A training device for track and field start

Abstract

The present application relates to the technical field of sports equipment, in particular to a track starting training device, which comprises a base, a footrest seat, a pedal, a support, a clamping block, the base is provided with the footrest seat on both side walls, the footrest seat is provided with the pedal rotatably installed thereon, the pedal is provided with the support rotatably installed thereon, the support is provided with the clamping block, and the footrest seat is provided with a clamping groove for fixing the support. The footrest is slidably arranged on the base, so that the footrest can move at different positions of the base. After the athlete adjusts the starting posture, the footrest is fixed on the track by the weight of the athlete, so that the athlete can freely adjust the front-back distance of the feet, and the athlete does not need to repeatedly turn around to adjust the front-back position of the footrest, so that the athlete can always be in the best posture when starting.

Description

Technical Field

[0001] This invention relates to the field of sports equipment technology, specifically to a track and field starting training device. Background Technology

[0002] Starting blocks are commonly used training equipment in track and field training. Their main structure consists of a base and foot pedals. There are several grooves on the two side plates of the base. By fixing the foot pedals to different grooves, the distance between the front and back of the athlete's two feet can be adjusted when starting.

[0003] Existing starting blocks cannot freely adjust the distance between the foot pedals. Since each athlete has different height, leg length and other factors, the adjustment of the foot pedals at the start is different. At this time, the fixed-spaced grooves on the base obviously cannot meet the needs of all athletes. This defect will affect the comfort of athletes at the start, thus affecting the final result.

[0004] A race starting device disclosed in patent number 2020218023 achieves free adjustment of the foot pedals by sliding them onto the base. The foot pedals are fixed by the friction between the bolts and the base. The process of fixing or unfixing requires manual turning of the bolts. Even if the athlete's arm strength is greater than that of an average person, the fixing effect is ultimately limited. In addition, the existing starting device requires manual adjustment and turning around to adjust the position of the foot pedals, which interrupts the athlete's finding of the best starting posture before the start. This causes the adjusted foot pedal position to deviate from the actual required position, affecting the athlete's starting feeling.

[0005] Therefore, a track and field starting training device is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a track and field starting training device that allows the foot pedals to be quickly fixed in any position on the base after the athlete has adjusted to the optimal starting posture, without interrupting the athlete's starting posture.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A track and field starting training device includes: a base, foot pedals, pedals, a bracket, and locking blocks. Foot pedals are installed on both side walls of the base. Pedals are rotatably installed on the foot pedals. A bracket is rotatably installed on the pedals. Locking blocks are installed on the bracket. The foot pedals have multiple slots that cooperate with the locking blocks to fix the bracket.

[0009] Preferably, a sliding plate is fixedly installed on the side wall of the foot pedal seat, and the base has a sliding plate groove that mates with the sliding plate. A sliding groove is formed on the base, and a slider with an inverted T-shape is installed within the sliding groove. A movable groove is formed on the bottom of the sliding plate, and the top of the slider is inserted into the movable groove. A spring is fixedly installed within the movable groove, abutting against the top of the slider. The elastic modulus of the spring is [missing value]. Where Y is the athlete's weight, b is the initial distance between the footrest and the track, the skateboard is Z-shaped, and when the skateboard is in its initial position, the distance between the top wall of the skateboard groove and the top wall of the base is equal to 2 / 3 of the initial distance between the base and the track. The inner wall of the moving groove is provided with a fixing groove, and a steel ball is installed in the fixing groove by a spring. The slider is provided with a circular groove for fixing the steel ball. The footrest is provided with a fixing unit, which fixes the footrest to the track by the vertical gravity applied to the footrest when the athlete leans backward.

[0010] Furthermore, two guide plates are symmetrically fixedly installed on the base, and a spring is fixedly installed on the base. The spring is located between the guide plate and the side wall of the base, and the spring is in contact with the slide plate.

[0011] The guide plate and its adjacent base sidewall form a slide groove. The slide moves within the slide groove. The slide is Z-shaped. When the slide is in its initial position, the distance between the top wall of the slide within the slide groove and the top wall of the base is equal to 2 / 3 of the initial distance between the base and the track. This increases the contact area between the slide and the guide plate after the athlete presses the slide into the track, increasing the stability of the slide on the base. The athlete places both feet on the pedals. When the athlete adjusts their posture, their center of gravity shifts forward, and about 2 / 3 of their weight is applied to the pedals. At this time, the pedals are still lifted off the ground by spring 1, and the athlete's feet can move freely back and forth. After the athlete finds the most suitable posture, their upper body adjusts backward, making their waist perpendicular to the ground. At this time, the athlete's entire body weight is applied to the pedals, causing spring 1 to be compressed. The slide moves downward, pressing the pedal seat onto the ground. Spring 2 pushes the steel ball out of the fixed groove and embeds it into the circular groove, fixing the vertical displacement of the pedal seat. The fixed unit then restricts the forward and backward movement of the pedal seat, thereby achieving the purpose of freely adjusting the pedal seat.

[0012] When the pedal seat is not fixed to the track, it is kept at a certain distance from the ground by spring one. Since it needs to bear part of the athlete's weight, the elastic modulus of spring one needs to be very large. When the athlete adjusts his posture, his body center of gravity shifts forward, and 2 / 3 of the weight is applied to the pedal. Spring one has the ability to keep the pedal seat off the ground under this weight.

[0013] For sprinters, the average weight range is 55-75kg to achieve higher explosive power and speed. For middle-distance and long-distance runners, the average weight range is 60-80kg to achieve higher endurance and stamina. Different types of athletes require different elastic moduli of spring one. Therefore, it can be adjusted by adjusting the initial length of spring one, i.e., the distance between the pedal seat and the ground, or by replacing spring one directly.

[0014] Preferably, the guide plate and the side wall of the base are provided with a plurality of ball grooves that cooperate with the ball. The depth of the ball groove is less than the radius of the ball, and the distance between the ball groove and the ball is equal to 2 / 3 of the initial distance between the base and the track.

[0015] When the athlete adjusts their posture, the ball bearings are pressed into the ball bearing groove to increase the contact area between the ball bearings and the base or guide plate, thereby increasing the stability of the skateboard. The depth of the ball bearing groove is between 0.5R and 1R to prevent the ball bearings from getting stuck. After the athlete completes the posture adjustment, the foot pedal can still continue to move downwards through the ball bearings.

[0016] Preferably, the length of the skateboard is Where a is the length of the pedal seat, b is the distance between the pedal seat and the track, and h is the height of the pedal seat.

[0017] The skateboard is zig-shaped; for a skateboard, the length is set as follows: This length represents the maximum value at which the skateboard is fixed to the footrest when the initial distance between the footrest and the track is determined. The area formed by the guide plate and the side wall of the base is the sliding area of ​​the skateboard. The vertical surface of the skateboard is in contact with the side wall of the base. When the athlete steps on the pedal, it will generate a bending moment on the skateboard. Therefore, the part connecting the skateboard and the footrest should be as long as possible to increase the contact area between the skateboard and the base and reduce the local bending moment of the skateboard, so as to ensure that the pedal can only move in translation when the athlete steps on it. The shape of the slider and the groove is inverted T-shaped, which can prevent the skateboard from detaching from the base when the skateboard slides or when the athlete starts, ensuring the safety of the athlete.

[0018] To facilitate the skateboard's movement on the base, components such as ball bearings can be incorporated into the contact surfaces between the skateboard and the base to reduce friction. These ball bearings also reduce the contact area compared to direct contact between the skateboard and the base. The skateboard and base are made of ordinary carbon steel plates (e.g., Q235). When the two plates are stacked face-to-face, it's best to maintain a gap of at least 0.5 mm between them. This gap allows for sufficient airflow, preventing humid air from forming a seal, reducing rust formation, and helping to prevent rust adhesion. If the gap is too small, rust may stick the plates together, making them impossible to separate. Conversely, if the gap is too large, it can cause the pedals to wobble. Therefore, the ball bearings should protrude 0.5–1 mm from the skateboard surface to reduce rust formation and ensure the stability of the pedals as they slide on the base.

[0019] Furthermore, by changing sliding friction to rolling friction, it is possible to apply paint to both the skateboard and the base without worrying about the paint layer being damaged by sliding friction.

[0020] When the athlete adjusts their posture, the spring is compressed. While it serves to reset the position, the elastic force acts as resistance for the athlete, allowing for more precise adjustments and preventing the pedal seat from moving backward a large distance with the slightest push from the athlete.

[0021] A through groove is provided on the skateboard, which runs through the skateboard and is coaxial with the fixed groove and connected to the circular groove. When the athlete makes a mistake in adjusting the pedal seat or finishes training, a rod-shaped object can be inserted into the through groove to press the steel ball back into the fixed groove, thereby releasing the steel ball from restricting the vertical direction of the pedal seat.

[0022] Preferably, the fixing unit includes a rotating shaft rotatably mounted on the pedal seat, a torsion spring connected between the rotating shaft and the pedal seat, a swing arm fixedly mounted in the middle of the rotating shaft, a gripping plate hinged to one end of the swing arm, a barb on the bottom wall of the gripping plate, the barb forming an angle of 60° with the pedal seat, a vertical rod fixedly mounted on the pedal, a push rod cooperating with the swing arm fixedly mounted at one end of the vertical rod, a guide plate cooperating with the push rod fixedly mounted on the inner wall of the pedal seat, the swing arm being located in front of the rotating shaft, causing the swing arm to rotate clockwise under the action of the vertical rod, a baffle fixedly mounted on the pedal seat, a slot located below the baffle, when the pedal seat is not fixed on the track, the slot slides on the baffle, an inclined block fixedly mounted on the pedal seat, the distance between the inclined block and the baffle being equal to the diameter of the slot, and locking components for fixing the rotating shaft being provided at both ends of the rotating shaft.

[0023] Furthermore, the vertical rod includes a fixed rod that is fixedly installed on the pedal, a folding rod that is rotatably installed at the bottom of the fixed rod, and a torsion spring II is provided between the fixed rod and the folding rod.

[0024] After the athlete finds the optimal posture, they adjust their center of gravity backward, applying their entire body weight to the footplate, causing the pedal to rotate around the hinge point with the footplate seat. The vertical bar and push rod move along the guide plate, causing the pendulum to rotate downward, thus pressing the grip plate onto the track. The bottom wall of the grip plate has barbs, and the track material is rubber. The barbs of the grip plate embed into the track, fixing the entire footplate seat in place through the grip plate.

[0025] During the process of the push rod applying pressure to the swing arm, the support moves downward along the baffle. When the grab plate is fully pressed onto the track, the locking block on the support contacts the inclined block and falls onto the foot pedal seat. Since the pivot is locked at this time and the foot pedal seat is fixed by the grab plate, the distance between the athlete's feet before the start is determined. At this time, the athlete can move their body to adjust the angle between the pedal and the foot pedal seat. The distance between the baffle and the locking slot is sufficient to accommodate the locking block. The adjustment method is the same as the existing technology and will not be described in detail here.

[0026] The vertical bar consists of a fixed bar and a folding bar, with a torsion spring II between them, allowing it to rotate around the spring. This design effectively protects the swing arm, preventing damage from the athlete's weight. Furthermore, it ensures that after each press of the gripping board onto the track, the locking block on the support is always near the last locking slot, eliminating the need to calculate the relationship between the initial height of the gripping board and the length of the vertical bar, thus reducing manufacturing complexity.

[0027] It should be noted that because the pedals are angled on the footrests, when the athlete adjusts the distance between their feet, most of the weight is concentrated at the hinge point between the pedals and the footrests, i.e., the toe position. Only about one-third of the weight is applied vertically to the vertical bar, i.e., the heel position. The strength of the torsion springs in the pivot and footrests must be sufficient to support part of the athlete's weight during this process, preventing accidental contact between the footrest and the track during posture adjustments. Simply put, the elastic modulus of the torsion spring should be set to twice that of the spring, so that the pivot only rotates against the torsion spring after the footrests contact the track.

[0028] The angle between the barb and the foot pedal seat is 60°, meaning the barb is inserted into the track at a 30° angle. This reduces the bending moment on the barb when the athlete starts running and allows it to embed itself into the track more easily. Furthermore, after the pivot is unlocked, the 30° angle of the barb allows the gripping plate to easily return to its original position via the torsion spring.

[0029] It's worth mentioning that the barbs on the grab plate are similar to those on athletes' spikes. Although they can cause some damage to the track, their use is permitted.

[0030] Regarding the strength of the pendulum, the actual force applied to the pendulum is greatly reduced due to the presence of spring 1 and torsion spring 1. For safety reasons or to extend service life, the pendulum or other rods can be replaced with plates.

[0031] Preferably, the locking assembly includes two housings symmetrically fixedly mounted on the inner wall of the pedal seat. Both ends of the rotating shaft are fixedly mounted with ratchet wheels, which are located inside the housings. A spring is installed inside the housing, and a pawl is fixedly mounted on one end of the spring. A push block is slidably mounted on the outer wall of the pedal seat, and the push block extends into the interior of the housing. The push block releases the pawl from locking the ratchet wheels.

[0032] The pivot can achieve a self-locking function through the cooperation of ratchet and pawl. After the gripper is fixed on the track, the swing arm is also fixed, and the pedal can rotate freely around the foot pedal seat.

[0033] After training, press the push block inward continuously. The push block pushes the pawl away from the ratchet, releasing the ratchet from locking the shaft. Once the shaft is returned to its initial position by the torsion spring, release the push block. The pawl will then re-engage with the ratchet via the spring.

[0034] The running track is generally made of elastic material, and the tooth spacing of the ratchet is set to... This distance is equal to the depth of the runway indentation after the gripper is pressed onto the track. Thus, after the ratchet rotates to its final position, even if the pawl does not immediately lock the ratchet, the maximum rotation radius of the ratchet is only... This ensures the grab plate is securely fixed to the runway without loosening. It also ensures the hooks are fully embedded in the runway, increasing the contact area between the hooks, grab plate, and the runway, thus reducing damage to the runway.

[0035] It should be noted that the push block can move along its own axis within the pedal seat. When using the push block to release the pawl from the ratchet, it is necessary to ensure that the push block only contacts the pawl to avoid affecting the ratchet. To prevent the locking block from disengaging from the pedal seat, a protrusion can be provided on the locking block.

[0036] Preferably, the foot pedal seat has a straight hook on its bottom wall, and the straight hook is perpendicular to the ground.

[0037] Make full use of the bottom wall area of ​​the foot pedal seat and install a straight hook on the bottom wall of the foot pedal seat. The length of the straight hook is less than the initial distance between the foot pedal seat and the track. After the foot pedal seat contacts the ground, the straight hook is inserted into the track to further fix the foot pedal seat and prevent the foot pedal seat from shaking when the athlete starts running, thereby further improving safety.

[0038] Because the spring force of the pair of foot pedal seats is vertically upward, and the hook is set perpendicular to the ground, after the restriction of the first spring is released, the foot pedal seat can be directly pulled off the track using the first spring, reducing the operation steps and increasing the convenience of use.

[0039] Preferably, the pendulum is located in front of the pivot, so that the pendulum rotates clockwise under the action of the vertical rod.

[0040] Positioning the swing arm in front of the pivot allows it to rotate clockwise and embed itself into the track. This direction is the same as the tilt direction of the barb, thus allowing for better embedding into the track. After locking the pivot, the swing arm rotates counterclockwise, making it easier to pull the barb out of the track while reducing damage to the track.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] 1. The front and back positions of the two pedals can be freely adjusted and fixed on the track. By sliding the pedals onto the base, the pedal seat is lifted by a spring, allowing the pedals to move to various positions on the base. The athlete's own weight triggers the fixing unit inside the pedal seat to fix the pedal seat on the track, ensuring that the athlete is always in the optimal posture at the start of the race. Furthermore, the athlete does not need to repeatedly turn around to adjust the front and back positions of the pedals, saving time on pedal adjustments and improving training efficiency.

[0043] 2. The pedal seat can automatically return to its original position. By setting a spring three between the pedal seat and the base, the compression of the spring three when the athlete adjusts the position of the pedal seat can cause the pedal seat to automatically return to its original position after the fixation is released. Furthermore, the reaction force of the spring three on the athlete allows the athlete to adjust the position of the pedal seat more precisely, preventing the pedal seat from moving a large distance backward with a slight push from the athlete.

[0044] 3. It can ensure that the foot pedal seat is fixed to the track without loosening. By precisely setting the tooth spacing of the ratchet and the sinking depth of the gripper when it is pressed on the track, it can ensure that the gripper is fixed to the track without loosening, thereby ensuring the fixation of the foot pedal seat and ensuring that the barb is fully embedded in the track, increasing the contact area between the barb and the gripper and the track, and reducing damage to the track. Attached Figure Description

[0045] Figure 1 This is an overall structural diagram of the present invention;

[0046] Figure 2 This is a diagram showing the internal structure of the foot pedal seat;

[0047] Figure 3 for Figure 2 Enlarged view of the structure at point B in the middle;

[0048] Figure 4 for Figure 3 Enlarged view of the structure at point C;

[0049] Figure 5 for Figure 2 Sectional view of AA;

[0050] Figure 6 for Figure 5 Enlarged view of the structure at point D;

[0051] Figure 7 for Figure 2 Enlarged view of the structure at point E in the middle.

[0052] In the diagram: 1. Base; 2. Pedal; 3. Foot pedal seat; 4. Bracket; 5. Locking block; 6. Slide plate; 7. Push block; 8. Guide plate one; 9. Spring three; 10. Baffle; 11. Inclined block; 12. Slot; 301. Vertical rod; 302. Rotating shaft; 303. Swing rod; 304. Guide plate two; 305. Grab plate; 306. Slide groove; 307. Push rod; 308. Fixed groove; 309. Moving groove; 310. Outer shell; 311. Pawl; 312. Ratchet; 313. Spring four; 314. Barb; 315. Straight hook; 601. Spring one; 602. Slider; 603. Circular groove; 604. Steel ball; 605. Spring two; 606. Ball bearing; 801. Slide plate groove; 3001. Fixed rod; 3002. Folding rod; 6061. Ball bearing groove. Detailed Implementation

[0053] The aspects and features of this disclosure, as well as the methods for implementing these aspects and features, will be apparent; however, this disclosure is not limited to the embodiments disclosed below and can be implemented in various forms. These embodiments are provided to assist those skilled in the art in fully understanding this disclosure, and this disclosure is limited only to the scope of the appended claims.

[0054] Please see Figures 1 to 7 This invention provides a track and field starting training device, the technical solution of which is as follows:

[0055] Two guide plates 8 are fixedly installed on the base 1. The length of the guide plates 8 is equal to that of the base 1. Spring 9 is installed between the guide plates 8 and the side wall of the base 1. The slide plate 6 is welded to the foot pedal seat 3. The slide plate 6 is Z-shaped. The vertical part of the slide plate 6 contacts the inner wall of the base 1. The foot pedal seat 3 is 3cm from the ground. The standard length of the foot pedal seat 3 is 20cm and the height is 11cm. The initial angle between the pedal 2 and the foot pedal seat 3 is 60°. If the foot pedal is approximated as a right triangle, then the length of the slide plate 6 should be 14.5cm.

[0056] A movable groove 309 is provided on the bottom of the slide plate 6. A spring 601 is installed in the movable groove 309. One end of the spring 601 is connected to the slide plate 6, and the other end is installed on the slider 602. A sliding groove 306 is provided on the base 1. The slider 602 moves in the sliding groove 306. A fixed groove 308 is provided in the slide plate 6. A spring 605 is installed in the fixed groove 308. A steel ball 604 is installed on one end of the spring 605. A circular groove 603 is provided in the slide plate 6. The diameter of the circular groove 603 is equal to that of the steel ball 604.

[0057] The elastic modulus of spring-601 should satisfy the following condition: when the athlete's entire body weight is applied to the pedal 2, the deformation of spring-601 should be equal to the initial distance between the pedal seat 3 and the track. Since the athlete's weight is evenly distributed between both feet, the elastic modulus of spring-601 should be... Where Y is the athlete's weight, and b is the initial distance between the footrest 3 and the track.

[0058] Using the median weight of 70kg for track and field athletes, and assuming an initial distance of 3.0cm between the footrest 3 and the ground, the elastic modulus of spring-601 is chosen to be 12000N / m. When the athlete adjusts their posture, approximately 2 / 3 of their weight is applied to the pedal 2, compressing spring-601 by 1.94cm, allowing the skateboard 6 to slide on the base 1. For an 80kg athlete, the pressure on the pedal 2 during posture adjustment is 26.6kg, compressing spring-601 by 2.2cm, while maintaining an 8mm distance between the footrest 3 and the ground, allowing the skateboard 6 to slide on the base 1. Thus, even an 80kg athlete can use the system. However, athletes in this case need to pay special attention to controlling their center of gravity when adjusting their posture to prevent pressing the footrest 3 onto the ground before finding the optimal position. Specific methods can be adjusted according to actual needs.

[0059] Two outer shells 310 are symmetrically bolted to the inner wall of the pedal seat 3. The two ends of the rotating shaft 302 are rotatably installed inside the outer shell 310. Both ends of the rotating shaft 302 are interference-fitted with ratchet 312. The ratchet 312 is located inside the outer shell 310. A spring 4 313 is installed inside the outer shell 310. A pawl 311 is installed at one end of the spring 4 313. A push block 7 is slidably installed on the outer wall of the pedal seat 3. The push block 7 extends into the interior of the outer shell 310. One side of the push block 7 is in contact with the pawl 311. A baffle 10 is welded on the pedal seat 3. The baffle 10 is located above the slot 12.

[0060] To ensure athletes can train normally on the track, track manufacturers typically design appropriate specifications and parameters to support a certain load-bearing capacity. Under normal circumstances, the elastic deformation depth is generally 3-5mm, i.e., the range of value for c. However, this value represents the pressure of the athlete's foot on the track. In this invention, the area of ​​the footrest 3 and the gripping plate 305 is usually only 1 / 2 of the area of ​​the athlete's foot. Therefore, when the athlete applies their full body weight to the footrest 3, the gripping plate 305 sinks into the track by about 6mm. For this reason, the tooth pitch of the ratchet 312 is set to 6mm. Thus, after the gripping plate 305 is in close contact with the track, the athlete's weight will still cause the pivot 302 to rotate an additional 6mm. Thus, after the ratchet 312 rotates to its final position, even if the pawl 311 does not immediately lock the ratchet 312, the maximum rotation radius of the ratchet 312 is only 6mm, and at this time, the gripping plate 305 is just in contact with the ground.

[0061] A vertical rod 301 is bolted to the bottom wall of pedal 2. A push rod 307 is mounted on the bottom of the vertical rod 301. Two guide plates 304 are symmetrically and equally welded to the inner wall of pedal seat 3. The distance between the two guide plates 304 is equal to the diameter of the push rod 307. The two ends of the push rod 307 are between the guide plates 304 on the inner wall of pedal seat 3. A swing rod 303 is welded to the middle of the pivot 302. The material of the swing rod 303 is 45 steel.

[0062] Before training begins, place base 1 on the track. The athlete places their hands on the starting line, adjusts their center of gravity forward, and then places both feet on pedal 2. At this point, pedal seat 3 moves downward, and the athlete pushes backward with their feet, causing pedal seat 3 to move backward. The skateboard 6 slides along guide plate 8, compressing spring 9. At this point, the athlete should concentrate their weight on their toes to reduce the stress on the vertical bar 301. After finding the optimal distance between their feet, the athlete keeps their feet still and uses their hands to assist in slowly moving their upper body backward. The athlete rotates around their toes, gradually transferring their weight to their heels. Finally, the athlete applies their entire body weight to pedal seat 3. After mounting, pedal 2 rotates downward around the hinge point with footrest 3, causing the locking block 5 on bracket 4 to move along baffle 10. When footrest 3 is in contact with the ground, the barb 314 at the bottom of footrest 3 is embedded in the track. The locking block 5 moves the lower part of inclined block 11. During this process, vertical rod 301 drives push plate to move downward, pressing down swing rod 303. Once the torsion spring on pivot 302 is compressed, gripping plate 305 gradually presses against the track. When the athlete's upper body is perpendicular to the track, vertical rod 301 applies the maximum pressure to gripping plate 305, pressing the barb 314 on gripping plate 305 completely into the track. This completes the adjustment of footrest 3. At this point, when turning around to adjust the angle between pedal 2 and footrest 3, since the pivot 302 is locked by ratchet 312 and the rocker arm 303 moves downward, there is enough space reserved for the up and down movement of push rod 307, i.e., the rotation of pedal 2. The angle adjustment of pedal 2 is the same as the existing adjustment method, which will not be described in detail here.

[0063] After training, there is no need to unlock the components. Simply return them to their initial positions and place the starting blocks in a well-ventilated indoor area.

[0064] When the grab plate 305 is vertically embedded into the track, in this embodiment, the vertical rod 301 can be directly set as a telescopic rod with a spring inside. The elastic modulus of this spring is twice that of spring 601, and a buckle is provided on the vertical rod 301. When the grab plate 305 is pressed into the track by the vertical rod 301, the spring is locked by the buckle to prevent the spring from pulling the grab plate 305 out of the track. Thus, there is no need to set up components such as the pivot 302 and the swing rod 303, simplifying the structure and saving costs. However, the barb 314 must be inserted vertically or at a small angle into the track; otherwise, the barb 314 will be difficult to embed into the track, or it will cause significant damage to the track when it is embedded. Moreover, during the frequent starting training of athletes, the vertical or small-angle embedding of the barb 314 into the track is prone to bending, causing the footrest 3 to be unstable, thereby affecting the athlete's training.

[0065] Compared to the schemes mentioned above, the movement trajectory of the grab plate 305 is as follows: it first moves counterclockwise and embeds itself into the track, and then moves backward a short distance as the swing arm 303 extends, embedding itself more tightly into the track. Furthermore, by utilizing the tilting property of the hook 314 itself, the vertical movement of the grab plate 305 can be restricted, making the footrest 3 more securely fixed.

[0066] When the starting blocks are shared, after training, press the push blocks 7 on both sides of the pedal seat 3 with both hands, causing the pawl 311 inside the outer casing 310 to disengage from the ratchet 312, releasing the lock of the pawl 311 on the ratchet 312. The pivot 302 returns to its initial position under the action of the torsion spring 1, and the grab plate 305 is lifted off the track via the swing rod 303. The two rectangular rods are then inserted into the barrel groove, pressing the steel ball 604 back into the fixing groove 308, releasing the steel ball 604 from restricting the vertical direction of the pedal seat 3. Spring 1 601 returns to its original deformation, lifting the pedal seat 3 along with the barb 314. At this time, spring 3 9 can return to its original deformation, restoring the two pedal seats 3 to a parallel state.

[0067] Alternatively, multiple starting blocks can be set up directly. The torsion springs at spring 601 and pivot 302 of different starting blocks have different elastic moduli, which can be selected by athletes according to their needs for different weight ranges, making it convenient for athletes to train.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate and facilitate those skilled in the art to understand the technical solutions of the present invention, and are not intended to limit them; modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the inventive motivation of the present invention.

Claims

1. A track and field starting training device, comprising: The base (1), foot pedal seat (3), pedal (2), bracket (4), and locking block (5) are provided. Foot pedal seat (3) is installed on both sides of the base (1). Pedal (2) is rotatably installed on the foot pedal seat (3). Bracket (4) is rotatably installed on the pedal (2). Locking block (5) is installed on the bracket (4). Locking grooves (12) are evenly provided on the foot pedal seat (3). The features are as follows: a sliding plate (6) is fixedly installed on the side wall of the foot pedal seat (3); a sliding plate groove (801) that cooperates with the sliding plate (6) is provided on the base (1); a sliding groove (306) is provided on the base (1); a slider (602) is installed in the sliding groove (306); a moving groove (309) is opened at the bottom of the sliding plate (6); and the top end of the slider (602) is inserted into the moving groove (309); a slider (602) that cooperates with the top end of the slider (602) is fixedly installed in the moving groove (309). The base (1) has two guide plates (8) symmetrically fixedly installed on it. The base (1) has a spring (9) fixedly installed on it. The spring (9) is located between the guide plate (8) and the side wall of the base (1). The spring (9) is in contact with the skateboard (6). The foot pedal seat (3) is provided with a fixing unit. The fixing unit fixes the foot pedal seat (3) on the track by the vertical gravity applied to the foot pedal seat (3) when the athlete leans backward. The fixed unit includes a rotating shaft (302) rotatably mounted on the pedal seat (3). A torsion spring is connected between the rotating shaft (302) and the pedal seat (3). A swing arm (303) is fixedly mounted in the middle of the rotating shaft (302). A gripper plate (305) is hinged to one end of the swing arm (303). A barb (314) is provided on the bottom wall of the gripper plate (305). The angle between the barb (314) and the pedal seat (3) is 60°. A vertical rod (301) is fixedly mounted on the pedal (2). A push rod (307) that cooperates with the swing arm (303) is fixedly mounted at one end of the vertical rod (301). A guide plate (304) that cooperates with the push rod (307) is fixedly mounted on the inner wall of the pedal seat (3). The swing arm (303) is located in front of the rotating shaft (302), so that... The swing arm (303) rotates clockwise under the action of the vertical rod (301). The inner wall of the moving groove (309) is provided with a fixed groove (308). A steel ball (604) is installed in the fixed groove (308) by a spring (605). A circular groove (603) for fixing the steel ball (604) is provided on the slider (602). A baffle (10) is fixedly installed on the foot pedal seat (3). The slot (12) is located below the baffle (10). When the foot pedal seat (3) is not fixed on the track, the locking block (5) slides on the baffle (10). An inclined block (11) is fixedly installed on the foot pedal seat (3). The distance between the inclined block (11) and the baffle (10) is equal to the diameter of the locking block (5). Locking components for fixing the rotating shaft (302) are provided at both ends of the rotating shaft (302).

2. The track and field starting training equipment according to claim 1, characterized in that: The locking assembly includes two housings (310) symmetrically fixedly installed on the inner wall of the pedal seat (3). Both ends of the rotating shaft (302) are fixedly installed with ratchet wheels (312). The tooth pitch of the ratchet wheel (312) is cN / n, where N is the area of ​​the athlete's foot, n is the sum of the areas of the grip plate (305) and the bottom wall of the pedal seat (3), and c is in the range of 3 to 5 mm. The ratchet wheel (312) is located inside the housing (310). A spring four (313) is installed inside the housing (310). A pawl (311) is fixedly installed at one end of the spring four (313). A push block (7) is slidably installed on the outer wall of the pedal seat (3). The push block (7) extends into the interior of the housing (310). The pawl (311) locks the ratchet wheel (312) by the push block (7).

3. The track and field starting training equipment according to claim 1, characterized in that: The vertical rod (301) includes a fixed rod (3001) fixedly installed on the pedal (2), and a folding rod (3002) is rotatably installed at the bottom of the fixed rod (3001). A torsion spring is provided between the fixed rod (3001) and the folding rod (3002).

4. The track and field starting training equipment according to claim 1, characterized in that: The foot pedal seat (3) has a straight hook (315) on its bottom wall. The straight hook (315) is perpendicular to the ground and the length of the straight hook (315) is less than the initial distance b between the foot pedal seat (3) and the track.

5. The track and field starting training equipment according to claim 1, characterized in that: The length of the skateboard (6) is x=a(hb) / h, where a is the length of the footrest (3), b is the distance between the footrest (3) and the track, and h is the height of the footrest (3).

6. The track and field starting training equipment according to claim 1, characterized in that: The contact surfaces of the slide plate (6) and the base (1) with the guide plate (8) are provided with a plurality of balls (606), and the balls (606) protrude at least 0.5 to 1 mm on the surface of the slide plate (6).

7. The track and field starting training equipment according to claim 6, characterized in that: The guide plate (8) and the base (1) have multiple ball grooves (6061) that cooperate with the ball (606). The depth of the ball groove (6061) is between 0.5R and 1R, where R is the radius of the ball (606). The distance between the ball groove (6061) and the ball (606) is equal to 2 / 3 of the initial distance between the base (1) and the track.

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