CN104247458A

CN104247458A - A receiver with a non-uniform shaped housing

Info

Publication number: CN104247458A
Application number: CN201380020019.6A
Authority: CN
Inventors: T·米勒
Original assignee: Knowles Electronics LLC
Current assignee: Knowles Electronics LLC
Priority date: 2012-03-16
Filing date: 2013-03-11
Publication date: 2014-12-24
Also published as: DK201470579A; PH12014502043A1; WO2013138234A1

Abstract

A balanced armature receiver includes a magnet, a coil, and a housing. The magnet and the coil are disposed within the housing and the housing comprising a bottom surface. The bottom surface includes a first bottom portion with a first dimension and a second bottom portion with a second dimension. The bottom surface further includes a stepped portion that is integrally formed with and connects the first bottom portion and the second bottom portion. The first dimension is greater than the second dimension. A second base of the second bottom portion is coupled to the magnet. The second base is adjacent to a first base formed in the first bottom portion allowing the coil to extend through a plane where the magnet and the second base meet.

Description

There is the receiver of the shell of non-homogeneous shaping

Technical field

The application relates to the structure of acoustic assembly, more specifically, relates to the parts being used to form the magnetic circuit (magnetic path) in these assemblies in assembly.

Background technology

Various types of microphone and receiver are employed these years.In such devices, different electric parts are contained in shell or assembly together.The acoustic equipment of other types can comprise the parts of other types.These equipment can be used in the such hearing instrument of such as hearing aids or such other electronic equipments of such as cell phone and computer.

Receiver motor generally includes coil, yoke, armature (or reed) and magnet.The signal of telecommunication being applied to coil produces magnetic field in motor, which results in armature and moves.The movement of armature causes barrier film (diaphragm) mobile, this generates sound.Magnet, armature and yoke together form magnetic circuit (magnetic circuit).Yoke can also be used to keep or support magnet or miscellaneous part.

In market now, usually expect less and lighter equipment.Such as, in the such many application of such as hearing aids, usually less receiver is expected.Unfortunately, above-mentioned parts are used to be difficult to the size of receiver to be decreased to exceed certain limit.

Make trial to eliminating such as yoke and its function being combined with shell.The problem done like this is: the position of magnet independently cannot be determined with the size of shell.This shortcoming forces designer to use very little coil or very large magnet usually, and both all can not cause best performance.

Another solution of previously attempting for the problems referred to above places metallic gasket below magnet, uses the material with soft magnetic characteristic for this pad.But the solution of this trial introduces the chance changing magnet positions, in order to good acoustical behavior, strictly must control it.This previous method also introduces additional step and additional part in a manufacturing process, thus adds the cost producing transducer.

Accompanying drawing explanation

In order to the comprehend disclosure, should with reference to the following detailed description and accompanying drawing, wherein:

Fig. 1 comprises the cutaway view with the transducer of step-like shell according to each execution mode of the present invention;

Fig. 2 comprise according to each execution mode of the present invention, showing in Fig. 1 have the three-dimensional exploded view of the transducer of L shape armature;

Fig. 3 comprise according to each execution mode of the present invention, the end view showing the transducer of viewing window in Fig. 1 and Fig. 2;

Fig. 4 comprise according to each execution mode of the present invention, having in Fig. 1 to Fig. 3 be connected to the stereogram of the transducer of the armature of the outside of transducer enclosure;

Fig. 5 comprise according to each execution mode of the present invention, the stereogram of the alternative transducer of the armature with the inside being connected to transducer enclosure.

Technical staff will be appreciated that the parts in accompanying drawing be in order to simple and clear for the purpose of and illustrative.Will understand further, some action and/or step can describe according to the particular order occurred or describe, and it will be appreciated by those skilled in the art that, the such particularity for order is in fact optional.Be to be further appreciated that, unless set forth specific meanings in addition in this article, otherwise term used herein and expressing have with for their corresponding respective investigation and research field these terms with express the usual implication conformed to.

Embodiment

In the method described in this article, the size of receiver can by being attached to a part or element and reducing significantly by the function of yoke and receiver casing.More specifically, the shell of receiver is formed with step part, and this step part allows the magnet of free location receivers.In addition and advantageously, the non-flat forms base of receiver casing is used to eliminate the needs of the part for the bottom surface (floor) that may need for magnet being lifted away from shell, do not need to use large magnet, and allow (that is, the larger) coil using appropriate size.Therefore, the size of receiver can be significantly reduced.

In many execution modes in these embodiments, balanced armature receiver is configured to comprise magnet, coil and shell.This shell has bottom surface, this bottom surface comprise have the first diameter/width (or size) first bottom and have Second bobbin diameter/width (or size) second bottom.This first diameter is greater than this Second bobbin diameter, and step part provides the transitional region between these two bottoms.

Base bottom second is coupled to magnet, and the base bottom first is coupled to coil (to provide magnetic mounting surface).Base bottom base bottom second and first is adjacent, and this location allow coil extend through magnet with second bottom the plane that formed of the crossing place of base.The step design of shell allows magnet suitably to locate to form magnetic circuit, and this realizes when not needing to use any optional feature (such as, the yoke) lifting or keep magnet.Also avoid the deployment of large magnet.

Referring now to Fig. 1 to Fig. 4, an example with the transducer 100 of step-like shell is described.Transducer 100 comprises shell 102.The base 125 of shell 102 is uneven, and is included in the step part 120 of transition between Part I 130 (having diameter or dimension D 1) and Part II 132 (having diameter or dimension D 2).D1 is greater than D2.In one example, D1 is 2.7mm, and D2 is 1.7mm.Other examples of size are also possible.

Armature or reed 106 (comprising elongated or long section 124 and shorter part or section 126) extend through perforate in coil 104 or path 10 3, and are arranged between magnet 118.Bar 110 is attached to armature 106 and barrier film 112.Coil 104 produces magnetic flux by the excitation of the signal of telecommunication received at terminal 108 place, and this magnetic flux is at the time shift moving armature 106 that combines with the magnetic flux from magnet (path 116).The movement of armature 106 causes bar 110 to move, and this and then moving regulator 112.The movement of barrier film 112 causes the generation of sound, and this sound is sent from equipment 100 by perforate 114.In these figures, lid is not shown, this is because this unit can with second device pairing with same structure.Support component 128 (such as, being made up of soft magnetic material) determines the position of magnet 118, and provides path 116.

The part 126 of armature 106 is coupled to the outside of shell 125, and extends through the perforate 135 in shell.Window 122 allows user to observe the location of armature 106 relative to magnet 118, correct to guarantee the location of these parts.

The base 123 of the Part II 132 of outer casing base 125 is coupled to magnet 118.The base 123 of Part II 132 is adjacent with base (the coil mounting surface) 127 of the bottom 130 of outer casing base 125, and this location allows coil 104 to extend through the plane formed in the place that magnet 118 is crossing with the base 123 of Part II 132.The size narrowed of shell 102 allows magnet 118, and suitably location is to form best magnetic circuit, and this realizes not using in any optional feature (such as, the yoke) situation lifting or keep magnet 118.Also avoid the deployment of large magnet.

Will understand, although step part 120 has the ad hoc structure and relative size that have described in this article, other structure, shape and relative size are also possible.Such as, although the transition of step part 120 between its adjacent part is level and smooth, more uneven transitional region (there is multiple intermediate step) also can be used.Other examples are also possible.

Referring now to Fig. 5, describe the example of the alternative of transducer.Except following aspect, the transducer in Fig. 5 is identical with the transducer in Fig. 1 to Fig. 4: the part 126 of armature 106 is coupled to the inside of shell 102, instead of the perforate extended through in shell 102 and be coupled to the outside of shell 102.The operation of transducer 100 is identical with operation the operation described of the transducer for Fig. 1 to Fig. 4.

Be described herein preferred embodiment of the present invention, comprise that the present inventor knows for realizing best mode of the present invention.It should be appreciated that illustrated execution mode is only exemplary, and should not be regarded as limiting the scope of the invention.

Claims

1. a balanced armature receiver, this receiver comprises:

Magnet;

Coil;

Shell, described magnet and described coil are arranged in described shell, and described shell comprises bottom surface, and

-wherein, described bottom surface comprise have first size first bottom and have the second size second bottom, described bottom surface comprises step part further, this step part forms with bottom described first and bottom described second and bottom being connected described first and bottom described second, described first size is greater than described second size;

-wherein, the second base bottom described second is coupled to described magnet;

-make described second base with bottom described first in the first base of being formed adjacent, extend through the described magnet plane crossing with described second base to allow described coil.

2. balanced armature receiver according to claim 1, wherein, described second base directly supports described magnet.

3. balanced armature receiver according to claim 1, described balanced armature receiver comprises passage further, and this passage extends through described coil and described magnet, and wherein, armature extends through described passage.

4. balanced armature receiver according to claim 3, wherein, described armature extends through the perforate in described shell.

5. balanced armature receiver according to claim 3, wherein, described armature is coupled to the inside of described shell.

6. balanced armature receiver according to claim 3, described balanced armature receiver comprises bar further, and this bar is coupled to described armature.

7. balanced armature receiver according to claim 6, described balanced armature receiver comprises barrier film further, and this barrier film is coupled to described bar.

8. balanced armature receiver according to claim 1, described balanced armature receiver comprises window further, and this window is formed through described shell and is configured to allow user to watch the position of described armature.