BACKGROUND

Technical Field

The present application relates to an indoor illumination lamp to be attached to an interior ceiling of a vehicle.

Related Art

Various indoor illumination lamps to be attached to an interior ceiling of a vehicle have been proposed (see JP 2007-066630 A and JP 4831097 B). A conventional example of such an indoor illumination lamp includes a housing to be attached to an interior ceiling of a vehicle, a switch knob provided on a lower face side of the housing, a lens provided on the lower face side of the housing, and a light emitting diode arranged in the housing.

Irradiation light from the light emitting diode causes the lens to emit light, and the vehicle interior is irradiated with the light.

In a case where the lens is an interior light lens, it is necessary to cause the entire area of the lens to emit light as evenly as possible. Therefore, a plurality of light emitting diodes is arranged, or a light guide plate is integrally arranged inside the interior light lens.

SUMMARY

However, the cost is increased in a case where a plurality of light emitting diodes is arranged, and the structure becomes complicated in a case where a light guide plate is integrally provided inside the lens. It is therefore required to cause the entire area of the lens to emit light as evenly as possible without arranging a plurality of light emitting diodes, that is, increasing the light emission volume of light emitting diodes, and without integrally arranging a light guide plate on the inner side of the lens.

Consequently, the present application has been made with the aim of solving the above problem, and an object of the present application is to provide an indoor illumination lamp, which can cause the entire area of the lens to emit light as evenly as possible without increasing the light emission volume of the light source and without using a light guide plate.

An indoor illumination lamp according to an aspect of the present application includes a housing to be attached to an interior ceiling of a vehicle and provided with an opening, a lens arranged at the opening of the housing, a chamber provided in the housing and surrounding the opening where the lens is arranged, a light emitting diode arranged at a corner of the chamber and capable of emitting light toward the lens, and a reflector arranged on an inner face in the chamber.

With the indoor illumination lamp according to the aspect of the present application, it is possible to cause the entire area of the lens to emit light as evenly as possible without increasing the light emission volume of the light source and without using a light guide plate.

