Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
  • H04R11/00—Transducers of moving-armature or moving-core type
  • H04R11/02—Loudspeakers
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
  • H04R11/00—Transducers of moving-armature or moving-core type
  • H04R11/06—Telephone receivers
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
  • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
  • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
  • H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers

Definitions

• This application relates to the construction of acoustic assemblies and, more specifically to the components of assemblies that are used to form a magnetic path in these assemblies.
• Various types of microphones and receivers have been used through the years. In these devices, different electrical components are housed together within a housing or assembly. Other types of acoustic devices may include other types of components. These devices may be used in hearing instruments such as hearing aids or in other electronic devices such as cellular phones and computers.
• the receiver motor typically includes a coil, a yoke, an armature (or reed), and magnets.
• the yoke may also serve to hold or support the magnets or other components.
• FIG. 1 comprises a cross-sectional view of a transducer with a step-shaped housing according to various embodiments of the present invention
• FIG. 2 comprises a perspective exploded view of the transducer of FIG. 1 showing with an L-shaped armature according to various embodiments of the present invention
• FIG. 3 comprises a side view of the transducer of FIG.1 and FIG. 2 showing a viewing window according to various embodiments of the present invention
• FIG. 4 comprises a perspective view of the transducer of FIGs. 1-3 with the armature connected to the outside of the transducer housing according to various embodiments of the present invention
• FIG. 5 comprises a perspective view of an alternative transducer with the armature connected to the inside of the transducer housing according to various embodiments of the present invention.
• the size of a receiver can be significantly reduced by combining the functions of a magnetic yoke and the receiver housing into one part or element. More specifically, the housing of the receiver is formed with a stepped portion that allows freedom in positioning the magnets of the receiver. Additionally and advantageously, using a non-flat base for the receiver housing eliminates the need for a piece part that could be required to raise the magnets away from the floor of the housing, does not require the use of large magnets, and allows for the use of adequately-sized (i.e., larger) coils. Consequently, the size of the receiver can be significantly decreased.
• a balanced armature receiver that includes a magnet, a coil, and a housing.
• the housing has a bottom surface including a first bottom portion with a first diameter/width (or dimension) and a second bottom portion with a second diameter/width (or dimension).
• the first diameter is greater than the second diameter and a stepped portion provides a transitional region between the two bottom portions.
• the base of the second bottom portion is coupled to the magnet and the base of the first bottom portion is coupled to the coil (to provide a magnetic mounting surface).
• the base of the second bottom portion is adjacent to the base of the first bottom portion and this positioning allows the coil to extend through a plane formed where the magnet and the base of the second bottom portion meet.
• the stepped design of the housing allows the magnets to be positioned properly to form a magnetic circuit and this is accomplished without the use of any additional part (e.g., a yoke) that would raise or hold the magnets. The deployment of large magnets is also avoided.
• FIGs. 1-4 one example of a transducer 100 with a stepped- shape housing is described.
• the transducer 100 includes a housing 102.
• the base 125 of the housing 102 is not flat, and includes a stepped portion 120 that transitions between a first portion 130 (with a diameter or dimension Dl) and a second portion 132 (with a diameter or dimension D2).
• Dl is larger than D2.
• Dl is 2.7 mm and D2 is 1.7 mm. Other examples of dimensions are possible.
• An armature or reed 106 (including an elongated or long section 124 and a shorter portion or section 126) extends through an opening or tunnel 103 in a coil 104 and is disposed between magnets 118.
• a rod 110 is attached to the armature 106 and to a diaphragm 112.
• Excitement of the coil 104 by an electrical signal received at a terminal 108 creates a magnetic flux that when combined with the flux from the magnets (path 116) moves the armature 106. Movement of the armature 106 causes the rod 1 10 to move and this in turn moves the diaphragm 112. Movement of the diaphragm 112 causes sound to be created and this exits the device 100 through an opening 114.
• no cover is shown as this unit may be paired with a second device of the same construction.
• a support member 128 (e.g., made of a soft magnetic material) determines a position of the magnets 118 and provides the pathl 16.
• the portion 126 of the armature 106 is coupled to the exterior of the housing 125 and extends through an opening 135 in the housing.
• a window 122 allows a user to observe the positioning of the armature 106 relative to the magnets 118 to ensure the positioning of these elements is correct.
• a base 123 of the second portion 132 of the housing base 125 is coupled to the magnet 118.
• the base 123 of the second portion 132 is adjacent to a base (coil mounting surface) 127 of the bottom portion 130 of the housing base 125 and this positioning allows the coil 104 to extend through a plane formed where the magnet 1 18 and the base 123 of the second portion 132 meet.
• the narrowed dimensions of the housing 102 allow the magnets 118 to be positioned properly to form an optimum magnetic circuit and this is accomplished without the use of any additional part (e.g., a yoke) that would raise or hold the magnets 118. The deployment of large magnets is also avoided.
• a stepped-shaped portion 120 has a specific configuration and relative dimensions that have been described herein, other configurations, shapes, and relative dimensions are possible.
• the stepped portion 120 is smooth in its transition between adjacent portions, a more jagged transitional region (with several intermediate steps) may also be used. Other examples are possible.
• FIG. 5 an alternative example of a transducer is described.
• the transducer of FIG. 5 is the same as that of FIGs. 1-4 except that the portion 126 of the armature 106 is coupled to the interior of the housing 102 rather than extending through an opening in the housing 102 and being coupled to the exterior of the housing 102.
• the operation of the transducer 100 is the same as that described with respect to the operation of the transducer of FIGs. 1-4.

Landscapes

• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Engineering & Computer Science (AREA)
• Acoustics & Sound (AREA)
• Signal Processing (AREA)
• Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
• Reciprocating, Oscillating Or Vibrating Motors (AREA)
• Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49161687

Family Applications (1)

Country Status (4)

Cited By (1)

Citations (5)

Family Cites Families (3)

• 2013
  • 2013-03-11 CN CN201380020019.6A patent/CN104247458A/zh active Pending
  • 2013-03-11 WO PCT/US2013/030184 patent/WO2013138234A1/en active Application Filing
• 2014
  • 2014-09-15 PH PH12014502043A patent/PH12014502043A1/en unknown
  • 2014-09-19 DK DKPA201470579A patent/DK201470579A/da not_active Application Discontinuation

Patent Citations (5)

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