Performance enhancing apparatus of balanced armature transducer

Patent metadata

Field	Value
Publication number	US-9420379-B2
Application number	US-201414251980-A
Country	US
Kind code	B2
Filing date	Apr 14, 2014
Priority date	Jul 2, 2013
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

A balanced armature transducer is provided. The balanced armature transducer is formed with components housed within a frame and includes a pair of magnets separated by a gap to form a Direct Current (DC) magnetic field, and an armature having one end positioned between the separated magnets and having another end curved upward and fixed to an upper portion of the frame.

First claim

What is claimed is:

1. A balanced armature transducer formed with components housed within a frame, the balanced armature transducer comprising:
a diaphragm configured to radiate sound;
a pair of magnets separated by a gap to form a Direct Current (DC) magnetic field; and
an armature having one end positioned between the separated magnets and having another end curved upward and fixed to an inner surface of an upper portion of the frame,
wherein the diaphragm is disposed above the upper portion of the frame which fixes the armature.

2. The balanced armature transducer of claim 1 , further comprising:
a coil wound around a portion of the armature, the coil configured to create an Alternating Current (AC) magnetic field between the armature and the magnets by generating a magnetic flux to the armature when a signal current is applied;
and
a connecting rod connected between the armature and the diaphragm,
wherein the diaphragm is further configured to vibrate in correlation with displacement of the connecting rod, the connecting rod being displaced as the armature is deformed when the AC magnetic field is overlapped with the DC magnetic field.

3. The balanced armature transducer of claim 1 , wherein the other end of the armature that is fixed to the upper portion of the frame has a sectional shape of at least one of an U shape declined to the side, a ‘ ’ shape, and a hook shape.

4. The balanced armature transducer of claim 1 , wherein the armature is formed in an uneven structure in which a surface having an influence on a magnetic force by the magnet has a surface area greater than a plane.

5. The balanced armature transducer of claim 4 , wherein the uneven structure of the armature is at least one of a sine wave, a quadrangle, a polygon, and a hemisphere shape.

6. The balanced armature transducer of claim 1 , wherein a width of the armature is adjusted according to a desired sound pressure sensitivity.

7. The balanced armature transducer of claim 2 , further comprising at least one radiating port that externally radiates sound generated by the diaphragm.

8. The balanced armature transducer of claim 7 , wherein the radiating port externally protrudes from one side surface of a circumference of the frame to radiate sound in a direction different from a direction in which the diaphragm vibrates.

9. The balanced armature transducer of claim 7 , wherein the radiating port radiates sound in a direction in which the diaphragm vibrates, as an upper side surface of the frame has a shape open to the outside.

10. The balanced armature transducer of claim 7 , wherein the radiating port radiates sound in a direction in which the diaphragm vibrates and a direction different from the direction to one side of a circumference of the frame and an upper side surface of the frame.

11. A balanced armature transducer formed with components housed within a frame, the balanced armature transducer comprising:
a pair of magnets separated by a gap to form a Direct Current (DC) magnetic field;
an armature having one end positioned between the separated magnets and having another end curved upward and fixed to an inner surface of an upper portion of the frame and in which at least one surface of the one end of the armature positioned between the magnets is formed having an uneven structure;
a coil wound around a portion of the armature, the coil configured to create an Alternating Current (AC) magnetic field between the armature and the magnets by generating a magnetic flux to the armature when a signal current is applied;
a diaphragm configured to radiate sound; and
a connecting rod connected between the armature and the diaphragm,
wherein the diaphragm is further configured to vibrate in correlation with displacement of the connecting rod, the connecting rod being displaced as the armature is deformed when the AC magnetic field is overlapped with the DC magnetic field, and
wherein the diaphragm disposed above the upper portion of the frame which fixes the armature.

12. A balanced armature transducer comprising:
a frame;
a diaphragm configured to radiate sound;
a pair of magnets separated by a gap to form a Direct Current (DC) magnetic field; and
an armature having a first end positioned between the separated magnets, the first end including a first surface and a second surface opposite the first surface, each of the first surface and the second surface having a length dimension and a varying width dimension,
wherein at least one of the first surface and the second surface has an increased surface area as compared with a plane surface of the same dimensions, and
wherein the diaphragm is disposed above an upper portion of the frame which fixes the armature.

13. The balanced armature transducer of claim 12 , further comprising:
a coil wound around a portion of the armature, the coil configured to create an Alternating Current (AC) magnetic field between the armature and the magnets by generating a magnetic flux to the armature when a signal current is applied;
a diaphragm configured to radiate sound; and
a connecting rod connected between the armature and the diaphragm,
wherein the diaphragm is further configured to vibrate in correlation with displacement of the connecting rod, the connecting rod being displaced as the armature is deformed when the AC magnetic field is overlapped with the DC magnetic field, and
wherein the diaphragm is disposed above an upper portion of the frame which fixes the armature.

14. The balanced armature transducer of claim 12 , wherein a second end of the armature is fixed to a portion of the frame and has a sectional shape of at least one of an U shape declined to the side, a ‘ ’ shape, and a hook shape.

15. The balanced armature transducer of claim 12 , wherein the at least one of the first surface and the second surface of the first end of the armature has a shape of at least one of a sine wave, a quadrangle, a polygon, and a hemisphere.

16. The balanced armature transducer of claim 12 , wherein at least one of the width of the first surface of the first end of the armature and the width of the second surface of the first end of the armature is adjusted according to a desired sound pressure sensitivity.

17. The balanced armature transducer of claim 13 , further comprising at least one radiating port that externally radiates sound generated by the diaphragm.

18. The balanced armature transducer of claim 17 , wherein the radiating port externally protrudes from one side surface of a circumference of the frame to radiate sound in a direction different from a direction in which the diaphragm vibrates.

19. The balanced armature transducer of claim 17 , wherein the radiating port radiates sound in a direction in which the diaphragm vibrates, as an upper side surface of the frame has a shape open to the outside.

20. The balanced armature transducer of claim 17 , wherein the radiating port radiates sound in a direction in which the diaphragm vibrates and a direction different from the direction to one side of a circumference of the frame and an upper side surface of the frame.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Taeeon
• Park Youngbae
• Lee Byounghee

Classifications

• H04R11/02 Primary

  Loudspeakers · CPC title

• H04R1/10

  Earpieces; Attachments therefor {; Earphones; Monophonic headphones (H04R1/28 takes precedence; stereophonic headphones H04R5/033)} · CPC title

• H04R25/00

  Electric hearing aids · CPC title