WO2011105844A2 - Diaphragme plat et haut-parleur plan l'utilisant - Google Patents

Diaphragme plat et haut-parleur plan l'utilisant Download PDF

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Publication number
WO2011105844A2
WO2011105844A2 PCT/KR2011/001319 KR2011001319W WO2011105844A2 WO 2011105844 A2 WO2011105844 A2 WO 2011105844A2 KR 2011001319 W KR2011001319 W KR 2011001319W WO 2011105844 A2 WO2011105844 A2 WO 2011105844A2
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WIPO (PCT)
Prior art keywords
flat plate
metal foil
diaphragm
flat
edge
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PCT/KR2011/001319
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English (en)
Korean (ko)
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WO2011105844A3 (fr
Inventor
서동현
박경학
오규석
Original Assignee
부전전자 주식회사
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Application filed by 부전전자 주식회사 filed Critical 부전전자 주식회사
Publication of WO2011105844A2 publication Critical patent/WO2011105844A2/fr
Publication of WO2011105844A3 publication Critical patent/WO2011105844A3/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
    • 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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details

Definitions

  • the present invention relates to a flat plate diaphragm and a flat speaker using the same, and more particularly, a plate-shaped base plate made of an epoxy resin containing glass fiber, and a circuit pattern pressed on the bottom surface of the base plate to electrically connect the voice coil.
  • a plurality of conductive suspensions which are electrically connected to the formed metal foil, the annular edge portion provided at the edge of the base plate, and the circuit pattern of the metal foil to transmit an electrical signal and suppress excessive vibration of the base plate. It relates to a flat plate diaphragm and a flat speaker using the same.
  • the speaker generates sound by vibrating the diaphragm by the movement of the voice coil when current flows through the voice coil in the magnetic field using the magnet.
  • the speaker is composed of magnetic circuits such as magnets, yokes and plates, and vibration systems and frames such as diaphragms and voice coils.
  • a cone-shaped diaphragm and a dome-shaped diaphragm are mainly used.
  • these cone-shaped and domed diaphragms have limitations in reducing the thickness of the speaker due to their structural characteristics.
  • a thin flat speaker uses a flat plate diaphragm.
  • the flat vibrating plate flat diaphragm
  • the flat vibrating plate has the advantage of minimizing the thickness of the speaker with its morphological characteristics, and increases the stiffness of the diaphragm to drive even the parts that do not vibrate at high frequencies, thereby widening the piston range. There are features that can be.
  • FIG. 15 is a schematic cross-sectional view showing an example of a flat speaker.
  • the conventional flat speaker 100, the frame 120 of a predetermined form is formed, the yoke 130, the magnet 140, and the upper plate 150 are installed in the center of the frame 120 in order do.
  • the bobbin 164 wound around the voice coil 160 is located in the gap between the yoke 130 and the magnet 140 and the upper plate 150, the upper end of the bobbin 164 is a flat plate diaphragm for emitting sound waves ( The lower surface of 170) is bonded.
  • an edge portion 250 having a predetermined elasticity is installed at an edge of the plate diaphragm 170, and an edge of the edge portion 250 is fixed to the frame 130.
  • the voice coil 160 adhered to the bottom surface of the plate diaphragm 170 is connected to the connection terminal of the frame 110 through the lead wire 160a.
  • the voice coil 160 when an electrical signal of an audible frequency is applied to the voice coil 160 through the lead wire 160a, the electric force generated by the voice coil 160 changes and the magnetic force emitted from the magnet 150 interacts with the diaphragm ( 170 vibrates up and down to reproduce sound. At this time, the edge portion 250 installed on the edge of the diaphragm 170 allows the diaphragm 170 to vibrate smoothly.
  • the flat speaker 100 Since the flat speaker 100 has a structure in which a diaphragm vibrates pistons as a whole to radiate sound waves, the flat diaphragm 170 must be made of a relatively strong and hard material so that partial bending or twisting does not occur.
  • the flat speaker used in the flat panel display device is not only larger in size than a flat speaker used in a mobile phone, PDA, etc., but also requires high power, so that the amount of winding of the voice coil is increased or multiple voice coils are used. Will be attached to the Therefore, the diaphragm becomes heavy, the load applied to the diaphragm increases, and the diaphragm may be easily deformed or damaged because it is affected by the high heat generated from the voice coil. Accordingly, high power flat speakers require a flat plate diaphragm made of a heat-resistant rigid material that can support the weight of a plurality of voice coils and can withstand the high heat generated by the voice coil.
  • the conventional flat plate diaphragm 170 is processed by using a synthetic resin such as polypropylene (PP) having excellent rigidity in the form of a flat plate, but since the diaphragm made of such a synthetic resin is too heavy, the vibration system and the magnetic circuit are increased and power consumption is increased. There was a problem that the heat resistance to withstand high heat is inferior.
  • PP polypropylene
  • FIG. 16 shows a flat plate diaphragm using honeycomb.
  • the flat plate diaphragm 270 using honeycomb has a honeycomb as a core 272 material and a carbon UDPP (unidirectional pre-preg) as a skin 274 material.
  • the composite material is intended to have high rigidity and high elasticity.
  • honeycomb is a material made through a complicated process, so it was difficult to freely adjust its thickness, weight, or rigidity according to the type or size of the speaker.
  • the conventional flat speaker 100 shown in FIG. 15 draws the lead wire 160a of the voice coil 160 to the outside of the frame 120 and connects it to the connection terminal, so that the lead wire 160a is vibrated when the diaphragm vibrates. ) Does not coincide with the vibration of the diaphragm, the lead wire (160a) is easily broken.
  • the flat plate diaphragm 170 has a problem in that the up and down vibration of the diaphragm excessively occurs in the low range so that a collision sound or an abnormal sound occurs or a single vibration occurs.
  • the present invention has been made to solve such a problem according to the prior art, and a main object of the present invention is to provide a flat plate diaphragm made of a material having high rigidity and high elasticity and reducing weight and having excellent heat resistance.
  • the present invention is to provide a flat plate diaphragm made of a new material that can relatively easily adjust the thickness, weight and rigidity of the diaphragm according to the type or size of the speaker.
  • the present invention is a metal foil formed with a circuit pattern integrally formed to supply an electrical signal to one or a plurality of voice coils, the vibration damping force for transmitting an external electrical signal to the metal foil and suppress the vibration of the vibration plate in a certain range It is to provide a flat plate diaphragm provided with a plurality of conductive suspensions.
  • the present invention provides a flat plate diaphragm capable of reducing the weight of the diaphragm relatively freely by forming a plurality of concave grooves or through holes in the surface of the diaphragm.
  • the present invention is to provide a flat plate diaphragm made by pressing a film for closing a plurality of through holes formed to reduce the weight of the diaphragm.
  • the present invention provides a flat diaphragm including a flat diaphragm.
  • a flat plate diaphragm comprising a flat plate portion having a predetermined size and an annular edge portion provided along an edge of the flat plate portion
  • the flat plate portion is made of an epoxy resin containing a glass fiber; A metal foil attached to the base plate to form a circuit pattern; It comprises an insulating protective layer to protect the metal foil.
  • a plurality of conductive suspensions connected to the circuit pattern of the metal foil are further provided.
  • the metal foil is provided with a circuit pattern for supplying an electrical signal to one or a plurality of voice coils.
  • the circuit pattern of the metal foil is composed of a plurality of lead wire connecting portions for connecting the lead wires of the voice coil, a suspension connecting portion for connecting the plurality of conductive suspensions, and a pattern portion for connecting the plurality of voice coils in series or in parallel.
  • the lead wire connecting portion is formed on a lower surface of the flat plate portion, and the suspension connecting portion is formed to protrude from an edge of the flat plate portion.
  • the conductive suspension is a narrow and elongated tension piece extending from the flat plate portion, and includes a base plate made of an epoxy resin containing glass fiber and a metal foil attached to the base plate.
  • the conductive suspension is a narrow, elongated metal piece that is fixed to the flat plate portion.
  • a plurality of concave grooves are formed on the surface of the flat plate portion.
  • a plurality of through holes are formed in the flat plate, and a film for closing the through holes is pressed on the surface thereof.
  • the plurality of through holes may be formed through a base plate made of an epoxy resin including glass fiber and an insulating protective layer protecting the metal foil, but do not penetrate the circuit pattern of the metal foil.
  • the flat speaker according to the present invention includes a frame, a yoke, a magnet, and an upper plate, which are sequentially installed inside the frame, a voice coil installed in a gap between the yoke, the magnet, and the upper plate, and fixed to the frame.
  • a voice coil installed in a gap between the yoke, the magnet, and the upper plate, and fixed to the frame.
  • the bottom of the flat speaker comprising a flat plate diaphragm with the voice coil
  • the plate diaphragm may include a base plate made of an epoxy resin including glass fiber, a metal foil having a circuit pattern attached to the base plate and configured to transmit an external signal to the voice coil, and an insulating protective layer protecting the metal foil.
  • a flat plate portion formed; An edge portion provided in an annular shape along an edge of the flat plate portion, the edge portion of which is fixed to the step of the frame; And a plurality of conductive suspensions installed at regular intervals along the edges of the flat plate so as to be positioned below the edges, and electrically connected to the metal foil, and end portions of which are exposed to the terminal grooves of the frame. do.
  • another embodiment of the flat speaker according to the present invention is a flat speaker comprising a flat diaphragm, the flat diaphragm is attached to the base plate and the base plate can transmit an external signal to the voice coil.
  • a flat plate formed of a metal foil having a circuit pattern formed thereon, and an insulating protective layer protecting the metal foil; An edge portion provided in an annular shape along an edge of the flat plate portion, the edge portion of which is fixed to the step of the frame; And a plurality of conductive suspensions installed at regular intervals along the edges of the flat plate so as to be positioned below the edges, and electrically connected to the circuit patterns of the metal foil, and end portions of which are exposed to the terminal grooves of the frame.
  • a plurality of lead wire connecting portions for electrically connecting the lead wires of the plurality of voice coils to the circuit pattern of the metal foil, and for electrically connecting the plurality of conductive suspensions to the circuit patterns of the metal foil.
  • a plurality of suspension connection portion is characterized in that it is provided.
  • a flat speaker comprising a flat diaphragm, wherein the flat diaphragm is provided with a flat plate of a predetermined size and an annular shape along an edge of the flat plate, the end of which is An edge portion fixed to the step of the frame and a plurality of conductive suspensions are provided at regular intervals along the edge of the plate portion to be located below the edge portion, wherein the surface of the plate portion is formed with a plurality of concave grooves It features.
  • another embodiment of the flat speaker according to the present invention is a flat speaker comprising a flat diaphragm, wherein the flat diaphragm is provided with a flat plate of a predetermined size and annular along the edge of the flat plate and the end portion thereof.
  • the edge portion is fixed to the step of the frame and a plurality of conductive suspensions are provided at regular intervals along the edge of the flat plate portion to be located below the edge portion, the flat plate portion is formed with a plurality of through holes And a film for closing the through hole is pressed on the surface thereof.
  • the flat plate diaphragm according to the present invention is made of glass fiber impregnated with epoxy resin to increase rigidity and elasticity to obtain high power, and is lighter than the conventional synthetic resin diaphragm so that the thickness of the diaphragm can be sufficiently thick so that the piston vibrates. It is possible to attach voice coil directly without bobbin, and the manufacturing process is simpler than the conventional diaphragm made of honeycomb composite material, and the thickness of diaphragm can be adjusted relatively freely according to the type of speaker. There is an effect that can provide a flat speaker of the kind and size.
  • the flat plate diaphragm of the present invention by attaching a metal foil to the plate and forming a circuit pattern for connecting a plurality of voice coils in series or in parallel, a plurality of voice coils can be easily installed as well as the lead wires of the voice coils. By directly connecting the to the flat plate portion can prevent the lead wire is disconnected, there is an effect that can minimize the heat generated in the voice coil by connecting a plurality of voice coils in parallel.
  • the glass plate impregnated with the epoxy resin can be configured to provide a high strength and high elasticity of the flat plate portion, and the thickness of the flat plate portion can be freely adjusted by stacking a plurality of glass fiber fabrics. And, by pressing a metal foil of a predetermined thickness to the plate portion and there is an effect that can adjust the elasticity and weight of the diaphragm by removing a portion of the metal foil.
  • the flat plate diaphragm of the present invention by providing a conductive suspension having an elastic force and a buffer force at the edge of the flat plate portion to limit the vibration of the diaphragm within a certain range to prevent the impact sound or abnormal sounds, the external electrical signal to the metal foil of the flat plate By transmitting to the voice coil through the shorter the length of the lead wire and directly connected to the plate portion can prevent the lead wire is broken by the vibration of the diaphragm.
  • the plate portion by forming a plurality of concave grooves or a plurality of through holes in the plate portion to reduce the weight of the diaphragm while maintaining the thickness of the plate portion to enable the piston vibration, the plate portion By providing a film for closing the formed concave groove or the through hole formed in the flat plate portion, the concave groove formed on the surface thereof has the effect of increasing the surface area of the diaphragm in contact with the air, thereby enhancing the bass characteristics.
  • FIG. 1 is a schematic cross-sectional view showing an example of a flat speaker according to the present invention
  • FIG. 2 is a plan view of the flat speaker shown in FIG.
  • FIG. 3 is a plan view showing a flat plate diaphragm applied to the flat speaker of the present invention
  • FIG. 4 is a bottom view of the flat plate diaphragm according to the present invention shown in FIG.
  • FIG. 5 is an enlarged cross-sectional view showing the internal structure of the flat plate shown in FIG.
  • FIG. 6 is a cross-sectional view showing an embodiment of a flat plate diaphragm according to the present invention.
  • FIG. 7 is a cross-sectional view showing another embodiment of the flat plate according to the present invention.
  • FIG. 8 is a cross-sectional view showing another embodiment of the flat plate according to the present invention.
  • FIG. 9 is a plan view and a sectional view showing a flat plate portion in which a plurality of small circular through holes are formed and a plate film is compressed according to the present invention.
  • FIG. 10 is a plan view and a cross-sectional view showing a flat plate portion in which two large circular through holes are formed and a domed film is compressed according to the present invention
  • FIG. 11 is a plan view and a cross-sectional view showing a flat plate formed by pressing a dome-shaped film by removing a portion except for a circuit pattern and a portion in which two voice coils are formed by forming a plurality of large through holes according to the present invention
  • FIG. 12 is a plan view showing a flat plate integrally formed with a plurality of conductive suspension made of the same material as the flat plate according to the present invention
  • FIG. 13 is a plan view showing a flat plate provided with a plurality of conductive suspension made of a different material from the flat plate according to the present invention
  • FIG. 14 is a schematic cross-sectional view showing another embodiment of a flat speaker according to the present invention.
  • FIG. 15 is a cross-sectional view showing an example of a flat speaker according to the prior art
  • 16 is a cross-sectional view showing an example of a plate diaphragm according to the prior art.
  • FIG. 1 is a schematic cross-sectional view showing an example of a flat speaker according to the present invention
  • Figure 2 is a plan view of the flat speaker shown in Figure 1
  • Figure 3 is a plan view showing a flat plate diaphragm applied to the flat speaker of the present invention, In particular, the edge portion is removed
  • Figure 4 is a bottom view of the flat plate diaphragm according to the present invention shown in Figure 3
  • Figure 5 is an enlarged cross-sectional view showing the structure of the flat plate shown in FIG.
  • the flat speaker 1 includes a frame 2 of a predetermined shape, two yokes 3 installed on the frame 2, a magnet 4 and an upper plate 5,
  • two voice coils 6 installed in the gap between the yoke 3 and the magnet 4 and the upper plate 5 are fixed to edges of the step 2a of the frame 2, and the two are fixed on the bottom thereof.
  • Voice coils 6 are fixed and configured to include a flat plate diaphragm 7 vibrating up and down.
  • the flat plate diaphragm 7 is provided to be spaced apart from the flat plate portion 11 of the predetermined size, the edge portion 15 provided along the edge of the flat plate portion 11 and the lower portion of the edge portion 15. It consists of a plurality of conductive suspensions 17.
  • the flat plate part 11 is a flat plate positioned at the center of the flat plate diaphragm 7, and when the flat plate vibrating plate 7 vibrates up and down, the plate plate 11 vibrates as a whole to radiate sound waves.
  • the part to play. Therefore, the plate portion 11 is made of a rigid material of a certain thickness to enable the piston vibration.
  • the edge portion 15 is made of a soft material to serve to fix the plate portion 11 to the frame 2 and to smoothly vibrate the plate portion 11.
  • the conductive suspension 17 is made of an elastic material so as to be provided between the flat plate portion 11 and the frame 2 to suppress excessive vibration of the flat plate portion 11.
  • the conductive suspension 17 is made of a conductive metal or include a metal foil so as to transfer an external electrical signal to the metal foil of the flat plate portion 11.
  • the flat plate portion 11 includes a base plate 21 having a predetermined thickness, a metal foil 23 attached to a bottom surface of the base plate 21, and a bottom surface of the metal foil 23. It consists of the insulating protective layer 25 apply
  • the base plate 21 is a plate body made of an epoxy resin (E) containing glass fiber (G).
  • the base plate 21 provides sufficient rigidity and elasticity so that the flat plate portion 11 vibrates with a piston.
  • the thickness of the base plate 21 increases in proportion to its area, and is made of a thickness of at least 0.1 mm to perform the piston vibration.
  • the metal foil 23 is pressed onto the bottom surface of the base plate 21, and a predetermined circuit pattern is formed to transmit an electrical signal to one or more voice coils 6.
  • the metal foil 23 may have a circuit pattern for connecting a plurality of voice coils 6 in series or in parallel.
  • the insulating protective layer 25 is formed by applying an insulating material to a bottom of the metal foil 23 to a predetermined thickness.
  • the insulating protective layer 25 prevents oxidation and damage of the metal foil 23 and blocks the voice coil 6 from being connected to the metal foil 23.
  • the insulation protection layer 25 includes a plurality of lead wire connection portions 25a for connecting the lead wire 6a of the voice coil 6 to the metal foil 23, and a plurality of conductive suspensions 17 for the metal foil ( A plurality of suspension connecting portions 25b for electrically connecting to 23 are provided.
  • the lead wire connection part 25a and the suspension connection part 25b are portions in which the metal foil 23 is exposed to the outside since the insulating protective layer 25 is not formed.
  • the edge portion 15 is provided between the edge upper surface of the flat plate portion 11 and the frame 2.
  • the edge portion 15 is made of any one material selected from the group consisting of a polymer film, pulp, a rubber material and an elastomer, a woven fabric, and a nonwoven fabric which are softer and lighter than the flat plate portion 11.
  • the edge portion 15 has an inner planar portion 15a adhered to the upper surface of the flat plate portion 11, a dome portion 15b that is bent upwardly and has a dome shape, and a stepped portion 2a of the frame 2. It consists of the outer planar part 15c supported.
  • the edge portion 15 is formed in an annular shape along the edge of the plate portion 11 to fix the plate portion 11 to the frame 2 so that the plate portion 11 smoothly vibrates the piston. do.
  • the edge portion 15 plays two roles. One is to flexibly respond to the movement of the flat plate portion 11 and to prevent the lateral shaking, and to maintain the position accurately. The other is the sound wave radiated forward from the flat plate portion 11 and the reverse phase radiated backward. This is to prevent the sound waves of the mixture is canceled. Therefore, the edge portion 15 is made of a soft material compared to the flat plate portion 11 to satisfy the mechanical linearity of the vibration direction.
  • the conductive suspension 17 is provided between the lower surface of the edge of the flat plate 11 and the frame 2.
  • the plurality of conductive suspensions 17 are spaced apart at regular intervals along the edge of the flat plate 11, but are arranged in a symmetrical structure so that the flat plate 11 does not oscillate.
  • the conductive suspension 17 supports the flat plate portion 11 and suppresses excessive vibration of the flat plate portion 11.
  • the conductive suspension 17 has a narrow and elongated shape and may be bent in a predetermined shape to have an elastic force.
  • the conductive suspension 17 is made of a synthetic resin attached to a conductive metal or metal foil so as to perform a function of transmitting an external electrical signal to the metal foil 23 of the flat plate portion 11.
  • the conductive suspension 17 may be made of the same material as the flat plate portion 11.
  • the inner end portion of the conductive suspension 17 is mechanically fixed to the protrusion 19 formed to protrude outward from the edge of the flat plate portion 11 and electrically connected to the metal foil 23 of the flat plate portion 11. do.
  • the conductive suspension 17 is fixed to the protrusion 19 by adhesive or welding.
  • the outer end of the conductive suspension 17 is located in the terminal groove 2b of the frame 2 and exposed to the outside.
  • a signal line (cable), not shown, is connected to an end of the exposed conductive suspension 17.
  • the electrical signal is transmitted to the voice coil 6 through the conductive suspension 17, the metal foil 23 of the flat plate 11, and the lead wire 6a.
  • the electric force changes according to the strength or frequency of the applied electric signal, and the attraction force and the repulsive force are applied to the voice coil 6 by the interaction between the electric force and the magnetic force emitted from the magnet 4. Will occur. And the attraction and repulsive force to vibrate up and down the flat plate 11 to which the voice coil 6 is attached to emit a predetermined sound.
  • the edge portion 15 allows the plate portion 11 to vibrate smoothly in the air, and the conductive suspension 17 suppresses unilateral vibration or excessive vibration of the plate portion 11 so that a collision sound or an abnormal sound is generated. This can be prevented from occurring so that high quality sound can be reproduced.
  • the flat speaker 1 which concerns on this invention reproduces a sound by making a piston vibrate the flat part 11 provided in the center of the flat vibration plate 7.
  • the flat plate portion 11 should be made of a rigid material of a predetermined thickness so that partial bending or split vibration does not occur.
  • the weight increases, thereby preventing the vibration of the flat plate portion 11 from following an electric signal applied thereto. Accordingly, the flat plate portion 11 should minimize its weight so as to properly react to the electrical signal while maintaining the appropriate strength and thickness.
  • the present invention constitutes the flat plate portion 11 with a high elastic modulus and a light material. That is, this invention makes the base board 21 which comprises the flat plate part 11 from the epoxy resin (E) containing glass fiber (G).
  • the epoxy resin (E) containing glass fiber (G) In general, glass fabrics are light but have good heat resistance, chemical resistance, insulation properties, and particularly have high tensile strength. And epoxy resin (epoxy) shows excellent adhesion, high strength, heat resistance, chemical resistance. Therefore, the flat plate portion 11 made of glass fiber impregnated with epoxy resin is excellent in strength and lightness and also excellent in heat resistance.
  • the flat plate portion made of glass fiber and epoxy resin can be suitably applied to the high power flat panel speaker of the present invention because it is not damaged even at high heat of 150 ° C. or higher.
  • the base plate 21 constituting the flat plate portion 11 of the present invention is formed by stacking a plurality of pre-pregs made of glass fiber and epoxy resin. That is, the base plate 21 of the present invention is impregnated with an epoxy resin diluted with an organic solvent in a glass fiber fabric, and then volatilizing the organic solvent in a drying furnace to cure the epoxy resin of the thermosetting resin to a semi-cured state (B stage state) Prepregs are made and then compressed or pre-stacked and pre-rolled. As described above, since the present invention stacks a plurality of prepregs to form a flat plate having a predetermined thickness, the thickness can be freely adjusted as necessary.
  • the base plate 21 is formed by alternately stacking glass fibers impregnated with an epoxy resin in directions of 0 ° and 90 °, or epoxy to a glass fiber fabric woven by sinking and floating the weft and the incline up and down. It is made by impregnating resin.
  • the diameter of the glass fiber is preferably 3.0 ⁇ m or more and 7.0 ⁇ m or less. If the diameter of the glass fiber is too thin, the strength is weak, if the diameter of the glass fiber is too large, there is a problem that the structure of the glass fiber fabric is not dense and protrudes at the intersection of the weft and the slope.
  • the glass fiber may be a glass fiber twisted 0 to 1.0 times per inch.
  • the thickness of a glass fiber cloth is 10 micrometers or more and 400 micrometers or less.
  • the thickness of the glass fiber fabric is less than 10 ⁇ m it is difficult to manufacture a glass fiber fabric, when the thickness of the glass fiber fabric is thicker than 400 ⁇ m because the gap between the adjacent glass fibers are narrow, arranged inclined and weft alternately up and down It is difficult to do, and it is difficult to manufacture a fiberglass fabric.
  • the epoxy resin is a substance having an epoxy bond, and is made by polymerizing epichlorohydrin and bisphenol A.
  • Epoxy resins are not used alone, but are used by adding a curing agent to a thermosetting material. Therefore, epoxy resin can be easily made into a thermosetting material even at room temperature by using a suitable curing agent. That is, the epoxy resin is hardened only when the curing agent is mixed, so the storage stability is high and long-term storage is possible regardless of climate and temperature.
  • epoxy resins have very small reaction shrinkage in curing and do not generate volatile substances.
  • the epoxy resin has very good electrical properties, excellent mechanical properties, and very good dimensional stability.
  • the present invention preferably uses an epoxy resin, but in addition to the epoxy, a thermosetting resin may be used as the unsaturated polyester resin, the polyimide resin, the BT resin, the cyanate resin, and the like.
  • the said epoxy adhesion amount is set so that the quantity of the varnish containing an epoxy and a hardening
  • the metal foil 23 is crimped
  • the metal foil 23 reinforces the rigidity and elasticity of the base plate 21.
  • the metal foil 23 has a thickness of 3 ⁇ m to 100 ⁇ m. If the thickness of the metal foil 23 is too thick, the weight of the flat plate portion 11 is increased. Therefore, the thickness of the metal foil 23 should be selected in an appropriate range in consideration of the width of the flat plate portion (11).
  • the metal foil 23 may be made by curing the prepreg and attaching it with an adhesive, or by heating, pressing and curing the metal foil 23 on one surface of the base plate 21 on which one or more prepregs are laminated. Can be. In addition, a method of simultaneously applying varnish containing epoxy to the glass fiber fabric and the metal foil 23 is also possible.
  • the metal foil 23 mainly uses copper foil, but aluminum foil may also be used.
  • a predetermined circuit pattern is formed on the metal foil 23 pressed onto the bottom surface of the base plate 21.
  • the circuit pattern of the metal foil 23 may be generally formed by photolithography and etching. That is, by using the temporary mask, the metal foil 23 of the undesired portion of the base plate 21 can be removed to leave only the required metal foil.
  • the circuit pattern of the metal foil 23 is configured to electrically connect the plurality of voice coils 6. That is, the circuit pattern of the metal foil 23 is formed with a pattern portion 23c for connecting a plurality of voice coils 6 in series or in parallel.
  • an insulating protective layer 25 having a predetermined thickness is formed on the bottom of the metal foil 23.
  • the insulating protective layer 25 is formed by applying an insulating resin, such as silicone resin, Teflon, fluorine resin, PE to a predetermined thickness.
  • the insulating protective layer 25 is made of a silk screen.
  • the insulation protection layer 25 includes a plurality of lead connection portions 25a for connecting the lead wires 6a of the voice coil 6 and a plurality of suspension connection portions 25b for connecting the plurality of conductive suspensions 17. do.
  • the lead wire connecting portion 25a and the suspension connecting portion 25b are formed so that an insulating resin is not applied during screen printing. In this case, the suspension connecting portion 25b is formed in the protrusion 19 for smooth vibration of the flat portion 11.
  • the flat plate portion 11 made of glass fiber and epoxy resin has high strength, high elasticity and heat resistance, and is light, so that it can respond appropriately to high frequency signals.
  • a flat diaphragm 7 made of such a material if its size increases, the weight and thickness of the diaphragm increase in order to increase the strength. Therefore, there is a limit in reducing the weight while maintaining the strength of the diaphragm only by changing the material of the flat plate portion 11. Accordingly, another aspect of the present invention will be described a method of reducing the weight while maintaining the rigidity and thickness of the flat plate portion (11).
  • One way to reduce the weight of the flat plate portion 11 is to form a plurality of concave grooves on the flat plate portion 11 surface.
  • Another method of reducing the weight of the flat plate portion 11 is to form through holes 40 of various sizes and shapes in the flat plate portion 11. The film 45 is pressed onto the surface of the flat plate 11 to prevent air from escaping through the through hole 40.
  • Figure 6 is a cross-sectional view showing an embodiment of a flat plate diaphragm formed with a plurality of concave grooves on the upper surface of the flat plate according to the present invention
  • Figure 7 is another of the flat plate diaphragm formed with a plurality of through holes in the flat plate according to the present invention
  • 8 is a cross-sectional view showing an embodiment of a flat plate diaphragm in which a plurality of through holes are formed in a flat plate portion and a film is pressed on a surface thereof to form a plurality of concave grooves according to the present invention. .
  • a plurality of concave grooves 30 are formed on the surface of the plate portion 11. These concave grooves 30 serve to reduce the weight of the flat plate portion 11 by removing a portion of the flat plate portion 11.
  • the concave groove 30 may be formed to a predetermined depth on the surface of the flat plate portion 11 using a drill.
  • the concave grooves 30 formed on the surface of the flat plate portion 11 may reduce the weight of the flat plate portion 11 and improve the bass characteristics by expanding the surface area in contact with air.
  • a plurality of through holes 40 are formed in the plate portion 11.
  • the through hole 40 serves to reduce the weight of the flat plate portion 11 by removing a portion of the flat plate portion 11.
  • the through hole 40 may be formed using a drill or a punching machine.
  • the film 45 is attached to the upper surface of the flat plate portion 11 to block air from escaping through the through hole 40 when the flat plate portion 11 vibrates.
  • the film 45 is made of a film having excellent heat resistance and strength, such as a polyethylene terephthalate film, a polypropylene film, a polyethylene film, a polyfluoroethylene film, and the like.
  • FIG. 8 shows another method of forming a plurality of concave grooves 30 in the surface of the flat plate portion 11. That is, as shown in the drawing, a plurality of through holes 40 penetrating through the flat plate portion 11 are formed, and then the film 45 closing the through holes 40 is disposed on the surface of the flat plate portion 11. It may be compressed to form a plurality of concave grooves 30. At this time, the film 45 is inserted into the through hole 40 to form a concave groove 30 having a predetermined depth.
  • the size and shape of the concave groove 30 depends on the size and shape of the through hole 40 and the degree to which the film 45 is inserted into the through hole 4.
  • the plurality of concave grooves 30 formed in the flat plate portion 11 serves to increase the low pass characteristic by widening the surface contact area between the diaphragm and the air.
  • the film 45 attached to the flat plate portion 11 serves to increase the internal loss of the flat plate portion (11).
  • the modulus of elasticity and internal loss have opposite properties. Therefore, if the internal loss is high, the elastic modulus is difficult to make an ideal diaphragm. On the contrary, if the elastic modulus is high, the internal loss is relatively low.
  • the plate portion 11 according to the present invention has a high elastic modulus and low internal loss. Therefore, the film 45 installed across the through hole 40 may serve to increase internal loss since the film 45 is made of a thinner and softer material than the flat plate 11.
  • the film 45 may further increase internal loss by forming a flexible material such as silicone, synthetic resin, or rubber material. As such, the present invention can increase the internal loss of the flat plate portion 11 by changing the material of the film 45 and the size of the through hole 40.
  • the plurality of concave grooves 30 or through holes 40 formed in the flat plate portion 11 also serves to remove or alleviate the orientation or irregularity of the glass fiber fabric included in the base plate 21.
  • the glass fiber fabric constituting the base plate 21 has a structure in which the weft and the warp are overlapped, and thus may have a unique direction or irregularity according to the arrangement of the points where the weft and the warp overlap.
  • the directionality and irregularity show differences in bending stiffness and elastic modulus of the flat plate portion 11, causing split vibration. Therefore, by forming the concave groove 30 in consideration of the arrangement of the glass fiber fabric it can remove the orientation of the glass fiber fabric.
  • the concave groove 30 may be arranged in an irregular or simple lattice form, but may be arranged to have a specific shape such as concentric circles.
  • FIG. 9 shows an example of a flat plate portion 11 having a plurality of small circular through holes 40a according to the present invention.
  • the plurality of small circular through holes 40a are evenly formed except for the portion where the voice coil 6 is installed and the portion where the circuit pattern of the metal foil 25 is formed.
  • the plate-shaped film 45a is crimped on the upper surface of the flat plate portion 11.
  • a plurality of concave grooves 30 are formed on the surface of the flat plate 11 according to the degree of compressing the plate-like film 45a.
  • the 10 shows an example of the flat plate portion 11 formed with two large circular through holes 40b according to the present invention.
  • the two large circular through holes 40b are formed inside the portion where the voice coil 6 is installed.
  • the dome-shaped film 45b is crimped on the upper surface of the flat plate part 11.
  • the domed film 45b has a structure in which a center portion protrudes upward, and the center portion is not bonded to the flat plate portion 11, and only an edge portion thereof is adhered to the top surface of the flat plate portion 11.
  • FIG. 12 shows a flat plate diaphragm in which a plurality of conductive suspensions 17 made of the same material as the flat plate 11 are integrally formed
  • FIG. 13 shows a plurality of conductive suspensions made of a different material from the flat plate 11. 17) shows the plate diaphragm to which it is fixed.
  • the four conductive suspensions 17 are formed in the flat plate portion 11, and two conductive suspensions 17 of which are two different conductive suspensions on one side of the flat plate portion 11. 17 is formed to be located on the other side of the flat plate portion 11.
  • the two conductive suspensions 17 installed on both sides of the flat plate 11 are symmetrical.
  • the four conductive suspensions 17 include a base plate having a predetermined thickness and the metal foil attached to the bottom surface of the base plate, similarly to the flat plate portion 11.
  • an insulating protective layer may be formed on an outer surface of the metal foil to a predetermined thickness.
  • the base plate is made of an epoxy resin containing a glass fiber.
  • the plate diaphragm 17 shown in FIG. 13 is a case where four conductive suspensions 17 are made of a different material from the plate portion 11.
  • the conductive suspension 17 is made of a metal plate of a predetermined thickness, or a thermosetting resin phenol, polyester, epoxy on a textile fabric manufactured by interweaving carbon fibers or high rigid polyamide (aramid) fibers with each other.
  • metal foil is pressed onto the bottom of the base plate formed by impregnating any one selected from vinyl esters.
  • the four conductive suspensions 17 are fixed to protrusions 19 protruding outward from the edge of the flat plate portion 11.
  • the protrusion 19 is formed with a suspension connecting portion 25b to which the metal foil 23 is exposed.
  • the plurality of conductive suspensions 17 are fixed to the suspension connecting portion 25b to be electrically connected to the metal foil 23, and have a predetermined length of the tension portion 17b extending along the outer circumferential surface of the flat plate 11.
  • the terminal portion 17d may further include a fixing hole (not shown) into which a fixing protrusion (not shown) formed in the terminal groove 2b of the frame 2 is inserted.
  • an external electrical signal line may be connected to the terminal hole 17e by fastening a bolt.
  • the flat speaker 10 includes a frame 2 having a predetermined shape, a plurality of yokes 3, a magnet 4, and an upper plate 5 installed in the frame 2. And a plurality of voice coils 6 installed in the gap between the yoke 3 and the magnet 4 and the upper plate 5, the edges of which are fixed to the step 2a of the frame 2, Voice coils 6 are fixed and configured to include a flat plate diaphragm 7 vibrating up and down.
  • the flat plate diaphragm 7 is provided to be spaced apart from the flat plate portion 11 of the predetermined size, the edge portion 15 provided along the edge of the flat plate portion 11 and the lower portion of the edge portion 15. It consists of a plurality of conductive suspensions 17.
  • the flat plate part 11 is a flat plate positioned at the center of the flat plate diaphragm 7, and when the flat plate vibrating plate 7 vibrates up and down, the plate plate 11 vibrates as a whole to radiate sound waves.
  • the part to play. Therefore, the plate portion 11 is made of a rigid material of a certain thickness to enable the piston vibration.
  • the flat plate portion 11 is composed of a base plate of a predetermined thickness, a metal foil attached to the bottom surface of the base plate, and an insulating protective layer coated on the bottom surface of the metal foil with a predetermined thickness, wherein the metal foil is formed on a plurality of voice coils.
  • a predetermined circuit pattern is formed to transmit an electrical signal.
  • a plurality of through holes 40 are formed in the flat plate portion 11, and a domed film 45 is attached to the upper surface thereof.
  • the plurality of through holes 40 are formed in the remaining portions except for the circuit pattern of the metal foil, thereby leaving only a skeleton having a predetermined shape.
  • the plurality of voice coils 6, the conductive suspension 17 and the edge portion 15 are attached to the skeleton.
  • the lead wire 6a and the conductive suspension 17 of the voice coil 6 are connected to the circuit pattern of the metal foil.
  • the flat speaker 10 uses a glass fiber impregnated with an epoxy resin to manufacture the flat plate portion 11 to increase the lightness and rigidity and elasticity, and to obtain high power as well as the flat plate portion 11.
  • a plurality of through-holes (40) can reduce the weight while maintaining the thickness and rigidity.
  • a circuit pattern on the metal foil attached to the flat plate portion 11 can connect a plurality of voice coils in series or in parallel, it is not only easy to install a voice coil, but also when connecting a plurality of voice coils in parallel The heat generated in the coil can be minimized.
  • the flat plate diaphragm and the flat speaker using the same may be used in various electronic devices, automobiles, display devices, flat TVs, and the like.

Landscapes

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

Abstract

La présente invention concerne un diaphragme plat et un haut-parleur plan l'utilisant. Le diaphragme plat de l'invention comprend une plaque de base constituée de résine époxy contenant de la fibre de verre ; une feuille métallique fixée à une surface inférieure de la plaque de base et sur laquelle est formé un motif de circuit permettant de connecter électriquement des bobines acoustiques ; une unité de bord annulaire agencée le long d'un bord de la plaque de base ; et une pluralité de suspensions conductrices électriquement connectées au motif de circuit de la feuille métallique pour transférer des signaux électriques et empêcher les vibrations excessives de la plaque de base.
PCT/KR2011/001319 2010-02-26 2011-02-25 Diaphragme plat et haut-parleur plan l'utilisant WO2011105844A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020100017713A KR101043525B1 (ko) 2010-02-26 2010-02-26 평판 진동판과 이를 이용한 평면 스피커
KR10-2010-0017713 2010-02-26

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WO2011105844A2 true WO2011105844A2 (fr) 2011-09-01
WO2011105844A3 WO2011105844A3 (fr) 2012-01-12

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KR (1) KR101043525B1 (fr)
WO (1) WO2011105844A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021093115A1 (fr) * 2019-11-11 2021-05-20 歌尔股份有限公司 Membrane conductrice pour dispositif de production sonore et dispositif de production sonore
FR3133719A1 (fr) * 2022-03-16 2023-09-22 Devialet Haut-parleur coaxial à membrane comprenant un matériau isolant, et deux lames conductrices fixées sur ou dans la membrane
FR3140726A1 (fr) * 2022-10-10 2024-04-12 Devialet Haut-parleur à membrane et procédé de réalisation associé

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102045267B1 (ko) * 2019-01-28 2019-11-15 범진시엔엘 주식회사 슬림형 스피커용 동판 댐퍼
KR20220142094A (ko) * 2021-04-14 2022-10-21 삼성전자주식회사 스피커 모듈 및 이를 포함하는 전자 장치

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KR19990040399U (ko) * 1998-04-30 1999-11-25 이형도 다수의 자기회로를 갖는 평면 스피커
KR200316553Y1 (ko) * 2003-02-11 2003-06-18 학교법인주성학원 음향 진동자
JP2005323313A (ja) * 2004-05-11 2005-11-17 Star Micronics Co Ltd 電気音響変換器
JP2007312269A (ja) * 2006-05-22 2007-11-29 Kyocera Chemical Corp 平面スピーカー用振動板、及びそれを用いた平面スピーカー
KR20090080597A (ko) * 2008-01-22 2009-07-27 이재일 평판형 스피커

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KR19990040399U (ko) * 1998-04-30 1999-11-25 이형도 다수의 자기회로를 갖는 평면 스피커
KR200316553Y1 (ko) * 2003-02-11 2003-06-18 학교법인주성학원 음향 진동자
JP2005323313A (ja) * 2004-05-11 2005-11-17 Star Micronics Co Ltd 電気音響変換器
JP2007312269A (ja) * 2006-05-22 2007-11-29 Kyocera Chemical Corp 平面スピーカー用振動板、及びそれを用いた平面スピーカー
KR20090080597A (ko) * 2008-01-22 2009-07-27 이재일 평판형 스피커

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021093115A1 (fr) * 2019-11-11 2021-05-20 歌尔股份有限公司 Membrane conductrice pour dispositif de production sonore et dispositif de production sonore
FR3133719A1 (fr) * 2022-03-16 2023-09-22 Devialet Haut-parleur coaxial à membrane comprenant un matériau isolant, et deux lames conductrices fixées sur ou dans la membrane
FR3140726A1 (fr) * 2022-10-10 2024-04-12 Devialet Haut-parleur à membrane et procédé de réalisation associé

Also Published As

Publication number Publication date
KR101043525B1 (ko) 2011-06-23
WO2011105844A3 (fr) 2012-01-12

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