Claims
- 1. A motor driven antenna apparatus comprising:a rack cord coupled in a coaxial direction to a base end portion of an antenna element, said antenna element being constructed of a helical coil; a pinion gear coupled to a motor drive unit geared with a rack of said rack cord; and said antenna element being movable to be projected and stored by way of a rotating drive of said motor drive unit.
- 2. The motor driven antenna apparatus according to claim 1 wherein:said rack cord is moved in either a curve manner or a straight-line manner by the rotating drive of said motor drive unit.
- 3. The motor driven antenna apparatus according to claim 1, wherein:a guide provided in a case by which said rack cord can be moved while said rack cord abuts against said guide while being curved.
- 4. The motor driven antenna apparatus according to claim 1, wherein:said antenna element further includes an insulating resin covering member surrounding an outer peripheral portion of an antenna element.
- 5. A motor driven antenna apparatus comprising:a rack cord having a flexibility coupled in a coaxial direction to a base end portion of an antenna element made of a helical coil; a pinion gear coupled to a motor drive unit geared with a rack of said rack cord; said rack cord, said motor drive unit, and said pinion gear stored into a case; a guide provided in said case by which said rack cord can be moved while said rack cord abuts against said guide while being curved; said antenna element is movable to be projected and stored by a rotating drive of said motor drive unit; and said rack cord is moved while said rack cord abuts against the guide.
- 6. The motor driven antenna apparatus according to claim 5 wherein:said rack cord is curved at an angle more than 180 degrees under storage condition of said antenna element.
- 7. The motor driven antenna apparatus according to claim 5, wherein:said guide is formed by a pipe-shaped case member formed within said case and projected from said case toward either a projection direction or a transverse direction with respect to the projection direction and the storage or move direction of said antenna element; and under storage condition of said antenna element, said rack cord is bent in either a U-shaped manner or an L-shaped manner while said rack cord is curved along said guide.
- 8. A motor driven antenna apparatus comprising:an antenna element freely projected or stored from or into a cylindrical-shaped base along an axial direction; said cylindrical-shaped base penetrated through a hole formed in a vehicle body; an earth fitting member fitted into an outer peripheral portion of said cylindrical-shaped base; a sandwiching member inserted into the outer peripheral portion of said cylindrical-shaped base and a top nut screwed to a tip portion of said cylindrical-shaped base; said vehicle body is sandwiched by said earth fitting member and said sandwiching member by screwing said top nut so as to fix said cylindrical-shaped base to said vehicle body; and said antenna element is projected from said vehicle body, a straight-line-shaped conductive line extended from a base end of said antenna element while having a length defined when said straight-line-shaped conductive line is penetrated through said earth fitting member; a connection fitting member movable along the axial direction fixed on said cylindrical-shaped base and said position of said earth fitting member is not faced to said straight-line-shaped conductive line and is electrically connected thereto; and a power supply fitting member made of a conductive material and positioned in correspondence with the connection fitting member present, wherein said position is arranged on an inner peripheral wall of said cylindrical-shaped base, so that said connection fitting member is elastically made in contact with the power supply fitting member so as to be electrically connected.
- 9. The motor driven antenna apparatus according to claim 8 wherein:an electronic circuit for amplifying an antenna output, or matching a circuit is arranged in the vicinity of said power supply fitting member; and the antenna output is supplied from said power supply fitting member to said electronic circuit by way of a signal path having a pre-selected short dimension.
- 10. The motor driven antenna apparatus according to claim 8 wherein:said antenna element and said straight-line-shaped conductive line, and further, either the connection fitting member or a structural member of said connection fitting member are formed in an integral body by employing an insulating resin.
- 11. A motor driven antenna apparatus comprising:an antenna element freely projected or stored from or into a cylindrical-shaped base along an axial direction; said cylindrical-shaped base is penetrated through a hole formed in a vehicle body; an earth fitting member fitted into an outer peripheral portion of said cylindrical-shaped base; a sandwiching member inserted into the outer peripheral portion of said cylindrical-shaped base and a top nut screwed to a tip portion of said cylindrical-shaped base; said vehicle body is sandwiched by said earth fitting member and said sandwiching member by screwing said top nut so as to fix said cylindrical-shaped base to said vehicle body; whereby said antenna element is projected from said vehicle body, a base end of said antenna element projected from either said vehicle body or an electric conductive member at the same potential as that of said vehicle body by a predetermined distance; a straight-line-shaped conductive line extended from the base end of said antenna element; a connection fitting member movable along the axial direction fixed on said cylindrical-shaped base and further electrically connected to said straight-line-shaped conductive line; and a power supply fitting member made of a conductive material and positioned in correspondence with the connection fitting member present at said position arranged on an inner peripheral wall of said cylindrical-shaped base, so that said connection fitting member is elastically made in contact with the power supply fitting member so as to be electrically connected.
- 12. A motor driven antenna apparatus comprising:an antenna element freely projected or stored from or into a cylindrical-shaped base along an axial direction; said cylindrical-shaped base is penetrated through a hole formed in a vehicle body; an earth fitting member loosely fitted into an outer peripheral portion of said cylindrical-shaped base; a sandwiching member inserted into the outer peripheral portion of said cylindrical-shaped base and a top nut screwed to a tip portion of said cylindrical-shaped base; said vehicle body is sandwiched by said earth fitting member and said sandwiching member by screwing said top nut so as to fix said cylindrical-shaped base to said vehicle body; a hot tube made of an electric conductive material and being along an axis direction arranged on an inner peripheral wall of said cylindrical-shaped base; a connection fitting member being movable within said hot tube along the axis direction and arranged on the side of the base end of said antenna element and is electrically connected thereto; whereby said antenna element is projected from the vehicle body, said connection fitting member elastically made in contact with said hot tube so as to be electrically connected.
- 13. The motor driven antenna apparatus according to claim 12 wherein:an inner diameter of said earth fitting member is made more than 1.2 times larger than an outer diameter of said hot tube.
- 14. A motor driven antenna apparatus comprising:an insulating resin covering member surrounding an outer peripheral portion of an antenna element; a connection conductive member made of an electric conductive member for coupling one end of a rack cord arranged on a lower end of said insulating resin covering member; a base end of said antenna element electrically connected to said connection conductive member; a joint pipe made of an electric conductive material engaged with said connection conductive member while bridging both the lower end portion of said insulating resin covering member and said connection conductive member and caulked so as to couple or fix said insulating resin covering member and said connection conductive member, and further to electrically connect said joint pipe to said connection conductive member; both the coupled insulating resin covering member and said rack cord are movably inserted into the cylindrical-shaped base along the axis direction; under projection condition of said antenna element, a power supply fitting member made of an electric conductive material arranged on said cylindrical-shaped base in correspondence with said joint pipe; and said joint pipe electrically connected to said power supply fitting member by a conductive elastic tongue.
- 15. The motor driven antenna apparatus according to claim 14 wherein:said connection conductive member constituted by a pair of holder members which are geared with the rack at one end of said rack cord and also sandwiches the rack cord, a connection base having a hole into which said holder members are inserted, and a fixing nut member which is screwed to said connection base in order that said holder members are not extracted from said hole; and said joint pipe is engaged with the outer peripheral portion of said fixing nut member and is caulked thereto, so that said fixed nut member is fixed.
- 16. The motor driven antenna apparatus according to claim 14, wherein:a straight-line-shaped conductive line extended from the base end of said antenna element; said straight-line-shaped conductive line electrically connected to a connection base for constituting said connection conductive member; and both said antenna element and said connection base are embedded into an insulating resin rod by insert-molding so as to be formed in an integral body.
- 17. A motor driven antenna apparatus comprising:a rack cord coupled to a base end portion of an antenna element in a coaxial direction, said antenna element being constructed of a helical coil; a pinion gear coupled to a motor drive unit geared with a rack of said rack cord; the antenna element being lifted and lowered by a rotary drive of the motor drive unit; amplifying means for amplifying an antenna output of the antenna element and outputting an amplified antenna output; and control means for causing the amplifying means to be brought into an operating state when said antenna element is located at a lift-up end.
- 18. A motor driven antenna apparatus comprising:a rack cord coupled to a base end portion of an antenna element in a coaxial direction, said antenna element being constructed of a helical coil; a pinion gear coupled to a motor drive unit geared with a rack of said rack cord; the antenna element being lifted and lowered by a rotary drive of the motor drive unit; amplifying means for amplifying an antenna output of the antenna element and outputting an amplified antenna output; muting means for muting a signal path for said amplified antenna output; and control means for causing the muting means to release the muting operation when said antenna element is located at a lift-up end.
Priority Claims (4)
Number |
Date |
Country |
Kind |
9-028529 |
Jan 1997 |
JP |
|
9-028533 |
Jan 1997 |
JP |
|
9-029649 |
Jan 1997 |
JP |
|
9-029650 |
Jan 1997 |
JP |
|
Parent Case Info
This application is a Continuation of PCT International Application No. PCT/JP98/00168 filed on Jan. 19, 1998, which designated the United States, and on which priority is claimed under 35 U.S.C. §120, the entire contents of which are hereby incorporated by reference.
US Referenced Citations (11)
Foreign Referenced Citations (1)
Number |
Date |
Country |
WO 8303715 |
Oct 1983 |
WO |
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/JP98/00168 |
Jan 1998 |
US |
Child |
09/357817 |
|
US |