Chest expander for physical training of children

Abstract

The utility model belongs to the technical field of chest expanders, and particularly relates to a chest expander for physical training of children, which comprises a base, lifting rods driven by a lifting mechanism are arranged at two ends of the top of the base, and tension frames driven by a direction adjusting mechanism are arranged on the sides, close to each other, of the tops of the two lifting rods. The two tension frames are each in a groove shape with the hollow interior and the open bottom, tension springs extending downwards are fixedly arranged in the two tension frames, and handles are fixedly arranged at the bottoms of the two tension springs. The directions of the two tension frames and the tension springs are adjusted through the two direction adjusting mechanisms and the two telescopic mechanisms respectively so as to adapt to different training postures, the training postures are diversified, and the training effect is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of pullers, and in particular relates to a puller for children's physical training. Background Art

[0002] At present, children have heavy academic tasks, which leads to fewer outdoor activities and poor physical fitness, which in turn leads to poor immunity. With the development of society and the progress of mankind, people have realized the importance of physical training for children. Therefore, more and more schools and parents will regularly lead children to do physical training to improve their physical fitness and immunity. There are many equipment for children's physical training on the market, including pullers.

[0003] For example, the application number CN202220270803.9 is a tensioner with a tension adjustment structure for children's fitness, which includes a frame, a cabin is provided inside the frame, a rotating rod is movably installed inside the left side of the frame, and a knob is fixedly installed on the top of the rotating sleeve, a screw is connected to the bottom end of the rotating sleeve, and a connecting block is fixedly connected to the lower end of the screw, a spring is fixedly connected to the lower end of the connecting block, and a pull rod is fixedly connected to the lower end of the spring, and the lower end of the pull rod is connected to a pull ring through a pull rope. By providing a turntable, the turntable can be rotated, and the first bevel gear and the second bevel gear can be matched to drive the rotating rod to rotate, and the two sets of connecting rods are connected by belts, and the two sets of sets of plates move vertically under the surface thread of the rotating rod, thereby changing the height of the device, thereby facilitating children of different heights to exercise and improving the practicality of the device.

[0004] However, the pull ring of the above-mentioned puller can only be pulled from top to bottom, the training posture is single, and the physical training effect is not high. Utility Model Content

[0005] The purpose of the utility model is to provide a puller for children's physical training to solve the problems raised in the above background technology.

[0006] In order to achieve the above technical purpose, the technical solution of the utility model is:

[0007] A tensioner for children's physical training, comprising a base, wherein the top of the base is provided with lifting rods driven by a lifting mechanism at both ends, and the tops of the two lifting rods are provided with tension frames driven by a direction adjustment mechanism on the sides close to each other, and the two tension frames are both hollow inside and open at the bottom. Tension springs extending downward are fixed inside the two tension frames, and handles are fixed at the bottoms of the two tension springs;

[0008] The direction adjustment mechanism includes a box body, a main rotating shaft is rotatably provided on an inner wall of the box body close to the lifting rod, the main rotating shaft is driven by a first rotating drive mechanism, a secondary rotating shaft is rotatably provided inside the main rotating shaft, and the secondary rotating shaft is driven by a second rotating drive mechanism, a U-shaped connecting frame is fixedly provided at the other end of the main rotating shaft, a first bevel gear is rotatably provided inside the connecting frame, the first bevel gear is fixed at the end of the secondary rotating shaft, the first bevel gear is meshed with a second bevel gear, a driving shaft is fixed inside the second bevel gear, and the end of the driving shaft passes through the side wall of the connecting frame and is fixedly connected to the tension frame.

[0009] As an improvement, the lifting mechanism includes a dual-axis motor fixed in the middle of the base, and the two output ends of the dual-axis motor are fixed with worms, and the two worms are meshed with worm wheels. The tops of the two worm wheels are fixed with screws, and the interiors of the two lifting rods are hollow and are respectively threadedly sleeved on the outside of the two screws.

[0010] As a further improvement, the two lifting rods are also provided with a telescopic mechanism, which includes an outer cylinder respectively fixed on the top of the two lifting rods, an inner cylinder is slidably provided inside the two outer cylinders, the two inner cylinders extend in a direction approaching each other, and a limiting structure is provided on the two outer cylinders.

[0011] As a further improvement, the limiting structure includes a limiting rod rotatably arranged on the outer wall of the outer cylinder, and the end of the limiting rod close to the inner cylinder extends toward the inner cylinder to form a limiting column, and the inner cylinder is provided with a plurality of through holes for the limiting column to extend into, and a limiting spring is fixedly provided at one end of the limiting rod away from the inner cylinder, and the other end of the limiting spring is fixed to the outer wall of the outer cylinder, and the end of the inner cylinder away from the outer cylinder is fixedly connected to the box body.

[0012] As a further improvement, the height of the tension frame is smaller than the length of the tension spring.

[0013] As a further improvement, the first rotation drive mechanism and the second rotation drive mechanism are both worm gear transmission structures.

[0014] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] The tensioner for children's physical training provided by the utility model respectively adjusts the directions of two tension frames and tension springs through two direction adjustment mechanisms and two telescopic mechanisms to adapt to different training postures. The training postures are varied and the training effect is better.

[0016] The lifting mechanism can adjust the height of the two lifting columns and the tension frame to accommodate trainees of different heights.

[0017] The lifting mechanism adopts a double-axis motor to drive two sets of worm gears, which has a simple structure and high lifting accuracy.

[0018] The direction adjustment mechanism can adjust the front-to-back rotation and left-to-right rotation of the tensioner at the same time, and has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of this embodiment;

[0020] Figure 2 Schematic diagram of the internal structure of the box in this embodiment;

[0021] Figure 3 yes Figure 1 A magnified view of part A;

[0022] Figure 4 It is an exploded view of the outer cylinder and the inner cylinder in this embodiment;

[0023] Wherein: 1-base, 2-lifting rod, 3-outer cylinder, 4-inner cylinder, 5-limiting rod, 6-limiting column, 7-limiting spring, 8-through hole, 9-direction adjustment mechanism, 10-tension frame, 11-tension spring, 12-handle, 13-main rotating shaft, 14-first rotation drive mechanism, 15-secondary rotating shaft, 16-second rotation drive mechanism, 17-connecting frame, 18-first bevel gear, 19-second bevel gear, 20-driving shaft, 21-dual-axis motor, 22-screw, 23-limiting sleeve, 24-double-sided rack, 25-gear. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the specific implementation methods and the accompanying drawings. The accompanying drawings are only for illustrative purposes and are only schematic diagrams, not actual drawings, and should not be construed as limiting the present application. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. It is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0025] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] like Figure 1-4 As shown, a tensioner for children's physical training includes a base 1. The top of the base 1 is provided with lifting rods 2 driven by a lifting mechanism at both ends. The tops of the two lifting rods 2 are fixed with telescopic mechanisms on the sides close to each other. The two telescopic mechanisms include outer cylinders 3. The two outer cylinders 3 are respectively fixed on the outer walls of the two lifting rods 2. The inner cylinders 4 are slidably provided inside the outer cylinders 3. The two inner cylinders 4 extend from one end away from the outer cylinder 3 toward the side close to each other. The two outer cylinders 3 are provided with limiting structures.

[0027] The limiting structure includes a limiting rod 5 rotatably arranged on the outer wall of the outer cylinder 3, and the end of the limiting rod 5 close to the inner cylinder 4 extends toward the inner cylinder 4 to form a limiting column 6. The inner cylinder 4 is provided with a plurality of through holes 8 for the limiting column 6 to extend into, and a limiting spring 7 is fixedly provided at the end of the limiting rod 5 away from the inner cylinder 4, and the other end of the limiting spring 7 is fixed to the outer wall of the outer cylinder 3. By pressing the end of the limiting rod 5 close to the outer cylinder 3, the limiting spring 7 is compressed, so that the limiting column 6 is disengaged from the through hole 8 on the inner cylinder 4, and the inner cylinder 4 is pulled to adjust the length of the inner cylinder 4 outside the outer cylinder 3. After loosening the limiting rod 5, under the action of the limiting spring 7, the limiting column 6 extends into the through hole 8 on the inner cylinder 4 to achieve the limit between the inner cylinder 4 and the outer cylinder 3.

[0028] A direction adjustment mechanism 9 is fixedly provided at one end of the two inner cylinders 4 away from the outer cylinder 3, and a tension frame 10 is fixedly provided on the two direction adjustment mechanisms 9. The two tension frames 10 are both hollow and groove-shaped with an open bottom. A downwardly extending tension spring 11 is fixedly provided inside the two tension frames 10, and a handle 12 is fixedly provided at the bottom of the two tension springs 11.

[0029] The trainee pulls the handles 12 with both hands, and the two tension springs 11 are stretched to achieve the purpose of physical training. The two direction adjustment mechanisms can respectively adjust the directions of the two tension frames 10 to adapt to the different training postures of the trainee, and can train different body parts of the trainee, with better training effect. Due to different training postures, different distances between the two hands are required. The telescopic mechanism can assist in adjusting the distance between the two tension frames 10 and the two handles 12 to adapt to the requirements of different training postures.

[0030] In this embodiment, the direction adjustment mechanism includes a box body, which is fixed at the end of the inner cylinder 4. A main rotating shaft 13 is rotatably provided on an inner side wall of the box body close to the lifting rod 2. The main rotating shaft 13 is driven by a first rotating drive mechanism 14. A secondary rotating shaft 15 is rotatably provided inside the main rotating shaft 13. The secondary rotating shaft 15 is coaxial with the main rotating shaft 13 and driven by a second rotating drive mechanism 16. A U-shaped connecting frame 17 is fixed at the other end of the main rotating shaft 13. A first bevel gear 18 is rotatably provided inside the connecting frame 17. The first bevel gear 18 is fixed at one end of the secondary rotating shaft 15 away from the lifting rod 2. The first bevel gear 18 is meshed with a second bevel gear 19. A driving shaft 20 is fixed inside the second bevel gear 19. The driving shaft 20 is coaxially connected to the second bevel gear 19. The driving shaft 20 is rotatably connected to the two inner side walls of the connecting frame 17. The ends of the driving shaft 20 pass through the side walls of the connecting frame 17 and are fixedly connected to the tension frame 10, wherein the driving shaft 20 is arranged in the front-to-back direction.

[0031] In this embodiment, the first rotation drive mechanism 14 and the second rotation drive mechanism 16 both use motors to drive a worm gear transmission structure to drive the main rotating shaft 13 and the secondary rotating shaft 15 to rotate. Specifically, the motor drives the worm to rotate, and then drives the worm wheel to rotate. The main rotating shaft 13 and the secondary rotating shaft 15 are respectively fixedly connected to the worm wheels of the first rotation drive mechanism 14 and the second rotation drive mechanism 16 to achieve separate rotation.

[0032] When the main rotating shaft 13 rotates, it drives the connecting frame 17 and the driving shaft 20 to rotate forward and backward, and then drives the tension frame 10 to rotate forward and backward, and adjusts the angle of the tension frame 10 and the tension spring 11. At this time, the second rotating drive mechanism 16 drives the auxiliary rotating shaft 15 and the first bevel gear 18 to rotate together with the connecting frame 17. When the tension frame 10 needs to be adjusted left and right, the main rotating shaft 13 does not rotate, and the second rotating drive mechanism 16 drives the auxiliary rotating shaft 15 and the first bevel gear 18 to rotate, and then drives the second bevel gear 19 and the driving shaft 20 to rotate, and drives the tension frame 10 to rotate left and right.

[0033] In this embodiment, the lifting mechanism includes a dual-axis motor 21 fixed in the middle of the base 1, and worms are fixedly provided at the two output ends of the dual-axis motor 21, and the two worms are meshed with worm wheels. Screws 22 are fixedly provided on the tops of the two worm wheels. The two screws 22 are coaxially connected to the two worm wheels. The interiors of the two lifting rods 2 are hollow and are respectively threadedly sleeved on the outsides of the two screws 22. The dual-axis motor 21 drives the two worms to rotate at the same time, thereby driving the two worm wheels and the two screws 22 to rotate, and the two lifting rods 2 are lifted and lowered.

[0034] Preferably, two limiting sleeves 23 are provided on the top of the base 1 , and the two lifting rods 2 are slidably disposed in the two limiting sleeves 23 .

[0035] Preferably, a double-sided rack 24 is fixedly provided at one end of the two inner cylinders 4 located inside the outer cylinder 3 , and two gears 25 are rotatably provided inside the two outer cylinders 3 , and the double-sided rack 24 is meshed with the two gears 25 .

[0036] Preferably, the height of the tension frame 10 is smaller than the length of the tension spring 11 . Because some training postures may cause the tension spring 11 to bend, it is necessary to prevent the tension frame 10 from being damaged due to the tension spring 11 being unable to bend when the stretching angles are different.

[0037] During training, the trainee holds the two handles 12 with both hands respectively, and then pulls the handles 12 in a specific posture, so that the tension spring 11 is stretched to achieve the purpose of training, for example, high chest cross, standing rope handle pressing down and other postures. According to the height of the trainee, the height of the two lifting rods 2 is adjusted by the lifting mechanism, and according to the training posture, the position and direction of the tension frame 10 and the tension spring 11 are adjusted by adjusting the direction adjustment mechanism 9 and the telescopic mechanism.

[0038] The utility model can adapt to different training postures, and the training postures are varied, and different parts of the body can be trained, so the training effect is better.

[0039] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A tensioner for children's physical training, comprising a base, characterized in that: The top of the base is provided with lifting rods driven by a lifting mechanism at both ends, and the tops of the two lifting rods are provided with tension frames driven by a direction adjustment mechanism on one side close to each other, and the two tension frames are both hollow and groove-shaped with an open bottom, and tension springs extending downward are fixedly provided inside the two tension frames, and handles are fixedly provided at the bottoms of the two tension springs; The direction adjustment mechanism includes a box body, a main rotating shaft is rotatably provided on an inner wall of the box body close to the lifting rod, the main rotating shaft is driven by a first rotating drive mechanism, a secondary rotating shaft is rotatably provided inside the main rotating shaft, and the secondary rotating shaft is driven by a second rotating drive mechanism, a U-shaped connecting frame is fixedly provided at the other end of the main rotating shaft, a first bevel gear is rotatably provided inside the connecting frame, the first bevel gear is fixed at the end of the secondary rotating shaft, the first bevel gear is meshed with a second bevel gear, a driving shaft is fixed inside the second bevel gear, and the end of the driving shaft passes through the side wall of the connecting frame and is fixedly connected to the tension frame.

2. The children's physical training puller according to claim 1, characterized in that: The lifting mechanism includes a dual-axis motor fixed in the middle of the base, and worms are fixedly provided at the two output ends of the dual-axis motor. The two worms are meshed with worm wheels, and screws are fixedly provided on the tops of the two worm wheels. The interiors of the two lifting rods are hollow and are respectively threadedly sleeved on the outsides of the two screws.

3. The tensioner for children's physical training according to claim 1, characterized in that: The two lifting rods are also provided with a telescopic mechanism, which includes an outer cylinder respectively fixed on the top of the two lifting rods, an inner cylinder is slidably provided inside the two outer cylinders, the two inner cylinders extend in a direction approaching each other, and a limiting structure is provided on the two outer cylinders.

4. The children's physical training puller according to claim 3, characterized in that: The limiting structure includes a limiting rod rotatably arranged on the outer wall of the outer cylinder, and one end of the limiting rod close to the inner cylinder extends toward the inner cylinder to form a limiting column, and the inner cylinder is provided with a plurality of through holes for the limiting column to extend into, and a limiting spring is fixedly arranged at one end of the limiting rod away from the inner cylinder, and the other end of the limiting spring is fixed to the outer wall of the outer cylinder, and one end of the inner cylinder away from the outer cylinder is fixedly connected to the box body.

5. The children's physical training puller according to any one of claims 1 to 4, characterized in that: The height of the tension frame is smaller than the length of the tension spring.

6. The tensioner for children's physical training according to claim 1, characterized in that: The first rotation drive mechanism and the second rotation drive mechanism are both worm gear transmission structures.

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