JPS5950698A - Center suspension for speaker - Google Patents

Abstract

PURPOSE:To obtain an excellent linearity to a driving force, by providing a corrugation having a crest or a trough on a radius along a circumference in addiation to a concentric corrugation having a crest or a trough along a radial direction. CONSTITUTION:The concentric corrugation 3 is constituted in a center suspension for a speaker, and for example, four trough corrugations 5 and four crest corrugations 6 are provided on the radial line. Further, the corrugations 5, 6 are arranged alternately on the circumference. The width of the corrugations 5, 6 is formed to be wider gradually from the inner circumference toward the outer circumference. The expanding and contracting performance toward radial and an circumferential direction is improved even at a small diameter through the constitution in this way and the linearity of displacement to the drive force is improved. Further, the symmetry of displacement toward a positive and a negative direction is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a center suspension for a speaker that supports a voice coil of the speaker.

[Technical background of the invention and its problems] Fig. 1 shows a conventional speaker center suspension engine, which has a corrugated suspension concentrically extending in the radial direction and forming a plurality of peaks and valleys. . This type of center suspension suspension is currently used in the majority of speaker units, but when the amplitude becomes large, sufficient linearity is not compensated for, causing support system distortion. The following are possible reasons why this center suspension system causes distortion when the amplitude is large.

FIG. 2 shows a state in which the center suspension valve is at an equilibrium point (solid line) and a state in which it is displaced. Here, one point A in the equilibrium state moves to λ' after displacement, and at this time it expands by Δ' in the radial direction.In this way, the circumference including the λ point must extend by 2πΔ', but this shape Center suspension suspension has poor elasticity in the circumferential direction, and does not expand linearly in response to force.As a result, displacement in response to driving force cannot maintain linearity, and distortion of the support system. occurs.In order to alleviate the poor linearity of this support system,
A method of increasing the diameter of the center suspension has also been adopted, but as the diameter of the center suspension increases, the surface area as a sound wave radiator also increases, resulting in the emission of more sound that has a negative effect on sound quality. This is a particular problem.

[Purpose of the Invention] This invention has been made in view of the above points, and provides a speaker that compensates for expansion and contraction in the radial and circumferential directions, has a small diameter, has less distortion, and does not emit harmful sound in terms of sound quality. The purpose is to provide a center suspension for.

[Summary of the Invention] The present invention provides, in addition to a concentric corrugation having a plurality of concentric peaks and valleys along the radial direction, a radial corrugation having peaks or valleys along the circumferential direction in the center suspension of a speaker. It consists of a plurality of them and compensates for expansion and contraction in the radial direction and the circumferential direction.

[Embodiments of the Invention] Hereinafter, the present invention will be described in detail with reference to the drawings.0 Fig. 3 shows a center suspension according to an embodiment of the present invention, (a) is a top plan view, and (b) is a view taken along A-A. (C) is a cross-sectional view taken along line B-B'.

The center suspension of this embodiment has a concentric corrugation 3, four valley-shaped corrugations 5 on the radius as shown in FIG. 4, and four chevron-shaped corrugations on the radius as shown in FIG. 6, and the valley-shaped corrugage holes 5 on the radius and the chevron-shaped corrugage holes 6 on the radius are alternately arranged on the circumference.

Furthermore, the widths of the radial valley-shaped corrugations 5 and the radial chevron-shaped corrugations 6 are formed to gradually become wider from the inner circumference toward the outer circumference.

The center suspension configured in this way has a valley-shaped corrugation 5 on the radius and a chevron-shaped corrugation four 6 on the radius.
The section has corrugations in the radial and circumferential directions. In addition, the innermost concentric corrugation 3
The side of the joining portion 2 with the voice coil bobbin is configured not to have corrugations 5.6 on the radius so as not to cause any inconvenience when bonding with the voice coil bobbin 4.

[Effects of the Invention] By configuring the center suspension in this way, even if the diameter is small, the elasticity in the radial direction and the circumferential direction is good, and the linearity of displacement with respect to the driving force is good. In addition, by alternately arranging the radial valley-shaped corrugated holes 5 and the radial chevron-shaped corrugated holes 6 on the circumference, good displacement symmetry in the positive and negative directions is achieved.

Furthermore, by gradually widening the widths of the valley-shaped corrugations 5 on the radius and the chevron-shaped corrugations 6 on the radius from the inner circumference toward the outer circumference, the strain distribution when forming the center suspension changes greatly. [Other Embodiments of the Invention] In the above embodiments, both a radial valley-shaped corrugation hole and a chevron-shaped corrugation hole were formed, but if only one of them was formed, Even if it is formed, the desired effect can be obtained. In addition, when forming both the radial valley-shaped corrugations 5 and the radial chevron-shaped corrugations 6, if the number of each increases, two or three corrugations may be arranged alternately along the circumferential direction. You can also get the same effect.

[Brief explanation of drawings]

Fig. 1 shows a conventional center suspension valve for speakers, and Fig. 2 shows that when the voice coil bobbin is displaced,
A diagram for explaining expansion and contraction of the center suspension, FIG. 3 is a diagram showing a center suspension according to an embodiment of the present invention, and FIGS. 4 and 5 are perspective views of a part of the center suspension in FIG. 3, respectively. . 1... Outer circumferential portion of the center suspension, 2... Joint portion with the voice coil bobbin. 3...Concentric circular corrugage string, 4...Voice coil bobbin, 5...Radius top hook type corrugage ring, 6...Radius top chevron type corrugage string. Figure 1 (Muno Figure 2 Figure 8

Claims (3)

[Claims] (1) It is characterized by having a concentric corrugation ring that forms a plurality of peaks and valleys along the radial direction, and a plurality of radial corrugation lines that form mountains or valleys along the circumferential direction VC. Center suspension for loudspeakers. (2) A patent claim characterized in that a plurality of radial corrugations are arranged alternately on the circumference, with those having ridges and those having valleys along the circumferential direction. Range Center suspension for speakers listed in item 1〇 (3) Claim 1 characterized in that the width of the radial corrugage constituting the peaks or valleys along the circumferential direction gradually increases from the inner circumference to the outer circumference. Center suspension for speakers as described in section.