Patent ID: 8906124

Claim:
A dust collecting device, which is configured to be removably attached to a portable power tool and carriable together with the portable power tool, wherein the dust collecting device configured to collect dust generated when a predetermined operation is performed on a workpiece by driving a tool bit coupled to the power tool, comprising: a dust suction region that sucks dust generated during operation in response to the operation of the tool bit, a dust transfer region that transfers the dust sucked in the dust suction region, a dust storage region that communicates with the dust transfer region and stores the dust, a grounding member through which static charge on the dust is dissipated, the grounding member being disposed inside the dust storage region, the grounding member comprising an electrically-conductive material, a dust storage region mounting part to which the dust storage region is attached, the dust storage region being removably attached to the dust storage region mounting part, and an intervening member which is provided on the dust storage region mounting part, the intervening member being formed of conductive elastic material, wherein when the dust storage region is attached to the dust storage region mounting part, the intervening member (i) electrically connects a) an electrically-conductive region of the dust collecting device or an electrically-conductive region of the power tool to which the dust collecting device is attached and b) the grounding member so that the static change on the dust stored in the dust storage region is dissipated to the electrically-conductive region of the dust collecting device or the electrically-conductive re ion of the power tool through the grounding member, and (ii) also serves to cushion a contact region between the dust storage region and the dust storage region mouunting part, the intervening member elastically supporting the dust storage region.