Patent ID: 8197310

Claim:
A dust box comprising: an attachment portion configured to be attached to a dust-discharging nozzle extending from a housing of an electric tool; and a dust-collecting portion connected to the attachment portion and configured to store dust particles to be discharged from the nozzle, wherein the dust-collecting portion comprises a box which is made of synthetic resin and configured to be detachably connected to the attachment portion, and a bag received in the box and configured to store the dust particles to be discharged from the nozzle, the attachment portion and the dust-collecting portion are connected by means of at least one hook and corresponding engagement portion, the hook being formed on the attachment portion when the engagement portion is formed on the box, and being formed on the box when the engagement portion is formed on the attachment portion and configured such that the hook is elastically coupled to the engagement portion when the attachment portion and the dust-collecting portion are assembled together, the hook protrudes backward from the attachment portion, and the engagement portion extends from an opening of the box and is folded back outward so as to extend backward along a side surface of the box without contacting thereto, and wherein the engagement portion provides an elastic strip onto which the hook is elastically hooked at a front-side portion of the elastic strip while a rear-side portion thereof is exposed when the attachment portion and the dust-collecting portion are assembled together, and an elastic engagement between the hook and the engagement portion is disengaged by depressing the rear-side portion of the elastic strip toward the side surface of the box.