Abstract: A retractable post assembly with alarm function is disclosed. The retractable post assembly includes: a stationary post being a column member; a moveable post being a column member and moveably sleeved with the stationary post; and an alarm device, such as an air whistle, an electrically-controlled buzzer unit, and an electrically-controlled alarm lamp unit, installed in the retractable post assembly at a proper location. When the moveable post is making a relative movement with respect to the stationary post, the alarm device senses the movement and raises an alarm accordingly.

Abstract: A retractable post with an alarm device includes a plurality of retractable pipes retractably sleeved with each other. A retractable air whistle is secured by a latch block at a proper location inside the retractable pipe. A plug piece is installed at a bottom of the retractable post. The plug piece and the latch block make an interior of the retractable pipe present a dummy seal state, wherein the retractable pipe is almost but not completely sealed. When an abnormal rapid falling displacement of the retractable pipes occurs, the latch block and the retractable air whistle compress the air inside the retractable pipe, and then a bellow of the retractable air whistle is further compressed, such that the air inside the bellow is rapidly discharged through a sounding valve disposed at a front end of the air whistle, thereby generating an alarm sound.

Abstract: A photographic reflector includes an engagement unit, a support frame, a fabric canopy, and a lamp holder. The engagement unit includes an engagement seat and an engagement member moveably mounted in the engagement seat. The support frame includes a plurality of ribs and a plurality of stretchers corresponding to each respective rib. One end of each rib is pivotally connected to the engagement seat. One end of each stretcher is pivotally connected to a preset location of the corresponding rib, and the other end of each stretcher is pivotally connected to the engagement member. The fabric canopy is mounted on the ribs of the support frame and has a reflective layer at an inside thereof and a mounting hole defined at a location close to the engagement unit. The lamp holder is mounted in the mounting hole of the fabric canopy. The photographic reflector can be folded as compactly as desired, easily stored, and convenient in transportation and use.

Abstract: Provided is a tripod structure of a stand, which is combined on a central post of the stand and allows the leg units of the stand to be folded, and includes: an upper tripod unit having a central post orifice and at least three leg unit connection parts evenly arranged at the outer periphery of the central post and formed with at least an accessory part, wherein the upper tripod unit is fastened at a preset location of the central post of the stand via the central post orifice, and each leg unit of the stand is respectively hinged with each leg unit connection part; and a lower tripod unit having a post plug and at least three moveable support rod connection parts evenly arranged at the outer periphery of the post plug, and each moveable support rod connection part is correspondingly formed with a leg unit buckling part and formed with at least an accessory part, wherein the post plug is installed at the distal end of the central post of the stand, and hinged to the leg unit and the moveable support rod conne