JP2005260537A - Speaker, module using the same, electronic equipment, and apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an excellent speaker which can stabilize a sound pressure frequency characteristic and enlarge a high pass limit frequency while improving a sound pressure level of the speaker. <P>SOLUTION: The inner peripheral part 27a and the outer peripheral part 27b of a voice coil 28 are covered with a diaphragm 27. In a connection part with the voice coil 28, a projection part 27c is formed on the opposite side of a connection side with the voice coil 28 so that a ring-like groove part is formed on the connection side in accordance with the shape of the voice coil 28. A part of the voice coil 28 is inserted into the ring-like groove part over a whole periphery so as to connect them. The projection part 27c and the diaphragm 27 are reinforced by reinforcing ribs 27e and 27f formed in a right angle direction with respect to the projection part 27c so as to constitute the speaker. Thus, shape rigidity of the connection part of the diaphragm is improved, the sound pressure frequency characteristic of the speaker is stabilized and the high pass limit frequency can be expanded. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to speakers and modules used in various acoustic devices and information communication devices, and electronic devices and devices such as mobile phones and game devices.

  A conventional technique will be described with reference to FIG.

  FIG. 6 is a sectional view of a conventional rectangular speaker, and FIG. 7 is a perspective view of the diaphragm. As shown in FIGS. 6 and 7, the magnetized magnet 1 is sandwiched between the upper plate 2 and the yoke 3 to constitute an inner magnet type magnetic circuit 4. A frame 6 is coupled to the yoke 3 of the magnetic circuit 4.

  A diaphragm 7 made of a resin film is coupled to the peripheral portion of the frame 6, a voice coil 8 is coupled to the diaphragm 7, and the voice coil 8 is fitted into the magnetic gap 5 of the magnetic circuit 4. Are connected.

  Here, the diaphragm 7 is formed of a single plate so as to cover the inner peripheral side 7 a and the outer peripheral side 7 b of the voice coil 8, and the connecting portion with the voice coil 8 depends on the shape of the voice coil 8. A projection 7c is formed on the side opposite to the coupling side so as to form a ring-shaped groove on the coupling side with the voice coil 8, and a part of the voice coil 8 is inserted into the ring-shaped groove over the entire circumference. Combining and configuring.

  An inclined surface is also formed on the outer peripheral portion 7b of the projection 7c to function as a diaphragm, and a suspension 7d is formed in a cross-section roll shape on the outer periphery so that the diaphragm 7 can freely vibrate.

  With this configuration, not only the inner peripheral portion 7a of the voice coil 8 but also the outer peripheral portion 7b can function as a diaphragm, so that the effective vibration area of the diaphragm 7 can be increased, and the sound pressure level is increased. Can be improved.

For example, Patent Document 1 and Patent Document 2 are known as prior art document information relating to the invention of this application.
JP-A-62-53600 Special table 2003-521185 gazette

  In the above-described speaker, not only the inner peripheral portion 7a of the voice coil 8 but also the outer peripheral portion 7b function as a diaphragm, so that the sound pressure level can be improved. And in order to improve the coupling | bonding strength of the diaphragm 7 and the voice coil 8, the projection part 7c is provided and the adhesive bond is carried out.

  However, the shape and rigidity of the inner peripheral portion 7a and the outer peripheral portion 7b of the protruding portion 7c into which a part of the voice coil 8 is inserted are reduced, so that the diaphragm 7 is accurate against the vertical vibration of the voice coil 8. It has a problem of not following. Therefore, there has been a problem that performance degradation occurs such as causing a peak or a dip on the sound pressure frequency characteristics of the speaker or lowering a high frequency limit frequency.

  An object of the present invention is to solve the above-described problems and to provide an excellent speaker capable of stabilizing the sound pressure frequency characteristic and expanding the high frequency limit frequency while improving the sound pressure level of the speaker. Is.

  In order to achieve the above object, the present invention has the following configuration.

  According to a first aspect of the present invention, there is provided a frame coupled to a magnetic circuit, a diaphragm coupled to an outer peripheral portion of the frame, and the diaphragm coupled to the diaphragm, and a part thereof being the magnetic circuit. A speaker is constituted by a voice coil arranged in the magnetic gap. And the said diaphragm is comprised with one board | plate material so that the inner peripheral part side and outer peripheral part side of the said voice coil may be covered, and the coupling | bond part with a voice coil is a coupling | bonding of a voice coil according to the shape of a voice coil. A protrusion is formed on the side opposite to the coupling side so as to form a ring-shaped groove on the side, and a part of the voice coil is inserted and joined to this ring-shaped groove over the entire circumference. The protrusion is reinforced by reinforcing ribs formed in a direction perpendicular to the protrusion.

  With this configuration, the shape rigidity of the joint of the diaphragm with the voice coil is increased, and vibration transmission from the voice coil to the diaphragm can be realized accurately, eliminating peaks and dips in the sound pressure frequency characteristics. it can. Therefore, it is possible to stabilize the sound pressure frequency characteristic of the speaker and extend the high frequency limit frequency while ensuring the improvement of the sound pressure level of the speaker.

  According to a second aspect of the present invention, the reinforcing ribs are formed on both the inner side and the outer side of the protruding portion to which the voice coil of the diaphragm is coupled. With this configuration, the shape rigidity of the coupling portion of the diaphragm with the voice coil can be further increased, and a more stable sound pressure frequency characteristic of the speaker can be realized.

  According to a third aspect of the present invention, a suspension portion is formed on the outer peripheral portion of the diaphragm. With this configuration, the vibration of the diaphragm can be performed more smoothly, and the FO of the speaker can be reduced and the band can be expanded.

  According to a fourth aspect of the present invention, the diaphragm is made of a resin material. With this configuration, the shape of the diaphragm can be easily formed.

  According to a fifth aspect of the present invention, the diaphragm is made of a sheet material. With this configuration, it is possible to reduce the weight of the diaphragm.

  According to a sixth aspect of the present invention, the voice coil is configured by providing a bobbin. With this configuration, the central portion of the winding of the voice coil can be arranged at a position where the magnetic flux density of the magnetic gap is high, and the sound pressure level of the speaker can be improved.

  According to the seventh aspect of the present invention, the voice coil has a shape of any one of a square shape, an elliptical shape, and a track shape. With this configuration, the speaker can be slimmed.

  According to an eighth aspect of the present invention, the shape of the diaphragm is any one of a square shape, an elliptical shape, and a track shape. With this configuration, the speaker can be slimmed.

  According to a ninth aspect of the present invention, a module is configured by combining any one of the loudspeakers according to the first to eighth aspects and an electronic circuit. With this configuration, a module in which a speaker and an electronic circuit are combined can be provided at a low cost.

  According to a tenth aspect of the present invention, an electronic device is configured by mounting any one of the speakers according to the first to eighth aspects. With this configuration, it is possible to stabilize the frequency characteristics of the electronic device.

  According to an eleventh aspect of the present invention, the apparatus is configured by mounting any one of the speakers according to the first to eighth aspects. With this configuration, the frequency characteristics of the device can be stabilized.

  As described above, according to the present invention, on the diaphragm constituted by one plate material, a ring-shaped groove is formed on the coupling side with the voice coil in accordance with the shape of the voice coil, and the protruding portion is formed on the opposite side to the coupling side. The speaker is constructed by inserting a part of the voice coil into this ring-shaped groove and joining it around the entire circumference, and then reinforcing the projection and diaphragm with reinforcement ribs formed perpendicular to the projection. It is a thing.

  With this configuration, the shape rigidity of the joint of the diaphragm with the voice coil is increased, and vibration transmission from the voice coil to the diaphragm can be realized accurately, eliminating peaks and dips in the sound pressure frequency characteristics. it can. Therefore, it is possible to stabilize the sound pressure frequency characteristic of the speaker and extend the high frequency limit frequency while ensuring the improvement of the sound pressure level of the speaker.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
Hereinafter, the first to eighth aspects of the present invention will be described with reference to the first embodiment. FIG. 1 is a cross-sectional view of a slim type speaker according to an embodiment of the present invention, and FIG. 2 is a perspective view of the diaphragm.

  As shown in FIGS. 1 and 2, a magnetized magnet 21 is sandwiched between an upper plate 22 and a yoke 23 to form an inner magnet type magnetic circuit 24. A frame 26 is coupled to the yoke 23 of the magnetic circuit 24. The outer periphery of the diaphragm 27 is bonded to the peripheral edge of the frame 26, and one end of the voice coil 28 is coupled to the diaphragm 27, and the opposite end of the voice coil 28 is fitted into the magnetic gap 25 of the magnetic circuit 24. It is configured to be connected to.

  Here, the diaphragm 27 is formed of a single plate so as to cover the inner peripheral portion 27 a and the outer peripheral portion 27 b of the voice coil 28, and the connecting portion with the voice coil 28 is in accordance with the shape of the voice coil 28. A protrusion 27c is formed on the side opposite to the coupling side so as to form a ring-shaped groove on the coupling side with the voice coil 28, and a part of the voice coil 28 is inserted into the ring-shaped groove 27c over the entire circumference. Combining and configuring.

  An inclined surface is also formed on the outer peripheral portion 27b of the projecting portion 27c to function as a diaphragm, and a suspension 27d is formed in a cross-section roll shape on the outer periphery so that the diaphragm 27 can freely vibrate. .

  Here, a reinforcing rib 27e is formed on the inner peripheral portion 27a of the protruding portion 27c, and a reinforcing rib 27f is formed on the outer peripheral portion 27b of the protruding portion 27c in a direction perpendicular to the protruding portion 27, respectively. 27 and the slopes on the inner and outer peripheries are combined to improve the shape rigidity.

  As the shape of the reinforcing ribs 27e and 27f, as shown in FIGS. 1 and 2, a substantially triangular pyramid shape that connects the protrusion 27c and the inner peripheral portion 27a and the outer peripheral portion 27b of the diaphragm 27, or a material thickness May be formed in a constant shape.

  These reinforcing ribs are desirably hollow and light in weight from the viewpoint of improving the sound pressure level of the speaker.

  With this configuration, not only the inner peripheral portion 27a of the voice coil 28 but also the outer peripheral portion 27b function as a diaphragm, and the shape rigidity is improved by the reinforcing ribs 27e and 27f. It is possible to stabilize the frequency characteristics and extend the high frequency limit frequency while expanding the vibration area and improving the sound pressure level.

  Further, as shown in claim 2, the reinforcing ribs are formed on both the inner side and the outer side of the projecting portion 27c of the diaphragm 27. However, the reinforcing ribs may be formed on either one of them. It is possible to set freely according to desired characteristics, such as forming more or less.

  Furthermore, as described in claim 3, a suspension 27d is formed on the outer peripheral portion of the diaphragm so that the vibration of the diaphragm is more smoothly carried out, thereby reducing the FO of the speaker and expanding the band.

  Further, as described in claims 4 and 5, the material of the diaphragm is made of a sheet-like resin material, whereby the diaphragm 27 is reduced in weight and its shape is easily obtained.

  Further, as described in claim 6, the voice coil 28 is provided with a bobbin so that the central portion of the winding of the voice coil 28 is arranged at a position where the magnetic flux density of the magnetic gap 25 is high so that the sound pressure level is high. Have gained.

  In the above-described embodiment, the shape of the voice coil 28 is square and the speaker is slimmed. Further, the diaphragm 27 is square and further slimmed.

  The shape of the voice coil 28 and the diaphragm 27 may be configured as a circular shape, and when slimming is desired, the shape may be configured not only as a rectangular shape but also as an elliptical shape or a track shape.

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

  FIG. 3 is a cross-sectional view of the speaker module according to the embodiment of the present invention. As shown in FIG. 3, the speaker module 50 is configured by integrating the speaker 30 and the electronic circuit 40 according to any one of claims 1 to 8.

  Here, as a configuration of the speaker module 50, the electronic component 42 is fixed and wired on the circuit board 41 to configure the electronic circuit 40. The electronic circuit 40 and the speaker 30 according to any one of claims 1 to 8 are integrally coupled to constitute a speaker module 50.

  The electronic circuit 40 includes at least an amplifier circuit for an audio signal supplied to the speaker. That is, a circuit for amplifying a signal-processed audio signal to a level necessary for outputting from the speaker is already integrated with the speaker and also has an internal wiring, so this speaker module is coupled. Sound output can be easily obtained with just this.

  In addition to the amplifier circuit, the electronic circuit 40 is a circuit required for communication such as a detection circuit, a modulation circuit, and a demodulation circuit, or a display means such as a liquid crystal if it is a communication device such as a mobile phone. In addition, various circuits such as a power supply circuit and a charging circuit can be included.

  By adopting this configuration, the speaker and electronic circuit, which were conventionally produced separately and supplied to the production base of electronic devices such as mobile phones through each inspection process and logistics process, are integrated into a module. As a result, it is possible to integrate the production process, the inspection process, and the distribution process, and to greatly reduce the cost.

  Therefore, the speaker module 50 in which the speaker 30 and the electronic circuit 40 are combined can be provided at a low cost.

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

  FIG. 4 is a cross-sectional view of a main part of a mobile phone which is an electronic apparatus according to an embodiment of the present invention. As shown in FIG. 4, a mobile phone 80 is configured by mounting any one of the speakers 30 according to claims 1 to 8.

  Here, as a configuration of the mobile phone 80, components such as a speaker 30, an electronic circuit 40, a display module 60 such as a liquid crystal, modules, and the like are mounted inside the exterior case 70 to constitute a main part of the mobile phone 80. doing.

  With this configuration, it is possible to stabilize the sound pressure frequency characteristic of an electronic device such as a mobile phone and to extend the high frequency limit frequency.

(Embodiment 4)
Hereinafter, the fourth aspect of the present invention will be described with reference to the eleventh aspect of the present invention.

  FIG. 5 shows a cross-sectional view of an automobile 90 which is an apparatus according to an embodiment of the present invention. As shown in FIG. 5, an automobile 90 is configured by incorporating the speaker 30 of the present invention into a rear tray or a front panel and using it as a part of car navigation or car audio.

  With this configuration, it is possible to stabilize the sound pressure frequency characteristics of an apparatus such as an automobile equipped with the speaker 30 and to extend the high-frequency limit frequency.

  A speaker, a speaker module, an electronic device, and an apparatus 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 stabilization of a sound pressure frequency characteristic and expansion of a high frequency limit frequency, and an automobile. It can be applied to such devices.

Sectional drawing of the speaker in one embodiment of this invention The perspective view of the diaphragm in one embodiment of the present invention Sectional drawing of the speaker module in one embodiment of this invention Sectional drawing of the principal part 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 A perspective view of a conventional diaphragm

Explanation of symbols

21 Magnet 22 Upper plate 23 Yoke 24 Magnetic circuit 25 Magnetic gap 26 Frame 27 Diaphragm 27a Diaphragm inner circumference 27b Diaphragm outer circumference 27c Diaphragm projection 27d Diaphragm suspension 27e Reinforcement rib 27f Reinforcement rib 28 Voice coil 30 Speaker 40 electronic circuit 41 circuit board 42 electronic component 50 speaker module 60 display module 70 exterior case 80 mobile phone 90 automobile

Claims (11)

A frame coupled to the magnetic circuit, 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 the magnetic gap of the magnetic circuit It is a speaker, The said diaphragm is comprised with one board | plate material so that the inner peripheral part side and outer peripheral part side of the said voice coil may be covered, and the coupling | bond part with the said voice coil respond | corresponds to the shape of the said voice coil. A protrusion is formed on the side opposite to the coupling side so that a ring-shaped groove is formed on the coupling side with the voice coil, and a part of the voice coil is inserted into the ring-shaped groove all around the coupling. The speaker and the diaphragm are reinforced by reinforcing ribs formed in a direction perpendicular to the protrusion. The speaker according to claim 1, wherein the reinforcing ribs are formed on both the inside and outside of the projection portion to which the voice coil of the diaphragm is coupled. The speaker according to claim 1 or 2, wherein a suspension portion is formed on an outer peripheral portion of the diaphragm. The speaker according to any one of claims 1 to 3, wherein the diaphragm is made of a resin material. The speaker according to any one of claims 1 to 4, wherein the diaphragm is made of a sheet material. 6. The speaker according to claim 1, wherein the voice coil is configured by providing a bobbin. The speaker according to any one of claims 1 to 6, wherein the voice coil has a shape of any one of a square shape, an elliptical shape, and a track shape. The loudspeaker according to any one of claims 1 to 7, wherein the diaphragm has a square shape, an elliptical shape, or a track shape. A module in which any one of the speakers according to claim 1 and an electronic circuit is coupled. An electronic device on which any one of the speakers according to claim 1 is mounted. An apparatus on which any one of the speakers according to claim 1 is mounted.

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