In a mirror-angle adjusting arrangement, at least one adjusting member is arranged between a surface formed on a mirror support structure and a mirror. The adjusting member is reciprocatively movable along the surface while contacting mirror in such a fashion that the angle of the mirror with respect to the surface varies upon movement of the adjusting member.

A mirror angle adjustment structure is provided for an optical system, such as a laser scanning unit. The structure comprises a support projection projected from a mirror support member at a position corresponding to an end along the lengthwise direction of the mirror, an adjustment screw member disposed at the other end of the mirror corresponding to another end across the mirror and passed through and threaded with the mirror support member from the side where the mirror is disposed, and an urging mechanism, such as a leaf spring, for urging the mirror towards the support projection and the adjustment screw member.

An adjustable mirror assembly includes a rigid base plate (35) and a mirror (16) which is integrally bonded thereto via an elastic layer (50), and adjustment screws (52, 54) that are threaded in the base place and press on the rearside of the mirror, thereby stretching the elastic layer (50).

A repair kit for repair and retrofit of an adjustable side view mirror for vehicles having four pliable mounting-bracket assemblies, each having a mirror-engaging adjustment screw for engaging and adjusting the position of the side view mirror within a mirror casing. The kit also includes four pieces of double-sided adhesive tape, each for securing and mounting each of the mounting-bracket assemblies to the inside surface of the mirror casing. Each of the mounting bracket assemblies also has a base member with a bottom surface for adhering one side of the double-sided adhesive tape thereto.

A self-locking screw (30) assures uniform mating and locking between its threads (64) and those (70) of an article (68) into which the screw is threaded. A head (34) includes a central portion (54) and an annular outer portion (52) which surrounds the central portion and which carries the screw threads on its periphery. Slots (18) extend through the head to a base (32) to segregate the head into segments (40). Annularly configured joints (60) respectively join the segments of the outer portion to the central portion and include tubular openings (56, 58) which extend from the joints and which are positioned between the segments of said central and outer portions. A hole (42) including cylindrical (44) and conical (46) portions respectively extend through the base and the head, and from the tubular hole portion and through the head. A bolt (72), including a cylindrical shaft (74) and an enlarged head (76) with a conical surface (78) which joins said head to said shaft and which engages the conical hole portion, first pivots both the central portion and the outer portion segments as a unit about the base to initially lock an upper portion of the screw threads and the article threads together, and then pivots the outer portion segments with respect to both the central portion segments and the base as a unit to lock together the remaining screw threads with substantial uniformity and the threads of the article.