Speaker module

Abstract

A speaker module is provided. The speaker module includes a speaker unit, a box and a shape memory alloy. The box has a rear wall and an opening. The shape memory alloy connects the speaker unit and the rear wall.

What is claimed is: 
     
         1 . A speaker module, comprising:
 a speaker unit;   a box, having a rear wall and an opening; and   a first shape memory alloy, connecting the speaker unit and the rear wall.   
     
     
         2 . The speaker module according to  claim 1 , further comprising two screws, one end of each of the screws being a stopper end and the other end of each of the screws being a thread end, wherein the thread ends of the screws are locked to the rear wall, both sides of the speaker unit have a through hole respectively, and each of the screws passes through one of the through holes. 
     
     
         3 . The speaker module according to  claim 2 , further comprising four resilient sleeves arranged on the screws in pairs, wherein the resilient sleeves on each of the screws are respectively situated between the stopper end and the speaker unit or between the rear wall and the speaker unit. 
     
     
         4 . The speaker module according to  claim 3 , further comprising a second shape memory alloy connecting the speaker unit and the rear wall, wherein the screws, the first shape memory alloy and the second shape memory alloy are disposed on the rear wall in a row, and the first shape memory alloy and the second memory alloy are situated between the screws. 
     
     
         5 . The speaker module according to  claim 4 , wherein the rear wall has two screw barrels disposed thereon, and the thread end of each of the screws is locked into one of the screw barrels. 
     
     
         6 . The speaker module according to  claim 5 , wherein the box further has an annular sidewall connecting between the rear wall and the opening, and the annular sidewall has telescopic creases. 
     
     
         7 . The speaker module according to  claim 1 , wherein the first shape memory alloy is spring-like or cylindrical. 
     
     
         8 . The speaker module according to  claim 1 , wherein the box further has an annular sidewall connecting between the rear wall and the opening, wherein the annular sidewall has telescopic creases.