JPH0997054A - Disk type music box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the durability by arranging a driving roller provided integrally with a support shaft for plural ratchets and plural disk pressure rollers supported rotatably on an arm shaft closely while shifting their positions so that they do not face each other directly. SOLUTION: A driving gear 13 pressed onto the support shaft 12 for the ratchets 11 is provided with the driving roller 14 on the side of a disk 3, and this driving roller 14 abuts against the reverse surface 3b of the outer periphery of the disk 3 to drive and rotate the disk 3 by friction. A strut 18 stood on a frame 9A is mounted with the base end 6a of the arm shaft 6 rotatably, and the arm shaft 6 is arranged opposite above the support shaft 12 for the ratchets 11 and equipped with plural rotatable disk pressure rollers 19. The disk pressure roller 19A arranged on the outer peripheral side of the disk 3 among the disk pressure rollers 19 is shifted in a radius direction of the disk 3 and arranged closely not to face the driving roller 14 directly. Consequently, the driving roller is prevented from being overloaded and the durability of the driving roller and disk is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc-type music box which produces a sound by rotating a plurality of ratchet wheels and playing a vibrating valve with a large number of holes corresponding to a song formed on a disc.

[0002]

2. Description of the Related Art A disc-type music box is known in which a vibrating valve is played by a plurality of ratchet wheels which are rotated by engaging a large number of holes corresponding to a curve formed in the disc to produce a sound. For example, in the disk type music box described in Japanese Utility Model Laid-Open No. 6-23094, the ratchet wheel that flips the vibration valve is supported by a support shaft that is driven by a manual drive source, and the pressing roller is rotatably arranged so as to face the ratchet wheel. A supporting arm shaft is provided. The base end of the arm shaft is rotatably supported by the base of the music box, and the engaging portion provided at the tip is engaged with the central shaft provided on the drive wheel driven by the manual drive source, and the same wheel is engaged. It holds down the disk attached to the. The disk is formed with a plurality of holes that engage with the central shaft and the protrusions provided on the drive wheel, and the central shaft and the protrusions are fitted into the holes and mounted on the drive wheel. That is, the disk is rotationally driven by the center drive method in which the disk is driven on the center side. The engaging portion includes a locking lever that engages with the central shaft. This locking lever is supported on the lower surface side of the chuck provided on the arm shaft so that it can be engaged with and disengaged from the groove formed in the central axis by a torsion spring wound around this shaft. Is urged by. On the other hand, in addition to the center drive method described above, the disk drive method is a gear drive method in which a tooth groove is formed in the circumferential direction of the disk and a gear is meshed with this groove to drive the disk in rotation, or a pressing roller. There is a friction system in which a drive roller is provided so as to face each other, and a disk is sandwiched and rotated by the drive roller and the pressing roller.

[0003]

However, in the case of the friction type disc type music box described above, since the pressing roller and the driving roller are arranged to face each other, the pressing force against the disc becomes strong as the thickness of the disc changes. The drive system is overloaded. Further, both rollers are deformed during long-term use, which causes a problem in durability of the rollers. With a gear-driven disc music box, it is difficult to align the disc with the gear, and when the gear is engaged with the tooth groove formed on the disc, the disc is scratched by the gear and the disc is damaged, resulting in durability. Will cause problems.
In the case of the center-driven disc type music box, the driving torque applied to the disc is small, so that the drive source becomes large and the size of the apparatus becomes large. When mounting the disk on the drive wheel, it is troublesome to fit the projection and the hole, and there is a problem that the projection easily scratches the disk.

[0004]

In view of the above, according to the first aspect of the present invention, a plurality of ratchet wheels that rotate in engagement with a large number of holes formed in a disc are used to play a sound by vibrating the diaphragm. A support shaft that rotatably supports the plurality of ratchet wheels, a drive roller that is integrally provided on the support shaft and that is rotated by a motor, and is rotatably supported by the base of the disk music box. , A plurality of disk pressing rollers rotatably supported by the arm shaft, and an arm shaft facing the supporting shaft in parallel by engaging with a central shaft planted in the base. One of the rollers, the disc pressing roller and the driving roller, were arranged close to each other so as not to directly face each other. According to a second aspect of the present invention, the drive roller is configured by fitting an O-ring in an annular groove formed in a shaft portion of a gear provided on the support shaft and rotated by the motor. In the invention according to claim 3, the drive roller is arranged on the outer peripheral side of the disk.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 1, 2 and 3, a disc-type music box shown by reference numeral 1 includes a disc 3 having a large number of holes 2, a ratchet unit 4, a diaphragm 5, an arm shaft 6, and a drive motor 7 capable of rotating in the forward and reverse directions. A drive unit 8 including a music box unit 9 mounted on a frame 9A as a base is mainly configured. The music box unit 9 is screwed to a base 10 of a casing (not shown). Frame 9
A is made of metal and also has a resonance function of the vibration sound of the diaphragm 5.
A base plate 9B made of metal is fixed to the frame 9A, and a center shaft 17 is erected and solidly planted on the base plate 9B.

A center hole 3a is formed in the center of the disk 3, and the center hole 3a is inserted into the center shaft 17 to be rotatably supported by the music box unit 9. The hole 2 of the disk 3 is punched in the disk 3 by punching or pressing so as to correspond to the music to be played, and is driven to rotate in the ringing direction indicated by the arrow a by the drive unit 8. Although hard paper is used for the disk 3, a flexible film or plastic may be used.

The claw wheel unit 4 has a disk 3 below the disk 3.
Are arranged along the radial direction. This unit 4
Is composed of a plurality of ratchet wheels 11 that engage with the holes 2 and a support shaft 12 that passes through the plurality of ratchet wheels 11. The support shaft 12 is rotatably supported by a cut-and-raised portion 9C of the main plate 9B and a bracket 26 on which the drive unit 8 is mounted. As shown in FIG. 4, each of the ratchet wheels 11 is rotatably supported independently of each other by a spacer 12a formed integrally with the support shaft 12. Each spacer 12a
Is in proper sliding contact with the end surface of the ratchet wheel 11, and
Gives friction force to.

As shown in FIG. 5, the ratchet wheel 11 has a plurality of (four in this case) claw portions 11a formed on its peripheral surface.
The claw portion 11a is adapted to engage with the hole 2 of the disk 3 which rotates when the music box is in a playing state, and when engaged with the hole 2, the claw portion 11a is rotationally driven in the direction of the arrow b by a predetermined angle. The tip 5b of the vibration valve 5a is adapted to be repelled on the curved surface 11b side. The pitch angle θ of the claw 11a is determined by the tooth 11
In the initial state of the ratchet wheel 11 in which the linear portion 11c of a contacts the upper surface 5c of the vibration valve 5a, the other claw portion 11a that is not in contact with the vibration valve 5a with respect to the disk 3 is set to an angle that does not make a vertical state. There is.

As shown in FIGS. 1 and 6, a vibrating plate 5 repelled by the claw portions 11a of each claw wheel 11 is fixed to the frame 9A beside the claw wheel unit 4. The vibrating plate 5 is composed of the same number of vibrating valves 5a as the number of claw wheels 11, and is arranged so that the claw portion 11a can be engaged with the tip 5b of the vibrating valve 5a.

A drive gear 13 is press-fitted into the support shaft 12 as shown in FIGS. 1 and 7, and can rotate integrally with the support shaft 12. The drive gear 13 is provided with a drive roller 14 on the outer peripheral side of the disk 3. Drive roller 14
Forms an annular groove 15 in the shaft portion 13a of the drive gear 13,
An O-ring 16 formed of an elastic member (rubber) is inserted into the annular groove 15 and is formed.
The disk 3 is brought into contact with b to rotate the disk 3 by a frictional force.

As shown in FIGS. 2 and 3, a column 18 is erected on the frame 9A at a position outside the rotation range of the disk 3, and the column 18 has a base end 6a of the arm shaft 6. It is rotatably attached. The arm shaft 6 is disposed above the support shaft 12 so as to face each other, and includes a plurality of disc pressing rollers 19. The disc pressing roller 19 is provided with an arm shaft 6
One for each of a plurality of collars 20 rotatably inserted in
They are formed one by one, and while being restricted from moving in the axial direction,
It is rotatably held at appropriate intervals. The plurality of disc pressing rollers 19 are arranged so as to be located between the ratchet wheels 11, and can come into contact with the outer peripheral surface of the spacer 12a when the disc 3 is not mounted. Prevents falls. Among the plurality of disc pressing rollers 19, the disc pressing roller 19A arranged on the outer peripheral side of the disc 3 is arranged close to the disc 3 in a radial direction so as not to directly face the driving roller 14. The disc pressing roller 19A is arranged so as not to contact the spacer 12a but to be displaced from the drive roller 14 by at least about half the roller width in the axial direction and to contact the drive roller 14. The diameters of the disc pressing roller 19A and the driving roller 14 are
The discs 3 are set so as to slightly overlap each other in the roller radial direction when the discs 3 are not interposed between them, and the discs 3 are sandwiched with an appropriate pad pressure when the discs 3 are interposed.

At the tip portion 6b of the arm shaft 6, a central shaft 17
A bracket 22 that supports a locking lever 21 that engages with is fixed. The bracket 22 is formed to have an L-shaped cross section, and the short side portion 22A thereof is attached and fixed to the tip portion 6b. As shown in FIGS. 8 and 9, a lock lever 21 rotatably supported by a pin 23 is provided on the upper surface 22a of the long side portion 22B of the bracket 22. This locking lever 21 has a long hole 22c provided in the bracket 22 and a spring hook 21b provided in the locking lever 21 at both ends 24a,
24b is locked, and the torsion coil spring 24 wound around the pin 23 imparts a swinging habit in a direction to engage with the groove 17a formed in the central shaft 17 (direction of arrow c).
The long side portion 22B is formed with a hole 22b that is loosely fitted to the central shaft 17. The tip of the central shaft 17 is chamfered in a tapered shape. The center shaft 17 has a function of rotatably supporting the disk 3 and a function of swinging the locking lever 21 to the outside of the shaft by a tapered portion when the hole 22b is loosely fitted.

The groove 17a is provided at a position where the support shaft 12 supporting the ratchet wheel 11 and the arm shaft 6 are held substantially parallel to each other when locked with the locking lever 21. The arm shaft 6 is
When placed on the central shaft 17 in a locked state, the disk 3 is sandwiched between the disk pressing roller 19 and the drive roller 14 to provide an appropriate pad pressure. That is, in the disc pressing roller 19, the disc 3 rotates and the hole 2 thereof causes the ratchet wheel 1 to move.
Disk 3 made of relatively thin paper board material when rotating 1
The disk is pressed in order to prevent the wheel from bending and escaping from the ratchet wheel 11.

The drive unit 8 is, as shown in FIG.
A worm gear 25 fixed to the shaft 7a of the drive motor 7,
Worm wheel 2 that meshes orthogonally with worm gear 25
7. A worm wheel 27 and a pinion gear 28 which is provided so as to be rotatable integrally with the worm wheel 27 and which meshes with the drive gear 13. The worm wheel 27 is rotatably supported by a bracket 26 fixed to the frame 9A with screws 29, 29. The drive motor 7 is also fixed to the bracket 26. The drive unit 8 decelerates the rotation of the drive motor 7 by these gears and transmits the decelerated rotation to the drive gear 13 to give an appropriate rotational torque to the mounted disc 3.

The drive motor 7 is connected to a power source via a switch (not shown). This switch is a switch that can switch the polarity of the current to the drive motor 7, and drives the drive motor 7 so that it can rotate forward and backward. The drive motor 7 rotationally drives the support shaft 12 in the direction of rotating the disk 3 in the sounding direction a at the time of forward rotation, and the arrow d in FIG. 5 so that the ratchet wheel 11 is at the initial position at the time of reverse rotation. The support shaft 12 is driven so as to rotate in the direction.
The switch operation for setting the ratchet wheel 11 to the initial position is performed before mounting the disk 3.

The operation of the disc type music box 1 having such a configuration will be described. First, after inserting the central hole 3b of the disk 3 into the central shaft 17, the arm shaft 6 is rotated in the arrow e direction from the open state shown by the chain double-dashed line in FIG.
The second hole 22b is fitted to the central shaft 17. Then, as shown in FIG.
As indicated by the solid line, the locking lever 17 which is urged to oscillate in the direction of arrow c oscillates toward the release position indicated by the chain double-dashed line. When the tip of the locking lever 21 engages with the groove 17a,
The locking lever 21 is urged to oscillate in the direction of arrow c to hold the arm shaft 6, and while the disk 3 is pressed from above by the disk pressing roller 19, the disk pressing roller 19A and the drive roller 1 are held.
The disk 3 is sandwiched between 4 and. With this operation, the mounting operation of the disc 3 is completed.

Next, the drive motor 7 is rotated forward by operating a switch (not shown). Then, this rotation is decelerated and transmitted to the drive gear 13 to be integrated with the drive roller 14.
The support shaft 12 is driven to rotate. When the drive roller 14 rotates, the disk 3 rotates in the ringing direction indicated by the arrow a in FIG. 1 and the friction force between the support shaft 12 and the spacer 12a causes each ratchet wheel 11 to be indicated by the arrow b in FIG. Rotational torque in the direction is given. However, the disk 3 is located above the ratchet 11.
Is located, the rotation of the ratchet wheel 11 is suppressed by the unperforated portion of the disk 3 here.

As described above, when the disk 3 is driven by the frictional force between the drive roller 14 and the disk pressing roller 19A, a groove is formed in the peripheral portion of the disk 3 as in the conventional gear drive system, or the groove and the drive gear are used. There is no risk of damage to the disk 3 due to the position alignment or the drive gear.

Further, since the drive roller 14 is arranged on the outer peripheral side of the disk 3, the disk 3 can be driven with a smaller force than that of driving the disk 3 on the center side as in the conventional center drive system, and drive of the same output. When the motor and the same drive mechanism are adopted, a large drive torque can be applied to the disc 3. on the other hand,
When the drive torque applied to the disk 3 is the same as in the center drive system, the output of the drive motor 7 can be reduced, the strength of each gear forming the drive unit 8 can be reduced, and the drive motor 7 can also be reduced. 8 can be miniaturized.

Further, since the drive roller 14 and the disc pressing roller 19 are arranged so as to be displaced in the axial direction, it is possible to prevent the drive roller 14 from being deformed with time as compared with the case where the conventional drive and disc pressing rollers are arranged to face each other. it can. Also,
Since both rollers are displaced, the pressing force when the disk 3 is deformed is unlikely to be strong as in the case of the conventional opposed type, the load on the drive unit 8 is reduced, and the disk 3 is smoothly rotated. You can

When the disk 3 rotates and the hole 2 is positioned above the ratchet wheel 11, the ratchet wheels 11 facing it rotate one after another, and the claw portions 11a of the respective ratchet wheels 11 jump into the respective holes 2 and engage. To meet. The claw wheel 11 engaged with the hole 2 is rotated by pushing the claw portion 11a in the moving direction by the edge of the hole 2 that moves with the rotation of the disk 3, and the vibrating valve 5a is positioned below the claw portion. 11a plays the songs one after another to play songs.

To release the holding position of the arm shaft 6,
One end 21b of the locking lever 21 may be swung clockwise in FIG. 8 to remove the lever tip from the groove 17a, and then the arm 6 axis may be rotated in the opening direction.

To make the ratchet wheel 11 in the initial state, the polarity to the drive motor 7 is reversed. Then, the support shaft 12 rotates in the reverse direction, and the action of the friction plates 12a arranged between the ratchet wheels 11 causes the ratchet wheels 11 to simultaneously rotate in the direction of arrow d as shown in FIG. The claw portion 11a abuts. Due to this abutment, the rotation of the ratchet wheel 11 is hindered, and the ratchet wheels 11 placed at different positions are brought into alignment with the diaphragm 5 in contact. Pitch angle θ of the claw portion 11a in the claw wheel 11
Is set at an angle such that the other claw portions 11a are not in a vertical state with respect to the disc 3 in the initial state.
By setting the initial state at the time of mounting, the damage of the disk 3 by the claw portion 11a can be extremely reduced, and the durability of the disk 3 is improved.

Since the locking lever 21 is rotatably supported by the pin 23 on the upper surface 22a side of the bracket 22 of the arm shaft 6, the groove 17a of the central shaft 17 and the locking lever 2 are supported.
Even when the arm shaft 6 is erroneously rotated in the opening direction when 1 and 2 are in the locked state, the arm shaft 6 can be overloaded at that time, and the locking lever 21 is overloaded. It doesn't take. In the conventional mounting structure of the locking lever 21,
Since the lock lever 21 is provided on the lower surface side of the bracket 22, if the arm shaft 6 is opened in the locked state in the opening direction, the lock lever 21 may be overloaded and the lever may be deformed. However, by adopting the structure of the present embodiment, the overload on the locking lever 21 can be prevented by the bracket 22.
It can be received as a whole, and the durability of the locking lever 21 is improved.

As shown in FIG. 11, the locking lever 2
1 may be covered with the cover 30. In this case, the pin 31 is provided upright on the long side portion 22B of the bracket 22, and the cover 30 is attached with the insertion hole 30a engaging with the pin 31 and the disc pressing roller 19B located on the inner peripheral side of the disc 3. And the disc pressing roller 19B
The bracket 30 by engaging the cover 30 with the pin 31
Attach to When the cover 30 is provided in this way, the structure in the vicinity of the locking lever 21 can be hidden and the appearance can be improved, and the operator's clothes or the like can be prevented from being caught.

[0026]

According to the first and second aspects of the present invention, a drive roller that is integrally provided on a support shaft that rotatably supports a plurality of ratchet wheels and that is rotated by a motor is rotatably supported by an arm shaft. Since one of the multiple disc pressing rollers is placed close to each other by shifting the positions so that they do not directly face each other, it is possible to prevent excessive load and deformation on the drive roller and It is possible to prevent physical deformation. Therefore, as compared with the conventional friction system in which the drive roller and the disc pressing roller are arranged to face each other, the disc can be stably driven to rotate and the durability of the drive roller can be improved. In addition, since the gear drive system is not adopted, it is not necessary to perform positioning or the like when mounting the disc, and damage to the disc due to the gear can be prevented, so that the durability of the disc is improved.

According to the invention described in claim 2, since the O-ring is fitted in the annular groove formed in the shaft portion of the gear provided on the support shaft to form the drive roller, in addition to the effect of the invention described in claim 1, Thus, the drive roller can be easily provided.

According to the third aspect of the present invention, since the drive roller is arranged on the outer peripheral side of the disc, the drive torque applied to the disc becomes larger when the same drive source is used as compared with the center drive system, so that it is efficient. The driving force can be transmitted, and the increase in size of the device can be suppressed.

[Brief description of drawings]

FIG. 1 is a schematic configuration plan view of a disk-type music box showing an embodiment of the present invention.

FIG. 2 is a front view showing the configuration of a disc-type music box.

FIG. 3 is a rear view showing the configuration of the disk-type music box and the operating state of the arm.

FIG. 4 is a partially cutaway enlarged view showing an attached state of a ratchet wheel.

FIG. 5 is a front view showing the relationship between the operation of the ratchet wheel and the vibration valve.

FIG. 6 is a cross-sectional view of a disc-type music box.

FIG. 7 is a partially cutaway side view showing a configuration of a drive gear and a drive roller.

FIG. 8 is a plan view showing the structure of a locking lever.

FIG. 9 is a cross-sectional view showing a locked state of a locking lever.

FIG. 10 is a plan view showing a configuration of a drive mechanism of a disc-type music box.

FIG. 11 is a cross-sectional view showing a configuration in which a cover is provided on the locking lever.

[Explanation of symbols]

 1 Disc Type Music Box 2 Hole 3 Disc 3b Disc Outer Side 5 Vibrating Plate 6 Arm Shaft 7 Motor 9A Base 11 Plural Claw Wheels 12 Support Shaft 13 Gear 13a Shaft 14 Drive Roller 15 Annular Groove 16 O-ring 17 Center Shaft 19 Disc Pressing roller 19A One disk pressing roller

Claims (3)

[Claims] 1. A disk having a large number of holes corresponding to a song,
In a disc-type music box that produces sound by flipping a vibration valve by a plurality of ratchet wheels that are engaged with the holes and rotated, a support shaft that rotatably supports the plurality of ratchet wheels and is integrally provided on the support shaft. A drive roller that is rotated by a motor, and an arm shaft that is rotatably supported by the base of the disk-type music box and that engages with a central shaft that is fixedly planted in the base to face the support shaft in parallel. A plurality of disc pressing rollers rotatably supported on the arm shaft are provided, and the drive roller is arranged close to the disc pressing roller so as not to directly face one of the plurality of disc pressing rollers. A disk-type music box characterized by that. 2. A disc-type music box according to claim 1, wherein an annular groove is formed in a shaft portion of a gear provided on the support shaft and rotated by the motor, and an O-ring is fitted in the annular groove to form the drive roller. . 3. The disc-type music box according to claim 1, wherein the drive roller is arranged on the outer peripheral side of the disc.