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US 11,601,770 B2Granted
Micro transducer molding
AssigneeBose Corporation
InventorsMarek Kawka, Alexander Irwin, Martha Carman, Timothy M. Parker
Life of this patent
Estimating the term…
Abstract
Articles and methods are provided for miniature acoustic transducers having highly compliant suspension systems despite their small size. In various examples the suspension system is molded of a liquid silicone rubber (LSR) and is molded in an interior cavity geometry that includes at least one of a radial offset or an axial offset from a desired geometry of the suspension.
Claims20
A method of forming an acoustic transducer, the method comprising:
- providing a mold having an interior cavity geometry configured to form a non-planar suspension with an apex, a position of the apex in the mold having at least one of a radial offset or an axial offset from a desired cured position of the apex of the suspension;
- and
- injecting a compliant material into the mold.
An acoustic transducer comprising:
- a frame having a largest linear dimension of 8.0 millimeters or less;
- a non-planar suspension formed of a compliant material coupled to the frame and having an apex;
- and
- a piston coupled to and suspended by the suspension, such that the piston is suspended within the frame and the piston when in an at-rest position reacts to an applied force with a stiffness in a range of 5 to 50 Newtons per meter (N/m).
1 more element
A mold comprising:
- an interior cavity having an interior geometry configured to form a non-planar suspension including an apex, a position of the apex in the mold having at least one of a radial offset or an axial offset from a desired cured position of the apex geometry of a transducer suspension;
- and
- an inlet to allow a compliant material to be injected in the interior cavity.
Dependencies are inferred from the claim text.