hole, and FIG. 8 is a perspective view of the sleeve. 1...Breaker 2...
・・・・・・・・・・・・Step-down transformer 7.8・・・・・・
...CATV amplifier case 21...
・・・・・・First room 22・・・・・・・・・・・・
...20th room 23......Shiki υ board 31......Power line 32
・・・・・・・・・・・・・・・Clamp 33・・・・
・・・・・・・・・・・・Feeder line 34・・・・・・・・・
・・・・・・Insulating board Figure 5

Claims (1)

[Claims] A CATV amplifier case, a sill board provided in the case in a substantially vertical direction and dividing the inside of the case into a first chamber and a second chamber, and a plate fixed on an insulating substrate in the first chamber. a step-down transformer fixed in the second chamber; a power line connected to the breaker through a through hole provided on the lower surface of the first chamber; and a power line connected to the breaker near the through hole. A CATV power supply device comprising: a clamp for winding and fixing; and a power supply line connected to the transformer through a through hole provided on the lower surface of the second chamber.