To provide a support device having preferable operability. A music stand includes a support body supporting a music. A movable body is provided at a support column of the support body to be movable. A fixed body is provided at a lower end portion of the support column. A leg body is fitted to the movable body to be rotatable. The fixed body and the leg body are connected with a connection body. The movable body has three leg fitting projections arranged in a peripheral direction of the movable body main body part. The leg body has facing portions separately facing each other with the leg fitting projection interposed.

A collapsible tray table is provided. The collapsible tray table is adapted for use in confined seating situations. The collapsible tray table is movable between a collapsed condition and at least one operable condition. The collapsible tray table may have one or more tray legs and one or more second leg portions that depend from a tray top. The tray legs and second leg portions are interchangeable for providing different operable conditions and thus elevations of the tray table relative from its footing. The tray legs and second leg portions are adapted to removably connect to the underside of the tray table in a collapsed condition, thereby minimizing the low profile of the assembly in crowded seating arrangements. The collapsible tray table may provide handles and a carrying strap for facilitating transportation and manipulation of the tray table while in use.

A fixing member includes a supporting member that supports a first bar member in the longwise direction thereof; a pivoting member that has an opening portion that the first bar member penetrates and that is attached to the supporting member to freely pivot about a rotation axis that is perpendicular to the longwise direction of the first bar member; and a fastening member that causes the pivoting member to pivot centered on the rotation axis, in which the pivoting member does not make contact with the first bar member when in a first position; the pivoting member makes contact with the first bar member when in a second position; and the fastening member fixes the pivoting member to either the first position or the second position.

An assembly includes a threaded male connector, a threaded female connector, and an adapter configured to be threadably connected to each of the threaded male connector and the threaded female connector. The adapter is configured such that at least one of the threaded male connector and the threaded female connector can be disconnected from the adapter by rotating a portion of the adapter relative to the threaded male connector and the threaded female connector while holding the threaded male connector and the threaded female connector positionally fixed relative to one another.

To provide a support device having preferable operability.

A music stand includes a support body supporting a music. A movable body is provided at a support column of the support body to be movable. A fixed body is provided at a lower end portion of the support column. A leg body is fitted to the movable body to be rotatable. The fixed body and the leg body are connected with a connection body. The movable body has three leg fitting projections arranged in a peripheral direction of the movable body main body part. The leg body has facing portions separately facing each other with the leg fitting projection interposed.

A holder to support music equipment on music stands is disclosed. The holder includes a back plate and a front panel joined by a base ledge for supporting a music equipment therebetween, the back plate having a set of mounting structures that reversibly secure the back plate to a support structure of a music stand. The set of mounting structures includes one or more magnetic members fastened to the back plate, for magnetically securing the back plate to the support structure of the music stand.

A column stand for holding items comprising one or more clamps attached to the column stand, each clamp having slots in the top of the clamp, one or more trays, each tray fixedly attached to a bar, each bar fitting into a slot, a clasp attached to the top of each clamp, each clasp holding each bar to the clamp.

A column stand for holding items comprising one or more clamps attached to the column stand, each clamp having slots in the top of the clamp, one or more trays, each tray fixedly attached to a bar, each bar fitting into a slot, a clasp attached to the top of each clamp, each clasp holding each bar to the clamp.