JPH0424710Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Purpose of the Invention" (Field of Industrial Application) The present invention relates to a corrugation damper for a speaker, and in particular to a damper that is optimal for limiting amplitude in a high-power speaker.

(Prior art) Conventional speaker dampers, especially corrugation dampers for limiting the amplitude of the vibration system, are
It is configured as shown in Figures A and B.

In the figure, reference numeral 11 indicates the whole damper, in which an adhesive part 12 formed on the inner circumference is bonded to the coil bobbin 15, and a mounting part 13 formed on the outer circumference.
is fixed to a mounting member 16 such as a top plate. In this case, as shown in FIG. 3A, there is a rising damper in which the adhesive part 12 is located closer to the front side than the mounting part 13, and as shown in FIG. 3B, the adhesive part 12 and the mounting part 13 are Although there is a flat damper with the same height, the corrugations 14 to be formed on the damper 11 are a series of small corrugations with a wave height of 14h.

(Problem that the invention aims to solve) Recently, high-power compatible speakers have been widely used, but in these high-power compatible speakers, it is necessary to set an appropriate damper based on the amplitude at the allowable input resistance. Corrugation wave height is set.
This wave height setting reduces the overall wave height of the corrugation to limit the amplitude in order to prevent the damper from elongating excessively during large amplitudes and causing abnormal noise when it hits the top plate and other mounting members. There is a need.

In a damper with a series of corrugations of the same height, such as the conventional corrugation damper mentioned above, if you try to limit the amplitude by reducing the corrugation of the entire damper, the innermost circumference of the corrugation will be the voice coil. Since the outer periphery is fixed to each mounting member, the innermost corrugation part and the outermost corrugation part are difficult to stretch, and for this reason, when the corrugation is forced to stretch during large amplitudes, it may partially collapse and deteriorate linearity. There are drawbacks such as noise and noise.

Moreover, if the entire corrugation 14 is made smaller, as shown in FIG. 4, when assembling the adhesive part 12 to the coil bobbin 15, there is a problem that the adhesive 17 flows down over the innermost peak part and into the valley part 17a. However, if the amount of adhesive is reduced to avoid this problem, there are drawbacks such as insufficient adhesive strength.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks,
Even if the damper has a large amplitude, there is no risk of the corrugation being partially crushed or deformed, linearity can be ensured and no abnormal noise is produced, and the bonding area to the coil bobbin is large. An object of the present invention is to provide a damper for a speaker that can obtain sufficient adhesive strength.

"Structure of the invention" (Means for solving the problems) The speaker damper according to the invention is a corrugation damper in which the corrugations formed at the inner and outer circumferences are separated from the corrugations formed at the center. It is also shaped to increase the wave height.

In addition, it is possible to further regulate the amplitude by forming a flat part between the corrugations having small wave heights formed in the center part.

(Function) The corrugations formed on the inner and outer peripheries have larger wave heights than the corrugations formed in the center, so even with large amplitudes, the corrugations may partially collapse or deform. This improves linearity and does not produce abnormal noises unlike conventional products.

Since the innermost peak of the corrugation is high, the adhesive will not run down when bonding the adhesive part to the coil bobbin, and the bonding area will be large, ensuring sufficient adhesive strength. .

(Example) An example of the damper for a speaker according to the present invention will be explained based on FIGS. 1 and 2. FIGS. Examples of dampers: B is an example of a flat damper. FIGS. 2A and 2B are cross-sectional views showing examples of rising dampers in which the shape of the bonded portion is different.

In the figure, reference numeral 1 indicates the entire corrugation damper, and reference numeral 2 indicates an adhesive portion formed at the innermost peripheral edge, which is adhered to the coil bobbin 8. A mounting portion 3 is formed on the outermost edge and is fixed to a mounting member 9 such as a top plate. These structures are the same as those of the conventional ones, but in the present invention, the corrugation damper 1 has a wave height of 45 h of the corrugations 4a and 5a formed on the inner peripheral part 4 and the outer peripheral part 5.
is formed to be larger than the wave height 6h of the corrugation 6a formed in the central portion 6.

The overall amplitude can be limited by reducing the size of the corrugation 6a in the center, but
Furthermore, in order to regulate the amplitude, a flat portion 7 is formed between the corrugations 6a, 6a in the embodiment. In addition, in the figure, 10 indicates an adhesive.

In Fig. 2A, corrugation damper 1
The adhesive part 2 is formed upward, as shown in Fig. 2B.
It is horizontal at .

"Effect of the invention" According to the speaker according to the invention, the overall amplitude can be limited by the small corrugation part at the center, and the corrugations formed at the inner and outer circumferences are larger than the corrugations formed at the center. The wave height is increased, so even if the wave amplitude is large, the corrugation on the inner or outer circumference will not be partially crushed or deformed, and linearity can be improved, unlike the conventional one. It also doesn't make any strange noises.

Since the innermost peak of the corrugation is high, the adhesive will not flow down even when bonding the adhesive part to the coil bobbin, and the bonding area will be large, ensuring sufficient adhesive strength. .

In addition, in a high-power compatible speaker unit, with a conventional damper structure in which corrugations of the same wave height are connected, if the wave height is set to a level that does not cause crushing or deformation of the corrugation portions on the inner and outer peripheries, the damper will not be effective at large amplitudes. In some cases, the edge portion of the speaker becomes tense, causing abnormal noise, but this can also be prevented with the device of the present invention.

[Brief explanation of the drawing]

1 and 2 show an embodiment of a speaker damper according to the present invention, and FIGS. 1A and 1B are cross-sectional views showing how the damper is installed, where A is an example of a rising damper and B is an example of a flat damper. This is an example of a damper. FIGS. 2A and 2B are cross-sectional views showing examples of rising dampers in which the shape of the bonded portion is different. 3A and 3B are cross-sectional views showing conventional corrugation dampers, where A is an example of a rising damper and B is an example of a flat damper. FIG. 4 is a sectional view showing an adhesive structure in a conventional corrugation damper. 1... Entire corrugation damper, 4... Inner periphery, 4a... Corrugation in inner periphery, 5...
Outer periphery, 5a...corrugation of outer periphery, 6...
...Central part, 6a...Central part corrugation, 4
5h...Wave height of inner and outer corrugation, 6h...
Wave height of central corrugation, 7...flat part.

Claims (1)

[Scope of utility model registration request] 1. A corrugation damper for a speaker, characterized in that corrugations formed on an inner circumferential portion and an outer circumferential portion are formed to have larger wave heights than corrugations formed in a central portion.