JP3319272B2 - Automotive antenna - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted antenna which is mounted on an outer portion of a vehicle body and is suitable for receiving television broadcasts and GPS radio waves.

[0002]

2. Description of the Related Art In recent years, it has become common to equip a vehicle interior with a liquid crystal television. As an antenna for this liquid crystal television, generally, two antennas are separately mounted on an outer portion of a vehicle body so as to receive diversity.

On the other hand, a car navigation system which receives a GPS (Global Positioning System) radio wave and displays its position on a liquid crystal monitor is becoming popular. Therefore, an antenna for receiving a GPS radio wave is attached to an outer portion of the vehicle body separately from an antenna for receiving a television broadcast. The liquid crystal television is commonly used as a monitor for a car navigation system.

[0004]

As described above, a liquid crystal television is commonly used as a monitor of a car navigation system.
It is mounted separately from the S radio wave receiving antenna. This is because not only are the receiving frequency bands of both antennas completely different from each other, but also the TV broadcast signal is a terrestrial wave, whereas the GPS radio wave comes down from the communication satellite, that is, from the heavens. Is also quite different.

However, providing both antennas separately degrades the appearance of the vehicle, increases the number of projections provided on the outside of the vehicle body, and is dangerous. Further, since two antennas are required, the overall cost is high. There is a defect that it is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made in consideration of an antenna for receiving a television broadcast and a GPS.
An object of the present invention is to provide an in-vehicle antenna in which an antenna for receiving a radio wave is integrated and an attitude of the antenna for receiving a GPS radio wave can be adjusted toward the sky. It is another object of the present invention to provide an on-vehicle antenna capable of adjusting a posture by a simple mechanism.

[0007]

In order to achieve the above object, a vehicle-mounted antenna according to the present invention is provided with a television broadcast receiving antenna disposed on a base member attached to and attached to an outer portion of a vehicle body. At the same time, an antenna for receiving GPS radio waves is provided via an attitude adjustment mechanism, and the antenna for receiving GPS radio waves is configured to be capable of adjusting the elevation angle and the inclination angle to the left and right with respect to the base member.

[0008] Further, the above-mentioned attitude adjusting mechanism is provided with the above-mentioned GPS.
A projection provided with a sphere at the tip is provided on the lower surface of the antenna for radio wave reception, and a pressing member for holding the sphere is provided on the base member, and the pressing member is elastically contacted with the sphere so that the sphere can rotate. You may comprise so that a state and the said spherical body can be set to the state where the said spherical body was firmly clamped and the said spherical body was fixed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1A and 1B are external views of an embodiment of the on-vehicle antenna according to the present invention, wherein FIG. 1A is a plan view and FIG. 1B is a side view. FIG. 2 is a view taken in the direction of the arrow A in FIG. FIG. 3 is a sectional view taken along line BB of FIG. FIG. 4 is an exploded perspective view of the posture adjustment mechanism. FIG.
FIG. 5 is a diagram showing a state in which the posture adjustment mechanism is assembled to a base member.

As shown in FIG. 1, an on-vehicle antenna according to the present invention includes a base member 10 provided with an antenna 12 for receiving television broadcasts and an antenna 14 for receiving GPS radio waves. The television broadcast receiving antenna 12 is composed of two telescopic rod antennas.
The elevation angle can be adjusted with respect to 0, and the angle between the two rod antennas can be adjusted. Conventionally known techniques are used for these structures. The antenna 14 for receiving GPS radio waves is configured to be capable of adjusting the elevation angle and the inclination angle to the left and right with respect to the base member 10. Then, the base member 10 is attached to an outer portion of the vehicle body by a conventionally known technique. The base member 10 may be fixed to an outer portion of the vehicle body. However, the base member 10 may be fixed to the outer portion of the vehicle body through an appropriate tilt adjustment mechanism so that the tilt angle can be adjusted right and left with respect to the outer portion of the vehicle body. It may be attached to.

A mechanism by which the GPS radio wave receiving antenna 14 can adjust the elevation angle and the left and right inclination angles with respect to the base member 10 will be described below. In the antenna 14 for receiving GPS radio waves, a GPS antenna main body 18 is provided on a mounting substrate 16, and an antenna cover 20 is fixed to the mounting substrate 16 so as to cover the GPS antenna main body 18. Then, the mounting board 16 is disposed on the base member 10 via the posture adjusting mechanism 30.

The attitude adjusting mechanism 30 includes a sphere 34 provided at a lower end of a projection 32 projecting below the lower surface of the mounting board 16 and a sphere 34 fixed to the base member 10.
From the state in which the mounting board 16 is held rotatably by elasticity and the elevation angle and the right and left inclination angles of the mounting board 16 can be adjusted with respect to the base member 10, and the pressing member that firmly sandwiches and fixes the mounting board 16 to the base member 10. Become.

The pressing member is configured as follows. A squeezing portion 36a is provided at one end of a ball receiving cylinder 36 having an inner diameter slightly larger than the diameter of the sphere 34, and an axial female screw is engraved on the squeezing portion 36a. The diameter is 36b. In addition, the other end is opened, and a female screw is engraved on the inner circumference on the opening side. Further, a large-diameter hole through which the spherical body 34 can pass, and a through-hole 36c formed of an elongated hole continuous with the axial direction and having a width larger than the outer diameter of the projection 32 penetrate through the side wall of the ball receiving cylinder 36. . A substantially L-shaped fixing member 36d is provided on the outer periphery of one side wall of the bearing cylinder 36 with the through hole 36c facing upward. In addition, a fixing screw rod 44 is screwed into the female screw of the ball receiving cylinder 36.

Then, a spring 38 is inserted into the ball receiving cylinder 36 from the opening side, and one end of the spring 38 abuts on the step of the pinching portion 36a. Further, the first ball receiving member 40 is inserted. The first ball receiving member 40 includes a rod 40a that can insert one end into the female screw of the pinching portion 36a,
A disk 40b fixed to the other end of the rod 40a and having an outer diameter slightly smaller than the inner diameter of the ball receiving cylinder 36;
The concave portion 40c formed on the other end surface of the groove b and in contact with the spherical body 34
And formed. The spring 38 and the first
When the ball receiving member 40 is inserted into the through hole 3
The spherical body 34 is inserted from 6c, and the second ball receiving member 42 is further screwed into the opening of the ball receiving cylinder 36. The second ball receiving member 42 is formed by a male screw portion 42a screwed into a female screw engraved in the opening of the ball receiving cylinder 36, a flange portion 42b for restricting screwing, and a male screw portion 42a. A cylindrical portion 42c extending toward the sphere 34, a concave portion 42d formed on the tip end surface of the cylindrical portion 42c and abutting against the sphere 34, a small-diameter portion 42e provided on the flange portion 42b, and a hexagonal hole for rotating for screwing. 4
2f.

The base member 10 is divided into two parts, and is composed of a pair of a left half body 10a and a right half body 10b. The pair of left and right halves 10a and 10b are tightened and fixed by screws 50 and integrated. You. The left and right halves 10a, 10b
In the corresponding position, the small diameter portion 36 at one end of the ball receiving cylinder 36
b and the small-diameter portion 42e of the second ball receiving member 42 are provided with holes 10c and 10d into which the respective small diameter portions 42e can be fitted and inserted, and a fixing member 36d of the ball receiving cylinder 36 is screwed into one left half 10a. 52
A fixing projection 10e is fixedly provided.

In such a configuration, the mounting board 16
S antenna main body 18, antenna cover 20, and projection 3
2 is appropriately fixed with screws or the like. And spring 3
The ball 34 is inserted through the through hole 36c into the ball receiving cylinder 36 into which the ball receiving member 8 and the first ball receiving member 40 have been inserted, and the second ball receiving member 42 is further assembled. Here, the fixing screw rod 44
Is not screwed strongly, the first ball receiving member 40 elastically contacts the sphere 34 by the elastic force of the spring 38, and the sphere 34 is held by being pinched and pressed by the first and second ball receiving members 40 and 42. But can rotate freely.

Then, the ball receiving cylinder 36 and the like assembled in this state are inserted and fitted with the small diameter portion 36b into the hole 10c, and the fixing member 36 is fixed to the fixing projection 10e with the screw 52 so that the base member 10 It is fixed to the left half 10a. Further, the right half body 10b of the base member 10 is fixed to the left half body 10a with screws 50 by inserting the small diameter portion 42e of the second ball receiving member 42 into the hole 10d, and includes the ball receiving cylinder 36 and the like. The posture adjustment mechanism 30 is fixed to the integrated base member 10.

When the base member 10 is appropriately fixed to the outer portion of the vehicle body, the sphere 34 held and pressed and held by the first and second ball receiving members 40 and 42 resists the elasticity of the spring 38. Antenna for receiving GPS radio waves
The first and second ball receiving members 40 and 42 are adjusted by appropriately adjusting the posture of the first and second ball receiving members 40 and 42.
, The sphere 34 is strongly pinched and pressed, and the sphere 34 is fixed without being rotated. Therefore, antenna 1 for receiving GPS radio waves
4 with respect to the base member 10 is fixed.

In the above embodiment, the GPS radio wave receiving antenna 14 is supported on the base member 10 by the sphere 34, so that the GPS radio wave receiving antenna 14 is rotated by the sphere 34 so that the elevation angle and the right and left The tilt angle can be arbitrarily adjusted.

In the above embodiment, the antenna 14 for receiving the GPS radio wave can be adjusted with respect to the base member 10 in addition to the adjustment of the elevation angle and the right and left inclination angles by the rotation of the sphere 34, and also the swing adjustment in the left and right direction. May be. In the above embodiment, the projection 32 having the sphere 34 is provided on the mounting substrate 16 on which the GPS antenna main body 18 is provided, and the ball receiving cylinder 3 is provided.
Although the base member 10 and the like are provided on the base member 10, it is easily understood that instead of such a configuration, the base member 10 may be provided with a projection 32 having a sphere 34 and the mounting substrate 16 may be provided with a ball receiving cylinder 36 and the like. Will get. Then, a posture adjusting mechanism 3 for adjusting the posture of the antenna 14 for receiving GPS radio waves.
0 is not limited to the configuration of the above-described embodiment, but may be any configuration as long as the elevation angle and the left-right tilt angle of the antenna 14 for receiving GPS radio waves can be adjusted.

In order to perform diversity reception,
Two antennas 12 and 12 for receiving television broadcasting must be provided separately, but one antenna 14 for receiving GPS radio waves is sufficient. Therefore, one of the pair of two in-vehicle antennas may be provided with a GPS radio wave receiving antenna 14 and the other may be provided with a dummy having the same appearance and the like.

The two in-vehicle antennas used as a pair to perform diversity reception are provided near the left and right edges of the rear glass of the automobile or the left and right edges of the trunk lid, and receive GPS radio waves. The left and right inclination angles at which the attitude of the antenna 14 is adjusted are one direction to the left or the right depending on the mounting position. So, if you decide in advance for left-hand mounting and right-hand mounting,
The adjustment range of the inclination angle of the antenna 14 for receiving the GPS radio wave may be only the left side or only the right side.

[0023]

As described above, since the vehicle-mounted antenna according to the present invention is constituted, the following special effects can be obtained.

According to the first aspect of the present invention, an antenna for receiving a television broadcast and an antenna for receiving a GPS radio wave are provided on one base member attached to and attached to an outer portion of the vehicle body. Therefore, it is suitable as an antenna for a vehicle equipped with a liquid crystal television and a car navigation system. In addition, since both antennas are integrated, the number of required externally mounted antennas is small, the antenna can be manufactured at a low cost, and the external appearance is excellent. Since the antenna for receiving the GPS radio wave with respect to the base member can be freely adjusted in the elevation angle and the tilt angle to the left and right by the posture adjustment mechanism, the antenna for receiving the GPS radio wave can be adjusted regardless of the mounting posture of the base member. , And the GPS radio wave can be reliably received.

Further, in the vehicle-mounted antenna according to the second aspect, the adjustment of the attitude of the antenna for receiving the GPS radio wave is performed by the rotation of the sphere, and the adjustment of the elevation angle and the right and left inclination angles are combined at one place. The structure is simple, and the space occupied by the mechanism is smaller than that of a mechanism in which a rotating shaft is provided for adjusting the elevation angle and the right and left inclination angles, respectively, which is suitable for miniaturization.

[Brief description of the drawings]

FIG. 1 is an external view of an embodiment of an on-vehicle antenna according to the present invention, in which (a) is a plan view and (b) is a side view.

FIG. 2 is a view taken in the direction of arrow A in FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is an exploded perspective view of a posture adjustment mechanism.

FIG. 5 is a diagram showing a state in which the posture adjustment mechanism is assembled to a base member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Base member 12 Antenna for television broadcast reception 14 Antenna for GPS radio wave reception 30 Attitude adjustment mechanism 32 Projection 34 Spherical body 36 Ball receiving cylinder 36a Nipping part 36c Through hole 38 Spring 40 First ball receiving member 42 Second ball Receiving member 44 Screw bar for fixing

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Keiji Ikeda 7-5-11 Takinogawa, Kita-ku, Tokyo Inside Yokoo Co., Ltd.

Claims (2)

(57) [Claims] An antenna for receiving a television broadcast is disposed on a base member attached to and attached to an outer portion of a vehicle body, and an antenna for receiving a GPS radio wave is disposed via an attitude adjusting mechanism. An antenna for mounting on a vehicle, wherein an antenna for receiving a GPS radio wave is configured so that an elevation angle and an inclination angle to the left and right with respect to the base member can be adjusted. 2. The in-vehicle antenna according to claim 1, wherein the attitude adjusting mechanism is provided with a projection having a sphere provided at a tip on a lower surface of the antenna for receiving a GPS radio wave, and the sphere is held by the base member. And a configuration in which the pressing member is elastically contacted with the sphere so that the sphere can be set in a state in which the sphere can rotate and a state in which the sphere is strongly sandwiched and the sphere is fixed. An in-vehicle antenna characterized in that: