JP3010216U - Planar antenna - Google Patents

Abstract

(57) [Abstract] [Purpose] A planar antenna having a case around it, the planar antenna and the case can be easily fixed, and stable characteristics can be obtained even when stress due to shock, vibration or heat is applied. [Structure] A rubber packing (7) is wound around a ground antenna (1) and a ground conductor plate (3) attached to an amplifier (2),
Insert the amplifier into the hole (13) of the lower case (5), cover the hole (12) of the upper case (4) with the planar antenna, and put the rubber packing on the step (18) of the upper case and the step (1) of the lower case.
9), and tighten the screw (6) to fix the rubber packing in the state that it is crushed by the upper and lower cases.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a planar antenna having a case mounted around a mobile body such as a car, an airplane or a ship for signal reception.

[0002]

[Prior art]

 Conventionally, in this type of antenna, in order to mount the plane antenna or the amplifier inside the case, the ground conductor plate or the plane antenna attached to the plane antenna is fixed to the case with screws or the like. FIG. 4 shows a configuration in which the ground conductor plate 3 attached to the planar antenna 1 is fixed to the lower case 5 with screws 9 and the planar antenna 1 and the amplifier 2 are mounted inside the case. (A) is a perspective view and (b) is a sectional view taken along the center.

The upper case 4 is provided with a hole 12 for accommodating the planar antenna 1, a recess 15 for accommodating a rubber packing 14 having a circular cross section, and a screw hole for fixing the upper case 4 and the lower case 5 with screws 6. is there. The lower case 5 has a hole 13 for accommodating the amplifier 2, a recess 16 for accommodating a rubber packing 14 having a circular cross section, a screw hole 11 for fixing the ground conductor plate 3 with a screw 9, an upper case 4 and a lower case. A hole 17 for fixing 5 with a screw 6 is provided.

The planar antenna 1 and the ground conductor plate 3 are joined with a double-sided tape, and the amplifier 2 and the ground conductor plate 3 are soldered. Since the planar antenna joined to the ground conductor plate with double-sided tape and the amplifier soldered to it are mounted inside the upper and lower cases with screws 9, there are four holes 10 in the ground conductor plate and in the lower case. Four screw holes 11 are provided.

In order to mount an amplifier soldered to a plane antenna joined to a ground conductor plate with a double-sided tape inside the upper case and the lower case, first insert the amplifier 2 into the hole 13 of the lower case 5 and ground it. The conductor plate 3 is fixed with screws 9 from above. Next, the rubber packing 14 having a circular cross section is mounted in the recess 16 provided in the lower case 5.

The hole 12 of the upper case 4 is inserted from above the planar antenna 1 into the lower case 5 in which the planar antenna 1 and the amplifier 2 attached to the ground conductor plate 3 and the rubber packing 14 having a circular cross section are set. Then, the rubber packing 14 having a circular cross section set in the recess 16 of the lower case 5 is positioned so as to be housed in the recess 15 of the upper case 4. The upper case 4 and the lower case 5 are fixed to each other in such a manner that the screw 6 is tightened from below the lower case 5 and the rubber packing 14 having a circular cross section is sandwiched between the upper case 4 and the upper case 4.

[0007]

[Problems to be solved by the device]

 However, in such a conventional planar antenna, the ground conductor plate is fixed to the lower case with screws, so the number of parts and the number of steps for screwing increase, and the shape of the case becomes complicated due to the setting of screw holes. . In addition, the screwed part is subject to stress due to impact and stress due to the difference in coefficient of thermal expansion, which may cause backlash due to vibration and other problems.

The present invention has been made in view of the above background, and an object of the present invention is to easily fix a flat antenna and a case, and to prevent rattling even if a shock, vibration, or heat stress is applied. It is to provide a planar antenna that can receive radio waves without being generated.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the present invention, an elastic material such as a rubber packing or a rubber sheet is wound around the ground conductor plate attached to the planar antenna or around the planar antenna, and that portion is The upper and lower cases are fixed with screws while being sandwiched between the upper and lower cases and crushed.

[0010]

[Action]

 According to the present invention having the above-mentioned configuration, since it is not necessary to screw the flat antenna to the lower case via the ground conductor plate, the number of parts is reduced, the case structure is simplified, and the antenna and the case are Easy to fix.

In addition, since the rubber packing or the rubber sheet directly rotates or sandwiches the ground conductor plate or the planar antenna that accompanies the planar antenna, the elastic force of the rubber packing causes stress due to shock or vibration, and causes stress to the planar antenna. It absorbs stress due to the difference in the thermal expansion coefficient of the case, so these stresses can be reduced, and in addition, it can also serve as a drip-proof and moisture-proof function.

[0012]

【Example】

 Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 (a) is a perspective view of a case where a planar antenna 1 and an amplifier 2 are joined to a ground conductor plate 3 and a rubber packing 7 having a U-shaped cross section is rotated around the ground conductor plate 3. (B) is drawn as a cross-sectional view when (a) is cut at the center, and illustration of screw holes for fixing the upper case 4 and the lower case 5 is omitted.

The upper case 4 has a hole 12 for accommodating the planar antenna 1, a step 18 into which a rubber packing 7 having a U-shaped cross section is fitted, and a screw hole for fixing the upper case 4 and the lower case 5 with a screw 6. It is provided. The lower case 5 is provided with a hole 13 for accommodating the amplifier 2, a step 19 into which a rubber packing 7 having a U-shaped cross section is fitted, and a hole 17 for fixing the upper case 4 and the lower case 5 with screws 6.

The planar antenna 1 and the ground conductor plate 3 are joined with a double-sided tape, and the amplifier 2 and the ground conductor plate 3 are soldered. A rubber packing 7 having a U-shaped cross section is wound around the ground conductor plate 3 to which the plane antenna 1 and the amplifier 2 are attached, and the amplifier 2 is rotated into the hole 13 and around the ground conductor plate 3, and a U-shaped cross section. Set the rubber packing 7 of the mold on the step 19 of the lower case 5.

From above the plane antenna 1 and the rubber packing 7 having a U-shaped cross section set in the lower case 5, the plane antenna 1 is inserted into the hole 12 of the upper case 4 and the rubber having a U-shaped cross section is provided to the step 18. The upper case 4 is covered so that the packings 7 are respectively fitted, and the lid is covered.

In this state, a screw 6 is tightened from below the lower case 5, and a rubber packing 7 having a U-shaped cross section which is wound around the ground conductor plate 3 is sandwiched between the upper case 4 and the lower case 5. Fix in the crushed state.

As described above, in the case where the rubber packing 7 having a U-shaped cross section is rotated around the ground conductor plate 3, the ground conductor plate 3 is not fixed to the lower case 5 by screws. Since the screw for fixing the lower case to the lower case is not required, and the holes for screwing and the recesses 15 and 16 for accommodating the rubber packing according to the configuration of FIG. 4 are eliminated, the number of parts is reduced, and the structure of the upper case and the lower case is reduced. Will also be easier.

FIG. 2 is an embodiment in the case where the amplifier and the ground conductor plate are not provided, and is a cross-sectional view similar to FIG. 1B, in which the screw holes for fixing the upper case 4 and the lower case 5 are omitted. is there. The rubber packing 7 having a U-shaped cross section is rotated around the planar antenna 1 and set in the step 21 where the planar antenna 1 provided in the lower case 5 and the rubber packing 7 having a U-shaped cross section fit.

From the upper side of the planar antenna 1 which is set in the lower case 5 and which has a rubber packing 7 having a U-shaped cross section around the planar antenna 1 to the step 20 of the upper case 4, the planar antenna 1 and the U-shaped cross section are provided. The upper case 4 is covered so that the rubber packing 7 of 3 is fitted, and the rubber packing 7 having a U-shaped cross section is sandwiched between the upper case 4 and the lower case 5 and fixed with a screw in a crushed state.

In the embodiment without the ground conductor plate and the amplifier, the upper case 4 and the lower case 5 have holes for accommodating the flat antenna 1 and the amplifier 2 and a recess for accommodating the rubber packing around the ground conductor plate. Since there is no such, the shapes of the upper case 4 and the lower case 5 can be further simplified.

FIG. 3A shows an example in which a rubber sheet 8 is used instead of the rubber packing having a U-shaped cross section in the configuration described in FIG. (B) is a perspective view of a rubber sheet. The rubber sheet 8 has a shape in which the upper surface and the lower surface of the planar antenna 1 and a central portion of a square-shaped sheet plate having substantially the same size are hollowed out into a square shape. The hollow shape may be circular or triangular. If the rubber sheet 8 is used, it is only necessary to sandwich the upper surface and the lower surface of the planar antenna 1, and the work of wrapping a rubber packing having a U-shaped cross section around the planar antenna 1 can be omitted.

[0022]

[Effect of device]

 As described in detail above, when the planar antenna according to the present invention is used, the rubber packing having a U-shaped cross section is wound around the ground conductor plate attached to the planar antenna, and the rubber packing portion is attached to the upper case. By fixing the upper and lower cases with screws while sandwiching them with the lower case and crushing them, the stress due to shock or vibration and the stress due to the difference in coefficient of thermal expansion between the planar antenna and the case are absorbed by the rubber packing. Since it can be reduced and it can be drip-proof and moisture-proof, stable characteristics can be obtained. In addition, since it is not necessary to fix the ground conductor plate to the lower case with screws, the number of parts is reduced, the case structure can be simplified, and the assembly is simplified, which reduces man-hours and costs.

When a rubber packing having a U-shaped cross section is provided around the planar antenna, the case structure can be further simplified and the assembling can be simplified. When the upper surface and the lower surface of the planar antenna are sandwiched by the rubber sheet, the work of rotating the rubber packing around the planar antenna is eliminated, so that the assembly becomes easier and the man-hours can be reduced.

[Brief description of drawings]

FIG. 1A is a perspective view of a planar antenna of the present invention when a rubber packing is wound around a ground conductor plate.
(B) is sectional drawing which abbreviate | omitted the screw fixing part of (a).

FIG. 2 is a cross-sectional view in which a screw fixing part is omitted in a case where a rubber packing is provided around a planar antenna without an amplifier and a ground conductor plate.

FIG. 3 (a) is a diagram in which a rubber sheet is used as the rubber packing in the configuration of FIG. (B) is a perspective view of a rubber sheet.

FIG. 4A is a perspective view of a conventional product. (B) is
It is sectional drawing which abbreviate | omitted the screw fixing part of (a).

[Explanation of symbols]

1 plane antenna 2 amplifier 3 ground conductor plate 4 upper case 5 lower case 6 case fixing screw 7 rubber packing with a U-shaped cross section 8 rubber sheet 9 ground conductor plate fixing screw 1
0,17 Holes for screwing 11 Screw holes 12 Holes for accommodating planar antennas 13 Holes for accommodating amplifiers 14 Rubber packing with circular cross section 15,16 Recesses for accommodating rubber packings 18, 19, 20, 21, Steps

Claims (3)

[Scope of utility model registration request] 1. An upper case (4) and a lower case (5) are surrounded by a planar antenna (1), an amplifier (2), and a ground conductor plate (3) attached to the planar antenna. In a planar antenna having a structure in which the case is fixed with a screw (6), a rubber packing (7) is rotated around the ground conductor plate, and the rubber packing is sandwiched between the upper case and the lower case and fixed with a screw to fix the planar antenna. A planar antenna characterized by mounting an amplifier and a ground conductor plate inside the upper case and the lower case. 2. A planar antenna having a structure in which the planar antenna (1) is surrounded by an upper case (4) and a lower case (5), and the upper case and the lower case are fixed by screws. A planar antenna characterized in that the rubber packing (7) is rotated, and the rubber packing is sandwiched between the upper case and the lower case and fixed with screws, and the planar antenna is mounted inside the upper case and the lower case. 3. A flat antenna (1) is sandwiched between an upper surface and a lower surface by a rubber sheet (8), and the rubber sheet portion is an upper case (4).
The planar antenna according to claim 2, wherein the planar antenna is fixed by screws while being sandwiched between the lower case (5) and the lower case (5).