Electronic device

Abstract

An electronic device is disclosed. An electronic device of the present disclosure comprises: a display; a flexible band connected to the display and bent in a ring shape, the band having an overlapping portion; and a motor assembly connected to the overlapping portion, wherein the motor assembly comprises: a pinion penetrating the overlapping portion; and a motor providing power to rotate the pinion, wherein portions of the band, which form the overlapping portion, may be engaged with the pinion to move in opposite directions to each other in response to the rotation of the pinion.

Description

electronic devices

[0001] The present disclosure relates to electronic devices. More specifically, the present disclosure relates to electronic devices used in VR (virtual reality), AR (augmented reality), MR (mixed reality), etc.

[0002] Virtual reality (VR) refers to a specific environment or situation, or the technology itself, created using artificial technology such as computers that is similar to reality but is not actually real.

[0003] Augmented reality (AR) refers to a technology that superimposes virtual objects or information onto a real environment to make them appear as if they exist in the original environment.

[0004] Mixed Reality (MR) or Hybrid Reality refers to combining the virtual and real worlds to create new environments or information. In particular, the term Mixed Reality is used to describe a system that allows for real-time interaction between elements existing in the real and virtual worlds.

[0005] At this time, the created virtual environment or situation stimulates the user's five senses and enables spatial and temporal experiences similar to reality, thereby allowing the user to freely cross the boundary between reality and imagination. Furthermore, the user can not only simply immerse themselves in this environment but also interact with the elements implemented within it, such as by using actual devices to perform operations or issue commands.

[0006] Recently, active research is being conducted on the equipment (gear) used in these technology fields.

[0007] The present disclosure aims to solve the aforementioned problems and other problems.

[0008] Another objective may be to provide an electronic device equipped with a ring-shaped band and a display.

[0009] Another purpose may be to provide a structure that allows the band to be tightened or loosened.

[0010] Another objective may be to provide a structure and control method that can automatically tighten or loosen the band.

[0011] Another objective may be to provide a structure and control method that can tighten or loosen the band according to user input.

[0012] Another purpose may be to provide a structure that can maintain the state of the band when tightened or loosened.

[0013] According to one aspect of the present disclosure for achieving the above or other purposes, an electronic device may include: a display; a flexible band bent into a loop shape connected to the display; a band having an overlapping portion; and a motor assembly connected to the overlapping portion, wherein the motor assembly may include: a pinion penetrating the overlapping portion; and a motor providing power to rotate the pinion, and the portions of the band forming the overlapping portion may move in opposite directions by engaging with the pinion in response to the rotation of the pinion.

[0014] The effects of the electronic device according to the present disclosure are described as follows.

[0015] According to at least one of the embodiments of the present disclosure, an electronic device having a ring-shaped band and a display can be provided.

[0016] According to at least one of the embodiments of the present disclosure, a structure capable of tightening or loosening a band can be provided.

[0017] According to at least one of the embodiments of the present disclosure, a structure and a control method capable of automatically tightening or loosening a band can be provided.

[0018] According to at least one of the embodiments of the present disclosure, a structure and a control method can be provided that can tighten or loosen a band according to user input.

[0019] According to at least one of the embodiments of the present disclosure, a structure capable of maintaining the state of a band that is tightened or loosened can be provided.

[0020] Further scopes of the applicability of the present disclosure will become apparent from the following detailed description. However, since various changes and modifications within the spirit and scope of the present disclosure are clearly understood by those skilled in the art, specific embodiments, such as the detailed description and preferred embodiments of the present disclosure, should be understood as being given merely as examples.

[0021] FIGS. 1 to 19 are drawings illustrating examples of electronic devices according to embodiments of the present disclosure.

[0022] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols are given the same reference number, and redundant descriptions thereof will be omitted.

[0023] The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification, and do not inherently possess distinct meanings or roles.

[0024] In addition, when describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art may obscure the essence of the embodiments disclosed in this specification, such detailed description is omitted. Furthermore, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that they include all modifications, equivalents, and substitutions that fall within the concept and technical scope of this disclosure.

[0025] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0026] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0027] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0028] In this application, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0029] The directional indications of Up (U), Down (D), Left (Le), Right (Ri), Front (F), and Rear (R) shown in the drawings are for convenience of explanation only and do not limit the technical concepts disclosed in this specification.

[0030]

[0031] Referring to FIG. 1, a user (P) may wear an electronic device (1) on their head. The display (10) of the electronic device (1) may be positioned on the face of the user (P) and may provide an image (video) to the eyes of the user (P). The direction in which the display (10) displays an image may be referred to as the rear (R), and the direction in which the user (P) looks at the image of the display (10) may be referred to as the front (F, z). In this way, the directions of the electronic device (1)—up (U, y), down (D), left (Le, x), right (Ri), front (F, z), and rear (R)—can be defined based on the user (P) wearing the electronic device (1).

[0032] The display (10) can provide VR (virtual reality), AR (augmented reality), or MR (mixed reality) to the user (P).

[0033] The electronic device (1) can be called a head-mounted display (HMD), a wearable display, a virtual reality (VR) device, an augmented reality (AR) device, a mixed reality (MR) device, or a display device.

[0034]

[0035] Referring to FIGS. 1 and 2, the electronic device (1) may include a display (10), a box (20), and a band (30).

[0036] The display (10) may include a housing (10H) and a display module (10D). The housing (10H) may form the exterior of the display (10). The housing (10H) may have a tub shape overall and may be open toward the face of a user (P) wearing the electronic device (1). The housing (10H) may be referred to as a goggle frame (10H). The display module (10D) may be mounted inside the housing (10H) and may be directed toward the eyes of a user (P) wearing the electronic device (1). The display module (10D) may be any one of various types of display modules, such as an LCD (Liquid Crystal Display Device) module, an OLED (Organic Light Emitting Diode) module, or an LED (Light Emitting Diode) module. For example, the first display module (10Da) may be directed toward the left eye of the user (P), and the second display module (10Db) may be directed toward the right eye of the user (P). As another example, one display module (10D) may be directed toward both eyes of the user (P). The display (10) may be referred to as a display unit (10) or a visor (10).

[0037] The box (20) may be opposite to the display (10) with respect to the head of the user (P) wearing the electronic device (1). The box (20) may be directed toward the back of the head of the user (P). The box (20) may be referred to as a battery assembly (20), a battery pack (20), or a band adjustment unit (20).

[0038] The band (30) may extend along the circumference of the user (P)'s head. A portion of the band (30) may be positioned on the user (P)'s forehead. A portion of the band (30) may be positioned on the side of the user (P)'s head. The band (30) may be referred to as a headband (30). A box (20) may wrap around a portion of the band (30) and may be attached to the band (30). A display (10) may be adjacent to one side of the band (30) and may be attached to the band (30). Accordingly, the band (30) may connect the box (20) and the display (10).

[0039] A hinge (90) can connect the display (10) and the band (30). One side of the hinge (90) can be fixed to the housing (10H) of the display (10), and the other side of the hinge (90) can be fixed to the lower edge of the band (30). The display (10) can rotate around the shaft of the hinge (90) which is parallel to the horizontal direction. Accordingly, the user can tilt the display (10) located on the face upward, or tilt the display (10) that has been tilted upward downward to position it on the face again.

[0040]

[0041] Referring to FIGS. 3 and 4, the electronic device (1) may include a front pad (30F) fixed to the inner surface of the front portion of the band (30). The front pad (30F) may be curved along the front portion of the band (30). The front pad (30F) may include a cushion material and may face the forehead of the user (P, see FIG. 1).

[0042] The housing (30H) may be positioned between the front portion of the band (30) and the front pad (30F), and may be coupled to the band (30) and the front pad (30F). The housing (30H) may be curved along the band (30). Electronic components may be mounted inside the housing (30H). For example, a first speaker (30Sa) may be mounted inside the housing (30H) adjacent to one end of the housing (30H) and may output sound. For example, a second speaker (30Sb) may be mounted inside the housing (30H) adjacent to the other end of the housing (30H) and may output sound.

[0043] The band (30) may be flexible. The band (30) may have elasticity. The band (30) may comprise a single material. Alternatively, the band (30) may comprise two or more materials. The band (30) may comprise a plastic material. An extended band (30) may be bent into a loop shape. Parts of the band (30) may overlap, and the band (30) may form a closed loop. The overlapped parts of the band (30) may be referred to as the overlap portion (30P). The band (30) may be referred to as a band assembly (30), a strap (30), or a loop (30, loop).

[0044] The box (20) can wrap around the overlapping portion (30P) of the band (30). Slits (20Ca, 20Cb, slits) can be formed in the cover (20C) of the box (20). The cover (20C) can be referred to as the case (20C). A first slit (20Ca) can be formed on the left side of the cover (20C), and the band (30) can pass through the first slit (20Ca). A second slit (20Cb) can be formed on the right side of the cover (20C), and the band (30) can pass through the second slit (20Cb).

[0045] The rear pad (20F) may face the front pad (30F). The rear pad (20F) may be attached to the front of the overlapping portion (30P) of the band (30). The rear pad (20F) may include a cushion material and may face the back of the user's (P, see FIG. 1) head. The rear pad (20F) may include a body (20Fa), a cushion (20Fb), and a fabric (20Fc). The body (20Fa) may be curved along the overlapping portion (30P) of the band (30) and may face the overlapping portion (30P). The cushion (20Fb) may be curved along the body (20Fa) and may be attached to the front of the body (20Fa). The fabric (20Fc) can cover the cushion (20Fb) and can be combined with the cushion (20Fb) and / or the body (20Fa).

[0046] The base (21) can be attached to the front of the overlapping portion (30P) of the band (30). The base (21) can be positioned between the rear pad (20F) and the overlapping portion (30P) of the band (30), and can be attached to the rear pad (20F) and the overlapping portion (30P). The base (21) can be curved along the overlapping portion (30P) of the band (30).

[0047] The frame (22) can be located at the rear of the overlap portion (30P) of the band (30) and can be coupled to the base (21) in front of the overlap portion (30P). The overlap portion (30P) of the band (30) can be positioned between the base (21) and the frame (22).

[0048] The bracket (23) can be located at the rear of the frame (22) and can be attached to the frame (22). The bracket (23) can have a shape that resembles the frame (22) overall.

[0049] The battery (24) can be attached to the rear of the bracket (23). For example, a pair of batteries (24a, 24b) can be spaced apart from each other. The battery (24) can provide the power required to operate the electronic device (1). The battery (24) can be rechargeable.

[0050] The substrate (24P) can be attached to the rear of the bracket (23). The substrate (24P) can be electrically connected to the battery (24). The substrate (24P) can be a Printed Circuit Board (PCB). The substrate (24P) can be placed between a pair of batteries (24a, 24b).

[0051] The cable (24C) may be electrically connected to the substrate (24P). Alternatively, the cable (24C) may be electrically connected directly to the battery (24). The cable (24C) may be extended and flexible. The cable (24C) may be a Flexible Flat Cable (FFC). Alternatively, the cable (24C) may be replaced with an FPCB (24C, Flexible PCB).

[0052] The motor assembly (25) and the ratchet mechanism (26) can be positioned at the rear of the overlapping portion (30P) of the band (30).

[0053] The cover (20C) may have a tub shape overall and may be open toward the front. The cover (20C) may be located at the rear of the overlapping portion (30P) of the band (30) and may be attached to the base (21) adjacent to the perimeter of the base (21). The overlapping portion (30P) of the band (30), the frame (22), the bracket (23), the battery (24), the substrate (24P), the cable (24C), the motor assembly (25), and the ratchet mechanism (26) may be placed in the internal receiving space of the cover (20C). The base (21) may be referred to as the front cover (21), and the cover (20C) may be referred to as the rear cover (20C). The base (21) and the cover (20C) may be collectively referred to as the cover (21, 20C) or the case (21, 20C).

[0054]

[0055] Referring to FIG. 5, the band (30) may include a first portion (31) and a second portion (32). The first portion (31) may be adjacent to one end of the band (30), and the second portion (32) may be adjacent to the other end of the band (30). The first portion (31) may form the first end of the band (30), and the second portion (32) may form the other end of the band (30). The first portion (31) and the second portion (32) may overlap each other to form an overlapping portion (30P) of the band (30). For example, the first portion (31) may be located in front of the second portion (32).

[0056] The first hole (31H) may be formed in the first part (31) of the band (30) and may be formed lengthwise along the length of the band (30). The length of the first hole (31H) may be greater than the width of the first hole (31H). The first hole (31H) may be a rectangular hole. The boundary of the first hole (31H) (or the part of the first part (31) forming this boundary) may include two long sides opposite each other and two short sides opposite each other. The first rack (31R) may be formed on the first long side of the boundary of the first hole (31H) and may extend along the first long side. For example, the first long side may be the upper side of the boundary of the first hole (31H).

[0057] The second hole (32H) may be formed in the second part (32) of the band (30) and may be formed lengthwise along the length of the band (30). The length of the second hole (32H) may be greater than the width of the second hole (32H). The second hole (32H) may be a rectangular hole. The boundary of the second hole (32H) (or the part of the second part (32) forming this boundary) may include two long sides (LS1, LS2) opposite each other and two short sides (SS1, SS2) opposite each other. The second rack (32R) may be formed on the second long side (LS2) of the boundary of the second hole (32H) and may extend along the second long side (LS2). For example, the second long side (LS2) may be the lower side of the boundary of the second hole (32H).

[0058] The second hole (32H) of the band (30) may face at least partially the first hole (31H) of the band (30). The second rack (32R) of the second part (32) may be located opposite the first rack (31R) of the first part (31). The first and second racks (31R, 32R) may be referred to as rack gears (31R, 32R).

[0059] The base (21) may be positioned in front of the overlapping portion (30P) of the band (30) and may be curved along the overlapping portion (30P). A groove (21G) may be formed on one side of the base (21) facing the overlapping portion (30P) of the band (30) and may extend along the overlapping portion (30P). The overlapping portion (30P) of the band (30) may be located in the groove (21G). For example, a first portion (31) of the band (30) may be located on the groove (21G), and a second portion (32) of the band (30) may be located on the first portion (31).

[0060] The pinion (250) of the motor assembly (25) can be inserted into the holes (31H, 32H) of the overlapping portion (30P) of the band (30). The pinion (250) can be positioned in the first hole (31H) and the second hole (32H), and the axial direction of the pinion (250) can intersect the overlapping portion (30P). The axial direction of the pinion (250) can be parallel to the front-rear direction. The pinion (250) can be engaged with the first rack (31R) of the first part (31) and the second rack (32R) of the second part (32). The pinion (250) can be referred to as a pinion gear (250). Since the pinion (250) is positioned between the first rack (31R) and the second rack (32R), the first part (31) and the second part (32) can move in opposite directions in response to the rotation of the pinion (250).

[0061]

[0062] Referring to FIG. 6, the frame (22) may be located at the rear of the overlapping portion (30P) of the band (30) and may be coupled to the base (21). The frame (22) may have a shape that is bent at least twice. The central portion (220) of the frame (22) may cover the rear of the overlapping portion (30P) of the band (30) and may be flat overall. A through hole (220H) may be formed in the central portion (220), and the fixing portion (250a) of the pinion (250) may pass through the through hole (220H). The left portion (221) of the frame (22) may be bent from the left side of the central portion (220), and the distance between the base (21) and the left portion (221) may decrease as it moves further away from the central portion (220). A left hole (221H) may be formed in the left portion (221). The right side (222) of the frame (22) can be bent from the right side of the central part (220), and the distance between the base (21) and the right side (222) can be reduced as it moves further away from the central part (220). A right hole (222H) can be formed in the right side (222).

[0063] The ratchet (261) of the ratchet mechanism (26) may be formed in the central portion (220) of the frame (22). The ratchet (261) may be formed as one body with the central portion (220). Alternatively, the ratchet (261) may be coupled to or fixed to the central portion (220). The ratchet (261) may protrude rearward from the central portion (220) and may include an annular wall (261a) and gear teeth (261b) formed on the inner circumference of the wall (261a). For example, the portion (220a) of the central portion (220) inside the wall (261a) may be located further forward than the portion (220b) of the central portion (220) outside the wall (261a) (see FIG. 9).

[0064]

[0065] Referring to FIG. 7, the bracket (23) may be located on the rear of the frame (22) and may be attached to the frame (22). The bracket (23) may have a shape corresponding to the frame (22). The bracket (23) may have a shape that is bent at least twice. The central portion (230) of the bracket (23) may be located on the rear of a part (220b, see FIG. 6) of the central portion (220) of the frame (22) and may be flat overall. An insertion hole (230H) may be formed in the central portion (230), and a ratchet (261) may be inserted into the insertion hole (230H). The left portion (231) of the bracket (23) may be bent along the left portion (221, see FIG. 6) of the frame (22) from the left side of the central portion (230) and may be located on the rear of the left portion (221). The left side (231) can cover the left hole (221H, see FIG. 6) of the left side (221). The right side (232) of the bracket (23) can be bent along the right side (222, see FIG. 6) of the frame (22) from the right side of the central side (230) and can be positioned on the rear of the right side (222). The right side (232) can cover the right hole (222H, see FIG. 6) of the right side (222).

[0066]

[0067] Referring to FIG. 8, the battery (24) can be coupled to the rear of the bracket (23). The first battery (24a) can be mounted on the left side (231) of the bracket (23), and the second battery (24b) can be mounted on the right side (232) of the bracket (23). The substrate (24P) can be electrically connected to the battery (24) and coupled to the rear of the bracket (23). The substrate (24P) can be positioned between the first battery (24a) and the second battery (24b) and can be mounted on the central part (230) of the bracket (23). The cable (24C) can be electrically connected to the substrate (24P) and / or the battery (24), inserted into the right hole (222H, see FIG. 6) of the frame (22) through a gap (23g, see FIG. 7) adjacent to the right side (232) of the bracket (23), and connected to the second part (32) of the band (30). The battery (24) can provide power to the display (10, see FIG. 1) through the cable (24C).

[0068]

[0069] Referring to FIG. 9, the pin (21P) may protrude from the rear of the base (21), and the pinion (250) may be rotatably coupled to the pin (21P). The fixed portion (250a) may protrude rearward from the pinion (250) and may penetrate the frame (22). The gear (251) may be located at the rear of the pinion (250) and may be rotatably coupled to the fixed portion (250a). For example, the fixed portion (250a) may have the shape of a square column and may be inserted and fixed into a circular hole of the gear (251). For example, a fastening member (Fa), such as a screw, may rotatably coupled the gear (251) to the fixed portion (250a). The gear (251) may rotate around the fastening member (Fa). Alternatively, the gear (251) may be fixed to the fixed part (250a) of the pinion (250).

[0070] Meanwhile, the substrate (24P) may be provided with a hole (24Ph) corresponding to the position of the gear (251) (see FIG. 8).

[0071]

[0072] Referring to FIGS. 10 and 11, the motor assembly (25) may include a pinion (250), a gear (251), a worm wheel (252), a worm (253), and a motor (254). The motor assembly (25) may be referred to as a rotating assembly (25) or a moving mechanism (25).

[0073] The rotation axis (A1, axis) of the gear (251) may be parallel to the center axis of the pinion (250). The rotation axis (A1) may be parallel to the front and rear directions.

[0074] The motor (254) may be located between the first and second batteries (24a, 24b) and may be coupled to the rear of the bracket (23). The motor (254) may be extended in a vertical direction. The motor (254) may be adjacent to the second battery (24b). The motor (254) may be electrically connected to the battery (24) and / or the substrate (24P), and the battery (24) may provide power to the motor (254). The motor (254) may be an electric motor capable of controlling the rotational direction, rotational angle, and rotational speed of the rotational shaft of the motor (254).

[0075] The worm (253) can be fixed to the rotation shaft of the motor (254). The worm (253) can be extended in a vertical or horizontal direction. The worm wheel (252) can be engaged with the worm (253). The worm wheel (252) can be rotatably coupled to a pin (22P, pin) protruding rearward from the frame (22). The rotation axis (A2, axis) of the worm wheel (252) can be orthogonal to the rotation axis (A3, axis) of the worm (253). For example, the rotation axis (A3) of the worm (253) can be parallel to the vertical direction, and the rotation axis (A2) of the worm wheel (252) can be parallel to the front-rear direction. The rotation axis (A2) of the worm wheel (252) may be parallel to the rotation axis (A1) of the gear (251), and the worm wheel (252) may mesh with the gear (251). The gear (251) may rotate in the opposite direction to the worm wheel (252).

[0076] Accordingly, the worm (253) and the worm wheel (252) can transmit power from the motor (254) to the gear (251). In response to the driving of the motor (254), the gear (251) can be rotated in a first rotational direction (RD1) or a second rotational direction (RD2) opposite to the first rotational direction (RD1). The first rotational direction (RD1) may be clockwise (CW), and the second rotational direction (RD2) may be counterclockwise (CCW).

[0077]

[0078] Referring to FIGS. 12 to 14, the ratchet mechanism (26) may include a ratchet (261), a pawl (262), and a wheel plate (263).

[0079] A ratchet (261) may be formed on or coupled to the frame (22). The ratchet (261) may be referred to as a fixed ratchet (261), a fixed toothed wheel (261), or a fixed toothed ring (261). The ratchet (261) may include a wall (261a) and gear teeth (261b). The wall (261a) may protrude rearward from the frame (22) and may have a ring shape. The gear teeth (261b) may be formed on the inner circumference of the wall (261a).

[0080] The pawl (262) may be located inside the ratchet (261). The pawl (262) may face a part (220a) of the frame (22) inside the ratchet (261). The pawl (262) may be parallel to the part (220a) of the frame (22). The pawl (262) may have a shuriken shape overall. The pawl (262) may be referred to as a rotating body (262), a rotating wheel (262), or a locker (262). The pawl (262) may include a body (2620) and arms (2621).

[0081] The body (2620) may form the central part of the pole (262). Arms (2621) may extend from the body (2620). Arms (2621) may extend radially from the body (2620) and may be spaced apart from each other. Arms (2621) may be referred to as spokes (2621). The first arm (2621a), the second arm (2621b), and the third arm (2621c) may be spaced apart from each other along the circumferential direction of the body (2620). The arms (2621a, 2621b, 2621c) may have the same shape. The arms (2621a, 2621b, 2621c) may have a hook shape bent counterclockwise (CCW). The arm (2621) may include a first part (26211), a second part (26212), and a third part (26213).

[0082] The first part (26211) may extend from the lateral side of the body (2620). The second part (26212) may be bent from the end of the first part (26211) in a direction intersecting the first part (26211) and may be spaced apart from the body (2620). The third part (26213) may protrude toward the body (2620) from a portion adjacent to the end of the second part (26212). A slot (2621S) may be formed in the third part (26213) and may be an elongated hole. The slot (2621S) may be extended diagonally. A projection (2621t) may be formed in the second part (26212) and may be opposite to the third part (26213). The projection (2621t) may be teeth (2621t). The first projection (2621ta) or the first tooth (2621ta) may be formed at the end of the second part (26212), and the second projection (2621tb) or the second tooth (2621tb) may be next to the first projection.

[0083] The wheel plate (263) may be located on the rear surface of the pole (262). The wheel plate (263) may be positioned between the pole (262) and the gear (251). The wheel plate (263) may have a circular plate shape. A second part (26212) of the arm (2621) may be adjacent to the edge of the wheel plate (263). The second part (26212) may be positioned along the said edge of the wheel plate (263). The protrusions (2621t) of the pole (262) may be located outside the said edge of the wheel plate (263). A pin (263P, pin) may protrude from one side (i.e., the front) of the wheel plate (263) facing the pole (262) and may be inserted into a slot (2621S). A stopper (263S) may protrude from one side (i.e., the front) of the wheel plate (263) facing the pole (262) and may be adjacent to a portion of the arm (2621) to which the first and second parts (26211, 26212) are connected. The portion of the arm (2621) may be caught by the stopper (263S). Each of the pins (263P) and the stopper (263S) may be provided in multiple numbers corresponding to multiple arms (2621a, 2621b, 2621c). Multiple pins (263Pa, 263Pb, 263Pc) and multiple stoppers (263Sa, 263Sb, 263Sc) may be arranged along the edge of the wheel plate (263).

[0084] The first pin (263Pa) can be inserted into the slot (2621S) of the first arm (2621a). The slot (2621S) can extend diagonally with respect to the circumferential direction of the wheel plate (263). The curved portion of the first arm (2621a) can be adjacent to or caught on the first stopper (263Sa).

[0085] The second pin (263Pb) can be inserted into the slot (2621S) of the second arm (2621b). The slot (2621S) can extend diagonally with respect to the circumferential direction of the wheel plate (263). The curved portion of the second arm (2621b) can be adjacent to or caught on the second stopper (263Sb).

[0086] The third pin (263Pc) can be inserted into the slot (2621S) of the third arm (2621c). The slot (2621S) can extend diagonally with respect to the circumferential direction of the wheel plate (263). The curved portion of the third arm (2621c) can be adjacent to or caught on the third stopper (263Sc).

[0087] A plurality of holes (263Va, 263Vb, 263Vc) may be formed in the wheel plate (263) and may be arranged along the edge of the wheel plate (263). A plurality of holes (263Va, 263Vb, 263Vc) may be formed in a plurality of protrusions (263Ua, 263Ub, 263Uc) protruding from the wheel plate (263).

[0088] A hollow fixed part (2620F) may protrude from one side (i.e., the front) of the body (2620) facing the frame (22) and may be inserted into a through hole (220H) of the frame (22). The fixed part (2620F) may be formed in the center of the body (2620). A central hole (263H) may be formed in the center of the wheel plate (263) and may be aligned with the hollow space (2620H) of the fixed part (2620F). The fixed part (250a) of the pinion (250) may be inserted into the hollow space (2620H) and the central hole (263H). The fixed part (250a) of the pinion (250) may be a square or angular protrusion. The hollow space (2620H) may be a hole with a shape corresponding to the fixed part (250a). That is, the hollow portion (2620H) may be a square or angled hole. The through hole (220H) and the central hole (263H) may be circular holes.

[0089] The fixed portion (250a) of the pinion (250) can be rotatably coupled to the gear (251) by passing through the hollow portion (2620H) and the central hole (263H) (see FIG. 9). The gear (251) can be fixed to the wheel plate (263). For example, a bridge (not shown) can be extended from the gear (251) and fixed to the wheel plate (263). In this case, one side of the bridge can be fixed to the gear (251), and the other side of the bridge can be fixed to the holes (263Va, 263Vb, 263Vb).

[0090] Accordingly, the gear (251) and the wheel plate (263) can rotate together, and the pawl (262) and the pinion (250) can rotate together. In a certain range, the wheel plate (263) can rotate relative to the pawl (262).

[0091]

[0092] Referring to FIGS. 14 and 15, the pawl (262) and the wheel plate (263) may be located inside the wall (261a) of the ratchet (261). The side (i.e., outer surface) of the wheel plate (263) may not come into contact with the gear teeth (261b) of the ratchet (261). The projection (2621t) of the pawl (262) may come into contact with the gear teeth (261b) of the ratchet (261). The projection (2621t) may have the shape of a gear tooth(s) that meshes with or fits the gear teeth (261b). In other words, the projection (2621t) may have the shape of a crest corresponding to the root between the gear teeth (261b).

[0093] The arms (2621a, 2621b, 2621c) of the pole (262) may have elasticity. The pole (262) may contain an elastic material such as plastic. The pole (262) in contact with the gear teeth (261b) may be in a slightly elastically deformed state.

[0094] In the first rotational direction (RD1), the wheel plate (263) fixed to the gear (251, see FIG. 9) can be rotated. Additionally, because the stopper (263S) is engaged with the arm (2621) or the pin (263P) is engaged with one end of the slot (2621S), the pawl (262) equipped with the arm (2621) can also be rotated in the first rotational direction (RD1) together with the wheel plate (263). The first rotational direction (RD1) can correspond to a direction opposite to the direction in which the second part (26212) of the arm (2621) bends from the first part (26211) (i.e., the bending direction) (i.e., the direction opposite to the bending direction). In response to the rotation of the pawl (262), the projection (2621t) of the pawl (262) can slide out of the gear teeth (261ba) of the ratchet (261). Subsequently, the projection (2621t) of the pawl (262) can engage with the second gear teeth (261bb) of the ratchet (261) by the elastic force of the arm (2621) of the pawl (262). Accordingly, the pawl (262) and the pinion (250) fixed thereto can be rotated in a first rotational direction (RD1) while passing sequentially through the gear teeth (261b) of the ratchet (261).

[0095] In the second rotational direction (RD2), the wheel plate (263) fixed to the gear (251, see FIG. 11) can be rotated. In the slot (2621S), the pin (263P) can be engaged with the other end of the slot (2621S) after moving by a certain angle (theta P). When the pin (263P) is engaged with the other end of the slot (2621S), the pawl (262) equipped with the arm (2621) can also be rotated in the second rotational direction (RD2) together with the wheel plate (263). While the pin (263P) moves from the first end of the diagonal slot (2621) to the other end (i.e., while the pin (263P) moves by a certain angle (theta P), the pin (263P) can press the arm (2621) toward the body (2620). Accordingly, the projection (2621t) of the pawl (262) can be disengaged from the gear teeth (261ba) of the ratchet (261), and the pawl (262) can be rotated in a second rotational direction (RD2) without interference from the ratchet (261). Accordingly, the pawl (262) and the pinion (250) fixed thereto can be rotated in a second rotational direction (RD2).

[0096]

[0097] Referring again to 3 to 5, the pinion (250) and the pawl (262) can be rotated clockwise (CW) or counterclockwise (CCW) in response to the driving of the motor (254). Clockwise (CW) may be the first rotation direction (RD1), and counterclockwise (CCW) may be the second rotation direction (RD2).

[0098] For example, the pinion (250) and the pawl (262) can be rotated clockwise (CW). In response to the rotation of the pinion (250), the first rack (31R) above the pinion (250) can move in a first direction (DR1), and the second rack (32R) below the pinion (250) can move in a second direction (DR2) opposite to the first direction (DR1). That is, the length of the overlapping portion (30P) formed by the first and second parts (31, 32) of the band (30) can be increased.

[0099] Accordingly, when the pinion (250) rotates clockwise (CW) by the driving force of the motor (254), the diameter (D30) of the band (30) decreases, and the band (30) can be tightened. When the driving of the motor (254) stops, the elastic force of the bent band (30) can be transmitted to the pawl (262) through the pinion (250). However, because the protrusion (2621t) of the pawl (262) engages with the gear teeth (261b) of the ratchet (261), the pinion (250) to which the elastic force was transmitted and the pawl (262) fixed thereto may not rotate counterclockwise (CCW). That is, by the ratchet (261) restricting the rotation of the pawl (262), the tightened state of the band (30) can be maintained.

[0100] For example, the pawl (262), which is released from the ratchet (261) by being pressed by the pin (263P), can be rotated counterclockwise (CCW). In response to the rotation of the pinion (250), the first rack (31R) above the pinion (250) can move in a second direction (DR2), and the second rack (32R) below the pinion (250) can move in a first direction (DR1) opposite to the second direction (DR2). That is, the length of the overlapping portion (30P) formed by the first and second parts (31, 32) of the band (30) can be reduced.

[0101] Accordingly, when the pinion (250) is rotated counterclockwise (CCW) by the driving force of the motor (254), the diameter (D30) of the band (30) increases, and the band (30) can be unraveled. The motor (254) can stop the unraveling of the band (30) by rotating the wheel plate (263) clockwise (CW) by a certain angle (theta P). In this case, the pin (263P) can move in the first rotational direction (RD1) in the slot (2621S) (see FIG. 15), the pressing of the arm (2621) by the pin (263P) can be released, and the arm (2621) can be restored so that the projection (2621t) of the arm (2621) can be caught on the gear teeth (261b) (see FIG. 15). Even if the elastic force of the bent band (30) in this state is transmitted to the pinion (250), the pinion (250) and the pawl (262) fixed thereto may not rotate in a counterclockwise direction (CCW). That is, by the ratchet (261) restricting the rotation of the pawl (262), the unwinding of the band (30) can be stopped.

[0102] In the first embodiment, as described above, the pinion (250) can be fixed to the pawl (262), and the first gear (251) can be fixed to the wheel plate (263). To this end, corresponding to the square column-shaped fixing part (250a) of the pinion (250), the pawl (262) may have a square hollow part (2620H), and the wheel plate (263) may have a circular central hole (263H). In addition, the wheel plate (263) fixed to the first gear (251) may rotate relative to the pinion (250) and the pawl (262) over a certain range.

[0103] In the second embodiment, unlike the above, the pinion (250) may be fixed to the wheel plate (263) and the first gear (251), and the pawl (262) may rotate relative to the pinion (250) over a certain range. To this end, corresponding to the square column-shaped fixed portion (250a) of the pinion (250), the wheel plate (263) may have a square central hole (263H), and the pawl (262) may have a circular hollow portion (2620H). Also, the wheel plate (263) fixed to the first gear (251) and the pinion (250) may rotate relative to the pawl (262) over a certain range.

[0104] Accordingly, the pinion (250) may be rotated by a pawl (262) that interferes with the wheel plate (263) (the first embodiment above), or fixed to the first gear (251) and rotated together with the first gear (251) (the second embodiment above). The rotation of the pinion (250) may be allowed or restricted by the pawl (262) passing sequentially over or engaging with the gear teeth (261b) of the ratchet (261) (the first and second embodiments above).

[0105]

[0106] Referring to FIG. 16, the box (20) may be equipped with a proximity sensor (20S). The proximity sensor (20S) can detect an object located within a certain distance from the proximity sensor (20S). The proximity sensor (20S) can detect an object in front of the rear pad (20F). The proximity sensor (20S) may be referred to as a device wear detection sensor (20S) or a sensor (20S). The proximity sensor (20S) may be any one of various generally known types of proximity sensors. For example, the proximity sensor (20S) may be a capacitive proximity sensor that detects an object by detecting a change in electrical capacitance. For example, the proximity sensor (20S) may be an optical proximity sensor that detects an object by detecting infrared light or other wavelengths emitted from the proximity sensor (20S) and reflected by the object, in which case the proximity sensor (20S) may be called an IR (Infrared) sensor. For example, the proximity sensor (20S) may be an ultrasonic proximity sensor that detects an object by detecting ultrasonic waves emitted from the proximity sensor (20S) and reflected by the object.

[0107] A proximity sensor (20S) may be positioned between the base (21) and the rear pad (20F). The proximity sensor (20S) may be coupled to the base (21) and / or the rear pad (20F). For example, the proximity sensor (20S) may be located at the rear of the cushion (20Fb) of the rear pad (20F). A hole (20H) may be formed in the cushion (20Fb), and the proximity sensor (20S) may face the hole (20H). Accordingly, the proximity sensor (20S) can detect an object in front of the rear pad (20F) through the hole (20H) of the cushion (20Fb) and the pores of the fabric (20Fc). Alternatively, a hole of a size corresponding to the hole (20H) of the cushion (20Fb) may also be formed in the fabric (20Fc), and the proximity sensor (20S) can detect an object in front of the rear pad (20F) through the hole (20H) of the cushion (20Fb) and the said hole of the fabric (20Fc). When the user (P) wears the electronic device (1) on their head (see FIG. 1), the proximity sensor (20S) can detect the back of the user's (P) head. That is, the proximity sensor (20S) can detect whether the user (P) is wearing the electronic device (1) on their head.

[0108] For example, the proximity sensor (20S) can be mounted in the center of the rear pad (20F) or in the vicinity thereof and can face the hole (20H) of the rear pad (20F).

[0109] As another example, a plurality of proximity sensors (20S) may be mounted on the rear pad (20F). The distance between the plurality of proximity sensors (20S) may be greater than a certain distance. The first proximity sensor (20Sa) may be adjacent to one end of the rear pad (20F) and may face the first hole (20Ha) of the rear pad (20F). The second proximity sensor (20Sb) may be adjacent to the other end of the rear pad (20F) and may face the second hole (20Hb) of the rear pad (20F). In comparison, if only one proximity sensor (20S) is provided in the box (20), even if the user does not wear the electronic device (1) on their head and instead holds the part of the rear pad (20F) corresponding to the proximity sensor (20S) with their hand, the proximity sensor (20S) may incorrectly detect that the user (P) is wearing the electronic device (1) on their head. That is, whether the user (P) is wearing the electronic device (1) on their head can be detected more accurately by multiple proximity sensors (20S).

[0110] The box (20) may be equipped with a pressure sensor (20P). The pressure sensor (20P) can detect pressure applied to the pressure sensor (20P). The pressure sensor (20P) can detect pressure applied to the rear pad (20F). The pressure sensor (20P) may be referred to as a device wearing completion detection sensor (20P) or a sensor (20P). The pressure sensor (20P) may be any one of various types of pressure sensors that are generally well known. For example, the pressure sensor (20P) may be a load cell. For example, the pressure sensor (20P) may be a piezoresistive pressure sensor that detects pressure by measuring the change in resistance of a resistor that is deformed by pressure applied to the pressure sensor (20P). For example, the pressure sensor (20P) may be a piezoelectric pressure sensor that utilizes the characteristic of a specific material generating an electrical charge when subjected to pressure. For example, the pressure sensor (20P) may be a capacitive pressure sensor that detects pressure by measuring the capacitance between two electrodes that changes due to pressure applied to the pressure sensor (20P). For example, the pressure sensor (20P) may be a strain gauge pressure sensor that detects pressure by measuring the change in resistance of a strain gauge that is deformed due to pressure applied to the pressure sensor (20P).

[0111] The pressure sensor (20P) may be positioned between the base (21) and the rear pad (20F). The pressure sensor (20P) may be coupled to the base (21) and / or the rear pad (20F). For example, the pressure sensor (20P) may be located at the rear of the cushion (20Fb). When a user (P) wears the electronic device (1) on their head (see FIG. 1), the user's (P) head may apply pressure to the pressure sensor (20P) through the cushion (20Fb), and the pressure sensor (20P) may detect this pressure. That is, the pressure sensor (20P) may detect whether the user (P) has worn the electronic device (1) on their head.

[0112] For example, the pressure sensor (20P) can be mounted in the center of the rear pad (20F) or in the vicinity therefrom.

[0113]

[0114] Referring to FIGS. 17 and 18, the controller (C) can be electrically connected to the battery (24), motor (254), proximity sensor (20S), and pressure sensor (20P). The battery (24) can provide power to the controller (C), motor (254), proximity sensor (20S), and pressure sensor (20P). The controller (C) can be mounted inside the box (20). For example, the controller (C) can be mounted on a substrate (24P) (see FIG. 10). The controller (C) can be referred to as a processor (C).

[0115] The controller (C) can determine whether the user (P) is wearing the electronic device (1) based on information obtained from the proximity sensor (20S) (S10). If the proximity sensor (20S) detects the back of the user's (P) head, the controller (C) can determine that the user (P) is wearing the electronic device (1) (S10: Yes).

[0116] When the wearing of the electronic device (1) is detected (S10: yes), the controller (C) can drive the motor (254) to tighten the band (30) after a certain time (t) has elapsed (S11) (S12). For example, the certain time (t) may be 3 seconds or less. Alternatively, the step of waiting for a certain time (t) (S11) may be omitted.

[0117] The controller (C) can determine whether the wearing of the electronic device (1) is complete based on information obtained from the pressure sensor (20P) (S13). If the pressure applied to the pressure sensor (20P) by the user (P)'s head is greater than or equal to a reference pressure, the controller (C) can determine that the wearing of the electronic device (1) is complete (S13: Yes). The reference pressure may be information initially entered into the controller (C). The reference pressure may be changed by the user. If the wearing of the electronic device (1) is not complete (S13: No), the process may return to step S12.

[0118] When the electronic device (1) is worn (S13: Yes), the controller (C) can stop the operation of the motor (254) (S14). Accordingly, when the user (P) wears the electronic device (1) on their head, the band (30) of the electronic device (1) can be automatically tightened to fit the user (P)'s head circumference.

[0119] The controller (C) can determine whether the user (P) has removed the electronic device (1) based on information obtained from the proximity sensor (20S) (S15). If the back of the user (P)'s head is not detected by the proximity sensor (20S), the controller (C) can determine that the user (P) has removed the electronic device (1) (S15: Yes).

[0120] When the removal of the electronic device (1) is detected (S15: yes), the controller (C) can drive the motor (254) to release the band (30) (S16). Accordingly, when the user (P) removes the electronic device (1) from their head, the band (30) of the electronic device (1) can be automatically released and returned to its initial diameter (D30, see FIG. 3), and the user (P) can then comfortably wear the electronic device (1) on their head again.

[0121]

[0122] Referring to FIGS. 17 and 19, the controller (C) may be electrically connected to a battery (24), a motor (254), and a switch (20B). The battery (24) may provide power to the controller (C), the motor (254), and the switch (20B). The switch (20B) may be mounted on the box (20). For example, the switch (20B) may be provided on the side of the box (20) (see FIG. 3). The switch (20B) may be a touch or mechanical button. A user (P) may input a tightening or loosening signal of the band (30) to the controller (C) by touching or operating the switch (20B).

[0123] When the user (P) touches or operates the switch (20B) to tighten the band (30) of the electronic device (1), a band tightening signal may be input to the controller (C) (S20: Yes). When the band tightening signal is input (S20: Yes), the controller (C) may drive the motor (254) to tighten the band (30) (S21). Accordingly, the band (30) of the electronic device (1) may be tightened according to the request (input) of the user (P).

[0124] When the user (P) touches or operates the switch (20B) to release the band (30) of the electronic device (1), a band release signal may be input to the controller (C) (S22: Yes). When the band release signal is input (S22: Yes), the controller (C) can drive the motor (254) to release the band (30) (S23). Accordingly, the band (30) of the electronic device (1) may be released according to the request (input) of the user (P).

[0125] The electronic device (1) may be equipped with at least one of a switch (20B), a proximity sensor (20S), or a pressure sensor (20P).

[0126] If the electronic device (1) is equipped with a switch (20B) but not with a proximity sensor (20S) and a pressure sensor (20P), the band (30) of the electronic device (1) can be tightened or loosened according to the request (input) of the user (P) as in the control method described above with reference to FIG. 19.

[0127] If the electronic device (1) is equipped with a proximity sensor (20S) and a pressure sensor (20P) but not a switch (20B), the band (30) of the electronic device (1) can be automatically tightened or loosened as in the control method described above with reference to FIG. 18.

[0128] When the electronic device (1) is equipped with a switch (20B), a proximity sensor (20S), and a pressure sensor (20P), the band (30) of the electronic device (1) can be tightened or loosened according to the request (input) of the user (P) as in the control method described above with reference to 19, and the band (30) of the electronic device (1) can be automatically tightened or loosened as in the control method described above with reference to FIG. 18.

[0129] Alternatively, the electronic device (1) may be equipped with only a switch (20B), only a proximity sensor (20S), or only a pressure sensor (20P).

[0130]

[0131] Referring to FIGS. 1 to 19, the electronic device (1) may include: a display (10); a flexible band (30) that is connected to the display (10) and is bent into a loop shape, the band (30) having an overlapping portion (30P); and a motor assembly (25) connected to the overlapping portion (30P), the motor assembly (25) may include: a pinion (250) that penetrates the overlapping portion (30P); and a motor (254) that provides power to rotate the pinion (250), and parts (31, 32) of the band (30) forming the overlapping portion (30P) may move in opposite directions by engaging with the pinion (250) in response to the rotation of the pinion (250).

[0132] The electronic device (1) may further include a controller (C) electrically connected to the motor (254), and the controller (C) may control the motor (254) to rotate the pinion (250) in a first rotational direction (RD1) to tighten the band (30), or control the motor (254) to rotate the pinion (250) in a second rotational direction (RD2) opposite to the first rotational direction (RD1) to loosen the band (30).

[0133] The electronic device (1) may further include: a base (21) positioned along the inner side of the overlap portion (30P) of the band (30); and a proximity sensor (20S) mounted on the base (21) and electrically connected to the controller (C), wherein the controller (C) can control the motor (254) to tighten the band (30) when the proximity sensor (20S) detects an object.

[0134] The above proximity sensor (20S) may include: a first proximity sensor (20Sa) adjacent to one end of the base (21); and a second proximity sensor (20Sb) adjacent to the other end of the base (21).

[0135] The electronic device (1) may further include a pressure sensor (20P) mounted on the base (21) and electrically connected to the controller (C), and the controller (C) may stop the operation of the motor (254) if the pressure applied to the pressure sensor (20P) is greater than or equal to a reference pressure.

[0136] The electronic device (1) may further include a rear pad (20F) coupled to the base (21) and having a cushion (20Fb), and the pressure sensor (20P) and the proximity sensor (20S) may be located between the base (21) and the cushion (20Fb) of the rear pad (20F), and the cushion (20Fb) may include a hole (20H) facing the proximity sensor (20S).

[0137] The controller (C) can control the motor (254) to return the band (30) to its initial state if no object is detected by the proximity sensor (20S).

[0138] The electronic device (1) may further include: a cover (20C) that covers the overlapping portion (30P) of the band (30); and a switch (20B) mounted on the cover (20C) and electrically connected to the controller (C), and the controller (C) may control the motor (254) to tighten the band (30) when a band tightening signal is input from the switch (20B).

[0139] The above controller (C) can control the motor (254) to release the band (30) when a band release signal is input from the switch (20B).

[0140] The electronic device (1) may further include: a box (20) that encloses the overlap portion (30P) of the band (30); a proximity sensor (20S) mounted on the box (20) and electrically connected to the controller (C); a pressure sensor (20P) mounted on the box (20) and electrically connected to the controller (C); and a switch (20B) mounted on the box (20) and electrically connected to the controller (C).

[0141] The electronic device (1) may further include: a cover (20C) covering the overlapping portion (30P) of the band (30) and the motor assembly (25); and a pair of batteries (24a, 24b) disposed inside the cover (20C), and the motor assembly (25) may be located between the pair of batteries (24a, 24b).

[0142] The parts (31, 32) of the band (30) forming the overlapping portion (30P) may include: a first part (31) forming one end of the band (30); a first part (31) having a first rack (31R) that engages with the pinion (250); and a second part (32) forming the other end of the band (30) and overlapping with the first part (31); a second part (32) having a second rack (32R) that is opposite to the first rack (31R) with respect to the pinion (250) and engages with the pinion (250).

[0143] The motor assembly (25) may further include: a worm (253) fixed to the rotating shaft of the motor (254); a worm wheel (252) engaged with the worm (253); and a gear (251) engaged with the worm wheel (252) and coupled to the pinion (250).

[0144] The electronic device (1) may further include: a frame (22) located between the pinion (250) and the gear (251); a rotating body (262) located between the frame (22) and the gear (251); a wheel plate (263) located between the rotating body (262) and the gear (251); an annular wall (261a) formed on the frame (22) and covering the side of the rotating body (262); and gear teeth (261b) formed on the inner circumference of the wall (261a), and the rotating body (262) may include a projection (2621t) that engages with the gear teeth (261b).

[0145] The above display (10) can provide VR (virtual reality), AR (augmented reality), or MR (mixed reality) images.

[0146]

[0147] Some or other embodiments of the present disclosure described above are not exclusive or distinguishable from one another. Some or other embodiments of the present disclosure described above may be used in combination or combined for their respective configurations or functions.

[0148] For example, this means that configuration A described in a specific embodiment and / or drawing and configuration B described in another embodiment and / or drawing can be combined. That is, even if the combination between configurations is not directly described, it means that combination is possible, except in cases where it is described that combination is impossible.

[0149] The foregoing detailed description should not be interpreted restrictively in all respects and should be considered exemplary. The scope of the invention shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention.

Claims

1. Display; A flexible band connected to the above display and bent into a loop shape; a band having an overlapping portion; and, It includes a motor assembly connected to the above-mentioned overlap, The above motor assembly is: A pinion penetrating the above-mentioned overlapping portion; and, It includes a motor that provides power to rotate the pinion, and The portions of the band forming the above-mentioned overlap are, An electronic device that moves in opposite directions by engaging with the pinion in response to the rotation of the pinion.

2. In Paragraph 1, It further includes a controller electrically connected to the above motor, The above controller is, The motor is controlled so that the pinion rotates in a first rotational direction to tighten the band, An electronic device that unwinds the band by controlling the motor so that the pinion rotates in a second rotational direction opposite to the first rotational direction.

3. In Paragraph 2, A base disposed along the inner side of the overlapping portion of the above band; and, It further includes a proximity sensor mounted on the base and electrically connected to the controller, The above controller is, An electronic device that controls the motor to tighten the band when the proximity sensor detects an object.

4. In Paragraph 3, The above proximity sensor is: A first proximity sensor adjacent to one end of the base; and, An electronic device comprising a second proximity sensor adjacent to the other end of the base.

5. In Paragraph 3, It further includes a pressure sensor mounted on the base and electrically connected to the controller, The above controller is, An electronic device that stops the operation of the motor when the pressure applied to the pressure sensor is greater than or equal to a reference pressure.

6. In Paragraph 5, It further includes a rear pad coupled to the above base and having a cushion, and The pressure sensor and the proximity sensor are, Located between the cushion of the base and the rear pad, The above cushion is: An electronic device including a hole facing the above-mentioned proximity sensor.

7. In Paragraph 3, The above controller is, An electronic device that controls the motor to return the band to its initial state when an object is not detected by the proximity sensor.

8. In Paragraph 2, A cover wrapping the overlapping portion of the above band; and, It further includes a switch mounted on the above cover and electrically connected to the above controller, The above controller is, An electronic device that controls the motor to tighten the band when a band tightening signal is input from the switch.

9. In Paragraph 8, The above controller is, An electronic device that controls the motor to release the band when a band release signal is input from the above switch.

10. In Paragraph 2, A box surrounding the overlapping portion of the above band; A proximity sensor mounted on the above box and electrically connected to the above controller; A pressure sensor mounted in the above box and electrically connected to the above controller; and, An electronic device further comprising a switch mounted on the above box and electrically connected to the above controller.

11. In Paragraph 1, A cover surrounding the overlapping portion of the above band and the motor assembly; and, It further includes a pair of batteries disposed inside the above cover, and The above motor assembly is, An electronic device located between the above pair of batteries.

12. In Paragraph 1, The portions of the band forming the above overlap are: A first part forming one end of the above band; a first part having a first rack engaged with the pinion; and, An electronic device comprising: a second part that forms the other end of the band and overlaps the first part; and a second part having a second rack opposite to the first rack with respect to the pinion and engaged with the pinion.

13. In Paragraph 1, The above motor assembly is: A worm fixed to the rotating shaft of the above motor; A worm wheel engaged with the above worm; and, An electronic device further comprising a gear that meshes with the worm wheel and is coupled to the pinion.

14. In Paragraph 13, A frame located between the pinion and the gear; A rotating body located between the above frame and the above gear; A wheel plate located between the above-mentioned rotating body and the above-mentioned gear; An annular wall formed on the above frame and wrapping the side of the rotating body; and, It further includes gear teeth formed on the inner surface of the above wall, The above rotating body is: An electronic device comprising a projection that meshes with the above-mentioned gears.

15. In Paragraph 1, The above display is, An electronic device that provides VR (virtual reality), AR (augmented reality), or MR (mixed reality) images.

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