▎ 摘　　要

NOVELTY - Sounding device vibrating diaphragm comprises silicone rubber membrane layer, and the silicone rubber membrane layer contains reticular polymer. The reticular polymer includes first segment and a second segment, and the first segment is siloxane compound (I). The second segment is 2-methoxybutane compound (II) USE - The vibrating diaphragm is useful in sounding device (claimed). ADVANTAGE - The sounding device vibrating diaphragm: utilizes polyether segment which has excellent flexibility; improves the resilience performance of silicone rubber, reduces creep, improves the waterproof reliability of the diaphragm, and meetes the needs of product use. DETAILED DESCRIPTION - Sounding device vibrating diaphragm comprises silicone rubber membrane layer, and the silicone rubber membrane layer contains reticular polymer. The reticular polymer includes first segment and a second segment, and the first segment is siloxane compound of formula (I). The second segment is 2-methoxybutane compound of formula (II). R1 and R2= methyl, ethyl, phenyl or trifluoropropyl; R group in the first segment= methyl, ethyl, phenyl, trifluoropropyl or vinyl; and R3=methyl, ethyl, phenyl, trifluoropropyl, ethyl or vinyl. INDEPENDENT CLAIMS are included for: 1. preparing sounding device vibrating diaphragm, comprising taking silicone rubber and polyether as the base polymer, adding fillers and auxiliary agents to the base polymer, and mixing to obtain mixed material, then vulcanizing the mixed material at high temperature to obtain silicone rubber film layer of the diaphragm, the silicone rubber is a straight-chain random polymer composed of main chain consisting of chain segment and terminated by side chain group, the segment one is siloxane compound of formula (III); and 2. sounding device comprising a vibration system and a magnetic circuit system matched with the vibration system, the vibration system includes a diaphragm and a voice coil combined on one side of the diaphragm, and the magnetic circuit system drives the voice coil to vibrate to drive the diaphragm to emit sound, the diaphragm is the diaphragm, or comprising a housing and a magnetic circuit system and a vibration system arranged in the housing, the vibration system includes a voice coil, a first diaphragm and a second diaphragm, the top of the voice coil is connected with the first diaphragm, the magnetic circuit system drives the voice coil to vibrate to drive the first diaphragm to emit sound, two ends of the second diaphragm are respectively connected with the bottom of the casing and the voice coil, the second diaphragm is the diaphragm.