Negative pressure tabletop dust collecting machine

Abstract

A negative pressure table-top dust collecting machine includes a machine box formed with an interior space, an operation faceplate assembled on the machine box and bored with numerous wind-sucking vents, a fixing base disposed in the interior space of the machine box, a dust collecting unit fitted with the fixing base and provided with dust collecting bags, and a blower positioned in the interior space of the machine box. When the blower is started to operate, the air in the interior of the machine box is pumped out of the machine box, letting the interior of the machine box produce negative pressure. Simultaneously, through the dust collecting bags and the fixing base, each wind-sucking vent of the operation faceplate will produce a vacuum suction force to suck the dust produced during processing into the dust collecting bags to be gathered.

1 . A negative pressure tabletop dust collecting machine comprising: 
 a machine box formed with a closed interior space, said machine box having its top wall bored with a wind vent at a preset location, said machine box having one side wall bored with a wind-exhausting opening;    an operation faceplate closely assembled on the top wall of said machine box, said operation faceplate having its topside formed with a table top, said table top bored with numerous wind-sucking vents communicating with said wind vent of said machine box;    a fixing base closely fixed on the underside of the top wall of said machine box and positioned at said wind vent, said fixing base bored with a first opening and a second opening, said first opening communicating with said wind vent of said machine box;    a dust collecting unit provided with at least one dust collecting bag, said dust collecting bag closely assembled with said second opening of said fixing base, the bag mouth of said dust collecting bag communicating with said second opening of said fixing base; and    a blower installed in said interior space of said machine box, said blower provided with a wind intake and a wind outlet, said wind outlet of said blower closely combined with said wind-exhausting opening at one side of said machine box.    
   
   
       2 . The negative pressure table-top dust collecting machine as claimed in  claim 1 , wherein said wind vent of said machine box is vertically bored in the intermediate portion of its top wall, said machine box having the opposite sides of its topside respectively bored with a plurality of recessed guide grooves, each said guide groove having its bottom slanting downward toward said wind vent in the intermediate portion of said machine box.  
   
   
       3 . The negative pressure table-top dust collecting machine as claimed in  claim 1 , wherein said machine box is pivotally provided with a door plate at one side where said dust collecting unit is located.  
   
   
       4 . The negative pressure table-top dust collecting machine as claimed in  claim 1 , wherein said machine box has two opposite sides respectively provided with a recessed grasping groove.  
   
   
       5 . The negative pressure table-top dust collecting machine as claimed in  claim 1 , wherein said fixing base has a frame body provided with an upper and a lower side hollowed out to form a first opening and a second opening.  
   
   
       6 . The negative pressure table-top dust collecting machine as claimed in  claim 1 , wherein said fixing base has its opposite lower sides respectively formed with a slide groove for said dust collecting unit to be slidably fitted and positioned therein.  
   
   
       7 . The negative pressure table-top dust collecting machine as claimed in  claim 1 , wherein said dust collecting unit is composed of a frame body having at least one air vent, the bag mouth of said dust collecting bag fixed on the peripheral edge of said air vent, said frame body of said dust collecting unit movably fitted with said fixing base.