JP4496977B2 - Speaker and electronic apparatus and apparatus using the same - Google Patents

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 loudspeaker will be described with reference to FIG.

FIG. 5 shows a cross-sectional view of a conventional speaker.

According to FIG. 5 , 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 to provide an outer magnet type. 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.

A frame 6 is coupled to 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 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 applying the adhesive to curing 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 each other's repulsive magnetic force 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 is to solve the above problems, in which more Hakare to reduce the sound pressure level increased and leakage flux of the speaker provides excellent speaker improvement in productivity can be realized.

  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 lower plate of the main magnet, and a magnetic flux density in the magnetic gap at the center pole is improved. and repulsion magnets coupled in a direction in which the upper surface of the repulsion magnet, a magnetic circuit formed by coupling the second repulsive magnet in a direction repelling the repulsion magnet, a frame coupled to the magnetic circuit, the frame a diaphragm coupled to the outer peripheral portion of, while being coupled to the vibration plate, a speaker, a part is composed of a voice coil disposed in a magnetic gap of the magnetic circuit, and a portion of the center pole side A non-magnetic cap is formed to cover the side surface of the repulsion magnet and the top surface and side surface of the second repulsion magnet. It is obtained by constituting the bent portion a portion of the cap end face inward to form between the center pole and repulsion magnet of the lower plate.

With this configuration, the center pole, the repulsion magnet, and the second repulsion magnet are not displaced, and the fixing time in the case of bonding is short, and 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 the center pole, the repulsion magnet, and the second repulsion magnet of the lower plate of the magnetic circuit. A speaker is configured by guiding a repulsive magnet.

With this configuration, the center pole, the repulsion magnet, and the second repulsion magnet are not displaced, and the fixing time in the case of bonding is short, and 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 fifth aspects of the present invention will be described with reference to the first embodiment.

1 to 2 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 2 is disposed on the opposite side of the main magnet 21 from the lower plate 23.
2 are combined.

Then, the repulsion magnet 31 and the second repulsion magnet 31A are 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 center pole 23A . The magnetic circuit 24 is configured by guiding the outer peripheral portion so as not to deviate from the second repulsive magnet 31A .

  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, the repulsion magnet 31 and the second repulsion magnet 31A , and the center pole 23A and the repulsion magnet 31 are connected by the cap 32. It is possible to prevent the occurrence of adhesive displacement by guiding the structure so as not to deviate. Further, the floating of the center pole 23A, the repulsive magnet 31, and the second repulsive magnet 31A 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 .

Also, in FIG. 1, there a configuration that combines the plate 33 made of a magnetic material on the upper surface of the second repulsion magnet 31A.

  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 .

Also, operation of the shown to magnetic circuit 1 is, in the direction opposite to the coupling direction of the center pole 23A of lower plate 23 of the repulsion magnet 31, the second repulsive magnet 31A in a direction repelling the repelling magnet 31 and a magnetic structure further couples.

  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 .

2 (a) is a side view of the caps 32 accommodating the magnetic circuit component therein, FIG. 2 (b) shows a plan view seen from the lower side as well, respectively.

That is, at least, the repulsion magnet 31, a plate 33 made of magnetic material, with a configuration which holds bent part of caps 32 on the inside, the two or more magnetic circuit components, shift it without holding can do. In this case, as shown in FIG. 1, two repulsion magnet 31 and 31A, for use by repel each other, the deviation or, repulsive magnets 31 and 31A or to repel, can be successfully maintained, productivity The effect can be greatly improved.

These magnetic circuit components, a structure in which the holding is without deviating, as shown in FIG. 2, the magnetic circuit component is inserted fixed to the inside of the caps 32, a portion of the lower end portion of the caps 32 32a This can be realized by bending inwardly.

Furthermore, in addition to the contents described above, as shown in FIG. 2, a portion 32a of the caps 32, and between the center pole 23A and repulsion magnet 31 of the lower plate 23, the other part 32b, the center pole 23A If the configuration is coupled to the outer peripheral portion, both functions of holding the magnetic circuit components and guiding with 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.

The material of the plate 3 3 made of magnetic material described above, it is common to use the composed material of a metal material such as an iron plate. Furthermore, 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 non-magnetic material can be used without reducing the magnetic energy of the magnet, and the heat-resistant material ensures the heat-resistant reliability of the voice coil temperature rise when using the speaker. 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, the material of these caps, and material containing copper or a copper alloy may be constituted by a 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, an eddy current generated in the vicinity of the magnetic gap can be shorted to suppress an increase in the inductance component at a high frequency, and an improvement in the sound pressure level in the high frequency of the speaker and an 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)
Hereinafter, with reference to the second embodiment will be described the invention described in particular claim 6 of the present invention.

FIG. 3 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 5 .

As shown in FIG. 3 , 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.

Also, depending on the material of the caps, the expansion of the sound pressure level increased and the high-frequency-band limit frequency of the high frequency speakers, more can be realized a low distortion of the speaker by distortion reduction due to eddy currents.

  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)
The third aspect of the present invention will be described below with reference to the seventh embodiment.

FIG. 4 is a sectional view of an automobile showing an apparatus according to an embodiment of the present invention.

In this embodiment, an automobile as a device is configured by mounting the speaker according to any one of claims 1 to 5 .

  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, or a game device that requires improvement in productivity, improvement in sound pressure level, and reduction in leakage magnetic flux,
Furthermore, it can be applied to apparatuses such as automobiles.

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

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 Repulsion 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 portion 32b Ring (cap) guide portion 33 Plate 40 Speaker 41 Enclosure 42 Amplifier 43 Player 44 Mini component system 50 Automobile

Claims (7)

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 magnetic gap to the center pole of the lower plate A repulsion magnet coupled in a direction to improve the magnetic flux density inside, a magnetic circuit formed by coupling a second repulsion magnet in a direction repelling the repulsion magnet, and a magnetic circuit coupled to the magnetic circuit. A speaker comprising a frame, a diaphragm coupled to the outer periphery of the frame, and a voice coil coupled to the diaphragm and part of which is disposed in a magnetic gap of the magnetic circuit, A side surface of the repulsion magnet, an upper surface and a side surface of the second repulsion magnet, and a side surface of the center pole. Nonmagnetic cap is formed to cover the parts, configuration and the speaker to be formed between the portions are bent inward portion of the cap end face and the center pole of the lower plate the repulsion magnet. The speaker according to claim 1, wherein a plate made of a magnetic material is coupled to the upper surface of the second repulsive magnet. Speaker according to the material of the caps is, any one of claims 1 and 2, which is the material rich in heat resistance. Speaker according to the material of the caps is, any one of claims 1 and 2 is a material containing copper or a copper alloy. Speaker according to the material of the caps is, any one of claims 1 and 2 is a material containing aluminum or an aluminum alloy. The electronic device carrying the speaker as described in any one of Claims 1-5 . An apparatus on which the speaker according to any one of claims 1 to 5 is mounted.

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