Patent Publication Number: US-10764688-B2

Title: Speaker

Description:
TECHNICAL FIELD 
     The present disclosure relates to the field of acoustic-electrical conversion, and in particular, to a speaker used in portable electronic products. 
     BACKGROUND 
     With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among the numerous mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, functions of the mobile phones are extremely diverse, one of which is high-quality music. Therefore, speakers for playing sound are widely used in today&#39;s smart mobile devices. 
     In the related art, the speaker includes a holder, and a magnetic circuit unit, a vibration unit, a flexible printed circuit board and a conductive terminal that are received in the holder. The vibration unit is electrically connected to the flexible printed circuit board, and the flexible printed circuit board is electrically connected to an external circuit via the conductive terminal. In the speaker of this structure, the conductive terminal generally adopts a metal spring or a metal dome embedded in the holder, so that a larger occupancy space is required, which does not meet the miniaturization requirements of the speaker. 
     Therefore, it is necessary to provide a new speaker to solve the above 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 disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is a perspective structural schematic diagram of a speaker provided by the present disclosure; 
         FIG. 2  is an exploded structural schematic diagram of a speaker provided by the present disclosure; 
         FIG. 3  is a perspective structural schematic diagram of a yoke shown in  FIG. 2  when being viewed from another perspective; 
         FIG. 4  is a cross-sectional diagram of the speaker shown in  FIG. 1  taken along line A-A; 
         FIG. 5  is a cross-sectional diagram of the speaker shown in  FIG. 1  taken along line B-B; 
         FIG. 6  is an enlarged diagram of the Portion C shown in  FIG. 5 ; 
         FIG. 7  schematically illustrates a connection relationship between the yoke and a circuit board shown in  FIG. 2 ; and 
         FIG. 8  is a perspective structural schematic diagram of the speaker shown in  FIG. 1  when being viewed from another perspective. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The present disclosure will be further illustrated with reference to the accompanying drawings and the embodiments. 
     Referring to  FIG. 1  and  FIG. 2  in conjunction, the present disclosure provides a speaker  100  including a holder  1  having a receiving space, a vibration unit  2  received in the receiving space, a magnetic circuit unit  3  used for driving the vibration unit  2  to vibrate and emit sound, an electrical connection member  4  fixed at the holder  1  and used for supporting the vibration unit  2 , and a printed circuit board  5  connected to the electrical connection member  4  and used for achieving electrical connection between the electrical connection member  4  and an external circuit. 
     The holder  1  has a rectangular frame shape and is configured to receive and protect other components of the speaker  100 . As an example, the holder  1  is a metal holder of relatively high strength and includes a frame body  11  enclosing the receiving space and support edges  12  provided at an end of the frame body  11  facing away from the vibration unit  2  and connected to the frame body  11 . 
     The support edges  12  form an opening. Specifically, the support edges  12  include two first side edges  121  arranged opposite to each other and two second side edges  122  arranged opposite to each other. The first side edges  121  and the second side edges  122  are connected, head to tail, to form the opening. 
     The vibration unit  2  is used to vibrate and emit sound. Specifically, the vibration unit  2  includes a diaphragm  21  used to vibrate and emit sound and a voice coil  22  disposed on a side of the diaphragm  21 . The diaphragm  21  is fixedly connected to the frame body  1 , and the voice coil  22  is used to drive the diaphragm  21  to vibrate and emit sound. 
     The magnetic circuit unit  3  is used to drive the vibration unit  2  to vibrate and emit sound. Specifically, the magnetic circuit unit  3  includes a yoke  31  fixedly connected to the holder  1 , a magnet  32  assembled to the yoke  31 , and a pole plate  33  adhered to a surface of the magnet  32 . 
     Referring to  FIG. 3 , in the present embodiment, the yoke  31  has a bowl-like structure, and includes a bottom plate  311  exposed out of the holder  1 , side plates  312  extending from the bottom plate  311  while being bent towards the diaphragm  21 , and a recess  313  provided at a side of the bottom plate  311  facing away from the diaphragm  21 . The bottom plate  311  and the side plates  312  cooperate to form a receiving space. The magnet  33  is received in the receiving space, and the side plates  312  form a magnetic gap with the magnet  32 . The voice coil  22  is suspended in the magnetic gap. 
     The bottom plate  311  is exposed via the opening, and includes an upper surface  3111  close to the diaphragm  21  and a lower surface  3112  arranged opposite to the upper surface  3111 . The recess  313  is formed by recessing from the lower surface  3112  towards the upper surface  3111 . 
     Further, the recess  313  includes a first recess  3131  provided in parallel with the first side edge  121  and a second recess  3132  provided in parallel with the second side edge  122 . The first recess  3131  and the second recess  3132  are in communication. 
     Further, the first recess  3131  and the second recess  3132  have the same structures, each including a recess bottom wall opposite to the upper surface  3111  and a recess sidewall extending from the recess bottom wall along a direction facing away from the upper surface  3111 . 
     Referring to  FIG. 2  and  FIG. 4  in conjunction, the electrical connection member  4  is fixedly connected to the holder  1  and elastically supports the voice coil  22 . Further, the electrical connection member  4  is electrically connected to the voice coil  22 . 
     Specifically, the electrical connection member  4  includes a body portion  41  that elastically supports the voice coil  22 , an elastic arm  42  extending from the body portion  41 , and a fitting portion  43  extending from the elastic arm  42  to out of the holder  1 . The elastic arm  42  extends from two opposite ends of the body portion  41  towards an opposite side. The elastic arm  42  and the body portion  41  form a ring shape, and the fitting portion  43  is formed at a middle portion of the elastic arm  42 . 
     The body portion  41 , in one aspect, supports the voice coil  22 , and is, in another aspect, electrically connected to the voice coil  22  for transmitting an external electric signal to the voice coil  22 . 
     Specifically, the body portion  41  includes a support plate  411  facing right towards the diaphragm  21 , an inner baffle  412  extending from a side of the support plate  411  facing away from the elastic arm  42  while being bent towards the diaphragm  21 , and an outer baffle  413  extending from a side of the support plate  411  close to the elastic arm  42  while being bent towards the diaphragm  21 . The support plate  411  has a ring shape, and the voice coil  22  is sandwiched between the inner baffle  412  and the outer baffle  413 . It can be understood that the inner baffle  412  and the outer baffle  413  limit a position of the voice coil  22 , thereby increasing stability of the connection between the voice coil  22  and the electrical connection member  4 . 
     The fitting portion  43  includes an extension portion  431  extending from the elastic arm  42  along a direction facing away from the receiving space, a connecting portion  432  that is bent and extends from a distal end of the extension portion  431  along a direction facing away from the diaphragm  21 , and a pad  433  that is bent and extends from an end of the connecting portion  432  facing away from the extension portion  431 . The pad  433  is arranged opposite to the extension portion  431 . The support edge  12  is sandwiched between the pad  433  and the extension portion  431 . It can be understood that the pad  433  is provided at an end of the electrical connection member  4  facing away from the voice coil  22  and fixedly connected to the holder  1 . 
     The pad  433  is exposed at the support edge  12 . Specifically, there are two pads  433  respectively exposed at the first side edges  121 . The recess bottom wall of the first recess  3111 /the second recess  3132  is coplanar with the pad  433 , and the pad  433  is provided at an end of the second recess  3132  facing away from the first recess  3131 . 
     The extension portion  431 , the connecting portion  432  and the pad  433  together form a buckle structure having a U-shaped cross section. By providing the buckle structure, the connection strength between the electrical connection member  4  and the holder  1  is increased. By providing the pad  433 , the electrical connection member  4  can be directly connected to an external electrical device without additionally providing an external pad, thereby saving the internal space of the speaker  100 . 
     Referring to  FIG. 5  and  FIG. 6 , the printed circuit board  5  is connected to the electrical connection member  4  and used to achieve electrical connection between the electrical connection member  4  and an external circuit. Specifically, the printed circuit board  5  is received in the recess  313  and extends to the pad  433 . The printed circuit board  5  matches the recess and is fixedly connected to the recess  313 , and a thickness of the printed circuit board  5  is smaller than or equal to a depth of the recess  313 . It can be understood that the printed circuit board  5  will not go beyond the lower surface  3112  of the yoke  31 , such that the space can be reasonably utilized, and thus a smaller height of the finished product of the speaker  100  can be obtained, thereby meeting the demand for miniaturization. 
     Referring to  FIG. 7  and  FIG. 8 , the printed circuit board  5  has a “T” structure, and includes a first portion  51  having two ends connected to the two pads  433  respectively, a second portion  52  arranged opposite to the first portion  51 , and a third portion  53  connecting the first portion  51  with the second portion  52 . The first portion  51  is correspondingly received in the second recess  3132 , and the third portion  53  is correspondingly received in the first recess  3131 . The second portion  52  extends from the third portion  53  to out of the speaker  100  for electrical connection with an external circuit. 
     As an example, the first portion  51  and the pad  433  are fixedly connected by hot-pressing solder-melting welding, such that the connection is firm and the number of flexible plate connectors can be reduced, thereby saving cost. 
     Compared with the related art, by providing a recess  313  at the lower surface  3111  of the yoke  31 , receiving the printed circuit board  5  in the recess  313  and using the printed circuit board  5  for electrical connection between the electrical connection member  4  and an external circuit, the speaker  100  provided by the present disclosure can achieve reasonable utilization of space and obtain a smaller height of the finished product of the speaker  100 , thereby meeting the demand for miniaturization. 
     What has been described above is only an embodiment of the present disclosure, and it should be noted herein that one ordinary person skilled in the art can make improvements without departing from the inventive concept of the present disclosure, but these are all within the scope of the present disclosure.