发明名称 |
Watch with electronic buzzer |
摘要 |
A waterproof acoustic vibrator for a timepiece and comprising a waterproof housing and a plate-like member having a magnetic portion. The plate-like member is mounted for oscillation opposite the waterproof housing and is maintained in a rest position by first magnetic biasing structure. Second magnetic biasing structure magnetically biases the plate-like member to oscillate and develop audible acoustic waves. The first magnetic biasing structure is a permanent magnet, and the second magnetic biasing structure is an electromagnet disposed within the waterproof housing.
|
申请公布号 |
US4167849(A) |
申请公布日期 |
1979.09.18 |
申请号 |
US19770852548 |
申请日期 |
1977.11.17 |
申请人 |
KABUSHIKI KAISHA DAINI SEIKOSHA |
发明人 |
TAKAHASHI, KEIKICHI |
分类号 |
G04C21/02;G10K9/12;G10K9/13;G10K9/22;(IPC1-7):G04B23/12 |
主分类号 |
G04C21/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|