WO2019172555A1

WO2019172555A1 - Gear noise reduction device and electronic device including same

Info

Publication number: WO2019172555A1
Application number: PCT/KR2019/001967
Authority: WO
Inventors: 심재규; 박성진
Original assignee: 삼성전자 주식회사
Priority date: 2018-03-07
Filing date: 2019-02-19
Publication date: 2019-09-12
Also published as: KR20190105931A

Abstract

Introduced is an electronic device, comprising: a motor for receiving electric power and providing driving force; at least one gear which receives the driving force from the motor and rotates about a rotation shaft; a housing which houses the gear and in which the rotation shaft is located; a noise reduction member which is disposed in a contact area where a part of the gear and a part of the housing are in contact with each other while the gear is being driven and which has magnetism; and a magnetic body which is disposed in at least a portion of an area between the gear and the housing. Various other embodiments are possible.

Description

Gear noise reduction device and electronic device including the same

Embodiment of the present invention relates to a device for reducing the noise generated in the process of driving the gear by a power source such as a motor.

Many of the products using motors are used with gearboxes that can adjust the rotational speed and drive torque at the output stage relative to the rotational speed and drive torque of the motor. It is possible to increase the drive torque while decreasing the rotational speed, or increase the rotational speed while reducing the drive torque.

In the case of using the gearbox, the gears in the gearbox collide with the housing of the gearbox during the driving of the motor, and noise may occur.

According to various embodiments of the present disclosure, a lubricating and / or buffering material may be disposed between the gear inside the gearbox and the gearbox housing to reduce noise generated during the driving of the gearbox.

In addition, it is possible to prevent the noise reduction member that acts as a lubrication and / or buffering from being lost during the drive of the gearbox.

An electronic device according to an embodiment of the present invention is a motor that is supplied with electric power to provide a driving force, the driving force is received from the motor, rotates about a rotating shaft, at least one gear disposed, the built-in gear and the rotating shaft The noise reduction member having magnetic properties and a magnetic body disposed in at least a partial region between the gear and the housing are disposed in a housing in which the position is located, a contact region in which a part of the gear and a portion of the housing come into contact with each other while driving the gear. It may include.

Gear noise reduction device according to an embodiment of the present invention is operated by receiving a driving force from the motor, the gear rotates around a rotation axis located in the housing, a portion of the gear and a portion of the housing during the drive of the gear contact And a noise reducing member having magnetic properties and a magnetic body disposed in at least a partial region between the gear and the housing.

According to the gear noise reduction apparatus according to various embodiments of the present invention as described above, it is possible to minimize the occurrence of noise by performing a buffering action while lubricating without disturbing the driving of the gear. In addition, it is possible to prevent the member for buffering and lubrication from being lost during the driving of the memory.

1 is a block diagram of an electronic device in a network environment including a gear noise reduction device according to various embodiments.

2A to 2D are views of an electronic device including a gearbox or a driving noise reduction device according to an embodiment of the present invention.

Figure 3 is a perspective view of a gearbox including a gear noise reduction device according to an embodiment of the present invention.

4 to 6 are cross-sectional views of a gear noise reduction apparatus according to various embodiments of the present disclosure.

7A to 8B are diagrams illustrating magnetic materials of a gear noise reduction apparatus according to various embodiments of the present disclosure.

1 is a block diagram of an electronic device 101 in a network environment 100, according to various embodiments. Referring to FIG. 1, in the network environment 100, the electronic device 101 communicates with the electronic device 102 through a first network 198 (eg, a short-range wireless communication network) or the second network 199. The electronic device 104 may communicate with the server 108 through a long range wireless communication network. According to an embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108. According to an embodiment, the electronic device 101 may include a processor 120, a memory 130, an input device 150, an audio output device 155, a display device 160, an audio module 170, and a sensor module ( 176, interface 177, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196, or antenna module 197. ) May be included. In some embodiments, at least one of the components (for example, the display device 160 or the camera module 180) may be omitted or one or more other components may be added to the electronic device 101. In some embodiments, some of these components may be implemented in one integrated circuit. For example, the sensor module 176 (eg, fingerprint sensor, iris sensor, or illuminance sensor) may be implemented embedded in the display device 160 (eg, display).

The processor 120, for example, executes software (eg, the program 140) to execute at least one other component (eg, hardware or software component) of the electronic device 101 connected to the processor 120. It can control and perform various data processing or operations. According to one embodiment, as at least part of data processing or operation, processor 120 may send instructions or data received from another component (eg, sensor module 176 or communication module 190) to volatile memory 132. Can be loaded into, processed in a command or data stored in volatile memory 132, and stored in the non-volatile memory (134). According to an embodiment, the processor 120 may include a main processor 121 (eg, a central processing unit or an application processor), and a coprocessor 123 (eg, a graphics processing unit, an image signal processor) that may operate independently or together. , Sensor hub processor, or communication processor). Additionally or alternatively, the coprocessor 123 may be set to use lower power than the main processor 121 or to be specialized for its designated function. The coprocessor 123 may be implemented separately from or as part of the main processor 121.

The coprocessor 123 may, for example, replace the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or the main processor 121 may be active (eg, execute an application). At least one of the components of the electronic device 101 (eg, the display device 160, the sensor module 176, or the communication module 190) together with the main processor 121 while in the) state. Control at least some of the functions or states associated with the. According to one embodiment, the coprocessor 123 (eg, an image signal processor or communication processor) may be implemented as part of other functionally related components (eg, camera module 180 or communication module 190). have.

The memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 176) of the electronic device 101. The data may include, for example, software (eg, the program 140) and input data or output data for a command related thereto. The memory 130 may include a volatile memory 132 or a nonvolatile memory 134.

The program 140 may be stored as software in the memory 130, and may include, for example, an operating system 142, middleware 144, or an application 146.

The input device 150 may receive a command or data to be used for a component (for example, the processor 120) of the electronic device 101 from the outside (for example, a user) of the electronic device 101. The input device 150 may include, for example, a microphone, a mouse, or a keyboard.

The sound output device 155 may output a sound signal to the outside of the electronic device 101. The sound output device 155 may include, for example, a speaker or a receiver. The speaker may be used for general purposes such as multimedia playback or recording playback, and the receiver may be used to receive an incoming call. According to one embodiment, the receiver may be implemented separately from or as part of a speaker.

The display device 160 may visually provide information to the outside (eg, a user) of the electronic device 101. The display device 160 may include, for example, a display, a hologram device, or a projector and a control circuit for controlling the device. According to an embodiment, the display device 160 may include a touch circuitry configured to sense a touch, or a sensor circuit (eg, a pressure sensor) configured to measure the strength of a force generated by the touch. have.

The audio module 170 may convert sound into an electric signal or, conversely, convert an electric signal into a sound. According to an embodiment, the audio module 170 acquires sound through the input device 150, or an external electronic device (eg, connected to the sound output device 155 or the electronic device 101 directly or wirelessly). Sound may be output through the electronic device 102 (eg, a speaker or a headphone).

The sensor module 176 detects an operating state (eg, power or temperature) of the electronic device 101, or an external environmental state (eg, a user state), and generates an electrical signal or data value corresponding to the detected state. can do. According to an embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared sensor, a biometric sensor, It may include a temperature sensor, a humidity sensor, or an illuminance sensor.

The interface 177 may support one or more designated protocols that may be used for the electronic device 101 to be directly or wirelessly connected to an external electronic device (for example, the electronic device 102). According to an embodiment, the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 178 may include a connector through which the electronic device 101 may be physically connected to an external electronic device (eg, the electronic device 102). According to an embodiment, the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 179 may convert an electrical signal into a mechanical stimulus (eg, vibration or movement) or an electrical stimulus that can be perceived by the user through tactile or kinesthetic senses. According to one embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and videos. According to one embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 188 may manage power supplied to the electronic device 101. According to one embodiment, the power management module 388 may be implemented, for example, as at least part of a power management integrated circuit (PMIC).

The battery 189 may supply power to at least one component of the electronic device 101. According to one embodiment, the battery 189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell or a fuel cell.

The communication module 190 may establish a direct (eg wired) communication channel or wireless communication channel between the electronic device 101 and an external electronic device (eg, the electronic device 102, the electronic device 104, or the server 108). Establish and perform communication over established communication channels. The communication module 190 may operate independently of the processor 120 (eg, an application processor) and include one or more communication processors supporting direct (eg, wired) or wireless communication. According to one embodiment, the communication module 190 is a wireless communication module 192 (eg, a cellular communication module, a near field communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (eg It may include a local area network (LAN) communication module, or a power line communication module. The corresponding communication module of these communication modules may be a first network 198 (e.g. a short range communication network such as Bluetooth, WiFi direct or infrared data association (IrDA)) or a second network 199 (e.g. cellular network, the Internet, or Communicate with external electronic devices via a telecommunications network, such as a computer network (eg, LAN or WAN). These various types of communication modules may be integrated into one component (eg, a single chip) or may be implemented by a plurality of components (eg, a plurality of chips) separate from each other. The wireless communication module 192 uses subscriber information (e.g., international mobile subscriber identifier (IMSI)) stored in the subscriber identification module 196 in a communication network such as the first network 198 or the second network 199. The electronic device 101 may be checked and authenticated.

The antenna module 197 may transmit or receive a signal or power to an external (eg, an external electronic device) or from the outside. According to one embodiment, antenna module 197 may include one or more antennas, from which at least one antenna suitable for a communication scheme used in a communication network, such as first network 198 or second network 199, For example, it may be selected by the communication module 190. The signal or power may be transmitted or received between the communication module 190 and the external electronic device through the at least one selected antenna.

At least some of the components are connected to each other and connected to each other through a communication scheme between peripheral devices (eg, a bus, a general purpose input and output (GPIO), a serial peripheral interface (SPI), or a mobile industry processor interface (MIPI)). (Command or data) can be exchanged with each other.

According to an embodiment, the command or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199. Each of the electronic devices 102 and 104 may be a device of the same or different type as the electronic device 101. According to an embodiment of the present disclosure, all or part of operations executed in the electronic device 101 may be executed in one or more external devices among the external

electronic devices

102, 104, or 108. For example, when the electronic device 101 needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device 101 instead of executing the function or service itself. In addition to or in addition, one or more external electronic devices may be requested to perform at least a part of the function or the service. The one or more external electronic devices that receive the request may execute at least a part of the requested function or service, or an additional function or service related to the request, and transmit a result of the execution to the electronic device 101. The electronic device 101 may process the result as it is or additionally and provide it as at least part of a response to the request. To this end, for example, cloud computing, distributed computing, or client-server computing technology may be used.

Electronic devices according to various embodiments of the present disclosure may be various types of devices. The electronic device may include, for example, a portable communication device (eg, a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device. Electronic devices according to embodiments of the present disclosure are not limited to the above-described devices.

Various embodiments of the present document and terminology used herein are not intended to limit the technical features described in the present specification to specific embodiments, but should be understood to include various changes, equivalents, or substitutes for the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of the noun corresponding to the item may include one or more of the items, unless the context clearly indicates otherwise. In this document, "A or B", "At least one of A and B", "At least one of A or B," "A, B or C," "At least one of A, B and C," and "A And phrases such as "at least one of B, or C" may include all possible combinations of items listed together in the corresponding one of the phrases. Terms such as "first", "second", or "first" or "second" may be used merely to distinguish a component from other corresponding components, and to separate the components from other aspects (e.g. Order). Some (eg, first) component may be referred to as "coupled" or "connected" to another (eg, second) component, with or without the term "functionally" or "communicatively". When mentioned, it means that any component can be connected directly to the other component (eg, by wire), wirelessly, or via a third component.

As used herein, the term "module" may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. The module may be an integral part or a minimum unit or part of the component, which performs one or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

Various embodiments of this document may include one or more instructions stored on a storage medium (eg, internal memory 136 or external memory 138) that can be read by a machine (eg, electronic device 101). It may be implemented as software (eg, program 140) including the. For example, a processor (eg, the processor 120) of the device (eg, the electronic device 101) may call and execute at least one command among one or more instructions stored from the storage medium. This enables the device to be operated to perform at least one function in accordance with the at least one command invoked. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' means only that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), which is the case when data is stored semi-permanently on the storage medium. It does not distinguish cases where it is temporarily stored.

According to one embodiment, a method according to various embodiments disclosed herein may be provided included in a computer program product. The computer program product may be traded between the seller and the buyer as a product. The computer program product is distributed in the form of a device-readable storage medium (e.g. compact disc read only memory (CD-ROM)), or through an application store (e.g. Play StoreTM) or two user devices ( Example: smartphones) can be distributed (eg downloaded or uploaded) directly or online. In the case of on-line distribution, at least a portion of the computer program product may be stored at least temporarily on a device-readable storage medium such as a server of a manufacturer, a server of an application store, or a relay server, or may be temporarily created.

According to various embodiments, each component (eg, module or program) of the above-described components may include a singular or plural entity. According to various embodiments, one or more of the aforementioned components or operations may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg, a module or a program) may be integrated into one component. In this case, the integrated component may perform one or more functions of the component of each of the plurality of components the same as or similar to that performed by the corresponding component of the plurality of components before the integration. . According to various embodiments, operations performed by a module, program, or other component may be executed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order, or omitted. Or one or more other actions may be added.

2A to 2D are diagrams of an electronic device 400 including a gearbox 200 or a driving noise reduction apparatus 200a according to an embodiment of the present invention.

The electronic device 400 according to an embodiment of the present invention illustrated in FIG. 2A may be a compact electronic device 400 that can be used indoors. Unlike electronic devices used outdoors, electronic devices 400 used in quiet spaces such as indoors may be perceived as noise.

For example, the noise generated when the gear operated by the driving of the motor collides with the surrounding structure may not significantly affect the function itself of the electronic device 400, but it may damage the product value of the electronic device 400. You may. Therefore, the quietness of the operation of the small electronic device mainly used indoors may be very important.

FIG. 2B is an enlarged view of portion A of FIG. 2A and may illustrate a driving noise reduction apparatus 200a applied to an electronic device 400 (see FIG. 2A) according to an exemplary embodiment of the present invention. The electronic device 400 according to an embodiment of the present invention may operate along three axes (for example, X, Y, and Z) defining a three-dimensional space. For example, FIG. 2B is a portion indicated by A in FIG. 2A and may rotate the electronic device 400 based on the X axis.

FIG. 2C is an enlarged view of a portion B of FIG. 2A and illustrates a driving noise reduction apparatus 200a applied to an electronic device 400 (see FIG. 2A) according to an embodiment of the present invention. FIG. 2C is a portion indicated by B in FIG. 2A and may rotate the electronic device 400 based on the Y axis.

FIG. 2D is an enlarged view of portion C of FIG. 2A and illustrates a driving noise reduction apparatus 200a applied to an electronic device 400 (see FIG. 2A) according to an exemplary embodiment of the present invention. FIG. 2D is a portion indicated by C of FIG. 2A, and may rotate the electronic device 400 based on the Z axis.

3 is a perspective view of a gearbox 200 including a gear noise reduction apparatus 200a according to an embodiment of the present invention.

The gearbox 200 may include at least one gear 210 having various sizes, including a motor gear that transmits rotational force of the motor 310. The gear 210 embedded in the gearbox 200 may rotate by receiving a driving force from the motor 310, rotate about a rotation shaft 211, and transmit an output from the motor 310.

Gearbox 200 according to an embodiment of the present invention has been described as an example that the rotational force of the motor 310 is directly transmitted to the gear 210 through the motor gear, but is not limited thereto. For example, a pulley (not a motor gear) is connected to the motor 310, and may indirectly transmit power to the gear 210 through a belt.

Although the motor 310 may be directly connected to the output terminal, the output of the motor 310 itself, that is, the rotation speed and the driving torque may be directly used, but the output of the motor 310 may be transmitted to the at least one gear 210 through the motor gear. Can also be used.

The output of the motor 310 may adjust the rotational speed or the rotational torque at the output stage by adjusting the gear ratio in relation to one or more gears 210 engaged with (eg engaged with) the motor gear. As such, the gearbox 200 may include a device that is modularized by embedding it in the housing 300 including one or more gears 210 that convert the output of the motor 310 and transmit it to the output terminal.

4 to 6 are cross-sectional views of a gear noise reduction apparatus 200a according to various embodiments of the present disclosure.

In describing the gear noise reduction apparatus 200a according to various embodiments of the present disclosure, terms such as up, down, left, and right may be used to help the understanding of the present invention, but this is not an absolute criterion. When the direction of is changed, it can be changed together correspondingly.

4 is a cross-sectional view conceptually showing the interior of the gear noise reduction apparatus 200a according to an embodiment of the present invention.

Gear noise reduction device 200a according to an embodiment of the present invention may include a gear 210, a noise reduction member and a magnetic body (230).

The gearbox 200 may include a housing 300 containing at least one or more gears 210 mentioned above. The housing 300 of the gearbox 200 has a rotation shaft 211 at which at least one gear 210 rotates (for example, fixed), but has a predetermined distance from the gear 210 for smooth rotation of the gear 210. The rotating shaft 211 may be spaced apart (eg, fixed).

Referring to Figure 4, in the process of the output of the motor 310 is transmitted to the output terminal through the gear box 200, the meshed surface (for example, mating surface) of the gear and the gear 210, or gear 210 ) And another gear 210 in engagement with each other (eg, engagement surface) are exactly aligned with the direction of the output shaft 311 (for example, the up and down direction based on the illustrated state of FIG. 4) in which the motor 310 rotates. If it is (eg, if the engagement surface is upright based on the state shown in Figure 4), it can be rotated in a state spaced apart from the housing 300. However, when the interlocked surfaces (eg, engagement surfaces) between the gears 210 are upright and not aligned in parallel with the output shaft 311 of the motor 310, the interlocked surfaces (for example, the engagement surfaces) between the gears 210 are tilted. Tooth surface), as well as the force in the tangential direction with respect to the rotational direction of the rotation axis of the motor 310 may be generated upward or downward. Substantially the meshed surfaces (eg, tooth surfaces) of the motor gears and the gears 210 are difficult to align exactly with the direction of the output shaft 311 of the motor 310 due to tolerances in the machining of the gears. The gear 210 in the gearbox 200 may move up and down along the rotation shaft 211 by the mating surface. In this process, the gear 210 may collide with an upper inner surface or a lower inner surface of the housing 300 to generate noise.

In the present invention, the noise reduction member 220 may be disposed between the gear 210 and the inner surface of the housing 300 to prevent this.

However, simply filling the shock absorbing member between the gear 210 and the housing 300 as the noise reduction member 220 only for the prevention of noise generation may reduce the driving force due to the friction between the gear 210 and the housing 300. It may cause breakage due to wear of the gear 210 or the housing 300. Therefore, the noise reduction member 220 should not only serve as a buffer but also be able to perform a lubrication role to prevent friction with the housing 300 due to the rotation of the gear 210. In addition, the noise reduction member 220 should be able to be maintained without being lost between the gear 210 and the housing 300 during the rotation of the gear 210 for durability and reliability of the operation.

The noise reduction member 220 according to an embodiment of the present invention may use at least a portion of a magnetic liquid. In addition, the magnetic fluid may be disposed together with the magnetic body 230 to prevent the magnetic fluid from being lost between the gear 210 and the housing 300.

The magnetic fluid is a mixture of magnetic fine particles with a surfactant (eg, oil) together with a surfactant, and may be a fluid and magnetic material. The magnetic fluid may simultaneously function as a buffer and / or a lubrication between the gear 210 and the housing 300, which are formed based on a fluid such as oil. In addition, the magnetic fluid is attracted to the magnetic particles of the magnetic material 230 is mixed with the bar, it can be maintained without being lost in the rotation of the gear 210.

The gear 210 is rotated by receiving the driving force of the motor 310 directly or indirectly, and the portion in which the gear 210 and the housing 300 come into contact with each other has a ring shape except for a portion of the rotation shaft 211 of the gear 210. Can be formed. Therefore, as shown in FIG. 4, by forming the magnetic body 230 in a ring shape and arranging it on the gear 210 side so that the rotation shaft 211 of the gear 210 is located in the hollow, the magnetic fluid is ringed on the gear side. It may be arranged in a shape.

In addition, the magnetic body 230 is disposed on the gear 210 side to increase the weight of the gear 210, thereby lowering the frequency of vibration that may occur during the rotation of the gear 210 to collide with the housing 300. Can be lowered.

5 is a cross-sectional view conceptually illustrating the internal structure of the gear noise reduction apparatus 200a according to another embodiment of the present invention.

In describing the gear noise reduction apparatus 200a according to an exemplary embodiment of the present disclosure, the same reference numerals are used for the same components as in the embodiment of FIG. Explain.

Referring to FIG. 5, the magnetic body 230 may be disposed on the housing 300 side unlike the case of FIG. 4. By arranging the magnetic body 230 on the housing 300 side, it is possible to prevent the increase of the weight of the gear 210 to prevent the loss of the driving force.

6 is a cross-sectional view conceptually showing the inside of the gear noise reduction apparatus 200a according to another embodiment of the present invention.

6 is a combination of the embodiments of FIG. 4 and FIG. 5, the magnetic body 230 is disposed on the housing 300 side in one of the up and down directions of the gear 210 and the other direction. In the gear 210, the magnetic body 230 may be disposed.

Since the weight of the gear 210 increases compared to the embodiment of FIG. 4, the frequency of vibration generated during the rotation process can be lowered, and the weight of the gear is smaller than that of the embodiment of FIG. 5, thereby minimizing the loss of driving force. have.

7A to 8B are diagrams illustrating a magnetic body 230 of a gear noise reduction apparatus according to various embodiments of the present disclosure.

7A is a view illustrating a magnetic body 230 of a gear noise reduction apparatus according to an exemplary embodiment of the present invention, and FIG. 7B is a cross-sectional view taken along the line A-A of FIG. 7A.

7A to 7B, the magnetic body 230 of the gear noise reduction apparatus according to the exemplary embodiment of the present invention may be formed in a ring-shaped N pole and an S pole. 7A to 7B illustrate an example in which the S pole is formed below the N pole, but the positions of the N pole and the S pole may be changed.

The magnetic body 230 may be formed to combine the N pole and the S pole to complete a ring shape. In this case, the magnetic fluid may be lost since a magnetic field is not formed at a portion where the N pole and the S pole contact each other.

In addition, when the magnetic body 230 is disposed on the gear 210 (refer to FIG. 4 or 6) as in the embodiment of FIG. 4 or 6, the N and S poles of the magnetic body 230 are combined to complete a ring shape. When formed so as to change the magnetic field according to the rotation of the gear 210 (see Fig. 4 or 6) may affect the operation of the peripheral electronic device.

Therefore, the magnetic body 230 according to the exemplary embodiment of the present invention may be formed such that any one pole of the magnetic body 230 forms an intact ring shape as shown in FIG. 7A.

8A is a view illustrating a magnetic body 230 of a gear noise reduction apparatus according to still another exemplary embodiment of the present invention, and FIG. 8B is a cross-sectional view taken along the line B-B of FIG. 8A.

Referring to FIGS. 8A to 8B, the magnetic body 230 may include a first layer 231 formed of a ring-shaped N pole and a ring-shaped S pole inscribed therein, a ring-shaped S pole, and a ring-shaped inscribed therein. The second layer 233 formed as the N pole may be formed in a stacked form. 8A to 8B show that the ring-shaped N pole and the ring-shaped S pole inscribed therein form the first layer 231, but the ring-shaped S pole and the ring-shaped N pole inscribed therein are formed by the first layer 231. The first layer 231 may be formed. In this case, the second layer 233 may be formed of a ring-shaped N pole and a ring-shaped S pole inscribed thereto.

Compared to the magnetic body 230 of FIG. 7A, the magnetic body 230 of FIG. 8A may distribute the magnetic fluid more evenly and widely on the contact surface between the gear 210 and the housing 300 (see FIG. 4), thereby reducing noise and lubricating. Can be better.

An electronic device according to an embodiment of the present invention is a motor that is supplied with electric power to provide a driving force, the driving force is received from the motor, rotates about a rotating shaft, at least one gear disposed, the built-in gear and the rotating shaft A housing located therein, a contact area where a part of the gear and a part of the housing come into contact with each other during driving of the gear, a noise reducing member having magnetic properties, and a magnetic body disposed in at least a part area between the gear and the housing. And may include.

The gear may be formed of a diamagnetic material.

The method of claim 1,

The noise reduction member may be a magnetic liquid.

The magnetic material may be disposed on the housing side of the contact area.

The magnetic body may be disposed on the gear side of the contact region.

The magnetic body may be disposed on the housing side and the other side on the gear side with respect to the rotation axis direction of the gear in the contact region.

The magnetic body may be disposed in a ring shape such that the rotation shaft is positioned in the hollow of the ring.

The magnetic body may be formed in a ring-shaped N-pole and S-pole stacked.

The magnetic body may have a shape in which a first layer formed of a ring-shaped N pole and a ring-shaped S pole inscribed thereto and a second layer formed of a ring-shaped S pole and a ring-shaped N pole inscribed thereto may be stacked. have.

The gear may receive the driving force from the motor through a motor gear or a belt.

Gear noise reduction device according to an embodiment of the present invention is operated by receiving a driving force from the motor, the gear rotates around a rotation axis located in the housing, a portion of the gear and a portion of the housing during the drive of the gear contact And a noise reduction member having magnetic properties, and a magnetic material disposed at least in a partial region between the gear and the housing.

At least some of the gears may comprise diamagnetic materials.

The noise reduction member may include a magnetic liquid.

The magnetic body may be further disposed on the housing side of the contact region.

The magnetic body may be further disposed on the gear side of the contact region.

The magnetic body may be formed in a ring-shaped N-pole and S-pole stacked.

The magnetic body may include a first layer formed of a ring-shaped N pole and a ring-shaped S pole inscribed therein, and a second layer formed of a ring-shaped S pole and a ring-shaped N pole inscribed thereto.

Claims

A motor that receives electric power and provides a driving force;

A gear that receives a driving force from the motor, rotates about a rotation axis, and is disposed at least one;

A housing in which the gear is built and the rotation shaft is located;

A noise reduction member disposed in a contact region in which a part of the gear and a part of the housing come into contact with each other during driving of the gear, and having magnetic properties; And

And a magnetic body disposed in at least a partial region between the gear and the housing.
The method of claim 1,

And the gear is formed of an diamagnetic material.
The method of claim 1,

The noise reduction member is an electronic device.
The method of claim 1,

The magnetic body is disposed in the housing side of the contact region.
The method of claim 1,

The magnetic body is disposed on the gear side of the contact region.
The method of claim 1,

The magnetic body of the contact region, one side is disposed on the housing side with respect to the direction of the rotation axis of the gear, the other side is disposed on the gear side.
The method of claim 1,

The magnetic material has a ring shape and is disposed such that the rotation axis is located in the hollow of the ring.
The method of claim 7, wherein

The magnetic material,

An electronic device formed by laminating a ring-shaped N pole and an S pole.
The method of claim 7, wherein

The magnetic material is

An electronic device comprising a first layer formed of a ring-shaped N pole and a ring-shaped S pole inscribed therein, and a second layer formed of a ring-shaped S pole and a ring-shaped N pole inscribed thereto.
The method of claim 1,

And the gear receives the driving force from the motor through a motor gear or a belt.
A gear that operates by receiving a driving force from the motor and rotates about a rotation shaft positioned in the housing;

A noise reduction member disposed in a contact region in which a portion of the gear and a portion of the housing come into contact with each other during driving of the gear, and having magnetic properties; And

And a magnetic body disposed in at least a partial region between the gear and the housing.
The method of claim 11,

At least a portion of the gear comprises a diamagnetic material.
The method of claim 11,

The noise reduction member is a gear noise reduction device comprising a magnetic liquid (magnetic liquid).
The method of claim 11,

And the magnetic body is further disposed on the housing side of the contact region.
The method of claim 11,

And the magnetic body is further disposed on the gear side of the contact region.