JP2006217450A - Speaker and electronic equipment, and apparatus using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker enabling the improvement of productivity, the improvement of a sound pressure level, a low-profile, weight reduction, and a low cost, and to provide electronic equipment and an apparatus using the same. <P>SOLUTION: In this speaker, a repulsion magnet is coupled to a main magnet at a side opposite to a yoke of the main magnet of a magnetic circuit in a direction where the main magnet repulses the repulsion magnet, and both the magnets are configured by guiding themselves by rings or caps made of a nonmagnetic body so as to avoid deviation caused in both the magnets, thus assembling the speaker with high accuracy. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a speaker, an electronic device, and an apparatus used for various acoustic devices and information communication devices.

  A conventional speaker will be described with reference to FIG.

  FIG. 13 is a sectional view of a conventional speaker.

  According to FIG. 13, the magnetized main magnet 1 is coupled to the inside of the yoke 3 to constitute a magnetic circuit 4.

  A repulsive magnet 2 magnetized in a direction repelling the main magnet 1 is provided on the opposite side of the magnetic circuit 4 where the main magnet 1 is coupled to the yoke 3.

  A frame 6 is coupled to the yoke 3 of the magnetic circuit 4, and a diaphragm 7 is coupled to the peripheral edge of the frame 6.

  A voice coil 8 is coupled to the diaphragm 7 and the voice coil 8 is inserted into the magnetic gap 5 of the magnetic circuit 4 to constitute a speaker.

  With this configuration, the magnetic flux density of the magnetic gap 5 can be concentrated by the action of the main magnet 1 and the repulsive magnet 2, and the sound pressure level of the speaker can be improved, and the thickness and weight can be reduced. Can do.

As prior art document information relating to the invention of this application, for example, Patent Document 1 is known.
JP 2004-343386 A

  In the above-described speaker, a repulsive magnetic circuit is configured by the main magnet 1 and the repulsive magnet 2 so that the sound pressure level of the speaker can be improved, and the thickness and weight can be reduced. I use it often.

  However, the structure of the repulsive magnetic circuit must be formed by adhering the repulsive magnet 2 in the direction of repelling the main magnet 1 in the manufacturing process, and the main part from the time when the adhesive is applied until the adhesive is cured. The magnet 1 and the repulsive magnet 2 had to be fixed, which required a very time-consuming and laborious process.

  If the fixing is insufficient, there is a risk that the main magnet 1 and the repellent pug net 2 may be displaced due to each other's repulsive magnetic force or may be detached.

  Therefore, the conventional speaker is excellent in terms of improving the sound pressure level, reducing the thickness and weight of the speaker, but its productivity has a problem that a time-consuming and time-consuming process is necessary. Met.

  The present invention solves the above-described problems, and provides an excellent speaker that can improve the sound pressure level, reduce the thickness, and reduce the weight of the speaker, and can improve productivity.

  In order to solve the above problems, the present invention has the following configuration.

  At least a yoke, a main magnet coupled to the inside of the yoke, and a magnetic circuit formed by coupling another repulsive magnet on the opposite side of the main magnet from the yoke in a direction repelling the magnet. A frame coupled to the yoke of the magnetic circuit, a diaphragm coupled to the outer periphery of the frame, and a voice coupled to the diaphragm and part of which is disposed in the magnetic gap of the magnetic circuit A speaker composed of a coil, wherein a ring or cap made of a non-magnetic material is coupled to the main magnet and repulsion magnet of the magnetic circuit, and the main magnet and repulsion magnet are guided by the ring or cap to constitute the speaker. It is a thing.

  With this configuration, the main magnet and the repulsive magnet do not deviate from each other, and the fixing time for bonding can be shortened, and the productivity can be improved.

  In addition, the sound pressure level of the speaker can be improved, and the thickness and weight can be maintained.

  As described above, according to the present invention, a ring or cap made of a non-magnetic material is coupled to a main magnet and a repulsion magnet of a magnetic circuit, and the main magnet and the repulsion magnet are guided by this ring or cap to constitute a speaker. Is.

  With this configuration, the main magnet and the repulsive magnet do not deviate from each other, and the fixing time for bonding can be shortened, and the productivity can be improved.

  In addition, the sound pressure level of the speaker can be improved, and the thickness and weight can be maintained.

  Therefore, its industrial value is very large.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same content, the description is abbreviate | omitted and demonstrated.

(Embodiment 1)
Hereinafter, the first to eleventh aspects of the present invention will be described using the first embodiment.

  1 to 10 are sectional views showing a speaker according to an embodiment of the present invention.

  As shown in FIG. 1, a magnetized main magnet 21 is coupled to a yoke 23, and another repulsive magnet 31 is disposed on the opposite side of the main magnet 21 from the yoke 23 in a direction repelling the magnet. Are connected.

  A ring or cap 32 made of a non-magnetic material is coupled to the outer periphery of the main magnet 21 and the repulsive magnet 31, and the main magnet 21 and the repulsive magnet 31 are guided by the ring or cap 32 so as not to be displaced. The magnetic circuit 24 is configured.

  A yoke 23 of the magnetic circuit 24 is coupled to a frame 26, and a diaphragm 27 is coupled to a peripheral portion of the frame 26. A voice coil 28 is coupled to the diaphragm 27, and the voice coil 28 is inserted into the magnetic gap 25 of the magnetic circuit 24 to constitute a speaker.

  By adopting this configuration, even when the overall height of the main magnet in only one direction of magnetization is reduced, the main magnet 21 and the repulsive magnet 31 that are different in the magnetization direction and repel each other are configured. By doing so, the leakage magnetic flux can be reduced, and even if the volume of the entire magnet is reduced, a magnetic flux density equal to or higher than that can be obtained. Therefore, by constructing a repulsive magnetic circuit and efficiently using the magnetic energy of the magnet, the sound pressure level of the speaker can be improved, and the speaker can be made thinner, lighter, and lower in cost. Can do.

  A ring 32 made of a non-magnetic material is coupled to the outer periphery of the main magnet 21 and the repulsive magnet 31, and the main magnet 21 and the repulsive magnet 31 are guided by the ring 32 so as not to be displaced. As a result, the fixing time for bonding can be shortened in a short time without causing bonding deviation, and significant productivity improvement can be realized.

  Therefore, improvement in quality and reliability and cost reduction can be realized.

  In addition, as shown in FIG. 2, the ring 32 may have a cap 32 shape as well as a ring shape.

  With this configuration, it is possible to prevent the repulsion magnet 31 from being lifted from the main magnet.

  As shown in FIG. 3, the magnetic circuit may be configured such that a plate 33 made of a magnetic material is coupled between the main magnet 21 and the repulsive magnet 31.

  With this configuration, by adding the plate 33 made of a magnetic material and concentrating the magnetic flux, the magnetic flux density can be increased and the sound pressure level of the speaker can be improved.

  Moreover, as shown in FIG. 4, it is good also as a structure which couple | bonded the plate 34 which consists of a magnetic body in the direction opposite to the coupling | bonding direction with the main magnet 21 of the repulsion magnet 31. FIG.

  With this configuration, the leakage magnetic flux to the outside can be reduced without releasing the magnetic flux due to the effect of the plate 34 made of a magnetic material.

  Further, the effect of the magnetic plate 32 can bring the operating point of the magnetic circuit 24 in a stable direction, and the demagnetization characteristics of the magnet can be improved even under low and high temperature environments. , Quality and reliability can be improved.

  Further, as shown in FIG. 5, the two configurations shown in FIGS. 3 and 4 may be performed simultaneously. With this configuration, it is possible to simultaneously improve the sound pressure level of the speaker and the quality and reliability.

  Furthermore, as a method of using the ring or cap 32, there are methods of use as shown in FIGS.

  That is, as shown in FIG. 6, the cap 32 can be positioned by bringing the outer peripheral portion of the plate 33 made of a magnetic material into contact with the outer peripheral portion of the repulsive magnet 31.

  This is configured such that the outer peripheral portion of the plate 33 made of a magnetic material is guided by the outer peripheral bent portion of the cap 32, while the repulsive magnet 31 is guided by contacting the inner peripheral end face of the cap 32.

  With this configuration, it is possible to achieve not only the prevention of adhesion deviation between the main magnet 21 and the repulsive magnet 31 but also the positioning with high accuracy.

  Accordingly, it is possible to significantly improve productivity and production accuracy, and it is possible to realize improvement in productivity, quality and reliability, and cost reduction.

  Further, as shown in FIGS. 7 to 9, a part of the ring or cap 32 may be coupled between the main magnet 21 and the repulsive magnet 31.

  In this case, as shown in FIG. 7, the outer peripheral bending portion of the cap 32 is guided by abutting against the outer peripheral portion of the main magnet 21, while the repulsive magnet 31 is a hollow donut-shaped one and the inner periphery of the cap 32 is used. The bent portion is configured to be guided by contacting the inner peripheral portion of the repulsive magnet 31.

  With this configuration, it is possible to achieve not only the prevention of adhesion deviation between the main magnet 21 and the repulsive magnet 31 but also the positioning with high accuracy.

  In addition, as described above, as shown in FIG. 8, detailed description is omitted, but the main magnet 21 and the repulsive magnet 31 in FIG.

  Furthermore, as shown in FIG. 9, not only the positioning of the main magnet 21 and the repulsive magnet 31 but also the positioning of the yoke 23 is achieved by extending the outer peripheral portion of the cap 32 and abutting and guiding the yoke 23. It can also be implemented.

  Further, the positioning with respect to the yoke 23 may be performed by inserting a part of the ring or cap 32 into a notch provided in the yoke 23 and positioning as shown in FIG.

  By adopting this configuration, the size of the magnetic gap 25 can be accurately ensured without using a jig such as a gap gauge that is usually used to accurately secure the size of the magnetic gap 25. Costs can be reduced by reducing the number of jigs such as gap gauges, and further improvement in productivity and higher accuracy can be realized.

  The configuration of the magnetic circuit has been described above. Next, these materials will be described.

  As the material for the plates 32 and 33 made of the above-described magnetic body, it is common to use a material made of a metal body such as an iron plate. Further, when a complicated shape is required, a resin in which a magnetic material is mixed can be formed by injection molding.

  Further, by using a material having a high saturation magnetic flux density such as permendur, it is possible to realize a larger magnetic flux density and to improve the sound pressure level of the speaker.

  Moreover, the material of the above-mentioned ring or cap is made of a non-magnetic material and has high heat resistance. With this configuration, the non-magnetic material can be used without reducing the magnetic energy of the magnet, and the heat-resistant material improves the heat-resistance reliability of the voice coil temperature rise when using the speaker. Can be made.

  As these materials, resin materials having high heat resistance, that is, resin materials such as PEN (polyethylene naphthalate), PET (polyethylene terephthalate), PBT (polybutylene terephthalate), and heat-resistant ABS (acrylonitrile butadiene styrene) are injection molded. It is preferable to obtain the film material by sheet molding. Further, it may be obtained by pressing or cutting a phenol resin material such as bakelite.

  Further, as a means for improving heat resistance, a silicon-based material may be used, or a powder filler such as ceramic or aluminum may be added to the resin material described above.

  Further, by winding a heat-resistant tape, it can be formed in a ring shape to obtain the same function as described above.

  Moreover, you may comprise the material of these rings or a cap with the material containing copper or a copper alloy, and the material containing aluminum or an aluminum alloy.

  Thus, by comprising from a non-magnetic metal body, it can also have a role as a short ring or a short cap from the electroconductivity similarly to a normal copper ring, copper cap, aluminum ring or aluminum cap. .

  Therefore, the eddy current generated in the vicinity of the magnetic gap can be short-circuited, and the increase of the inductance component at the high frequency can be suppressed, and the sound pressure level in the high frequency range of the speaker can be improved and the high frequency limit frequency can be increased. Can do. In addition, distortion due to eddy current can be reduced, and speaker distortion can be reduced.

(Embodiment 2)
The second aspect of the present invention will be described below with reference to the present invention.

  FIG. 11 is a cross-sectional view showing a main part of an electronic apparatus according to an embodiment of the present invention.

  In this embodiment, each of the speakers according to any one of claims 1 to 11 is mounted to constitute a mobile phone that is an electronic device.

  That is, a speaker 40, an electronic circuit 43, and a display unit 47 such as a liquid crystal are mounted on an outer case 48 to constitute a mobile phone 49 that is an electronic device.

  With this configuration, it is possible to improve the productivity, the sound pressure level, the thickness, the weight, and the cost of a mobile phone that is an electronic device.

  In this embodiment, an example in which a mobile phone is mounted as an electronic device has been described. However, the present embodiment is not limited to this, and an audio device such as a mini component or a video device such as a television may be used. That is, the present invention can be applied to all electronic devices equipped with speakers.

(Embodiment 3)
Hereinafter, the third aspect of the present invention will be described with reference to the thirteenth aspect of the present invention.

  FIG. 12 is a cross-sectional view of an automobile showing an apparatus according to an embodiment of the present invention.

  Each of the embodiments constitutes an automobile which is a device on which the speaker according to any one of claims 1 to 11 is mounted.

  That is, the speaker 40 is mounted on the rear tray of the automobile 50.

  With this configuration, it is possible to reduce the weight and cost of the automobile 50 as a device.

  In addition, although this Embodiment demonstrated the example mounted in the motor vehicle as an apparatus, it is not limited to this, A moving apparatus, such as a train and a ship, Furthermore, structures, such as a house, may be sufficient. In other words, the present invention can be applied to all devices that are equipped with speakers.

  The speaker, the electronic device, and the device according to the present invention are an electronic device such as an audiovisual device, an information communication device, a game device, or the like that requires improvement in productivity, improvement in sound pressure level, reduction in thickness and weight, and further, Applicable to devices such as automobiles.

Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the speaker in one embodiment of this invention Sectional drawing of the electronic device in one embodiment of this invention Sectional drawing of the apparatus in one embodiment of this invention Cross-sectional view of a conventional speaker

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnet 2 Repulsive magnet 3 Yoke 4 Magnetic circuit 5 Magnetic gap 6 Frame 7 Diaphragm 8 Voice coil 21 Main magnet 23 York 24 Magnetic circuit 25 Magnetic gap 26 Frame 27 Diaphragm 28 Voice coil 31 Repulsive magnet 32 Ring (cap)
33 Plate 34 Plate 40 Speaker 43 Electronic Circuit 47 Display Unit 48 Exterior Case 49 Mobile Phone 50 Automobile

Claims (13)

A magnetic circuit comprising at least a yoke, a main magnet coupled to the inside of the yoke, and another repulsive magnet coupled to the opposite side of the main magnet from the yoke in a direction repelling the main magnet. And a frame coupled to the yoke of the magnetic circuit, a diaphragm coupled to the outer periphery of the frame, and a portion coupled to the diaphragm, and a portion thereof being disposed in the magnetic gap of the magnetic circuit. A speaker comprising a voice coil, wherein a ring or cap made of a non-magnetic material is coupled to a main magnet and a repulsion magnet of the magnetic circuit, and the main magnet and the repulsion magnet are guided by the ring or cap. The speaker according to claim 1, wherein a plate made of a magnetic material is coupled between the main magnet and the repulsive magnet. The speaker according to claim 1 or 2, wherein a plate made of a magnetic material is coupled in a direction opposite to a coupling direction of the repulsive magnet with the main magnet. The speaker according to any one of claims 1 to 3, wherein a ring or a part of a cap is coupled between the main magnet and the repulsion magnet. The speaker according to any one of claims 1 to 4, wherein the ring or the cap guides the outer periphery of the magnet. The speaker according to any one of claims 1 to 5, wherein the ring or cap guides the inner periphery of the magnet. The speaker according to any one of claims 1 to 6, wherein a part of the ring or the cap is positioned in contact with the yoke. The speaker according to any one of claims 1 to 7, wherein a part of the ring or cap is inserted and positioned in a notch provided in the yoke. The speaker according to any one of claims 1 to 8, wherein a material of the ring or cap is a material having high heat resistance. The speaker according to any one of claims 1 to 9, wherein a material of the ring or cap is a material containing copper or a copper alloy. The speaker according to any one of claims 1 to 10, wherein a material of the ring or cap is a material containing aluminum or an aluminum alloy. The electronic device carrying the speaker as described in any one of Claims 1-11. An apparatus on which the speaker according to any one of claims 1 to 11 is mounted.

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