Patent Publication Number: US-11032636-B2

Title: Speaker module

Description:
TECHNICAL FIELD 
     The present disclosure relates to electroacoustic conversion technology, and in particular, to a speaker module. 
     BACKGROUND 
     With an advent of a mobile Internet era, a time for updating electronic products becomes shorter and shorter, and requirements on performance of electronic products in various aspects are becoming higher and higher, for example, on high-quality music function. Therefore, the performance of electroacoustic systems needs to be continuously improved. Thus, a high-quality speaker module is one of essential conditions for a high-quality music function. 
     A DBASS polymer nano-amplification technology based on excellent sound effect thereof has been widely used in various electronic products. Currently, during a process of manufacturing a speaker module using a DBASS process, DBASS polymer nano-powder is generally filled into a specific area of a housing firstly, and a mesh is disposed to block the filling polymer nano-powder, and then a speaker unit is installed. However, as a shape of the injection area is limited by different installation environments, amount of polymer nano-powder to be filled cannot be ensured, thereby affecting sound amplification effect of products. 
     Therefore, it is necessary to provide a new speaker module to resolve the above problems. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a speaker module of the present disclosure; 
         FIG. 2  is an exploded view of a speaker module of the present disclosure; 
         FIG. 3  is a partial schematic assembled view of a speaker module of the present disclosure; 
         FIG. 4  is a cross-sectional view along an A-A line shown in  FIG. 1 . 
     
    
    
     DETAILED DESCRIPTION 
     The present disclosure will be further described with reference to the accompanying drawings. 
     As shown in  FIG. 1  and  FIG. 2 , the present disclosure provides a speaker module  100  which includes a housing  1  having an accommodating space and a speaker unit  3  accommodated in the housing  1 . 
     The housing  1  includes an upper housing  11  having a top wall  101  and a lower housing  12  having a bottom wall  102 . At least one of the upper housing  11  and the lower housing  12  have a side wall  103  extending in a bending manner. The side wall  103 , the top wall  101 , and the bottom wall  102  define the accommodating space together. The side walls  103  may be in regular shapes parallel to each other, or may be irregular structures. 
     The accommodating space includes an accommodating cavity  10  for accommodating the speaker unit  3 , and a first filling cavity  20  and a second filling cavity  30  for accommodating a filling material. The first filling cavity  20  and the second filling cavity  30  are disposed at either side of the speaker unit  3  respectively, and the accommodating cavity and the two filling cavities are disposed opposite to and separately from each other. The filling material in the first filling cavity  20  and the second filling cavity  30  are both sound-absorbing materials. Specifically, powder filling is used in the present disclosure, and the first filling cavity  20  and the second filling cavity  30  are filled with sound-absorbing polymer particles. The first filling cavity  20  and the second filling cavity  30  are located at either side of the accommodating cavity  10  respectively. 
     The speaker module is further provided with an isolating member. Specifically, the isolating member includes a first isolating member  4  isolating the accommodating cavity  10  from the first filling cavity  20  and a second isolating member  5  isolating the accommodating cavity  10  from the second filling cavity  30 . 
     There are two first isolating members  4  disposed perpendicular to each other. The two first isolating members  4 , the top wall  101 , the bottom wall  102 , and the side wall  103  define the first filling cavity  20  together. Correspondingly, the second isolating member  5 , the top wall  101 , the bottom wall  102 , and the side wall  103  define the second filling cavity  30  together. 
     The first isolating member  4  includes a first metal frame  41  and an air-permeable isolating mesh  42  attached to the first metal frame  41 . The first metal frame  41  includes a first top border  411  adjacent to the top wall  101 , a first bottom border  412  adjacent to the bottom wall  102 , a first side border  413  and a first middle border  414  that connect the first top border  411  and the first bottom border  412 . An outer edge of the air-permeable isolating mesh extends beyond an outer edge of the isolating frame, and the air-permeable isolating mesh can reduce a risk of powder leakage and has buffering, sealing and damping functions. 
     As shown in  FIG. 3  and  FIG. 4 , protrusion portions  415  are disposed at connected positions between the first top border  411  and the first middle border  414  and between the first bottom border  412  and the first middle border  414  respectively. The protrusion portion  415  has a height of 0.03 mm to 0.07 mm. In this embodiment, a distance between the protrusion portion  415  and the first top border  411  or between the protrusion portion  415  and the first bottom border  412  is 0.05 mm. The protrusion portion  415  on the first top border  411  abuts against the top wall  101  and the protrusion portion  415  on the first bottom border  412  abuts against the bottom wall  102  respectively. In this embodiment, the first top border  411  and the first bottom border  412  are both provided with the protrusion portion  415 . In other alternative embodiments, the first top border  411  and the first bottom border  412  may also be both provided with the protrusion portion  415 . 
     The upper housing  11  is disposed with an upper steel plate  13  and the upper steel plate  13  and the upper housing  11  are integrally injection-molded. The lower housing  12  is disposed with a lower steel plate  14  and the lower steel plate  14  and the lower housing  12  are integrally injection molded. The protrusion portions  415  are connected to the upper steel plate  13  and the lower steel plate  14  by spot welding respectively. In an actual assembly process, the protrusion portion is welded to the steel plates injection-molded in the housing from the outside of the speaker module by laser welding, resistance welding, or in other welding methods after the speaker module is completed assembly. 
     Of course, this is only a preferred embodiment. In practice, the protrusion portion may be disposed only on one of the first top border  411  and the first bottom border  412 , or may be disposed at any position on the first top border  411  or the first bottom border  412 . 
     The second isolating member  5  includes a second metal frame  51  and an air-permeable isolating mesh  52  attached to the second metal frame  51 . The second metal frame  51  includes a second top border  511  adjacent to the top wall  101  and a second bottom border  512  adjacent to the bottom wall  102 , and a second side border and a second middle border that connect the second top border  511  and the second bottom border  512 . Preferably, the second isolating member  5  may also be provided with a second protrusion portion  515 , and the second protrusion portion  515  may be disposed on the second top border  511 , or may be disposed on the second bottom border  512 . In other alternative embodiments, the second protrusion portion  515  may be disposed on both the second top border  511  and the second bottom border  512 . 
     In addition, the speaker module further includes a flexible printed circuit board (FPCB) for electrical connection. The flexible printed circuit board extends from the accommodating cavity  10  to the second filling cavity  30  and even extends to the outside of the speaker module. The second bottom border  512  is provided with an avoiding portion  5120  for avoiding the flexible printed circuit board. 
     Further, the bottom wall  102  is provided with a slot  121  protruding toward the top wall  101 , and two ends of the first isolating member  4  and the second isolating member  5  are inserted into the slots respectively, to facilitate positioning the isolating member. 
     The above structure can isolate the accommodating cavity  10  from the first filling cavity  20  and from the second filling cavity  30 , so that the first filling cavity  20  and the second filling cavity  30  can be filled up with the DBASS polymer nano-powder, which cannot affect the performance of the speaker unit, and fully utilize space. 
     The speaker module of the present disclosure includes a housing having an accommodating space and a speaker unit accommodated in the accommodating space. The housing includes a bottom wall, a top wall opposite to the bottom wall, and a side wall extending from the bottom wall to the top wall. The speaker module further includes at least one first isolating member connected to the bottom wall and the top wall respectively. The first isolating member isolates the accommodating space into an accommodating cavity for accommodating the speaker unit and a first filling cavity for accommodating an sound-absorbing material, and the accommodating cavity is disposed opposite to the first filling cavity and separately from the first filling cavity. The first filling cavity is filled with the sound-absorbing material. The first isolating member includes a first metal frame and an air-permeable isolating mesh attached to the first metal frame. The first metal frame includes a first top border adjacent to the top wall and a first bottom border adjacent to the bottom wall. The first top border and/or the first bottom border is provided with a protrusion portion, and the protrusion portion abuts against the top wall or the bottom wall and is connected to the top wall or the bottom wall by spot welding. With respect to the speaker module of the present disclosure, the isolating member isolates the accommodating space into at least two parts, and the filling cavity is sealed and isolated from the speaker unit, so that the filling cavity can be filled up with a filling material, thereby making full use of the space, thereby enhancing the sound amplification effect, and improving the product performance. 
     Although the embodiments of the present disclosure are shown and described above, it can be understood that, the foregoing embodiments are exemplary, and cannot be understood as a limitation to the present disclosure. Within a scope of the present disclosure, a person of ordinary skill in the art may make changes, modifications, replacement, and variations to the foregoing embodiments.