| 摘要 |
A lighting device includes: a light source module 1; a heat dissipation section 2 accommodating a power-source circuit section 7 for driving the light source module 1; and a base 4 provided on one end side of the heat dissipation section 2, wherein a cavity is formed in each of the heat dissipation section 2 and the base 4, and a gas layer exists around circuit components such as a power-source circuit component 72 and a heat generation component 73 of the power-source circuit section 7, and at least the cavity of the base 4 is filled with a thermosetting resin 5. Therefore, the strength of the base 4 can be increased, and a connection component such as an electric wire 46 connected to the base 4 can be retained. Consequently, breakage of the components occurring when the lighting device is dropped can be prevented. The circuit components are not covered with the thermosetting resin 5, thus preventing breakage of the circuit components or disconnection or the like of the electric wire, caused by stress produced in accordance with a difference between coefficients of thermal expansion. |
