Top-mounted backstroke starter and method of using the same

Abstract

The invention discloses an overhead type backstroke starter and a method of using the same, which are used for swimming backstroke competitions and training. The positioning ring and the right handle bolt assembly is characterized in that one end of the steel pipe is provided with a right pulley, and the side corresponding to the right pulley is provided with a zero-adjusting gear shifter on the steel pipe with a preset size; the right handle The bolt assembly includes a main support plate, the cylindrical end of the zero-adjustment shifter is arranged in the inner hole of the main support plate of the right handle bolt assembly, the other side of the main support plate is provided with a positioning ring, and the other side of the positioning ring is provided with a guard. The cover is located in the middle of the steel pipe, the principle and structure are relatively simple, and the starting pedal adopts a trapezoidal large-spacing ruled pattern; the top-mounted backstroke starter of the present invention has the advantages of convenient zero position adjustment, intuitive gear adjustment, firm installation, good manufacturability, and anti-skid. It has the characteristics of good performance, safe and convenient storage and transportation.

Description

technical field [0001] The invention relates to the technical field of special equipment used when starting backstroke, in particular to an overhead type backstroke starter and a method of using the same. Background technique [0002] The backstroke starter is used for backstroke competition and training in swimming. It is a special equipment used by backstroke athletes when they start backstroke. The overhead backstroke starter is a device that is installed on the top of the swimming starting block or on the top of the starting judge. According to the regulations of FINA and Chinese Swimming Association "Swimming Competition Rules 2014-2018", the upper end of the backstroke starter pedal is flush with the water surface of the swimming pool, which is the zero position of the backstroke starter; the pedal of the backstroke starter can be adjusted to the water surface. 4CM up to 4CM below the water surface. The backstroke starter is installed on the upper part of the startin...

AI Technical Summary

Problems solved by technology

The backstroke starting device is installed on the upper part of the starting platform, so there are two problems: 1) The height of the water surface of each swimming pool from the ground will be different; 2) The height of the starting platform used by each swimming pool is also different. years, implementation standards, manufacturers and other factors); due to the above reasons, when installing backstroke starters in each venue, the zero position must be adjusted first

[0005] 1) It is inconvenient to adjust the zero position: The zero position of the backstroke starter refers to the relative relationship between the upper end surface of the backstroke starter pedal and the water surface of the swimming pool; Fix the left and right pulleys on the two ends of the rotating shaft steel pipe respectively. When adjusting the zero position, loosen the set screws on the left and right pulleys respectively, and adjust the left and right pulleys separately, which is very inconvenient; The left and right pulleys are adjusted separately, and it is easy to cause the length of the left and right load-bearing belts to be inconsistent, causing the starting pedal to tilt; and because the pulley is made of polymer material, frequent adjustment of the set screw will cause the screw hole of the polymer material to be worn, and the pulley is fixed. risk, which brings certain hidden dangers to backstroke events

[0006] 2) The gear adjustment is not intuitive: the gear adjustment display of the existing backstroke starter is: 4, 2, 0, -2, -4

There are no gear numbers 3, 1, -1, and -3 in the adjustment, which is not very intuitive in actual use, and requires the operator to make logical inferences, and sometimes it is easy to make operational mistakes;

[0007] 3) The installation is not firm and the workmanship is poor: the existing backstroke starting device is installed on the starting platform or the starting judge, and two parallel long holes with a length of 58mmXW8mmXD22mm need to be processed on the installation plane , poor workmanship, which is not conducive to the cooperation and transformation of the starting platform of the existing swimming venues, poor site adaptability, poor processing technology, very inconvenient construction, and it is not easy to ensure dimensional accuracy; there are two strip-shaped protrusions on the lower part of the backstroke starting platform , distributed on the left and right sides, inserted into the two long holes processed on the installation plane during installation, and played the role of fixing the backstroke starting device, but the backstroke starting device was loose after installation; The impact force is very large, and there is a certain degree of looseness during use;

[0008] 4) The anti-slip performance of the starting pedal is not good: the starting pedal of the existing backstroke starting device adopts a cylindrical convex dot matrix as an anti-skid measure. Because the height of the cylindrical convex is only 1mm, and the distance between the cylindrical convex is relatively large, when athletes When the sole of the sole of the foot steps on the pedal, the degree of embedding to the deformation of the sole of the sole of the foot is low, and the anti-slip effect is poor, so the anti-slip performance in water is not good;

[0009] 5) Unsafe and inconvenient storage and transportation: After the carrying belt of the existing backstroke starting device is all wound on the pulley, that is, after the starting pedal is put away, the starting pedal is not fixed, so that the starting pedal is in a natural drooping state

Whenever the backstroke starting device is picked up, the starting pedal is dangling, which is not safe and inconvenient to pack; the existing backstroke starting device is packaged in a soft packaging bag made of fiber cloth during transportation. Place a backstroke starting device, which is inconvenient to prevent mutual collision and storage and transportation

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