Patent Publication Number: US-11659334-B2

Title: Acoustic device

Description:
FIELD OF THE PRESENT INVENTION 
     The present invention relates to electro-acoustic transducers, and more particularly, to an acoustic device used in electronic speaker box products. 
     DESCRIPTION OF RELATED ART 
     Whit the rapid development of wireless communication technologies, mobile phone and other consumer electronic products are widely used. The acoustic devices are also known as speakers or horns, and are often used in these products. Specifically, they are used in speaker boxes to convert electrical signals into sound for playback. 
     In related art, the acoustic device usually includes a frame, a magnetic circuit system having a magnetic gap, and a vibration system supported on the frame. The magnetic circuit system drives the vibration system to generate sounds. The vibration system usually includes a membrane fixed on the frame, a dome attached to the membrane, a voice coil located in the magnetic gap, and a support connecting the dome and the voice coil. 
     However, in acoustic device of the related art, the dome and the support are usually with a flat structure, and which resulting insufficient strength of the dome and the support, so that the frequency band of the acoustic device is narrow and the sound effect is not good. 
     Therefore, it is desired to provide a new acoustic device which can overcome the above problems. 
     SUMMARY 
     In view of the above, the embodiment of the present invention provides a new acoustic device. By the present invention, the acoustic device has a better performance. 
     The present invention provides an acoustic device including a frame, a magnetic circuit system having a magnetic gap, a vibration system supported on the frame. The vibration system comprises a diaphragm, a voice coil at least partially located in the magnetic gap and driving the diaphragm to generate sounds, and a support connecting with the diaphragm and the voice coil. The diaphragm comprises an annular dome, an annular first suspension, and an annular second suspension. The first suspension surrounds and spaces apart from the second suspension. The dome locates between and connects with the first and second suspension. The diaphragm further comprises a first fixation portion bending and extending from a side of the first suspension proximal to the second suspension. The dome comprises an annular dome body and a first dome extending wall bending and extending from the dome body along a direction toward the magnetic circuit system. The first fixation portion connects to and wraps the first dome extending wall. 
     As an improvement, the support comprises a support flat wall, a first support extending wall, and a second support extending wall, the support flat wall is attached to a surface of the dome body proximal to the voice coil, the first support extending wall bends and extends from a side of the support flat wall proximal to the first suspension along the direction toward the magnetic circuit system, the first support extending wall is arranged spaced apart from and opposite to the first dome extending wall, the second support extending wall extends from a side of the support flat wall proximal to the second suspension along the direction toward the voice coil and is fixed to the voice coil. 
     As an improvement, the first fixation portion comprises a first holding wall bending and extending from a side of the first suspension proximal to the second suspension, a first side wall bending and extending from a side of the first holding wall proximal to the first suspension along a vibration direction toward the magnetic circuit system, a first top wall bending and extending from the first side wall along the direction away from the first suspension, and a second side wall bending and extending from the first top wall along the vibration direction away from the magnetic circuit system, the first side wall, the first top wall, and the second side wall cooperatively enclose a first receiving slot for accommodating the first dome extending wall, an outer peripheral of the dome body is attached to a surface of the first holding wall proximal to the magnetic circuit system. 
     As an improvement, the first support extending wall is arranged spaced apart from the second side wall. 
     As an improvement, the first dome extending wall is formed by extending from the dome body along the vibration direction of the diaphragm, the first support extending wall is formed by extending from the side of the support flat wall proximal to the first suspension along the vibration direction. 
     As an improvement, the diaphragm further comprises a second fixation portion bending and extending from a side of the second suspension closed to the first suspension, the dome comprises a second dome extending wall bending and extending from a side of the dome body distal to the first dome extending wall to the direction toward the magnetic circuit system, the second fixation portion connects to and wraps the second dome extending wall. 
     As an improvement, the second fixation portion comprises a second holding wall and a third side wall bending and extending from a side of the second suspension closed to the first suspension, the second holding portion is arranged spaced apart from the third side wall and cooperatively encloses a second receiving slot with the third side wall, the second dome extending wall is received in the second receiving slot, an inner peripheral of the dome body is attached to the surface of the second holding wall proximal to the voice coil. 
     As an improvement, both of the first suspension and the second suspension are in arc-shaped structures, each of the first suspension and the second suspension has a recess direction, and the two recess directions are in opposite directions. 
     As an improvement, the recess direction of the first suspension is a direction proximal to the voice coil, and the recess direction of the second suspension is a direction distal to the voice coil. 
     As an improvement, the diaphragm further comprises a third fixation portion bending and extending from a side of the first suspension distal to the second suspension, the third fixation portion is mounted to an inner peripheral of the frame. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of 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 an acoustic device in accordance with one embodiment of the present invention. 
         FIG.  2    is an illustrative cross-sectional view of the acoustic device taken along line II-II of  FIG.  1   . 
         FIG.  3    is an enlarged view of the acoustic device of circled part A of  FIG.  2   . 
         FIG.  4    is a partially isometric view of partly members of the acoustic device of the present invention. 
         FIG.  5    is an exploded view of partly members of the acoustic device of  FIG.  4   . 
     
    
    
     DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENT 
     The present invention will hereinafter be described in detail with reference to an 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 embodiment. It should be understood the specific embodiment 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 an acoustic device  100 . The acoustic device  100  includes a frame  1 , a vibration system  2 , a magnetic circuit system  3  having a magnetic gap  30 , a front cover  4  receiving the magnetic circuit system  3  and fixed to the frame  1 , and a back cover  5  fixed on a side of the frame  1  distal to the front cover  4 . The vibration system  2  is supported on the frame  1 , and the magnetic circuit system  3  is supported on the front cover  4 . The magnetic circuit system  3  drives the vibration system  2  to generate sounds. 
     In present embodiment, the vibration system  2  includes a diaphragm  21 , a voice coil  22  at least partially located in the magnetic gap  30  and driving the diaphragm  21  to generate sounds, and a support  23  connecting with the diaphragm  21  and the voice coil  22 . 
     The diaphragm  21  includes an annular dome  211 , an annular first suspension  212 , and an annular second suspension  213 . The first suspension  212  surrounds and is arranged spaced apart from the second suspension  213 . The dome  21  locates between and connecting to the first and second suspension. The diaphragm  21  further includes a first fixation portion  214  bending and extending from a side of the first suspension  212  proximal to the second suspension  213 , a second fixation portion  214  bending and extending from a side of the second suspension  213  closed to the first suspension  212 , and a third fixation portion  216  bending and extending from a side of the first suspension  212  distal to the second suspension  213 . The third fixation portion  216  is mounted to an inner peripheral of the frame  1 . The dome  211  includes an annular dome body  2111  and a first dome extending wall  2112  bending and extending from the dome body  2111  along a direction toward the magnetic circuit system  3 . The first fixation portion  214  connects to and wraps the first dome extending wall  2112 . 
     Both of the first suspension  212  and the second suspension  213  are in arc-shaped structures, and each of the first suspension  212  and the second suspension  213  has a recess direction, and the two recess directions are in opposite directions. Specifically, the recess direction of the first suspension  212  is a direction proximal to the voice coil  22 , and the recess direction of the second suspension  213  is a direction distal to the voice coil  22 . 
     The support  23  comprises a support flat wall  231 , a first support extending wall  232 , and a second support extending wall  233 . The support flat wall  231  is attached to a surface of the dome body  2111  proximal to the voice coil  22 . The first support extending wall  232  bends and extends from a side of the support flat wall  231  proximal to the first suspension  212  along the direction toward the magnetic circuit system  3 . The first support extending wall  232  is arranged spaced apart from and opposite to the first dome extending wall  2112 . The second support extending wall  233  extends from a side of the support flat wall  231  proximal to the second suspension  213  along the direction toward the voice coil  22  and is fixed to the voice coil  22 . 
     Furthermore, the first dome extending wall  2112  is formed by extending from the dome body  2111  along the vibration direction of the diaphragm  21 , and the first support extending wall  232  is formed by extending from the side of the support flat wall  231  proximal to the first suspension  212  along the vibration direction. 
     And furthermore, in order to enhance the strength of the connection between the dome  211  and the first fixation portion  214 , the first fixation portion  214  comprises a first holding wall  2141  bending and extending from a side of the first suspension  212  proximal to the second suspension  213 , a first side wall  2142  bending and extending from a side of the first holding wall  2141  proximal to the first suspension  212  along a vibration direction toward the magnetic circuit system  3 , a first top wall  2143  bending and extending from the first side wall  2142  along the direction away from the first suspension  212 , and a second side wall  2144  bending and extending from the first top wall  2143  along the vibration direction away from the magnetic circuit system  3 . The first side wall  2142 , the first top wall  2143 , and the second side wall  2144  cooperatively enclose a first receiving slot  2145  for accommodating the first dome extending wall  2112 . An outer peripheral of the dome body  2111  is attached to a surface of the first holding wall  2141  proximal to the magnetic circuit system  3 . 
     The first support extending wall  232  is arranged spaced apart from the second side wall  2144 . In other words, the first support extending wall  232  is arranged spaced apart from the first dome extending wall  2112 . A gap is existed between the first support extending wall  232  and the first dome extending wall  2112 . 
     In present embodiment, the dome  211  comprises a second dome extending wall  2113  bending and extending from a side of the dome body  2111  distal to the first dome extending wall  2112  to the direction toward the magnetic circuit system  3 . There may be a certain angle between the bending direction of the second dome extending wall  2113  and the vibrating direction of the diaphragm  21 . That is, the second dome extending wall  2113  can extend not along the vibration direction. The second fixation portion  215  connects to and wraps the second dome extending wall  2113 . 
     In detail, the second fixation portion  215  comprises a second holding wall  2151  and a third side wall  2152  bending and extending from a side of the second suspension  213  closed to the first suspension  212 . The second holding portion  2151  is arranged spaced apart from the third side wall  2152  and cooperatively encloses a second receiving slot  2153  with the third side wall  2152 . The second dome extending wall  2113  is received in the second receiving slot  2153 . An inner peripheral of the dome body  2111  is attached to the surface of the second holding wall  2151  proximal to the voice coil. Therefore, the outer peripheral of the dome body  2111  is located on the first holding wall  2141 , and the inner peripheral of the dome body  2111  is located on the second holding wall  2151 , which not only can improve the reliability of the connection of the dome body  2111 , the first fixation portion  214  and the second fixing portion  215 , but also can enhance the strength of the connection position. 
     Comparing with the related art, in the acoustic device of present invention, the acoustic device includes a frame, a vibration system supported on the frame, a magnetic circuit system having a magnetic gap. The vibration system comprises a diaphragm, a voice coil at least partially located in the magnetic gap and driving the diaphragm to generate sounds, and a support connecting with the diaphragm and the voice coil. The diaphragm comprises an annular dome, an annular first suspension, and an annular second suspension, the first suspension surrounding and spaced apart from the second suspension. The dome locates between and connects with the first and second suspension. The diaphragm further comprises a first fixation portion bending and extending from a side of the first suspension proximal to the second suspension. The dome comprises an annular dome body and a first dome extending wall bending and extending from the dome body along a direction toward the magnetic circuit system. The first fixation portion connects to and wraps the first dome extending wall. Therefore, by setting the first dome extending wall of the dome extending toward the magnetic circuit system, it is beneficial to enhance the strength of the vibration system, and to a certain extent, it can to improve the impact of the split vibration on the performance, and it expands and improves the high frequency of the acoustic device. 
     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.