KR20230000515U - Paper orgel apparatus having auto play feature implemented with low noise - Google Patents

Abstract

The present invention proposes a paper music box device having an automatic play function. A music box device according to an embodiment of the present invention includes a housing having a predetermined space therein and having an inlet through which a sheet is inserted and an outlet through which the sheet is discharged; a plate-shaped base portion located inside the housing; a sound generating unit located above the base unit and generating a sound determined by the sheet introduced through the inlet; a motor located above the base unit and transmitting a driving force to the sound generating unit; And a base fixing portion for fixing the base portion. At this time, the base fixing portion is located at a position corresponding to the edge portion of the circumferential portion of the base portion.

Description

Paper music box device having an automatic playback function realized with low noise {PAPER ORGEL APPARATUS HAVING AUTO PLAY FEATURE IMPLEMENTED WITH LOW NOISE}

The present invention relates to a paper music box device having an automatic playback function realized with low noise.

In general, a music box (Orgel) is also referred to as a jimyeongeum (自鳴琴), and is a kind of music toy in which a specific sound is played. Initially, music boxes were used in alarm clocks that automatically tell the time in medieval Europe, and a device called 'carillon' that plays melodies was created using this principle, and this is the current music box.

Music boxes were mainly used for watches, cigarette boxes, or jewelry boxes for storing jewelry such as rings and necklaces, and currently, their uses are diversifying, such as children's toys, accessories, and gift accessories.

The music box is composed of a vibrating unit in which each vibration pin having a different effective length according to the pitch of the sound is formed, and a striking drum with a plurality of striking protrusions formed along the circumference. As the instrument is played by bouncing it, the sound is output.

On the other hand, in this regard, Korean Patent Registration No. 10-1522176 (name of design: music box device) is rotatably coupled to the body and has a plurality of striking protrusions provided on the surface to be coupled and separated, and the drum module Disclosed is a configuration including a driving unit coupled to the body to transmit rotational force, a sound generating unit provided to generate sound according to the impact of the hitting protrusion when the drum module rotates, and a control unit provided to control the operation of the sound generating unit.

However, such a conventional music box device has a problem in that the sound generating unit is fixed to the housing through a screw, so that noise caused by vibration of the driving unit is amplified in the housing and noise is generated when sound is generated.

The present invention is to solve the problems of the prior art described above, and the sound generating unit is not fixed to the housing using a separate fastening member, but is fastened in a separate fastening method to automatically reproduce noise due to rotation of the motor. It is an object of the present invention to provide a paper music box device having a function.

However, the technical problem to be achieved by the present embodiment is not limited to the technical problems described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, the paper music box device having an automatic playback function according to an embodiment of the present invention has a predetermined space formed therein, and an inlet through which sheets are inserted and an outlet through which sheets are discharged. formed housing; a plate-shaped base portion located inside the housing; a sound generating unit located above the base unit and generating a sound determined by the sheet introduced through the inlet; a motor located above the base unit and transmitting a driving force to the sound generating unit; And a base fixing portion for fixing the base portion. At this time, the base fixing portion is located at a position corresponding to the edge portion of the circumferential portion of the base portion.

According to the above-described problem solving means of the present application, the base portion to which the sound generating unit is fixed is fixed to the housing through the fastening portion formed in the housing, and there is a gap between the base portion and the fastening portion, so that noise due to rotation of the motor can be minimized. can be greatly improved.

Specifically, the base part implemented in the form of a plate is fixed by bent fastening parts formed on opposite sides of the housing, and at this time, the fixing is fixed to include a gap at a predetermined interval. If the base part is completely in close contact with the housing without any play, the vibration of the motor inside the housing is transmitted to the housing as it is, and as a result, noise caused by the motor vibration may be exposed as it is. However, when implemented as in one embodiment of the present invention, noise can be prevented from being amplified inside the housing. That is, since the base part primarily absorbs the motor vibration, and the clearance part within 0.5 mm secondarily offsets the transfer of the motor vibration to the housing, noise can be much reduced compared to the conventional music box.

1 is a perspective view of a paper music box device having an automatic playback function according to an embodiment of the present invention.
2 is an exploded perspective view of a paper music box device having an automatic playback function according to an embodiment of the present invention.
3 is a perspective view of a diaphragm according to an embodiment of the present invention.
4 is a perspective view of internal components of a paper music box device having an automatic playback function according to an embodiment of the present invention.
5 is a perspective view of FIG. 4 viewed from another side.
6 is a diagram for explaining a driving unit according to an embodiment of the present invention.
7 is a cross-sectional view of a paper music box device having an automatic playback function according to an embodiment of the present invention.
8 is a view for explaining how a sheet is inserted into and operated in a paper music box device having an automatic playback function according to an embodiment of the present invention.
9 is a cross-sectional view of a motor gear unit according to an embodiment of the present invention.
10 and 11 are cross-sectional views of a paper music box device having an automatic playback function according to an embodiment of the present invention.
12 is an enlarged view of A in FIG. 10;

Hereinafter, embodiments of the present application will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. And in order to clearly describe the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is said to be "connected" to another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element in between. do.

Throughout the present specification, when a member is said to be located “on” another member, this includes not only a case where a member is in contact with another member, but also a case where another member exists between the two members.

Throughout the present specification, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated. As used throughout this specification, the terms "about," "substantially," and the like are used at or approximating that value when manufacturing and material tolerances inherent in the stated meaning are given, and do not convey the understanding of this application. Accurate or absolute figures are used to help prevent exploitation by unscrupulous infringers of the disclosed disclosure. The term "step of (doing)" or "step of" as used throughout the present specification does not mean "step for".

The present application relates to a music box device.

Hereinafter, referring to FIGS. 1 to 12 , a paper music box device 10 (hereinafter, referred to as 'music box device 10') having an automatic playback function according to an embodiment of the present application will be described.

Referring to FIG. 1, the music box device 10 has an inlet 110 and an outlet 120 formed in the housing 100, and a sheet 20 is put in through the inlet 110, and through the outlet 120 A music box device (10) in which different sounds are generated depending on the sheet (20) while the sheet (20) is ejected.

The housing 100 has a predetermined space formed therein, and an inlet 110 into which the sheet is inserted and an outlet 120 through which the sheet is discharged are formed. Illustratively, as shown in FIG. 1 , the housing 100 may be formed in a rectangular parallelepiped shape, but is not limited thereto and may be formed in various shapes such as a cylindrical shape and a polygonal column shape. In addition, the inlet 110 and the outlet 120 may be formed to face each other.

In addition, a charging terminal (not shown) capable of charging a battery unit (not shown) located inside the housing 100 to be described later is formed on the outer circumferential surface of the housing 100, and the battery unit can be charged through the charging terminal. can

Referring to FIG. 2 , the housing 100 includes a body portion 101 and a cover portion 102, and a single housing 100 is formed by combining the body portion 101 and the cover portion 102 with each other. can Also, parts for operating the music box device 10 may be mounted inside the housing 100 .

The music box device 10 includes a housing 100, a base part 200, a sound generating part, a driving part 700, a driving gear part 800, base fixing parts 910 and 920, and a controller (not shown). do. At this time, the sound generating unit includes a vibrating unit 300, a percussion drum 500, and a press shaft 600.

As shown in FIG. 2 , the base portion 200 may be located inside the housing 100 and formed in a plate shape. In addition, the vibrating part 300, the hitting drum 500, the press shaft 600, and the driving part 700 are disposed on the upper part of the base part 200, so that assembly is easy. Illustratively, the base part 200 may be coupled to and fixed to the base fixing parts 910 and 920 formed inside the housing 100 . A detailed description of this will be described later.

Referring to FIGS. 2 and 3 , the vibration unit 300 is disposed above the base unit 200 and a plurality of vibration pins 310 are arranged. In addition, each of the vibration pins 310 may be sequentially manufactured to have different lengths to emit different sounds.

4 and 5, the hitting drum 500 has a drum shaft 530 and a plurality of hitting protrusions 511 hitting each vibration pin 310 along the circumference, and the drum shaft 530 A plurality of hitting wheels 510 arranged at regular intervals along the longitudinal direction, and a guide roller 520 disposed between the hitting wheels 510 and fixed to the drum shaft 530. At this time, each hitting wheel 510 is located at a position corresponding to the vibration pin 310, and the number of hitting wheels 510 may have the same number as the number of vibration pins 310.

In addition, one end of the drum shaft 530 may be rotatably fixed to the first fixing part 430 and the other end may be rotatably fixed to the motor fixing part 720 . At this time, the guide roller 520 is fixed to the drum shaft 530, and when the drum shaft 530 is rotated, it can be rotated together.

The press shaft 600 may include press wheels 610 positioned above the percussion drum 500 and spaced apart from each other at predetermined intervals. In addition, the press shaft 600 is rotatably fixed to the first fixing part 430, and the other side may be rotatably fixed to the motor fixing part 720.

In addition, the press wheel 610 serves to move the sheet 20 together with the guide roller 520. In other words, the sheet 20 introduced through the inlet 110 is inserted between the guide roller 520 and the press wheel 610, and moves as the guide roller 520 and the press wheel 610 rotate in opposite directions. can be In addition, the guide roller 520 and the press wheel 610 rotate at the same angular velocity, and thus the sheet 20 can be smoothly discharged. At this time, as the hitting protrusion 511 is inserted into the hole formed in the seat 20 and the hitting wheel 510 rotates, the hitting protrusion 511 strikes the vibration pin 310 so that a predetermined sound can be played.

Referring to FIG. 5 , the driving unit 700 may provide driving force to the percussion drum 500 and the press shaft 600 . In addition, the driving part 700 includes a motor fixing part 720 fixed to the upper part of the base part 200, a motor 710 fixed to the motor fixing part 720, and a driving shaft 730 that transmits driving force of the motor 710. ) may be included. At this time, the motor shaft 711 of the motor 710 and the drive shaft 730 are connected through the motor gear unit 740 so that the driving force of the motor 710 may be transmitted to the drive shaft 730 . The motor fixing part 720 is formed in an 'L' shape, and a lower surface thereof may be fixed to the base part 200 . In addition, the motor fixing part 720 may include a motor support part positioned at a lower part of the motor 710 at a predetermined distance so as to stably support the cylindrical motor 710, and the motor support part has a cylindrical shape. The top may be chamfered to stably support the motor 710 of the.

In addition, the motor fixing part 720 may include a recessed part 721 recessed in a 'U' shape so that the drive shaft 730 passes through the upper central portion. Accordingly, the height of the motor fixing part 720 can be manufactured high, and the motor 710 can be stably supported without interfering with the drive shaft 730 while having sufficient rigidity.

The driving gear unit 800 transmits the driving force of the driving unit 700 to the percussion drum 500 and the press shaft 600 . To this end, the drive gear unit 800 includes a first drive gear 810 connected to the drive unit 700, a second drive gear 820 meshed with the first drive gear 810 and connected to the press shaft 600, and a third driving gear 830 meshed with the second driving gear 820 and connected to the shaft of the motor 710 .

Illustratively, when the power voltage is applied to the motor 710, the first driving gear 810 is rotated counterclockwise, the second driving gear 820 is rotated clockwise, and the third driving gear ( 830) can be rotated counterclockwise. Accordingly, while the press wheel 610 connected to the second drive gear 820 and the guide roller 520 connected to the third drive gear 830 are rotated in opposite directions to each other, the sheet 20 introduced into the inlet 110 can be moved to the outlet 120.

Also, the first driving gear 810, the second driving gear 820, and the third driving gear 830 may have a driving gear ratio of 1.5:1.5:1. In other words, the first drive gear 810 and the second drive gear 820 are formed to have the same drive gear ratio, and the third drive gear 830 is the first drive gear 810 and the second drive gear 820 ) can be formed smaller than Accordingly, the load on the motor 710 can be minimized. The drive gear ratio may be a ratio capable of generating a minimum torque that allows the seat 20 of the music box device 10 to be moved. The sheet 20 introduced through the inlet 110 is moved between the hitting drum 500 and the press shaft 600 through the sheet guide part 400, and the hitting protrusion 511 is inserted into the hole formed in the sheet 20. As the hitting wheel 510 rotates, the hitting protrusion 511 strikes the vibration pin 310 so that a predetermined sound is played. In order for this process to occur, the seat 20 must be able to move with sufficient force. Even if the motor 710 is a low-cost motor sold on the market, when the drive gear ratio is configured as above, sufficient torque (force) can be generated so that the seat 20 can be moved. When a conventional general motor is installed in an auto-playing paper music box device, a motor that generates torque above a threshold does not generate RPM (related to the rhythm of the playing sound) as desired, or a motor that generates RPM as desired has sufficient torque. There was a problem in that the sheet 20 was not automatically reproduced because the sheet 20 did not occur. However, the present invention has the configuration, shape, and combination of the drive gears 810, 820, and 830 as described above, and by configuring the drive gear ratio and the structure of the drive unit as described above, the desired RPM with sufficient torque. can be made playable. That is, even if the user sets a desired RPM and operates the motor accordingly (for example, ballad music or dance music is played), the music box music can be played with sufficient torque. However, the above-described driving gear ratio is only an example, and the driving gear ratio may be configured in various ratios.

In addition, the driving unit 700 may further include a motor gear unit 740 that transmits the driving force of the motor 710 to the driving gear unit 800 . In other words, the motor gear unit 740 may be positioned between the motor shaft 711 of the motor 710 and the driving shaft 730 to transmit the driving force of the motor 710 to the driving shaft 730 through a plurality of gears. .

Referring to FIG. 9 , the motor gear unit 740 includes a first motor gear 741 fixed to a motor shaft 711, a second motor gear 742 meshed with the first motor gear 741, and a second motor. A third motor gear 743 coupled to the same rotational axis as the gear 742 and having a smaller diameter than the second motor gear 742, a fourth motor gear 744 meshed with the third motor gear 743, and a fourth A fifth motor gear 745 coupled to the same rotational axis as the motor gear 744 and having a smaller diameter than the fourth motor gear 744, a sixth motor gear 746 meshed with the fifth motor gear 745, 6 Doedoe coupled to the same rotational axis as the motor gear 746, a seventh motor gear 747 having a smaller diameter than the sixth motor gear 746, an eighth motor gear 748 meshed with the seventh motor gear 747, Doedoe coupled to the same rotating shaft as the eighth motor gear 748, meshed with the ninth motor gear 749 and the ninth motor gear 749 having a smaller diameter than the eighth motor gear 748, and fixed to the drive shaft 730 A tenth motor gear 750 may be included.

In addition, the first motor gears 741 to 10th motor gears 740 may have different diameters of motor gears meshed with each other, and may be formed such that small and large diameters are repeated. That is, the driving force of the motor gear unit 740 is sequentially transmitted from the first motor gear 741 to the tenth motor gear 750, and the diameter may be large or small. Illustratively, the second motor gear 742 has a larger diameter than the first motor gear 741, and the fourth motor gear 744 has a larger diameter than the third motor gear 742. And, the diameter of the sixth motor gear 746 may be larger than the diameter of the fifth motor gear 745, and the diameter of the eighth motor gear 748 may be larger than the diameter of the seventh motor gear 747. there is. Through this, even if the user sets the desired RPM and operates the motor 710 accordingly, the music box music can be played with sufficient torque.

In addition, the first to tenth motor gears are located inside a separate housing to prevent foreign substances from entering between the motor gears from the outside. At this time, the motor shaft 711 and the driving shaft 730 may be installed to pass through a housing having a plurality of motor gears therein.

A controller (not shown) may control the driving unit 700 and supply the power voltage applied through the battery unit to the motor 710 .

The music box device 10 may further include a control unit (not shown) located on an outer circumferential surface of the housing 100 and having a power button, a play button, and a speed control button. In addition, the control unit may be connected to the control unit to turn on/off the motor 710 and adjust the driving speed (RPM) according to a command input by a user.

Hereinafter, referring to FIGS. 7 and 8 , a sheet guide unit 400 according to an embodiment of the present invention will be described.

The music box device 10 may further include a sheet guide unit 400 located above the vibration unit 300 and guiding the sheet 20 inserted through the input hole 110 .

The sheet guide unit 400 includes a plate-shaped lower sheet pressing unit 420 positioned above the vibrating unit 300 and an upper sheet pressing unit located apart from the lower sheet pressing unit 420 by a predetermined distance in the upper direction ( 410), the left ends of the lower sheet pressing part 420 and the upper sheet pressing part 410 are fixed, and the first fixing part 430 and the lower sheet pressing part 420 having lower ends fixed to the base part 200 and a second fixing part 440 having a right end of the upper sheet pressing part 410 fixed and a lower end fixed to the base part 200 . In other words, the sheet guide unit 400 serves to guide the movement of the sheet 20 introduced through the inlet 110 between the press shaft 600 and the striking drum 500 . At this time, the left and right ends of the lower sheet pressing part 420 are fixed to the first fixing part 430 and the second fixing part 440 so as not to move, and the upper sheet pressing part 410 is fixed to the first fixing part 430 And the rear of both side parts can be hinged to the second fixing part 440 .

The upper sheet pressing portion 410 includes an anti-rotation portion 412 bent downward at a predetermined angle to prevent the hitting wheel 510 from being arbitrarily rotated at the end where the hitting wheel 510 is located, As the sheet 20 is put into the sheet guide unit 400, the anti-rotation unit 412 moves the end of the upper sheet pressing unit 410 upward a predetermined distance so that the hitting wheel 510 is rotatable. can be In addition, the upper sheet pressing portion 410 may further include a bending pressing portion 411 whose end is moved upward by the sheet 20 that is partially bent downward and inserted.

In other words, as the sheet 20 is introduced through the inlet 110, the anti-rotation part 412 moves upward while passing through the bending pressing part 411, and the rotation lock state of the hitting wheel 510 is released. And, as the guide roller 520 and the press wheel 610 are rotated, the sheet 20 can be moved at a constant speed. At this time, as the hitting protrusion 511 of the hitting wheel 510 is inserted into the hole arbitrarily formed in the seat 20 and the hitting wheel 510 rotates, sound may be generated as the vibration pin 310 is hit. .

The sheet guide unit 400 may further include a pressing unit 450 that presses the upper sheet pressing unit 410 downward. Accordingly, the anti-rotation unit 412 presses the upper sheet pressing unit 410 through the pressing unit 450 so that the sheet 20 is not moved upward in a state in which the sheet 20 is not inserted, so that the upper sheet pressing unit 410 is hit by external vibration. Rotation of the wheel 510 may be prevented.

Hereinafter, referring to FIGS. 10 to 12, the base fixing parts 910 and 920 according to an embodiment of the present invention will be described in detail.

As described above, the base fixing parts 910 and 920 may be located at positions corresponding to the edges of the circumference of the base part 200, respectively.

In other words, the base fixing parts 910 and 920 are formed in a shape that covers a part of the vertex side surface and a part of the upper surface of the base part 200 together, and the part covering a part of the upper surface has a predetermined distance from the upper surface of the base part 200. It can be formed in a position with a gap.

In addition, when the base part 200 is disposed on the bottom surface inside the housing and the inlet 110 and the outlet 120 are disposed on opposite sides of the housing 100, the base fixing parts 910 and 920 are the inlet 110 and the outlet 120 may be formed extending from the inner surface of the housing 100 formed.

In addition, the base fixing parts 910 and 920 may be formed in an 'L' shape, but are not limited thereto.

In addition, the base part 200 may be fixed to the base fixing parts 910 and 920 so that there is a gap between the base fixing parts 910 and 920 and the base part 200 . In other words, referring to FIG. 6 , when the base part 200 to which the sound generator and the motor 710 are fixed is fixed to the housing 100, the lower surfaces of the base fixing parts 910 and 920 and the base The upper surface of the unit 200 may be positioned to be spaced apart by a predetermined distance (d). At this time, the gap between the base fixing parts 910 and 920 and the base part 200 may be 0.3 mm to 0.7 mm, preferably 0.5 mm. When the gap between the base fixing parts 910 and 920 and the base part 200 is wide, the fixing force by the base fixing parts 910 and 920 decreases, and when they are too close, the motor 710 vibrates to the housing 100 can be forwarded to

Accordingly, the music box device 10 can minimize transmission of vibration due to rotation of the motor 710 to the housing 100, and thus has an effect of delivering high-quality sound to the user.

In addition, the music box device 10 may further include a vibration transmission prevention member (not shown) positioned between the base fixing parts 910 and 920 and the base part 200 . Illustratively, the vibration transmission prevention member may be made of a material capable of minimizing transmission of vibration, such as a sponge. As the vibration transmission prevention member is positioned between the base fixing parts 910 and 920 and the base part 200, transmission of vibrations can be minimized and fixing force can be improved.

Referring to FIG. 2, the housing 100 has a predetermined space formed therein, a body portion 101 having an outlet 120 through which sheets are discharged, and an inlet 110 into which sheets are inserted, and a main body portion. It may include a cover portion 102 coupled to (101). Illustratively, the body portion 101 may be formed in a rectangular parallelepiped shape with one side open, and the cover portion 102 may be coupled to the open portion.

In addition, the base fixing parts 910 and 920 have a first base fixing part 910 extending from the inner surface of the body part 101 where the outlet 120 is formed, and a second base fixing part 910 extending from the inner surface of the cover part 102. A base fixing part 920 may be included.

In other words, when assembling the music box device 10, the base part 200 having the sound generator and the motor 710 fixed thereon is inserted into the body part 101 so that the base part 200 is attached to the first base. After being fixed by the top 910, as the cover part 102 is assembled, the first fixing part 910 and the second fixing part 920 are located at the edge of the circumference of the base part 200 , has the effect of easy assembly.

The above description of the present application is for illustrative purposes, and those skilled in the art will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present application.

10: music box device 20: sheet
100: housing
101: body part 102: cover part
110: inlet 120: outlet
200: base part
300: vibration unit 310: vibration pin
400: seat guide part
410: upper sheet pressing part 411: bending pressing part
412: anti-rotation unit
420: lower seat pressing part
430: first fixing part 440: second fixing part
450: pressing part
500: hitting drum 510: hitting wheel
511: striking protrusion 520: guide roller
530: drum axis
600: press shaft 610: press wheel
700: driving unit
710: motor 720: motor fixing part
721: depression
730: drive shaft
740: motor gear unit
800: drive gear unit 810: first drive gear
820: second driving gear 830: third driving gear
910: first fixing part 920: second fixing part

Claims (11)

In the music box device,
A housing having a predetermined space formed therein and having an inlet into which the sheet is inserted and an outlet through which the sheet is discharged;
a plate-shaped base portion located inside the housing;
a sound generating unit located above the base unit and generating a sound determined by the sheet introduced through the inlet;
a motor located above the base unit and transmitting a driving force to the sound generating unit; and
Including a base fixing part for fixing the base part,
The music box device, wherein the base fixing part is located at a position corresponding to the corner part of the circumferential part of the base part.
According to claim 1,
The music box device, wherein the base part is fixed to the base fixing part so that there is a gap between the base fixing part and the base part.
According to claim 2,
The base fixing part is formed in a shape that covers a part of the side surface and a part of the top surface of the vertex of the base part together,
The music box device of claim 1 , wherein the part covering a part of the upper surface is formed at a position having a predetermined gap with the upper surface of the base part.
According to claim 3,
When the base part is disposed on the bottom surface inside the housing, and the inlet and the outlet are disposed on opposite sides of the housing,
The music box device, wherein the base fixing part extends from the inner surface of the housing in which the inlet and the outlet are formed.
According to claim 3,
The base fixing part is formed in an 'L' shape, the music box device.
According to claim 2,
The music box device, wherein the gap between the base fixing part and the base part is 0.3mm to 0.7mm.
According to claim 2,
The music box device further comprising a vibration transmission preventing member positioned between the base fixing part and the base part.
According to claim 1,
the housing
A body portion having a predetermined space therein and having a discharge port through which the sheet is discharged; and
An inlet into which the sheet is inserted is formed and includes a cover portion coupled to the body portion,
The music box device, wherein the base fixing part includes a first base fixing part extending from an inner surface of the main body portion where the outlet is formed, and a second base fixing part extending from an inner surface of the cover part.
According to claim 1,
the sound generator
a vibrating unit disposed above the base unit and having a plurality of vibrating pins;
A drum shaft and a plurality of hitting protrusions for striking the vibrating pin are formed along the circumference, and are disposed between a plurality of hitting wheels arranged at regular intervals along the length of the drum shaft and the hitting wheel, and the drum shaft a percussion drum having guide rollers fixed thereon;
a press shaft located above the percussion drum and having press wheels spaced apart from each other at predetermined intervals;
a driving gear unit transmitting the driving force of the motor to the percussion drum and the press shaft; and
A music box device comprising a controller for controlling the motor.
According to claim 1,
The music box device further comprising a battery unit for supplying power voltage to the motor.
According to claim 1,
The music box device further comprising a control unit located on an outer circumferential surface of the housing and having a power button, a play button, and a speed control button.

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