COMBINATION DEVICE OF SPEAKER AND CAMERA OPTICAL SYSTEM
In the device according to this invention, a vibrating diaphragm and a magnetic conduction plate are improved, so that the vibrating diaphragm of the speaker, under the action of magnetic force excited by different electrical signals, can convert an acoustoelectric signal into voice, can resonate together with a coil, and can be as a movable lens to constitute an optical focusing/zooming system together with lens of the camera optical system, respectively, so that the space of the mobile terminal occupied by the combination device can be saved, and the sound quality of the speaker also can be improved.
1 . A device comprising:
a magnetic circuit system comprising a magnetic loop, an upper magnetic conduction plate, and a low magnetic conduction plate, said low magnetic conduction plate comprising a hollow structure;
a vibrating system comprising vibratable diaphragm and a coil, said vibratable diaphragm comprising a top dome being at least partially made of transparent material; and
an optical system including a lens and a photo-sensitive element;
wherein said vibratable diaphragm is adapted and arranged, together with the lens in said optical system to constitute an optical focusing system.
2 . The device according to claim 1 , further comprising a printed circuit board and an electrode/contact, wherein the vibratable diaphragm comprises a corrugated rim and wherein a first end of said coil is connected with said corrugated rim, and a second end of the coil is fixed to said printed circuit board through a retractable wire loop, and wherein said electrode/contact is an interface of said photo-sensitive element and said coil to an outer controlling circuit.
3 . The device according to claim 2 , wherein said coil, under the action of static magnetic force generatable in the magnetic circuit system, is adapted to move said top dome through said corrugated rim to displace, wherein the movement is determined by the driving algorithm provided by the outer controlling circuit, and is controllable by adjusting voltage/current intensity of a direct current suppliable from the electrode/contact, so that said top dome together with the lens in said optical system constitutes the optical focusing system.
4 . The device according to claim 2 , wherein when low frequency acoustoelectric signals are applied to said electrode/contact, said coil, under the action of alternative magnetic force generatable in said magnetic circuit system, is adapted to drive said top dome through said corrugated rim to vibrate.
5 . The device according to claim 2 , wherein when alternative electrical signals are applied to said electrode/contact, said coil, under the action of magnetic force generatable in the magnetic circuit system, is adapted to drive said top dome through said corrugated rim to reciprocate.
6 . The device according to claim 5 , wherein the frequency of said alternative electronic signal is identical with the resonance frequency of said vibrating system, the vibrating force generated by said vibrating system drives a housing provided with said combination device to vibrate, thereby achieving a speaker function.
7 . The device according to claim 6 , wherein the resonance frequency of said vibrating system is substantially determined by the compliance coefficient of said corrugated rim and the mass sum of said coil and said top dome.
8 . A mobile terminal equipment including the device according to claim 1 .