TW201735663A - Electroacoustic transducer with improved frame construction - Google Patents

Abstract

A new audio transducer for mobile devices, in particular for a micro speaker, having a pot plate, a collar, a membrane, a magnet system and a coil assembly. The magnet system may optionally comprise a ring plate affixed to a population of outer magnets. Said collar is directly mounted to said ring plate and/or to said pot plate.

Description

Electroacoustic transducer with improved frame structure

The present invention relates to an audio transducer, such as a speaker or a receiver for converting an electrical audio signal into a sound. The present invention is also directed to a microspeaker that is optimized to achieve a high acoustic output and is located within a small volume of a mobile device such as a mobile phone, a tablet, a gaming device, a notebook or the like. .

Prior art microspeakers for use in mobile devices include a coil that is fixed to the diaphragm of the speaker. The coil includes two leads for feeding an electrical signal into the coil. The coil is disposed in a magnetic field formed by a plurality of magnets. The electrical signal fed into the coil causes the coil and the associated diaphragm to vibrate, which produces a sound associated with the electrical signal. Prior art microspeakers include a plastic frame that is used to align and secure a number of parts of the speaker. The frame includes a contact pad that provides a dielectric interface between the coil and the audio electronics of the mobile device. A particular disadvantage of the above types of speakers based connection between the plastic part and the metal frame of the speaker. Often, gluing different materials (glching metal to plastic here) can cause problems. In particular, it is not easy to apply an appropriate amount of glue to a suitable place at the high speed required for mass production. Moreover, this connection typically suffers from relatively low adhesion. In addition, different thermal expansions of the part can induce stress into the diaphragm, which results in poor audio performance. In the long run, the connection can even break. In this context, it should be noted that especially mobile devices are often exposed to extreme temperatures ranging from about -20 ° C to +50 ° C.

One object of the present invention is to have an audio transducer for use in a mobile device without the disadvantages of known transducers. A new type of audio transducer for a mobile device, particularly for a microspeaker, includes a basin plate, a ferrule, a diaphragm, a magnet system, and a coil assembly. The ferrule includes a first portion that is substantially parallel to one of the basin plates, a bore extending through the first portion of the ferrule, and a second portion extending substantially vertically downward from the first portion. One of the perimeters of the diaphragm is attached to the first portion of the ferrule. The magnet system includes: a peripheral magnet assembly having a plurality of outer magnets disposed proximate one of the basin plates; and/or a center magnet assembly having a plurality of center magnet assemblies attached to the basin plate and by the peripheral magnet system An outer magnet surrounds a center magnet; and an air gap is formed in the magnet system. The center magnet assembly can also include a top plate attached to one of the center magnets. Finally, the coil assembly includes a coil located in the air gap, wherein the coil has a pair of electrical leads attached to one of the top sides of the diaphragm and extending from the coil. In a first case A) the ferrule is mounted directly to the basin plate. In an alternative second scenario B), the perimeter magnet assembly includes an annular plate attached to one of a plurality of outer magnets and the ferrule is mounted directly to the annular plate. In still another alternative third scenario C), the perimeter magnet assembly includes an annular plate attached to one of a plurality of outer magnets, and the ferrule is mounted directly to the annular plate and the basin plate. The advantages of this new type of speaker are reduced part count and simplification of its manufacture. In particular, if the ferrule and at least one of the basin plate and the annular plate are made of metal, the ferrule can be welded to the basin plate and/or the annular plate. In this way, a fairly stable configuration is obtained. For example, the side tabs of the ferrule are used to connect the ferrule to the annular plate and/or the basin plate. Welding can be done in particular by means of laser welding. However, other welding methods (for example, ultrasonic welding) are also applicable. Moreover, a particular advantage of the proposed system avoids the use of plastic as a speaker frame and thus to avoid a connection between the plastic frame and a metal part of the speaker. The same type of joining material (in this context, especially metal parts) is generally relatively easy. There are no different thermal expansions of the part, which can induce stress into the diaphragm. Therefore, the speaker benefits from good audio performance. In addition, the connection is stable even in the long run. If the parts are welded, the glue problem can be avoided (for example, the glue is difficult to apply at high speed). The diaphragm can be attached to the ferrule before or after the ferrule is mounted to the annular plate/tubular plate. If the diaphragm is attached to the ferrule before the ferrule is welded to the annular plate/pellet plate, laser welding can be avoided to overheat the diaphragm. Further details and advantages of an disclosed type of audio transducer will become apparent in the following description and the accompanying drawings. In a preferred embodiment, the ferrule includes a support tab extending substantially perpendicularly outward from the second portion, and the coil assembly includes a flexible printed circuit having a pair of contact pads. Each electrical lead is electrically connected to a respective contact pad, and the support tab of the ferrule is attached to the flexible printed circuit. One of the advantages of this new type of loudspeaker is that it reduces the number of electrical connections between the leads of the coil and the driver of the coil. This helps to reduce the number and size of the parts of the microspeaker and helps to increase the sound quality and durability of the speaker. While the embodiment of the audio transducer is shown and illustrated as having a rectangular shape, it will be appreciated that in other embodiments, the audio transducer can have various shapes including, but not limited to, circular and oblong. Therefore, the present invention is not limited to an audio transducer having a rectangular shape.

Various embodiments are set forth herein for various devices. Numerous specific details are set forth to provide a thorough understanding of the <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; However, it will be understood by those skilled in the art that the embodiments may be practiced without the specific details. In other instances, well-known operations, components, and components are not described in detail to avoid obscuring the embodiments set forth in the specification. Those skilled in the art will appreciate that the embodiments illustrated and described herein are non-limiting examples, and thus it is understood that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments. The scope of the embodiments is defined only by the scope of the accompanying claims. A reference to "a variety of embodiments", "an embodiment", "an embodiment" or "an embodiment" is intended to mean that a particular feature, structure, or characteristic In at least one embodiment. Accordingly, the phrase "in various embodiments", "in some embodiments", "in an embodiment" or "in an embodiment" or the like may be used throughout the specification. Refers to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Therefore, the particular features, structures, or characteristics illustrated or described in connection with an embodiment may be combined in whole or in part with the features, structures, or characteristics of one or more other embodiments without limitation. Non-logical or non-functional. It must be noted that the singular forms "a", "the" and "the" In addition, the terms "first", "second", and the like, as used in the description and the scope of the claims, are used to distinguish between similar elements and are not necessarily used to describe a sequence or chronological order. It is to be understood that the terms so used are interchangeable under the appropriate circumstances, such that the embodiments of the invention described herein, by way of example, can be in other forms than those illustrated or illustrated herein. operating. In addition, the terms "comprises", "comprising" and "the" are intended to include a non-exclusive inclusion, such that a program, method, article, or device comprising a series of components is not necessarily limited to the components, but may include not explicitly listed Or other components specific to such procedures, methods, objects or equipment. All directions (eg, "add", "minus", "upper", "lower", "up", "down", "left", "right", "left", "right", " Front, Back, Top, Bottom, Top, Bottom, Top, Bottom, Vertical, Horizontal, Clockwise and Counterclockwise The use of the present invention to assist the reader in understanding the present invention does not limit the use of the position, orientation, or any aspect of the invention. It is to be understood that the terms so used are interchangeable under appropriate circumstances, such that the embodiments of the invention described herein, by way of example, are capable of orientations other than those illustrated or illustrated herein. operating. As used herein, the phrase "configured to/configured for" and similar phrases, devices, or systems are designed and/or constructed (eg, by appropriate hardware, software, and/or A component, or a device, device, or system that does not indicate a target can perform a purpose. Joint references (e.g., "attach", "coupled", "connected", and the like) are to be interpreted broadly and may include intermediate components between the connection of one of several elements and the relative movement of several elements. As such, the joint reference does not necessarily imply that the two elements are directly connected and fixed to each other. All matter contained in the above description or shown in the drawings is intended to be illustrative and not restrictive. Changes in detail or structure may be made without departing from the spirit of the invention as defined in the appended claims. All numbers expressing expressions and the like used in the specification and claims are to be understood as being modified by the term "about." 1 shows an exploded perspective view of a related component of a prior art rectangular microspeaker 10. The speaker 10 includes a membrane 12 that is typically constructed from one or more layers of materials such as ether ketone (PEEK), acrylate and/or thermoplastic elastomer (TEP), polyether sulfilimine (PEI), and/or the technology. Other materials known in the art. The diaphragm 12 can also include a diaphragm plate 14 for tensioning the diaphragm 12. In addition, the speaker 10 includes a coil 32 having one of the leads 34. An electrical signal for driving the coil 32 is fed into the coil 32 through the lead 34. The coil 32 of the assembled speaker 10 is secured to the membrane 12 with an adhesive such as glue, tape or other adhesive known in the art. The speaker 10 includes a magnet system 50 including a perimeter magnet assembly 52 and a center magnet assembly 60. The peripheral magnet assembly 52 includes four magnets 54 disposed on the rectangular side of the rectangular speaker 10 and an annular plate 58 fixed to the magnets 54. The center magnet assembly 60 includes a magnet 62 disposed in the center of the speaker 10 and a top plate 64 secured to the magnet 62. The peripheral magnet assembly 52, the center magnet assembly 60, and the basin plate 80 attached to the peripheral magnet assembly 52 and the center magnet assembly 60 opposite the annular plate 58 and the top plate 64 form a magnetic field guiding portion 68. The magnetic field guiding portion 68 directs and focuses the magnetic fields of the magnets 54 and 62 into an air gap 70 between the peripheral magnet assembly 52 and the central magnet assembly 60, and the coil 32 is disposed in the air gap 70 to the assembled speaker 10. . The prior art microspeaker 10 further includes a frame 90 for assembling and aligning the diaphragm 12 with the magnet system 50. The coil 32 fits into the air gap 70 and is capable of up and down translation within the air gap 70 based on electrical signals that are fed into the coil 32 through the lead 34. The frame 90 is typically made of a molded plastic that enables the frame 90 to have a complex surface with openings that permit air flow and permit attachment of other parts of the speaker 10. The ends of the leads 34 of the coil 32 are soldered to the contact pads 92t which are secured to the top side of the frame 90 during an assembly procedure. As shown in FIG. 2A, the bottom side of the frame 90 includes contact pads 92b that are electrically coupled to contact pads 92t on the top side of the frame 90. As shown in FIG. 2B, another electrical connection is formed with the flexible printed circuit 94 including the contact pads 96. The contact pads 96 of the flexible printed circuit 94 are soldered to the contact pads 92b during an assembly process. Electrical signals for driving the coil 32 are fed into the leads 34 through the flexible printed circuit 94, the contact pads 96, the contact pads 92b, and the contact pads 92t. Additionally, as shown in Figures 2A and 2B, the basin plate 80 includes a bottom vent 98 that permits air flow between a rear volume (not shown) and a rear volume side of the diaphragm 12. The bottom vent 98 permits the diaphragm 12 to vibrate without distortion based on the electrical signals fed into the coil 32. 3, 4, 5 and 7 show related parts of a first embodiment of the present invention. 3 shows an exploded perspective view of the associated components of a rectangular speaker 110. 4 shows a perspective view of one of the coil 132 and one of the flexible printed circuits 136. FIG. 5 shows a top perspective view of one of the related components of the assembled speaker 110. FIG. 6 is a flow chart illustrating one of the methods of manufacturing the speaker 110. FIG. 7 is a top perspective view of one of the assembled speakers 110 located within a housing 190. The speaker 110 includes a diaphragm 112, a ferrule 116, a coil assembly 130, a magnet system 150, and a basin plate 180. The membrane 112 can be constructed from one or more layers of materials such as ether ketone (PEEK), acrylate and/or thermoplastic elastomer (TEP), polyether sulfilimine (PEI), and/or other materials known in the art. The diaphragm 112 can also include a diaphragm plate 114 for tensioning the diaphragm 112. The speaker 110 includes a magnet system 150 including a perimeter magnet assembly 152 and a center magnet assembly 160. The peripheral magnet assembly 152 includes four magnets 154 disposed on a rectangular side of the rectangular speaker 110 and an annular plate 158 fixed to the magnet 154. The center magnet assembly 160 includes a magnet 162 disposed in the center of the speaker 110 and a top plate 164 secured to the magnet 162. The peripheral magnet assembly 152, the center magnet assembly 160, and the basin plate 180 attached to the peripheral magnet assembly 152 and the center magnet assembly 160 opposite the annular plate 158 and the top plate 164 form a magnetic field guide portion 168. The magnetic field guiding portion 168 directs and focuses the magnetic fields of the magnets 154 and 162 into an air gap 170 between the peripheral magnet assembly 152 and the central magnet assembly 160. The coil 132 is disposed in the air gap 170 to the assembled speaker 110. . The speaker 110 includes a coil assembly 130 having a coil 132, a lead 134, and a flexible printed circuit 136. An electrical signal used to drive coil 132 is fed into coil 132 through flexible printed circuit 136 and lead 134. The coil 132 of the assembled speaker 110 is secured to the diaphragm 112 with an adhesive such as glue, tape or other adhesive known in the art. Optionally, the leads 134 of the coil 132 can be directly connected to the flexible printed circuit 136, as shown in the various figures. In this case, the flexible printed circuit 136 includes a pair of contact pads 138 on one of the first terminals of the flexible printed circuit 136, the contact pads 138 being located on a second terminal opposite the first terminal of the printed circuit 136. The contact pads 140 are in electrical communication. Electrical communication between contact pads 140 and 138 can be accomplished using traces and/or vias known in the art. Lead 134 is electrically coupled to contact pad 138 by a solder connection to permit an electrical signal to flow from a source (not shown) into contact pad 140 and through the traces and/or vias in flexible printed circuit 136. Contact pad 138 and through lead 134 flow into coil 132. Those skilled in the art will appreciate that in various embodiments, the electrical connection between lead 134 and flexible printed circuit 136 can be accomplished in a variety of ways known in the art, for example by inserting lead 134 into the attach. To one of the electrical connectors of the flexible printed circuit 136. The electrical connection of the coil 132 can also be implemented in the manner shown in Figures 1-2B. In accordance with the present invention, the frame 90 of the prior art microspeaker 10 is replaced with a ferrule 116 as shown in FIG. The ferrule 116 has a first portion 118 that is substantially horizontal and substantially parallel to the basin plate 180. The coil 132 is translatable through one of the substantially rectangular openings 120 provided in the first portion 118 during operation of the speaker 110. The first portion 118 serves as a rim, and the periphery of the diaphragm 112 is typically attached to the rim by, for example, glue or adhesive. A second portion extends downwardly and substantially perpendicular to the side of the first portion 118 of the ferrule 116, the second portion being shown as a side tab 122. Preferably, the ferrule 116 comprises four (4) side tabs; however, it will be understood that in various embodiments, for example, the ferrule 116 may comprise from about two (2) tabs to about four (4) Tabs (for example, two (2) tabs, three (3) tabs, and four (4) tabs). In other embodiments, the ferrule 116 can include fewer than two (2) tabs. In other embodiments, the ferrule 116 can include more than four (4) tabs. With continued reference to FIG. 3, the ferrule 116 further includes an optional opening 124 that approximates the corner of the ferrule 116 between the tabs 122. Preferably, the ferrule 116 comprises four (4) openings; however, it will be understood that in various embodiments, for example, the ferrule 116 may comprise from about two (2) openings to about four (4) Openings (eg, two (2) openings, three (3) openings, four (4) openings). In other embodiments, the ferrule 116 can include less than two (2) openings. In other embodiments, the ferrule 116 can include more than four (4) openings. The opening 124 serves as a side vent that permits air flow between a rear volume (not shown) and a rear volume side of the diaphragm 112. As illustrated in Figures 3 and 5, the gap 156 between the opening 124 and the magnet 154 of the magnet system 150 is substantially aligned and thus the speaker 110 includes a substantial portion between the back volume and the back volume side of the diaphragm 112. Smooth air passage. Thus, opening 124 permits diaphragm 112 to vibrate without distortion in response to electrical signals fed into coil 132. In the case where the opening 124 is included in the ferrule 116, the venting hole in the basin plate 180 is not required. Since the venting holes on the basin plate 180 are not required, the geometry and/or features of the basin plate 180 can be simplified as compared to the basin plate 80 of prior art speakers, thereby reducing component cost. However, it will be understood that in various embodiments, a rear vent may be provided on the basin plate 180 in addition to or as an alternative to the openings in the ferrule 116. Preferably, the ferrule 116 further includes a stabilizing tab 126 extending substantially horizontally from the right tab 122. As shown in FIG. 5, the stabilizing tab 126 interfaces with the flexible printed circuit 136 for stabilizing the flexible printed circuit 136, providing protection for the electrical connection between the leads 134 and the contact pads 138, and maintaining the ferrule 116 and The position of the coil assembly 130 in the speaker 110. The stabilizing tab 126 is attached to the flexible printed circuit 136 using an adhesive 142 (see FIG. 3) such as glue, tape or other adhesive known in the art. According to a first embodiment of the invention, the ferrule 116 is mounted directly to the basin plate 180, for example glued to the basin plate 180 (case A). For example, the side tabs 122 are used to connect the ferrule 116 to the basin plate 180. In an advantageous embodiment, the ferrule 116 and the basin plate 180 are made of metal, preferably steel. In a further advantageous embodiment, the ferrule 116 is welded to the basin plate 180, in particular by means of laser welding. However, other welding methods (for example, ultrasonic welding) are also applicable. In accordance with another embodiment of the present invention, the ferrule 116 is mounted directly to the annular plate 158, for example, to the annular plate 158 (case B). In an advantageous embodiment, the ferrule 116 and the annular plate 158 are made of metal, preferably steel. In a further advantageous embodiment, the ferrule 116 (especially by means of laser welding) is welded to the annular plate 158. However, other welding methods (for example, ultrasonic welding) are also applicable. In accordance with yet another embodiment of the present invention, the ferrule 116 is mounted directly to the annular plate 158 and the basin plate 180, for example, to the annular plate 158 and the basin plate 180. In an advantageous embodiment, the ferrule 116, the basin plate 180 and the annular plate 158 are made of metal, preferably steel. In a further advantageous embodiment, the ferrule 116 (especially by means of laser welding) is welded to the annular plate 158 and the basin plate 180. However, other welding methods (for example, ultrasonic welding) are also applicable. If the ferrule 116 is mounted to both the annular plate 158 and the basin plate 180, a fairly stable configuration is obtained. For example, the side tabs 122 are used to connect the ferrule 116 to the annular plate 158 and the basin plate 180. The diaphragm 112 can be attached to the ferrule 116 before or after the ferrule 116 is mounted to the annular plate 158 / basin plate 180. If the diaphragm 112 is attached to the ferrule 116 before the ferrule 116 is welded to the annular plate 158 / basin plate 180, laser welding can be avoided to overheat the diaphragm 112. However, if the diaphragm 112 is attached to the ferrule 116 after welding the ferrule 116, laser welding can also be used. Unlike the prior art microspeaker 10 shown in Figures 1, 2A and 2B, the microspeaker 110 does not require a frame 90. In an advantageous embodiment, the microspeaker 110 also does not require a contact pad 92t and a contact pad 92b. By eliminating the additional components needed to transfer electrical signals from the source to the coil 132, the size can be reduced, component and manufacturing costs can be reduced, and the durability and sound of the speaker 110 can be increased as compared to prior art speaker 10. quality. For example, by directly connecting leads 134 to contact pads 138 of flexible printed circuit 136, the number of electrical connections from each lead 134 to the contact pads can be reduced. As shown in Figures 3 and 4, the leads 134 of the coil 132 extend from the side of the coil 132 proximate to the flexible printed circuit 136 and each lead 134 forms a short loop. This allows the length of the lead 134 to be shorter than the lead 34 of the prior art microspeaker 10. However, in other embodiments, for example, the leads 134 of the coil 132 may extend from the side of the coil 132 away from the flexible printed circuit 136 and form a loop inwardly to electrically connect to the contact pads 138 of the flexible printed circuit 136. As shown, the leads 134 extend from the bottom of the coil 132 and can be substantially horizontal and substantially coplanar with the flexible printed circuit 136 when the coil is in the rest position. In various embodiments, the speaker 110 can also include one or more of the support members for supporting the coil 132 and/or the lead 134 as set forth in US Provisional Application No. 62/147,801, April 15, 2015. The entire disclosure of this U.S. Provisional Application Serial No The assembled speaker 110 is shown in FIG. Referring now to Figure 6, an embodiment of an assembled speaker 110 is illustrated. At step 600, the leads 134 of the coil 132 are soldered to the contact pads 138 of the flexible printed circuit 136 to form the coil assembly 130. At step 602, the coil assembly 130 is placed within the peripheral magnet assembly 152, with the leads 134 forming a loop around the right magnet 154 of the perimeter magnet assembly 152. At step 604, the ferrule 116 is placed on and around the top of the perimeter magnet assembly 152 and the support tabs 126 of the ferrule 116 are attached to the flexible printed circuit 136 of the coil assembly 130. At step 606, the basin plate 180 is attached to the magnet 154 of the peripheral magnet assembly 152 on the opposite side of the annular plate 158 along with the center magnet assembly 160. At step 608, the perimeter of the diaphragm 112 is attached to the ferrule 116, the ferrule 116 is attached to the annular plate 158 and the basin plate 180 and the coil 132 is attached to the diaphragm 112. This method forms an assembled speaker 110 as shown in FIG. Instead of using both the center magnet assembly and the peripheral magnet assembly, it is also possible to use only the center magnet assembly or the peripheral magnet assembly. Although the various steps are set forth in a sequence, it is to be understood that other embodiments of the method can be carried out in any order and/or without all of the steps set forth without departing from the scope of the invention. In particular, the diaphragm 112 can be attached to the ferrule 116 before the ferrule 116 is installed (welded) to the basin plate 180 / annular plate 158. Additionally, it should be noted that the ferrule 116 may only be attached to the basin plate 180 or the annular plate 158. Further, the annular plate 158 is not a necessary part of the speaker 110 as mentioned before and may be omitted. The assembled speaker 110 can be mounted in a housing 190 as shown in FIG. Enclosure 190 is illustrated as having one of the sound paths terminating in a side firing 192; however, it will be understood that in various embodiments, the enclosure of speaker 110 may comprise terminating at a top or One of the sound paths in the bottom shot. Enclosure 190 further includes a passage through which flexible printed circuit 136 extends such that it can be coupled to a circuit source (not shown) for driving speaker 110. 8A, 8B illustrate and illustrate another embodiment of the speaker 210 of the present invention. Certain features of one or more of the speakers 110 and 210 are common to one another, and thus the description of such features in one embodiment should be understood as being applicable to other embodiments. In addition, the specific features and aspects of one embodiment may be used in combination with the specific features and aspects of the other embodiments, or may be substituted for the specific features and aspects of the other embodiments. Referring to Figure 8A, a portion of the speaker 210 is shown. The speaker 210 includes a diaphragm 112, a ferrule 216, a coil assembly 130, a magnet system 150, and a basin plate 180. The speaker 210 is substantially identical to the speaker 110 except for the design of the ferrule 216. The ferrule 216 has a first portion 218 that is substantially horizontal and substantially parallel to the basin plate 180 (see Figure 8B). A substantially rectangular opening 220 is provided in the first portion 218 through which the coil 132 can translate during operation of the speaker 210. The first portion 218 serves as a rim, and the periphery of the diaphragm 112 is typically attached to the rim by, for example, glue or adhesive. A second portion extends downwardly and substantially perpendicular to the side of the first portion 218 of the ferrule 216, the second portion being shown as a sidewall 222. The sidewall 222 extends around the perimeter of the ferrule 216. With continued reference to FIG. 8A, the sidewall 222 includes a plurality of openings 224 that extend through the sidewall 222 proximate the corners of the ferrule 216. The opening 224 is shown as a substantially circular aperture that is arranged in columns and rows. In various embodiments, for example, the opening 224 can be laser cut into the sidewall 222. The opening 224 serves as a side vent that permits air flow between a rear volume (not shown) of the diaphragm 112 and the rear volume side. As illustrated in Figure 8A, the gap between the opening 224 and the magnet 154 of the magnet system 150 is substantially aligned and thus the speaker 210 includes a substantially unobstructed air passage between the rear and rear volume sides of the diaphragm 112. Thus, opening 224 permits diaphragm 112 to vibrate without distortion in response to electrical signals fed into coil 132. In the case of the opening 224 containing the ferrule 216, the subsequent venting holes in the basin plate 180 are not required, as shown in Figure 8B. Since the venting holes on the basin plate 180 are not required, the geometry and/or features of the basin plate 180 can be simplified as compared to the basin plate 80 of prior art speakers, thereby reducing component cost. However, it will be appreciated that in various embodiments, a rear vent may be provided on the basin plate 180 in addition to or as an alternative to the openings in the ferrule 216. It will be appreciated that the number and/or size of the openings 224 can be varied to provide the appropriate side vents to a rear volume (not shown) to achieve the desired acoustic performance of the speaker 210. In addition, the opening 224 may have one of less than one of the adsorbent materials filled into one of the shells, as set forth in U.S. Provisional Application Serial No. 62/237,961, the disclosure of which is incorporated herein by reference. Maximum size, the application is incorporated by reference in its entirety. For example, the sorbent material can be a zeolitic material as described in U.S. Published Patent Application No. 2013/0170687, the entire disclosure of which is incorporated herein by reference. The ferrule 216 further includes a stabilizing tab 226 that extends substantially horizontally from the sidewall 222. As shown in FIG. 8A, the stabilizing tab 226 interfaces with the flexible printed circuit 136 for stabilizing the flexible printed circuit 136, providing protection for the electrical connection between the lead 134 and the contact pad 138, and stabilizing the ferrule 216 and The position of the coil assembly 130 in the speaker 210. Stabilizing tabs 226 are attached to flexible printed circuit 136 using an adhesive 142 (see Figure 3), such as glue, tape, or other adhesive known in the art. Another embodiment of the ferrule 316 of the present invention is illustrated in Figures 9A, 9B and hereinafter. Certain features of one or more of the ferrules 216 and 316 are common to each other and, therefore, the description of such features in one embodiment should be understood to apply to the other embodiments. In addition, the specific features and aspects of one embodiment may be used in combination with or in place of the specific features and aspects of the other embodiments. The ferrule 316 has a first portion 318 that is substantially horizontal and substantially parallel to a basin plate 180. A substantially rectangular opening 320 is provided in the first portion 318 through which a coil 132 can translate during operation of the speaker 110. The first portion 318 serves as a rim, and the periphery of a diaphragm 112 is typically attached to the rim by, for example, glue or adhesive. A second portion extends downwardly and substantially perpendicular to the side of the first portion 318 of the ferrule 316, which is shown as side wall 322. Side wall 322 extends around the periphery of ferrule 316. The sidewall 316 includes a plurality of openings 324 that extend through the sidewall 322 proximate the corner of the ferrule 316. Opening 324 is shown as a slot configured as a row. The slot opening 324 is shown extending from the terminal end of the sidewall 322 upwardly toward the first portion 318 of the ferrule 316. In various embodiments, for example, the opening 324 can be laser cut into the sidewall 322. The opening 324 serves as a side vent that permits air flow between a rear volume (not shown) of the diaphragm 112 and the rear volume side. The opening 324 can be substantially aligned with the gap between the magnets 154 of the magnet system 150, and thus a speaker can include a substantially unobstructed air passage between the rear and rear volume sides of the diaphragm 112. Thus, opening 324 permits diaphragm 112 to vibrate without distortion in response to electrical signals fed into coil 132. In the case of the opening 324 on the ferrule 316, the subsequent venting holes in the basin plate 180 are not required, as shown in Figure 8B. Since the venting holes on the basin plate 180 are not required, the geometry and/or features of the basin plate 180 can be simplified as compared to the basin plate 80 of prior art speakers, thereby reducing component cost. However, it will be appreciated that in various embodiments, a rear vent may be provided on the basin plate 180 in addition to or as an alternative to the openings in the ferrule 316. The ferrule 316 further includes a stabilizing tab 326 extending substantially horizontally from the sidewall 322. The stabilizing tab 326 performs the same function as the stabilizing tab 226 shown in Figure 8A. The stabilizing tab 326 interfaces with the flexible printed circuit 136 for stabilizing the flexible printed circuit 136 to provide protection for the electrical connection between the lead 134 and the contact pad 138, and the stabilizing ferrule 316 and the coil assembly 130 are in the speaker The location. Stabilizing tabs 326 are attached to flexible printed circuit 136 using an adhesive 142 (see Figure 3), such as glue, tape, or other adhesive known in the art. While the embodiment of the audio transducer is shown and illustrated as having a rectangular shape, it will be appreciated that in other embodiments, the audio transducer can have various shapes including, but not limited to, circular and oblong. Therefore, the present invention is not limited to an audio transducer having a rectangular shape. Further, it should be noted that the present invention is not limited to the above-mentioned embodiments and illustrative working examples. Further developments, modifications, and combinations are also within the scope of the patent application and those skilled in the art can understand the above disclosure. The technology and structures illustrated and described herein are to be understood as illustrative and illustrative and not limiting. The scope of the invention is defined by the scope of the appended claims, and the invention is intended to be While the invention has been described with respect to a particular embodiment of the present invention, it is to be understood by those skilled in the art that the various modifications of the disclosed embodiments can be made without departing from the spirit and scope of the invention. Finally, it should be noted that any patents, publications, or other disclosures that are hereby incorporated by reference herein in their entirety, in whole or in part The extent of this is incorporated herein. As such and to some extent necessary, the disclosure as explicitly set forth herein supersedes any conflicting material incorporated herein by reference. Any material or portion thereof that is hereby incorporated by reference but which is inconsistent with the present disclosure, the disclosure, Incorporate.

10‧‧‧Previous Technology Rectangular Micro Speaker/Speaker/Assembled Speaker/Rectangle Speaker/Previous Micro Speaker
12‧‧‧Separator
14‧‧‧diaphragm
32‧‧‧ coil
34‧‧‧Leader
50‧‧‧ Magnet system
52‧‧‧ Peripheral magnet assembly
54‧‧‧ magnet
58‧‧‧ ring plate
60‧‧‧Center magnet assembly
62‧‧‧ magnet
64‧‧‧ top board
68‧‧‧Guided magnetic field
70‧‧‧ air gap
80‧‧‧ basin plate
90‧‧‧Frame
92b‧‧‧Contact pads
92t‧‧‧Contact pads
94‧‧‧Flexible printed circuit
96‧‧‧Contact pads
98‧‧‧ bottom vent
110‧‧‧Rectangle Speaker/Assembled Speaker/Speaker/Micro Speaker
112‧‧‧Separator
114‧‧‧diaphragm plate
116‧‧‧Hoop
118‧‧‧Part 1
120‧‧‧Substantially rectangular opening
122‧‧‧Side tabs/protrusions/right tabs
124‧‧‧Select opening/opening
126‧‧‧Stabilized tabs/support tabs
130‧‧‧ coil assembly
132‧‧‧ coil
134‧‧‧ lead
136‧‧‧Flexible printed circuit/printed circuit
138‧‧‧Contact pads
140‧‧‧Contact pads
142‧‧‧Binder
150‧‧‧ Magnet System
152‧‧‧ Peripheral magnet assembly
154‧‧‧Magnet/Right Magnet
156‧‧‧ gap
158‧‧‧ring plate
160‧‧‧Center magnet assembly
162‧‧‧ magnet
164‧‧‧ top board
168‧‧‧Guided magnetic field
180‧‧‧ basin plate
190‧‧‧Enclosure
192‧‧‧ side loudspeakers
210‧‧‧Speakers
216‧‧‧Hoop
218‧‧‧Part 1
220‧‧‧Substantially rectangular opening
222‧‧‧ side wall
224‧‧‧ openings
226‧‧‧ Stable protrusions
316‧‧‧Hoop
318‧‧‧Part 1
320‧‧‧ Rectangular opening
322‧‧‧ side wall
324‧‧‧ openings/slot openings
326‧‧‧ Stable protrusions

These and other aspects, features, details, advantages and advantages of the present invention will become more fully apparent from the claims A number of features, and wherein: Figure 1 shows an exploded top perspective view of one of the related parts of a prior art rectangular microspeaker; Figure 2A shows a bottom perspective view of one of the related parts of a prior art rectangular microspeaker; Figure 2B shows a prior art rectangle FIG. 3 shows an exploded top perspective view of one of the rectangular microspeakers according to a first embodiment of the present invention; FIG. 4 shows a rectangular miniature according to a first embodiment of the present invention. a top perspective view of one of the coil assemblies of the speaker; FIG. 5 shows a top perspective view of one of the rectangular microspeakers according to the first embodiment of the present invention; FIG. 6 illustrates the manufacture of a rectangular miniature according to the first embodiment of the present invention. One of the flowcharts of one of the methods of the speaker; FIG. 7 is a rectangular shape of a housing in accordance with the first embodiment of the present invention. FIG. 8A is a top perspective view of one of the ferrules of one of the rectangular microspeakers according to a second embodiment of the present invention; FIG. 8B is a rectangular shape according to a second embodiment of the present invention. FIG. 9A is a bottom perspective view of one of the ferrules of one of the rectangular micro-speakers according to the third embodiment of the present invention; FIG. 9B is a rectangular micro-speaker according to a third embodiment of the present invention. One of the top perspectives of one of the ferrules. Similar component symbols refer to similar or equivalent parts in several views.

110‧‧‧Rectangle Speaker/Assembled Speaker/Speaker/Micro Speaker

112‧‧‧Separator

114‧‧‧diaphragm plate

116‧‧‧Hoop

118‧‧‧Part 1

120‧‧‧Substantially rectangular opening

122‧‧‧Side tabs/protrusions/right tabs

124‧‧‧Select opening/opening

126‧‧‧Stabilized tabs/support tabs

130‧‧‧ coil assembly

132‧‧‧ coil

134‧‧‧ lead

136‧‧‧Flexible printed circuit/printed circuit

138‧‧‧Contact pads

140‧‧‧Contact pads

142‧‧‧Binder

150‧‧‧ Magnet System

152‧‧‧ Peripheral magnet assembly

154‧‧‧Magnet/Right Magnet

156‧‧‧ gap

158‧‧‧ring plate

160‧‧‧Center magnet assembly

162‧‧‧ magnet

164‧‧‧ top board

168‧‧‧Guided magnetic field

180‧‧‧ basin plate

Claims (12)

An audio transducer comprising: a basin-shaped plate having a perimeter; a ferrule comprising: a first portion substantially parallel to the basin-shaped plate; a hole extending through the ferrule a first portion; and a second portion extending substantially vertically downward from the first portion; a diaphragm including a periphery attached to one of the first portions of the ferrule; a magnet system including One or more magnets on the basin plate and an air gap formed in the magnet system; and a coil assembly including: a coil located in the air gap, wherein the coil has attached to the diaphragm One of the top sides; and a pair of electrical leads extending from the coil, wherein the ferrule is mounted directly to the basin plate. The audio transducer of claim 1, wherein the ferrule and the basin plate are made of metal. The audio transducer of claim 2, wherein the ferrule is welded to the basin plate. The audio transducer of claim 1, wherein: the ferrule includes a support tab extending substantially perpendicularly outward from the second portion; and the coil assembly includes a flexible printed circuit having a pair of contact pads Each of the electrical leads is electrically connected to a respective contact pad, and wherein the support tab of the ferrule is attached to the flexible printed circuit. The audio transducer of claim 1, wherein the ferrule, the diaphragm, and the basin plate are substantially rectangular. An audio transducer comprising: a basin-shaped plate having a perimeter; a ferrule comprising: a first portion substantially parallel to the basin-shaped plate; a hole extending through the ferrule The first portion; and a second portion extending substantially vertically downward from the first portion; a diaphragm including a periphery attached to one of the first portions of the ferrule; a magnet system comprising: a peripheral magnet assembly comprising a plurality of outer magnets disposed adjacent to the periphery of the basin plate and an annular plate attached to the plurality of outer magnets; and an air gap formed in the magnet system; and a coil An assembly comprising: a coil positioned in the air gap, wherein the coil has a top side attached to one of the diaphragms; and a pair of electrical leads extending from the coil, wherein the ferrule is mounted directly to the Ring plate. The audio transducer of claim 6, wherein the ferrule and the annular plate are made of metal. The audio transducer of claim 7, wherein the ferrule is welded to the annular plate. The audio transducer of claim 6, wherein the ferrule, the diaphragm, the basin plate, and the annular plate are substantially rectangular. The audio transducer of claim 6, wherein the ferrule is also mounted directly to the basin plate. The audio transducer of claim 10, wherein the ferrule, the basin plate, and the annular plate are made of metal. The audio transducer of claim 11, wherein the ferrule is welded to the basin plate and the annular plate.