JPS6427399A - Rectangular flat speaker - Google Patents
Rectangular flat speakerInfo
- Publication number
- JPS6427399A JPS6427399A JP18403287A JP18403287A JPS6427399A JP S6427399 A JPS6427399 A JP S6427399A JP 18403287 A JP18403287 A JP 18403287A JP 18403287 A JP18403287 A JP 18403287A JP S6427399 A JPS6427399 A JP S6427399A
- Authority
- JP
- Japan
- Prior art keywords
- axis direction
- major axis
- diaphragm
- minor axis
- resonance mode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
PURPOSE:To make the sound pressure versus frequency characteristic flat over a wide range by making a diameter of an upper large diameter part of nearly truncated drive cone nearly equal to the interval of nodes of the primary resonance mode in the minor axis direction of a diaphragm and selecting the stiffness at the root of the drive cone to be larger in the minor axis direction than in the major axis direction of the diaphragm thereby erasing sufficiently the primary resonance mode. CONSTITUTION:A voice coil 6 is arranged at a point suppressing both the primary and secondary free resonance modes of the diaphragm in the major axis direction. Thus, the resonance in the major axis direction is not caused up to a frequency f03 where the ternary resonance mode is taken place. Moreover, a flat part 14 formed to be an ellipse shape provided to the lower part of the drive cone 13 is formed to be short in the major axis direction of the upper ellipse and longer in the minor axis direction. Thus, the stiffness of the root of the drive cone 13 being inversely proportional to the length of the flat part is larger in the major axis direction of the upper ellipse and a drive torque is mainly transmitted to the outside/inside of nodes of the primary resonance mode in the minor axis direction while being distributed. Thus, the primary resonance mode in the minor axis direction is suppressed, then the piston motion band of the diaphragm 10 is expanded to further higher resonance modes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18403287A JPS6427399A (en) | 1987-07-23 | 1987-07-23 | Rectangular flat speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18403287A JPS6427399A (en) | 1987-07-23 | 1987-07-23 | Rectangular flat speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6427399A true JPS6427399A (en) | 1989-01-30 |
Family
ID=16146164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18403287A Pending JPS6427399A (en) | 1987-07-23 | 1987-07-23 | Rectangular flat speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6427399A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6411723B1 (en) | 1998-06-22 | 2002-06-25 | Slab Technology Limited | Loudspeakers |
| KR20040032028A (en) * | 2002-10-08 | 2004-04-14 | 신교원 | Flat type speaker system |
| US20110211725A1 (en) * | 2008-11-19 | 2011-09-01 | Hiroyuki Takewa | Loudspeaker and electronic device including loudspeaker |
| JP2014022860A (en) * | 2012-07-17 | 2014-02-03 | Yoshikazu Eguchi | Speaker unit |
| KR20190139498A (en) | 2018-06-08 | 2019-12-18 | 이은호 | Diaphragm assembly and speaker assembly having the same |
| KR20190139496A (en) | 2018-06-08 | 2019-12-18 | 이은호 | Suspension and speaker assembly having the same |
| KR20190139499A (en) | 2018-06-08 | 2019-12-18 | 이은호 | Frame and speaker assembly |
| KR20190139497A (en) | 2018-06-08 | 2019-12-18 | 이은호 | Suspension and speaker assembly having the same |
| US11350216B2 (en) | 2017-02-06 | 2022-05-31 | Sony Corporation | Speaker diaphragm and speaker apparatus |
-
1987
- 1987-07-23 JP JP18403287A patent/JPS6427399A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6411723B1 (en) | 1998-06-22 | 2002-06-25 | Slab Technology Limited | Loudspeakers |
| KR20040032028A (en) * | 2002-10-08 | 2004-04-14 | 신교원 | Flat type speaker system |
| US20110211725A1 (en) * | 2008-11-19 | 2011-09-01 | Hiroyuki Takewa | Loudspeaker and electronic device including loudspeaker |
| US8422723B2 (en) * | 2008-11-19 | 2013-04-16 | Panasonic Corporation | Loudspeaker and electronic device including loudspeaker |
| JP2014022860A (en) * | 2012-07-17 | 2014-02-03 | Yoshikazu Eguchi | Speaker unit |
| US11350216B2 (en) | 2017-02-06 | 2022-05-31 | Sony Corporation | Speaker diaphragm and speaker apparatus |
| KR20190139498A (en) | 2018-06-08 | 2019-12-18 | 이은호 | Diaphragm assembly and speaker assembly having the same |
| KR20190139496A (en) | 2018-06-08 | 2019-12-18 | 이은호 | Suspension and speaker assembly having the same |
| KR20190139499A (en) | 2018-06-08 | 2019-12-18 | 이은호 | Frame and speaker assembly |
| KR20190139497A (en) | 2018-06-08 | 2019-12-18 | 이은호 | Suspension and speaker assembly having the same |
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