| 摘要 |
A miniature electroacoustic transducer includes: a metal shell, having the shape of a barrel with one open end; a vibrating system, including a vibrating diaphragm and a voice coil; and a magnetic circuit system, including a concentrating flux plate, a magnet and a magnetic yoke that are sequentially combined together. The magnetic circuit system is formed with a magnetic gap corresponding to the voice coil; the vibrating system and the magnetic circuit system are fixedly installed in the barrel-shaped shell; the components in the structure are further modularized, maximizing the magnet under the same product dimension and effectively improving the product sensitivity. An assembling method of the electroacoustic transducer includes: a. providing a barrel-shaped metal shell with one open end; b. putting a pre-assembled vibrating system into the shell; c. putting a pre-assembled magnetic circuit system into the shell; and d. fixedly assembling the shell with the magnetic yoke. |
| 主权项 |
1. A miniature electroacoustic transducer, comprising:
a shell comprising a metal part, bent at a transition region, defining a bottom of the shell and a sidewall of the shell, the metal part having a first thickness between a first inner surface of the bottom of the shell and an outer surface of the bottom of shell and a second thickness, less than the first thickness, between a second inner surface of the bottom of the shell and the outer surface of the bottom of the shell; a vibrating system, comprising a vibrating diaphragm and a voice coil; and a magnetic circuit system, comprising a concentrating flux plate, a magnet and a magnetic yoke, wherein
the magnetic circuit system has a magnetic gap corresponding to the voice coil,the vibrating system and the magnetic circuit system are fixedly installed in the shell,the second inner surface of the bottom of the shell is closer to the sidewall of the shell than the first inner surface of the bottom of the shell,the first inner surface of the bottom of the shell is connected to the second inner surface of the bottom of the shell by a trench sidewall, andthe trench sidewall, the second inner surface of the bottom of the shell and the sidewall of the bottom of the shell define a transition trench proximate to the sidewall of the shell. |
