A leg press trainer for physical education teaching

Abstract

A leg press trainer for physical education teaching, comprising a leg press machine base, a seat cushion is arranged at the lower part of the leg press machine base, circular rod sliding rails are arranged on both sides of the leg press machine base, a pedal board is slidably arranged on the two circular rod sliding rails together, a placing rod for placing counterweight blocks is fixedly connected to the pedal board, a first clamping rod for clamping the pedal board is rotatably arranged on the circular rod sliding rail, and a lifting mechanism for lifting the thigh is arranged on the leg press machine base. By adjusting the height and position of the limiting rod, the thigh is lifted and limited, so that the knee joint is in a slightly flexed state, thereby effectively preventing the knee joint from straightening and hyperextending.

Description

Technical Field

[0001] The present invention relates to a reverse leg press trainer, and more particularly to a reverse leg press trainer for physical education teaching. Background Art

[0002] A reverse leg press trainer is a basic leg training tool mainly used to exercise the muscle groups of the lower limbs, enhance muscle strength and shape muscle lines. In physical education teaching, the reverse leg press trainer can be used to fully exercise the lower limb strength of students.

[0003] The patent with the patent authorization announcement number CN108404362A discloses a reverse leg press trainer. By adjusting the rotation of the handle, the connecting rod drives the limiting frame and the limiting frame to rotate around the fixed sleeve, so that the limiting frame rotates into the inclined support frame and no longer limits the pedal frame, and then the pedal frame can be pedaled out with the feet to start the reverse leg press training. However, this patent still has deficiencies in actual use. When training novices, the knee joint is prone to be in a completely straight or even hyperextended wrong state, which not only affects the training effect but also is likely to cause damage to the knee joint in the long run.

[0004] Therefore, there is an urgent need to provide a reverse leg press trainer for physical education teaching that can effectively prevent the knee joint from straightening and hyperextending during training. Summary of the Invention

[0005] In order to overcome the shortcoming that when novices are training, the knee joint is prone to be in a completely straight or even hyperextended wrong state, which not only affects the training effect but also is likely to cause damage to the knee joint in the long run, the present invention provides a reverse leg press trainer for physical education teaching that can effectively prevent the knee joint from straightening and hyperextending during training.

[0006] To achieve the above problems, the present invention adopts the following technical solutions: A reverse leg press trainer for physical education teaching includes a reverse leg press machine base. A seat cushion is arranged at the lower part of the reverse leg press machine base. Circular rod slide rails are arranged on both sides of the reverse leg press machine base. A pedal is slidably arranged on the two circular rod slide rails together. A storage rod for placing counterweights is fixedly connected to the pedal. A first clamping rod for clamping the pedal is rotatably arranged on the circular rod slide rail. An elevation mechanism for lifting the thigh is arranged on the reverse leg press machine base.

[0007] More preferably, the elevation mechanism includes a guide rail fixedly connected to the reverse leg press machine base. A slider is slidably arranged on the guide rail. A plurality of through holes are opened in the slider. A limiting rod for lifting the thigh is slidably arranged in the topmost through hole of the slider. A fixing cover for fixing the limiting rod is threadedly arranged on the limiting rod. A second clamping rod for fixing the slider is slidably penetrated through the slider. A first elastic member for resetting the second clamping rod is sleeved on the second clamping rod.

[0008] More preferably, a limiting mechanism is further included. The limiting mechanism is arranged on the pedal board. The limiting mechanism includes a first mounting plate fixedly connected to the pedal board. A first sliding plate is slidably arranged on the first mounting plate. A second elastic member for resetting the first sliding plate is sleeved on the lower part of the first sliding plate. The first sliding plate and the second elastic member cooperate to limit the position of the heel. A second mounting plate is fixedly connected to one side of the first mounting plate opposite to the first mounting plate. A second sliding plate is slidably penetrated through the second mounting plate. A third elastic member for resetting the second sliding plate is sleeved on the upper part of the second sliding plate. The second sliding plate and the third elastic member cooperate to limit the position of the toe. A clamping plate is fixedly connected to the pedal board. A third clamping rod for fixing the second sliding plate is slidably penetrated through the clamping plate.

[0009] More preferably, a pressure reducing mechanism is further included. The pressure reducing mechanism is arranged on the slider. The pressure reducing mechanism includes a first mounting block fixed on the slider. A dial block in sliding contact with the first clamping rod is fixedly connected to the first mounting block. By driving the dial block to move through the first mounting block, the dial block can be made to squeeze the first clamping rod to rotate. A rotating rod is rotatably connected to the first mounting block. A third mounting plate is penetrated through the rotating rod. An anti-wear soft pad is slidably penetrated through the third mounting plate. A limiting plate for limiting the position of the third mounting plate is fixedly connected to the first mounting block. A fourth elastic member for resetting the anti-wear soft pad is sleeved on the front part of the anti-wear soft pad. During training, pressure reduction can be carried out by moving and compressing the fourth elastic member through the anti-wear soft pad.

[0010] More preferably, the limiting plate is located below the third mounting plate.

[0011] More preferably, a positioning mechanism is further included. The positioning mechanism is arranged on the pedal board. The positioning mechanism includes a first rack slidably arranged on the pedal board. A second rack is slidably arranged on the pedal board. Guide plates for clamping the feet are fixedly connected to both the first rack and the second rack. A limiting frame is fixedly connected to the pedal board. A gear meshing with the first rack and the second rack is rotatably arranged on the limiting frame. During use, by rotating the gear, the first rack and the second rack can be made to drive their respective guide plates to move inwards or outwards under the meshing action.

[0012] More preferably, the guide plate is inclined.

[0013] More preferably, an auxiliary pushing mechanism is further included. The auxiliary pushing mechanism is arranged on the storage rod. The auxiliary pushing mechanism includes a connecting plate, the connecting plate is fixedly connected to the storage rod, a pulling rope is connected to the connecting plate, a handle is arranged at the end of the pulling rope, and by pulling the pulling rope through the handle, the pulling rope is used to pull the pedal to move for training assistance. Installation frames are fixedly connected to both sides of the reverse leg press machine base, a wire roller is arranged on the installation frame, a limiting block is slidably arranged on the wire roller, and the pulling rope passes through the limiting block, so that the limiting block restricts the pulling rope.

[0014] More preferably, the handle is in a U shape.

[0015] More preferably, a force detection mechanism is further included. The force detection mechanism is arranged on the reverse leg press machine base. The force detection mechanism includes an installation rod, two clamping plates are slidably arranged on the installation rod, a fifth elastic member for resetting the clamping plates is sleeved on the installation rod, a second installation block is slidably arranged jointly by the two clamping plates, a display screen for displaying force values is arranged on the second installation block, and a pressure module for detecting the reverse leg press force is arranged on the second installation block. The pressure module can be clamped on the reverse leg press machine base and the round rod slide rail through the cooperation of the clamping plates and the fifth elastic member.

[0016] Compared with the prior art, the present invention has the following technical effects: 1. By adjusting the height and position of the limiting rod, the thigh is lifted and limited, so that the knee joint is in a slightly bent state, thereby effectively preventing the knee joint from straightening and hyperextending.

[0017] 2. When the thigh presses against the chest cavity, the thigh squeezes the anti-abrasion soft pad, so that the anti-abrasion soft pad compresses the fourth elastic member for buffering, thereby effectively reducing the pressure borne by the upper body.

[0018] 3. By rotating the gear, the guide plate moves inwards to a suitable position to clamp the foot and position it in the middle of the pedal, so as to ensure that the foot is parallel to the body.

[0019] 4. By using the clamping plate to fix the pressure module on the round rod slide rail, when the pedal is pushed open, the pedal contacts the pressure module, so as to collect pressure data, which is convenient for targeted training according to the data. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 It is a three-dimensional sectional structural schematic diagram of the reverse leg press machine base, pedal and storage rod of the present invention.

[0022] Figure 3Schematic diagram of the three-dimensional sectional structure of the round rod slide rail, pedal board and first clamping rod of the present invention.

[0023] Figure 4 Schematic diagram of the three-dimensional sectional structure of the base, round rod slide rail and guide rail of the reverse leg press machine of the present invention.

[0024] Figure 5 is Figure 4 The enlarged view of part A in

[0025] Figure 6 is Figure 4 The enlarged view of part B in

[0026] Figure 7 Schematic diagram of the three-dimensional structure of the first mounting plate, clamping plate and second mounting plate of the present invention.

[0027] Figure 8 Schematic diagram of the three-dimensional sectional structure of the first mounting block, dialing block and rotating rod of the present invention.

[0028] Figure 9 Schematic diagram of the three-dimensional sectional structure of the third mounting plate, limiting plate and anti-wear soft pad of the present invention.

[0029] Figure 10 Schematic diagram of the three-dimensional sectional structure of the first rack, guide plate and second rack of the present invention.

[0030] Figure 11 Schematic diagram of the three-dimensional sectional structure of the second rack, limiting frame and gear of the present invention.

[0031] Figure 12 Schematic diagram of the three-dimensional structure of the pulling rope, handle and mounting bracket of the present invention.

[0032] Figure 13 Schematic diagram of the three-dimensional sectional structure of the clamping plate, display screen and pressure module of the present invention.

[0033] The markings of each component in the attached drawings are as follows: 1. Inclined leg press machine base, 2. Seat cushion, 3. Round rod slide rail, 4. Pedal board, 5. Storage rod, 6. First clamping rod, 701. Guide rail, 702. Slide block, 703. Limit rod, 704. Fixed cover, 705. Second clamping rod, 706. First elastic member, 801. First mounting plate, 802. First sliding plate, 803. Second elastic member, 804. Clamping plate, 805. Third clamping rod, 806. Second mounting plate, 807. Second sliding plate, 808. Third elastic member, 901. First mounting block, 902. Pushing block, 903. Rotating rod, 904. Third mounting plate, 905. Limit plate, 906. Anti-wear soft pad, 907. Fourth elastic member, 1001. First rack, 1002. Guide plate, 1003. Second rack, 1004. Limit frame, 1005. Gear, 1101. Connecting plate, 1102. Pulling rope, 1103. Handle, 1104. Mounting frame, 1105. Wire roller, 1106. Limit block, 1201. Mounting rod, 1202. Clamping plate, 1203. Fifth elastic member, 1204. Second mounting block, 1205. Display screen, 1206. Pressure module. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] Please refer to Figures 1-3 , a leg press trainer for physical education teaching, including an inclined leg press machine base 1. A seat cushion 2 is arranged at the lower part of the inclined leg press machine base 1. Round rod slide rails 3 are arranged on both the left and right sides of the inclined leg press machine base 1. A pedal board 4 is slidably arranged on the two round rod slide rails 3. Two storage rods 5 for placing counterweights are fixedly connected to the pedal board 4 by welding. The two storage rods 5 are symmetrically distributed left and right. A first clamping rod 6 for clamping the pedal board 4 is rotatably arranged on the round rod slide rail 3. An elevation mechanism is arranged on the inclined leg press machine base 1, and the elevation mechanism is used to elevate the thigh.

[0037] Please refer to Figures 4-6, the lifting mechanism includes guide rails 701. The total number of the guide rails 701 is two, and the two guide rails 701 are respectively fixedly connected to the left and right sides inside the leg press machine base 1. A slider 702 is slidably arranged on the guide rails 701. A plurality of through holes are formed in the slider 702. A limiting rod 703 for lifting the thigh is slidably arranged in the topmost through hole of the slider 702. A fixing cover 704 for fixing the limiting rod 703 is threadedly arranged on the limiting rod 703. A second clamping rod 705 for fixing the slider 702 is slidably inserted through the slider 702. A first elastic member 706 for resetting the second clamping rod 705 is sleeved on the second clamping rod 705. Two ends of the first elastic member 706 are respectively connected to the second clamping rod 705 and the slider 702.

[0038] Please refer to Figure 7 , and further includes a limiting mechanism for limiting the feet. The limiting mechanism is arranged on the pedal 4. The limiting mechanism includes a first mounting plate 801. The first mounting plate 801 is fixedly connected to the bottom of the pedal 4. A first sliding plate 802 is slidably arranged on the first mounting plate 801. A second elastic member 803 for resetting the first sliding plate 802 is sleeved on the lower part of the first sliding plate 802. Two ends of the second elastic member 803 are respectively connected to the first sliding plate 802 and the first mounting plate 801. The first sliding plate 802 and the second elastic member 803 cooperate to limit the position of the heel. A second mounting plate 806 is fixedly connected to one side of the first mounting plate 801 opposite to the first mounting plate 801 by welding. A second sliding plate 807 is slidably inserted through the second mounting plate 806. A third elastic member 808 for resetting the second sliding plate 807 is sleeved on the upper part of the second sliding plate 807. Two ends of the third elastic member 808 are respectively connected to the second sliding plate 807 and the second mounting plate 806. The second sliding plate 807 and the third elastic member 808 cooperate to limit the position of the toe. A clamping plate 804 is fixedly connected to the rear side of the upper part of the pedal 4 by welding. A third clamping rod 805 for fixing the second sliding plate 807 is slidably inserted through the clamping plate 804.

[0039] The locking cam 705 is then released to lock the legs, and the locking cam 706 is released to lock the legs. When the foot is in the high stepping position, the foot is located directly above the pedal board 4, the toes are against the second sliding plate 807, and the heel of the foot contacts the first sliding plate 802. If it is the low stepping position, the foot is located directly below the pedal board 4, the heel is against the first sliding plate 802, and the second elastic member 803 is compressed accordingly. At this time, the third elastic member 808 is in a stretched state. After the first sliding plate 802 contacts the heel, the third clamping rod 805 is pulled open, and the second sliding plate 807 is moved down and contacts the toes under the restoring elastic force of the third elastic member 808. In this way, the foot is limited by the first sliding plate 802 and the second sliding plate 807 to prevent the foot from moving on the pedal board 4 during training and help maintain the foot posture. Then, the first clamping rod 6 is held and rotated to make the first clamping rod 6 release the pedal board 4, and the reverse pedaling training can be started. Repeat the action of pushing the pedal board 4 to a certain height with both legs and then slowly retracting the legs.

[0040] Example 2

[0041] Based on Example 1, please refer to Figure 8 and Figure 9, further comprising a decompression mechanism for reducing the pressure on the upper body. The decompression mechanism is arranged on the slider 702. The decompression mechanism includes a first mounting block 901, which is fixed to the rear side of the slider 702. The first mounting block 901 slides horizontally within the guide rail 701. A dial block 902 that is in sliding contact with the first latch 6 is fixedly connected to the front side of the middle part of the first mounting block 901 by welding. By driving the dial block 902 to move through the first mounting block 901, the dial block 902 can be made to squeeze the first latch 6 to rotate. A rotating rod 903 is rotatably connected to the upper part of the first mounting block 901. A third mounting plate 904 is penetrated through the rotating rod 903. An anti-wear soft pad 906 is slidably penetrated through the third mounting plate 904. A limiting plate 905 is fixedly connected to the upper part of the first mounting block 901 by welding. The limiting plate 905 is located below the third mounting plate 904 and is used to limit the position of the third mounting plate 904. Three fourth elastic members 907 for resetting the anti-wear soft pad 906 are sleeved on the front part of the anti-wear soft pad 906. Both ends of the fourth elastic member 907 are respectively connected to the anti-wear soft pad 906 and the third mounting plate 904. During training, decompression can be achieved by moving the anti-wear soft pad 906 to compress the fourth elastic member 907.

[0042] Before the trainee sits on the seat cushion 2, it is necessary to rotate the third mounting plate 904 upward to open it. After sitting properly, pull the third mounting plate 904 to reset it so that the anti-wear soft pad 906 is located between the thigh and the chest cavity. In this way, when performing the leg press training and the thigh presses against the chest cavity, the thigh squeezes the anti-wear soft pad 906, causing the anti-wear soft pad 906 to compress the fourth elastic member 907 for buffering, thereby effectively reducing the pressure on the upper body. Moreover, when moving the slider 702 to adjust the position of the limiting rod 703, the slider 702 drives the first mounting block 901 to move closer to the first latch 6, causing the dial block 902 to squeeze the first latch 6, and the first latch 6 then rotates to release the pedal plate 4. Thus, there is no need to manually unlock the pedal plate 4, making it more convenient to use.

[0043] Please refer to Figure 10 and Figure 11, further comprising a positioning mechanism for positioning the feet. The positioning mechanism is arranged on the pedal 4. The positioning mechanism includes a first rack 1001 which is slidably arranged on the left part of the pedal 4, and a second rack 1003 which is slidably arranged on the right part of the pedal 4. The first rack 1001 and the second rack 1003 are staggeredly distributed. Guide plates 1002 for clamping the feet are fixedly connected to both the first rack 1001 and the second rack 1003 by welding. The guide plates 1002 are inclined to facilitate clamping the feet. A limiting frame 1004 is fixedly connected to the rear side of the pedal 4 by welding. A gear 1005 meshing with the first rack 1001 and the second rack 1003 is rotatably arranged on the limiting frame 1004. During use, by rotating the gear 1005, the first rack 1001 and the second rack 1003 can drive their respective guide plates 1002 to move inwards or outwards under the meshing action.

[0044] Before the feet of the trainee are placed on the pedal 4, first rotate the gear 1005 to make the first rack 1001 and the second rack 1003 drive the guide plates 1002 to move outwards. After the feet of the trainee are placed on the pedal 4, rotate the gear 1005 in the reverse direction to make the guide plates 1002 move inwards to a proper position to clamp the feet of the trainee and position them to the middle position of the pedal 4, so as to ensure that the feet are parallel to the body.

[0045] Please refer to Figure 12 , further comprising an auxiliary pushing mechanism for assisting the trainee in training. The auxiliary pushing mechanism is arranged on the storage rod 5. The auxiliary pushing mechanism includes a connecting plate 1101 which is fixedly connected to the rear side of the storage rod 5. A pulling rope 1102 is connected to the connecting plate 1101. A handle 1103 is arranged at the end of the pulling rope 1102. The handle 1103 is in a U shape for convenient grasping. By pulling the pulling rope 1102 through the handle 1103, the pulling rope 1102 is made to pull the pedal 4 to move for training assistance. Mounting frames 1104 are fixedly connected to both the left and right sides of the reverse leg press machine base 1 by welding. A wire guiding roller 1105 is arranged through the upper part of the mounting frame 1104. A limiting block 1106 is slidably arranged on the wire guiding roller 1105. The pulling rope 1102 passes through the limiting block 1106, and the limiting block 1106 limits the pulling rope 1102.

[0046] During the reverse leg press training, the teaching staff can pull the pulling rope 1102 downwards by holding the handle 1103 to make the pulling rope 1102 pull the pedal 4 to move upwards for assistance, so as to help the trainee train better and contribute to the trainee quickly mastering the reverse leg press technique.

[0047] Please refer to Figure 13, further comprising a force detection mechanism for detecting the force during reverse pedaling. The force detection mechanism is arranged on the reverse pedaling machine base 1. The force detection mechanism includes a mounting rod 1201. Two clamping plates 1202 are slidably arranged on the mounting rod 1201. The two clamping plates 1202 are symmetrically distributed front and back. A fifth elastic member 1203 for resetting the clamping plates 1202 is sleeved on the mounting rod 1201. The two ends of the fifth elastic member 1203 are respectively connected to the mounting rod 1201 and the clamping plates 1202. A second mounting block 1204 is slidably arranged jointly by the two clamping plates 1202. A display screen 1205 for displaying the force value is arranged on the second mounting block 1204. A pressure module 1206 for detecting the reverse pedaling force is arranged on the second mounting block 1204. Through the cooperation of the clamping plates 1202 and the fifth elastic member 1203, the pressure module 1206 can be clamped on the reverse pedaling machine base 1 and the round rod slide rail 3.

[0048] Before reverse pedaling training, pull the clamping plates 1202 outwards, and the fifth elastic member 1203 is compressed accordingly. Then place the pressure module 1206 on the round rod slide rail 3, and then release the clamping plates 1202. Under the reset elasticity of the fifth elastic member 1203, the clamping plates 1202 are reset inwards to fix the pressure module 1206 on the round rod slide rail 3. During reverse pedaling training, the pedal 4 contacts the pressure module 1206, so as to collect pressure data, which is convenient for teaching staff to carry out targeted training according to the data.

[0049] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An inverted leg press trainer for physical education teaching, characterized in that it includes There is a leg press machine base (1), a seat cushion (2) is arranged at the lower part of the leg press machine base (1), round rod slides (3) are arranged on both sides of the leg press machine base (1), a pedal board (4) is slidably arranged on the two round rod slides (3) together, a placing rod (5) for placing counterweight blocks is fixedly connected to the pedal board (4), a first clamping rod (6) for clamping the pedal board (4) is rotatably arranged on the round rod slide (3), and a lifting mechanism for lifting the thighs is arranged on the leg press machine base (1).

2. The inverted leg press trainer for physical education teaching according to claim 1, characterized in that, The lifting mechanism includes a guide rail (701), the guide rail (701) is fixedly connected to the leg press machine base (1), a slider (702) is slidably arranged on the guide rail (701), a plurality of through holes are formed in the slider (702), a limiting rod (703) for lifting the thighs is slidably arranged in the topmost through hole of the slider (702), a fixing cover (704) for fixing the limiting rod (703) is threadedly arranged on the limiting rod (703), a second clamping rod (705) for fixing the slider (702) is slidably inserted through the slider (702), and a first elastic member (706) for resetting the second clamping rod (705) is sleeved on the second clamping rod (705).

3. The leg press trainer for physical education teaching according to claim 1, characterized in that, A limiting mechanism is further included, the limiting mechanism is arranged on the pedal board (4), the limiting mechanism includes a first mounting plate (801), the first mounting plate (801) is fixedly connected to the pedal board (4), a first sliding plate (802) is slidably arranged on the first mounting plate (801), a second elastic member (803) for resetting the first sliding plate (802) is sleeved on the lower part of the first sliding plate (802), the cooperation of the first sliding plate (802) and the second elastic member (803) is used for limiting the position of the heel, a second mounting plate (806) is fixedly connected to one side of the first mounting plate (801) opposite to the first mounting plate (801), a second sliding plate (807) is slidably inserted through the second mounting plate (806), a third elastic member (808) for resetting the second sliding plate (807) is sleeved on the upper part of the second sliding plate (807), the cooperation of the second sliding plate (807) and the third elastic member (808) is used for limiting the position of the toe, a clamping plate (804) is fixedly connected to the pedal board (4), and a third clamping rod (805) for fixing the second sliding plate (807) is slidably inserted through the clamping plate (804).

4. A reverse leg press trainer for physical education teaching according to claim 2, characterized in that, It further includes a pressure relief mechanism, which is arranged on the slider (702). The pressure relief mechanism includes a first mounting block (901) fixed on the slider (702). A shifting block (902) that is in sliding contact with the first clamping rod (6) is fixedly connected to the first mounting block (901). Driving the shifting block (902) to move through the first mounting block (901) can cause the shifting block (902) to squeeze the first clamping rod (6) to rotate. A rotating rod (903) is rotatably connected to the first mounting block (901). A third mounting plate (904) is penetrated through the rotating rod (903). An anti-wear soft pad (906) is slidably penetrated through the third mounting plate (904). A limiting plate (905) for limiting the position of the third mounting plate (904) is fixedly connected to the first mounting block (901). A fourth elastic member (907) for resetting the anti-wear soft pad (906) is sleeved on the front part of the anti-wear soft pad (906). During training, pressure relief can be achieved by moving and compressing the fourth elastic member (907) through the anti-wear soft pad (906).

5. The inverted leg press trainer for physical education teaching according to claim 4, characterized in that, The limiting plate (905) is located below the third mounting plate (904).

6. The leg press trainer for physical education teaching according to claim 1, characterized in that, It further includes a positioning mechanism, which is arranged on the pedal (4). The positioning mechanism includes a first rack (1001) slidably arranged on the pedal (4). A second rack (1003) is slidably arranged on the pedal (4). Guide plates (1002) for clamping the feet are fixedly connected to both the first rack (1001) and the second rack (1003). A limiting frame (1004) is fixedly connected to the pedal (4). A gear (1005) that meshes with the first rack (1001) and the second rack (1003) is rotatably arranged on the limiting frame (1004). During use, rotating the gear (1005) can, under the meshing action, cause the first rack (1001) and the second rack (1003) to drive their respective guide plates (1002) to move inwards or outwards.

7. The inverted leg press trainer for physical education teaching according to claim 6, characterized in that, The guide plate (1002) is inclined.

8. A reverse leg press trainer for physical education teaching according to claim 1, characterized in that, It further includes an auxiliary pushing mechanism, which is arranged on the storage rod (5). The auxiliary pushing mechanism includes a connecting plate (1101), the connecting plate (1101) is fixedly connected to the storage rod (5), a pulling rope (1102) is connected to the connecting plate (1101), a handle (1103) is arranged at the end of the pulling rope (1102), and by pulling the pulling rope (1102) through the handle (1103), the pulling rope (1102) is used to pull the pedal (4) to move for training assistance. Mounting brackets (1104) are fixedly connected to both sides of the leg press machine base (1), a wire guiding roller (1105) is arranged on the mounting bracket (1104) in a penetrating manner, a limiting block (1106) is slidably arranged on the wire guiding roller (1105), and the pulling rope (1102) passes through the limiting block (1106) so that the limiting block (1106) limits the pulling rope (1102).

9. The inverted leg press trainer for physical education teaching according to claim 8, characterized in that, The handle (1103) is U-shaped.

10. The leg press trainer for physical education teaching according to claim 1, characterized in that, It further includes a force detection mechanism, which is arranged on the leg press machine base (1). The force detection mechanism includes a mounting rod (1201), two clamping plates (1202) are slidably arranged on the mounting rod (1201), a fifth elastic member (1203) for resetting the clamping plates (1202) is sleeved on the mounting rod (1201), a second mounting block (1204) is slidably arranged jointly by the two clamping plates (1202), a display screen (1205) for displaying force values is arranged on the second mounting block (1204), a pressure module (1206) for detecting the leg press force is arranged on the second mounting block (1204), and the pressure module (1206) can be clamped on the leg press machine base (1) and the round rod slide rail (3) through the cooperation of the clamping plates (1202) and the fifth elastic member (1203).

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