JPH0997053A - Disk type music box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure sufficient sound volume and improve sound quality even when music is played with an opening/closing lid closed by partitioning the inside of a box body with an intermediate substrate into a music box chamber on the opening/closing lid side and a sounding chamber on the body side, and providing the sounding chamber with a sounding hole. SOLUTION: The box 50 composed of the box body 51 and opening/closing lid 52 is partitioned with the intermediate substrate 10 into the music box chamber 100 and sounding chamber 200, and a disk 3 and a music box unit 9 are arranged in the music box chamber 100. Namely, the music box chamber 100 is formed between the opening/closing lid 52 and intermediate substrate 10, the chamber 200 is formed between the intermediate substrate 10 and a bottom plate 510, and an opening part 70 which communicates with the chamber 200 is formed below the front part 511 of the box body 51. This opening part 70 has a sounding opening guiding a sound produced by the music box unit 9 to outside the box body 51 and a drawer 73 inserted slidably into the opening part 70 is slid to close and open the opening part 70, thereby adjusting the volume of the playing sound leaking from the music box unit 9.

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 to play a vibrating valve with a large number of holes corresponding to a song formed on a disc.

[0002]

2. Description of the Related Art In a disk type music box described in Japanese Utility Model Publication No. 3-26558, a music box unit having a vibration valve and a ratchet wheel for flipping the valve is fixed to a main body of a box having an opening / closing lid. Above the music box unit, there is provided a top plate that forms a support shaft for mounting a disk provided with a pin that engages with the ratchet wheel. The music box unit is housed in a space formed by the top plate and the box body, and the disk is rotationally driven by the drive unit. In the disc-type music box having such a configuration, when the sound is played with the opening / closing lid closed, the sound is muffled in the box and becomes small. Therefore, the sound is played with the opening / closing lid opened from the box body.

[0003]

However, in such a disc-type music box, since the disc is rotated to make a sound, friction noise due to the sliding contact between the disc and the drive portion and noise from the drive source are generated, and the sound is produced. There is a problem that noise is mixed in. When the lid is closed and the sound is played, the noise and the fricative noise cannot be heard, but there is a problem that the volume of the sound from the music box becomes low. Especially,
If the music box unit, which is the source of sound, is housed in the space as in the conventional example, this phenomenon will appear significantly. That is, in the conventional disc-type music box, it is effective to close the opening / closing lid in order to improve the sound quality, but when the opening / closing lid is closed, the volume of the sounding sound is significantly reduced, and the sound quality is improved and the volume is secured at the same time. Difficult to do. Further, if the music box is played with the opening / closing lid open, there is a concern that dust, foreign matter, or the like may enter the inside of the music box.

[0004]

Therefore, in the invention according to claim 1, a music box unit provided in a box having an opening / closing lid and driven by an electric drive source is set with a disc corresponding to a piece of music. In a disk-type music box to be played, an intermediate substrate is provided in the box body of the box, the inside of the box body is partitioned by the intermediate substrate, and the opening / closing lid side is the music box chamber, and the body side adjacent to the music box chamber via the intermediate substrate. As a sound emitting chamber, the music box unit and the disk are arranged on the side of the music box, and a sound emitting hole communicating with the outside is provided in the sound emitting chamber. According to the second aspect of the invention, the box located on the side of the sound emitting chamber is provided with an opening into which a drawer that is detachable from the sound emitting chamber is inserted, and the opening is used as the sound emitting hole. In the invention according to claim 3, the sound emitting hole is formed on the side surface portion of the box, and the sound emitting hole is closed by a cloth member having air permeability. In the invention according to claim 4, the sound output hole is part of the pattern on the side surface of the box.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. A disc-type music box shown by reference numeral 1 in FIG. 1 is a box 50 composed of a box body 51 and an opening / closing lid 52.
Is divided into two parts, that is, a music box chamber 100 and a sound output chamber 200 by partitioning with an intermediate substrate 10, and a disk 3 and a music box unit 9 are arranged in the music box chamber 100.

[0006] The box body 51 is a quadrangle formed by assembling a wooden board, and the bottom is closed by a bottom plate 510. A hinge 60 is fixed to the upper rear portion 51a of the box body 51.
One end 52a of the opening / closing lid 52 is attached to the hinge 60, and the opening / closing lid 52 is rotatable with respect to the box body 51. Grooves 61 are formed on the four inner side surfaces 51b of the box body 51, respectively. Wooden mounting plates 62 that support and fix the intermediate substrate 10 are inserted into the grooves 61, respectively. The mounting plate 62 extends in the front-rear and left-right directions of the box body 51 in FIG.
It projects from the inside of the box body 51 from 1b. The intermediate substrate 10 is detachably attached to the protruding portion of the attachment plate 62 with a plurality of screws 63.

The open / close lid 52 and the box body 51 are connected by a link mechanism 64. The link mechanism 64 includes the opening / closing lid 52.
2 has a base end 65a rotatably supported by a shaft 66 on a first lever 65, and an inner side surface 51b located on the left side in FIG. And a second lever 68. The swing end 68b of the second lever 68 has a free end 65 of the first lever 65.
b is pin-coupled, and defines the open position of the opening / closing lid 52. A square opening 52c is formed in the center of the opening / closing lid 52, and the opening 52c is formed by the pressing member 52d.
It is closed by the glass G pressed from the back side of the lid.

The music box chamber 100 is formed between the opening / closing lid 52 and the intermediate substrate 10 thus supported, and the sound emitting chamber 200 is formed between the intermediate substrate 10 and the bottom plate 510. On the upper part of the front part 511 of the box main body 51, a recess 69 is formed that is large enough to catch the fingertip of a music box operator (not shown). An opening 70 communicating with the sound output chamber 200 is formed in the lower portion of the front surface portion 511. The opening 70 constitutes a sound emission port for guiding the sound of the music box unit 9 to the outside of the box body 510. A drawer 71 having a bottom plate 71 a is provided in the opening 70.
Is slidably inserted, and by sliding the drawer 73 to close or open the opening 70, it is possible to adjust the volume of the sounding sound from the music box unit 9 leaking to the outside.

The disk 3 is provided with a hole 2 formed by punching or pressing so as to correspond to a song to be played, and a center hole 3a. The disk 3 is made of hard paper. A flexible film, plastic, or the like may be used as the material of the disk 3.

As shown in FIGS. 3 and 4, the music box unit 9 has a drive unit 8 equipped with a ratchet wheel unit 4, a diaphragm 5, an arm shaft 6, and a motor 7 as an electric drive source mounted on a frame 9A. There is. The frame 9A of the music box unit 9 is made of metal and has a function of resonating the vibration sound of the diaphragm 5. This frame 9A has a metal base plate 9
B is fixed, and a central shaft 17 that is inserted into the central hole 3a of the disk 3 and rotatably supports the disk 3 is erected on the main plate 9B. The music box unit 9 is arranged on the intermediate substrate 10 with the center axis 17 arranged on the center line O and the arm shaft 6 orthogonal to the center line O, and is fixed by screws or the like not shown.

The ratchet 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. 5, 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. 6, the ratchet wheel 11 is formed with a plurality of (four in this case) claw portions 11a 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 curved surface 11 of the tip 5b of the vibration valve 5a.
It is designed to be played on the b side. Pitch angle θ of claw 11a
Means that the straight portion 11c of the claw portion 11a is the upper surface 5c of the vibration valve 5a.
In the initial state of the ratchet wheel 11 that abuts on the disk 3, the other claw portion 11a that is not in contact with the vibration valve 5a with respect to the disk 3 is set at an angle that does not result in a vertical state.

As shown in FIG. 7, 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. This diaphragm 5
The vibrating valves 5a have the same number as the number of the ratchet wheels 11 and are arranged so that the claw portions 11a can be engaged with the tips 5b of the vibrating valves 5a.

A drive gear 13 is press-fitted into the support shaft 12 as shown in FIG. 4, and can rotate integrally with the support shaft 12. A drive roller 14 is provided on the shaft portion 13 a of the drive gear 13. This drive roller 14 is
The disk 3 is brought into contact with the lower surface 3b of the outer periphery of the disk 3 to rotate the disk 3 by a frictional force.

A column 18 is erected on the frame 9A outside the rotation range of the disk 3. The base end 6 a of the arm shaft 6 is rotatably attached to the column 18. The arm shaft 6 is disposed above the support shaft 12 so as to face each other,
A plurality of disc pressing rollers 19 are provided. The disc pressing roller 19 is formed on each of a plurality of collars 20 rotatably inserted through the arm shaft 6,
While being restricted from moving in the axial direction, they are held rotatably at appropriate intervals. This plurality of disc pressing rollers 1
9 is arranged so as to be located between the ratchet wheels 11,
When the disk 3 is not mounted, it can come into contact with the outer peripheral surface of the spacer 12a, and prevents the arm shaft 6 from excessively falling.

Of the plurality of disc pressing rollers 19, the disc 3
The disk pressing roller 19A arranged on the outer peripheral side of the disk 3 is arranged close to the drive roller 14 while being displaced in the radial direction of the disk 3. When the disc 3 is not attached, the disc pressing roller 19A comes into contact with the drive roller 14 in a state where the center thereof is displaced in the axial direction. The diameters of the disc pressing roller 19A and the driving roller 14 are set so as to slightly overlap each other in the roller radial direction when the disc 3 is not interposed between them.

At the tip 6b of the arm shaft 6, a central shaft 17 is provided.
A locking lever 21 that engages with is disposed. The locking lever 21 is rotatably supported by a pin 23 on a long side portion 22A of a bracket 22 having an L-shaped cross section, which is fixed to the tip portion 6b. The locking lever 21 has a swinging habit in a direction of engaging with a groove 17a formed in the central shaft 17 by a torsion coil spring 24 wound around a pin 23 with both ends locked by the bracket 22 and the locking lever 21. Has been granted.
A hole 22a that loosely fits the central shaft 17 is formed in the long side portion 22A. 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 taper portion when loosely fitting the hole 22a.

The groove 17a is provided at a position for holding the support shaft 12 supporting the ratchet wheel 11 and the arm shaft 6 substantially parallel to each other when locked with the locking lever 21. Arm axis 6
When placed on the central shaft 17 in a locked state, the disc 3 is sandwiched between the disc pressing roller 19 and the drive roller 14 to apply an appropriate pad pressure. That is, the disc pressing roller 19 presses the disc 3 in order to prevent the disc 3 made of a paper plate from bending and escaping from the ratchet 11 when the disc 3 rotates and rotates the ratchet 11 in the hole 2. It is a thing.

As shown in FIG. 8, the drive unit 8 includes a worm gear 25 fixed to the shaft 7a of the motor 7, a worm wheel 27 that meshes with the worm gear 25 at right angles,
The worm wheel 27 is integrally rotatable with the worm wheel 27, and includes a pinion gear 28 that 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 motor 7 is also fixed to the bracket 26. The drive unit 8 decelerates the rotation of the 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.

As shown in FIG. 2, the intermediate substrate 10 has a switch 53 for turning on / off the motor 7, a speed adjusting switch 54 for adjusting the rotation speed of the disk 3, and a power supply 55.
Is covered with a detachable cover 57 with respect to the box body 51. An opening 57a is formed in the cover 57, and the switch 53 and the speed adjustment switch 54 are exposed to the outside through the opening 57 and can be operated.

The switch 53 and the speed adjusting switch 54 shown in FIG. 2 are provided in the control circuit section 56 to which the motor 7 and the power source section 55 are connected and serve as a music box operating system. When the switch 53 is in the neutral position shown in FIG. 2, the motor 7 is turned off. When the switch 53 is operated in the direction indicated by the arrow Fo from this position, the motor 7 rotates forward, and when the switch 53 is operated in the direction R, the motor 7 rotates reversely. This is a changeover switch. Here, the forward rotation refers to the direction in which the disc 3 is rotated in the ringing direction indicated by the arrow a, and the reverse rotation is the direction in which the disc 3 is rotated in the direction indicated by the arrow b, as well as the ratchet wheel 11 to be described later. So that the initial position is shown in FIG.
Indicates the direction in which the support shaft 12 is driven so as to rotate in the direction of arrow d.

The speed adjusting switch 54 is composed of a well-known variable resistor for adjusting the amount of voltage supplied to the motor 7. When the speed adjusting switch 54 is rotated in the direction of arrow S, the rotation speed of the motor 7 is lowered and the speed is adjusted in the direction of arrow F. By doing so, the rotation speed of the motor 7 is increased.

As shown in FIGS. 1 and 2, struts 58 and 59 for bending the disk 3 set in the music box unit 9 toward the upper part of the box body 51 are erected and fixed on the intermediate substrate 10. . The struts 58, 59 are arranged on the center line O and have a spherically-shaped tip 58.
a and 59a are in contact with the outer peripheral lower surface 3b of the disk 3.

The operation of the disc type music box 1 having such a configuration will be described. First, in order to set the ratchet wheel 11 to the initial position, the switch 53 is operated in the R direction to rotate the motor 7 in the reverse direction. Then, the support shaft 12 rotates in the reverse direction and each ratchet wheel 1
1 by the action of the friction plate 12a arranged between
Simultaneously rotate in the direction of arrow d as shown in FIG.
The claw portion 11a comes into contact with a from above. Due to this contact, the rotation of the ratchet wheel 11 is hindered, and the ratchet wheels 11 placed in different positions are brought into contact with the diaphragm 5 in an aligned state as shown by the two-dot chain line in FIG. Claw portion 11a of the ratchet wheel 11
The pitch angle θ of is set to an angle at which the other claws 11a are not perpendicular to the disc 3 in the initial state. Therefore, by setting the claws 11a to the initial state before the disc 3 is mounted,
Damage to the disk 3 due to a can be extremely reduced,
The durability of the disc 3 is improved.

After completing the initial setting, the center hole 3 of the disk 3 is
After inserting b into the central shaft 17, the arm shaft 6 is shown in FIG.
It is rotated in the direction of arrow c from the open state shown by the dotted line. Then, when the hole 22b of the bracket 22 and the central shaft 17 are fitted together, the tip end of the locking lever 17 is urged into the groove 17a so that the arm shaft 6 is substantially parallel to the support shaft 12. Retained. Then, the disc pressing roller 19 holds the disc 3 from above while holding the disc 3 between the disc pressing roller 19A and the drive roller 14.

When the arm shaft 6 is held on the central shaft 17, the columns 58 and 59 arranged on the same center line O as the shaft.
As a result, the edge 3b of the disk 3 is curved upward as shown in FIG. At this time, since the disc 3 is sandwiched between the disc pressing roller 19 and the ratchet wheel 11 as shown in FIG. 7, the disc 3 is curved around the portion 3R sandwiched between the both, so The disk portion 3R located between the roller 19 and the ratchet wheel 11 is a horizontal surface. That is, since the disk 3 is made of a paper material here, if the disk 3 is simply arranged in a plane on the central shaft 17, the outer peripheral side 3b is lowered or corrugated, so that the ratchet wheel 11 and the hole 2 are satisfactorily operated. It is possible that they do not engage. However, the arm shaft 6
By lifting the outer peripheral portion 3b of the disc 3 orthogonal to the support shafts 58 and 59, the disc portion 3 between the arm shaft 6 and the ratchet wheel 1 is lifted.
Since the linear flat surface portion is formed in R, the hole 2 and the ratchet wheel 11 are formed.
The engagement with is reliable. The disk 3 is moved by the operation of this arm shaft 6.
The mounting operation of is completed.

Next, the switch 53 is operated in the direction of the arrow Fo to rotate the motor 7 in the forward direction to change the open / close lid 52 from the open state shown by the two-dot chain line in FIG. 1 to the closed state shown by the solid line, and pull out the drawer 70. The opening 70 is opened. Then
The rotation of the motor 7 is decelerated and transmitted to the drive gear 13 to rotate the integral drive roller 14 and the support shaft 12. When the drive roller 14 rotates, the disk 3 rotates in the ringing direction indicated by the arrow a in FIG. 1, and at the same time, the frictional force between the support shaft 12 and the spacer 12a causes the ratchet wheel 11 to move in the direction indicated by the arrow b in FIG. Torque is applied to the. However, since the disc 3 is located above the ratchet 11, the rotation of the ratchet 11 is suppressed by the unperforated portion of the disc 3 here.

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 ratchet wheels 11 jump into the holes 2 respectively. 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 tunes one after another.

At this time, since the opening / closing lid 52 is closed, the sound of the music box played in the music box chamber 100 is in communication with the sound output chamber 200.
Is transmitted to the outside of the box 50, and the sound dropout is improved. On the other hand, the frictional noise caused by the sliding contact between the columns 58 and 59 and the disk 3 and the noise caused by the driving of the motor 7 are
It stays muddy and does not leak outside.

Therefore, since frictional noise and noise are less likely to be transmitted to the outside of the box 50, the sound quality of the music box is improved. Further, since the sound of the music box is transmitted to the outside through the opening 70, the volume is not extremely reduced as in the conventional case even when the opening / closing lid 52 is closed. Further, when the drawer 71 is slid, the opening 7 of the drawer 71 protruding from the opening 70
Since the area of 1b changes, the volume of the music box sound transmitted from the opening 70 can be adjusted. Moreover, since the opening / closing lid 52 allows the inside of the music box chamber 100 to be seen through the glass G, even if it is closed, the operation of the disk 3 and the music box unit 9 can be enjoyed.

By the way, in the above embodiment, the opening 70 for slidably storing the drawer 71 is used as the sound output port, but there is also a disc type music box without the drawer 71. In this case,
As shown in FIG. 9, side surface portions 512 and 513 of the box body 51
In addition, a plurality of sound emission holes 72 that communicate the sound emission chamber 200 and the outside of the box body 51 are formed. Then, the sound emission holes 72 are covered with the breathable cloth member 73 from inside the sound emission chamber 200.

With such a configuration, the music box chamber 1
The sound emitted from the music box unit 9 provided in 00 is
The sound is transmitted from the sound output hole 72 to the outside of the box main body 51 to improve sound release, and a sufficient volume can be secured. In addition, noise due to the driving of the music box unit 9 and frictional noise due to the sliding contact between the disk 3 and the columns 58 and 59 can be contained in the music box chamber 100, and the sound quality can be improved while ensuring the volume. Further, since the sound output hole 72 is closed by the breathable cloth material 73, dust and the like can be prevented from entering the sound output chamber 200 from the outside, and the sound output hole 72 looks good.

The shape of the sound output hole 72 in this embodiment is as follows.
As shown in FIG. 9, the shape is a circle or an ellipse, but it is not limited to this. For example, if an opening imitating a flower flyer or an opening having a geometric pattern is formed as a sound emission hole, a box is formed. Body 51
Can also be used as a pattern. In this way, the design range of the disc-type music box 1 is widened by using the sound emission hole and the pattern in common.

In the disk-type music box 1 having the drawer 71 shown in FIG. 1, the bottom plate 510 is provided on the box body 51, but the bottom plate 510 is eliminated by using the bottom plate 71a of the drawer 71 as the bottom plate of the box body 50. be able to. In this case, as shown in FIG. 10, a rail portion 74 protruding inward is formed at the bottom of the box body 51, and the drawer 71 is formed.
A sound output hole 75 is formed at the bottom by guiding the sliding movement.

As described above, when the bottom plate 510 is removed, the music box chamber 100 is closed even when the drawer 71 is closed.
The sound emitted from the music box unit 9 in the box body 5
Even if the sound is transmitted to the outside from the sound output hole 75 provided in the bottom portion of the No. 1 and the drawer 71 is not drawn to open the opening 70, sound can be released well. This is effective for reducing the intrusion of dust, foreign matter, and the like into the drawer 71 during sounding while ensuring the volume of the music box sound.

Further, in the disk-type music box 1 in all the above-mentioned embodiments, by providing the opening 70 and the sound output holes 72, 75, it is possible to secure a sufficient volume even when the opening / closing lid 51 is closed. , Music box room 1
It is possible to prevent intrusion of dust, foreign matter, and the like into 00, and the possibility that the disk 3 and the music box unit 9 are damaged by them is extremely reduced.

[0037]

According to the first aspect of the present invention, when the sound is played with the opening / closing lid closed, noises and the like due to the driving of the music box unit stay in the music box room, and the sound of the sound is emitted from the sound room. It is transmitted to the outside through the hole. Therefore, when the sound is played with the opening / closing lid closed, it is possible to hear the sound with a sufficiently small amount of noise and a sufficient volume. Further, since a sufficient volume can be secured even when the player makes a sound by closing the opening / closing lid, it is possible to extremely reduce the intrusion of foreign matter into the music box chamber during the sounding.

According to the second aspect of the invention, since the opening for inserting the detachable drawer into the sound emitting chamber is the sound emitting hole, in addition to the effect of the first aspect of the invention, The volume can be adjusted by adjusting the volume. According to the invention described in claim 3, since the sound output hole is closed by the breathable cloth member, in addition to the effect of the invention described in claim 1, it is possible to prevent dust and the like from entering through the sound output hole. According to the invention described in claim 4, since the sound output hole is part of the pattern on the side surface of the box, in addition to the effect of the invention described in claim 3, the design of the box can have a width, The appearance of the disc-type music box is improved.

[Brief description of drawings]

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

FIG. 2 is a plan view showing a schematic configuration of a disc-type music box.

FIG. 3 is a plan view showing a configuration of a music box unit.

FIG. 4 is a front view showing the configuration of the music box unit and the operation of the arm shaft.

FIG. 5 is a partially cutaway enlarged view showing a mounting state of the ratchet wheel.

FIG. 6 is a front view showing the configuration and operation of the ratchet wheel.

FIG. 7 is a sectional view of a music box unit.

FIG. 8 is an enlarged plan view showing the configuration of a drive mechanism.

FIG. 9 is a side sectional view of a disk-type music box in which a modification of a sound output hole is implemented.

FIG. 10 is a partially cutaway front view of a disk-type music box in which another modification of the sound output hole is carried out.

[Explanation of symbols]

 1 disk type music box 3 disk 7 electric drive source 9 music box unit 10 intermediate board 50 box 51 box body 52 open / close lid 70, 72, 75 sound emission hole 71 drawer 73 cloth member 100 music box room 200 sound emission room 512, 513 side surface

Claims (4)

[Claims] 1. A disc-shaped music box in which a music box unit driven by an electric drive source is provided in a box having an opening / closing lid, and a disk corresponding to a piece of music is set in the music box unit to play a sound. An intermediate substrate is provided on the main body, and the opening / closing lid side of the box body from the intermediate substrate is a music box chamber, and the box body side adjacent to the music box chamber via the intermediate substrate is a sound emitting chamber and is divided into two chambers. A disc-type music box, wherein the music box unit and the disc are arranged on the side of the music box, and a sound emission hole communicating with the outside is provided in the sound emission chamber. 2. A box located on the side of the sound emitting chamber is provided with an opening for inserting a detachable drawer with respect to the sound emitting chamber, and the opening is used as the sound emitting hole. Claim 1
Disc-type music box described. 3. The disc-type music box according to claim 1, wherein the sound output hole is formed on a side surface of the box, and the sound output hole is closed by a cloth member having air permeability. 4. The disk-type music box according to claim 3, wherein the sound output hole is a part of a pattern on a side surface of the box.