JP2007129384A - Bone conduction speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bone conduction speaker whose performance is improved greatly by increasing vibration efficiency of a vibrating member by a magnet and a coil. <P>SOLUTION: The bone conduction speaker comprises: a frame 110 whose upper surface is open; the magnet 130 arranged inside the frame 110; the coil 150 existing around the magnet 130; a pair of upper and lower vibrating members 160 that is connected to the upper portion of the coil 150, and is separated mutually by prescribed distance; a pair of films 170 arranged between the pair of upper and lower vibrating members 160 in a laminated shape; and a vibrating ring 180 that is interposed between the pair of films 170 for converting vibration occurring from the coil 150 to sound for amplification. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bone conduction speaker, and more particularly to a bone conduction speaker that can increase the vibration efficiency of a vibration member made of a magnet and a coil to further improve the performance of the speaker.

  Sound is usually transmitted by air conduction. The vibration of sound is transmitted to the eardrum in the ear. There are three ear ossicles in the ear, which are transmitted to the cochlea through the ear ossicles by the vibration of the eardrum. The cochlea is filled with lymph fluid, which is transmitted to the auditory nerve while the vibration of the lymph fluid is converted into an electrical signal. In this manner, the human brain recognizes sound.

  Bone conduction is the elimination of the process of vibration through the eardrum and ossicles in the mechanism of sound recognition. Send sound vibrations directly to the cochlea through the skull. Even a hearing-impaired person with abnormalities in the eardrum or ear ossicles can hear sound reliably through bone conduction if the cochlea or auditory nerve is normal. A speaker applying this principle is a so-called bone conduction speaker.

Japanese Patent Laid-Open No. 11-355871

  Various types of bone conduction speakers have been developed. Most bone conduction speakers consist of a yoke, a magnet, a coil, and a vibrating member. In addition, most vibration members have a problem in that vibration efficiency is generally low because a large number of flights are stacked on each other and current flow through the coil is limited. Of course, the low vibration efficiency as described above has a great adverse effect on improving the performance of the speaker.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a bone conduction speaker in which the vibration efficiency of a vibration member using a magnet and a coil is increased and the performance of the speaker is greatly improved.

  In order to achieve the above object, a bone conduction speaker of the present invention is connected to a frame having an open top surface, a magnet disposed inside the frame, a coil existing around the magnet, and an upper part of the coil. A pair of upper and lower vibrating members spaced apart from each other by a predetermined distance, a pair of films disposed between the pair of upper and lower vibrating members and disposed in a laminated manner, and interposed between the pair of films. The gist of the invention is that it includes a vibration ring that simultaneously converts the vibration generated from the coil into sound and amplifies it.

  According to the bone conduction speaker of the present invention, a pair of vibration members, a pair of films, and a vibration ring that are separated by a certain distance are coupled, and vibration generated from the coil is converted into sound and simultaneously amplified. And many members are connected through the vibration ring at the center of the vibration member. For this reason, when the upper vibration member and the lower vibration member are coupled together with the vibration ring interposed, the current vibration is generated radially from the central region toward the outer side. Therefore, the vibration is evenly transmitted to the entire area, so that the vibration efficiency is excellent and uniform, and the performance of the speaker is also improved. In addition, since the vibration ring is sandwiched and laminated between a pair of films, the vibration ring is moderately reinforced, and the vibration current between the vibration ring and the film moves from the central region toward the outside. The vibrations are generated radially and the vibration is evenly transmitted to the entire area.

  In the present invention, the pair of vibration members includes an upper vibration member and a lower vibration member, and the upper vibration member and the lower vibration member are coupled to each other at the center of the surfaces of the upper vibration member and the lower vibration member facing each other. When the coupling member is formed so as to protrude and the vibration ring is fixed to the pair of vibration members in a state sandwiched between the two coupling members, the pair of film and vibration ring are interposed via the vibration ring at the center of the vibration member. Are coupled together, and the upper vibration member and the lower vibration member are coupled together with the vibration ring interposed therebetween, and the current vibration is generated radially from the central region toward the outside. Therefore, the vibration is evenly transmitted to the entire area.

  In the present invention, the vibration ring includes a ring-shaped outer peripheral portion, a center fixing portion sandwiched between coupling members, and a spiral radial connecting portion that connects the outer peripheral portion and the center fixing portion. In this case, the vibration of the vibrating ring is efficiently converted into sound and the amplification is improved by the action of the spiral radial connecting portion and the space between the connecting portions.

  In the present invention, when at least a part of the outer peripheral portion of the pair of films and / or vibration rings is fixed to the inner periphery of the frame, the current vibration state moves from the central region toward the outer fixed portion. Radiation occurs toward the surface, and vibrations are evenly transmitted to the entire area.

  In the present invention, when a large number of through holes that can freely make the vibration in the vertical direction are formed around the lower vibration member, the vibration in the vertical direction of the vibration member is efficiently transmitted, and the vibration current state is the central region. To the outside direction from the center. Therefore, the vibration is evenly transmitted to the entire area.

  FIG. 1 is an exploded perspective view illustrating a bone conduction speaker according to the present invention, FIG. 2 is a combined sectional view illustrating a bone conduction speaker according to the present invention, and FIG. 3 is a sectional view illustrating a bone conduction speaker according to the present invention. FIG. 4 is an assembled perspective view illustrating a bone conduction speaker according to the present invention.

  As shown, the bone conduction speaker 100 according to the present invention includes a frame 110, a yoke 120, a magnet 130, a magnet flight 140, a coil 150, a pair of upper and lower vibration members 160, a pair of upper and lower films 170, a vibration ring 180, and a cushion ring 190. It is comprised including.

  The frame 110 is a case member formed in a bottomed cylindrical shape with an open top. The frame 110 can be formed of ordinary plastic or an equivalent thereof, and the material is not particularly limited.

  A bottomed cylindrical yoke 120 similar to that of the frame 110 is inserted and accommodated inside the frame 110. A groove 111 having a certain depth is formed at the upper opening end of the frame 110 so that a wiring or a coil for energizing a coil 150, which will be described later, can pass therethrough.

  In this example, a cylindrical magnet 130 is accommodated in the yoke 120, and the cylindrical yoke 120 and the cylindrical magnet 130 are arranged so as to be substantially concentric. The magnet 130 is a permanent magnet having a predetermined magnetism.

  A magnet flight 140 is attached to the upper surface of the magnet 130. The magnet flight 140 has the same diameter as that of the magnet 130 and has a disk shape with a slightly smaller thickness. The magnet flight 140 serves to strengthen the magnetism of the magnet 130.

  A coil 150 exists around the upper part of the magnet 130 and the magnet flight 140. The coil 150 is formed and arranged so as to cover a certain area above the magnet 130 and the magnet flight 140. The coil 150 functions to vibrate at a predetermined frequency according to the current intensity and the magnetic repulsive force of the magnet 130.

  A pair of upper and lower vibrating members 160 are coupled to the upper portion of the coil 150.

  The vibration member 160 includes an upper vibration member 161 and a lower vibration member 162. The upper vibration member 161 is made of a resin such as polyethylene and is formed in a disk shape having a diameter slightly smaller than that of the magnet 130. The lower vibration member 162 is also made of a resin such as polyethylene, and is formed in a disk shape having a diameter equal to or slightly larger than that of the coil 150. A coil 150 is fixed to the lower surface of the lower vibration member 162.

  In the pair of vibration members 160, coupling members 163 and 164 for coupling the upper vibration member 161 and the lower vibration member 162 are formed to protrude at the centers of the surfaces of the upper vibration member 161 and the lower vibration member 162 facing each other. Has been. The coupling member 163 of the upper vibration member 161 is formed with a protrusion 161a extended by a predetermined distance in the direction of the center lower portion thereof. The protrusion 161a is formed on the coupling member 164 of the lower vibration member 162. Inserted into and coupled to the through-hole 162a.

  Thereby, the upper vibration member 161 and the lower vibration member 162 are disposed on the coil 150 in a state of being separated by a predetermined distance in the vertical direction. In addition, since the distance between the upper vibration member 161 and the lower vibration member 162 is set in a state where the two coupling members 163 and 164 are joined together, the distance between the upper vibration member 161 and the lower vibration member 162 is 2 It becomes substantially equal to the sum total of the protruding dimensions of the two coupling members 163 and 164.

  In addition, a plurality of through holes 162b arranged in a circumferential direction are formed in a slightly inner portion around the lower vibration member 162, and vibration generated from the lower coil 150 is transmitted to the upper structure. To play a role. Further, the through-hole 162b can freely vibrate the lower vibration member 162 in the vertical direction. The upper vibration member 161 serves to transmit the vibration generated from the vibration ring 180 described below to the outside.

  Between the pair of upper and lower vibrating members 160, a pair of upper and lower films 170 arranged in a stacked manner are disposed.

  The pair of upper and lower films 170 is composed of an upper film 171 and a lower film 172. The upper film 171 and the lower film 172 are each formed from a resin material such as polyethylene. The pair of films 170 are interposed between the pair of vibration members 160. That is, the upper film 171 and the lower film 172 are interposed between the pair of vibration members 160.

  The pair of films 170 are fixed to the inner peripheral surface of the upper opening portion of the frame 110 serving as a case member with an adhesive or the like. In addition to transmission of vibration from the coil 150, external water, moisture, or other contamination sources are It serves to prevent penetration into the frame 110. In the upper film 171 and the lower film 172, through holes 171a and 172a are formed at the centers, respectively, so that the protrusions 161a of the upper vibration member 161 are penetrated.

  A vibration ring 180 is interposed between the pair of films 170 to simultaneously convert and amplify vibration generated from the coil 150 into sound.

  The vibrating ring 180 is formed by punching and forming a metal plate such as copper, for example. The vibration ring 180 includes a ring-shaped outer peripheral portion 183, a center fixing portion 184 sandwiched between the coupling members 163 and 164, and a plurality of (four in this example) connecting the outer peripheral portion 183 and the center fixing portion 184. It is comprised from the spiral radial connection part 185. FIG. A crescent-shaped through hole 181b is formed in a region surrounded by the connecting portion 185 and the outer peripheral portion 183.

  The vibration ring 180 is fixed to the pair of vibration members 160 in a state where the center fixing portion 184 at the substantially central portion is sandwiched between the coupling members 163 and 164 of the upper vibration member 161 and the lower vibration member 162.

  The pair of films 170 and / or the vibration ring 180 has an outer peripheral portion fixed to the inner periphery of the frame 110 with an adhesive or the like. In this case, the outer periphery of both the film 170 and the vibration ring 180 may be bonded and fixed to the frame 110, or the outer periphery of the vibration ring 180 may be bonded and fixed only to the frame 110 without bonding.

  The vibration ring 180 is interposed between a pair of films 170. The vibration ring 180 serves to convert and amplify vibration generated from the coil 150 into sound. Further, the vibration ring 180 can improve the amplification factor by forming the through hole 181b by the spiral connecting portion 185. In addition, a through hole 181a is formed in the center of the vibration ring 180 so that the protrusion 161a of the upper vibration member 161 can be coupled.

  A cushion ring 190 is attached to the upper surface of the vibration member 160. The cushion ring 190 is coupled to the upper surface of the upper vibration member 161 so that the bone conduction speaker 100 comes into soft contact with the human body.

  Based on the above configuration, the bone conduction speaker 100 according to the present invention operates as follows.

  First, a current signal corresponding to a predetermined sound is transmitted to the coil 150. Thereafter, the coil 150 vibrates at a predetermined frequency due to a change in magnet and current between the magnet 130 and the magnet flight 140. At this time, the vibration of the coil 150 is transmitted to the vibration ring 180 through the lower vibration member 162 attached to the upper portion of the coil 150. Then, the vibration ring 180 converts the vibration into sound, and at the same time, amplifies the vibration and transmits it to the upper vibration member 161. Subsequently, the upper vibration member 161 can transmit a predetermined sound to the skull of the human body through the cushion ring 190. Therefore, even a hearing-impaired person who has an abnormality in the eardrum or the ossicles in the skull can hear the sound reliably if the cochlea and the auditory nerve are normal.

  In the vibration member 160, vibration is formed by opening a large number of through holes 162 b in the lower vibration member 162, and at the same time the spiral through holes 181 b are formed in the vibration ring 180, the upper and lower vibrations are also formed. When the members 161 and 162 are joined together while the vibration ring 180 is interposed, a vibration phenomenon occurs radially from the central region toward the outside thereof. Therefore, the vibration is evenly transmitted to the entire area, so that the vibration efficiency is excellent and the sound becomes uniform. The pair of films 170 that wrap the vibration ring 180 not only play a role of vibration, but also serve to prevent water, moisture, and various contamination sources from penetrating into various structures inside the frame 110.

  As described above, according to the bone conduction speaker of the present invention, a pair of vibration members, a pair of films, and a vibration ring that are separated from each other by a certain distance are coupled to convert vibration generated from the coil into sound. Amplify. And many members are connected through the vibration ring at the center of the vibration member. For this reason, when the upper vibration member and the lower vibration member are coupled together with the vibration ring interposed, the current vibration is generated radially from the central region toward the outer side. Therefore, the vibration is evenly transmitted to the entire area, so that the vibration efficiency is excellent and uniform, and the performance of the speaker is also improved. In addition, since the vibration ring is sandwiched and laminated between a pair of films, the vibration ring is moderately reinforced, and the vibration current between the vibration ring and the film moves from the central region toward the outside. The vibrations are generated radially and the vibration is evenly transmitted to the entire area.

  The pair of vibration members includes an upper vibration member and a lower vibration member, and a coupling member for coupling the upper vibration member and the lower vibration member to the center of the surfaces of the upper vibration member and the lower vibration member facing each other. Since the vibration ring is fixed to the pair of vibration members in a state of being sandwiched between both coupling members, the pair of films and the vibration ring are connected via the vibration ring at the center of the vibration member, The upper vibration member and the lower vibration member are joined together with the vibration ring interposed therebetween, and the current vibration state is generated radially from the central region toward the outer side. Therefore, the vibration is evenly transmitted to the entire area.

  In addition, the vibration ring includes a ring-shaped outer peripheral portion, a center fixing portion sandwiched between the coupling members, and a spiral radial connecting portion that connects the outer peripheral portion and the center fixing portion. By virtue of the space between the connecting portion and the connecting portion, the vibration of the vibrating ring is efficiently converted into sound, and the amplification is improved.

  Further, since at least a part of the outer peripheral portion of the pair of films and / or the vibration ring is fixed to the inner periphery of the frame, the current vibration is radiated from the central region toward the outer fixed portion. And vibrations are evenly transmitted to the entire area.

  In addition, since many through holes are formed around the lower vibration member so that the vibration in the vertical direction can be freely made, the vibration in the vertical direction of the vibration member can be efficiently transmitted, and the vibration current state is shifted from the central region to the outside thereof. Radially occurs in the direction. Therefore, the vibration is evenly transmitted to the entire area.

1 is an exploded perspective view illustrating a bone conduction speaker according to the present invention. 1 is a cross-sectional view illustrating a bone conduction speaker according to the present invention. FIG. 3 is a cross-sectional operational view illustrating a bone conduction speaker according to the present invention. 1 is an assembled perspective view illustrating a bone conduction speaker according to the present invention.

Explanation of symbols

100: bone conduction speaker 110: frame 111: groove 120: yoke 130: magnet 140: magnet flight 150: coil 160: vibration member 161: upper vibration member 161a: protrusion 162: lower vibration members 162a, 162b: through-hole 163: coupling Member 164: Coupling member 170: Film 171: Upper film 172: Lower film 171a, 172a: Through hole 180: Vibration ring 181a, 181b: Through hole 182a: Through hole 183: Outer peripheral part 184: Center fixing part 185: Connecting part 190 : Cushion ring

Claims (5)

  A pair of upper and lower vibrating members coupled to the upper part of the coil and spaced apart from each other at a predetermined distance by a frame having an open top surface, a magnet disposed inside the frame, a coil existing around the magnet, and the upper part of the coil. A pair of films disposed between the pair of upper and lower vibrating members and arranged in a laminated manner, and a vibration that is interposed between the pair of films and that simultaneously converts and amplifies vibration generated from the coil A bone conduction speaker comprising a ring.   The pair of vibration members includes an upper vibration member and a lower vibration member, and a coupling member for coupling the upper vibration member and the lower vibration member protrudes from the center of the surfaces of the upper vibration member and the lower vibration member facing each other. The bone conduction speaker according to claim 1, wherein the vibration ring is formed and fixed to a pair of vibration members in a state of being sandwiched between both coupling members.   3. The bone according to claim 2, wherein the vibration ring includes a ring-shaped outer peripheral portion, a central fixing portion sandwiched between coupling members, and a spiral radial connecting portion that connects the outer peripheral portion and the central fixing portion. Conductive speaker.   The bone conduction speaker according to any one of claims 1 to 3, wherein at least a part of an outer peripheral portion of the pair of films and / or vibration rings is fixed to an inner periphery of the frame. The bone conduction speaker according to any one of claims 1 to 4, wherein a plurality of through holes are formed around the lower vibration member so that vibrations in the vertical direction can be freely made.

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