WO2016093226A1 - スピーカ装置 - Google Patents
スピーカ装置 Download PDFInfo
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- WO2016093226A1 WO2016093226A1 PCT/JP2015/084394 JP2015084394W WO2016093226A1 WO 2016093226 A1 WO2016093226 A1 WO 2016093226A1 JP 2015084394 W JP2015084394 W JP 2015084394W WO 2016093226 A1 WO2016093226 A1 WO 2016093226A1
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- Prior art keywords
- magnet
- speaker unit
- magnetic circuit
- speaker
- diaphragm
- Prior art date
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- 229910052772 Samarium Inorganic materials 0.000 description 2
- 229910000828 alnico Inorganic materials 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
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- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 2
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
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Images
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
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
-
- 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
- H04R7/127—Non-planar diaphragms or cones dome-shaped
-
- 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
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/045—Mounting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—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
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
-
- 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
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
- H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
Definitions
- the present invention relates to a speaker device.
- a small and thin speaker device installed on the ceiling surface of an automobile generally covers the full range with 1 WAY.
- An example of such a speaker device is disclosed in International Publication No. 2005/015950 (Patent Document 1).
- Patent Document 1 the diaphragm is provided with a folded diaphragm to increase the rigidity of the diaphragm and cover up to a high frequency.
- a magnetic circuit that forms a strong magnetic field using a small magnet in order to secure a space for a folded diaphragm.
- a magnet having a strong magnetic force such as a neodymium magnet.
- neodymium magnets are expensive and cause a significant cost increase.
- the speaker device of Patent Document 1 has the following problems in consideration of the thickness in the vertical direction when the sound radiation direction is up and the opposite side is down.
- the length from the upper end, which is the outer periphery and the central portion of the diaphragm, to the lower end, which is the bent portion of the folded portion increases, and there is a limit to configuring the speaker device thin.
- an example of a problem to be solved by the present invention is to provide a speaker device that is thin and low in cost while being a 2WAY type.
- the speaker device includes a first speaker unit including a diaphragm having an opening and an outer magnet type magnetic circuit, and a second speaker unit installed inside the opening.
- the diaphragm is characterized in that a folded portion is formed on the outer peripheral side of the diaphragm that is convex on the side opposite to the sound radiation direction.
- a speaker device includes a first speaker unit including a diaphragm having an opening and an outer magnet type magnetic circuit, a second speaker unit installed inside the opening, It has.
- the diaphragm is formed with a folded portion on the outer peripheral side of the diaphragm that is convex on the side opposite to the sound radiation direction.
- the diaphragm of the first speaker unit is preferably provided with a flat portion formed on the inner peripheral side of the folded portion, and the outer diameter of the flat portion is smaller than the outer diameter of the magnet of the magnetic circuit.
- the flat part preferably has a plane perpendicular to the sound radiation direction of the first speaker unit.
- the magnet is installed on the inner side than the apex of the folded portion.
- the first speaker unit supports the diaphragm and includes a voice coil bobbin around which a voice coil is wound, and the second speaker unit is located inside the voice coil bobbin.
- the magnetic circuit includes a yoke that is magnetically coupled to a magnet, and the second speaker unit is located on the inner side of the inner periphery of the yoke of the first speaker unit.
- the magnetic circuit includes a plate magnetically coupled to the pole of the magnet, and the outer diameter of the plate is smaller than the outer diameter of the flat portion of the diaphragm.
- the outer diameter of the plate is preferably smaller than the outer diameter of the magnet.
- the magnet of the first speaker unit has an annular shape
- the magnet of the second speaker unit has a circular shape
- these magnets are arranged coaxially.
- the diaphragm of the first speaker unit and the diaphragm of the second speaker unit are both circular and coaxial.
- the magnet of the first speaker unit is preferably a ferrite magnet.
- the ratio TW / ⁇ of the length TW from the upper end of the diaphragm of the first speaker unit to the lower end of the magnetic circuit of the first speaker unit and the outer diameter ⁇ of the first speaker unit is: 0.1 ⁇ TW / ⁇ ⁇ 0.2 Are preferred.
- the inner peripheral end of the outer magnetic type magnetic circuit of the first speaker unit is connected to the outer peripheral end of the second speaker unit.
- the cylindrical portion of the yoke included in the outer magnetic type magnetic circuit forms the inner peripheral end
- the frame included in the second speaker unit is the outer peripheral end of the outer magnetic type magnetic circuit. It is preferable that the cylindrical portion is connected to the outer peripheral end portion of the second speaker unit.
- the outer magnetic type magnetic circuit of the first speaker unit includes a plate, a yoke, and an outer magnet disposed between the plate and the yoke, and the inner magnetic type of the second speaker unit.
- the magnetic circuit includes a plate, a yoke, and an inner magnet disposed between the plate and the yoke, and a part of the outer magnet type magnetic circuit and the inner magnet type in the sound radiation direction. It is preferable that a part of the magnetic circuit is at the same height, the magnetic poles of the outer magnet and the inner magnet on the plate side are the same, and the magnetic poles of the outer magnet and the inner magnet on the yoke side are the same. .
- the outer magnetic type magnetic circuit of the first speaker unit includes a plate, a yoke, and an outer magnet disposed between the plate and the yoke, and the inner magnetic type of the second speaker unit.
- the magnetic circuit includes a plate, a yoke, and an inner magnet disposed between the plate and the yoke, and the bottom of the inner magnet type magnetic circuit is the bottom of the outer magnet type magnetic circuit. It is preferable that the terminal portion is disposed in a space that is disposed closer to the sound radiation side and is surrounded by the bottom portion of the inner magnetic type magnetic circuit and the outer magnetic type magnetic circuit.
- FIG. 1 is a longitudinal sectional view of a speaker device according to an embodiment of the present invention and a modification 1.
- FIG. 2 is a plan view of the surface of the speaker device according to the embodiment.
- FIG. 3 is a perspective view of the surface of the speaker device according to the embodiment. It is a back surface top view in the state where a frame of an example speaker device was removed. Note that the concept of “upper and lower” in the following description corresponds to the upper and lower sides in the drawing of FIG.
- the speaker device includes a first speaker unit 10 and a second speaker unit 20 that are arranged coaxially with an axis L as a central axis.
- the first speaker unit 10 functions as a low-frequency to mid-frequency speaker
- the second speaker unit 20 functions as a high-frequency tweeter.
- the sound radiation directions of the first speaker unit 10 and the second speaker unit 20 are the directions of arrows P shown in FIG.
- the speaker device of this embodiment is a thin speaker device attached to the indoor ceiling of an automobile.
- the first speaker unit 10 includes a diaphragm 1, a magnetic circuit 2, a voice coil bobbin 3, and a frame 4.
- the diaphragm 1 has a slightly flat elliptical shape with the axis L as the central axis, and the outer peripheral end thereof is supported by the frame 4 via the edge portion 1a.
- the diaphragm 1 is made of, for example, paper, resin, metal material, or the like.
- the diaphragm 1 is formed with a folded portion 11 that is bent in a V-shaped cross section radially inward of the edge portion 1a.
- a flat flat portion 12 is formed from the inner peripheral side of the folded portion 11 toward the center. Further, a circular opening 13 centering on the axis L is formed in the diaphragm 1 on the radially inner side of the flat portion 12.
- the magnetic circuit 2 of the first speaker unit 10 includes a magnet 21, a plate 22, and a yoke 23.
- the magnet 21 has an annular shape and is a ferrite permanent magnet.
- the magnet 21 may be, for example, a samarium / cobalt or alnico permanent magnet.
- the plate 22 and the yoke 23 are made of a magnetic metal such as iron, and the plate 22 has an annular shape.
- the yoke 23 is formed by integrally forming an annular flange portion (bottom portion) 23a having substantially the same diameter as the plate 22 and a cylindrical tube portion 23b erected from the inner periphery of the flange portion 23a.
- An annular magnet 21 and plate 22 are installed on the outer periphery of the cylindrical portion 23b of the yoke 23 with a predetermined distance from the cylindrical portion 23b, and the flange portion 23a, the magnet 21 and the plate 22 are laminated.
- a magnetic gap 2G is formed between the inner peripheral side end of the plate 22 and the upper end of the cylindrical portion 23b of the yoke 23.
- the voice coil bobbin 3 has a cylindrical shape and is fixed to the inner peripheral edge of the circular opening 13 of the diaphragm 1. Thereby, the voice coil bobbin 3 supports the diaphragm 1.
- a voice coil 31 is wound around the lower outer periphery of the voice coil bobbin 3.
- a lead wire 32 for supplying a voice signal to the voice coil 31 is attached to the folded portion 11.
- the voice coil 31 (and the voice coil bobbin 3) is disposed in the magnetic gap 2G of the magnetic circuit 2.
- the second speaker unit 20 includes a diaphragm 5, a magnetic circuit 6, and a frame 7.
- the diaphragm 5 is made of a metal material and has a rotationally symmetric shape with the axis L as the rotation axis.
- the diaphragm 5 includes a dome-shaped vibrating portion 51, a voice coil bobbin 52, a cone-shaped vibrating portion 53, and an outer peripheral end portion 54.
- the dome-shaped vibrating portion 51, the voice coil bobbin 52, the cone-shaped vibrating portion 53, and The outer peripheral end portion 54 is integrally formed.
- the diaphragm 5 is supported by the frame 7 at the outer peripheral end portion 54.
- the dome-shaped vibrating portion 51 is formed in a convex shape at the center of the diaphragm 5, and the top of the center of the dome-shaped vibrating portion 51 is formed higher than the outer peripheral end portion 54. With this shape, a wide angle directivity can be obtained.
- the dome-shaped vibrating portion 51 is supported by a voice coil bobbin 52, a cone-shaped vibrating portion 53, and an outer peripheral end portion 54 so as to vibrate along the axis L direction (driving direction) at a predetermined position on the magnetic circuit 6. .
- the magnetic circuit 6 of the second speaker unit 20 includes a magnet 61, a plate 62, and a yoke 63.
- the magnet 61 has a disk shape and is, for example, a ferrite permanent magnet.
- the magnet 61 may be, for example, a samarium / cobalt, alnico, or neodymium permanent magnet.
- the plate 62 and the yoke 63 are made of a magnetic metal such as iron, and the plate 62 has a disk shape slightly larger in diameter than the magnet 61.
- the yoke 63 is formed by integrally forming a disk-shaped disk part (bottom part) 63a having a diameter larger than that of the magnet 61 and a curved part 63b curved from the disk part 63a to the plate 62 side. And the magnet 61 is pinched
- the voice coil bobbin 52 of the diaphragm 5 has a cylindrical shape, and a voice coil 52 a is wound around the outer periphery of the voice coil bobbin 52.
- the voice coil 52 a (and the voice coil bobbin 52) is disposed in the magnetic gap 6 G of the magnetic circuit 6.
- the voice coil 52a and the voice coil bobbin 52 vibrate along the direction of the axis L, causing the diaphragm 5 to vibrate.
- the sound radiation direction P of the second speaker unit 20 is an upward direction parallel to the axis L.
- the voice coil 52a may be fixed to the voice coil bobbin 52 of the diaphragm with an adhesive or the like.
- A is the upper end of the diaphragm 1
- B is the upper end of the diaphragm 5
- C is the lower end of the diaphragm 1
- D is the lower end of the diaphragm 5
- E is the magnet 21. It is the upper end.
- Each upper end and lower end appear as lines in FIGS. 2 to 4, but the upper end A, the upper end B, the lower end C, and the lower end D are arbitrary points on this line.
- the speaker device includes a first speaker unit 10 including a diaphragm 1 having an opening 13 and an outer magnetic type magnetic circuit 2, and a second speaker unit 20 installed radially inside the opening 13. And. Then, on the diaphragm 1 of the first speaker unit 10, a folded portion 11 is formed on the outer peripheral side of the diaphragm 1 so as to be convex on the side opposite to the sound radiation direction P. Since the folded portion 11 has a convex shape (V-shaped cross section) on the opposite side to the sound radiation direction P, the sectional moment on the plane including the axis L is increased, and rigidity can be secured.
- the outer diameter of the flat portion 12 of the diaphragm 1 is smaller than the outer diameter of the magnet 21 of the magnetic circuit 2.
- the flat portion 12 has a plane perpendicular to the sound emission direction P of the first speaker unit 10. Therefore, the thickness of the diaphragm 1 in the sound radiation direction can be reduced, and the thickness of the first speaker unit 10 itself can be reduced.
- the folded portion 11 outside the flat portion 12 is convex further outward than the outer diameter of the magnet 21 and on the opposite side to the sound radiation direction P, the internal space below the flat portion 12 is widened. It is possible to adopt an external magnetic type for the magnetic circuit 2, and it is possible to employ a ferrite magnet having a relatively large volume as the magnet 21. Therefore, the cost can be reduced while obtaining a sufficient driving force.
- the second speaker unit 2 is located on the radially inner side of the voice coil bobbin 3 of the first speaker unit 10. Therefore, the thickness of the speaker device can be reduced.
- the first speaker unit 10 includes a plate 22 magnetically coupled to the pole of the magnet 21, and the outer diameter of the plate 22 is smaller than the outer diameter of the flat portion 12 of the diaphragm 1. Yes. Further, the outer diameter of the plate 22 is smaller than the outer diameter of the magnet 21. Therefore, the thickness of the diaphragm 1 in the sound radiation direction can be reduced, and the thickness of the first speaker unit 10 itself can be reduced.
- the magnet 21 of the magnetic circuit 2 of the first speaker unit 10 has an annular shape
- the magnet 61 of the magnetic circuit 6 of the second speaker unit 20 has a circular shape. And these magnets 21 and 61 are arrange
- the speaker device of the embodiment includes a first speaker unit 10 having a first diaphragm 1 supported by a voice coil bobbin 3 and a second diaphragm 5 installed on the radially inner side of the voice coil bobbin 3. And a first speaker unit 10 and a second speaker unit 20 having a sound emission direction P substantially coincident with each other.
- the upper end A of the first diaphragm 1 is positioned at the upper end B of the second diaphragm 5 as shown in FIG. It is almost equal to the position. Therefore, the phases of the sound wave emitted from the first diaphragm 1 and the wave of the sound wave emitted from the second diaphragm 5 are aligned, and good acoustic characteristics can be obtained.
- the position of the lower end C of the first diaphragm 1 of the first speaker unit 10 is substantially equal to the position of the lower end D of the second diaphragm 5 of the second speaker unit 20. It has become. Further, the length from the upper end A to the lower end C of the first diaphragm 1 is substantially equal to the length from the upper end B to the lower end D of the second diaphragm 5. Therefore, the thickness of the speaker device can be reduced.
- the second speaker unit 20 includes a magnetic circuit 6 including a magnet 61, and the magnet 61 is installed between the upper end and the lower end of the voice coil bobbin 3 of the first speaker unit 10. Therefore, the thickness of the speaker device can be reduced.
- the first diaphragm 1 of the first speaker unit 10 includes a flat portion 12 having a plane perpendicular to the sound radiation direction P on the inner peripheral side, and the flat portion 12 is the second speaker unit 20. 2 is substantially equal to the position of the upper end B of the diaphragm 5.
- first diaphragm 1 is provided with a folded portion 11 which is convex on the outer circumferential side of the first diaphragm 1 on the side opposite to the sound radiation direction P.
- the lower end C of the folded portion 11 is positioned at the second diaphragm 5. Is substantially equal to the position of the lower end D.
- the first speaker unit 10 includes a magnetic circuit 2 including a magnet 21, and the lower end C of the folded portion 11 of the first diaphragm 1 is above the upper end E of the magnet 21 of the first speaker unit 10. It is supposed to be located.
- the second diaphragm 5 includes a folded portion 5 a formed by a voice coil bobbin 52 and a cone-shaped vibrating portion 53 so as to protrude on the opposite side to the sound radiation direction P.
- the positions of the lower ends C and D of the folded portion 11 of the first diaphragm 1 and the folded portion 5a of the second diaphragm 5 are substantially equal.
- the position of the upper end A of the first diaphragm 1 is higher than the position of the upper end B of the second diaphragm 5.
- the position of the upper end A of the first diaphragm 1 is the upper end of the second diaphragm 5. It is below the position of B.
- the vertical thickness of the magnet 21 of the magnetic circuit 2 of the first speaker unit 10 is larger than the length from the upper end A to the lower end C of the first diaphragm 1. . That is, the magnet 21 having a large volume is used for the thin diaphragm 1.
- the shape of the diaphragm may be a circle (perfect circle) as in Modification 1 of FIG.
- symbol is attached to the same element as the said Example.
- a duplicate description is omitted.
- the speaker unit 30 in Modification 1 shown in FIG. 5 has a circular diaphragm 1x.
- the diaphragm 1x is made of, for example, paper, resin, metal material, or the like.
- the diaphragm 1x is formed with a folded portion 11x that is bent in a V-shaped cross section inside the edge portion 1xa in the radial direction.
- a flat flat portion 12x is formed from the inner peripheral side of the folded portion 11x toward the center.
- the opening 13 similar to that of the embodiment is formed inside the flat portion 12x in the radial direction.
- returning part 11x, its lower end C, and the flat part 12x are all the shapes of a perfect circle.
- the magnetic circuit 2 and the voice coil bobbin 3 are the same as in the embodiment.
- returning part 11x has a larger diameter than the magnet 21 of the magnetic circuit 2.
- the magnet 21 of the magnetic circuit 2 of the first speaker unit 30 is disposed radially inward from the lower end C of the folded portion 11x of the diaphragm 1x, the interference between the magnet 21 and the folded portion 11x. Therefore, the thickness of the speaker device can be reduced.
- the diaphragm 1x of the first speaker unit 30 and the diaphragm 5 of the second speaker unit 20 are both circular and coaxial.
- the frame 7 of the second speaker unit 20 is engaged with the end of the cylindrical portion 23b of the yoke 23 of the magnetic circuit 2 of the first speaker unit 10.
- the relationship between the speaker unit 2 and the yoke 23 of the magnetic circuit 2 may be as shown in Modification 2 of FIG.
- the second speaker unit 40 includes the same magnetic circuit 6 as in the above embodiment, and the diaphragm 5 y having a diameter smaller than that of the diaphragm 5 and the diameter of the frame 7. And a small frame 7y.
- the diaphragm 5y includes a dome-shaped vibrating portion 51, a voice coil bobbin 52, and a cone-shaped vibrating portion 53, and an outer peripheral end portion 54y having a smaller diameter than the outer peripheral end portion 54 of the embodiment.
- the diaphragm 5y is supported on the frame 7y by the outer peripheral end 54y. Therefore, the second speaker unit 40 according to the second modification has a smaller outer diameter than the second speaker unit 20 according to the above-described embodiment.
- the second speaker unit 40 has a yoke 23 of the first speaker unit 10. Is fitted in the cylindrical portion 23a.
- the magnetic circuit 2 in the first speaker unit 10 includes the yoke 23 that is magnetically coupled to the magnet 21, and the second speaker unit 40 is connected to the first speaker unit 10. It is located radially inward from the inner periphery of the yoke 23.
- the speaker devices of the embodiment and the first and second modifications are configured so that the magnetic circuit 2 of the first speaker unit 10 extends from the upper end A of the diaphragm 1 of the first speaker unit 10 as shown in FIGS.
- the length TW to the lower end (lower end of the yoke 23) is about 10 mm.
- the outer diameter ⁇ of the first speaker unit 10 is about 80 mm.
- the ratio TW / ⁇ between the length TW and the outer diameter ⁇ is 0.1 ⁇ TW / ⁇ ⁇ 0.2 It has become.
- the diaphragms 1 and 1x and the diaphragms 5 and 5y are formed of, for example, paper, resin, or a metal material.
- the metal material for example, aluminum
- titanium, duralumin, beryllium, magnesium alloy, or the like can be used.
- the inner peripheral end of the outer magnet type magnetic circuit 2 of the first speaker unit 10 is connected to the outer peripheral end of the second speaker unit 20. That is, the cylindrical portion 23 b of the yoke 23 included in the outer magnet type magnetic circuit 2 of the first speaker unit 10 forms the inner peripheral end of the outer magnet type magnetic circuit 2, and the second speaker unit 20.
- the outer peripheral end 7 a of the frame 7 included in the frame forms the outer peripheral end of the second speaker unit 20.
- the cylinder portion 23 b is connected to the outer peripheral end portion 7 a of the frame 7 of the second speaker unit 20.
- the outer magnet type magnetic circuit 2 of the first speaker unit 10 is disposed between the plate 22, the yoke 23, and the plate 22 and the yoke 23.
- Magnet 21 outside magnet
- the magnetic circuit 6 of the second speaker unit 20 (40) includes a plate 62, a yoke 63, and a magnet 61 (inner magnet) disposed between the plate 62 and the yoke 63.
- the magnetic circuit 6 constitutes an internal magnet type magnetic circuit. In the sound radiation direction P, a part of the outer magnet type magnetic circuit 2 and a part of the inner magnet type magnetic circuit 6 are at the same height.
- the plate 22 of the outer magnetic type magnetic circuit 2 and a part of the cylindrical portion 23b of the yoke 23 are at the same height with respect to a part of the magnet 61 of the inner magnetic type magnetic circuit 6 and a part of the yoke 63. is there.
- FIG. 7 is a diagram showing an example of the direction of the magnetic poles of the magnet 61 and the magnet 21 and the flow of the magnetic flux, and only the main symbols are attached in the figure.
- FIG. 7 shows the case of the embodiment and the first modification, but the same applies to the second modification.
- the magnetic poles of the magnet 61 (outer magnet) and the magnet 21 (inner magnet) on the plates 62 and 22 side are the same, and the magnet 61 (outer magnet) and magnet 21 on the yokes 63 and 23 side are the same.
- the magnetic poles of the (inner magnet) are the same. That is, the direction of the magnetic pole of the magnet 61 indicated by the arrow M1 in FIG. 7 is the same as the direction of the magnetic pole of the magnet 21 indicated by the arrow M2.
- the arrow N1 indicates an example of the flow of magnetic flux by the magnet 61
- the arrow N2 indicates an example of the flow of magnetic flux by the magnet 21.
- the outer magnetic type magnetic circuit 2 and the inner magnetic type magnetic circuit 6 can be arranged close to each other. Further, the efficiency of the magnetic circuits 2 and 6 can be increased.
- the bottom of the inner magnet type magnetic circuit 6 of the second speaker unit 20 (40) (the bottom 63 a of the yoke 63) is the outer magnet type of the first speaker unit 10.
- the sound radiation side sound radiation direction P side
- the bottom of the inner magnet type magnetic circuit 6 and the outer magnet type magnetic circuit 2 are arranged on the sound radiation side (sound radiation direction P side) from the bottom of the magnetic circuit 2 (bottom 23a of the yoke 23), and the bottom of the inner magnet type magnetic circuit 6 and the outer magnet type magnetic circuit 2 are A terminal portion T is disposed in the enclosed space S. Thereby, the space which arrange
- the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention.
- the embodiments shown in the above drawings can be combined with each other as long as there is no particular contradiction or problem in the purpose and configuration.
- the description content of each figure can become independent embodiment, respectively, and embodiment of this invention is not limited to one embodiment which combined each figure.
- the first speaker unit 10 and the second speaker unit may be coaxial or may have different axes.
- the diaphragm and the magnetic circuit are not limited to a circle and an ellipse, but may be a polygon, for example.
Abstract
Description
0.1≦TW/φ≦0.2
であるものが好ましい。
このように、長さTWと外径φとの比TW/φが、
0.1≦TW/φ≦0.2
となっている。
1 振動板(第1の振動板)
11 折り返し部
12 平坦部
13 開口
2 磁気回路
21 磁石
22 プレート
23 ヨーク
23a フランジ部(底部)
23b 筒部
2G 磁気ギャップ
3 ボイスコイルボビン
31 ボイスコイル
4 フレーム
20 第2のスピーカユニット
5 振動板(第2の振動板)
51 ドーム状振動部
52 ボイスコイルボビン
53 コーン状振動部
54 外周端部
6 磁気回路
6G 磁気ギャップ
61 磁石
62 プレート
63 ヨーク
63a 円盤部(底部)
63b 湾曲部
7 フレーム
30 第1のスピーカユニット
1x 振動板
11x 折り返し部
12x 平坦部
40 第2のスピーカユニット
5y 振動板(第2の振動板)
7y フレーム
P 音放射方向
A 第1の振動板の上端
B 第2の振動板の上端
C 第1の振動板の下端
D 第2の振動板の下端
E 磁石の上端
L 軸線
Claims (16)
- 開口を有する振動板と外磁型の磁気回路とを具備する第1のスピーカユニットと、
前記開口の内側に設置された第2のスピーカユニットと、
を備え、
前記振動板には、当該振動板の外周側に、音放射方向とは反対側に凸となる折り返し部が形成されていることを特徴とするスピーカ装置。 - 前記振動板は、前記折り返し部の内周側に形成された平坦部を備え、
前記平坦部の外径が前記磁気回路の磁石の外径よりも小さいことを特徴とする請求項1に記載のスピーカ装置。 - 前記平坦部は、前記第1のスピーカユニットの音放射方向と垂直な平面を有することを特徴とする請求項1または2に記載のスピーカ装置。
- 前記磁石は、前記折り返し部の頂点よりも内側に設置されていることを特徴とする請求項1乃至3のいずれか一項に記載のスピーカ装置。
- 前記第1のスピーカユニットが、前記振動板を支持するとともにボイスコイルが巻かれたボイスコイルボビンを備え、
前記第2のスピーカユニットが、前記ボイスコイルボビンよりも内側に位置していることを特徴とする請求項1乃至4のいずれか一項に記載のスピーカ装置。 - 前記磁気回路が、前記磁石と磁気的に結合したヨークを備え、
前記第2のスピーカユニットが、前記ヨークの内周よりも内側に位置していることを特徴とする請求項1乃至5のいずれか一項に記載のスピーカ装置。 - 前記磁気回路が、前記磁石の極と磁気的に結合したプレートを備え、
前記プレートの外径が、前記平坦部の外径よりも小さいことを特徴とする請求項1乃至6のいずれか一項に記載のスピーカ装置。 - 前記プレートの外径は、前記磁石の外径よりも小さいことを特徴とする請求項7に記載のスピーカ装置。
- 前記第1のスピーカユニットの前記磁石は円環状の形状であり、前記第2のスピーカユニットの磁石は円形であり、これらの磁石が同軸に配置されていることを特徴とする請求項1乃至8のいずれか一項に記載のスピーカ装置。
- 前記第1のスピーカユニットの前記振動板と、前記第2のスピーカユニットの振動板とが、ともに円形で同軸であることを特徴とする請求項1乃至9のいずれか一項に記載のスピーカ装置。
- 前記第1のスピーカユニットの前記磁石はフェライト磁石であることを特徴とする請求項1乃至10のいずれか一項に記載のスピーカ装置。
- 前記第1のスピーカユニットの前記振動板の上端から前記第1のスピーカユニットの前記磁気回路の下端までの長さTWと、前記第1のスピーカユニットの外径φとの比TW/φが、
0.1≦TW/φ≦0.2
であることを特徴とする請求項1乃至11のいずれか一項に記載のスピーカ装置。 - 前記第1のスピーカユニットの外磁型の磁気回路の内周端部は、前記第2のスピーカユニットの外周端部に連結していることを特徴とする請求項1に記載のスピーカ装置。
- 前記外磁型の磁気回路が有するヨークの筒部は、前記内周端部を形成しており、
前記第2のスピーカユニットが有するフレームは、前記外磁型の磁気回路の外周端部を形成しており、
前記筒部は、当該第2のスピーカユニットの外周端部に連結していることを特徴とする請求項13に記載のスピーカ装置。 - 前記第1のスピーカユニットの外磁型の磁気回路は、プレートと、ヨークと、当該プレートとヨークの間に配置される外側磁石と、を備え、
前記第2のスピーカユニットの内磁型の磁気回路は、プレートと、ヨークと、当該プレートとヨークの間に配置される内側磁石と、を備え、
音放射方向における、前記外磁型の磁気回路の一部と前記内磁型の磁気回路の一部は同じ高さにあり、
前記プレート側における前記外側磁石及び前記内側磁石の磁極は同じであり、
前記ヨーク側における前記外磁石及び内側磁石の磁極は同じであることを特徴とする請求項1に記載のスピーカ装置。 - 前記第1のスピーカユニットの外磁型の磁気回路は、プレートと、ヨークと、当該プレートとヨークの間に配置される外側磁石と、を備え、
前記第2のスピーカユニットの内磁型の磁気回路は、プレートと、ヨークと、当該プレートとヨークの間に配置される内側磁石と、を備え、
前記内磁型の磁気回路の底部は、前記外磁型の磁気回路の底部より音放射側に配置されており、
前記内磁型の磁気回路の底部と前記外磁型の磁気回路で囲まれる空間内には、端子部が配置されることを特徴とする請求項1に記載のスピーカ装置。
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US15/534,288 US10277976B2 (en) | 2014-12-08 | 2015-12-08 | Speaker device having diaphragm with folded portion |
JP2016563683A JP6353078B2 (ja) | 2014-12-08 | 2015-12-08 | スピーカ装置 |
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Cited By (1)
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CN107454525A (zh) * | 2017-09-08 | 2017-12-08 | 广东欧珀移动通信有限公司 | 电声组件、电声装置及移动终端 |
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2015
- 2015-12-08 WO PCT/JP2015/084394 patent/WO2016093226A1/ja active Application Filing
- 2015-12-08 JP JP2016563683A patent/JP6353078B2/ja active Active
- 2015-12-08 US US15/534,288 patent/US10277976B2/en not_active Expired - Fee Related
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US10277976B2 (en) | 2019-04-30 |
JP2018157588A (ja) | 2018-10-04 |
JP6353078B2 (ja) | 2018-07-04 |
US20170347184A1 (en) | 2017-11-30 |
JPWO2016093226A1 (ja) | 2017-09-28 |
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