JPH0643698U - Electric music box - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the work of assembling an electric music box. [Structure] A vibrating plate (12) elastically repulsed by a rotating drum (10) and a reduction gear train (15) for the rotating drum (10).
A motor (26) driven via a rotary drum (1)
0), the vibration plate (12), the reduction gear train (15) and the frame (11) supporting the motor (26), the rotor shaft (32) of the motor (10).
The motor (26) is supported by the frame (11) in a direction orthogonal to the frame (11).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric music box in which a rotary drum that elastically vibrates a valve of a diaphragm is driven by a motor via a reduction gear train.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, there is known an electric music box in which a rotary drum that elastically vibrates a valve of a diaphragm is driven by a motor via a reduction gear train. The rotating drum, diaphragm, reduction gear train, and motor that make up this electric music box are supported by the frame that forms the base of the music box. The gears that make up the reduction gear train are rotatably supported by the frame by inserting their shafts into notches or bearings provided in the frame. The motor is fixed to the frame by screwing the motor base plate to the frame so that its rotor axis is parallel to the frame, that is, in a horizontal position.

[0003]

[Problems to be solved by the device]

 The motor of a conventional electric music box is fixed to the frame by screwing the motor base plate to the frame, so it is sufficient to just drop the shaft into the notch or bearing provided in the frame. Assembling the motor frame is more troublesome than the assembling, and there was a problem in the automatic assembling work of the electric music box.

[0004]

[Means for Solving the Problems]

 An electric motor having a vibrating plate having a valve that is repelled by the rotating drum, a motor with a yoke that drives the rotating drum via a reduction gear train, and a frame that supports the rotating drum, the vibrating plate, the reduction gear train, and the motor. In the music box, the motor is supported on the frame in a direction in which the rotor shaft of the motor is orthogonal to the frame.

[0005]

[Action]

 In the electric music box, the motor for driving the rotary drum is supported on the frame with its rotor shaft orthogonal to the frame, so that the motor frame is assembled in the same manner as the reduction gear train assembly. This is done by dropping the rotor shaft into a bearing mounted on the frame.

[0006]

【Example】

 In FIG. 1, reference numeral 10 is a rotating drum, which is a well-known rotary drum whose shafts are rotatably supported at both ends, and 12 is a vibrating plate having a large number of valves that are repelled by the rotating drum 10. The diaphragm 12 is fixed to the frame 11 with screws 13. A drum gear 14 is fixed to one end of the rotary drum 10, and the gear 10 meshes with the final gear 16 of the reduction gear train 15. The reduction gear train 15 includes a gear 17, a gear 18, a worm gear 19 integrated with the gear 18, a worm 20, and a gear 21 integrated with the worm 20. The gear 21 meshes with a motor gear 31 a provided on the rotor 31. The gears 16, 17, 18 and 19 are supported by dropping both ends of their shafts into recessed bearings 22, 23 and 24 (see FIG. 3) of the frame 11, respectively. As shown in FIG. 2, one end of the shaft of the worm 20 is supported by the frame 11 and the other end thereof is supported by the lid 25.

A motor 26 is arranged at a corner of the frame 11. The motor 26 is composed of a yoke 27, a pair of magnets 28 and 29 supported by the yoke 27, a rotor 31 having a commutator 30, and a brush (not shown) contacting the commutator 30. The yoke 27 is fixedly supported by being dropped into a concave portion 11a formed in the frame 11 and surrounding approximately 3/4 of the circumference of the yoke 27. The base of the brush is fixed to the lid 25. The shaft 32 of the rotor 31 is orthogonal to the frame 11, and is supported by being dropped into a cylindrical bearing 33 provided on the frame 11 like the reduction gear train 15.

To assemble the motor, the yoke 27 having the magnets 28 and 29 fixed to the inner peripheral surface is dropped into the recessed portion 11a of the frame 11, and then the shaft 32 of the rotor 31 is dropped into the bearing 33. First, the lid 25 having a brush is put on the frame 11 so that the brush comes into contact with the commutator 30. The motor bearing 33 is separate from the frame 11, but may be formed integrally with the frame 11.

[0009]

[Effect of device]

 According to the present invention, since the motor for driving the rotary drum is supported by the frame with the rotor shaft of the motor being orthogonal to the frame, the assembly of the motor with respect to the frame is similar to the assembly of the reduction gear train. This can be done by dropping the rotor shaft into a bearing provided on the frame. Therefore, the assembly work of the motor, which was performed by screwing the motor base plate to the frame, is improved, and the problems of the automatic assembly work of the electric music box are solved.

[Brief description of drawings]

FIG. 1 is a plan view of an electric music box showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view showing only the frame of the music box.

[Explanation of symbols]

 10 rotating drum 11 frame 12 diaphragm 15 reduction gear train 26 motor 27 yoke 32 rotor shaft

Claims (3)

[Scope of utility model registration request] 1. A vibration plate having a valve elastically ejected by a rotary drum, a motor with a yoke for driving the rotary drum via a reduction gear train, the rotary drum, the vibration plate, the reduction gear train and the motor. An electric music box having a supporting frame, wherein the motor is supported on the frame in a direction in which a rotor shaft of the motor is orthogonal to the frame. 2. An electric music box in which one end of a rotor shaft of the motor is supported by the frame. 3. An electric music box in which the yoke of the motor is supported by the frame.