Patent Publication Number: US-2019182600-A1

Title: Speaker assembly and electronic device using same

Description:
FIELD 
     The present disclosure relates to audio production. 
     BACKGROUND 
     Mobile phones, personal digital assistants, tablets, laptops, and the like have built-in speaker assemblys that act as sound sources. With the improvement of playback quality of electronic devices, vibrations of audio playback can affect the normal operation of other electronic components inside the electronic devices. In limited space, most of the speaker assemblys are only tweeters without bass speaker assemblies, which may lead to sharp high-pitched and broken sounds and result in poor sound quality playback of the speaker assemblies. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the present disclosure can be better understood with reference to the drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the views. 
         FIG. 1  is a functional block diagram of an embodiment of an electronic device. 
         FIG. 2  is a schematic view of an embodiment of a speaker assembly of the electronic device of  FIG. 1 . 
         FIG. 3  is a disassembled view of the speaker assembly of  FIG. 2 . 
         FIG. 4  is a schematic view of one speaker assembly. 
         FIG. 5  is a disassembled view of the speaker assembly of  FIG. 4 . 
         FIG. 6  is a disassembled view of a left channel speaker. 
     
    
    
     DETAILED DESCRIPTION 
     It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiment described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. Further, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure. 
     The term “comprising” means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series, and the like. 
     Embodiments of the present disclosure will be described in relation to the accompanying drawings. 
     With reference to  FIG. 1 , an electronic device  200  includes a speaker assembly  100  and a driving unit  300 . The driving unit  300  is configured to drive the speaker assembly  100 . The electronic device  200  can be a mobile phone, a personal digital assistant, a tablet, a laptop or other electronic device having a sound outputting function. The electronic device  200  can further include, but is not limited to, other mechanical structures, electronic components, modules, and stored software. 
     With reference to  FIG. 2  and  FIG. 3 , an embodiment of a speaker assembly  100  is installed in the electronic device  200 . The speaker assembly  100  can include, but is not limited to, at least one speaker sub-assembly. In the embodiment, the speaker assembly  100  includes two speaker sub-assemblies defined as a left speaker assembly  101  and a right speaker assembly  103 . 
     The speaker assembly  100  includes a sound chamber  10 , a speaker  20 , and a diaphragm  30 . Each speaker sub-assembly includes a sound chamber, a speaker, and a diaphragm. 
     In the embodiment, the left speaker assembly  101  includes a left sound chamber  11 , a left speaker  41 , and a left diaphragm  51 . The right speaker assembly  103  has an exactly same structure, and includes a right sound chamber  12 , a right speaker  42 , and a right diaphragm  52 . 
     The left speaker  41  is set at one end of the left sound chamber  11  and the right speaker  42  is set at one end of the right sound chamber  12 . The end of the left sound chamber  11  and the end of the right sound chamber  12 ) are far away from each other. The other ends of each of the left and right sound chambers  11  and the right sound chamber  12  are together and fitted to each other to form the sound chamber  10 . The left diaphragm  51  is set at one side of left sound chamber  11  and the right diaphragm  52  is set at one side of the right sound chamber  12 . The left diaphragms  51  and the right diaphragm  52  are on the same side of the electronic device  200 . The left sound chamber  11 , the left speaker  41 , and the left diaphragm  51  form a closed sound cavity. The right sound chamber  12 , the right speaker  42 , and the right diaphragm  52  form another closed sound cavity. The left speaker  41  and the right speaker  42  can each further include, but not be limited to, other mechanical structures, electronic components, modules, and stored software. 
     The left sound chamber  11  and the right sound chamber  12  are separated from each other. Each of the left sound chamber  11  and the right sound chamber  12  are substantially cylindrical. The left sound chamber  11  and the right sound chamber  12  each has a first end disposed near each other. The two first ends are independent of each other and are closed. The left sound chamber  11  and the right sound chamber  12  each has a second end which is opposite to a corresponding first end. The second ends each is a concave structure, and is concaved towards the corresponding first end. The second end forms a first opening  13  therein. The first openings  13  of the left sound chamber  11  and the right sound chamber  12  are configured to receive the left speaker  41  and the right speaker  42 . 
     A description of only the left sound chamber  11 , the left speaker  41 , and the left diaphragm  51  needs to be given as examples for both the left sound chamber  11  and the right sound chamber  12 . 
     With reference to  FIG. 6 , the left speaker  41  includes a drum paper  22 , a support portion  23 , and a voice coil  24 . The left speaker  41  is received in the first opening  13  of the left sound chamber  11 . In the present embodiment, the left speaker  41  can be a high-frequency loudspeaker assembly. In other embodiment, the left speaker  41  can be an alto speaker and a bass speaker. The drum paper  22  is received in the second opening  25 . The drum paper  22  is a trumpet-shaped structure. The drum paper  22  defines a third opening  14  therein. The third opening  14  is configured to receive a dust cap  26 , and the dust cap  26  prevents the ingress of dust and other contaminants. The third opening  14  is an oval structure. 
     In the present embodiment, the support portion  23  has a threaded connection with the left sound chamber  11 . In other embodiment, the connecting of the support portion  23  with the left sound chamber  11  can be achieved by a clamped or other connection. The support portion  23  is configured to secure the drum paper  22 . A bottom of the voice coil  24  is secured to an end of second opening  14  of drum paper  22 . In the present embodiment, the left speaker  41  can further include other mechanical and electronic elements. 
     The left diaphragm  51  is positioned at one side of the left sound chamber  11 . The left sound chamber  11  defines a recess  32 , the recess  32  is a rectangular structure. The recess  32  defines a fourth opening  33 . The fourth opening  33  is an oval structure. The fourth opening  33  has a shape and size approximately the same as that of the diaphragm  30 . The fourth opening  33  is configured to receive the diaphragm  30 . 
     In the present embodiment, when the left speaker  41  receives an electrical audio signal alternating electric current passes through the coil on the left speaker  41  and electromagnetic induction produces sound as the drum paper  22  is vibrated. 
     The drum paper  22  vibrates the air in the closed space of the sound chamber but such air acts as a damper. This reduces the high frequencies of the left speaker  41  to a mid-bass pitch or tone. At the same time, the left diaphragm  51  can vibrate as the air in the closed space of the rear cavity is compressed or stretched due to the vibration of drum paper  22 , and these vibrations of the diaphragm  51  convert the mid-bass pitch to a lower bass frequency or pitch. 
     The embodiments shown and described above are only examples. Many details are often found in the art such as the other features of a speaker assembly. Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set fourth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, especially in matters of shape, size, and arrangement of the parts within the principles of the present disclosure, up to and including the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the embodiments described above may be modified within the scope of the claims.