Abstract: A power carving tool has a housing, a driving motor, a cam shaft engaged with the rotary shaft of the driving motor and having a cooling fan, a cam sleeve with a slanted cam surface, engaged with the cam shaft and reliably held by a ball bearing supported by the housing, and an output shaft moved reciprocatingly by bringing a contact portion provided at the rear portion thereof into contact with the cam surface thereby to maintain a stable rotation of the cam sleeve and to avoid mechanical loss.

Abstract: A router attachment is provided for converting a small hand-held rotary cutting tool into a miniature router. The attachment has a base having a planar lower surface, a central aperture, an upright column and a handle. A tool holder slidably mounted on the upright column is provided with a clamp for affixing the rotary cutting tool thereto. A height adjustment mechanism enables the user to adjust the height of the tool holder relative to the base planar lower surface and a lock mechanism releasably locks the tool holder to the base column during use.

Abstract: An electrode terminal holder is disclosed for holding two electrode terminals in contact with battery terminals of a power unit and for fixing the electrode terminals to a housing of the power unit. The electrode holder includes a first electrode holding portion and a second electrode holding portion for mounting the electrode terminals onto the first electrode terminal holding portion. The first and second electrode terminal holding portions having engaging portions for integrally coupling the first and second electrode terminal holding portions. The first electrode terminal holding portion has electrode terminal insertion holes provided at their inner surfaces with support walls for the electrode terminals. The the second electrode terminal holding portion has pressure pieces for the electrode terminals against the support walls of the electrode terminal insertion holes when the engaging portions are engaged.

Abstract: A battery type screw driver has an auxiliary switch 39 in addition to a main switch 37. A clutch 30 is provided between a driving shaft 16 and a driven shaft 11. A central bore 32 is formed along the central axis of the driving shaft 16. The operation bar 33 passes through the bore 32. A front end part of the operation bar 33 is connected to the driven shaft 11, while a rear end part thereof protrudes backwardly of the driving shaft 16. An auxiliary switch 39 is disposed in series with the main switch 37 in an electric circuit between the motor 8 and a battery 35. The auxiliary switch 39 is turned on when depressed by the operation bar 33 sliding backward when the screw 24 is fastened. The operation bar slides coaxially with the central axis of the driving shaft.

Abstract: A power tool comprises a tool body having a grip portion and composed of a pair of base and cover housing halves, a chuck which is mounted onto the front end of the tool body and onto which a bit for working a workpiece is detachably mounted, a bit accommodating portion having an opening formed on a surface portion of the tool body and being adapted to accommodate a spare bit, and a bit holding member, having an elastic property, disposed in the bit accommodating portion for elastically holding the spare bit accommodated in the bit accommodating portion. The bit accommodating portion is formed as a recessed portion extending along a longitudinal direction of the tool body and having a length suitable for the accommodation of the spare bit.

Abstract: An electric drill's chuck key holding device is made up of an L-shaped chuck key receiving groove which comprises a first recess formed across the upper junction of the two half-housings of the drill body, and a second recess extended from the first recess in such a manner that it is perpendicular to the first recess. The two recesses receive an L-shaped chuck key. The first and second recesses have rubber members in such a manner that the rubber members protrude therein, thereby to positively hold the chuck key in the L-shaped chuck key receiving groove.

Abstract: A socket for a battery to be charged and connected to a charger circuit. Two terminal plates, connected to the charger circuit, are inserted into two side recesses and a bottom recess of a pusher members. Two socket body members pinch the pusher member and the terminal plates in lateral notches of the socket body members. The battery is inserted into a top hole of the assembled socket and electrically contacts the terminal plates.