Diaphragm and micro sound generator provided with the same

A pattern and projection surface technology, applied in the direction of non-planar diaphragm/cone, sensor, diaphragm structure, etc., can solve the problems of low sensitivity of micro-sounders, easy wrinkles at the four corners, high harmonic distortion, etc., to achieve Improved reliability margin, large reliability margin, and small high-order harmonic distortion

Active Publication Date: 2020-07-03
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. When the diaphragm vibrates at a large displacement, it will vibrate, the vibration is not stable, and noise is easy to appear;
[0005] 2. The compliance of the diaphragm is low, resulting in low sensitivity and poor acoustic performance of the miniature sound generator;
[0006] 3. Wrinkles tend to appear at the four corners of the diaphragm when it vibrates, resulting in higher harmonic distortion. At the same time, it will also make the ring part of the diaphragm fatigue, making it difficult to pass the reliability test.

Method used

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  • Diaphragm and micro sound generator provided with the same
  • Diaphragm and micro sound generator provided with the same
  • Diaphragm and micro sound generator provided with the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 and figure 2 Commonly shown, a diaphragm includes a central part 14 , a ring part 12 and a fixed part 10 which are sequentially connected as one from the inside to the outside. The ring portion 12 includes an arc corner and a first side and a second side connected by the arc corner. Patterns are distributed on the ring part 12, and in the orthographic projection plane of the diaphragm, the patterns include at least one first pattern 20a arranged on the inside of the ring near the central part 14, and at least one first pattern 20a arranged on the outside of the ring near the fixed part 10. At least one second pattern 22a. The first pattern 20a is radially distributed from the inner edge of the ring portion 12 to the middle part of the ring portion 12, the second pattern 22a is radially distributed from the outer edge of the ring portion 12 to the middle part of the ring portion 12, and the first pattern 20a and the second pattern 22a do not interfer...

Embodiment 2

[0048] This embodiment is basically the same as Embodiment 1, the difference is that:

[0049] Such as image 3 and Figure 4 Commonly shown, in the orthographic projection plane of the diaphragm, only the first pattern 20b is provided on the inside of the arc-shaped corner, and the second pattern 22b and the fourth pattern 26 are provided on the outside of the arc-shaped corner, and the fourth pattern 26 is arranged on each The middle position of the second pattern 22b, that is, the fourth pattern 26 is arranged at the center position outside the arc-shaped corner. The fourth pattern 26 is also a linear pattern, extending from the fixed part 10 to the central part 14, and extending to the middle of the arc-shaped corner. The second pattern 22b on the side is distributed symmetrically with respect to the fourth pattern 26. In this embodiment, the second pattern 22b on both sides of the fourth pattern 26 protrudes toward the direction close to the fourth pattern 26. At this t...

Embodiment 3

[0054] A miniature sound generator includes a vibrating system and a magnetic circuit system. The vibrating system includes a vibrating membrane and a voice coil combined together. The vibrating membrane is the vibrating membrane described in Embodiment 1 and Embodiment 2.

[0055] Since the micro-speaker of the present invention adopts the diaphragm described in Embodiment 1 and Embodiment 2, it has the advantages of no noise, high sensitivity, low harmonic distortion, high sound quality, and large reliability margin.

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PUM

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Abstract

The present invention relates to the technical field of electroacoustic products. Disclosed are a diaphragm and a micro speaker provided with the same. The diaphragm comprises a central portion, a ring portion, and a fixing portion which are sequentially connected from inside to outside. The ring portion includes patterns arranged therein. In a frontal projection plane of the diaphragm, the patterns include one or more first patterns arranged at an inner side of the ring portion close to the central portion and one or more second patterns arranged at an outer side of the ring portion close to the fixing portion. Both the first patterns and the second patterns are distributed radially and are crescent-shaped. In the diaphragm and the micro speaker provided with the same, the diaphragm oscillates stably, has high compliance and fatigue resistance, and is less likely to form creases thereon. Accordingly, the micro speaker has high sensitivity, less distortion and a large reliability margin.

Description

technical field [0001] The invention relates to the technical field of electroacoustic products, in particular to a vibrating membrane and a miniature sound generator provided with the vibrating membrane. Background technique [0002] Miniature sound generator is an important acoustic component in portable electronic equipment, which is used to convert sound wave electric signal into sound signal, and is an energy conversion device. The micro sounder usually includes a vibration system and a magnetic circuit system. The vibration system includes a diaphragm and a voice coil combined together. The diaphragm includes a central part, a ring part and a fixed part that are sequentially combined from the inside to the outside. Important components play a vital role in the sound reproduction performance of the micro-sounder, which determines the conversion quality of the micro-sounder from electrical energy to sound energy. [0003] The pattern of the surround portion of the exist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R7/14H04R9/02H04R9/06
CPCH04R7/14H04R9/025H04R9/06
Inventor 李柯何超锋宋健赵国栋
Owner GOERTEK INC
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