WO2008004273A1 - Dispositif de transmission de vibrations, dispositif de transmission de la voix, et pastille à vibrations - Google Patents

Dispositif de transmission de vibrations, dispositif de transmission de la voix, et pastille à vibrations Download PDF

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Publication number
WO2008004273A1
WO2008004273A1 PCT/JP2006/313254 JP2006313254W WO2008004273A1 WO 2008004273 A1 WO2008004273 A1 WO 2008004273A1 JP 2006313254 W JP2006313254 W JP 2006313254W WO 2008004273 A1 WO2008004273 A1 WO 2008004273A1
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WO
WIPO (PCT)
Prior art keywords
vibration
pad
transmission device
sound
back surface
Prior art date
Application number
PCT/JP2006/313254
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English (en)
Japanese (ja)
Inventor
Motoaki Suzukawa
Original Assignee
Frey Co., Ltd.
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
Application filed by Frey Co., Ltd. filed Critical Frey Co., Ltd.
Priority to JP2008523555A priority Critical patent/JPWO2008004273A1/ja
Priority to PCT/JP2006/313254 priority patent/WO2008004273A1/fr
Publication of WO2008004273A1 publication Critical patent/WO2008004273A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R15/00—Magnetostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/13—Hearing devices using bone conduction transducers

Definitions

  • Vibration transmission device audio transmission device, and vibration pad
  • the present invention relates to a vibration transmission device that converts an electric signal into vibration and transmits the vibration to the outside, a sound transmission device that transmits sound, and a vibration pad that can be used in the vibration transmission device.
  • Patent Document 1 Japanese Patent Laid-Open No. 2001-258095
  • a vibration element such as a magnetostrictive element incorporated in the device. Convert to vibration.
  • the vibration is transmitted to the user's skull or the like via a vibration pad applied to a position such as near the user's ear.
  • the present invention has been made in view of such circumstances, and an object thereof is to provide a technique for reducing sound leakage generated from a vibration pad. Means for solving the problem
  • the vibration transmission device includes: a vibration conversion element that converts an electrical signal into vibration; and a vibration pad that receives the vibration of the vibration conversion element on a back surface and transmits the vibration to a surface force to the outside.
  • the pad is provided with a space penetrating between the back surface and the front surface.
  • the electrical signal may be a signal obtained by converting sound.
  • the space may be a plurality of round holes.
  • the round holes may be arranged in a substantially concentric manner.
  • the vibration pad may have a substantially disk-like outer shape in plan view.
  • the space may be a plurality of polygonal openings arranged along the outer edge of the vibration pad.
  • at least a portion for transmitting the vibration to the outside may be formed in a mesh shape, and the space of the mesh may be the space.
  • the mesh portion of the vibration pad may also have a mesh force formed by knitting a wire.
  • the front surface of the vibration pad may be a convex surface having a high center.
  • a cover may be attached to the front surface of the vibration pad, or a coating may be provided.
  • the force bar or coating may have elasticity.
  • the front surface of the cover or coating may be a convex surface having a high center.
  • the vibration You may further provide the elastic member which contacts the back surface of a pad and the said vibration conversion element.
  • the elastic member may be brought into contact with the back surface of the vibration pad and the vibration conversion element by being contracted by being pressed by the object.
  • the vibration conversion element may be a giant magnetostrictive element.
  • the sound transmission device includes a vibration conversion element that converts an electric signal for generating sound into vibration, and a vibration of the vibration conversion element.
  • a vibration pad that receives the movement on the back surface and transmits the vibration as a sound to the surface force. The vibration pad penetrates between the back surface and the front surface. Is provided.
  • the vibration pad is a vibration pad that receives the vibration of the vibrator on the back surface and transmits the surface force to the outside, and has a space penetrating between the back surface and the front surface. It is provided.
  • FIG. 1 is an exploded perspective view showing an overall schematic configuration of a bone-conduction audio transmission device according to an embodiment.
  • FIG. 2 is a cross-sectional view showing the overall internal structure of the bone-conduction sound transmission device of FIG.
  • FIG. 3 is a diagram showing an example of a vibration pad.
  • FIG. 4 is a diagram showing an example of a vibration pad.
  • FIG. 5 is a diagram showing an example of a vibration pad.
  • FIG. 6 is a diagram showing an example of a vibration pad.
  • FIG. 7 is a diagram showing an example of a vibration pad.
  • FIG. 8 is a diagram showing an example of a vibration pad.
  • FIGS. 9 (A) and 9 (B) show the state of sound leakage between the bone-conduction sound transmission device according to the embodiment and a conventional general bone-conduction sound transmission device. It is the shown schematic diagram.
  • FIG. 10 is a schematic diagram showing the configuration of the main part of a sound pressure measuring device system used in an experiment for measuring the sound pressure of sound leakage from a vibration pad.
  • FIG. 11 A table showing the specifications of various vibration pads used in the experiment and the measurement results of the sound pressure of sound leakage in a list format in association with each specification.
  • FIG. 12 is a diagram showing another example of a vibration pad.
  • FIG. 13 is a diagram showing another example of a vibration pad.
  • FIGS. 14A and 14B are diagrams showing another example of the bone-conduction type sound transmission device.
  • FIG. 15 is a diagram showing a configuration of a headphone as an example of a sound transmission device.
  • FIG. 1 is an exploded perspective view showing an overall schematic configuration of the bone-conduction sound transmission device according to the present embodiment
  • FIG. 2 shows an entire internal structure of the bone-conduction sound transmission device of FIG. A—A cross-sectional views
  • FIGS. 3 to 8 are perspective views showing variations of the outer shape of the vibration pad.
  • This bone-conduction audio transmission device 30 includes a giant magnetostrictive element 1, a biasing magnet 2 (a biasing upper magnet 2a and a biasing lower magnet 2b), a bobbin 3, a coil (main body) 4, The lead wires 5a and 5b, the vibration rod 6, the housing 7 (housings 7a and 7b), the vibration pad 8 and the spring 9 constitute the main part.
  • the giant magnetostrictive element 1 is used as a vibration converting element that converts a signal obtained by converting sound into vibration, and has a substantially cylindrical outer shape.
  • the upper surface includes a bias upper magnet 2a and a bottom surface. Are provided with biasing lower magnets 2b, respectively.
  • the giant magnetostrictive element 1 is housed inside the housings 7a and 7b while being sandwiched between a bias upper magnet 2a and a bias lower magnet 2b, and is arranged so as to have a noise upper magnet 2a and a bias lower magnet 2b. It is set so that the magnetic field due to the above is constantly received as a bias magnetic field (the bias magnetic field constantly penetrates the giant magnetostrictive element 1).
  • the giant magnetostrictive element 1 is accommodated in the housings 7a and 7b, while the bottom surface is supported by the louver 7b and the vibration rod 6 receives the elastic force of the panel 9 on the top surface. By being pressed, so-called prestress is constantly applied.
  • This giant magnetostrictive element 1 has the above-mentioned In this way, a vibration corresponding to the input electric signal is generated by receiving a variable magnetic field by the coil 4 arranged in the surroundings in a state where the bias magnetic field and the prestress are constantly applied.
  • the coil 4 is formed by winding a conductor wire 10 around a central axis of a bobbin 3 made of a material such as a glass-based polycarbonate.
  • the coil 4 When an electrical signal is input via the lead wires 5b and 5b, the coil 4 generates a magnetic field correspondingly.
  • the variable magnetic field generated by the coil 4 force penetrates the giant magnetostrictive element 1, the giant magnetostrictive element 1 expands and contracts in accordance with the strength of the variable magnetic field, and is output as vibration.
  • One end of the vibrating rod 6 is mechanically connected to the giant magnetostrictive element 1 via the biasing upper magnet 2a, and the other end is approximately the center of the back surface 80b of the vibrating pad 8 (or approximately the position of the centroid).
  • the vibration output from the giant magnetostrictive element 1 is transmitted to the vibration pad 8.
  • the vibration rod 6 is provided with a flange portion 61.
  • the flange portion 61 receives an urging force from the spring 9 and is pressed against the biasing upper magnet 2a. The pressing force is applied to the giant magnetostrictive element 1 through the upper bias magnet 2a. Further, the flange portion 61 and the panel 9 prevent the entire vibrating rod 6 from falling out of the housing 7a.
  • the housings 7a and 7b are configured so that the giant magnetostrictive element 1, the bias upper magnet 2a, the bias lower magnet 2b, the bobbin 3, the coil 4, the vibration rod 6, and the panel 9 are in a predetermined state. It is a so-called container (or body) that is housed in an assembled state. It is desirable that the housings 7a and 7b have a magnetic force so as not to leak the internal magnetic field to the outside and to generate the internal magnetic field more effectively.
  • the housing 7b is joined to the bottom of the housing 7a, which is a substantial body body, for example by welding.
  • the vibration pad 8 has a thick, substantially cylindrical shape, and a space such as a plurality of round holes 81 passing between the back surface 80b and the front surface 80a is formed in a concentric shape. It is provided so that it is lined up at equal intervals in the direction.
  • the vibration rod 6 is mechanically joined to the substantially central portion of the back surface 80b, and vibration from the giant magnetostrictive element 1 is transmitted.
  • the front surface 80a is directly pressed against the skin near the user's ear and the vibration transmitted to the back surface 80b is transmitted by the user. It is set to transmit to the skull or the like.
  • six substantially circular round holes 81 are arranged in a plan view. This round hole 81 is for suppressing or eliminating the generation of sound waves that cause sound leakage using the vibration pad 8 (the effect will be described later).
  • the material of the vibration pad various metals such as aluminum and brass, and various synthetic resins such as styrene resin can be used.
  • the front surface 80a since the front surface 80a is set so as to be pressed directly against the skin near the user's ear or the like, the front surface 80a, in particular, may interfere with the function of bone conduction. It may be as soft as it feels, or coated with a material such as synthetic rubber.
  • the vibration pad 8 in addition to the form shown in FIG. 1, the form shown in FIGS. 3 to 8 can be used.
  • the vibration pad shown in FIG. 3 has the same shape and arrangement in a plan view of the round holes 83 as those in FIG. 1, but has a disk shape with a metal plate force such as aluminum.
  • the overall thickness is as thin as about 1 mm!
  • the vibration pad shown in FIG. 4 has a larger diameter disk than in the case of FIG. 3 and a larger number of round holes 84 (specifically 20 in total) than those in FIGS. They are arranged at equal intervals in the circumferential direction of each circle so as to form two concentric circles with different radii.
  • a small R (curved surface) 80d is attached to a portion of the ridge line around the cylindrical front surface 80a that is continuous with the side surface 80c, and the front surface 80a is pushed directly onto the user's skin. Be careful not to feel bad when touched. This also applies to the vibration pad 8 shown in FIG.
  • the vibration pad shown in FIG. 5 has a diameter smaller than that of the vibration pad shown in FIG. 3 in the same diameter as that shown in FIG. Is formed by arranging a large number (18 in total) of round holes 85 so as to form two rows of concentric circles.
  • the total area of the round holes 85 is larger than that of the round holes 83 shown in FIG. 3 (in other words, the round holes 85 are subtracted and left).
  • the vibration pad area is reduced) and the arrangement of the circular holes 85 is more finely dispersed in the disc than in the case of Fig. 3.
  • each of the openings 86 having a generally triangular shape is formed on a single disk along the circumference thereof.
  • the shape of the opening 86 in plan view may be, for example, a sector, a trapezoid, a hexagon, or other polygons in addition to a triangle.
  • the vibration pad shown in FIG. 7 includes a single flat mesh (net) 71 whose outer shape is substantially disk-shaped as a main part for conducting bone conduction.
  • the substantially entire front surface 80a that is, the portion that comes into contact with the user's skin or the like, is formed in a substantially flat shape.
  • An outer peripheral frame 70 is attached to the outer periphery of the back surface 80 b of the disk-shaped mesh 71.
  • the adhesive margin 73 provided in advance around the disk-like shape of the mesh 71 is wound around the front surface (hymen) of the outer peripheral frame 70 so that the force on the front surface 80a side also wraps around the back surface 80b side.
  • the mesh 71 and the outer peripheral frame 70 are joined to each other by adhering or welding the wound portion to the surface of the outer peripheral frame 70.
  • This vibration pad also receives the vibration of the giant magnetostrictive element 1 on the back surface 80b through the vibration rod 6 and presses the vibration against the user's skin with an appropriate pressing force in the same manner as the other pads. Then, the skin force of the user is also transmitted to the skull or the like via the surface 80a, so that bone conduction is performed.
  • a material for forming the mesh 71 for example, a wire mesh formed by knitting a metal wire such as stainless steel is suitable. Alternatively, it is also possible to use a mesh that has strength such as synthetic fiber, synthetic resin, plastic, glass-based material, and the like. In addition to meshes produced by knitting metal wires or fibers, for example, a metal-like (or grid-like) vibration pad similar to or similar to a mesh is produced by punching out a thin metal plate by pressing. You may do it. The vibration rod 6 is joined to, for example, welding or caulking at substantially the center of the back surface 80b of the mesh 71.
  • the vibration pad shown in Fig. 8 is obtained by plastically forming a fine mesh 72 made by knitting a metal wire such as stainless steel into a cap shape by a press carriage using a mold or the like. It will be. Alternatively, for example, a fine mesh produced by knitting a wire such as synthetic fiber, synthetic resin, plastic, or glass-based material can be used. As with the vibration pad shown in Fig. 4, a small R (curved surface) 80d is attached to the ridge line around the disk-shaped front surface 80a and connected to the side surface 80c. Face 8 Consideration should be given so that the feel when the Oa is pressed directly against the user's skin does not deteriorate.
  • the mesh 72 It is also effective to attach an annular reinforcing material similar to that of the outer peripheral frame 70 as shown in FIG. It is.
  • the vibration rod 6 is joined to, for example, welding or caulking on almost the center of the back surface 80b of the mesh 71.
  • each of the meshes (space portions) 8 7 and 88 of the mesh is replaced with the round hole 81 and the opening 86 described above. It has become. Therefore, using meshes 71 and 72 provides a vibration pad that has a higher aperture ratio and can effectively prevent sound leakage than when a metal plate is processed to provide round holes 81 and openings 86. There is an advantage that it can be manufactured more easily.
  • the mesh mesh 87, 88 is coarser and each wire constituting the mesh is thinner, the ratio of openings (specifically, the mesh space) to the entire mesh increases. Therefore, it is effective for preventing sound leakage, but on the other hand, the thinner each wire is, the easier it is for the user to feel pain and unpleasant touch when the mesh is pressed against the user's skin. There is a fear. For such viewpoint power, it is generally desirable to use a mesh formed by knitting a thin wire rod into a coarse mesh size that does not give the user a painful feeling or an unpleasant tactile sensation.
  • Figure 9 shows the state of sound leakage associated with the vibration of the vibration pad between the bone-conduction sound transmission device (A) of this embodiment and the conventional general bone-conduction sound transmission device (B). It is the schematic diagram shown in comparison.
  • This bone-conducting sound transmission device is used, for example, by pressing the front surface 80a of the vibration pad 8 directly against the surface of the skin 100 near the user's ear.
  • an electric signal obtained by converting external force sound is input to this bone-conducting sound transmission device, the magnetic field applied to the giant magnetostrictive element 1 by the coil 4 changes, and the giant magnetostrictive element 1 is correspondingly changed. Vibrate.
  • the vibration is transmitted to the back surface 80 b of the vibration pad 8 through the vibration rod 6. And so The vibration transmitted to the back surface 80b of the vibration pad 8 is transmitted to the user's skull 101, etc. via the skin 100, etc. near the user's ear that is in contact with the front surface 80a of the vibration pad 8. Then, the so-called “bone guide” is performed.
  • the vibration pad 8 has a large number of round holes 81, openings 86, or mesh nets 87.
  • the area force S of the back surface 80b that is in direct contact with the air is reduced by at least the total area, and the leakage of the sound wave 110 from the back surface 80b to the surrounding air, which was the cause of sound leakage, is reduced.
  • the surface of the user's skin 100 exposed through the round hole 81 and the opening 86 is generally low as a secondary source of sound waves to the surroundings.
  • such a sound leakage reducing action basically has a round hole 81 or the like with respect to the entire area (or external dimensions) of the back surface 80b of the vibration pad 8.
  • the inventor has confirmed by experiments that the higher the ratio of the total area of the openings 86 or the mesh mesh 87, the more effective the ratio.
  • Fig. 10 is a schematic diagram showing the configuration of the main part of the sound pressure measuring device used in the experiment for measuring the sound pressure of sound leakage from the vibration pad, and Fig. 11 is the subject of the experiment.
  • FIG. 6 is a diagram showing the specifications of various vibration pads and the measurement results of sound pressure of sound leakage in a list form in association with each specification.
  • the bone conduction type sound transmission device 30 and the measurement microphone 21 were placed in the anechoic chamber 20, and the front surface 80a of the vibration pad 8 of the bone conduction type sound transmission device 30 was provided.
  • Micro for measurement It was placed so as to face the phone at a distance of 20 centimeters. Both were supported by support stands 22 and 23 and kept at a height of 28 to 110 centimeters from the floor.
  • the background noise in the anechoic chamber 20 was 38.4 [dB].
  • An electric signal of pink noise generated by the noise generator 24 is amplified by the power amplifier 25 and input to the bone-conduction sound transmission device 30, and vibration corresponding to the electric signal is transmitted to the bone-conduction sound transmission device 30. Output from the vibration pad 8 of the device 30.
  • a sound pressure meter 26 is connected to the measurement microphone 21, and an FFT analyzer 27 is connected to the sound pressure meter 26, and the sound pressure of the sound wave picked up by the measurement microphone 21 is converted into the sound pressure meter 26 and FFT analysis. It was made possible to measure and analyze with instrument 27.
  • the front surface 80a of the vibration pad 8 is not pressed against the skin of the user's head, and the force is set so as to freely vibrate without binding.
  • the front surface 80a of the vibration pad 8 is pressed against the skin of the user's head, which becomes a constraint condition, and sound. Since the main source of sound waves as leakage is assumed to be the back surface 80b of the vibration pad 8, the sound pressure of sound leakage from the vibration pad 8 at that time is even lower than the measured value in this experiment It is assumed that there is a tendency to become something.
  • first to seventh pads as shown in FIG. 11 were prepared. Of these, only the first pad was used as a comparative example, which was a conventional, general flat plate with no openings or mesh mesh, and slightly thicker.
  • the second pad is the same as the vibration pad shown in FIG. 4, the third pad is the same as the vibration pad shown in FIG. 3, and the fourth pad is the same as the vibration pad shown in FIG.
  • the fifth pad is the same as the vibration pad shown in FIG. 6, the sixth pad is the same as the vibration pad shown in FIG. 7, and the seventh pad is the same as the vibration pad shown in FIG. It has become a thing.
  • the material of these vibration pads is that the first pad also has a hard plastic force, the 2nd to 5th pads also have an aluminum plate force with a thickness of 1 mm,
  • the seventh pad is made of a stainless mesh produced by knitting stainless wire.
  • the sound pressure of sound leakage emitted from each of the first to seventh vibration pads is schematically shown in FIG. Each measurement was carried out using an experimental apparatus system as shown. The sound pressure of sound leakage from the first pad was 69. l [dB]. Using this as a reference value, measure the sound pressure for the other pads in the same way, and compare the sound pressure of the first node with the dB value for each of the second to seventh vibration pads. O Relative evaluation of sound pressure reduction effect of sound waves emitted from
  • the sound pressure of the sound leakage of the third pad is 62.9 [dB], and compared with that of the first pad, a sound leakage reduction effect of 6.2 [dB] is achieved. confirmed.
  • this third pad has a small number of round holes 83 of six, but the diameter of each of the round holes 83 is larger than that of the second pad round hole 84 and Since the overall outer diameter is smaller than that of the second knot, the effective length and total area force of the remaining flat and solid portion minus the portion of the round hole 83 are smaller than that of the second knot. As a result, it is considered that the third pad achieved a more effective sound leakage reduction than the second knot.
  • the sound pressure of the sound leakage of the fourth pad is 58.9 [dB], and compared with that of the first pad, a sound leakage reduction effect of 10.2 [dB] is achieved.
  • this fourth pad has a small force (the diameter) of the round hole 85.
  • the circular holes 85 are arranged in the pad more evenly and densely than the case. Since the circular hole 85 is provided, the effective length and total area of the remaining flat and solid portion (aluminum plate portion) are smaller than those of the second and third pads. Therefore, it is considered that sound leakage could be reduced more effectively than the second and third knots.
  • the sound pressure of the sound leakage of the fifth pad is 63.3 [dB], and compared with that of the first pad, the sound leakage reduction effect of 5.8 [dB] is achieved. confirmed. This is almost the same result as the third pad.
  • the size (area) of the opening 86 of the fifth pad is larger than the round holes 83 and 85 of the third and fourth pads. With all this power, the fifth pad can most effectively reduce sound leakage because the total area of the solid part, which is the source of sound leakage sound waves, is the smallest. There is expected. However, measurement According to the results, the measured sound pressure reduction effect is almost the same as that of the third pad, and the fourth pad achieves a higher effect than the fifth pad.
  • the sound pressure of the sound leakage of the sixth pad is 43.8 [dB], and compared with that of the first pad, a remarkable sound leakage reduction effect of 25.3 [dB] has been achieved. It was confirmed that The sixth pad also has a stainless mesh force that is a relatively thick stainless wire knitted coarsely, and the ratio of the total area of the mesh 87 (space) to the total area of the pad is the second to fifth pads. It is extremely large compared to the case of. In other words, the ratio of the total area of the solid part that is the source of sound leakage sound waves, specifically, the total area of all wires made up of the mesh, to all pads is compared with other pads. And extremely small.
  • each wire has a large effective length that can be a sound wave generation source, but since it is a wire, its width (diameter) is extremely small. Therefore, the effective area of each wire as a sound wave generation source is extremely small. In this way, in the sixth pad, the total area of the mesh wire that can be the source of sound leakage sound waves is extremely small, and the effective force is also a single effective area (that is, the area of each wire) Therefore, it is considered that a remarkable sound leakage reduction effect has been achieved.
  • the sound pressure of the sound leakage of the 7th pad is 43.2 [dB], and a significant sound leakage reduction effect of 25.9 [dB] is achieved compared to that of the 1st pad. It was confirmed that This is the best sound leakage reduction effect of all the pads.
  • This seventh knot consists of a stainless steel mesh knitted with a finer stainless steel wire than the sixth pad and finer than the sixth pad. The ratio of the total area is even larger than that of the sixth node, which is much larger than that of the second to fifth pads. In other words, the ratio of the total area of all the wires constituting the mesh to the generation of sound leaking sound waves in all pads is the smallest compared to other pads.
  • each of the wires has a large effective length as a sound wave generation source, similar to the sixth node. iS Its width (diameter) is even smaller than the sixth pad. Therefore, the effective area of each wire as a sound wave generation source is extremely small. In this way, in the seventh pad, the total area of the mesh wire that can be the source of sound leaking sound waves is the smallest, and the effective force is also the individual effective area (that is, the area of each wire) Therefore, it is considered that the best sound leakage reduction effect was achieved among the pads of all specifications measured in this experiment.
  • the mesh is a net made by knitting a wire material such as a fine stainless steel wire, but in addition to the net, a thin metal plate is formed by injection molding or press punching. It is also possible to use a grid formed by processing the material instead of the mesh.
  • the mesh or grid shape of the mesh may be, for example, a triangle or a hexagon other than the rectangle described in the above embodiment.
  • the outer shape of the vibration pad 8 may be, for example, a square, other polygons, or the like other than a substantially circular shape in plan view as described in the above-described embodiments and examples.
  • the use of a giant magnetostrictive element as the vibration conversion element is more desirable because vibration reproducibility can be improved, but is not limited to the giant magnetostrictive element. It is also possible to use an electromagnetic mechanical vibration conversion element that is a combination of a magnetic material and a coil.
  • FIG. 12 shows another example of the vibration pad.
  • the front surface 80a of the vibration pad 8 shown in FIG. 12 is a convex surface that is high near the center and low near the periphery.
  • the vibration pad 8 may have the form shown in any of FIGS. 1 and 3 to 8. In this way, the portion of the vibration pad 8 that comes into contact with the user's skin is changed to a convex curved surface or the shape of the part of the user's body to be touched.
  • the front surface 80a can be in close contact with the skin when the vibration pad 8 is pressed near the user's ear.
  • the area of the contact surface between the front surface 80a and the user's body increases, so that the vibration of the vibration pad 8 can be transmitted efficiently and the sound quality can be improved. Moreover, a user's feeling of use can be improved.
  • the mesh portion or the whole thereof is curved so that There is also an advantage that it is possible to complement the strength.
  • FIG. 13 shows another example of the vibration pad.
  • a planar cover 89 is attached to the front surface 80a of the vibration pad 8 shown in FIG.
  • the vibration pad 8 may have any of the forms shown in FIGS. 1, 3 to 8, and FIG.
  • the cover 89 may have elasticity.
  • the cover 89 is deformed according to the shape of the part of the user's body to be contacted.
  • the area of the contact surface between the cover 89 and the user's body increases, so that the vibration of the vibration pad 8 can be transmitted efficiently and the sound quality can be improved.
  • the user experience can be improved.
  • the cover 89 may be made of a material having elasticity such as rubber or resin !, and a bag made of a deformable soft material such as rubber or resin may contain gas, liquid, gel, etc. It may satisfy the following.
  • the cover 89 may be attached to the front surface 80a of the vibration pad 8 with an adhesive or the like, or may be formed by coating the front surface 80a of the vibration pad 8 with grease or the like.
  • the cover 89 preferably has a degree of elasticity and thickness that does not hinder transmission of sound from the front surface 80a of the vibration pad 8 to the outside, for example, the skin of the user. Note that, by using a giant magnetostrictive element having a large generated stress as the vibration converting element, even if an elastic cover 89 is provided, sound can be transmitted efficiently.
  • the cover 89 may be affixed with an adhesive having an adhesive strength that can be easily peeled off, sticky silicone rubber, or the like. Further, the cover 89 may be formed of adhesive silicon rubber or the like. For example, when an unspecified user uses the bone-conduction sound transmission device 30 such as installing headphones for viewing at a music CD store or the like, the cover 89 may be exchangeable each time the user uses it. In addition, metal allergy etc. may cause metal to come into direct contact with the skin. Even if a user has a situation such as being unable to perform the operation, a cover 89 made of silicone rubber or resin is affixed to the front surface 80a of the vibration pad 8, thereby The audio transmission device 30 can be used.
  • the cover 89 In order to prevent the sound leakage from the vibration node 8 from being increased by attaching the cover 89, the cover 89 has a space at the same position as the space provided in the vibration pad 8. You may have it. When the vibration pad 8 is formed in a mesh shape, the cover 89 may have a space at an arbitrary position.
  • FIG. 14 shows another example of the bone-conduction sound transmission device 30.
  • 14 (A) and 14 (B) includes a sponge 90, which is an example of an elastic member, in addition to the configuration of the bone-conduction sound transmission device 30 shown in FIG.
  • the vibration pad 8 When the vibration pad 8 is not pressed against an object to which vibration is transmitted, for example, the user's skin, the back surface 80b of the vibration pad 8 and the vibration rod 6 that transmits vibration of the giant magnetostrictive element 1 are caused by the sponge 90. Spaced apart. At this time, the vibration pad 8 is not in contact with the giant magnetostrictive element 1! /, So the vibration of the giant magnetostrictive element 1 is not transmitted to the vibration pad 8.
  • the sponge 90 contracts due to the pressure, and the back surface 80b of the vibration pad 8 and the vibration rod 6 come into contact with each other, and the giant magnetostrictive element The vibration of 1 is transmitted to the vibration pad 8.
  • the elastic member also has a state force in which the vibration rod 6 and the vibration pad 8 are separated by a pressure that does not make the user feel uncomfortable when the bone-conducted sound transmission device 30 is brought into contact with the user's skin. Any material may be used as long as it contracts to such an extent that it comes into contact.
  • the elastic member may be composed of rubber, resin, or other force, or rubber, resin, or other deformable soft material made of a material filled with gas, liquid, gel, etc. It may be a panel such as a plate panel or a coil panel.
  • FIG. 15 shows the configuration of a headphone that is an example of a sound transmission device including the bone-conduction sound transmission device 30.
  • Headphone 40 is a pair of headphones that transmits sound by bone conduction near the left and right ears.
  • a bone-conduction sound transmission device 30, a main body 42 having a circuit for inputting a signal to the bone-conduction sound transmission device 30, and an arm 44 that connects the left and right main bodies 42 are provided.
  • the bone-conduction sound transmission device 30 of the embodiment can be used for, for example, a transceiver, a hearing aid, an income, etc. in addition to the headphones. Even when the microphone and the bone-conduction sound transmission device 30 are provided close to each other, such as an income, the vibration pad 8 of the present embodiment reduces sound leakage. Can be reduced.
  • the present invention is not limited to a sound transmission device that transmits sound, but can also be applied to a vibration transmission device that converts an electric signal into vibration and transmits the vibration to the outside.
  • the present invention can be used in a vibration transmission device that converts an electric signal into vibration and transmits the vibration.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

Une pastille à vibrations (8) est constituée d'une plaque sensiblement circulaire, et elle porte des trous ou des ouvertures tels que des trous circulaires (81) pénétrant entre une face postérieure (80b) et une face antérieure (80a) et agencés concentriquement et/ou à équidistance. Au niveau sensiblement du centre de la face postérieure (80b) est jointe une barre à vibrations (6) de façon à transmettre à la face postérieure (80b) la vibration provenant d'un matériau à magnétostriction géante (1). Par ailleurs, la face antérieure (80a) est directement appliquée contre la peau à proximité notamment d'une oreille de l'utilisateur, et la vibration transmise à la face postérieure (80b) est transmise notamment au crâne de l'utilisateur par la face antérieure (80a), par l'intermédiaire de la peau.
PCT/JP2006/313254 2006-07-03 2006-07-03 Dispositif de transmission de vibrations, dispositif de transmission de la voix, et pastille à vibrations WO2008004273A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2008523555A JPWO2008004273A1 (ja) 2006-07-03 2006-07-03 振動伝達装置、音声伝達装置及び振動パッド
PCT/JP2006/313254 WO2008004273A1 (fr) 2006-07-03 2006-07-03 Dispositif de transmission de vibrations, dispositif de transmission de la voix, et pastille à vibrations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/313254 WO2008004273A1 (fr) 2006-07-03 2006-07-03 Dispositif de transmission de vibrations, dispositif de transmission de la voix, et pastille à vibrations

Publications (1)

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WO2008004273A1 true WO2008004273A1 (fr) 2008-01-10

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JP (1) JPWO2008004273A1 (fr)
WO (1) WO2008004273A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014083986A1 (fr) * 2012-11-27 2014-06-05 株式会社テムコジャパン Unité de haut-parleur à conduction osseuse
US9105261B2 (en) 2011-05-27 2015-08-11 Kyocera Corporation Sound outputting device
WO2015125566A1 (fr) * 2014-02-20 2015-08-27 株式会社テムコジャパン Unité haut-parleur à conduction osseuse
JP2018093516A (ja) * 2018-01-24 2018-06-14 ＢｏＣｏ株式会社 骨伝導を利用した聴音装置

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JPS6467097A (en) * 1987-09-07 1989-03-13 Meisei Electric Co Ltd Bone conduction speaker
JP2001258095A (ja) * 2000-03-09 2001-09-21 Material & Intelligent Device Kenkyusho:Kk 音響器具及び磁歪振動子の駆動方法
JP2005328125A (ja) * 2004-05-12 2005-11-24 Nec Tokin Corp イヤフォン
JP2005536140A (ja) * 2002-08-16 2005-11-24 ファイコム・コーポレーション 振動板を用いた超小型骨導スピーカーおよびこれを備えた移動電話機

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Publication number Priority date Publication date Assignee Title
JPS6467097A (en) * 1987-09-07 1989-03-13 Meisei Electric Co Ltd Bone conduction speaker
JP2001258095A (ja) * 2000-03-09 2001-09-21 Material & Intelligent Device Kenkyusho:Kk 音響器具及び磁歪振動子の駆動方法
JP2005536140A (ja) * 2002-08-16 2005-11-24 ファイコム・コーポレーション 振動板を用いた超小型骨導スピーカーおよびこれを備えた移動電話機
JP2005328125A (ja) * 2004-05-12 2005-11-24 Nec Tokin Corp イヤフォン

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9105261B2 (en) 2011-05-27 2015-08-11 Kyocera Corporation Sound outputting device
WO2014083986A1 (fr) * 2012-11-27 2014-06-05 株式会社テムコジャパン Unité de haut-parleur à conduction osseuse
EP2779684A4 (fr) * 2012-11-27 2015-08-12 Temco Japan Unité de haut-parleur à conduction osseuse
JPWO2014083986A1 (ja) * 2012-11-27 2017-01-05 株式会社テムコジャパン 骨伝導スピーカユニット
US9253563B2 (en) 2012-11-27 2016-02-02 Temco Japan Co., Ltd. Bone conduction speaker unit
US9532123B2 (en) 2014-02-20 2016-12-27 Temco Japan Co., Ltd. Bone conduction speaker unit
TWI561092B (en) * 2014-02-20 2016-12-01 Temco Japan Bone conduction speaker unit
WO2015125566A1 (fr) * 2014-02-20 2015-08-27 株式会社テムコジャパン Unité haut-parleur à conduction osseuse
JPWO2015125566A1 (ja) * 2014-02-20 2017-03-30 株式会社テムコジャパン 骨伝導スピーカユニット
JP2018093516A (ja) * 2018-01-24 2018-06-14 ＢｏＣｏ株式会社 骨伝導を利用した聴音装置
CN111670581A (zh) * 2018-01-24 2020-09-15 ＢｏＣｏ株式会社 听音装置
KR20200111194A (ko) * 2018-01-24 2020-09-28 보코 가부시키가이샤 청음 장치
US11212610B2 (en) 2018-01-24 2021-12-28 Boco Inc. Hearing device
CN111670581B (zh) * 2018-01-24 2022-08-30 ＢｏＣｏ株式会社 听音装置
KR102482897B1 (ko) * 2018-01-24 2022-12-28 보코 가부시키가이샤 청음 장치

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