WO2006027860A1 - スピーカ - Google Patents
スピーカ Download PDFInfo
- Publication number
- WO2006027860A1 WO2006027860A1 PCT/JP2005/000864 JP2005000864W WO2006027860A1 WO 2006027860 A1 WO2006027860 A1 WO 2006027860A1 JP 2005000864 W JP2005000864 W JP 2005000864W WO 2006027860 A1 WO2006027860 A1 WO 2006027860A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diaphragm
- wall member
- speaker
- vibration
- sound
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
Definitions
- the present invention relates to a speaker, and more particularly to a speaker that emits sound waves by vibrating a diaphragm, such as a dynamic speaker or an electromagnetic speaker using a voice coil.
- FIG. 10 is a perspective view showing an example of a conventional speaker device.
- the speaker device 1 includes a cabinet 2.
- a low-frequency speaker 3, a high-frequency speaker 4, a mid-range speaker 5 and the like are attached to the front panel of the cabinet 2.
- the diaphragms of these speakers 3, 4, and 5 vibrate, sound waves are radiated in the respective frequency regions.
- the bass speaker 3 includes a cone-like diaphragm 6 that is reciprocally vibrated by a voice coil (not shown).
- An inner bottom portion of the diaphragm 6 is connected to the frame 8 via the damper 7, and an end portion on the large diameter side of the diaphragm 6 is connected to the frame 8 via the cone edge 9.
- a duct 10 is formed inward from the front plate of the cabinet 2, and a bass speaker 3 is attached to the duct 10 inside the cabinet 2 (see Patent Document 1).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-232232
- a main object of the present invention is to provide a speaker capable of reproducing a bass having a small diameter and without distortion. Means for solving the problem
- the present invention includes a diaphragm that radiates sound waves in the vibration direction by oscillating in a direction that intersects the plane, and a wall member that is disposed on the sound wave radiation side of the diaphragm.
- the speaker is characterized in that the diaphragm is fixed, and the wall member vibrates together with the vibration of the diaphragm.
- the inner wall surface of the wall member is preferably configured to be substantially parallel to the vibration direction of the diaphragm.
- the wall member can be arranged in a frame shape so as to surround the sound wave radiation side of the diaphragm.
- the wall member can have a force S having a cross section substantially the same shape as the outer periphery of the sound wave emitting surface of the diaphragm.
- a plurality of wall members may be arranged concentrically with the center of the diaphragm as a reference. Furthermore, the height of the wall surface of the wall member is preferably configured to be approximately the same as the maximum amplitude of the diaphragm.
- the present invention also includes a diaphragm that radiates sound waves in the vibration direction by vibrating in a direction intersecting the surface, and a parallel connection on the sound wave radiation side of the diaphragm.
- a plurality of cylindrical bodies having an inner wall surface parallel to the vibration direction, the cylindrical body and the diaphragm are fixed, and the cylindrical body vibrates with the vibration of the diaphragm. It is power.
- the height of the cylindrical body is preferably configured to be approximately the same as the maximum amplitude of the diaphragm.
- the present inventor compressed the air on the sound wave emitting surface of the vibration plate for a moment by vibration of the vibration plate instead of the vibration of the vibration plate as it is. It was discovered that the impact generated by the compressed air being released at once, that is, expanding (exploding), propagates and is detected as sound. Therefore, in the present invention, the vibration of the diaphragm is provided by providing a speaker having a wall member fixed to the diaphragm on the sound wave radiation side of the diaphragm and configured to vibrate the wall member together with the vibration of the diaphragm. This prevents the compressed air from leaking out from the sound wave emitting surface (front surface) of the diaphragm to the side. It is.
- a wall member that vibrates with the diaphragm is formed on the sound wave radiation side of the diaphragm so that the air compressed by the diaphragm does not flow laterally from the sound wave radiation surface of the diaphragm.
- the wall member is preferably formed in a frame shape surrounding the sound wave emitting surface of the diaphragm so that the air captured by the sound wave emitting surface of the diaphragm does not flow out.
- the inner part of the diaphragm which is only the outer peripheral part, may be divided into a plurality of sections by a wall member.
- a wall member having a cross section similar to the outer periphery of the diaphragm can be arranged concentrically with the center of the diaphragm as a reference.
- the area of the portion surrounded by the wall member is reduced, and air is captured inside the wall member without flowing, and more accurate. Sound playback is possible. Further, by exhibiting the effect as the wall member S rib, the rigidity of the diaphragm is increased, and deformation such as undulation of the diaphragm can be prevented, so that accurate sound reproduction is possible.
- the height of the wall member be approximately the same as the maximum amplitude of the diaphragm so that air compressed by vibration of the diaphragm does not escape from the sound wave emitting surface.
- a wall member in which a plurality of cylindrical bodies such as a honeycomb shape are connected in parallel may be formed on the sound wave emission surface of the diaphragm.
- the height of the cylindrical body is formed to be approximately the same as the maximum amplitude of the diaphragm so that the air compressed by the vibration of the diaphragm does not escape from the sound wave emitting surface. It is preferred that
- FIG. 1 is a perspective view showing an example of a speaker device using the speaker of the present invention.
- FIG. 2 is an illustrative view showing a structure of the speaker device shown in FIG. 1.
- FIG. 3 is an illustrative view showing a diaphragm and a wall member of the speaker used in the speaker device shown in FIG. 2.
- FIG. 4 is an illustrative view showing a relationship between vibration of the diaphragm shown in FIG. 3 and air compression.
- FIG. 5 is an illustrative view showing a relationship between vibration of a conventional diaphragm and air compression for comparison with the present invention.
- FIG. 6 is an illustrative view showing another example of a diaphragm and a wall member used in the speaker of the present invention.
- FIG. 7 is an illustrative view showing a structure of a speaker using the diaphragm and the wall member shown in FIG.
- FIG. 8 is a plan view showing still another example of a wall member used in the speaker of the present invention.
- FIG. 9 is an illustrative view showing a diaphragm to which the wall member shown in FIG. 8 is attached.
- FIG. 10 is a perspective view showing an example of a speaker device using a conventional speaker.
- FIG. 11 is an illustrative view showing one example of a conventional speaker used in FIG.
- FIG. 1 is a perspective view showing an example of a speaker device using the speaker of the present invention.
- the speaker device 20 includes a cabinet 22.
- the cabinet 22 is formed in a rectangular parallelepiped box shape, for example, and a circular opening is formed on one surface 22a thereof.
- a speaker 30 is attached to the inside of the cabinet 22 toward the opening.
- the speaker 30 has a permanent magnet 32, and one end of the permanent magnet 32 is attached to the bottom surface in the yoke 34.
- the yoke 34 is formed using a magnetic material so as to surround the permanent magnet 32.
- a circular hole 36 is formed in the yoke 34 on the other end side of the permanent magnet 32.
- a cylindrical center pole 38 is attached to the other end of the permanent magnet 32, and the center pole 38 is formed to extend inside the hole 36 of the yoke 34.
- an annular space is formed between the yoke 34 and the center pole 38 inside the hole 36.
- a frame 40 that extends in a tapered shape is attached to the outside of the yoke 34 around the L 36, and the diaphragm 42 is disposed inside the frame 40.
- the diaphragm 42 is formed in a cone shape with paper or the like, and the end on the small diameter side is inserted into the gap between the yoke 34 and the center pole 38 .
- the end portion on the large diameter side of the diaphragm 42 is connected to a curved cone edge 44, and the end portion of the cone edge 44 is sandwiched and fixed between the end portion of the frame 40 and the arrow paper 46.
- the outer middle portion of the diaphragm 42 is connected to the frame 40 via the damper 48.
- a cap 50 having, for example, a part of a spherical surface is attached so as to cover the penetrating portion at the center of the diaphragm 42.
- the voice coil 52 is fixed to the diaphragm 42 in a gap portion between the yoke 34 and the center pole 38.
- the diaphragm 42 vibrates in a direction perpendicular to the plane covering the large-diameter end connected to the cone edge 44.
- a frame-like wall member 54 having the same cross-sectional shape as the outer peripheral portion of the diaphragm 42 is attached to the large diameter side end portion of the diaphragm 42, that is, the outer peripheral portion of the diaphragm 42. You can Here, when a cone-shaped diaphragm 42 as shown in FIG. 3 is used, a cylindrical wall member 54 is attached.
- the wall member 54 is formed such that at least the inner wall surface is parallel to the vibration direction of the diaphragm 42. Further, the height of the wall member 54 from the diaphragm 42 is formed to be approximately the same as the maximum amplitude of the diaphragm 42.
- the material of the wall member 54 can be made of the same material as the diaphragm 42, which is preferably light and strong, and other materials such as paper, resin, rubber, wood and metal are not particularly limited. Absent.
- One end of the cylindrical wall member 54 is fixed to the outer peripheral portion of the diaphragm 42.
- the outer peripheral force of the frame 40 of the speaker 30 is attached to the portion of the cabinet 22 where the opening portion of the one surface 22a is formed.
- the diaphragm 42 vibrates in a direction crossing the one surface 22 a of the cabinet 22, and sound waves are radiated in the vibration direction. .
- the diaphragm 42 moves together with the wall member 54 to the sound wave radiation side, that is, forward, so that the air on the front surface of the diaphragm 42 is compressed, and the compressed air flows into the wall member 54. It is perceived as sound by being released from the opening side and propagating the impact.
- the wall member 54 is formed on the outer peripheral portion of the diaphragm 42, so that it is compressed as shown by the dotted arrow in FIG. Air is prevented from flowing out from the front side of the diaphragm 42 to the side. Therefore, the air on the front surface of the diaphragm 42 can be reliably captured and compressed, and the compressed air can be efficiently opened forward. Therefore, it is possible to reproduce a sound faithful to the input signal from the low range to the high range, and in particular, it is possible to obtain a speaker that can reproduce the low range even with a small diameter.
- the force S in which the duct 10 is formed in front of the bass speaker 3, and the diaphragm 6 and the duct 10 of the bass speaker 3 are not fixed.
- the duct 10 is used for resonance to obtain a low sound, and there is a problem that sound is distorted by resonance.
- the height of the wall member 54 is approximately the same as the maximum amplitude of the diaphragm 42, and an undistorted sound that does not cause resonance is obtained. Can do.
- the height of the wall member 54 is equal to or less than the maximum amplitude of the vibration plate 42, it is possible to obtain a rebound effect by preventing the compressed air from flowing out. In order to capture all the air, it is preferable that the height of the vibration plate 42 be as high as the maximum amplitude.
- the wall member 54 having a height greater than the maximum amplitude of the diaphragm 42 may be formed as long as the vibration of the diaphragm 42 is not hindered. Good.
- a plurality of frame-like wall members 54 having a cross-sectional shape similar to the outer peripheral shape of the diaphragm 42 can be used to divide into a plurality of sections. .
- These wall members 54 are arranged concentrically with the center of the diaphragm 42 as a reference.
- These wall members 54 are all formed so as to have the same height as the maximum amplitude of the diaphragm 42. If the wall member 54 having the same height as the maximum distance traveled by the vibration plate is formed, the air can be reliably captured by the vibration of the vibration plate 54, and the air can be compressed and released.
- the diaphragm 42 having such a wall member 54 When the diaphragm 42 having such a wall member 54 is used, the area of the portion surrounded by the wall member 54 becomes smaller than when the wall member 54 is provided only on the outer peripheral portion of the diaphragm 42. Therefore, the air trapped by the vibration of the diaphragm 42 flows. Therefore, the air on the front surface of the diaphragm 42 can be compressed and released as it is, and sound without distortion can be reproduced. Furthermore, the wall member 54 formed on the surface of the diaphragm 42 exhibits an effect as a rib, and the rigidity of the diaphragm 42 is increased. For this reason, deformation such as undulation of the diaphragm 42 is less likely to occur, and sound reproduction faithful to the sound source is possible.
- a wall member 54 in which cylindrical bodies are connected in parallel may be used.
- a wall member 54 as shown in FIGS. 8 and 9, a honeycomb-like wall member 54 in which hexagonal tubes are connected in parallel can be used.
- This wall member 54 is also as high as the maximum amplitude of the diaphragm 42. It is formed to become.
- the wall member 54 is provided between the outer periphery of the diaphragm 42 and the outer periphery of the cap 50.
- the shape of the cylindrical body is not limited to a hexagonal cylindrical shape, but may be other shapes such as a rectangular cylindrical shape or a cylindrical shape.
- the wall member 54 on the diaphragm 42 the compression efficiency of air due to the vibration of the diaphragm 42 can be increased, and even the speaker 30 having the diaphragm 42 with a small diameter is provided.
- the wall member is preferably formed in the same shape as the outer periphery of the diaphragm. However, when the outer periphery of the diaphragm is a circle, the wall member may be formed in another shape such as a square shape. The effect of the present invention is achieved.
- the inner wall of the wall member is preferably parallel to the vibration direction of the diaphragm, but may be directed so as to cross the vibration direction of the diaphragm, that is, slightly inward.
- the present invention can also be applied to a speaker using a diaphragm that asymptotically spreads in the sound wave radiation direction, such as a morning glory that is a cone-shaped deformation type, with respect to a cone-shaped diaphragm.
- a wall member is provided at the tip of the morning glory diaphragm, and the tip of the diaphragm is a surface substantially perpendicular to the vibration direction of the diaphragm, so that the wall member is substantially parallel to the vibration direction.
- the wall member is arranged substantially perpendicular to the surface of the end portion of the diaphragm.
- the wall member may be arranged so as to be inclined slightly inward, that is, toward the center of the speaker so as to intersect the vibration direction.
- the present invention can be applied not only to a speaker having a cone-shaped diaphragm but also to a speaker having a flat diaphragm. Therefore, the wall member shown in FIGS. 8 and 9 can be formed on the entire surface when a force-plate-like diaphragm formed on the surface of the diaphragm around the cap is used.
- the planar shape thereof may be other shapes such as a quadrangular shape as well as a circular shape.
- the wall member formed on the outer peripheral portion of the diaphragm is formed in a quadrangular cylindrical shape in accordance with the shape of the diaphragm.
- the wall member is concentrically arranged with respect to the center of the diaphragm.
- the shape of the wall member is the same as the outer peripheral shape of the diaphragm. It is formed in a cylindrical shape having a cross section of the same shape or a similar shape.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Multimedia (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112005000074T DE112005000074B4 (de) | 2004-09-09 | 2005-01-24 | Lautsprecher |
US10/595,206 US20080260186A1 (en) | 2004-09-09 | 2005-01-24 | Speaker |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004262047 | 2004-09-09 | ||
JP2004-262047 | 2004-09-09 | ||
JP2005-013554 | 2005-01-21 | ||
JP2005013554A JP3753150B1 (ja) | 2004-09-09 | 2005-01-21 | スピーカ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006027860A1 true WO2006027860A1 (ja) | 2006-03-16 |
Family
ID=36036156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/000864 WO2006027860A1 (ja) | 2004-09-09 | 2005-01-24 | スピーカ |
Country Status (4)
Country | Link |
---|---|
US (1) | US20080260186A1 (ja) |
JP (1) | JP3753150B1 (ja) |
DE (1) | DE112005000074B4 (ja) |
WO (1) | WO2006027860A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10531170B2 (en) * | 2016-09-01 | 2020-01-07 | Panasonic Intellectual Property Management Co., Ltd. | Loudspeaker device and movable-body apparatus equipped with same |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5873694U (ja) * | 1981-11-14 | 1983-05-18 | ソニー株式会社 | 平面振動形スピ−カ |
JPS6440994U (ja) * | 1987-09-07 | 1989-03-10 | ||
JPH01147597U (ja) * | 1988-04-01 | 1989-10-12 | ||
JPH09163490A (ja) * | 1995-12-06 | 1997-06-20 | Masayuki Kimijima | エッジレススピーカー |
JP2001095079A (ja) * | 1999-09-20 | 2001-04-06 | Murata Mfg Co Ltd | スピーカ |
JP2002232984A (ja) * | 2001-01-30 | 2002-08-16 | Sanyo Electric Co Ltd | スピーカ装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2342177A (en) * | 1976-03-22 | 1978-09-21 | Babbco Ltd | Loudspeaker. ribbed cone and bearing supported voice coil |
JPS5568795A (en) * | 1978-11-20 | 1980-05-23 | Sony Corp | Speaker |
JPS5778299A (en) * | 1980-10-31 | 1982-05-15 | Houyuu Gomme Kk | Diaphragm for speaker |
-
2005
- 2005-01-21 JP JP2005013554A patent/JP3753150B1/ja active Active
- 2005-01-24 US US10/595,206 patent/US20080260186A1/en not_active Abandoned
- 2005-01-24 WO PCT/JP2005/000864 patent/WO2006027860A1/ja active Application Filing
- 2005-01-24 DE DE112005000074T patent/DE112005000074B4/de active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5873694U (ja) * | 1981-11-14 | 1983-05-18 | ソニー株式会社 | 平面振動形スピ−カ |
JPS6440994U (ja) * | 1987-09-07 | 1989-03-10 | ||
JPH01147597U (ja) * | 1988-04-01 | 1989-10-12 | ||
JPH09163490A (ja) * | 1995-12-06 | 1997-06-20 | Masayuki Kimijima | エッジレススピーカー |
JP2001095079A (ja) * | 1999-09-20 | 2001-04-06 | Murata Mfg Co Ltd | スピーカ |
JP2002232984A (ja) * | 2001-01-30 | 2002-08-16 | Sanyo Electric Co Ltd | スピーカ装置 |
Also Published As
Publication number | Publication date |
---|---|
US20080260186A1 (en) | 2008-10-23 |
DE112005000074B4 (de) | 2008-08-28 |
JP3753150B1 (ja) | 2006-03-08 |
DE112005000074T5 (de) | 2006-08-24 |
JP2006109395A (ja) | 2006-04-20 |
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