Abstract: A music box includes a bed plate, a vibration plate, a plurality of projections, and a flange part. The vibration plate has one end portion fixed to the bedplate and another end portion provided with a plurality of vibration reeds extending in a first direction. The plurality of projections is configured to contact the plurality of vibration reeds and corresponds to the plurality of vibration reeds. The flange part protrudes from the bedplate in the first direction and confronts the plurality of vibration reeds.

Abstract: A geared motor may include a connector, a motor, a deceleration mechanism, an output shaft and a circuit board. The output shaft may include a rotation transmitted part driven by the deceleration mechanism, an external connection part which is disposed apart from the rotation transmitted to be connected with an external member, and a small diameter part formed between the rotation transmitted part and the external connection part. A part of the circuit board is disposed in a space between the rotation transmitted part and the external connection part, and an insertion opening of the connector is opened in a direction that the rotation transmitted part is disposed with respect to the external connection part.

Abstract: A geared motor may include a connector, a motor, a deceleration mechanism, an output shaft and a circuit board. The output shaft may include a rotation transmitted part driven by the deceleration mechanism, an external connection part which is disposed apart from the rotation transmitted to be connected with an external member, and a small diameter part formed between the rotation transmitted part and the external connection part. A part of the circuit board is disposed in a space between the rotation transmitted part and the external connection part, and an insertion opening of the connector is opened in a direction that the rotation transmitted part is disposed with respect to the external connection part.

Abstract: An acoustic device having a sound volume control is provided. The device includes a sound generating body and a resonator having a mount member to which the sound generating body is mounted. According to the invention, a sound control member is provided to control the transmission of sound from the sound generating body to the resonator to control the sound volume. In one aspect, the sound control member is capable of adjusting a contact pressure between the sound generating body and the mount member to vary the sound volume more precisely.