Speaker unit and portable information terminal
A technology of loudspeaker and main body, applied in the direction of diaphragm structure, flat diaphragm, etc., can solve the problems of difficulty in achieving low distortion and high sound pressure, easily disordered coil vibration, and difficulty in obtaining sound pressure, etc., and achieve miniaturization. , to achieve high sound pressure, reduce the effect of the lowest resonance frequency
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Embodiment approach 1
[0043] refer to Figure 1 ~ Figure 3 The speaker unit of this embodiment has a coil 5 , a diaphragm 4 , a reinforcing sheet 7 , a reinforcing ring 8 , a base frame Fv, a bottom plate 1 v , an upper plate 11 v , a magnet 22 v , and a cover 6 .
[0044] The vibration plate 4 is a flexible film, for example, a PET (Polyethylene Terephthalate) film or a PEI (Polyether Imide) film with a thickness of 8 to 50 μm. In addition, the diaphragm 4 has a diaphragm piece 4 a which is a displaceable part and an outer frame part 41 which is a fixed part. Furthermore, the vibrating plate piece 4 a has a main body portion 43 and an edge portion 42 .
[0045] The main body part 43 is formed in a planar shape, and the figure 1 The coil 5V is mounted on the lower surface side of the middle.
[0046] The edge part 42 surrounds the outer periphery of the main body part 43, ie, the main body outer periphery 43a in planar view. Furthermore, the edge portion 42 is formed to bend in the vibration di...
Embodiment approach 2
[0090] refer to Figure 13 and 14 , The speaker unit of this embodiment has a coil 5h, a frame F, a bottom plate 1, an outer magnet 2, and an inner magnet 3.
[0091] Frame F and bottom plate 1 ( Figure 14 ) in the shape of an elongated box. The two outer magnets 2 and one inner magnet 3 extend in the longitudinal direction X on the bottom plate 1 at a predetermined distance from the vibration plate 4 . The inner magnet 3 is arranged between two outer magnets 2 . The upper part 21 and the lower part 22 of the outer magnet 2 are S poles and N poles, respectively, and the upper part 31 and lower part 32 of the inner magnet 3 are N poles and S poles, respectively. The bottom plate 1 is made of a ferromagnetic body. According to this structure, the magnetic flux generated by the outer magnet 2 and the inner magnet 3 is as follows: figure 2 The arrow C indicated by the arrow C becomes a ring.
[0092] The coil 5h is formed parallel to the vibration direction Q ( Figure 1...
Embodiment approach 3
[0096] refer to Figure 15 and Figure 16 The portable information terminal of this embodiment is a mobile phone, and has: an upper housing 101, a display portion 102, a sound emission hole 103, a hinge portion 104, a lower housing 105, operation buttons 106, number buttons 107, a display portion 111, an audio amplifier Sound hole 112, a plurality of loudspeaker units (in Figure 15 and Figure 16 not shown).
[0097] A loudspeaker unit is built in near the sound hole 103 as a receiver for generating a listening sound or the like. Further, another speaker unit is built in the vicinity of the sound emission hole 112 as a speaker for generating a ringing sound or the like. These two speaker units have the configuration of Embodiment 1 or 2 described above.
[0098] According to the present embodiment, since the speaker unit can be mounted in a more limited space, the portable information terminal can be miniaturized, thinned, and slimmed.
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