H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
H01R33/945—Holders with built-in electrical component
H01R33/96—Holders with built-in electrical component with switch operated by engagement or disengagement of coupling
H01R33/962—Holders with built-in electrical component with switch operated by engagement or disengagement of coupling for screw type coupling devices