WO2013190811A1 - Dispositif de haut-parleur et dispositif équipé d'un haut-parleur - Google Patents

Dispositif de haut-parleur et dispositif équipé d'un haut-parleur Download PDF

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Publication number
WO2013190811A1
WO2013190811A1 PCT/JP2013/003732 JP2013003732W WO2013190811A1 WO 2013190811 A1 WO2013190811 A1 WO 2013190811A1 JP 2013003732 W JP2013003732 W JP 2013003732W WO 2013190811 A1 WO2013190811 A1 WO 2013190811A1
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WO
WIPO (PCT)
Prior art keywords
speaker device
magnets
voice coil
speaker
yoke
Prior art date
Application number
PCT/JP2013/003732
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English (en)
Japanese (ja)
Inventor
松村　俊之
佐伯　周二
佐和子 狩野
明子 藤瀬
敦 坂口
Original Assignee
パナソニック株式会社
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2013190811A1 publication Critical patent/WO2013190811A1/fr

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    • 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
    • H04R9/027—Air gaps using a magnetic fluid
    • 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

Definitions

  • the present invention relates to a speaker device, a speaker-mounted device such as an audiovisual apparatus or a portable information processing device including the speaker device, and more specifically, a small speaker device capable of wide-band reproduction, and the speaker device.
  • the present invention relates to an audiovisual apparatus, a portable information processing apparatus including the speaker device, a moving unit, and an inner phone.
  • FIG. 11 is a diagram showing a conventional speaker described in Patent Document 1.
  • Each cross-sectional view end view by AOB line, end view by MN line
  • the speaker shown in FIG. 11 has a voice coil 116 disposed in a magnetic circuit composed of a magnet 111, a plate 112, and a yoke 110, and drives a diaphragm 113.
  • the magnetic fluid 117 is disposed between the outer peripheral portion of the plate 112 and the inner peripheral portion of the voice coil 116, and by separating the space on the front surface of the diaphragm 113 from the space on the rear surface, sound generated from the front surface and
  • the structure is such that the generated sound is prevented from canceling, the rolling vibration of the diaphragm 113 is prevented, and the Joule heat generated by the voice coil 116 is released to the magnetic circuit.
  • the support that works on the diaphragm 113 compared to the case where the entire outer periphery of the diaphragm 113 is configured with edges.
  • the system compliance has been increased, and low frequency reproduction is possible even with a small aperture.
  • the sound generated from the rear surface of the diaphragm 113 of the speaker configured as in Patent Document 1 is released toward the lower surface of the speaker through a hole U opened in the plate 112, the magnet 111, and the yoke 110.
  • the presence of the hole U can be expected to prevent the movement of the diaphragm from being braked by the compliance of air confined on the back surface of the diaphragm 113. Therefore, it may be preferable that the hole U is provided in the magnet, the plate, and the yoke.
  • FIG. 11 shows an example in which an annular magnet is used, but an ellipse or a track shape (a shape composed of two parallel line segments and two curves connecting opposite ends of the line segments). In this case, it is more difficult to manufacture a magnet with a hole. Also, there is a method of making a hole in a magnet without a hole, but when making a hole in a small magnet, the magnet is easily broken when making the hole, and it is difficult to manufacture stably. In addition, the manufacturing cost increases.
  • the present disclosure provides a speaker device that is easy to mount and can be reproduced in a small size and a wide band.
  • a speaker device of the present disclosure includes a magnetic circuit having a magnetic gap, a voice coil at least partially disposed in the magnetic gap, and a diaphragm to which the voice coil is fixed. And a plurality of supports that support the diaphragm, and a magnetic fluid disposed on at least one of the inner and outer peripheral portions of the voice coil, and the magnetic circuit includes at least a plurality of magnets and a yoke And the plate, and the magnetic circuit has a through-hole penetrating in the vibration direction of the diaphragm inside the voice coil.
  • the size and slim shape of the speaker can be determined without being limited to the manufacturing process, such as cracking during firing, and it is easier to mount. It is possible to provide a speaker device that is small and capable of reproducing in a wide band.
  • FIG. 1A is a top view and a cross-sectional view of a structure of a first speaker device according to the present disclosure.
  • FIG. 1B is a top view and a cross-sectional view of a first speaker device according to another configuration.
  • FIG. 1C is a top view and a cross-sectional view of a first speaker device according to still another configuration.
  • FIG. 2 is a structural cross-sectional view of a first speaker device according to still another configuration.
  • FIG. 3 is a top view and a structural cross-sectional view of a second speaker device according to the present disclosure.
  • FIG. 4A is a structural cross-sectional view of a third speaker device according to the present disclosure.
  • FIG. 4B is a structural cross-sectional view of a third speaker device according to another configuration.
  • FIG. 5 is a structural cross-sectional view of a fourth speaker device according to the present disclosure.
  • FIG. 6A is a structural cross-sectional view of a fifth speaker device according to the present disclosure.
  • FIG. 6B is a structural cross-sectional view of a fifth speaker device according to another configuration.
  • FIG. 6C is a structural cross-sectional view of a fifth speaker device according to still another configuration.
  • FIG. 7 is a mobile information terminal device according to the present disclosure.
  • FIG. 8 is an image display device according to the present disclosure.
  • FIG. 9 is a mounting diagram of the in-vehicle speaker according to the present disclosure.
  • FIG. 10 is a structural cross-sectional view of the inner phone according to the present disclosure.
  • FIG. 11 is a top view and a cross-sectional view of a conventional speaker.
  • each cross-sectional view (an end view taken along line AB and an end view taken along line MN) means an arrow view, and members not on the end face are appropriately indicated by virtual lines.
  • the present disclosure relates to a magnetic circuit having a magnetic gap, a voice coil at least partially disposed in the magnetic gap, a diaphragm to which the voice coil is fixed, and a plurality of supports that support the diaphragm. And a magnetic fluid disposed on at least one of an inner peripheral portion and an outer peripheral portion of the voice coil, and the magnetic circuit includes at least a plurality of magnets, a yoke, and a plate, and the magnetic circuit
  • the circuit includes a speaker device having a through-hole penetrating in the vibration direction of the diaphragm inside the voice coil.
  • a magnetic circuit is configured by combining a plurality of magnets, it is possible to determine the size and slim shape of the device without being bound to the manufacturing process, such as cracking during firing, and it is easier to mount. It is possible to provide a speaker device that can be reproduced in a small size and a wide band.
  • the magnetic fluid may be disposed only on the yoke side of the voice coil.
  • the magnetic fluid is formed in the gap between the magnets, which is generated when it is assumed that the magnetic fluid is disposed on the plate side inside the voice coil. Can be prevented from being sucked by capillary action.
  • the magnetic fluid is disposed at least on the plate side of the voice coil, and the magnetic circuit fills at least a yoke, a plate, the plurality of magnets, and a boundary region between the plurality of magnets. It may be configured to include a filling member. According to this configuration, the gap between the magnets can be eliminated by the filling member to prevent the spaces before and after the diaphragm from being connected, and the magnetic fluid can be prevented from entering the gap between the magnets due to capillary action. . For this reason, the speaker device can operate with stable performance.
  • the magnetic fluid is disposed at least on the plate side of the voice coil
  • the magnetic circuit is at least a yoke, a plate, and the plurality of magnets disposed outside the through hole
  • a first cover member that covers at least a boundary region between the plurality of magnets from the inside of the plurality of magnets may be included. According to this configuration, since the gap between the magnets and the through hole can be separated by the first cover member, the space before and after the diaphragm is connected, and sound cancellation before and after the diaphragm occurs. Can be prevented.
  • the first cover member may have a protruding portion that protrudes on the surface of the magnetic circuit component member that surrounds one or both through ends of the through hole.
  • the 1st cover member since the 1st cover member has an overhang
  • the magnetic fluid is disposed at least on the plate side of the voice coil
  • the magnetic circuit is at least a yoke, a plate, and the plurality of magnets disposed outside the through hole
  • a second cover member that covers a boundary region between the plurality of magnets from the outside of the plurality of magnets may be included. According to this configuration, the second cover member separates the outside of the plurality of magnets from the gaps and through holes between the magnets. Therefore, it is possible to prevent the spaces before and after the diaphragm from being connected and canceling the sound before and after the diaphragm.
  • the magnetic fluid is disposed on both the yoke side and the plate side of the voice coil, and communicates the space surrounded by the magnetic fluid, the voice coil, the yoke, and the plate with the outside of the apparatus. Vent holes may be provided. According to this configuration, it is possible to prevent the space surrounded by the magnetic fluid, the voice coil, the magnet, and the yoke from being sealed.
  • the shape of the voice coil viewed in the coil axis direction is a circle, a track shape, a rectangle, a rectangle with rounded corners, an ellipse, and a shape in which a plurality of linear portions are connected by a continuous curved portion, It may have any one shape. According to this configuration, speakers having various shapes can be realized.
  • the shape of the through hole seen in the vibration direction of the diaphragm may be a round shape or a long hole shape. According to this configuration, the distribution of magnetic flux supplied from the magnetic circuit can be adjusted by utilizing the shape of the through hole in accordance with the shape of the voice coil.
  • FIG. 1A is a top view and a structural cross-sectional view of a first speaker device according to the present disclosure.
  • 1 is a plate
  • 2a and 2b are magnets (hereinafter, the magnets may be described without being distinguished from each other for convenience, and in this case, the symbol “2” is used for convenience)
  • 3 is a yoke
  • 4 is a diaphragm 5 is a plurality of edges
  • 6 is a voice coil
  • 7 is a magnetic fluid
  • 8 is a frame.
  • a magnetic circuit is formed by the plate 1, the magnets 2a and 2b, and the yoke 3, and a magnetic gap is formed between the plate 1 and the yoke 3, and the voice coil 6 is disposed in the magnetic gap.
  • an internal magnet type magnetic circuit in which the magnets 2a and 2b are located inside the voice coil 6 is shown.
  • the magnets 2a and 2b and the yoke 3 are coupled by being fixed to each other by bonding or the like, and the magnets 2a and 2b and the plate 1 are coupled to each other by being fixed to each other by bonding or the like.
  • the voice coil 6 is fixed to the diaphragm 4, and the diaphragm 4 is supported by a plurality of edges 5 at the outer periphery, and the edge 5 is fixed to the frame 8. Further, the frame 8 is fixed to the outer surface of the yoke 3 to hold the magnetic circuit.
  • the magnetic circuit has a through-hole T penetrating in the vibration direction of the diaphragm 4 inside the voice coil 6.
  • the magnets 2a and 2b are arranged side by side so that each of them forms a semi-annular shape as viewed in the vibration direction and are combined in an annular shape, thereby forming a direct-current magnetic flux generation source as a whole, Surrounds T.
  • the through hole T passes through the plate 1 and the yoke 3.
  • any shape is possible as the shape of the through-hole T as viewed in the vibration direction of the diaphragm 4, the shape is round here, particularly circular.
  • the round shape includes an ellipse, a shape surrounded by a closed curve having no symmetry in the spread, a rounded polygon, and the like.
  • the edge 5 is a divided edge divided into a plurality of parts, and therefore does not have a role of separating the space before and after the diaphragm 4.
  • the magnetic fluid 7 is filled outside the voice coil 6, the space on the back side of the diaphragm and the space on the front side of the diaphragm are separated.
  • the edge 5 is a divided edge, the stiffness of the support can be reduced, and even if the speaker is downsized, it can be operated with a large amplitude.
  • FIG. 1A shows a gap g that is a boundary region between the magnets 2a and 2b.
  • the magnetic fluid 7 is disposed only on the outer peripheral side of the voice coil 6, that is, only on the yoke 3 side of the yoke 3 side and the plate 1 side of the voice coil. The magnetic fluid 7 is not arranged on the plate 1 side.
  • the magnet is divided into two, but the number of divisions may be arbitrary. In the case of two divisions, if the magnets 2a and 2b have the same shape, they can be handled as the same member, which is advantageous in terms of manufacturing cost, material procurement, etc. 2a and 2b may have different shapes. Although an example in which the magnet is divided into two parts is given here, the number of divisions may be any number of two or more.
  • FIG. 1B is a top view and a cross-sectional view of a first speaker device according to another configuration.
  • the speaker device of FIG. 1B includes constituent members that can be referred to by the names of the constituent members corresponding to reference numerals 1 to 8 described with reference to FIG. 1A.
  • the magnetic fluid 7 is disposed on the outer peripheral side of the voice coil 6, that is, on the yoke 3 side of the voice coil 6, and on the inner peripheral side of the voice coil 6, that is, on the plate 1 side.
  • a magnetic fluid 7b is provided.
  • the magnetic fluid 7a and the magnetic fluid 7b may be of the same type or different types.
  • the voice coil 6, the magnet 2a, and the yoke 3 are sealed, for example, at the bottom of the yoke 3, the air hole 3a that communicates the space V with the outside of the speaker device. Any number may be provided.
  • FIG. 1C is a top view and a cross-sectional view of a first speaker device according to still another configuration.
  • the speaker device of FIG. 1C includes constituent members that can be referred to by the names of the constituent members corresponding to reference numerals 1 to 8 described with reference to FIG.
  • the edge 5 in FIG. 1C is provided along the entire circumference of the speaker device unlike the divided edge like the edge 5 in FIG. 1A and separates the space before and after the diaphragm 4. In this way, a magnetic circuit configured using a plurality of magnets may be combined with edges provided along the entire circumference of the speaker device.
  • the magnetic fluid 7 can be prevented from being sucked into the gap between the magnets by a capillary phenomenon by disposing the magnetic fluid 7 only on the outer peripheral side of the voice coil 6, that is, only on the yoke 3 side. It should be noted that the edge provided along the entire circumference of the speaker device can be applied to a speaker device having a configuration described elsewhere.
  • FIGS. 1A to 1C is an internal magnetic circuit, but FIG. 2 shows a cross-sectional view of the structure of the speaker device which is an external magnetic circuit.
  • the speaker device of FIG. 2 includes constituent members that can be referred to by the names of the constituent members corresponding to reference numerals 1 to 8 described with reference to FIG. 1A.
  • the magnets 2 a and 2 b are located outside the voice coil 6.
  • the frame 8 is fixed to the upper surface of the plate 1.
  • the magnetic fluid 7 is located inside the voice coil 6, but since it is arranged on the yoke side of the voice coil 6 as in the case of the internal magnet type magnetic circuit, a plurality of magnets are provided. There is no contact between the gaps. For this reason, the magnetic fluid 7 is not sucked into the gaps between the plurality of magnets, and a stable operation can be realized.
  • the magnet is divided into two parts, but the number of divisions may be any number of two or more. In the case of two divisions, if the magnets 2a and 2b have the same shape, they can be handled as the same member, which is advantageous in terms of manufacturing cost, material procurement, etc. 2a and 2b may have different shapes.
  • FIG. 3 is a top view and a structural cross-sectional view of a second speaker device according to the present disclosure.
  • the speaker device of FIG. 3 includes constituent members that can be referred to by the names of the constituent members corresponding to reference numerals 1 to 8 described for the first speaker device, but the points that are particularly different from the first speaker device will be described.
  • the speaker device of FIG. 3 includes a sealing unit 9 disposed between the plurality of magnets 2a and 2b.
  • the sealing means 9 is composed of a filling member that fills a gap g between the magnets 2a and 2b. Specifically, an adhesive or a resin may be used as the material for the sealing means 9.
  • the position of the magnetic fluid 7 in the second speaker device is different from that of the first speaker device, and the magnetic fluid 7 is provided inside the voice coil 6, that is, on the plate 1 side.
  • the operation of the speaker and the effect of sealing the space around the diaphragm 4 of the magnetic fluid 7 are omitted because the principle of the magnetic fluid is the same as that of the first speaker device, although the position of the magnetic fluid is different.
  • the sealing means 9 fills the gap g between the magnets 2a and 2b, eliminates the gap between the magnets, prevents the space before and after the diaphragm 4 from being connected, and the magnetic fluid 7 causes the gap between the magnets by capillary action. Intrusion can be prevented. For this reason, the speaker device can operate with stable performance.
  • the magnetic fluid 7 may be further arranged outside the voice coil 6, that is, on the yoke 3 side.
  • FIG. 4A is a structural cross-sectional view of a third speaker device according to the present disclosure.
  • the speaker device of FIG. 4A includes constituent members that can be referred to by the names of the constituent members corresponding to reference numerals 1 to 8 described for the first speaker device, and points that are particularly different from the first speaker device will be described.
  • illustration is abbreviate
  • the third speaker device is different from the first speaker device in the position of the magnetic fluid 7, and the magnetic fluid 7 is provided inside the voice coil 6, that is, on the plate 1 side.
  • the third speaker device includes a sealing unit 91.
  • the sealing means 91 is made of a cylindrical nonmagnetic material, and is disposed inside the magnets 2a and 2b to form a cover member that covers the inner peripheral side of the DC magnetic flux generation source.
  • the cover member only needs to cover at least the boundary region between the magnets 2a and 2b from the inside of the magnets 2a and 2b, and is not necessarily cylindrical, and may be provided for each boundary region.
  • the sealing means 91 may not be completely airtight in preventing the communication between the spaces, and any nonmagnetic material such as resin, ceramic, metal, inorganic film can be applied to the cover member.
  • the magnetic fluid 7 may also be provided outside the voice coil 6, that is, on the yoke 3 side.
  • the sealing means 91 is arranged only inside the magnets 2a and 2b. However, as shown in FIG. 3, the sealing means 91 may be used in combination with a type in which the sealing means 9 is filled in the gap between the magnets 2a and 2b. good. In this case, in addition to the effect when only the sealing means 91 is used as the sealing means, the movement of the magnetic fluid 7 to the gap due to the capillary phenomenon can be prevented. Further, since the sealing means 91 passes through the inside of the magnets 2a and 2b and penetrates the plate 1 and the yoke 3, it can be used as a positioning jig at the time of manufacture.
  • FIG. 4B is a structural cross-sectional view of a third speaker device according to another configuration.
  • the speaker device shown in FIG. 4B includes a sealing unit 92.
  • the sealing means 92 is different from the sealing means 91 shown in FIG. 4A in the position provided in the speaker device, and is arranged outside the magnets 2a and 2b to cover the outer peripheral side of the DC magnetic flux generation source. I am doing.
  • the cover member only needs to cover at least the boundary region between the magnets 2a and 2b from the outside of the magnets 2a and 2b, and may be cylindrical or may be provided for each boundary region.
  • the sealing means 92 separates the outside of the magnets 2a and 2b from the gap between the magnets 2a and 2b and the central through hole T.
  • the sealing means 92 may be used together with a configuration in which the gap between the magnets 2a and 2b is filled with the sealing means 9 as shown in FIG. 3, but it is sealed outside the magnets 2a and 2b as shown in FIG. 4B. Even if it only stops, there exists an effect which prevents the movement to the said clearance gap by the capillary phenomenon of the magnetic fluid 7.
  • a speaker device including both the sealing means 91 of FIG. 4A and the sealing means 92 of FIG. 4B can be configured.
  • FIG. 5 is a structural cross-sectional view of the fourth speaker device according to the present disclosure.
  • the speaker device of FIG. 5 includes constituent members that can be referred to by the names of the constituent members corresponding to reference numerals 1 to 8 described for the first speaker device, but the points that are particularly different from the first speaker device will be described. Note that the top view of FIG. 5 corresponding to the top view of the first speaker device is not shown.
  • the position of the magnetic fluid 7 is different from that of the first speaker device in the fourth speaker device, and the magnetic fluid 7 is provided inside the voice coil 6, that is, on the plate 1 side.
  • the fourth speaker device includes a sealing unit 93.
  • the sealing means 93 is formed of a cylindrical nonmagnetic material and is disposed inside the magnets 2a and 2b to form a cover member that covers the inner peripheral side of the DC magnetic flux generation source.
  • the cover member only needs to cover at least the boundary region between the magnets 2a and 2b from the inside of the magnets 2a and 2b, and is not necessarily cylindrical, and may be provided for each boundary region.
  • the sealing means 93 By separating the gap between the magnets 2a and 2b and the central through hole T by the sealing means 93, the space before and after the diaphragm 4 is connected, and the cancellation of the sound before and after the diaphragm is prevented. Yes.
  • the sealing means 93 is provided with an overhanging portion 93a that protrudes on the lower surface of the yoke 3 that is a magnetic circuit constituent member surface surrounding one through end of the through hole T. It is also possible to use the sealing means 93 as a jig that can easily position the member during manufacturing. For this reason, it becomes possible to separate the space around the diaphragm 4 with higher accuracy.
  • the sealing means 93 is disposed only inside the magnets 2a and 2b. However, as shown in FIG. 3, the sealing means 93 may be used in combination with a type in which the sealing means 9 is filled in the gap between the magnets 2a and 2b. good. In this case, in addition to the effect when only the sealing means 91 is used as the sealing means, the movement of the magnetic fluid 7 to the gap due to the capillary phenomenon can be prevented. Further, the projecting portion 93a may be provided so as to project on the upper surface of the plate 1 which is the surface of the magnetic circuit constituting member surrounding the penetrating end of the through hole T on the plate 1 side. The overhanging portion 93a may be provided on both of the upper surface of 1.
  • FIG. 6A is a top view and a cross-sectional view of a fifth speaker device according to the present disclosure.
  • the speaker device of FIG. 6A includes constituent members that can be referred to by the names of the constituent members corresponding to reference numerals 1 to 8 and 91 described for the speaker device of FIG. 4A, but the points that are particularly different from the speaker device of FIG. 4A will be described.
  • the shapes of the diaphragm 4 and the voice coil 6 are two curves connecting two parallel line segments and opposite ends of the line segments as viewed in the coil axis direction. It is a track shape constituted by two symmetrical arcs.
  • the diaphragm 4 has a shape covering the area surrounded by the track-shaped voice coil 6, and the edges 5 provided so as to support the diaphragm 4 on the both end sides of the track are the frames 7. It is fixed to.
  • the plate surface of the diaphragm 4 is a region surrounded by the voice coil 6 when viewed in the coil axis direction in a region in which the concave and convex shapes are periodically repeated along the direction connecting the edges 5 facing each other across the diaphragm 4. It has a similar shape.
  • the frame 7 holds the outer surface of the yoke 3 on both ends of the track.
  • a plurality (three in this case) of through holes T are provided inside the voice coil 6.
  • the sealing means 91 having the material and shape described in FIG. 4A is disposed outside each through hole T.
  • a plurality of through holes T are arranged in a line in the direction of the line segment, and the magnets 2a and 2b provided on the inner side of the voice coil 6 connect each through hole T from both sides of the line. It is arranged so as to be sandwiched.
  • the sealing means 91 is in a state in which a gap g formed in the boundary region between the magnets 2a and 2b along the center of the row is covered from the region side of the through hole T that is inside the magnets 2a and 2b.
  • the plate 1 is provided in a shape surrounded by the voice coil 6, and the yoke 3 is provided so as to cross the region immediately below the region surrounded by the voice coil 6 in four directions.
  • Each through hole T passes through the plate 1 and the yoke 3, and the sealing means 91 covers the entire perimeter of the through region of the through hole T.
  • FIG. 6B is a top view and a cross-sectional view of a fifth speaker device according to another configuration. The difference between the speaker device of FIG. 6B and the speaker device of FIG. 6A will be described.
  • the through hole T has a long hole shape when viewed in the coil axis direction.
  • the slot has a longitudinal direction along parallel lines of the track.
  • the magnets 2a and 2b are arranged so as to sandwich the through hole T from both sides of the row.
  • the sealing means 91 is in a state in which a gap g formed in the boundary region between the magnets 2a and 2b along the longitudinal direction of the through hole T is covered from the region side of the through hole T that is inside the magnets 2a and 2b. .
  • the through hole T is formed in the shape of an elongated hole
  • the speaker device when installed in an elongated shape, when a plurality of the through holes T are arranged, the voice having an elongated shape when viewed in the coil axis direction.
  • the asymmetric distribution of the supplied magnetic flux from the magnetic circuit, which occurs when the coil 6 is used, can be improved by the long hole-shaped through hole T.
  • it is easy to form a through-hole because the shape of each magnet is complicated, non-uniform, and does not require excessive processing in order to form a through-hole having an effective size in a combined structure of a plurality of magnets.
  • a plurality of elongated hole-shaped through holes T may be provided as described with reference to FIG. 6A.
  • FIG. 6C is a top view and a structural cross-sectional view of a fifth speaker device according to still another configuration. The difference between the speaker device of FIG. 6C and the speaker device of FIG. 6A will be described. Note that the top view of FIG. 6C corresponding to the top view of FIG. 6A is omitted.
  • the speaker device in FIG. 6C includes a voice coil 6 that is rectangular when viewed in the coil axis direction.
  • the voice coil 6 has a shape in which curves, so-called fillets are provided at four corners of a rectangle, or a shape in which two sets of parallel line segments are connected by a curve. In general, it has a rectangular shape with rounded corners.
  • the inner diameter of the curved portion (R portion) of the voice coil 6 is preferably 0.5 mm or more so that the magnetic fluid 7 does not crawl up to the diaphragm 4 side at the R portion (rounded corner) due to capillary action. Accordingly, the diaphragm 4 has a shape that covers the region surrounded by the rectangular voice coil 6, and the edge 5 is provided so as to support the diaphragm 4 on a pair of opposing end sides of the rectangle. Is fixed to the frame 7.
  • the plate surface of the diaphragm 4 is a region surrounded by the voice coil 6 when viewed in the coil axis direction in a region in which the concave and convex shapes are periodically repeated along the direction connecting the edges 5 facing each other across the diaphragm 4.
  • the frame 7 holds the outer surface of the yoke 3 at both ends of the rectangle.
  • the degree of freedom of installation of the speaker device is improved similarly to the speaker device of FIG. 6A.
  • the speaker device of FIG. 6C includes magnets 2 a and 2 b inside the voice coil 6. And the long-hole-shaped through-hole T arrange
  • a gap g formed in the boundary region between the magnets 2 a and 2 b is along the longitudinal direction of the through hole T.
  • the sealing means 92 having the material and shape described in FIG. 4B is provided.
  • the plate 1 (not shown) is formed in a shape surrounded by the voice coil 6, and the yoke 3 is provided so as to cross the region immediately below the region surrounded by the voice coil 6 in four directions.
  • Each through hole T passes through the plate 1 and the yoke 3.
  • the shape of the voice coil 6 viewed in the coil axis direction can be interchanged between a circle, a track shape, a rectangle, and a rectangle with rounded corners.
  • an ellipse or a shape in which a plurality of straight line portions are joined by a curved portion can be applied.
  • the above speaker devices can be provided in speaker mounted devices such as video display devices, audio devices, AV devices, mobile phones, smartphones, tablet PCs, operation terminals, mobile information devices, home appliances, and automobiles. Thereby, speakers of various shapes can be realized.
  • speaker mounted devices such as video display devices, audio devices, AV devices, mobile phones, smartphones, tablet PCs, operation terminals, mobile information devices, home appliances, and automobiles.
  • FIG. 7 is a diagram illustrating the mobile information terminal device 201 according to the present disclosure.
  • the mobile information terminal device 201 includes a screen 202 and a speaker device 10.
  • the speaker device 10 is any speaker device selected from, for example, the first to fifth speaker devices.
  • the speaker device 10 may be attached to the mobile information terminal device 201 together with a sealed cabinet or a bass reflex cabinet. Further, the cabinet may be attached to the mobile information terminal device 201 as an open type without being attached.
  • the speaker devices 10 are arranged at three locations, but any number of speaker devices 10 may be used as long as the number is one or more. If the number of the speaker devices 10 is one, it will be monaural, but if two or more speakers are used, it can be used as a device for sound field control or HRTF.
  • the diaphragm may be directed to the sound hole side or the magnetic circuit may be directed to the sound hole side with respect to the sound hole provided in the housing.
  • FIG. 8 is a diagram illustrating the image display device 203 according to the present disclosure. More specifically, it is a PC or a thin TV.
  • the image display device 203 includes a screen 202 and a speaker device 10.
  • the speaker device 10 is any speaker device selected from, for example, the first to fifth speaker devices.
  • the speaker device 10 may be attached to the image display device 203 together with a sealed cabinet or a bass reflex cabinet. Further, the cabinet may be attached to the image display device 203 as it is without being attached.
  • the speaker devices 10 are arranged at a total of 16 locations. If one unit is monaural, two units are stereo, and if two or more units are used (for example, arranged as a line array), it can also be used as a device for sound field control or HRTF.
  • the diaphragm may be directed to the sound hole side or the magnetic circuit may be directed to the sound hole side with respect to the sound hole provided in the housing.
  • FIG. 9 is a mounting diagram of the vehicle-mounted speaker according to the present disclosure.
  • the door 204 of the automobile includes the speaker device 10.
  • the speaker device 10 is any speaker device selected from, for example, the first to fifth speaker devices.
  • the speaker device 10 may be attached to the door 204 of the automobile together with the sealed cabinet or the bass reflex cabinet. Further, the cabinet may be attached as it is to the automobile door 204 as an open type without being attached.
  • the speaker devices 10 are arranged at three locations, but any number of speaker devices may be used as long as one or more speaker devices are provided. 9 shows an example in which the speaker device 10 is attached to the door 204 of the automobile.
  • the speaker apparatus 10 may be attached to any position of the automobile such as a dashboard, pillar, seat, headrest, or ceiling of the automobile.
  • they may be attached to various moving means such as trains, monorails, linear motors, airplanes, and ships.
  • the speaker device using the magnetic fluid of the present disclosure a speaker capable of reproducing low-frequency sound can be realized even with a small size. Therefore, the same acoustic characteristics as before can be realized with a speaker that is smaller or lighter than the conventional speaker device.
  • the entire moving means is reduced in size and weight, and the comfort can be improved by increasing the living space, or the fuel efficiency can be improved by reducing the size and weight of the vehicle body.
  • the diaphragm may be directed to the sound hole side or the magnetic circuit may be directed to the sound hole side with respect to the sound hole provided in the housing.
  • FIG. 10 is a mounting diagram of the inner earphone 205 according to the present disclosure.
  • the inner earphone 205 includes an inner earphone cord 206, an ear chip 207, and a speaker device 10.
  • the speaker device 10 is any speaker device selected from, for example, the first to fifth speaker devices.
  • the speaker device 10 of the present disclosure is a sealed eartip.
  • the eartip 207 has an air hole in the ear tip umbrella portion, and an open type in which outside air can flow from the inside of the ear hole through the air hole of the ear tip. Ear tips may be used. If an open-type ear tip is used, the ear hole can be prevented from becoming stuffy. Further, the disclosure herein relates to the inner earphone 205 provided with the speaker device 10, but the speaker device 10 may be applied to a headset, a headphone, or a hearing aid.
  • the speaker device is small and has a capability of reproducing a wide band and can operate stably, so that it is useful alone as a small high-quality sound speaker. Moreover, in each apparatus which mounts a speaker, it is useful as a small high quality sound quality device.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

L'invention concerne le dispositif de haut-parleur qui est configuré pour comprendre un circuit magnétique ayant un espace magnétique, une bobine vocale (6) qui est au moins partiellement positionnée dans l'espace magnétique, un diaphragme (4) sur lequel la bobine vocale (6) est fixée, des supports multiples (5) pour supporter le diaphragme (4), et un fluide magnétique (7) qui est disposé sur la périphérie intérieure et/ou la périphérie extérieure de la bobine vocale (6). Le circuit magnétique est configuré pour comprendre au moins des aimants multiples (2a, 2b), un collier (3), et une plaque (1). Le circuit magnétique a un orifice de passage (T), qui pénètre dans la direction de vibration du diaphragme (4), sur le côté intérieur de la bobine vocale (6).
PCT/JP2013/003732 2012-06-21 2013-06-13 Dispositif de haut-parleur et dispositif équipé d'un haut-parleur WO2013190811A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012139947 2012-06-21
JP2012-139947 2012-06-21

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Publication Number Publication Date
WO2013190811A1 true WO2013190811A1 (fr) 2013-12-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108583392A (zh) * 2018-05-22 2018-09-28 黄清山 一种具有扬声器的座椅头枕
CN112055290A (zh) * 2019-06-06 2020-12-08 惠阳东亚电子制品有限公司 多磁组扬声器零件组装***及其操作方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000069586A (ja) * 1998-08-20 2000-03-03 Sony Corp スピーカ
JP2003219498A (ja) * 2002-01-25 2003-07-31 Star Micronics Co Ltd 電気音響変換器
WO2009066415A1 (fr) * 2007-11-20 2009-05-28 Panasonic Corporation Haut-parleur, dispositif vidéo et dispositif de traitement d'informations mobile
JP2011139617A (ja) * 2010-01-04 2011-07-14 Hitachi Ltd 回転電機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000069586A (ja) * 1998-08-20 2000-03-03 Sony Corp スピーカ
JP2003219498A (ja) * 2002-01-25 2003-07-31 Star Micronics Co Ltd 電気音響変換器
WO2009066415A1 (fr) * 2007-11-20 2009-05-28 Panasonic Corporation Haut-parleur, dispositif vidéo et dispositif de traitement d'informations mobile
JP2011139617A (ja) * 2010-01-04 2011-07-14 Hitachi Ltd 回転電機

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108583392A (zh) * 2018-05-22 2018-09-28 黄清山 一种具有扬声器的座椅头枕
CN112055290A (zh) * 2019-06-06 2020-12-08 惠阳东亚电子制品有限公司 多磁组扬声器零件组装***及其操作方法

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