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
at least one button disposed on a housing of the bone conduction speaker, wherein each of the at least one button corresponds to a button hole disposed on the housing.
2. The bone conduction speaker according to claim 1 , further comprising:
at least one elastic pad corresponding to the at least one button, respectively, wherein each elastic pad prevents the corresponding button from moving relative to the button hole.
3. The bone conduction speaker according to claim 2 , further comprising a circuit housing including an accommodating body and a cover, wherein
a cavity having an opening at one end of the accommodating body is disposed on the accommodating body, and
the cover covers on the opening of the cavity to seal the cavity.
4. The bone conduction speaker according to claim 3 , wherein the elastic pad is disposed on a first recessed region, and a second recessed region corresponding to the button hole is set on the elastic pad, the second recesses region extending to an inside of the button hole.
5. The bone conduction speaker according to claim 4 , wherein the circuit housing further includes a main sidewall and an auxiliary sidewall connected to the main sidewall, wherein the first recessed region is disposed on an outer surface of the auxiliary side wall.
6. The bone conduction speaker according to claim 5 , further comprising:
an auxiliary piece, wherein the auxiliary piece includes a board.
7. The bone conduction speaker according to claim 6 , wherein
a hollowed region is disposed on the board, and
a mounting hole is disposed on the main sidewall and located inside the hollowed region.
8. The bone conduction speaker according to claim 7 , further comprising:
a conductive column inserted into the mounting hole, wherein a glue groove is formed at a periphery of the conductive column.
9. The bone conduction speaker according to claim 8 , wherein a notch is disposed in the hollowed region of the auxiliary piece, and a first strip rib is integrally formed on an inner surface of the main sidewall corresponding to the notch, wherein the first strip rib and the auxiliary piece cooperate to make the glue groove closed.
10. The bone conduction speaker according to claim 4 , wherein the at least one button includes a button body and a button contact point, wherein
the button body is disposed on a side of the elastic pad away from the circuit housing, and
the button contact point extends to an inside of the second recessed region.
11. The bone conduction speaker according to claim 10 , wherein the circuit housing further includes a button circuit board, and a button switch corresponding to the button hole is set on the button circuit board, wherein
when the user presses the at least one button, the button contact point contacts and triggers the button switch.
12. The bone conduction speaker according to claim 10 , wherein the at least one button includes at least two button single bodies disposed away from each other, and a connecting portion connected to the at least two button single bodies, wherein
the button contact point is set on each of the at least two button single bodies, and
an elastic bump for supporting the connecting portion is set on the elastic pad.
13. The bone conduction speaker according to claim 4 , further comprising a rigid pad disposed between the elastic pad and the circuit housing, wherein
a through hole is disposed on the rigid pad, and
the second recessed region further extends to the inside of the button hole through the through hole.
14. The bone conduction speaker according to claim 13 , wherein the elastic pad and the rigid pad abut each other.
15. The bone conduction speaker according to claim 3 , further comprising:
a housing casing covering a periphery of the circuit housing and a periphery of the at least one button.
16. The bone conduction speaker according to claim 15 , wherein
the housing casing has a bag-shaped structure with one end open, and
the circuit housing and the at least one button enter an inside of the housing casing through the open end.
17. The bone conduction speaker according to claim 16 , wherein an annular flange protruding inward is disposed on the open end of the housing casing, and an end of the circuit housing has a stair shape and forms an annular platform, wherein when the housing casing covers the periphery of the circuit housing, the annular flange is in contact with the annular platform.
18. The bone conduction speaker according to claim 17 , wherein a sealant is applied in a joint region of the annular flange and the annular platform to firmly connect the housing casing with the circuit housing.
19. The vibration device 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.
20. The vibration device according to claim 19 , 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.