Combinatory board

Abstract

A combinatory board includes two boards disposed separately, a fixing element, and a mask cover. The outer surface of each board has a buffering material. Both sides of the fixing element have a fixing arm, respectively. The inner side of each fixing arm is formed with a joining section corresponding to the side of the boards, so that the fixing arms on both sides of the fixing element connect to the two boards. More than one vent hole is formed around the fixing element. Both sides of the mask cover are formed with a set of connecting arm, respectively. The inner side of the connecting arm has a connecting surface corresponding to the outer side of the fixing arm of the fixing element. The outer surface of the mask cover further has another buffering material.

1 . A combinatory board, comprising:
 two boards disposed separately, each of which has two opposite sides; wherein each of the sides has a slant section and an extension section, the angle subtended by the slant sections of the boards expands downward, and the outer surface of each of the boards has a buffering material;   a fixing element, whose bottom is bent to form a locking part; wherein both sides of the fixing element have a fixing arm, respectively, the inner side of each of the fixing arms is formed with a joining section that corresponds to the slant section and extension section of the board and expands outwards, so that the inner sides of the fixing arms on both sides of the fixing element connect to the separate boards, the outer side of the fixing arm is formed with a set of connecting section and arc section, and more than one vent hole is formed around the fixing element; and   a mask cover, both sides of which are formed with a set of connecting arm; wherein the inner side of each of the connecting arm has a connecting surface corresponding to the connecting section and the arc section, and the outer surface of the mask cover has another buffering material.   
     
     
         2 . The combinatory board of  claim 1 , wherein each of the sides first tilts upwards to form the slant section, and the end of the slant section bends downwards and extends to form the extension section. 
     
     
         3 . The combinatory board of  claim 1 , wherein the locking part of the fixing element is penetrated with a lock hole for a locking element. 
     
     
         4 . The combinatory board of  claim 1 , wherein the fixing arms on both sides of the fixing element tilt downwards, and the end of the connecting section on the outer side of each of the fixing arms protrudes outwards to form the arc section. 
     
     
         5 . The combinatory board of  claim 1 , wherein an airflow space is formed between the adjacent sides of the boards and the mask cover, and a gap connecting to the airflow space and the exterior is formed between the end of the connecting arm of the mask cover and the extension section of the two adjacent sides. 
     
     
         6 . The combinatory board of  claim 1 , wherein the surface of each of the boards different from the side is formed a plurality of strengthening ribs in the longitudinal direction.