Transmitter for remote convenience system having coiled, extendable antenna

• US 6,025,786 A
• Filed: 05/06/1998
• Issued: 02/15/2000
• Est. Priority Date: 05/06/1998
• Status: Expired due to Fees

• Current Assignee: TRW Limited (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: TRW Limited (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Rayford, Joan F.
• Primary Examiner(s): Vu, David H.
• Assistant Examiner(s): CHEN, SHIH CHAO
• Application Number:
  US09/073,520
• Time in Patent Office: 650 Days
• Field of Search: 343/718, 343/877, 343/901, 343/903, 343/702, 340/825.31
• US Class Current: 343/877
• CPC Class Codes: H01Q 1/22 by structural association with other equipment or articles
• CPC Class Codes: H01Q 1/3233 particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

A transmitter (12) for a remote control convenience system (10) has a housing (22). A pushbutton (e.g., one of 24-30) is located on the sousing (22) and is manually actuatable for requesting remote control performance of a function by a remotely located receiver (14). Transmit circuitry (32) of the transmitter (12) is located within the housing (22) and is operatively connected to the pushbuttons (e.g., one of 24-30). The transmit circuitry (32) outputs an electrical signal that conveys a message requesting performance of the function in response to actuation of the pushbutton. A flexible antenna (34) is operatively connected to receive the electrical signal from the transmit circuitry (32) and to output a signal (18) intended for reception by the receiver (14). The antenna (34) has a stored position coiled inside the housing (22) and an extended position extending outside of the housing. A rotatable spool (42) supports the antenna (34) within the housing (22), and permits extension and retraction of the antenna relative to the housing (22).

Claims

1. A transmitter unit for a remote control convenience system, said transmitter unit comprising:

a housing;

at least one selector located on the housing and manually actuatable for requesting remote control performance of a function by a remotely located receiver;

transmit circuitry located within said housing operatively connected to said at least one selector for outputting an electrical signal, conveying a message requesting performance of the function, in response to actuation of said at least one selector;

a flexible antenna operatively connected to receive the electrical signal from said transmit circuitry and outputting a signal intended for reception by the receiver and conveying the message requesting performance of the function, said antenna having a stored coiled position inside said housing and an extended position extending outside of said housing; and

means for mounting said antenna to said housing permitting withdrawal and retraction of said antenna relative to said housing between the stored coiled position and the extended position;

wherein said means for mounting said antenna includes a spool that is rotatable relative to said housing, said antenna has two ends, one end of the antenna is attached to said spool, and said transmitter unit further including pull means attached to the other end of said antenna so that pulling of said pull means extends the antenna, said pull means is a ring.

2. The transmitter unit as set forth in claim 1, wherein said spool is enclosed within said housing, said housing has a hole, and said antenna extends from said spool through said hole in said housing.

3. A transmitter unit as set forth in claim 1 including means for biasing said spool toward the stored coil position.

4. A transmitter unit for a remote control convenience system, said transmitter unit comprising:

a housing;

at least one selector located on the housing and manually actuatable for requesting remote control performance of a function by a remotely located receiver;

transmit circuitry located within said housing operatively connected to said at least one selector for outputting an electrical signal, conveying a message requesting performance of the function, in response to actuation of said at least one selector;

a flexible antenna operatively connected to receive the electrical signal from said transmit circuitry and outputting a signal intended for reception by the receiver and conveying the message requesting performance of the function, said antenna having a stored coiled position inside said housing and an extended position extending outside of said housing; and

means for mounting said antenna to said housing permitting withdrawal and retraction of said antenna relative to said housing between the stored coiled position and the extended position;

wherein said means for mounting said antenna includes a spool that is rotatable relative to said housing, said antenna has two ends, one end of the antenna is attached to said spool, and said transmitter unit further including pull means attached to the other end of said antenna so that pulling of said pull means extends the antenna, said pull means includes means for attachment of said pull means to an article of clothing.

5. The transmitter unit as set forth in claim 4, wherein said spool is enclosed within said housing, said housing has a hole, and said antenna extends from said spool through said hole in said housing.

6. The transmitter unit as set forth in claim 5 including means for biasing said spool toward the stored coil position.

7. A method of requesting remote control performance of a convenience function by a receiver, said method comprising:

anchoring a pull element of a remote control transmitter;

grasping a housing of the transmitter;

pulling the pull element relative to the housing so that the housing and the pull element relatively move apart so as to extend a stored coiled antenna that has one end connected to the anchored pull element;

actuating a selector located on the housing that corresponds to the desired remote convenience function; and

transmitting, in response to the actuated selector, from the extended antenna a signal from the transmitter intended for the receiver that conveys a message requesting performance of the remote convenience function;

wherein said step of anchoring a pull element includes attaching the pull element to an article of clothing.

8. The method as set forth in claim 7, wherein the step of pulling includes rotating a spool that hold coils of the antenna relative to the housing.

9. The method as set forth in claim 7, wherein said step of pulling the pull element includes pulling the antenna through a hole in the housing.

10. The method as set forth in claim 7 further including the step of biasing said spool against said rotation.