Apparatus for realizing different rotation speeds using a single motor

Abstract

A device for implementing different rotational speeds using a single motor is disclosed. The device for implementing different rotational speeds using a single motor according to the present invention comprises: a single drive motor; a high-speed rotation unit that receives the rotational force of the drive motor and rotates at a high speed; a high-speed rotation disk that receives the rotational force of the drive motor and rotates at a high speed and is equipped with a plurality of magnets; and a low-speed rotation unit that is disposed adjacent to one side of the high-speed rotation disk, rotates independently separated from the high-speed rotation unit, and rotates at a low speed under the influence of magnetic flux generated from a plurality of magnets of the high-speed rotation disk in a rotating state. According to the present invention, a high-speed rotation unit that rotates at a relatively high speed and a low-speed rotation unit that rotates at a relatively low speed can be operated simultaneously using a single motor, and since a mechanical power transmission structure is not installed directly between the high-speed rotation unit and the low-speed rotation unit, it is possible to stimulate curiosity in visitors by showing high-speed and low-speed rotation operation states.

Description

Technology Field

[0001] The present invention relates to a device for implementing different rotational speeds using a single motor, wherein an upper rotating body can be rotated at a high speed and a lower rotating body can be rotated at a relatively low speed through a single motor drive. Background Technology

[0002] Generally, a zoetrope is an early animation device that generates animation effects by using a series of images seen through multiple slits formed in a rotating cylindrical drum. A zoetrope is equipped with multiple two-dimensional images inside the drum and rotates the drum to make the images pass through in succession, thereby generating a retinal afterimage effect that allows viewers to visually perceive the images as moving.

[0003] These zoetropes are devices invented about 100 years ago and are still widely used today for teaching scientific principles, but the level of interest they provide to visitors is gradually decreasing.

[0004] Accordingly, the applicant has developed a device that adds a separate low-speed rotating body in addition to a high-speed rotating zoetrope, and proposes a device that further stimulates the curiosity of visitors by ensuring that the high-speed rotating body maintains a constant rotational state even when visitors, out of curiosity, touch or rub the low-speed rotating body with their hands while viewing. Prior art literature

[0005] Republic of Korea Published Patent Application No. 10-2019-0076633 (Published July 2, 2019) The problem to be solved

[0006] The present invention has been devised to solve the aforementioned conventional problems and aims to provide a device for implementing different rotational speeds using a single motor, which enables the simultaneous operation of a high-speed rotating unit that rotates at a relatively high speed and a low-speed rotating unit that rotates at a relatively low speed using a single motor, and in particular, does not apply a power transmission structure that is directly mechanically connected between the high-speed rotating unit and the low-speed rotating unit. means of solving the problem

[0007] According to one aspect of the present invention, a device for implementing different rotational speeds using a single motor is provided, comprising: a driving motor; a high-speed rotation unit that receives the rotational force of the driving motor and rotates at a high speed; a high-speed rotation disk that receives the rotational force of the driving motor and rotates at a high speed and is equipped with a plurality of magnets; and a low-speed rotation unit that is disposed adjacent to the high-speed rotation disk and rotates independently of the high-speed rotation unit, and rotates at a low speed under the influence of magnetic flux generated from a plurality of magnets of the high-speed rotation disk in a rotating state.

[0008] The high-speed rotation unit comprises: a rotation shaft that is connected to the drive motor and power transmission means to rotate and is arranged vertically; and a plurality of rotation discs each having a plurality of display means for displaying a set image, which are coupled to rotate simultaneously with the rotation shaft along the vertical direction of the rotation shaft, and the high-speed rotation discs may be connected to the lower end of the rotation shaft so as to rotate simultaneously with the rotation shaft.

[0009] The above-mentioned rotating shaft may further include a fixed shaft that is formed in a hollow shape and is positioned to penetrate between the upper and lower ends of the rotating shaft and is positioned to penetrate the low-speed rotating unit in the vertical direction, the upper end of which is fixed to the uppermost end of a high-speed rotating unit support frame that rotates and supports the high-speed rotating unit, and the lower end of which is fixed to a low-speed rotating unit support frame that rotates and supports the low-speed rotating unit.

[0010] The low-speed rotation unit may include: an upper rotation disc positioned adjacent to the lower side of the high-speed rotation disc; a lower rotation disc arranged spaced apart in the lower direction of the upper rotation disc; and a plurality of connecting parts connecting the upper rotation disc and the lower rotation disc so that the lower rotation disc rotates simultaneously when the upper rotation disc rotates in accordance with the rotation of the high-speed rotation disc.

[0011] The low-speed rotation unit may include: an upper rotation disc positioned adjacent to the lower side of the high-speed rotation disc, having a first through hole formed in the center through which the fixed shaft passes, and being rotatably supported by the fixed shaft through a bearing; a lower rotation disc arranged spaced apart in the lower direction of the upper rotation disc, having a second through hole formed in the center through which the fixed shaft passes, and being rotatably supported by the fixed shaft through a bearing; and a plurality of connecting parts connecting the upper rotation disc and the lower rotation disc so that the lower rotation disc rotates simultaneously when the upper rotation disc rotates in accordance with the rotation of the high-speed rotation disc.

[0012] The above low-speed rotation unit may further include a screen having various patterns formed thereon, which is provided in a shape that wraps around the outer surface of the plurality of connections so that the plurality of connections are not exposed to the outside.

[0013] The above upper rotating disc may be made of a non-magnetic material.

[0014] The above high-speed rotating disk is a conductor in which a plurality of magnets are mounted spaced apart from each other along the circumferential and radial directions, and the low-speed rotating unit may include at least a conductor to rotate at a low speed under the influence of magnetic flux generated from the plurality of magnets.

[0015] The plurality of magnets mentioned above can be mounted on the bottom surface of the high-speed rotating disk facing the low-speed rotating unit.

[0016] The high-speed rotation unit support frame may include: a lower fixing plate disposed on the upper side of the high-speed rotation disk and having a lower fixing plate through hole formed therein for the fixed shaft to pass through and for the lower end of the rotation shaft to be inserted; a motor fixing plate disposed on the upper side of the lower fixing plate, having the driving motor fixed therein and through which the fixed shaft passes; an upper fixing plate disposed on the upper side of the motor fixing plate, having rotational support for the upper end of the rotation shaft and for supporting the upper end of the fixed shaft; and a plurality of support rods connecting and supporting the lower fixing plate and the motor fixing plate, and the lower fixing plate and the upper fixing plate.

[0017] A rotation detection disk is coupled to the rotation shaft to rotate simultaneously with the rotation shaft, and a rotation detection sensor may be provided on the motor fixing plate to detect the rotation of the rotation detection disk and control the operation of the drive motor. Effects of the invention

[0018] According to the device for implementing different rotational speeds using a single motor of the present invention described above, a high-speed rotational unit that rotates at a relatively high speed and a low-speed rotational unit that rotates at a relatively low speed can be operated simultaneously using a single motor, and since a mechanical power transmission structure is not directly installed between the high-speed rotational unit and the low-speed rotational unit, it is possible to stimulate curiosity in visitors by showing them the high-speed and low-speed rotational operation states.

[0019] Furthermore, since a direct mechanical power transmission structure is not installed between the high-speed rotating unit and the low-speed rotating unit, the high-speed rotating unit can maintain its rotational state even if a visitor manually stops the rotation of the low-speed rotating unit by holding it with their hand. Since this is unrelated to an increase in motor load, the motor will not be adversely affected even if visitors perform the aforementioned artificial rotation restriction action frequently and for extended periods.

[0020] In addition, the rotation of the low-speed rotation unit is restricted, but the moment the visitor releases their hand, the rotation resumes, which can extremely stimulate the visitor's curiosity. Brief explanation of the drawing

[0021] FIG. 1 is a perspective view showing a device for implementing different rotational speeds using a single motor according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a device for implementing different rotational speeds using a single motor according to an embodiment of the present invention, FIGS. 3 and FIGS. 4 are enlarged views of area II of FIGS. 2, FIG. 5 is a cross-sectional view showing the operating state of a device for implementing different rotational speeds using a single motor according to an embodiment of the present invention. FIG. 6 is a plan view showing a high-speed rotating disk of a device for implementing different rotational speeds using a single motor according to an embodiment of the present invention, FIG. 7 is a drawing showing the high-speed rotation unit rotating even when the low-speed rotation unit's rotation is prevented in a device for implementing different rotational speeds using a single motor according to an embodiment of the present invention. Specific details for implementing the invention

[0022] Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms; these embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. Identical reference numerals in the drawings refer to identical elements.

[0023] A device for implementing different rotational speeds using a single motor according to a preferred embodiment of the present invention can simultaneously operate a high-speed rotational unit that rotates at a relatively high speed and a low-speed rotational unit that rotates at a relatively low speed using a single motor, wherein, in particular, a power transmission structure that is directly mechanically connected between the high-speed rotational unit and the low-speed rotational unit is not applied.

[0024] In addition, the present invention allows the rotational state of the high-speed rotational unit to be maintained even if the user artificially stops the rotation by holding the low-speed rotational unit with their hand. Since the load on the single drive motor driving the high-speed rotational unit is not increased even if the user stops the rotation by touching the low-speed rotational unit out of curiosity, it can be applied regardless of the decrease in motor lifespan or durability.

[0025] The present invention will be described in detail below with reference to examples.

[0026] As illustrated in FIGS. 1 to 5, a different rotational speed implementation device (1000, hereinafter referred to as the 'rotational speed implementation device') using a single motor according to an embodiment of the present invention includes a driving motor (100), a high-speed rotation unit (200), a high-speed rotation disk (300), and a low-speed rotation unit (400).

[0027] The drive motor (100) is easy to control for forward and reverse rotation, and one is fixedly installed on the motor fixing plate (520) of the high-speed rotation unit support frame (500) described later.

[0028] As illustrated in FIGS. 1 to 5, the high-speed rotation unit (200) is directly connected to a driving motor (100) through a power transmission means (110) and receives the rotational force of the driving motor (100) to rotate at high speed.

[0029] In an embodiment of the present invention, the high-speed rotating unit (200) includes a rotating shaft (210) and a plurality of rotating discs (220).

[0030] The rotation shaft (210) is connected to the drive motor (100) and the power transmission means (110) to rotate and is arranged in an elongated vertical direction. Here, the power transmission means (110) may include, for example, a first pulley connected to the drive shaft of the drive motor (100), a second pulley coupled to the rotation shaft (210) to transmit the rotational force of the drive motor to the rotation shaft (210) to rotate the rotation shaft, and a belt (such as a timing belt) connecting the first pulley and the second pulley. However, it is not limited thereto, and the power transmission means (110) may be applied in various ways other than a pulley-belt, such as a sprocket wheel-chain or a gear module.

[0031] In an embodiment of the present invention, the rotating shaft (210) is formed in a hollow shape, and a fixed shaft (700), described later, is disposed on the inner side of the rotating shaft (210) so as to penetrate the rotating shaft (210) in the longitudinal direction.

[0032] As illustrated in FIGS. 1 to 5, the fixed shaft (700) is provided to support the rotation of the low-speed rotation unit (400) together with the high-speed rotation unit (200), and is positioned to penetrate between the upper and lower ends of the rotation shaft (210) and also to penetrate the low-speed rotation unit (400) in the vertical direction.

[0033] Additionally, the upper end of the fixed shaft (700) is fixed to the uppermost side of the high-speed rotation unit support frame (500) that rotates and supports the high-speed rotation unit (200), and the lower end of the fixed shaft (700) is fixed to the low-speed rotation unit support frame (600) that rotates and supports the low-speed rotation unit (400).

[0034] In an embodiment of the present invention, as illustrated in FIGS. 1 to 5, the high-speed rotating unit support frame (500) includes a lower fixed plate (510), a motor fixed plate (520), an upper fixed plate (530), and a plurality of support rods (550).

[0035] The lower fixed plate (510) is positioned on the upper side of the high-speed rotating disk (300) described later, and is positioned so as to have a gap of less than a certain distance from the high-speed rotating disk (300).

[0036] The lower fixed plate (510) is formed in a roughly circular or square plate structure, and a lower fixed plate through hole (511) is provided in the center so that the lower end of the rotation axis (210) is inserted and the fixed shaft (700) completely penetrates in the thickness direction.

[0037] As shown in FIG. 4, a first bracket (512) is mounted in the lower fixing plate through hole (511) portion of the lower fixing plate (510) so as to be integrally coupled with the rotation shaft (210) and rotate simultaneously. Here, the inner diameter of the lower fixing plate through hole (511) is formed to be larger than the outer diameter of the first bracket (512) to a certain extent, so that when the rotation shaft (210) rotates, the lower fixing plate (510) does not rotate while stably supporting the rotation of the rotation shaft (210). A high-speed rotating disk (300), which will be described later, is coupled to the first bracket (512) so as to rotate simultaneously with the rotation shaft (210).

[0038] Next, the motor fixing plate (520) is spaced apart from the upper side of the lower fixing plate (510), the driving motor (100) is fixed, and the fixing shaft (700) penetrates in the thickness direction.

[0039] In the central part of the motor fixing plate (520), a motor fixing plate through hole (521) is provided so that the fixed shaft (700) and the rotating shaft (210) can completely penetrate in the thickness direction.

[0040] As illustrated in FIG. 4, a separate second bracket (522) is mounted in the motor fixing plate through hole (521) portion of the motor fixing plate (520) to support rotation of the rotation shaft (210), and this second bracket (522) supports rotation of the rotation shaft (210) by interposing a bearing. Here, the inner diameter of the motor fixing plate through hole (521) is formed to be larger than the outer diameter of the rotation shaft (210) by a certain amount, and accordingly, when the rotation shaft (210) rotates, the motor fixing plate (520) does not rotate while stably supporting the rotation of the rotation shaft (210).

[0041] Next, the upper fixed plate (530) is positioned on the upper side of the motor fixed plate (520) and rotates to support the upper end of the rotating shaft (210), and also fixes to support the upper end of the fixed shaft (700).

[0042] As shown in FIG. 2, a separate third bracket (531) is mounted on the upper fixed plate (530) to support rotation of the rotation axis (210), and this third bracket (531) supports rotation of the rotation axis (210) through a bearing. In addition, the upper end of the fixed axis (700) is provided in a state of contact support with the lower surface of the upper fixed plate (530) so as to support the upper fixed plate (530) from below.

[0043] Next, a plurality of support rods (550) are provided to support each other by connecting the lower fixing plate (510) and the motor fixing plate (520), and the lower fixing plate (510) and the upper fixing plate (530), and can be joined, for example, through screws.

[0044] In an embodiment of the present invention, as shown in FIGS. 1 to 5, a transparent case (560) having a circular cross-section and made of a material such as acrylic or glass may be installed to connect the motor fixing plate (520) and the upper fixing plate (530).

[0045] Here, when the high-speed rotation unit (200) rotates, the high-speed rotation unit support frame (500) is configured not to rotate simultaneously, and accordingly, when the high-speed rotation unit (200) rotates at high speed, people in the vicinity can visually check the rotation state of the high-speed rotation unit (200) while being provided with safety through the transparent case (560).

[0046] In an embodiment of the present invention, as shown in FIG. 4, a rotation sensing disk (580) is connected to the rotation axis (210) so as to rotate simultaneously with the rotation axis (210), and specifically, the rotation sensing disk (580) is coupled to the rotation axis (210) through a disk coupler (581) and a screw, etc.

[0047] Additionally, the motor fixing plate (520) is provided with a rotation detection sensor (582) to detect the rotation of a rotation detection disk (580) and to control the operation of the drive motor (100), and the rotation speed of the drive motor (100) can be easily controlled using the detection value of the rotation detection sensor (582). The rotation detection sensor (582) can be applied as, for example, a transmissive photosensor (photodiode, phototransistor, etc.) having a light-emitting / light-receiving part.

[0048] In an embodiment of the present invention, as shown in FIGS. 1 and 2, a plurality of rotating discs (220) are coupled to the rotating axis (210) through a coupler and a screw, etc., so as to be rotatable along the vertical direction of the rotating axis (210) at the same time as the rotating axis (210), and each is provided with a plurality of display means (221) that display a set image.

[0049] Here, the display means (221) is installed so that when the rotating disc (220) rotates at high speed according to the high-speed rotation of the rotation axis (210), the spectator, etc. can visually confirm the continuous change of the set image through the transparent case (560), for example, the spectator can continuously view the phase change of the moon, such as the crescent moon, half moon, full moon, and new moon. The implementation of the image of the display means (221) is related to a zoetrope, and as shown in FIG. 2, a lighting means (532), such as an LED, is installed on the bottom surface of the upper fixed plate (530) to periodically emit a blinking light toward the display means (221), and since such technology is obvious to those skilled in the art, further specific explanation is omitted.

[0050] Next, as illustrated in FIGS. 1 to 6, the high-speed rotating disk (300) receives rotational force from the drive motor (100) and rotates at high speed, and is equipped with a plurality of magnets (310).

[0051] Here, the high-speed rotating disk (300) is positioned between the high-speed rotating unit (200) and the low-speed rotating unit (400), and is connected to the bottom of the rotating shaft (210) so that rotation occurs simultaneously with the rotating shaft (210).

[0052] Specifically, the high-speed rotating disk (300) is connected to the rotating shaft (210) so as to be rotatable simultaneously with the rotating shaft (210) through a first bracket (512) that is provided in the lower fixed plate through hole (511) of the lower fixed plate (510) and coupled with the rotating shaft (210).

[0053] Accordingly, in the present invention, when the drive motor (100) is driven, the rotation shaft (210), a plurality of rotation discs (220), and the high-speed rotation disk (300) are rotated at the same rotational speed.

[0054] The high-speed rotating disk (300) is a conductor capable of conducting current, such as aluminum, and as shown in FIG. 6, a plurality of magnets (310) are mounted spaced apart from each other along the circumferential and radial directions.

[0055] Specifically, a plurality of magnets (310) are mounted on the bottom surface of a high-speed rotating disk (300) facing a low-speed rotating unit (400), specifically the upper rotating disc (410) of the low-speed rotating unit (400).

[0056] As will be explained again below, when the high-speed rotating disk (300) rotates at high speed, the upper rotating disc (410) of the low-speed rotating unit (400) rotates primarily, and the lower rotating disc (420) connected to the upper rotating disc (410) and a plurality of connecting parts (430) rotate simultaneously.

[0057] The present invention is not structured to transmit rotational force by mechanically connecting the high-speed rotating disk (300) and the low-speed rotating unit (400) directly to each other, but rather to allow the upper rotating disc (410) to rotate under the influence of the magnetic flux of the magnet (310) generated during the high-speed rotation of the high-speed rotating disk (300).

[0058] In an embodiment of the present invention, the low-speed rotation unit (400) includes at least a conductor to rotate at a low speed under the influence of magnetic flux generated from a plurality of magnets (310). Specifically, the upper rotation disc (410) of the low-speed rotation unit (400) is made of a conductor such as aluminum or copper capable of conducting current. Additionally, the upper rotation disc (410) is made of a non-magnetic material such as aluminum or copper so as not to be magnetized within the magnetic field generated around the plurality of magnets (310). If the upper rotation disc (410) is made of a magnetic material, it will be attached to the high-speed rotation disc by the magnets (310), resulting in a situation where rotation is impossible.

[0059] The rotation relationship of the upper rotating disc (410) according to the rotation of the high-speed rotating disk (300) is a part to which the principle of a type of Arago disc is applied. Under the influence of the magnetic flux resulting from the rotation of multiple magnets (310), eddy currents are generated in the upper rotating disc (410), which is a conductor, and rotational force is generated in the upper rotating disc (410) according to Fleming's left-hand rule. To elaborate, when current flows through the upper rotating disc (410) due to the rotation of multiple magnets (310), the magnetic field produced by the magnets (310) and the magnetic field produced by the current flowing through the upper rotating disc (410) interact, and the rotation of the upper rotating disc (410) is achieved by electromagnetic force.

[0060] Here, the rotational speed of the upper rotating disc (410) is at a low speed state that is at least a certain lower than the rotational speed of the high-speed rotating disc (300).

[0061] Next, as illustrated in FIGS. 1 to 7, the low-speed rotation unit (400) is positioned adjacent to the high-speed rotation disk (300) on one side and rotates independently from the high-speed rotation unit (200), and rotates at a low speed under the influence of the magnetic flux generated from the multiple magnets (310) of the high-speed rotation disk (300) in a rotating state.

[0062] Here, the meaning of the aforementioned 'separated and independently rotated' means that a direct power transmission structure for transmitting the rotational force of the drive motor (100) between the high-speed rotation unit (200) and the low-speed rotation unit (400) is not mechanically connected, and in addition, in a state where the high-speed rotation of the high-speed rotation disk (300) and the relative low-speed rotation of the low-speed rotation unit (400) are being rotated according to the rotation of the high-speed rotation unit (200), it means that even if a spectator or others artificially restrict the rotation of the low-speed rotation unit (400) as shown in FIG. 7, that is, even if they restrict the rotation by holding the screen (440) or the multiple connecting parts (430) described later with their hands, the rotation of the high-speed rotation unit and the high-speed rotation disk is continuously maintained.

[0063] Specifically, as illustrated in FIGS. 1 to 5, the low-speed rotation unit (400) includes an upper rotation disc (410), a lower rotation disc (420), a plurality of connecting parts (430), and a screen (440).

[0064] The upper rotating disc (410) is positioned adjacent to the lower side of the high-speed rotating disc (300) and rotates by the electromagnetic force generated by the influence of the magnetic flux of a plurality of magnets (310) rotating as described above, and is made of a conductor capable of conducting current, such as aluminum or copper.

[0065] Additionally, the upper rotating disc (410) is made of a non-magnetic material such as aluminum or copper so as not to be magnetized within the magnetic field generated around the plurality of magnets (310). If the upper rotating disc (410) is made of a magnetic material, it will be attached to the high-speed rotating disc by the magnetic force of the magnets (310), resulting in a situation where rotation becomes impossible.

[0066] A first through hole is formed in the central part of the upper rotating disc (410) to allow the fixed shaft (700) to pass through, and the fixed shaft (700) is installed to be rotatably supported by a bearing. Specifically, a bearing is installed on the bottom surface of the upper rotating disc (410) so that an inner liner is in close contact with the outer surface of the fixed shaft (700), and a separate bracket is fixedly installed on the bottom surface of the upper rotating disc (410) to secure this bearing. Accordingly, when the high-speed rotating disk (300) rotates, the upper rotating disc (410) rotates at a low speed while being rotatably supported by the bearing.

[0067] Next, as illustrated in FIGS. 1 to 5, the lower rotating disc (420) is spaced apart from the upper rotating disc (410) in the lower direction, and a plurality of connecting parts (430) are formed in the shape of a bar or rod to connect the upper rotating disc (410) and the lower rotating disc (420) so that when the upper rotating disc (410) rotates at a low speed due to the rotation of the high-speed rotating disc (300), the lower rotating disc (420) rotates at a low speed simultaneously.

[0068] In an embodiment of the present invention, the lower rotating disc (420) does not need to be made of a conductor and may be made of a material such as plastic to reduce the weight of the entire device, in which case a beneficial effect occurs in terms of transport and storage due to the weight reduction.

[0069] Additionally, in order for the rotational force of the upper rotating disc (410) to be smoothly transmitted to the lower rotating disc (420) through a plurality of connecting parts (430) so that the lower rotating disc rotates, it is preferable that the weight of the lower rotating disc (420) be equal to or lighter than the weight of the upper rotating disc (410).

[0070] As illustrated in FIGS. 1 to 5, a second through hole is formed in the central part of the lower rotating disc (420) so that a fixed shaft (700) passes through, and the fixed shaft (700) is installed to be rotatably supported through a bearing. Specifically, a bearing is installed on the upper surface of the lower rotating disc (420) so that an inner liner is in close contact with the outer surface of the fixed shaft (700), and a separate bracket is fixedly installed on the upper surface of the lower rotating disc (420) to fix this bearing. Accordingly, when the high-speed rotating disc (300) rotates, the upper rotating disc (410) and the lower rotating disc (420) rotate at a low speed while being rotatably supported by the bearings.

[0071] Next, the screen (440) is provided in a form that wraps around the outer surface of the plurality of connecting parts (430) so that the plurality of connecting parts (430) are not exposed to the outside, and a pattern of various shapes (not shown) is formed. Here, the pattern (not shown) is a transparent or translucent area or a perforated part, and light emitted from a lighting part (710), such as an LED installed on the outer surface of the fixed shaft (700), can pass through the pattern-forming part and be emitted to the outside.

[0072] Although the present invention has been illustrated and described above in relation to preferred embodiments for illustrating the principles of the invention, the invention is not limited to the configuration and operation as illustrated and described. Rather, those skilled in the art will understand that numerous changes and modifications to the invention are possible without departing from the spirit and scope of the appended claims. Explanation of the symbols

[0073] 1000: Rotational speed implementation device 100: Drive motor 200: High-speed rotary unit 210: Rotating shaft 220: Rotating disc 221: Display means 300: High-speed rotating disk 310: Magnet 400: Low-speed rotation unit 410: Upper rotation disc 420: Lower rotating disc 430: Connecting part 440: Screen 500: High-speed rotating unit support frame 510: Lower fixing plate 520: Motor fixing plate 530: Upper fixed plate 560: Transparent case 580: Rotation-sensing disk 582: Rotation-sensing sensor 600: Low-speed rotation unit support frame 700: Fixed shaft 710: Lighting unit

Claims

Claim 1 A device for implementing different rotational speeds using a single motor, comprising: a driving motor; a high-speed rotation unit that receives the rotational force of the driving motor and rotates at high speed; a high-speed rotation disk that receives the rotational force of the driving motor and rotates at high speed and is equipped with a plurality of magnets; and a low-speed rotation unit that is disposed adjacent to one side of the high-speed rotation disk, rotates independently separated from the high-speed rotation unit, and rotates at low speed under the influence of magnetic flux generated from a plurality of magnets of the high-speed rotation disk in a rotating state, wherein the high-speed rotation disk is a conductor and the plurality of magnets are mounted spaced apart from each other along the circumferential and radial directions, and the low-speed rotation unit includes at least a conductor to rotate at low speed under the influence of magnetic flux generated from the plurality of magnets. Claim 2 A device for implementing different rotational speeds using a single motor, wherein the high-speed rotational unit comprises: a rotational shaft that is connected to the drive motor and a power transmission means to rotate and is arranged vertically; and a plurality of rotational discs each having a plurality of display means for displaying a set image, which are coupled to rotate simultaneously with the rotational shaft along the vertical direction of the rotational shaft, and the high-speed rotational disc is connected to the lower end of the rotational shaft so as to rotate simultaneously with the rotational shaft. Claim 3 A device for implementing different rotational speeds using a single motor, characterized in that, in paragraph 2, the rotational shaft is formed in a hollow shape and further comprises a fixed shaft that is positioned to penetrate between the upper and lower ends of the rotational shaft and also to penetrate the low-speed rotational unit in the vertical direction, wherein the upper end is fixed to the uppermost side of a high-speed rotational unit support frame that rotates and supports the high-speed rotational unit and the lower end is fixed to a low-speed rotational unit support frame that rotates and supports the low-speed rotational unit. Claim 4 In paragraph 2, the low-speed rotation unit comprises: an upper rotation disc positioned adjacent to the lower side of the high-speed rotation disc; a lower rotation disc arranged spaced apart in the lower direction of the upper rotation disc; and a plurality of connecting parts connecting the upper rotation disc and the lower rotation disc so that the lower rotation disc rotates simultaneously when the upper rotation disc rotates in accordance with the rotation of the high-speed rotation disc, thereby forming a device for implementing different rotational speeds using a single motor. Claim 5 In paragraph 3, the low-speed rotation unit comprises: an upper rotation disc that is arranged adjacent to the lower side of the high-speed rotation disc and has a first through hole formed in the center through which the fixed shaft passes, and is rotatably supported by the fixed shaft through a bearing; a lower rotation disc that is spaced apart in the lower direction of the upper rotation disc and has a second through hole formed in the center through which the fixed shaft passes, and is rotatably supported by the fixed shaft through a bearing; and a plurality of connecting parts that connect the upper rotation disc and the lower rotation disc so that the lower rotation disc rotates simultaneously when the upper rotation disc rotates in accordance with the rotation of the high-speed rotation disc. Claim 6 A device for implementing different rotational speeds using a single motor, characterized in that, in claim 4 or 5, the low-speed rotation unit further includes a screen having a pattern of various shapes formed thereon, which is provided in a form that surrounds the outer surface of the plurality of connections so that the plurality of connections are not exposed to the outside. Claim 7 A device for implementing different rotational speeds using a single motor, characterized in that, in claim 4 or 5, the upper rotating disc is made of a non-magnetic material. Claim 8 In paragraph 3, the high-speed rotation unit support frame comprises: a lower fixing plate disposed on the upper side of the high-speed rotation disk and having a lower fixing plate through hole formed therein for the fixed shaft to pass through and for the lower end of the rotation shaft to be inserted; a motor fixing plate disposed on the upper side of the lower fixing plate, having the driving motor fixed therein and through which the fixed shaft passes; an upper fixing plate disposed on the upper side of the motor fixing plate, having rotational support for the upper end of the rotation shaft and for supporting the upper end of the fixed shaft; and a plurality of support rods connecting and supporting between the lower fixing plate and the motor fixing plate, and between the lower fixing plate and the upper fixing plate. A device for implementing different rotational speeds using a single motor. Claim 9 A device for implementing different rotational speeds using a single motor, characterized in that, in claim 8, a rotation sensing disk is coupled to the rotation shaft to rotate simultaneously with the rotation shaft, and a rotation sensing sensor is provided on the motor fixing plate to detect the rotation of the rotation sensing disk and control the driving of the driving motor.

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