Abdominal Crunches

Abstract

The invention discloses a crunch training device, comprising a machine base, a tripod, a cushion frame, a backrest frame, and a linkage mechanism, wherein the tripod is hinged on a connecting seat of the machine base (1), the cushion hinge seat of the cushion frame is hinged on a cushion connecting hole of the machine base, the backrest hinge seat of the backrest frame is hinged on a backrest connecting hole of the machine base, and a backrest rocker arm is fixed on the backrest hinge seat; the linkage mechanism comprises a tripod connecting rod, a swing seat, and a backrest connecting rod, the swing seat is hinged on a swing seat connecting hole of the machine base, a cushion rocker arm and a support arm are arranged on the swing seat, one end of the tripod connecting rod is hinged on the tripod connecting hole of the tripod, one end of the backrest connecting rod is hinged on the backrest rocker arm, and the other ends of the tripod connecting rod and the backrest connecting rod are hinged on the cushion rocker arm at the same time. After adopting the above structure, the device has the advantages of simple and reasonable structure, convenient operation and use, large movement range, long training time, good fitness effect, etc.

Description

Technical Field

[0001] The invention relates to the technical field of sports and fitness equipment, in particular to an abdominal curling trainer for abdominal muscle training. Background Art

[0002] With the development of society and the advancement of science and technology, people's quality of life and working conditions are getting better and better, there are more and more social events, and the way of travel is gradually replaced by modern means of transportation. People rarely participate in physical labor and fitness exercises. People's physical fitness is declining, which has directly affected people's work energy and efficiency. In order to improve physical fitness and facilitate fitness training, various sports and fitness equipment with different fitness functions have emerged. For example, the supine board is one of the training devices for abdominal muscle strength training. By repeatedly doing sit-ups on the supine board, the purpose of training abdominal muscles is achieved. It is also an indispensable fitness equipment in bodybuilding training.

[0003] However, the existing supine board has the following shortcomings during use: the abdominal muscle groups cannot be taken into account at the same time, and the training effect on the upper abdominal muscle groups is relatively large during the supine training process, while the training effect on the lower abdominal muscle groups is relatively poor, and the expected fitness effect cannot be achieved. Although there is a training method of lying on a carpet or a mat with the buttocks on the ground and both ends tilted up when training the abdominal muscles, beginners cannot be synchronized when the buttocks are tilted up, and it is difficult to carry out systematic training for a long time during training. At present, there is a lack of a training equipment for upper and lower limb synchronization. For this reason, many manufacturers and people of insight have developed and trial-produced in view of the above problems, but no more ideal products have been launched so far. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a crunch trainer with simple and reasonable structure, easy operation and use, large range of motion, long training time and good fitness effect.

[0005] The present invention creates a technical solution adopted to solve its technical problems, which includes a machine base, a tripod, a cushion frame, a backrest frame, and a linkage mechanism. The tripod is hinged on the connecting seat at the front of the machine base, the cushion frame is located above the machine base, and the cushion hinge seat at the rear side is hinged on the cushion connecting hole of the machine base, the backrest hinge seat at the front of the backrest frame is hinged on the backrest connecting hole at the rear of the machine base, and a backrest rocker arm is fixed on the backrest hinge seat; the linkage mechanism includes a tripod connecting rod, a swing seat, and a backrest connecting rod. The swing seat is hinged on the swing seat connecting hole of the machine base, and the swing seat is correspondingly provided with a cushion rocker arm and a support arm cooperating with the front of the cushion frame, one end of the tripod connecting rod is hinged on the tripod connecting hole of the tripod, one end of the backrest connecting rod is hinged on the backrest rocker arm, and the other ends of the tripod connecting rod and the backrest connecting rod are simultaneously hinged on the cushion rocker arm.

[0006] According to a further solution of the present invention, a height-adjustable rubber-cotton footrest is installed on the tripod, a seat cushion is fixed on the seat cushion frame, and a backrest is fixed on the backrest frame.

[0007] According to a further solution of the present invention, left and right armrests are correspondingly provided on both sides of the rear portion of the backrest frame.

[0008] According to a further solution created by the present invention, a roller which cooperates with the cushion frame for rolling is provided on the support arm of the swing seat, and a limiting member which cooperates with the cushion frame is provided on the machine base.

[0009] According to a further solution of the present invention, support legs are fixed on the backrest frame.

[0010] After adopting the above structure, compared with the existing technology, it has the following advantages and effects: first, the structure is simple, the operation is convenient, and the upper body, lower body and buttocks can be synchronously lifted to train the abdominal muscles. During the exercise, the trainee can always maintain balance without shaking left and right or turning sideways. The stretching range and intensity can be adjusted according to the physical fitness, and the training can be carried out step by step to achieve the best fitness training effect. Second, the height of the rubber cotton footrest can be adjusted according to the requirements of different heights to meet the requirements of different trainees. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the decomposition structure created by the present invention.

[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention when it is in an initial state.

[0013] Figure 3 This is a schematic diagram of the main structure when the present invention creates an initial state.

[0014] Figure 4 The present invention is a schematic diagram of a three-dimensional structure when in training state.

[0015] Figure 5 The main structure diagram of the present invention when creating a training state.

[0016] Among them, 1 is a machine base, 2 a connecting seat, 3 a cushion rocker arm, 4 a tripod connecting rod, 5 a tripod connecting hole, 6 a cushion frame, 7 a cushion, 8 a tripod, 9 a rubber-cotton footrest, 10 an armrest, 11 a backrest frame, 12 a backrest, 13 a backrest hinged seat, 14 a backrest rocker arm, 15 a cushion hinged seat, 16 a backrest connecting hole, 17 a cushion connecting hole, 18 a backrest connecting rod, 19 a supporting arm, 20 a swing seat, 21 a swing seat connecting hole, 22 a limiter, 23 a supporting foot, and 24 a roller. DETAILED DESCRIPTION

[0017] Figures 1 to 5As shown, it is a specific implementation scheme of the abdominal crunch trainer created by the present invention, which includes a base 1, a tripod 8, a cushion frame 6, a backrest frame 11, and a linkage mechanism. The tripod 8 is hinged to the connecting seat 2 at the front of the base 1 through a pin, the cushion frame 6 is located above the base 1, and the cushion hinge seat 15 at the rear side is hinged to the cushion connecting hole 17 of the base 1 through a pin, and the backrest hinge seat 13 at the front of the backrest frame 11 is hinged to the backrest connecting hole 16 at the rear of the base 1 through a pin, and a backrest rocker arm 14 is fixed to the backrest hinge seat 13; the linkage mechanism includes a tripod connecting rod 4, a swing seat 20, a backrest connecting rod 18, and the swing seat 20 It is hinged to the swing seat connecting hole 21 of the machine base 1 through a pin, and a cushion rocker arm 3 and a support arm 19 cooperating with the front part of the cushion frame 6 are correspondingly provided on the swing seat 20, one end of the tripod connecting rod 4 is hinged to the tripod connecting hole 5 of the tripod 8 through a pin, one end of the backrest connecting rod 18 is hinged to the backrest rocker arm 14 through a pin, and the other ends of the tripod connecting rod 4 and the backrest connecting rod 18 are hinged to the cushion rocker arm 3 at the same time through pins; a height-adjustable rubber cotton footrest 9 is installed on the tripod 8, a seat cushion 7 is fixed on the cushion frame 6, and a backrest 12 is fixed on the backrest frame 11; left and right armrests 10 are correspondingly provided on both sides of the rear part of the backrest frame 11.

[0018] In order to reduce the frictional resistance of movement, a roller 24 that rolls with the cushion frame 6 is provided on the support arm 19 of the swing seat 20. In order to keep the initial position of the cushion 7 unchanged, a limiter 22 that cooperates with the cushion frame 6 is provided on the machine base 1.

[0019] In order to keep the backrest 12 stable, support legs 23 are fixed to the backrest frame 11 .

[0020] The working process of the invention is as follows: the trainee sits on the seat cushion 7 with his buttocks, then lies flat on the backrest 12, then holds the left and right armrests 10 with both hands, lifts his feet and hooks them on the rubber cotton footrest 9, when the trainee lifts his upper body upward with force, the backrest frame 11 is driven to rotate around the machine base 1, when the backrest frame 11 rotates, the backrest connecting rod 18 is pulled through the backrest rocker arm 14, the backrest connecting rod 18 drives the swing seat 20 to rotate through the seat cushion rocker arm 3, the swing seat 20 lifts the seat cushion 7 upward through the roller 24 on the support arm 19, and pulls the tripod 8 and the rubber cotton footrest 9 upward through the tripod connecting rod 4 connected to the seat cushion rocker arm 3, thereby achieving the purpose of synchronously lifting the upper body, lower body and buttocks to train the abdominal muscles, and the trainee can carry out step-by-step training according to his physical fitness during the training process to achieve the best fitness training effect.

[0021] The above is only an embodiment of the present invention and does not limit the present invention in any form. Simple modifications, equivalent changes or modifications made without departing from the technical solution of the present invention shall fall within the protection scope of the present invention.

Claims

1. An abdominal crunch training device, comprising a base (1), a foot frame (8), a cushion frame (6), a backrest frame (11), and a linkage mechanism, wherein: The foot frame (8) is hinged on the connecting seat (2) at the front of the machine base (1); the cushion frame (6) is located above the machine base (1); the cushion hinge seat (15) at the rear side thereof is hinged on the cushion connecting hole (17) of the machine base (1); the backrest hinge seat (13) at the front of the backrest frame (11) is hinged on the backrest connecting hole (16) at the rear of the machine base (1); a backrest rocker arm (14) is fixed on the backrest hinge seat (13); the linkage mechanism comprises a foot frame connecting rod (4), a swing seat (20), A backrest connecting rod (18) and a swing seat (20) are hinged on a swing seat connecting hole (21) of a machine base (1); a seat cushion rocker arm (3) and a support arm (19) matched with the front part of a seat cushion frame (6) are correspondingly arranged on the swing seat (20); one end of a tripod connecting rod (4) is hinged on a tripod connecting hole (5) of a tripod (8); one end of a backrest connecting rod (18) is hinged on a backrest rocker arm (14); and the other ends of the tripod connecting rod (4) and the backrest connecting rod (18) are simultaneously hinged on the seat cushion rocker arm (3).

2. The abdominal crunch training device according to claim 1, characterized in that: The footrest (8) is provided with a height-adjustable rubber-cotton footrest (9), the cushion frame (6) is provided with a seat cushion (7), and the backrest frame (11) is provided with a backrest (12).

3. The abdominal crunch training device according to claim 1 or 2, characterized in that: Left and right armrests (10) are correspondingly provided on both sides of the rear portion of the backrest frame (11).

4. The abdominal crunch training device according to claim 3, characterized in that: The support arm (19) of the swing seat (20) is provided with a roller (24) that rolls with the cushion frame (6), and the machine base (1) is provided with a limiting member (22) that cooperates with the cushion frame (6).

5. The abdominal crunch training device according to claim 4, characterized in that: A supporting foot (23) is fixed on the backrest frame (11).

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