JP2525814Y2 - Music box with rocking device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a music box with a rocking device.

[0002]

2. Description of the Related Art A cam integrated with a gear rotated by a drum of a music box movement is provided, and a swinging arm engaged with the cam is swingably supported on a support plate fixed to a frame, so that the cam can rotate. A music box with a rocking device for rocking the rocking arm with the rocking arm is already well known. When a decoration such as a doll is attached to the swinging arm and the music box is played, the doll moves along with it. For example, a music box with a rocking device described in Japanese Utility Model Laid-Open No. 1-19196 is that.

[0003]

The music box with a rocking device described in the above-mentioned publication has a feature that a special type of music box can be obtained at a low cost by retrofitting the assembled standard type of music box movement. There is only one swing arm, and only one ornament can be attached. Further, even when a plurality of ornaments are attached, these movements are the same, and there is a problem that the operation lacks interest. Further, since the rotation of the drum is taken out through the gear, there is a problem that the efficiency of the rotation transmission is low.

[0004] Therefore, an object of the present invention is to provide a music box with a rocking device that can change the movement of a decorative item and that is efficient in transmitting rotation.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a music box with a rocking device that rotates a drum with full opening force and plays a tune by playing a vibration valve.
A cam having a cam surface having irregularities with different depths and / or pitches on a peripheral edge, a support plate fixed to a music box movement, and supported swingably on the support plate,
A plurality of rocking arms each of which is engaged at a different position on the cam surface.

[0006]

When the drum rotates and plays the music box by playing the vibrating valve, the plurality of swing arms engaged by the cam rotating integrally with the drum swing independently of each other, and each swing arm Behaves differently.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

First, a common configuration of each embodiment will be described. In FIG. 1 and FIG. 2, a music box movement 1 has a well-known structure, and its frame 2 has
The whole dance storage box 3 is fixed, and the drum 4 is rotated by the release force of the whole dance (not shown). This drum 4
Plays a tune by playing the vibration valve 5. The speed of the drum 4 is regulated by the governor mechanism 6 and is rotated at a substantially constant speed.

As shown in FIG. 5, the drum 4 has one end plate 4c integrally formed with a gear 4a meshing with a gear 3a provided in the whole box 3, and a gear 4b connected to a governor mechanism. , The other end plate 4d, and a drum body having these end plates fitted at both ends. Drum 4
The shaft portion 4e of the end plate 4c is supported by being pressed by a part 3b of the whole box, and the shaft hole 4f formed in the end plate 4d is rotatably supported by engaging with a hollow bearing 7. I have. Bearing 7
Is caulked and fixed to the bearing 1a of the frame 2 (see FIG. 2).

An engagement hole 4ca having a projection directed in the centripetal direction is formed inside the center of rotation of the end plate 4c.
On the other hand, a plurality of elastic engagement arms 4da are formed inside the bearing hole f of the end plate 4d. An output shaft 8 is inserted into the drum 4 via a hollow bearing 7. At the tip of the output shaft 8, an engagement projection 8a that engages with the engagement hole 4ca to unify the rotation direction and an inward projection 4db of the engagement arm 4da prevents axial movement. A retaining groove 8b is formed.

The end 8 of the output shaft 8 protruding from the bearing 7
The cam 9 is press-fitted and fixed to c. This cam 9
Are formed on the periphery with shallow irregularities, deep irregularities, long pitch irregularities, and short pitch irregularities. The profile of the cam 9 is appropriately selected in accordance with a desired movement of the swing arm described later.

Referring to FIG. 1, the first embodiment will be described in detail. A support plate 10 bent in a U-shaped cross section is fixed by caulking to a portion of the frame 2 adjacent to the drum 4. The base ends 11a and 12a of the two swing arms 11 and 12 are rotatably inserted into the pair of support arms 10a and 10b, respectively.

The lower swing arm 11 is positioned so as to be able to engage the cam 9 with an operating portion 11b projecting from the support arm 10a and bent into a crank shape. A torsion spring 11c is wound around the base end portion 11a of the swing arm 11, and gives the swing arm 11 a swing behavior in which the operating portion 11b is engaged with the cam 9. . The free end 11d of the swing arm 11 extends to the upper part of the governor mechanism 6, and a decoration (not shown) is attached to the free end 11d. Swing arm 1
The engagement with the first cam is provided on the swing arm and / or the swing arm.
The weight of the ornament to be used may be used.

The upper swing arm 12 has an operating portion 12b formed by bending a portion drawn from the support arm 10a into a crank shape. The operating portion 12b is formed by the elasticity of a torsion spring 12c wound around the base end portion 12a.
The swing behavior of the direction in which the cam 9 is engaged is provided. The free end 12 d of the swing arm 12 extends to the upper side of the vibration valve 5.

When the whole dance is wound up and released, the drum 4 rotates and flips the vibration valve 5 to play a predetermined tune. When the drum 4 rotates, the output shaft 8 integral therewith rotates to rotate the cam 9. When the cam rotates,
The swing arms 11 and 12 engaged with the peripheral edge of the swing arm are swung against the respective springs.

The swing of the swing arm 11 and the swing arm 12 is controlled by the cam 9.
Are independent of each other according to the cam profile due to the different positions of the arms engaging the. That is, when the operating portion falls into the deep concave portion of the cam, the free end of each swing arm lowers to the lowest position as shown by reference numerals 11L and 12L. As shown, it rises to the highest position, swings in small increments when engaged with a short pitch portion, and slowly swings when engaged with a long pitch portion.

In this case, the swing periods of the swing arm 11 and the swing arm 12 are shifted from each other, and moreover, the base ends 11a, 12a
If the ratio of the length from the base to the free ends 11d, 12d and the length from the base end to the free ends 11d, 12d is changed, the decorations attached to the respective free ends move separately from each other.

The drum 4 is supported by a support structure having the highest rigidity in the music box movement, and the cam 9 provided integrally with the drum 4 rotates with a large torque to surely swing the swing arm. Can be moved.

Next, a second embodiment will be described with reference to FIGS. This embodiment differs from the previous embodiment in that the support plate 1
The only difference is that the pull-out directions of the swing arms 11A and 12A supported at 0 are different. That is, the swing arm 11A and the swing arm 1
2A are pulled out from the support arms 10a, respectively, and the respective operating portions 12Ab, 12Ab are engaged with the cam 9. Also in this case, the movements of the swing arms are different from each other and independent from each other.

The ornament attached to the free end of each swinging arm is not limited to an independent object such as a doll, but may be a doll or an toy such as an animal's eyes or mouth which is movably provided. Of course, it may be a part. The position of the free end of the swing arm that is extended to the music box movement is appropriately set according to the form of the toy to be applied. Furthermore, if the swing arm is made of steel such as a thin piano wire and is extended, the movement of the free end becomes unstable,
When this unstable movement is reflected in the movement of the ornament, an interesting movement that is not periodic is obtained.

In each of the illustrated embodiments, two swing arms are provided, but if the support arms of the support plate 10 are extended, more swing arms can be supported.

[0022]

According to the present invention, the cam is rotated integrally with the drum, and a plurality of swing arms are engaged with each other at different positions on one cam surface having irregularities having different depths and / or pitches. Therefore, there is an effect that an interesting music box with a swinging device in which the swinging arms independently move differently can be obtained with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a perspective view of a music box with a rocking device according to a first embodiment of the present invention.

FIG. 2 is a plan view of a music box with a rocking device according to a second embodiment of the present invention.

FIG. 3 is a partial left side view of FIG. 2;

FIG. 4 is a front view of FIG. 2;

FIG. 5 is a sectional view showing an example of a mounting structure of a cam that rotates integrally with a drum.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Music box movement 2 ... Frame 3 ... All-move storage box 4 ... Drum 5 ... Vibration valve 6 ... Governor mechanism 7 ... Bearing 8 ... Output shaft 9 ...・ Cam 10 ・ ・ ・ Support plate 11 ・ ・ ・ Swing arm 12 ・ ・ ・ Swing arm

Claims (1)

(57) [Scope of request for utility model registration] 1. A music box that plays a tune by rotating a drum with a full open force and playing a vibrating valve, wherein the music box rotates integrally with the drum and has a depth and / or pitch around its periphery.
Each of the cam to have a cam surface of different irregularities, and a support plate fixed to the music box movement, be supported swingably by the support plate, each portion at different positions of the cam surfaces A music box with a swing device comprising: a plurality of swing arms engaged;