Buoyancy device and portable electronic assembly using the same

Abstract

A portable electronic assembly includes a portable electronic device and a covering buoyancy device, the buoyancy device includes an housing and a cavity, the cavity includes at least one first primary cavity and at least one second primary cavity isolated from the at least one first primary cavity.

What is claimed is: 
     
         1 . A buoyancy device comprising:
 a housing; and   a cavity defined and sealed inside the housing,   wherein the cavity comprises at least one first primary cavity and at least one second primary cavity separated from the first primary cavity.   
     
     
         2 . The buoyancy device of  claim 1 , wherein the first primary cavity is substantially a honeycomb structure and comprises at least two isolated first subsidiary cavities. 
     
     
         3 . The buoyancy device of  claim 2 , wherein the second primary cavity comprises at least two isolated second subsidiary cavities. 
     
     
         4 . The buoyancy device of  claim 3 , wherein the housing comprises a bottom board and a plurality of side boards surrounding the bottom board, the side boards are higher than the bottom board to form an accommodation cavity. 
     
     
         5 . The buoyancy device of  claim 4 , wherein the bottom board comprises a bottom wall and a top wall apart from the bottom wall, the first primary cavity is formed inside the bottom board and located between the bottom wall and the top wall, each said first subsidiary cavity comprises a plurality of separating plates connected end to end, the separating plates connect to the bottom wall and the top wall. 
     
     
         6 . The buoyancy device of  claim 5 , wherein the second primary cavity is formed inside the side boards and disposed outside of the first primary cavity, each said second subsidiary cavity comprises a plurality of supporting plates connecting to the separating plates and the side boards. 
     
     
         7 . The buoyancy device of  claim 1 , wherein separating plates and side boards of a honeycomb structure of the buoyancy device are made of small cells. 
     
     
         8 . The buoyancy device of  claim 1 , wherein the cavity is filled with small cells. 
     
     
         9 . A buoyancy device comprising:
 a housing having a bottom board and a plurality of side boards surrounding the bottom board,   a cavity defined and sealed inside the housing having at least one first primary cavity and at least one second primary cavity separated from the first primary cavity;   wherein the at least one first primary cavity defined inside the bottom board, and the at least one second primary cavity defined inside the side boards and located outside of the at least one first primary cavity.   
     
     
         10 . The buoyancy device of  claim 9 , wherein the bottom board comprises a bottom wall and a top wall apart from the bottom wall, the first primary cavity is located between the bottom wall and the top wall, the first primary cavity is substantially a honeycomb structure and comprises at least two isolated first subsidiary cavities, each said first subsidiary cavity comprises a plurality of separating plates connected end to end, the separating plates connect to the bottom wall and the top wall. 
     
     
         11 . The buoyancy device of  claim 10 , wherein the second primary cavity comprises at least two isolated second subsidiary cavities, each said second subsidiary cavity comprises a plurality of supporting plates connecting to the separating plates and the side boards. 
     
     
         12 . A portable electronic assembly comprising:
 a portable electronic device; and   a buoyancy device assembled on the portable electronic device and comprising:   a housing; and   a cavity inside the housing;   wherein the cavity comprises at least one first primary cavity and at least one second primary cavity separated from the first primary cavity.   
     
     
         13 . The portable electronic assembly of  claim 12 , wherein the first primary cavity is substantially a honeycomb structure and comprises at least two isolated first subsidiary cavities. 
     
     
         14 . The portable electronic assembly of  claim 13 , wherein the second primary cavity comprises at least two isolated second subsidiary cavities. 
     
     
         15 . The portable electronic assembly of  claim 14 , wherein the buoyancy device is a protection case, the housing comprises a bottom board and a plurality of side boards surrounding the bottom board, the side boards are higher than the bottom board to form an accommodation cavity, the portable electronic device is accommodate in the accommodation cavity. 
     
     
         16 . The portable electronic assembly of  claim 15 , wherein the bottom board comprises a bottom wall and a top wall apart from the bottom wall, the first primary cavity is formed between the bottom wall and the top wall, each said first subsidiary cavity comprises a plurality of separating plates connected end to end, the separating plates connect to the bottom wall and the top wall. 
     
     
         17 . The portable electronic assembly of  claim 16 , wherein the second primary cavity is formed in the side boards and disposed outside of the first primary cavity, each said second subsidiary cavity comprises a plurality of supporting plates connecting to the separating plates and the side boards. 
     
     
         18 . The portable electronic assembly of  claim 12 , wherein the buoyancy device is a battery cover, the portable electronic device comprises a membrane covering the cavity. 
     
     
         19 . The portable electronic assembly of  claim 12 , wherein separating plates and side boards of a honeycomb structure of the buoyancy device are made of small cells. 
     
     
         20 . The portable electronic assembly of  claim 12 , wherein the cavity is filled with small cells.