JP2003333686A - Loudspeaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a loudspeaker which is miniaturized without lowering a sound pressure level. <P>SOLUTION: The loudspeaker is provided with: a magnetic circuit 4; a voice coil 8 whose one terminal is freely movably located on a magnetic gap 5 provided in the magnetic circuit 4; a diaphragm 7 coupled to the other terminal of the voice coil 8; and a frame 6 for linking the peripheral edge of the diaphragm 7 and the outer peripheral surface of the magnetic circuit 4, and an outer peripheral edge 6a of the frame 6 has an angle relative to its inner peripheral edge 6b. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker used for various audio equipments, information communication equipments such as mobile phones.

[0002]

2. Description of the Related Art In recent years, along with the miniaturization of electronic devices such as portable information terminals, there is a demand for miniaturization of speakers used therein.

FIG. 6 shows a conventional speaker. Magnet 1 magnetized on the surface of the concave portion of yoke 3 having a concave shape
An upper plate 2 is provided on the surface of the magnet 1, and a magnetic gap 5 is provided between the peripheral surface of the magnet 1 and the inner peripheral surface of the recess of the yoke 3 to form a magnetic circuit 4. There is. A frame 16 is provided on the outer peripheral surface of the yoke 3, and a diaphragm 7 provided so as to cover the upper plate 2 is joined at a peripheral edge portion 16 a of the frame 16. A voice coil 8 is provided on the diaphragm 7, and one end of the voice coil 8 is movably arranged in the magnetic gap 5 of the magnetic circuit 4.

[0004]

In the above structure, as a method for downsizing the speaker, particularly for reducing the outer dimensions thereof, there is a method for reducing the frame 16 itself. In this case, the area of the movable diaphragm 7 is also reduced. There is a problem in that the sound pressure level is lowered because it becomes smaller.

Therefore, an object of the present invention is to provide a speaker whose external dimensions are reduced without lowering the sound pressure level.

[0006]

In order to achieve this object, the invention according to claim 1 of the present invention has a magnetic circuit and a magnetic gap provided in the magnetic circuit, one end of which is movably arranged. The voice coil includes a voice coil, a diaphragm coupled to the other end of the voice coil, and a frame connecting the peripheral portion of the diaphragm and the outer peripheral surface of the magnetic circuit. The outer peripheral portion of the frame has an inner peripheral edge. This is a speaker that has an angle with respect to the section, and this allows the external dimensions of the speaker to be reduced without changing the effective vibration dimension of the diaphragm. As a result, the speaker can be made compact without reducing the sound pressure level. There is an effect that it can be realized.

The invention according to claim 2 of the present invention is the speaker according to claim 1, wherein an angle of an outer peripheral edge portion of the frame is 10 to 90 degrees with respect to an inner peripheral edge portion thereof in a rear surface direction of the frame. In addition to the effect of claim 1, when the speaker is incorporated in a set, the position of the diaphragm can be more easily arranged in front of the set, and as a result, the sound pressure level can be improved. .

The invention according to claim 3 of the present invention is the speaker according to claim 1, wherein the angle of the outer peripheral edge portion of the frame is 10 to 90 degrees with respect to the inner peripheral edge portion in the surface direction of the frame. In addition to the function and effect of the first aspect, by providing a horn shape on the front surface of the diaphragm, it is possible to adjust the frequency characteristics as a speaker.

The invention according to claim 4 of the present invention is the speaker according to claim 1, wherein an angle of an outer peripheral edge portion of the frame is 90 to 180 degrees in a rear surface direction of the frame with respect to an inner peripheral edge portion thereof. Therefore, in addition to the action and effect of claim 1, the action and effect that the coupling strength between the diaphragm and the frame can be improved.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a speaker of the present invention will be described with reference to embodiments and drawings. The same parts as those of the conventional speaker are designated by the same reference numerals.

(First Embodiment) The first embodiment of the present invention will be described below with reference to the present invention.

FIG. 1 is a sectional view of the speaker of the first embodiment.

According to FIG. 1, a magnetized magnet 1 is sandwiched between an upper plate 2 and a yoke 3 to form an inner magnet type magnetic circuit 4. The frame 6 is coupled to the yoke 3 of the magnetic circuit 4, and the outer peripheral edge portion 6 of the frame 6 is joined.
A diaphragm 7 is bonded to a, and one end of a voice coil 8 having the other end coupled to the diaphragm 7 is movably arranged in the magnetic gap 5 of the magnetic circuit 4.
Here, the outer peripheral edge portion 6a of the frame 6 to which the diaphragm 7 is coupled has an angle.
According to this configuration, the effective vibration dimension of the diaphragm 7 can be maintained, so that the outer dimension of the speaker can be made as small as possible without lowering the sound pressure level.

(Second Embodiment) The second embodiment of the present invention will be described below, particularly the invention described in claim 2.

FIG. 2 is a sectional view of the speaker of the second embodiment.

The difference from the first embodiment is that the angle of the outer peripheral edge portion 6a of the frame 6 to which the diaphragm 7 is coupled is set in the range of 10 to 90 degrees downward with respect to the inner peripheral edge portion 6b. It is a thing.

As shown in FIG. 2, particularly, when the angle is close to 90 degrees, the outer dimensions of the speaker can be made as close as possible to the outer dimensions of the diaphragm 7. According to this configuration, the effective vibration dimension of the diaphragm 7 can be maintained, so that the outer dimension of the speaker can be made as small as possible without lowering the sound pressure level. In addition, the sound pressure level can be improved by disposing the diaphragm 7 on the front surface.

When the angle is set to 90 degrees as shown in FIG. 2, the speaker can be attached to the set so that the attachment screws can be tightened from the lateral direction. It is also possible to achieve miniaturization including.

Since the contents other than the above are the same as those in the first embodiment, the description thereof is omitted.

(Embodiment 3) The invention of claim 3 of the present invention will be described below with reference to Embodiment 3 and FIGS. 3 and 4.

FIG. 3 shows a sectional view of the speaker of the third embodiment.

The difference from the first embodiment is that the angle of the outer peripheral edge portion 6a of the frame 6 to which the diaphragm 7 is coupled is angled upward with respect to the inner peripheral edge portion 6b in the range of 10 to 90 degrees. It is composed.

The adhesive between the diaphragm 7 and the frame 6 is provided on the same side as the diaphragm 7.

With this configuration, the outer dimensions of the speaker can be made closer to the effective vibration dimension of the diaphragm 7.
Moreover, by arranging the position of the diaphragm 7 on the rear surface,
By providing a horn shape on the front surface, the frequency characteristics can be adjusted as a speaker.

Further, particularly when the angle is set to 90 degrees, the speaker can be mounted to the set so that the mounting screws can be tightened from the lateral direction, and the speaker including the set is small. It is also possible to achieve this.

The difference between FIG. 4 and FIG. 3 is that the diaphragm 7
And the adhesive portion of the frame 6 is provided on the side opposite to the diaphragm 7. With this configuration, the effective vibration dimension of the diaphragm 7 can be maintained, so that the outer dimension of the speaker can be reduced without lowering the sound pressure level. In addition, the coupling strength between the diaphragm 7 and the frame 6 can be improved, and as a result, the sound pressure level can be improved.

The contents other than the above are the same as those in the first embodiment, and the description thereof will be omitted.

(Fourth Embodiment) The fourth embodiment of the present invention will be described below with reference to the present invention.

FIG. 5 is a sectional view of the speaker of the fourth embodiment.

The difference from the first embodiment is that the outer peripheral edge portion 6a of the frame 6 to which the diaphragm 7 is coupled has an angle in the downward direction with respect to the inner peripheral edge portion 6b in the range of 90 to 180 degrees. It is configured by. According to this configuration,
Since the effective vibration dimension of the diaphragm 7 can be maintained, the outer dimension of the speaker can be made as small as possible without lowering the sound pressure level. In addition, the coupling strength between the diaphragm 7 and the frame 6 can be improved, and as a result, the sound pressure level can be improved.

The contents other than the above are the same as those in the first embodiment, and the description thereof is omitted.

[0032]

As described above, according to the present invention, the magnetic circuit, the voice coil whose one end is movably disposed in the magnetic gap provided in the magnetic circuit, and the other end of the voice coil are coupled. A speaker having a diaphragm and a frame connecting a peripheral portion of the diaphragm and an outer peripheral surface of the magnetic circuit, the outer peripheral portion of the frame being an angle with respect to the inner peripheral portion thereof. Thus, the outer dimensions of the speaker can be reduced without changing the effective vibration dimension of the diaphragm, and as a result, the speaker can be downsized without lowering the sound pressure level.

[Brief description of drawings]

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

FIG. 2 is a sectional view of the same.

FIG. 3 is a sectional view of the same.

FIG. 4 is a sectional view of the same.

FIG. 5 is a sectional view of the same.

FIG. 6 is a sectional view of a conventional speaker.

[Explanation of symbols]

1 magnet 2 Upper plate 3 York 4 magnetic circuit 5 magnetic gap 6 frames 6a outer peripheral portion 6b inner peripheral edge 7 diaphragm 8 voice coils

Claims (4)

[Claims] 1. A magnetic circuit, a voice coil having one end movably arranged in a magnetic gap provided in the magnetic circuit, a diaphragm coupled to the other end of the voice coil, and a peripheral portion of the diaphragm. And a frame connecting the outer peripheral surface of the magnetic circuit to the outer peripheral surface of the magnetic circuit, the outer peripheral portion of the frame having an angle with the inner peripheral portion. 2. The speaker according to claim 1, wherein an angle of an outer peripheral edge portion of the frame is 10 to 90 degrees in a rear surface direction of the frame with respect to an inner peripheral edge portion thereof. 3. The speaker according to claim 1, wherein an angle of an outer peripheral edge portion of the frame is 10 to 90 degrees with respect to an inner peripheral edge portion thereof in a surface direction of the frame. 4. The speaker according to claim 1, wherein an angle of an outer peripheral edge portion of the frame is 90 to 180 degrees in a rear surface direction of the frame with respect to an inner peripheral edge portion thereof.