WO2014180016A1 - 平板式低音扬声器 - Google Patents

平板式低音扬声器 Download PDF

Info

Publication number
WO2014180016A1
WO2014180016A1 PCT/CN2013/076560 CN2013076560W WO2014180016A1 WO 2014180016 A1 WO2014180016 A1 WO 2014180016A1 CN 2013076560 W CN2013076560 W CN 2013076560W WO 2014180016 A1 WO2014180016 A1 WO 2014180016A1
Authority
WO
WIPO (PCT)
Prior art keywords
fpcb
voice coil
diaphragm
woofer
flat
Prior art date
Application number
PCT/CN2013/076560
Other languages
English (en)
French (fr)
Inventor
江超
杨健斌
李志�
焦其金
Original Assignee
歌尔声学股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201310167574.3A external-priority patent/CN103260118B/zh
Priority claimed from CN201310166950.7A external-priority patent/CN103260116B/zh
Application filed by 歌尔声学股份有限公司 filed Critical 歌尔声学股份有限公司
Priority to US14/889,103 priority Critical patent/US9648424B2/en
Priority to KR1020157034780A priority patent/KR101707085B1/ko
Publication of WO2014180016A1 publication Critical patent/WO2014180016A1/zh

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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H04R9/063—Loudspeakers using a plurality of acoustic drivers
    • 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 
    • 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
    • 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
    • H04R2400/00—Loudspeakers
    • H04R2400/03—Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • 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
    • 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
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/01—Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control

Definitions

  • the present invention relates to the field of acoustic power technology, and more particularly to a flat type woofer. Background technique
  • the woofer of the conventional structure usually adopts a cone-shaped diaphragm, the center of the cone diaphragm contains a voice coil, and the magnetic circuit system is relatively large and thick.
  • the subwoofer of this structure has a large thickness, which cannot meet the demand for the increasingly thinner electronic products, and is not practical.
  • the woofer usually has a larger aperture in order to ensure its low-frequency sound, that is, a larger diaphragm area.
  • a flat diaphragm is used, combined with a voice coil structure (the voice coil needs to be located near the edge), the large diaphragm requires a larger voice coil size, which is difficult to twist and easier to deform.
  • the size of the magnet of the existing woofer is relatively large, and the thickness of the washer and the basin is small in the thinning application, the magnetic circuit system is easily saturated, the performance of the magnet is excessive, waste is caused, and the cost is high.
  • an object of the present invention is to provide a flat-type woofer for realizing thinning of a woofer and solving the problem of thick voice coils and excessive performance of magnets.
  • the invention provides a flat-type woofer comprising a diaphragm, four mutually independent driving units and a casing for accommodating a fixed diaphragm and a driving unit; wherein the driving unit comprises a separate voice coil unit and a voice coil unit corresponding thereto a magnetic circuit unit; the voice coil unit is respectively attached and fixed to the diaphragm; and,
  • the flat-type woofer further includes an FPCB connecting an internal circuit of the speaker and an external circuit, the FPCB being disposed on both sides of the casing, wherein the FPCB is disposed on a side of the casing close to the side of the voice coil unit and electrically connected to the voice coil lead, A portion of the housing that is away from the side of the voice coil unit is electrically connected to an external circuit of the speaker.
  • the diaphragm has a rectangular structure including a rigid ball top at a central position and a folded portion at an edge position; a voice coil unit is attached to each of the four corners of the top of the ball; The edge of the portion is fixedly coupled to the upper side of the outer casing.
  • the outer casing includes a mounting plane and an annular side wall around the mounting plane, and the mounting plane is provided with a mounting hole for receiving the fixed magnetic circuit unit and an sounding hole penetrating the mounting plane; the sound hole is disposed at The central sound hole of the installation center position and the edge sound hole disposed between the annular side wall and the mounting hole; the FPCB connects the structures on both sides of the mounting plane through the sound hole.
  • the FPCB is clamped and fixed on the mounting plane of the edge of the center sound hole, a part of the FPCB is on the side of the mounting plane close to the diaphragm, and the other part is on the side of the mounting plane away from the diaphragm.
  • the FPCB includes two mutually independent portions, each of which is electrically connected to two adjacent voice coil units.
  • a preferred solution is that the FPCB portion is fixedly attached to one side of the diaphragm that is attached to the voice coil unit, and the portion of the FPCB that is not fixed to the diaphragm extends through the sound hole to a side of the mounting plane away from the diaphragm.
  • the FPCB is elongated; the middle portion of the FPCB is fixedly attached to the diaphragm, and the two ends extend through the edge sound hole to the side of the mounting plane away from the diaphragm.
  • a preferred solution is that the front and back sides of the FPCB are provided with pads, and the pads disposed on the front and back sides of the FPCB are respectively in one-to-one correspondence;
  • the flat woofer of the present invention can achieve the following beneficial effects:
  • the structure makes it possible to drive a diaphragm of a large-sized woofer with a small-sized voice coil unit and a magnetic circuit unit, which can reduce the thickness of the woofer, save the size of the magnet, reduce the cost, and improve the sensitivity of the speaker.
  • the structure of the driving unit disposed at the corner portion facilitates the balanced diaphragm of the driving woofer;
  • the outer casing is made of aluminum alloy material, and the aluminum alloy material has relatively high strength and high stability;
  • FPCB Flexible Printed Circuit Board
  • FPCB or FPC, flexible printed circuit board is used to connect the voice coil and the external circuit, which saves space and is directly connected to the lead on the mounting surface or the voice coil combined with the diaphragm.
  • the FPCB's pad soldering minimizes the length of the leads, enhances product stability, and makes full use of the internal space of the woofer to make the product thinner.
  • FIG. 1 is a schematic structural view of a flat-type woofer according to a first embodiment of the present invention
  • FIG. 2 is a schematic structural view of an FPCB according to a first embodiment of the present invention
  • FIG. 3-1 and 3-2 are respectively schematic diagrams of four voice coils according to the first embodiment of the present invention.
  • FIG. 4 is a front view of the FPCB and the outer casing according to the first embodiment of the present invention;
  • FIG. 5 is a schematic view of the reverse side of the FPCB and the outer casing according to the first embodiment of the present invention
  • FIG. 6 is a schematic structural view of a flat type woofer of six driving units according to a second embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of an FPCB according to Embodiment 2 of the present invention.
  • FIGS. 9-1 and 9-2 are respectively schematic diagrams of six voice coils according to a second embodiment of the present invention.
  • the reference numerals include: ball top 1, folding ring 2, outer casing 3, mounting hole 4, drive list Element 5, FPCB 6, center sound hole 7, edge sound hole 8, mounting plane 9, annular side wall 10, pad 11, FPCB front A, FPCB reverse B, fixing hole 12, circuit 13, voice coil lead 14 .
  • the woofer requires a large diaphragm area.
  • the present invention makes the vibration from the viewpoint of dispersing a plurality of independent driving units.
  • the membrane is driven by a plurality of independent voice coils, each of which corresponds to a separate magnetic circuit unit, thereby miniaturizing the woofer by driving the unit layout structure more reasonably and efficiently.
  • FIG. 1 is a schematic structural view of a flat type woofer according to a first embodiment of the present invention.
  • the tablet woofer provided by the present invention comprises a diaphragm, four mutually independent drive units 5 and a casing 3.
  • the diaphragm is a flat rectangular structure, and the shape thereof may be a rectangle or a square, and includes a rigid ball top 1 of the diaphragm at the center position and a folding portion 2 of the diaphragm at the edge position, and a folding portion The edge of 2 is fixedly coupled to the upper side of the outer casing.
  • the ratio of the equivalent radius of the effective radiation area of the ball top 1 and the width of the folded portion is limited to a range of 4 to 15, that is, 4 ⁇ effective radius of the effective radiation area:
  • the width of the loop portion is ⁇ 15.
  • the ball top of the diaphragm 1 is made of aluminum alloy to ensure its hardness and rigidity, and the rigid structure can improve the acoustic properties of the diaphragm.
  • the dome 1 of the diaphragm may also be a honeycomb structure or a foam structure, which also enhances the acoustic properties of the diaphragm.
  • the folded portion 2 of the diaphragm can be made of PU (Polyurethane, Polyurethane) or silicone rubber.
  • the drive unit 5 includes a voice coil unit and a magnetic circuit unit, and each voice coil unit corresponds to each magnetic circuit unit.
  • the flat type woofer in the first embodiment includes four driving units, and the four driving units 5 can be respectively disposed at the four corners of the dome 1 of the diaphragm; if the flat woofer includes four
  • the above driving unit can uniformly set the voice coil unit of the driving unit at the periphery of the ball top 1 of the diaphragm, or can be arranged on the top of the ball in a distributed irregular arrangement. To avoid resonance.
  • the drive unit is circular and includes a circular voice coil unit and a circular magnetic circuit unit.
  • the voice coil unit includes a voice coil, a voice coil bobbin, and a centering piece
  • the magnetic circuit unit includes a washer, a magnet, and a tau iron.
  • the voice coil is fixed in combination with the diaphragm, and the voice coil bobbin is used to support the voice coil so that the voice coil is in the proper position in the magnetic gap.
  • the centering piece is used to fix the voice coil and prevent the voice coil from being polarized in the horizontal direction.
  • the driving unit has a circular structure, and the structural design can make the force of the diaphragm more uniform than the rectangular voice coil.
  • Both the Huashi and the zirconia are magnetically permeable structures for correcting magnetic lines of force; the magnetic gap formed between the magnet and the zirconia is used to accommodate the voice coil.
  • the driving unit 5 is four, and four of the voice coil units are respectively disposed on the diaphragm at the four corner positions corresponding to the top 1 of the ball, which is beneficial to the voice coil of the driving unit 5.
  • This structure uses a small-sized voice coil unit and magnetic circuit unit to drive the diaphragm of a large-sized woofer, which can reduce the thickness of the woofer, save the size of the magnet, reduce the cost, and improve the sensitivity of the woofer.
  • the four driving units 5 act on the diaphragm and have a uniform driving force, which can ensure a sufficiently large driving power on the basis of reducing the volume of the driving unit, thereby making the product thinner, and the performance can make the flat woofer of the present invention For high-power electronic devices, such as LCD TVs.
  • the outer casing 3 includes a mounting plane 9 and an annular side wall 10 around the mounting plane, and a fixing hole (not shown in Fig. 1) may be provided at the edge of the annular side wall 10 so that the flat woofer is fixedly coupled to the electronic device.
  • the fixing hole may be disposed on the side of the annular side wall away from the diaphragm, or a ring extension may be added around the annular side wall. In order to balance the fixed force, the fixing hole is generally uniformly disposed on the edge.
  • the outer casing 3 is made of an aluminum alloy material, and the aluminum alloy material has relatively high strength and high stability.
  • the mounting plane 9 is provided with a mounting hole 4 corresponding to the number and position of the driving unit and an sounding hole penetrating the mounting plane.
  • the mounting hole 4 of the mounting plane 9 is provided with a limiting portion for defining the position of the centering piece, and is mounted.
  • the hole 4 is for accommodating the voice coil unit and mounting a fixed magnetic circuit unit.
  • the sound hole includes a central sound hole 7 and an edge sound hole 8, and the center sound hole 7 is disposed at a center position of the mounting plane 9, corresponding to the diaphragm intermediate portion, and the edge sound hole 8 is disposed at the annular side wall 10 and Between the mounting holes 4, the edge sound holes 8 are provided on the edges corresponding to the center sound holes 7 with respect to the entire mounting plane.
  • the size of the center sound hole 7 is larger than the size of the edge sound hole 8, the total area of the sound hole and the flat plate
  • the ratio of the effective radiating area of the woofer is 0.07 ⁇ 0.6; the top 1 of the diaphragm produces more airflow, and the large sounding hole facilitates the circulation of the airflow.
  • a central sound hole 7 is provided at a position corresponding to the portion on the mounting plane 9, and the center is out.
  • the sound hole 7 is large in size for more airflow to flow in or out therefrom.
  • the edge sound hole 7 is elongated, and is disposed in parallel with the center sound hole 8 on the mounting plane.
  • the edge sound holes can also be designed to be circular or other irregular shapes depending on the needs of the speaker application.
  • the upper side of the annular side wall 10 of the outer casing is fixedly coupled to the edge of the folded portion 2 of the diaphragm.
  • the flat-type woofer also includes an FPCB 6 that connects internal circuits of the speaker and external circuits.
  • the FPCB of the present invention is disposed on both sides of the casing, and a part of the FPCB is disposed on a side of the casing close to the voice coil unit, and the voice coil unit is electrically connected to the voice coil unit.
  • the other part is disposed on the side of the casing away from the voice coil unit and is electrically connected to the external circuit of the speaker.
  • FIG. 2 is a schematic structural view of an FPCB according to a first embodiment of the present invention.
  • the FPCB in the first embodiment has a T-shaped structure and includes two mutually independent portions, each of which is electrically connected to two adjacent voice coil units.
  • the front surface A and the back surface B of the FPCB 6 are respectively provided with pads 11 respectively, and the pads 11 disposed on the front and back sides of the FPCB are respectively in one-to-one correspondence, and the pads 11 disposed on the front surface A of the FPCB are electrically connected to each of the voice coil units, respectively, and
  • the series-parallel relationship between the voice coil units is controlled by connecting the pads 11 provided on the reverse side B of the FPCB to an external circuit.
  • the pad 11 on the front side of the FPCB near the voice coil unit is electrically connected to the voice coil lead, and the pad 11 on the opposite side of the side away from the voice coil unit is electrically connected to the external circuit of the speaker.
  • the specific shape of the FPCB can be adjusted according to the requirements of the electronic device, and the circuit arrangement of the pad is not limited to the case shown in FIG. 2, and other arrangement manners can be selected according to specific product requirements.
  • the coils can be flexibly connected in series, parallel or series-parallel by utilizing the circuit between the pads.
  • the following is an exemplary description of the electrical connection of only two voice coil units.
  • Figures 3-1 and 3-2 show four voice coil connection diagrams, respectively, in accordance with an embodiment of the present invention.
  • the two voice coil units belonging to the same straight line side are connected in series as two branches, and then the two branches are connected in parallel through the FPCB.
  • the two branches are connected in parallel through the FPCB.
  • they will be located at the same diagonal corner.
  • the two voice coils are connected in series to two branches, and then the two branches are connected in parallel via the FPCB.
  • An electronic device (such as a liquid crystal television) is electrically connected to a side of the FPCB that is away from the mounting plane, and the FPCB is clamped to a mounting plane that is fixed to the edge of the center sound hole.
  • the FPCB adopts a polyimide copper clad laminate substrate and has a rigid structure. Compared with the existing plastic structure, the polyimide copper clad laminate substrate has strong elasticity. It is not easy to break.
  • FIG 4 and 5 are schematic views showing the front and back sides of the FPCB and the casing, respectively, according to the first embodiment of the present invention.
  • the FPCB 6 used in this embodiment is disposed on both sides of the outer casing 3, wherein the side of the FPCB adjacent to the voice coil unit is electrically connected to the voice coil lead, and the side away from the voice coil unit is The external circuit of the speaker is electrically connected.
  • the FPCB 6 connects the structures on both sides of the mounting plane 9 through the sound holes. Further, the FPCB 6 and the outer casing 3 are fixedly coupled by bonding or snapping.
  • the FPCB 6 is T-shaped and is clamped and fixed to the mounting plane 9 at the edge of the center sound hole 7.
  • a plurality of pads (not shown in Figs. 4 and 5) are disposed on the FPCB 6, and the pads are connected to the voice coil unit and an external circuit.
  • the FPCB 6 Since the FPCB 6 is clamped and fixed on the mounting plane, a part of the FPCB 6 is on the side of the mounting plane 9 near the diaphragm, and the other part is on the side of the mounting plane 9 away from the diaphragm.
  • the FPCB is used to electrically connect the driving unit and the external circuit, and the FPCB can simplify the manufacturing process compared with the ordinary wire connection method, FPCB It is only combined with the mounting plane, making full use of the gap between the magnetic circuit units on the mounting plane, making full use of the internal space of the woofer, saving the internal space of the speaker, and improving the stability of the speaker.
  • the number of driving units is not limited to four, and may be six or more, and such an FPCB may be used for electrical connection.
  • Fig. 6 is a schematic view showing the structure of a flat type woofer of six driving units according to a second embodiment of the present invention.
  • the flat woofer provided in the second embodiment comprises a diaphragm, six independent drive units 5 and a casing 3. Similarly, four voice coil units are attached and fixed to the four corner portions of the top portion 1 of the diaphragm, and the edge of the loop portion 2 is fixedly coupled to the upper side of the outer casing 3.
  • Housing 3 includes mounting a plane 9 and an annular side wall 10 around the mounting plane, on the mounting plane 9 are provided six mounting holes 4 for accommodating the voice coil unit and mounting the fixed magnetic circuit unit corresponding to the number and position of the driving units, and a through-mounting plane
  • the edge sound holes can also be designed to be circular or other irregular shapes depending on the needs of the speaker application.
  • two voice coil units are respectively disposed on a pair of opposite sides of the top of the ball.
  • the corresponding voice coil units can be evenly placed on the top of the rectangular ball or on the opposite sides of the two sets.
  • the two voice coil units respectively disposed on a pair of opposite sides are on the same straight line as the voice coil unit at the other two corner positions of the side, and are evenly arranged to
  • the driving force of the equalizing drive unit to the diaphragm drives the diaphragm to move up and down. It can also be set to be out of line with the two voice coil units on the side and unevenly arranged to avoid resonance of the diaphragm.
  • the fixing hole 12 for fixing the flat type woofer to the electronic device is disposed on the extension of the periphery of the annular side wall.
  • the FPCB 6 used in the second embodiment has an elongated shape, and the intermediate portion is fixedly attached to one side of the diaphragm to which the voice coil unit is attached, and the two ends are not vibrated.
  • the film-bonded fixed portion extends through the edge sound hole to the side of the mounting plane 9 away from the diaphragm.
  • FIG. 7 is a schematic structural diagram of an FPCB according to a second embodiment of the present invention.
  • a circuit 13 is disposed at an end of the FPCB to be connected to an external circuit; a middle portion of the FPCB is provided with a plurality of pads 11, and the voice coil unit is fixed to the diaphragm through the voice coil lead and the FPCB. Portions of the pads 11 are electrically connected.
  • the middle portion of the FPCB 6 is fixed to the side of the diaphragm combined with the voice coil unit, and the portion of the FPCB 6 that is not fixed to the diaphragm (ie, the end portions) can extend through the edge of the outer casing to the side of the mounting plane away from the diaphragm. .
  • Both ends of the FPCB are bent in an arc shape to a position parallel to the mounting plane. This structure can make full use of the internal space of the woofer and avoid the disconnection caused by the pulling of the lead during vibration of the diaphragm.
  • FIG. 8 is a schematic view showing the installation of an FPCB in a flat-type woofer according to a second embodiment of the present invention.
  • the intermediate portion of the FPCB 6 is mounted on the side of the diaphragm in which the voice coil unit is coupled, and the voice coil unit is electrically connected to the pad 11 provided on the portion of the FPCB 6 fixed to the diaphragm through the voice coil lead 14.
  • Both ends of the FPCB 6 extend through the sound hole to the side of the mounting plane away from the diaphragm.
  • Both ends of FPCB6 The portion is curved in an arcuate configuration to a position parallel to the mounting plane.
  • the front and back sides of the FPCB 6 are provided with pads 11 respectively, and the pads disposed on the front and back sides of the FPCB 6 are respectively in one-to-one correspondence; wherein the pads disposed on the front surface of the FPCB 6 are electrically connected to each of the voice coil units respectively, and are disposed on the FPCB 6
  • the opposite pad 11 controls the series-parallel relationship between the voice coil units.
  • Figures 9-1 and 9-2 show six voice coil connection diagrams, respectively, in accordance with an embodiment of the present invention.
  • the six voice coils are connected by connecting three voice coil units on the same straight line in series to two branches, and then connecting the two branches in parallel.
  • six voice coils are connected: Separate the two voice coils at the same straight corner and the voice coil in the middle of the opposite side into two branches, and then connect the two branches in parallel.
  • the flat woofer can work normally, because there is another branch evenly distributed in the diaphragm ball.
  • the area on the top makes the diaphragm evenly stressed.
  • the resistance of the FPCB to the diaphragm can be minimized when the diaphragm vibrates, and the diaphragm can be evenly stressed.
  • the flat-type woofer provided by the present invention adopts at least four driving units disposed at four corners of the top of the ball of the diaphragm, and two or more drives can be disposed on the long axis.
  • this structure not only facilitates the stable combination of the voice coil and the diaphragm of the drive unit, but also reduces the thickness of the woofer by using a small-sized voice coil unit and a magnetic circuit unit to drive the diaphragm of a large woofer. Save the size of the magnet to reduce the cost and increase the sensitivity of the woofer.
  • the driving units on the same side of the long axis side are arranged not on the same straight line and the pitch ratio is not an integer ratio, and between the two driving units located at the intermediate position on the side edges.
  • the spacing between the two driving units is smaller than the spacing between the two driving units at the corners.
  • the present invention uses the FPCB to connect the voice coil and the external circuit, which can save space, and the lead of the voice coil combined with the diaphragm is directly soldered to the pad of the FPCB, thereby avoiding the break of the voice coil lead due to the vibration of the diaphragm. line.
  • a flat-type woofer according to the present invention has been described by way of example with reference to the accompanying drawings. However, it will be understood by those skilled in the art that various improvements can be made to the flat-type woofer proposed by the present invention without departing from the scope of the present invention. Therefore, the scope of the invention should be determined by the content of the appended claims.

Landscapes

  • 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)

Abstract

本发明提供一种平板式低音扬声器，包括振膜、至少四个相互独立的驱动单元以及收容固定振膜和驱动单元的外壳；驱动单元包括独立的音圈单元和与音圈单元相对应的磁路单元；音圈单元分别贴合固定在振膜上；平板式低音扬声器还包括连通扬声器的内部电路和外部电路的 FPCB， FPCB设置在外壳的两侧，其中，FPCB设置在外壳靠近音圈单元的一侧的部分与音圈单元通过音圈引线电连接，设置在外壳远离音圈单元的一侧的部分与扬声器的外部电路电连接。本发明提供的平板式低音扬声器，能够解决音圈厚重和磁铁性能过剩的问题。

Description

平板式低音扬声器
技术领域
本发明涉及声电技术领域， 更为具体地， 涉及一种平板式低音扬声器。 背景技术
随着社会的进步和技术的发展， 近年来， 电视机等电子产品体积不断减 小日趋薄型化， 人们对这些电子产品的性能要求也越来越高， 从而也要求与 之配套的电子零件的体积不断厚度也在减小、 性能和一致性不断提高。
传统结构的低音扬声器通常采用锥形纸盆状的振膜， 锥形振膜的中心位 置包含一个音圈， 而且磁路系统的尺寸比较大也比较厚。 这种结构的低音扬 声器， 产品的厚度较大， 无法满足目前电子产品日趋薄型化的需求， 实用性 不强。
并且， 低音扬声器为了保证其低频声效通常具有更大的口径， 即具有更 大的振膜面积。 若采用一个平板状振膜， 结合有一个音圈的结构 （音圈需要 位于靠近边缘的位置）， 大面积的振膜要求音圈尺寸也要比较大， 绕制困难， 较易变形。 另外， 现有的低音扬声器的磁铁尺寸比较大， 薄型化应用时华司 和盆架厚度都较小， 磁路系统容易饱和， 磁铁性能过剩， 造成浪费， 而且成 本较高。
基于以上因素， 需要对传统结构的产品进行改进。 发明内容
鉴于上述问题， 本发明的目的是提供一种平板式低音扬声器， 以实现低 音扬声器的薄型化， 并且解决音圈厚重和磁铁性能过剩的问题。 本发明提供一种平板式低音扬声器， 包括振膜、 四个相互独立的驱动单 元以及收容固定振膜和驱动单元的外壳； 其中， 驱动单元包括独立的音圈单 元和与音圈单元相对应的磁路单元； 音圈单元分别贴合固定在振膜上； 并且， 平板式低音扬声器还包括连通扬声器的内部电路和外部电路的 FPCB， FPCB设置在所述外壳的两侧， 其中， FPCB设置在外壳靠近音圈单元的一侧 的部分与音圈引线电连接， 设置在外壳远离音圈单元的一侧的部分与扬声器 的外部电路电连接。
此外， 优选的方案是， 振膜为矩形结构， 包括位于中心位置的刚性的球 顶部和位于边缘位置的折环部； 在球顶部的四个角部分别贴合有一个音圈单 元； 折环部的边缘与外壳的上侧面固定结合。
此外， 优选的方案是， 外壳包括安装平面和安装平面周围的环形侧壁， 在安装平面上设置有收容固定磁路单元的安装孔和和贯通安装平面的出声 孔； 出声孔包括设置在安装平面中心位置的中心出声孔以及设置在环形侧壁 和安装孔之间的边缘出声孔； FPCB通过出声孔使安装平面两侧的结构相连 接。
此外， 优选的方案是， FPCB夹持固定在中心出声孔边缘的安装平面上， FPCB的一部分处于安装平面靠近振膜的一侧，另一部分处于安装平面远离振 膜的一侧。
此外， 优选的方案是， FPCB包括相互独立的两部分， 每部分与邻近的两 个音圈单元电连接。
此外，优选的方案是， FPCB部分贴合固定在振膜上贴合音圈单元的一侧， FPCB未与振膜贴合固定的部分通过出声孔延伸至安装平面远离振膜的一侧。
此外， 优选的方案是， FPCB为长条形； FPCB的中部贴合固定在振膜上， 两端部通过边缘出声孔延伸至安装平面远离振膜的一侧。
此外， 优选的方案是， FPCB的正反两面均设置有焊盘， 设置在 FPCB正 反两面的焊盘分别一一对应； 其中，
设置在 FPCB正面的焊盘分别与每一个音圈单元电连接， 并且， 通过设 置在 FPCB反面的焊盘控制音圈单元之间的串并联关系。 从上面的技术方案可知， 本发明的平板式低音扬声器， 能够取得以下有 益效果：
1 )在振膜的球顶部的四个角部分别设置有四个驱动单元， 其余的驱动单 元相对均匀地设置在角部的驱动单元所形成的一组或者两组对边上， 这种结 构能够使得采用小尺寸的音圈单元和磁路单元驱动大尺寸的低音扬声器的振 膜成为可能， 能够减少低音扬声器的厚度， 还能够节省磁铁的尺寸降低成本， 提高扬声器的灵敏度， 并且这种驱动单元设置于角部的结构有利于平衡的驱 动低音扬声器的振膜；
2) 外壳采用铝合金材料， 铝合金材料强度比较大， 稳定性高；
3 ) 采用 FPCB (Flexible Printed Circuit Board, 简称 FPCB或 FPC， 挠性 印刷电路板） 连接音圈和外电路， 能够节省空间， 且结合于安装面上或者与 振膜结合的音圈的引线直接与 FPCB的焊盘焊接， 能够尽量缩短引线的长度， 增强产品的稳定性， 并且充分利用低音扬声器的内部空间， 使产品更薄。 为了实现上述以及相关目的， 本发明的一个或多个方面包括后面将详细 说明并在权利要求中特别指出的特征。 下面的说明以及附图详细说明了本发 明的某些示例性方面。 然而， 这些方面指示的仅仅是可使用本发明的原理的 各种方式中的一些方式。 此外， 本发明旨在包括所有这些方面以及它们的等 同物。 附图说明
通过参考以下结合附图的说明及权利要求书的内容， 并且随着对本发明 的更全面理解， 本发明的其它目的及结果将更加明白及易于理解。 在附图中： 图 1为根据本发明实施例一的平板式低音扬声器的结构示意图； 图 2为根据本发明实施例一的 FPCB结构示意图；
图 3-1和图 3-2分别为根据本发明实施例一的四个音圈连接示意图； 图 4为根据本发明实施例一的 FPCB与外壳正面示意图；
图 5为根据本发明实施例一的 FPCB与外壳反面示意图；
图 6为根据本发明实施例二的六个驱动单元的平板式低音扬声器的结构 示意图；
图 7为根据本发明实施例二的 FPCB的结构示意图；
图 8为根据本发明实施例二的 FPCB在平板式低音扬声器的安装示意图； 图 9-1和图 9-2分别为根据本发明实施例二的六个音圈连接示意图。
其中的附图标记包括： 球顶部 1、 折环部 2、 外壳 3、 安装孔 4、 驱动单 元 5、 FPCB 6、 中心出声孔 7、 边缘出声孔 8、 安装平面 9、 环形侧壁 10、 焊 盘 11、 FPCB正面 A、 FPCB反面 B、 固定孔 12、 电路 13、 音圈引线 14。
在所有附图中相同的标号指示相似或相应的特征或功能。 具体实施方式
在下面的描述中， 出于说明的目的， 为了提供对一个或多个实施例的全 面理解， 阐述了许多具体细节。 然而， 很明显， 也可以在没有这些具体细节 的情况下实现这些实施例。 以下将结合附图对本发明的具体实施例进行详细 描述。
低音扬声器需要较大的振膜面积， 为了在限制音圈和磁铁尺寸的基础上 给大面积的振膜提供足够的驱动， 本发明从分散布置多个相互独立的驱动单 元的角度出发， 使得振膜由多个独立的音圈驱动， 每个音圈对应独立的磁路 单元， 从而以更合理有效地驱动单元布设结构实现低音扬声器的小型化。
图 1为根据本发明实施例一的平板式低音扬声器的结构示意图。
如图 1 所示， 本发明提供的平板式低音扬声器， 包括振膜、 四个相互独 立的驱动单元 5和外壳 3。
其中， 振膜为平板状矩形结构， 其形状可以是长方形， 也可以是正方形， 包括位于中心位置的振膜的刚性的球顶部 1 和位于边缘位置的振膜的折环部 2，折环部 2的边缘与外壳的上侧面固定结合。为了增大振膜的有效振动面积， 在本发明中，球顶部 1有效辐射面积等效半径和折环部宽度的比例限定在 4〜 15的范围内， 即 4〈有效辐射面积等效半径： 折环部宽度〈15。
振膜的球顶部 1 采用铝合金材料制成， 以保障其硬度和刚性结构， 刚性 结构能够提升振膜声学特性。 在本发明的实施中， 振膜的球顶部 1 也可以为 蜂窝结构或者发泡体结构， 这两种结构也能够提升振膜声学特性。 振膜的折 环部 2可以采用 PU(Polyurethane， 聚氨基甲酸酯)或硅橡胶制作。
驱动单元 5包括音圈单元和磁路单元， 每个音圈单元与每个磁路单元相 对应。 在该实施例一中的平板式低音扬声器中包含四个驱动单元， 可以将四 个驱动单元 5分别设置在振膜的球顶部 1 的四个角部； 如果该平板式低音扬 声器中包含四个以上驱动单元， 可以将驱动单元的音圈单元均匀设置在振膜 的球顶部 1 的周边位置， 也可以以分散的不规则排列方式设置在球顶部上， 以避免谐振。
驱动单元为圆形， 包括圆形的音圈单元和圆形的磁路单元。 其中， 音圈 单元包括音圈、 音圈骨架、 定心支片， 磁路单元包括华司、 磁铁、 τ铁。 音圈 与振膜结合固定， 音圈骨架用于支持音圈， 使音圈在磁间隙中位于合适的位 置。 定心支片用于固定音圈， 防止音圈在水平方向发生偏振。
在本发明的实施例中， 驱动单元为圆形结构， 与长方形的音圈相比这种 结构设计能够使振膜的受力更加均匀。 华司和 τ铁均为导磁结构， 用于修正 磁力线； 磁铁和 τ铁之间形成的磁间隙用于容纳音圈。
在图 1所示的实施例一中， 驱动单元 5为四个， 其中的四个音圈单元分 别设置在振膜上对应球顶部 1 的四个角部位置， 有利于驱动单元 5的音圈与 振膜稳定的结合， 并且使振膜能够平衡的驱动。
这种结构采用小尺寸的音圈单元和磁路单元驱动大尺寸的低音扬声器的 振膜， 能够减少低音扬声器的厚度， 还能够节省磁铁的尺寸降低成本， 提高 低音扬声器的灵敏度。 四个驱动单元 5 作用于振膜， 驱动力均匀， 能够在降 低驱动单元体积的基础上保证足够大的驱动功率， 从而使产品更加薄型化， 这种性能能够使本发明的平板式低音扬声器用于功率较大的电子装置， 如液 晶电视机等。
外壳 3包括安装平面 9和安装平面周围的环形侧壁 10， 可以在环形侧壁 10的边缘设置固定孔（未在图 1中标出）， 以便该平板式低音扬声器与电子装 置固定结合。 固定孔可以设置在环形侧壁上远离振膜的一侧， 也可以在环形 侧壁周边增加一圈延伸部， 为了平衡固定的力量， 一般将固定孔均匀设置在 该边缘上。
外壳 3采用铝合金材料， 铝合金材料强度比较大， 稳定性高。
在安装平面 9上设置有与驱动单元数目和位置对应的安装孔 4以及贯通 安装平面的出声孔， 在安装平面 9的安装孔 4中设置有限定定心支片位置的 限位部， 安装孔 4用于容纳音圈单元并且安装固定磁路单元。 出声孔包括中 心出声孔 7和边缘出声孔 8， 中心出声孔 7设置在安装平面 9的中心位置， 与 振膜中间区域相对应， 边缘出声孔 8设置在环形侧壁 10和安装孔 4之间， 相 对于整个安装平面而言， 边缘出声孔 8设置在与中心出声孔 7对应的边缘上。
中心出声孔 7的尺寸大于边缘出声孔 8的尺寸， 出声孔的总面积和平板 式低音扬声器的有效辐射面积的比值为 0.07〜0.6； 振膜的球顶部 1产生的气 流较多， 大的出声孔有利于气流的流通。
对于长方形的振膜， 振膜中间的区域比较大， 该部分振膜的产生的气流 也较多， 因此， 在安装平面 9上对应于该部分的位置设有中心出声孔 7， 而且 中心出声孔 7的尺寸较大， 以供较多的气流从此处流入或流出。
在图 1所示的实施例一中， 边缘出声孔 7为长条形， 和中心出声孔 8平 行设置在安装平面上。 当然， 也可以根据扬声器应用的需求将边缘出声孔设 计为圆形或者其他不规则形状。
外壳的环形侧壁 10的上侧面与振膜的折环部 2边缘固定结合。
平板式低音扬声器还包括连通扬声器的内部电路和外部电路的 FPCB6, 本发明中的 FPCB 设置在外壳两侧， 其中一部分设置在外壳靠近音圈单元的 一侧， 与音圈单元通过音圈引线电连接； 另一部分设置在外壳远离音圈单元 的一侧， 与扬声器的外部电路电连接。
图 2为根据本发明实施例一的 FPCB结构示意图。 如图 2所示， 本实施 例一中的 FPCB为 T形结构， 包括相互独立的两部分， 每部分与邻近的两个 音圈单元电连接。 FPCB6的正面 A和反面 B均设置有焊盘 11， 设置在 FPCB 正反两面的焊盘 11分别一一对应， 设置在 FPCB正面 A的焊盘 11分别与每 一个音圈单元电连接， 并且， 通过设置在 FPCB反面 B的焊盘 11与外部电路 连接， 控制音圈单元之间的串并联关系。 gP : FPCB靠近音圈单元的一侧正面 的焊盘 11与音圈引线电连接， 远离音圈单元的一侧反面的焊盘 11与扬声器 的外部电路电连接。
需要说明的是， FPCB 的具体形状可以根据电子装置的需求情况进行调 整， 焊盘的电路排布也不限于图 2所示情况， 可以根据具体的产品需求选择 其它的排布方式。
在电连接音圈的过程中， 利用焊盘之间的电路， 音圈之间可以以串联、 并联或者串并联结合的方式灵活连接。 下面仅以两种音圈单元的电连接方式 进行示例性说明。
图 3-1和图 3-2分别示出了根据本发明实施例的四个音圈连接示意图。如 图 3-1所示，分别将将属于同一直线边上的两个音圈单元串联为两个支路，然 后通过 FPCB将两条支路并联。如图 3-2所示， 分别将位于同一对角线角部的 两音圈串联为两个支路， 然后通过 FPCB将将两条支路并联。
电子装置（如液晶电视）与 FPCB远离安装平面的一侧电连接， FPCB夹 持固定于中心出声孔边缘的安装平面上。
其中，在本发明的一个具体实施方式中， FPCB采用聚酰亚胺覆铜板基材， 为刚性结构， 与现有的塑料结构相比， 聚酰亚胺覆铜板基材具有较强的弹性， 不容易发生断裂。
图 4和图 5分别示出了根据本发明实施例一的 FPCB与外壳正面和反面 示意图。
如图 4和图 5所示， 本实施例一种采用的 FPCB6设置在外壳 3的两侧， 其中， FPCB靠近音圈单元的一侧与音圈引线电连接， 远离音圈单元的一侧与 扬声器的外部电路电连接。 FPCB6通过出声孔使安装平面 9两侧的结构相连 接。 并且， FPCB6与外壳 3通过粘接或者卡合的方式固定结合。
在本实施例一中， FPCB 6为 T形， 夹持固定在中心出声孔 7边缘的安装 平面 9上。 在 FPCB 6上面设置有多个焊盘 （在图 4和图 5未标出）， 焊盘与 音圈单元和外部电路相连接。
由于 FPCB 6是夹持固定在安装平面上的， 因此 FPCB6的一部分处于安 装平面 9靠近振膜的一侧， 另一部分处于安装平面 9远离振膜的一侧。
由于本发明采用的驱动单元较多， 因此， 在本发明的实施例一中， 采用 FPCB进行电连接驱动单元和外部电路， 相比较于普通的导线连接方式， 采用 FPCB能够使制造工艺简化， FPCB仅结合于安装平面上， 充分的利用了安装 平面上磁路单元之间的间隙， 充分的利用低音扬声器的内部空间， 节省扬声 器的内部空间， 并且能够提高扬声器的稳定性。 此外， 驱动单元的数量不限 于四个， 也可以为六个或更多个， 均可采用这种 FPCB进行电连接。
下面将继续以采用六个驱动单元的平板式低音扬声器为例对采用 FPCB 电连接扬声器的驱动单元和外部电路的应用进行说明。
图 6为根据本发明实施例二的六个驱动单元的平板式低音扬声器的结构 示意图。
如图 6所示， 实施例二提供的平板式低音扬声器包括振膜、 六个相互独 立的驱动单元 5和外壳 3。 同样， 振膜球顶部 1的四个角部位置贴合固定有四 个音圈单元， 折环部 2的边缘与外壳 3的上侧面固定结合。 外壳 3包括安装 平面 9和安装平面周围的环形侧壁 10， 在安装平面 9上设置有与驱动单元数 目和位置对应的六个用于容纳音圈单元并且安装固定磁路单元的安装孔 4 以 及贯通安装平面的六个出声孔， 其中包括两个圆形的中心出声孔 7和四个长 条形的边缘出声孔 8。当然， 也可以根据扬声器应用的需求将边缘出声孔设计 为圆形或者其他不规则形状。
可以看出， 除了设置在振膜球顶部的角部位置的四个音圈单元， 还有两 个音圈单元分别设置在该球顶部的一组对边上。 同样的道理， 如果有六个以 上的驱动单元， 相应的音圈单元可以分别均匀设置在矩形球顶部的一组或者 两组对边上。
在图 6所示的实施例二中， 分别设置在一组对边上的两个音圈单元与所 在边的另外两个角部位置的音圈单元处在同一直线上并且均匀排布， 以均衡 驱动单元对振膜的驱动力， 平衡驱动振膜上下运动。 也可以将其设置为与所 在边的两个音圈单元不在同一直线上且不均匀排布， 以避免振膜的谐振。
在图 6所示的实施例二中， 用于平板式低音扬声器与电子装置固定结合 的固定孔 12设置在环形侧壁周边的延伸部上。
另外， 与实施例一不同的还有， 实施例二中所采用的 FPCB6为长条形， 中间部分贴合固定在振膜上贴合有音圈单元的一侧， 两端部分即未与振膜贴 合固定的部分通过边缘出声孔延伸至安装平面 9远离振膜的一侧。
图 7为根据本发明实施例二的 FPCB的结构示意图。
如图 7所示， 在 FPCB 的端部设置有电路 13， 与外部电路连接； FPCB 的中间部分设置有多个焊盘 11， 音圈单元通过音圈引线与设置在 FPCB固定 在振膜上的部分的焊盘 11电连接。 FPCB6的中间部分固定在振膜上结合音圈 单元的一侧， FPCB6未固定在振膜上的部分（即两端部分）能够通过外壳的 边缘出声孔延伸至安装平面远离振膜的一侧。 FPCB的两端部呈弧形结构弯折 至与安装平面平行的位置， 这种结构可以充分利用低音扬声器的内部空间， 并且避免了振膜振动过程中由于引线的牵拉造成的断线。
图 8为根据本发明实施例二的 FPCB在平板式低音扬声器的安装示意图。 如图 8所示， FPCB6中间部分安装在振膜上结合音圈单元的一侧， 音圈 单元通过音圈引线 14与设置在 FPCB6固定在振膜上的部分的焊盘 11电连接。 FPCB6两端部分通过出声孔延伸至安装平面远离振膜的一侧。 FPCB6的两端 部呈弧形结构弯折至与安装平面平行的位置。
FPCB6的正反两面均设置有焊盘 11，并且设置在 FPCB6正反两面的焊盘 分别一一对应； 其中， 设置在 FPCB6正面的焊盘分别与每一个音圈单元电连 接， 通过设置在 FPCB6反面的焊盘 11控制音圈单元之间的串并联关系。
下面将对实施例二所示的六个音圈单元的电连接方式做示例性介绍。 图 9-1和图 9-2分别示出了根据本发明实施例的六个音圈连接示意图。如 图 9-1所示，六个音圈连接方式为：分别将位于同一直线边上的三个音圈单元 串联为两个支路， 然后将两条支路并联。 如图 9-2所示， 六个音圈连接： 分别 将位于同一直线边角部的两音圈与对边中间的音圈串联为两个支路， 然后将 两条支路并联。
根据图 9-2所示的音圈单元连接方式，如果一条支路上的一个或多个驱动 单元出现问题， 平板式低音扬声器也能够正常工作， 因为还有另外一条支路 均匀分布在振膜球顶部的区域， 使振膜受力均匀。 同时， 由于 FPCB的两端 比较细， 而且有一定弧度的弯折， 因此可将振膜振动时 FPCB对振膜的阻力 降到最低， 并且使振膜能够受力均匀。 通过上述实施方式可以看出， 本发明提供的平板式低音扬声器， 采用至 少四个驱动单元设置在振膜的球顶部的四个角部， 另外在长轴上还可以设置 两个甚至多个驱动单元， 这种结构不仅有利于驱动单元的音圈与振膜稳定的 结合， 采用小尺寸的音圈单元和磁路单元驱动大尺寸的低音扬声器的振膜， 能够减少低音扬声器的厚度， 还能够节省磁铁的尺寸降低成本， 提高低音扬 声器的灵敏度。
另外， 在本发明的一个优选实施方式中， 长轴边上同侧的驱动单元采用 不在同一直线上并且间距比不为整数比的排布， 且对边上位于中间位置的两 驱动单元之间的间距小于角部两驱动单元之间的间距， 这种排布结构作用于 振膜， 可以避免由于振膜的谐振造成的缺陷； 同时驱动力均匀， 可以平衡的 驱动振膜， 能作用于功率更大的电子装置。 另外， 本发明采用 FPCB连接音 圈和外电路， 能够节省空间， 而且与振膜结合的音圈的引线直接在与 FPCB 的焊盘焊接， 可以避免由于振膜的振动造成的音圈引线的断线。 如上参照附图以示例的方式描述了根据本发明提出的平板式低音扬声 器。 但是， 本领域技术人员应当理解， 对于上述本发明所提出的平板式低音 扬声器， 还可以在不脱离本发明内容的基础上做出各种改进。 因此， 本发明 的保护范围应当由所附的权利要求书的内容确定。

Claims

权 利 要 求 书
1、 一种平板式低音扬声器， 包括振膜、 至少四个相互独立的驱动单元以 及收容固定所述振膜和所述驱动单元的外壳； 其中，
所述驱动单元包括独立的音圈单元和与所述音圈单元相对应的磁路单 元， 所述音圈单元分别贴合固定在所述振膜上；
并且， 所述平板式低音扬声器还包括连通所述扬声器的内部电路和外部 电路的 FPCB, 所述 FPCB设置在所述外壳的两侧， 其中， 所述 FPCB设置在 所述外壳靠近所述音圈单元的一侧的部分与所述音圈单元通过音圈引线电连 接， 设置在所述外壳远离所述音圈单元的一侧的部分与所述扬声器的外部电 路电连接。
2、 如权利要求 1所述的平板式低音扬声器， 其中，
所述振膜为矩形结构， 包括位于中心位置的刚性的球顶部和位于边缘位 置的折环部；
在所述球顶部的四个角部分别贴合有一个音圈单元；
所述折环部的边缘与所述外壳的上侧面固定结合。
3、 如权利要求 1所述的平板式低音扬声器， 其中，
所述外壳包括安装平面和所述安装平面周围的环形侧壁， 在所述安装平 面上设置有收容固定所述磁路单元的安装孔和贯通所述安装平面的出声孔； 所述出声孔包括设置在所述安装平面中心位置的中心出声孔以及设置在 所述环形侧壁和所述安装孔之间的边缘出声孔；
所述 FPCB通过所述出声孔使所述安装平面两侧的结构相连接。
4、 如权利要求 3所述的平板式低音扬声器， 其中，
所述 FPCB夹持固定在所述中心出声孔边缘的所述安装平面上， 所述 FPCB的一部分处于所述安装平面靠近所述振膜的一侧，另一部分处于所述安 装平面远离所述振膜的一侧。
5、 如权利要求 4所述的平板式低音扬声器， 其中，
所述 FPCB包括相互独立的两部分， 每部分与邻近的两个音圈单元电连
6、 如权利要求 3中任一项所述的平板式低音扬声器， 其中，
所述 FPCB部分贴合固定在所述振膜上贴合所述音圈单元的一侧， 所述 FPCB未与所述振膜贴合固定的部分通过所述出声孔延伸至所述安装平面远 离所述振膜的一侧。
7、 如权利要求 6所述的平板式低音扬声器， 其中，
所述 FPCB为长条形；
所述 FPCB的中部贴合固定在所述振膜上， 两端部通过所述边缘出声孔 延伸至所述安装平面远离所述振膜的一侧。
8、 如权利要求 7所述的平板式低音扬声器， 其中，
所述 FPCB的两端部呈弧形结构弯折至与所述安装平面平行的位置。
9、 如权利要求 1〜8中任一项所述的平板式低音扬声器， 其中， 所述 FPCB的正反两面均设置有焊盘，设置在所述 FPCB正反两面的焊盘 分别一一对应； 其中，
设置在所述 FPCB正面的焊盘分别与每一个音圈单元电连接， 并且， 通 过设置在所述 FPCB反面的焊盘控制所述音圈单元之间的串并联关系。
10、 如权利要求 1〜8中任一项所述的平板式低音扬声器， 其中， 所述 FPCB采用聚酰亚胺覆铜板基材。
PCT/CN2013/076560 2013-05-08 2013-05-31 平板式低音扬声器 WO2014180016A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/889,103 US9648424B2 (en) 2013-05-08 2013-05-31 Tablet woofer
KR1020157034780A KR101707085B1 (ko) 2013-05-08 2013-05-31 평판형 저음 스피커

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201310167574.3A CN103260118B (zh) 2013-05-08 2013-05-08 平板式低音扬声器
CN201310166950.7A CN103260116B (zh) 2013-05-08 2013-05-08 平板式低音扬声器
CN201310166950.7 2013-05-08
CN201310167574.3 2013-05-08

Publications (1)

Publication Number Publication Date
WO2014180016A1 true WO2014180016A1 (zh) 2014-11-13

Family

ID=51866670

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/076560 WO2014180016A1 (zh) 2013-05-08 2013-05-31 平板式低音扬声器

Country Status (3)

Country Link
US (1) US9648424B2 (zh)
KR (1) KR101707085B1 (zh)
WO (1) WO2014180016A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112616116A (zh) * 2020-12-31 2021-04-06 苏州东立电子有限公司 一种超线性喇叭工艺

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103347234B (zh) * 2013-05-29 2016-10-05 歌尔声学股份有限公司 低音扬声器及其后声腔形成方法
US9660596B2 (en) * 2015-01-23 2017-05-23 Tectonic Audio Labs Audio transducer stabilization system and method
NL2017514B1 (en) * 2016-09-22 2018-03-29 Univ Delft Tech Loudspeaker unit with multiple drive units
CN108616795B (zh) * 2018-05-10 2023-12-22 惠州迪芬尼声学科技股份有限公司 一种包括主动制冷的扬声器的音箱
WO2020182321A1 (en) * 2019-03-13 2020-09-17 Mayht Holding B.V. Membrane unit for speaker device
CN212486779U (zh) * 2020-06-30 2021-02-05 瑞声科技(新加坡)有限公司 一种扬声器
CN117082418B (zh) * 2023-10-16 2024-02-20 瑞声光电科技(常州)有限公司 发声器件

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102379130A (zh) * 2009-09-15 2012-03-14 宝星电子株式会社 音圈及利用该音圈的表面安装式微型扬声器
CN102640520A (zh) * 2009-11-30 2012-08-15 易音特电子株式会社 音响转换装置用振动板

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525285A (en) * 1978-08-14 1980-02-22 Sony Corp Speaker
US4899390A (en) * 1986-09-19 1990-02-06 Matsushita Electric Industrial Co., Ltd. Thin speaker having an enclosure within an open portion and a closed portion
DE19825866A1 (de) * 1998-06-10 1999-12-16 Nokia Deutschland Gmbh Plattenlautsprecher
TWI282759B (en) * 2002-11-19 2007-06-21 Ube Industries Electro-conductive metal plated polyimide substrate
US7548766B2 (en) * 2003-04-25 2009-06-16 Sanyo Electric Co., Ltd. Flat type speaker unit, and electronic appliance having this unit
JP4420104B2 (ja) * 2007-11-02 2010-02-24 オンキヨー株式会社 磁気回路モジュール、スピーカー用磁気回路およびその製造方法、ならびに、これを用いたスピーカー
CN101860783B (zh) * 2009-10-13 2013-10-30 东莞凡振工业电子有限公司 一种薄型扬声器
US9277323B2 (en) * 2014-03-25 2016-03-01 Apple Inc. Compact audio speaker

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102379130A (zh) * 2009-09-15 2012-03-14 宝星电子株式会社 音圈及利用该音圈的表面安装式微型扬声器
CN102640520A (zh) * 2009-11-30 2012-08-15 易音特电子株式会社 音响转换装置用振动板

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112616116A (zh) * 2020-12-31 2021-04-06 苏州东立电子有限公司 一种超线性喇叭工艺

Also Published As

Publication number Publication date
KR101707085B1 (ko) 2017-02-15
US9648424B2 (en) 2017-05-09
US20160073201A1 (en) 2016-03-10
KR20160005119A (ko) 2016-01-13

Similar Documents

Publication Publication Date Title
WO2014180016A1 (zh) 平板式低音扬声器
US10440478B2 (en) Tablet woofer and electronic device using same
US9788121B2 (en) Flat plate-type bass loudspeaker
CN103269471A (zh) 一种平板式低音扬声器及应用该低音扬声器的电子装置
WO2020181887A1 (zh) 扬声器
CN107249163B (zh) 一种发声装置
US10979823B2 (en) Sound generator
CN103260118B (zh) 平板式低音扬声器
US20180027335A1 (en) Miniature Sounding Device
WO2020134345A1 (zh) 发声器件
CN103281657B (zh) 平板式低音扬声器
CN103260116A (zh) 平板式低音扬声器
CN203279158U (zh) 平板式低音扬声器
CN203368736U (zh) 平板式低音扬声器
CN212183743U (zh) 一种扬声器
CN203368735U (zh) 一种平板式低音扬声器及应用该低音扬声器的电子装置
KR101142255B1 (ko) 장방형 박막 스피커
CN202496061U (zh) 微型动圈式电声转换器
CN201869358U (zh) 动圈式电声转换器
CN103281656B (zh) 平板式低音扬声器
CN103297903B (zh) 平板式低音扬声器及应用该低音扬声器的电子装置
CN203368738U (zh) 平板式低音扬声器
CN203368737U (zh) 平板式低音扬声器
CN203279157U (zh) 平板式低音扬声器及应用该低音扬声器的电子装置
US11064286B1 (en) Vibrator apparatus and electronic device having the same

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13884105

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 14889103

Country of ref document: US

ENP Entry into the national phase

Ref document number: 20157034780

Country of ref document: KR

Kind code of ref document: A

122 Ep: pct application non-entry in european phase

Ref document number: 13884105

Country of ref document: EP

Kind code of ref document: A1