JP2003339097A - Speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the task of making thin the structure of the conventional speaker applied to various acoustic apparatuses and information communication apparatuses. <P>SOLUTION: The inner circumferential shape of a damper 29 near a yoke 23 in the speaker of this invention is configured to avoid contact with an upper end of the yoke 23. Through the configuration above, even when a high input is applied to the speaker and a voice coil 28 is greatly vibrated, the amplitude stroke until the damper 29 is in contact with the yoke 23 is maximally ensured to make the structure of the speaker thin. <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 in various audio equipment and information communication equipment.

[0002]

2. Description of the Related Art A conventional speaker will be described with reference to FIGS.

FIG. 7 shows a cross-sectional view of a conventional speaker, and FIG. 8 shows a cross-sectional view of the main part when the damper reaches the bottom dead center.

As shown in FIGS. 7 and 8, a magnetized magnet 1 is sandwiched between an upper plate 2 and a yoke 3 to form a magnetic circuit 4. The yoke 3 of this magnetic circuit 4
The frame 6 was bonded to the frame 6, and the diaphragm 7 was bonded to the peripheral edge of the frame 6. Then, the voice coil 8 coupled to the diaphragm 7 is centrally held by the damper 9 and coupled so as to fit into the magnetic gap 5 of the magnetic circuit 4.

[0005]

The above-mentioned speaker is intended to be thin, and the amplitude stroke of each component is designed to be small in order to achieve thinness. However,
If the amplitude stroke is designed to be small, there is a problem that the damper 9 comes into contact with the yoke 3 of the magnetic circuit 4 to generate an abnormal sound when the voice coil 8 has a large amplitude. This is a phenomenon that occurs because the corrugation valley-shaped portion on the inner peripheral portion of the damper first contacts the yoke.

The present invention solves the above problems, and provides an excellent speaker that can be made thin by forming a shape in which the amplitude stroke until the damper contacts the yoke can be secured as large as possible. .

[0007]

In order to solve the above problems, the present invention has the following constitution.

According to a first aspect of the present invention, the damper inner peripheral shape in the vicinity of the yoke is formed so as to avoid contact with the upper end of the yoke. With this configuration, even if a large input is applied and the voice coil has a large amplitude, it is possible to secure the maximum amplitude stroke until the damper contacts the yoke, and it is possible to realize a thin structure.

According to the second aspect of the present invention, the shape of the damper in the vicinity of the yoke is such that the shape when the damper reaches the bottom dead center is the same as the upper end of the yoke. . With this configuration, it is possible to secure a large amplitude stroke until the damper comes into contact with the yoke even when a large input is applied and the voice coil has a large amplitude, and it is possible to realize a thin structure.

According to the third aspect of the present invention, the corrugation arrangement of the damper is such that the mountain portion is arranged at a portion where the inner peripheral portion of the damper is likely to come into contact with the upper end portion of the yoke. With this configuration, it is possible to secure a large amplitude stroke until the damper contacts the yoke even if a large input is applied and the voice coil has a large amplitude.
It is possible to reduce the thickness.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Note that description of similar contents will be omitted.

(First Embodiment) The first embodiment of the present invention will be described below, particularly, the invention described in claim 1.

FIG. 1 is a sectional view of a speaker according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view of a main part when a damper reaches bottom dead center.

According to FIGS. 1 and 2, the magnetized magnet 21 is sandwiched between the upper plate 22 and the yoke 23 to form a magnetic circuit 24. This magnetic circuit 24
The frame 26 is connected to the yoke 23 of the
The diaphragm 27 is adhered to 6 and the diaphragm 27
While holding the voice coil 28 coupled to the center by the damper 29, the voice coil 28 is coupled to the magnetic gap 25 of the magnetic circuit 24.

Here, the damper 29 near the yoke 23
The inner peripheral shape of is shaped so as to avoid contact with the upper end of the yoke 23 as shown in FIG. With this configuration, even if a large input is applied and the voice coil 28 has a large amplitude, the amplitude stroke until the damper 29 comes into contact with the yoke 23 can be secured as much as possible, and thinning can be realized.

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

FIG. 3 shows a cross-sectional view of the speaker of the second embodiment of the present invention, and FIG. 4 shows a cross-sectional view of the main part when the damper reaches the bottom dead center.

The difference from the first embodiment is that the shape of the damper 29 near the yoke 23 is such that the shape when the damper 29 reaches the bottom dead center is the same as the upper end of the yoke 23. Is. With this configuration, it is possible to secure a large amplitude stroke until the damper 29 comes into contact with the yoke 23 even if a large input is applied and the voice coil 28 has a large amplitude, and it is possible to realize a thin structure.

Except for this content, the description is omitted because it is the same as the first embodiment.

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

FIG. 5 is a sectional view of the speaker according to the third embodiment of the present invention, and FIG. 6 is a sectional view of the main part when the damper reaches the bottom dead center.

The difference from the first embodiment is that the damper 29 is used.
In the corrugated arrangement, the mountain portion is arranged in a portion where the inner peripheral portion of the damper 29 is likely to come into contact with the upper end of the yoke 23. With this configuration, even if a large input is applied and the voice coil 28 has a large amplitude, the damper 2
The corrugation crest portion 9 can secure a large amplitude stroke until it comes into contact with the yoke 23, and can realize a thin structure.

Except for this content, the second embodiment is the same as the first embodiment, and the description thereof will be omitted.

[0024]

As described above, in the speaker of the present invention, the damper inner peripheral shape in the vicinity of the yoke is formed so as to avoid contact with the upper end of the yoke. With this configuration, even if a large input is applied and the voice coil has a large amplitude, it is possible to secure the maximum amplitude stroke until the damper contacts the yoke, and it is possible to realize a thin structure.

As described above, the present invention can provide an excellent speaker that can be made thin, and its industrial value is extremely great.

[Brief description of drawings]

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

FIG. 2 is a sectional view of a main part according to the first embodiment of the present invention.

FIG. 3 is a sectional view of a speaker according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a speaker according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a main part according to a third embodiment of the present invention.

FIG. 7 is a sectional view of a conventional speaker.

FIG. 8 is a sectional view of a conventional main part.

[Explanation of symbols]

21 magnet 22 Upper plate 23 York 24 Magnetic circuit 25 magnetic gap 26 frames 27 diaphragm 28 voice coils 29 damper

Claims (3)

[Claims] 1. A magnetic circuit including a magnet, a plate and a yoke, a frame coupled to the magnetic circuit, a diaphragm coupled to the frame, a diaphragm coupled to the diaphragm, and a part of the magnetic circuit. A speaker comprising a voice coil arranged in a magnetic gap of a circuit and a damper supporting the voice coil in the magnetic gap, wherein the damper has an inner peripheral shape in the vicinity of the yoke, and the damper reaches a bottom dead center. The speaker is shaped so that it can avoid contact with the upper end of the yoke. 2. The speaker according to claim 1, wherein the damper inner peripheral shape in the vicinity of the yoke when the damper reaches the bottom dead center has the same shape as the upper end portion of the yoke. 3. The damper corrugation is composed of a mountain portion and a valley portion, and the arrangement of the mountain portion and the valley portion is such that the mountain portion is arranged at a portion where the inner peripheral portion of the damper is likely to come into contact with the upper end portion of the yoke. The speaker according to claim 1.