Patent Publication Number: US-2023145438-A1

Title: Multifunctional Electromagnetic Transducer

Description:
FIELD OF THE PRESENT INVENTION 
     The present invention relates to an electromagnetic transducer, and more particularly, to a multifunctional electromagnetic transducer. 
     DESCRIPTION OF RELATED ART 
     The speaker in the related art can only produce sound by driving the voice diaphragm, and the speaker can&#39;t achieve a high performance of bass effect due to the insufficient driving force. 
     Furthermore, the vibration feedback and the voice feedback of the electronic device are respectively completed by different devices, which is not conducive to the reduction of the volume of the electronic device. Even a multifunctional sounding device that integrates different functions requires a long time for vibration response, and the user experience is not good. 
     Therefore, it is desired to provide a new multifunctional electromagnetic transducer which can overcome the above problems. 
     SUMMARY 
     In view of the above, the embodiment of the present invention provides a new multifunctional electromagnetic transducer. By the present invention, the multifunctional electromagnetic transducer can achieve a better bass performance. 
     The present invention provides A multifunctional electromagnetic transducer, including: a housing providing with an accommodation space; a speaker received in the accommodation space, the speaker including: a first vibration system with a voice diaphragm, and a first magnetic circuit system fixed to the housing driving the voice diaphragm to vibrate along a first direction and generate sounds; a vibrator received in the accommodation space driving the multifunctional electromagnetic transducer to vibrate along a second direction, the vibrator including: a second vibration system with a vibration diaphragm, and a second magnetic circuit system flexible suspending on the housing driving the voice diaphragm to vibrate; wherein the voice diaphragm, the voice diaphragm and a housing enclosed a rear chamber. 
     Further, wherein the first magnetic circuit system includes a first magnetic gap while the first vibration system includes a first coil located in the magnet gap; a connection support connecting the diaphragm and the first coil, and an elastic diaphragm flexible supporting the first coil. 
     Further, wherein the connection support includes a first bending portion, a connection portion bending and extending from the first bending portion along the first direction and, a second bending portion bending and extending from the connection portion along a direction perpendicular to the first direction. 
     Further, wherein the vibrator further includes a flexible support fixed to the housing, while the second magnets circuit system is flexible suspend on the housing by the flexible support. 
     Further, wherein the second magnetic circuit system further includes a second magnetic assembly and a second lower plate supporting the second magnetic assembly, the second lower plate includes a main portion supporting the second magnetic assembly and a extending portion bending and extending from the main portion to the flexible support, wherein the extending portion is fixed to the flexible support. 
     Further, wherein the flexible support includes a fixing portion fixed to the housing and a flexible arm flexible connecting to the fixing portion which is fixed to the extending portion. 
     Further, wherein the extending portion includes a third bending portion extending from both ends of the main portion to the flexible support and, a fourth bending portion extending from the third bending portion which is fixed to the flexible arm. 
     Further, wherein the first magnetic circuit includes a first main magnet and a plurality of auxiliary magnets arranged on the both sides of the first main magnet, the first main magnet spaced apart from the first main magnet for forming the first magnetic gap, the first magnetic circuit further includes a first upper plate, a second lower plate and a first magnetic assembly sandwiched between the first upper plate and the second lower plate. 
     Further, wherein the first direction forms an angle against the second direction. 
     Further, wherein the angle is 0° or 90°. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The exemplary embodiment can be better understood with reference to the following drawing. The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present invention. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG.  1    is an illustrative isometric view of a multifunctional electromagnetic transducer in accordance with the present invention. 
         FIG.  2    is an illustrative cross-sectional view of the multifunctional electromagnetic transducer taken along line A-A of  FIG.  1   . 
         FIG.  3    is an illustrative isometric view of a speaker of the multifunctional electromagnetic transducer in the  FIG.  1   . 
         FIG.  4    is an illustrative isometric view of a vibrator of the multifunctional electromagnetic transducer in the  FIG.  1   . 
         FIG.  5    is an exploded view of the multifunctional electromagnetic transducer in the  FIG.  1   . 
         FIG.  6    is an illustrative isometric view of a second lower plate of the multifunctional electromagnetic transducer in the  FIG.  1   . 
     
    
    
     DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENT 
     The present invention will hereinafter be described in detail with reference to exemplary embodiment. To make the technical problems to be solved, technical solutions and beneficial effects of the present invention more apparent, the present invention is described in further detail together with the figures and the embodiments. It should be understood the specific embodiments described hereby is only to explain the disclosure, not intended to limit the disclosure. 
     Referring to the  FIGS.  1 - 5   , the present invention provides one embodiment of a multifunctional electromagnetic transducer. The multifunctional electromagnetic transducer enables generating both sound and vibration. The multifunctional electromagnetic transducer includes a speaker  100 , vibrator  200  and a housing  300  with an accommodation space. The speaker  100  and the vibrator  200   
     Providing with a sound port  111  and a speaker  20  fixed with the housing  10 . The speaker  20  is received in the housing  10 . The speaker  20  includes a frame  21 , a vibration system  22  supported on the frame  21 , and a magnetic circuit system  23  supported on the frame  21 . The magnetic circuit system  23  drives the vibration system  22  to vibrate along a first direction and generate sounds. The first direction is a direction indicated by arrow x in  FIG.  2   . The housing  10  and the frame  21  cooperatively form an accommodating cavity  101  for receiving the vibration system  22  and magnetic circuit system  23 . The multifunctional electromagnetic transducer  100  further includes a flexible support  30  disposed on a side of the magnetic circuit system  23  distal to the vibration system  22  and secured to the housing  10 . The magnetic circuit system  23  is fixed with the flexible support  30  is suspended in the accommodating cavity  101  by the flexible support  30 , and the magnetic circuit system  23  moves along the first direction. The first direction is the sounding direction of the speaker  20 . 
     In some embodiments, the multifunctional electromagnetic transducer  100  has a rectangular structure. And in other embodiments, the multifunctional electromagnetic transducer can also be set to a cube or other three-dimensional structures, and it can be adjusted according to different usage environments. 
     The magnetic circuit system  23  comprises a yoke  231  and a magnet assembly  232  mounted on the yoke  231 . The yoke  231  comprising a main portion  2311  supporting the magnet assembly  232  and an extension portion  2312  bending and extending from the main portion  2311  to the flexible support  30  and secured to the flexible support  30 . The magnetic circuit system  23  is fixed with the flexible support  30  through the extension portion  2312 . While the magnetic circuit system  23  drives the vibration system  22  to vibrate along the first direction, the magnetic circuit system  23  can also vibrate along a vibration direction of the vibration system  22  under the support of the flexible support  30 , thereby obtaining a stronger motor driving force and resistance. Both the starting time and the braking time are greatly shortened to achieve a better vibration experience. 
     It should be noted that the multifunctional electromagnetic transducer can have different functions due to the different passing currents. In one working condition, the multifunctional electromagnetic transducer can be used as a loudspeaker to realize the function of sound when passing in high-frequency current, and in another working condition, the multifunctional electromagnetic transducer can be used as a vibration motor when passing in low-frequency current. Under the support of the flexible support  30 , the starting time and the braking time of the vibration motor are greatly shortened to achieve a better vibration experience. 
     The housing  10  comprises an upper cover  11  mounted on a side of the frame  21 , a middle cover  12  mounted on an opposite side of the frame  21 , and a lower cover  13  fixed on a side of the middle cover  12  distal to the upper cover  11 . The upper cover  11  is a hollow structure, and the sound port  111  is disposed on the upper cover  11 . The sound inside of the housing  10  is transmitted to the outside of the housing  10  through the sound port  111 . Specifically, a cross section of the sound port  111  may be in a rectangular or a circular shape, or may be in other shapes according to different usage environments. The middle cover  12  is a tubular structure. The lower cover  13  is a lid-shaped structure with an opening on one side thereof. Optionally, the cross section of the middle cover  12  is rectangular annular shaped. In other different usage environments, the shape of the cross section of the middle cover  12  also can be in other structures. 
     The flexible support  30  comprises a fixing portion  31  sandwiched between the middle cover  12  and the lower cover  13  and an elastic portion  32  extending from the fixing portion  31  into the accommodating cavity  101 . The elastic portion  32  connects with the extension portion  2312  of the yoke  231 . 
     In some embodiments, optionally, each of two ends of the main portion  2311  respectively extends to form the extension portion  2312  along a second direction perpendicular to the first direction. The first direction is a direction indicated by arrow x, and the second direction is a direction indicated by arrow y in  FIG.  2   . The flexible support  30  has two elastic portions  32  corresponding to the extension portions  2312 . The extension portion  2312  and the corresponding elastic portion  32  are fixed in one-to-one, so that the flexible support  30  supports the magnetic circuit system  23  more stably. Specifically, two elastic portions  32  are respectively formed on two opposite sides of the flexible support  30  by bending and extending to an inner side of the accommodating cavity  101 . The two elastic portions  32  are arranged spaced apart from each other. The elastic portion  32  is a hollow bending structure, so that the elastic portion  32  has a good elastic performance. 
     In some embodiments, the extension portion  2312  comprises a first extension portion  2312   a  bending and extending from the main portion  2311  to a direction of the flexible support  30  and a second extension portion  2312   b  bending and extending from the first extension portion  2312   a  and fixing to the elastic portion  32 . More specifically, the second extension portion  2312   b  is in the shape of a flat plate, and is fixed to the elastic portion  32 , so that the magnetic circuit system  23  can obtain a stable support even under a large-amplitude vibration. 
     In some embodiments, an outer surface of the housing  10  is level with an outer surface of the frame  21 , so that the multifunctional electromagnetic transducer  100  has better integration, and the outer shape of the multifunctional electromagnetic transducer  100  is more regular, which is beneficial to mount the multifunctional electromagnetic transducer  100  with other members or electronic products. It is also convenient to transport and store the multifunctional electromagnetic transducer  100 . 
     In some optional embodiments, an end of the middle cover  12  proximal to the lower cover  13  turns over into the accommodating cavity  101  to form a flange  121 , and the fixing portion  31  is fixedly connected between the flange  121  and the lower cover  13 . The flange  121  and the fixing portion  31  are both with an annular shape. so that the flexible support  30  can be more firmly fixed to the housing  1 . 
     Referring to the  FIGS.  3 - 5   , in some embodiments, the vibration system  22  comprises a diaphragm  221  secured to the frame  21 , an elastic assembly  24  spaced apart from the diaphragm  221  and mounted between the frame  21  and the middle cover  12 , a connection support  25  connecting the diaphragm  221  and the elastic assembly  24 , and a voice coil  26  fixing with the connection support  25 . The magnetic circuit system  23  comprises a main magnet  233  and a plurality of auxiliary magnets  234 . The auxiliary magnets  234  are arranged at two ends of the main magnet  233  and spaced apart from the main magnet  233  for forming a magnetic gap  230 . The voice coil  26  at least partially locates in the magnetic gap  230 . 
     The connection support  25  comprises a first bending portion  251  secured to the diaphragm  221 , a second bending portion  252  bending and extending from the first bending portion  251  to the elastic assembly  24 , and a third bending portion  253  bending and extending from the second bending portion  252  and secured to the elastic assembly  24 . The voice coil  26  is fixed to a side of the third bending portion  253  away from the elastic assembly  24 . In some embodiments, the first bending portion  251  is a flat sheet structure, the second bending portion  252  is an arc-shaped column structure bending from two sides to a middle part thereof, and the third bending portion  253  is a slot-like structure with an arc structure. 
     Comparing with the related art, the multifunctional electromagnetic transducer of present invention includes a housing providing with a sound port and a speaker fixed with the housing. The speaker includes a frame forming an accommodating cavity cooperatively with the housing, a vibration system supported on the frame and received in the accommodating cavity; and a magnetic circuit system received in the accommodating cavity driving the vibration system to vibrate along a first direction and generate sounds. The multifunctional electromagnetic transducer further includes a flexible support disposed on a side of the magnetic circuit system distal to the vibration system and secured to the housing. The magnetic circuit system is suspended in the accommodating cavity by the flexible support and moves along the first direction. In present invention, by setting the flexible support on the side of the magnetic circuit system away from the vibration system and fixing the flexible support to the housing, and the magnetic circuit system is suspended and fixed in the accommodating cavity through the flexible support, while the magnetic circuit system drives the vibration system to vibrate, the magnetic circuit system can also vibrate along the vibration direction of the vibration system, so that the multifunctional electromagnetic transducer of the present invention can provide stronger motor driving force and resistance, and both the starting time and the braking time are greatly shortened to achieve a better vibration experience. 
     It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiment have been set forth in the foregoing description, together with details of the structures and functions of the embodiment, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed.