JPH036952Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a music box full winding device in which an intermediate gear is interposed between a full winding shaft and a full winding shaft of a music box.

[Prior art] Conventionally, in a rotating doll with a built-in music box, the entire dance axis can be placed at the center of the doll by directly screwing the shaft of the stand, which also serves as the winding key for the upper winding of the whole dance, to the eccentric position of the entire dance axis. Since the doll will rotate eccentrically when not in use, a winding gear, an intermediate gear, and a gear that rotates integrally with the whole dance axis are installed between the winding axis and the whole dance axis located at the center of the doll. A mechanism has been proposed.

However, when the winding shaft and the gear, which have general-purpose threaded parts, and the winding shaft and the winding key are screwed together with screws, the respective threaded joints bite when winding up the winding, and the direction in which the winding key is removed, i.e. When the winding shaft is rotated in the opposite direction to the winding direction, if the biting force between the winding shaft and the winding key is stronger than the biting force between the winding shaft and the gear, the gear will fall off from the winding shaft and the key will wind. I can't remove it,
There is a drawback that the gear that comes off the full axis pushes the resin bottom plate, presser plate, etc. and breaks it. In order to eliminate this drawback, all the winding shafts and gears are press-fitted together, and the hoisting shaft 18, the winding gear 19, and all the winding shafts 20 in FIG.
A structure in which a square shaft and a square hole are connected like the gear 21 is also adopted, but the square shaft and square hole are cumbersome and costly to produce, and when the winding key is removed, the force moves all the way through the music box. This causes the music box to rotate in the opposite direction to the winding direction, thereby exerting a harmful force on the music box.

In addition, as shown in FIGS. 7 and 8, in order to eliminate the above-mentioned drawbacks, an intermediate gear 22 is provided between the full winding shaft 6 and the hoisting shaft 3, and the intermediate gear 22 and the hoisting gear 8 are rotated in the opposite direction.
A system has been proposed in which the meshing of the shafts is disengaged and no rotational force is transmitted to the entire shaft 6. However, 1. When hoisting, the intermediate gear 22 moves and meshes with the hoisting gear 8 to start hoisting, so play during hoisting is unavoidable.

2. When the winding key 11, which also serves as a rear winding stand, is placed on a table or the like and the music box main body is rotated, the intermediate gear 22 and the winding gear 8 may become disengaged, and the music box main body may not rotate. It has

3. In order to eliminate the drawbacks mentioned in the previous paragraph, a new spring 23 is installed so that the intermediate gear 22 and the hoisting gear 8 do not become disengaged except when winding. However, it is difficult to assemble the spring, and the quality is not stable. There are drawbacks such as the remaining problems.

[Purpose of the invention] In view of the above-mentioned drawbacks, the present invention has been developed in view of the above-mentioned drawbacks. To propose a full winding device for a music box which prevents gears from falling off and also prevents harmful force from being applied to the music box.

[Structure of the invention] The present invention consists of a device in which the entire winding shaft of a music box is projected and connected to the winding shaft through a gear, and a gear that rotates integrally with the winding shaft is constantly meshed with the gear. an intermediate gear, a hoisting gear that constantly meshes with the intermediate gear, a hoisting shaft into which the hoisting gear is rotatably fitted, and which is provided integrally with the hoisting shaft and engages with the hoisting gear when rotated in the hoisting direction. However, it has a brake piece that is displaced in the radial direction when rotated in the opposite direction, and an abutment part that is provided integrally with the mounting plate and located in the displacement area of the brake piece.

[Example] The present invention will be explained below with reference to the illustrated example. As shown in Figures 1 to 3, the winding device for a music box has a winding shaft 3 located at the center of a mounting plate 2 formed in the shape of a disc of synthetic resin, etc., which serves as the bottom plate of the rotating doll 1, etc. The cover 4 placed on the jetty 2a of the mounting plate 2 is rotatably supported, and the boss 2b of the mounting plate 2
A music box 5 is fixed on top, and a gear 7 is screwed to a threaded portion 6a formed on the entire winding shaft 6 of the music box so as to rotate together, and a winding gear 8 is attached to the winding shaft 3.
is rotatably fitted, and a brake piece 9 is press-fitted and fixed to the lower side of the hoisting gear 8 so as to rotate integrally with the hoisting shaft 3. A part of the jetty 2a formed around the brake piece 9 is configured as an abutting portion 2c located in the displacement area of the brake piece 9. An intermediate gear 10, which is always in mesh with both gears, is rotatably supported between the gears 7 and 8 by a mounting plate 2 and a cover 4.

A screw rod 12 fixed to a winding key 11 which also serves as a stand is screwed into the threaded portion 3a on the lower side of the winding shaft 3.

As shown in FIG. 4, the music box 5 has a frame 14 fixed on the mounting plate 2 with screws 13.
The whole movement inside the barrel 15 fixed above is the whole movement axis 6.
The drum 16 is rotated by this entire drive source, and the pins of the drum strike the diaphragm 17, causing the music box to sound. The gear 7 screwed onto the full shaft 6 has a concave portion on its upper surface with a tapered portion 7a around the periphery.

As shown in FIG. 3, an arcuate protrusion 8a is formed protruding from the lower surface of the hoisting gear 8, and a tapered portion 8b and an engaging end portion 8c are formed on one side of the protrusion 8a.

The brake piece 9 has a "no" shape into which the protrusion 8a fits.
It is shaped like a letter and is displaceable in the radial direction, with sawtooth teeth 9a formed on the outer periphery and a tapered portion 9 on one side of the inner periphery.
b and a notch 9c are formed.

The operation of the above-mentioned full winding device is such that when the winding key 11 is wound up, the winding shaft 3 is rotated counterclockwise in FIG. 1, the brake piece 9 is integrally rotated clockwise in FIG. is the engagement end 8 of the winding gear 8
c and the hoisting gear 8 is rotated. This rotation is transmitted to the full dance axis 6 via the intermediate gear 10 and the gear 7, and the full dance is wound up on the full dance axis 6, and the music box 5 is played. The rotating doll 1 is rotated.

Next, when the winding key 11 is rotated in the opposite direction to the full winding direction in which the winding key 11 is removed, the brake piece 9 is rotated counterclockwise on the winding shaft 3 in the counterclockwise direction in FIG.
Since the full-length shaft 6 and the gear 7 are screwed together so that the tapered portion 7a bites into the stepped portion of the full-length shaft 6, the hoisting gear 8 is in a stopped state, and the tapered portion 9b of the brake piece 9 is in the hoisting state. Even when it hits the tapered part 8b of the gear 8, the threaded connection between the full shaft 6 and the gear 7 does not loosen, and the brake pieces 9 are displaced and expanded in the radial direction, so that the serrated teeth 9a on the outer periphery touch the outside. When engaged with the contact portion 2c, a braking force is generated and rotation is stopped. Therefore, winding key 1
The screw rod 12 of No. 1 is unscrewed from the screw portion 3a of the winding shaft 3, and the winding key 11 can be removed.

A rotational force is applied to the hoisting gear 8 when the tapered portion 9b hits the tapered portion 8b, but the tapered portion 9
When the winding shaft 3 rides on the tapered portion 8b, the rotational force decreases, so the entire winding shaft 6 is not rotated significantly in the reverse direction, and even if the biting force between the winding shaft 3 and the screw rod 12 is strong, there is no force to unscrew them. Since this is not transmitted to the entire movement axis 6, no harmful force is applied to the music box.

The material of the gears 7, 8, and 10 may be either metal or synthetic resin, and the gear 7 is preferably made of metal in terms of strength, and the hoisting gear 8 is preferably made of synthetic resin or a cast product due to its shape.

The gear 7 may be prevented from coming off by crushing the shaft end of the entire shaft 6 in a screwed state as shown in FIG.

If the music box 5 is small, the serrated teeth 9a may be omitted from the outer periphery of the brake piece 9, and the braking force may be generated by pressure contact with the abutting portion 2c.

In addition, since there is no longer an intermediate gear that can move freely in the engagement and disengagement direction, there is no play during full winding, and the locking phenomenon caused by interference between the teeth of the gear during winding is also eliminated, making it possible to wind more smoothly. Ta.

Furthermore, since the entire movement axis 6 and the winding axis 3 are always perfectly interlocked by the gears 7, 8, and 10, the problem of the music box not rotating when the winding key is placed on the stand and the music box body is rotated is solved. Ta.

Furthermore, since there is no need to incorporate a small spring, work problems are eliminated, and workability is improved and quality is stabilized.

Furthermore, an ordinary mass-produced music box having threaded portions 6a on all the shafts 6 can be used, and costs can be reduced.

In the above description, the music box 5 is built into the rotating doll 1 and the rotating doll is rotated as the music box plays, but the entire dance of the music box may be performed in a music box for other purposes in which the music box is wound through an intermediate gear.

[Effects of the invention] Since the present invention is constructed as described above, when the winding key etc. screwed onto the winding shaft is removed, the brake piece fixed to the winding shaft is displaced in the radial direction and touches the abutting part. When it hits, the brake piece and hoisting shaft are stopped from rotating, and the winding key can be removed, and only a small force is applied to the hoisting gear, intermediate gear, and gears that are screwed to the entire hoisting shaft and rotate as one. Since the gear screwed to the main axis will not come off, the gear will not damage the resin bottom plate, etc., and the force to remove the winding key will not be transmitted to the main axis, so no harmful force will be applied to the music box. Moreover, it is possible to provide a complete winding device for a music box that exhibits excellent effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of a complete winding device for a music box, Fig. 2 is a cross-sectional side view taken along the - line in Fig. 1, and Fig. 3 is a winding gear and a brake piece. Fig. 4 is a plan view of the music box, Fig. 5 is a sectional side view of the main part of a modified example in which gears are screwed onto all the shafts and the rear shaft ends are crushed to prevent them from coming off, and Fig. 6 is a cross-sectional side view of the main part of the conventional music box. FIG. 7 is a plan view of another conventional music box winding device, and FIG. 8 is a sectional side view of the main portion of FIG. 7. 2... Mounting plate, 2a... Contact portion, 3... Hoisting shaft, 5...
Music box, 6...All the main shafts, 7...Gears that rotate together with all the main shafts, 8...Hoisting gears, 9...Brake pieces, 10...
intermediate gear.

Claims (1)

[Scope of utility model registration request] In a device in which the entire winding shaft of a music box is protruded and connected to the winding shaft through a gear, a gear rotates integrally with the winding shaft, and an intermediate gear is constantly meshed with the gear.
A hoisting gear that constantly meshes with the intermediate gear; a hoisting shaft that the hoisting gear is rotatably fitted; and a hoisting shaft that is provided integrally with the hoisting shaft, and that engages with the hoisting gear when rotated in the hoisting direction and rotates in the opposite direction. A full-length winding device for a music box, which has a brake piece that is displaced in the radial direction by the rotation of the music box, and a contact part that is provided integrally with a mounting plate and is located in a displacement area of the brake piece.