Fixing member and head-mounted display device including same

Abstract

A head-mounted display device according to an embodiment of the present invention comprises: a wheel; a first plate that is coupled to the wheel and includes a first seating groove; a gear having a first surface arranged on the first plate; a second plate that is arranged on a second surface opposite to the first surface of the gear and includes a plurality of second seating grooves along the circumference; a protrusion having a first surface, at least a portion of which is arranged in the first seating groove, and a second surface that is opposite to the first surface and arranged in any one of the plurality of second seating grooves; and a body extending from the protrusion. Various other embodiments are possible.

Description

A fixed member and a head-mounted display device including the same

[0001] Various embodiments disclosed in this document relate to a fixing member and a head mounted display device including the same.

[0002] Wearable head-mounted display devices, which can be worn directly on the body as electronic devices to provide augmented reality (AR) or virtual reality (VR) services, are being developed. Wearable head-mounted display devices that provide AR or VR services are utilized in the gaming, education, entertainment, medical, and simulation fields, and can be provided in the form of a headset (head-mounted device, HMD) worn on the user's head.

[0003] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above-described matters constitute prior art related to the present disclosure.

[0004] Electronic devices in the form of a headset worn on the user's head (e.g., head-mounted display devices) may need to be adjusted in length to fit the circumference of the user's head.

[0005] The length adjustment mechanism of a head-mounted display device may operate differently when rotating clockwise or counterclockwise due to the gear's shape. This may result in the device not being fixed in the direction of shortening when the user adjusts the length of the head-mounted display device. Consequently, even after the user wears the head-mounted display device, its length may increase without the user's consent, making it difficult for the user to wear the device stably. Furthermore, the inability to provide consistent operation in both directions may degrade the user's operability.

[0006] The length adjustment mechanism of a head-mounted display device may only produce a clicking sound when rotated in one direction. This can cause an unpleasant, undesirable noise when the user adjusts the length. This noise can be particularly distracting in quiet environments.

[0007] The technical tasks to be achieved in this document are not limited to the technical tasks mentioned above, and other technical tasks not mentioned can be clearly understood by a person having ordinary knowledge in the technical field to which this document belongs from the description below.

[0008] A head-mounted display device according to one embodiment of the present invention may include a wheel, a first plate coupled to the wheel and including a first mounting groove, a gear having a first surface disposed on the first plate, a second plate having a plurality of second mounting grooves along a circumference disposed on a second surface of the gear opposite the first surface, and a protrusion having at least a portion of the first surface disposed in the first mounting groove and a second surface opposite the first surface disposed in one of the plurality of second mounting grooves, and a body extending from the protrusion.

[0009] The length adjustment mechanism of a head-mounted display device may have the same operating pattern when rotated clockwise and counterclockwise. This allows the user to experience a consistent operating feel when adjusting the length, making the user's operation intuitive.

[0010] The length of the head-mounted display device can be adjusted by the user's force of turning the wheel. Therefore, the user can adjust the length to their desired length before or after wearing the head-mounted display device. Furthermore, the length is stably fixed through the fixing member of the head-mounted display device, preventing the length from fluctuating while the user is wearing the head-mounted display device.

[0011] This reduces noise generated when adjusting the length of a head-mounted display device and improves operability. By reducing noise generated when adjusting the length of a head-mounted display device, it can be used more easily even in quiet environments. This provides users with a smoother operability.

[0012] In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar components.

[0013] FIG. 1A is a block diagram of a head mounted display device within a network environment according to one embodiment of the present disclosure.

[0014] FIG. 1B is a perspective view of a head mounted display device according to one embodiment of the present disclosure.

[0015] FIG. 1C is a front view of a display device of a head mounted display device according to one embodiment of the present disclosure.

[0016] FIG. 1D is a rear view of a display device of a head mounted display device according to one embodiment of the present disclosure.

[0017] FIG. 2A is an exploded perspective view of a length adjustment device of a head mounted display device according to one embodiment of the present disclosure.

[0018] FIG. 2B is a cross-sectional view of a length adjustment device of the head mounted display device of FIG. 2A, according to one embodiment of the present disclosure.

[0019] FIG. 2c is a drawing showing a fixing member of a length adjustment device according to one embodiment of the present disclosure.

[0020] FIG. 3A is a drawing of a first plate and a fixing member of a length adjustment device assembled according to one embodiment of the present disclosure.

[0021] FIG. 3b is a drawing of a second fixing member of a length adjustment device detached from a first plate according to one embodiment of the present disclosure.

[0022] FIG. 4A is a front view of the first plate, the fixing member, and the gear of the length adjustment device assembled according to one embodiment of the present disclosure.

[0023] Figure 4b is a cross-sectional view taken along line 4b-4b shown in Figure 4a.

[0024] FIG. 5A is a front view of the length adjustment device, the fixed member, and the second plate assembled according to one embodiment of the present disclosure.

[0025] Figure 5b is a cross-sectional view taken along line 5b-5b shown in Figure 5a.

[0026] Figure 5c is a plan view of Figure 5a.

[0027] FIG. 6A is a drawing illustrating the assembly of a gear, a rubber ring, and a second plate of a length adjustment device according to one embodiment of the present disclosure.

[0028] Figure 6b is a plan view of Figure 6a.

[0029] FIG. 7 is a front view of the wheel and the first housing of the length adjustment device assembled according to one embodiment of the present disclosure.

[0030] FIG. 8A is an enlarged front view of the wheel, elastic member, and first housing of the length adjustment device assembled according to one embodiment of the present disclosure.

[0031] Figure 8b is a cross-sectional view taken along line 8b-8b shown in Figure 8a.

[0032] Figure 9a is an enlarged plan view of the first housing of Figure 8a.

[0033] Figure 9b is an enlarged bottom view of the wheel of Figure 8a.

[0034] FIG. 10 is an enlarged front view of the wheel, ball, and first housing of the length adjustment device assembled according to one embodiment of the present disclosure.

[0035] Figure 11a is an enlarged plan view of the first housing of Figure 10.

[0036] Figure 11b is an enlarged bottom view of the wheel of Figure 10.

[0037] In the following description, various embodiments of this document are described with reference to the attached drawings. It should be understood that the various embodiments of this document and the terminology used herein are not intended to limit the technical features described herein to specific embodiments, but rather encompass various modifications, equivalents, or alternatives of the embodiments.

[0038] 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 an item may include one or more of said items, unless the context clearly indicates otherwise.

[0039] In this document, phrases such as "A or B," "at least one of A and B," "or at least one of B," "A, B, or C," "at least one of A, B, and C," and "at least one of B or C" can each include any one of the items listed together in that phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish the corresponding component from other corresponding components and do not limit the corresponding components in any other respect (e.g., importance or order). When a component (e.g., a first) is referred to as "coupled" or "connected" to another component (e.g., a second) with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through at least one third component. Therefore, the expressions connected or coupled include both direct connection / coupling and indirect connection / coupling.

[0040] FIG. 1A is a block diagram of a head mounted display device (100) in a network environment according to one embodiment of the present disclosure.

[0041] Referring to FIG. 1A, in a network environment, a head mounted display device (100) may communicate with a head mounted display device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of a head mounted display device (104) or a server (108) via a second network (199) (e.g., a long-range wireless communication network).

[0042] In one embodiment, the head mounted display device (100) may communicate with the head mounted display device (104) via a server (108).

[0043] In one embodiment, the head mounted display device (100) may include a processor (120), a memory (130), an input circuit (150), an audio output circuit (155), a display (160), an audio circuit (170), a sensor (176), an interface (177), a connection terminal (178), a haptic circuit (179), a camera (180), a power management circuit (188), a battery (189), a communication circuit (190), a subscriber identification circuit (196), or an antenna (197).

[0044] In one embodiment, the processor (120) may include at least one processor. The processor (120) may include processing circuitry.

[0045] In one embodiment, the head mounted display device (100) may have at least one of these components (e.g., the connection terminal (178)) omitted, or one or more other components added.

[0046] In one embodiment, some of the components of the head mounted display device (100) (e.g., sensor (176), camera (180), or antenna (197)) may be integrated into one component (e.g., display (160)).

[0047] In one embodiment, the processor (120) may control at least one other component (e.g., a hardware or software component) of the head mounted display device (100) connected to the processor (120) by executing, for example, software (e.g., a program (140)) and may perform various data processing or operations.

[0048] In one embodiment, as at least part of data processing or calculation, the processor (120) may store instructions or data received from another component (e.g., a sensor (176) or a communication circuit (190)) in volatile memory (132), process the instructions or data stored in volatile memory (132), and store resulting data in non-volatile memory (134).

[0049] In one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or an auxiliary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together with the main processor (121). For example, when the head mounted display device (100) includes the main processor (121) and the auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a given function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0050] In one embodiment, the auxiliary processor (123) may control at least a portion of functions or states associated with at least one component of the head mounted display device (100) (e.g., the display (160), the sensor (176), or the communication circuit (190)), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application running) state.

[0051] In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as part of another functionally related component (e.g., a camera (180) or communication circuitry (190)).

[0052] In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. Such learning may be performed, for example, within the head-mounted display device (100) itself where the artificial intelligence model is executed, or may be performed through a separate server (e.g., server (108)). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include a plurality of artificial neural network layers. The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0053] In one embodiment, the memory (130) may store various data used by at least one component (e.g., the processor (120) or the sensor (176)) of the head mounted display device (100). The data may include, for example, software (e.g., the program (140)) and input data or output data for commands related thereto. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0054] In one embodiment, the program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0055] In one embodiment, the input circuit (150) may receive commands or data to be used by a component of the head mounted display device (100) (e.g., a processor (120)) from an external source (e.g., a user) of the head mounted display device (100). The input circuit (150) may include, for example, a microphone, a mouse, a keyboard, keys (e.g., buttons), or a digital pen (e.g., a stylus pen).

[0056] In one embodiment, the audio output circuit (155) can output audio signals to the outside of the head-mounted display device (100). The audio output circuit (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0057] In one embodiment, the display (160) can visually present information to an external party (e.g., a user) of the head mounted display device (100). The display (160) can include, for example, a display, a holographic device, or a projector and control circuitry for controlling the device.

[0058] In one embodiment, the display (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the magnitude of a force generated by a touch.

[0059] In one embodiment, the audio circuit (170) can convert sound into an electrical signal, or vice versa.

[0060] In one embodiment, the audio circuit (170) may acquire sound through the input circuit (150), or output sound through the audio output circuit (155), or an external head mounted display device (e.g., head mounted display device (102)) (e.g., a speaker, headphone, case, or phone) directly or wirelessly connected to the head mounted display device (100).

[0061] In one embodiment, the sensor (176) may detect an operating state (e.g., power or temperature) of the head mounted display device (100) or an external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. In one embodiment, the sensor (176) may include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0062] In one embodiment, the sensor (176) may include at least one of an IR sensor, a red green blue (RGB) sensor, or an image sensor.

[0063] In one embodiment, the interface (177) may support one or more designated protocols that may be used to enable the head mounted display device (100) to connect directly or wirelessly with an external head mounted display device (e.g., head mounted display device (102)).

[0064] In one 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.

[0065] In one embodiment, the head mounted display device (102) may be the same or a different type of device as the head mounted display device (100).

[0066] In one embodiment, the head mounted display device (102) may include at least some of the components included in the head mounted display device (100). The head mounted display device (102) may include, for example, memory, a processor, a battery, or power management circuitry. The memory included in the head mounted display device (102) may store commands, data, or programs.

[0067] In one embodiment, all or part of the operations executed on the head mounted display device (100) may be executed on the head mounted display device (102). For example, when the head mounted display device (100) is to perform a function or service automatically or in response to a request from a user or another device, the head mounted display device (100) may, instead of executing the function or service itself or in addition, request one or more external head mounted display devices (e.g., the head mounted display device (102)) to perform the function or at least part of the service. The one or more external head mounted display devices (e.g., the head mounted display device (102)) receiving 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 the result of the execution to the head mounted display device (100). The head mounted display device (100) may process the result, either as is or additionally, and provide it as at least part of a response to the request. For example, the head mounted display device (102) renders content data executed in an application and transmits it to the head mounted display device (100), and the head mounted display device (100) that receives the data can output the content data to the display (160). If the head mounted display device (100) detects user movement through an IMU sensor or the like, the processor (120) of the head mounted display device (100) can correct the rendering data received from the head mounted display device (102) based on the movement information and output it to the display (160). Alternatively, the head mounted display device (100) can transmit the movement information to the head mounted display device (102) and request rendering so that the screen data is updated accordingly.

[0068] In one embodiment, the head mounted display device (102) may be a device of various forms, such as a case device capable of storing and charging the head mounted display device (100).

[0069] In one embodiment, the connection terminal (178) may include a connector through which the head mounted display device (100) may be physically connected to an external head mounted display device (e.g., head mounted display device (102)).

[0070] In one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0071] In one embodiment, the haptic circuit (179) may convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that a user can perceive through a tactile or kinesthetic sense. In one embodiment, the haptic circuit (179) may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0072] In one embodiment, the camera (180) can capture still images and video. In one embodiment, the camera (180) can include one or more lenses, image sensors, image signal processors, or flashes.

[0073] In one embodiment, the head mounted display device (100) may include at least one camera (180). For example, the at least one camera (180) included in the head mounted display device (100) may include a camera for acquiring a real-world image facing the outside of the head mounted display device (100) and a camera for tracking the eyes of a wearer of the head mounted display device (100).

[0074] In one embodiment, the power management circuit (188) can manage power supplied to the head mounted display device (100). The power management circuit (188) can be implemented, for example, as at least part of a power management integrated circuit (PMIC).

[0075] In one embodiment, a battery (189) may power at least one component of the head mounted display device (100). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0076] In one embodiment, the communication circuit (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the head mounted display device (100) and an external head mounted display device (e.g., head mounted display device (102), head mounted display device (104), or server (108)), and the performance of communication through the established communication channel. The communication circuit (190) may operate independently of the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication.

[0077] In one embodiment, the communication circuit (190) may include wireless communication circuit (192) (e.g., cellular communication circuit, short-range wireless communication circuit, or global navigation satellite system (GNSS) communication circuit) or wired communication circuit (194) (e.g., local area network (LAN) communication circuit, or power line communication circuit). Any of these communication circuits may communicate with an external head mounted display device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication circuits may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication circuit (192) can identify or authenticate the head mounted display device (100) within a communication network, such as the first network (198) or the second network (199), using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the subscriber identification circuit (196).

[0078] In one embodiment, the wireless communication circuit (192) can support a 5G network and next-generation communication technologies after a 4G network, such as new radio access technology (NR). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimizing terminal power and connecting multiple terminals (mMTC (massive machine type communications)), or high-reliability and low-latency communications (URLLC (ultra-reliable and low-latency communications)). The wireless communication circuit (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication circuit (192) can support various technologies for securing performance in high-frequency bands, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication circuit (192) can support various requirements specified in the head-mounted display device (100), an external head-mounted display device (e.g., the head-mounted display device (104)), or a network system (e.g., a second network (199)).

[0079] In one embodiment, the wireless communication circuit (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB implementation, a loss coverage (e.g., 164 dB or less) for mMTC implementation, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL) each, or 1 ms or less for round trip) for URLLC implementation.

[0080] In one embodiment, the antenna (197) can transmit or receive signals or power to or from an external device (e.g., an external head-mounted display device).

[0081] In one embodiment, the antenna (197) may include an antenna comprising a radiator formed of a conductor or conductive pattern formed on a substrate (e.g., a PCB).

[0082] In one embodiment, the antenna (197) may include a plurality of antennas (e.g., an array antenna). In such a case, at least one antenna suitable for a communication method used in a communication network, such as the first network (198) or the second network (199), may be selected from the plurality of antennas, for example, by the communication circuit (190). A signal or power may be transmitted or received between the communication circuit (190) and an external head-mounted display device via the at least one selected antenna.

[0083] In one embodiment, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna (197) in addition to the radiator.

[0084] In one embodiment, the antenna (197) may form a mmWave antenna circuit.

[0085] In one embodiment, a mmWave antenna circuit may include a printed circuit board, an RFIC positioned on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) positioned on or adjacent a second side (e.g., a top side or a side) of the printed circuit board and capable of transmitting or receiving signals in the designated high frequency band.

[0086] In one embodiment, at least some of the components included in the head mounted display device (100) can be connected to each other and exchange signals (e.g., commands or data) with each other through a communication method between peripheral devices (e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)).

[0087] In one embodiment, commands or data may be transmitted or received between the head mounted display device (100) and an external head mounted display device (104) via a server (108) connected to a second network (199). Each of the external head mounted display devices (102, or 104) may be the same or a different type of device as the head mounted display device (100).

[0088] In one embodiment, all or part of the operations executed on the head mounted display device (100) may be executed on one or more external head mounted display devices (102, 104, or 108). For example, if the head mounted display device (100) is to perform a function or service automatically or in response to a request from a user or another device, the head mounted display device (100) may, instead of executing the function or service itself or in addition, request one or more external head mounted display devices to perform the function or at least a part of the service. The one or more external head mounted display devices receiving 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 the result of the execution to the head mounted display device (100). The head mounted display device (100) may process the result, either as is or additionally, and provide it as at least a part of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technologies may be utilized, for example. The head-mounted display device (100) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In another embodiment, the external head-mounted display device (1804) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or neural networks.

[0089] In one embodiment, an external head-mounted display device (104) or server (108) may be included within the second network (199). The head-mounted display device (100) may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0090] FIG. 1b is a perspective view of a head mounted display device according to one embodiment of the present disclosure.

[0091] In one embodiment, the head mounted display device (100) may be, for example, a head mounted display (HMD), a face mounted display (FMD), or may be, but is not limited to, smart glasses or a headset that provides extended reality such as augmented reality (AR), virtual reality glass (VR), or mixed reality.

[0092] Referring to FIGS. 1A and 1B, a head mounted display device (100) can be worn on a part of a user's body (e.g., head or face) to provide a user interface.

[0093] In one embodiment, the head-mounted display device (100) may output images and / or videos to the user. Alternatively, the head-mounted display device (100) may provide images related to augmented reality services and / or virtual reality services. For example, the head-mounted display device (100) may provide the user with experiences of augmented reality, virtual reality, mixed reality, and / or extended reality.

[0094] For example, a head-mounted display device (100) can provide augmented reality to a user. The head-mounted display device (100) can transmit a virtual object image output from the display (160) toward the user's eyes, and the virtual object image can utilize data regarding images of the real world captured through a plurality of cameras (230a, 230b, 230c).

[0095] In one embodiment, the head mounted display device (100) may include a length adjustment function to improve a user's wearing comfort. For example, the first housing (900) (e.g., first band, first length adjustment device, back band) and / or the second housing (1000) (e.g., second band, second length adjustment device, side band)) of the head mounted display device (100) may be length-adjustable via a part of the user's body (e.g., head) via a wheel (300) (e.g., handle, rotating device, cap).

[0096] In one embodiment, referring to FIG. 1B, the lens housing (210), the first housing (900), and the second housing (1000) may form a side surface of a head mounted display device (100). The configuration of the head mounted display device (100) described above is an example, and the head mounted display device (100) may have at least one of the above-described configurations omitted or at least one configuration added.

[0097] FIG. 1C is a front view of a display device of a head-mounted display device according to one embodiment of the present disclosure. FIG. 1D is a rear view of a display device of a head-mounted display device according to one embodiment of the present disclosure.

[0098] In one embodiment, referring to FIGS. 1A through 1D, a head mounted display device (100) may include a display device (200) that outputs pictures and / or images to a user.

[0099] In one embodiment, some of the components of the head mounted display device (100) of FIG. 1A may include the display device (200) of FIGS. 1C and 1D.

[0100] In one embodiment, the display device (200) may include at least some of a lens housing (210), a plurality of cameras (230a, 230b, 230c), and a display (160).

[0101] In one embodiment, the display device (200) may include a lens housing (210). The lens housing (210) may be configured to accommodate at least one component. The lens housing (210) may include a first side (211a) (e.g., a front side), a second side (211b) opposite the first side (211a) (e.g., a back or wearing side), and a third side (211c) (e.g., a side side) between the first side (211a) and the second side (211b).

[0102] In one embodiment, the lens housing (210) may include a bridge (214). The bridge (214) may be configured to face a portion of the user's body, such as the nose. For example, the bridge (214) may be supported by the user's nose.

[0103] In one embodiment, the lens housing (210) may correspond to the body of the display device (200). The lens housing (210) may be identical to the body of the display device (200).

[0104] In one embodiment, the lens housing (210) may be mounted on the user's head by a wearing structure such as a template or strap.

[0105] In one embodiment, the display device (200) may include a lens structure (220). The lens structure (220) may include a plurality of lenses configured to adjust the focus of an image provided to a user. For example, the plurality of lenses may be configured to adjust the focus of an image output by the display (160). The plurality of lenses may be positioned at positions corresponding to positions of the display (160). The plurality of lenses may include, for example, a Fresnel lens, a pancake lens, a multi-channel lens, and / or any other suitable lens.

[0106] In one embodiment, the display (160) may be positioned corresponding to the lens structure (220).

[0107] In one embodiment, the display device (200) may include a display (160). The display (160) may be configured to provide an image (e.g., a virtual image) to a user. For example, the display (160) may include a liquid crystal display (LCD), a digital mirror device (DMD), a liquid crystal on silicon (LCoS), an organic light emitting diode (OLED), and / or a micro light emitting diode (micro LED).

[0108] In one embodiment, when the display (160) includes at least one of a liquid crystal display (LCD), a digital mirror display, or a silicon liquid crystal display, the display device (200) may include a light source that irradiates light onto a screen output area of ​​the display (160).

[0109] In one embodiment, if the display (160) can generate light on its own, for example, if the display (160) includes at least one of an organic light emitting diode or a micro LED, the display device (200) can provide a good quality virtual image to the user even without including a separate light source.

[0110] In one embodiment, if the display (160) includes an organic light-emitting diode or micro LED, a light source is unnecessary, so the display device (200) can be made lightweight. The display device (200) can include the display (160) and at least one transparent member. A user can use the display device (200) while wearing it on their face. The at least one transparent member can be formed of a glass plate, a plastic plate, or a polymer, and can be manufactured to be transparent or translucent.

[0111] In one embodiment, at least one transparent member may be positioned to face the user's right or left eye.

[0112] In one embodiment, if the display (160) is transparent, it may be positioned so as to face the user's eyes and form a screen display unit. In one embodiment, the display (160) may include a light source (not shown) configured to transmit a light signal to an area where an image is output.

[0113] In one embodiment, the display (160) can provide images to the user by generating optical signals on its own.

[0114] In one embodiment, the display (160) may be positioned on the second side (211b) of the lens housing (210). For example, one side of a pair of lenses of the display (160) may be positioned so that it is exposed to the outside through the second side (211b).

[0115] In one embodiment, the display (160) may be composed of organic light emitting diodes (OLEDs). For example, OLEDs can express red (R, red), green (G, green), and blue (B, blue) through self-luminescence of organic materials. However, the present invention is not limited thereto, and one pixel may include R, G, and B, and one chip may be implemented with multiple pixels including R, G, and B.

[0116] In one embodiment, the display (160) can display various images. Here, the image is a concept including still images and moving images, and the display (160) can display various images such as broadcast content, multimedia content, etc. In addition, the display (160) can also display a user interface (UI) and icons.

[0117] In one embodiment, the display (160) includes a separate IC chip, and the IC chip can display an image based on an image signal received from the processor (120). In one embodiment, the IC chip can generate driving signals for a plurality of light-emitting elements based on the image signal received from the processor (120), and display an image by controlling the light emission of a plurality of pixels included in the display panel based on the driving signals.

[0118] In one embodiment, the display (160) may include a plurality of pixels for displaying a virtual image. The display (160) may further include infrared pixels that emit infrared light.

[0119] In one embodiment, the display (160) may further include a photo-receiving pixel (e.g., a photo sensor pixel) disposed between the pixels and configured to receive light reflected from a user's eyes, convert it into electrical energy, and output it. The photo-receiving pixel may be referred to as a "gaze tracking sensor." The gaze tracking sensor may detect infrared light reflected by the user's eyes from light emitted by infrared pixels included in the display (160).

[0120] In one embodiment, the display device (200) can detect the user's gaze direction (e.g., eye movement) through light-receiving pixels.

[0121] In one embodiment, the display device (200) may determine the location of the center of the virtual image based on the gaze directions of the user's left and right eyes (e.g., the direction in which the pupils of the user's left and right eyes are looking) detected through one or more light-receiving pixels.

[0122] In one embodiment, the display device (200) may include at least one display. The display device (200) may include the display (160) as a main display and a 3D display as a secondary display or an external display.

[0123] In one embodiment, the display (160) may include a condenser lens and / or a transparent waveguide. For example, the transparent waveguide may be at least partially positioned on a portion of the glass.

[0124] In one embodiment, light emitted from the display (160) may be incident on one end of the glass, and the incident light may be transmitted to the user through a waveguide and / or waveguide (e.g., waveguide) formed within the glass. The waveguide may be made of glass, plastic, or polymer, and may include a nano-pattern formed on one inner or outer surface, for example, a grating structure having a polygonal or curved shape.

[0125] In one embodiment, the incident light can be propagated or reflected within the waveguide by the nano-pattern and provided to the user.

[0126] In one embodiment, the waveguide may include at least one diffractive element (e.g., a diffractive optical element (DOE), a holographic optical element (HOE)) or at least one reflective element (e.g., a reflective mirror).

[0127] In one embodiment, the waveguide can guide display light emitted from a light source to a user's eye using at least one diffractive element or reflective element.

[0128] In one embodiment, the waveguide serves to transmit light generated by the display to the user's eyes.

[0129] In one embodiment, the waveguide may be made of glass, plastic, or polymer and may include nano-patterns formed on some of its internal or external surfaces, for example, a grating structure having a polygonal or curved shape.

[0130] In one embodiment, light incident on one end of the waveguide can be propagated inside the display (140) optical waveguide by the nano-pattern and provided to the user. In addition, the optical waveguide composed of a free-form prism can provide the incident light to the user through a reflective mirror. The optical waveguide can include at least one diffractive element (e.g., a Diffractive Optical Element (DOE), a Holographic Optical Element (HOE)) or at least one reflective element (e.g., a reflective mirror). The optical waveguide can guide display light emitted from a light source unit to the user's eyes by using at least one diffractive element or reflective element included in the optical waveguide.

[0131] In one embodiment, the diffractive element may include an input optical member / output optical member (not shown). For example, the input optical member may mean an input grating area, and the output optical member (not shown) may mean an output grating area. The input grating area may serve as an input terminal that diffracts (or reflects) light output from (e.g., a Micro LED) to transmit the light to a transparent member (e.g., a first transparent member, a second transparent member) of a screen display unit. The output grating area may serve as an outlet that diffracts (or reflects) light transmitted to a transparent member (e.g., a first transparent member, a second transparent member) of a waveguide to a user's eye.

[0132] In one embodiment, the reflective element may comprise a total internal reflection (TIR) ​​optical element or waveguide for total internal reflection. For example, total internal reflection may refer to a method of guiding light such that light (e.g., a virtual image) entering through the input grating region is 100% reflected from a first surface (e.g., a specific surface) of the waveguide, thereby transmitting 100% of the light to the output grating region.

[0133] In one embodiment, light emitted from the display (160) may be guided along an optical path through an input optical element into a waveguide. Light traveling within the waveguide may be guided toward the user's eyes through an output optical element. The screen display may be determined based on the light emitted toward the user's eyes.

[0134] In one embodiment, the display device (200) may include a sensor (176). The sensor (176) may be configured to detect the depth of a subject. The sensor (176) may be configured to transmit a signal toward the subject and / or receive a signal from the subject. For example, the transmitted signal may include near infrared, ultrasound, and / or laser. The sensor (176) may be configured to measure the time of flight (ToF) of the signal to measure the distance between the display device (200) and the subject. The sensor (176) may be disposed on a first surface (211a) of the lens housing (210).

[0135] In one embodiment, the sensor (176) may include a depth sensor. The depth sensor may be used to determine the distance to an object. The depth sensor (e.g., the depth sensor (235) of FIG. 1C) may include ToF (Time of Flight) technology. ToF technology may include technology that measures the distance to an object using signals (such as near-infrared, ultrasound, or laser). ToF technology may measure the time of flight of a signal by transmitting a signal and measuring the signal at a receiving unit.

[0136] In one embodiment, the camera (180) of FIG. 1a may include multiple cameras (230a, 230b, 230c).

[0137] In one embodiment, the plurality of cameras (230a, 230b, 230c) may include at least some of the first camera (230a), the second camera (230b), or the third camera (230c). The plurality of cameras (230a, 230b, 230c) may capture images of the exterior of the lens housing (210), for example, a user and / or other subjects. For example, the plurality of cameras (230a, 230b, 230c) may convert optical signals into input data and provide the data to the processor (120). In one embodiment, the processor (120) may receive the received input data and transmit output data to the display (160). The processor (120) may combine data received from each of the plurality of cameras (230a, 230b, 230c) and process the combined data to control the display (160).

[0138] In one embodiment, a first camera (230a) including at least one camera for capturing and a second camera (230b) including at least one camera for recognizing are spaced apart from a first surface (211a) of a lens housing (210) so as to capture a direction in which the first surface (211a) of the lens housing (210) faces.

[0139] In one embodiment, the camera (180) of FIG. 1A may include at least a portion of a first camera (230a), a second camera (230b), or a third camera (230c).

[0140] In one embodiment, the first camera (230a) and the second camera (230b) may be spaced apart from each other on the first side (211a) of the lens housing (210). The first camera (230a) and the second camera (230b) may be positioned to face different directions to capture various directions, such as the first side (211a) or the third side (211c).

[0141] In one embodiment, the first camera (230a) may be configured to acquire an image from a subject. The first camera (230a) may be formed in plurality, and one of the plurality of first cameras (230a) may be disposed in a portion of the first surface (211a) of the lens housing (210), and another first camera (230a) may be disposed in a portion of the first surface (211a) of the lens housing (210) and another portion of the lens housing (210).

[0142] In one embodiment, a plurality of first cameras (230a) may be positioned on each side of the depth sensor (235). The plurality of first cameras (230a) may include an image stabilizer actuator (not shown) and / or an autofocus actuator (not shown). For example, the plurality of first cameras (230a) may include at least one of a camera configured to acquire a color image, a global shutter camera, a rolling shutter camera, or a combination thereof.

[0143] In one embodiment, the second camera (230b) may be configured to recognize a subject. The second cameras (230b) may be formed in multiple numbers, and the multiple second cameras (230b) may be configured to detect and / or track an object (e.g., a human head or hand) or space with three or six degrees of freedom. For example, the multiple second cameras (230b) may include global shutter cameras. The multiple second cameras (230b) may be configured to perform simultaneous localization and mapping (SLAM) using depth information of the subject. The multiple second cameras (230b) may be configured to recognize gestures of the subject.

[0144] In one embodiment, a plurality of second cameras (230b) may be arranged on the first side (211a) of the lens housing (210). The expression “arranged” may include not only cases where they are directly arranged, but also cases where they are indirectly arranged.

[0145] In one embodiment, the first camera (230a) and the second camera (230b) may be cameras for taking pictures, and may be referred to as high resolution (HR) or photo video (PV) cameras, and may include high-resolution cameras. The first camera (230a) and the second camera (230b) may include a color camera equipped with functions for obtaining high-quality images, such as an auto focus (AF) function and an optical image stabilizer (OIS). However, the present invention is not limited thereto, and the first camera (230a) and the second camera (230b) may include a global shutter (GS) camera or a rolling shutter (RS) camera.

[0146] In one embodiment, the display device (200) may include a plurality of third cameras (230c). The plurality of third cameras (230c) may be configured to recognize a user's face. For example, the plurality of third cameras (230c) may be configured to detect and track a user's facial expression.

[0147] In one embodiment, the third camera (230c) may include at least one camera for facial recognition or at least one camera for eye tracking.

[0148] In one embodiment, the display device (200) may further include an eye tracking camera in at least some of the plurality of third cameras (230c). The eye tracking camera may be used to detect and track eye movements.

[0149] In one embodiment, the third camera (230c) can detect and track the pupil. The third camera (230c) can include multiple cameras corresponding to the left and right eyes.

[0150] In one embodiment, at least one of the plurality of cameras (230a, 230b, 230c) may include a camera used for 3 degrees of freedom (DoF), 6 degrees of freedom (DoF) head tracking, hand detection and tracking, gesture and / or spatial recognition.

[0151] In one embodiment, at least one of the plurality of cameras (230a, 230b, 230c) may include a global shutter (GS) camera for detecting and tracking head and hand movements. For example, a stereo camera may be used for head tracking and spatial recognition, so two global shutter (GS) cameras of the same specification and performance may be used, and a rolling shutter (RS) camera may be used to detect and track fine movements such as rapid hand and finger movements.

[0152] In one embodiment, at least one of the plurality of cameras (230a, 230b, 230c) may be primarily, but not necessarily limited to, a global shutter (GS) camera having superior camera performance (e.g., image drag) compared to other cameras, and for example, a rolling shutter (RS) camera may be used. At least one of the plurality of cameras (230a, 230b, 230c) may perform spatial recognition for six degrees of freedom (DoF) and simultaneous localization and mapping (SLAM) functions through depth capturing. At least one of the plurality of cameras (230a, 230b, 230c) may also perform a user gesture recognition function.

[0153] In one embodiment, the display device (200) may include an inertial measurement unit (IMU) sensor. The IMU sensor may include at least one of an acceleration sensor, a gyroscope, or a magnetometer. The display device (200) may detect a user's movement based on the IMU sensor.

[0154] In one embodiment, although not shown in the drawing, the display device (200) may include at least some of a sensor (not shown), a lighting unit (not shown), a plurality of microphones (not shown), a plurality of speakers (not shown), a battery (not shown), and a printed circuit board (not shown).

[0155] In one embodiment, the sensors (not shown) may be present in one or more configurations for various purposes (e.g., a gyro sensor, an acceleration sensor, a geomagnetic sensor, and / or a gesture sensor), and for example, the sensors (not shown) may perform at least one of head tracking for six degrees of freedom (DoF), pose estimation & prediction, gesture and / or spatial recognition, and / or slam functionality with depth imaging.

[0156] In one embodiment, the lighting unit (not shown) may have various uses depending on the location to which it is attached. For example, the lighting unit (not shown) may be attached around the second side (211b) of the display device (200). The lighting unit (not shown) may be used as an auxiliary means to facilitate eye gaze detection when the eye tracking camera (not shown) captures the pupil. The lighting unit (not shown) may use an IR LED (infra-red light emitting device) of visible light wavelength or infrared wavelength.

[0157] For example, a lighting unit (not shown) may be attached to the front (211a) of the display device (200) or its surroundings. The lighting unit (not shown) may be used as a means to supplement the surrounding brightness when multiple front cameras (230a, 230b) are shooting. The lighting unit (not shown) may be used particularly in dark environments or when it is difficult to detect a subject to be shot due to mixed or reflected light from multiple light sources.

[0158] In one embodiment, the lighting unit (not shown) may be omitted. The lighting unit (not shown) may be replaced by an infrared pixel included in the display (140). The lighting unit (not shown) may also be included in the display device (200) to assist the infrared pixels included in the display (160).

[0159] In one embodiment, multiple microphones (not shown) can process external acoustic signals into electrical audio data. The processed audio data can be utilized in various ways depending on the function being performed (or the application being executed) on the display device (200).

[0160] In one embodiment, a plurality of speakers (not shown) can output audio data received from the communication circuit or stored in the memory (120).

[0161] In one embodiment, one or more batteries (not shown) may be included in the display device (200) and may supply power to components that make up the display device (200).

[0162] In one embodiment, a printed circuit board (not shown) can transmit electrical signals to each circuit (e.g., camera, display, audio, or sensor) and other printed circuit boards through a flexible printed circuit board (FPCB).

[0163] In one embodiment, a printed circuit board (not shown) may have a control circuit (not shown) located thereon that controls components that make up the display device (200).

[0164] FIG. 2A is an exploded perspective view of a length adjustment device (1100) of a head mounted display device (100) according to one embodiment of the present disclosure. FIG. 2B is a cross-sectional view of a length adjustment device (1100) of a head mounted display device (100) of FIG. 2A according to one embodiment of the present disclosure. FIG. 2C is a drawing showing a fixing member of a length adjustment device (1100) according to one embodiment of the present disclosure.

[0165] In one embodiment, referring to FIGS. 1A to 2B, the head mounted display device (100) may include a length adjustment device (1100) that can adjust the length to correspond to a part of the user's body (e.g., head or face).

[0166] In one embodiment, the length adjustment device (1100) of FIGS. 2A and 2B may refer to the head mounted display device (100) of FIG. 1A. In one embodiment, some of the components of the head mounted display device (100) of FIG. 1A may include the length adjustment device (1100) of FIGS. 2A and 2B.

[0167] In one embodiment, referring to FIGS. 2A and 2B, the length adjustment device (1100) may include a wheel (300) (e.g., a handle, a swivel device, a cap), a first plate (400) (e.g., a link), a fixing member (700) (e.g., a locker), a gear (500), a second plate (600) (e.g., a holder), a first housing (900) (e.g., a first band, a first length adjustment device, a back band), and / or a second housing (1000) (e.g., a second band, a second length adjustment device, a side band).

[0168] In one embodiment, the wheel (300) may refer to a user-operated portion of the length adjustment device (1100). For example, the user may adjust the length of the second housing (1000) by rotating the wheel (300).

[0169] In one embodiment, a fixing member (700) (e.g., a locker) may be disposed on at least a portion of the first plate (400) and the second plate (600) to adjust the length of the second housing (1000) by controlling the rotation of the gear (500). For example, when a user rotates the wheel (300) such that the first plate (400) rotates in a first direction (S1) about a rotational axis (e.g., the y-axis of FIG. 2b) by a predetermined angle (e.g., 4 degrees in the first direction (S1) with respect to the y-axis of FIG. 2a), at least a portion of the fixing member (700) may be detached from at least a portion of the first plate (400) and the second plate (600). For example, when a user places a wheel (300), at least a portion of the fixing member (700) can be repositioned on at least a portion of the first plate (400) and the second plate (600) via a spring (730) disposed between the first fixing member (701) and the second fixing member (702).

[0170] In one embodiment, at least a portion of the fixing member (700) is disposed on at least a portion of the first plate (400) (e.g., a link) to adjust the length of the second housing (1000) by controlling the rotation of the gear (500). In one embodiment, when the wheel (300) rotates in the first direction (S1) or the second direction (S2) about the rotational axis (e.g., the y-axis of FIG. 2A), the first plate (400) can rotate in the same direction as the wheel (300) by an angle equal to the rotational angle of the wheel (300) (e.g., the wheel (300) of FIG. 2A). The first plate (400) and the gear (500) may have a rotational parallax of a certain angle (e.g., 4 degrees in the first direction (S1) with respect to the y-axis of FIG. 2A). For example, when a user rotates the wheel (300) so that the first plate (400) rotates in the first direction (S1) around the rotation axis (e.g., the y-axis in FIG. 2a), the gear (500) can rotate in the first direction (S1) by an angle equal to the rotation angle of the first plate (400) (e.g., the first plate (400) in FIG. 2a) after the first plate (400) deviates by a certain angle (e.g., 4 degrees in the first direction (S1) around the y-axis in FIG. 2a).

[0171] In one embodiment, at least a portion of the fixing member (700) may be disposed on at least a portion of the second plate (600) (e.g., a holder) to adjust the length of the second housing (1000) by controlling the rotation of the gear (500). For example, when a user rotates the wheel (300) so that the first plate (400) rotates in a first direction (S1) about a rotational axis (e.g., the y-axis in FIG. 2B) by a predetermined angle (e.g., 4 degrees in the first direction (S1) about the y-axis in FIG. 2A), at least a portion of the fixing member (700) may be detached from at least a portion of the first plate (400) and the second plate (600), so that the gear (500) may rotate about the rotational axis. For example, when a user releases the wheel (300), at least a portion of the fixing member (700) may be repositioned to at least a portion of the first plate (400) and the second plate (600) via a spring (730) disposed between the first fixing member (701) and the second fixing member (702) to prevent or reduce rotation of the gear (500). In one embodiment, the second plate (600) may include an internal space (600c) into which at least a portion of the gear (500) is inserted. The internal space (600c) of the second plate (600) facing the z-axis of FIG. 2A may be formed to be open.

[0172] In one embodiment, the second housing (1000) (e.g., a side band) may be adjusted in length to fit the size of a part of the user's body (e.g., a head). The second housing (1000) may include a gear structure (1010) corresponding to the teeth (510) of the gear (500). For example, when the gear (500) rotates by the rotation of the wheel (300) and the first plate (400), the teeth (510) of the gear (500) may mesh with the gear structure (1010) of the second housing (1000) through the internal space (600c) of the open second plate (600), thereby adjusting the length of the second housing (1000).

[0173] In one embodiment, a first housing (900) (e.g., a back band) may be arranged to surround a rear surface (e.g., a surface facing the +y axis in FIG. 2A) of a head mounted display device (e.g., a head mounted display device (100) of FIG. 2A). A wheel (300) may be arranged on at least a portion of a first surface (e.g., a surface facing the +y axis in FIG. 2A) of the first housing (900), and a second surface (e.g., a surface facing the -y axis in FIG. 2A) of the first housing (900) may be arranged to surround a second housing (1000).

[0174] In one embodiment, referring to FIG. 2A, the rotation of the wheel (300) (e.g., wheel (300) of FIG. 2A), the first plate (400), and the second plate (600) about their rotation axes (e.g., the y-axis of FIG. 2A) in a first direction (S1) may be a clockwise rotation. The rotation of the wheel (300) (e.g., wheel (300) of FIG. 2A), the first plate (400), and the second plate (600) about their rotation axes (e.g., the y-axis of FIG. 2A) in a second direction (S2) may be a counterclockwise rotation.

[0175] In one embodiment, the wheel (300) and the first plate (400) may be joined with screws (not shown).

[0176] In one embodiment, referring to FIGS. 2a, 2b, and 4a, 4b, 5a, and 5b described below, the first plate (400), the fixing member (700), and the gear (500), and / or the second plate (600) can be coupled by a fitting connection.

[0177] In one embodiment, referring to FIGS. 2A, 2B, and 2C, the fixing member (700) may include a first fixing member (701) and a second fixing member (702). The second fixing member (702) may be formed to be symmetrical in shape with respect to the rotational axis of the wheel (300) (e.g., the y-axis in FIG. 2A).

[0178] In one embodiment, referring to FIG. 2A and FIG. 5A described below, the fixing member (700) may include a first face (700a) (e.g., a face facing the +y-axis in FIG. 2A) and a second face (700b) opposite the first face (700a) (e.g., a face facing the -y-axis in FIG. 2A). The first fixing member (701) may include a first face (701a) and a second face (701b) opposite the first face (701a). The second fixing member (702) may include a first face (702a) and a second face (702b) opposite the first face (702a).

[0179] In one embodiment, referring to FIG. 2A and FIG. 4A described below, a first surface (700a) of a fixing member (700) (e.g., a surface facing the +y-axis in FIG. 2A) may be disposed on a second surface (400b) of a first plate (400) (e.g., a surface facing the -y-axis in FIG. 2A).

[0180] In one embodiment, referring to FIG. 2A and FIG. 5A described below, a second surface (700b) of a fixing member (700) (e.g., a surface facing the -y-axis in FIG. 2A) may be disposed on a first surface (600a) of a second plate (600) (e.g., a surface facing the +y-axis in FIG. 2A).

[0181] In one embodiment, referring to FIGS. 2a and 2b, the first fixing member (701) and the second fixing member (702) may be connected by a spring (730).

[0182] In one embodiment, referring to FIGS. 2A, 2B, and 3A and 5C described below, the first fixing member (701) and the second fixing member (702) can move linearly in the first guide (430) of the first plate (400) via a spring (730). The first fixing member (701) and the second fixing member (702) can move linearly in the second guide (540) of the gear (500) via the spring (730). The first guide (430) and the second guide (540) can be arranged in a substantially parallel direction (e.g., the x-axis direction of FIG. 2A). Each of the first guide (430) and the second guide (540) may be arranged on a first surface (700a) (e.g., a surface facing the +y axis in FIG. 2a) and a second surface (700b) (e.g., a surface facing the -y axis in FIG. 2a) of the fixed member (700).

[0183] In one embodiment, referring to FIG. 2C, the fixing member (700) may include a protrusion (710) and a body (720). The body (720) may extend from the protrusion (710). In the following description, the fixing member (700) is described as being divided into the protrusion (710) and the body (720), but the fixing member (700) may not be physically divided. The protrusion (710) and the body (720) may be conceptually divided for the convenience of describing the fixing member (700).

[0184] In one embodiment, referring to FIG. 2c and FIG. 3a described below, the first fixing member (701) may include a first protrusion (711) and a first body (721). The first body (721) may extend from the first protrusion (711).

[0185] In one embodiment, referring to FIG. 2c and FIG. 3a described below, the second fixing member (702) may include a second protrusion (712) and a second body (722). The second body (722) may extend from the second protrusion (712).

[0186] In one embodiment, referring to FIG. 2c, the protrusion (710) may include a first-first side (740-1), a first-second side (740-2), a second side (750), a third-first side (760-1), a third-second side (760-2), and a fourth side (770).

[0187] In one embodiment, referring to FIG. 2c and FIGS. 3b and 5c described below, the first protrusion (711) of the first fixing member (701) may include a first-first side (741-1), a first-second side (741-2), a second side (751), a third-first side (761-1), a third-second side (761-2), and a fourth side (771). The first protrusion (712) of the second fixing member (702) may include a first-first side (742-1), a first-second side (742-2), a second side (752), a third-first side (762-1), a third-second side (762-2), and a fourth side (772).

[0188] In one embodiment, referring to FIGS. 2A, 2C, and FIGS. 3B and 5C described below, the first-first side (740-1), the first-second side (740-2), and the second side (750) of the protrusion (710) may be formed on the first side (700a) of the fixing member (700) (e.g., the side facing the +y-axis in FIG. 2A). The first-first side (741-1), the first-second side (741-2), and the second side (751) of the first protrusion (711) may be formed on the first side (701a) of the first fixing member (701) (e.g., the side facing the +y-axis in FIG. 2A). The first-first side (742-1), the first-second side (742-2), and the second side (752) of the second protrusion (712) can be formed on the first side (702a) of the second fixing member (702) (e.g., the side facing the +y axis in FIG. 2a).

[0189] In one embodiment, referring to FIGS. 2A, 2C, and FIGS. 3B and 5C described below, the first-first side (740-1) and the first-second side (740-2) may extend in an inclined direction from the second side (750) to the second side (750). The first-first side (740-1) and the first-second side (740-2) may be formed in a shape that is symmetrical with respect to the second side (750).

[0190] In one embodiment, referring to FIGS. 2A, 2C, and FIGS. 3B and 5C described below, the third-first side (760-1), the third-second side (760-2), and the fourth side (770) of the protrusion (710) may be formed on the second side (700b) of the fixing member (700) (e.g., the side facing the -y axis in FIG. 2A). The third-first side (761-1), the third-second side (761-2), and the fourth side (771) of the first protrusion (711) may be formed on the second side (701b) of the first fixing member (701) (e.g., the side facing the -y axis in FIG. 2A). The second protrusion (712) third-first side (762-1), third-second side (762-2), and fourth side (772) can be formed on the second side (702b) of the second fixing member (702) (e.g., the side facing the -y axis in FIG. 2a).

[0191] In one embodiment, referring to FIGS. 2A, 2C, and FIGS. 3B and 5C described below, the third-first side (760-1) and the third-second side (760-2) may extend from the fourth side (770) in a direction perpendicular to the fourth side (770) (e.g., the x-axis direction in FIG. 2A). The third-first side (760-1) and the third-second side (760-2) may be formed in a shape that is symmetrical with respect to the fourth side (770).

[0192] In one embodiment, the first-first side (740-1) and the first-second side (740-2) are formed in a shape symmetrical with respect to the second side (750), and the third-first side (760-1) and the third-second side (760-2) are formed in a shape symmetrical with respect to the fourth side (770), so that the fixing member (700) can have the same operating form when the wheel (300) rotates in the first direction (S1) or the second direction (S2). For example, when the fixing member (700) is detached from at least a portion of the first plate (400) and the second plate (600) by the rotation of the wheel (300) in the first direction (S1) or the second direction (S2), the length of the second housing (1000) can be adjusted. This allows the user to receive a consistent operating feeling when adjusting the length of the second housing (1000), so that the user's operation can be intuitive.

[0193] FIG. 3A is a drawing of a first plate (400) and a fixing member (700) of a length adjusting device (1100) according to one embodiment of the present disclosure in an assembled state. FIG. 3B is a drawing of a second fixing member (702) of a length adjusting device (1100) according to one embodiment of the present disclosure in a detached state from the first plate (400). FIG. 4A is a front view of a first plate (400), a fixing member (700), and a gear (500) of a length adjusting device (1100) according to one embodiment of the present disclosure in an assembled state. FIG. 4B is a cross-sectional view taken along line 4b-4b illustrated in FIG. 4A.

[0194] In one embodiment, referring to FIGS. 4A and 4B, the gear (500) may include a first portion (520) and a second portion (530). The first portion (520) may be formed to extend from the second portion (530) in the +y-axis direction of FIG. 4A. In the following description, the gear (500) is described as being divided into the first portion (520) and the second portion (530), but the gear (500) may not be physically divided. The first portion (520) and the second portion (530) may be conceptually divided for the convenience of describing the gear (500).

[0195] In one embodiment, referring to FIGS. 4A and 4B, the gear (500) may include a first face (500a) (e.g., a face facing the +y-axis in FIG. 4A) and a second face (500b) opposite the first face (500a) (e.g., a face facing the -y-axis in FIG. 4A). The first portion (520) of the gear (500) may include a first face (500a) (e.g., a face facing the +y-axis in FIG. 4A) and a second face (not shown) opposite the first face (500a) (e.g., a face facing the -y-axis in FIG. 4A). The second part (520) of the gear (500) may include a first surface (not shown) (e.g., a surface facing the +y axis in FIG. 4a) and a second surface (500b) opposite to the first surface (500a) (e.g., a surface facing the -y axis in FIG. 4a).

[0196] In one embodiment, referring to FIGS. 2A, 4A, and 4B and FIGS. 5A and 5C described below, the first portion (520) (hub) may be disposed on the first plate (400) and the second plate (600) on which the fixing member (700) is disposed, so as to adjust the length of the second housing (1000). In one embodiment, the first portion (520) of the gear (500) and the fixing member (700) may be fittedly coupled to the first plate (400) and the second plate (600). The first surface (500a) of the first portion (520) and the first surfaces (701a, 702a) of the fixing member (700) may be disposed to face the first plate (400). The second side (not shown) of the first part (520) and the second side (701b, 702b) of the fixed member (700) can be arranged to face the second plate (600).

[0197] In one embodiment, referring to FIGS. 2A, 4A, and 4B and FIGS. 5A and 5C described below, the second portion (530) may include teeth (e.g., teeth or teeth) (510). The teeth (510) may be formed at regular intervals. The teeth (510) may mesh with the teeth structure (1010) of the second housing (1000) so that the length of the second housing (1000) may be adjusted when the gear (500) rotates. In one embodiment, the second portion (530) of the gear (500) may be fitted into the internal space (600c) of the second plate (600). The second portion (530) may be fitted into the second plate (600) so as to be directly or indirectly coupled thereto. The second side (500b) of the second part (520) can be arranged to face the second plate (600).

[0198] In one embodiment, referring to FIGS. 3A to 4B, the first plate (400) may include a first side (400a) (e.g., a side facing the +y-axis in FIG. 3A) and a second side (400b) opposite the first side (400a) (e.g., a side facing the -y-axis in FIG. 3A).

[0199] In one embodiment, referring to FIGS. 3A, 3B, 4A, and 4B, a first surface (701a) (e.g., a surface facing the -y-axis in FIG. 3A) of a first fixing member (701) may be disposed on a second surface (400b) of a first plate (e.g., a surface facing the +y-axis in FIG. 3A). In one embodiment, a first surface (702a) of a second fixing member (702) may be disposed on a second surface (400b) of the first plate.

[0200] In one embodiment, referring to FIGS. 3A and 3B, the first plate (400) may include a first mounting groove (410) (e.g., a first groove, a first recess, a first hole, a gap) in which a protrusion (710) of a fixing member (700) is disposed. The first mounting groove (410) may include a first-first mounting groove (411) in which a first protrusion (711) of a first fixing member (701) is disposed, and a first-second mounting groove (412) in which a second protrusion (712) of a second fixing member (702) is disposed.

[0201] In one embodiment, a first surface (700a) (e.g., a surface facing the +y-axis in FIG. 4a) of a protrusion (710) of a fixing member (700) may be placed on a second surface (400b) (e.g., a surface facing the -y-axis in FIG. 4a) of a first plate (400).

[0202] In one embodiment, referring to FIGS. 3A and 3B, the first anchoring groove (410) may be formed by recessing in the +y-axis direction of FIG. 3A on the second surface (400b) of the first plate (400) (e.g., the surface facing the -y-axis of FIG. 3A).

[0203] In one embodiment, the first anchoring groove (410) may include an inclined section (4101) on which the first-first side (740-1) and the first-second side (740-2) of the protrusion (710) of the fixing member (700) are arranged. The inclined section (4101) may be formed in a shape corresponding to the first-first side (740-1) and the first-second side (740-2) of the protrusion (710) of the fixing member (700).

[0204] In one embodiment, referring to FIGS. 3a and 3b, the first-first fixing groove (411) may include a first inclined section (4111) on which the first-first side (741-1) and the first-second side (741-2) of the first protrusion (711) of the first fixing member (701) are arranged. The first inclined section (4111) may be formed in a shape corresponding to the first-first side (741-1) and the first-second side (741-2) of the first fixing member (701).

[0205] In one embodiment, referring to FIGS. 3a and 3b, the first-second anchoring groove (412) may include a second inclined section (4121) on which the first-first side (742-1) and the first-second side (742-2) of the second protrusion (712) of the second fixing member (702) are arranged. The second inclined section (4121) may be formed in a shape corresponding to the first-first side (742-1) and the first-second side (742-2) of the second fixing member (702).

[0206] In one embodiment, referring to FIG. 4b, the first plate (400) may include a plurality of rotational grooves (420) between the first plate (400) and the first portion (520) of the gear (500).

[0207] In one embodiment, referring to FIG. 4b, the plurality of rotational grooves (420) may be positioned on the same plane as the first settling groove (410).

[0208] In one embodiment, referring to FIG. 4b, the plurality of rotation grooves (420) may include a pair of first rotation grooves (421) and a pair of second rotation grooves (422). The pair of first rotation grooves (421) may be arranged diagonally about the rotation axis of the first plate (400) (e.g., the y-axis in FIG. 3b). The pair of second rotation grooves (422) may be arranged diagonally about the rotation axis of the first plate (400) (e.g., the y-axis in FIG. 3b).

[0209] In one embodiment, referring to FIG. 4b, the first rotation groove (421) and the second rotation groove (422) may be arranged to face each other with respect to the x-axis of FIG. 4b.

[0210] In one embodiment, when the first plate (400) rotates about the rotation axis (e.g., the y-axis in FIG. 4B) by the interval (A1, A2) of the rotation grooves (420), the first side (740) of the protrusion (710) of the fixed member (700) can move along the inclined section (4101).

[0211] In one embodiment, referring to FIG. 4b, when a user rotates the wheel (300) in a first direction (S1) around a rotation axis (e.g., the y-axis in FIG. 2b), the first plate (400) can rotate around the rotation axis (e.g., the y-axis in FIG. 4b) by a first rotation groove (421) spacing (A1) (e.g., 4 degrees in the first direction (S1) with respect to the y-axis in FIG. 2a). While the first plate (400) rotates about the rotation axis (e.g., the y-axis in FIG. 4B) by the interval (A1) of the first rotation groove (421), the first-first side surface (741-1) of the first protrusion (711) of the first fixing member (701) can move along the first inclined section (4111) of the first-first mounting groove (411), and the first-first side surface (742-1) of the second protrusion (712) of the second fixing member (702) can move along the second inclined section (4121) of the first-second mounting groove (412).

[0212] In one embodiment, referring to FIG. 4b, when a user rotates the wheel (300) in a second direction (S2) about a rotation axis (e.g., the y-axis in FIG. 2b), the first plate (400) can rotate about the rotation axis (e.g., the y-axis in FIG. 4b) by a second rotation groove (422) spacing (A2) (e.g., 4 degrees in the second direction (S2) about the y-axis in FIG. 2a). While the first plate (400) rotates about the rotation axis (e.g., the y-axis in FIG. 4B) by the interval (A2) of the second rotation groove (422), the first-second side surface (741-2) of the first protrusion (711) of the first fixing member (701) can move along the first inclined section (4111) of the first-first fixing groove (411), and the first-second side surface (742-2) of the second protrusion (712) of the second fixing member (702) can move along the second inclined section (4121) of the first-second fixing groove (412).

[0213] In one embodiment, referring to FIGS. 3A, 3B, and 4B, the first plate (400) may include at least one first guide (430).

[0214] In one embodiment, referring to FIGS. 3a, 3b, and 4b, the first fixing member (701) and the second fixing member (702) can move linearly along the first guide (430) on the second surface (400b) of the first plate (400) (e.g., the surface facing the -y axis in FIG. 3a).

[0215] In one embodiment, when the first-first side (740-1) and the first-second side (740-2) of the protrusion (710) of the fixing member (700) move along the inclined section (4101) of the first fixing groove (410), the spring (730) connecting the first fixing member (701) and the second fixing member (702) (e.g., the spring (730) of FIG. 2A) can be compressed.

[0216] In one embodiment, referring to FIGS. 2A, 3A, 3B, and 4B, when the first-first side (741-1) and the first-second side (741-2) of the first protrusion (711) of the first fixing member (701) move along the first inclined section (4111) of the first-first mounting groove (411), and the first-first side (742-1) and the first-second side (742-2) of the second protrusion (712) of the second fixing member (702) move along the second inclined section (4121) of the first-second mounting groove (412), the spring (730) connecting the first fixing member (701) and the second fixing member (702) (e.g., the spring (730) of FIG. 2A) may be compressed.

[0217] In one embodiment, referring to FIGS. 2A, 3A, 3B, and 4B, when the spring (730) (e.g., the spring (730) of FIG. 2A) is compressed, the first fixing member (701) can move in the +x-axis direction of FIG. 4B along the first guide (430). When the spring (730) (e.g., the spring (730) of FIG. 2A) is compressed, the second fixing member (702) can move in the -x-axis direction of FIG. 4B along the first guide (430).

[0218] In one embodiment, when the spring (730) connecting the first fixing member (701) and the second fixing member (702) (e.g., the spring (730) of FIG. 2A) is compressed, the protrusion (710) of the fixing member (700) may be detached from the first fixing groove (410) or may be disposed in whole or in part in at least a portion of the first fixing groove (410).

[0219] In one embodiment, referring to FIGS. 3A, 3B, and 4B, when the spring (730) (e.g., the spring (730) of FIG. 2A) connecting the first fixing member (701) and the second fixing member (702) is compressed, the first protrusion (711) of the first fixing member (701) may be detached from the first-first mounting groove (411) or may be all or partly disposed in at least a portion of the first-first mounting groove (411), and the second protrusion (712) of the second fixing member (702) may be all or partly disposed in at least a portion of the first-second mounting groove (412) or may be detached from the first-second mounting groove (412).

[0220] In one embodiment, when the protrusion (710) of the fixed member (700) is positioned in at least a portion of the first mounting groove (410) or is detached from the first mounting groove (410), the first portion (520) may be positioned in a pair of rotational grooves (420).

[0221] In one embodiment, referring to FIGS. 3A, 3B, and 4B, when the first plate (400) is rotated in the first direction (S1) about the rotational axis (e.g., the y-axis of FIG. 2B) by a first rotational groove (421) spacing (A1) (e.g., 4 degrees in the first direction (S1) with respect to the y-axis of FIG. 2A), the first-first side surface (741-1) of the first protrusion (711) of the first fixing member (701) can be positioned in at least a portion of the first-first mounting groove (411) or detached from the first-first mounting groove (411). When the first plate (400) is rotated in the first direction (S1) by the first rotation groove (421) spacing (A1) (e.g., 4 degrees in the first direction (S1) with respect to the y-axis of FIG. 2a) around the rotation axis (e.g., the y-axis of FIG. 2b), the first-first side surface (742-1) of the second protrusion (712) of the second fixing member (702) may be arranged in at least a portion of the first-second fixing groove (412) or may be detachably attached to or detached from the first-second fixing groove (412). In this case, at least a portion of the first portion (520) of the gear (500) may be arranged in a pair of first rotation grooves (421) and may be rotated around the rotation axis (e.g., the y-axis of FIG. 4a). In one embodiment, when the first side (740-1) of the protrusion (710) of the fixed member (700) is positioned on at least a portion of the first fixing groove (410) so that the first part (520) of the gear (500) rotates, the user's operational feel of the wheel (300) can be increased.

[0222] In one embodiment, referring to FIGS. 3A, 3B, and 4B, when the first plate (400) is rotated in the second direction (S2) about the rotational axis (e.g., the y-axis in FIG. 2B) by the second rotational groove (422) spacing (A2), the first-second side surface (741-2) of the first protrusion (711) of the first fixing member (701) can be positioned in at least a portion of the first-first mounting groove (411) or detached from the first-first mounting groove (411). When the first plate (400) is rotated in the second direction (S2) about the rotation axis (e.g., the y-axis in FIG. 2b) by the spacing (A2) of the second rotation grooves (422), the first-second side surface (742-2) of the second protrusion (712) of the second fixing member (702) may be arranged in at least a portion of the first-second mounting groove (412) or may be detached from the first-second mounting groove (412). In this case, at least a portion of the first portion (520) of the gear (500) may be arranged in a pair of second rotation grooves (422) and rotated about the rotation axis (e.g., the y-axis in FIG. 4a). In one embodiment, when the first-second side (740-2) of the protrusion (710) of the fixed member (700) is positioned on at least a portion of the first fixing groove (410) so that the first part (520) of the gear (500) rotates, the user's operational feel of the wheel (300) can be increased.

[0223] In one embodiment, referring to FIGS. 2A, 3A, 3B, and 4B, when the first part (520) of the gear (500) is positioned in a pair of first rotational grooves (421) or second rotational grooves (422), the first part (520) of the gear (500) can rotate by an angle equal to the rotational angles of the wheel (300) and the first plate (400).

[0224] FIG. 5A is a front view of the length adjustment device (1100) according to one embodiment of the present disclosure, in which the gear (500), the fixing member (700), and the second plate (600) are assembled. FIG. 5B is a cross-sectional view taken along the line 5B-5B illustrated in FIG. 5A. FIG. 5C is a plan view of FIG. 5A.

[0225] In one embodiment, referring to FIGS. 5A, 5B, and 5C, the second plate (600) may include a first side (600a) (e.g., the side facing the +y-axis in FIG. 5A) and a second side (600b) opposite the first side (e.g., the side facing the -y-axis in FIG. 5A).

[0226] In one embodiment, a second face (700b) (e.g., a face facing the -y axis in FIG. 5a) of a protrusion (710) of a fixing member (700) may be placed on a first face (600a) (e.g., a face facing the +y axis in FIG. 5a) of a second plate (600).

[0227] In one embodiment, a first surface (700a) of a protrusion (710) of a fixing member (700) (e.g., a surface facing the +y axis in FIG. 2a) may be disposed in a first mounting groove (410) of a first plate (400), and a second surface (700b) of a protrusion (710) of a fixing member (700) (e.g., a surface facing the -y axis in FIG. 2a) may be disposed in a second mounting groove (610) of a second plate (600).

[0228] In one embodiment, referring to FIGS. 5A, 5B, and 5C, a second surface (701b) (e.g., a surface facing the -y axis in FIG. 5A) of a first protrusion (711) of a first fixing member (701) and a second surface (702b) (e.g., a surface facing the -y axis in FIG. 5A) of a second fixing member (702) may be disposed on a first surface (600a) of a second plate (600) (e.g., a surface facing the +y axis in FIG. 5A).

[0229] In one embodiment, a second face (700b) (e.g., a face facing the -y axis in FIG. 5a) of a body (720) of a fixed member (700) may be disposed on a first face (500a) (e.g., a face facing the +y axis in FIG. 5a) of a first portion (520) of a gear (500).

[0230] In one embodiment, referring to FIGS. 5A, 5B, and 5C, a first surface (500a) of a first portion (520) of a gear (500) (e.g., a surface facing the +y-axis in FIG. 5A) may be disposed on a second surface (701b) of a body (721) of a first fixing member (701) (e.g., a surface facing the -y-axis in FIG. 5A) and a second surface (702b) of a body (722) of a second fixing member (702) (e.g., a surface facing the -y-axis in FIG. 5A) may be disposed on a first surface (500a) of a first portion (520) of a gear (500).

[0231] In one embodiment, referring to FIGS. 5A, 5B, and 5C, the second plate (600) may include a plurality of second mounting grooves (610) (e.g., second grooves, second recesses, second holes, first partial grooves, first partial walls) in which protrusions (710) of the fixing member (700) are disposed.

[0232] In one embodiment, referring to FIGS. 5A, 5B, and 5C, a plurality of second anchoring grooves (610) may be formed by recessing a first surface (600a) of a second plate (600) (e.g., a surface facing the +y-axis of FIG. 5A) in the -y-axis direction of FIG. 5A.

[0233] In one embodiment, referring to FIGS. 5A, 5B, and 5C, a plurality of second mounting grooves (610) may be formed along the circumference of the second plate (600). Each of the plurality of second mounting grooves (610) may be formed in the same shape.

[0234] In one embodiment, each of the plurality of second anchoring grooves (610) may be formed to correspond to the third-first side (760-1), the third-second side (760-2), and the fourth side (770) of the fixing member (700).

[0235] In one embodiment, referring to FIGS. 5A, 5B, and 5C, each of the plurality of second fixing grooves (610) may be formed to correspond to the third-first side (761-1), the third-second side (761-2), and the fourth side (771) of the first fixing member (701).

[0236] In one embodiment, referring to FIGS. 5A, 5B, and 5C, the second anchoring groove (610) may include a first section (6101), a second section (6102), and a third section (6103).

[0237] In one embodiment, referring to FIGS. 5A, 5B, and 5C, the first section (6101) and the third section (6103) may be formed in a planar shape. The second section (6102) may be formed in a curved shape.

[0238] In one embodiment, referring to FIGS. 5A, 5B, and 5C, the first section (6101) may extend from the third section (6103). The second section (6102) may extend from the first section (6101).

[0239] In one embodiment, the third-first side (760-1) and the third-second side (760-2) of the protrusion (710) of the fixing member (700) may be disposed in the first section (6101). The fourth side (770) of the protrusion (710) of the fixing member (700) may be disposed in the third section (6103).

[0240] In one embodiment, referring to FIGS. 5A, 5B, and 5C, the third-first side (761-1) and the third-second side (761-2) of the first protrusion (711) of the first fixing member (701) may be disposed in the first section (6101). The fourth side (771) of the first protrusion (711) of the first fixing member (701) may be disposed in the third section (6103).

[0241] In one embodiment, the first section (6101) may be formed in a shape corresponding to the third-first side (760-1) and the third-second side (760-2) of the protrusion (710) of the fixing member (700). The third section (6103) may be formed in a shape corresponding to the fourth side (770) of the protrusion (710) of the fixing member (700).

[0242] In one embodiment, referring to FIGS. 5A, 5B, and 5C, the first section (6101) may be formed in a shape corresponding to the third-first side (761-1) and the third-second side (761-2) of the first protrusion (711) of the first fixing member (701). The third section (6103) may be formed in a shape corresponding to the fourth side (771) of the first protrusion (711) of the first fixing member (701).

[0243] In one embodiment, a body (720) of a fixed member (700) may be placed on a first surface (500a) of a first portion (520) of a gear (500) (e.g., a surface facing the +y axis in FIG. 5b).

[0244] In one embodiment, referring to FIG. 5b, a body (721) of a first fixing member (701) and a body (722) of a second fixing member (702) may be disposed on a first surface (500a) of a first portion (520) of a gear (500) (e.g., a surface facing the +y axis in FIG. 5b).

[0245] In one embodiment, referring to FIGS. 4B, 5A, 5B, and 5C, when a user rotates the wheel (300) in a first direction (S1) about a rotation axis (e.g., the y-axis in FIG. 4B), the first plate (400) can rotate about the rotation axis (e.g., the y-axis in FIG. 4B) by a first rotation groove (421) spacing (A1) (e.g., 4 degrees in the first direction (S1) with respect to the y-axis in FIG. 2A). While the first plate (400) rotates about the rotation axis (e.g., the y-axis in FIG. 4B) by the interval (A1) of the first rotation groove (421), the first-first side (741-1) of the first protrusion (711) of the first fixing member (701) can move along the first inclined section (4111) of the first-first fixing groove (411) of the first plate (400), and the third-first side (761-1) can move along the first section (6101) of the second plate (600). While the first plate (400) rotates about the rotation axis (e.g., the y-axis in FIG. 4B) by the distance (A1) of the first rotation groove (421), the first-first side (742-1) of the second protrusion (712) of the second fixing member (702) can move along the second inclined section (4121) of the first-second fixing groove (412) of the first plate (400), and the third-first side (762-1) can move along the first section (6101) of the second plate (600).

[0246] In one embodiment, referring to FIGS. 4B, 5A, 5B, and 5C, when a user rotates the wheel (300) in a second direction (S2) around a rotation axis (e.g., the y-axis in FIG. 4B), the first plate (400) can rotate around the rotation axis (e.g., the y-axis in FIG. 4B) by a second rotation groove (422) spacing (A2) (e.g., 4 degrees in the second direction (S2) based on the y-axis in FIG. 2A). While the first plate (400) rotates around the rotation axis (e.g., the y-axis in FIG. 4B) by a second rotation groove (422) spacing (A2), the first-second side surface (741-2) of the first protrusion (711) of the first fixing member (701) is aligned along the first inclined section (4111) of the first-first mounting groove (411) of the first plate (400). Moving, the 3-2 side (761-2) can move along the first section (6101) of the second plate (600). While the first plate (400) rotates about the rotation axis (e.g., the y-axis in FIG. 4B) by the interval (A2) of the second rotation groove (422), the 1-2 side (742-2) of the second protrusion (712) of the second fixing member (702) moves along the second inclined section (4121) of the 1-2 mounting groove (412) of the first plate (400), and the 3-2 side (762-2) can move along the first section (6101) of the second plate (600).

[0247] In one embodiment, referring to FIGS. 5b and 5c, the first portion (520) may include at least one second guide (540).

[0248] In one embodiment, referring to FIGS. 5a, 5b, and 5c, the first fixing member (701) and the second fixing member (702) can move linearly along the second guide (540) on the first surface (500a) of the first portion (520) of the gear (500) (e.g., the surface facing the +y axis in FIG. 5a).

[0249] In one embodiment, referring to FIGS. 5b and 5c, and FIGS. 6a and 6b described below, the second portion (530) of the gear (500) may be placed in the internal space (600c) of the second plate (600).

[0250] In one embodiment, when the third-first side (760-1) and the third-second side (760-2) of the protrusion (710) of the fixing member (700) move along the first section (6101) to the second section (6102), the spring (730) connecting the first fixing member (701) and the second fixing member (702) (e.g., the spring (730) of FIG. 2A) may be compressed.

[0251] In one embodiment, referring to FIGS. 2A, 5A, 5B, and 5C, when the third-first side (761-1) and the third-second side (761-2) of the first protrusion (711) of the first fixing member (701) move along the first section (6101) to the second section (6102), and the third-first side (762-1) and the third-second side (762-2) of the second protrusion (712) of the second fixing member (702) move along the first section (6101) to the second section (6102), the spring (730) connecting the first fixing member (701) and the second fixing member (702) (e.g., the spring (730) of FIG. 2A) may be compressed.

[0252] In one embodiment, referring to FIGS. 2A, 5A, 5B, and 5C, when the spring (730) (e.g., the spring (730) of FIG. 2A) is compressed, the first fixing member (701) can move in the +x-axis direction of FIG. 5C along the second guide (540). When the spring (730) (e.g., the spring (730) of FIG. 2A) is compressed, the second fixing member (702) can move in the -x-axis direction of FIG. 5C along the second guide (540).

[0253] In one embodiment, when the first plate (400) rotates by the interval (A1, A2) of the rotational groove (420) around the rotational axis (e.g., the y-axis of FIG. 2A) of the first plate (400), the first-first side (740-1) and the first-second side (740-2) of the protrusion (710) of the fixed member (700) can move along the inclined section (4111, 4121) of the first mounting groove (410) of the first plate (400), and the third-first side (760-1) and the third-second side (760-2) can move to the second section (6102) of the second plate (600).

[0254] In one embodiment, when the third-first side (760-1) and the third-second side (760-2) of the protrusion (710) of the fixing member (700) move along the first section (6101) to the second section (6102), the spring (730) connecting the first fixing member (701) and the second fixing member (702) can be compressed.

[0255] In one embodiment, when the spring (730) connecting the first fixing member (701) and the second fixing member (702) is compressed, the protrusion (710) of the fixing member (700) can be separated from the second fixing groove (610).

[0256] In one embodiment, when the protrusion (710) of the fixed member (700) is disengaged from the second fixing groove (610), the first part (520) of the gear (500) can rotate about the rotational axis of the first part (520) (e.g., the y-axis in FIG. 2A).

[0257] In one embodiment, referring to FIGS. 5A, 5B, and 5C, when the spring (730) connecting the first fixing member (701) and the second fixing member (702) is compressed, the first protrusion (711) of the first fixing member (701) and the second protrusion (712) of the second fixing member (702) can be positioned in at least a portion of the second fixing groove (610) or detached from the second fixing groove (610).

[0258] In one embodiment, referring to FIGS. 5A, 5B, and 5C, when the first protrusion (711) of the first fixing member (701) and the second protrusion (712) of the second fixing member (702) are positioned in at least a portion of the second fixing groove (610) or are detached from the second fixing groove (610), the first portion (520) of the gear (500) can rotate about the rotational axis of the first portion (520) (e.g., the y-axis in FIG. 5A).

[0259] In one embodiment, when a first surface (700a) of a protrusion (710) of a fixed member (700) (e.g., a surface facing the +y-axis in FIG. 2A) is disposed on at least a portion of a first mounting groove (410) of a first plate (400), and a second surface (700b) of a protrusion (710) of a fixed member (700) (e.g., a surface facing the -y-axis in FIG. 2A) is disposed on at least a portion of a second mounting groove (610) of a second plate (600), a first portion (520) of a gear (500) is disposed on a pair of rotational grooves (420) of the first plate (400), so that the first portion (520) of the gear (500) can rotate about a rotational axis (e.g., a y-axis in FIG. 5A) of the first portion (520).

[0260] In one embodiment, when a first surface (700a) of a protrusion (710) of a fixed member (700) (e.g., a surface facing the +y-axis in FIG. 2A) is detached from a first mounting groove (410) of a first plate (400) and a second surface (700b) of a protrusion (710) of a fixed member (700) (e.g., a surface facing the -y-axis in FIG. 2A) is detached from a second mounting groove (610) of a second plate (600), a first portion (520) of a gear (500) is disposed in a pair of rotational grooves (420) of the first plate (400) so that the first portion (520) of the gear (500) can rotate about a rotational axis (e.g., a y-axis in FIG. 5A) of the first portion (520).

[0261] In one embodiment, referring to FIGS. 3A, 3B, 4B, 5A, 5B, and 5C, when the first plate (400) is rotated in the first direction (S1) about the rotation axis (e.g., the y-axis in FIG. 5C) by a first rotation groove (421) spacing (A1) (e.g., 4 degrees in the first direction (S1) with respect to the y-axis in FIG. 5C), the first-first side (741-1) of the first protrusion (711) of the first fixing member (701) is disposed on at least a portion of the first-first mounting groove (411) of the first plate (400), and the third-first side (761-1) can move to the second section (6102) of the second plate (600). When the first plate (400) is rotated in the first direction (S1) by the first rotation groove (421) spacing (A1) (e.g., 4 degrees in the first direction (S1) with respect to the y-axis of FIG. 5c) around the rotation axis (e.g., y-axis of FIG. 5c), the first-first side surface (742-1) of the second protrusion (712) of the second fixing member (702) is arranged in at least a part of the first-second fixing groove (412), and the third-first side surface (762-1) can move to the second section (6102) of the second plate (600). In this case, the first portion (520) of the gear (500) can rotate in the first direction (S1) by an angle equal to the rotation angles of the wheel (300) and the first plate (400). In one embodiment, when the first-first side (740-1) of the protrusion (710) of the fixed member (700) is disposed in at least a part of the first mounting groove (410) of the first plate (400) and the third-first side (760-1) is disposed in at least a part of the second mounting groove (610) of the second plate (600) so that the first part (520) of the gear (500) rotates, the user's operational feel of the wheel (300) can be increased.

[0262] In one embodiment, referring to FIGS. 3A, 3B, 4B, 5A, 5B, and 5C, when the first plate (400) is rotated in the second direction (S2) about the rotation axis (e.g., the y-axis in FIG. 5C) by a second rotation groove (422) spacing (A2) (e.g., 4 degrees in the second direction (S2) about the y-axis in FIG. 5C), the first-second side surface (741-2) of the first protrusion (711) of the first fixing member (701) is disposed on at least a portion of the first-first mounting groove (411) of the first plate (400), and the third-second side surface (761-2) can move to the second section (6102) of the second plate (600). When the first plate (400) is rotated in the second direction (S2) by the second rotation groove (422) spacing (A2) (e.g., 4 degrees in the second direction (S2) with respect to the y-axis of FIG. 5c) around the rotation axis (e.g., y-axis of FIG. 5c), the first-second side surface (742-2) of the second protrusion (712) of the second fixing member (702) is arranged in at least a part of the first-second mounting groove (412), and the third-second side surface (762-2) can move to the second section (6102) of the second plate (600). In this case, the first portion (520) of the gear (500) can rotate in the second direction (S2) by an angle equal to the rotation angles of the wheel (300) and the first plate (400). In one embodiment, when the first-second side (740-2) of the protrusion (710) of the fixed member (700) is disposed in at least a part of the first mounting groove (410) of the first plate (400) and the third-second side (760-2) is disposed in at least a part of the second mounting groove (610) of the second plate (600) so that the first part (520) of the gear (500) rotates, the user's operational feel of the wheel (300) can be increased.

[0263] In one embodiment, referring to FIGS. 3A, 3B, 4B, 5A, 5B, and 5C, when the first plate (400) is rotated in the first direction (S1) about the rotation axis (e.g., the y-axis in FIG. 5C) by a first rotation groove (421) spacing (A1) (e.g., 4 degrees in the first direction (S1) about the y-axis in FIG. 5C), the first-first side (741-1) of the first protrusion (711) of the first fixing member (701) can be detached from the first-first mounting groove (411) of the first plate (400), and the third-first side (761-1) can be disposed in the second section (6102) of the second plate (600). When the first plate (400) is rotated in the first direction (S1) by the first rotation groove (421) spacing (A1) (e.g., 4 degrees in the first direction (S1) with respect to the y-axis of FIG. 5c) around the rotation axis (e.g., y-axis of FIG. 5c), the first-first side surface (742-1) of the second protrusion (712) of the second fixing member (702) can be detached from the first-second mounting groove (412), and the third-first side surface (762-1) can be placed in the second section (6102) of the second plate (600). In this case, the first portion (520) of the gear (500) can be rotated in the first direction (S1) by an angle equal to the rotation angles of the wheel (300) and the first plate (400).

[0264] In one embodiment, referring to FIGS. 3A, 3B, 4B, 5A, 5B, and 5C, when the first plate (400) is rotated in the second direction (S2) about the rotation axis (e.g., the y-axis in FIG. 5C) by a spacing A2 of the second rotation groove (422) (e.g., 4 degrees in the second direction (S2) about the y-axis in FIG. 5C), the first-second side surface (741-2) of the first protrusion (711) of the first fixing member (701) can be detached from the first-first mounting groove (411) of the first plate (400), and the third-second side surface (761-2) can be disposed in the second section (6102) of the second plate (600). When the first plate (400) is rotated in the second direction (S2) by the second rotation groove (422) spacing (A2) (e.g., 4 degrees in the second direction (S2) with respect to the y-axis of FIG. 5c) around the rotation axis (e.g., y-axis of FIG. 5c), the first-second side surface (742-2) of the second protrusion (712) of the second fixing member (702) can be detached from the first-second mounting groove (412), and the third-second side surface (762-2) can be placed in the second section (6102) of the second plate (600). In this case, the first portion (520) of the gear (500) can be rotated in the second direction (S2) by an angle equal to the rotation angles of the wheel (300) and the first plate (400).

[0265] In one embodiment, when the first part (520) of the gear (500) rotates around a rotational axis (e.g., the y-axis in FIG. 2A), the second part (530) extending from the first part (520) can rotate. The teeth (510) formed on the second part (530) can engage with the teeth structure (1010) of the second housing (1000) through the internal space (600c) of the open second plate (600), so that the length of the second housing (1000) can be adjusted.

[0266] In one embodiment, when the wheel (300) rotates in a first direction (S1) about the rotational axis of the wheel (300) (e.g., the y-axis in FIG. 2A), the length of the second housing (1000) can be adjusted in an increasing direction.

[0267] In one embodiment, when the wheel (300) rotates in the second direction (S2) about the rotational axis of the wheel (300) (e.g., the y-axis in FIG. 2A), the length of the second housing (1000) can be adjusted in a decreasing direction.

[0268] In one embodiment, when the first portion (520) rotates about a rotational axis (e.g., the y-axis in FIG. 2A), the angle of the second housing (1000) can be adjusted.

[0269] In one embodiment, when the wheel (300) rotates in a first direction (S1) about the rotational axis of the wheel (300) (e.g., the y-axis in FIG. 2A), the angle of the second housing (1000) can be adjusted in an increasing direction.

[0270] In one embodiment, when the wheel (300) rotates in the second direction (S2) about the rotational axis of the wheel (300) (e.g., the y-axis in FIG. 2A), the angle of the second housing (1000) can be adjusted in a decreasing direction.

[0271] In one embodiment, when the user stops operating the wheel (300), the spring (730) connecting the first fixing member (701) and the second fixing member (702) can be restored to its pre-compression length.

[0272] In one embodiment, when the spring (730) is restored to its pre-compressed length, the protrusion (710) of the fixing member (700) may be positioned in the first anchoring groove (410).

[0273] In one embodiment, when the spring (730) is restored to its pre-compressed length, the protrusion (710) of the fixing member (700) may be positioned in the second anchoring groove (610).

[0274] In one embodiment, when the protrusion (710) of the fixed member (700) is positioned in the first fixing groove (410), the first part (520) can be separated from the pair of rotation grooves (420).

[0275] In one embodiment, when the protrusion (710) of the fixed member (700) is positioned in the second fixing groove (610), the rotation of the first part (520) can be stopped.

[0276] In one embodiment, when the rotation of the first portion (520) is stopped, the length adjustment of the second housing (1000) may be stopped.

[0277] In one embodiment, when a user applies force to the second housing (1000), the protrusion (710) of the fixing member (700) can be fixed to the first fixing groove (410) and the second fixing groove (610).

[0278] In one embodiment, the spring (730) connecting the first fixing member (701) and the second fixing member (702) can maintain its length before compression due to the protrusion (710) of the fixing member (700) fixed to the first fixing groove (410) and the second fixing groove (610).

[0279] In one embodiment, when a user applies force to the second housing (1000), the user may pull or push the second housing (100).

[0280] In one embodiment, when a user applies force to the second housing (1000), the protrusion (710) of the fixing member (700) can remain positioned in the first fixing groove (410).

[0281] In one embodiment, when a user applies force to the second housing (1000), the protrusion (710) of the fixing member (700) can remain positioned in the second fixing groove (610).

[0282] In one embodiment, when the protrusion (710) of the fixing member (700) is positioned in the first fixing groove (410) and the second fixing groove (610), the first part (520) can be fixed.

[0283] In one embodiment, when the first portion (520) is fixed, the length of the second housing (1000) can be fixed.

[0284] In one embodiment, when the first side (740) of the protrusion (710) of the fixed member (700) moves out of the inclined section (4101) as the user rotates the wheel (300) around the rotational axis of the wheel (300) (e.g., the y-axis in FIG. 2A), the user's operational feel of the wheel (300) may be reduced.

[0285] In one embodiment, when the third side (760) of the protrusion (710) of the fixed member (700) moves out of the second section (6102) as the user rotates the wheel (300) around the rotational axis of the wheel (300) (e.g., the y-axis in FIG. 2A), the user's operational feel of the wheel (300) may be reduced.

[0286] In one embodiment, when a user stops operating the wheel (300) (e.g., wheel (300) of FIG. 2A) such that the spring (730) connecting the first fixing member (701) and the second fixing member (702) returns to its pre-compression length, the speed at which the spring (730) returns to its pre-compression length may be fast.

[0287] In one embodiment, if the speed at which the spring (730) returns to its pre-compression length is fast, noise may occur when the spring (730) returns to its pre-compression length and the protrusion (710) of the fixing member (700) is placed in the first anchoring groove (410).

[0288] In one embodiment, if the speed at which the spring (730) returns to its pre-compression length is fast, noise may occur when the spring (730) returns to its pre-compression length and the protrusion (710) of the fixing member (700) is placed in the second fixing groove (610).

[0289] FIG. 6a is a drawing illustrating the assembly of a gear (500), a rubber ring (800), and a second plate (600) of a length adjusting device (1100) according to one embodiment of the present disclosure. FIG. 6b is a plan view of FIG. 6a.

[0290] In one embodiment, referring to FIGS. 2A and 6A, at least one rubber ring (800) (e.g., an o-ring, a first elastic member) may be placed between the gear (500) and the second plate (600).

[0291] In one embodiment, referring to FIGS. 2A and 6A, at least one rubber ring (800) may be placed between the second portion (530) and the second plate (600).

[0292] In one embodiment, the rubber ring (800) can reduce the speed at which the third side (760) of the protrusion (710) of the fixed member (700) moves along the first section (6101) of the second plate (600) to the second section (6102) when the first plate (400) (e.g., the first plate (400) of FIG. 2A) rotates about the rotational axis of the first plate (400) (e.g., the y-axis of FIG. 2A).

[0293] In one embodiment, when the speed at which the third side (760) of the protrusion (710) of the fixing member (700) moves along the first section (6101) to the second section (6102) is reduced, the speed at which the spring (730) connecting the first fixing member (701) and the second fixing member (702) is compressed may be reduced.

[0294] In one embodiment, when the speed at which the spring (730) connecting the first fixing member (701) and the second fixing member (702) is compressed decreases, the speed at which the protrusion (710) of the fixing member (700) is detached from the second fixing groove (610) may decrease.

[0295] In one embodiment, when the speed at which the protrusion (710) of the fixed member (700) is detached from the second fixing groove (610) is reduced, the speed at which the first part (520) rotates around the rotational axis of the first part (520) (e.g., the y-axis in FIG. 2A) may be reduced.

[0296] In one embodiment, the rubber ring (800) can reduce noise generated when a user operates the wheel (300) (e.g., wheel (300) of FIG. 2A).

[0297] In one embodiment, the rubber ring (800) can reduce noise generated when the spring (730) is restored to its pre-compressed length and the protrusion (710) of the fixing member (700) is placed in the first fixing groove (410).

[0298] In one embodiment, the rubber ring (800) can reduce noise generated when the spring (730) is restored to its pre-compressed length and the protrusion (710) of the fixing member (700) is placed in the second fixing groove (610).

[0299] In one embodiment, the rubber ring (800) can reduce noise generated when the first part (520) rotates while slowly stopping the rotation of the first part (520) when the user stops operating the wheel (300) (e.g., wheel (300) of FIG. 2A).

[0300] In one embodiment, referring to FIGS. 2A to 5C, when a user rotates the wheel (300) around the rotational axis of the wheel (300) (e.g., the y-axis in FIG. 2A), and the first side (740) of the protrusion (710) of the fixed member (700) is positioned in the inclined section (4101) and moves, the protrusion (710) of the fixed member (700) may be positioned in at least a part of the first seating groove (410) of the first plate (400) in response to the user's manipulation of the wheel (300).

[0301] In one embodiment, referring to FIGS. 2A to 5C, when a user rotates the wheel (300) around the rotational axis of the wheel (300) (e.g., the y-axis in FIG. 2A), and the third side (760) of the protrusion (710) of the fixed member (700) is positioned and moves in a second section (6102) outside the first section (6101), the protrusion (710) of the fixed member (700) may be positioned in at least a portion of the second seating groove (610) of the second plate (600) in response to the user's manipulation of the wheel (300).

[0302] In one embodiment, when a user rotates the wheel (300) about the rotational axis of the wheel (300) (e.g., the y-axis in FIG. 2A) while the protrusion (710) of the fixed member (700) is positioned in at least a portion of the first mounting groove (410) of the first plate (400), the protrusion (710) of the fixed member (700) may be positioned in at least a portion of the second mounting groove (610) of the second plate (600).

[0303] In one embodiment, a plurality of second mounting grooves (610) of the second plate (600) may correspond to a plurality of gear grooves (not shown) of the gear (500).

[0304] In one embodiment, when a user rotates the wheel (300) around the rotation axis of the wheel (300) (e.g., the y-axis in FIG. 2A) while the protrusion (710) of the fixed member (700) is positioned on at least a portion of the second mounting groove (610) of the second plate (600), a feeling of operating the wheel (300) can be formed for the user in response to the rotation around the rotation axis of the first part (520) (e.g., the y-axis in FIG. 2A).

[0305] In the following description, descriptions of configurations identical to or similar to the configuration described above are omitted, and replaced with descriptions of FIGS. 2a to 6b.

[0306] Fig. 7 is a front view of a length adjustment device according to one embodiment of the present disclosure, wherein the wheel and the first housing are assembled. Fig. 8a is an enlarged front view of a length adjustment device according to one embodiment of the present disclosure, wherein the wheel, the elastic member, and the first housing are assembled. Fig. 8b is a cross-sectional view taken along the line 8b-8b illustrated in Fig. 8a. Fig. 9a is an enlarged plan view of the first housing of Fig. 8a. Fig. 9b is an enlarged bottom view of the wheel of Fig. 8a.

[0307] In one embodiment, referring to FIGS. 7 through 9b, the length adjustment device (1100) may include a first housing (900) in which a wheel (300) is disposed.

[0308] In one embodiment, referring to FIGS. 8a and 8b, the wheel (300) may include a first surface (300a) and a second surface (300b) opposite the first surface (300a).

[0309] In one embodiment, the wheel (300) may include an elastic member (310) (e.g., a second elastic member). In one embodiment, the elastic member (310) may be disposed on a second side (300b) of the wheel (300).

[0310] In one embodiment, referring to FIGS. 8A to 9B, an elastic member (310) may be positioned between the wheel (300) and the first housing (900).

[0311] In one embodiment, the elastic member (310) may be positioned between the circumference of the first housing (900) and the circumference of the wheel (300).

[0312] In one embodiment, the elastic member (310) may be formed of an elastic material (e.g., rubber, silicone, or polyurethane).

[0313] In one embodiment, referring to FIG. 9A, the first housing (900) may include a protruding structure (940).

[0314] In one embodiment, a second face (300b) of a wheel (300) may be disposed on a protruding structure (940).

[0315] In one embodiment, the elastic member (310) may be positioned between the protruding structure (940) of the first housing (900) and the circumference of the wheel (300).

[0316] In one embodiment, the protruding structure (940) may include a plurality of third mounting grooves (910) (e.g., third groove, third recess, third hole, second partial groove, second partial wall) along the circumference of the first housing (900).

[0317] In one embodiment, the number of the plurality of third anchoring grooves (910) may correspond to the number of the plurality of second anchoring grooves (610) of the second plate (600) (e.g., the second plate (600) of FIG. 2A).

[0318] In one embodiment, a plurality of second mounting grooves (610) of the second plate (600) may correspond to a plurality of gear grooves (not shown) of the gear (500).

[0319] In one embodiment, the elastic member (310) may be in at least partial contact with the third anchoring groove (910).

[0320] In one embodiment, the elastic member (310) may include at least one elastic protrusion (3101) protruding in the direction of the rotational axis of the wheel (300) (e.g., the y-axis of FIG. 2A).

[0321] In one embodiment, the elastic protrusion (3101) may be formed in a shape corresponding to the third anchoring groove (910).

[0322] In one embodiment, the elastic protrusion (3101) may be in contact with the third anchoring groove (910).

[0323] In one embodiment, when a user rotates the wheel (300) around the rotation axis of the wheel (300) (e.g., the y-axis in FIG. 2A) while the elastic protrusion (3101) is positioned in the third mounting groove (910), the user can feel the operation of the wheel (300) corresponding to the rotation around the rotation axis of the first part (520) (e.g., the y-axis in FIG. 2A).

[0324] In the following description, descriptions of configurations identical to or similar to the configuration described above are omitted, and replaced with descriptions of FIGS. 2a to 6b.

[0325] FIG. 10 is an enlarged front view of the wheel, ball, and first housing of the length adjustment device assembled according to one embodiment of the present disclosure. FIG. 11a is an enlarged plan view of the first housing of FIG. 10. FIG. 11b is an enlarged bottom view of the wheel of FIG. 10.

[0326] In one embodiment, the wheel (300) may include a plurality of fourth mounting grooves (320) (e.g., fourth grooves, fourth recesses, fourth holes, rails, or injection rails) along the circumference of the wheel (300).

[0327] In one embodiment, the number of the plurality of fourth anchoring grooves (320) may correspond to half the number of the plurality of second anchoring grooves (610) of the second plate (600) (e.g., the second plate (600) of FIG. 2a).

[0328] In one embodiment, a plurality of second mounting grooves (610) of the second plate (600) may correspond to a plurality of gear grooves (not shown) of the gear (500).

[0329] In one embodiment, at least one spherical ball (330) may be placed between the fourth anchoring groove (320) and the protruding structure (940).

[0330] In one embodiment, the ball (330) may be formed in a shape corresponding to the fourth anchoring groove (320).

[0331] In one embodiment, when the user rotates the wheel (300) around the rotation axis of the wheel (300) (e.g., the y-axis in FIG. 2A) while the elastic protrusion (3101) is positioned between the fourth fixing groove (320) and the protruding structure (940), the first part (520) may provide the user with a sense of operation of the wheel (300) in response to the rotation of the first part (520) around the rotation axis (e.g., the y-axis in FIG. 2A).

[0332] In the following description, descriptions of configurations identical or similar to the configuration described above are omitted, and replaced with descriptions of FIGS. 2a to 9b.

[0333] A head mounted display device (100, 1100) according to one embodiment of the present invention comprises a wheel (300), a first plate (400) directly or indirectly coupled to the wheel and including a first mounting groove (410), a gear (500) having a first surface (500a) disposed on the first plate (400), a second plate (600) disposed on a second surface (500b) of the gear opposite to the first surface and including a plurality of second mounting grooves (610) along a circumference, and a fixing member (700) including a first surface (700a) and a second surface (700b) opposite to the first surface, wherein the fixing member comprises a protrusion (710) in which at least a part of the first surface of the fixing member is disposed in the first mounting groove and at least a part of the second surface of the fixing member is disposed in one of the plurality of second mounting grooves, and a protrusion extending from the protrusion It may include a body (720).

[0334] In one embodiment, the gear may include a first portion (520) directly or indirectly disposed on the first plate, and a second portion (530) directly or indirectly disposed on the second plate.

[0335] In one embodiment, the first plate includes a plurality of rotational grooves (420) arranged at least between the first plate and the first portion, and the plurality of rotational grooves may include a pair of first rotational grooves (421) arranged diagonally around a rotational axis of the wheel, and a pair of second rotational grooves (422) facing each of the pair of first rotational grooves.

[0336] In one embodiment, the wheel and the protrusion may be configured such that as the wheel rotates in the first direction (S1) about the rotation axis by the distance between the pair of first rotational grooves, the protrusion is disengaged from one of the first seating groove and the plurality of second seating grooves, thereby causing the gear to rotate.

[0337] In one embodiment, the wheel and the projection may be configured such that the wheel rotates in a second direction (S2) opposite to the first direction (S1) about the rotation axis by a distance between the pair of second rotational grooves, thereby causing the projection to detach from one of the first seating groove and the plurality of second seating grooves, thereby causing the gear to rotate.

[0338] In one embodiment, the first anchoring groove may include an inclined section (4101) from which the protrusion is detached, and each of the plurality of second anchoring grooves may include a first section (6101) having a planar shape and a second section (6102) extending from the first section and having a curved shape.

[0339] In one embodiment, the protrusion may be configured to be positioned in the inclined section and the second section by rotating about the rotation axis by a distance of any one of the plurality of rotational grooves.

[0340] In one embodiment, the head mounted display device may further include at least one rubber ring (800) between at least the gear and the second plate.

[0341] In one embodiment, the wheel and the first plate may be connected at least by screws.

[0342] In one embodiment, the first plate and the second plate and the first portion of the gear can be at least fit-fitted, and the second plate and the second portion of the gear can be at least fit-fitted.

[0343] In one embodiment, the fixing member may include a first fixing member (701) and a second fixing member (702) that is symmetrical with respect to the first fixing member with respect to the rotational axis of the wheel.

[0344] In one embodiment, the first fixing member and the second fixing member may be connected by at least a spring (730).

[0345] In one embodiment, the first fixing member and the second fixing member may be configured to move along at least one first guide (430) of the first plate.

[0346] In one embodiment, the first fixing member and the second fixing member may be configured to move along at least one second guide (540) of the gear.

[0347] In one embodiment, the head mounted display device further includes a first housing (900) including a protruding structure (940) on which the wheel is disposed, and the wheel may include a first surface (300a) and a second surface (300b) opposite to the first surface.

[0348] In one embodiment, the protruding structure (940) includes a plurality of third seating grooves (910) corresponding to the number of the plurality of second seating grooves along the circumference, and the wheel may include an elastic member (310) in which at least a portion of the plurality of third seating grooves contacts the second surface of the wheel.

[0349] In one embodiment, the wheel may include a plurality of fourth seating grooves (320) along the circumference of the second surface of the wheel, the number of which is half that of the plurality of second seating grooves, and at least one spherical ball (330) disposed between the plurality of fourth seating grooves and the protruding structure.

[0350] In one embodiment, the head mounted display device may further include a second housing (1000) that is directly or indirectly disposed on a second surface (600b) opposite to the first surface (600a) of the second plate.

[0351] In one embodiment, the second housing may be configured to adjust its length as the gear rotates about the rotational axis.

[0352] In one embodiment, the second housing may be configured to adjust its angle as the gear rotates about the rotational axis.

[0353] Each embodiment described herein may be used in combination with other embodiment(s) described herein.

[0354] The head-mounted display device according to the various embodiments disclosed in this document may take various forms. The head-mounted display device may include, for example, a portable communication device (e.g., a smartphone), a computer device (e.g., a laptop), a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. The head-mounted display device according to the embodiments of this document is not limited to the aforementioned devices.

[0355] The embodiments of the present disclosure disclosed in this specification and drawings are merely specific examples to easily explain the technical contents according to the embodiments of the present disclosure and to help understand the embodiments of the present disclosure, and are not intended to limit the scope of the embodiments of the present disclosure. Therefore, the scope of the various embodiments of the present disclosure should be interpreted as including all changes or modified forms derived based on the technical ideas of the various embodiments of the present disclosure in addition to the embodiments disclosed herein.

Claims

1. In a head mounted display device (100, 1100), Wheel (300); A first plate (400) coupled with the above wheel and including a first mounting groove (410); A gear (500) having a first surface (500a) disposed on the first plate (400); A second plate (600) is disposed on a second surface (500b) opposite to the first surface of the gear and includes a plurality of second mounting grooves (610) along the circumference; and It includes a fixed member (700) including a first side (700a) and a second side (700b) which is the opposite side of the first side, The above fixed member is, A protrusion (710) in which at least a portion of the first surface of the fixed member is disposed in the first mounting groove and at least a portion of the second surface of the fixed member is disposed in one of the plurality of second mounting grooves, and A head mounted display device comprising a body (720) extending from the above protrusion.

2. In paragraph 1, The above gear is, A first part (520) placed on the first plate, and A head mounted display device comprising a second portion (530) disposed on the second plate.

3. In paragraph 2, The above first plate, It includes a plurality of rotation grooves (420) arranged between at least the first plate and the first part, The above plurality of rotating grooves are, A pair of first rotation grooves (421) arranged diagonally around the rotation axis of the wheel, and A head mounted display device comprising a pair of second rotation grooves (422) facing each of the pair of first rotation grooves.

4. In paragraph 3, A head mounted display device in which the wheel and the protrusion are configured such that, as the wheel rotates in the first direction (S1) around the rotation axis by the distance between the pair of first rotational grooves, the protrusion is detached from one of the first mounting groove and the plurality of second mounting grooves, thereby causing the gear to rotate.

5. In paragraph 3, A head mounted display device in which the wheel and the protrusion are configured such that the protrusion is detached from one of the first mounting groove and the plurality of second mounting grooves so that the gear rotates as the wheel rotates in a second direction (S2) opposite to the first direction (S1) around the rotation axis by the distance between the pair of second rotation grooves.

6. In paragraph 3, The above first settling groove is, Includes an inclined section (4101) from which the above protrusion is detached, Each of the above plurality of second anchoring grooves, The first section (6101) of the plane shape, and A head mounted display device including a second section (6102) extending from the first section and having a curved shape.

7. In paragraph 6, The above protrusion is, A head mounted display device configured to be positioned in the inclined section and the second section as the wheel rotates around the rotation axis by the interval of any one of the plurality of rotational grooves.

8. In paragraph 1, The above fixed member is, First fixed member (701), and A head mounted display device including a second fixing member (702) having a symmetrical shape with respect to the first fixing member with respect to the rotation axis of the wheel.

9. In paragraph 8, A head mounted display device wherein the first fixing member and the second fixing member are connected by at least a spring (730).

10. In paragraph 8, A head mounted display device wherein the first fixing member and the second fixing member are configured to move along at least one first guide (430) of the first plate.

11. In paragraph 8, A head mounted display device wherein the first fixing member and the second fixing member are configured to move along at least one second guide (540) of the gear.

12. In paragraph 1, The above head mounted display device, Further comprising a first housing (900) including a protruding structure (940) on which the wheel is arranged; A head mounted display device comprising a first surface (300a) and a second surface (300b) opposite to the first surface.

13. In paragraph 12, The above protruding structure (940) is It includes a plurality of third anchoring grooves (910) corresponding to the number of the plurality of second anchoring grooves along the circumference, The above wheel, A head mounted display device including an elastic member (310) that contacts at least a portion of the plurality of third mounting grooves on the second surface of the wheel.

14. In paragraph 12, The above wheel, A plurality of fourth seating grooves (320) along the circumference of the second surface of the wheel, which is half the number of the plurality of second seating grooves, and A head mounted display device comprising at least one spherical ball (330) disposed between the plurality of fourth mounting grooves and the protruding structure.

15. In paragraph 1, The above head mounted display device, It further includes a second housing (1000) arranged on a second surface (600b) opposite to the first surface (600a) of the second plate, The above second housing, A head-mounted display device configured to adjust the length and / or angle as the gear rotates about the rotation axis.

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