INFORMATION PROCESSING DEVICE AND SPEAKER UNIT APPLICABLE THERETO

• US 20020018574A1
• Filed: 09/10/1998
• Published: 02/14/2002
• Est. Priority Date: 05/15/1998
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: TANAKA, WATARU, OKUNO, HIDEYUKI
• Granted Patent: US 6,792,126 B2
• Time in Patent Office: Days
• US Class Current: 381/333
• CPC Class Codes: H04R 11/02 Loudspeakers

Abstract

The present invention relates to an information processing device and a speaker unit applicable to the device. In one aspect of the present invention, the device includes a housing, a pole piece, a voice coil, a magnet, and a frame. The housing has an elastically vibratory vibration region. The pole piece has a first end and a second end. The first end is fixed to the vibration region of the housing. The voice coil is fixed to the second end of the pole piece. The magnet forms a magnetic field interlinking the voice coil. The frame fixes the magnet to the housing at a region other than the vibration region, for example. With this configuration, vibration of the voice coil due to a current flowing through the voice coil is transmitted through the pole piece to the vibration region of the housing, thus eliminating the need for a vibration board of a speaker and further eliminating the need for formation of holes for sound transmission through the housing.

Claims

1. An information processing device comprising:

a housing having an elastically vibratory vibration region;

a pole piece having a first end and a second end, said first end being fixed to said vibration region;

a voice coil fixed to said second end of said pole piece;

a magnet for forming a magnetic field interlinking said voice coil; and

a frame for fixing said magnet to said housing.

2. An information processing device according to claim 1, wherein said vibration region of said housing has a thickness smaller than that of a region of said housing other than said vibration region.

3. An information processing device according to claim 1, wherein said frame fixes said magnet to said housing at a region other than said vibration region.

4. An information processing device according to claim 1, wherein said housing has an airtight structure.

5. An information processing device according to claim 1, wherein said housing comprises a first housing having a keyboard unit and a second housing having a display unit, said second housing being openable and closable with respect to said first housing;

said vibration region being defined in the vicinity of said display unit of said second housing.

6. An information processing device according to claim 1, wherein said housing is formed of resin.

7. An information processing device according to claim 1, further comprising a damper for displaceably supporting said pole piece to said frame.

8. A speaker unit comprising:

a pole piece having a first end and a second end, said first end being adapted to be fixed to a vibration region of a housing;

a voice coil fixed to said second end of said pole piece;

a magnet for forming a magnetic field interlinking said voice coil;

a frame for fixing said magnet to said housing; and

a damper for displaceably supporting said pole piece to said frame.

9. A speaker unit according to claim 8, wherein said frame fixes said magnet to said housing at a region other than said vibration region.

10. An information processing device comprising:

a housing having an elastically vibratory vibration region;

a magnet fixed to said vibration region;

a voice coil provided so as to interlink a magnetic field formed by said magnet; and

a frame for fixing said voice coil to said housing.

11. An information processing device according to claim 10, wherein said frame fixes said voice coil to said housing at a region other than said vibration region.

12. An information processing device according to claim 10, wherein said vibration region of said housing has a thickness smaller than that of a region of said housing other than said vibration region.

13. An information processing device according to claim 10, wherein said housing has an airtight structure.

14. An information processing device according to claim 10, wherein said housing comprises a first housing having a keyboard unit and a second housing having a display unit, said second housing being openable and closable with respect to said first housing;

said vibration region being defined in the vicinity of said display unit of said second housing.

15. An information processing device according to claim 10, wherein said housing is formed of resin.

16. An information processing device according to claim 10, further comprising a damper for displaceably supporting said magnet to said frame.

18. A speaker unit according to claim 17, wherein said frame fixes said voice coil to said housing at a region other than said vibration region.

17. A speaker unit comprising:

a magnet adapted to be fixed to a vibration region of a housing;

a voice coil provided so as to interlink a magnetic field formed by said magnet;

a frame for fixing said voice coil to said housing; and

a damper for displaceably supporting said magnet to said frame.