JP3767689B2 - Speaker structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a speaker, and more particularly to a structure for supporting the diaphragm.
[0002]
[Prior art]
FIG. 2 shows an example of a speaker structure proposed in Japanese Patent Laid-Open Nos. 7-203585 and 9-84180 in order to output a larger volume with a limited size. A voice coil 7 wound around a voice coil bobbin 6 is disposed in a magnetic gap of a magnetic circuit composed of a magnet 8, a top plate 9, and a yoke 10 shown in FIG.
[0003]
That is, the inner periphery of each of the damper 4 and the diaphragm 12 is bonded to the voice coil bobbin 6, and the outer periphery of the damper 4 and the outer periphery of the edge 13 bonded to the diaphragm 12 are bonded to the frame 11 fixed to the yoke 10. .
[0004]
And the dust cap 5 is adhere | attached on the center part of a diaphragm, and it is prevented that dust enters into the part of a magnetic gap. In order to make the vibration part of the vibration plate 12 as large as possible with respect to the limited size of the frame 11, the vibration plate 12 extends outward from the bonding part of the edge 13.
[0005]
[Problems to be solved by the invention]
In the conventional speaker structure described above, the space substantially surrounded by the edge 13 and the diaphragm 12 is semi-sealed, and when the diaphragm 12 vibrates, the volume of the semi-sealed space increases and decreases, so this space is an air spring. There was a problem of acting as an adverse effect on the sound quality.
[0006]
The present invention has been made in view of the above points, and an object of the present invention is to provide a loudspeaker structure capable of outputting a louder sound with a limited size and having good sound quality. It is in.
[0007]
[Means for Solving the Problems]
The speaker structure according to the present invention is such that the cone of the diaphragm extends outside the edge support portion by supporting the outer surface of the cone inside the outermost periphery of the diaphragm formed on the cone with an edge. And the portion excluding the diaphragm supporting portion and the frame fixing plane in the radial cross section of the edge is formed into a single S-shape, and the portion extending to the outer peripheral side from the portion supported by the edge of the diaphragm The sound absorbing material is fixed to the side facing the edge so as to be separated from the edge.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A structure of a speaker according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing the structure of a speaker according to an embodiment of the present invention. In the figure, parts having the same functions as those shown in the conventional example are denoted by the same reference numerals, and detailed description thereof is omitted.
[0010]
In the diaphragm 1 shown in FIG. 1, a vibrating portion extends outside a portion bonded to the edge 2, and a sound absorbing material 3 is attached to the side of the portion facing the edge 2. The cross section in the radial direction of the edge 2 is S-shaped. Other configurations are the same as the conventional example.
[0011]
Thus, since the area of the vibration part of the diaphragm 1 can be made larger than the size of the frame 11, a high sound volume can be output for the size. In addition, since the cross section in the radial direction of the edge 2 is S-shaped, the volume of the space substantially surrounded by the edge 2 and the diaphragm 1 during vibration of the diaphragm 1 is substantially constant, and the sound quality does not deteriorate.
[0012]
Moreover, since the sound absorbing material is stuck on the surface of the diaphragm 1 facing the edge 2, the generation of noise due to the flow of air is prevented.
[0013]
【The invention's effect】
According to the structure of the speaker of the present invention, since the area of the vibration part of the diaphragm can be increased compared to the overall dimensions, a high sound volume can be output for the dimensions.
[0014]
In addition, since the cross section in the radial direction of the edge is S-shaped, the volume of the space substantially surrounded by the edge and the diaphragm during vibration of the diaphragm is substantially constant, and the sound quality is not deteriorated.
[0015]
Further, the sound absorbing material adhered to the surface facing the edge 2 of the diaphragm 1 is prevented from generating abnormal noise due to the air flow.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a structure of a speaker according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing an example of the structure of a conventional speaker.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Diaphragm 2 Edge 3 Sound absorption material 4 Damper 5 Dust cap 6 Voice coil bobbin 7 Voice coil 8 Magnet 9 Top plate 10 Yoke 11 Frame 12 Diaphragm 13 Edge

Claims (1)

In the speaker in which the cone of the diaphragm extends outside the edge support portion by supporting the outer surface of the cone inside the outermost periphery of the diaphragm formed on the cone with the edge, the radial cross section of the edge A portion excluding the diaphragm support portion and the frame fixing plane is formed in a single S-shape, and an edge is formed on the side facing the edge of the portion extending to the outer peripheral side from the portion supported by the edge of the diaphragm. A speaker structure characterized in that a sound absorbing material is fixed in a separated state.

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