JP4346944B2 - Speaker, speaker module using the same, and electronic device using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a speaker used in various acoustic devices and information communication devices, a speaker module using the speaker, and an electronic device using the speaker.
[0002]
[Prior art]
A conventional speaker will be described with reference to FIGS.
[0003]
FIG. 9 is a perspective view of a conventional diaphragm, and FIG. 10 is a sectional view of a speaker using the diaphragm.
[0004]
As shown in FIGS. 9 and 10, a track-shaped diaphragm 7 is formed by hot press molding a resin film sheet material.
[0005]
Similarly, one end of a track-shaped cylindrical voice coil 8 is coupled to the track-shaped diaphragm 7.
[0006]
A rectangular magnetic circuit 4 is configured by sandwiching a magnetized rod-like magnet 1 between an upper plate 2 and a lower plate 3. A rectangular frame 6 is coupled to the upper plate 2 of the rectangular magnetic circuit 4, and the outer periphery of the track-shaped diaphragm 7 is bonded to the inner peripheral edge of the rectangular frame 6. The lower part of the track-type voice coil 8 is coupled so as to fit into the magnetic gap 5.
[0007]
As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-176691
[Problems to be solved by the invention]
In the above-described speaker, the diaphragm 7 and the voice coil 8 have a track shape for slimming. However, since the track-type voice coil 8 has the parallel straight portions 8a, during the operation of the speaker, that is, when the voice coil 8 vibrates up and down, the straight portions 8a of the voice coil 8 have unnecessary resonance in the orthogonal direction 8b. Has occurred and has the problem of causing deterioration of characteristics.
[0010]
That is, in the linear portion 8a of the voice coil 8, a mode that expands or contracts in the orthogonal direction 8b is generated as an unnecessary resonance mode of the vertical vibration of the voice coil 8, and as a result, a dip or peak occurs in the frequency characteristics. Occurs and flat audio reproduction characteristics cannot be obtained.
[0011]
Therefore, an object of the present invention is to provide a speaker that can reduce the occurrence of unnecessary resonance in the orthogonal direction of a voice coil.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following configuration.
[0013]
According to a first aspect of the present invention includes a frame, this frame, a vibration plate made of a single sheet material whose outer peripheral portion is bonded, while being coupled to the vibration plate, is partially a speaker comprising a magnetic circuit voice coil tubular disposed in the magnetic gap of the diaphragm coupling portion of the voice coil, a ring shape having a straight portion, the diaphragm surrounded by the ring-shaped portion In the portion, a flat portion and a protruding portion are formed, and in this flat portion, unnecessary resonance in the orthogonal direction toward the inner and outer circumferences of the voice coil generated on the linear long side of the voice coil is reduced, and the protrusion This is a speaker in which unnecessary resonance of the diaphragm in the vertical direction that is the vibration direction of the voice coil is reduced. With this configuration, it is possible to reduce unnecessary resonance and to stabilize the frequency characteristics.
[0014]
According to the second aspect of the present invention, the protruding portion has a convex shape. With this configuration, it is possible to reduce unnecessary resonance and to stabilize the frequency characteristics.
[0015]
In the invention according to claim 3 of the present invention, the projecting portion has a concave shape. With this configuration, it is possible to reduce unnecessary resonance and to stabilize the frequency characteristics.
[0016]
According to a fourth aspect of the present invention, the flat portions and the protruding portions are alternately formed. By adopting this configuration, it is possible to reduce unnecessary resonance and to stabilize the frequency characteristics.
[0017]
In the invention according to claim 5 of the present invention, the projecting portion is configured by combining a convex shape and a concave shape. By adopting this configuration, it is possible to reduce unnecessary resonance and to stabilize the frequency characteristics.
[0018]
According to a sixth aspect of the present invention, the diaphragm is made of a resin material. With this configuration, the productivity of the diaphragm can be improved.
[0019]
According to a seventh aspect of the present invention, a guide is formed at the coupling portion of the diaphragm with the voice coil. With this configuration, it is possible to improve the coupling accuracy between the diaphragm and the voice coil at the time of assembling the speaker and to stabilize the frequency characteristics.
[0020]
According to an eighth aspect of the present invention, the guide is formed of at least one pin. With this configuration, the weight of the diaphragm guide can be reduced, and the sound pressure level can be improved.
[0021]
According to a ninth aspect of the present invention, the guide is formed by a groove into which a part of the voice coil is inserted. By adopting this configuration, an effect of reducing unnecessary resonance due to the groove is also added, and unnecessary resonance can be further reduced to achieve stabilization of frequency characteristics.
[0022]
According to a tenth aspect of the present invention, a loudspeaker module is configured by combining any one of the loudspeakers according to the first to ninth aspects and an electronic circuit. With this configuration, a speaker module in which a speaker and an electronic circuit are combined can be provided at low cost.
[0023]
According to an eleventh aspect of the present invention, an electronic apparatus is configured by mounting any one of the speakers according to the first to ninth aspects. With this configuration, an electronic device with stable frequency characteristics can be provided.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
Hereinafter, with reference to the first embodiment, in particular the claims of the present invention 1, 2, 4, 6, 7 for the invention described in our and 9 will be described.
[0025]
FIG. 1 is a perspective view of a diaphragm according to an embodiment of the present invention, and FIG. 2 is a sectional view of a speaker using the diaphragm.
[0026]
As shown in FIGS. 1 and 2, a track type by hot pressing a piece of sheet material of the resin film (the long sides are parallel, the short side is substantially semi-circular) constitutes the diaphragm 27 . Further, a guide 27a made of a groove for inserting the upper end of the voice coil 28 is provided on the lower surface side of the track-shaped diaphragm 27 and connected to the upper end of the cylindrical voice coil 28, and the diaphragm is inserted in the guide 27a. 27 and the voice coil 28 are bonded. The track-shaped diaphragm 27 can be formed by vacuum molding, pressure molding, resin injection molding, or the like, in addition to the above hot press molding. Further, as shown in FIG. 3, a track-shaped diaphragm 27A without a guide may be used.
[0027]
Further, the material is not limited to resin, and it can be made of a material such as paper or metal depending on the use or purpose of the speaker.
[0028]
Next, two rod-shaped magnets 21 magnetized as shown in FIG. 2 are sandwiched between two upper plates 22 and a lower plate 23 to form a rectangular magnetic circuit 24. A rectangular rectangular frame 26 is coupled to the upper plate 22 of the rectangular magnetic circuit 24, and the outer periphery of the track-shaped diaphragm 27 is bonded to the inner peripheral edge of the rectangular frame 26. The upper end of the track-type voice coil 28 for driving the track-shaped diaphragm 27 is coupled to the lower surface of the track-shaped diaphragm 27 as described above. The lower portion of the track-type voice coil 28 is disposed so as to fit in the magnetic gap 25 having a straight portion.
[0029]
With the above configuration, the coupling portion with the voice coil 28 to the track-shaped diaphragm 27 is a ring in which the long side 27b is linear and substantially parallel and the short side 27c is substantially semicircular as shown in FIG. The diaphragm portion 27d surrounded by the ring-shaped portion is provided with the flat portion 27e and the convex protrusion 27f alternately.
[0030]
According to this configuration, the presence of the flat portion 27e makes it difficult for unnecessary resonance to occur in the orthogonal direction 27g even if the linear long side 27b exists, and the presence of the protruding portion 27f causes the vertical direction to rise in the vertical direction. As a result, the frequency characteristics can be stabilized.
[0031]
Further, by configuring the diaphragm 27 with a resin sheet material, the productivity of the diaphragm 27 can be improved, and as a result, the productivity of the speaker can be improved.
[0032]
Further, by providing the guide 27a by the groove, the effect of reducing unnecessary resonance by the groove is also added, and unnecessary resonance can be further reduced, and further stabilization of the frequency characteristics can be realized.
[0033]
(Embodiment 2)
Hereinafter, the second and second embodiments of the present invention will be described with reference to the third, fifth and eighth aspects of the present invention.
[0034]
4, 5 and 6 are perspective views of the diaphragm according to the second embodiment of the present invention.
[0035]
Only the differences from the first embodiment will be described. With respect to the third aspect shown in FIG. 4, flat portions 27e and concave protrusions 27h are alternately provided in the guide 27a.
[0036]
With this configuration, unnecessary resonance can be reduced and frequency characteristics can be stabilized, and the overall height of the speaker can be reduced because the protrusion 27h has a concave shape.
[0037]
In the fifth aspect shown in FIG. 5, a planar portion 27 e and convex and concave projecting portions 27 f and 27 h are provided in a guide 27 a of the diaphragm 27.
[0038]
With this configuration, unnecessary resonance can be further reduced and frequency characteristics can be stabilized by the resonance dispersion effect of the two protrusions 27f and 27h having a convex shape and a concave shape.
[0039]
In the eighth aspect shown in FIG. 6, the guide 27 i for the voice coil 28 of the diaphragm 27 is configured in at least one pin shape.
[0040]
With this configuration, the voice coil 28 is subjected to position restriction by the pin-shaped guide 27i provided on the diaphragm 27, so that the weight of the guide 27i can be reduced and the sound pressure level can be improved. .
[0041]
(Embodiment 3)
Hereinafter, the invention according to the tenth aspect of the present invention will be described with reference to the third embodiment.
[0042]
FIG. 7 shows a cross-sectional view of the speaker module according to Embodiment 3 of the present invention.
[0043]
As shown in FIG. 7, the speaker module 50 is configured by integrating any one of the speakers 30 and the electronic circuit 40 according to claims 1 to 9 .
[0044]
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 the first to tenth aspects are integrally coupled to constitute a speaker module 50.
[0045]
The electronic circuit 40 includes at least an amplifying circuit for an audio signal supplied to the speaker 30. That is, since the circuit that amplifies the signal-processed audio signal to a level necessary for outputting from the speaker 30 is already integrated and the internal wiring is provided, the audio output can be easily obtained. it can.
[0046]
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.
[0047]
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, the production process, the inspection process, and the distribution process can be integrated, and the cost can be greatly reduced.
[0048]
Therefore, the speaker module 50 in which the speaker 30 and the electronic circuit 40 are combined can be provided at a low cost.
[0049]
(Embodiment 4)
Hereinafter, the fourth aspect of the present invention will be described with reference to the eleventh aspect of the present invention.
[0050]
FIG. 8 shows a cross-sectional view of a main part of an electronic apparatus according to Embodiment 4 of the present invention.
[0051]
As shown in FIG. 8, an electronic device 80 is configured by mounting any one of the speakers 30 according to claims 1 to 9 .
[0052]
Here, as a configuration of the electronic device 80, a cellular phone is configured by mounting components, such as a speaker 30, an electronic circuit 40, a display module 60 such as a liquid crystal, and the like inside the exterior case 70.
[0053]
With this configuration, an electronic device with stable frequency characteristics can be provided.
[0054]
【The invention's effect】
As described above, the speaker of the present invention has a frame, a diaphragm made of one sheet material whose outer peripheral portion is coupled to the frame, and the diaphragm coupled to the diaphragm, and a part of the diaphragm is magnetic. A speaker comprising a cylindrical voice coil arranged in a magnetic gap of an air circuit, wherein the diaphragm coupling portion of the voice coil is formed into a ring shape having a straight portion, and the diaphragm portion surrounded by the ring shape portion Forming a flat portion and a protruding portion to reduce unnecessary resonance in the orthogonal direction toward the inner and outer peripheries of the voice coil that occurs on the linear long side of the voice coil. The speaker is configured to reduce unnecessary resonance of the diaphragm in the vertical direction that is the vibration direction of the voice coil.
[0055]
By adopting this configuration, it is possible to reduce unnecessary resonance of the diaphragm and to stabilize the frequency characteristics.
[0056]
As described above, the present invention can provide an excellent speaker capable of improving the performance, and its industrial value is very large.
[Brief description of the drawings]
1 is a perspective view of a diaphragm according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of a speaker according to Embodiment 1 of the present invention. FIG. 3 is a perspective view of a diaphragm according to Embodiment 1 of the present invention. 4 is a perspective view of a diaphragm according to a second embodiment of the present invention. FIG. 5 is a perspective view of a diaphragm according to a second embodiment of the present invention. FIG. 6 is a perspective view of a diaphragm according to a second embodiment of the present invention. FIG. 7 is a cross-sectional view of a speaker module according to Embodiment 3 of the present invention. FIG. 8 is a cross-sectional view of electronic equipment according to Embodiment 4 of the present invention. Cross-sectional view of a conventional speaker [Explanation of symbols]
DESCRIPTION OF SYMBOLS 21 Magnet 22 Upper plate 23 Lower plate 24 Magnetic circuit 25 Magnetic gap 26 Frame 27 Diaphragm 28 Voice coil 30 Speaker 40 Electronic circuit 41 Circuit board 42 Electronic component 50 Speaker module 60 Display module 70 Exterior case 80 Electronic device

Claims (11)

A frame, this frame, a vibration plate made of a single sheet material whose outer peripheral portion is bonded, while being coupled to the vibration plate, tubular a part of which is disposed in the magnetic gap of the magnetic circuit The voice coil diaphragm part is a ring shape having a straight part, and the diaphragm part surrounded by the ring part is formed with a flat part and a protruding part. In this plane portion, the unnecessary resonance in the orthogonal direction toward the inner and outer periphery of the voice coil that occurs on the linear long side of the voice coil is reduced, and the vertical direction that is the vibration direction of the voice coil is reduced in the protruding portion. A speaker that reduces unnecessary resonance of the diaphragm.   The speaker according to claim 1, wherein the protruding portion has a convex shape.   The speaker according to claim 1, wherein the protruding portion has a concave shape.   The speaker according to any one of claims 1 to 3, wherein the flat portions and the protruding portions are alternately formed.   The speaker according to claim 1, wherein the protrusion is formed by combining a convex shape and a concave shape.   The speaker according to any one of claims 1 to 5, wherein the diaphragm is made of a resin material.   The speaker according to any one of claims 1 to 6, wherein a guide is formed at a coupling portion between the diaphragm and the voice coil.   The speaker according to claim 7, wherein the guide is formed of at least one pin.   8. The speaker according to claim 7, wherein the guide is formed by a groove into which a part of the voice coil is inserted.   A speaker module obtained by combining any one of the speakers according to claim 1 and an electronic circuit.   An electronic device on which any one of the speakers according to claim 1 is mounted.

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