A portable 3D holographic projection device

Abstract

The present invention discloses a portable 3D holographic projection device, and relates to the field of 3D projection technology. The portable 3D holographic projection device comprises a protective shell, a 3D holographic projector is arranged inside the protective shell, and a crossbeam is fixed at the bottom of the protective shell, and a traveling wheel 1 and a traveling wheel 2 are respectively installed at the left and right ends of the crossbeam, the traveling wheel 1 is rotatably connected to one end of a connecting column, and the other end of the connecting column is slidably connected to the crossbeam, and a driving plate is rotatably installed on the part of the crossbeam located on the right side of the traveling wheel 1. The portable 3D holographic projection device can be rotated by using the right shift of the traveling wheel 1 when it collides with a stone by setting a driving plate, and when the driving plate rotates, the push-off plate can be pushed by a push bar to rotate, and the push-off plate will push the stone on the left side of the traveling wheel 1 away from the traveling wheel 1, thereby preventing the stone from affecting the travel speed of the entire device, and at the same time, it can prevent the device speed from suddenly dropping and causing the internal electronic devices to collide and be damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D projection, and in particular to a portable 3D holographic projection device. Background Art

[0002] 3D holographic projection refers to the use of special instruments to project three-dimensional images. Compared with two-dimensional images, this projection method is more realistic, provides a better viewing experience, and is more in line with human senses.

[0003] The existing portable 3D holographic projection equipment generally directly installs the traveling wheels at the bottom of the 3D holographic projection equipment. For example, the patent with the patent announcement number CN210605550U discloses a new portable 3D holographic interactive table, including a box body, a telescopic drawer is arranged at the front end of the box body, a microcomputer is arranged at the rear end of the box body, a 3D projector is arranged above the microcomputer, and a positioning base station for tracking the position of human eyes and hands to complete the interaction with 3D content is arranged above the telescopic drawer. The microcomputer includes a central processing unit, a memory module, a hard disk module, and a graphics card module. The end is provided with a power interface, which is connected to the 3D projector, microcomputer, and positioning base station through wires. The inside of the telescopic drawer is provided with slots for accommodating 3D glasses, mouse and keyboard, 3D helmet, operating handle, and audio. The new portable 3D holographic interactive table has a novel design, which solves the problem of non-3D content being stereoscopic caused by traditional left-right stereo technology. The 3D holographic interactive table has a simple structure, is easy to carry, does not need to be installed, and can be used immediately after being placed. At the same time, it has accurate positioning, good 3D stereo effect, and is easy to control. It is a good innovative solution with great market promotion prospects. However, when moving on the road, although it has rollers for walking, the rollers will inevitably collide with obstacles such as stones on the road. At this time, the movement of the rollers will be blocked, and the position needs to be readjusted to continue moving, which reduces the speed of travel. At the same time, when the rollers collide with obstacles such as stones, the speed of the interactive table drops sharply, and the 3D glasses, mouse and keyboard, 3D helmet and other electronic devices inside it will move under the action of inertia, so that they will collide with the inside of the interactive table and then be damaged, which has certain defects. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the present invention provides a portable 3D holographic projection device, which solves the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a portable 3D holographic projection device, comprising a protective shell, a 3D holographic projector is arranged inside the protective shell, and a crossbeam is fixed to the bottom of the protective shell, and a traveling wheel 1 and a traveling wheel 2 are respectively installed on the left and right ends of the crossbeam, the traveling wheel 1 is rotatably connected to one end of a connecting column, and the other end of the connecting column is slidably connected to the crossbeam, and a driving plate is rotatably installed on the part of the crossbeam located on the right side of the traveling wheel 1, one side of the driving plate is in contact with the traveling wheel 1, and a pushing bar is fixed on the other side, the pushing bar movably passes through the crossbeam and the end of the pushing bar away from the driving plate is in contact with a pushing-off plate, the pushing-off plate is arc-shaped and one end is hingedly installed on the crossbeam, and the other end of the pushing-off plate is located on the left side of the traveling wheel 1.

[0008] Preferably, a placement cavity is provided on the front and rear sides of the protective shell, a placement device is provided inside the placement cavity, and 3D glasses, a mouse and keyboard, a 3D helmet and an operating handle are stored inside the placement device.

[0009] Preferably, the protective shell is hollow and has an opening on the top, and the top of the protective shell is located at the opening and contacts with the shielding guard plate, the right side of the shielding guard plate is hingedly mounted on the top of the protective shell, and a handrail is fixed to the top of the right side of the shielding guard plate, and the handrail is perpendicular to the shielding guard plate.

[0010] Preferably, an L-shaped guide rail is fixed inside the protective shell, the left side of the L-shaped guide rail is slidably connected to a slider, and the slider is rotatably connected to the 3D holographic projector.

[0011] Preferably, an auxiliary stabilization device is provided on the connecting column, and the auxiliary stabilization device includes a linkage rod and a fitting positioning block, one end of the linkage rod is fixed to the connecting column, and the other end is fixed to the fitting positioning block, the rear side of the fitting positioning block is in contact with the surface of the protective shell, and the fitting positioning block is located on the left side of the placer.

[0012] Preferably, a buffer device is provided on the right side of the protective shell, and the buffer device includes a mounting plate, a buffer rotating plate and an elastic support plate. The mounting plate is fixedly installed on the right side of the protective shell, and the top of the buffer rotating plate is hinged to the mounting plate. One end of the elastic support plate is fixed to the mounting plate, and the other end is fixed to the buffer rotating plate. The buffer rotating plate is located inside the rotating area of ​​the top of the handrail.

[0013] Preferably, the front and rear sides of the buffer turntable are respectively fixed to two vertical connecting rods, and the bottom end of the vertical connecting rod is fixed to a positioning block. The positioning block is located on the right side of the positioning plate. The positioning plate is circular and fixed on the side of the traveling wheel two close to the protective shell. A plurality of positioning recesses are provided on the positioning plate, and a plurality of positioning protrusions matching the positioning recesses are provided on the left side of the positioning block.

[0014] Preferably, the elastic support piece is arc-shaped and protrudes obliquely to the lower right, and a reinforced positioning rod is fixed to the front and rear sides of the elastic support piece, and one end of the reinforced positioning rod away from the elastic support piece contacts the surface of the placer.

[0015] Preferably, a reinforced handle is fixed on the surface of the placer, and the reinforced handle is arranged in an inclined shape with the left side lower and the right side higher, and the left end of the reinforced handle contacts the top of the fitting positioning block, and the right end contacts the reinforced positioning rod.

[0016] (III) Beneficial effects

[0017] The present invention provides a portable 3D holographic projection device, which has the following beneficial effects:

[0018] (1) The portable 3D holographic projection device can rotate by arranging a driving plate, utilizing the rightward movement of the traveling wheel 1 when it collides with a stone. When the driving plate rotates, the pushing plate can be pushed by the pushing bar to rotate. The pushing plate will push the stone on the left side of the traveling wheel 1 away from the traveling wheel 1, thereby preventing the stone from affecting the traveling speed of the entire device, and at the same time preventing the device from suddenly dropping in speed and causing the internal electronic devices to be damaged by collision.

[0019] (2) The portable 3D holographic projection device can protect the 3D holographic projector by providing a shielding guard plate, and can facilitate manual pushing of the device by providing a handrail; the 3D holographic projector can be taken out by providing an L-shaped guide rail and a slider, and the shielding guard plate and the handrail need to be rotated 180 degrees clockwise when the 3D holographic projector is taken out, so when the 3D holographic projector is slid out along the L-shaped guide rail, the bottom of the 3D holographic projector can be placed on the shielding guard plate, thereby supporting the taken-out 3D holographic projector, and the handrail is in contact with the right side of the protective shell to stabilize the position of the shielding guard plate and the 3D holographic projector.

[0020] (3) The portable 3D holographic projection device can fix the position of the placement device by setting an auxiliary stabilization device and utilizing the rightward movement of the traveling wheel 1 and the connecting column, thereby limiting the placement device when the traveling wheel 1 collides with a stone, preventing the impact force generated by the collision from causing the placement device to fall out of the protective shell, thereby improving the stability of the placement device.

[0021] (4) The portable 3D holographic projection device can provide a buffering effect on the rotation of the shielding guard plate and the handrail, thereby preventing the shielding guard plate and the handrail from generating a large collision force between the handrail and the protective shell when the shielding guard plate and the handrail rotate clockwise, thereby preventing the protective shell from being damaged, thereby improving the service life of the device; by providing a vertical connecting rod, the pressure of the handrail on the buffer rotating plate can be used to move the positioning block to the left, and the positioning protrusion on the positioning block will be stuck in the positioning recess on the positioning plate to fix the position of the positioning plate and the second traveling wheel, thereby automatically improving the stability of the entire device when the 3D holographic projector moves out of the protective shell for projection, thereby preventing the device from moving on an inclined road surface, without the need for manual fixation.

[0022] (5) The portable 3D holographic projection device can further fix the placement device by setting an enhanced positioning rod, and the rotation of the hand plate will cause the buffer rotating plate to rotate. At this time, the elastic support sheet is squeezed and deformed, and the elastic support sheet will pull the enhanced positioning rod to move diagonally to the lower right, so that the enhanced positioning rod is separated from the placement device, so that the placement device can be taken out freely, so that the placement device does not need to be manually fixed, thereby improving the automatic effect of the device; the enhanced handle can be used to take out the placement device, and when the fitting positioning block abuts against the left end of the enhanced handle, the kinetic energy of the enhanced positioning rod hitting the right end of the enhanced handle will be transmitted to the traveling wheel 1 through the auxiliary stabilization device, causing the stones on the left side of the traveling wheel 1 to loosen and the impurities on the traveling wheel 1 to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the multi-angle structure of the traveling wheel in the present invention;

[0025] Figure 3 A partial cross-sectional view of the protective housing in the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the buffer device in the present invention;

[0027] Figure 5 For the present invention Figure 4 The enlarged structural diagram of part A in the middle;

[0028] Figure 6 It is a half-section view of the buffer device in the present invention.

[0029] In the figure: 1. Protective shell; 2. 3D holographic projector; 3. Beam; 31. Travel wheel one; 311. Connecting column; 32. Travel wheel two; 321. Positioning plate; 33. Driving plate; 34. Push bar; 35. Push-off plate; 4. Placer; 41. Reinforced handle; 5. Auxiliary stabilizing device; 51. Linkage rod; 52. Fitting positioning block; 6. Shielding guard plate; 61. Hand plate; 7. L-shaped guide rail; 71. Slider; 8. Buffer device; 81. Mounting plate; 82. Buffer rotating plate; 821. Vertical connecting rod; 822. Positioning block; 83. Elastic support sheet; 831. Reinforced positioning rod. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-6 The present invention provides a technical solution: a portable 3D holographic projection device, comprising a protective shell 1, a 3D holographic projector 2 is arranged inside the protective shell 1, and a crossbeam 3 is fixed to the bottom of the protective shell 1, and a traveling wheel 1 31 and a traveling wheel 2 32 are respectively installed on the left and right ends of the crossbeam 3, the traveling wheel 1 31 is rotatably connected to one end of a connecting column 311, and the other end of the connecting column 311 is slidably connected to the crossbeam 3, and a driving plate 33 is rotatably installed on the part of the crossbeam 3 located on the right side of the traveling wheel 1 31, one side of the driving plate 33 contacts the traveling wheel 1 31, and a torsion spring is arranged at the rotation connection between the driving plate 33 and the crossbeam 3, and the elastic force of the torsion spring is much greater than the friction between the traveling wheel 1 31 and the ground, and a pushing bar 34 is fixed on the other side, the pushing bar 34 movably passes through the crossbeam 3 and the end of the pushing bar 34 away from the driving plate 33 contacts the push-off plate 35, the push-off plate 35 is arc-shaped and one end is hingedly installed on the crossbeam 3, and the other end of the push-off plate 35 is located on the left side of the traveling wheel 1 31. By setting up the driving plate 33, the right movement of the traveling wheel 31 when colliding with the stone can be utilized to rotate, and when the driving plate 33 rotates, the push-off plate 35 can be pushed to rotate by the pushing bar 34. The push-off plate 35 will push the stone on the left side of the traveling wheel 31 away from the traveling wheel 31, thereby preventing the stone from affecting the traveling speed of the entire device, and at the same time preventing the device from suddenly dropping in speed and causing collision damage to the internal electronic devices.

[0032] Preferably, in this embodiment, a placement cavity is provided on the front and rear sides of the protective shell 1, and a placement device 4 is provided inside the placement cavity. The 3D glasses, mouse keyboard, 3D helmet and operating handle are stored inside the placement device 4. The placement device 4 can be used to store and protect the 3D glasses, mouse keyboard, 3D helmet and operating handle.

[0033] Preferably, in this embodiment, the protective shell 1 is hollow and has an opening at the top, and the top of the protective shell 1 is located at the opening and contacts the shielding guard plate 6, the right side of the shielding guard plate 6 is hingedly mounted on the top of the protective shell 1, and a hand support plate 61 is fixed to the top of the right side of the shielding guard plate 6, and the hand support plate 61 is perpendicular to the shielding guard plate 6. The shielding guard plate 6 can be provided to protect the 3D holographic projector 2, and the hand support plate 61 can be provided to facilitate manual pushing of the device for movement.

[0034] Preferably, in this embodiment, an L-shaped guide rail 7 is fixed inside the protective shell 1, and the left side of the L-shaped guide rail 7 is slidably connected to the slider 71, and the slider 71 is rotatably connected to the 3D holographic projector 2. The L-shaped guide rail 7 and the slider 71 can be used to take out the 3D holographic projector 2, and the shielding guard plate 6 and the hand support plate 61 need to be rotated 180 degrees clockwise when the 3D holographic projector 2 is taken out, so when the 3D holographic projector 2 is slid out along the L-shaped guide rail 7, the bottom of the 3D holographic projector 2 can be placed on the shielding guard plate 6, so as to support the taken out 3D holographic projector 2, and the hand support plate 61 contacts the right side of the protective shell 1 to stabilize the position of the shielding guard plate 6 and the 3D holographic projector 2.

[0035] Preferably, in this embodiment, an auxiliary stabilizing device 5 is provided on the connecting column 311, and the auxiliary stabilizing device 5 includes a linkage rod 51 and a fitting positioning block 52, one end of the linkage rod 51 is fixed to the connecting column 311, and the other end is fixed to the fitting positioning block 52, the rear side of the fitting positioning block 52 is in contact with the surface of the protective shell 1, and the fitting positioning block 52 is located on the left side of the placement device 4. By providing the auxiliary stabilizing device 5, the position of the placement device 4 can be fixed by utilizing the rightward movement of the traveling wheel 131 and the connecting column 311, so that the placement device 4 is limited when the traveling wheel 131 collides with a stone, preventing the impact force generated by the collision from causing the placement device 4 to fall out of the protective shell 1, thereby improving the stability of the placement device 4.

[0036] Preferably, in this embodiment, a buffer device 8 is provided on the right side of the protective shell 1, and the buffer device 8 includes a mounting plate 81, a buffer rotating plate 82 and an elastic support sheet 83. The mounting plate 81 is fixedly mounted on the right side of the protective shell 1, and the top of the buffer rotating plate 82 is hinged to the mounting plate 81. One end of the elastic support sheet 83 is fixed to the mounting plate 81, and the other end is fixed to the buffer rotating plate 82. The buffer rotating plate 82 is located inside the rotation area at the top of the hand support plate 61. The buffer device 8 can provide a buffering effect on the rotation of the shielding guard plate 6 and the hand support plate 61, so as to prevent the shielding guard plate 6 and the hand support plate 61 from generating a large collision force between the hand support plate 61 and the protective shell 1 when the shielding guard plate 6 and the hand support plate 61 rotate clockwise, thereby preventing the protective shell 1 from being damaged, so as to improve the service life of the device.

[0037] Preferably, in this embodiment, the front and rear sides of the buffer rotating plate 82 are respectively fixed to two vertical connecting rods 821, and the bottom end of the vertical connecting rod 821 is fixed to the positioning block 822. The positioning block 822 is located on the right side of the positioning plate 321. The positioning plate 321 is circular and fixed to the side of the traveling wheel 2 32 close to the protective shell 1. The positioning plate 321 is provided with a plurality of positioning notches, and the left side of the positioning block 822 is provided with a plurality of positioning protrusions adapted to the positioning notches. By providing the vertical connecting rod 821, the pressure of the hand support plate 61 on the buffer rotating plate 82 can be used to make the positioning block 822 move to the left. At this time, the positioning protrusion on the positioning block 822 will be stuck in the positioning notch on the positioning plate 321 to fix the position of the positioning plate 321 and the traveling wheel 2 32, thereby automatically improving the stability of the entire device when the 3D holographic projector 2 moves out of the protective shell 1 for projection, and preventing the device from moving on an inclined road surface without manual fixation.

[0038] Preferably, in this embodiment, the elastic support sheet 83 is arranged in an arc shape and the elastic support sheet 83 obliquely protrudes to the lower right. The front and rear sides of the elastic support sheet 83 are fixed with a reinforced positioning rod 831, and one end of the reinforced positioning rod 831 away from the elastic support sheet 83 contacts the surface of the placement device 4. The reinforced positioning rod 831 can further fix the placement device 4, and the rotation of the hand support plate 61 will cause the buffer rotating plate 82 to rotate. At this time, the elastic support sheet 83 is squeezed and deformed, and the elastic support sheet 83 will pull the reinforced positioning rod 831 to move obliquely to the lower right, and the reinforced positioning rod 831 will be separated from the placement device 4, so that the placement device 4 can be freely taken out, so that the placement device 4 does not need to be fixed manually, and the automatic effect of the device is improved.

[0039] Preferably, in this embodiment, a reinforced handle 41 is fixed on the surface of the placer 4, and the reinforced handle 41 is arranged in an inclined shape with the left side lower and the right side higher, and the left end of the reinforced handle 41 contacts the top of the fitting positioning block 52, and the right end abuts against the reinforced positioning rod 831. The reinforced handle 41 can be used to take out the placer 4, and when the fitting positioning block 52 abuts against the left end of the reinforced handle 41, the kinetic energy of the reinforced positioning rod 831 hitting the right end of the reinforced handle 41 will be transmitted to the traveling wheel 1 31 through the auxiliary stabilizing device 5, so as to loosen the stones on the left side of the traveling wheel 1 31 and cause the impurities on the traveling wheel 1 31 to fall off.

[0040] Working principle: Holding the hand plate 61, the whole device is pushed to the left. The interaction force between the shielding guard plate 6 and the top of the protective shell 1 keeps the shielding guard plate 6 and the hand plate 61 stable. When the whole device moves to the left, the traveling wheel 1 31 and the traveling wheel 2 32 will roll on the ground. When the traveling wheel 1 31 collides with an obstacle such as a stone, the traveling wheel 1 31 will be pushed to the right by the obstacle. At this time, the traveling wheel 1 31 pushes the driving plate 33 to rotate, and the driving plate 33 drives the pushing bar 34 to move. The pushing bar 34 pushes the push-off plate 35 to rotate, and the push-off plate 35 will push the stone on the left side of the traveling wheel 1 31, and the pushing direction is the direction away from the central axis of the protective shell 1, so as to prevent obstacles such as stones from affecting the movement of the device; the traveling wheel 1 31 will drive the connecting column 311 and the auxiliary stabilizing device 5 to move right during the rightward movement, and the fitting positioning block 52 will move to contact with the placing device 4, at which time the fitting positioning block 52 will have a blocking effect on the placing device 4 to prevent the placing device 4 from falling off from the protective shell 1;

[0041] When the 3D holographic projector 2 needs to be taken out for 3D holographic projection, the shielding guard plate 6 and the hand support plate 61 are rotated 180 degrees, and the end of the hand support plate 61 away from the shielding guard plate 6 contacts the right side of the protective shell 1, and the shielding guard plate 6 is rotated to the right side of the top of the protective shell 1 and is in a horizontal state, and the 3D holographic projector 2 is manually taken out, and the 3D holographic projector 2 drives the slider 71 to slide inside the L-shaped guide rail 7, and when the 3D holographic projector 2 moves to the top of the protective shell 1, the 3D holographic projector 2 is rotated and the bottom of the 3D holographic projector 2 is placed on the shielding guard plate 6, and the shielding guard plate 6 can support the 3D holographic projector 2, which is convenient for the use of the 3D holographic projector 2; and when the shielding guard plate 6 and the hand support plate 61 are rotated, the hand support plate 61 will collide with the buffer rotating plate 82 and push the buffer rotating plate 82 to rotate, and the elastic supporting sheet 83 is squeezed and deformed, and the elastic supporting sheet 83 The elastic force can produce a buffering effect on the impact received by the buffer rotating plate 82, avoiding the impact to generate noise and cause damage to the protective shell 1, and when the shielding guard plate 6 is rotated, the deformation of the elastic supporting sheet 83 will cause the convex side of the elastic supporting sheet 83 to deform obliquely to the lower right, and the deformation causes the enhanced positioning rod 831 to move obliquely to the lower right, and the enhanced positioning rod 831 is separated from the surface of the placement device 4, and the placement device 4 can be taken out normally. When the 3D holographic projector 2 is used and put back into the protective shell 1, the placement device 4 is first inserted into the protective shell 1, and the shielding guard plate 6 needs to be re-covered on the top of the protective shell 1. At this time, the elastic supporting sheet 83 is in a normal state, and the enhanced positioning rod 831 is in contact with the surface of the placement device 4, which can automatically fix the placement device 4 and prevent the placement device 4 from being separated from the protective shell 1, so that the automatic fixation and release of the limit of the placement device 4 can be achieved before and after the shielding guard plate 6 is rotated;

[0042] When the elastic support sheet 83 is transformed from the deformed state to the normal state, the elastic support sheet 83 will drive the enhanced positioning rod 831 to move obliquely to the upper left direction, and the enhanced positioning rod 831 will hit the enhanced handle 41. If the fitting positioning block 52 and the traveling wheel 31 are pushed to contact the enhanced handle 41 by other obstacles such as stones at this time, the vibration generated by the impact of the enhanced positioning rod 831 on the enhanced handle 41 will be transmitted to the fitting positioning block 52 through the enhanced handle 41, and then transmitted to the traveling wheel 31 through the linkage rod 51, so as to loosen the obstacles such as stones on the left side of the traveling wheel 31, and at the same time, it can also cause the impurities on the traveling wheel 31 to fall off, so as to improve the smoothness of the subsequent traveling process;

[0043] When the hand plate 61 rotates to contact the buffer rotating plate 82, the buffer rotating plate 82 will rotate and drive the vertical connecting rod 821 and the positioning block 822 to move left, and the gravity of the 3D holographic projector 2 can improve the pushing effect of the hand plate 61 on the buffer rotating plate 82. When the positioning block 822 moves to the left, the positioning protrusion on its left side will be inserted into the positioning recess on the positioning plate 321. The position of the positioning plate 321 is fixed by the positioning block 822, so that the travel wheel 2 32 can be fixed when the hand plate 61 rotates to contact the buffer rotating plate 82, and the entire device can be fixed to the ground.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable 3D holographic projection device, comprising a protective housing (1), Features: A 3D holographic projector (2) is arranged inside the protective shell (1), and a crossbeam (3) is fixed at the bottom of the protective shell (1). A traveling wheel 1 (31) and a traveling wheel 2 (32) are respectively mounted on the left and right ends of the crossbeam (3). The traveling wheel 1 (31) is rotatably connected to one end of a connecting column (311), and the other end of the connecting column (311) is slidably connected to the crossbeam (3). A driving plate (33) is rotatably mounted on a portion of the crossbeam (3) located on the right side of the traveling wheel 1 (31). One side of the driving plate (33) contacts the traveling wheel 1 (31), and the other side is fixed with a pushing bar (34). The pushing bar (34) movably passes through the crossbeam (3), and one end of the pushing bar (34) away from the driving plate (33) contacts a push-off plate (35). The push-off plate (35) is arc-shaped and one end is hingedly mounted on the crossbeam (3). The other end of the push-off plate (35) is located on the left side of the traveling wheel 1 (31). The protective shell (1) is provided with a placement cavity on the front and rear sides, a placement device (4) is arranged inside the placement cavity, and the placement device (4) stores 3D glasses, a mouse and keyboard, a 3D helmet and an operating handle inside.

2. A portable 3D holographic projection device according to claim 1, Features: The protective shell (1) is hollow and has an opening at the top, and the top of the protective shell (1) is located at the opening and contacts the shielding guard plate (6), the right side of the shielding guard plate (6) is hingedly mounted on the top of the protective shell (1), and a handrail (61) is fixed to the top of the right side of the shielding guard plate (6), and the handrail (61) is perpendicular to the shielding guard plate (6).

3. A portable 3D holographic projection device according to claim 2, Features: An L-shaped guide rail (7) is fixed inside the protective housing (1); the left side of the L-shaped guide rail (7) is slidably connected to a slider (71); and the slider (71) is rotatably connected to the 3D holographic projector (2).

4. A portable 3D holographic projection device according to claim 3, Features: An auxiliary stabilizing device (5) is provided on the connecting column (311), and the auxiliary stabilizing device (5) comprises a linkage rod (51) and a fitting positioning block (52), one end of the linkage rod (51) is fixed to the connecting column (311), and the other end is fixed to the fitting positioning block (52), the rear side of the fitting positioning block (52) is in contact with the surface of the protective shell (1), and the fitting positioning block (52) is located on the left side of the placement device (4).

5. A portable 3D holographic projection device according to claim 4, Features: A buffer device (8) is provided on the right side of the protective shell (1), and the buffer device (8) comprises a mounting plate (81), a buffer rotating plate (82) and an elastic support sheet (83); the mounting plate (81) is fixedly mounted on the right side of the protective shell (1); the top of the buffer rotating plate (82) is hinged to the mounting plate (81); one end of the elastic support sheet (83) is fixed to the mounting plate (81) and the other end is fixed to the buffer rotating plate (82); the buffer rotating plate (82) is located inside the rotation area at the top of the hand support plate (61).

6. The portable 3D holographic projection device according to claim 5, Features: The front and rear sides of the buffer rotating plate (82) are respectively fixed to two vertical connecting rods (821); the bottom end of the vertical connecting rod (821) is fixed to a positioning block (822); the positioning block (822) is located on the right side of the positioning plate (321); the positioning plate (321) is circular and is fixed to a side of the second traveling wheel (32) close to the protective housing (1); a plurality of positioning notches are provided on the positioning plate (321); a plurality of positioning protrusions matching the positioning notches are provided on the left side of the positioning block (822).

7. The portable 3D holographic projection device according to claim 6, Features: The elastic support piece (83) is arranged in an arc shape and obliquely protrudes to the lower right. The front and rear sides of the elastic support piece (83) are both fixed with a reinforced positioning rod (831), and one end of the reinforced positioning rod (831) away from the elastic support piece (83) contacts the surface of the placement device (4).

8. The portable 3D holographic projection device according to claim 7, Features: A reinforced handle (41) is fixed on the surface of the placement device (4), and the reinforced handle (41) is arranged in an inclined shape with the left side lower and the right side higher, and the left end of the reinforced handle (41) contacts the top of the fitting positioning block (52), and the right end contacts the reinforced positioning rod (831).

Images