Outdoor aerobics teaching device and use method thereof

Abstract

The invention relates to the technical field of aerobics teaching devices, in particular to an aerobics outdoor teaching device and a using method thereof.The aerobics outdoor teaching device comprises a U-shaped frame, a U-shaped groove is rotatably connected to the interior of the U-shaped frame, a teaching screen is clamped in the U-shaped groove, a rotating mechanism is arranged between the U-shaped frame and the U-shaped groove, a sleeve rod is fixedly connected to the lower end of the U-shaped frame, and the sleeve rod is fixedly connected to the lower end of the U-shaped frame. A sliding rod is slidably connected into the sleeve rod, a transmission mechanism is arranged on the side face of the sleeve rod and the side face of the sliding rod, a lifting mechanism is fixedly connected to the lower end of the sliding rod, and a stabilizing mechanism is installed on the side face of the lifting mechanism. According to the teaching device, when the spline rod rotates, the U-shaped groove and the teaching screen are driven to rotate anticlockwise and face a student at the same time, when the spline rod rotates to a proper angle, the hand is loosened, the spring pushes the conical block to reset, the conical block is clamped in the conical groove, static friction is generated, the teaching screen is fixed, operation is convenient, and the service life is long.

Description

Technical Field

[0001] The invention relates to the technical field of aerobics teaching devices, in particular to an aerobics outdoor teaching device and a use method thereof. Background Art

[0002] With the development of the concept of physical education, people pay more and more attention to physical education in natural environment. For aerobics teaching, the outdoor environment can provide a wider space. In outdoor venues such as the square in the park and the lawn on the campus, students can stretch their limbs to their heart's content and complete some action combinations that are difficult to perform indoors. Moreover, the natural light outdoors is more abundant, which helps students to better observe the details of the teacher's demonstration movements visually. In addition, outdoor teaching can make students closer to nature. Doing aerobics in an environment with green trees, flowers and birds can reduce students' learning pressure and enhance their interest in learning aerobics.

[0003] The existing patent (Announcement No.: CN109697893B) discloses a teaching device that can compare the differences between Chinese and Western aerobics, including a bottom plate, a plurality of rollers movably installed on the bottom surface of the bottom plate, and vertical lifting rods are fixedly installed at the four corners of the top surface of the bottom plate, and the tops of the movable rods of the four lifting rods are fixedly connected by a box body, and the movable rods of the four lifting rods are respectively located at the four corners of the bottom surface of the box body. The above-mentioned teaching device that can compare the differences between Chinese and Western aerobics can make students understand more clearly by comparing the differences between Chinese and Western aerobics through pictures and writing content. In outdoor teaching, it is also convenient to hang pictures. At the same time, the combination of pictures and text can make it clearer and broaden students' knowledge. However, the teaching screen for aerobics outdoors requires a high viewing angle. In outdoor aerobics teaching, the standing positions of students are relatively scattered. Unlike the indoor environment, there are no fixed seats and neat arrangements outdoors. Students may form a larger circle or be distributed in different positions. This requires the outdoor display bracket to flexibly adjust the angle of the display to ensure that students at all positions can clearly see the teaching video, action decomposition diagram and other content. For example, during a large outdoor aerobics training event, there may be dozens of students in different directions, and the monitor stand needs to be able to rotate and tilt the monitor to a suitable angle and different heights to meet all-round visual needs. Summary of the invention

[0004] The purpose of the present invention is to provide an aerobics outdoor teaching device and a method of using the same, so as to solve the problems raised in the above background technology. To achieve the above purpose, the present invention provides the following technical solutions: an aerobics outdoor teaching device, comprising a U-shaped frame, the interior of the U-shaped frame is rotatably connected to a U-shaped groove, the interior of the U-shaped groove is clamped with a teaching screen, a rotating mechanism is provided between the U-shaped frame and the U-shaped groove, the lower end of the U-shaped frame is fixedly connected to a sleeve rod, the interior of the sleeve rod is slidably connected to a sliding rod, a transmission mechanism is provided on the side of the sleeve rod and the sliding rod, the lower end of the sliding rod is fixedly connected to a lifting mechanism, and a stabilizing mechanism is installed on the side of the lifting mechanism.

[0005] Preferably, the rotating mechanism includes a spline rod, the spline rod is fixedly connected to the side of the U-shaped groove, the U-shaped frame is internally rotatably connected with a spline hollow rod, the side of the U-shaped frame is fixedly connected with a conical groove, the conical groove is internally rotatably connected with a conical block, the side of the spline hollow rod is fixedly connected with a spline rod 1, a spring is provided between the conical block and the spline hollow rod, the side of the spline rod 1 is fixedly connected with a connecting shaft, a semicircular groove is provided on the side of the conical block, a semicircular ball is fixedly connected to the side of the connecting shaft, and the other side of the connecting shaft is fixedly connected with an L-shaped handle.

[0006] Preferably, the transmission mechanism includes a rotating shaft, which is rotatably connected to the side of the sleeve rod, a transmission belt 1 is transmission-connected between the rotating shaft and the spline rod, the lower end of the rotating shaft is rotatably connected to the telescopic rod, the side of the sliding rod is rotatably connected to the extrusion rod, the surface of the extrusion rod is provided with an oblique groove, the surface of the telescopic end of the telescopic rod is fixedly connected to the sliding rod, the lower end of the telescopic rod is rotatably connected to the gear 1, a transmission belt 2 is transmission-connected between the axis of the gear 1 and the rotating shaft, and the sliding rod is slidably connected inside the oblique groove.

[0007] The top end of the sliding panel also is connected with the sliding panel, and the inner edge of the sliding panel is fixedly connected with the back of the sliding panel, and the inner edge of the sliding panel is fixedly connected with the back of the sliding panel.

[0008] Preferably, the stabilizing mechanism includes a supporting wheel, the supporting wheel is fixedly connected to the side of the base, the side of the supporting wheel is rotatably connected with a rotating sleeve, the side of the rotating sleeve is fixedly connected with gear 2, the interior of the rotating sleeve is slidably connected with a special-shaped slide rod, the other end of the special-shaped slide rod is rotatably connected with a wheel, the interior of the rotating sleeve is rotatably connected with a roller, a transmission belt 3 is transmission-connected between the roller and the axis of gear 2, the special-shaped slide rod is fixedly connected to one side of the transmission belt 3 via a fixed block, and gear 2 is meshed with gear 1.

[0009] Preferably, the groove is rotatably connected to the U-shaped frame through a spline rod and a spline hollow rod, one end of the conical block is slidingly connected to the surface of the spline hollow rod, the spline rod is inside the conical block and spline-connected to the conical block, the semicircular ball fits with the semicircular groove, and the diameter of the semicircular groove is larger than the diameter of the semicircular ball.

[0010] Preferably, the sliding block is slidably connected to the surface of the square rod, the other end of the handle is fixedly connected to the surface of the annular sleeve, and the handle is limited by the slide groove, the slider is slidably connected to the surface of the sliding rod, the rope is wound around the pulley, and the lower end of the telescopic rod is fixedly connected to the surface of the base.

[0011] A method for using an aerobics outdoor teaching device comprises the following steps: S1. When used outdoors, when people gather and sit on the ground, they manually lift the L-shaped handle upwards. When the L-shaped handle rotates, it drives the connecting shaft to rotate. When the connecting shaft rotates, it drives the semi-circular ball to rotate. The semi-circular ball is embedded in the semi-circular groove. The semi-circular ball exerts a lateral force to force the semi-circular groove to separate along the axial direction, and at the same time squeezes the semi-circular groove, so that the tapered block slides in the tapered groove and separates from it, so that it cannot form static friction to achieve the unlocking effect. When the tapered block rotates, it drives the spline rod to rotate. When the spline rod rotates, it drives the spline hollow rod to rotate inside the U-shaped frame. When the spline hollow rod rotates, it drives the spline rod to rotate. When the spline rod rotates, it drives the U-shaped groove and the teaching screen to rotate counterclockwise at the same time, facing the students. When it rotates to a suitable angle, you can let go. After letting go, the spring pushes the tapered block to reset, get stuck in the tapered groove and generate static friction, so that the teaching screen is fixed, and the teaching screen can be straightened by turning the handle again; S2. When the spline rod rotates counterclockwise, the transmission belt 1 drives the rotating shaft to rotate counterclockwise. When the rotating shaft rotates, the transmission belt 2 drives the gear 1 to rotate counterclockwise. When the gear 1 rotates, it drives the gear 2 to rotate clockwise. When the gear 2 rotates, the transmission belt 3 is driven by the roller. When the transmission belt 3 is driven, the special-shaped slide bar is driven to slide inside the rotating sleeve through the fixed block. The special-shaped slide bar extends forward through the wheel to form a new center of gravity with the support wheel, which is on the same vertical line as the center of gravity formed by the inclination angle of the teaching screen. S3. When the personnel array is arranged or gathered, it is necessary to adjust the height of the teaching screen to an appropriate position. First, manually pull the handle, and the handle slides in the slide groove provided on the surface of the sliding block. When the handle slides, the annular sleeve is driven to slide on the surface of the I-shaped rotating rod. Whether it is upward or downward, the inclined surface blocks 2 at both ends of the annular sleeve will squeeze the inclined surface block 1 on the surface of the I-shaped rotating rod. After the inclined surface block 1 is squeezed, it will drive the I-shaped rotating rod to rotate inside the sliding block. When the I-shaped rotating rod rotates, it drives the semicircular block at the upper end to rotate. The semicircular block rotates in an annular manner and will separate from the grooves on the four sides of the square rod. In this way, the sliding block can move up and down freely on the surface of the square rod. At the same time, when the sliding block moves, the slider is driven to slide on the surface of the sliding rod through the connecting rod. When the slider moves, it pulls the rope, and the rope continues to pull the sleeve rod through the pulley, and the sleeve rod will slide on the surface of the sliding rod to adjust the height of the teaching screen. After the adjustment is completed, let go, the I-shaped rotating rod will be reset through the reset torsion spring rod, and at the same time, drive the semicircular block to continue to be stuck in the inside of the slot; S4. When the sleeve rod slides on the surface of the sliding rod, it drives the rotating shaft to move up and down. When the rotating shaft moves up and down, it drives the telescopic rod to extend and retract. When the telescopic rod extends and retracts, it drives the sliding rod on the surface of the telescopic end to move up and down. The sliding rod will slide inside the inclined groove and squeeze the extrusion rod through the inclined groove. The extrusion rod will rotate at the non-extensible end of the telescopic rod and squeeze the transmission belt 2 at the same time, so that the transmission distance between the rotating shaft and the gear 1 can be kept balanced.

[0012] In the present invention, when the spline rod rotates, the U-shaped groove and the teaching screen are driven to rotate counterclockwise at the same time, toward the students. When it rotates to a suitable angle, just let go. The spring pushes the conical block to reset, get stuck in the conical groove and generate static friction, so that the teaching screen is fixed. This is convenient for operation and has a long service life.

[0013] In the present invention, when the transmission belt is used for transmission, the fixed block drives the special-shaped sliding rod to slide inside the rotating sliding sleeve. The special-shaped sliding rod extends forward through the wheel to form a new center of gravity with the supporting wheel. The center of gravity formed by the inclination angle of the teaching screen is on the same vertical line, which not only prevents the center of gravity of the teaching screen from moving forward, but also maintains the stability of the teaching screen.

[0014] In the present invention, when the adjustment is completed and the hand is released, the I-shaped rotating rod will be reset through the reset torsion spring rod, and at the same time, the semicircular clamping block will continue to be clamped into the inside of the clamping slot. When the height is adjusted, the force on the pulley can be dispersed and balanced, thereby achieving a labor-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional appearance of the present invention; Figure 2 It is a schematic diagram of the back structure of the present invention; Figure 3 This is an enlarged structural diagram of the U-shaped frame of the present invention; Figure 4 It is a schematic diagram of the side cross-sectional structure of the rotating mechanism of the present invention; Figure 5 It is a schematic diagram of the internal structure of the rotating mechanism of the present invention; Figure 6 It is a schematic diagram of the enlarged structure of the conical block of the present invention; Figure 7 This is a schematic diagram of the enlarged structure of the connecting shaft of the present invention; Figure 8 It is a schematic diagram of the transmission mechanism structure of the present invention; Fig. 9 It is a schematic diagram of the local structure of the transmission mechanism of the present invention; Fig.10 For the present invention Fig. 9 A is a schematic diagram of the enlarged structure of the middle part; Fig.11 It is a schematic diagram of the lifting mechanism structure of the present invention; Fig.12 For the present invention Fig.11 A schematic diagram of the enlarged structure of B; Fig.13 This is a schematic diagram of the internal structure of the sliding block of the present invention; Fig.14 It is a schematic diagram of the pulley and other structures of the present invention; Fig.15 It is a schematic diagram of the structure of the stabilizing mechanism of the present invention.

[0016] In the figure: 1, U-shaped frame; 2, U-shaped groove; 3, teaching screen; 4, rotating mechanism; 5, sleeve rod; 6, sliding rod; 7, transmission mechanism; 8, lifting mechanism; 9, stabilizing mechanism; 41, spline rod; 42, spline hollow rod; 43, tapered groove; 44, tapered block; 45, spline rod 1; 46, spring; 47, connecting shaft; 48, semicircular groove; 49, semicircular ball; 410, L-shaped handle; 71, rotating shaft; 72, transmission belt 1; 73, telescopic rod; 74, extrusion rod; 75, inclined groove; 76, sliding rod; 77, gear 1; 78. Transmission belt 2; 81. Base; 82. Sliding block; 83. Slide groove; 84. Handle; 85. Connecting rod; 86. Sliding block; 87. I-shaped rotating rod; 88. Inclined block 1; 89. Annular sleeve; 810. Inclined block 2; 811. Reset torsion spring rod; 812. Semicircular clamping block; 813. Square rod; 814. Slot; 815. Pulley; 816. Wire rope; 91. Support wheel; 92. Rotating sliding sleeve; 93. Gear 2; 94. Special-shaped sliding rod; 95. Wheel; 96. Roller; 97. Transmission belt 3; 98. Fixed block. DETAILED DESCRIPTION

[0017] 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 technical personnel in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figures 1 to 15 The present invention provides a technical solution: an aerobics outdoor teaching device, comprising a U-shaped frame 1, the interior of the U-shaped frame 1 is rotatably connected to a U-shaped groove 2, the interior of the U-shaped groove 2 is clamped with a teaching screen 3, a rotating mechanism 4 is arranged between the U-shaped frame 1 and the U-shaped groove 2, a sleeve rod 5 is fixedly connected to the lower end of the U-shaped frame 1, a sliding rod 6 is slidably connected to the interior of the sleeve rod 5, a transmission mechanism 7 is arranged on the side of the sleeve rod 5 and the sliding rod 6, a lifting mechanism 8 is fixedly connected to the lower end of the sliding rod 6, and a stabilizing mechanism 9 is installed on the side of the lifting mechanism 8.

[0019] The rotating mechanism 4 includes a spline rod 41, which is fixedly connected to the side of the U-shaped groove 2, a spline hollow rod 42 is rotatably connected inside the U-shaped frame 1, a tapered groove 43 is fixedly connected to the side of the U-shaped frame 1, a tapered block 44 is rotatably connected inside the tapered groove 43, a spline rod 45 is fixedly connected to the side of the spline hollow rod 42, a spring 46 is provided between the tapered block 44 and the spline hollow rod 42, a connecting shaft 47 is fixedly connected to the side of the spline rod 45, a semicircular groove 48 is provided on the side of the tapered block 44, a semicircular ball 49 is fixedly connected to the side of the connecting shaft 47, and an L-shaped handle 410 is fixedly connected to the other side of the connecting shaft 47, and the U-shaped groove 2 is fixedly connected to the side of the U-shaped groove 2. The spline rod 41 and the spline hollow rod 42 are rotatably connected to the U-shaped frame 1, one end of the tapered block 44 is slidably connected to the surface of the spline hollow rod 42, the spline rod 45 is inside the tapered block 44 and spline-connected to the tapered block 44, the semicircular ball 49 fits with the semicircular groove 48, and the diameter of the semicircular groove 48 is larger than the diameter of the semicircular ball 49, and when the spline rod 41 rotates, the U-shaped groove 2 and the teaching screen 3 are driven to rotate counterclockwise at the same time, toward the students, and when it rotates to a suitable angle, just let go, the spring 46 pushes the tapered block 44 to reset, get stuck in the tapered groove 43 and generate static friction, so that the teaching screen 3 is fixed, which is easy to operate and has a long service life.

[0020] The transmission mechanism 7 includes a rotating shaft 71, which is rotatably connected to the side of the sleeve rod 5, a transmission belt 72 is transmission-connected between the rotating shaft 71 and the spline rod 41, the lower end of the rotating shaft 71 is rotatably connected to a telescopic rod 73, the side of the sliding rod 6 is rotatably connected to an extrusion rod 74, the surface of the extrusion rod 74 is provided with an inclined groove 75, the surface of the telescopic end of the telescopic rod 73 is fixedly connected to a slide rod 76, the lower end of the telescopic rod 73 is rotatably connected to a gear 1 77, a transmission belt 2 78 is transmission-connected between the axis of the gear 1 77 and the rotating shaft 71, and the slide rod 76 is slidably connected inside the inclined groove 75.

[0021] The lifting mechanism 8 includes a base 81, which is fixedly connected to the lower end of the sliding rod 6. A sliding block 82 is fixedly connected to the surface of the base 81. A sliding groove 83 is provided on the surface of the sliding block 82. A handle 84 is slidably connected to the inside of the sliding groove 83. Connecting rods 85 are fixedly connected to both sides of the sliding block 82. A sliding block 86 is fixedly connected to the side of the connecting rod 85. An I-shaped rotating rod 87 is rotatably connected to the inside of the sliding block 82. An inclined block 88 is fixedly connected to the upper and lower surfaces of the I-shaped rotating rod 87. An annular sleeve 89 is rotatably connected to the surface of the I-shaped rotating rod 87. An inclined block 810 is fixedly connected to the two ends of the annular sleeve 89. A reset torsion spring rod 811 is fixedly connected to the top of the I-shaped rotating rod 87. A semicircular block 812 is fixedly connected to the inner edge of the upper end of the I-shaped rotating rod 87. A square rod 813, the four corners of the square rod 813 are provided with card slots 814, the other side of the base 81 is rotatably connected with a pulley 815, a rope 816 is connected between the slider 86 and the sleeve rod 5, the sliding block 82 is slidably connected on the surface of the square rod 813, the other end of the handle 84 is fixedly connected to the surface of the annular sleeve 89, and the handle 84 is limited by the slide groove 83, the slider 86 is slidably connected on the surface of the sliding rod 6, the rope 816 is wound and connected with the pulley 815, and the lower end of the telescopic rod 73 is fixedly connected to the surface of the base 81. After the adjustment is completed, release the hand, the I-shaped rotating rod 87 will be reset by the reset torsion spring rod 811, and at the same time drive the semicircular card block 812 to continue to be inserted into the inside of the card slot 814. While adjusting the height, the force on the pulley 815 can be dispersed and balanced, thereby achieving a labor-saving effect.

[0022] The stabilizing mechanism 9 comprises a supporting wheel 91, which is fixedly connected to the side of the base 81. The side of the supporting wheel 91 is rotatably connected to a rotating sleeve 92, and the side of the rotating sleeve 92 is fixedly connected to a gear 2 93. The interior of the rotating sleeve 92 is slidably connected to a special-shaped slide rod 94, and the other end of the special-shaped slide rod 94 is rotatably connected to a wheel 95. The interior of the rotating sleeve 92 is rotatably connected to a roller 96, and a transmission belt 3 97 is transmission-connected between the roller 96 and the axis of the gear 2 93. The special-shaped slide rod 94 is fixedly connected to one side of the transmission belt 3 97 through a fixed block 98, and the gear 2 93 is meshed with the gear 1 77. When the transmission belt 3 97 is transmitted, the special-shaped slide rod 94 is driven to slide inside the rotating sleeve 92 through the fixed block 98. The special-shaped slide rod 94 extends forward through the wheel 95 to form a new center of gravity with the supporting wheel 91, and the center of gravity formed by the inclination angle of the teaching screen 3 is on the same vertical line. This not only prevents the center of gravity of the teaching screen 3 from moving forward, but also maintains the stability of the teaching screen 3.

[0023] The use method and advantages of the present invention: The aerobics outdoor teaching device and the use method thereof, when in use, the working process is as follows: See also Figures 1 to 15 ; A method for using an aerobics outdoor teaching device comprises the following steps: S1. When used outdoors, when people gather and sit on the ground, they manually lift the L-shaped handle 410 upwards. When the L-shaped handle 410 rotates, it drives the connecting shaft 47 to rotate. When the connecting shaft 47 rotates, it drives the semi-circular ball 49 to rotate. The semi-circular ball 49 is embedded in the semi-circular groove 48. The semi-circular ball 49 exerts a lateral force to force the semi-circular groove 48 to separate along the axial direction, and at the same time squeezes the semi-circular groove 48, so that the conical block 44 slides in the conical groove 43 and separates from it, so that it cannot form static friction to achieve the unlocking effect. When the conical block 44 rotates, it drives the spline rod 44 to rotate. 5 rotates, when the spline rod 45 rotates, the spline hollow rod 42 is driven to rotate inside the U-shaped frame 1, and when the spline hollow rod 42 rotates, the spline rod 41 is driven to rotate, and when the spline rod 41 rotates, the U-shaped groove 2 and the teaching screen 3 are driven to rotate counterclockwise at the same time, toward the students, and when it rotates to a suitable angle, just let go, after letting go, the spring 46 pushes the conical block 44 to reset, get stuck in the conical groove 43 and generate static friction, so that the teaching screen 3 is fixed, which is easy to operate and has a long service life, and the teaching screen 3 can be straightened by turning the handle again; S2. When the spline rod 41 rotates counterclockwise, the transmission belt 1 72 drives the rotating shaft 71 to rotate counterclockwise. When the rotating shaft 71 rotates, the transmission belt 2 78 drives the gear 1 77 to rotate counterclockwise. When the gear 1 77 rotates, it drives the gear 2 93 to rotate clockwise. When the gear 2 93 rotates, the transmission belt 3 97 is driven by the roller 96. When the transmission belt 3 97 is driven, the special-shaped slide bar 94 is driven to slide inside the rotating sleeve 92 through the fixed block 98. The special-shaped slide bar 94 extends forward through the wheel 95 to form a new center of gravity with the support wheel 91, which is on the same vertical line as the center of gravity formed by the inclination angle of the teaching screen 3. This not only prevents the center of gravity of the teaching screen 3 from moving forward, but also maintains the stability of the teaching screen 3. S3. When the personnel array is spread out or gathered together, it is necessary to adjust the height of the teaching screen 3 to an appropriate position. First, manually pull the handle 84, and the handle 84 slides in the slide groove 83 provided on the surface of the sliding block 82. When the handle 84 slides, it drives the annular sleeve 89 to slide on the surface of the I-shaped rotating rod 87. Whether it is upward or downward, the inclined surface blocks 2 810 at both ends of the annular sleeve 89 will squeeze the inclined surface blocks 1 88 on the surface of the I-shaped rotating rod 87. After the inclined surface block 1 88 is squeezed, it will drive the I-shaped rotating rod 87 to rotate inside the sliding block 82. When the I-shaped rotating rod 87 rotates, it drives the semicircular block 812 at the upper end to rotate. The semicircular block 812 rotates in a ring shape, and it will be in contact with the four sides of the square rod 813. The card slot 814 is separated, so that the sliding block 82 can move up and down freely on the surface of the square rod 813. At the same time, when the sliding block 82 moves, the connecting rod 85 drives the sliding block 86 to slide on the surface of the sliding rod 6. When the sliding block 86 moves, the sliding pulls the wire rope 816, and the wire rope 816 continues to pull the sleeve rod 5 through the pulley 815, and the sleeve rod 5 will slide on the surface of the sliding rod 6 to adjust the height of the teaching screen 3. After the adjustment is completed, let go, the I-shaped rotating rod 87 will be reset through the reset torsion spring rod 811, and at the same time drive the semicircular card block 812 to continue to be inserted into the inside of the card slot 814. When adjusting the height, the force on the pulley 815 can be dispersed and balanced, thereby achieving a labor-saving effect; S4. When the sleeve rod 5 slides on the surface of the sliding rod 6, it drives the rotating shaft 71 to move up and down. When the rotating shaft 71 moves up and down, it drives the telescopic rod 73 to extend and retract. When the telescopic rod 73 retracts and retracts, it drives the sliding rod 76 on the surface of the retractable end to move up and down. The sliding rod 76 will slide inside the inclined groove 75 and squeeze the squeezing rod 74 through the inclined groove 75. The squeezing rod 74 will rotate at the non-retractable end of the telescopic rod 73 and squeeze the transmission belt 2 78 at the same time. In this way, the transmission distance between the rotating shaft 71 and the gear 1 77 can be kept balanced, and the change in the center of gravity position of the teaching screen 3 will not be affected when the teaching screen 3 is adjusted.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An aerobics outdoor teaching device, comprising a U-shaped frame (1), characterized in that: The U-shaped frame (1) is rotatably connected to a U-shaped groove (2), a teaching screen (3) is clamped inside the U-shaped groove (2), a rotating mechanism (4) is provided between the U-shaped frame (1) and the U-shaped groove (2), a sleeve rod (5) is fixedly connected to the lower end of the U-shaped frame (1), a sliding rod (6) is slidably connected to the inside of the sleeve rod (5), a transmission mechanism (7) is provided on the side of the sleeve rod (5) and the sliding rod (6), a lifting mechanism (8) is fixedly connected to the lower end of the sliding rod (6), and a stabilizing mechanism (9) is installed on the side of the lifting mechanism (8); The rotating mechanism (4) comprises a spline rod (41), the spline rod (41) being fixedly connected to a side of the U-shaped groove (2), a spline hollow rod (42) being rotatably connected inside the U-shaped frame (1), a conical groove (43) being fixedly connected to the side of the U-shaped frame (1), a conical block (44) being rotatably connected inside the conical groove (43), a spline rod 1 (45) being fixedly connected to the side of the spline hollow rod (42), a spring (46) being provided between the conical block (44) and the spline hollow rod (42), a connecting shaft (47) being fixedly connected to the side of the spline rod 1 (45), a semicircular groove (48) being provided on the side of the conical block (44), a semicircular ball (49) being fixedly connected to the side of the connecting shaft (47), and an L-shaped handle (410) being fixedly connected to the other side of the connecting shaft (47).

2. The aerobics outdoor teaching device according to claim 1, characterized in that: The transmission mechanism (7) comprises a rotating shaft (71), the rotating shaft (71) is rotatably connected to the side of the sleeve rod (5), a transmission belt 1 (72) is transmission-connected between the rotating shaft (71) and the spline rod (41), the lower end of the rotating shaft (71) is rotatably connected to a telescopic rod (73), the side of the sliding rod (6) is rotatably connected to an extrusion rod (74), a surface of the extrusion rod (74) is provided with an inclined groove (75), a surface of a telescopic end of the telescopic rod (73) is fixedly connected to a slide rod (76), the lower end of the telescopic rod (73) is rotatably connected to a gear 1 (77), a transmission belt 2 (78) is transmission-connected between the axis of the gear 1 (77) and the rotating shaft (71), and the slide rod (76) is slidably connected inside the inclined groove (75).

3. The aerobics outdoor teaching device according to claim 2, characterized in that: The lifting mechanism (8) comprises a base (81), wherein the base (81) is fixedly connected to the lower end of the sliding rod (6), a sliding block (82) is fixedly connected to the surface of the base (81), a sliding groove (83) is provided on the surface of the sliding block (82), a handle (84) is slidably connected inside the sliding groove (83), connecting rods (85) are fixedly connected to the two sides of the sliding block (82), a sliding block (86) is fixedly connected to the side of the connecting rod (85), an I-shaped rotating rod (87) is rotatably connected inside the sliding block (82), and an inclined block (88) is fixedly connected to the upper and lower surfaces of the I-shaped rotating rod (87). The surface of the I-shaped rotating rod (87) is rotatably connected to an annular sleeve (89), and two ends of the annular sleeve (89) are fixedly connected to inclined surface blocks (810). The top of the I-shaped rotating rod (87) is fixedly connected to a reset torsion spring rod (811), and the inner edge of the upper end of the I-shaped rotating rod (87) is fixedly connected to a semicircular clamping block (812). The surface of the base (81) is fixedly connected to a square rod (813), and four corners of the square rod (813) are provided with clamping grooves (814). The other surface of the base (81) is rotatably connected to a pulley (815), and a wire rope (816) is connected between the slider (86) and the sleeve rod (5).

4. The aerobics outdoor teaching device according to claim 3, characterized in that: The stabilizing mechanism (9) comprises a supporting wheel (91), wherein the supporting wheel (91) is fixedly connected to a side surface of a base (81), the side surface of the supporting wheel (91) is rotatably connected to a rotating sleeve (92), the side surface of the rotating sleeve (92) is fixedly connected to a gear 2 (93), the interior of the rotating sleeve (92) is slidably connected to a special-shaped slide rod (94), the other end of the special-shaped slide rod (94) is rotatably connected to a wheel (95), the interior of the rotating sleeve (92) is rotatably connected to a rotating roller (96), a transmission belt 3 (97) is transmission-connected between the rotating roller (96) and the axis of the gear 2 (93), the special-shaped slide rod (94) is fixedly connected to one side of the transmission belt 3 (97) via a fixing block (98), and the gear 2 (93) is meshed with the gear 1 (77).

5. The aerobics outdoor teaching device according to claim 1, characterized in that: The U-shaped groove (2) is rotatably connected to the U-shaped frame (1) via a spline rod (41) and a spline hollow rod (42); one end of the conical block (44) is slidably connected to the surface of the spline hollow rod (42); the spline rod (45) is inside the conical block (44) and is spline-connected to the conical block (44); the semicircular ball (49) fits into the semicircular groove (48), and the diameter of the semicircular groove (48) is larger than the diameter of the semicircular ball (49).

6. The aerobics outdoor teaching device according to claim 3, characterized in that: The sliding block (82) is slidably connected to the surface of the square rod (813), the other end of the handle (84) is fixedly connected to the surface of the annular sleeve (89), and the handle (84) is limited by the slide groove (83), the slider (86) is slidably connected to the surface of the sliding rod (6), the rope (816) is wound and connected to the pulley (815), and the lower end of the telescopic rod (73) is fixedly connected to the surface of the base (81).

7. A method for using an aerobics outdoor teaching device according to any one of claims 3 to 6, characterized in that: The following steps are involved: S1. When used outdoors, when people gather and sit on the ground, they manually lift the L-shaped handle (410) upward. When the L-shaped handle (410) rotates, it drives the connecting shaft (47) to rotate. When the connecting shaft (47) rotates, it drives the semi-circular ball (49) to rotate. The semi-circular ball (49) is embedded in the semi-circular groove (48). The semi-circular ball (49) exerts a lateral force to force the semi-circular groove (48) to separate along the axial direction, and at the same time squeezes the semi-circular groove (48), so that the conical block (44) slides in the conical groove (43) and separates from it, so that it cannot form static friction, thereby achieving the unlocking effect. When the conical block (44) rotates, it drives The spline rod (45) rotates, and when the spline rod (45) rotates, the spline hollow rod (42) is driven to rotate inside the U-shaped frame (1). When the spline hollow rod (42) rotates, the spline rod (41) is driven to rotate. When the spline rod (41) rotates, the U-shaped groove (2) and the teaching screen (3) are driven to rotate counterclockwise at the same time, toward the student. When the rotation reaches a suitable angle, the hand is released. After the hand is released, the spring (46) pushes the conical block (44) to reset, and is stuck in the conical groove (43) and generates static friction, so that the teaching screen (3) is fixed, and the teaching screen (3) can be straightened by turning the handle again; S2, when the spline rod (41) rotates counterclockwise, the transmission belt 1 (72) drives the rotating shaft (71) to rotate counterclockwise, when the rotating shaft (71) rotates, the transmission belt 2 (78) drives the gear 1 (77) to rotate counterclockwise, when the gear 1 (77) rotates, it drives the gear 2 (93) to rotate clockwise, when the gear 2 (93) rotates, the transmission belt 3 (97) is driven by the roller (96), when the transmission belt 3 (97) is driven, the special-shaped slide rod (94) is driven to slide inside the rotating sleeve (92) through the fixed block (98), the special-shaped slide rod (94) extends forward through the wheel (95), and forms a new center of gravity with the support wheel (91), which is on the same vertical line as the center of gravity formed by the inclination angle of the teaching screen (3); S3. When the personnel array is arranged or gathered, it is necessary to adjust the height of the teaching screen (3) to an appropriate position. First, the handle (84) is manually pulled, and the handle (84) slides in the slide groove (83) provided on the surface of the sliding block (82). When the handle (84) slides, the annular sleeve (89) is driven to slide on the surface of the I-shaped rotating rod (87). Whether upward or downward, the inclined surface blocks 2 (810) at both ends of the annular sleeve (89) will squeeze the inclined surface blocks 1 (88) on the surface of the I-shaped rotating rod (87). After the inclined surface block 1 (88) is squeezed, it will drive the I-shaped rotating rod (87) to rotate inside the sliding block (82). When the I-shaped rotating rod (87) rotates, it drives the semicircular block (812) at the upper end to rotate. The semicircular block (812) is The circular rotation will separate the clamping grooves (814) on the four sides of the square rod (813), so that the sliding block (82) can move freely up and down on the surface of the square rod (813). At the same time, when the sliding block (82) moves, the connecting rod (85) drives the slider (86) to slide on the surface of the sliding rod (6). When the slider (86) moves, the sliding pulls the wire rope (816), and the wire rope (816) continues to pull the sleeve rod (5) through the pulley (815). The sleeve rod (5) will slide on the surface of the sliding rod (6) to adjust the height of the teaching screen (3). After the adjustment is completed, let go, and the I-shaped rotating rod (87) will be reset through the reset torsion spring rod (811), and at the same time drive the semicircular clamping block (812) to continue to be clamped into the inside of the clamping groove (814); S4. When the sleeve rod (5) slides on the surface of the sliding rod (6), the rotating shaft (71) is driven to move up and down. When the rotating shaft (71) moves up and down, the telescopic rod (73) is driven to extend and retract. When the telescopic rod (73) is extended and retracted, the sliding rod (76) on the surface of the telescopic end is driven to move up and down. The sliding rod (76) slides inside the inclined groove (75) and squeezes the squeezing rod (74) through the inclined groove (75). The squeezing rod (74) rotates at the non-retractable end of the telescopic rod (73) and squeezes the transmission belt 2 (78) at the same time. In this way, the transmission distance between the rotating shaft (71) and the gear 1 (77) can be kept balanced.

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