WO2021102966A1

WO2021102966A1 - Adolescent sports device and automatic counting method thereof

Info

Publication number: WO2021102966A1
Application number: PCT/CN2019/122119
Authority: WO
Inventors: 李华京; 陆韬; 刘军; 陈禹伸
Original assignee: 垒途智能教科技术研究院江苏有限公司; 英智医疗科技南京有限公司
Priority date: 2019-11-27
Filing date: 2019-11-29
Publication date: 2021-06-03
Also published as: CN111013115B; CN111013115A; KR20210094459A; KR102486289B1

Abstract

The present invention provides an adolescent sports device, comprising: a base; and a vertical rod disposed on one end of the base, a foot pressing transverse rod being provided on the vertical rod; a counting mechanism for automatically counting sit-ups being provided in the base, the counting mechanism comprising a reel main shaft, a reel, a power spring coil spring, a pull rope, a fixed pulley, a head cover, a rotary encoder, a controller, and a display, wherein the reel main shaft is fixed in the base, the reel is fixedly connected to the outer end of the power spring coil spring to obtain automatic contraction power, and the inner end of the power spring coil spring is fixedly connected to the reel main shaft; the fixed pulley is fixedly disposed in the base and located on one side of the reel; one end of the pull rope is connected to the reel, and the other end of the pull rope passes by the fixed pulley and then extends to the outside of the base to connect to the head cover; the rotary encoder is used for obtaining information about the number of rotations of the fixed pulley.

Description

A youth exercise device and its automatic counting method

Technical field

The invention relates to the field of sports goods, in particular to a juvenile exercise device and an automatic counting method thereof.

Background technique

Sit-ups are a routine item in sports testing, which mainly test the endurance of the subject’s waist and abdomen. Now the school tests the sit-ups, usually using a mat, the subject lies on the mat, and a classmate presses the subject Then start the timing. The subject does sit-ups, and the student who presses the foot is responsible for counting. The test method is completely manual, and the counting efficiency is low and there are errors.

The current sit-up test instrument uses a human body posture sensor for identification. This sensor has low test efficiency and is susceptible to interference from external actions, resulting in low test accuracy.

Summary of the invention

In view of the above technical problems, the present invention proposes a youth exercise device and an automatic counting method thereof. The device has a simple structure, the counting process is not affected by external actions, and the counting is accurate.

In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

A juvenile exercise device for sit-ups, including:

The base, the base is arranged horizontally;

A vertical rod is arranged at one end of the base, and a presser foot crossbar is provided on the vertical rod;

The base is equipped with a counting mechanism for automatically counting the number of sit-ups. The counting mechanism includes: the main shaft of the reel, the reel, the power spring coil, the draw rope, the fixed pulley, the rotating shaft, the pawl, and the rotating shaft. The drum, the headgear, the rotary encoder, the controller and the display, wherein the main shaft of the drum is fixed in the base, and the drum is fixedly connected with the outer end of the power spring coil spring to obtain the power of automatic contraction, so The inner end of the power spring coil spring is fixedly connected with the main shaft of the reel;

The fixed pulley is fixedly arranged on one side of the reel in the base;

One end of the pull rope is connected to the reel, and the other end of the pull rope goes around the fixed pulley and extends to the outside of the base to connect with the headgear; the end of the fixed pulley is fixedly connected to the rotating shaft, and the shaft of the rotating shaft is connected to the One end of the pawl is hinged, and the other end of the pawl is arranged obliquely upward, a spring is connected between the pawl and the rotating shaft; the rotating drum is coaxially sleeved outside the rotating shaft, and the inner wall of the rotating drum is provided with the pawl Matching teeth;

The rotary encoder is arranged at the shaft end of the rotating drum, and is used to obtain information about the number of rotations of the rotating drum;

The signal input terminal of the controller is connected with the rotary encoder signal, and the signal output terminal of the controller is connected with the display;

The display is arranged on the surface of the base;

The base is provided with a buffer mechanism for reducing the force of the base on the trainer’s buttocks, including:

A tank body is arranged in the base, the upper and lower openings of the tank body are arranged, and energy-consuming materials are arranged in the tank body;

The upper backing plate is arranged at the opening at the upper end of the tank body for limiting the displacement of the upper part of the energy-consuming material, and the upper surface of the upper backing plate is flush with the upper surface of the base;

The bottom plate is arranged at the opening at the lower end of the tank body and is used to limit the displacement of the lower part of the energy-consuming material;

A bolt is vertically arranged in the tank body, and the threaded end of the bolt passes through the bottom plate and is threadedly connected with the bottom of the upper backing plate for adjusting the distance between the bottom plate and the bottom of the tank body;

The side of the base is provided with a window that can be opened or closed at a position corresponding to the tank body. Normally, the window is closed.

The energy dissipating material includes: at least one damping unit, each damping unit includes: two flexible damping plates and a rigid plate, the rigid plate is placed between the two flexible damping plates; the flexible damping plate is of different thickness Silicone rubber sheet or viscoelastic material layer less than 2mm.

The fixed pulley is a V-shaped wheel, and the surface of the V-shaped groove of the V-shaped wheel is coated with a rubber layer for increasing friction.

The base is provided with a rope hole for the pull rope to pass through.

The circumference of the rope hole is symmetrically provided with 4 rollers.

The surface of the upper backing board is provided with a flexible backing layer.

The bottom end of the base is provided with a roller for convenient movement of the entire device, and the other end of the base is provided with a supporting foot for supporting and fixing with the ground.

The present invention further discloses an exercise method based on the youth exercise device, the headgear is worn on the head of the sit-up exerciser and fixed with the head;

When the sit-up athlete changes from lying down to sitting and lying down, that is, after completing a sit-up action, the pull rope is stretched, which in turn drives the fixed pulley to rotate N times counterclockwise, and the fixed pulley passes through the The rotating shaft and the pawl drive the rotating drum to rotate counterclockwise, and the rotary encoder detects the counterclockwise rotation of the rotating drum and transmits it to the controller;

When the sit-up exerciser returns from sitting and lying down to lying down, the stretching automatically contracts under the pull of the power spring coil spring, and then drives the fixed pulley to rotate clockwise for N times. At this time, the fixed pulley passes The rotating shaft rotates clockwise. At this time, the pawl slips on the locking teeth, which causes the rotating drum to not move and the rotary encoder does not count;

The controller receives the counterclockwise rotation of the fixed pulley and compares it with a preset threshold, where the threshold is a range of the counterclockwise rotation of the fixed pulley to complete a standard sit-up;

When the number of counterclockwise rotations of the fixed pulley received is within the preset threshold range, then a sit-up action is completed by statistics, otherwise it is not counted;

By analogy, until the sit-up exerciser finishes the exercise, the controller displays the counted number on the display; the count is cleared before the next sit-up exerciser starts the sit-up exercise;

When the weight of the sit-up exerciser is high, open the window and tighten the bolts in the buffer mechanism to reduce the separation distance between the bottom plate and the bottom of the tank and improve the stiffness of the buffer mechanism;

When the sit-up exerciser is lighter, open the window, loosen the bolts in the buffer mechanism, increase the distance between the bottom plate and the bottom of the tank, and reduce the stiffness of the buffer mechanism.

Beneficial effects:

Compared with the existing sit-ups, the juvenile exercise device of the present invention has the following advantages:

First. The present invention converts the sit-up action into the number of turns of the fixed pulley counterclockwise, and then detects it through the rotary encoder, and sends the detection result to the controller, and the controller displays the result through the display, which can be realized The automatic counting of sit-ups can get rid of the original test method that is completely manual. The counting is accurate and efficient.

Second. The present invention discloses a buffer mechanism, which is used to reduce the force of the base on the trainer’s hips. When the weight of the sit-ups is high, tighten the bolts in the buffer mechanism to reduce the difference between the bottom plate and the bottom of the tank. When the sit-ups are lighter, loosen the bolts in the buffer mechanism to increase the separation distance between the bottom plate and the bottom of the tank and reduce the stiffness of the buffer mechanism.

Third. In order to prevent slippage between the pull rope and the fixed pulley, resulting in inaccurate detection data, the fixed pulley adopts a V-shaped wheel, and the surface of the V-shaped groove of the V-shaped wheel is coated with a rubber layer for increasing friction .

Description of the drawings

Figure 1 is a schematic diagram of the structure of a juvenile exercise device of the present invention;

Among them, 1. Base; 2. Vertical bar; 3. Presser foot cross bar; 4. Reel spindle; 5. Reel; 6. Pull rope; 7. Fixed pulley; 8. Headgear; 9. Rotary encoder; 10. , Controller; 13. Buffer mechanism; 14. Roller; 15. Support foot;

Figure 2 is a top view of a juvenile exercise device of the present invention;

Among them, 11. Display; 12. Rope hole;

Figure 3 is a schematic diagram of the structure of the buffer mechanism of the present invention;

Among them, 13-1, tank body; 13-2, energy-consuming materials; 13-3, upper backing plate; 13-4, bottom plate; 13-5, bolts; 13-6, rigid plate;

4 is a schematic diagram of the connection structure between the fixed pulley and the rotating drum of the present invention;

Among them, 16, rotating shaft; 18, rotating drum;

Figure 5 is a schematic diagram of the connection structure between the rotating shaft and the rotating drum of the present invention;

Among them, 17, pawl; 19, spring;

Figure 6 is a top view of the rope hole;

Among them, 20, roller.

Detailed ways

The technical scheme of a juvenile exercise device of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments of the specification.

As shown in Figure 1, a youth exercise device includes:

The base 1, the base 1 is arranged horizontally;

The vertical bar 2 is arranged at one end of the base 1, and the vertical bar 2 is provided with a presser foot cross bar 3;

The base 1 is provided with a counting mechanism for automatically counting the number of sit-ups. The counting mechanism includes: drum spindle 4, drum 5, power spring coil spring, draw rope 6, fixed pulley 7, headgear 8. The rotary encoder 9, the controller 10, and the display 11, wherein the reel spindle 4 is fixed in the base 1, and the reel 5 is fixedly connected to the outer end of the power spring coil spring to obtain automatic contraction The inner end of the power spring coil spring is fixedly connected with the main shaft 4 of the reel;

The fixed pulley 7 is fixedly arranged on the side of the reel 5 in the base 1;

One end of the draw rope 6 is connected to the drum 5, and the other end of the draw rope goes around the fixed pulley 7 and extends to the outside of the base to connect to the headgear 8;

The rotary encoder 9 is arranged at the shaft end of the fixed pulley 7 and is used to obtain information about the number of rotations of the fixed pulley 7;

The signal input terminal of the controller 10 is signally connected to the rotary encoder 9, and the signal output terminal of the controller 10 is connected to the display 11;

The display 11 is arranged on the surface of the base;

The base 1 is provided with a buffer mechanism 13 for reducing the force of the base on the trainer's buttocks, including:

A trough body 13-1 is arranged in the base 1, the trough body 13-1 is provided with upper and lower openings, the trough body 13-1 is provided with energy-consuming materials 13-2; the upper backing plate 13-3 is arranged in the The opening at the upper end of the trough body 13-1 is used to limit the displacement of the upper part of the energy dissipating material 13-2, and the upper surface of the upper backing plate 13-3 is flush with the upper surface of the base 1;

The bottom plate 13-4 is arranged at the lower end opening of the trough body 13-1, and is used to limit the displacement of the lower part of the energy consuming material 13-2;

The bolt 13-5 is vertically arranged in the groove body 13-1, and the threaded end of the bolt 13-5 passes through the bottom plate and is threadedly connected to the bottom of the upper backing plate for adjusting the bottom plate and the groove body. The separation distance between the bottoms;

As a further preference of the technical solution of the present invention, the energy dissipating material 13-2 includes: at least one damping unit, each damping unit includes: two flexible damping plates and a rigid plate, the rigid plate is placed on the two flexible damping Between the boards.

As a further preference of the technical solution of the present invention, the flexible damping plate is a silicone rubber plate or a viscoelastic material layer with a thickness of not less than 2 mm.

As a further preference of the technical solution of the present invention, the fixed pulley is a V-shaped wheel.

As a further preference of the technical solution of the present invention, the surface of the V-shaped groove of the V-shaped wheel is coated with a rubber layer for increasing friction.

As a further preference of the technical solution of the present invention, the base is provided with a rope hole for the draw rope to pass through.

As a further preference of the technical solution of the present invention, the surface of the upper backing plate is provided with a flexible backing layer.

As a further preference of the technical solution of the present invention, one end of the bottom of the base is provided with a roller that facilitates the movement of the entire device, and the other end of the base is provided with a support foot for supporting and fixing with the ground.

The present invention further discloses an automatic counting method based on the juvenile exercise device, the headgear is worn on the head of the sit-up athlete and fixed with the head;

When the sit-up athlete changes from lying down to sitting and lying, that is, after completing a sit-up action, the pull rope is stretched, which in turn drives the fixed pulley to rotate N times counterclockwise, and the rotary encoder detects The number of turns of the fixed pulley counterclockwise is transmitted to the controller;

When the sit-up exerciser returns from sitting and lying to lying down, the stretching is automatically contracted under the pull of the power spring coil spring, which in turn drives the fixed pulley to rotate clockwise for N times, and the rotary encoder aligns with the fixed pulley Turn clockwise without counting;

It should be understood that the application of the present invention is not limited to the above examples, and those of ordinary skill in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

A juvenile exercise device for sit-ups, including:

The base, the base is arranged horizontally;

A vertical rod is arranged at one end of the base, and a presser foot crossbar is provided on the vertical rod;

It is characterized in that: a counting mechanism is arranged in the base to automatically count the number of sit-ups, and the counting mechanism includes: a drum spindle, a drum, a power spring coil, a drawstring, a fixed pulley, a rotating shaft, The pawl, the rotating drum, the headgear, the rotary encoder, the controller and the display, wherein the main shaft of the drum is fixed in the base, and the drum is fixedly connected to the outer end of the power spring coil spring to obtain automatic contraction The inner end of the power spring coil spring is fixedly connected with the main shaft of the reel;

The fixed pulley is fixedly arranged on one side of the reel in the base;

One end of the pull rope is connected to the reel, and the other end of the pull rope goes around the fixed pulley and extends to the outside of the base to connect with the headgear; the end of the fixed pulley is fixedly connected to the rotating shaft, and the shaft of the rotating shaft is connected to the One end of the pawl is hinged, and the other end of the pawl is arranged obliquely upward, a spring is connected between the pawl and the rotating shaft; the rotating drum is coaxially sleeved outside the rotating shaft, and the inner wall of the rotating drum is provided with the pawl Matching teeth;

The rotary encoder is arranged at the shaft end of the rotating drum, and is used to obtain information about the number of rotations of the rotating drum;

The signal input terminal of the controller is connected with the rotary encoder signal, and the signal output terminal of the controller is connected with the display;

The display is arranged on the surface of the base;

The base is provided with a buffer mechanism for reducing the force of the base on the trainer’s buttocks, including:

A tank body is arranged in the base, the upper and lower openings of the tank body are arranged, and energy-consuming materials are arranged in the tank body;

The upper backing plate is arranged at the opening at the upper end of the tank body for limiting the displacement of the upper part of the energy-consuming material, and the upper surface of the upper backing plate is flush with the upper surface of the base;

The bottom plate is arranged at the opening at the lower end of the tank body and is used to limit the displacement of the lower part of the energy-consuming material;

A bolt is vertically arranged in the tank body, and the threaded end of the bolt passes through the bottom plate and is threadedly connected with the bottom of the upper backing plate for adjusting the distance between the bottom plate and the bottom of the tank body;

The side of the base is provided with a window that can be opened or closed at a position corresponding to the tank body. Normally, the window is closed.
The youth exercise device according to claim 1, wherein the energy-consuming material comprises: at least one damping unit, each damping unit comprises: two flexible damping plates and a rigid plate, the rigid plates are placed on the two Between two flexible damping plates; the flexible damping plate is a silicone rubber plate or a layer of viscoelastic material with a thickness of not less than 2 mm.
The youth exercise device according to claim 1, wherein the fixed pulley is a V-shaped wheel, and the surface of the V-shaped groove of the V-shaped wheel is coated with a rubber layer for increasing friction.
The youth exercise device according to claim 1, wherein the base is provided with a rope hole for the pull rope to pass through.
The youth exercise device according to claim 1, wherein the circumference of the rope hole is symmetrically provided with 4 rollers.
The youth exercise device according to claim 1, wherein the surface of the upper pad is provided with a flexible pad.
The youth exercise device according to claim 1, characterized in that the bottom end of the base is provided with a roller to facilitate the movement of the entire device, and the other end of the base is provided with a supporting foot for supporting and fixing with the ground.
An exercise method based on the juvenile exercise device according to any one of claims 1-7, wherein the headgear is worn on and fixed to the head of the sit-up exerciser;

When the sit-up athlete changes from lying down to sitting and lying down, that is, after completing a sit-up action, the pull rope is stretched, which in turn drives the fixed pulley to rotate N times counterclockwise, and the fixed pulley passes through the The rotating shaft and the pawl drive the rotating drum to rotate counterclockwise, and the rotary encoder detects the counterclockwise rotation of the rotating drum and transmits it to the controller;

When the sit-up exerciser returns from sitting and lying down to lying down, the stretching automatically contracts under the pull of the power spring coil spring, and then drives the fixed pulley to rotate clockwise for N times. At this time, the fixed pulley passes The rotating shaft rotates clockwise. At this time, the pawl slips on the locking teeth, which causes the rotating drum to not move and the rotary encoder does not count;

The controller receives the counterclockwise rotation of the fixed pulley and compares it with a preset threshold, where the threshold is a range of the counterclockwise rotation of the fixed pulley to complete a standard sit-up;

When the number of counterclockwise rotations of the fixed pulley received is within the preset threshold range, then a sit-up action is completed by statistics, otherwise it is not counted;

By analogy, until the sit-up exerciser finishes the exercise, the controller displays the counted number on the display; the count is cleared before the next sit-up exerciser starts the sit-up exercise;

When the weight of the sit-up exerciser is high, open the window and tighten the bolts in the buffer mechanism to reduce the separation distance between the bottom plate and the bottom of the tank and improve the rigidity of the buffer mechanism;

When the sit-up exerciser is lighter, open the window, loosen the bolts in the buffer mechanism, increase the distance between the bottom plate and the bottom of the tank, and reduce the stiffness of the buffer mechanism.