Electronic device and projector

Abstract

This electronic device comprises: a fixed frame; a rotating frame that can rotate with respect to the fixed frame; a motor for providing power for rotating the rotating frame; a rotating shaft rotated by the motor; a first gear which is separably coupled to the rotating shaft, and which can rotate by the power of the motor transmitted through the rotating shaft; and a second gear engaged with the first gear so that the rotating frame rotates with respect to the fixed frame. The rotating frame can rotate with respect to the fixed frame by means of external force when the first gear and the second gear are separated from each other.

Description

Electronic devices and projectors

[0001] The present disclosure relates to an electronic device and a projector having an improved structure.

[0002] The electronic device may include a main body and a wheel provided to move the main body. Through the above configuration, the electronic device may be able to move easily within a space.

[0003] The electronic device may include a sensor that detects obstacles. The electronic device may use information detected by the sensor to avoid obstacles or map a movable area.

[0004] The electronic device having the above-described configuration may include a projector, etc., which is movably arranged to project an image onto any area. The electronic device may project images and / or video onto any area. The electronic device may adjust the projection area of ​​images and / or video by rotating a part of the electronic device.

[0005] However, when a defect occurs in a motor using a worm gear, reverse rotation is physically impossible due to the self-locking characteristics of the worm gear, so the rotating part of the electronic device cannot be manually rotated for maintenance.

[0006] One aspect of the present disclosure provides an electronic device with an improved structure.

[0007] One aspect of the present disclosure provides an electronic device that allows for easy separation of gears.

[0008] One aspect of the present disclosure provides an electronic device that can be manually operated.

[0009] The technical problems to be solved in this document are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this invention belongs from the description below.

[0010] An electronic device according to one embodiment comprises a fixed frame, a rotating frame rotatable with respect to the fixed frame, a motor provided to provide power for rotating the rotating frame, a rotating shaft provided to be rotated by the motor, a first gear detachably coupled to the rotating shaft and rotatable by the power of the motor transmitted through the rotating shaft, and a second gear provided to mesh with the first gear so that the rotating frame rotates with respect to the fixed frame. The rotating frame can rotate with respect to the fixed frame by an external force when the first gear and the second gear are separated.

[0011] Other aspects, features, and advantages of the foregoing and specific embodiments of the present disclosure will become clear from the description below with reference to the accompanying drawings.

[0012] FIG. 1 is a perspective view of an electronic device according to one embodiment of the present disclosure.

[0013] FIG. 2 is an exploded view of an electronic device according to one embodiment of the present disclosure.

[0014] FIG. 3 is a perspective view of the interior of an electronic device according to one embodiment of the present disclosure.

[0015] FIG. 4 is an exploded view of the interior of an electronic device according to one embodiment of the present disclosure.

[0016] FIG. 5 is a disassembled view of a fixed frame in a rotating frame according to one embodiment of the present disclosure.

[0017] FIG. 6 is a cross-sectional perspective view of an electronic device according to one embodiment of the present disclosure.

[0018] FIG. 7 is an exploded view illustrating a power transmission device according to one embodiment of the present disclosure.

[0019] FIG. 8 is an exploded view of a power transmission device according to one embodiment of the present disclosure.

[0020] FIG. 9 is an enlarged view of the interior of an electronic device according to one embodiment of the present disclosure.

[0021] FIG. 10 is a cross-sectional view of an electronic device according to one embodiment of the present disclosure.

[0022] FIG. 11 is a cross-sectional view of the first gear separated from the electronic device of FIG. 10.

[0023] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0024] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0025] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0026] In this document, each of the phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. For example, when an expression such as "at least" is used before elements and a list, it is interpreted as limiting the entire list of elements, rather than limiting each individual element included in the list. For example, the expression "at least one of A, B, or C" should be understood to include cases including only A, only B, only C, both A and B, both A and C, both B and C, or all of A, B, and C.

[0027] The term "and / or" includes a combination of multiple related described components or any of the multiple related described components.

[0028] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another corresponding component and do not limit the components in other aspects (e.g., importance or order).

[0029] Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0030] Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this document, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0031] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0032] When it is said that a component is located "on" another component, this includes not only cases where a component is in contact with another component, but also cases where another component exists between the two components.

[0033] The terms "part," "module," and "component" may be implemented in hardware or software. Depending on the embodiments, a plurality of "parts," "modules," and "components" may be implemented as a single component, or a single "part," "module," or "component" may include a plurality of components.

[0034] Terms such as "~part," "~unit," "~block," "~part," and "~module" may refer to a unit that processes at least one function or operation. For example, the above terms may refer to at least one piece of hardware such as an FPGA (field-programmable gate array) or ASIC (application specific integrated circuit), at least one piece of software stored in memory, or at least one process processed by a processor.

[0035] The symbols attached to each action are used to identify each step and do not indicate the order of the actions among themselves; the actions may be performed differently from the specified order unless a specific order is clearly indicated in the context.

[0036] Meanwhile, terms such as "front-rear direction," "front," "rear," "upper side," and "lower side" used in the following description are defined based on the drawings, and the shape and position of each component are not limited by these terms. For example, "upper / lower direction" refers to the Z direction based on the drawings, and "upper" and "lower" may refer to the upward (+Z direction) and downward (-Z direction) directions in the Z direction, respectively, based on the drawings. "Front-rear direction" refers to the X direction based on the drawings, and "front" and "rear" may refer to the front (+X direction) and rear (-X direction), respectively, in the X direction based on the drawings.

[0037] An electronic device according to one embodiment comprises a fixed frame, a rotating frame rotatable with respect to the fixed frame, a motor provided to provide power for rotating the rotating frame, a rotating shaft provided to be rotated by the motor, a first gear detachably coupled to the rotating shaft and rotatable by the power of the motor transmitted through the rotating shaft, and a second gear provided to mesh with the first gear so that the rotating frame rotates with respect to the fixed frame. The rotating frame can rotate with respect to the fixed frame by an external force when the first gear and the second gear are separated.

[0038] A projector according to one embodiment is a projector configured to project an image, comprising: a fixed frame; a rotating frame rotatable with respect to the fixed frame; a projection lens provided on the rotating frame to project an image onto an arbitrary area; a motor providing power to rotate the rotating frame; and a power transmission device configured to transmit the power of the motor to the fixed frame. The power transmission device comprises a worm gear that rotates by the power of the motor and a first gear configured to rotate in connection with the worm gear. It further comprises a second gear configured to be connected to the fixed frame and mesh with the first gear. The first gear is separable from the second gear.

[0039] An electronic device according to one embodiment comprises a fixed frame, a rotating frame rotatable with respect to the fixed frame, a motor provided on the rotating frame, a worm gear that rotates by the power of the motor, a rotating shaft that rotates by the worm gear, a first gear rotatable by the power of the motor transmitted through the rotating shaft, and a second gear provided to mesh with the first gear so as to cause the rotating frame to rotate with respect to the fixed frame. The rotating frame is rotatable with respect to the fixed frame by an external force when the first gear and the second gear are separated. Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the attached drawings.

[0040] An electronic device (1) according to various embodiments of the present disclosure may perform specific tasks while moving. For example, the electronic device (1) may include a projector (1a, see FIGS. 1 and 2) which is movably provided to project an image onto any area. The present disclosure may be applied to any drivable device in addition to the examples described above.

[0041] FIG. 1 is a perspective view of an electronic device according to one embodiment of the present disclosure. FIG. 2 is an exploded view of an electronic device according to one embodiment of the present disclosure.

[0042] Referring to FIGS. 1 and FIGS. 2, a projector (1a) is described as an example of an electronic device (1).

[0043] A projector (1a) may be a device configured to project an image onto any area. For example, the projector may project an image onto a screen, wall, floor, ceiling, furniture, etc. The image may include photographs, videos, text, etc.

[0044] The projector (1a) may include a housing (10). The housing (10) may form the exterior of the projector (1a). The housing (10) may be provided to accommodate a light source, an optical member for guiding light emitted from the light source toward a projection lens (30), and an image processing device (e.g., including an LCD panel, a DMD chip and / or an LCoS panel). The housing (10) may be referred to as a main body (10), a case (10), etc.

[0045] The projector (1a) may include a projection lens (30). The projection lens (30) may be configured to project an image generated by the projector (1a) onto an arbitrary area. The projection lens (30) may adjust the focus so that the image can be seen clearly. The projection lens (30) may adjust the size of the image according to the projection distance.

[0046] The projector (1a) may include a driving device (20). The driving device (20) may be detachably mounted on the lower part of the housing (10). The driving device (20) may include at least one wheel (21) mounted on the lower part of the housing (10) and arranged to move the housing (10). As an example, the driving device (20) may include a pair of wheels (21). The driving device (20) may include a wheel drive unit (not shown) for driving the wheels (21).

[0047] The wheel (21) may be rotatable. Specifically, the wheel (21) may be rotatable relative to the housing (10). As the wheel (21) rotates, the projector (1a) may move or change its direction of travel.

[0048] The housing (10) may include a rotating part (11) and a fixed part (12). The rotating part (11) may be arranged to rotate relative to the fixed part (12). A projection lens (30) may be placed on the rotating part (11). Specifically, the projection lens (30) placed on the rotating part (11) can project an image generated by the projector (1a) onto an area of ​​various heights. For example, if the image generated by the projector (1a) is to be projected onto a wall, the rotating part (11) may be rotated so that the projection lens (30) faces forward (+X direction). For example, if the image generated by the projector (1a) is to be projected onto a ceiling, the rotating part (11) may be rotated so that the projection lens (30) faces the ceiling. Additionally, by combining with the driving device (20), the projector (1a) can be moved and the projection lens (30) can be rotated, and accordingly, the image generated by the projection lens (30) can be projected onto areas of different heights located at different positions.

[0049] The projector (1a) may include a frame (40). The frame (40) may be placed inside a housing (10). A portion of the frame (40) may be exposed to the outside of the housing (10). The housing (10) may be provided to cover all or part of the frame (40).

[0050] The driving device (20) can be coupled to the frame (40). That is, the wheel (21) can be coupled to the frame (40) and arranged to rotate.

[0051] The frame (40) may include a rotating frame (41, see FIG. 3) and a fixed frame (42). The rotating frame (41) may be placed inside the rotating part (11).

[0052] A portion of the fixed frame (42) may be exposed to the outside of the fixed part (12). A portion of the fixed frame (42) may be exposed to the outside of the housing (10). A portion of the fixed frame (42) may be placed inside the fixed part (12). The fixed part (12) may be provided to cover one side of the fixed frame (42).

[0053] The rotating frame (41) can be coupled to the rotating part (11). The fixed frame (42) can be coupled to the fixed part (12).

[0054] The frame (40) may include a gearbox. The gearbox may be configured to generate power to be transmitted to the driving device (20) so that the projector (1a) can move.

[0055] The projector (1a) may include a lifting assembly (15). The lifting assembly (15) may include a sensor for detecting an obstacle and components for lifting the sensor to the outside of the housing (10).

[0056] FIG. 3 is an internal perspective view of an electronic device according to one embodiment of the present disclosure. FIG. 4 is an exploded view of the interior of an electronic device according to one embodiment of the present disclosure. FIG. 5 is a view showing the fixed frame exploded from a rotating frame according to one embodiment of the present disclosure. FIG. 6 is a cross-sectional perspective view of an electronic device according to one embodiment of the present disclosure.

[0057] The projector (1a) may include a base (43). The frame (40) may include a base (43). The base (43) may be placed inside the rotating part (11) and may be provided to support the lifting assembly (15). Additionally, the base (43) may be provided to connect a pair of rotating frames (41).

[0058] The projector (1a) may include a power transmission device (80, see FIG. 7). The base (43) may include a base cover (44) to cover all or part of the power transmission device (80). The base cover (44) may be configured to dampen and / or suppress vibrations occurring in the power transmission device (80).

[0059] The base (43) can be joined to the rotating frame (41) by a frame bracket (60). The base (43) can be arranged to connect a pair of rotating frames (41) by a pair of frame brackets (60). A power transmission device (80) can be arranged to transmit power to one of the rotating frames (41).

[0060] Even if the power transmission device (80) transmits power to a single rotating frame (41), a pair of rotating frames (41) can be connected by a base (43) and arranged to rotate together.

[0061] A fixed frame (42) may be positioned on the outside of a rotating frame (41). According to one embodiment, the fixed frame (42) may be provided as a pair of fixed frames (42) such that they are provided on the outside of each of a pair of rotating frames (41).

[0062] In the drawing, the power transmission device (80) is shown as being placed inside the rotating part (11), but is not limited thereto and includes all configurations and arrangements capable of rotating the rotating part (11) relative to the fixed part (12). However, for convenience of explanation, the following description will focus on the frame (40) on the side where the power transmission device (80) placed inside the rotating part (11) transmits power.

[0063] The base (43) can support all or part of the power transmission device (80). The base (43) can support the motor (81) to be described later. Referring to FIG. 8, the base (43) can support the worm gear (82), the rotating shaft (85), and the first gear (100), etc., among the components of the power transmission device (80) to be described later.

[0064] The projector (1a) may include a second gear (200) arranged to be connected to a fixed frame (42). The second gear (200) may be coupled to the inside of the fixed frame (42).

[0065] The first gear (100) and the second gear (200) of the power transmission device (80) can be meshed. The first gear (100) can rotate by receiving power from the motor (81), and the second gear (200) can be arranged to rotate within an extended range. The rotating frame (41) can be arranged so that the second gear (200) rotates within an extended angle range.

[0066] When the first gear (100) rotates by engaging with the second gear (200) connected to the fixed frame (42), the relative angular position of the rotating frame (41) and the fixed frame (42) can change.

[0067] The fixed frame (42) may not rotate because it is supported by the wheel (21). When the first gear (100) and the second gear (200) mesh and rotate, the relative angular position of the rotating frame (41) and the fixed frame (42) changes, so the rotating frame (41) can be arranged to rotate relative to the fixed frame (42).

[0068] As the rotating frame (41) rotates relative to the fixed frame (42), the rotating part (11) that can be coupled to the rotating frame (41) can rotate relative to the fixed part (12). With this configuration, the projector (1a) can be configured to project an image or video onto any area using the rotating part (11) that rotates relative to the fixed part (12).

[0069] The projector (1a) may include a bearing (50) provided to connect a rotating frame (41) and a fixed frame (42). The bearing (50) may be provided to connect the rotating frame (41) and the fixed frame (42) by passing through the center of the rotating frame (41) and the center of the fixed frame (42). The rotating frame (41) may rotate around the bearing (50).

[0070] The projector (1a) may include a bearing cover (51). The bearing cover (51) may support the bearing (50) to prevent the bearing (50) from moving outward and to secure the bearing (50). The bearing cover (51) may be secured to the outside of the fixed frame (42).

[0071] FIG. 7 is an exploded view illustrating a power transmission device according to one embodiment of the present disclosure. FIG. 8 is an exploded view of a power transmission device according to one embodiment of the present disclosure.

[0072] Referring to FIGS. 7 and FIGS. 8, a projector (1a) according to one embodiment of the present disclosure may include a power transmission device (80).

[0073] The power transmission device (80) may include a motor (81) provided to provide power to rotate the rotating frame (41). The motor (81) may be provided to provide power to rotate the rotating part (11).

[0074] The motor (81) may be provided on the rotating frame (41). The motor (81) may be seated on the base (43). The motor (81) may be supported by the base (43).

[0075] The power transmission device (80) may include a worm gear (82). The worm gear (82) may include a worm (83) and a worm wheel (84). The worm may be connected to a motor (81) and arranged to rotate around the drive shaft (a) of the motor (81). The worm (83) may be arranged to transmit power from the motor (81) to the worm wheel (84).

[0076] The worm wheel (84) can rotate in a direction that intersects with the direction in which the worm (83) rotates. The worm wheel (84) may include a helical gear. The power transmission device (80) may include a worm gear (82) to transmit power with a large reduction ratio. When the reduction ratio is large, power transmission can be prevented even if the rotational output is applied in reverse.

[0077] The worm gear (82) can be seated on the base (43) and supported by the base (43). The base cover (44) can be provided to cover the motor (81) and the worm gear (82).

[0078] The power transmission device (80) may include a rotating shaft (85) and a first gear (100). The rotating shaft (85) may be configured to rotate by a motor (81). The rotating shaft (85) may be configured to transmit power from a worm gear (82) to a first gear (100). The rotating shaft (85) may be coupled with a worm wheel (84) and a first gear (100). For example, the rotating shaft (85) may be coupled to a worm wheel (84) so ​​that rotation of the worm wheel (84) by the motor (81) can cause rotation of the rotating shaft (85).

[0079] The rotating shaft (85) may be configured to transmit power to the first gear (100), including a D-cut processing section (86).

[0080] The power transmission device (80) may include a bushing (90) that is provided to cover a portion of the rotating shaft (85) and is provided to be seated on the base (43). The bushing (90) may be supported by the base (43). The bushing (90) may be provided to prevent damage to the rotating shaft (85).

[0081] The first gear (100) may be arranged to rotate around a rotating shaft (85). The first gear (100) may be detachably coupled to the rotating shaft (85). The first gear (100) may be detachably coupled to a D-cut machined portion (86) of the rotating shaft (85). The first gear (100) may include teeth (101). The teeth (101) may be provided in multiple numbers. The first gear (100) may be detachable in the direction in which the teeth (101) extend. When the first gear (100) is separated from the rotating shaft (85), it may also be separated from the second gear (200).

[0082] According to one embodiment, the first gear (100) may include a spur gear. If the first gear (100) is a spur gear, the first gear (100) may be separable in the same direction as the direction in which the rotation shaft (85) is extended. The teeth (101) of the first gear (100) may extend in the same direction as the direction in which the rotation shaft (85) is extended. The first gear (100) may be separable from the rotation shaft (85) by moving in the same direction as the direction in which the teeth (101) are extended.

[0083] According to one embodiment, the first gear (100) may include a helical gear. When the first gear (100) is a helical gear, the first gear (100) may be separable in a direction intersecting the direction in which the rotation shaft (85) is extended. The teeth (101) of the first gear (100) may extend in a direction intersecting the direction in which the rotation shaft (85) is extended. The first gear (100) may be separable from the rotation shaft (85) by moving in the same direction as the direction in which the teeth (101) are extended. Below, the case in which the first gear (100) is a spur gear will be described.

[0084] The first gear (100) may be separable from the rotating shaft (85) in the direction in which the teeth (101) of the first gear (100) are extended.

[0085] The first gear (100) may include a groove (102) which is a space between a plurality of teeth (101). The groove (102) may be provided as a plurality of grooves (102). The end of the groove (102) of the first gear (100) may be open so that the second gear (200) and the teeth (101) can be spaced apart in an extended direction.

[0086] The projector (1a) may include a fastening member (110). The fastening member (110) may include a screw. The fastening member (110) may be provided to fasten the rotating shaft (85) and the first gear (100) to each other. The fastening member (110) may rotatably connect the first gear (100) to the rotating shaft (85).

[0087] The rotating shaft (85) may include a fastening portion (87) formed such that a fastening member (110) is coupled and a first gear (100) can be rotatably coupled to the rotating shaft (85). Screw threads may be formed on the fastening portion (87).

[0088] In the drawing, the fastening member (110) is shown as a screw, but is not limited thereto and may include any configuration capable of rotatably fastening the first gear (100) to the rotating shaft (85). For example, the fastening member (110) may be an E-ring. If the fastening member (110) is an E-ring, the fastening portion (87) may be formed to be recessed into the outer surface of the rotating shaft (85).

[0089] FIG. 9 is an enlarged view of the interior of an electronic device according to one embodiment of the present disclosure.

[0090] Referring to FIG. 9, a projector (1a) according to one embodiment of the present disclosure may include a through hole (421) formed in a fixed frame (42). A first gear (100) may be exposed to the outside through the through hole (421).

[0091] The through hole (421) may be circular. The diameter of the through hole (421) may be larger than the diameter of the tip circle of the first gear (100). The width of the through hole (421) may be a width through which the first gear (100) can pass. However, the shape of the through hole (421) is not limited thereto. The through hole (421) may be any shape having a width through which the first gear (100) can pass.

[0092] The fastening member (110) may be provided to be separable through the through hole (421). The fastening member (110) may be separable from the rotating shaft (85) by passing through the through hole (421).

[0093] The through hole (421) may be positioned at a location corresponding to the first gear (100). The through hole (421) may be positioned so that the fastening member (110) is exposed to the outside of the fixed frame (42). The through hole (421) may be positioned so that all or part of the first gear (100) is exposed to the outside of the fixed frame (42).

[0094] FIG. 10 is a cross-sectional view of an electronic device according to one embodiment of the present disclosure. FIG. 11 is a cross-sectional view of the electronic device of FIG. 10 with the first gear separated.

[0095] Referring to FIGS. 10 and 11, a projector (1a) according to one embodiment of the present disclosure may include a first gear (100) that is detachably provided with a second gear (200).

[0096] The fastening member (110) can pass through the through hole (421) to allow the first gear (100) to be separated from the rotating shaft (85). The fastening member (110) can be separated from the first gear (100) through the through hole (421).

[0097] The first gear (100) may be separable in whole or in part from the rotating shaft (85). The first gear (100) may be disengaged from the second gear (200) by passing through the through hole (421). The first gear (100) may be spaced apart from the second gear (200). The first gear (100) may pass through the fixed frame (42) through the through hole (421).

[0098] The first gear (100) can be separated from the second gear (200) by passing through the through hole (421). The first gear (100) can move in the direction of the through hole (421) until the engagement with the second gear (200) is released.

[0099] The through hole (421) can be positioned so that the first gear (100) moves in the direction in which the rotating shaft (85) extends and passes through the fixed frame (42).

[0100] However, the present disclosure is not limited to the examples described above, and the arrangement of the through hole (421) may include all positions in which the first gear (100) can be positioned to move in the direction in which the tooth (101) extends and penetrate the fixed frame (42).

[0101] When the first gear (100) and the second gear (200) are engaged, the power transmission device (80) cannot transmit power in the reverse direction of the power transmission direction, so the rotating frame (41) may not be able to be rotated relative to the fixed frame (42) by an external force.

[0102] When the first gear (100) and the second gear (200) are separated, power is not transmitted in the reverse direction of the power transmission direction of the power transmission device (80), but the rotating frame (41) can be made to rotate relative to the fixed frame (42) by an external force.

[0103] An electronic device (1) according to one embodiment comprises a fixed frame (42), a rotating frame (41) rotatable with respect to the fixed frame (42), a motor (81) provided to provide power to rotate the rotating frame (41), a rotating shaft (85) provided to be rotated by the motor (81), a first gear (100) detachably coupled to the rotating shaft (85) and rotatable by the power of the motor (81) transmitted through the rotating shaft (85), and a second gear (200) provided to mesh with the first gear (100) so that the rotating frame (41) rotates with respect to the fixed frame (42). The rotating frame (41) can rotate with respect to the fixed frame (42) by an external force when the first gear (100) and the second gear (200) are separated.

[0104] It may further include a worm wheel (84) coupled to the rotating shaft (85), and a worm (83) that engages with the worm wheel (84) to rotate the worm wheel (84).

[0105] The above worm may be arranged to rotate around the drive shaft (a) of the motor (81).

[0106] The direction in which the drive shaft (a) is extended and the direction in which the rotation shaft (85) is extended may intersect.

[0107] The first gear (100) can be separated from the rotating shaft (85) and the teeth (101) of the first gear (100) in the direction in which they extend.

[0108] The first gear (100) above may include a spur gear.

[0109] The fixed frame (42) may include a through hole (421) formed so that the first gear (100) passes through the fixed frame (42).

[0110] It may further include a fastening member (110) that fastens the first gear (100) and the rotating shaft (85).

[0111] The above fastening member (110) can be provided to be separable from the 1 gear (100) through the through hole (421).

[0112] The above through hole (421) can be positioned so that the first gear (100) can move in the direction in which the rotating shaft (85) extends and pass through the fixed frame (42).

[0113] It may further include a base that is coupled with the rotating frame (41) and accommodates the motor (81).

[0114] The above-mentioned rotating frame (41) can be provided on both sides of the base (43).

[0115] The fixed frame (42) can be provided on the outside of the rotating frame (41).

[0116] The first gear (100) may be movable to the outside of the rotating frame (41).

[0117] The device further includes a bearing (50) that passes through the rotating frame (41) and the fixed frame (42) and connects the rotating frame (41) and the fixed frame (42), and the rotating frame (41) can rotate around the bearing (50).

[0118] A projector (1a) according to one embodiment is a projector (1a) configured to project an image, comprising: a fixed frame (42); a rotating frame (41) rotatable relative to the fixed frame (42); a projection lens (30) provided on the rotating frame (41) to project an image onto an arbitrary area; a motor (81) providing power to rotate the rotating frame (41); and a power transmission device (80) configured to transmit the power of the motor (81) to the fixed frame (42). The power transmission device (80) comprises a worm gear (82) that rotates by the power of the motor (81), and a first gear (100) configured to rotate in connection with the worm gear (82). It further comprises a second gear (200) configured to be connected to the fixed frame (42) and mesh with the first gear (100). The first gear (100) is separable from the second gear (200).

[0119] The fixed frame (42) is positioned on the outside of the rotating frame (41), and the first gear (100) may be detachable from the outside of the rotating frame (41).

[0120] The fixed frame (42) may include a through hole (421) formed so that the first gear (100) passes through the fixed frame (42).

[0121] An electronic device (1) according to one embodiment comprises a fixed frame (42), a rotating frame (41) rotatable with respect to the fixed frame (42), a motor (81) provided on the rotating frame (41), a worm gear (82) that rotates by the power of the motor (81), a rotating shaft (85) that rotates by the worm gear (82), a first gear (100) rotatable by the power of the motor (81) transmitted through the rotating shaft (85), and a second gear (200) provided to mesh with the first gear (100) so that the rotating frame (41) rotates with respect to the fixed frame (42). The rotating frame (41) can rotate with respect to the fixed frame (42) by an external force when the first gear (100) and the second gear (200) are separated.

[0122] The first gear (100) can be arranged so that the rotating shaft (85) moves in an extended direction and is spaced apart from the second gear (200).

[0123] According to the concept of the present disclosure, the first gear can be separated from the second gear without separating the rotating frame and the fixed frame. Accordingly, the rotating frame can rotate relative to the fixed frame regardless of the power transmission direction of the power transmission device.

[0124] According to the concept of the present disclosure, the electronic device may include a structure in which the meshing of the first gear and the second gear can be disengaged. Accordingly, the electronic device may effectively transmit power by including a power transmission assembly with a large reduction ratio.

[0125] According to the concept of the present disclosure, the product can be disassembled even if a failure occurs in the worm gear and / or motor.

[0126] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs.

[0127] Specific embodiments have been illustrated and described above. However, the invention is not limited to the embodiments described above, and those skilled in the art may make various modifications without departing from the essence of the technical concept of the invention as described in the following claims.

Claims

1. Fixed frame; A rotatable frame rotatable with respect to the above fixed frame; A motor provided to provide power for rotating the above-mentioned rotating frame; A rotating shaft arranged to be rotated by the above motor; A first gear detachably coupled to the rotating shaft and rotatable by the power of the motor transmitted through the rotating shaft; A second gear provided to mesh with the first gear so that the rotating frame rotates relative to the fixed frame; The first gear is provided to be disengaged from the second gear, and The above-described rotating frame is an electronic device capable of rotating relative to the above-described fixed frame by an external force when the above-described first gear and the above-described second gear are disengaged.

2. In Paragraph 1, A worm wheel coupled to the above-mentioned rotating shaft; and An electronic device further comprising a worm arranged to rotate the worm wheel and transmit rotation to the rotating shaft, and meshing with the worm wheel.

3. In Paragraph 2, The above worm is an electronic device configured to rotate around the drive shaft of the above motor.

4. In Paragraph 3, An electronic device in which the direction in which the above drive shaft is extended intersects the direction in which the above rotation shaft is extended.

5. In Paragraph 1, The first gear is an electronic device separable from the rotating shaft and the teeth of the first gear in the direction in which they extend.

6. In Paragraph 5, The above first gear is an electronic device including a spur gear.

7. In Paragraph 1, The above fixed frame is an electronic device comprising a through hole formed so that the first gear penetrates the fixed frame.

8. In Paragraph 7, An electronic device further comprising a fastening member for connecting the first gear and the rotating shaft.

9. In Paragraph 8, The above-mentioned fastening member is an electronic device configured to be separable from the first gear through the above-mentioned through hole.

10. In Paragraph 9, The above through hole is an electronic device arranged so that the first gear can move in the direction in which the rotating shaft extends and penetrate the fixed frame.

11. In Paragraph 1, An electronic device further comprising a base that is coupled to the rotating frame and accommodates the motor.

12. In Paragraph 11, The above-mentioned rotating frame includes two rotating frames, and each of the rotating frames is an electronic device provided on opposite sides of the base.

13. In Paragraph 12, The above fixed frame includes two fixed frames, and each of the fixed frames is an electronic device provided on the outer side of each of the rotating frames.

14. In Paragraph 13, The first gear is an electronic device movable to the outside of one of the two rotating frames.

15. In Paragraph 1, It further includes a bearing that passes through the rotating frame and the fixed frame to connect the rotating frame and the fixed frame, and The above-mentioned rotating frame is an electronic device that rotates around the bearing.

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