JPH03247099A - Speaker - Google Patents

Abstract

PURPOSE:To reproduce abundant low frequency sound by decreasing the hardness of at least either an edge or a damper working as a support member gradually from an outer circumferential part of the support member toward the inner periphery of the support member. CONSTITUTION:The hardness of the edge 10 is gradually decreased from the outer periphery of the edge 10 with much coated quantity of a coat agent 11 toward the inner periphery of the edge 10 with less coated quantity of the coat agent 11 and the compliance of the edge 10 is accordingly gradually increased from the outer periphery of the edge 10 toward the inner periphery of the edge 10. With a small input of a signal current of sound, since the low resonance frequency is reduced corresponding to the inner periphery of the support member with high compliance, abundant low frequency sound is reproduced. On the other hand, with a large input of sound signal current, since the stroke of the vibration of the vibration member is controlled corresponding to the outer periphery of the support member with low compliance, production of harmonic distortion is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a speaker used in an audio system.

(Prior Art) Generally, in a conventional speaker, as shown in FIG. 7, a diaphragm 76 that emits an audio signal current as a sound wave is supported by a frame 79 for protecting each component inside the speaker. Therefore, an edge 80 is provided as a support system member, and a damper 78 is provided as a support system member in order to support the voice coil bobbin 75 connected to the inner peripheral part of the diaphragm 76 with the frame 79. ing.

Edge 80 as the support system member and damper 78
are each made of a single material such as cloth and have uniform hardness, and are used to control the vibration stroke of the vibration system members consisting of the voice coil 74, voice coil bobbin 75, and diaphragm 76. It functions as a stopper.

[Problem to be solved by the invention]

However, when the above-mentioned conventional speaker is used for high power and an excessive audio signal is input to the speaker, an excessive vibration load is applied to the vibration system members, and the vibration stroke of the vibration system members reaches its limit. , harmonic distortion occurs, and as a result, the sound quality emitted from the diaphragm 76 becomes a sharp, sharp sound, resulting in a deterioration in sound quality. Furthermore, in order to avoid such a problem, if the compliance of the edge 80 and damper 78 is lowered by increasing the hardness of the speaker edge 80 and damper 78, harmonic distortion can be avoided, but harmonic distortion may be avoided. , the problem is that the low resonance frequency becomes high and bass cannot be produced.

[Means to solve the problem]

In order to solve the above problems, the speaker according to the present invention emits sound waves by the vibration of a vibration system member, and is provided with an edge and a damper as a support system member for supporting the vibration system member with a frame. The following measures are taken in a speaker in which a vibration system member is connected to each inner peripheral part of these support system members, and a frame is connected to each outer peripheral part of the support system member.

That is, the hardness of at least one of the edge as the support system member and the damper gradually decreases from the outer circumference of the support system member to the inner circumference of the support system member.

[For production]

According to the above configuration, the compliance of the support system member gradually increases from the outer circumference of the support system member to the inner circumference of the support system member in accordance with changes in the hardness of the support system member. Therefore, when a small audio signal current is input, the inner circumferential portion of the support system member with high compliance responds and lowers the low resonance frequency, making it possible to reproduce rich bass sounds. On the other hand, when a large audio signal current is input, the outer periphery of the support system member with low compliance responds and controls the vibration stroke of the vibration system member, making it possible to avoid harmonic distortion. Become.

[Example 1] An example of the present invention will be described below based on FIGS. 1 and 2.

As shown in FIG. 1, the speaker according to the present invention has a magnetic circuit 12 on the back. This magnetic circuit 12 consists of a disc-shaped top plate 1 having an opening 1a, a disc-shaped bottom plate 3 having a cylindrical center ball 3a at the center, and the top plate 1 and bottom plate 3. It is composed of an annular magnet 2 provided between the center ball 3a and a ring-shaped magnet 2 arranged so as to surround the outer periphery of the center ball 3a at a predetermined interval, and each of these members is integrally connected.

Attached to the front end surface of the top plate 1 is the inner peripheral end side of a frame 9 for protecting each component inside the speaker. An edge support portion 9a having an annular flat surface shape is formed on the outer periphery of the frame 9.

The outer peripheral portion of an annular edge 10 serving as a support system member is fixed to this edge support portion 9a.

The edge 10 has a convex portion 10a that protrudes upward on the entire circumference.
A coating agent 11, such as acrylic, is applied in a gradually decreasing amount from the outer periphery to the inner periphery of the edge 10.

In addition, the inner circumferential portion of the mechanical ring 10 is connected to the outer circumferential portion of a cone-shaped vibration vi6 as a vibration system member, so that the outer circumferential portion of the diaphragm 6 is supported by the edge of the frame 9 via the edge 10. It is supported by part 9a. The inner periphery of the diaphragm 6 is connected to the outer periphery of the front end of a voice coil bobbin 5 as a vibration system member, and the voice coil bobbin 5 is supported by a frame 9 via a damper 8 as a support member. .

The damper 8 has an annular shape, and has upwardly protruding convex portions 8a and downwardly protruding concave portions 8b alternately provided in the radial direction of the damper 8.

A center cap 7 is placed in the cone-shaped center of the diaphragm 6 to cool the opening of the voice coil bobbin 5.
The rear part of the voice coil bobbin 5 is located in the gap formed between the center ball 3a and the top plate 1, and the voice coil 4 as a vibration system member is attached to the outer peripheral part of the rear part of the voice coil bobbin 5. It is wrapped.

In the above configuration, as shown in FIG. 2, the edge 10 extends from the outer periphery of the edge 10 where the coating amount of the coating agent 11 is increased to the inner periphery of the edge 10 where the coating amount of the coating agent 11 is decreased. The hardness of the edge 10 gradually decreases, and correspondingly, the compliance of the edge 10 gradually increases from the outer periphery of the edge 10 to the inner periphery of the edge 10.

[Example 2] A speaker according to this example is formed in the same manner as the speaker of the first example except for the edges.

As shown in FIG. 3, the edge 20 according to the second embodiment includes a convex portion 20a that protrudes upward in the radial direction of the edge 20,
A concave portion 20b protruding downward and a convex portion 20c protruding upward are sequentially provided from the inner circumferential portion to the outer circumferential portion of the edge 20.

In addition, the convex portion 20a, the concave portion 20b, and the convex portion 20c
The lengths Ll, L2, and L3 of each unevenness have the following relationship: Ll>L2>L3.

Note that the number of convex portions and concave portions provided on the edge 20 is not particularly limited, and the length of the concave portions may gradually decrease from the inner circumference to the outer circumference of the edge 20. Don't be silly.

In the above configuration, the edge 20 is a convex portion 2 provided in a row.
0a, the concave portion 20b, and the convex portion 20c, the hardness is
The compliance of the edge 20 gradually decreases from the outer periphery connected to the frame 9 of the edge 20 to the inner periphery connected to the diaphragm 6 of the edge 20. The height gradually increases from the outer circumference of the edge 20 to the inner circumference of the edge 20.

In addition to the edge 10 of the first embodiment and the edge 20 of the second embodiment, the edge of the speaker according to the present invention includes an edge in which the foaming ratio is changed from the outer periphery to the inner periphery of the edge, Alternatively, by using edges with varying thicknesses, the compliance of the edge can be gradually increased from the outer periphery to the inner periphery of the edge.

[Embodiment 3] A speaker according to this embodiment is formed in the same manner as the speaker of the first embodiment except for the edges and the damper.

The edges (not shown) of the third embodiment are the edges 10 of the first embodiment to which the coating agent 11 is not applied.

The damper 18 according to the third embodiment has the same shape as the damper 8 of the first embodiment, as shown in FIG. The amount of coating is reduced from the inner circumference to the inner circumference.

In the above configuration, the damper 18 is connected to the voice coil bobbin 5 of the damper 18 from the outer circumference connected to the frame 9 of the damper 18 so that the hardness changes according to changes in the amount of the applied impregnant 21. It gradually decreases toward the inner circumference, and correspondingly, the compliance of the damper 18 gradually increases from the outer circumference of the damper 18 to the inner circumference of the damper 18.

[Embodiment 4] A speaker according to this embodiment is formed in the same manner as the speaker of the third embodiment except for the damper.

As shown in FIG. 5, the damper 28 of the fourth embodiment has convex portions 28a that protrude upward in the radial direction of the damper 28.
, and downwardly protruding recesses 28b are alternately provided.

In addition, the convex portions 28a... and the concave portions 28b...
The length of each unevenness is determined from the inner circumference connected to the voice coil bobbin 5 of the damper 28 to the frame 9 of the damper 28.
It gradually decreases toward the outer periphery where it is connected to.

In the above configuration, the damper 28 has a striped convex portion 2
The hardness gradually decreases from the outer periphery to the inner periphery of the damper 28 in accordance with the change in the length of each unevenness of the recesses 8a... and the recesses 28b... The compliance of the damper 28 gradually increases from the outer circumference of the damper 28 to the inner circumference of the damper 28.

Incidentally, the speaker according to the present invention is manufactured by applying a coating agent to the edges in the first embodiment, changing the shape of the edges in the second embodiment, and changing the shape of the edges in the third embodiment.
It does not matter whether a combination of applying an impregnating agent to the damper in the embodiment or changing the shape of the damper in the fourth embodiment is used, and a speaker using a combination of these methods may be used. , it is possible to obtain even more effects of the speaker according to the present invention than a speaker that takes these measures alone.

[Effects of the Invention] As described above, in the speaker according to the present invention, the hardness of at least one of the edges as the support system member and the damper increases from the outer circumference of the support system member to the inner circumference of the support system member. , which is a configuration that is gradually decreasing.

As a result, as shown in FIG. 6, the vibration stroke of the vibration system member of the speaker according to the present invention in response to the vibration load is lower than that of the conventional speaker A in which the compliance of the support system member is high. When a small signal current is input, that is, at point a with a small load, the stroke value is the same as that of speaker A, but while speaker A reaches its stroke limit with the load at point b, the stroke limit is set to 0. It extends to the point. In addition, when compared with Speaker B, which has a conventional support system member with low compliance, when a large audio signal current is input, that is, at the 0 point with a large load, the stroke value is the same as that of Speaker B. At point a, which is the time when a small signal current is input, the stroke value of speaker B is small, and the reproduced sound in the low range is small.
It has the effect of taking a large stroke value and making it possible to reproduce rich bass sounds.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a speaker according to a first embodiment of the present invention. FIG. 2 is an enlarged sectional view showing the edge of the first embodiment of the present invention. FIG. 3 is an enlarged sectional view showing an edge of a second embodiment of the present invention. FIG. 4 is an enlarged sectional view showing a damper according to a third embodiment of the present invention. FIG. 5 is an enlarged sectional view showing a damper according to a fourth embodiment of the present invention. FIG. 6 is a characteristic diagram showing the stroke value with respect to the vibration load of the vibration system members of the speaker of the present invention, the conventional speaker A, and the conventional speaker B. FIG. 7 is a longitudinal sectional view showing a conventional speaker. 6 is a diaphragm, 8, 18, 28 are dampers, 9 is a frame,
10 and 20 are edges, 11 is a coating agent, and 21 is an impregnating agent.

Claims (1)

[Claims] 1. An edge and a damper are provided as support system members for emitting sound waves by the vibrations of the vibration system members and supporting the vibration system members with a frame, and an edge and a damper are provided in each of these support system members. A vibration system member is connected to the peripheral part, while
In a speaker in which a frame is connected to each outer circumference of the support system member, the hardness of at least one of the edge and the damper as the support system member varies from the outer circumference of the support system member to the inside of the support system member. A speaker characterized by a gradual decline toward the periphery.