VR motion platform device

Abstract

The present invention relates to a VR motion platform device, and more specifically, to a VR motion platform device that enables a user to have an immersive experience in a virtual reality environment by performing 3-axis rotational movement precisely and efficiently while supporting the user's weight. According to an embodiment of the present invention, a VR motion platform device is provided, comprising: a load-supporting plate that supports a predetermined load while in contact with the ground; a rotating plate having a predetermined area that is provided on the upper side of the load-supporting plate and rotates in a direction parallel to the ground around a central axis, and a pair of first guide portions provided on the upper side of the rotating plate; an X-axis driving unit that has a length in the X-axis direction and is formed in an arc shape and is capable of sliding movement while connected to the first guide portion, and a second guide portion provided on the upper side of the center of the X-axis frame; and a Y-axis driving unit that has a length in the Y-axis direction and is formed in an arc shape and is capable of sliding movement while connected to the second guide portion, and a plate-shaped seat fixing plate connected to the upper side of the Y-axis frame.

Description

Technology Field

[0001] The present invention relates to a VR motion platform device, and more specifically, to a VR motion platform device that enables a user to have an immersive experience in a virtual reality environment by performing 3-axis rotational movement precisely and efficiently while supporting the user's weight. Background Technology

[0002] Recently, with the advancement of virtual reality (VR) technology, various hardware devices are being developed to provide users with an immersive experience.

[0003] Among them, the VR motion platform is a device that enables users to realistically experience movement in a virtual environment, and it is an important technology that can provide users with a higher level of immersion.

[0004] Conventional VR motion platforms are designed to respond appropriately to the user's movements, but most VR motion platforms have limitations in the sense of immersion experienced by the user due to restricted range of motion or structures that are difficult to control.

[0005] Furthermore, the reality is that it lacks user-friendliness due to the cumbersome installation and adjustment caused by its complex mechanism.

[0006] Therefore, there is a need for a VR motion platform capable of responding to user movements more precisely and efficiently.

[0007] As a background technology for an invention related thereto, Korean Registered Patent Publication No. 10-2149609 (surfing simulation device and system) has been disclosed.

[0008] The disclosed surfing simulation device and system comprises: a base that supports a predetermined load by contacting the ground; three or more motors provided to be accommodated inside the base; a motor box connected to each rotation axis of the motor and having a gear shifting or coupler function; a contact wheel connected to the motor box and rotatable in both directions according to the rotation of the motor; a board support means that contacts the contact wheel and rotatable about a virtual center point according to the rotation of the motor; a board coupled to the board support means and rotatable in three axes and functioning as a user's footrest; and a control unit connected to the motor and motor box to supply power to and control the motor and motor box; wherein the base comprises a polygonal frame and a frame cover that accommodates the frame; A surfing simulation device is configured to include: a handle coupling hole provided on the outer side of the frame, a motor or motor box coupled to the inner side of the frame, and the frame cover accommodating the motor, motor box, and contact wheel, wherein a predetermined circular or elliptical hole is formed on the upper side so that the contact wheel and the board support means can come into contact, and a handle formed extending from the ground to the height of a user’s waist or armpit while riding on the board is coupled to the handle coupling hole. The problem to be solved

[0009] The problem that the present invention aims to solve is to provide a VR motion platform device capable of performing precise movement and rotational motion in three axes and stably supporting physical loads in order to solve the conventional problems described above.

[0010] The technical problems to be solved by the present invention 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 the present invention belongs from the description below. means of solving the problem

[0011] The VR motion platform device of the present invention, as a means of solving the problem for achieving the above objective, comprises: a load-supporting plate that supports a predetermined load while in contact with the ground; a Z-axis driving unit that includes a rotating plate of a predetermined area provided on the upper side of the load-supporting plate and rotates in a direction parallel to the ground around a central axis, and a pair of first guide parts provided on the upper side of the rotating plate; an X-axis driving unit that includes an X-axis frame formed in an arc shape having a length in the X-axis direction and capable of sliding movement while connected to the first guide part, and a second guide part provided on the upper side of the center of the X-axis frame; and a Y-axis driving unit that includes a Y-axis frame formed in an arc shape having a length in the Y-axis direction and capable of sliding movement while connected to the second guide part, and a plate-shaped seat fixing plate connected to the upper side of the Y-axis frame.

[0012] Additionally, the above Z-axis drive unit comprises: a support frame that is connected to the upper side of the load support plate and is formed in a plate shape with a circular groove formed in the center; a rotating frame that is connected to the upper side of the support frame and is rotatably configured, with a gear tooth formed on the inner side; a first motor that is connected to the upper side of the rotating plate and provides power by a gear provided on one side meshing with the inner gear tooth of the rotating frame; a second motor that is connected to the upper side of the rotating plate and provides power to the X-axis frame through a gear provided on one side; and a first rotating roller member that is connected to the upper side of the first guide unit and is rotatable in both directions while supporting the lower end of the X-axis frame.

[0013] A VR motion platform device is provided, characterized by comprising: a gear tooth formed on the lower side of the X-axis frame that meshes with the gear of the second motor, and an X-axis guide groove formed on both sides of the X-axis frame to allow sliding movement while supported by the first rotating roller member; a third motor provided on the upper side of the X-axis frame and providing power to the Y-axis frame through a gear provided on one side; and a second rotating roller member provided on the upper side of the second guide member and capable of rotating in both directions while supporting the lower end of the Y-axis frame.

[0014] In addition, a VR motion platform device is provided, characterized in that a gear tooth is formed on the upper side of the Y-axis frame to mesh with the gear of the third motor, and a Y-axis guide groove is formed on both sides of the Y-axis frame to enable sliding movement while supported by the second rotating roller member.

[0015] In addition, a stand portion is provided on the upper side of the seat fixing plate so that a user can sit on it, and the stand portion comprises: a seat portion formed in the shape of a chair and fastened to the upper side of the seat fixing plate; a footrest portion fastened to the front side of the seat fixing plate and serving as a footrest; and a handle portion fastened to both sides of the seat fixing plate; and the first to third motors are controlled simultaneously so that the stand portion can rotate in three axes, thereby providing a VR motion platform device.

[0016] Additionally, a board portion functioning as a user's footrest is provided on the upper side of the seat fixing plate, and the board portion comprises: a board portion formed in a board shape and fastened to the upper side of the seat fixing plate; a pad portion coupled to the upper surface of the board portion to absorb shock transmitted from the user; and a handle portion fastened to both sides of the seat fixing plate; and the stand portion is capable of rotating in three axes by simultaneously controlling the first to third motors. Effects of the invention

[0017] The VR motion platform device of the present invention, as described above, enables independent yet precise control in the X-axis, Y-axis, and Z-axis directions, allowing the user to realistically experience physical movement in virtual reality.

[0018] In addition, since the drive units of the X, Y, and Z axes are interconnected, the mechanical drive components operate harmoniously, resulting in high durability and maintaining stability even during prolonged use.

[0019] And the effects obtainable from the present invention 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 invention belongs from the description below. Brief explanation of the drawing

[0020] FIG. 1 is a drawing showing a VR motion platform device according to an embodiment of the present invention. FIGS. 2 and 3 are drawings showing the Z-axis driving unit of a VR motion platform device according to an embodiment of the present invention. FIGS. 4 and 5 are drawings showing the X-axis driving unit of a VR motion platform device according to an embodiment of the present invention. FIG. 6 is a diagram showing the Y-axis driving unit of a VR motion platform device according to an embodiment of the present invention. FIG. 7 is a drawing showing a stand part combined with a VR motion platform device according to an embodiment of the present invention. Specific details for implementing the invention

[0021] Hereinafter, various embodiments of this document are described with reference to the accompanying drawings. However, this is not intended to limit the technology described in this document to specific embodiments and should be understood to include various modifications, equivalents, and / or alternatives to the embodiments of this document. In relation to the description of the drawings, similar reference numerals may be used for similar components.

[0022] In this document, expressions such as "have," "can have," "include," or "can include" refer to the existence of the relevant feature (e.g., numerical values, functions, actions, or components, etc.) and do not exclude the existence of additional features.

[0023] In this document, expressions such as “A or B,” “at least one of A or / and B,” or “one or more of A or / and B” may include all possible combinations of items listed together. For example, “A or B,” “at least one of A and B,” or “at least one of A or B” may refer to cases including (1) at least one A, (2) at least one B, or (3) both at least one A and at least one B.

[0024] The terms used in this document are used merely to describe specific embodiments and are not intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art described in this document. Terms used in this document that are defined in general dictionaries may be interpreted as having the same or similar meaning as they have in the context of the relevant technology, and are not to be interpreted in an ideal or overly formal sense unless explicitly defined in this document. In some cases, even terms defined in this document may not be interpreted to exclude the embodiments of this document.

[0025] It is understood that various modifications can be made by those skilled in the art without departing from the essence of the invention as claimed in the claims of the present invention, and such modifications should not be understood individually from the technical spirit or perspective of the present invention.

[0026] According to an embodiment of the present invention, a load support plate (1) that supports a predetermined load while in contact with the ground; a Z-axis drive unit (10) that includes a rotating plate (110) of a predetermined area provided on the upper side of the load support plate (1) and rotates in a direction parallel to the ground around a central axis, and a pair of first guide parts (150) provided on the upper side of the rotating plate (110); and an X-axis drive unit (20) that includes an X-axis frame (200) that has a length in the X-axis direction and is formed in an arc shape and is capable of sliding movement while connected to the first guide part (150), and a second guide part (220) provided on the upper side of the center of the X-axis frame (200). A VR motion platform device is provided, characterized by comprising: a Y-axis frame (300) having a length in the Y-axis direction and formed in an arc shape, capable of sliding movement while connected to the second guide part (220); and a Y-axis drive part (30) including a plate-shaped seat fixing plate (310) connected to the upper part of the Y-axis frame (300).

[0027] The VR motion platform device of the present invention may be configured to include a load support plate (1), a Z-axis drive unit (10), an X-axis drive unit (20), and a Y-axis drive unit (30).

[0028] The load support plate (1) above is a foundation structure that supports the overall weight of the device and can be configured to support a predetermined load while in contact with the floor surface.

[0029] The load-bearing plate (1) is preferably made of a material with high rigidity (e.g., steel or aluminum alloy, etc.), and additional supporting legs may be installed to enable stable mounting.

[0030] The rotating plate (110) of the Z-axis drive unit (10) can be formed in the shape of a disc with a predetermined area, and can rotate 360 ​​degrees in both directions parallel to the ground through the rotating frame (140) and the first motor (120) to be described later.

[0031] A pair of first guide members (150) may be provided on the upper side of the rotating plate (110), and when an X-axis frame (200) connected to the upper side of the first guide member (150) slides in the X-axis direction, the first guide member (150) may be guided to move within a predetermined range.

[0032] The X-axis frame (200) of the X-axis drive unit (20) can be formed in the shape of an arc of a predetermined length, and the X-axis frame (200) can slide in the arc direction while connected to the first guide unit (150).

[0033] A second guide part (220) capable of performing the same function as the first guide part (150) may be provided on the upper side of the X-axis frame (200), and when the Y-axis frame (300) connected to the upper side of the second guide part (220) slides in the Y-axis direction, it may be guided to move within a predetermined range of the second guide part (220).

[0034] The above sheet fixing plate (310) can be connected to both upper ends of the Y-axis frame (300), and a stand part (400) or a board part (not shown), which will be described later, can be provided on the upper side of the above sheet fixing plate (310).

[0035] As described above, the X-axis drive unit (20), the Y-axis drive unit (30), and the Z-axis drive unit (10) can each independently perform movement in the X, Y, and Z axes, and through such movement, the VR motion platform device of the present invention can perform various movements within a predetermined range.

[0036] Additionally, the above Z-axis drive unit (10) comprises: a support frame (100) which is connected to the upper side of the load support plate (1) and is formed in a plate shape with a circular groove formed in the center; a rotating frame (140) which is connected to the upper side of the support frame (100) and is rotatably configured, with a gear tooth formed on the inner side; a first motor (120) which is connected to the upper side of the rotating plate (110) and has a gear on one side meshing with the inner gear tooth of the rotating frame (140) to provide power; a second motor (130) which is connected to the upper side of the rotating plate (110) and provides power to the X-axis frame (200) through a gear on one side; and a first rotating roller member which is connected to the upper side of the first guide unit (150) and is rotatable in both directions while supporting the lower end of the X-axis frame (200).

[0037] The above Z-axis drive unit (10) may be configured to include a support frame (100), a rotating frame (140), a first motor (120), a second motor (130), and a first rotating roller member.

[0038] The support frame (100) is a plate-shaped member that fixes the Z-axis drive unit (10) so that it can be fastened to the upper side of the load support plate (1), and a circular groove of the same size as the inner diameter of the rotation frame (140) may be formed in the central part.

[0039] The above-mentioned rotating frame (140) may be positioned on the upper side of the support frame (100) and may be configured to rotate while connected to the rotating plate (110).

[0040] Gear teeth may be formed on the inner surface of the above-mentioned rotating frame (140).

[0041] A first motor (120) and a second motor (130) that provide power can be connected to the upper side of the above-mentioned rotating plate (110).

[0042] The first motor (120) may have a main body that generates power attached to the upper side of the rotating plate (110), and the other end extending to the lower part of the main body may be positioned by passing through a through hole formed in the rotating plate (110). At this time, a first gear is provided on the other end of the first motor (120) that passes through the through hole, and power can be transmitted in a state of meshing with the gear teeth on the inner surface of the rotating frame (140).

[0043] The second motor (130) may have a main body that generates power connected to the upper side of the rotating plate (110) like the first motor (120), and a second gear (121) that rotates around a Y-axis provided on the other side may be positioned on the upper side of the center of the rotating plate (110).

[0044] The second gear (121) can provide power to enable the X-axis frame (200) to slide in an arc direction, and details will be described later.

[0045] A first rotating roller member capable of rotating in both directions may be provided on the upper side of the above pair of first guide members (150), and the first rotating roller member may rotate while supporting the X-axis frame (200) and the X-axis guide groove (201) to be described later.

[0046] On the upper side of each of the first guide sections (150), a pair of first lower support rollers (151) that rotate while supporting the lower surface of the X-axis frame (200) and six second side support rollers (222) that rotate while supporting the side and upper / lower parts inside the X-axis guide groove (201) may be provided, and each side support roller may be arranged to rotate and support in a direction horizontal to the ground or a direction vertical to the ground depending on the load and shape of the X-axis frame (200).

[0047] A VR motion platform device is provided, characterized by comprising: a gear tooth formed on the lower side of the X-axis frame (200) that meshes with the gear of the second motor (130); an X-axis guide groove (201) formed on both sides of the X-axis frame (200) so as to allow sliding movement while supported by the first rotating roller member; a third motor (210) provided on the upper side of the X-axis frame (200) and providing power to the Y-axis frame (300) through a gear provided on one side; and a second rotating roller member provided on the upper side of the second guide part (220) and capable of rotating in both directions while supporting the lower end of the Y-axis frame (300).

[0048] The above X-axis frame (200) may be configured to include a third motor (210) and a second rotating roller part.

[0049] On the lower side of the X-axis frame (200), gear teeth that mesh with the gear of the second motor (130) along the longitudinal direction may be formed, and on both sides of the X-axis frame (200), X-axis guide grooves (201) may be formed.

[0050] As described above, when the X-axis frame (200) slides in an arc direction, the side support roller of the first rotating roller member can rotate while supporting the upper and lower parts and the side of the X-axis guide groove (201).

[0051] The above third motor (210) may have a main body that generates power attached to the upper side of the X-axis frame (200), and a third gear (211) that rotates around the X-axis on the other side may be provided and positioned on the upper side of the center of the X-axis frame (200).

[0052] A second rotating roller member capable of rotating in both directions may be provided on the upper side of the second guide part (220), and the second rotating roller member may be composed of three second lower support rollers (221) that rotate while supporting the lower surface of the Y-axis frame (300), and eight second side support rollers (222) that rotate while supporting the lower part and side of the Y-axis guide groove (301) to be described later.

[0053] The second side support roller (222) can rotate while supporting the Y-axis guide groove (301) in a direction horizontal to the ground or vertical to the ground, just like the first side support roller (152).

[0054] In addition, a VR motion platform device is provided, characterized in that a gear tooth is formed on the upper side of the Y-axis frame (300) to mesh with the gear of the third motor (210), and a Y-axis guide groove (301) is formed on both sides of the Y-axis frame (300) so as to allow sliding movement while supported by the second rotating roller member.

[0055] The third gear (211) of the third motor (210) included in the X-axis drive unit (20) can mesh with the gear teeth of the Y-axis frame (300) to transmit power to the Y-axis frame (300), thereby allowing the Y-axis frame (300) to slide in the Y-axis arc direction.

[0056] At this time, the Y-axis frame (300) can slide at the same position without going beyond a predetermined range through the second side support roller (222) supporting the Y-axis guide groove (301) and the second lower support roller (221) supporting the lower surface of the Y-axis frame (300).

[0057] And, a stand portion (400) is provided on the upper side of the seat fixing plate (310) so that a user can sit on it, and the stand portion (400) includes: a seat portion (410) formed in the shape of a chair and fastened to the upper side of the seat fixing plate (310); a footrest portion (420) fastened to the front side of the seat fixing plate (310) and serving as a footrest; and a handle portion (430) fastened to both sides of the seat fixing plate (310); and the stand portion (400) is capable of rotating in three axes by simultaneously controlling the first to third motors. A VR motion platform device is provided.

[0058] The seat portion (410) may be formed in the shape of a chair so that a user can sit comfortably. The seat portion (410) is fastened to the upper side of the seat fixing plate (310), and it is preferable that the seat portion (410) be fastened so that it can move forward and backward from the upper side and allow for vertical height adjustment, so that the user can settle in a comfortable position and posture.

[0059] The footrest (420) is attached to the front of the seat fixing plate (310) and can serve to support the user's foot.

[0060] The above footrest (420) may be provided to allow the user to fix their feet during a VR experience, and may be designed to allow the size and height of the footrest to be adjusted for safety.

[0061] The handle portion (430) is fastened to both sides of the seat fixing plate (310) and can serve as a handle so that the user can hold it with their hands to support their body during the VR experience.

[0062] It is preferable that the handle portion (430) be detachably connected to the seat fixing plate (310) so that it can be changed to a handle shape suitable for the type of VR the user intends to experience.

[0063] Additionally, a board portion is provided on the upper side of the seat fixing plate (310) to function as a user's footrest, and the board portion comprises: a board portion formed in a board shape and fastened to the upper side of the seat fixing plate (310); a pad portion coupled to the upper surface of the board portion to absorb shock transmitted from the user; and a handle portion (430) fastened to both sides of the seat fixing plate (310); and the stand portion (400) is capable of rotating in three axes by simultaneously controlling the first to third motors.

[0064] The board portion can be formed in a flat board shape and fastened to the upper side of the seat fixing plate (310). At this time, the board portion can be made of a material having sufficient strength and durability, and it is preferable that it be made with a sufficient width so that a user can place their foot on it.

[0065] The surface of the above board can be treated with an anti-slip finish so that the user does not slip while standing on it.

[0066] The above pad portion may be configured to be provided on the upper surface of the above board portion to absorb shock transmitted by the user's movement.

[0067] The above-mentioned pad portion is preferably composed of a high-elasticity material to effectively absorb shocks generated while the user is experiencing VR, and is configured to be easily replaceable as needed.

[0068] The handle portion (430) may be configured to extend up to the user's waist height while being fastened to both sides of the seat fixing plate (310). At this time, since a situation may occur where the user loses balance and falls during the VR experience, it is desirable to wrap the surface of the handle portion (430) with a shock-absorbing material such as a sponge.

[0069] In addition, a control unit may be provided to control the X-axis drive unit (20), Y-axis drive unit (30), and Z-axis drive unit (10), and by the control unit individually controlling the first motor (120) to the third motor (210), the VR motion platform device can move harmoniously in various directions.

[0070] The VR motion platform device of the present invention may be equipped with various sensors, such as position sensors, rotation sensors, and acceleration sensors, to detect the movement of a user or device in real time and transmit the measured data to a control unit to dynamically control the operation of each driving unit.

[0071] Through the configuration of the above sensor, the control unit can control the adjustment of vibration and rotation speed according to changes in the user's footrest position or rotation direction.

[0072] The foregoing description has broadly detailed the features and technical advantages of the present invention to better facilitate a better understanding of the claims of the invention to be described below. Those skilled in the art will understand that the present invention may be implemented in other specific forms without altering its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the claims and their equivalents should be interpreted as being included within the scope of the present invention.

[0073] Although the present invention has been described in detail through specific embodiments, the present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art within the scope of the technical concept of the present invention. Explanation of the symbols

[0074] 1 : Load support plate 10 : Z-axis drive unit 20 : X-axis drive unit 30 : Y-axis drive unit 100 : Support frame 110 : Rotating plate 120 : 1st motor 121 : 2nd gear 130 : Second motor 140 : Rotating frame 150 : First guide section 151 : First lower support roller 152: First side support roller 200: X-axis frame 201 : X-axis guide groove 210 : 3rd motor 211: 3rd gear 220: 2nd guide part 221: Second lower support roller 222: Second side support roller 300 : Y-axis frame 301 : Y-axis guide groove 310 : Seat fixing plate 400 : Stand part 410 : Seat section 420 : Footrest section 430: Handle part

Claims

Claim 1 A load-bearing plate that supports a predetermined load while in contact with the ground; a Z-axis drive unit comprising a rotating plate of a predetermined area provided on the upper side of the load-bearing plate and rotating in a direction parallel to the ground around a central axis, wherein a pair of first guide portions are provided on the upper side of the rotating plate; an X-axis drive unit comprising an X-axis frame that has a length in the X-axis direction and is formed in an arc shape and is capable of sliding movement while connected to the first guide portion, and a second guide portion provided on the upper side of the center of the X-axis frame; and a Y-axis drive unit comprising a Y-axis frame that has a length in the Y-axis direction and is formed in an arc shape and is capable of sliding movement while connected to the second guide portion, and a plate-shaped seat fixing plate that is connected to the upper side of the Y-axis frame; wherein the Z-axis drive unit comprises: a support frame connected to the upper side of the load-bearing plate and formed in a plate shape with a circular groove formed in the center; and a rotating frame provided on the upper side of the support frame so as to be rotatable while connected to the rotating plate, and having a gear tooth formed on the inner side. A VR motion platform device characterized by comprising: a first motor provided on the upper side of the rotating plate, wherein a gear provided on one side meshes with an inner gear tooth of the rotating frame to provide power; a second motor provided on the upper side of the rotating plate, wherein a gear provided on one side provides power to the X-axis frame; and a first rotating roller member provided on the upper side of the first guide part, wherein the first rotating roller member is capable of rotating in both directions while supporting the lower end of the X-axis frame; wherein a gear tooth that meshes with the gear of the second motor is formed on the lower side of the X-axis frame, and an X-axis guide groove is formed on both sides of the X-axis frame to allow sliding movement while supported by the first rotating roller member; a third motor provided on the upper side of the X-axis frame, wherein a gear provided on one side provides power to the Y-axis frame; and a second rotating roller member provided on the upper side of the second guide part, wherein the second rotating roller member is capable of rotating in both directions while supporting the lower end of the Y-axis frame. Claim 2 A VR motion platform device according to claim 1, characterized in that a gear tooth is formed on the upper side of the Y-axis frame to mesh with the gear of the third motor, and a Y-axis guide groove is formed on both sides of the Y-axis frame to enable sliding movement while supported by the second rotating roller member. Claim 3 A VR motion platform device according to claim 2, wherein a stand portion is provided on the upper side of the seat fixing plate so that a user can sit on it, and the stand portion comprises: a seat portion formed in the shape of a chair and fastened to the upper side of the seat fixing plate; a footrest portion fastened to the front side of the seat fixing plate and serving as a footrest; and a handle portion fastened to both sides of the seat fixing plate; and wherein the stand portion is rotatable in three axes by simultaneously controlling the first to third motors. Claim 4 A VR motion platform device according to claim 3, wherein a board portion functioning as a user's footrest is provided on the upper side of the seat fixing plate, and the board portion comprises: a board portion formed in a board shape and fastened to the upper side of the seat fixing plate; a pad portion coupled to the upper surface of the board portion to absorb shock transmitted from the user; and a handle portion fastened to both sides of the seat fixing plate; and wherein the stand portion is rotatable in three axes by simultaneously controlling the first to third motors. Claim 5 delete Claim 6 delete

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