Patent Publication Number: US-10764686-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 rapid development of technologies, audio devices become more and more popular, and among numerous recreation modes, high-quality music enjoyment is gradually popularized. Thus, speakers for playing audio have been greatly applied to existing smart mobile devices. 
     The speaker in the related art includes a holder and a vibration unit and a magnetic circuit unit that are received in the holder. The vibration unit includes a diaphragm, a voice coil located below the diaphragm and used for driving the diaphragm to vibrate and emit sound, and a flexible printed circuit board located below the voice coil. 
     However, in the speaker in the related art, it is often necessary to additionally design an external pad structure for connecting the flexible printed circuit board with an external electrical device, which wastes the internal space of the speaker while increasing the difficulty in designing the internal structure of the speaker. Furthermore, the flexible printed circuit board and the holder are fixed only by glue, so that the connection of the flexible printed circuit board is not stable enough. 
     Therefore, it is necessary to provide a new speaker to overcome the above drawbacks. 
    
    
     
       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 of the present disclosure; 
         FIG. 2  is an exploded perspective structural schematic diagram of the speaker shown in  FIG. 1 ; 
         FIG. 3  is an enlarged diagram of a region A of the speaker shown in  FIG. 2 ; 
         FIG. 4  is a partial perspective structural schematic diagram of a speaker of the present disclosure; 
         FIG. 5  is an exploded perspective structural schematic diagram of the speaker shown in  FIG. 4 ; and 
         FIG. 6  is an enlarged diagram of a region B of the speaker shown in  FIG. 5 . 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The present disclosure will be further illustrated with reference to the accompanying drawings and the embodiments. 
     Referring to  FIG. 1  to  FIG. 6  in conjunction, the speaker  100  includes a vibration unit  1 , a magnetic circuit unit  3 , a holder  5  for receiving the vibration unit  1  and the magnetic circuit unit  3 , and a bayonet portion  7  penetrating through the holder  5 . 
     The vibration unit  1  includes a diaphragm  11 , a voice coil  13  located at a side of the diaphragm  11  and driving the diaphragm  11  to vibrate and emit sound, and a flexible printed circuit board  15  located at a side of the voice coil  13  facing away from the diaphragm and connected to the voice coil  13 . 
     The flexible printed circuit board  15  includes a body portion  151  that supports the voice coil  13 , an extension portion  153  extending from the body portion  151  towards the bayonet portion  7  and passing through the bayonet portion  7 , and a connecting portion  155  that is bent and extends from a distal end of the extension portion  153  along an outer side of the holder  5 . The connecting portion  155  is fitted to the outer side of the holder  5  and used for electrical connection with an external circuit. 
     The body portion  151 , in one aspect, supports the voice coil  13 , and in another aspect, is electrically connected to the voice coil  13  for transmitting an external electrical signal to the voice coil  13 . Specifically, the body portion  151  includes a fixing portion  1511  that is fixedly connected to the voice coil  13  and has a ring shape, an elastic arm  1513  spaced apart from the fixing portion  1511 , and extension arms  1515  respectively extending from the elastic arm  1513  towards the fixing portion  1511  along two opposite ends at a side of the voice coil  13 . The elastic arm  1513 , the extension arms  1515  and the fixing portion  1511  form a ring. The connecting portion  155  is formed at the elastic arm  1513 . 
     The fixing portion  1511  includes a support plate  1517  facing right towards the diaphragm  11 , an inner side-plate  1518  extending from a side of the support plate  1517  facing away from the elastic arm  1513  while being bent towards the diaphragm  11 , and an outer side-plate  1519  extending from a side of the support plate  1517  close to the elastic arm  1513  while being bent towards the diaphragm  11 . The support plate  1517  has a ring shape, and the voice coil  13  is sandwiched between the inner side-plate  1518  and the outer side-plate  1519 . 
     Specifically, the outer side-plate is provided with an avoiding notch corresponding to the extension wall  1515 . 
     The extension portion  153  and the connecting portion  155  together enclose a buckle structure having a U-shaped cross section, and the connection strength between the flexible printed circuit board  15  and the holder  5  is increased by providing the buckle structure. Moreover, by providing the connecting portion  155 , the flexible printed circuit board  15  can be directly connected to an external electrical device without providing an external pad additionally, thereby saving internal space of the speaker  100 . 
     The connecting portion  155  is formed a middle position of the elastic arm  1513 . Specifically, the connecting portion  155  includes a transition portion  1551  extending along the outer side of the holder  5  towards the direction facing away from the diaphragm  11 , and a pad portion  1553  that is bent and extends from an end of the transition portion  1551  facing away from the body portion  151  along the surface of the holder  5  facing away from the diaphragm  11 . The pad portion  1553  is arranged opposite to the extension portion  153  and fixedly connected to the surface of the holder  5  facing away from the diaphragm  11 . 
     The pad portion  1553  is used for connection with an external circuit. 
     The magnetic circuit unit  3  includes a yoke  31  provided at an end of the holder  5  facing away from the diaphragm  11 , a magnet  33  assembled in the center of the yoke  31 , and a pole plate  35  assembled above the magnet  33 . 
     The holder  5  may be a metal holder. The holder  5  includes a frame body  51  connected to the diaphragm  11 , a support edge  53  provided at an end of the frame body  51  facing away from the diaphragm  11  and connected to the frame body  51 , and a recessed portion  55  formed by recessing from a surface of the frame body  51  facing away from the diaphragm  11  towards the diaphragm  11 . The support edge  53  and the recessed portion  55  cooperate to form the bayonet portion  7 . 
     In this embodiment, the frame body  51  and the support edge  53  are separately formed. Of course, this is not a limitation to the present disclosure. In other embodiments, the frame body  51  and the support edge  53  may also be integrally formed. 
     The frame body  51  includes two first sidewalls  511  arranged opposite to each other and two second sidewalls  513  arranged opposite to each other. The two first sidewalls  511  and the two second sidewalls  513  are connected end to end to form a rectangular frame shape. A length of the first sidewall  511  is greater than that of the second sidewall  513 . In this embodiment, the recessed portion  55  is provided at a middle position of the first sidewall  511 . 
     The support edge  53  includes two first support edges  531  respectively connected to the two first sidewalls  511  and two second support edges  533  respectively connected to the two second sidewalls  513 . The first support edge  531  is fixedly connected to the elastic arm  1513  and the extension arm  1515  by glue. Moreover, the first support edge  531  is buckled in a buckle structure enclosed by the extension portion  153  and the connecting portion  155 , so as to enhance stability of the connection between the flexible printed circuit board  15  and the holder  5 . 
     Specifically, the first support edge  531  includes a lower surface facing away from the diaphragm  11 , an upper surface arranged opposite to the lower surface, and a side surface connecting the upper surface with the lower surface. The extension portion  153  is connected to the upper surface. The transition portion  1551  is connected to the side surface, and the pad portion  1553  is connected to the lower surface. 
     It should be noted that, in the speaker  100  provided by the present disclosure, the number of the bayonet portions  7  is not limited but can be set according to actual needs. In the present embodiment, the number of the bayonet portions  7  is two. Correspondingly, the number of the recessed portions  55  is also two, and these two recessed portions are respectively provided one the two first sidewalls  511 . The two recessed portions  55  and the two first support edges  531  are assembled to form the two bayonet portions  7 . Moreover, correspondingly, the number of the extension portions  153  and the number of the connecting portions  155  are also two. 
     Compared with the related art, by providing the extension portion  153  and the connecting portion  155  on the flexible printed circuit board  15  in such a manner that the extension portion  153  and the connecting portion  155  together enclose a buckle structure having a U-shaped cross section, the speaker  100  provided by the present disclosure strengthens the fixing connection between the flexible printed circuit board  15  and the holder  5 , and the stability of the speaker  100  is increased. Moreover, the pad portion  1553  connected to the voice coil  13  via the transition portion  1551 , the extension portion  153  and the body portion  151  is provided, so that the voice coil  13  can be directly connected to an external electrical device via the flexible printed circuit board  15  without providing an external pad additionally, thereby saving internal space of the speaker  100 . 
     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.