Abstract: A combined structure of a column includes a plurality of main steel bars, a consecutive stirrup, and a plurality of tie bars. The plural main steel bars are arrayed to form an inner confined region and an outer confined region surrounding the inner confined region. Further, the consecutive stirrup proceeds with a consecutive turning and surrounding along the inner confined region and the outer confined region, and surrounds a region in the consecutive stirrup of the inner confined region so as to form a column core. As such, a complete confinement can be provided for the main steel bars, so as to effectively prevent the main steel bars from buckling, such that the performance of seismic resistance for the columns can be enhanced.

Abstract: A combined structure of the combined bundle of columns in the column includes a plurality of main steel bars, a one-drawing consecutive stirrup, and a plurality of tie bars. The plural main steel bars are arrayed to form an inner confined region and an outer confined region surrounding the inner confined region. Further, the one-drawing consecutive stirrup proceeds with a one-drawing consecutive turning and surrounding along the inner confined region and the outer confined region, and surrounds a region in the one-drawing consecutive stirrup of the inner confined region so as to form a column core. As such, a complete confinement can be provided for the main steel bars, so as to effectively prevent the main steel bars from buckling, such that the performance of seismic resistance for the columns can be enhanced.

Abstract: A head circumference adjustment device of a helmet includes: a main body formed with a cavity; an annular strap having a first end and a second end passing through the cavity, each of the first and second ends being formed with a rack section, a thumb section and a shoulder section; and a controller mounted in the cavity. The controller has a gear engaged with the rack sections of the strap. By means of rotating the controller, the position of the strap can be adjusted to adjust the head circumference. The head circumference adjustment device can be easily operated and truly fixed to overcome the shortcomings existing in the conventional adjustment device that the strap is likely to slip and the position of the strap can be hardly truly adjusted and the strap is likely to detach from the adjustment device.

Abstract: A head circumference adjustment device of a helmet includes: a main body formed with a cavity; an annular strap having a first end and a second end passing through the cavity, each of the first and second ends being formed with a rack section, a thumb section and a shoulder section; and a controller mounted in the cavity. The controller has a gear engaged with the rack sections of the strap. By means of rotating the controller, the position of the strap can be adjusted to adjust the head circumference. The head circumference adjustment device can be easily operated and truly fixed to overcome the shortcomings existing in the conventional adjustment device that the strap is likely to slip and the position of the strap can be hardly truly adjusted and the strap is likely to detach from the adjustment device.

Abstract: A baseball batter's helmet includes a shell; a protective padding including crown and arcuate pads; an adjustment assembly including a split ring including two elongate end openings, a first toothed section formed on a top edge of one opening, a second toothed section formed on a bottom edge of the other opening, a rear plate including a recess having a toothed member and a transverse channel with the openings inserted thereinto to form a crossing relationship, a disk including a gear meshed with the toothed sections, and two opposite hooks engaged with the toothed member, and a rotatory knob mounted on the shell and secured to the disk, the split ring, and the rear plate; and a knob protector. Clockwise turning the knob to cause the openings to move toward each other by activating the gear mechanism will tighten the crown pad to decrease a diameter of the arcuate pad.