JPH0756489Y2 - Structure of front end of primary radiator for satellite broadcasting reception - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a front end portion (on a primary horn side) of a primary radiator in which a primary horn and a converter of a satellite broadcasting receiving antenna are integrated.

[0002]

2. Description of the Related Art In this type of primary radiator, the cap for ensuring the watertightness of the primary horn appearing on the horn projection is prevented from being accidentally removed by the user. As shown in FIG. 5, a cap 53 is screwed onto a threaded portion 52 formed on the front outer peripheral surface of the horn protrusion 51. And ho
The portion of the flange portion 54 projecting near the rear portion of the protruding portion 51, which is detached from the cap 53, and the front end portion of the exterior case 58 into which the flange portion 54 is fitted, are the cylindrical cap 5
The appearance is improved by covering it with the exterior body 55 fitted in 3.

[0003]

However, since the cap 53 and the horn protrusion 51 are screwed, there is a drawback that the processing cost is high. Also, the cap 53 and the flange portion
54 and the outer casing 58
Since the waterproof packings 57 and 59 and the annular groove for fitting them are required on the mating surfaces with and the external body 55 is additionally provided, the number of parts and the processing man-hours of the parts are increased, and the manufacturing cost is increased. However, there is an inconvenience that the assembling work becomes complicated.

Therefore, in the present invention, whether the outer peripheral shape of the front end portion of the satellite broadcast receiving primary radiator is circular or non-circular, it can be easily assembled with a minimum number of parts without screws and has an external appearance. The purpose is to improve the appearance.

[0005]

In the primary radiator for receiving satellite broadcasting of the present invention, a chassis installed in an exterior case is used.
In the structure of the front end portion of the primary radiator for satellite broadcasting reception in which the open ends of the horn protruding portion of the chassis and the outer casing are closed with caps, the flange of the horn protruding portion of the chassis is A predetermined gap is formed between the outer peripheral surface of the outer casing and the inner peripheral surface of the outer casing that faces the outer peripheral surface of the outer casing, and the cap is formed into a spherical portion that covers the open ends of the outer casing and the horn protrusion. A cylindrical body portion to be inserted between the outer peripheral surface of the flange portion of the horn protruding portion and the inner peripheral surface of the outer casing is projectingly provided, and the spherical portion has a spherical portion at the tip end portion thereof. When the protrusion is in contact with the protrusion, the claw at the tip is provided with a plurality of locking protrusions that engage with the step at the rear end of the collar. Surface and exterior case
It is characterized in that a waterproof packing that seals between the inner peripheral surface of the cloth and the inner peripheral surface is attached.

The outer peripheral shape of the outer casing contacting surface of the spherical portion of the cap may be matched with the outer peripheral shape of the outer casing opening end. Further, the outer peripheral shape of the collar portion of the horn protruding portion of the exterior case and the chassis can be circular or non-circular.

The inner peripheral surface of the cylindrical portion of the cap and the chassis
It is advisable to form a gap between the protruding portion and the outer peripheral surface of the flange portion so as to check whether the waterproof packing to be interposed on the outer peripheral surface of the tubular portion of the cap is forgotten to be attached.

[0008]

[Operation] Between the outer peripheral surfaces of the collar portions 10, 32 of the chassis 2, 31 and the inner peripheral surfaces of the outer casings 1, 33, the cap 1
When 6, 6 and 34 are inserted through the locking projections 18, first, the locking projections 18 elastically deform and slide on the outer peripheral surfaces of the collar portions 10, 32 by the claw portions 21, and then are provided on the tubular body portions 19, 39. The waterproof packings 24 and 40 slide on the inner peripheral surfaces of the outer cases 1 and 33. When the spherical portions 17, 38 come into contact with the horn protruding portions 9, 30 and / or the outer casings 1, 33, the claw portion 2
1 engages with the rear ends of the collar portions 10 and 32, and the cap 1
6 and 34 are fixed to the horn protrusions 9 and 30 and fixed to the outer casing.
The openings 1, 33 and the horn projections 9, 30 are closed, and the waterproof packings 24, 40 ensure the watertightness of the front end of the primary radiator.

Further, when the caps 16 and 34 are attached to the chassis 2 and 31 before being attached to the outer casings 1 and 33, the caps 16 and 32 are attached to the collar portions 10 and 32 of the chassis 2 and 31 as described above. 34 is inserted from the locking projection 18.
However, the outer peripheral surface of the cylindrical body portion by the waterproof packings 24, 40,
The seal between the inner peripheral surfaces of the outer case is obtained by mounting the outer case 1 and 33 on the chassis 2 and 31 to which the caps are mounted.

Therefore, both of them are different only in the mounting time of the outer casings 1 and 33 to the chassis 2 and 31 before or after mounting the caps 16 and 34 on the chassis 2 and 31. The outer casings 1, 33 and the chassis 2, 31 are the same in that the opening ends can be closed and the cap can be attached with one touch to obtain watertightness.

The caps 16 and 34 are the horn protrusions 9 and 3, respectively.
Since it is inserted into the collar parts 10 and 32 of No. 0 and attached to the outer case 1 and 33 and the horn protrusions 9 and 30 , even if the outer peripheral shape of the open end of the outer case 1 and 33 is non-circular. The spherical end portions 17, 38 having the same outer peripheral shape and size can cover the open end faces of the outer casings 1, 33.

When a gap is provided between the outer peripheral surfaces of the collar portions 10, 32 of the chassis 2, 31 and the inner peripheral surfaces of the cylindrical body portions 19, 39 of the caps 16, 34, the cylindrical body portions 19 of the cap, The failure to attach the waterproof packings 24, 40 to be attached to 39 can be determined by the cap movement amount when the primary radiator is shaken in the radial direction.

[0013]

EXAMPLES Examples of the present invention will be described with reference to the drawings. In FIGS. 1 and 3, an outer case 1 is a bottomed circular cylinder having one end opened, and a through hole 4 for inserting an output terminal 3 provided at the rear portion of the chassis 2 is formed at the center of the bottom. An antenna arm mounting portion 5 is provided so as to project obliquely forward and downward toward the bottom of the lower surface. The chassis 2 has a circular collar 1 at the front of a horn protrusion 9 having a recessed primary horn 8 opening at the front end.
0 is provided as a protrusion, and an intermediate portion connected to the horn protrusion 9 is formed as a rectangular shaft portion 12 having a waveguide 11 and the like, and a rear end surface of the shaft portion 12 and a nut 13 screwed to the output terminal 3. Exterior case 1
Installed on. Although not shown, a printed circuit board, a frequency conversion circuit and other electronic circuit parts are incorporated in the exterior case 1 to which the chassis 2 is attached, and the antenna arm attachment portion 5 at the rear end of the lower surface is provided with a support rod, Attach it to the reflector via the mounting bracket.

A predetermined gap 14 is formed between the outer peripheral surface of the collar portion 10 of the horn protruding portion 9 and the inner peripheral surface of the outer case 1 which faces the outer peripheral surface of the collar portion 10. The cap 16 has a spherical portion 17 that covers the front end surfaces of the outer case 1 and the chassis 2 and a single locking protrusion 18 formed at the tip of the spherical portion 17 that is integrally connected to the spherical portion to form a gap in the gap 14. A claw portion 21 at the tip of the locking projection 18 engages with a rear end portion 22 of the collar portion 10 when the spherical portion 17 is in contact with the front end surface of the chassis 2 and is formed of a cylindrical body portion 19 that is inserted and removed. I am trying. An annular groove 23 is formed on the outer peripheral surface of the base of the tubular portion 19, and the waterproof packing 24
Is fitted. This waterproof packing 24 is a cap 16
This seals the gap between the outer peripheral surface of the cylindrical body portion 19 and the inner peripheral surface of the outer case 1 facing the outer peripheral surface.

In this embodiment, the cap 16 is attached to the chassis 2 before it is attached to the outer case 1 and then the chassis 2 is attached to the outer case 1, or the outer case 1 is attached. The cap 16 may be attached to the chassis 2 and the outer case 1 attached to the.

In the other embodiment shown in FIG. 2, since the flange portion 32 of the chassis 31 and the front portion of the exterior case 33 are both oval-shaped, the spherical portion 38 of the cap 34 corresponding thereto is formed.
Also, the cylindrical portion 39 has the same oval shape. Further, the output terminal 35 is provided on the rear portion of the lower surface of the outer case 33, and the antenna arm attachment portion 37 is provided on the front portion of the lower surface so as to project obliquely forward and downward. The chassis 31 is a rear portion 3 of the collar 32.
6 is brought into contact with a protrusion (not shown) having a screw hole protruding in the exterior case 33, and is attached from the front surface of the chassis 31 with a bolt. Therefore, the cap 34 is attached to the chassis 3
Exterior part 33 attached to the collar part 32 and chassis 31 of No. 1
The tubular body portion 39 with the locking projection 18 is inserted from between and to be attached to the collar portion 32. In the case where the chassis 31 is fixed by a mounting bolt inserted from the outside of the outer case 33, the cap 34 is attached to the chassis 31 before the outer case 33 is attached, and then the chassis 31 is attached, as in the case of FIG. It can also be attached to the outer case 33.

In this embodiment, the outer peripheral shape of the outer casing contacting surface of the spherical portion 38 and the front end face 41 of the outer casing 33.
Since the cap 34 attached to the collar portion 32 of the chassis 31 is made to match the outer peripheral shape of the spherical portion 3
In step 8, the front end surface of the outer casing 33 is covered to close the open ends of the chassis 31 and the outer casing 33, and the outer peripheral surface of the tubular portion 39 and the outer casing 33 opposed thereto. The gap between the inner peripheral surface and the inner peripheral surface is sealed by the waterproof packing 40 provided on the tubular body portion 39 of the cap 34.

[0018]

As described above, according to the present invention, the cap provided with the waterproof packing on the outer peripheral surface of the cylindrical body is attached to the flange of the horn protruding portion by one-touch operation to attach the front end of the primary radiator. Since it is assembled, the front end portion of the primary radiator can be easily assembled with the minimum number of parts without screws, which helps to reduce the cost.

Since the cap is inserted into the horn protruding portion and attached to the outer casing and the chassis, no matter what shape the outer periphery of the outer casing opening end has, By using a cap that matches the shape,
Since the front end face is covered, the appearance of the front part of the primary radiator can be improved. Therefore, the conventional exterior body is not required, and the cost can be reduced and the configuration can be simplified.

Furthermore, if a gap is provided between the outer peripheral surface of the flange portion of the horn protruding portion and the inner peripheral surface of the tubular portion of the cap, the primary radiator is shaken if the waterproof packing is forgotten when assembled. You can discover it.

[Brief description of drawings]

FIG. 1 is a partially sectional side view of an embodiment of the present invention.

FIG. 2 is a vertical sectional view of another embodiment of the present invention.

FIG. 3 is an exploded view of the embodiment shown in FIG.

FIG. 4 is a vertical sectional view of a conventional product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exterior case 2 Chassis 9 Horn projection part 10 Collar part 14 Gap 16 Cap 17 Spherical part 18 Locking projection 19 Cylinder part 21 Claw part 22 Step part 24 Waterproof packing 30 Horn projection part 31 Shah -Shi 32 Collar 33 Exterior case 34 Cap 38 Spherical part 39 Cylindrical part 40 Waterproof packing

Claims (4)

[Scope of utility model registration request] 1. A chassis hoist installed inside an exterior case.
In the structure of the front end of the primary radiator for satellite broadcasting reception in which each open end of the projecting part and the outer case is closed with a cap, etc., the outer peripheral surface of the collar part of the horn projecting part of the chassis A predetermined gap is formed between the outer case and the inner peripheral surface of the outer case that faces the outer case, and the cap is a horn on a spherical portion that covers the open ends of the outer case and the protruding portion of the horn. A cylindrical body portion to be inserted between the outer peripheral surface of the flange portion of the projecting portion and the inner peripheral surface of the outer casing is provided in a protruding manner, and a spherical portion is provided at the tip of the cylindrical portion to project the outer casing and / or the horn. A plurality of locking projections are provided so that the claw portion at the tip engages with the stepped portion at the rear end of the collar portion in the state of being in contact with the outer peripheral surface of the tubular body portion and the outer peripheral surface of the tubular body portion and the exterior. A structure of a front end portion of a primary radiator for satellite broadcasting reception, which is equipped with a waterproof packing that seals between the inner peripheral surface of the case and the casing. 2. The structure of the front end portion of the primary radiator for satellite broadcasting reception according to claim 1, wherein the outer peripheral shape of the outer casing contacting surface of the spherical portion matches the outer peripheral shape of the outer casing opening end. 3. The flange of the horn protrusion and the outer peripheral shape of the outer case are circular or non-circular.
The structure of the front end of the primary radiator for receiving satellite broadcasting described in. 4. The primary radiation for satellite broadcasting reception according to claim 1, wherein a gap is provided between the inner peripheral surface of the cylindrical portion of the cap and the outer peripheral surface of the flange portion of the horn protruding portion of the chassis. Structure of the front end of the vessel.