JP4403678B2 - Speaker and speaker device using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a speaker used in various audio devices and a speaker device using the speaker.
[0002]
[Prior art]
The prior art will be described with reference to FIGS. FIG. 4 is a sectional view of a conventional speaker, and FIG. 5 is a sealed speaker box incorporating the speaker.
[0003]
According to the figure, reference numeral 1 denotes a frame whose bottom surface is adhesively bonded to the yoke 2.
[0004]
Reference numeral 3 denotes a magnet, which is adhesively bonded to the inner bottom surface of the yoke 2.
[0005]
A top plate 4 is adhesively bonded onto the magnet 3, and the top plate 4, the magnet 3, and the yoke 2 form a magnetic circuit A.
[0006]
Reference numeral 6 denotes a voice coil fitted in the magnetic gap 5 of the magnetic circuit A, and reference numeral 7 denotes an inner periphery adhesively bonded to the voice coil 6 and an outer periphery adhesively bonded to the frame 1 via an edge 8. 15 is a damper that supports the voice coil 6 having a corrugated corrugated shape having a corrugated cross-section with an inner periphery adhesively bonded to the voice coil 6 and an outer periphery adhesively bonded to the frame 1. is there. Reference numeral 14 denotes a dust cap.
[0007]
Reference numeral 20 denotes a sealed speaker box in which the speaker 21 formed as described above is mounted inside with the diaphragm 7 facing outward.
[0008]
The speaker 21 inputs a voice signal from the outside to the voice coil 6 to drive the voice coil 6 up and down, thereby vibrating the diaphragm 7 to emit sound.
[0009]
[Problems to be solved by the invention]
Normally, the speaker is required to swing symmetrically in the vertical direction, and it is ideal that the edge 8 and the damper 15 supporting the vibration component are also displaced in the vertical direction. In the speaker device using the sealed speaker box 20 as shown in FIG. 5, in the case where the volume of the speaker box 20 is very small, an increase in distortion is observed due to the phenomenon that does not cause the above-described vertical displacement, and the size is small. The solution has been an important issue for speaker devices that require heavy bass.
[0010]
More specifically, assume a speaker mounted on a speaker box 20 having a volume of 1 (L). When the speaker 21 is driven to vibrate the diaphragm 7 inward and the volume of the speaker box 20 inside the diaphragm 7 becomes 0.5 (L), the inside of the speaker box 20 Is 2 atm.
[0011]
However, if the diaphragm 7 has the same amount of amplitude outward, the inside of the speaker box 20 is only (1 / 1.5 =) 0.67. Therefore, the diaphragm 7 of the speaker 21 receives pressure toward the outside and always operates in a state of popping out.
[0012]
Such a small speaker device has problems in sound quality such as an increase in distortion as described above due to the deviation of the center of the amplitude due to the imbalance of the internal pressure.
[0013]
The present invention solves the above problems and provides an excellent speaker and a speaker device using the speaker.
[0014]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the speaker according to claim 1 of the present invention is a speaker in which the diaphragm is mounted in a box with the diaphragm facing outward, and an internal / external pressure applied to the diaphragm. In order to balance the noise, the coupling point with the voice coil of the damper is provided above the horizontal position. When the speaker is stationary, the damper is displaced in advance to the upper position to support the diaphragm. Waveform deformation is already added in the operation, subtraction is performed in the downward operation, and flexibility is lowered and the amplitude control is also early in the upward operation, and the reverse operation is the reverse phenomenon, and the inside and outside of the speaker box are reversed. The pressure balance is substantially balanced, the symmetry of the amplitude of the diaphragm is improved, and distortion can be improved.
[0015]
The speaker according to claim 2 of the present invention is such that the center line connecting the center of the unevenness of the damper according to claim 1 in the radial direction is + 2 ° or more with respect to the horizontal axis when the speaker is stationary or the speaker is stationary. The point at which the innermost peripheral point is displaced by 0.5 mm or more in the vertical direction with respect to the outermost peripheral point of the waveform is used as a connection point with the voice coil, and the effect of claim 1 is made more certain. It is.
[0016]
The speaker according to claim 3 of the present invention is a speaker in which a diaphragm is mounted on the inside of the box outside the box, and the voice of the damper is used to substantially balance the internal and external pressure applied to the diaphragm. Coupling point with the coil is provided below the horizontal position, waveform deformation has already been added in the downward movement, subtraction in the upward movement, and flexibility in the downward movement is lower than in the upward movement and amplitude control In the upward movement, the reverse phenomenon occurs, and the pressure balance inside and outside the speaker box is substantially balanced, the symmetry of the amplitude of the diaphragm is improved, and distortion can be improved.
[0017]
According to a fourth aspect of the speaker of the present invention, a point where the center line connecting the center of the unevenness of the damper according to the third aspect in the radial direction is at least −2 ° with respect to the horizontal axis when the speaker is stationary or the speaker. The point at which the innermost peripheral point is displaced by -0.5 mm or more in the vertical direction with respect to the outermost peripheral point of the waveform at rest is used as a connection point with the voice coil. It is something to squeeze.
[0018]
The speaker device according to claim 5 of the present invention is mounted so that the speaker according to claim 1 or 2 or 3 or 4 and the diaphragm of any of these speakers are arranged in the opening. Thus, it is possible to provide a speaker device with improved distortion characteristics by substantially balancing the pressure balance inside and outside the speaker box.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a speaker of the present invention will be described with reference to FIGS. In the description, the same parts as those in the prior art are denoted by the same reference numerals, and description thereof is omitted.
[0020]
(Embodiment 1)
FIG. 1 is a cross-sectional view of a speaker according to an embodiment, FIG. 2 is a force-displacement characteristic diagram of a damper which is the main part, and FIG. 3 is a main part of the speaker in a speaker device in which the speaker is incorporated in a sealed box. It is a maximum amplitude-frequency characteristic diagram of the diaphragm which is a part.
[0021]
The speaker 22 will be described only with respect to the difference from the prior art shown in FIG. 1. 9 is a damper, 10 is a center line that connects the centers of the corrugated shapes of the damper in the radial direction, and 11 is a frame on the outer periphery of the damper 9. 1 is a horizontal line with reference to the adhesive bonding portion with 1, 12 indicates an angle between the center line 10 and the horizontal line 11, and 13 indicates a vertical distance between the horizontal line 11, the damper 9 and the connection point of the voice coil 6. ing.
[0022]
As is apparent from FIG. 1, in the present embodiment, the speaker is configured with the point of adhesive coupling between the voice coil 6 and the damper 9 above the horizontal position.
[0023]
More specifically, a speaker 22 having a 12 cm aperture is mounted on a sealed speaker box 20 as in FIG. At this time, the internal capacity of the speaker box 20 is 1.5 (L), and the joint point of the speaker 9 with the damper 9 and the voice coil 6 is set at an angle 12 of about 2 ° and a vertical distance 13 of 0. The speaker 22 was configured as 6 mm.
[0024]
According to the force (N) -displacement characteristic of the damper 9 in FIG. 2, a is an approximate curve indicating the flexibility at the normal amplitude on the upper (projecting) side, and b is the flexibility at the normal amplitude on the lower (sinking) side. The approximate curve a is approximately 2.8 mm / N as indicated by a1 and the approximate curve b is approximately 3.6 mm / N as indicated by b1 and the flexibility of the damper 9 of the present embodiment. The degree differs depending on the vertical movement, and it was confirmed that the damper 9 was easy to sink and hard to jump out.
[0025]
Further, according to the maximum amplitude-frequency characteristics (when 20 mmW is input) in FIG. 3, c indicates the characteristics of the speaker 22 of the present embodiment, and d indicates the case where the conventional speaker 21 is mounted in the speaker box 20. C, the amplitude symmetry of the upper and lower diaphragms is improved from that of d, and it is confirmed that the imbalance of the internal pressure in the speaker box 20 is improved, and the distortion of the sound is suppressed. (In practice, it was confirmed that the effect was obtained by setting the angle 12 to 2 ° or more or the vertical distance 13 to 0.5 mm or more).
[0026]
In the speaker device using the speaker 22 and the speaker box 20 as in the present embodiment, not only the sound quality can be improved by suppressing the distortion described above, but also the reproduction sound pressure of the bass can be improved.
[0027]
In the above-described embodiment, the speaker 22 is described as being mounted in the speaker box 20. However, it is also possible to mount the speaker so that the opening of the speaker box is covered with the speaker from the outside. Although it is not intended, this is a possible configuration when the main purpose is the generation of bass. In this case, the connection point between the voice coil 6 and the damper 9 is below the horizontal line 11 (the angle 12 is set to -2 ° or the vertical distance 13). If the above embodiment is set to be positive and the same is set to a negative value, the same effect can be obtained.
[0028]
【The invention's effect】
As described above, the speaker of the present invention and the speaker device using the same suppress the imbalance of the internal pressure of the speaker box and improve the vertical symmetry of the amplitude of the diaphragm of the speaker, thereby reducing the reproduction sound pressure of the bass. It is possible to provide an excellent speaker device that improves sound quality by increasing distortion and reducing distortion.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an embodiment of a speaker of the present invention. FIG. 2 is a force-displacement characteristic diagram of a damper which is the main part. FIG. 3 is a main part of a speaker in a speaker device using the speaker. Fig. 4 is a cross-sectional view of a conventional speaker. Fig. 5 is a perspective view of a speaker device using the speaker.
1 Frame 5 Magnetic gap 6 Voice coil 7 Diaphragm 9 Damper 20 Speaker box A Magnetic circuit

Claims (5)

A magnetic circuit, a frame coupled to the magnetic circuit, a diaphragm having an outer periphery coupled to the frame, a voice coil coupled to the diaphragm at an upper end and fitted in a magnetic gap of the magnetic circuit, and an inner circumference The damper is connected to the voice coil and has a shape of a circularly concave / convex waveform whose outer periphery is connected to the frame. The damper is mounted in a speaker box with the diaphragm facing outward from the box. A speaker, wherein a coupling point between the damper and the voice coil is provided above a horizontal position in order to substantially balance internal and external pressure applied to the diaphragm. The center line that connects the center of the bumps in the radial direction is + 2 ° or more with respect to the horizontal axis when the speaker is stationary, or the innermost point is +0.5 mm or more perpendicular to the outermost point of the waveform when the speaker is stationary The speaker according to claim 1, wherein the point displaced to 1 is used as a coupling point with the voice coil. A magnetic circuit, a frame coupled to the magnetic circuit, a diaphragm having an outer periphery coupled to the frame, a voice coil coupled to the diaphragm at an upper end and fitted in a magnetic gap of the magnetic circuit, and an inner circumference This is a speaker that is connected to this voice coil and is configured with a damper having a shape that repeats an annular undulation waveform whose outer periphery is connected to the frame in the radial direction, and a diaphragm is mounted outside the speaker box with the diaphragm facing the inside of the box. A speaker in which a coupling point between the damper and the voice coil is provided below a horizontal position in order to substantially balance the internal and external pressure applied to the diaphragm. The center line that connects the center of the bumps in the radial direction is at a point of -2 ° or more with respect to the horizontal axis when the speaker is stationary, or the innermost point is -0.5mm or more with respect to the outermost point of the waveform when the speaker is stationary. 4. The speaker according to claim 3, wherein the point displaced in the vertical direction is a connection point with the voice coil. A speaker device comprising a speaker box and the speaker according to claim 1, 2, 3, or 4 mounted so that a diaphragm is disposed in an opening of the speaker box.

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