JPH10322795A - Speaker device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a large amplitude amount within limited space and diameter size of a speaker device and to obtain low distortion and high linearity performance by turning a damper shape to a large roll shape like a diaphragm edge part. SOLUTION: Since a damper 10 composed of one roll part 10a of a large curvature close to the shape of the edge part 8e of a diaphragm 8 is provided on the inner side of a frame 4, the amplitude amount is sufficiently obtained without limiting the shape of this speaker device. Also, by turning it to the shape close to the edge part 8e of the diaphragm 8, since a vibration mode at the high input becomes closer to the same operation as the diaphragm 8, an amplitude operation is smoothed and the speaker device of high input resistance provided with the low distortion and high linearity performance is made possible. Also, a small hole 11 is provided on the upper part of the damper 10, air resistance is suppressed, the width of the material selection of the damper 10 is widened and a resin material is made usable as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a speaker device used for various audio equipment.

[0002]

2. Description of the Related Art In recent years, digital signal processing technology has dramatically advanced and the quality of electric signals supplied to a speaker device has been greatly improved. Accordingly, development of a speaker device capable of reproducing high-quality sound has been strongly desired. It is rare.

A conventional speaker device will be described with reference to FIG. FIG. 10 is a side sectional view of the above-mentioned conventional speaker device. In the figure, 1 is a bottom plate having a center pole, 2 is a ring-shaped magnet fixed on the bottom plate 1, and 3 is a top plate fixed on the upper surface of the magnet 2. Reference numeral 4 denotes a frame connected to a magnetic circuit formed by the bottom plate 1, the ring-shaped magnet 2, and the top plate 3. Reference numeral 5 denotes a voice coil bobbin held in a magnetic gap formed by the inner periphery of the top plate 3 and the outer peripheral surface of the center pole of the bottom plate 1. Reference numeral 6 denotes a voice coil bobbin extending from the voice coil wire 5. is there.

Reference numeral 7 denotes a ring-shaped damper having a plurality of small annular corrugated portions 7a fixed between the voice coil bobbin 6 and the frame 4. Reference numeral 8 denotes an inner periphery fixed to the vicinity of an end of the voice coil bobbin 7. A diaphragm main body 8a, a first flat portion 8b fixed to the outer periphery of the diaphragm main body 8a, a curved portion 8c having a larger curvature than the corrugation portion 7a of the damper 7, and a second fixed to the frame 4. The diaphragm 8 includes a flat portion 8d and an edge portion 8e. A dust cap 9 is attached to the upper surface of the center of the diaphragm 8.

[0005] The operation of the conventional loudspeaker device configured as described above will be described below. First, when an electric signal is applied to the wire 5 of the voice coil of the speaker device, a driving force is generated in the magnetic circuit. This driving force is transmitted to the voice coil bobbin 6, and the diaphragm 8 fixed to the tip thereof
Vibrates to emit a sound corresponding to the vibration.
The area of the damper 7 that supports the voice coil bobbin 6 is increased to increase the amplitude during the vibration, and the corrugation of the damper 7 is increased to facilitate the amplitude, thereby maintaining the performance and reliability.

[0006]

However, in the above-mentioned conventional configuration, in order to improve the amplitude and the low-frequency reproduction limit, the area of the damper 7 fixed inside the frame 4 is increased to provide more corrugations. It is necessary to limit the expansion of the area occupied by the damper 7 in the limited space and diameter, and the smaller the area where the damper 7 oscillates, the lower the amplitude amount and the lower frequency reproduction limit,
This has also led to a decrease in the input resistance, making it extremely difficult to secure performance and maintain reliability at high input.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and has a structure capable of withstanding a high input and a high output sound while achieving a sufficient amplitude amount and expansion of a low-frequency reproduction limit even in a limited space and aperture size. It is an object of the present invention to provide a speaker device having excellent acoustic characteristics capable of maintaining a pressure level and achieving high linearity performance with low distortion.

[0008]

In order to solve the above-mentioned problems, a speaker device according to the present invention comprises a magnetic circuit, a frame connected to the magnetic circuit, an outer periphery fixed to the frame, and an inner periphery defined as above. It has an edge portion connected to the bobbin of the voice coil fitted into the magnetic gap of the magnetic circuit and a diaphragm composed of a diaphragm main body, and one roll portion whose inner periphery is coupled to the bobbin and whose outer periphery is coupled to the frame. A speaker device that is configured with a damper and has excellent acoustic characteristics capable of realizing high linearity performance with low distortion while securing a large amplitude amount in a limited space and bore size. It is.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION
A magnetic circuit, a frame coupled to the magnetic circuit, and an edge portion coupled to a bobbin of a voice coil having an outer periphery fixed to the frame and an inner periphery fitted into a magnetic gap of the magnetic circuit, and a diaphragm body. A diaphragm,
The inner periphery is configured with a damper having one roll portion coupled to the bobbin and the outer periphery is coupled to the frame, even in a limited space and diameter size,
An object of the present invention is to provide a speaker device having excellent acoustic characteristics capable of realizing high linearity performance with low distortion while securing a large amplitude amount.

According to a second aspect of the present invention, there is provided a damper according to the first aspect of the present invention, wherein the inner periphery of the damper is provided with a bonding portion that hangs down to the vicinity of the wire loop of the voice coil. Is improved, the holding position at the time of laminating the damper is facilitated, and the assembling property is improved.

The third aspect of the present invention is the first aspect of the present invention.
The inner periphery of the damper described in (1) is provided with a bonding portion having a smaller curvature than the roll portion, which helps to maintain the shape of the outer large roll-shaped damper generated at the time of high input, and further improves the linearity of the amplitude. Things.

The invention according to claim 4 of the present invention is the invention according to claim 1.
Or, a small hole is provided at an appropriate interval in the roll portion of the damper described in 2 or 3, which suppresses air resistance to the damper at the time of vibration of the damper, and has a range of selection of a material of the damper that enables smooth vibration. And the use of a resin-based material having extremely poor air permeability is also possible.

According to a fifth aspect of the present invention, there is provided a magnetic circuit, a frame having an elongated upper surface connected to the magnetic circuit, an outer periphery fixed to the frame, and an inner periphery formed by the magnetic circuit. A diaphragm composed of an edge portion and a diaphragm main body connected to the bobbin of the voice coil to be fitted in the gap, and an elongated type formed in a roll shape having an inner periphery coupled to the bobbin and an outer periphery coupled to the frame. The roll-like form on the long diameter side of the damper formed into one roll is formed of an inner roll portion, an outer roll portion, and a middle roll portion wider than these. Yes, even in elongated speaker devices such as elliptical speakers, a large amount of amplitude is ensured in a limited space and aperture size, and low distortion and high linearity acoustic characteristics. Those that can provide a speaker apparatus having.

An embodiment of the speaker device according to the present invention will be described below with reference to FIGS. In the description, the same parts as those of the related art are denoted by the same reference numerals, and the description will be omitted.

(Embodiment 1) FIG. 1 is a side sectional view of an embodiment of a speaker device according to the present invention, FIG. 2 is a perspective view of a damper as an essential part thereof, and FIG. It is a characteristic and a 2nd harmonic distortion characteristic figure.

Referring to FIG. 1, reference numeral 10 denotes a ring-shaped damper fixed between the voice coil bobbin 6 and the frame 4, which has one roll portion 10a having an extremely large curvature similar to the curved portion 8c of the edge portion 8e. It is. Reference numeral 11 denotes small holes provided at appropriate intervals near the top of the roll portion 10a.

In the present embodiment, the shape of the speaker 4 is restricted by forming the damper 10 inside the frame 4 as a single roll portion 10a having a large curvature close to the shape of the edge 8e of the diaphragm 8. Since the amplitude can be sufficiently obtained without receiving the vibration and the shape approximates to the edge portion 8e of the diaphragm 8, the amplitude mode at the time of high input becomes close to the same operation as the diaphragm 8.
The amplitude operation is also smooth, and a high input resistance speaker device having low distortion and high linearity performance can be provided.

In the present embodiment, the air resistance is suppressed by the small holes 11 provided on the upper part of the large roll-shaped damper 10, so that the material selection of the damper 10 is widened and a resin-based material is used. Although this is possible, it may not be required depending on the selected material and the like.

FIG. 3 shows the sound pressure frequency characteristic and the second harmonic distortion characteristic of the conventional speaker device and the speaker device of the present embodiment. Sound pressure frequency characteristics 1
5, the sound pressure frequency characteristic 14 was higher than that of the sound pressure frequency characteristic 5, and it was confirmed that the extended low frequency reproduction was possible even in the low sound range of the sound pressure frequency characteristic. Further, the second harmonic distortion characteristic of the present embodiment (1) is higher than that of the prior art (shown as 17).
6 (shown as 6), it was confirmed that low distortion was realized and high linearity was obtained.

(Embodiment 2) FIG. 4 is a side sectional view of another embodiment of the loudspeaker according to the present invention. Only differences from Embodiment 1 will be described with reference to FIG. The shape of the joint of the voice coil bobbin 6 of the large roll-shaped damper 10 approximated to
Has a bonding portion 12 having a shape that hangs down to near.

As described above, the shape of the joint supporting the voice coil bobbin 6 is supported by the bonding portion 12 having a shape that hangs down to the vicinity of the voice coil wire 5, thereby suppressing the fluctuation of the amplitude at the time of high input. In addition, the linearity is improved, and the bonding portion 12 of the damper 10 serves as a guide, so that the bonding position at the time of bonding the damper 10 can be easily maintained, and the assemblability can be improved.

(Embodiment 3) FIG. 5 is a side sectional view of another embodiment of the speaker device of the present invention. Only the differences between this embodiment and the prior art will be described with reference to FIG. The shape of the joint portion of the damper 10 with the voice coil bobbin 6 is such that a spring-like bonded portion 13 formed by a roll smaller than the roll on the outer peripheral portion is provided and joined to the voice coil bobbin 6.

As described above, by forming the bonding portion for supporting the voice coil bobbin 6 by the bonding portion 13 formed by a roll smaller than the roll on the outer peripheral portion, it is generated at the roll portion having the larger outer peripheral portion at the time of high input. This suppresses an irritating vibration form, helps to maintain the shape of the damper 10, and further improves the linearity of the amplitude.

In each of the above embodiments, the speaker device having a circular cross-sectional side view and description has been described.
The same effect can be obtained in a speaker device having an oval or elliptical shape.

(Embodiment 4) FIG. 6 is a top view of an elliptical speaker which is a speaker device according to an embodiment of the present invention, and FIG. 7 is a side sectional view showing a section in the minor axis and major axis directions. FIG. 8 is a plan view of a damper, which is the main part, and FIG.
FIG. 3 is a diagram showing the same sound pressure frequency characteristic and second harmonic distortion characteristic.
According to the drawing, reference numeral 19 denotes an elliptical damper formed of one large roll shape, which is fixed to the voice coil bobbin 6, 20a is a short-diameter side roll portion forming the elliptical roll damper 19, and 20b is In the long diameter side roll part,
The inner roll part 21, the middle roll part 22 and the outer roll part 23 are formed.

Incidentally, as is apparent from the figure, the middle roll portion 2
Numeral 2 is wider than the inner roll portion 21 and the outer roll portion 23 and is formed with a larger curvature. When the damper of the elongated speaker device having the short diameter and the long diameter is formed in one roll shape as in the present embodiment. The distortion is reduced by the middle roll portion 22.

Reference numeral 4 denotes an upper elliptical frame, and reference numeral 8 denotes an upper elliptical diaphragm. As described above, the amplitude can be sufficiently obtained without being restricted by the shape of the speaker device as a damper composed of one large roll,
In particular, the middle roll section 22 attenuates the rolling phenomenon peculiar to an elliptical speaker device generated by a simple flat-type damper or a circular roll damper, so that the amplitude operation at high input becomes smooth, and low distortion and high linearity are achieved. It is possible to provide a speaker device having high performance and a high input resistance.

FIG. 9 shows the sound pressure frequency characteristic and the second harmonic distortion characteristic of the conventional elliptical speaker device and the speaker device of the present embodiment. The speaker device of the present embodiment covers the entire band. It was confirmed that the sound pressure frequency characteristic 24 was higher than the sound pressure frequency characteristic 25 of the conventional speaker device.

Also, the low-frequency reproduction with elongation is shown in the low-frequency range of the sound pressure frequency characteristic. Further, it has been confirmed that, compared to the second harmonic distortion characteristic (conventional type 27), the one according to the present embodiment (26) achieves low distortion and high linearity can be obtained.

Although the above embodiment has been described with reference to an elliptical speaker device, the present invention can be applied to an elongated speaker such as an oval speaker device.

[0031]

As described above, according to the present invention, the shape of the damper is made into a large roll shape like the edge portion of the diaphragm, and a large amount of amplitude can be ensured in a limited space and the diameter of the speaker device. And a speaker device having excellent acoustic characteristics capable of realizing high linearity performance with low distortion.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a speaker device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a damper as the main part.

FIG. 3 is a diagram illustrating a sound pressure frequency characteristic and a second harmonic distortion characteristic of the speaker device according to the related art and the present embodiment.

FIG. 4 is a side sectional view of another embodiment of the present invention.

FIG. 5 is a side sectional view of a speaker device according to another embodiment.

FIG. 6 is a top view of the other embodiment.

FIG. 7 is a sectional side view of the same.

FIG. 8 is a top view of a damper as the main part.

FIG. 9 is a diagram showing sound pressure frequency characteristics and second harmonic distortion characteristics of a conventional elliptical speaker device and the speaker device of the present embodiment.

FIG. 10 is a side sectional view of a conventional speaker device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom plate 2 Magnet 3 Top plate 4 Frame 5 Voice coil bobbin 6 Voice coil bobbin 10, 19 Damper 11 Small hole 12, 13 Bonding part 21 Inner roll part 22 Medium roll part 23 Outer roll part

Claims (5)

[Claims] 1. A magnetic circuit, a frame coupled to the magnetic circuit, and an edge coupled to a bobbin of a voice coil having an outer periphery fixed to the frame and an inner periphery fitted in a magnetic gap of the magnetic circuit. And a diaphragm comprising a diaphragm main body, and a damper having one roll portion whose inner periphery is coupled to the bobbin and whose outer periphery is coupled to the frame. 2. The speaker device according to claim 1, further comprising a bonding portion hanging down to a position near a wire loop of the voice coil on an inner periphery of the damper. 3. The speaker device according to claim 1, wherein a bonding portion having a smaller curvature than the roll portion is provided on an inner periphery of the damper. 4. The speaker device according to claim 1, wherein small holes are provided at appropriate intervals in a roll portion of the damper. 5. A magnetic circuit, a frame having an elongated upper surface coupled to the magnetic circuit, and a bobbin of a voice coil having an outer periphery fixed to the frame and an inner periphery fitted into a magnetic gap of the magnetic circuit. A diaphragm comprising a coupled edge portion and a diaphragm main body, and an elongated damper formed in a roll shape having an inner periphery coupled to the bobbin and an outer periphery coupled to the frame; A speaker device characterized in that the roll-like form on the major diameter side of the damper formed into two rolls is formed of an inner roll part, an outer roll part, and a middle roll part wider than these.