Patent Publication Number: US-11026025-B2

Title: Speaker

Description:
TECHNICAL FIELD 
     The present invention relates to the technical field of electroacoustic conversion technologies, and particularly, to a speaker. 
     BACKGROUND 
     With the advent of the mobile internet era, various smart mobile devices continuously emerge. Among the various mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, mobile phones have extremely diverse functions, one of which is high-quality music displaying. Therefore, speakers for playing sound are widely used in smart mobile devices nowadays. 
     In the related art, a speaker includes a holder, a diaphragm fixed to the holder, a magnetic circuit unit fixed to the holder, a voice coil configured to drive the diaphragm to vibrate, and a centering support plate communicating the voice coil with the outside of the holder. The centering support plate is provided with a pad configured to weld a lead wire of the voice coil. However, the pad is often suspended and unfixed, which may result in damage to the tone quality of the speaker and noise generation. 
     In view of the above, it is urgent to provide a new speaker to solve the above technical problems. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       Many aspects of the exemplary embodiment can be better understood with reference to the following drawings. The components in the drawings 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 a perspective view of a speaker according to an embodiment of the present invention; 
         FIG. 2  is an exploded view of the speaker shown in  FIG. 1 ; 
         FIG. 3  is a cross-sectional view of the speaker taken along line A-A shown in  FIG. 1 ; and 
         FIG. 4  is a perspective assembled view for a dome and a centering support plate shown in  FIG. 2 . 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The present invention will hereinafter be described in detail with reference to several exemplary embodiments. 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 figure and the embodiments. It should be understood the specific embodiments described hereby is only to explain the invention, not intended to limit the invention. 
     As shown in  FIG. 1  to  FIG. 3 , the present invention provides a speaker  100 . The speaker  100  includes a holder  1 , a vibration unit  2 , and a magnetic circuit unit  3 . The vibration unit  2  and the magnetic circuit unit  3  are received in the holder  1 . The holder  1  is made of plastic. The magnetic circuit unit  3  is configured to generate a constant magnetic field. The vibration unit  2  receives an external electric signal, so as to interact with the constant magnetic field generated by the magnetic circuit unit  3  and generate an electromagnetic force. Further, the vibration unit  2  is driven by the electromagnetic force to vibrate and emit sound. 
     The vibration unit  2  includes a diaphragm  21 , a voice coil  22 , centering support plates  23 , voice membranes  24 , and a support frame  25 . The voice coil  22  is configured to drive the diaphragm  21  to vibrate and emit sound. One end of the centering support plate  23  is fixed to the holder  1 , and the other end thereof is fixed to the voice coil  22 . The voice membrane  24  is fixedly connected to the centering support plate  23 . 
     The centering support plate  23  is fixed to an end of the voice coil  22  facing away from the diaphragm  21 . The end of the centering support plate  23  fixed to the voice coil  22  is provided with a pad  231  electrically connected to the voice coil  22 . Each centering support plate  23  include two pads  231 , and the two pads  231  are symmetrically arranged with respect to a long axis direction of the voice coil  22 . The centering support plate  23  includes a fixing portion  232  fixed to the holder  1 , an elastic arm  233  extending from the fixing portion  232  while being bent towards the voice coil, and the pad  231  connected to an end of the elastic arm  233  facing away from the fixing portion  232 . The end of the elastic arm  233  facing away from the fixing portion  232  is supported on a side of the voice coil  22  facing away from the diaphragm  21 . 
     The voice membrane  24  is recessed towards a direction facing away from the elastic arm  233  along a vibrating direction of the diaphragm  21 . 
     As shown in  FIG. 3  to  FIG. 4 , the diaphragm  21  includes a central portion  211 , a suspension portion  212  surrounding the central portion  211 , and a dome  213  fixed to a side of the central portion  211  close to the voice coil  22 . The dome  213  includes a body  2131  attached to the central portion  211 , and a connection portion  2132  extending from an edge of the body  2131  towards the pad  231  and fixedly connected to the pad  231 . In an embodiment, the connection portion  2132  is arranged correspondingly to a corner of the voice coil  22 . 
     The connection portion  2132  includes an extension arm  2134  extending from an edge of the body  2131  towards the pad  231 , and a positioning portion  2135  extending from the extension arm  2134  while being bent and fixed to the pad  231 . The extension arm  2134  extends along an outer side of the voice coil  22  and is attached to the voice coil  22 . A positioning hole  2136  is formed by penetrating the positioning portion  2135 . The pad  231  is partially exposed to the interior of the speaker  100  through the positioning hole  2136 . 
     The magnetic circuit unit  3  includes a main magnet  31 , auxiliary magnets  32 , edge magnets  33 , a main pole plate  34 , auxiliary pole plates  35 , and a yoke  36 . The main magnet  31  is arranged correspondingly to the central portion  211 . An end of the voice coil  22  facing away from the diaphragm  21  is disposed on and surrounds an outer circumference of the main magnet  31 . The auxiliary magnets  32  are fixed between the voice membrane  24  and the main magnet  31 . The voice coil  22  is of a racetrack type. The auxiliary magnets  32  are symmetrically arranged at two ends of the voice coil  22  along a long axis direction thereof. The edge magnets  33  are fixed to two ends of the voice coil  22  along a short axis direction thereof. Each edge magnet  33  and each auxiliary magnet  32  are spaced apart from the main magnet  31 . The main pole plate  34  and the auxiliary pole plates  35  are attached to upper surfaces of the main magnet  31  and the auxiliary magnets  32 , respectively. The main magnet  31  and the auxiliary magnets  32  are fixed to the yoke  36 . In an embodiment, the magnetic circuit unit  3  further includes a magnetic conductive plate  30  embedded in the holder. The magnetic conductive plate  30  covers a side of the edge magnet  33  facing away from the yoke  36 . 
     The pad  231  extends from the elastic arm  233  towards a direction facing away from the main magnet  31 . 
     The dome  213  further includes an extension portion  2133  extending from an edge of the body  2131  and located between the suspension portion  212  and the auxiliary magnet  32 . The vibration unit  2  further includes a support frame  25  sandwiched between the voice membrane  24  and the extension portion  2133 . A side of the voice membrane  24  facing away from the fixing portion  232  is fixed to the support frame  25 . The auxiliary magnet  32  is located between the support frame  25  and the voice coil  22 . 
     The speaker  100  further includes a dustproof member  4  fixed under the holder  1 . Two dustproof members  4  are provided, and the dustproof members  4  are respectively located at two ends of the holder  1  along the long axis direction. 
     The speaker provided by the present invention has the following beneficial effects. With the connection portion extending from the edge of the dome towards the pad and fixedly connected to the pad, the pad of the centering support plate can be fixed, preventing the tone quality of the speaker from being be damaged by the pad, and reducing noise. 
     The above described embodiments are merely intended to illustrate the present invention, and it should be noted that, without departing from the inventive concept of the present invention, the improvements made by those skilled in the related art shall fall within the protection scope of the present invention.