PATENT DOCUMENT

Publication Number: US-12096196-B2
Application Number: US-202318488802-A
Country: US
Kind Code: B2

Title: Moving-magnet motor

Abstract:
A moving magnet motor comprising: a stationary voice coil coupled to a frame; a moving magnet assembly movably coupled to the frame and operable to move relative to the stationary coil, the moving magnet assembly comprising a magnet and a flux concentrating member that define a gap within which the stationary coil is positioned; and an actuating surface coupled to the moving magnet assembly, and wherein a movement of the moving magnet assembly drives a movement of the actuating surface along an axis of translation.

Claims:
What is claimed is: 
     
       1. A moving magnet motor comprising:
 a frame; 
 a coil coupled to the frame and having a first end and a second end defining a winding height of the coil; 
 a magnet assembly operable to move relative to the coil and the frame, the magnet assembly comprising a magnet and a flux concentrating member that define a gap within which the coil is positioned and a dominant flux density region along an entire winding height of the coil; and 
 an actuating surface coupled to the magnet assembly, and wherein a movement of the magnet assembly drives a movement of the actuating surface. 
 
     
     
       2. The moving magnet motor of  claim 1  wherein the coil is a continuous voice coil. 
     
     
       3. The moving magnet motor of  claim 1  wherein the coil is an annularly shaped voice coil and the magnet is radially inward of the annularly shaped voice coil and the flux concentrating member is radially outward of the annularly shaped voice coil. 
     
     
       4. The moving magnet motor of  claim 1  wherein the coil is an annularly shaped voice coil and the flux concentrating member is radially inward of the annularly shaped voice coil and the magnet is radially outward of the annularly shaped voice coil. 
     
     
       5. The moving magnet motor of  claim 1  wherein the magnet is a radially polarized magnet. 
     
     
       6. The moving magnet motor of  claim 1  wherein the flux concentrating member is a steel structure. 
     
     
       7. The moving magnet motor of  claim 1  wherein the flux concentrating member is a radially polarized magnet. 
     
     
       8. The moving magnet motor of  claim 1  wherein the flux concentrating member is a first flux concentrating member and the magnet assembly further comprises a second flux concentrating member that is directly coupled to the magnet. 
     
     
       9. The moving magnet motor of  claim 1  wherein the coil is a first voice coil, the assembly moving magnet motor further comprises a second voice coil positioned radially outward of the first voice coil. 
     
     
       10. The moving magnet motor of  claim 9  wherein the first voice coil and the second voice coil have a same direction of current and a same orientation. 
     
     
       11. The moving magnet motor of  claim 9  wherein the flux concentrating member is positioned between the first voice coil and the second voice coil, and the magnet is a first radially polarized magnet, the magnet assembly further comprises a second radially polarized magnet, and wherein the first radially polarized magnet is positioned radially inward of the first voice coil and the second radially polarized magnet is positioned radially outward of the second voice coil. 
     
     
       12. The moving magnet motor of  claim 9  wherein the magnet is positioned between the first voice coil and the second voice coil, the flux concentrating member is a first flux concentrating member, the magnet assembly further comprises a second flux concentrating member, and wherein the first flux concentrating member is positioned radially inward of the first voice coil and the second flux concentrating member is positioned radially outward of the second voice coil. 
     
     
       13. The moving magnet motor of  claim 1  wherein the frame comprises an electronic device housing. 
     
     
       14. A loudspeaker moving magnet motor assembly comprising:
 a continuous voice coil coupled to a frame; 
 a diaphragm positioned over the continuous voice coil and coupled to the frame; and 
 a magnet assembly coupled to the diaphragm, the magnet assembly having a first magnet member and a second magnet member that define a gap within which the continuous voice coil is positioned, and the first magnet member and the second magnet member are operable to focus a magnetic flux density toward the continuous voice coil and translate along the continuous voice coil to drive a movement of the diaphragm along an axis of translation. 
 
     
     
       15. The loudspeaker moving magnet motor assembly of  claim 14  the magnet assembly has a displacement range along the axis of translation that is defined by a height of the continuous voice coil. 
     
     
       16. The loudspeaker moving magnet motor assembly of  claim 14  wherein the first magnet member is a radially polarized magnet and the second magnet member is a steel member that are positioned on opposite sides of the continuous voice coil. 
     
     
       17. The loudspeaker moving magnet motor assembly of  claim 14  further comprising a third magnet member. 
     
     
       18. The loudspeaker moving magnet motor assembly of  claim 17  wherein the continuous voice coil is a first continuous voice coil, and the assembly further comprises a second continuous voice coil. 
     
     
       19. The loudspeaker moving magnet motor assembly of  claim 18  wherein the second magnet member is a steel structure positioned between the first continuous voice coil and the second continuous voice coil, and wherein the first magnet member and the third magnet member are positioned along sides of the first continuous voice coil and the second continuous voice coil opposite the second magnet member. 
     
     
       20. The loudspeaker moving magnet motor assembly of  claim 18  wherein the first magnet member, the second magnet member and the third magnet member are positioned along different sides of the first continuous voice coil and the second continuous voice coil, and at least one of the first magnet member, the second magnet member and the third magnet member comprises a radially polarized magnet.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation of co-pending U.S. patent application Ser. No. 17/688,536, filed Mar. 7, 2023, which claims the benefit of priority of U.S. Provisional Patent Application No. 63/174,942, filed Apr. 14, 2021 and incorporated herein by reference. 
    
    
     FIELD 
     An aspect of the disclosure is directed to a moving-magnet motor including a moving-magnet motor having a magnet assembly that moves relative to a coil to focus the magnetic field over the coil and reduce a reverse magnetic field effect. Other aspects are also described and claimed. 
     BACKGROUND 
     In modern consumer electronics, audio capability is playing an increasingly larger role as improvements in digital audio signal processing and audio content delivery continue to happen. In this aspect, there is a wide range of consumer electronics devices that can benefit from improved audio performance. For instance, portable devices that use electro-dynamic transducers having moving motor systems can benefit from improved performance. For example, while moving motor systems may have the advantage of using a larger coil than non-moving motor systems, they may be less efficient because they use an open magnetic circuit around the magnet without a region of focused magnetic field. This in turn, results in a reverse magnetic flux passing through the same coil that is developing the Lorentz force to excite the diaphragm. At large excursions, there becomes no dominant flux density over the coils, which introduces distortion as the positive and negative Lorentz forces almost cancel each other out. 
     SUMMARY 
     An aspect of the disclosure is directed to an improvement over moving magnet motors, for example loudspeaker motors. Typically, moving magnet speakers are designed using the stray magnetic flux density of magnets to move the motor, which are not a part of a closed magnet circuit. When magnets are used outside magnetic circuits, their ability of focusing their magnetic flux density is very poor. The working point of a magnet in free space is very low, therefore the magnet is also not protected from demagnetization under elevated temperatures. Therefore, when loudspeakers are built with moving magnets that do not use any guiding elements for their magnetic flux, the reverse magnetic flux also passes through the same coil that is developing the Lorentz force to excite the diaphragm. At large excursions, there becomes no dominant flux density over the coils, which introduces distortion as the positive and negative Lorenz forces almost cancel out each other. 
     The instant disclosure therefore provides a moving magnet motor having a closed magnet circuit configured to focus a magnetic flux density on the coil and travel over the coil driving the movement of the actuating surface (e.g., a speaker diaphragm). This configuration results in a reverse magnetic field that becomes very small as compared to the dominant flux density on the coil such that large excursion and low distortion values can be achieved. To accomplish this, one or more radially polarized magnet(s) are positioned close to the voice coil(s) (e.g., inner and outer coils having the same winding height), and the magnetic flux lines of the magnet are concentrated with one or more flux concentrating member(s) made of soft magnetic material(s) (e.g., a steel material) positioned along the other side of the voice coil(s). The polarized magnet(s) and the soft magnetic material(s) are part of the same moving mass therefore the soft magnetic material follows the motion of the magnet. This moving mass is, in turn, connected to the actuating surface (e.g., speaker diaphragm) such that its movement drives the movement (e.g., vibration) of the actuating surface. Since the highest concentration of flux density occurs between the soft magnetic material(s) and the magnet(s), the dominant magnetic flux density moves with the moving assembly, without much degradation depending on the position of the diaphragm. This dominant flux density region, moving over the voice coil(s), enables larger excursion of the actuating surface (e.g., diaphragm), without observing reverse magnetic field disturbance. This is because the reverse magnetic field magnitude becomes extremely small when compared to the dominant magnetic flux density between the hard and soft magnetic parts. Accordingly, a moving magnet motor system for driving an actuating surface with large excursion and low distortion values can be achieved. 
     Representatively, in one aspect, a moving magnet motor including a stationary voice coil coupled to a frame; a moving magnet assembly movably coupled to the frame and operable to move relative to the stationary coil, the moving magnet assembly comprising a magnet and a flux concentrating member that define a gap within which the stationary coil is positioned; and an actuating surface coupled to the moving magnet assembly, and wherein a movement of the moving magnet assembly drives a movement of the actuating surface along an axis of translation is provided. The stationary coil may be a continuous voice coil. The stationary coil may be an annularly shaped voice coil and the magnet is radially inward of the voice coil and the flux concentrating member is radially outward of the voice coil. In other aspects, the flux concentrating member may be radially inward of the voice coil and the magnet is radially outward of the voice coil. The magnet may be a radially polarized magnet. The flux concentrating member may be a steel structure. In other aspects, the flux concentrating member may be a radially polarized magnet. In some aspects, the flux concentrating member is a first flux concentrating member and the moving magnet assembly further comprises a second flux concentrating member that is directly coupled to the magnet. In still further aspects, the stationary coil is a first stationary voice coil, and the assembly further includes a second stationary voice coil positioned radially outward of the first stationary voice coil. In some aspects, the first stationary voice coil and the second stationary voice coil have a same direction of current and a same orientation. In some aspects, the flux concentrating member is positioned between the first and second stationary voice coils, and the magnet is a first radially polarized magnet, the moving magnet assembly further comprises a second radially polarized magnet, and wherein the first radially polarized magnet is positioned radially inward of the first stationary voice coil and the second radially polarized magnet is positioned radially outward of the second stationary voice coil. In other aspects, the magnet is positioned between the first and second stationary voice coils, the flux concentrating member is a first flux concentrating member, the moving magnet assembly further comprises a second flux concentrating member, and wherein the first flux concentrating member is positioned radially inward of the first stationary voice coil and the second flux concentrating member is positioned radially outward of the second stationary voice coil. 
     In another aspects, a loudspeaker magnet motor assembly including a stationary portion comprising a continuous voice coil fixedly coupled to a frame; and a moving portion comprising a diaphragm and a magnet assembly movably coupled to the frame, the magnet assembly having a first magnet member and a second magnet member operable to focus a magnetic flux density toward the continuous voice coil and translate along the continuous voice coil to drive a movement of the diaphragm along an axis of translation is provided. The magnet assembly may have a displacement range along the axis of translation that is defined by a height of the continuous voice coil. In some aspects, the first magnet member is a radially polarized magnet and the second magnet member is a steel member that are positioned on opposite sides of the continuous voice coil. In some aspects, the first magnetic member and the second magnetic member define a gap within which the continuous voice coil is positioned. In some aspects, the moving portion further comprises a third magnet member directly attached to the first magnet member or the second magnet member. In still further aspects, the continuous voice coil is a first continuous voice coil, and the stationary portion further comprises a second continuous voice coil. In some aspects, the second magnet member may be a steel structure positioned between the first continuous voice coil and the second continuous voice coil, the moving portion further comprises a third magnet member, and wherein the first magnet member and the third magnet member are positioned along sides of the first continuous voice coil and the second continuous voice coil opposite the second magnet member. The moving portion may further include a third magnet member, and the first magnet member, the second magnet member and the third magnet member are radially polarized magnets positioned along different sides of the first continuous voice coil and the second continuous voice coil. In still further aspects, the first magnet member is a radially polarized magnet positioned between the first continuous voice coil and the second continuous voice coil, the moving portion further comprises a third magnet member, and wherein the second magnet member and the third magnet member are steel structures positioned along different sides of the first continuous voice coil and the second continuous voice coil. 
     In another aspect, an electronic device includes an electronic device housing, a moving magnet motor coupled to the electronic device housing and an actuating surface. The moving magnet motor may include a stationary voice coil and a moving magnet assembly operable to move relative to the stationary coil. The moving magnet assembly may include a magnet and a flux concentrating member that define a gap within which the stationary coil is positioned. In some aspects, the moving magnet motor is a loudspeaker moving magnet motor and the actuating surface is a loudspeaker diaphragm. In some aspects, the actuating surface is a housing wall of the electronic device housing. 
     In some aspects, the moving magnet motor of any of the previously discussed configurations may be a loudspeaker moving magnet motor or a shaker integrated within a portable electronic device. 
     The above summary does not include an exhaustive list of all aspects of the present disclosure. It is contemplated that the disclosure includes all systems and methods that can be practiced from all suitable combinations of the various aspects summarized above, as well as those disclosed in the Detailed Description below and particularly pointed out in the claims filed with the application. Such combinations have particular advantages not specifically recited in the above summary. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The aspects are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” aspect in this disclosure are not necessarily to the same aspect, and they mean at least one. 
         FIG.  1    illustrates a cross-sectional side view of one aspect of a moving magnet motor assembly. 
         FIG.  2    illustrates a schematic cross-sectional side view of another aspect of a moving magnet motor assembly. 
         FIG.  3    illustrates a schematic cross-sectional side view of another aspect of a moving magnet motor assembly. 
         FIG.  4    illustrates a schematic cross-sectional side view of another aspect of a moving magnet motor assembly. 
         FIG.  5    illustrates a schematic cross-sectional side view of another aspect of a moving magnet motor assembly. 
         FIG.  6    illustrates a schematic cross-sectional side view of another aspect of a moving magnet motor assembly. 
         FIG.  7    illustrates a schematic cross-sectional side view of another aspect of a moving magnet motor assembly. 
         FIG.  8    illustrates a schematic cross-sectional side view of another aspect of a moving magnet motor assembly. 
         FIG.  9    illustrates a schematic cross-sectional side view of another aspect of a moving magnet motor assembly. 
         FIG.  10    illustrates a schematic cross-sectional side view of another aspect of a moving magnet motor assembly. 
         FIG.  11    illustrates a schematic cross-sectional side view of another aspect of a moving magnet motor assembly. 
         FIG.  12    illustrates a simplified schematic view of an electronic device in which a transducer assembly may be implemented. 
         FIG.  13    illustrates a block diagram of some of the constituent components of an electronic device in which a transducer assembly may be implemented. 
     
    
    
     DETAILED DESCRIPTION 
     In this section we shall explain several preferred aspects of this disclosure with reference to the appended drawings. Whenever the shapes, relative positions and other aspects of the parts described in the aspects are not clearly defined, the scope of the disclosure is not limited only to the parts shown, which are meant merely for the purpose of illustration. Also, while numerous details are set forth, it is understood that some aspects of the disclosure may be practiced without these details. In other instances, well-known structures and techniques have not been shown in detail so as not to obscure the understanding of this description. 
     The terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. Spatially relative terms, such as “beneath”, “below”, “lower”, “above”, “upper”, and the like may be used herein for ease of description to describe one element&#39;s or feature&#39;s relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the exemplary term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. 
     As used herein, the singular forms “a”, “an”, and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising” specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. 
     The terms “or” and “and/or” as used herein are to be interpreted as inclusive or meaning any one or any combination. Therefore, “A, B or C” or “A, B and/or C” mean “any of the following: A; B; C; A and B; A and C; B and C; A, B and C.” An exception to this definition will occur only when a combination of elements, functions, steps or acts are in some way inherently mutually exclusive. 
       FIG.  1    illustrates a cross-sectional view of a moving magnet motor assembly. In one aspect, assembly  100  may be, for example, a moving magnet motor integrated within an electro-dynamic or electro-acoustic transducer that converts electrical signals into vibrations and/or audible signals that can be output from a device within which assembly  100  is integrated. For example, assembly  100  may be a loudspeaker moving magnet motor. In another aspect, assembly  100  may be a shaker used to actuate or vibrate any type of surface or structure coupled thereto, to provide, for example, a haptic output. For example, assembly  100  may be a loudspeaker and/or shaker integrated within a smart phone, or other similar portable electronic device. In some cases, assembly  100  may be attached to a surface of the device to actuate (e.g., vibrate) the surface. Assembly  100  may be enclosed within a housing or enclosure of the device within which it is integrated. 
     Assembly  100  may generally include a frame  102 , a stationary portion  104  and a moving portion  106  that moves relative to the stationary portion  104  and frame  102 . The frame  102  may be any type of support structure that can support components of the assembly and be used to integrate the assembly within a surrounding device (e.g., a portable electronic device). In some aspects, frame  102  may be part of the housing of the device within which assembly  100  is integrated. Stationary portion  104  may, in one aspect, include one or more coil(s)  108  fixedly connected to the frame  102 . The one or more coil(s)  108  may, for example, be a voice coil formed by a copper wire winding. The voice coil  108  may be mounted at one end to a bottom wall or side  110  of frame  102 . In this aspect, the voice coil may have a winding height that runs vertically, or parallel to the z-height of assembly  100 , as shown. The other end (e.g., a top end) of the coil  108  may be free and not directly attached to any other structure or component of the assembly  100 . During operation, the coil  108  may be energized by an electric current in a desired direction and used to drive a movement of the moving portion  106 . 
     The moving portion  106  may include a first magnet member  112  and a second magnet member  114  that together define a gap  116  within which the coil  108  is positioned. The first magnet member  112  and the second magnet member  114  may form a closed magnetic circuit that focuses the magnetic flux density toward coil  108 . In this aspect, upon application of an electric current to coil  108 , the coil reacts to the magnetic field from the closed magnetic circuit causing the first magnet member  112  and the second magnet member  114  to move or translate along an axis of translation  122 , as illustrated by the arrows. The axis of translation  122  may, for example, be parallel to the z-axis of assembly  100 . In some aspects, the axis of translation  122  may be considered running in an axial direction and may define an axis of symmetry of assembly  100 . In still further aspects, the axis of translation  122  may be considered parallel to, or running in the same direction as, the winding height of coil  108  or a height of the gap  116  defined by the first and second magnet members  112 ,  114 . The first magnet member  112  and second magnet member  114  are, in turn, connected to an actuating surface  118  that is coupled to the frame  102  by a suspension member  120 . Since the first magnet member  112  and the second magnet member  114  are part of the same moving mass, the first magnet member  112  and the second magnet member  114  move together and drive a movement of the actuating surface  118  along the axis of translation  122 . Since the highest concentration of flux density occurs between the first magnet member  112  and the second magnet member  114 , the dominant magnetic flux density moves with the moving mass, without much degradation depending on the position of the actuating surface  118  coupled thereto. This dominant flux density region, moving over the coil  108  allows for a larger excursion of the actuating surface  118  (e.g., diaphragm), without observing reverse magnetic field disturbance as previously discussed. Accordingly, assembly  100  achieves a moving magnet motor system that drives an actuating surface with large excursion and low distortion values. 
     Referring now in more detail to the first magnet member  112  and the second magnet member  114 , in some aspects, at least one of the first magnet member  112  and/or the second magnet member  114  may be a polarized magnet. The polarized magnet may be a radially polarized magnet that is orientated within the assembly such that the North and South poles are arranged radially relative to axis of translation  122 . In other words, facing the left or right side as viewed in  FIG.  1   . In still further aspects, one of the first magnet member  112  or the second magnet member  114  may be a flux concentrating member or structure operable to focus the magnetic flux lines of the polarized magnet (e.g., magnet member  112  or  114 ). Representatively, one of the first magnet member  112  or the second magnet member  114  may be a soft magnetic material such as a steel material that is operable to focus the magnetic flux lines. For example, in one aspect, the first magnet member  112  may be a radially polarized permanent magnet and the second magnet member  114  may be a non-polarized steel member that moves with the first magnet member  112  along the coil  108  to focus the magnetic flux lines toward the coil  108 . In another aspect, the second magnet member  114  may be a radially polarized magnet and the first magnet member  112  may be a non-polarized steel member. In still further aspects, both the first magnet member  112  and the second magnet member  114  may be radially polarized magnets that move along the coil  108  to focus the magnetic flux lines. In all cases, however, at least one of the first magnet member  112  or second magnet member  114  should be a radially polarized magnet positioned along one side of coil  108  and the other of the first magnet member  112  or the second magnet member  114  should be a structure which can concentrate the magnetic flux lines toward the coil  108  (e.g. a radially polarized magnet or a soft magnetic material such as steel). 
     Referring now in more detail to actuating surface  118 , actuating surface  118  may be, for example, a sound radiating surface such as a loud speaker diaphragm that is caused to vibrate by the magnet members  112 ,  114 , and outputs sound. In other aspects, actuating surface  118  may be any type of surface where a movement or vibration is desired. For example, in other aspects, the actuating surface  118  may be a wall of a housing or enclosure, such as the enclosure of a device within which assembly  100  is integrated, or another surface or structure that can be used to create, for example, a haptic output felt by the user. The suspension member  120  may be a relatively compliant structure that is strong enough to suspend the first magnet  112 , second magnet member  114  and actuating surface  118  from frame  102 , while also allowing each of these components to move relative to coil  108  and frame  102 . For example, the first magnet member  112  and the second magnet member  114  may be attached to one another by a connecting member  124 A (e.g., a bracket, fastener, or the like), and the actuating surface  118  and/or the suspension member  120  may connected to the first or second member  112 ,  114  by another connecting member  124 B (e.g., a bracket, fastener or the like). 
     In addition, although an assembly including a single coil  108 , first magnet member  112  and second magnet member  114  are shown, any number of coils and/or magnet members are contemplated. For example, assembly  100  may include a pair of coils  108 , a pair of first magnet members  112  and/or a pair of second magnet members  114 . In addition, it is contemplated that the coil  108 , first magnet member  112  and second magnet member  114  may be annularly shaped components. For example, coil  108 , magnet member  112  and magnet member  114  may have a circular, elliptical or racetrack like shape. In this aspect, first magnet member  112  may be considered an inner magnet member  112  surrounded by coil  108  and second magnet member  114  may be considered an outer magnet member that surrounds coil  108 . Said another way, first magnet member  112  may be considered radially inward to coil  108 , coil  108  may be radially inward to second magnet member  114  and second magnet member  114  may be radially outward to coil  108 . 
     Various magnet member/coil configurations for assembly  100  will now be described in more detail in reference to  FIGS.  2 - 11   .  FIGS.  2 - 11    illustrate cross-sectional side views of a right hand side of various assembly configurations. It should be understood that the assembly is symmetrical therefore the left hand side (not shown) will be a mirror image of the right hand side illustrated in  FIGS.  2 - 11   . For example, the axis of translation  122  shown in each of the Figures may be considered an axis of symmetry about which the assembly is considered symmetrical. In addition, it is noted that some aspects such as the frame and actuating surface are omitted from  FIGS.  2 - 11    for ease of illustration. The omitted aspects should, however, be understood as being included in the complete assembly for  FIGS.  2 - 11    as previously discussed in reference to  FIG.  1   . 
     Referring now to  FIG.  2   ,  FIG.  2    illustrates assembly  200  having a stationary portion  104  including a pair of coils  208 A,  208 B and a moving portion  106  including a pair of first magnet members  212 A,  212 B and a second magnet member  214 . As previously discussed, the moving portion  106  (e.g., first magnet members  212 A-B and second magnet member  214 ) moves relative to the stationary portion  104  (e.g., coils  208 A-B). In particular, each of the first magnet members  212 A-B and second magnet member  214  translate together along the axis of translation  122  relative to coils  208 A-B as illustrated by the arrow. The first magnet members  212 A-B may both be radially polarized magnets which are oriented with their poles in the same direction as shown. The second magnet member  214  may be a flux concentrating member (e.g., a soft magnetic material such as steel) that concentrates the magnetic flux lines  224  generated by the first magnet members  212 A-B within a region of concentrated or focused flux density  226 . In this aspect, as the first magnet members  212 A-B and second magnet member  214  translate together along coils  208 A-B, which are positioned within the gaps  216 A,  216 B formed by the magnet members, the region of focused flux density  226  also travels along the winding height of coils  208 A-B. As a result, a dominant flux density region can be maintained along the entire height of the coils  208 A-B. This, in turn, enables larger excursions of the actuating surface (e.g., actuating surface  118 ) connected to the moving portion  106  without observing reverse magnetic field disturbance. 
     Referring now in more detail to the pair of coils  208 A-B, coils  208 A-B may in some aspects be separate voice coils that each have a winding height running parallel to the z-axis, or in a z-height direction as shown. Depending on the requirements from, for example the associated loudspeaker, coils  208 A-B can be in series or parallel with a same direction of current so they are constructive. Both of coils  208 A-B should have the same orientation (e.g., both coils into the plane, or both coils out of the plane). Coils  208 A-B may have the same winding height as shown, which in some cases may be greater than a height of the magnet members of the moving portion  106  and gaps  216 A-B as shown. In other aspects, coils  208 A-B may have different winding heights. Each of coils  208 A-B may, however, be considered continuous coils in that they have one continuous and uninterrupted winding height, in some cases formed by a single copper wire. In other words, coils  208 A-B are not formed by coil sections or segments stacked one on top of the other to achieve the desired overall height shown in the Figures. In addition, as previously discussed, in some aspects, coils  208 A-B are annularly shaped coils therefore coil  208 A may be considered an inner coil and coil  208 B may be considered an outer coil. Said another way coil  208 A may be considered radially inward to coil  208 B, or coil  208 B may be considered radially outward to coil  208 A. 
     Similarly, the magnet members  212 A-B and  214  of the moving portion  106  may be annularly shaped members (e.g., circular, elliptical, race track like shape or the like). In this aspect, first magnet members  212 A-B may be considered inner and outer magnet members, respectively, and second magnet member  214  may be a middle magnet member between the inner and outer magnet members  212 A-B. Still further, the coil gap  216 A may be considered an inner gap formed between inner magnet member  212 A and middle magnet member  214 , and coil gap  216 B may be considered an outer gap formed between middle magnet member  214  and outer magnet member  212 B. 
     As previously discussed, both first magnet members  212 A and  212 B may be radially polarized magnets and second magnet member  214  may be a flux concentrating member, for example, a steel structure. Each of the first magnet members  212 A-B and second magnet member  214  may have a same height (dimension along the z-axis), or may have different heights. For example, in another aspect, each of first magnet members  212 A-B and second magnet member  214  may have different heights that decrease toward the axis of translation  222  (which corresponds to the axis of symmetry). Regardless of the heights of the first and second magnet members  212 A-B,  214 , they may be considered to have a relatively large displacement range along the axis of translation that is equal to or less than the winding height of the coils  208 A-B. In particular, the positive magnetic field is focused over a certain area of the magnet assembly such that when it moves along the coils  208 A-B, it is not impacted by the reverse magnetic field (which is weaker than the focused positive magnetic field), and therefore the overall sum of magnetic field is not impacted, and hence the force from the circuitry not impacted. Thus, since the moving portion  106  carries the positive magnetic field along the entire height of the coils  208 A-B, which over powers the reverse magnetic field, a positive force occurs along the entire height of the coil thus allowing for an improved displacement range. This is in comparison to open circuit systems without a focused magnetic flux region and which do not move along the coil and therefore they may lose force along certain regions of the coil. 
     Referring now to  FIG.  3   ,  FIG.  3    illustrates assembly  300 , which is similar to the previously discussed assemblies in that it includes a stationary portion  104  and a moving portion  106  that moves relative to the stationary portion  104  along the axis of translation  122 . In assembly  300 , however, the stationary portion  104  includes a single coil  308 , and the moving portion  106  includes a single first magnet member  312  and single second magnet member  314  that are connected together and move relative to coil  308 . The first magnet member  312  may be a radially polarized magnet positioned radially outward of the coil  308 . The second magnet member  314  may be a flux concentrating member, for example a steel structure, positioned radially inward of the coil  308 . As previously discussed, second magnet member  314  concentrates the magnetic flux lines  324  generated by the first magnet member  312  within a region of concentrated or focused flux density  326 . In this aspect, as the first magnet member  312  and second magnet member  314  translate together along coil  308 , which is positioned within the gaps  316  formed by the magnet members, the region of focused flux density  326  also travels along the winding height of coil  308 . As a result, as previously discussed, a dominant flux density region can be maintained along the entire height of the coil  308 , and in turn, larger excursions of the actuating surface (e.g., actuating surface  118 ) connected to the moving portion  106  can be achieved. 
     Referring now to  FIG.  4   ,  FIG.  4    illustrates assembly  400 , which is similar to the previously discussed assemblies in that it includes a stationary portion  104  and a moving portion  106  that moves relative to the stationary portion  104  along the axis of translation  122 . In assembly  400 , however, the stationary portion  104  includes a pair of coils  408 A and  408 B, and the moving portion  106  includes a single first magnet member  412  and a pair of second magnet members  414 A and  414 B that are connected together (and to an actuating surface) and move relative to coils  408 A-B. The first magnet member  412  may be a radially polarized magnet positioned between the pair of coils  408 A-B. The pair of second magnet members  414 A-B may flux concentrating members, for example steel structures, positioned on opposite sides of the coils  408 A-B, for example, radially inward of the coil  408 A and radially outward of the coil  408 B. As previously discussed, second magnet members  414 A-B concentrate the magnetic flux lines  424  generated by the first magnet member  412  within a region of concentrated or focused flux density  426 . In this aspect, as the first magnet member  412  and second magnet members  414 A-B translate together along coils  408 A-B, which is positioned within the gaps  416 A,  416 B formed by the magnet members, the region of focused flux density  426  also travels along the winding height of coils  408 A-B. As a result, as previously discussed, a dominant flux density region can be maintained along the entire height of the coils  408 A-B, and in turn, larger excursions of the actuating surface (e.g., actuating surface  118 ) connected to the moving portion  106  can be achieved. 
     Referring now to  FIG.  5   ,  FIG.  5    illustrates assembly  500 , which is similar to the previously discussed assemblies in that it includes a stationary portion  104  and a moving portion  106  that moves relative to the stationary portion  104  along the axis of translation  122 . In assembly  500 , however, the stationary portion  104  includes a single coil  508 , and the moving portion  106  includes a single first magnet member  512  and a single second magnet members  514  that are connected together (and to an actuating surface) and move relative to coil  508 . The first magnet member  512  may be a radially polarized magnet positioned radially inward of coil  508 . The second magnet member  514  may a flux concentrating member, for example a steel structure, positioned radially outward of coil  508 . As previously discussed, second magnet member  514  concentrates the magnetic flux lines  524  generated by the first magnet member  512  within a region of concentrated or focused flux density  526 . In this aspect, as the first magnet member  512  and second magnet member  514  translate together along coil  508 , which is positioned within the gap  516  formed by the magnet members, the region of focused flux density  526  also travels along the winding height of coil  508 . As a result, as previously discussed, a dominant flux density region can be maintained along the entire height of the coil  508 , and in turn, larger excursions of the actuating surface (e.g., actuating surface  118 ) connected to the moving portion  106  can be achieved. 
     Referring now to  FIG.  6   ,  FIG.  6    illustrates assembly  600 , which is similar to the previously discussed assemblies in that it includes a stationary portion  104  and a moving portion  106  that moves relative to the stationary portion  104  along the axis of translation  122 . In assembly  600 , however, the stationary portion  104  includes a pair of coils  608 A and  608 B, and the moving portion  106  includes three first magnet members  612 A,  612 B and  612 C that are attached together (and an actuating surface) and move relative to coils  608 A,  608 B. The first magnet members  612 A-C may be radially polarized magnets positioned in a same direction (e.g., North and south poles facing the same direction) between and outside of the pair of coils  608 A-B. In this aspect, the first magnet members  612 A-C act as flux concentrating members for each other and concentrate the magnetic flux lines  624  generated by the first magnet member  612  within a region of concentrated or focused flux density  626 . In this aspect, as the first magnet members  612 A-C translate together along coils  608 A-B, which are positioned within the gaps  616 A,  616 B formed by the magnet members, the region of focused flux density  626  also travels along the winding height of coils  608 A-B. As a result, as previously discussed, a dominant flux density region can be maintained along the entire height of the coils  608 A-B, and in turn, larger excursions of the actuating surface (e.g., actuating surface  118 ) connected to the moving portion  106  can be achieved. 
     Referring now to  FIG.  7   ,  FIG.  7    illustrates assembly  700 , which is similar to the previously discussed assemblies in that it includes a stationary portion  104  and a moving portion  106  that moves relative to the stationary portion  104  along the axis of translation  122 . In assembly  700 , however, the stationary portion  104  includes a pair of coils  708 A and  708 B, and the moving portion  106  includes a pair of first magnet members  712 A,  712 B, a single second magnet member  714  and a pair of third magnet members  730 A,  730 B coupled to the first magnet members  712 A-B that are connected together (and to an actuating surface) and all move relative to coils  708 A,  708 B. The first magnet members  712 A-B may be radially polarized magnets positioned radially outward of the pair of coils  708 A-B, and the second magnet member  714  is positioned between coils  708 A-B. The second magnet member  714  may be a flux concentrating member (e.g., a steel structure) that concentrate the magnetic flux lines  724  generated by the first magnet member  712 A-B within a region of concentrated or focused flux density  726 . The third magnet members  730 A-B may be flux concentrating members that are directly attached to the surfaces of the first magnet members  712 A-B facing the coils  708 A-B. Representatively, third magnet members  730 A-B may be a soft magnetic material similar to the second magnet member  714 , for example, a steel material, that is attached to the surfaces of the first magnet members  712 A-B. For example, third magnet member  730 A may be attached to an outer surface of the first magnet member  712 A that faces coil  708 A, and third magnet member  730 B may be attached to an inner surface of the first magnet member  712 B that faces coil  708 B. In this aspect, as the first magnet members  712 A-B with third magnet members  730 A-B attached and second magnet member  714  translate together along coils  708 A-B, which are positioned within the gaps  716 A,  716 B formed by the magnet members, the region of focused flux density  726  also travels along the winding height of coils  708 A-B. As a result, as previously discussed, a dominant flux density region can be maintained along the entire height of the coils  708 A-B, and in turn, larger excursions of the actuating surface (e.g., actuating surface  118 ) connected to the moving portion  106  can be achieved. 
     Referring now to  FIG.  8   ,  FIG.  8    illustrates assembly  800 , which is similar to the previously discussed assemblies in that it includes a stationary portion  104  and a moving portion  106  that moves relative to the stationary portion  104  along the axis of translation  122 . In assembly  800 , however, the stationary portion  104  includes a single coil  808 , and the moving portion  106  includes a single first magnet member  812 , a single second magnet member  814  and a third magnet member  830  coupled to the first magnet members  812  that are connected to one another (and an actuating surface) and all move relative to coil  808 . The first magnet member  812  may be a radially polarized magnet positioned radially outward of the coil  808 , and the second magnet member  814  is positioned radially inward of the coil  808 . The second magnet member  814  may be a flux concentrating member (e.g., a steel structure) that concentrates the magnetic flux lines  824  generated by the first magnet member  812  within a region of concentrated or focused flux density  826 . The third magnet member  830  may be a flux concentrating member that is directly attached to the surface of the first magnet member  812  facing the coil  808 . Representatively, third magnet member  830  may be a soft magnetic material similar to the second magnet member  814 , for example, a steel material, that is attached to the surface of the first magnet members  812 . For example, third magnet member  730  may be attached to an inner surface of the first magnet member  812  that faces coil  808 . In this aspect, as the first magnet member  812  with third magnet member  830  attached and second magnet member  814  translate together along coil  808 , which is positioned within the gap  816  formed by the magnet members, the region of focused flux density  826  also travels along the winding height of coil  808 . As a result, as previously discussed, a dominant flux density region can be maintained along the entire height of the coil  808 , and in turn, larger excursions of the actuating surface (e.g., actuating surface  118 ) connected to the moving portion  106  can be achieved. 
     Referring now to  FIG.  9   ,  FIG.  9    illustrates assembly  900 , which is similar to the previously discussed assemblies in that it includes a stationary portion  104  and a moving portion  106  that moves relative to the stationary portion  104  along the axis of translation  122 . In assembly  900 , however, the stationary portion  104  includes a pair of coils  908 A and  908 B, and the moving portion  106  includes a pair of first magnet members  912 A,  912 B, a single second magnet member  914  and four third magnet members  930 A,  930 B,  930 C and  930 D coupled to each of the inner and outer surfaces of the first magnet members  912 A-B that all move relative to coils  908 A,  908 B. The first magnet members  912 A-B may be radially polarized magnets positioned radially outward and inward of the pair of coils  908 A-B as shown, and the second magnet member  914  is positioned between coils  908 A-B. The second magnet member  914  may be a flux concentrating member (e.g., a steel structure) that concentrate the magnetic flux lines  924  generated by the first magnet members  912 A-B within a region of concentrated or focused flux density  926 . The third magnet members  930 A-D may be flux concentrating members that are directly attached to the surfaces of the first magnet members  912 A-B. Representatively, third magnet members  930 A-D may be a soft magnetic material similar to the second magnet member  914 , for example, a steel material, that is attached to the surfaces of the first magnet members  912 A-B. For example, third magnet member  930 A may be attached to an inner surface of the first magnet member  912 A that faces a center of the assembly, third magnet member  912 B may be attached to an outer surface of the first magnet member  912 A that faces coil  908 A, third magnet member  930 C may be attached to an inner surface of the first magnet member  912 B that faces coil  908 B and third magnet member  930 D may be attached to an outer surface of first magnet member  912 B facing away from coil  908 B. In this aspect, as the first magnet members  912 A-B with third magnet members  930 A-D attached and second magnet member  914  translate together along coils  908 A-B, which are positioned within the gaps  916 A,  916 B formed by the magnet members, the region of focused flux density  926  also travels along the winding height of coils  908 A-B. As a result, as previously discussed, a dominant flux density region can be maintained along the entire height of the coils  908 A-B, and in turn, larger excursions of the actuating surface (e.g., actuating surface  118 ) connected to the moving portion  106  can be achieved. 
     Referring now to  FIG.  10   ,  FIG.  10    illustrates assembly  1000 , which is similar to the previously discussed assemblies in that it includes a stationary portion  104  and a moving portion  106  that moves relative to the stationary portion  104  along the axis of translation  122 . In assembly  1000 , however, the stationary portion  104  includes a single coil  1008 , and the moving portion  106  includes a single first magnet member  1012 , a single second magnet member  1014  and a pair of third magnet members  1030 A,  1030 B coupled to the first magnet member  1012  that are attached to each other (and an actuating surface) and all move relative to coil  1008 . The first magnet member  1012  may be a radially polarized magnet positioned radially outward of the coil  1008 , and the second magnet member  1014  is positioned radially inward of the coil  1008 . The second magnet member  1014  may be a flux concentrating member (e.g., a steel structure) that concentrates the magnetic flux lines  1024  generated by the first magnet member  1012  within a region of concentrated or focused flux density  1026 . The third magnet members  1030 A-B may be flux concentrating members that are directly attached to the inner and outer surfaces of the first magnet member  1012 . Representatively, third magnet member  1030 A-B may be soft magnetic materials similar to the second magnet member  1014 , for example, a steel material, that are attached to the surfaces of the first magnet members  1012 . For example, third magnet member  1030 A may be attached to an inner surface of the first magnet member  1012  that faces coil  1008  and third magnet member  1030 B may be attached to an outer surface of first magnet member  1012  facing away from coil  1008 . In this aspect, as the first magnet member  1012  with third magnet members  1030 A-B attached and second magnet member  1014  translate together along coil  1008 , which is positioned within the gap  1016  formed by the magnet members, the region of focused flux density  1026  also travels along the winding height of coil  1008 . As a result, as previously discussed, a dominant flux density region can be maintained along the entire height of the coil  1008 , and in turn, larger excursions of the actuating surface (e.g., actuating surface  118 ) connected to the moving portion  106  can be achieved. 
     Referring now to  FIG.  11   ,  FIG.  11    illustrates assembly  1100 , which is similar to the previously discussed assemblies in that it includes a stationary portion  104  and a moving portion  106  that moves relative to the stationary portion  104  along the axis of translation  122 . In assembly  1100 , however, the stationary portion  104  includes a single coil  1108 , and the moving portion  106  includes a pair of first magnet members  1112 A,  112 B and a pair of third magnet member  1130 A,  1130 B coupled to the first magnet members  1112 A-B that all move relative to coil  1108 . The moving portion  106  in this aspect therefore omits the previously discussed second magnet member (e.g., magnet member  1014 ). The first magnet member  1112 A may be a radially polarized magnet positioned radially inward of the coil  1108  and the first magnet member  1112 B is positioned radially outward of the coil  1108 . The third magnet members  1130 A-B may be flux concentrating members (e.g., a steel structure) attached to surfaces of the first magnet members  1112 A-B facing coil  1108 . The third magnet members  1130 A-B may be flux concentrating members that concentrate the magnetic flux lines  1124  generated by the first magnet member  1112 A-B within a region of concentrated or focused flux density  1126 . The third magnet members  1130 A-B may be directly attached to the surfaces of the first magnet members  1112 A-B facing the coil  1108 . Representatively, third magnet member  1130 A may be a soft magnetic material such as a steel material that is attached to the outer surface of the first magnet member  1112 A and third magnet member  1130 B may be a soft magnetic material such as a steel material attached to the inner surface of the first magnet member  1112 B. In this aspect, as the first magnet members  1112 A-B with third magnet members  1130 A-B attached translate together along coil  1108 , which is positioned within the gap  1116  formed by the magnet members, the region of focused flux density  1126  also travels along the winding height of coil  1108 . As a result, as previously discussed, a dominant flux density region can be maintained along the entire height of the coil  1108 , and in turn, larger excursions of the actuating surface (e.g., actuating surface  118 ) connected to the moving portion  106  can be achieved. 
       FIG.  12    illustrates a simplified schematic perspective view of an exemplary electronic device in which a transducer assembly as described herein, may be implemented. As illustrated in  FIG.  12   , the transducer assembly may be integrated within a consumer electronic device  1202  such as a smart phone with which a user can conduct a call with a far-end user of a communications device  1204  over a wireless communications network; in another example, the transducer assembly may be integrated within the housing of a tablet computer  1206 . These are just two examples of where the transducer assembly described herein may be used; it is contemplated, however, that the transducer assembly may be used with any type of electronic device, for example, a home audio system, any consumer electronics device with audio capability, or an audio system in a vehicle (e.g., an automobile infotainment system). 
       FIG.  13    illustrates a block diagram of some of the constituent components of an electronic device in which the transducer assembly disclosed herein may be implemented. Device  1300  may be any one of several different types of consumer electronic devices, for example, any of those discussed in reference to  FIG.  12   . 
     In this aspect, electronic device  1300  includes a processor  1312  that interacts with camera circuitry  1306 , motion sensor  1304 , storage  1308 , memory  1314 , display  1322 , and user input interface  1324 . Main processor  1312  may also interact with communications circuitry  1302 , primary power source  1310 , transducer  1318  and microphone  1320 . Transducer  1318  may be a speaker and/or the transducer assembly described herein. The various components of the electronic device  1300  may be digitally interconnected and used or managed by a software stack being executed by the processor  1312 . Many of the components shown or described here may be implemented as one or more dedicated hardware units and/or a programmed processor (software being executed by a processor, e.g., the processor  1312 ). 
     The processor  1312  controls the overall operation of the device  1300  by performing some or all of the operations of one or more applications or operating system programs implemented on the device  1300 , by executing instructions for it (software code and data) that may be found in the storage  1308 . The processor  1312  may, for example, drive the display  1322  and receive user inputs through the user input interface  1324  (which may be integrated with the display  1322  as part of a single, touch sensitive display panel). In addition, processor  1312  may send a current or signal (e.g., audio signal) to transducer  1318  to facilitate operation of transducer  1318 . Representatively, the processor  1312  may send a current or signal to one or more components of a transducer assembly (e.g., assemblies  100 - 1100 ) to drive the components independently or together. For example, the coils  108 - 1108  could be driven independently by different channels on the amplifier, or together by the same channel, depending on the application needs. 
     Storage  1308  provides a relatively large amount of “permanent” data storage, using nonvolatile solid state memory (e.g., flash storage) and/or a kinetic nonvolatile storage device (e.g., rotating magnetic disk drive). Storage  1308  may include both local storage and storage space on a remote server. Storage  1308  may store data as well as software components that control and manage, at a higher level, the different functions of the device  1300 . 
     In addition to storage  1308 , there may be memory  1314 , also referred to as main memory or program memory, which provides relatively fast access to stored code and data that is being executed by the processor  1312 . Memory  1314  may include solid state random access memory (RAM), e.g., static RAM or dynamic RAM. There may be one or more processors, e.g., processor  1312 , that run or execute various software programs, modules, or sets of instructions (e.g., applications) that, while stored permanently in the storage  1308 , have been transferred to the memory  1314  for execution, to perform the various functions described above. 
     The device  1300  may include communications circuitry  1302 . Communications circuitry  1302  may include components used for wired or wireless communications, such as two-way conversations and data transfers. For example, communications circuitry  1302  may include RF communications circuitry that is coupled to an antenna, so that the user of the device  1300  can place or receive a call through a wireless communications network. The RF communications circuitry may include a RF transceiver and a cellular baseband processor to enable the call through a cellular network. For example, communications circuitry  1302  may include Wi-Fi communications circuitry so that the user of the device  1300  may place or initiate a call using voice over Internet Protocol (VOIP) connection, transfer data through a wireless local area network. 
     The device may include a transducer  1318 . Transducer  1318  may be a speaker and/or a transducer assembly such as that described in reference to  FIGS.  1 - 12   . Transducer  1318  may be an electric-to-acoustic transducer or sensor that converts an electrical signal input (e.g., an acoustic input) into a sound or vibration output. The circuitry of the speaker may be electrically connected to processor  1312  and power source  1310  to facilitate the speaker operations as previously discussed (e.g, diaphragm displacement, etc). 
     The device  1300  may further include a motion sensor  1304 , also referred to as an inertial sensor, that may be used to detect movement of the device  1300 , camera circuitry  1306  that implements the digital camera functionality of the device  1300 , and primary power source  1310 , such as a built in battery, as a primary power supply. 
     While certain aspects have been described and shown in the accompanying drawings, it is to be understood that such aspects are merely illustrative of and not restrictive on the broad disclosure, and that the disclosure is not limited to the specific constructions and arrangements shown and described, since various other modifications may occur to those of ordinary skill in the art. The description is thus to be regarded as illustrative instead of limiting. In addition, to aid the Patent Office and any readers of any patent issued on this application in interpreting the claims appended hereto, applicants wish to note that they do not intend any of the appended claims or claim elements to invoke 35 U.S.C. 112(f) unless the words “means for” or “step for” are explicitly used in the particular claim.

Metadata:
Filing Date: 20231017
Publication Date: 20240917
Grant Date: 20240917
Priority Date: 20210414
Inventors: ILKORUR, ONUR I.
LEONHARDT, Oliver
DONARSKI, MATTHEW A.
WILK, CHRISTOPHER
Assignee: APPLE INC
CPC Classifications: [{"code": "H04R9/06", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R2499/11", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R2400/11", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R7/04", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04M1/62", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R1/025", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R9/046", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/24", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R2499/11", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R11/02", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R31/00", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R9/06", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R9/046", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R9/045", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R9/04", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R9/025", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04M1/03", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04R9/025", "inventive": true, "first": true, "tree": "[]"}, {"code": "H04R2499/11", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R2400/11", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04M1/62", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04R9/06", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R9/046", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R7/04", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R1/025", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04R9/025", "inventive": true, "first": true, "tree": "[]"}]
Family ID: 83447292