JPS5833652Y2 - Waterproof structure of transmission line connections in CATV equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a waterproof structure for a transmission line connection part in CATV equipment such as an amplifier, a brancher, or a distributor installed outdoors in a CATV facility.

In the conventional waterproof structure, the waterproof cap was fixed to the housing so as to cover the transmission line connection part.
There is a drawback that rainwater passes through the stopper due to capillary action and enters the connection part, destroying the insulation of the connection part.

Therefore, the present invention is designed to eliminate the above-mentioned drawbacks.
It is an object of the present invention to provide a waterproof structure that can cut off rainwater that tends to flow from a housing to a connection part of a transmission line and maintain good insulation of the connection part.

The drawings showing the embodiments of the present application will be described below.

In the housing, 1 is a base body, which is usually manufactured by molding a metal material such as an aluminum alloy.

Reference numeral 2 denotes a mounting portion, which is provided so that the base body 1 can be mounted on a messenger wire, a utility pole, or the like.

Reference numeral 3 denotes a joining piece, which has a punch hole in its lower surface (not shown).

Reference numeral 4 denotes a lid body, which is manufactured in the same manner as the base body 1.

5 is a joining piece, and 6 is a fixing screw, which is screwed into the screw hole of the joining piece 3 while the lid body 4 is joined to the base body 1, as shown in FIGS. 1 and 2. It is provided to fix the two together.

Reference numerals 7 and 8 denote receptacle mounting portions, and 9 an F-type receptacle exemplified as a transmission line connector, which is mounted so as to protrude downward from the lower wall of the housing, as shown clearly in FIG.

Note that this transmission line connector may have various shapes and structures depending on the purpose.

Reference numeral 10 denotes a transmission line, which is generally arranged to transmit and receive high frequency signals such as television signals to and from other devices using a coaxial cable.

A connector 11 is provided to connect the transmission line 10 to a receptacle.

Next, 12 is a printed circuit board on which various circuits such as an amplifier circuit, a branch circuit, or a distribution circuit are formed, and is used depending on the purpose.

Reference numeral 13 indicates a seat for fixing the printed circuit board. Next, 14 is the lid body 4
A concave groove 15 formed in a portion facing the base body 1 in is a gasket fitted into the concave groove 14, and is provided so as to be in close contact with the base body 1 to waterproof the inside of the housing.

Reference numeral 16 denotes a hanging piece that allows rainwater falling on the top surface of the base 1 to be absorbed by the base 1.
It is provided so that it does not invade the opposing portion of the lid body 4.

Reference numeral 17 denotes a drainage portion, which has a groove-like recess as shown in FIGS. 1 and 4, and is formed so as to surround the receptacle 9.

Reference numeral 18 indicates a waterproof tape wrapped around the connection between the transmission line connector 9 and the transmission line 10, and generally a self-fusing tape is used.

Reference numeral 19 denotes a waterproof cap that is used as needed, and its tip is inserted into the draining section 17 for use.

In this case, there is a slight space between the outer periphery of the tip and the wall surface of the groove-shaped drainage part.

With the above configuration, when it rains while the housing is installed outdoors, the rainwater flows down the outer surface of the housing and falls to the bottom surface.

On the lower surface of the housing, even if the rainwater that has fallen tries to flow toward the receptacle 9, the groove-shaped drainage section 17 is formed around the receptacle 9, so that the rainwater will not flow up the outside side surface. However, the water cannot reach the receptacle 9 side, and falls as water droplets at a location outside the drain section 17.

As described above, in this invention, since a groove-shaped recess is formed around the transmission line connector 9 on the lower wall surface of the housing, the connector 9 and the recess are formed around the transmission line connector 9. When covering the connected transmission line 10 with the waterproof cap 19, this concave portion is used as a mounting portion for the cap, so that the cap can be mounted reliably and easily.

Moreover, the cap 19 was attached just like that.

In this case, even if rain falls horizontally during rain, the waterproof cap 19 can prevent the rain from falling on the connector 9 or the connection between it and the transmission line 10. This has the effect of preventing failures such as corrosion, poor connections, and insulation breakdown.

Furthermore, in this state, even if rainwater flows along the outer surface of the housing (from the top surface to the side surface to the bottom surface) and flows close to the waterproof cap 19, the outer wall surface of the recess and the outer peripheral surface of the upper end of the waterproof cap 19 Since there is a space left between them, even if rainwater flows as described above, it can be turned into water droplets and dropped when it reaches that space, which prevents water from entering the inside of the waterproof cap 19. It also has the effect of preventing seepage and more reliably preventing the above-mentioned failures.

Furthermore, since the device of the present invention has a concave portion surrounding the connector 9 as described above, it is assumed that the waterproof cap 19 is
Even if the connector pulls out from the recess, the four parts can block rainwater flowing along the lower surface of the housing from heading toward the connector 9. In this case, the connector 9
This has the effect of preventing water from becoming flooded and causing the type of failure described above.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a half-sectional front view of the housing (cross-sectional view taken along line I-I in FIGS. 3 and 4), FIG. 2 is a left side view, and FIG. 4 is a plan view, and FIG. 4 is a bottom view of the lid. 9... Transmission line connection tool, 10... Transmission line, 17... Bent drain section.

Claims (1)

[Scope of utility model registration request] A transmission line connector with a transmission line connected to the lower part is attached to the lower wall of the housing, and a concave groove-shaped recess is provided around the location of the transmission line connector on the lower surface of the housing. A cylindrical waterproof cap is formed to surround the transmission line connector and the transmission line connected to the transmission line connector, and a cylindrical waterproof cap is positioned to surround the transmission line connector and the transmission line, The upper end of the waterproof cap is inserted into the recess, and with a space formed between the outer peripheral surface of the upper end of the waterproof cap and the outer wall surface of the recess, the inner peripheral surface of the upper end of the waterproof cap is inserted into the inner peripheral surface of the recess. A waterproof structure for a transmission line connection part in CATV equipment, characterized in that the lower end of the waterproof cap is brought into contact with a wall surface, and the inner peripheral surface of the waterproof cap is aligned with the outer peripheral surface of the transmission line.