Patent Publication Number: US-11641550-B2

Title: Speaker

Description:
TECHNICAL FIELD 
     The present disclosure relates to the field of electro-acoustic conversion, in particular to a speaker for an electronic audio product. 
     BACKGROUND 
     With the advent of the Internet era, the number of smart mobile devices continues to rise. Among the innumerous mobile devices, mobile phones are undoubtedly the most common and most portable mobile terminal devices. At present, mobile phones have extremely diverse functions, one of which is a high-quality music function. Therefore, speakers for playing music are widely used in today&#39;s smart mobile devices. 
     In the related art, a speaker includes a frame, a vibration unit fixed to the frame and a magnetic circuit unit driving the vibration unit to vibrate and produce sound. The vibration unit includes a diaphragm fixed to the frame. An outer peripheral side of the diaphragm is fixed to the frame, and an inner peripheral side of the diaphragm is fixed to the magnetic circuit unit. The diaphragm includes a ring-shaped first suspension, a ring-shaped second suspension and a ring-shaped vibrating portion. The first suspension surrounds the second suspension and is spaced apart from the second suspension. An outer peripheral side of the vibrating portion is fixed to a side of the first suspension close to the second suspension, and an inner peripheral side of the vibrating portion is fixed to a side of the second suspension close to the first suspension. An outer peripheral side of the first suspension is fixed to the frame. One end of a holder is fixed to a first diaphragm, and another end of the holder is fixed to a voice coil. The magnetic circuit unit includes a yoke fixed to the frame, a main magnet fixed to the yoke, an auxiliary magnet surrounding the main magnet, and a subsidiary magnet covering a side of the main magnet away from the yoke. The inner peripheral side of the diaphragm is fixed to the subsidiary magnet, and the second suspension surrounds the subsidiary magnet. 
     In order to connect the second suspension to the subsidiary magnet, generally, a connecting member connecting the second suspension and the subsidiary magnet is provided at an outer peripheral side of the subsidiary magnet. However, due to the connecting member, the width of the second suspension is limited, resulting in a small effective vibration area of the second suspension. As a result, the speaker unit has low sensitivity and poor acoustic performance. Therefore, it needs to provide a speaker to solve the above technical problem. 
     SUMMARY 
     An objective of the present disclosure is to provide a speaker with desirable acoustic performance. 
     An embodiment of the present disclosure provides a speaker, including a frame; a vibration unit fixed to the frame; and a magnetic circuit unit driving the vibration unit to vibrate and produce sound. The vibration unit includes a diaphragm having a ring shape and a voice coil driving the diaphragm to vibrate and produce sound; the diaphragm includes a first suspension having a ring shape, a second suspension having a ring shape and a vibrating portion having a ring shape; the first suspension surrounds the second suspension and is spaced apart from the second suspension; an outer peripheral side of the vibrating portion is fixed to a side of the first suspension close to the second suspension, and an inner peripheral side of the vibrating portion is fixed to a side of the second suspension close to the first suspension; an outer peripheral side of the first suspension is fixed to the frame; the magnetic circuit unit is provided with a magnetic gap, and the voice coil is inserted in the magnetic gap; the magnetic circuit unit includes a yoke; and the yoke and the diaphragm are arranged at two opposite sides of the frame; and the vibration unit further includes a fixing ring connected to the magnetic circuit unit; the second suspension surrounds the fixing ring; and an inner peripheral side of the second suspension is fixed to an end of the fixing ring away from the yoke. 
     As an improvement, the magnetic circuit unit includes a main magnet fixed to the yoke, an auxiliary magnet surrounding the main magnet, and a subsidiary magnet fixed to and covering a side of the main magnet away from the yoke; the auxiliary magnet is spaced apart from the main magnet to form the magnetic gap; and the fixing ring is sleeved outside the subsidiary magnet and is fixed to and connected to the subsidiary magnet. 
     As an improvement, the subsidiary magnet includes a subsidiary magnet body fixed to a side of the main magnet away from the yoke, and a subsidiary magnet extension portion formed by the subsidiary magnet body protruding away from the yoke; and the fixing ring is sleeved outside the subsidiary magnet extension portion and is fixed to and connected to the subsidiary magnet body. 
     As an improvement, the second suspension includes a second suspension portion having a ring shape, a second fixing portion extending from an outer peripheral side of the second suspension portion toward the vibrating portion, a third fixing portion extending from an inner peripheral side of the second suspension portion toward the fixing ring, and a fourth fixing portion extending from the third fixing portion toward the yoke; the second fixing portion is connected to the vibrating portion; the third fixing portion is fixed to an end of the fixing ring away from the yoke; and the fourth fixing portion is attached to an outer side of the fixing ring. 
     As an improvement, the fixing ring includes a fixing ring body having a ring shape, and a fixing ring reinforcing portion bending and extending from an end of the fixing ring body away from the yoke toward the subsidiary magnet extension portion; an outer side of the fixing ring body is fixed to the fourth fixing portion; and an end of the fixing ring reinforcing portion away from the yoke is fixed to the third fixing portion. 
     As an improvement, the vibration unit further includes a holder; the holder includes holder body having a ring shape and a first holder fixing portion bending and extending from an inner peripheral side of the holder body toward the voice coil; the holder body is located between the first suspension and the second suspension, and is respectively connected to an inner peripheral side of the first suspension and the outer peripheral side of the second suspension to serve as the vibrating portion; the first holder fixing portion is fixed to an end of the voice coil away from the yoke; and an outer side of the second fixing portion is fixed to a side of the first holder fixing portion close to the subsidiary magnet body. 
     As an improvement, the vibration unit further includes a dome having a ring shape; the dome is sandwiched between the first suspension and the second suspension; the dome is spaced apart from the first suspension and the second suspension; and the dome is fixed to a side of the holder body away from the yoke. 
     As an improvement, the holder further includes a second holder fixing portion bending and extending from an outer peripheral side of the holder body in a direction away from the first suspension; the vibration unit further includes an elastic support assembly surrounding the magnetic circuit unit and spaced apart from the magnetic circuit unit; and a side of the elastic support assembly away from the magnetic circuit unit is fixed to the frame, and a side of the elastic support assembly close to the magnetic circuit unit is fixed to the second holder fixing portion. 
     As an improvement, the magnetic circuit unit further includes a main pole plate fixedly sandwiched between the main magnet and the subsidiary magnet body, and an auxiliary pole plate fixed to an end of the auxiliary magnet away from the yoke; the auxiliary pole plate includes an auxiliary pole plate body that is ring-shaped and fixed to the auxiliary magnet, and an auxiliary pole plate fixing portion extending from the auxiliary pole plate body toward the frame; and the auxiliary pole plate fixing portion is fixed to the frame. 
     As an improvement, the fixing ring is a metal ring. 
     Compared with the related art, in the present disclosure, the fixing ring is connected to the magnetic circuit unit, and the inner peripheral side of the second suspension is fixed to an end of the fixing ring away from the yoke. With this structure, a bonding surface of the inner peripheral side of the second suspension and the fixing ring is located at the top of the fixing ring, such that the outer peripheral side of the second suspension can extend to the position of the fixing ring. Thus, the width of the second suspension is maximized, and it is beneficial to make the second suspension and the fixing ring integrated. The assembly of the diaphragm is simplified, and the effective vibration area of the second suspension is increased. In this way, the sensitivity of the speaker is improved, thereby improving the acoustic performance of the speaker. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       To describe the technical solutions in the embodiments of the present disclosure more clearly, the drawings required for describing the embodiments are briefly described below. Apparently, the drawings in the following description show merely some embodiments of the present disclosure, and those of ordinary skill in the art may still derive other drawings from these drawings without creative efforts. 
         FIG.  1    is a three-dimensional view illustrating a structure of a speaker according to an embodiment of the present disclosure; 
         FIG.  2    is a partial three-dimensional exploded view illustrating a structure of a speaker according to an embodiment of the present disclosure; 
         FIG.  3    is a sectional view taken along line A-A shown in  FIG.  1   ; 
         FIG.  4    is an enlarged view of B shown in  FIG.  3   ; and 
         FIG.  5    is a three-dimensional view illustrating a structure of a second suspension and a fixing ring of a speaker according to an embodiment of the present disclosure, after assembly. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     The technical solutions of the embodiments of the present disclosure are described in detail below with reference to the drawings. Apparently, the described embodiments are merely some rather than all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts should fall within the protection scope of the present disclosure. 
     Referring to  FIG.  1    to  FIG.  5   , an embodiment of the present disclosure provides a speaker  100 . The speaker  100  includes a frame  1 , a vibration unit  2  fixed to the frame  1 , a magnetic circuit unit  3  for driving the vibration unit  2  to vibrate and produce sound and a fixing ring  4 . The magnetic circuit unit  3  is provided with a magnetic gap  30  and a yoke  31  located on a side of the frame  1 . 
     The frame  1  is ring-shaped. 
     The vibration unit  2  includes a diaphragm  21 , a voice coil  22 , a holder  23 , elastic support assemblies  24  and a fixing ring  25 . 
     The diaphragm  21  includes a ring-shaped first suspension  211 , a ring-shaped second suspension  212  and a ring-shaped vibrating portion  213  that are spaced apart from each other. The first suspension  211  surrounds the second suspension  212  and is spaced apart from the second suspension  211 . An outer peripheral side of the vibrating portion  213  is fixed to a side of the first suspension  211  close to the second suspension  212 , and an inner peripheral side of the vibrating portion  213  is fixed to a side of the second suspension  212  close to the first suspension  211 . An outer peripheral side of the first suspension  211  is fixed to the frame  1 . 
     The first suspension  211  is ring-shaped and surrounds the magnetic circuit unit  3 . Specifically, the first suspension  211  includes a ring-shaped first suspension portion  2111 , a first vibrating portion  2112  bending and extending from an inner peripheral side of the first suspension portion  2111  toward the second suspension  212 , and a first fixing portion  2113  bending and extending from an outer peripheral side of the first suspension portion  2111  toward the frame  1 . The first fixing portion  2113  is fixed to the frame  1 . A cross section of the first suspension portion  2111  has an arc shape. 
     In this implementation, the first suspension  211  further includes a ring-shaped first reinforcing portion  2114  bending and extending from an outer periphery of the first fixing portion  2113  along an outer peripheral side of the frame  1 . The first reinforcing portion  2114  is fixed to the frame  1 . The first reinforcing portion  2114  increases the bonding area of the first suspension  211  and the frame  1 , thereby improving the reliability of the speaker  100 . 
     The second suspension  212  is ring-shaped. The first suspension  211  surrounds the second suspension  212  and is spaced apart from the second suspension  212 . An outer peripheral side of the second suspension  212  is fixed to the inner peripheral side of the vibrating portion  213 , and an inner peripheral side of the second suspension  212  is fixed to the magnetic circuit unit  3 . 
     Specifically, the second suspension  212  includes a second suspension portion  2121 , a second fixing portion  2122 , a third fixing portion  2123  and a fourth fixing portion  2124 . 
     The second suspension portion  2121  is ring-shaped. A cross section of the second suspension portion  2121  has an arc shape. 
     The second fixing portion  2122  extends from an outer peripheral side of the second suspension portion  2121  toward the vibrating portion  213 . The second fixing portion  2122  is connected to the vibrating portion  213 . Specifically, the second fixing portion  2122  is fixed to the inner peripheral side of the vibrating portion  213 . In this implementation, the vibrating portion  213  is fixed to the second fixing portion  2122  by gluing. 
     The third fixing portion  2123  extends from an inner peripheral side of the second suspension portion  2121  toward the magnetic circuit unit  3 . The third fixing portion  2123  is fixed to the magnetic circuit unit  3 . 
     The fourth fixing portion  2124  extends from the third fixing portion  2123  toward the yoke  31 . The fourth fixing portion  2124  is configured to strengthen the fixing of the magnetic circuit unit  3 . 
     The voice coil  22  is configured to drive the diaphragm  21  to vibrate and produce sound. The voice coil  22  is inserted in the magnetic gap  30 . 
     One end of the holder  23  is fixed to the diaphragm  21 , and another end of the holder  23  is fixed to the voice coil  22 . 
     Specifically, the holder  23  includes a holder body  231 , a first holder fixing portion  232  and second holder fixing portions  233 . 
     The holder body  231  is ring-shaped. The holder body  231  is located between the first suspension  211  and the second suspension  212 , and is respectively connected to an inner peripheral side of the first suspension  211  and an outer peripheral side of the second suspension  212  to serve as the vibrating portion  213 . The first vibrating portion  2112  is fixed to a side of the holder body  231  away from the yoke  31 . The first vibrating portion  2112  and the holder body  231  are integrated to achieve desirable acoustic performance of the diaphragm  21  and also prevent separation from occurring during vibration. 
     In this implementation, the vibration unit  2  further includes a ring-shaped dome  26 . The dome  26  is sandwiched between the first suspension  211  and the second suspension  212 . The dome  26  is spaced apart from the first suspension  211  and the second suspension  212 . The dome  26  is fixed to a side of the holder body  231  away from the yoke  31 . With this structure, the dome  26 , the first vibrating portion  2112  and the holder body  231  are integrated to achieve desirable acoustic performance of the diaphragm  21  and also prevent separation from occurring during vibration. 
     The first holder fixing portion  232  bends and extends from an inner peripheral side of the holder body  231  toward the voice coil  22 . The first holder fixing portion  232  is spaced apart from the magnetic circuit unit  3 . The first holder fixing portion  232  is fixed to an end of the voice coil  22  away from the yoke  31 , such that the voice coil  22  drives the diaphragm  21  to vibrate and produce sound through the first holder fixing portion  232  and the holder body  231 . 
     The second holder fixing portions  233  bend and extend from an outer peripheral side of the holder body  231  in a direction away from the first suspension  211 . The second holder fixing portions  233  are configured to fix the elastic support assemblies  24 . 
     The elastic support assemblies  24  are spaced apart from and opposite to the diaphragm  21 . Specifically, sides of the elastic support assemblies  24  away from the magnetic circuit unit  3  are fixed to the frame  1 , and sides of the elastic support assemblies  24  close to the magnetic circuit unit  3  are fixed to the second holder fixing portions  233 . With this structure, the elastic support assemblies  24  balance the vibration of the voice coil  22 . 
     In this implementation, the voice coil  22  has a rectangular structure, and two elastic support assemblies  24  are provided. The two elastic support assemblies  24  are located at two opposite sides of the voice coil  22 . With this structure, the elastic support assemblies  24  stably support the voice coil  22  to ensure vibration reliability, thereby improving the acoustic performance of the diaphragm  21 . 
     The fixing ring  25  is ring-shaped. The third fixing portion  2123  bends and extends from the inner peripheral side of the second suspension portion  2121  toward the fixing ring  25 . The second suspension  212  surrounds the fixing ring  25 . 
     The second suspension  212  is fixed to the fixing ring  25 . The inner peripheral side of the second suspension  212  is fixed to an end of the fixing ring  25  away from the yoke  31 . The third fixing portion  2123  is fixed to the end of the fixing ring  25  away from the yoke  31 . The fourth fixing portion  2124  is attached to an outer side of the fixing ring  25 . With this structure, a bonding surface of the second suspension  212  and the fixing ring  25  is located at the top of the fixing ring  25 , such that the outer peripheral side of the second suspension  212  can extend to the position of the fixing ring  25 . Thus, the width of the second suspension  212  is maximized, and it is beneficial to make the second suspension  212  and the fixing ring  25  be integrated. In this way, the assembly of the diaphragm  21  is simplified, and the effective vibration area of the second suspension  212  is increased. Therefore, the sensitivity of the speaker  100  is improved, thereby improving the acoustic performance of the speaker  100 . 
     In an embodiment, the side of the third fixing portion  2123  away from the second suspension portion  2121  is aligned with the side of the fixing ring  25  away from the second suspension portion  2121 . This structure facilitates assembly, improves the vibration performance of the diaphragm  21 , and maximizes the effective vibration area of the second suspension  212 . Therefore, the sensitivity of the speaker  100  is improved, thereby improving the acoustic performance of the speaker  100 . 
     In this implementation, the fixing ring  25  includes a ring-shaped fixing ring body  251 , and a fixing ring reinforcing portion  252  bending and extending from an end of the fixing ring body  251  away from the yoke  31  in a direction toward a subsidiary magnet extension portion  342 . An outer side of the fixing ring body  251  is fixed to the fourth fixing portion  2124 , and an end of the fixing ring reinforcing portion  252  away from the yoke  31  is fixed to the third fixing portion  2123 . This structure makes the fourth fixing portion  2124  more firmly fixed to the fixing ring  25 , thereby improving the reliability of the speaker  100 . The second suspension  212  and the fixing ring  25  can be simply assembled and integrated, and the effective vibration area of the second suspension  212  can be maximized. In this way, the sensitivity of the speaker  100  is improved, thereby improving the acoustic performance of the speaker  100 . 
     The fixing ring  25  is a metal ring. The fixing ring  25  is made of a metal material with a greater hardness than that of the diaphragm  21 , and the fixing ring  25  is configured to fix the diaphragm  21  to the magnetic circuit unit  3 . 
     In this implementation, the fixing ring  25  is a steel ring, which achieves a simple structure and is easy to assemble. 
     The magnetic circuit unit  3  includes a yoke  31 , a main magnet  32 , an auxiliary magnet  33 , a subsidiary magnet  34 , a main pole plate  35  and an auxiliary pole plate  36 . 
     The yoke  31  and the diaphragm  21  are arranged at two opposite sides of the frame  1 . 
     The main magnet  32  is fixed to the yoke  31 . 
     The auxiliary magnet  33  is fixed to the yoke  31 . The auxiliary magnet  33  surrounds the main magnet  32 . The auxiliary magnet  33  is spaced apart from the main magnet  32  to form the magnetic gap  30 , and the voice coil  22  is inserted in the magnetic gap  30 . 
     The subsidiary magnet  34  covers a side of the main magnet  32  away from the yoke  31 . The second suspension  212  surrounds the subsidiary magnet  34 . 
     Specifically, the subsidiary magnet  34  includes a subsidiary magnet body  341  and a subsidiary magnet extension portion  342 . 
     The subsidiary magnet body  341  is fixed to a side of the main magnet  32  away from the yoke  31 . The first holder fixing portion  232  is spaced apart from and surrounds the subsidiary magnet body  341 . An outer side of the second fixing portion  2122  is fixed to a side of the first holder fixing portion  232  close to the subsidiary magnet body  341 . 
     The subsidiary magnet extension portion  342  is formed by the subsidiary magnet body  341  protruding away from the yoke  31 . 
     The fixing ring  25  is sleeved outside and fixed to and connected to the subsidiary magnet  34 . Specifically, the fixing ring  25  is sleeved outside the subsidiary magnet extension portion  342  and is fixed to and connected to the subsidiary magnet body  341 . The fixing ring  25  is configured to fix the second suspension  212  to the subsidiary magnet  34 . 
     The main pole plate  35  is fixedly sandwiched between the main magnet  32  and the subsidiary magnet body  341 . 
     The auxiliary pole plate  36  is fixed to an end of the auxiliary magnet  33  away from the yoke  31 . 
     The auxiliary pole plate  36  includes an auxiliary pole plate body  361  that is ring-shaped and fixed to the auxiliary magnet  33 , and auxiliary pole plate fixing portions  362  extending from the auxiliary pole plate body  361  toward the frame  1 . The magnetic circuit unit  3  is fixed to the frame  1 . Specifically, the auxiliary pole plate fixing portions  362  are fixed to the frame  1 . Of course, in other implementations, this purpose may also be achieved by fixing the yoke  31  to the frame  1 . 
     In this implementation, two auxiliary pole plate fixing portions  362  are provided. The two auxiliary pole plate fixing portions  362  are located at two other opposite sides of the voice coil  22 . With this structure, the two auxiliary pole plate fixing portions  362  are fixed to the frame  1 , thereby improving the reliability of fixing the magnetic circuit unit  3  to the frame  1 . 
     Compared with the related art, in the present disclosure, the fixing ring is connected to the magnetic circuit unit, and the inner peripheral side of the second suspension is fixed to an end of the fixing ring away from the yoke. With this structure, a bonding surface of the inner peripheral side of the second suspension and the fixing ring is located at the top of the fixing ring, such that the outer peripheral side of the second suspension can extend to the position of the fixing ring. Thus, the width of the second suspension is maximized, and it is beneficial to make the second suspension and the fixing ring integrated. The assembly of the diaphragm is simplified, and the effective vibration area of the second suspension is increased. In this way, the sensitivity of the speaker is improved, thereby improving the acoustic performance of the speaker. 
     The above described are merely implementations of the present disclosure. It should be noted here that those of ordinary skill in the art may make improvements without departing from the concept of the present disclosure, but such improvements should fall within the protection scope of the present disclosure.