A vehicle headlamp includes a reflector unit including plural reflectors connected to each other, and base portions to which the reflectors are connected respectively, plural light-source units disposed on the base portions for the respective reflectors, plural heat radiation members disposed on the respective light-source units. The base portions are provided with plural heat radiation member fixing ribs extending to a side opposite to the reflectors. The heat radiation members are formed with plural heat radiation member fixing holes having a diameter larger than that of the heat radiation member fixing ribs. Each of the heat radiation member fixing ribs is inserted through the respective one of the heat radiation member fixing holes and thermally crimped such that a gap is formed between an inner peripheral surface of the heat radiation member fixing hole and an outer peripheral surface of the heat radiation member fixing rib.

The present techniques provide a novel electrolyzer and methods for welding components of such electrolyzers. The techniques may use conductors, such as resistance wires, placed in paths around the internal structural features and edges of the components. The conductors may be incorporated into the components during manufacture by injection molding, or other molding techniques, or may be tacked or otherwise applied to the surface of the components after manufacture. When current, a field or other excitation is applied to the conductors, the plastic surrounding the wire is melted. If this plastic is in direct contact with an adjoining component, a strong, hermetic seal may be formed between the two components, including the internal structural features.