Music – Instruments – Automatic
Reexamination Certificate
2001-02-08
2001-11-27
Hsieh, Shih-Yung (Department: 2837)
Music
Instruments
Automatic
C084S094200, C084S095100, C084S095200
Reexamination Certificate
active
06323404
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a music box device which plays a vibration plate with pins provided on surface of a rotary drum.
BACKGROUND
A conventional music box, as indicated in U.S. Pat. No. 4,557,173, includes a KOUBAKO (a spring storage box) storing therein the spring, a rotary drum driven in one direction in accordance with release of stored force of the spring, a sound vibration valve (hereinafter referred to as only vibration plate) sounding while being played with engaging pin provided on the surface of the rotary drum, a governor mechanism for rotating the rotary drum with fixed speed, gear train for coupling the governor mechanism and the spring. Such functional members described-above are mounted directly on a casting metallic frame made of zinc die casting or iron or so forth. Further, a member which includes a part of supporting section of gear train and one side of bearing section that supports a governor rotating body, which member leads a braking section of the governor mechanism from the spring storage box, is formed with synthetic resin in a body.
However, since the bearing section which supports rotary members such as the governor rotating body and respective gears and so forth is integrated with the frame concentrically, shape of the frame becomes complicated, so processing is difficult. Further, a casting metal such as a zinc die casting and so forth to be material of the frame has large coefficient of friction. Accordingly, when a rotary member which rotates in high speed is supported directly on the frame, rotation transfer efficiency of the gears deteriorates, thus the spring with small stored capacity of driving force becomes disadvantage.
So, it is an object of the present invention to provide a music box device in which a bearing section of a rotary member is formed with synthetic resin separately from the frame so as to improve a rotation transfer efficiency of a gear, and in which a spring, a gear train, and a governor mechanism are configured as one body unit to facilitate installation for the frame.
DISCLOSURE OF INVENTION
The music box device concerning the present invention, whose spring drive mechanism and governor mechanism are constituted as a supporting unit formed from a pedestal made of synthetic resin, which is supported independently to be separated from a base frame, therefore, in a few chances, fault of the base frame affects the supporting unit. Thus it is capable of improving drive performance of the music box. Further, when individual fault portion or repair portion in the drive mechanism, the governor mechanism and so forth occurs, partial exchange in every unit becomes possible, thus management cost for repair can be reduced. Furthermore, assembling in every unit of the drive mechanism, the governor mechanism and so forth and parts management become easy, thus it is capable of scheming improvement of production efficiency. In particular, it becomes possible to execute production in every unit of the drive mechanism, the governor mechanism and so forth as well as final assembling to the music box device in the optimum production area respectively, thus it is capable of reducing production cost.
Further, since a bearing section for supporting a speed increasing gear train of the governor mechanism and a governor rotating body is made of synthetic resin as a part of a supporting unit, friction loss of a bearing is reduced, thus it is capable of transferring stored force of a spring in high efficiency without loosing en route for transferring, therefore, it is capable of extending a performance time of the music box.
On the other hand, there is provided a hooking member with which a pedestal and a pedestal housing are engaged in the neighborhood of a transfer gear to prevent separation of a contact close section of U-shaped opening supporting section caused by torque of a rotary drum, and outer periphery of opening section of a spring storage section is formed continuously, further strengthening opening section of the spring storage section while covering the opening section with cylindrical convex edge of the pedestal. Even though the supporting unit is made of synthetic resin, it is capable of preventing deformation caused by repulsion force of the spring, accordingly, it is capable of securing sufficient strength capable of withstanding load caused by spring driving.
REFERENCES:
patent: 315774 (1885-04-01), Hakins
patent: 4557173 (1985-12-01), Isaka
patent: 5543577 (1996-08-01), Zhu et al.
patent: S61-18557 (1986-06-01), None
patent: S63-35100 (1988-03-01), None
patent: S63-264792 (1988-11-01), None
patent: H8-50476 (1996-02-01), None
patent: H8-221057 (1996-08-01), None
patent: H8-248951 (1996-09-01), None
Hsieh Shih-yung
Reed Smith LLP
Sankyo Seiki Mfg. Co. Ltd.
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