JP2006217451A - 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, reduction in leakage magnetic flux, 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 center pole of a lower plate of a magnetic circuit and configured by guiding itself by the center pole by using a ring or a cap made of a nonmagnetic body so as to avoid deviation between the center pole and the repulsion magnet, 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. 12 shows a cross-sectional view of a conventional speaker.

  According to FIG. 12, the magnetized main magnet 1 is coupled to the lower plate 3 having the center pole 3A, and the upper plate 2 is coupled to the opposite side of the main magnet 1 coupled to the lower plate 3. The magnetic circuit 4 is configured.

  A repulsive magnet 11 magnetized in a direction repelling the magnetic force of the main magnet 1 is provided at the upper end of the center pole 3A of the lower plate 3 of the magnetic circuit 4.

  The magnetic circuit 4 is coupled to a frame 6, and a diaphragm 7 is coupled to a peripheral portion 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 obtained from the repulsive magnet 11 in addition to the magnetic flux generated by the main magnet 1.

  Therefore, the magnetic flux density of the magnetic gap 5 can be concentrated by the action of the two magnets, the sound pressure level of the speaker can be improved, and the leakage magnetic flux toward the front surface of the speaker can be reduced.

As prior art document information relating to the invention of this application, for example, Patent Document 1 is known.
JP-A-3-83396

  In the above-described speaker, a repulsive magnetic circuit is constituted by the main magnet 1 and the repulsive magnet 11 so that the sound pressure level can be improved and the leakage magnetic flux can be reduced, and the magnetic energy of the magnet is used efficiently. is doing.

  However, the configuration of the repulsive magnetic circuit has to be formed by adhering the repulsive magnet 11 in the direction of repelling the main magnet 1 in the manufacturing process, and during the period from application of the adhesive to curing of the adhesive. The magnet 1 and the repulsive magnet 11 had to be fixed using a jig, 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 repulsive magnet 11 may be displaced due to the repulsive magnetic force of each other or may be detached.

  Therefore, although the conventional speaker is excellent in terms of improving the sound pressure level and reducing the leakage magnetic flux, the productivity has a problem that a very time-consuming and laborious process is required. .

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

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

  At least a lower plate having a center pole, a main magnet coupled to the lower plate, an upper plate coupled to the opposite side of the main magnet to the lower plate, and a repulsive magnet coupled to the center pole. A magnetic circuit, a frame coupled to 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 is formed by connecting a center pole and a repulsion magnet to a ring or cap made of a non-magnetic material to guide the center pole and the repulsion magnet.

  With this configuration, the center pole and the repulsion magnet are not displaced, and the fixing time in the case of bonding can be shortened, and the productivity can be improved.

  In addition, improvement of the sound pressure level of the speaker and reduction of leakage magnetic flux 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 center pole and a repulsion magnet of a lower plate of a magnetic circuit, and the center pole and the repulsion magnet are guided by this ring or cap. A speaker is constructed.

  With this configuration, the center pole and the repulsion magnet are not displaced, and the fixing time in the case of bonding can be shortened, and the productivity can be improved.

  In addition, improvement of the sound pressure level of the speaker and reduction of leakage magnetic flux 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 9 are drawings showing a speaker and its components according to an embodiment of the present invention.

  As shown in FIG. 1, a main magnet 21 is coupled to a lower plate 23 having a center pole 23A, and an upper plate 22 is coupled to the opposite side of the main magnet 21 to the lower plate 23.

  A repulsive magnet 31 is coupled to the upper end portion of the center pole 23A, and a cap 32 made of a non-magnetic material is coupled to the outer periphery of the center pole 23A and the repulsive magnet 31 so that the center pole 23A and the repulsive magnet 31 are not displaced. The magnetic circuit 24 is configured by guiding the part.

  A frame 26 is coupled to the upper plate 22 of the magnetic circuit 24, and a diaphragm 27 is coupled to the 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.

  With this configuration, a cap 32 made of a non-magnetic material is coupled to the outer periphery of the center pole 23A and the repulsion magnet 31, and the center pole 23A and the repulsion magnet 31 are guided by the cap 32 so as not to be displaced. By configuring as described above, it is possible to prevent the occurrence of adhesive displacement. Further, the floating of the center pole 23A and the repulsive magnet 31 can be prevented.

  And since the fixing time in the case of bonding | adhering can transfer to the following process, without waiting for complete hardening of an adhesive agent, it can be completed in a short time and can implement | achieve remarkable productivity improvement.

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

  Furthermore, improvement of the sound pressure level of the speaker and reduction of leakage magnetic flux can be maintained.

  Further, as shown in FIG. 2, the outer dimension of the repulsive magnet 31 is made smaller than the outer dimension of the center pole 23 </ b> A of the lower plate 23, and a through hole is provided at the center of the cap 32 without covering the cap 32. The outer peripheral portion of the repulsive magnet 31 may be guided by the inner peripheral portion of the through hole.

  With this configuration, the volume of the cap 32 can be reduced, and the cost can be reduced by reducing the material.

  Moreover, as shown in FIG. 3, it is good also as a structure which couple | bonded the plate 33 which consists of a magnetic body in the direction opposite to the coupling | bonding direction with the center pole 23A 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 33 made of a magnetic material.

  Further, the effect of the magnetic plate 33 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.

  Similarly, as shown in FIG. 4, the cap 32 may have a ring 32 shape as well as a cap shape.

  With this configuration, the volume of the ring 32 can be reduced, and the cost can be reduced by reducing the material. Furthermore, the ring 32 can be produced by a simple process, and the cost can be reduced.

  Further, as a method of using the ring or cap 32, there is a method of use as shown in FIG.

  That is, the main magnet 21 can be positioned by extending the outer peripheral portion of the cap 32 and contacting the inner peripheral portion of the main magnet 21.

  By adopting this configuration, not only the occurrence of the adhesive displacement between the center pole 23A and the repulsive magnet 31 but also the positioning of the main magnet 21 can be realized 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 FIG. 6, the magnetic circuit is configured such that the second repulsive magnet 31A is in a direction opposite to the direction in which the lower plate 23 of the repulsive magnet 31 is coupled to the center pole 23A and in a direction repelling the repellent magnet 31. It is also possible to adopt a configuration in which these are further combined.

  Thus, the magnetic flux density in the magnetic gap 25 can be further improved by using the two repulsive magnets 31 and 31A while repelling each other.

  Therefore, further improvement of the sound pressure level of the speaker and reduction of leakage magnetic flux can be realized.

  In addition, the effect of the cap 32 on joining the two repulsive magnets 31 and 31A without shifting becomes even greater.

  As shown in FIG. 7, the magnetic circuit may have a configuration in which a plate 34 made of a magnetic material is coupled between the two repulsive magnets 31 and 31 </ b> A in addition to the configuration of FIG. 6 described above.

  With this configuration, by adding the magnetic plate 34 to concentrate the magnetic flux and obtain a stable magnetic pole width, the magnetic flux density can be increased and the sound pressure level of the speaker can be further improved. At the same time, the magnetic flux density distribution in the magnetic gap 25 can be adjusted to a desired state, and the acoustic characteristics of the speaker can be adjusted.

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

  FIG. 9A shows a side view of a ring or cap 32 in which magnetic circuit components are housed, and FIG. 9B shows a plan view similarly seen from below.

  That is, at least two magnetic circuit components are not displaced by adopting a configuration in which at least a repulsive magnet 31 and a plate 33 made of a magnetic material are held by bending a part of a ring or cap 32 inward. Can be held. In this case, as shown in FIG. 8, when the two repulsive magnets 31 and 31A are used by repelling each other, the repelling magnets 31 and 31A that are displaced or repelled can be held well. The effect is great, for example, productivity can be remarkably improved.

  As a configuration for holding these magnetic circuit components without shifting, as shown in FIG. 9, the magnetic circuit components are inserted and fixed inside the ring or cap 32, and one end of the lower end of the ring or cap 32 is secured. This can be realized by bending the portion 32a inward.

  Further, in addition to the above contents, as shown in FIG. 9, a part 32a of the ring or cap 32 is provided between the center pole 23A of the lower plate 23 and the repulsion magnet 31, and the other part 32b is provided as a center pole. With the configuration coupled to the outer peripheral portion of 23A, both functions of holding the magnetic circuit components and guiding the center pole 23A can be achieved.

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

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

  As the material of the plates 33 and 34 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.

  The material of the ring or cap 32 described above is made of a non-magnetic material and has a high heat resistance. With this configuration, the use of a non-magnetic material allows the magnet to be used without reducing the magnetic energy of the magnet. Can be improved.

  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 improvement of the sound pressure level in the high frequency of the speaker and the expansion of the high frequency limit frequency can be realized. 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. 10 is an external view of an electronic apparatus according to an embodiment of the present invention.

  In this embodiment, an audio minicomponent system, which is an electronic device, is configured by mounting the speaker according to any one of claims 1 to 11.

  As shown in FIG. 10, the speaker 40 of the present invention is incorporated in an enclosure 41 to constitute a speaker system, and an amplifier 42 which is an amplifying means for an electric signal input to the speaker, and a source input to the amplifier An audio mini-component system 44, which is an electronic device, is configured by including a player 43 for output.

  With this configuration, it is possible to improve the productivity, quality, and reliability of the electronic device, and to reduce the cost.

  Furthermore, the sound pressure level can be improved and the leakage magnetic flux can be reduced.

  Further, depending on the material of the ring or cap, it is possible to improve the sound pressure level in the high frequency range of the speaker, expand the high frequency limit frequency, and further reduce the distortion of the speaker by reducing distortion due to eddy current.

  In this embodiment, an example in which an electronic device is mounted on an audio minicomponent system has been described. However, the present invention is not limited to this, and may be a video device such as a television set or a mobile communication device. 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. 11 is a 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 improve productivity, improve quality and reliability, and reduce costs of the automobile 50 as a device.

  Furthermore, the sound pressure level can be improved and the leakage magnetic flux can be reduced.

  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 an improvement in productivity, an improvement in sound pressure level, and a reduction in leakage magnetic flux. 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 (A) Side view of ring or cap containing magnetic circuit components therein, (b) Plan view seen from below ring or cap 1 is an external view of an electronic device according to an embodiment of the present 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 Main magnet 2 Upper plate 3 Lower plate 3A Center pole 4 Magnetic circuit 5 Magnetic gap 6 Frame 7 Diaphragm 8 Voice coil 11 Repulsive magnet 21 Main magnet 22 Upper plate 23 Lower plate 23A Center pole 24 Magnetic circuit 25 Magnetic gap 26 Frame 27 Diaphragm 28 Voice coil 31 Repellent magnet 31A Repellent magnet 32 Ring (cap)
32a Ring (cap) bent part 32b Ring (cap) guide part 33 Plate 34 Plate 40 Speaker 41 Enclosure 42 Amplifier 43 Player 44 Mini component system 50 Automobile

Claims (13)

At least a lower plate having a center pole, a main magnet coupled to the lower plate, an upper plate coupled to the opposite side of the main magnet to the lower plate, and coupled to the center pole of the lower plate A magnetic circuit composed of a repulsive magnet, a frame coupled to the magnetic circuit, a diaphragm coupled to the outer periphery of the frame, and a part coupled to the diaphragm, part of which is part of the magnetic circuit. A speaker comprising a voice coil disposed in a magnetic gap, wherein a ring or cap made of a non-magnetic material is coupled to the center pole and the repulsive magnet of the lower plate, and the lower part is A guide that guides the center pole of the plate and the repulsion magnet. Over mosquitoes. The speaker according to claim 1, wherein an outer dimension of the repulsion magnet is smaller than an outer dimension of the center pole of the lower plate. 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 with the center pole of the lower plate of the repulsive magnet. The speaker according to any one of claims 1 to 3, wherein a part of the ring or the cap is brought into contact with the main magnet to position the main magnet. 5. The second repulsion magnet is further coupled in a direction opposite to the coupling direction with the center pole of the lower plate of the repulsion magnet in a direction repelling the repulsion magnet. 6. Speaker. The speaker according to claim 5, wherein a plate made of a magnetic material is coupled between two repulsive magnets. The speaker according to any one of claims 3 to 6, wherein at least a repulsive magnet and a plate made of a magnetic material are held by bending a ring or a part of a cap inward. The speaker according to claim 7, wherein a part of the ring or the cap is coupled between the center pole of the lower plate and the repulsion magnet, and the outer periphery of the center pole. 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. The apparatus which mounts the speaker as described in any one of Claims 1-11.

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