Exciter for generating vibration in a pager

• US 5,668,423 A
• Filed: 03/21/1996
• Issued: 09/16/1997
• Est. Priority Date: 03/21/1996
• Status: Expired due to Fees

• Current Assignee: Microtech Systems Incorporated (Financière Cyclope SAS)
• Original Assignee: Dong-Ok You, Ok-Jung You
• Inventors: You, Dong-Ok, You, Ok-Jung
• Primary Examiner(s): Stephan, Steven L.
• Assistant Examiner(s): Nguyen, Tran N.
• Application Number:
  US08/619,397
• Time in Patent Office: 544 Days
• Field of Search: 310/81, 310/80, 310/164, 310/89, 310/156, 310/261, 310/40 MM, 340/407.1, 340/311.1, 340/825.44
• US Class Current: 310/81
• CPC Class Codes: G08B 6/00 Tactile signalling systems, e.g. personal calling systems
• CPC Class Codes: H02K 21/14 with magnets rotating within the armatures
• CPC Class Codes: H02K 7/063 integrally combined with motor parts, e.g. motors with eccentric rotors
• CPC Class Codes: H02K 7/065 Electromechanical oscillators; Vibrating magnetic drives

Abstract

Disclosed is an exciter for generating physical vibration in response to the applied electric signal. In this device, a driving coil is attached to the periphery of an inner guide of a lower housing, and a rotor of permanent magnet is provided in the rotor-receiving space of the inner guide, both ends of the rotor being rotatably supported to the inner guide. An upper housing is engaged with the lower housing in such a manner that the upper housing surrounds the driving coil. In this device, the rotation shaft of the rotor is on a shifted state with respect to a center of a gravity of the rotor, by which means the exciter generates vibration through the upper and lower housings when the rotor rotates by the electromagnetic force of the driving coil.

Claims

1. An exciter for generating physical vibration in response to an incoming call, comprising:

a lower housing having a base and a cylindrical inner guide which is vertically disposed on the base, the inner guide having an inner wall and an upper opening to form a predetermined space at a central portion;

a stator, attached to a periphery of the an inner guide of the lower housing, for generating an electromagnetic force which is converted in an upper or lower direction responsive to an AC signal from the outside;

a rotor having a rotation part disposed in an inner space of the inner guide, the rotation part comprising an axial guide having two ends, said ends being rotatably supported by the inner wall of the inner guide, for rotating responsive to the electromagnetic force; and

an upper housing having a pair of downwardly projecting portions engaged with the inner guide of the lower housing to rotatably support both said ends of the axial guide, and an outer cylindrical portion engaged with the lower housing to surround the stator, whereby the exciter generates vibration at the upper and lower housings responsive to a rotation movement of the rotation part.

2. An exciter of claim 1, wherein the stator comprises a driving coil wound on an peripheral surface of the inner guide of the lower housing.

3. An exciter of claim 1, wherein the rotor comprises:

a permanent magnet;

a permanent magnet;

a magnet housing surrounding the permanent magnet; and

said two ends of the axial guide oppositely disposed on two sides of the magnet housing to function as a rotation shaft of the permanent magnet.

4. An exciter of claim 3, wherein said two ends of the axial guide of the rotor are on a horizontal line passing through a center of a gravity of the permanent magnet, and the upper housing further comprising an inner guide, wherein a pair of opposite projecting parts, disposed on an inner side of the inner guide of the upper housing for defining the rotation movement of the rotor and transmitting shocks resulted from the rotation movement.

5. An exciter of claim 3, wherein said two ends of the axial guide of the rotor are on a line shifted in parallel from a horizontal line passing through a center of a gravity of the permanent magnet.

6. An exciter of claim 3, wherein said two ends of the axial guide of the rotor are on a line rotated in an clockwise or counterclockwise direction as much as a predetermined angle from a horizontal line passing through a center of a gravity of the permanent magnet, on a basis of the center of its gravity.

7. An exciter of claim 1, wherein a center of a gravity of the rotor is shifted from a connection line of both said ends of the axial guide.

8. An exciter of claim 1, wherein the rotor comprises the rotation part made of a permanent magnet and the axial guide functions as a shaft attached to the rotation part.

9. An exciter of claim 1, wherein the rotor has an asymmetry structure in view of an connection line of both said ends of the axial guide.

10. An exciter of claim 1, further comprising a vibration transmission material of fluid, charged in the inner space of the inner guide, for transferring the rotating force of the rotor to the upper and lower housings.

11. An exciter of claim 1, wherein the inner guide of the lower housing has a pair of grooves, to which both said ends of the axial guide are inserted.

12. An exciter of claim 1, further comprising a pair of electrode embedded in the base of the lower housing and electrically connected to the rotor, for receiving the AC signal from outside.

13. An exciter of claim 12, wherein each electrode comprises any one selected from a plate type, rugged type and wire type.

14. An exciter of claim 1, wherein the base of the lower housing is rectangular-shaped.

15. An exciter of claim 1, wherein the base of the lower housing is round-shaped.

16. An exciter for generating physical vibration in response to transmitted signal, comprising:

a lower housing having a base, an inner guide which is vertically disposed on the base, the inner guide forming a predetermined space inside, and an outer guide which is vertically disposed with a regular interval from the inner guide;

a driving coil, disposed between the inner guide and the outer guide of the lower housing, for generating an electromagnetic force; and

a moving magnet having a shaft which is rotatably supported by the inner guide of the lower housing, for rotating in response to the electromagnetic force; and

an upper housing having projecting portions engaged with the inner guide of the lower housing and a cylindrical member engaged with the outer guide of the lower housing for surrounding the driving coil, the projecting portions supporting the shaft of the moving magnet with respect to an upper direction,

wherein a center of a gravity of the moving magnet is positioned on a shifted state from the shaft.