Patent Publication Number: US-2023148010-A1

Title: Speaker and electronic device

Description:
FIELD OF THE INVENTION 
     The present disclosure relates to a speaker, and in particular, to an electronic device with a loudspeaker module. 
     BACKGROUND 
     Generally, an electronic device, such as a mobile phone, uses a speaker as a sound generator. 
     A typically speaker includes a holder having a hollow space, a magnetic system received into the hollow space, a diaphragm attached to the holder and covered on the magnetic system. The speaker in the related art has a big size due to the low magnetic efficiency. 
     Therefore, it is desired to provide an improved loudspeaker module for portable electronic devices. 
     SUMMARY 
     In one aspect, the present disclosure provides A speaker comprising: a frame; a magnetic circuit system fixed to the frame, comprises a plurality of magnetic circuit devices connected to each with a magnetic gap; a vibration system driven by the magnetic to vibrator, comprises a diaphragm fixed to the frame and a plurality of voice coil assembly inserted into the magnetic gap drive the diaphragm vibrate jointly. 
     Further, wherein the magnetic circuit devices comprises a yoke and a magnetic assembly received in the yoke; the yoke comprises a bottom wall that carries the magnetic assembly, a sidewall bending and extending from the bottom wall towards the diaphragm, and a connecting portion protruding along a direction away from the magnetic assembly; the side wall and the magnetic assembly are spaced to form the magnetic gap, the multiple magnetic circuit device are connected to each through the connecting portion. 
     Further, wherein two adjacent yoke are connected to each by welding and glue. 
     Further, wherein the yoke further comprise a magnetic circuit fixing portion fixed to the frame extending from the side wall towards a direction away from the magnetic assembly, the magnetic circuit fixing portion is spaced from the connecting portion. 
     Further, wherein the vibration system further comprises a elastic diaphragm assembly fixed to the frame while elastically supporting the diaphragm, the elastic diaphragm assembly comprises a elastic diaphragm fixed to the frame and an auxiliary skeleton connected with the elastic diaphragm and the diaphragm, the elastic diaphragm is spaced apart from the diaphragm along a direction that the diaphragm vibrates. 
     Further, wherein the voice coil assembly comprises a voice coil with a voice coil lead and a skeleton connected the voice coil and the diaphragm, the diaphragm comprises a dome with and a suspension ring portion arranged around the dome, the suspension ring portion comprises a fixing portion fixedly to the frame, a connecting portion connected to the dome, and a suspension ring connecting the fixing portion with the connecting portion, the suspension ring comprises at least one bending portion protruding along the direction that the diaphragm vibrates. 
     Further, wherein the dome is arranged in a rectangular shape and surrounding by the bending portion, four corners of the bending portion providing with a striped patterns recessed from the bending portion. 
     Further, wherein further comprises a moulding portion protruding along the direction that the diaphragm vibrates from the dome. 
     Further, wherein further comprises an external pad embedded in the frame and connected to an external circuit, a circuit board attached to the dome, and a braided wire electrically connects the circuit board and the external pad, the voice coil electrically connects to the circuit board through the voice coil lead. 
     In another aspect, the present disclosure provides an electronic device including a speaker as described above. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to explain the technical solutions of the embodiments of the present disclosure more clearly, accompanying drawings used to describe the embodiments are briefly introduced below. It is evident that the drawings in the following description are only concerned with some embodiments of the present disclosure. For those skilled in the art, in a case where no inventive effort is made, other drawings may be obtained based on these drawings. 
         FIG.  1    is a three-dimensional view illustrates a speaker in accordance with the present disclosure; 
         FIG.  2    is a explode view of the speaker shown in  FIG.  1   ; 
         FIG.  3    is a top view of the speaker shown in  FIG.  1   ; 
         FIG.  4    is a cross-sectional view along the line A-A in  FIG.  3   ; 
         FIG.  5    is a three-dimensional view of the speaker shown in a different angle in  FIG.  1   ; 
         FIG.  6    is a three-dimensional view of the magnetic circuit system of the speaker shown in  FIG.  1   ; 
         FIG.  7    is a three-dimensional view of the magnetic circuit device of the magnetic circuit system show in the  FIG.  6   ; 
         FIG.  8    is a explode view of the magnetic circuit device shown in the  FIG.  7   ; 
         FIG.  9    is a top view of the magnetic circuit device shown in the  FIG.  7   ; 
         FIG.  10    is a cross-sectional view along the line B-B in  FIG.  9   ; 
         FIG.  11    is a three-dimensional view illustrates a speaker in accordance to another embodiment with the present disclosure; 
         FIG.  12    is a three-dimensional view illustrates a speaker in accordance to another embodiment with the present disclosure; and . 
         FIG.  13    is a three-dimensional view illustrates a speaker in accordance to another embodiment with the present disclosure. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     The present disclosure will be further illustrated with reference to the accompanying drawings. It shall be noted that the elements of similar structures or functions are represented by like reference numerals throughout the figures. The embodiments described herein are not intended as an exhaustive illustration or description of various other embodiments or as a limitation on the scope of the claims or the scope of some other embodiments that are apparent to one of ordinary skills in the art in view of the embodiments described in the Application. In addition, an illustrated embodiment need not have all the aspects or advantages shown. 
     As shown in the  FIGS.  1 - 10   . The present invention discloses a speaker, which includes a frame  100 , a vibration system  200  fixed to the frame  100 , and a magnetic circuit system  300  that drives the vibration system  200  to vibrate. The vibration system  200  includes a diaphragm  210  fixed to the frame  100 , a plurality of voice coil assemblies  220  that drives the diaphragm  210  to vibrate and produce sound, and an elastic diaphragm assembly  230  that elastically supports the diaphragm  210 . The voice coil assembly  220  includes a voice coil  221  and a skeleton  222  connected voice coil  221  and the diaphragm  210 . 
     In the present embodiment, the diaphragm  210  includes a dome  211  and a suspension ring portion  212  arranged around the dome  211 . As shown in  FIG.  2   , dome  211  is arranged in a rectangular structure and has a moulding portion  2111  protruding along the vibration direction. Such a setting is beneficial to optimize the vibration mode of the diaphragm, obtain better high-frequency performance, making it has a better vibration and sound effect. In other optional implementation, the moulding portion  2111  may also be formed recessed from the dome  211 . In some optional embodiments, as shown in  FIGS.  11  to  12   , the dome  211  may also be configured as a flat plate. The suspension ring portion  212  includes a fixing portion  2121  that is fixedly connected to the frame  100 , a connecting portion  2122  connected to the dome  211 , and a suspension ring  2123  connecting the fixing portion  2121  and the connecting portion  2122 . The suspension ring  2123  includes a bending portion 2124 protruding along the vibration direction, and four corners of the bending portion 2124 are provided with striped patterns 2125 recessed from the bending portion 2124. Such a setting can effectively improve the problem of easy discounting at the corners when the diaphragm  210  vibrates up and down, and effectively improve the balance and stability of the vibration of the diaphragm, the pure tone, distortion and swing of the speaker, and enable the speaker to obtain better acoustic performance. In other optional embodiments, as shown in  FIG.  13   , the suspension ring may further include two bending portions 2124 protruding along the vibration direction. the suspension ring portion  212  is made of rubber, silica gel, or foamed material. The dome  211  is made of a single-layer composite material or a multi-layer composite material. The material of dome  211  includes but is not limited to carbon fibre, aluminium foil, fibre paper and foam. 
     As shown in  FIGS.  2  and  4   , the elastic diaphragm assembly  230  includes an elastic diaphragm  231  fixed to the frame  210  and an auxiliary skeleton  232  connected with the elastic diaphragm  231  and the diaphragm  210 . The elastic diaphragm  231  is spaced apart from the diaphragm  210  along the vibration direction of the vibration system  200 . By providing the elastic diaphragm assembly  230  that elastically supports the diaphragm  210 , the diaphragm  210  can be effectively restrained from swinging laterally during the vibration and sound production process, thereby improving the sound effect of the speaker. Further, the material of the elastic diaphragm  231  may be mesh cloth, rubber, etc., making the elastic diaphragm  231  can better elastically support the diaphragm  210 . 
     The magnetic circuit system  300  includes a plurality of magnetic circuit devices  301 . Each magnetic circuit device  301  includes a yoke  310  and a magnetic assembly  320  contained in the yoke  310 . The yoke  310  includes a bottom wall  311  that carries the magnetic assembly  320 . The bottom wall  311  and the sidewall  312  bent and extended from the bottom wall  311 , the magnetic assembly  320  and the sidewall  312  are spaced to form a magnetic gap  340 , and the multiple voice coil assemblies  220  are arranged in one-to-one correspondence with the multiple magnetic circuit devices  301 . They are respectively inserted into the magnetic gap  340  to jointly drive the diaphragm  210  to vibrate and produce sound. The correspondingly arranged multiple magnetic circuit devices  301  and multiple voice coil assemblies  220  jointly drive the diaphragm  210  to vibrate and produce sound so that the speaker can drive the diaphragm to vibrate and produce sound with a greater driving force. The magnetic circuit system  300  has a higher magnetic field. The efficiency makes the speaker have a better sound effect, and this arrangement is also conducive to the miniaturization of the speaker. When the speaker of the present invention is applied to a car, it can be used as a car speaker, which can meet the parameter requirements of the car speaker for high sound quality, small size and flexible layout, low power consumption and small vibration. 
     As shown in  FIGS.  7 - 8   , the bottom wall  311  of the yoke  310  is set in a circular shape, and the corresponding side wall  312  is set in a hollow cylinder. It is understood that, in other optional implementations, the yoke  310  can be set to other geometric forms. The sidewall  312  away from the magnetic assembly  320  is protruding provided with a connecting portion  3121  and a magnetic circuit fixing portion  3122 . The connecting portion  3121  and the magnetic circuit fixing portion  3122  are arranged at intervals along the ring direction. The yoke  310  is positioned and fixedly connected to the frame  100  via the magnetic circuit fixing portion  3122  so that the communicating parts  3121  on two adjacent yoke  310  can be accurately aligned, improving the assembly accuracy and the bonding strength of the magnetic circuit device  301  and the frame  100 . The communicating portion  3121  has a longer length than the fixed portion  3122  in the radial direction, and the communicating portions  3121  of two adjacent yoke are connected to each other by welding and sealing glue, and the two adjacent magnetic circuit devices  301  are thus fixedly connected to each other, so that The magnetic circuit system  300  has higher structural strength, thereby improving the overall structural stability of the speaker. 
     In this implementation, the magnetic circuit device  301  includes two arranged side by side. Certainly, in some other optional embodiments, the magnetic circuit device  301  can also be provided with three, four or more. The setting position can be adjusted according to the specific design of the speaker and the application field of the product. 
     The frame  100  has a rectangular parallelepiped shape, so that the speaker has a rectangular parallelepiped shape, and a plurality of magnetic circuit devices  301  are arranged in the inner cavity of the frame  100  along the length direction of the frame  100 . Specifically, the frame is provided with a plurality of installation grooves 101, and a plurality of magnetic circuit devices  301  are correspondingly provided in each installation groove 101. 
     The magnetic assembly  320  includes a first magnet  321  and a second magnet  322  arranged oppositely, and a pole core  323  sandwiched between the first magnet  321  and the second magnet  322 . The first magnet  321 , a pole core  323 , and a second magnet  322  are sequentially stacked on the bottom wall  311  of the yoke  310 . The side of the first magnet  321  and the second magnet  322  close to the pole core  323  is set as a magnetic pole. 
     In the present embodiment, the magnetic field strength is provided by the first magnet  321  and the second magnet  322 , passing through the pole core  323 , the yoke  310  forms a closed magnetic field so that the voice coil  221  can reciprocate in the magnetic gap of  340 . 
     As shown in  FIGS.  4  and  5   , the speaker further includes an external pad  400  embedded in the frame  100  and connected to an external circuit, and a circuit board  401  attached to the dome  211 , and the braided wire  402  that electrically connects the circuit board  401  and the external pad  400 . The voice coil  221  is electrically connected to circuit board  401  through the voice coil lead  2211  to realize the electrical connection between the voice coil  221  and the external circuit. This arrangement saves valuable design space inside the speaker, facilitates the miniaturization of the speaker design, and enables the speaker to have a more stable circuit connection. 
     Referring to the  FIGS.  1 - 13   . This practical new type also provides a type of electrical device, which includes any implementation examples above. 
     In the speaker provided by the practical new type, multiple magnetic circuit devices jointly drive the vibration system to vibrate and produce sound so that the speaker has a higher magnetic field efficiency, which is beneficial to the miniaturization of the speaker. In addition, because the multiple magnetic circuit devices are fixedly connected to each other, so the magnetic circuit system has higher structural strength, thereby improving the overall structural stability of the speaker. Although the invention is described with reference to one or more embodiments, the above description of the embodiments is used only to enable people skilled in the art to practice or use the invention. It should be appreciated by those skilled in the art that various modifications are possible without departing from the spirit or scope of the present invention. The embodiments illustrated above should not be interpreted as limits to the present invention, and the scope of the invention is to be determined by reference to the claims that follow.