Abstract: An outer casing for headlights and a headlight using the outer casing can include an outer lens having an opening portion and a casing having an opening portion. The opening portion of the outer lens can include a sealing projection and a water guard rib, and the opening portion of the casing can include an end surface and a sealing concave portion. The outer lens can be attached to the casing so that the sealing projection is inserted in the sealing concave portion while the water guard rib contacts the end surface. The outer lens can be casted by a simple molding tool such that a burr is prevented from occurring on the opening portion. Therefore, the headlight using the outer casing can incorporate various lamps with an airtight structure and an adequate mechanical strength even when the outer lens is formed in a thickness of less than 2.5 millimeters.

Abstract: A metal mold for molding a lens cover can be provided without increasing the size of the metal mold or the production costs so as to prevent deterioration of production efficiency while also preventing any unfilled area or a thin thickness portion of a resin material from being formed in a final product. Also provided is a method for producing a lens cover utilizing such a metal mold. The metal mold can have a stationary mold, a movable mold and a slidable mold between them. A cavity for molding a lens sealing portion can be formed between the stationary mold and the movable mold, and the slidable mold can have a projection portion projecting into the cavity.

Abstract: An outer casing for headlights and a headlight using the outer casing can include an outer lens having an opening portion and a casing having an opening portion. The opening portion of the outer lens can include a sealing projection and a water guard rib, and the opening portion of the casing can include an end surface and a sealing concave portion. The outer lens can be attached to the casing so that the sealing projection is inserted in the sealing concave portion while the water guard rib contacts the end surface. The outer lens can be casted by a simple molding tool such that a burr is prevented from occurring on the opening portion. Therefore, the headlight using the outer casing can incorporate various lamps with an airtight structure and an adequate mechanical strength even when the outer lens is formed in a thickness of less than 2.5 millimeters.

Abstract: A metal mold for molding a lens cover can be provided without increasing the size of the metal mold or the production costs so as to prevent deterioration of production efficiency while also preventing any unfilled area or a thin thickness portion of a resin material from being formed in a final product. Also provided is a method for producing a lens cover utilizing such a metal mold. The metal mold can have a stationary mold, a movable mold and a slidable mold between them. A cavity for molding a lens sealing portion can be formed between the stationary mold and the movable mold, and the slidable mold can have a projection portion projecting into the cavity.