Vibrating device for axially vibrating a movable member

• US 7,023,112 B2
• Filed: 01/10/2003
• Issued: 04/04/2006
• Est. Priority Date: 01/29/2002
• Status: Expired due to Fees

• Current Assignee: Citizen Electronics Company Limited
• Original Assignee: Citizen Electronics Company Limited
• Inventors: Miura, Naoki, Miyamoto, Kazumi, Aihara, Kenshi
• Primary Examiner(s): Tamai, Karl
• Assistant Examiner(s): JONES, JUDSON
• Application Number:
  US10/339,352
• Publication Number:
  US 20030142845A1
• Time in Patent Office: 1,180 Days
• Field of Search: 310 12- 14, 310/15, 310/17
• US Class Current: 310/12.31
• CPC Class Codes: H02K 33/16 with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
• CPC Class Codes: H04R 11/02 Loudspeakers
• CPC Class Codes: H04R 2499/11 Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Abstract

A vibrating device has an axially elongated frame, and a vibrating assembly including a hollow yoke. A magnetic driving device is provided for axially vibrating the vibrating assembly. A supporting shaft is provided for axially slidably supporting the vibrating assembly in the frame.

Claims

1. A vibrating device comprising:

an axially elongated frame;

a vibrating assembly including a hollow yoke having an opening at an end thereof, a weight secured to the yoke, and a permanent magnet secured to the yoke;

a magnetic driving device including a coil bobbin cantilevered in the frame and having an end portion inserted in the yoke from the opening, a driving coil mounted on the coil bobbin;

a pair of springs provided respectively at both ends of the vibrating assembly inside walls of the frame for resiliently holding the vibrating assembly in the frame; and

at least one supporting shaft axially movably mounted in the frame to be engaged with at least one axial hole of the vibrating assembly so as to axially slidably support the vibrating assembly in the frame.

2. The device according to claim 1 wherein the supporting shaft is axially slidably mounted in the frame, and the vibrating assembly is secured to the supporting shaft.

3. The device according to claim 1 wherein the supporting shaft is secured to the frame, and the vibrating assembly slidably mounted on the supporting shaft.

4. The device according to claim 1 wherein the supporting shaft comprises a pair of shafts, the shafts are secured to axial both ends of the vibrating assembly, and slidably mounted in the frame.

5. The device according to claim 3 wherein the supporting shaft has a small diameter portion at a central portion of the shaft.