A supporting device is adapted for mounting a protective cover to shield a cutting blade of a cutting machine, and includes a mount unit with a proximate tightening surface, a tightening bolt passing through the proximate tightening surface, a supporting frame adapted for holding the protective cover and having a guiding slot for passage of the tightening bolt so as to be movable between a position of use and a retreat position, a movable tightening member with a distal tightening surface and a cam follower surface, a cam actuating member having a cam surface mating with the cam follower surface and turnable to tighten or loosen the supporting frame, and a biasing member disposed to keep the actuating body in a tightening position.

An elliptical machine includes: a machine body including a first support structure, and a second support structure extending upwardly from the first support structure; left and right cranks mounted rotatably to the first support structure and rotatable about a first rotation axis; a swing unit including left and right rotary shafts mounted rotatably and respectively to opposite sides of the second support structure, and left and right handles mounted respectively to the left and right rotary shafts, the left and right rotary shafts being respectively rotatable about second and third rotation axes, each of which is inclined to a line parallel to the first rotation axis; and a pedal unit including left and right pedal rods, each of which is connected rotatably to a respective one of the left and right handles and a respective one of the left and right cranks.

A protective cover device includes a supporting member secured to a worktable of a sawing machine, a cantilever having rear and front pivot ends pivoted to the supporting member and a cover shield by rear and front journal pins, respectively. At least one of the rear and front journal pins is movable relative to a corresponding one of the rear and front pivot ends between a latched position, where a respective one of the rear and front journal pins pivotally secures a corresponding one of the rear and front pivot ends to a corresponding one of the supporting member and the cover shield, and a released position, where the respective one of the rear and front journal pins is clear of the corresponding one of the supporting member and the front pivot end by being withdrawn therefrom.

A circular sawing machine has a multi-directional adjustable laser indication device that includes a body, a support rod disposed rotatably and movably within the body, and a laser lamp fixed on the support rod so as to form a visual indication line on a worktable. An angle-adjusting unit is operable to rotate the support rod so as to adjust the angle of the laser lamp. A transverse adjusting unit is operable to move the support rod within the body along a transverse direction of the worktable so as to adjust the position of the laser lamp.

A foldable frame assembly includes a base frame having a wheel-carrying end for mounting a wheel unit, a handgrip end, and an intermediate portion connected to a prop member so as to lift the base frame to a standing position. A tabletop has a front tabletop end pivoted to the intermediate portion for suspending a machine above the ground surface so as to enable a rear tabletop end to turn from a working position to a folded position. A bracing member has an anchoring end pivotally mounted on the wheel-carrying end, and a slidable end coupled with the rear tabletop end such that when the rear tabletop end is turned from the working position to the folded position, the slidable end is turned to be close to the intermediate portion. A rear locking unit is disposed to guard against movement of the slidable end.