Bone conduction speaker and compound vibration device thereof
The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader.
1. A bone conduction speaker, comprising:
a vibration device comprising a vibration conductive plate and a vibration board, wherein
the vibration conductive plate is physically connected with the vibration board, vibrations generated by the vibration conductive plate and the vibration board have at least two resonance peaks, frequencies of the at least two resonance peaks being catchable with human ears, and sounds are generated by the vibrations transferred through a human bone; and
a magnetic connector configured to charge the bone conduction speaker when the magnetic connector absorbs a charging interface of an external power source.
2. The bone conduction speaker according to claim 1 , wherein the magnetic connector comprises:
a magnetic adsorption ring;
an insulation base including a plurality of accommodation holes, at least part of the insulation base being inserted into the magnetic adsorption ring; and
a plurality of terminals each of which is accommodated in one of the plurality of accommodation holes.
3. The bone conduction speaker according to claim 2 , wherein
the insulation base includes a supporting member and an insertion member,
a cross section of the supporting member is greater than that of the insertion member, and
the magnetic adsorption ring is inserted into an accommodation space formed by the supporting member and the insertion member.
4. The bone conduction speaker according to claim 3 , wherein the magnetic connector further comprises a housing for accommodating the magnetic adsorption ring and the insulation base.
5. The bone conduction speaker according to claim 4 , wherein
the housing includes a body and a flange at an end of the body,
the body is sleeved on the insulation base and the magnetic adsorption ring, and
the flange covers an end of the magnetic adsorption ring.
6. The bone conduction speaker according to of claim 5 , wherein an outer circumference wall of the supporting member and an inner circumference wall of the body are mechanically connected via a buckle connection.
7. The bone conduction speaker according to claim 6 , wherein
two through grooves are located on two opposite surfaces of an outer peripheral wall of the body, respectively, and
the supporting member includes two buckles matching the two through grooves.
8. The bone conduction speaker according to claim 7 , wherein the housing is sleeved on the supporting member of the insulation base via the buckle connections between the two through grooves and the two buckles.
9. The bone conduction speaker according to claim 2 , wherein
the magnetic adsorption ring has a shape of a circle, and
each of the plurality of terminals has a contact surface that is concentric with the magnetic adsorption ring.
10. The bone conduction speaker according to claim 2 , wherein
the magnetic adsorption ring is rotational symmetry with respect to a rotation center, and
a length of the magnetic adsorption ring along a first direction is different from a length of the magnetic adsorption ring along a second direction, the first direction and the second direction being perpendicular to each other at the rotation center.
11. The bone conduction speaker according to claim 2 , wherein the magnetic adsorption ring includes a plurality of ring sections, and at least one pair of adjacent ring sections of the plurality of ring sections have different magnetic polarities at their respective end surfaces.
12. The bone conduction speaker according to claim 1 , wherein the vibration conductive plate includes a first torus and at least two first rods, the at least two first rods converging to a center of the first torus.
13. The bone conduction speaker according to claim 12 , wherein the vibration board includes a second torus and at least two second rods, the at least two second rods converging to a center of the second torus.
14. The bone conduction speaker according to claim 13 , wherein the first torus is fixed on a magnetic component.
15. The bone conduction speaker according to claim 14 , further comprising a voice coil, wherein the voice coil is driven by the magnetic component and fixed on the second torus.
16. The bone conduction speaker according to claim 15 , wherein the at least two first rods are staggered with the at least two second rods.
17. The bone conduction speaker according to claim 16 , wherein a staggered angle between one of the at least two first rods and one of the at least two second rods is 60 degrees.
18. The bone conduction speaker according to claim 15 , wherein the magnetic component comprises:
a bottom plate;
an annular magnet attaching to the bottom plate;
an inner magnet concentrically disposed inside the annular magnet;
an inner magnetic conductive plate attaching to the inner magnet;
an annular magnetic conductive plate attaching to the annular magnet; and
a grommet attaching to the annular magnetic conductive plate.
19. The bone conduction speaker according to claim 1 , wherein a lower resonance peak of the at least two resonance peaks is equal to or lower than 900 Hz.
20. The bone conduction speaker according to claim 19 , wherein a higher resonance peak of the at least two resonance peaks is equal to or lower than 9500 Hz.