JP3057015B2 - Rainproof cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainproof cap for covering a connection portion between a power supply portion of an antenna and a cable connected to the power supply portion so as to prevent rainwater from entering the power supply portion. It is about.

[0002]

2. Description of the Related Art Generally, an antenna for receiving a television broadcast or the like is installed outdoors. In order to guide a received broadcast signal to a receiver installed indoors, the broadcast signal received by the antenna is coaxial. Guided to the receiver via a cable. In this case, the antenna is provided with a power supply unit to which the coaxial cable is connected. To cover.

FIG. 5 shows an example of a conventional antenna of this kind. FIG. 5 shows a satellite broadcasting antenna for receiving satellite broadcasting. The satellite broadcasting antenna includes a parabolic antenna 10 and a converter 11 installed at a focal position of the parabolic antenna 10. An intermediate frequency signal converted by the converter 11 is transmitted to a receiver (not shown) via the coaxial cable 2. Has been. In this case, a flexible waterproof cap 100 is fitted to the lower end of the converter 11, and the connection between the converter 11 and the coaxial cable 2 is covered by the waterproof cap 100.

FIGS. 6 and 7 show the connection between the converter 11 and the coaxial cable 2 in detail.
F-type connector 2-1 is attached to the tip of
The F-type connector 2-1 is screwed into a coaxial connector 11-2 formed at the lower end of the converter 11, and the coaxial cable 2 is attached to the converter 11. A portion of the coaxial connector 11-2 formed at the lower end of the converter 11 to which the F-type connector 2-1 is connected is covered with a waterproof cap 100 shown by a broken line in FIG. As shown in FIG. 7B, the waterproof cap 100 is fitted into a cap mounting portion 11-1 formed near the lower end of the converter 11 in which the coaxial connector 11-2 is formed.

As shown in FIG. 7A, a waterproof cap 100 has a cylindrical portion 100-1 and a cylindrical portion 100-.
1 and a tapered portion 100-3 following the tapered portion 100-2. And
The reduced diameter portion 100-3 is cut at a position indicated by a dashed line where the inner diameter of the reduced diameter portion 100-3 substantially matches the outer diameter of the coaxial cable 2, and the coaxial cable 2 is inserted into the reduced diameter portion 100-3. Then, the F-type connector 2-1 at the end of the coaxial cable 2 is screwed to the coaxial connector 11-2. Then, the cylindrical part 100
-1 is the cap mounting portion 11-1 of the converter 11.
, The coaxial connector 11-2 and the F-type connector 2-1 are covered with the waterproof cap 100, and the connection portion of the coaxial cable 2 can be covered with rainwater. Further, a self-fusing tape is wound around the lower end of the waterproof cap 100.

[0006]

However, the coaxial cable 2 is fixed along the stay supporting the converter 11 as shown in FIG. At this time, the coaxial cable 2 is bent, and if the waterproof cap 100 is not securely fitted to the converter 11 at the time of installation of the antenna, the coaxial cable 2 will be bent when the coaxial cable 2 is bent. Cap mounting part 11-1 and waterproof cap 1
A gap is formed between the water-proof cap 100 and rainwater.

Although the infiltrated rainwater flows below the waterproof cap 100, the coaxial cable 2 is closely fitted to the lower end of the waterproof cap 100.
Since the self-fusing tape may be wound around the lower end of the waterproof cap 100, rainwater accumulates in the waterproof cap 100. Then, there is a problem that the accumulated rainwater rusts a connection portion between the coaxial cable 2 and the converter 11 or causes a contact failure.

Accordingly, an object of the present invention is to provide a rainproof cap that prevents rainwater from collecting inside even when rainwater enters inside.

[0009]

Means for Solving the Problems To achieve the above object, a rainproof cap of the present invention comprises a cylindrical portion, and a flat overlapping portion through a tapered portion following the cylindrical portion. A rainproof cap made of a flexible material into which a cable is inserted and fitted so as to cover a connection portion between the cable and the antenna power supply unit , wherein a lower end of the overlapping portion has a V-shape.
And the cable is inserted through the overlapping portion.
When the overlapping portion is expanded when the
Rainwater that has infiltrated into the polymerization section is discharged from the polymerization section.
It is those that.

According to the present invention, even if rainwater enters the rain-proof cap, the rainwater that has entered the rain-proof cap can be discharged from the lower end. Poor contact with the cable can be prevented.

[0011]

1 (a) and 1 (b) show the construction of an embodiment of a rainproof cap according to the present invention. FIG. 1 (a)
In (b), the rainproof cap 1 is made of a flexible material such as vinyl chloride, and has a cylindrical portion 1-1, a tapered portion 1-2 following the cylindrical portion 1-1, and a flat plate following the tapered portion 1-2. It is composed of an overlapped portion 1-3. The overlap portion 1-3 is formed so that two plates are overlapped, and the lower end thereof is V
It is formed so as to have a character shape. When a force is applied while holding both ends of the overlapping portion 1-3 of the rainproof cap 1 configured as described above with fingers, the overlapping portion 1-3 is expanded, and FIG.
As shown in (b), the coaxial cable 2 indicated by the broken line can be inserted.

The structure of the rainproof cap 1 of the present invention is shown in more detail in FIGS. 2A is a front view of the rainproof cap 1, FIG. 2B is a top view of the rainproof cap 1, and FIG. 2C is a right side view of the rainproof cap, and FIG. () Is a sectional view when the rainproof cap 1 is cut at substantially the center. As shown in FIGS. 2A to 2D, the rainproof cap 1 made of a flexible material includes a cylindrical portion 1-1, a tapered portion 1-2 following the cylindrical portion 1-1, and a tapered portion 1-2. It is composed of the following plate-shaped superposed section 1-3. Polymerization section 1
-3 is formed so that two plates are overlapped at an interval d.

The rainproof cap 1 is applied to a satellite broadcasting antenna as shown in FIG. 5, and a coaxial connector 11-2 of the converter 11 and a coaxial connector 11-2 as shown in FIGS. The connection portion of the F-type connector 2-1 provided at the end of the screwed coaxial cable 2 is covered with the rainproof cap 1. Accordingly, rainwater can be prevented from entering the rainproof cap 1 by the rainproof cap 1, and the coaxial connector 11-2 and the F
The connection portion with the mold connector 2-1 can be protected from rainwater.

For example, when rainwater falls on the outer surface of the rainproof cap 1, since the rainproof cap 1 is made of water-repellent vinyl chloride or the like, as shown in FIG. 1 and flow down the surface of
It falls from the tip of the letter shape. As a result, rainwater does not enter the rainproof cap 1. Further, even if the upper end of the rainproof cap 1 is not completely fitted to the cap mounting portion 11-1 of the converter 11, even if rainwater enters the rainproof cap 1 from the gap at the upper end of the rainproof cap 1. The infiltrated rainwater is discharged downward from the gap between the overlapping portion 1-3 of the rainproof cap 1 and the coaxial cable 2. That is, even if rainwater infiltrates into the rainproof cap 1, it is drained from the rainproof cap 1 and the connection between the coaxial connector 11-2 and the F-type connector 2-1 can be protected from rainwater. Become like in this case,
Since the tip of the overlapping portion 1-3 is V-shaped, the opening area thereof can be large, and the rainwater is drained out without causing a drainage impossible state due to surface tension.

When installing the antenna, the rainproof cap is inserted into the coaxial cable 2 and the rainproof cap is moved to a predetermined position, and the rainproof cap is attached to the cap mounting portion 11-1 of the converter 11. Are fitted. At this time, in the conventional waterproof cap 100, since the reduced diameter portion 100-3 at the lower end of the waterproof cap 100 is in close contact with the coaxial cable 2, the frictional force is large, and the waterproof cap 100 is It was difficult to move.

In the present invention, this is solved as follows. Coaxial cable 2 with rainproof cap 1
When the rainproof cap 1 is to be moved upward with respect to the coaxial cable 2 by inserting the lower end of the overlapping portion 1-3 of the rainproof cap 1 with only the width D2 as shown in FIG. It comes into contact with the coaxial cable 2. For this reason, the rainproof cap 1 can be easily moved upward. When the rainproof cap 1 is to be moved downward with respect to the coaxial cable 2, as shown in FIG.
Is bent so that the inner surface of the overlapped portion 1-3 has a width D1.
To come into contact with the coaxial cable 2. For this reason, it becomes difficult to move the rainproof cap 1 downward, and it is possible to prevent the rainproof cap 1 from sliding downward during antenna installation work.

As described above, in the case of the rainproof cap 1 of the present invention, the contact area between the inner surface of the overlapping portion 1-3 of the rainproof cap 1 and the coaxial cable 2 is increased as shown in FIG. Since it decreases when moving, and increases when moving downward, the rainproof cap 1 can be easily moved upward with respect to the coaxial cable 2 and does not easily move downward. Therefore, the rainproof cap 1 can be easily attached at the time of antenna installation work.
In addition, changing the shape of the lower end of the overlapping part 1-3 to a V-shape,
It may be U-shaped. In short, the shape of the lower end of the overlapping portion 1-3 may be formed to be thinner as it goes forward.

[0018]

As described above, the present invention is constructed as described above, so that the rain protection cap can protect the power supply portion of the antenna and the portion of the cable connected to the power supply portion from rainwater. Moreover, even if rainwater enters the rainproof cap, the rainwater that has entered from the rainproof cap can be drained from the lower end, preventing rust from occurring on the power supply section and poor contact with the cable. can do. Furthermore, at the lower end of the rainproof cap, there is no need to wind the self-fusing tape over the coaxial cable inserted,
This eliminates the need for a self-fusing tape and reduces the number of winding operations.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of a rainproof cap of the present invention.

FIG. 2 is a front view, a top view, a right side view, and a cross-sectional view showing the configuration of the rainproof cap of the present invention.

FIG. 3 is a view for explaining the operation of the rainproof cap of the present invention.

FIG. 4 is a view for explaining a case where the rainproof cap of the present invention slides with respect to a coaxial cable.

FIG. 5 is a diagram showing a configuration of a satellite broadcasting antenna provided with a conventional waterproof cap.

FIG. 6 is a diagram showing a configuration in which a conventional waterproof cap is attached to a converter of a satellite broadcasting antenna.

FIG. 7 is a diagram for explaining attachment of a conventional waterproof cap to a converter of a satellite broadcast antenna.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rain-proof cap 1-1, 100-1 Cylindrical part 1-2, 100-2 Taper part 1-3 Overlapping part 2 Coaxial cable 2-1 F-type connector 3 Water 10 Parabolic antenna 11 Converter 11-1 Cap mounting part 11 -2 Coaxial connector 12 Post 100 Waterproof cap 100-3 Reduced diameter part

Continuation of the front page (56) References JP-A-60-50466 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 13/52

Claims (1)

(57) [Claims] The present invention comprises a cylindrical portion and a flat overlapping portion via a tapered portion following the cylindrical portion. A cable is inserted into the overlapping portion so as to cover a connecting portion between the cable and the antenna feed portion. rainproof cap consisting fitted is a flexible material to
A flop, the lower end of the overlapping portion is formed in a V shape, said heavy
When the cable is inserted through the joint, the overlapping portion expands.
By being opened, the rainwater that has entered inside
A rainproof cap characterized by being discharged from a part .