WO2021095187A1 - Dispositif de haut-parleur - Google Patents

Dispositif de haut-parleur Download PDF

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Publication number
WO2021095187A1
WO2021095187A1 PCT/JP2019/044613 JP2019044613W WO2021095187A1 WO 2021095187 A1 WO2021095187 A1 WO 2021095187A1 JP 2019044613 W JP2019044613 W JP 2019044613W WO 2021095187 A1 WO2021095187 A1 WO 2021095187A1
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WIPO (PCT)
Prior art keywords
diaphragm
vibrating device
vibration
core material
vibrating
Prior art date
Application number
PCT/JP2019/044613
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English (en)
Japanese (ja)
Inventor
金平 横濱
正己 濱岡
益久 小林
Original Assignee
株式会社山の加工場ネットワーク
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Application filed by 株式会社山の加工場ネットワーク filed Critical 株式会社山の加工場ネットワーク
Priority to JP2020500767A priority Critical patent/JP6810436B1/ja
Priority to PCT/JP2019/044613 priority patent/WO2021095187A1/fr
Publication of WO2021095187A1 publication Critical patent/WO2021095187A1/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
    • 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

Definitions

  • the present invention relates to a speaker device.
  • Patent Document 1 Wood has been widely used as a material for houses, furniture, tools, etc. since ancient times because it has excellent functionality and workability.
  • Patent Document 1 has been proposed as using wood for a speaker device.
  • the speaker body is closely attached to a hollow log hollowed out inside, and the front portion of the speaker body is closely attached to an opening provided on the side surface of the hollow log.
  • a device built in to do so has been proposed. It is stated that this speaker device has a high degree of airtightness and less sound reflection and cracking, in addition to being an interior made of natural materials.
  • Patent Document 2 is provided so as to cover the drive member at the other end of a tubular drive member having one end provided on a cap made of an elastic material that protects the voice coil of the actuator.
  • the amplification means and the transmission means provided in the amplification means are provided, and the end portion of the voice coil and the end portion of the drive member are arranged so as to face each other with the cap interposed therebetween.
  • the speaker device described in Patent Document 1 uses an existing speaker body including a diaphragm, and since it is built in a hollow log, it is superior in terms of sound reflection and the like. Even if there is a property, it does not improve the characteristics of the speaker itself.
  • a technology for using wood as a diaphragm there is a technology in which a plurality of thin plates with a grain or a grain are stacked, but the configuration focuses on acoustic characteristics and mass productivity. There is a need for a speaker device with higher palatability, such as excellent appearance.
  • the present invention has been made in view of such a background, and is excellent in acoustic characteristics and appearance in a speaker device provided with a vibration device and a diaphragm, and vibration generated from the vibration device is efficiently converted into a diaphragm. It is an object of the present invention to provide a speaker device capable of transmitting.
  • the speaker device of the present invention is a speaker device including a diaphragm and a vibration device, and radiating the vibration transmitted from the vibration device as sound from the diaphragm.
  • the diaphragm is abbreviated by cutting a log into round slices. It is a plate-like body having concentric annual rings, and includes a core material portion where the center of the annual ring is located and a white line band between the core material portion and the sapwood portion, and the entire outer circumference of the core material portion is It is covered with the white line band, and the vibrating device is directly or indirectly abutted on the core material portion to transmit vibration to the diaphragm.
  • the diaphragm is characterized by being a dried plate-like body obtained by cutting a log into round slices and thinning the thickness of the white line band with respect to the core material portion and the sapwood portion.
  • the speaker device is provided so as to surround the vibrating device and face the vibrating plate or the auxiliary vibrating plate with a frame provided on the vibrating plate or the auxiliary vibrating plate, and sandwiching the frame and the vibrating device.
  • the frame body is provided with a gap between the frame body and the outer periphery of the vibrating device, and the elastic body straddles the frame body and the vibrating device.
  • the frame body, the vibrating device, and the elastic body are integrated with each other.
  • the outer peripheral shape of the vibrating device is substantially cylindrical, the drive shaft of the vibrating device is provided in the center of the vibrating device, and a radial gap between the inner circumference of the frame and the outer circumference of the vibrating device is provided. , It is characterized in that it is substantially constant over the entire circumferential direction.
  • the vibrating device and the frame body are characterized in that the entire surface of the vibrating plate or the auxiliary vibrating plate on the opposite side is fixed to the elastic body.
  • the end portion of the driving shaft directly contacts the core material portion of the diaphragm so that an urging force is generated in the axial direction of the driving shaft of the vibrating device when the vibrating device is operated.
  • the speaker device of the present invention includes a diaphragm and a vibrating device, and radiates the vibration transmitted from the diaphragm as sound from the diaphragm.
  • the diaphragm forms a substantially concentric annual ring obtained by cutting a log into round slices. It is a plate-like body having a core material portion, including a core material portion where the center of the annual ring is located and a white line band between the core material portion and the sapwood portion, and the entire outer circumference of the core material portion is covered with the white line band.
  • the vibrating device Since the vibrating device is directly or indirectly abutted against the core material to transmit the vibration to the diaphragm, the appearance of the diaphragm has a natural texture including a substantially concentric annual ring, and the appearance is improved. Excellent.
  • the frequency characteristics due to the acoustically random vibration form formed by the annual rings, the frequency characteristics are unlikely to change around the diaphragm, and a natural and soft sound can be produced, which is excellent in acoustic characteristics.
  • the diaphragm is a dried plate-like body in which a log is sliced into round slices and the thickness of the white line band is thinned with respect to the core material portion and the sapwood portion, cracking during use can be prevented.
  • the speaker device includes a frame body provided on the vibrating plate or the auxiliary vibrating plate so as to surround the vibrating device, and an elastic body provided on the vibrating plate or the auxiliary vibrating plate so as to sandwich the frame body and the vibrating device.
  • the frame body is provided with a gap between the frame body and the outer periphery of the vibrating device, and the elastic body straddles the frame body and the vibrating device and is fixed to the frame body and the vibrating device. Since the body, the vibrating device, and the elastic body are integrated, in the elastic body, an operation that follows the movement in the drive axis direction of the vibrating device occurs when the vibrating device is operated, and this elastic body is the vibrating device and the frame.
  • the movement of the vibrating device in the direction parallel to the body is prevented, and an urging force in the drive axis direction of the vibrating device is applied to the vibrating device.
  • the vibration generated from the vibrating device is efficiently transmitted to the diaphragm or the auxiliary vibrating plate that is in direct contact with the vibrating device, the volume is secured, and a clear sound in a wide range can be produced.
  • the outer peripheral shape of the vibrating device is substantially cylindrical, the drive shaft of the vibrating device is provided in the center of the vibrating device, and the radial gap between the inner circumference of the frame and the outer circumference of the vibrating device is the circumference.
  • the distortion of the urging force due to the elastic body is eliminated, and the vibration generated from the vibrating device is more efficiently transmitted to the diaphragm. Therefore, the volume is secured more, and a clearer sound with a wide range can be produced.
  • the elastic body is a vibrating device in the direction in which the vibrating device and the frame body are arranged side by side.
  • the movement of the vibrating device can be further prevented, and the urging force in the drive axis direction of the vibrating device can be applied to the vibrating device without waste.
  • the end of the drive shaft is directly in contact with the core material of the diaphragm, or the diaphragm is so that an urging force is generated in the axial direction of the drive shaft when the diaphragm operates.
  • the diaphragm or the auxiliary diaphragm is contacted.
  • the end of the drive shaft does not float, and the vibration generated by the diaphragm is continuously transmitted to the diaphragm or auxiliary diaphragm.
  • this contact point is the core material portion (preferably the center of the annual ring), the vibration of the sound spreads like ripples along the annual ring and has excellent acoustic characteristics.
  • This conventional diaphragm is manufactured by stacking a plurality of thin plates having a grain or a grain and press-molding them. As a result, the entire diaphragm is structurally uniform. When adjusting the acoustic characteristics, the structural plate may be provided with folds or protrusions processed. In this type of diaphragm, since wood with a grain or a grain is used from the viewpoint of handleability, the orientation of the xylem fibers is mainly in the horizontal direction with respect to the board.
  • the diaphragm in the present invention is obtained by using the annual rings of natural wood.
  • the diaphragm in the present invention is a plate-like body obtained by cutting a log into round slices to a predetermined thickness, and both planes of the diaphragm are end faces, and substantially concentric annual rings can be seen. Further, in this diaphragm, at least the entire core material portion where the tree core, which is the center of the annual ring, is located, and the white line band covering the entire outer circumference of the core material portion are said to exist. In this log round diaphragm, the orientation of the wood fibers is mainly in the direction perpendicular to the plate. In the speaker device of the present invention, the vibration device is directly or indirectly brought into contact with the core material portion which is the central portion to transmit the vibration.
  • the cut surface of the log seems to be uniform like the grain plate, but there is a slight non-uniformity.
  • This non-uniformity (variation) is extremely small, such as wood quality, density, and subtle irregularities in annual rings, and spreads radially over the entire surface centering on the tree core.
  • the presence of the above-mentioned non-uniformity in the regularity of spreading in such a ripple shape forms an acoustically random vibration form.
  • This acoustically random vibration form is considered to bring out acoustically favorable characteristics.
  • FIG. 1 is a plan view (front surface) of the speaker device of this form
  • FIG. 2 is a cross-sectional view of the speaker device of FIG.
  • the speaker device 1 of this form is a device in which the vibration device 3 is brought into contact with one surface side of the diaphragm 2 and the vibration transmitted from the vibration device 3 is radiated as sound from the diaphragm 2.
  • the diaphragm 2 is a plate-like body having substantially concentric annual rings obtained by cutting logs into round slices. As shown in FIG.
  • the diaphragm 2 of this form includes a core material portion 21 in which the tree core is located, a sapwood portion 23, and a white line band 22 between the core material portion 21 and the sapwood portion 23. ..
  • the entire core material portion 21 where the tree core, which is the center of the annual ring, is located remains, and the entire outer circumference of the core material portion 21 is covered with the white line band 22. Further, the entire outer circumference of the white line band 22 is covered with the sapwood portion 23.
  • the vibration device 3 is in contact with the core material portion 21 to transmit vibration to the diaphragm 2.
  • the core material portion 21 is a reddish portion of the color at the center of the cross section of the log and is also called “red meat”
  • the sapwood portion 23 is the white portion of the outer periphery of the log cross section and has a white color. Also called “Shirata”.
  • the white line band 22 is also referred to as a "transition portion" from the core material portion 21 to the sapwood portion 23. Since the white line band 22 limits the movement of water between the core material portion 21 and the sapwood portion 23, the water contents of the core material portion 21 and the sapwood portion 23 are different. The density and hardness of each part increase in the order of the sapwood portion 23, the core material portion 21, and the white line band 22 in a sufficiently dry state.
  • the portion of the white line band 22 has a high cell density and is denser and harder than the core material portion 21. This is the tendency as a whole, but in a narrower range, there are random variations as described above.
  • the core material portion 21, the sapwood portion 23, and the white line band 22 can be distinguished by the difference in color tone by visually observing the cross section of the log. In addition, if there is no difference in color tone depending on the tree species and it is difficult to distinguish them in appearance, it is possible to distinguish them by the difference in water content or the like. If the sapwood portion 23 is included, at least the white line band 22 is included.
  • the diaphragm 2 may include at least the entire core material portion 21 where the tree core, which is the center of the annual ring, is located, and the white line band 22 that covers the entire outer circumference of the core material portion 21, and the sapwood portion 23 may be included as necessary. May be cut. Vibration is transmitted by the fibers of the annual rings, amplified by the entire diaphragm 2, and radiated as sound. Therefore, high-pitched sounds are likely to be produced from the hard part of winter eyes with a small amount of growth, and from the soft part of Natsume with a large amount of growth. Bass is likely to be produced, and vibration in which treble and bass are mixed is likely to occur.
  • the diaphragm 2 has a density difference and a hardness difference that spread like ripples from the vibration source and the above-mentioned randomness by including the core material portion 21 including the center of the annual ring to the white line band 22.
  • the diaphragm can produce a wide range of sounds from low to high frequencies.
  • the core material portion 21 is excellent in responsiveness and followability, and a clear sound in a wide range can be produced.
  • the speaker device of the present invention eliminates the need for a fixing member such as a baffle by using the core material of the annual ring and the white line band and sapwood that surround the core material that is naturally provided during the growth of the tree. it can.
  • the thickness of the diaphragm 2 is not particularly limited, but is generally 0.3 mm to 50 mm. The thinner the diaphragm 2, the better the responsiveness and followability, and the better the treble characteristics, but if it is too thin, the bass characteristics are inferior.
  • the preferable range of the thickness of the diaphragm 2 is 15 mm to 30 mm. Within this range, the balance between the characteristics of the bass range and the treble range is excellent.
  • a plurality of log sliced thin plates may be bonded together. For example, it can be formed by laminating two thin plates of 0.3 to 1.0 mm. Further, it is possible to form a shape in which another material (for example, Japanese paper) is sandwiched between the bonding.
  • the shape of the outer peripheral edge of the diaphragm 2 is not particularly limited. A more natural texture can be obtained by making the shape so that the outer peripheral edge (sapwood part) of nature is left. In addition, the bark may be removed or left.
  • the diaphragm has a plate shape having the above-mentioned thickness, but it does not have to be a perfect flat plate shape and may have a bent shape.
  • the log tree species used as the raw material for the diaphragm 2 is not particularly limited, and general tree species (coniferous trees, hardwoods) can be used. Coniferous trees are preferable because the annual rings are easy to understand and the disturbance of frequency characteristics can be easily reduced. Specific examples of coniferous trees include tree species such as Pinaceae, Taxodiaceae, Cupressaceae, Yellowwood, Araucariaceae, Yews, and Cephalotaxaceae.
  • the diaphragm 2 is a plate-like body obtained by cutting a log into round slices to a predetermined thickness.
  • This plate-like body is a sufficiently dried hard material. It has reached an equilibrium state with a constant moisture content according to the temperature and humidity of the atmosphere, and the wood cells contract when sufficiently dried.
  • the air-dry specific gravity (g / cm 3 ) of the diaphragm 2 is preferably about 0.3 to 0.65, more preferably about 0.3 to 0.5.
  • Such a hard diaphragm 2 tends to be a point sound source at the contact point of the contact portion of the diaphragm 3, and receives the vibration generated by the vibration device 3 intensively to become a strong vibration, and the entire diaphragm 2 is smooth. Vibration is transmitted to.
  • the diaphragm 2 has an appropriate viscosity, and the coefficient of restitution of the surface is lower than that of a metal or hard plastic one. Therefore, regardless of whether the diaphragm 2 is vibrated by either momentary excitation by an external force or continuous excitation, the radiated sound can be obtained as a "soft sound" having a small high frequency component.
  • a known drying method can be used for drying logs.
  • there are natural drying and artificial drying and as artificial drying, dehumidifying type, high temperature type, induction heating type and the like can be used.
  • wood with a core material such as a log has a different water content depending on the part, so when it is dried, it cracks due to the difference in internal stress due to the difference in shrinkage between the core material and the sapwood. May occur.
  • the presence or absence of cracks in the diaphragm 2 in the present invention does not have a particularly large effect, but those without cracks are preferable in terms of appearance and the like.
  • the diaphragm 2 is preferably a dried body obtained by cutting a log into round slices and drying a plate-like body in which the thickness of the white line band is thinned with respect to the core material portion and the sapwood portion.
  • the white wire band portion is shaved from one side or both sides so as to be thinner than the core material portion and the sapwood portion. After that, drying it makes it easier to prevent cracking during drying. In addition, the internal stress is reduced, and cracking during use as a speaker can be prevented.
  • the vibrating device 3 is not particularly limited as long as it is a device capable of transmitting vibration by abutting on the core material portion 21.
  • a piezoelectric element actuator, a magnetostrictive actuator, or the like may be used.
  • the portion to be brought into contact with the core material portion 21 of the vibrating device 3 is preferably in a form close to a point sound source by reducing the contact area. Further, by bringing this portion into contact with the tree core, which is the center of the annual ring in the core material portion 21, the above-mentioned effects of the present invention can be easily obtained. Further, another member may be interposed between the vibrating device 3 and the core material portion 21 as long as they are in close contact with each other.
  • FIG. 3 is a plan view (back surface) of the speaker device of this form
  • FIG. 4 is a cross-sectional view of the speaker device of FIG.
  • the speaker device 1 of this form includes a diaphragm 2, a vibrating device 3, a frame body 4 provided on the vibrating plate 2 so as to surround the vibrating device 3, and a vibrating plate 2 sandwiching the frame body 4 and the vibrating device 3. It is provided with an elastic body 5 provided so as to face each other.
  • the diaphragm 2 is the same as the embodiment of FIGS. 1 and 2, and the configuration other than the diaphragm 2 is different from that of the embodiments of FIGS. 1 and 2.
  • the frame body 4 is provided with a gap 32 between the frame body 4 and the outer circumference of the vibrating device 3.
  • the elastic body 5 straddles the frame body 4 and the vibrating device 3, and is fixed to the frame body 4 and the vibrating device 3.
  • the vibrating device 3 has a drive shaft 31, the end of which is in contact with the core material portion 21 of the diaphragm 2.
  • the drive shaft 31 is fixed to the vibrating device 3 and integrated with the vibrating device 3.
  • one vibrating device 3 is provided for the diaphragm 2, but the present invention is not limited to this, and a small vibrating device can be used as long as the contact point is within the range of the core material portion 21. It is possible to provide more than one.
  • a substantially columnar drive shaft 31 provided in the vicinity of the central axis of vibration of the vibration device 3 is in contact with the diaphragm 2.
  • the drive shaft 31 is preferably brought into contact with the tree core O, which is the center of the annual ring, among the core material portions 21 of the diaphragm 2.
  • the axial direction of the drive shaft 31 is a direction along the Z direction in the drawing, and the end portion of the drive shaft 31 is in contact with the plane of the diaphragm 2 (the plane in the XY direction) substantially perpendicularly.
  • the vibration generated by the vibrating device 3 is designed to be concentrated on the contacted portion (tree core O of the core material portion 21) of the drive shaft 31 in the diaphragm 2.
  • the vibrating device 3 can efficiently transmit the vibration to the diaphragm 2 even if it is a weak vibration.
  • the frame body 4 arranged so as to surround the diaphragm 3 and the vibration device 3 are on the side opposite to the side of the drive shaft 31 in contact with the diaphragm 2 of the diaphragm 3.
  • the surface is provided so as to be connected to the frame body 4 via the elastic body 5.
  • the elastic body 5 operates following the operation of the drive shaft 31, and the diaphragm 2, the frame body 4, the vibrating device 3, and the elastic body 5 are integrated.
  • the vibration generated from the vibrating device 3 can be continuously and efficiently transmitted to the diaphragm, the volume can be secured, and a clear sound having a wide range can be produced.
  • the contact point of the drive shaft 31 is the tree core O of the core material portion 21, the vibration of the sound spreads like ripples along the annual rings and has excellent acoustic characteristics.
  • the vibrating device 3 makes a contact portion of the drive shaft 31 that is in contact with the diaphragm 2 when the vibrating device 3 operates.
  • a pendulum-like motion may occur as a fulcrum to hinder the motion of the drive shaft 31 on the drive shaft in the Z direction.
  • the vibration generated from the vibrating device 3 may not be continuously and efficiently transmitted to the diaphragm.
  • the drive shaft 31 of the vibrating device 3 vibrates with the drive shaft 31 due to the provision of the elastic body 5 regardless of whether the portion in contact with the diaphragm 2 is fixed or not fixed.
  • the plate 2 is in close contact with the plate 2, and the same effect can be obtained.
  • the elastic body 5 includes a frame body 4 provided on the diaphragm 2, a gap 32 uniformly arranged on the outer periphery of the vibration device 3, and the vibration device 3.
  • the vibrating device 3 on the side facing the diaphragm 2 with the frame body 4 sandwiched between them and the frame body 4 are provided over the entire surface in the X direction and the Y direction so as to cover the diaphragm body 4.
  • the outer peripheral shape of the vibrating device 3 is substantially cylindrical
  • the inner peripheral shape of the frame 4 on the vibrating device 3 side is a substantially cylindrical shape facing the outer peripheral shape of the vibrating device 3.
  • the drive shaft 31 is provided in the center of the vibrating device 3, and the radial gap 32 between the inner circumference of the frame 4 and the outer circumference of the vibrating device 3 is constant over the entire circumferential direction.
  • the entire surface (the entire surface in the X and Y directions) of the vibrating device 3 and the frame 4 on the plane side (the side with which the vibrating device abuts) facing each other is fixed to the elastic body 5.
  • the frame body 4 and the vibrating device 3 are connected by being fixed to the elastic body 5 in a state where there is no internal stress (tension or bending).
  • the fixing method is not particularly limited, but any method such as adhesion by applying an adhesive, adhesion by double-sided tape, and melt adhesion between members can be adopted.
  • the elastic body 5 has a uniform adhesive force on the entire surface of the vibrating device 3 and the frame 4 on the opposite side of the vibrating plate 2 on the flat side (the entire surface in the X and Y directions) using an adhesive or double-sided tape. It is preferable to stick to.
  • the elastic body 5 When the elastic body 5 is provided as described above, stress that becomes an urging force does not act in any of the X direction, the Y direction, and the Z direction of the elastic body 5 when the vibrating device 3 is not operated, and the vibrating device 3 Is stable.
  • the vibrating device 3 When the vibrating device 3 is operated, the elastic body 5 is moved in the X, Y, and Z directions to generate internal stress, and the vibrating device 3 is operated in the X and Y directions due to tension and bending in the gap 32.
  • the above actions work at the same time.
  • the internal stress generated in the elastic body 5 is relaxed at the portion of the gap 32, and the movement of the vibrating device 3 in the side-by-side direction (X direction and Y direction) of the vibrating device 3 and the frame body 4 is blocked and stabilized.
  • the elastic body 5 causes an operation that follows the movement of the drive shaft 31 of the vibrating device 3 in the Z direction, and the elastic body 5 is subjected to internal stress. It is generated and the repulsive force of the internal stress in the Z direction (FIG. 4) acts as an urging force applied to the vibrating device 3. Due to this urging force, the portion of the vibrating device 3 that comes into contact with the vibrating plate 2 does not float, and the vibration generated by the vibrating device 3 can be continuously transmitted to the core material portion 21 of the vibrating plate 2. Further, the urging force is a force in the Z direction, which is the vibration direction of the drive shaft 31, without any deviation in the X direction or the Y direction.
  • the vibration generated by the vibrating device 3 can be efficiently transmitted to the diaphragm 2, the volume is secured, and a clear sound in a wide range can be produced.
  • the vibration of the vibrating device is a weak vibration, it is possible to produce a clear sound in a wide range.
  • the elastic body 5 is particularly limited as long as it can hinder the movement of the vibrating device 3 in the juxtaposed direction of the vibrating device 3 and the frame body 4 and follow the vibrating operation of the drive shaft 31 of the vibrating device 3. Not done.
  • a sheet having a predetermined thickness using rubber is preferable.
  • the frame 4 is made of a sheet of rubber having a thickness of about 1 mm to 10 mm, preferably a sheet of foamable natural rubber adjusted to a thickness of 3 mm. It is preferable that the rubber is processed into a shape that matches the outer shape of the rubber. It can also be formed using a material having a similar function.
  • the frame body 4 wood, wood-based material, bamboo, gypsum board, metal, glass, hard plastic, etc. can be adopted. Further, it is preferable to use the same material as the diaphragm 2. As the shape, those as exemplified in FIGS. 3 and 4 are preferable. That is, the elastic body 5 in the stationary state is in the form of a flat plate sheet substantially parallel to the diaphragm 2, and the surface of the elastic body 5 fixed to the frame 4 and the vibrating device 3 is a surface parallel to the diaphragm 2.
  • the Z-direction dimension of the frame body 4 is such that the surface of the vibrating device 3 obtained when the vibrating device 3 is allowed to stand still on the vibrating plate 2 is the surface opposite to the surface on which the drive shaft 31 is provided.
  • the elastic body 5 is provided so as to be parallel to 2 and flush with the surface opposite to the side surface of the diaphragm 2 of the frame body 4, the internal stress is applied in the Z direction of the elastic body 5. It is preferable that the dimensions are such that they are not added.
  • the planar shape of the frame body 4 is preferably formed into a square having a dimension approximately twice the planar dimension of the vibrating device 3 as one side.
  • FIG. 5 is a plan view of the speaker device of this form.
  • the speaker device 1 of this form is an example in which the inner peripheral shape of the frame body 4 on the vibrating device 3 side is an octagonal shape.
  • the configuration of the frame body 4 other than the inner peripheral shape is the same as that of the embodiments of FIGS. 3 and 4.
  • the outer peripheral shape of the vibrating device 3 is substantially cylindrical.
  • the drive shaft 31 of the vibrating device 3 is provided in the center of the vibrating device 3, and the radial gap 32 between the inner circumference of the frame body 4 and the outer circumference of the vibrating device 3 becomes substantially constant over the entire circumferential direction.
  • the uniformity of the gap is inferior to that of the case of FIG.
  • the substantially uniform gap eliminates the distortion of the urging force due to the elastic body, and the vibration generated from the vibrating device is efficiently vibrated. Is transmitted to.
  • the inner peripheral shape of the frame body 4 on the vibrating device 3 side may be an octagon or more polygonal shape.
  • FIG. 6 is a cross-sectional view of the speaker device of this form.
  • the speaker device 1 of this form is an example in which the auxiliary diaphragm 6 is provided between the diaphragm 2 and the diaphragm.
  • the configuration is the same as that of the embodiments of FIGS. 3 and 4 except that the auxiliary diaphragm 6 is provided.
  • the vibrating device 3 is directly in contact with the auxiliary vibrating plate 6 which is in contact with the vibrating plate 2, and is indirectly in contact with the core material portion 21 of the vibrating plate 2 via the auxiliary vibrating plate 6.
  • the auxiliary diaphragm 6 and the diaphragm 2 are closely fixed so as not to cause a vibration transmission loss. According to this form, a portion other than the diaphragm 2 which is a log round cutting material can be unitized, and the productivity is excellent.
  • FIG. 7 is a cross-sectional view of the speaker device of this form.
  • the speaker device 1 of this form is an example in which the vibrating device 3 is stationary on the diaphragm 2 by increasing the area where the end portion of the drive shaft 31 abuts on the diaphragm 2.
  • the configuration other than the drive shaft 31 is the same as that of the embodiments of FIGS. 3 and 4.
  • the drive shaft 31 has a structure in which a disc-shaped flange portion is provided at one end of a substantially columnar main body. This flange portion is the end portion of the drive shaft 31, and the disk plane of the flange portion is in contact with the core material portion 21 of the diaphragm 2.
  • the diaphragm 2 may be formed with a concave portion corresponding to the end portion of the drive shaft 31, and the end portion of the drive shaft 31 may be fitted therein. This facilitates positioning during assembly and improves workability.
  • FIG. 8 is a cross-sectional view of the speaker device of this form.
  • the speaker device 1 of this form is an example in which the area where the end portion of the drive shaft 31 abuts on the diaphragm 2 is increased, the vibration device 3 is fixed to the diaphragm 2, and the auxiliary member 41 is provided on the frame body 4.
  • the configuration other than the drive shaft 31, the frame body 4, and the auxiliary member 41 is the same as that of the embodiments of FIGS. 3 and 4, and the detailed configuration of the drive shaft 31 is the same as that of the embodiment of FIG.
  • a resin material, an elastic material such as rubber or urethane, or the like can be adopted. Since a thin diaphragm of log slices, which is a natural material, is used as the diaphragm 2, the diaphragm may be bent or the like. Even in this case, by providing the auxiliary member, the end portions of the frame body and the drive shaft can be easily brought into close contact with the diaphragm.
  • the speaker device of the present invention is excellent in acoustic characteristics and appearance, and can efficiently transmit the vibration generated from the vibration device to the diaphragm. Therefore, by appropriately selecting the size and texture of the log as a raw material. , Can be widely used as a speaker device in various applications. Further, the speaker device of the present invention can be used in various installation methods such as fixing to a frame made of glass, metal, resin or the like, hanging a part of a diaphragm with a hole, and placing it on a plate stand.

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  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

Un dispositif de haut-parleur est fourni, comprenant un dispositif de vibration et un diaphragme, le dispositif de haut-parleur présentant une excellente caractéristique acoustique et un excellent aspect extérieur et une vibration générée par le dispositif de vibration pouvant être efficacement acheminée vers le diaphragme. Un dispositif de haut-parleur 1 est un dispositif qui comprend un diaphragme 2 et un dispositif de vibration 3 pour amener une vibration acheminée depuis le dispositif de vibration 3 à être rayonnée depuis le diaphragme 2 en tant que son, le diaphragme 2 étant un objet en forme de plaque ayant été découpé en tranche ronde à partir d'un bois rond et ayant des anneaux annuels presque concentriques et comprenant une partie centrale 21 au niveau de laquelle le centre des anneaux annuels est situé et une zone blanche 22 entre la partie centrale 21 et une partie albrunum 23 avec toute la périphérie de la partie centrale 21 enveloppée dans la zone blanche 22, et le dispositif de vibration 3 étant agencé de façon à venir en butée directement ou indirectement sur la partie centrale 21 et à acheminer la vibration au diaphragme 2.
PCT/JP2019/044613 2019-11-13 2019-11-13 Dispositif de haut-parleur WO2021095187A1 (fr)

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JP2020500767A JP6810436B1 (ja) 2019-11-13 2019-11-13 スピーカー装置
PCT/JP2019/044613 WO2021095187A1 (fr) 2019-11-13 2019-11-13 Dispositif de haut-parleur

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013172415A (ja) * 2012-02-22 2013-09-02 Jvc Kenwood Corp スピーカ及びスピーカの製造方法
JP2016058936A (ja) * 2014-09-11 2016-04-21 金平 横濱 スピーカー装置
JP2018078410A (ja) * 2016-11-08 2018-05-17 株式会社山の加工場ネットワーク スピーカー装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4577262B2 (ja) * 2006-04-28 2010-11-10 日本ビクター株式会社 スピーカとそのスピーカの振動板製造方法
JP7149805B2 (ja) * 2018-10-26 2022-10-07 三菱電機株式会社 車両管理装置、車両管理方法及び車両管理プログラム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013172415A (ja) * 2012-02-22 2013-09-02 Jvc Kenwood Corp スピーカ及びスピーカの製造方法
JP2016058936A (ja) * 2014-09-11 2016-04-21 金平 横濱 スピーカー装置
JP2018078410A (ja) * 2016-11-08 2018-05-17 株式会社山の加工場ネットワーク スピーカー装置

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JPWO2021095187A1 (ja) 2021-11-25
JP6810436B1 (ja) 2021-01-06

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