Sound device
The present disclosure discloses a sound device includes a frame, a magnet system, and a first vibration system and a second vibration system arranged on two sides of a magnet system. The magnet system includes a first central yoke, a central magnet mounted on the first central yoke, a side yoke surrounding the central magnet and fixed to the frame, and a connection portion connecting the first central yoke and the side yoke. The side yoke includes a first side yoke fixed to the frame and a second side yoke bending and extending from an edge of the first side yoke towards the central magnet; the connection portion connects the first central yoke and the second side yoke. The sound device in the present disclosure has higher magnetic ability and miniaturization ability.
1. A sound device comprising:
a frame with a receiving space;
a magnet system received in the receiving space, comprising:
a first central yoke located in a central position;
a central magnet mounted on the first central yoke;
a side yoke surrounding the central magnet to form a magnetic gap; and
a connection portion connecting the first central yoke and the side yoke;
a first vibration system arranged on one side of the magnet system, comprising:
a first diaphragm fixed to the frame; and
a first coil inserted in the magnetic gap and configured to drive the first diaphragm;
a second vibration system arranged on the other side of the magnet system, comprising:
a second diaphragm fixed to the frame; and
a second coil inserted in the magnetic gap and configured to drive the second diaphragm; wherein
the side yoke comprises a first side yoke fixed to the frame and a second side yoke bending and extending from an edge of the first side yoke towards the central magnet; the connection portion connects the first central yoke and the second side yoke.
2. The sound device as described in claim 1 , wherein the first side yoke extends along a vibration direction of the first diaphragm, the second side yoke extends along a direction perpendicular with the vibration direction; the first side yoke is perpendicular with the second side yoke.
3. The sound device as described in claim 2 , wherein the first side yoke is fixed to a surface of the frame facing the central magnet.
4. The sound device as described in claim 2 , wherein the second side yoke extends from an end of the first side yoke away from the first diaphragm.
5. The sound device as described in claim 2 , wherein the magnetic gap comprises a first magnetic gap formed between the central magnet and the first side yoke, and a second magnetic gap formed between the central magnet and the second side yoke; the first coil is inserted in the first magnetic gap; the second coil is inserted in the second magnetic gap.
6. The sound device as described in claim 5 , wherein the frame is in a rectangle shape; the connection portion connects an edge of the first central yoke along a short axis with an edge of the second side yoke along the short axis.
7. The sound device as described in claim 6 , wherein the connection portion comprises a first connection part connecting with the first central yoke, a second connection part connecting with the second side yoke, and a third connection part connecting the first connection part with the second connection part; the first connection part is fixed to a surface of the first central yoke facing the central magnet; the second connection part is fixed to a surface of the second side yoke facing the first central yoke.
8. The sound device as described in claim 7 , wherein the third connection part extends along the vibration direction.
9. The sound device as described in claim 1 , wherein the central magnet comprises a first magnet portion fixed to the first central yoke and a second magnet portion fixed to a surface of the first magnet portion away from the first central yoke; a projection area of the first magnet portion along a vibration direction of the first diaphragm is larger than a projection area of the second magnet portion along the vibration direction.
10. The sound device as described in claim 9 , wherein the magnet system further comprises a second central yoke fixed to a surface of the second magnet portion away from the first central yoke.