Exercise apparatus with scissor mechanism

Abstract

The invention relates to the field of physical training and the manufacture of sports equipment, and more particularly to devices for sport and the development of physical skills. An exercise apparatus with a scissor mechanism comprises a platform, a base, and a scissor mechanism disposed therebetween with resilient elements. Each resilient element is configured in the form of a spring mechanism consisting of individual sections connected to one another in succession via intermediate movable bearings. The end sections rest on fixed bearings, wherein all of the bearings are aligned by a rod, one end of which is rigidly fastened to the corresponding fixed bearing, and additional resilient elements are mounted on a portion of the links. The invention makes it possible to adjust the exercise apparatus within wide ranges of the force characteristics thereof.

Description

[0001] Scissor lift machine.

[0002] The invention relates to the field of physical education and the production of equipment for sports and the development of physical skills.

[0003] A multifunctional exercise machine described in RU Patent No. 2304452, MKP A63B 21 / 06, published August 20, 2007, offers expanded functionality due to the increased number of people using the machine simultaneously, the ability to utilize various equipment located on all sides of the frame, and the expanded range of exercises, allowing each person to consistently train different muscle groups on a single machine. A drawback of this machine is its bulkiness and structural complexity.

[0004] A multifunctional portable exercise machine, described in RU Patent No. 2493893, IPC A63B 21 / 06, published September 27, 2013, comprises a platform with vertical posts attached to it, each with mounting holes along its entire length. Two pairs of mini-bars are mounted on these posts, each with a barbell mount at the opposite end. The ends of the mini-bars are connected by two removable long bars at different heights and two removable short bars with pulleys at the same height. The machine also includes a weight platform, movable up and down by placing it on handles connected to the rods of the counterweight sets via a system of cables and pulleys. The platform beams at the corners form a crosspiece. A disadvantage of this machine is its bulkiness and structural complexity.

[0005] The compact Tomin exercise machine, described in RU patent No. 170851, IPC A63B21 / 068, published May 11, 2017, was selected as the closest prototype. It is designed as a small-sized exercise machine with the ability to assist in performing strength exercises (e.g., pull-ups on a horizontal bar, flexion and extension of arms on parallel bars), including during the period of post-traumatic rehabilitation. Its operation does not require significant space, as well as complex procedures for its assembly, disassembly and installation, which allows the use of the machine in rooms with small free areas, including at home.

[0006] This compact exercise machine consists of a platform 1, a base 2, and a scissor mechanism attached to them, consisting of levers 3, hinges 4, and rollers 5. Levers 3 can be combined into pairs by installing crossbars 6 between them. Elastic elements 7 are installed between base 2 and crossbar 6. Any of the links of the device can also be connected by elastic elements.

[0007] When a load P is applied to platform 1, it approaches base 2, causing the scissor mechanism links to deflect. Elastic elements 7 then tend to push platform 1 and base 2 apart. The action of elastic elements 7 allows for the force characteristic of the exercise machine to be determined. This characteristic, in the main section of the platform's travel h, is known as a "reverse spring characteristic." That is, as platform 1 approaches base 2, force P decreases. By connecting the links of the device with elastic elements, various force characteristics can be achieved.

[0008] However, the control systems present in the prototype do not provide the necessary capabilities for adjusting the power characteristics for different user groups.

[0009] The technical result of the claimed device consists in expanding the scope of application of the simulator by providing the ability to change the strength characteristics over a wide range.

[0010] The said technical result is achieved due to the fact that in a training device with a scissor mechanism, comprising a platform and a base with a scissor mechanism installed between them, wherein elastic elements are installed between the platform, the base, and the scissor mechanism, according to the invention, each elastic element is made in the form of a spring mechanism consisting of separate sections connected to each other in series through intermediate movable supports, and the outer sections of the spring mechanism rest on fixed supports, wherein the movable and fixed supports are located on a rod and are centered by the rod, wherein one of the fixed supports is rigidly fixed to one of the ends of the rod, and the sections consist of external and internal springs installed concentrically in each section, and additional elastic elements are installed on the base

[0011] The number of spring mechanisms can be from 1 to 5.

[0012] Additional elastic elements can be installed vertically on the base, with the impact on the elastic elements being achieved when the platform is lowered to the top of the elastic elements.

[0013] The number of additional elastic elements can be from two to ten.

[0014] By implementing the required number of primary elastic elements in the form of spring mechanisms consisting of a selected number of sets of short, concentrically mounted spring sections, separated by movable supports and positioned on a centering rod secured at one end to a machine element with the nearest fixed support resting against another machine element, as well as by using the required number of additional elastic elements designed to operate during the final stage of the platform's downward movement, the machine's power characteristics are significantly expanded to suit the user's fitness level. The machine can be successfully used by both physically fit athletes and physically weak individuals, such as those recovering from injuries or surgeries, as well as children, including young children and preschoolers.

[0015] Thus, the claimed device ensures the achievement of the following technical result: expansion of the scope of application of the simulator by providing the possibility of changing its power characteristics over a wide range.

[0016] Figure 1 shows the design of the simulator with a scissor mechanism in the upper position of the platform.

[0017] Figure 2 shows the design of the exercise machine with a scissor mechanism in the lower platform position. Figure 3 schematically depicts the exercise machine with a scissor mechanism in an intermediate position.

[0018] Figure 4 shows the spring mechanism.

[0019] Figure 5 shows the power characteristics of a simulator with a scissor mechanism with variously installed elastic elements.

[0020] The exercise machine with a scissor mechanism consists of a platform 1, a base 2, a scissor mechanism attached to them, consisting of levers 3, hinges 4, and rollers 5.

[0021] Levers 3 can be combined into pairs by installing crossbars 6 between them.

[0022] Between the base 2 and the crossbar 6, elastic elements 7 are installed.

[0023] The elastic elements 7 are made in the form of combined spring mechanisms.

[0024] Fig. 4 shows three spring mechanisms 7. The number of spring mechanisms can vary from one to five or more, depending on the desired strength characteristics. Their number can be determined empirically based on the physical capabilities of the user. The more spring mechanisms, the easier the workout will be for a less-fit user.

[0025] Each spring mechanism 7 consists of several separate sections connected to each other in series through intermediate movable supports 9. The outer sections rest on fixed supports 10.

[0026] The fixed 10 and movable 9 supports are centered by the rod I. The left fixed support 10 is rigidly fixed to the rod 11.

[0027] Each section consists of short outer 12 and inner 13 springs, working in parallel and installed concentrically in each section.

[0028] The right fixed support 10 of each spring mechanism is secured, for example, to the base 2, and the right part of the rod 11 is secured, for example, to the crossbar 6. Other options for connecting the elements of the spring mechanisms with the elements of the simulator are also possible.

[0029] Figure 4 shows five such sections. However, their number can be adjusted; the more sections, the more precisely the load can be adjusted. The number of sections may be fewer or more than shown in the specific example. It is advisable to use at least two or more sections.

[0030] The use of these spring mechanisms 7 provided a number of advantages: a) it became possible to vary the training load with great granularity, since it is possible to vary not only the number of spring mechanisms but also the number of springs in each spring mechanism, decreasing or increasing the number of internal springs in each section. b) the compact and dense placement of the springs significantly reduced the size and weight of the exercise machine. c) the use of short springs 12 and 13, their good centering via rod 11 and supports 9 and 10, eliminated the risk of spring instability.

[0031] The device is also equipped with additional elastic elements—springs 8. These additional springs 8 are secured at their lower portions to base 2. The upper portion is free in its initial position. When a load is applied to platform 1 and the scissor mechanism is compressed, platform 1 and the scissor mechanism elements approach the upper portions of springs 8, and these springs begin to compress.

[0032] This specific example demonstrates the use of six additional vertical springs 8, three on each side of base 2. However, more or fewer of these additional elastic elements may be used. It is advisable to use between two and ten springs 8.

[0033] In this case, the load characteristics change in local intervals of the movable platform's travel 1 h (see section A1 of Fig. 5), which allows the use of the simulator by people with very poor physical fitness (preschool children, people with significant limitations, both in terms of physical strength and joint mobility).

[0034] The device operates as follows. When a load P is applied to platform 1, the latter approaches base 2, causing a deflection of the scissor mechanism links. Elastic elements 7 then tend to push platform 1 and base 2 apart. The operation of elastic elements 7 yields the simulator's force characteristic A (Figure 5), which, over the main section of the platform's travel h, is the so-called "reverse-stiffness spring characteristic." That is, as platform 1 approaches base 2, force P decreases. By connecting the device links with elastic elements and installing elastic elements on individual links, various force characteristics can be achieved. For example, by installing additional elastic elements 8 on base 2, force characteristic A1 (Figure 5) can be obtained, which is the characteristic of a "direct-stiffness spring."The combination of the device's elastic elements 7 and 8, which connect platform 1 to base 2 at the end of the exercise mechanism's travel, allows for flexible force characteristics. By varying the stiffness ratio, preload, number of elastic elements, and attachment points, various force characteristics can be achieved, allowing for varying the load on specific muscle groups during exercise.

[0035] The scissor-style machine can be used as follows. The machine is positioned under the exercise equipment (horizontal bar, parallel bars). The user steps onto platform 1, which, under the user's weight, descends. The elastic elements, which provide the machine with the necessary force, attempt to return the platform to its original position, thereby reducing the strain on the muscles involved in the exercise.

[0036] A prototype of the device was manufactured and tested, confirming the validity of the stated technical solutions. The author is currently using the device successfully for strength training.

Claims

Formula 1. A training device with a scissor mechanism, comprising a platform and a base with a scissor mechanism installed between them, wherein elastic elements are installed between the platform, the base, and the scissor mechanism, characterized in that each elastic element is made in the form of a spring mechanism consisting of individual sections connected to each other in series through intermediate movable supports, and the outer sections of the spring mechanism rest on fixed supports, wherein the movable and fixed supports are located on a rod and are centered by the rod, wherein one of the fixed supports is rigidly fixed to one of the ends of the rod, and the sections consist of external and internal springs installed concentrically in each section, and additional elastic elements are installed on the base.

2. A trainer with a scissor mechanism according to paragraph 1, characterized in that the number of spring mechanisms is from 1 to 5.

3. A training device with a scissor mechanism according to paragraph 1, characterized in that additional elastic elements are installed on the base, and the impact on the elastic elements is carried out when the platform or elements of the scissor mechanism are lowered to the upper part of the elastic elements.

4. A trainer with a scissor mechanism according to paragraph 1, characterized in that the number of additional elastic elements is from 2 to 10.

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