Speaker system, electronic apparatus using same, and mobile body device

• US 8,818,006 B2
• Filed: 09/25/2013
• Issued: 08/26/2014
• Est. Priority Date: 05/18/2011
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Okuyama, Masatoshi, Nakajima, Shoji, Takayama, Satoshi, Koura, Satoshi, Yamauchi, Kenji, Shimokawatoko, Yachiyo, Oshika, Kazuhiro, Inoue, Hideaki
• Primary Examiner(s): Eason, Matthew
• Assistant Examiner(s): Nguyen, Sean H
• Application Number:
  US14/035,956
• Publication Number:
  US 20140029779A1
• Time in Patent Office: 335 Days
• Field of Search: 381/152, 381/186, 381/386, 381/395, 381/409, 381/424, 381/335, 381/342
• US Class Current: 381/152
• CPC Class Codes: B60R 11/0217 for loud-speakers
• CPC Class Codes: H04N 5/642 Disposition of sound reproducers
• CPC Class Codes: H04R 1/02 Casings; Cabinets ; Supports therefor; Mountings therein H04R1/28 takes precedence ; attachments for microphones H04R1/08; mounting of transducers in earpieces H04R1/1075
• CPC Class Codes: H04R 1/227 using transducers reproducing the same frequency band
• CPC Class Codes: H04R 1/2803 for loudspeaker transducers
• CPC Class Codes: H04R 2499/13 Acoustic transducers and sound field adaptation in vehicles
• CPC Class Codes: H04R 2499/15 Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops

Abstract

A loudspeaker system includes an enclosure surrounding a plurality of loudspeakers. The plurality of loudspeakers are disposed in series along a straight line in the enclosure. The enclosure includes a front panel, a back panel and side panels. The front panel, the side panels, and the back panel are disposed parallel to the straight line on which the loudspeakers are arranged. The side panels are provided with a front slit and a back slit. The back slit is disposed at an opposite side of the front slit in the enclosure. Sounds emitted to the upper and lower sides of diaphragms of the loudspeakers are separated from each other such that the sounds are prevented from mixing with each other. This provides a loudspeaker system capable of achieving desired sound pressure-frequency characteristics.

Claims

1. A loudspeaker system comprising:

a plurality of loudspeakers; and

an enclosure surrounding the plurality of loudspeakers,

wherein each of the plurality of loudspeakers includes;

a rectangular frame having a first side and a second side shorter than the first side;

a diaphragm coupled to an outer periphery of the frame;

a magnetic circuit coupled to an inner periphery of the frame and provided with a magnetic gap; and

a voice coil coupled to a periphery of the diaphragm and disposed in the magnetic gap,

wherein the plurality of loudspeakers are disposed in series such that the first sides of the plurality of loudspeakers are in a straight line in the enclosure,

wherein the enclosure includes;

a front panel disposed facing the diaphragms of the plurality of loudspeakers and parallel to the straight line above the diaphragms;

a back panel disposed facing the front panel and parallel to the straight line below the diaphragms of the loudspeakers; and

side panels bonding the front panel and the back panel to each other and provided parallel to the straight line,

wherein the side panels are provided with a front slit communicated with an upper-side space above the diaphragms in the enclosure, and a back slit for emitting a sound emitted to a lower side of the diaphragms to outside of the enclosure, the back slit is disposed at an opposite side to the front slit in the enclosure, and a length of each of the front slit and back slit is substantially equal to a length of its respective side panel,

wherein a length of each of the second sides of the frames of the plurality of loudspeakers is substantially same as a distance between the side panels.

2. The loudspeaker system according to claim 1, wherein the back panel is provided with a wiring unit.

3. The loudspeaker system according to claim 2, wherein the wiring unit is printed wiring.

4. The loudspeaker system according to claim 3, wherein the back panel is formed of a printed board.

5. The loudspeaker system according to claim 1, wherein the front panel and the side panels are made of same material and unitarily formed with each other, or the back panel and the side panels are made of same material and unitarily formed with each other.

6. The loudspeaker system according to claim 1, wherein the loudspeakers are fixed to the back panel.

7. The loudspeaker system according to claim 1, wherein the loudspeakers are electrically connected to the back panel.

8. The loudspeaker system according to claim 1, wherein the enclosure is provided with partitions for partitioning the individual loudspeakers.

9. The loudspeaker system according to claim 8, wherein the partitions are provided on at least any one of the front panel and the back panel.

10. The loudspeaker system according to claim 3, wherein each of the loudspeakers includes a terminal having a spring property, and the terminal is urged to the printed wiring for electrically connecting each of the loudspeakers to the printed wiring.

11. The loudspeaker system according to claim 1, wherein a first side of each of the plurality of loudspeakers is longer than a second side of each of the plurality of loudspeakers.

12. The loudspeaker system according to claim 1, wherein attaching parts for mounting the loudspeaker on a set are provided on both ends of the enclosure.

13. The loudspeaker system according to claim 1, wherein the outer dimension in the thickness direction of the enclosure is larger than a dimension including the outer dimension in the thickness direction of the loudspeakers plus thicknesses of the front panel and the back panel, and the outer dimension in the thickness direction of the enclosure is 10 mm or less.

14. The loudspeaker system according to claim 1, wherein the enclosure has a first side and a second side shorter that the first side, and the outer dimension of the second side of the enclosure falls within 1 to 1.5 times, inclusive of the outer dimension in the lateral direction of the loudspeakers.

15. The loudspeaker system according to claim 1, wherein eight of the loudspeakers are housed in the enclosure.

16. The loudspeaker system according to claim 1, wherein at least one of the front slit and the back slit is covered with a dust-proof net.

17. An electronic apparatus comprising an outer frame, a loudspeaker system as defined in claim 1 housed in the outer frame.

18. The electronic apparatus according to claim 17, further comprising a display module.

19. The electronic apparatus according to claim 18, wherein the loudspeaker system is one of loudspeaker systems, the electronic apparatus comprises the loudspeaker systems, each of the enclosures of the loudspeaker systems has a first side and a second side shorter than the first side, the enclosures of the loudspeaker systems are disposed in left and right parts of an outer frame of the display module, and mounted in such a manner that the first side of the enclosure is oriented along a vertical direction of the electronic apparatus.

20. The electronic apparatus according to claim 18, wherein the enclosure of the loudspeaker system has a first side and a second side shorter that the first side, the enclosure is disposed in an upper part or a lower part of the outer frame of the display module, and mounted in such a manner that the first side of the enclosure is oriented along a lateral direction of the electronic apparatus.

21. The electronic apparatus according to claim 18, wherein the enclosure is disposed in such a direction that a sound is emitted in a direction that is a same direction as a display direction of the display module.

22. The electronic apparatus according to claim 18, wherein the enclosure is disposed in such a direction that a sound is emitted in a direction that is perpendicular to the display direction of the display module.

23. A mobile device comprising:

a movable main body, and

the loudspeaker system as defined in claim 1 housed in the main body.