Abstract: A composite bicycle wheel is provided with a first circumferential side wall, a second circumferential side wall and an outer bridge. The first circumferential side wall has a radial inner end and a radial outer end. The second circumferential side wall has a radial inner end and a radial outer end. The outer bridge connects the radial outer ends of the first and second circumferential side walls. At least one of the outer bridge and the first and second circumferential side walls includes a vibration suppression layer.

Abstract: A composite bicycle wheel is provided with a first circumferential side wall, a second circumferential side wall and an outer bridge. The first circumferential side wall has a radial inner end and a radial outer end. The second circumferential side wall has a radial inner end and a radial outer end. The outer bridge connects the radial outer ends of the first and second circumferential side walls. At least one of the outer bridge and the first and second circumferential side walls includes a vibration suppression layer.

Abstract: A manipulation button of a first attitude adjusting mechanism is located at a corner on a front side of a lower case. The manipulation button is operated with fingers of one hand while both corners of the front side of the lower case are supported with both hands in controlling the attitude of a projector. With the projector being stably supported it is unlikely for an inclination to occur in right and left directions approximately orthogonal with front and back direction of the projector. Workability during attitude adjustment processes of the projector are thus improved.

Abstract: A manipulation button (62) of a first attitude adjusting mechanism (27) is located at a corner on a front side of a lower case (23), so that the manipulation button (62) can be operated with fingers of one hand while both corners of the front side of the lower case (23) is supported with both hands in controlling the attitude of a projector, thereby enabling to conduct adjustment work with the projector being stably supported to make it unlikely for an inclination in right and left direction approximately orthogonal with front and back direction of the projector, thus improving workability during attitude adjustment process of the projector.