A VR treadmill base

Abstract

A VR treadmill base, belonging to the field of virtual reality technology, includes an outer shell, a cylinder, an annular base and a variable magnetic attraction mechanism, wherein the outer shell is enclosed by a circular upper cover plate, a side panel and a circular bottom plate, through holes are evenly opened on the circular upper cover plate, and the side panel is connected to the annular base through the cylinder; the variable magnetic attraction mechanism includes an annular permanent magnet, an energized solenoid, a circular metal ball and a bracket, the bottom of the bracket is fixed on the circular bottom plate, and an arc groove is arranged on the upper part; the circular metal ball is rotatably seated in the arc groove, and a part of the circular metal ball is exposed to the outer shell through a through hole opened on the circular upper cover plate; the energized solenoid is arranged outside the circular metal ball, the inner diameter of the energized solenoid is larger than the diameter of the circular metal ball, and the bottom of the energized solenoid is fixed on the bracket; the annular permanent magnet is fixed in the energized solenoid. The present invention overcomes the shortcomings of the existing VR treadmill base that cannot realize variable resistance and single motion plane.

Description

Technical Field

[0001] The invention belongs to the technical field of virtual reality, and more specifically, relates to a VR treadmill base. Background Art

[0002] Virtual Reality (VR) is a three-dimensional virtual world created by computer simulation, which provides users with simulation of vision and other senses, making users feel as if they are in the scene and can observe things in the three-dimensional space instantly and without restrictions. As a VR supporting peripheral device, the VR treadmill can be directly converted into various modes of movement of users in the virtual space, such as walking, running, etc., which can effectively expand and enhance the immersive experience brought by the VR device, and at the same time, the player also exercises the body. Common VR treadmills include a VR treadmill base with a tread surface and a fixing device for fixing the waist of the experiencer; the existing VR treadmill bases are commonly equipped with matching shoes before using the VR treadmill, and the shoes are equipped with motion sensors, so that players can control the movement of the character through footsteps, or the existing VR treadmill base uses a universal ball to achieve multi-directional movement of the player. However, the existing VR treadmill base has the following limitations. First, it is necessary to wear matching shoes before experiencing the VR scene, and to achieve the effect of controlling movement by generating sliding friction with the VR treadmill base. Not only does it require the use of specified shoes, but the sliding friction is very different from the normal walking experience. In addition, players need to drag and change shoes in public places, which also limits the promotion experience in public places. Second, the replacement cost of equipment wear is high. Third, there is no variable resistance during the experience, and the walking experience cannot be changed according to different scenes. Fourth, there is only movement in a single plane, and multi-degree-of-freedom experience such as ups and downslopes, falling, etc. cannot be achieved. Summary of the invention

[0003] The purpose of the present invention is to provide a VR treadmill base to overcome the shortcomings of the existing VR treadmill base that cannot achieve variable resistance and a single motion plane.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a VR treadmill base, characterized in that it includes: an outer shell, a cylinder, an annular base and a variable magnetic attraction mechanism, the outer shell is surrounded by a circular upper cover plate, a side panel and a circular bottom plate, the circular upper cover plate is evenly provided with through holes, and the side panel is connected to the annular base through the cylinder; the number of the cylinders is at least three, and at least three cylinders are evenly distributed along the circumference of the annular base, the piston rod end of the cylinder is hinged to the side panel, and the cylinder barrel end of the cylinder is hinged to the annular base; the variable magnetic attraction mechanism is located inside the outer shell, and the number of the variable magnetic attraction mechanism is consistent with the number of through holes opened on the circular upper cover plate, and they correspond one to one. The variable magnetic attraction mechanism includes an annular permanent magnet, an energized solenoid, a circular metal ball and a bracket, the bottom of the bracket is fixed on the circular bottom plate, and an arc groove is arranged on the upper part of the bracket; the circular metal ball is a hollow circular metal ball, the circular metal ball is rotatably seated in the arc groove, and a part of the circular metal ball is exposed to the outer shell through a through hole opened on the circular upper cover plate; the energized solenoid is arranged outside the circular metal ball, the inner diameter of the energized solenoid is larger than the diameter of the circular metal ball, the bottom of the energized solenoid is fixed on the bracket, and the energized solenoid is electrically connected to the external power supply; the annular permanent magnet is coaxially arranged with the energized solenoid and fixed inside the energized solenoid.

[0005] Furthermore, the height of the portion of the circular metal ball exposed from the surface of the circular upper cover plate is 2 mm to 3 mm.

[0006] Furthermore, the surface of the round metal ball is sprayed with a wear-resistant coating.

[0007] As a preferred embodiment of the present invention, the stent is a metal stent.

[0008] Furthermore, the magnetic field direction of the annular permanent magnet is consistent with the magnetic field direction inside the energized solenoid.

[0009] Through the above design scheme, the present invention can bring the following beneficial effects:

[0010] 1. The VR treadmill base designed by the present invention realizes the convenient and quick VR experience without the need for additional shoes, reduces the difficulty of promoting the VR experience, provides a broader platform for the design of VR games, and makes the games more diversified.

[0011] 2. The VR treadmill base designed by the present invention realizes the walking resistance simulation and falling feeling simulation experience that traditional VR devices cannot bring to users, and provides more interactive feelings between games and players.

[0012] 3. The present invention utilizes basic physical principles and a simple mechanical structure to improve the reliability of the entire device, facilitate maintenance, and has good social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to understand the present invention and do not constitute improper limitations of the present invention. In the drawings:

[0014] Figure 1 This is a structural diagram of the entire VR treadmill base;

[0015] Figure 2 This is a partial enlarged picture of the VR treadmill base;

[0016] Figure 3 It is a front view of the variable magnetic attraction mechanism;

[0017] Figure 4 A view of multiple variable magnetic attraction mechanisms arranged together for installation.

[0018] The marks in the figure are as follows: 1-circular upper cover plate; 2-side panel; 3-circular bottom plate; 4-cylinder; 5-annular base; 6-annular permanent magnet; 7-energized solenoid; 8-circular metal ball; 9-bracket. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the present invention discloses a VR treadmill base, including an outer shell, a cylinder 4, an annular base 5 and a variable magnetic attraction mechanism, the outer shell is enclosed by a circular upper cover plate 1, a side panel 2 and a circular bottom plate 3, the circular upper cover plate 1 serves as the tread surface of the VR treadmill base, through holes are evenly opened on the circular upper cover plate 1, and the side panel 2 is connected to the annular base 5 through the cylinder 4; the number of the cylinders 4 is at least three, and at least three cylinders 4 are evenly distributed along the circumference of the annular base 5, the piston rod end of the cylinder 4 is hinged to the side panel 2, and the cylinder barrel end of the cylinder 4 is hinged to the annular base 5, and the cylinder 4 is used to support the outer shell and control the state of the outer shell, such as controlling the outer shell to be in a horizontal state or an inclined state; the variable magnetic attraction mechanism is located inside the outer shell, and the number of the variable magnetic attraction mechanism is equal to the number of through holes opened on the circular upper cover plate 1. The number is consistent and one-to-one corresponding. The variable magnetic attraction mechanism includes an annular permanent magnet 6, an energized solenoid 7, a round metal ball 8 and a bracket 9. The bottom of the bracket 9 is fixed on the circular bottom plate 3, and the upper part of the bracket 9 is provided with an arc groove; the round metal ball 8 is a hollow round metal ball, and the round metal ball 8 is rotatably seated in the arc groove. A part of the round metal ball 8 is exposed to the outer shell through a through hole provided on the circular upper cover plate 1. Preferably, the height of the part of the round metal ball 8 exposed from the surface of the circular upper cover plate 1 is 2mm to 3mm. Because the elevated range is too large, the cross-sectional diameter of the round metal ball 8 corresponding to the mouth of the energized solenoid 7 is also larger. At this time, the inner diameter of the annular permanent magnet 6 needs to be increased. When the inner diameter of the annular permanent magnet 6 is increased while the outer diameter remains unchanged, the volume of the annular permanent magnet 6 is compressed and the magnetic attraction is reduced. When the user steps on the VR treadmill base, the sole of the foot is in direct contact with the round metal ball 8, and the round upper cover plate 1 mainly serves as an insulator and assists in supporting the user; the energized solenoid 7 is arranged outside the round metal ball 8, the inner diameter of the energized solenoid 7 is larger than the diameter of the round metal ball 8, the bottom of the energized solenoid 7 is fixed on the bracket 9, and the energized solenoid 7 is electrically connected to the external power supply; the annular permanent magnet 6 is coaxially arranged with the energized solenoid 7 and fixed inside the energized solenoid 7, and the magnetic field direction of the annular permanent magnet 6 is consistent with the magnetic field direction inside the energized solenoid 7.

[0021] Furthermore, the circular upper cover plate 1 is made of a non-conductive material, such as ceramics, polymethacrylate, or a low-conductivity material combined with an insulating material such as aluminum alloy covered with insulating rubber.

[0022] Furthermore, the annular permanent magnet 6 may be a common permanent magnet or a pre-magnetized material to adjust the magnetic field strength.

[0023] Furthermore, the round metal ball 8 is made of a strong magnetic metal so that it can be subjected to a greater suction force; such as samarium cobalt and ferrite;

[0024] Furthermore, the surface of the round metal ball 8 is sprayed with a wear-resistant coating or strengthened to extend its service life. The material of the wear-resistant coating is alumina ceramic spray abrasive, KN1000 wear-resistant coating and KN-VS wear-resistant coating. The strengthening treatment is to add alloy elements such as chromium and manganese to the strong magnetic material to improve the wear resistance of the metal.

[0025] Because there is heat generated by the contact friction between the energized solenoid 7 and the round metal ball 8 inside the VR treadmill base, considering issues such as strength and thermal conductivity, the bracket 9 in the present invention, which serves as a support for the round metal ball 8, is preferably made of metal, such as cast iron, aluminum alloy, etc.

[0026] Furthermore, the contact portion between the bracket 9 and the round metal ball 8 can be made of detachable precious metals, such as silver-copper alloy, silver-magnesium alloy, silver-nickel alloy, etc., to reduce friction resistance and manufacturing costs.

[0027] The bracket 9 is made of cheap cast iron to form the bracket body and the contact part of precious metal.

[0028] Specifically, the working principle of the present invention is as follows:

[0029] The VR treadmill base proposed by the present invention is placed indoors, and the user stands on the VR treadmill base. The sole of the shoe contacts the part of the round metal ball 8 that is higher than the round upper cover plate 1, and the round metal ball 8 is subjected to a downward force. When the device starts to run, the round metal ball 8 is attracted by the annular permanent magnet 6 and the energized solenoid 7, and the pressure equivalent to the bracket 9 is much smaller than the pressure applied to the round metal ball 8 by the user before the device is powered on. When the user starts to exercise, the sole of the shoe and the round metal ball 8 produce relative motion, so that the user can walk, jump and other movements in situ. The current size of the external power supply passing into the energized solenoid 7 is adjusted to change the attraction of the round metal ball 8, and then change the rolling force that the user needs to apply to the round metal ball 8, so as to achieve the feeling of variable resistance movement; the amount of expansion and contraction of the cylinder 4 is changed to achieve the tilt of the entire motion platform, that is, the tilt of the outer shell, to simulate the scene in the game.

[0030] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A VR treadmill base, characterized in that: include: An outer shell, a cylinder (4), an annular base (5) and a variable magnetic attraction mechanism, wherein the outer shell is enclosed by a circular upper cover plate (1), a side panel (2) and a circular bottom plate (3), the circular upper cover plate (1) is evenly provided with through holes, the side panel (2) is connected to the annular base (5) through the cylinder (4); the number of the cylinders (4) is at least three, at least three cylinders (4) are evenly distributed along the circumference of the annular base (5), the piston rod end of the cylinder (4) is hinged to the side panel (2), and the cylinder (4) The end of the cylinder is hinged to the annular base (5); the variable magnetic attraction mechanism is located inside the outer shell; the number of the variable magnetic attraction mechanism is consistent with the number of through holes opened on the circular upper cover plate (1), and they correspond one to one; the variable magnetic attraction mechanism comprises an annular permanent magnet (6), an energized solenoid (7), a circular metal ball (8) and a bracket (9); the bottom of the bracket (9) is fixed on the circular bottom plate (3); the upper part of the bracket (9) is provided with an arc groove; the circular metal ball (8) is a hollow circular metal ball, The circular metal ball (8) is rotatably seated in the circular arc groove. The circular metal ball (8) is always in contact with the circular arc groove. The resistance generated by the rotation is the friction between the metal ball (8) and the circular arc groove. The energized solenoid (7) generates an electromagnetic support force on the metal ball (8). The friction force is equal to the difference between the pressure of the metal ball (8) and the electromagnetic support force multiplied by the friction coefficient. The friction coefficient is the friction between the metal ball (8) and the circular arc groove. The invention relates to a circular metal ball (8) having a friction coefficient, wherein a portion of the circular metal ball (8) is exposed to the outer shell through a through hole formed on the circular upper cover plate (1); the energized solenoid (7) is arranged outside the circular metal ball (8); the inner diameter of the energized solenoid (7) is larger than the diameter of the circular metal ball (8); the bottom of the energized solenoid (7) is fixed on a bracket (9); and the energized solenoid (7) is electrically connected to an external power supply; and the annular permanent magnet (6) is coaxially arranged with the energized solenoid (7) and fixed inside the energized solenoid (7).

2. The VR treadmill base according to claim 1, characterized in that: The height of the portion of the circular metal ball (8) exposed from the surface of the circular upper cover plate (1) is 2 mm to 3 mm.

3. The VR treadmill base according to claim 1, characterized in that: The surface of the round metal ball (8) is sprayed with a wear-resistant coating.

4. The VR treadmill base according to claim 1, characterized in that: The bracket (9) is a metal bracket.

5. The VR treadmill base according to claim 1, characterized in that: The direction of the magnetic field of the annular permanent magnet (6) is consistent with the direction of the magnetic field inside the energized solenoid (7).

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