Earphone driver and method of manufacture
First Claim
1. A balanced armature motor assembly comprising:
- an armature having a flexible reed;
a pole piece containing a pair of magnets;
a bobbin comprising a first cutout, a second cutout, and a center post;
a wire coil surrounding the bobbin having a first end and a second end;
a circuit board mounted to the bobbin, the circuit board comprising a first terminal and a second terminal; and
a drive pin operatively connected between the reed and a paddle;
wherein the first end of the wire coil is secured to the first terminal of the circuit board and passes through the first cutout of the bobbin and the second end of the wire coil is secured to the second terminal of the circuit board and passes through the second cutout of the bobbin.
1 Assignment
0 Petitions
Accused Products
Abstract
A balanced armature motor assembly has a circuit board mounted to a bobbin. A first end of a wire coil is secured to a first terminal on the circuit board and passes through a first cutout of the bobbin. A second end of the wire coil is secured to a second terminal on the circuit board and passes through a second cutout of the bobbin. The first end of the wire coil is oriented along a first line tangent to a center post of the bobbin, and the second end of the wire coil is oriented along a second line tangent to the center post of the bobbin. In another embodiment, a compressed polymer material is interposed between a first magnet and a post located on the bobbin and between a second magnet and the post on the bobbin. The polymer material forces the first and second magnets into contact with the pole piece such that the magnets can be welded to the pole piece.
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Citations
20 Claims
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1. A balanced armature motor assembly comprising:
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an armature having a flexible reed; a pole piece containing a pair of magnets; a bobbin comprising a first cutout, a second cutout, and a center post; a wire coil surrounding the bobbin having a first end and a second end; a circuit board mounted to the bobbin, the circuit board comprising a first terminal and a second terminal; and a drive pin operatively connected between the reed and a paddle;
wherein the first end of the wire coil is secured to the first terminal of the circuit board and passes through the first cutout of the bobbin and the second end of the wire coil is secured to the second terminal of the circuit board and passes through the second cutout of the bobbin. - View Dependent Claims (2, 3, 4, 8)
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5. A method of forming a balanced armature motor assembly comprising an armature having a flexible reed, a pole piece containing a pair of magnets, a bobbin, a wire coil, a drive pin, a paddle, and a circuit board having first and second terminals thereon, the method comprising:
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wrapping a first end of a wire around a center post located on the bobbin; placing a portion of the first end of the wire in a first cutout located on the bobbin; wrapping a central portion of the bobbin with the wire to form the wire coil; locating a portion of a second end of the wire in a second cutout located on the bobbin;
wrapping the second end of the wire around the center post; andaffixing the first end of the wire to the first terminal and the second end of the wire to the second terminal. - View Dependent Claims (6, 7)
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9. A balanced armature motor assembly comprising:
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an armature having a flexible reed; a pole piece housing a first magnet and a second magnet; a bobbin having at least one post extending therefrom; a wire coil surrounding the bobbin; a circuit board mounted to the bobbin; a drive pin operatively connected to the reed and to a paddle; and a compressed polymer material interposed between the first magnet and the post and between the second magnet and the post, the polymer material forcing the first and second magnets into contact with the pole piece. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method of forming a balanced armature motor assembly comprising an armature having a flexible reed, a pole piece containing a first magnet and a second magnet, a bobbin, a wire coil, a drive pin, a paddle, and a circuit board, the method comprising:
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placing a polymer material on the first magnet and the second magnet; positioning the first magnet and the second magnet such that the polymer material contacts at least one post extending from the bobbin; placing the pole piece over the first magnet and the second magnet and compressing the polymer material to cause the polymer material to force the first magnet and the second magnet into contact with the pole piece; and securing the first magnet and the second magnet to the pole piece. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification