Loudspeaker device and movable-body device equipped with the same

1. A loudspeaker device used in a movable-body device including a space for housing a spare tire and a lid for closing the space, the loudspeaker device comprising:

a plurality of loudspeaker units each including a diaphragm for outputting a sound mainly in a first direction upon receiving an electric signal; and

an enclosure configured with at least a part of the lid of the movable-body device, the enclosure securing and accommodating the plurality of loudspeaker units in an inside of the enclosure, wherein

the enclosure includes:

a body part;

a plurality of accommodation parts accommodating the plurality of loudspeaker units, respectively, being formed integrally with the body part, and being larger in dimension along the first direction than the body part, the plurality of accommodation parts being equal in number to the plurality of loudspeaker units; and

a plurality of duct parts extending from the plurality of accommodation parts toward the lid, respectively, wherein

each of the plurality of accommodation parts includes:

a plate facing the diaphragm in the first direction so as to face the diaphragm; and

an acoustic space enclosed by one of the plurality of loudspeaker units and the plate, wherein

the plate is configured to propagate sound outputted from the diaphragm in the first direction toward a corresponding one of the plurality of duct parts in a direction different from the first direction, and

each of the plurality of duct parts connects the acoustic space and an inside of the movable-body device,

each of the plurality of the accommodation parts includes a side face on an inner side of the the lid,

the side face has a circular arc shape as viewed from an opposite direction to the first direction, and

the side face of each of the plurality of the accommodation parts forms a part of an identical circle as viewed from the opposite direction.

2. The loudspeaker device according to claim 1 , wherein

each of the plurality of duct parts extends in a direction different from the first direction.

3. The loudspeaker device according to claim 1 , wherein

the plurality of duct parts are disposed along an outer peripheral portion of the enclosure.

4. The loudspeaker device according to claim 1 , wherein

each of the plurality of duct parts includes a bending part configured with a curved surface.

5. The loudspeaker device according to claim 4 , wherein

an inner wall of the bending part of each of the plurality of duct parts includes an uneven surface.

6. The loudspeaker device according to claim 1 , wherein

a number of the plurality of the accommodation parts and a number of the plurality of the loudspeaker units are an equal even number.

7. The loudspeaker device according to claim 1 , wherein

a major reproduction range of each of the plurality of loudspeaker units is 300 Hz or less.

8. The loudspeaker device according to claim 1 , wherein a major reproduction range of each of the plurality of loudspeaker units is 100 Hz or less.

9. The loudspeaker device according to claim 1 , wherein

the plurality of accommodation parts communicate with the body part.

10. A movable-body device comprising:

a body;

a drive unit mounted in the body;

an amplifier mounted in the body; and

a loudspeaker device according to claim 1 , the loudspeaker device being fed with an output from the amplifier.

11. The movable-body device according to claim 10 , wherein

the body includes a housing section having an opening;

the enclosure of the loudspeaker device covers the opening of the housing section; and

the housing section includes:

a first space for housing the spare tire; and

a second space in which the plurality of accommodation parts of the enclosure of the loudspeaker device is disposed.