Patent Publication Number: US-11647335-B2

Title: Speaker device

Description:
TECHNICAL FIELD 
     The present disclosure relates to the field of electro-acoustic conversion, in particular to a speaker device. 
     BACKGROUND 
     With the advent of the Internet era, the number of mobile terminal devices continues to rise. Mobile phones are undoubtedly the most common and most portable mobile terminal devices. Speaker devices are widely used in mobile terminal devices such as mobile phones for playing music, etc. The vibration unit is an important part of the speaker device, which enables the entire speaker device to vibrate and produce sound. 
     In the related art, a speaker device 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 and a voice coil driving the diaphragm to vibrate and produce sound. The diaphragm is fixed to the frame by glue. 
     When the diaphragm and the frame are fixed by glue, the glue is prone to overflow. In addition, the bottom of the diaphragm is usually coated with a material. After the diaphragm and the frame are fixed by glue, the bottom surface of the coating material is lower than that of the frame, and the bottom surface of the coating material is used as a supporting surface during subsequent mounting, which results in low dimensional consistency of gluing with a flexible printed circuit (FPC), etc., thereby leading to low product yield. 
     Therefore, it is necessary to provide a speaker device to solve the above problem. 
     SUMMARY 
     An objective of the present disclosure is to provide a speaker device, which solves the problem of glue overflow and improves the product yield. 
     In order to achieve the above objective, the present disclosure provides a speaker device. The speaker device includes a frame, a vibration unit fixed to the frame and a magnetic circuit unit driving the vibration unit to vibrate and produce sound, and the magnetic circuit unit is provided with a magnetic gap; the vibration unit includes a diaphragm, a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate and a holder connected to the diaphragm; a side of the frame close to the diaphragm is at least partially embedded into the diaphragm; a first surface is formed on a side of the frame away from the diaphragm; a second surface is formed on a side of the diaphragm close to the magnetic circuit unit; a reference surface is formed on a side of the magnetic circuit unit away from the diaphragm; and a distance between the first surface and the reference surface along a vibrating direction of the diaphragm is smaller a distance between the second surface and the reference surface along the vibrating direction of the diaphragm. 
     As an improvement, the diaphragm may include a vibrating portion provided with a through hole, a suspension portion extending from a periphery of the vibrating portion and surrounding the vibrating portion and a fixing portion bending and extending from a side of the suspension portion away from the vibrating portion along the vibrating direction of the diaphragm and fixed to the frame; and the second surface may be formed on a side of the fixing portions away from the vibrating portion. 
     As an improvement, the fixing portion may include a first fixing portion bending and extending from the suspension portion and fixed to a top of the frame, a second fixing portion bending and extending from an outer periphery of the first fixing portion along the vibrating direction of the diaphragm and fixed to an outer side surface of the frame and a third fixing portion that may be directly opposite to and spaced apart from the second fixing portion; and the frame may be interposed between the second fixing portion and the third fixing portion. 
     As an improvement, the second surface may be formed on a side of the third fixing portion away from the first fixing portion; a third surface may be formed on a side of the second fixing portion away from the first fixing portion; and a distance between the second surface and the reference surface along the vibrating direction of the diaphragm may be smaller than a distance between the third surface and the reference surface along the vibrating direction of the diaphragm. 
     As an improvement, the fixing portion may further include a gluing member that may be provided on a side of the third fixing portion away from the first fixing portion; and the second surface may be formed on a side of the gluing member away from the first fixing portion. 
     As an improvement, the vibration unit may further include an elastic support assembly fixed to the frame; and the elastic support assemblies each may include an elastic piece fixed to the frame and an auxiliary diaphragm fitted to the elastic piece. 
     As an improvement, the auxiliary diaphragm may be fitted to a side of the elastic piece away from the diaphragm. 
     As an improvement, the frame may be made of a metal material. 
     The present disclosure has the following beneficial effects. The first surface is formed on a side of the frame away from the diaphragm, the second surface is formed on a side of the diaphragm close to the magnetic circuit unit, and the reference surface is formed on a side of the magnetic circuit unit away from the diaphragm. The distance between the first surface and the reference surface along the vibrating direction of the diaphragm is smaller than the distance between the second surface and the reference surface along the vibrating direction of the diaphragm. In this way, a reserved space can be formed between the frame and the diaphragm to solve the problem of glue overflow of the frame. The distance between the first surface and the reference surface along the vibrating direction of the diaphragm is smaller than the distance between the second surface and the reference surface along the vibrating direction of the diaphragm. Therefore, during a subsequent mounting process, the first surface of the frame is used as a supporting surface, which improves the dimensional consistency for gluing with a flexible printed circuit (FPC), etc., thereby improving the product yield. 
    
    
     
       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 view illustrating a structure of a speaker device according to the present disclosure; 
         FIG.  2    is a sectional view taken along line A-A in  FIG.  1   ; 
         FIG.  3    is an exploded view of the speaker device shown in  FIG.  1   ; 
         FIG.  4    is a partial view of the speaker device shown in  FIG.  1   ; and 
         FIG.  5    is a sectional view taken along line B-B in  FIG.  4   . 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     The present disclosure is further described below with reference to the drawings and implementations. 
     It should be noted that all directional indications (such as upper, lower, left, right, front, back, inner, outer, top and bottom) in the embodiments of the present disclosure are merely intended to explain relative position relationships of components in a specific position (as shown in the figures). If the specific position changes, the directional indication changes accordingly. 
     It should be noted that when a component is “fixed” or “provided” on the other component, the component may be fixed on the other component directly or via an intermediate component. When a component is connected to the other component, the component may be connected to the other component directly or via an intermediate component. 
     Referring to  FIGS.  1  to  5   , the present disclosure provides a speaker device  100 . The speaker device includes a frame  1 , a vibration unit  2  fixed to the frame  1  and a magnetic circuit unit  3  driving the vibration unit  2  to vibrate and produce sound. The magnetic circuit unit  3  is provided with a magnetic gap. 
     Specifically, the vibration unit  2  includes a diaphragm  21 , a voice coil  22  inserted in the magnetic gap to drive the diaphragm  21  to vibrate and a holder  23  connected to the diaphragm  21 . A side of the frame  1  close to the diaphragm  21  is at least partially embedded into the diaphragm  21 . A first surface  11  is formed on a side of the frame  1  away from the diaphragm  21 . A second surface  210  is formed on a side of the diaphragm  21  close to the magnetic circuit unit  3 . A reference surface  31  is formed on a side of the magnetic circuit unit  3  away from the diaphragm  21 . A distance between the first surface  11  and the reference surface  31  along a vibrating direction of the diaphragm  21  is smaller than a distance between the second surface  210  and the reference surface  31  along the vibrating direction of the diaphragm  21 . In this way, a reserved space is formed between the frame  1  and the diaphragm  21  to solve the problem of glue overflow of the frame  1 . Meanwhile, during subsequent mounting, the first surface  11  of the frame  1  is used as a supporting surface, which improves the dimensional consistency for gluing with a flexible printed circuit (FPC), etc. 
     Further, referring to  FIG.  3   , the diaphragm  21  includes a vibrating portion  211  provided with a through hole, a suspension portion  212  extending from a periphery of the vibrating portion  211  and surrounding the vibrating portion  211  and a fixing portion  213  bending and extending from a side of the suspension portion  212  away from the vibrating portion  211  along the vibrating direction of the diaphragm  21  and fixed to the frame  1 . The second surface  210  is formed on a side of the fixing portions  213  away from the vibrating portion  211 , such that the reserved space is formed between the frame  1  and the fixing portion  213 . 
     Referring to  FIG.  4   , the fixing portion  213  includes a first fixing portion  2131  bending and extending from the suspension portion  212  and fixed to a top of the frame  1 , a second fixing portion  2132  bending and extending from an outer periphery of the first fixing portion  2131  along the vibrating direction of the diaphragm  21  and fixed to an outer side surface of the frame  1 , and a third fixing portion  2133  that is directly opposite to and spaced apart from the second fixing portion  2132 . The frame  1  is interposed between the second fixing portion  2132  and the third fixing portion  2133 , such that the side of the frame  1  close to the diaphragm  21  is at least partially embedded into the diaphragm  21 . 
     As an improvement, the second surface  210  is formed on a side of the third fixing portion  2133  away from the first fixing portion  2131 , such that a reserved space is formed between the frame  1  and the third fixing portion  2133 . This design solves the problem of glue overflow of the frame  1 , and improves the dimensional consistency of gluing with an FPC, etc. A third surface  21321  is formed on a side of the second fixing portion  2132  away from the first fixing portion  2131 . A distance between the second surface  210  and the reference surface  31  along the vibrating direction of the diaphragm  21  is smaller than that the distance between the third surface  21321  and the reference surface  31  along the vibrating direction of the diaphragm  21 , so as to form the fixing portion  213 . 
     Referring to  FIG.  5   , the fixing portion  213  further include a gluing member  2134  that is provided on a side of the third fixing portion  2133  away from the first fixing portion  2131 . The second surface  210  is formed on a side of the gluing member  2134  away from the first fixing portion  2131  to form a reserved space. Meanwhile, the first surface  11  of the frame  1  is used as a supporting surface, which improves the dimensional consistency of gluing with an FPC, etc. 
     Referring to  FIG.  2   , the vibration unit  2  further includes an elastic support assembly  24  fixed to the frame  1 . The elastic support assembly  24  include an elastic piece  241  fixed to the frame  1  and an auxiliary diaphragm  242  fitted to the elastic piece  241 . The auxiliary diaphragm  242  is fitted to a side of the elastic piece  241  away from the diaphragm  21 . This structure avoids lateral swing of the voice coil  22 , thereby improving the stability of the speaker device  100 . 
     In this implementation, the frame  1  is made of a metal material. This structure increases an overall rigidity of the speaker device, and further improves the acoustic performance of the speaker device. 
     In an implementation, the frame  1 , the diaphragm  21  and the holder  23  may be integrally injection-molded. This structure avoids the adverse effect of glue on the performance, thereby improving the acoustic performance of the speaker device  100 . It also avoids assembly errors, simplifies the assembly process and improves the production efficiency. 
     In the speaker device  100  of the present disclosure, the first surface  11  is formed on a side of the frame  1  away from the diaphragm  21 . The second surface  210  is formed on a side of the diaphragm  21  close to the magnetic circuit unit  3 . The reference surface  31  is formed on a side of the magnetic circuit unit  3  away from the diaphragm  21 . The distance between the first surface  11  and the reference surface  31  along the vibrating direction of the diaphragm  21  is smaller than the distance between the second surface  210  and the reference surface  31  along the vibrating direction of the diaphragm  21 . In this way, a reserved space is formed between the frame  1  and the diaphragm  21  to solve the problem of glue overflow of the frame  1 . The distance between the first surface  11  and the reference surface  31  along the vibrating direction of the diaphragm  21  is smaller than the distance between the second surface  210  and the reference surface  31  along the vibrating direction of the diaphragm  21 . Therefore, during subsequent mounting, the first surface  11  of the frame  1  is used as a supporting surface, which improves the dimensional consistency of gluing with an FPC, etc., thereby improving the product yield. 
     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 utility model.