KR200497877Y1 - Paper orgel apparatus having auto play feature implemented with low noise - Google Patents

Abstract

The present invention proposes a paper music box device with an automatic playback function. A music box device according to an embodiment of the present invention includes a housing having a predetermined space formed therein and an inlet through which a sheet is input and an outlet through which the sheet is discharged; A plate-shaped base portion located inside the housing; A sound generator located at the top of the base unit and generating a sound determined by the sheet inserted through the inlet; a motor located at the top of the base unit and transmitting driving force to the sound generator; and a base fixing part that fixes the base part. At this time, the base fixing parts are located at positions corresponding to the peripheral corners of the base part.

Description

Paper music box device with automatic play function implemented with low noise {PAPER ORGEL APPARATUS HAVING AUTO PLAY FEATURE IMPLEMENTED WITH LOW NOISE}

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

In general, a music box (Orgel), also known as a music box (自鳴琴), is a type of musical toy that plays specific sounds. Music boxes were first used in medieval Europe in alarm clocks that automatically told the time, and a device called a 'carillon' was created to play melodies using this principle, which is the current music box.

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

The music box consists of a vibrating part formed with vibrating pins of different effective lengths depending on the pitch of the sound, and a striking drum with a plurality of striking protrusions formed along the circumference. As the striking drum rotates by the mainspring, the striking protrusions form the vibrating pins. When played by flicking, sound is output.

Meanwhile, in relation to this, in Republic of Korea Patent No. 10-1522176 (name of the design: music box device), a drum module is rotatably coupled to the body and a plurality of hitting protrusions are provided on the surface to enable coupling and detachment, and a drum module. Disclosed is a configuration that includes a driving unit coupled to the body to transmit rotational force, a sound generator provided to generate sound according to the impact of the striking protrusion when the drum module rotates, and a control unit provided to control the operation of the sound generator.

However, this conventional music box device has a problem in that the sound generating unit is fixed to the housing through a screw, and noise due to vibration of the driving unit is amplified within the housing, thereby generating noise when sound is generated.

The purpose of this application is to solve the problems of the prior art described above, and the sound generator is not fixed to the housing using a separate fastening member, but is fastened using a separate fastening method to provide automatic reproduction that can minimize noise caused by rotation of the motor. The purpose is to provide a paper music box device with functions.

However, the technical challenges that this embodiment aims to achieve are not limited to the technical challenges described above, and other technical challenges may exist.

As a technical means for achieving the above-described technical problem, a paper music box device with an automatic playback function according to an embodiment of the present invention has a predetermined space formed inside, an inlet through which sheets are input, and an outlet through which sheets are discharged. formed housing; A plate-shaped base portion located inside the housing; A sound generator located at the top of the base unit and generating a sound determined by the sheet inserted through the inlet; a motor located at the top of the base unit and transmitting driving force to the sound generator; and a base fixing part that fixes the base part. At this time, the base fixing parts are located at positions corresponding to the peripheral corners of the base part.

According to the means for solving the problem of the present application described above, the base part on which the sound generator is fixed is fixed to the housing through a fastening part formed in the housing, and there is a gap between the base part and the fastening part, which has the effect of minimizing noise due to rotation of the motor. It can be greatly improved.

Specifically, the base portion implemented in the form of a plate is fixed by bent fastening parts formed on both opposing sides within the housing, and at this time, the fixation is fixed to include a predetermined clearance. If the base part is in complete contact with the housing without any clearance, the vibration of the motor inside the housing is directly transmitted to the housing, and as a result, noise caused by the motor vibration may be exposed as is. However, when implemented as in one embodiment of the present invention, noise can be prevented from being amplified inside the housing. In other words, since the base primarily absorbs motor vibration and the clearance within 0.5 mm secondarily cancels out the transmission of motor vibration to the housing, noise can be reduced significantly compared to a conventional music box.

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

Below, with reference to the attached drawings, embodiments of the present application will be described in detail so that those skilled in the art can easily implement them. However, the present application may be implemented in various different forms and is not limited to the embodiments described herein. In order to clearly explain the present application in the drawings, parts that are not related to the description are omitted, and similar reference numerals are assigned 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 where it is “directly connected,” but also the case where it is “electrically connected” with another element in between. do.

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

Throughout the specification of the present application, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary. As used throughout this specification, the terms “about,” “substantially,” and the like are used to mean at or close to that value when manufacturing and material tolerances inherent in the stated meaning are given, and are used to convey the understanding of the present application. Precise or absolute figures are used to assist in preventing unscrupulous infringers from taking unfair advantage of stated disclosures. The term “step of” or “step of” as used throughout the specification does not mean “step for.”

This application relates to a music box device.

Hereinafter, with reference to FIGS. 1 to 12, a paper music box device 10 (hereinafter referred to as 'music box device 10') with 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, so that the sheet 20 is input through the inlet 110 and is discharged through the outlet 120. It relates to a music box device (10) that generates different sounds depending on the sheet (20) as the sheet (20) is discharged.

The housing 100 has a predetermined space formed therein, and an inlet 110 through which sheets are input and an outlet 120 through which sheets are discharged are formed. By way of example, the housing 100 may be formed in a rectangular parallelepiped shape as shown in FIG. 1, but is not limited thereto and may be formed in various shapes such as a cylindrical shape or a polygonal column shape. Additionally, the inlet 110 and outlet 120 may be formed to face each other.

In addition, a charging terminal (not shown) is formed on the outer peripheral surface of the housing 100 to charge the battery unit (not shown) located inside the housing 100, which will be described later, so that the battery unit can be charged through the charging terminal. You can.

Referring to FIG. 2, the housing 100 includes a main body 101 and a cover 102, and the main body 101 and the cover 102 are combined to form one housing 100. You can. Additionally, components 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 unit 200, a sound generating unit, a driving unit 700, a driving gear unit 800, a base fixing unit 910, 920, and a control unit (not shown). do. At this time, the sound generator includes a vibration unit 300, a percussion drum 500, and a press shaft 600.

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

Referring to Figures 2 and 3, the vibrating unit 300 is disposed on the upper part of the base part 200, and a plurality of vibrating pins 310 are arranged. Additionally, each vibrating pin 310 may be sequentially manufactured to different lengths so as to emit different sounds.

Referring to Figures 4 and 5, the hitting drum 500 has a drum shaft 530 and a plurality of hitting protrusions 511 that hit each vibrating pin 310 formed along the circumference, and the drum shaft 530 It is provided with a plurality of striking wheels 510 arranged at regular intervals along the longitudinal direction, and a guide roller 520 disposed between the striking wheels 510 and fixed to the drum shaft 530. At this time, each striking wheel 510 is located at a position corresponding to the vibrating pin 310, and the number of striking wheels 510 may be the same as the number of vibrating pins 310.

Additionally, one end of the drum shaft 530 may be rotatably fixed to the first fixing part 430, and the other side 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 can rotate together when the drum shaft 530 rotates.

The press shaft 600 is located on the upper part of the hitting drum 500 and may be provided with press wheels 610 spaced apart from each other at a predetermined interval. Additionally, the press shaft 600 may be rotatably fixed to the first fixing part 430, and the other side may be rotatably fixed to the motor fixing part 720.

Additionally, 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 Additionally, the guide roller 520 and the press wheel 610 rotate at the same angular speed, and thus the sheet 20 can be smoothly discharged. At this time, the striking protrusion 511 is inserted into the hole formed in the sheet 20, and as the striking wheel 510 rotates, the striking protrusion 511 strikes the vibrating pin 310, so that a predetermined sound can be played.

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

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

The driving gear unit 800 transmits the driving force of the driving unit 700 to the striking drum 500 and the press shaft 600. For this purpose, the driving gear unit 800 includes a first driving gear 810 connected to the driving unit 700, a second driving gear 820 meshed with the first driving gear 810 and connected to the press shaft 600, And it may include a third drive gear 830 engaged with the second drive gear 820 and connected to the shaft of the motor 710.

For example, when applying the power voltage to the motor 710, the first driving gear 810 rotates counterclockwise, the second driving gear 820 rotates clockwise, and the third driving gear ( 830) can be rotated counterclockwise. Accordingly, the press wheel 610 connected to the second driving gear 820 and the guide roller 520 connected to the third driving gear 830 rotate in opposite directions, and the sheet 20 introduced into the inlet 110 can be moved to the outlet 120.

Additionally, 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 driving gear 810 and the second driving gear 820 are formed to have the same driving gear ratio, and the third driving gear 830 is formed with the first driving gear 810 and the second driving gear 820. ) can be formed smaller than that. Accordingly, the load on the motor 710 can be minimized. The driving gear ratio may be a ratio capable of generating a minimum torque that allows the seat 20 of the music box device 10 to move. The sheet 20 introduced through the inlet 110 is moved between the striking drum 500 and the press axis 600 through the sheet guide part 400, and the striking protrusion 511 is inserted into the hole formed in the sheet 20. As the striking wheel 510 rotates, the striking protrusion 511 strikes the vibrating pin 310 to play a predetermined sound. In order for this process to occur, the sheet 20 must be able to move with sufficient force. Even if the motor 710 is a low-cost motor sold commercially, if the driving gear ratio is configured as above, it can generate sufficient torque (force) to move the sheet 20. When a conventional general motor is mounted on an automatically playing paper music box device, a motor that generates torque above the threshold may not generate RPM (related to the beat of the playing sound) as desired, or a motor that generates RPM as desired may not generate sufficient torque. There was a problem in that the sheet 20 was not automatically regenerated because it did not occur. However, in the present invention, the configuration, shape, and combination of the driving gears 810, 820, and 830 are provided as described above, and the driving gear ratio and structure of the driving part are configured as described above, so that the driving gears 810, 820, and 830 are configured as described above, It can be played. In other words, even if the user sets the desired RPM and operates the motor accordingly (for example, even if ballad music or dance music is played), music box music can be played with sufficient torque. However, the above-mentioned driving gear ratio is only an example, and the driving gear ratio may be configured at 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 is located between the motor shaft 711 and the drive shaft 730 of the motor 710, and can transmit the driving force of the motor 710 to the drive shaft 730 through a plurality of gears. .

Referring to FIG. 9, the motor gear unit 740 includes a first motor gear 741 fixed to the 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 rotation axis as the gear 742 but having a diameter smaller than that of the second motor gear 742, a fourth motor gear 744 engaged with the third motor gear 743, and a fourth motor gear 744 engaged with the third motor gear 743. A fifth motor gear 745 coupled to the same rotation axis as the motor gear 744 but having a diameter smaller than that of the fourth motor gear 744, a sixth motor gear 746 meshed with the fifth motor gear 745, 6 A seventh motor gear 747 coupled to the same rotation axis as the motor gear 746 but having a diameter smaller than that of the sixth motor gear 746, an eighth motor gear 748 meshed with the seventh motor gear 747, It is coupled to the same rotation axis as the eighth motor gear 748, but meshes with the ninth motor gear 749 and the ninth motor gear 749 with a diameter smaller than that of the eighth motor gear 748, and is fixed to the drive shaft 730. It may include a tenth motor gear 750.

In addition, the first to tenth motor gears 741 to 740 have different diameters of motor gears meshing with each other, and may be formed to repeatedly have small and large diameters. That is, the motor gear unit 740 sequentially transmits driving force from the first motor gear 741 to the tenth motor gear 750, and can be formed to alternate between large and small diameters. For example, the diameter of the second motor gear 742 is formed to be larger than the diameter of the first motor gear 741, and the diameter of the fourth motor gear 744 is formed to be larger than the diameter of the third motor gear 742. 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, music box music can be played with sufficient torque.

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

The control unit (not shown) controls the driving unit 700 and can 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 the outer peripheral surface of the housing 100 and including a power button, a playback button, and a speed control button. Additionally, the control unit is connected to the control unit and can control the on/off and driving speed (RPM) of the motor 710 according to commands input by the user.

Hereinafter, with reference to FIGS. 7 and 8, the 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 that is located on the upper part of the vibrating unit 300 and guides the sheet 20 inserted into the input port 110.

The sheet guide unit 400 includes a plate-shaped lower sheet pressing part 420 located at the top of the vibration unit 300, and an upper sheet pressing part located at a predetermined distance upward from the lower sheet pressing part 420 ( 410), the left end of the lower sheet pressing part 420 and the upper sheet pressing part 410 are fixed, and the lower end is fixed to the base part 200, the first fixing part 430 and the lower sheet pressing part 420 And it may include a second fixing part 440 in which the right end of the upper sheet pressing part 410 is fixed and the lower end is fixed to the base part 200. In other words, the sheet guide unit 400 serves to guide the sheet 20 inserted into the inlet 110 as it moves between the press shaft 600 and the hitting drum 500. At this time, the lower sheet pressing part 420 is fixed to the first fixing part 430 and the second fixing part 440 so that the left and right ends do not move, and the upper sheet pressing part 410 is fixed to the first fixing part 430. And the rear portions of both sides may be hinged to the second fixing portion 440.

The upper sheet pressing portion 410 includes a rotation prevention portion 412 formed at an end where the striking wheel 510 is located and bent downward at a predetermined angle to prevent the striking wheel 510 from arbitrarily rotating, The rotation prevention portion 412 is in a state in which the end of the upper sheet pressing portion 410 is moved a predetermined distance upward as the sheet 20 is inserted into the sheet guide portion 400, allowing the striking wheel 510 to rotate. It can be In addition, the upper sheet pressing portion 410 may further include a bent pressing portion 411 whose end is moved upward by the sheet 20 that is partially bent downward and introduced.

In other words, as the sheet 20 is input through the inlet 110, the rotation prevention portion 412 moves upward while passing through the bending press portion 411, and the rotation lock state of the striking wheel 510 is released. And, as the guide roller 520 and the press wheel 610 rotate, the sheet 20 can be moved at a constant speed. At this time, the striking protrusion 511 of the striking wheel 510 is inserted into the hole randomly formed in the seat 20, and as the striking wheel 510 rotates, a sound may be generated as the vibrating pin 310 is struck. .

The sheet guide unit 400 may further include a pressing unit 450 that presses the upper sheet pressing unit 410 in a downward direction. Accordingly, the rotation prevention part 412 presses the upper sheet pressing part 410 through the pressing part 450 so that it does not move upward when the sheet 20 is not inserted, thereby preventing it from being struck by external vibration. The wheel 510 can be prevented from rotating.

Hereinafter, with reference 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 each be located at positions corresponding to the peripheral corners of the base part 200.

In other words, the base fixing portions 910 and 920 are formed in a shape that covers both a portion of the vertex side and a portion of the upper surface of the base portion 200, and the portion covering a portion of the upper surface is spaced a predetermined distance from the upper surface of the base portion 200. It can be formed in a position with a gap.

In addition, when the base portion 200 is disposed on the bottom surface inside the housing and the inlet 110 and outlet 120 are disposed on opposite sides of the housing 100, the base fixing portions 910 and 920 are positioned at the inlet 110 and outlet 120. 110 and the outlet 120 may extend from the inner surface of the housing 100 in which it is formed.

Additionally, the base fixing portions 910 and 920 may be formed in an ‘L’ shape, but are not limited to this.

Additionally, 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 unit 200 on which the sound generator and the motor 710 are fixed at the top is fixed to the housing 100, the lower surfaces of the base fixing units 910 and 920 and the base The upper surface of the unit 200 is 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, and preferably 0.5 mm. If the clearance between the base fixing parts 910, 920 and the base part 200 is wide, the fixing force by the base fixing parts 910, 920 is reduced, and if it is too close, the vibration of the motor 710 causes the housing 100 can be passed on.

Accordingly, the music box device 10 can minimize the transmission of vibration caused by the rotation of the motor 710 to the housing 100, which has the 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) located between the base fixing parts 910 and 920 and the base part 200. For example, the vibration transmission prevention member may be made of a material that can minimize vibration transmission, such as a sponge. By positioning the vibration transmission prevention member between the base fixing parts 910 and 920 and the base part 200, it is possible to minimize transmission of vibration and improve fixing force.

Referring to FIG. 2, the housing 100 has a predetermined space formed inside, a main body 101 with an outlet 120 through which sheets are discharged, and an inlet 110 into which the sheets are input. It may include a cover portion 102 coupled to (101). As an example, the main 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 include a first base fixing part 910 extending from the inner surface of the main body 101 where the outlet 120 is formed, and a second extending from the inner surface of the cover part 102. It may include a base fixing part 920.

In other words, when assembling the music box device 10, the base unit 200, on which the sound generating unit and the motor 710 are fixed at the top, is inserted into the main body unit 101, so that the base unit 200 is the first base unit. 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 peripheral corners of the base part 200. , which makes assembly easy.

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

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

10: Music box device 20: Sheet
100: housing
101: main body 102: cover part
110: Inlet 120: Outlet
200: base part
300: Vibration unit 310: Vibration pin
400: Sheet guide part
410: upper sheet pressing part 411: bending pressing part
412: Rotation prevention unit
420: Lower sheet pressing part
430: first fixing part 440: second fixing part
450: Pressure part
500: striking drum 510: striking wheel
511: striking protrusion 520: guide roller
530: Drum axis
600: press axis 610: press wheel
700: driving part
710: Motor 720: Motor fixing part
721: depression
730: Drive shaft
740: Motor gear unit
800: driving gear unit 810: first driving 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 an inlet through which the sheet is input and an outlet through which the sheet is discharged;
A plate-shaped base portion located inside the housing;
A sound generator located at the top of the base unit and generating a sound determined by the sheet inserted through the inlet;
a motor located at the top of the base unit and transmitting driving force to the sound generator; and
Including a base fixing part for fixing the base part,
The base fixing parts are each located at positions corresponding to the corners of the circumference of the base part, and are formed in a shape that covers both a part of the side surface and a part of the top surface of the vertex of the base part, so that a gap is formed between the base fixing part and the base part. And
A music box device wherein the part covering part of the upper surface is formed at a position having a predetermined gap with the upper surface of the base part.
delete delete According to paragraph 1,
When the base portion is disposed on the bottom surface inside the housing, and the inlet and the outlet are disposed on opposite sides of the housing,
The base fixing part is a music box device that extends from the inner surface of the housing where the inlet and the outlet are formed.
According to paragraph 1,
The base fixing part is formed in an 'ㄱ' shape, a music box device.
According to paragraph 1,
A music box device wherein the clearance between the base fixing part and the base part is 0.3mm to 0.7mm.
According to paragraph 1,
A music box device further comprising a vibration transmission prevention member located between the base fixing part and the base part.
According to paragraph 1,
The housing is
a main body portion having a predetermined space therein and an outlet through which sheets are discharged; and
An inlet through which the sheet is inserted is formed, and a cover part coupled to the main body part is formed,
The base fixing part includes a first base fixing part extending from the inner surface of the main body where the outlet is formed, and a second base fixing part extending from the inner surface of the cover part.
According to paragraph 1,
The sound generator
a vibrating part disposed on an upper part of the base part and having a plurality of vibrating pins arranged;
A drum shaft, a plurality of striking protrusions for striking the vibrating pin are formed along the circumference, a plurality of striking wheels arranged at regular intervals along the longitudinal direction of the drum shaft, and disposed between the striking wheels, the drum shaft A striking drum having a guide roller fixed thereto;
a press shaft located on an upper part of the percussion drum and having a press wheel spaced apart at a predetermined interval;
a driving gear unit that transmits the driving force of the motor to the hitting drum and the press shaft; and
A music box device comprising a control unit that controls the motor.
According to paragraph 1,
A music box device further comprising a battery unit that supplies power voltage to the motor.
According to paragraph 1,
A music box device located on the outer peripheral surface of the housing and further comprising a control unit including a power button, a playback button, and a speed control button.

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