Single sided power supply device of a lamp structure

A single sided power supply device of a lamp structure, comprising:

• a case including a housing structure with a hollow part, and a portion of the surface of the case including an opening part penetrated through to the hollow part;
• a light emitting part including a plurality of light emitting elements, and the light emitting elements installing on the surface of the case;
• a power supply, as the main power source of the entire structure.
• an electrical circuit, mainly for electrically connecting the light emitting part to the power supply, wherein, the electrical circuit comprises a first electrical terminal and a second electrical terminal, the first electrical terminal and the second electrical terminal forming an open circuit in between;
• a sliding element installing inside the case and restricting in between a first position and a second position;
• an extension part, one end of the extension connecting to the sliding element and the other end extending through the opening part and protruding out the surface of the case;
• and
• a spring element, as a mechanical element with elastic recovery force, the spring element being a conductive, material, one end of the spring element affixing to the case and electrically connecting to the first electrical terminal of the electrical circuit and the other end of the spring element securing to the sliding element;
• wherein the sliding element can select a state of close circuit state or open circuit state between the first electrical terminal and the second electrical terminal, in which, the close circuit state being a state of the sliding element connected to the second electrical terminal, the open circuit state being a state of the sliding element disengaged from the second electrical terminal;
• the first position corresponding to the open circuit state selected by the sliding element and the second position corresponding to the close circuit state selected by the sliding element;
• and the protruded position of the extension part relative to the surface of the case corresponding to one position of the first position and second position of the sliding element.