Diaphragm and speaker

Abstract

The invention discloses a vibrating membrane and a loudspeaker, wherein the vibrating membrane includes a middle part and a protruding ring part surrounding the outer periphery of the middle part, and the ring part includes a first straight side part and a second straight side portion, and an arc-shaped corner portion connecting the first straight-edge portion and the second straight-edge portion, the arc-shaped corner portion and the ends of the first straight-edge portion and the second straight-edge portion connected thereto form a corner area; There is a pattern on the corner area, and the pattern extends in an undulating wave shape along the surrounding direction of the ring portion where it is located. The pattern has a plurality of crest lines and trough lines, and the pattern along the The surrounding section of the ring portion at its position is arranged as a continuously bent smooth curve, and the smooth curve has a plurality of crests and troughs. The technical solution of the invention can reduce the stress concentration phenomenon of the ring part of the vibrating membrane, and improve the performance reliability and acoustic performance of the loudspeaker.

Description

technical field [0001] The invention relates to the technical field of electro-acoustics, in particular to a diaphragm and a loudspeaker. Background technique [0002] At present, with the development of loudspeakers, especially mobile phone smart-pa, etc., loudspeakers are required to be used in the case of large amplitude and can guarantee the reliability of performance at the same time. In the design of loudspeakers, the design of the diaphragm is very critical, and the quality of its design has a huge 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 break the diaphragm. For example, in the currently common design scheme with double-row patterns on the ring portion of the diaphragm, refer to Figure 5 , stress concentration is prone to occur at the junction of double-row patterns, especially at the most corners. In the design scheme with single-row pat...

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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