RU188770U1 - A trampoline with metal legs with a cone-shaped extension at the base of the thread to prevent the threaded connection from loosening when the metal construction vibrates when jumping on a trampoline. - Google Patents

Abstract

A utility model of a trampoline with metal legs of a trampoline, characterized in that the ends that are screwed into the trampoline frame have tapered threaded ends for fastening to the trampoline frame, with a tapered extension at the base of the thread for jamming the legs when fully screwed in vibration of a metal structure when jumping on a trampoline and avoiding the need for regular twisting of threaded connections. The useful model is aimed at enhancing safety when jumping on a trampoline , Improving ergonomics and ease of use. Fig.6

Description

The invention relates to sports devices for exercise and fitness, namely, devices for jumping. As well as for use in the methods of physical therapy for the purpose of complex treatment and prevention of diseases of the human musculoskeletal system, cardiovascular system, osteoporosis, lymphatic drainage, reduction programs, neuropsychiatric correction, speech therapy and other physical or psychological conditions that require gentle dosed static or dynamic load.

A useful model is the use in the construction of a trampoline of figure 1 of legs with narrowed ends with a thread for fastening to the frame of a trampoline of figure 2-6, a cone-shaped expansion at the base of the thread for jamming the legs with full screwing in order to prevent the thread connection from loosening when the metal construction vibrates jumping on a trampoline.

A known design, in which legs are used with a threaded element with a T-shaped connection of the contact surfaces when screwing the legs.

A disadvantage of the known construction is that when jumping on a trampoline, under the influence of vibration, the trampoline is loosened as a result of the loosening of threaded connections, which requires their regular tightening.

Also known is the utility model (US 20170361143 A, 12/21/2017 description of the paragraph [0038] [0105], [0108], [0117]), which is the closest analogue, with a similar technical result - jamming (sticking) the legs of the trampoline at maximum twisting, preventing arbitrary loosening of the threaded connection, twisting the leg and avoiding the need for its regular twisting.

The technical solution is presented in paragraphs [0108], [0117]. It is indicated that when the leg is screwed into the notch of the trampoline, the conical part is pushed until the leg (5) and the trampoline knot (20) do not stick to each other. In this case, strong sticking may occur, including due to the plastic seal between the interlocking parts.

The proposed utility model has a similar technical result - jamming (sticking) the legs of the trampoline with maximum twisting, preventing arbitrary loosening of the threaded connection, unscrewing the legs and avoiding the need for its regular twisting.

However, a different technical solution is applied. The pipe of figure 3, with a diameter of 25 mm, is narrowed with a special milling tool to the diameter of the corresponding mating part at the base of the trampoline frame, into which the leg of the trampoline is screwed, with preliminary threading. The transition point of the solid pipe in the tapered area has a conical shape, which, when the leg of the trampoline is fully twisted, wedges and prevents the arbitrary weakening of the thread during jumps on the trampoline.

The technical solution is more simple and inexpensive execution. Does not require complex and expensive production with casting metal parts of the trampoline and leg frame, or their complex precision turning, as in utility model US 20170361143 A. Also, details in the description of utility model US 20170361143 A have plastic seals that are not a reliable element and create conditions for rapid wear of the structure.

The utility model aims to address these shortcomings and its application provides:

1. Elimination of loosening of threaded connections;

2. Avoidance of the need to regularly twist the threaded connections.

In case of excessive jamming of the legs in the trampoline frame, which is possible with a long absence of disassembly of the trampoline, a through hole is provided in the design of the legs through which you can insert a metal rod, such as a screwdriver, to use it as a lever to facilitate wedging when unwinding the threads of the legs.

The essence of the utility model is illustrated by photographs showing:

Figure 1 - Trampoline, a general view;

Figure 2 - Leg trampoline (General view)

Figure 3 - The leg of the trampoline, narrowed end with thread;

Figure 4 - Leg trampoline, before screwing to the base of the trampoline;

Figure 5 - Leg trampoline, screwing to the base of the trampoline;

Figure 6 - Leg trampoline, full screwing to the base of the trampoline.

Claims (1)

The metal leg of the trampoline, characterized in that the end that is screwed into the trampoline frame has a tapered narrowed end for fastening to the trampoline frame, with a cone-shaped extension at the base of the thread for jamming the legs with full twisting.

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