Vibrating diaphragm and loudspeaker

Abstract

The invention discloses a vibrating diaphragm and loudspeaker, wherein the vibrating diaphragm includes an intermediate part and a folding ring part surrounding the periphery of the intermediate part,the folding ring part includes a first straight side part, a second straight side part, and an arc-shaped corner part connecting the first straight side part and the second straight side part, the arc-shaped corner part and end parts of the first straight side part and the second straight side part which are connected with the arc-shaped corner part form a corner area; a pattern is arranged on the corner area, the pattern extends in an up-down undulating shape along a surrounding direction of the folding ring part in the position of the pattern and has a plurality of crest lines and trough lines, the cross section of the pattern along the surrounding direction of the folding ring part in the position of the pattern is arranged to be a continuously bent smooth curve, and the smooth curve has a plurality of crest lines and trough lines. Through the technical scheme of the invention, the stress concentration phenomenon of the folding ring part of the vibrating diaphragm can be reduced and the performance reliability and acoustic performance of the loudspeaker can be improved.

Description

technical field [0001] The invention relates to the field of electroacoustic technology, in particular to a vibrating membrane and a loudspeaker. Background technique [0002] At present, with the development of the use of loudspeakers, especially mobile phone smart-pa, etc., the loudspeakers are required to be used under the condition of large amplitude and to ensure the reliability of performance at the same time. In the design of the speaker, the design of the diaphragm is very critical, and its design has a great impact on the total harmonic distortion, listening and reliability of the product. However, in the design of the diaphragm, if stress concentration occurs, it is easy to cause rupture of the diaphragm. For example, in the current common design scheme with double rows of patterns on the diaphragm ring part, refer to Figure 5 , stress concentration is prone to occur at the junction of double-row patterns, especially at the corners. In the design scheme with sing...

AI Technical Summary

Problems solved by technology

However, in the design of the diaphragm, if there is stress concentration, it is easy to cause the diaphragm to break

For example, in the current common design scheme with double rows of patterns on the diaphragm ring part, refer to Figure 5 , stress concentration is prone to occur at the junction of double-row patterns, especially at the corners. In the design scheme with single-row patterns on the diaphragm ring, refer to Image 6 , Stress concentration is also prone to occur at the bottom of the depression of the pattern, especially at the bottom of the most corner of the pattern. The cause of the stress concentration phenomenon, refer to Figure 7 , Figure 8 The cross-sectional view of the pattern in the circle along the direction of the ring part. The cross-sectional views of the two patterns are similar. In the case of no pattern, the cross-section of the corner area of ​​the ring part will be a straight line or a straight line. In the case of a pattern, a plurality of depressions are formed on the straight line of the cross section, and the final cross section is a half-wave structure composed of a straight line segment and a concave curve. The difference between the straight line segment and the concave curve is large, resulting in stress concentration.

In the case of these two pattern designs, the maximum stress can reach 15-20Mpa. In these areas, the reliability of the diaphragm will be affected due to stress concentration, and it is easy to cause membrane rupture or delamination. Affects the acoustic performance of loudspeakers

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