JPS602629Y2 - music box - Google Patents

Description

[Detailed description of the device] This device rotatably attaches a disk with projections to the frame, keeps the overlapping length of the vibrating piece fixed to the frame and the projections of the disk above a certain length, and This relates to a music box whose purpose is to release the hook relatively quickly.

Conventionally, in a music box, a protrusion protruding from the peripheral wall of a drum is brought into contact with the end of a horizontally protruding vibrating piece, causing the vibrating piece to vibrate and generate a predetermined tone. It is extremely difficult to replace the drum at will, and even if it were possible to replace the drum, there would be problems such as storage and retrieval of the drum would be troublesome.

Therefore, a structure is known in which a disk is used instead of a drum, a projection is provided on the lower surface of the disk, the operation wheel is rotated by this projection, and the vibrating element is vibrated by the teeth of the operation wheel. , the operating wheel and the protrusions on the disc were used as a set to produce sound, which not only made the structure complex, but also made it difficult to achieve uniform performance in mass production.

On the other hand, a structure in which the vibrating piece and the protrusion of the disk could be brought into direct contact could be considered, but in this case, the vibrating piece was set vertically and parallel to the protrusion, and the tip was brought into contact with it, so the overlapping of the two If you make it larger, the latching between the two will not be released unless the vibrating piece is significantly deformed, and if you make the overlap length smaller, it will depend on various conditions such as the deformation of the disc, the length of the protrusion, and the mounting accuracy of the diaphragm. There were production bottlenecks, such as the risk of producing something that would not be able to achieve the intended purpose (or not be able to provide the desired amplitude), so it has not yet been able to be put into practical use.

However, this idea minimizes the deformation of the vibrating element even if the overlapping length between the protrusion and the vibrating element exceeds a certain level by giving a slight angle to the contact area between the protrusion of the disk and the tip of the vibrating element. The above-mentioned conventional problems have been solved.

That is, to explain this invention with reference to an embodiment, a through hole 3 for exposing the vibrating element 2 is provided in the body frame 1, and the tip of the vibrating element 2 is projected from the through hole 3 onto the body frame 1 and exposed. let

The vibrating piece 2 is configured to generate a vibrating sound of a predetermined scale by providing cut grooves 4 of sequentially different depths from one side edge of a thin metal rectangular plate toward the other side edge. In the example, the thickness is 1.077E+71. A large number of small pieces with a width of 1.2 mm are arranged in parallel at intervals of 0.2 vrnh, and the base is the same plate, and the slope (45 degrees ).

Therefore, the vibrating piece is also at an angle of 45 degrees with respect to the instrument frame.

A disk 7 made of synthetic resin is placed on the same circumference with the through hole 3 in between,
8 is fixed with screws 9 and 10, and above the through hole 3, a presser ring 12 attached to the tip of an arm 11 is installed oppositely, and the base of the arm 11 of the presser ring 12 is attached to the vessel frame. A spring is attached between the seat plate 15 and the lower end surface of the bearing 13. 1
6 is fitted so that the elevator rod is always indexed downward.

A central shaft 17 is installed vertically in the center of the body frame 1, and a boss 19 of a disc 18 is rotatably fitted onto the central shaft 17. On the lower surface of the disc 18, a small piece of the vibrating piece and a A large number of protrusions 20 are vertically protruded and are long enough to contact and repel the protrusions.

This protrusion is integrally injected during molding of the disc body.

Of course, when it comes to monolithic forms, it is necessary to consider its strength.

In the figure, 21 is a leg rod of the body frame, and 22 is a stopper. Regarding the driving relationship of the disk, for example, a rubber roller fixed to the shaft of a motor is brought into contact with the periphery of the disk to transmit rotational force, but both are not shown in the figure. Not.

The implementation device is used by rotating the mounting waist disk 18 as shown by the chain lines in FIGS. 1 to 3. Since the protrusion 20 rotates while maintaining the correct shape near the hole 3, the protrusion 20 comes into contact with the small piece of the vibrating piece 2 with the correct overlap length, and can repel it.

In the above, the operating angle of the vibrating piece when the vibrating piece is attached to the protrusion at different angles from 90 degrees to 10 degrees, the overlap length (%) and the overlap length when the length of the vibrating piece is 5-) The result is as shown in the following table.

As is clear from the above table, when the length of the vibrating piece is 5-, and the operating angle is set to 5.6 to 1.2, the overlapping length between the vibrating piece and the protrusion is 1.05 mm or more.

According to the overlap length of 3.5% or more, the vibrating element and the protrusion are 1
．． This results in an overlap of 75m+y+ or more, which poses no problem in practical terms.

Therefore, the mounting angle of the vibrating piece is preferably 20 degrees to 70 degrees with respect to the horizontal plane, but if the length and manufacturing accuracy of the vibrating piece are taken into consideration, a range of 10 degrees to 80 degrees is also usable.

That is, according to this invention, since a predetermined angle is provided between the protrusion provided on the disk and the contact portion of the vibrating element, it is possible to obtain a predetermined overlap length within a predetermined operating angle. , which eliminates the need for a control wheel.

Furthermore, since the lower pressure device is provided, the contact length between the protrusion and the vibrating piece can be maintained accurately as designed, and a predetermined piece of music can be played.

In addition, since no operating wheels are required, the structure is simple, and there is no fear of failure, making it practical for mass production.

[Brief explanation of drawings]

Figure 1 is a front view of the embodiment of this invention, Figure 2 is a side view, Figure 3 is a plan view, Figure 4 is a bottom view with a portion of the disk omitted, and Figure 5 is a partial view. FIG. 1... Instrument frame, 2... Vibration piece,
3...Through hole, 4...Notch groove, 5...
...screw, 6...block, 7,8...
... Disc, 9, 10... Screw, 11...
... Arm, 12 ... Presser ring, 13 ...
・Bearing, 14... Lifting rod, 15... Seat plate, 16... Spring, 17... Central shaft, 18... Disc. , 19...boss,
20... Protrusion, 21... Leg rod, 22.
...Stopper, 23...Contact part.

Claims (1)

[Scope of utility model registration request] In a device that generates sound by playing a vibrating piece fixed in a cantilevered manner on the body frame with a protrusion provided on the back of a disk, the vibrating piece is placed so that its contact surface forms an angle of 20 to 70 degrees with the protrusion. A music box that protrudes from a body frame and is provided with a lower pressure device for controlling the posture of a disk near a contact position between the vibrating piece and the protrusion.