JPH0138637Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a music box that plays music using a medium such as a disc or a card, which has an improved rotatable support structure for a ratchet wheel that is rotated by the medium to play a vibrating valve.

Conventionally, disc-type music boxes and card-type music boxes are already known. However, for example, as shown in FIGS. 3 and 7 of US Pat. No. 523,567, the ratchet wheel 17 is rotatably fitted onto a shaft 22, and the shaft 22 is fixed to both ends of the frame 19. side plate 20,2
0, and is prevented from coming off with a washer 24 and a screw 25. Furthermore, the interval between the ratchet wheels 17 is the frame 19.
They are maintained at equal intervals by protruding spacers 45 formed in the . Therefore, since the ratchet wheel is fitted onto the shaft and interposed between each spacer during assembly, a dedicated frame is essential, resulting in poor productivity and the need to connect the individual ratchet wheels and vibration valves. There are drawbacks such as the positioning support means being troublesome and the ease of assembly.

In view of the above-mentioned drawbacks, the purpose of the present invention is to reduce the number of parts by using a common spacer, to configure the ratchet wheel into one unit, to make it replaceable with the drum unit of conventional mass-produced music boxes, and to create a mass-produced frame and drive source. To provide a music box that plays on media such as discs and cards, which can be used as is, improving ease of assembly and productivity.

The present invention will be explained below with reference to illustrated embodiments. 1st
If we talk about the music box played by a disc in Figure 4, in Figure 1 the music box is in frame 1.
At the top, a barrel 11 as a full-movement drive source, a wind governor device 12, a ratchet wheel unit 2, a vibration valve 13, and a disk 14 are provided, respectively. Above frame 1 and barrel 1
1 and the wind governor device 3 are substantially the same as conventional mass-produced music box parts, and the vibrating valve 13 is formed so that its tip is in contact with each ratchet wheel 3 of the ratchet unit 2.

As shown in FIGS. 2 to 4, the ratchet unit 2 has gears 4a, 4b, and 4c integrally formed at one end of a shaft portion 4, and a hollow rotating shaft 5 is fitted around the outer periphery of the shaft portion. . The outer periphery of the other end 4d of the shaft portion 4 is knurled and a gear 6 is press-fitted therein. A pivot shaft hole 4e is bored in the other end surface of the shaft. Two spacers 7, 7 are fitted around the outer periphery of the hollow rotating shaft 5, and the gear 6 is meshed with the gear of the disk 14.

A plurality of ratchet wheels 3 are fitted onto the outer peripheries of the spacers 7, 7. A spacer stopper plate 8 fixed on the frame is engaged with one end of the spacers 7, 7. Above shafts 4, 5 and spacer 7
A ratchet unit 2 is composed of a gear 6 and a plurality of ratchets 3.

The ratchet wheel 3 has an annular shape with a round hole bored in the center.
A plurality of claws 3a are formed on the outer periphery.

The outer peripheries of the spacers 7, 7 are each formed in an arcuate shape so that the entire spacer can pass through the center hole of the ratchet wheel 3, and a plurality of arcuate grooves 7a are formed in parallel on the outer periphery. The ratchet wheel is fitted into a groove formed on the guide surface on the inner circumference of the ratchet wheel 3.

The rotating shaft 5 is fitted into the ratchet wheel 3 via the spacers 7, 7, so that the ratchet wheel 3 has a diameter that allows the ratchet wheel 3 to be positioned in the groove, and in this state, the ratchet wheel 3 cannot be removed from the spacers 7, 7.

A disk support 15 is fixed to a bearing portion 1a protruding from one side of the frame 1, and the disk 14 is rotatably fitted to a support shaft 15a provided on the disk support. The gear 6 above is on the bottom of the disk.
Gears meshed with and multiple pins 1 that match the music
6 is provided. The pin 16 is arranged so as to come into contact with the claw 3a of the ratchet wheel 3.

When the above-mentioned music box is assembled, the two spacers 7, 7 are inserted into the round holes of the plurality of ratchet wheels 3 with the plurality of grooves 7a facing outward, and the ratchet wheels are placed in the groove positions, and the hollow rotating shaft is 5 is both spacers 7, 7
The ratchet wheel is inserted between the grooves 7a and 7a, and the ratchet wheel is positioned in the groove 7a.
The shaft 4 is inserted into the rotating shaft 5. Next, the other end 4 of the shaft 4
The gear 6 is press-fitted into the gear d to form one ratchet unit. Next, a ratchet unit is attached to the drum bearing position of the conventional mass-produced frame 1, a pivot shaft 17 is attached to the bearing portion 1a, and the shaft 4
It is fitted into a pivot shaft hole drilled in the other end surface. A disk support stand 15 is fixed to the bearing portion 1a of the frame 1, and the disk 14 is fitted onto the support shaft 15a. The annular inner circumferential surface of the ratchet wheel 3 and the bottom surface of the groove 7a of the spacer 7 may be formed in a shape that reduces the sliding contact surface in order to reduce frictional resistance.

When the music box is assembled as described above and the entire drive source in the barrel 11 is stored, the shaft 4 is rotated by the gear 4a, and the wind governor device is rotated by the gear 4b. The rotation of the shaft 4 causes the disk 1 to move through the gear 6.
4 is rotated, the pin 16 rotates the pawl 3a of the ratchet wheel 3, and the other pawl 3b of the ratchet wheel plays the vibration valve to produce music.

5 to 7 show a music box in which a ratchet is rotated by a card 18, a gear 5a is formed on the outer periphery of one end of the hollow rotating shaft 5, and an intermediate gear 9 is formed between the gear 5a and the gear 4c. are engaged. The hollow rotating shaft 5 and the spacers 7, 7 are engaged with each other by a protrusion 5b and a recess 7b, and the spacers 7, 7 are rotated faster than the shaft 4. The spacer rotation stopper plate 8 is not used.

As shown in FIG. 7, the card 18 has a plurality of card feeding holes 18a formed at one side edge thereof at equal intervals in the longitudinal direction. A plurality of holes 18b are bored in the entire surface of the card 18 at horizontal intervals equal to the intervals of the ratchet wheels 3 and in the longitudinal direction in accordance with the music. The tooth tip of the gear 4b is inserted into the feeding hole 18a in the form of a sprocket, and the card 18 is fed.

The music box played in the above card is gear 4b
The card 18 is fed at a constant speed, and the ratchet wheel 3 is fed by the gear wheel 4.
c. The pawl 3a is brought into contact with the back surface of the card 18 by the rotational force applied by the intermediate gear 9, the gear 5a, and the spacers 7, 7. When the card is fed and the hole 18b position reaches the pawl 3a, the pawl 3a jumps into the hole 18b and is rotated, and the vibration valve 13 is flicked by the other pawl 3b.

In the case of a music box played using the above cards, prepare two sets of ratchet wheels, stack them one above the other, engage the gear 4b and the claws 3a of the plural ratchet wheels 3, and apply the card to the upper ratchet wheel. The vibration valve may be configured to be flicked by the pawl of the lower ratchet wheel.

In the above description, two spacers 7, 7 are used, but the ratchet wheels may be held at equal intervals with one spacer 7 as shown in FIG. The hollow rotating shaft 5 may be omitted.

Since the present invention is constructed as described above, conventional mass-produced frames can be used as is, and a ratchet unit can be used instead of a drum unit, so mass production equipment can be utilized and costs can be reduced significantly. We can provide music boxes that use discs or cards as media. In addition, the ratchet unit can be easily replaced with a drum unit because a plurality of ratchet wheels are positioned on the spacer, and the spacer allows the ratchet unit to be easily positioned stationary on the rotating shaft. Also, since the spacer is common to each ratchet wheel, the number of parts is small and assembly is easy. Furthermore, by removing the rotation prevention plate of the spacer, it is easy to change from a disk type to a card type. In addition, since the ratchet unit has approximately the same size as the drum unit and is configured to be replaceable, it can be made smaller and, like the conventional drum type, can be used in a wide range of applications. Moreover, it is possible to provide a music box that plays with excellent media such as discs and cards.

Of course, if the ratchet unit of the present invention is increased in size, a corresponding frame will be required, but since the unit is supported, a simple structure similar to the above may be sufficient.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIGS. 1 to 4 show a disk-type music box, FIG. 1 is a plan view of the music box, FIG. Figure 3 is a cross-sectional side view of Figure 2, Figure 4 is an exploded perspective view of the ratchet wheel unit, Figures 5 to 7 are card-type music boxes, and Figure 5 is a cross-sectional front view of the main parts of the ratchet wheel unit and card. 6 is a sectional side view of FIG. 5, FIG. 7 is a plan view of the card, and FIG. 8 is an explanatory diagram of another embodiment of the spacer and ratchet wheel. 1... Frame, 2... Ratchet wheel unit, 3...
Ratchet wheel, 3a, 3b...claw, 4...shaft, 4a, 4
b, 4c, 5a, 6... Gear, 5... Rotating shaft, 7
...Spacer, 7a...Groove, 13...Vibration valve, 1
4...disc, 18...card.

Claims (1)

[Scope of utility model registration request] In a music box that plays the vibrating valves by rotating a ratchet wheel facing each vibrating valve using a medium such as a disk or card,
A vibration valve and a ratchet wheel unit are supported on the frame so as to face each other, and the ratchet wheel unit is composed of an annular ratchet wheel having a plurality of pawls on the outer periphery, and a plurality of grooves provided in parallel so that the bottom of each groove guides the inner periphery of the ratchet wheel. A disk consisting of a spacer in which each ratchet wheel fits into the bottom of the groove, and the entire ratchet wheel can pass through the inner hole of the ratchet wheel, and a shaft having a diameter that fits inside the spacer within the ratchet wheel and positions the ratchet wheel in the groove. , a music box that plays music using media such as cards.