Abstract: A press-control retaining device includes a casing, the casing having two engagement flanges disposed at two sides, a retainer member supported on a spring inside the casing and adapted for securing to an external object, the retainer member having a substantially -shaped bottom positioning base supported on the spring and two springy arms upwardly outwardly extended from the bottom positioning base and adapted for clamping on an external object, the bottom positioning base comprising two first hooked portions bilaterally disposed at a bottom side, two stop flanges bilaterally disposed at a top side, and two second hooked portions respectively spaced between the first hooked portions and the stop flanges, and a slide coupled to the retainer member between the stop flanges and the second hooked portions.

Abstract: A belt lock includes a casing, the casing having a serrated engagement portion and a bearing portion respectively disposed at a bottom wall thereof at a top side, and two parallel upright side walls at two sides of the bottom wall, and a locking unit pivoted to the upright side walls of the casing and adapted to lock a belt being inserted through the casing, the locking unit including a handle pivoted to the casing and turned between a locking position and an unlocking position, and a sector-like swivel pressure block pivoted to the handle, the handle having two barrels bilaterally disposed at a front side thereof and respectively pivoted to the pivot holes of the upright side walls of the casing, the swivel pressure block having a serrated engagement portion adapted for pressing on the inserted belt against the bearing portion of the casing when the handle is turned to said locking position.

Abstract: An adjustable buckle device used in conjunction with a strap or the like for holding an object firmly in position is provided. The buckle device includes a buckle body fixed to one end of the strap and a ratchet member fixed to the other end of the strap for firmly releaseably engagement with the buckle body. The buckle body has a base and a locking plate pivotally coupled to the base for firmly engaging with the ratchet member. The locking plate is formed with a stopper for stopping the ratchet member from being released from the buckle body after the ratchet member enters and passes through the buckle body. The locking plate also allows the disengagement of the buckle body and the ratchet member to be conveniently operated by simply lifting up the locking plate.

Abstract: A fastener having a body defining an axis of rotation extending downwardly from the body and formed integrally therewith is provided with a flange extending radially and downwardly from the body. The flange is slotted to define a plurality of deformable tabs joined at their respective bases to the body. At least a portion of each tab is twisted relative to its base about an axis extending along the flange radially from the axis of rotation in a direction so that the leading edge of each tab as defined by the slots, the edge being on the side of the tab facing in the direction of rotation of the fastener for tightening, projects downwardly.

Abstract: A screw having a head and a body defining an axis of rotation extending downwardly from the head and formed integrally therewith is provided with a flange extending radially and downwardly from the head about the upper end of the body. The flange is slotted to define a plurality of deformable tabs joined at their respective bases to the head. At least a portion of each tab is twisted relative to its base about an axis extending along the flange radially from the axis of rotation in a direction so that an edge of each tab defined by the slots, the edge being on the side of the tab facing in the direction of rotation of the screw for removal, projects downwardly. The respective ends of the edge lie in essentially a single plane extending normally to the axis or rotation, the bottom surface of the tabs defining an essentially straight line in radial cross-section except in the region of twist.