Leg strength training device

Abstract

The invention relates to the technical field of leg training, and discloses a leg strength training device which comprises a base, a movable plate is fixed to one side of a movable block, second pistons are symmetrically fixed to the two sides of one end face of the movable plate, and the second pistons are slidably connected into an airtight channel. And one side of the airtight channel is connected with an anti-sudden-falling mechanism through a second connecting pipeline, a fourth spring is fixed to the inner bottom of the groove, a tray is fixed to the top of the fourth spring, and barbell discs are arranged on the tray in a sleeving mode. According to the leg strength training device, the leg hooking trainer and the weight lifting equipment are combined, the functions are diversified, the weight lifting equipment can be independently used for weight lifting training after the barbell rod ascends and descends, the bearing frame moves rightwards and the disc and the barbell rod are placed on the ground while the leg strength is trained through the leg hooking rod, and when the leg hooking and weight lifting training is carried out, the weight lifting training can be carried out through the weight lifting equipment. The barbell rod cannot drop suddenly, and the safety protection effect is achieved conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of leg training, in particular to a leg strength training device. Background Art

[0002] Martial arts, sports, and other related fields all rely on muscle strength training. Physical exercise is a form of physical activity aimed at developing the body, improving health, enhancing physical fitness, regulating the mind, enriching cultural life, and utilizing leisure time. Physical exercise can be flexible and varied in form and content, and can be done individually or in groups. Commonly exercised areas include the back, waist, abdomen, and legs, with leg training being a key area.

[0003] Existing leg strength training devices include leg hook trainers, which have relatively simple functions and can generally only achieve leg strength training. They are difficult to use in combination with weightlifting equipment. When used in combination with weightlifting equipment, if people become physically exhausted during the weightlifting process, the barbell is prone to fall rapidly, which can easily hit the trainees and cause injuries to the trainees. The overall safety protection performance is poor. In view of the above problems, the existing equipment needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a leg strength training device to solve the problem that the existing leg strength training device proposed in the above background technology includes a leg hook trainer, which has a relatively simple function and can generally only achieve leg strength training. It is difficult to use it in combination with weightlifting equipment. When used in combination with weightlifting equipment, if people become physically exhausted during the weightlifting process, the barbell is prone to fall rapidly, which can easily hit the trainees and cause injuries to the trainees, resulting in poor overall safety protection performance.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a leg strength training device, comprising a base, an upper end face of the base being fixed with a first soft pad and a second soft pad, handles being symmetrically fixed on both sides of the upper end face of the first soft pad, support plates being symmetrically fixed on both sides of the upper end face of the base, a leg hook rod being rotatably connected between the two support plates, a sponge cover being covered on the outer side of the leg hook rod, a first belt transmission assembly being rotatably connected on the outer end face of the support plate, the leg hook rod passing through the support plate and connected to the first belt transmission assembly, an output end of the first belt transmission assembly being connected to an incomplete gear, a first tooth plate being meshed and connected to one side of the incomplete gear, a support plate being fixed on the top of the first tooth plate, a disc being clamped on the support plate, a barbell rod being fixed on the two discs, a ring being covered on the outer side of the barbell rod, and nuts being symmetrically threaded at both ends of the barbell rod.

[0006] The upper end surface of the base is slidably connected to an anti-emergency fall mechanism, and the anti-emergency fall mechanism includes a carrier frame, and storage cylinders are symmetrically fixed on both sides of the upper end surface of the carrier frame. The inner side of the storage cylinder is rotatably connected to a winding rod through a spiral spring, and a hanging rope is wrapped around the outer side of the winding rod. A first channel is opened on the top of the carrier frame, and the hanging rope passes through the bottom of the storage cylinder and the first channel and is connected to the ring.

[0007] As a preferred solution of the present invention, a limiting groove is provided on the upper end surface of the base, and the first tooth plate is slidably connected in the limiting groove.

[0008] As a preferred solution of the present invention, the first screw rods are symmetrically connected to the two sides of the base for rotation, and the two first screw rods are threadedly connected to the supporting frame, and the two first screw rods are connected by a second belt transmission assembly, and a turning handle is fixed on one side of the second belt transmission assembly, and the turning handle is fixed to the base through a support rod.

[0009] As a preferred solution of the present invention, receiving grooves are symmetrically provided on both sides of the sling, and blocks are rotatably connected in the receiving grooves, a first magnet is fixed on the blocks, and the blocks are evenly spaced on both sides of the sling.

[0010] As a preferred solution of the present invention, a first airtight sleeve and a second airtight sleeve are fixed on the top of the carrier, and a first connecting pipe is fixed between the top of the first airtight sleeve and the top of the second airtight sleeve, and an air outlet is opened on the top of the second airtight sleeve.

[0011] As a preferred solution of the present invention, a rotating shaft is rotatably connected in the first airtight sleeve and the second airtight sleeve, and a first piston is fixed on one side of the rotating shaft. The first piston is rotatably connected in the first airtight sleeve and the second airtight sleeve. The rotating shaft is rotatably connected to the top of the carrier, and a turntable is fixed on the outside of the rotating shaft. The turntables are distributed on the rotating shaft at equal intervals, and each turntable is provided with a notch, and the notches on two adjacent turntables are staggered with each other. An extrusion block is slidably connected in the top of the carrier, and a ball block is fixed on the outside of the extrusion block. The ball block is snap-connected to the notch on one of the turntables.

[0012] As a preferred solution of the present invention, an electric telescopic column is fixed to the inner top of the carrier frame, and a moving block is fixed to the top of the electric telescopic column, both sides of the moving block are connected to the clamping block through a first spring, and the clamping block is clamped and connected to the top of the carrier frame, a moving column is fixed to the top of the moving block, and the moving column is connected to the second tooth plate through a connecting plate, a clamping strip is fixed to the outer side of the second tooth plate, a second channel is opened at the top of the carrier frame, and the second tooth plate extends into the second channel.

[0013] As a preferred solution of the present invention, a second screw rod is rotatably connected to the top of the carrier frame, and a circular gear is fixed to the outer end of the second screw rod, a limiting rod is fixed to the outer end face of the circular gear, and the limiting rod is evenly distributed on the circular gear in the circumference, the outer side of the second screw rod is threadedly connected to a moving rod, and the moving rod is slidably connected to the top of the carrier frame, the inner end of the moving rod is connected to the resistance block through a second spring, a second magnet is fixed to the top of the carrier frame, and the second magnet and the resistance block are arranged in a one-to-one correspondence.

[0014] As a preferred solution of the present invention, grooves are symmetrically provided on both sides of the base, and a resistance adjustment mechanism is fixed in the groove, the resistance adjustment mechanism includes a fixed plate, and the fixed plates are symmetrically fixed on both sides of the bottom of the groove, an airtight channel is provided in one of the fixed plates, and a third spring is fixed to the inner end face of one of the fixed plates, a movable block is fixed to one end of the third spring, and a movable plate is fixed to one side of the movable block, second pistons are symmetrically fixed on both sides of one end face of the movable plate, and the second piston is slidably connected in the airtight channel, one side of the airtight channel is connected to the first airtight sleeve through a second connecting pipe, a fourth spring is fixed to the inner bottom of the groove, a tray is fixed to the top of the fourth spring, and a barbell plate is placed on the tray.

[0015] As a preferred solution of the present invention, a limiting sleeve is fixed to the inner end surface of the fixing plate, and extrusion plates are symmetrically fixed on both sides of the lower end surface of the tray, and the extrusion plates pass through the limiting sleeve.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This leg strength training device can achieve the purpose of integrating multiple trainings and safety protection. The device combines the leg hook trainer with the weightlifting equipment, and has various functions. While using the leg hook bar to train leg strength, the barbell bar rises and falls. After moving the carrier frame to the right and placing the disc and barbell bar on the ground, the weightlifting equipment can be used alone for weightlifting training. When performing leg hook and weightlifting training, the barbell bar will not drop suddenly, which facilitates the achievement of safety protection effect.

[0017] 2. The leg strength training device can achieve the purpose of resistance adjustment. The tray supports the barbell plates. Before leg training and weightlifting training, the corresponding number of barbell plates can be installed on the barbell bar according to personal needs. Every time a barbell plate is removed from the tray, the moving block moves down a certain distance, the second gear plate descends to drive the circular gear to rotate, the moving rod moves, and the resistance block extends into the first channel. During the release of the rope, the resistance block exerts a certain resistance on the stopper, which facilitates slowing down the descent speed of the barbell bar and prevents it from falling suddenly and injuring the trainee. The more barbell plates installed, the more resistance blocks extend into the first channel, and the greater the resistance to the barbell bar's descent.

[0018] 3. The leg strength training device can achieve the purpose of locking. Every time a barbell plate is taken away from the tray, the tray will automatically bounce up a certain distance, the first piston will rotate a certain angle, and the rotating shaft and the turntable will rotate accordingly, thereby adjusting the positions of the notches on all the turntables as a whole, so that the turntable notches at the descending height of the moving block can be aligned with the ball block. The first spring and the card block can be used in combination to lock the moving block. When the second gear plate descends, it can drive the circular gear to rotate, and the card strip and the limit rod can be used in combination to lock the circular gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the front cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the connection structure of the base, first cushion, grip, second cushion, turning handle, support rod, supporting frame, storage tube, first magnet, movable column, connecting plate, clamping strip, groove and resistance adjustment mechanism of the present invention; Figure 4 This is a schematic diagram of the connection structure of the first screw rod, the second belt transmission assembly, the turning handle, the support rod and the supporting frame of the present invention; Figure 5 This is a schematic diagram of the connection structure of the leg hook rod, sponge cover, first belt transmission assembly, incomplete gear, first tooth plate, support plate, disc, barbell rod, collar, nut and suspension rope of the present invention; Figure 6 It is a structural schematic diagram of the anti-fall mechanism of the present invention; Figure 7 For the present invention Figure 1 A in the middle is an enlarged structural diagram; Figure 8 For the present invention Figure 6 The enlarged structural diagram at B in the middle; Figure 9 This is a schematic diagram of the connection structure of the hanging rope, the storage slot, the stopper and the first magnet of the present invention; Figure 10 Schematic diagram of the connection structure of the first magnet, the first airtight sleeve, the first connecting pipe, the second airtight sleeve, the rotating shaft and the first piston of the present invention; Figure 11 This is a schematic diagram of the connection structure of the rotating shaft, the first piston, the rotating disk and the notch of the present invention; Figure 12 Schematic diagram of the connection structure of the second screw rod of the present invention; 2128, circular gear; 2129, limit rod; 2130, moving rod and resistance block; Figure 13 It is a structural schematic diagram of the resistance adjustment mechanism of the present invention; Figure 14Schematic diagram of the connection structure of the movable block, the movable plate and the second piston of the present invention; Figure 15 It is a schematic diagram of the connection structure of the fixed plate, the airtight channel, the third spring, the movable block, the movable plate, the second piston and the second connecting pipe of the present invention.

[0020] Figure: 1, base; 2, first cushion; 3, handle; 4, second cushion; 5, support plate; 6, leg hook rod; 7, sponge cover; 8, first belt drive assembly; 9, incomplete gear; 10, first tooth plate; 11, limit groove; 12, support plate; 13, disc; 14, barbell bar; 15, collar; 16, nut; 17, first screw rod; 18, second belt drive assembly; 19, handlebar; 20, stop rod; 21, emergency fall prevention mechanism 2101, carrier frame; 2102, storage cylinder; 2103, reeling rod; 2104, hanging rope; 2105, first channel; 2106, storage slot; 2107, stopper; 2108, first magnet; 2109, first airtight sleeve; 2110, first connecting pipe; 2111, second airtight sleeve; 2112, rotating shaft; 2113, first piston; 2114, rotating disk; 2115, notch; 211 6. Extrusion block; 2117. Ball block; 2118. Electric telescopic column; 2119. Moving block; 2120. First spring; 2121. Block; 2122. Moving column; 2123. Connecting plate; 2124. Second tooth plate; 2125. Card bar; 2126. Second channel; 2127. Second screw rod; 2128. Circular gear; 2129. Limit rod; 2130. Moving rod; 2131. Second spring; 21 32. Resistance block; 2133. Second magnet; 22. Groove; 23. Resistance adjustment mechanism; 2301. Fixed plate; 2302. Limit sleeve; 2303. Airtight channel; 2304. Third spring; 2305. Movable block; 2306. Moving plate; 2307. Second piston; 2308. Second connecting pipe; 2309. Fourth spring; 2310. Tray; 2311. Extrusion plate; 2312. Barbell plate. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] See also Figures 1 to 15The present invention provides a technical solution: a leg strength training device, comprising a base 1, a first soft pad 2 and a second soft pad 4 are fixed to the upper end surface of the base 1, handles 3 are symmetrically fixed on both sides of the upper end surface of the first soft pad 2, support plates 5 are symmetrically fixed on both sides of the upper end surface of the base 1, a leg hook rod 6 is rotatably connected between the two support plates 5, and a sponge cover 7 is covered on the outer side of the leg hook rod 6. When the leg hook rod 6 is used to perform leg flexion and extension training, the sponge cover 7 plays a protective role for the legs.

[0023] Specific reference Figure 1 and Figure 5 The outer end surface of the support plate 5 is rotatably connected to the first belt transmission assembly 8, the leg hook rod 6 passes through the support plate 5 and is connected to the first belt transmission assembly 8, the output end of the first belt transmission assembly 8 is connected to the incomplete gear 9, and one side of the incomplete gear 9 is meshed with the first toothed plate 10. When the leg hook rod 6 is used to perform leg flexion and extension training, the leg hook rod 6 rotates to drive the first belt transmission assembly 8 to operate, thereby driving the incomplete gear 9 to rotate, thereby realizing the lifting and lowering of the first toothed plate 10.

[0024] In this embodiment, a limiting groove 11 is provided on the upper end surface of the base 1 , and the first tooth plate 10 is slidably connected in the limiting groove 11 . The limiting groove 11 serves as a limit in the process of raising and lowering the first tooth plate 10 .

[0025] Specific reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 A support plate 12 is fixed to the top of the first gear plate 10, and a disc 13 is clamped on the support plate 12. A barbell rod 14 is fixed on the two discs 13, and a ring 15 is placed on the outer side of the barbell rod 14. Nuts 16 are symmetrically threaded at both ends of the barbell rod 14. First screw rods 17 are symmetrically rotatably connected on both sides of the inside of the base 1, and the two first screw rods 17 are threadedly connected to the carrier 2101, and the two first screw rods 17 are connected by a second belt transmission assembly 18. A turning handle 19 is fixed to one side of the second belt transmission assembly 18, and the turning handle 19 is fixed to the base 1 through a push rod 20. When the turning handle 19 is held and the second belt transmission assembly 18 is rotated, the two first screw rods 17 rotate synchronously, and the carrier 2101 can move to the right under the limiting action of the base 1 and the first screw rod 17, which is convenient for placing the disc 13 and the barbell rod 14 on the ground for use. Tightening the push rod 20 can tightly fix the turning handle 19.

[0026] Specific reference Figures 1 to 12The upper end surface of the base 1 is slidably connected to an anti-emergency fall mechanism 21, which includes a carrier 2101. Storage cylinders 2102 are symmetrically fixed on both sides of the upper end surface of the carrier 2101. The inner side of the storage cylinder 2102 is rotatably connected to a winding rod 2103 through a vortex spring. A hanging rope 2104 is wound around the outer side of the winding rod 2103. A first channel 2105 is opened on the top of the carrier 2101. The hanging rope 2104 passes through the bottom of the storage cylinder 2102 and the first channel 2105 and is connected to the ring 15. Storage grooves 2106 are symmetrically opened on both sides of the hanging rope 2104, and the storage grooves 2106 The inner rotation is connected to a stopper 2107, on which a first magnet 2108 is fixed, and the stoppers 2107 are evenly spaced on both sides of the hanging rope 2104. When the hanging rope 2104 is released and enters the first channel 2105, the stopper 2107 will remain in a horizontal state under the attraction of the first magnet 2108 and the second magnet 2133. The extended resistance block 2132 has a certain blocking effect on the stopper 2107, which facilitates slowing down the release speed of the hanging rope 2104. After the hanging rope 2104 leaves the first channel 2105, the stopper 2107 will automatically rotate to the storage slot 2106.

[0027] In this embodiment, a first airtight sleeve 2109 and a second airtight sleeve 2111 are fixed to the top of the carrier frame 2101, and a first connecting pipe 2110 is fixed between the top of the first airtight sleeve 2109 and the top of the second airtight sleeve 2111. An air outlet is provided at the top of the second airtight sleeve 2111. The first connecting pipe 2110 serves to connect the first airtight sleeve 2109 and the second airtight sleeve 2111, and the air outlet can be used for exhaust.

[0028] In this embodiment, the first airtight sleeve 2109 and the second airtight sleeve 2111 are both rotatably connected with a rotating shaft 2112, and a first piston 2113 is fixed on one side of the rotating shaft 2112. The first piston 2113 is rotatably connected to the first airtight sleeve 2109 and the second airtight sleeve 2111. The rotating shaft 2112 is rotatably connected to the top of the carrier 2101, and a turntable 2114 is fixed on the outside of the rotating shaft 2112. The turntables 2114 are evenly spaced on the rotating shaft 2112, and each turntable 2114 is provided with a notch 2115, and the notches 2115 on two adjacent turntables 2114 are staggered with each other. The top of the carrier 2101 is slidably connected with an extrusion plate 2114. The pressing block 2116 is provided, and a ball block 2117 is fixed on the outside of the squeezing block 2116. The ball block 2117 is engaged and connected to the notch 2115 on one of the turntables 2114. After the air pressure is put into the first airtight sleeve 2109 and the second airtight sleeve 2111, the first piston 2113 rotates under the action of pneumatics, thereby driving the rotating shaft 2112 to rotate, thereby driving all the turntables 2114 to rotate, and facilitating the overall adjustment of the position of the notch 2115 on all the turntables 2114. After the notch 2115 corresponds to the ball block 2117, the ball block 2117 can be extended into the notch 2115, and the first spring 2120 and the clamping block 2121 can be used to lock the moving block 2119.

[0029] In this embodiment, an electric telescopic column 2118 is fixed to the inner top of the carrier 2101, and a moving block 2119 is fixed to the top of the electric telescopic column 2118. Both sides of the moving block 2119 are connected to the card block 2121 through a first spring 2120, and the card block 2121 is connected to the top of the carrier 2101. A moving column 2122 is fixed to the top of the moving block 2119, and the moving column 2122 is connected to the second tooth plate 2124 through a connecting plate 2123. A card strip 2125 is fixed to the outside of the second tooth plate 2124. A second channel 2126 is opened on the top of the carrier 2101. The tooth plate 2124 extends into the second channel 2126, and the moving block 2119 can move up and down under the telescopic action of the electric telescopic column 2118. When the card block 2121 corresponds to the extrusion block 2116, the card block 2121 will automatically pop open under the action of the first spring 2120, which is convenient for locking the moving block 2119. When the moving block 2119 moves up and down, it can drive the moving column 2122 and the second tooth plate 2124 to move up and down, thereby driving the card strip 2125 to move up and down. The up and down movement of the second tooth plate 2124 can drive the circular gear 2128 to rotate. The card strip 2125 and the limit rod 2129 are used in combination to lock the circular gear 2128.

[0030] In this embodiment, a second screw rod 2127 is rotatably connected to the top of the carrier 2101, and a circular gear 2128 is fixed to the outer end of the second screw rod 2127. A limiting rod 2129 is fixed to the outer end surface of the circular gear 2128, and the limiting rod 2129 is evenly distributed on the circular gear 2128 in the circumferential direction. The outer side of the second screw rod 2127 is threadedly connected to a moving rod 2130, and the moving rod 2130 is slidably connected to the top of the carrier 2101. The inner end of the moving rod 2130 is connected to the resistance block 2132 through a second spring 2131. The top of the carrier 2101 A second magnet 2133 is fixed inside, and the second magnet 2133 is arranged in a one-to-one correspondence with the resistance block 2132. The rotation of the circular gear 2128 can drive the second screw rod 2127 to rotate. At this time, the movable rod 2130 can move left and right under the limiting action of the support frame 2101 and the second screw rod 2127. After the resistance block 2132 extends into the first channel 2105, when the rope 2104 is released, the resistance block 2132 has a certain blocking effect on the block 2107, which facilitates slowing down the release speed of the rope 2104 and preventing the disc 13 and the barbell bar 14 from falling suddenly and injuring the trainees.

[0031] The leg strength training device of the present invention can remove a corresponding number of barbell plates 2312 as needed and install them on the barbell rod 14 before using the device. The more barbell plates 2312 are removed, the greater the rotation angle of the first piston 2113. At the same time, the moving block 2119 descends and is stuck at the corresponding height, and the corresponding number of resistance blocks 2132 extend into the first channel 2105. After the legs release the leg hook rod 6, the resistance blocks 2132 block the block 2107. When the barbell rod 14 descends, it will be affected by the resistance and slow down, thereby achieving a safety protection effect during leg strength training and weightlifting training.

[0032] Specific reference Figure 1 、 Figure 3 、 Figure 7 、 Figure 13 、 Figure 14 and Figure 15, grooves 22 are symmetrically provided on both sides of the base 1, and a resistance adjustment mechanism 23 is fixed in the groove 22, the resistance adjustment mechanism 23 includes a fixed plate 2301, and the fixed plate 2301 is symmetrically fixed on both sides of the bottom of the groove 22, an airtight channel 2303 is provided in one of the fixed plates 2301, and a third spring 2304 is fixed to the inner end surface of one of the fixed plates 2301, a movable block 2305 is fixed to one end of the third spring 2304, and a movable plate 2306 is fixed to one side of the movable block 2305, and a second piston 2307 is symmetrically fixed on both sides of one end surface of the movable plate 2306, and the second piston 2307 is slidably connected in the airtight channel 2303, and one side of the airtight channel 2303 is connected to the first airtight sleeve 2109 through a second connecting pipe 2308, the groove 2 2 is fixed to the inner bottom of the fourth spring 2309, and the top of the fourth spring 2309 is fixed to the tray 2310. The tray 2310 is covered with a barbell plate 2312. The second connecting pipe 2308 serves to connect the airtight channel 2303 and the first airtight sleeve 2109. The fourth spring 2309 supports the tray 2310, and the tray 2310 supports the barbell plate 2312. Multiple barbell plates 2312 are stacked on the tray 2310. Each time a barbell plate 2312 is removed, the tray 2310 will bounce a certain distance under the support of the fourth spring 2309, and the squeezing plate 2311 will move upward and squeeze the corresponding movable block 2305. The movable plate 2306 and the second piston 2307 will move accordingly, facilitating the compression of air into the first airtight sleeve 2109.

[0033] In this embodiment, a limiting sleeve 2302 is fixed to the inner end surface of the fixed plate 2301, and extrusion plates 2311 are symmetrically fixed on both sides of the lower end surface of the tray 2310, and the extrusion plates 2311 pass through the limiting sleeve 2302. The limiting sleeve 2302 plays a limiting role in the process of raising and lowering the extrusion plates 2311.

[0034] In the leg strength training device of the present invention, each time a barbell plate 2312 is taken away, the tray 2310 will automatically bounce up a certain distance, the squeezing plate 2311 will squeeze the corresponding number of movable blocks 2305, the corresponding second pistons 2307 will move, and the first piston 2113 will rotate under the action of pneumatics, thereby driving the rotating shaft 2112 and all the turntables 2114 to rotate, so that the notches 2115 on the turntables 2114 of the corresponding height can correspond to the ball blocks 2117, so that the movable blocks 2119 can be locked at the corresponding height.

[0035] The use method and advantages of the present invention: The leg strength training device works as follows: like Figures 1 to 15As shown: six barbell plates 2312 can be stacked on the tray 2310. First, according to the training needs, the corresponding number of barbell plates 2312 are taken out and installed on the barbell bar 14. Every time a barbell plate 2312 is taken out, the tray 2310 bounces up to a certain height, the squeezing plate 2311 squeezes the corresponding movable block 2305, the movable plate 2306 and the second piston 2307 move to the right, and the first piston 2113 rotates under the action of pneumatics, thereby driving the rotation shaft 2112 and the turntable 2114 to rotate. At the same time, the movable block 2119 drops a certain distance under the contraction action of the electric telescopic column 2118, and the clamping block 2121 automatically pops open after corresponding to the squeezing block 2116. Lock the moving block 2119, the ball block 2117 will be stuck in the notch 2115 on the corresponding turntable 2114, and the moving column 2122, the connecting plate 2123 and the second gear plate 2124 will drop together with the moving block 2119, thereby driving the corresponding circular gear 2128 to rotate, the moving rod 2130 moves, and the resistance block 2132 extends into the first channel 2105. The rotating circular gear 2128 can be locked by using the card strip 2125 and the limit rod 2129. If you need to do leg strength training, you should first lie on the first soft pad 2 and the second soft pad 4, then hold the handle 3 and support your body with your elbows, and at the same time hook your feet on the leg hook rod 6. In the process of hooking and pulling the leg hook rod 6, The first belt transmission assembly 8 operates, thereby driving the incomplete gear 9 to rotate, thereby driving the first tooth plate 10 to move upward, and the support plate 12 lifts the disc 13, the barbell rod 14 and the barbell plate 2312 to move upward, thereby achieving leg strength training. At this time, the winding rod 2103 can automatically wind up the sling rope 2104. After loosening the leg hook rod 6, the disc 13, the barbell rod 14 and the barbell plate 2312 automatically fall under the action of gravity, and the winding rod 2103 releases the winding sling rope 2104. The resistance block 2132 extending into the first channel 2105 has a certain blocking effect on the block 2107, thereby slowing down the release speed of the sling rope 2104, thereby slowing down the descending speed of the barbell rod 14. , to prevent the barbell bar 14 from falling suddenly and injuring the trainees. The more barbell plates 2312 installed, the more resistance blocks 2132 extending into the first channel 2105, and the greater the falling resistance of the barbell bar 14. If the barbell bar 14 needs to be used alone, first reel in the sling 2104 to make the disc 13 leave the support plate 12, then hold the handle 19 and rotate the second belt transmission assembly 18, and the two first screw rods 17 rotate synchronously, thereby driving the carrier 2101 to move to the right, and then tighten the push rod 20 to fix the handle 19, and then release the sling 2104 to lower the disc 13 and the barbell bar 14 to the ground, and then the disc 13, barbell bar 14 and barbell plates 2312 can be used for weightlifting training.

[0036] In summary, the leg strength training device achieves the purpose of integrating multiple trainings, safety protection, resistance adjustment and locking, and meets people's usage needs.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

[0038] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the protection content of the present invention.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A leg strength training device, comprising a base (1), characterized in that: The upper end surface of the base (1) is fixed with a first soft pad (2) and a second soft pad (4), and handles (3) are symmetrically fixed on both sides of the upper end surface of the first soft pad (2). Support plates (5) are symmetrically fixed on both sides of the upper end surface of the base (1), and a leg hook rod (6) is rotatably connected between the two support plates (5). The outer side of the leg hook rod (6) is covered with a sponge cover (7), and the outer end surface of the support plate (5) is rotatably connected to the first belt transmission component (8). The leg hook rod (6) passes through the support plate (5) and is connected to the first belt transmission component. (8), the output end of the first belt transmission assembly (8) is connected to the incomplete gear (9), one side of the incomplete gear (9) is meshed with a first tooth plate (10), a support plate (12) is fixed on the top of the first tooth plate (10), a disc (13) is clamped on the support plate (12), a barbell rod (14) is fixed on two of the discs (13), a ring (15) is placed on the outer side of the barbell rod (14), and nuts (16) are symmetrically threaded at both ends of the barbell rod (14); The upper end surface of the base (1) is slidably connected to an anti-emergency fall mechanism (21), and the anti-emergency fall mechanism (21) includes a carrier (2101), and storage cylinders (2102) are symmetrically fixed on both sides of the upper end surface of the carrier (2101), the inner side of the storage cylinder (2102) is rotatably connected to a winding rod (2103) through a spiral spring, and a suspension rope (2104) is wound around the outer side of the winding rod (2103), and a first channel (2105) is opened at the top of the carrier (2101), and the suspension rope (2104) passes through the bottom of the storage cylinder (2102) and the first channel (2105) and is connected to the ring (15).

2. A leg strength training device according to claim 1, characterized in that: A limiting groove (11) is provided on the upper end surface of the base (1), and the first tooth plate (10) is slidably connected in the limiting groove (11).

3. The leg strength training device according to claim 1, characterized in that: The base (1) has first screw rods (17) symmetrically connected to both sides thereof for rotation, and the two first screw rods (17) are both threadedly connected to the carrier frame (2101), and the two first screw rods (17) are connected to each other via a second belt transmission assembly (18), a turning handle (19) is fixed to one side of the second belt transmission assembly (18), and the turning handle (19) is fixed to the base (1) via a stop rod (20).

4. The leg strength training device according to claim 1, characterized in that: The two sides of the hanging rope (2104) are symmetrically provided with receiving grooves (2106), and the receiving grooves (2106) are rotatably connected with stoppers (2107), the first magnets (2108) are fixed on the stoppers (2107), and the stoppers (2107) are evenly spaced on both sides of the hanging rope (2104).

5. The leg strength training device according to claim 1, characterized in that: A first airtight sleeve (2109) and a second airtight sleeve (2111) are fixed to the top of the carrier (2101), and a first connecting pipe (2110) is fixed between the top of the first airtight sleeve (2109) and the top of the second airtight sleeve (2111), and an air outlet is provided at the top of the second airtight sleeve (2111).

6. The leg strength training device according to claim 5, characterized in that: The first airtight sleeve (2109) and the second airtight sleeve (2111) are both rotatably connected with a rotating shaft (2112), and a first piston (2113) is fixed on one side of the rotating shaft (2112). The first piston (2113) is rotatably connected in the first airtight sleeve (2109) and the second airtight sleeve (2111). The rotating shaft (2112) is rotatably connected to the top of the carrier (2101), and a rotating disk (2114) is fixed on the outside of the rotating shaft (2112). (2114) are evenly spaced on the rotating shaft (2112), and each turntable (2114) is provided with a notch (2115), and the notches (2115) on two adjacent turntables (2114) are staggered with each other, an extrusion block (2116) is slidably connected to the top of the support frame (2101), and a ball block (2117) is fixed to the outside of the extrusion block (2116), and the ball block (2117) is snap-fitted into the notch (2115) on one of the turntables (2114).

7. The leg strength training device according to claim 1, characterized in that: An electric telescopic column (2118) is fixed to the inner top of the carrier (2101), and a moving block (2119) is fixed to the top of the electric telescopic column (2118). Both sides of the moving block (2119) are connected to the clamping block (2121) through a first spring (2120), and the clamping block (2121) is clamped and connected inside the top of the carrier (2101). A moving column (2122) is fixed to the top of the moving block (2119), and the moving column (2122) is connected to the second tooth plate (2124) through a connecting plate (2123). A clamping strip (2125) is fixed to the outer side of the second tooth plate (2124). A second channel (2126) is opened at the top of the carrier (2101), and the second tooth plate (2124) extends into the second channel (2126).

8. The leg strength training device according to claim 5, characterized in that: A second screw rod (2127) is rotatably connected to the top of the carrier (2101), and a circular gear (2128) is fixed to the outer end of the second screw rod (2127). A limiting rod (2129) is fixed to the outer end surface of the circular gear (2128), and the limiting rod (2129) is evenly distributed on the circular gear (2128) in the circumferential direction. The outer side of the second screw rod (2127) is threadedly connected to a moving rod (2130), and the moving rod (2130) is slidably connected to the top of the carrier (2101). The inner end of the moving rod (2130) is connected to the resistance block (2132) through a second spring (2131). A second magnet (2133) is fixed to the top of the carrier (2101), and the second magnet (2133) and the resistance block (2132) are arranged in a one-to-one correspondence.

9. The leg strength training device according to claim 1, characterized in that: Grooves (22) are symmetrically provided on both sides of the base (1), and a resistance adjustment mechanism (23) is fixed in the groove (22). The resistance adjustment mechanism (23) comprises a fixing plate (2301), and the fixing plate (2301) is symmetrically fixed on both sides of the bottom of the groove (22), an airtight channel (2303) is provided in one of the fixing plates (2301), and a third spring (2304) is fixed to the inner end surface of one of the fixing plates (2301), a movable block (2305) is fixed to one end of the third spring (2304), and one end of the movable block (2305) is fixed to the inner end surface of the third spring (2304). A movable plate (2306) is fixed on one side of the movable plate (2306), and second pistons (2307) are symmetrically fixed on both sides of one end surface of the movable plate (2306), and the second pistons (2307) are slidably connected in the airtight channel (2303), and one side of the airtight channel (2303) is connected to the first airtight sleeve (2109) through a second connecting pipe (2308), and a fourth spring (2309) is fixed to the inner bottom of the groove (22), and a tray (2310) is fixed on the top of the fourth spring (2309), and a barbell plate (2312) is placed on the tray (2310).

10. The leg strength training device according to claim 9, characterized in that: A limiting sleeve (2302) is fixed to the inner end surface of the fixing plate (2301), and extrusion plates (2311) are symmetrically fixed to both sides of the lower end surface of the tray (2310), and the extrusion plates (2311) pass through the limiting sleeve (2302).

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