Piezoelectric stick pointing device

• US 6,304,247 B1
• Filed: 03/02/1999
• Issued: 10/16/2001
• Est. Priority Date: 03/02/1999
• Status: Expired due to Fees

• Current Assignee: Minebea Company Limited (MinebeaMitsumi Inc.)
• Original Assignee: CTS Corporation
• Inventors: Black, Marc A.
• Primary Examiner(s): CHANG, KENT WU
• Application Number:
  US09/260,345
• Time in Patent Office: 959 Days
• Field of Search: 345/157, 345/161, 345/156
• US Class Current: 345/161
• CPC Class Codes: G06F 3/0338 with detection of limited linear or angular displacement of an operating part of the device from a neutral position, e.g. isotonic or isometric joysticks

Abstract

A pointing and signaling device for controlling the positioning, movement and operation of a cursor on a display screen that has a single piezoelectric element to indicate movement in three axes. The device generates electrical signals in response to a users force or actuation. The device has an actuator attached to a base. A piezoelectric element is mounted between the actuator and the base for generating electrical signals representative of a magnitude and direction of force applied to the actuator. The piezoelectric element is a shaped as a hollow cylinder. The piezoelectric element includes several conductive traces located on an outer surface of the element and a ground plate located on the inner surface of the element. The conductive plates and the ground plate are connected to a flexible cable by solder.

Claims

1. A device for generating electrical signals responsive to a users actuation thereof, comprising:

a) an actuator;

b) a base having the actuator mounted thereto;

c) a piezoelectric element, mounted between the actuator and the base, for generating electrical signals representative of a magnitude and direction of force applied to the actuator; and

d) a plurality of conductive traces disposed on a first surface of the element; and

e) a around plate disposed on a second surface of the element.

2. The device according to claim 1, wherein the piezoelectric element is cylindrical shaped and has a bore passing therethrough, the first surface located on the outside of the element and the second surface located inside the bore.

3. The device according to claim 1, wherein the traces are each electrically connected to a flexible cable by a solder joint.

4. The device according to claim 1, wherein the ground plate is electrically connected to a flexible cable by a solder joint.

5. The device according to claim 1, wherein the actuator extends through the bore.

8. The device according to claim 1, wherein the electrical connection means is solder connected between the traces, the ground plate and a plurality of circuit lines on the flexible cable.

6. A device for generating electrical signals indicative of forces applied to the device by a user, comprising:

a) an actuator;

b) a base having the actuator mounted thereto; and

c) a piezoelectric element, mounted between the actuator and the base, for generating electrical signals representative of a magnitude and direction of force applied to the actuator including;

a) a plurality of conductive traces disposed on a first surface of the piezoelectric element; and

b) a ground plate disposed on a second surface of the piezoelectric element; and

d) a flexible cable having circuit lines thereon, the conductive traces and the ground plate electrically connected to the circuit lines.

7. A device for generating electrical signals in response to forces applied thereon, the device connected to a flexible cable comprising:

a) an actuator;

b) a base having the actuator mounted thereto;

c) piezoelectric means, mounted between the actuator and the base, for generating electrical signals representative of a magnitude and direction of force applied to the actuator, the piezoelectric means includes a piezoelectric element having a plurality of conductive traces disposed on a first surface of the element and a ground plate disposed on a second surface of the element; and

d) electrical connection means, connected to the piezoelectric means and to the flexible cable for routing the electrical signals from the piezoelectric means to the flexible cable.