Electromechanical transducer with mechanical advantage

Patent metadata

Field	Value
Publication number	US-10448136-B2
Application number	US-201715412762-A
Country	US
Kind code	B2
Filing date	Jan 23, 2017
Priority date	Dec 7, 2011
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A vibratory apparatus including a lever arm apparatus including a living hinge, wherein the vibratory apparatus is configured such that at least a portion of the lever arm moves about the living hinge when the vibratory apparatus is generating vibrations.

First claim

What is claimed is:

1. A device, comprising:
an actuator-seismic mass assembly; and
a resilient apparatus interposed between the assembly and a static component of the device, wherein
the device is a bone conduction device configured such that actuation of an actuator of the assembly moves a seismic mass of the assembly in a vibratory manner, and
the resilient apparatus is an amalgamation of solid elements and a separate substance.

2. The device of claim 1 , wherein:
the resilient apparatus is an amalgamation of a gel and solid particles, the solid elements being the solid particles, and the separate substance being the gel.

3. The device of claim 1 , wherein:
the resilient apparatus is an amalgamation of silicone and solid beads, the solid elements being the solid beads, and the separate substance being the silicone.

4. The device of claim 3 , wherein:
silicone and solid beads is a mixture, wherein the solid beads in the mixture have a distribution of 1.0 to about 0.1.

5. The device of claim 1 , wherein:
the static component is a housing wall of the device; and
a gap between the assembly and the housing wall of the device is substantially filled with the resilient apparatus.

6. The device of claim 5 , wherein:
the resilient apparatus is an amalgamation of silicone and solid beads, the solid elements being the solid beads, and the separate substance being the silicone.

7. The device of claim 5 , wherein:
the resilient apparatus is an amalgamation of silicone and glass beads, the solid elements being the glass beads, and the separate substance being the silicone.

8. The device of claim 5 , wherein:
the resilient apparatus is attached to the actuator-seismic mass assembly.

9. The device of claim 1 , wherein:
a gap between the assembly and a housing wall of the device is filled with the resilient apparatus.

10. The device of claim 1 , wherein:
the actuator-seismic mass assembly includes a piezoelectric actuator, corresponding to the actuator of the assembly, and the seismic mass, and wherein actuation of the piezoelectric actuator moves the seismic mass to generate vibrations.

11. The device of claim 1 , wherein:
the static component is a housing wall of the device; and
the resilient apparatus is located in a gap between the assembly and the housing wall of the device.

12. The device of claim 1 , wherein:
the resilient apparatus is configured to function as a damper of the actuator-seismic mass assembly, wherein the solid elements are beads, and the separate substance is a substance that is substantially more flexible than the beads.

13. A vibratory apparatus, comprising:
a lever arm apparatus configured to move about a hinge in an oscillatory manner; and
a dampener attached to the lever arm apparatus configured to dampen a resonance peak frequency of the vibratory apparatus.

14. The vibratory apparatus of claim 13 , wherein:
the lever arm apparatus is configured to move along an arcuate trajectory about a hinge in an oscillatory manner; and
the dampener is attached to the lever arm apparatus at a side thereof such that the dampener is subjected to shear stress upon movement of the lever arm along the arcuate trajectory.

15. The vibratory apparatus of claim 13 , wherein:
the dampener is configured to dampen the resonance peak frequency without effectively reducing a power output of the vibratory apparatus at frequencies remote from the resonance peak frequency.

16. The vibratory apparatus of claim 13 , wherein:
the dampener is a mixture of silicone gel and glass beads.

17. The vibratory apparatus of claim 16 , wherein:
at least one of:
a ratio of silicone gel to glass beads by volume;
an individual glass bead volume distribution; or
a surface area of the dampener in contact with the lever arm apparatus,

is such that the dampener dampens the resonance peak frequency of the vibratory apparatus without effectively reducing energy output of the vibratory apparatus at frequencies remote from and below the resonance peak frequency.

18. The vibratory apparatus of claim 13 , further comprising:
a second dampener configured to dampen a second fundamental resonance peak frequency different from the resonance peak frequency, wherein the second dampener is positioned at a side of the lever arm apparatus such that the oscillatory movement compresses the second dampener.

19. A device, comprising:
an actuator-seismic mass assembly; and
an apparatus interposed between the assembly and a static component of the device, wherein
the device is a bone conduction device configured such that actuation of an actuator of the assembly moves a seismic mass of the actuator in a vibratory manner to generate vibrations to evoke bone conduction hearing percepts, and
the apparatus significantly limits movement of the assembly.

20. The device of claim 19 , wherein:
the actuator-seismic mass assembly includes a piezoelectric actuator; and
the device is configured to significantly limit backlash associated with the piezoelectric actuator of the actuator-seismic mass assembly.

21. The device of claim 19 , wherein:
the actuator-seismic mass assembly includes a piezoelectric actuator; and
the device is configured such that the apparatus limits an amount of compression of the piezoelectric actuator.

22. The device of claim 19 , wherein:
the actuator-seismic mass assembly includes a piezoelectric actuator;
the apparatus is interposed between the actuator-seismic mass assembly and a housing wall of the device; and
the device is configured such that the apparatus limits an amount of extension of the piezoelectric actuator.

23. The device of claim 19 , wherein:
the apparatus is a mixture of a gel and solid components configured to reduce compression of the apparatus relative to that which would be the case due to compression of the apparatus without the solid components.

24. The device of claim 19 , wherein:
the apparatus is a mixture of silicone and glass beads configured to reduce compression of the mixture relative to that which would be the case due to compression of the silicone alone.

25. The device of claim 19 , wherein:
the apparatus is configured to have a compressive resistance such that output of the bone conduction device at a first fundamental frequency is effectively the same or is the same as that which would be the case in the absence of the apparatus.

26. The device of claim 19 , wherein:
the device is configured such that a seismic mass of the actuator-seismic mass assembly is moved in an up direction and a down direction during operation of the device to evoke bone conduction hearing percepts; and
the apparatus provides a counterforce to the actuator-seismic mass assembly, thereby reducing motion of the seismic mass in at least one of the up direction or the down direction.

27. The device of claim 19 , wherein:
the device is configured such that the apparatus provides a counterforce to the actuator-seismic mass assembly, thereby reducing motion associated with a first movement that corresponds to a first fundamental frequency of an output of the device.

28. The device of claim 19 , wherein:
the static component is a housing wall of the device; and
the apparatus is located in a gap between the assembly and the housing wall of the device.

Assignees

• Cochlear Ltd

Inventors

• Miller Scott
• Andrews Travis Rian
• Mccullough Robert F
• Moumane Farid

Classifications

• H04R2225/31

  Aspects of the use of accumulators in hearing aids, e.g. rechargeable batteries or fuel cells · CPC title

• H04R25/554

  using a wireless connection, e.g. between microphone and amplifier or using Tcoils · CPC title

• H04R17/00

  Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00}) · CPC title

• H04R25/606 Primary

  acting directly on the eardrum, the ossicles or the skull, e.g. mastoid, tooth, maxillary or mandibular bone, or mechanically stimulating the cochlea, e.g. at the oval window · CPC title

• H04R2460/13

  Hearing devices using bone conduction transducers · CPC title