Abstract: An adjusting and positioning structure for handle bars of trunks and the like including a securing tube assembly fixedly mounted on one side of a trunk. The securing tube assembly is hollow and is axially, pivotally provided with a handle bar in a slidable manner. At least one positioning pin urged against by an elastic element is fixedly provided in a radial parallel position of the handle bar. A control pin likewise subjected to the urging action of an elastic element is disposed below the positioning pin in a parallel position. One side of the control pin has a limiting portion capable of controlling axial displacement of the positioning pin. The securing tube assembly is radially provided with a plurality of axially spaced positioning portions corresponding respectively to the positioning pin and the control pin for receiving the positioning pin and the control pin inserted therein.

Abstract: An intravenous metering device having automatic stopper comprises a connecting tube that can be inserted into a liquid bottle at one end such that a fluid communication therebetween can be establish. The transfusion tube being connected to a liquid barrel that has a relative larger diameter and is adjacent to the liquid bottle. The liquid barrel serves a buffering device in which the liquid from the bottle is firstly and temporary stored thereof. The second end of the transfusion tube is connected with a catheter that can be punctured into the vein of patient. A regulating device being enveloped onto the transfusion tube at suitable position. Characterized in that the junction between the lower end of the liquid barrel and the upper end of the transfusion tube is formed with a cone-shape recess in which a valve that can be axially engaged thereof is disposed. The valve is floated over the liquid surface of the liquid barrel. The lower end of the valve is provided with a cone-shape stopper.

Abstract: A side release buckle is composed of a female part and a male part. The female part has a compressive device consisting of a spindle, a compression spring, and a wedge-shaped element. The male part has two latching elements and two locking elements and is capable of reaching a preset depth in the course of buckling action such that the locking elements come into contact with the wedge-shaped element of the compressive device of the female part, and that the locking elements move apart by the slope of the wedge-shaped element so as to move in a curving form until the locking elements press against the latching elements, and further that the male part and the female part are buckled.