CN217246555U - Stretching device for physical training arm strength - Google Patents

Abstract

The utility model belongs to the technical field of stretching training, and discloses a stretching device for physical fitness training. The number of the support plates is two, the top of the bottom plate is fixedly installed with a vertical block located between the two support plates, the inside of the vertical block is movably sleeved with a heavy object, and the top of the heavy object is fixedly installed with a vertical block. vertical pole. When the athlete cannot exert great force, at this time, by slowly pulling the weight up, the athlete can perform the back-and-forth stretching of the muscles without exerting great force. Compared with the traditional device, the The device can apply a suitable reaction force according to the pulling force exerted on the pull handle by the sports students during real-time training, so as to improve the training effect, and at the same time, it can also prevent the muscles from being strained.

Description

A kind of stretching device for sports arm training

technical field

The utility model belongs to the technical field of stretching training, in particular to a stretching device used for the training of physical arm strength.

Background technique

Physical education is based on physical and intellectual activities. According to the laws of human growth and development, skill formation and function improvement, it can promote all-round development, improve physical fitness and overall education level, enhance physical fitness and improve sports ability, and improve lifestyle and life. A conscious, purposeful, organized activity of quality that can make the body strong through physical exercise, and can cultivate virtues such as bravery, resourcefulness, and safeguarding the collective good, and arm exercise is one of the most common sports, outdoor training venues It is equipped with various types of sports training equipment. The tension trainer is a commonly used muscle training equipment, and the stretcher is a kind of equipment suitable for mass fitness exercise. The muscles, triceps and other parts are exercised, and exercise stretching machines are generally used indoors.

At present, when sports students perform high-intensity muscle training operations, they usually need to use arm strength stretching training devices for daily muscle training. The weight of the load can be adjusted manually. However, when the athlete trains continuously for a long time, the arm muscles will be sore. At this time, the traditional training device cannot automatically assist or reduce the actual situation of the athlete training. The weight of the material makes sports students less effective in the training stage after reaching the training limit, and it is easy to cause muscle strain, which brings inconvenience to the training of sports students.

When the sports students use the auxiliary stretching training device for arm strength training, when the continuous training time is long, and the sports students' hands produce more sweat due to strenuous exercise, the sports students are easily separated from the drawbar. , causing the heavy objects inside the auxiliary stretching training device for arm strength training to fall off, resulting in a violent collision with the bottom end of the device, causing certain damage to the auxiliary stretching training device for arm strength training and reducing the life of the device. At the same time, the inertia when falling is relatively large, and after hitting the bottom end of the device, it will make a harsh impact sound, thus affecting the normal training operations of other sports students.

When the general arm training auxiliary stretching training device is used, because the price of the training equipment is relatively expensive, the equipment is used more frequently. Due to the continuous use of a large number of sports students, the internal heavy objects will be carried out hundreds of times. Thousands of round-trip motions and dynamic friction with the inside of the device. Due to the existence of friction, the contact surface between the heavy object and the device generates a higher temperature, which intensifies the wear degree of the heavy object and reduces the service life of the device. At the same time, due to the wear and tear of heavy objects, the replacement frequency of heavy objects increases, so it needs to be improved and optimized.

Utility model content

The purpose of the present utility model is to provide a stretching device for physical training of physical strength, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a stretching device for physical fitness training, comprising a base, a bottom plate is fixedly installed on the right end of the top of the base, and a support plate is fixedly installed on the top of the bottom plate, so The number of the support plates is two, the top of the bottom plate is fixedly installed with a vertical block located between the two support plates, the inside of the vertical block is movably sleeved with a heavy object, and the top of the heavy object is fixedly installed with a vertical block. a vertical rod, the top of the vertical rod penetrates the vertical block, the left end of the support plate is fixedly installed with a fixed rod, the number of the fixed rod is two, and the two support plates and the fixed rod are movably installed with Guiding mechanism, the inside of the vertical block is provided with a first circular hole, the inside of the first circular hole is provided with a first one-way valve, the inside of the heavy object is provided with an air supply mechanism, and the left end of the vertical block is provided with a first one-way valve. There is an air intake mechanism;

The first one-way valve, the second one-way valve and the third one-way valve only allow the gas to flow in one direction. The student sits on the surface of the seat, holds the handle and pulls it down. At this time, the handle will pass through the thin The rope drives the vertical rod and the heavy object to move upward, and the gas above the heavy object will be squeezed, thereby exerting a reverse thrust on the heavy object, and at the same time, the gas above the heavy object will flow out to the outside through the first circular hole , due to the upward movement of the heavy object, the space under the heavy object will be in a negative pressure state at this time, and the external air will be extracted through the third round hole to compensate for the negative pressure inside the vertical block;

By pulling the weight upward, the weight pressurizes the gas above the vertical block, thereby obtaining the reverse thrust of the gas, and exerting a reverse force on the pulling force of the athlete, so that the pulling resistance of the athlete increases, and Through the first round hole, the gas is slowly discharged outward. When the pulling force exerted by the athlete is large, the rate of gas discharge will be accelerated, and the resistance received by the athlete will also be large. At this time, by slowly pulling the heavy objects up, the sports students can also perform the back-and-forth stretching of the muscles without exerting great force. Applying a suitable reaction force to the applied pulling force can improve the training effect and prevent the muscle from being strained.

Preferably, a second casing is fixedly installed at the bottom end of the inner cavity of the vertical block, a second movement plate is movably sleeved inside the second casing, and a second movement rod is fixedly installed on the top of the second movement plate , the top of the second movement rod penetrates through the second casing and is fixedly installed with a round block, and the outer surface of the second movement rod is movably sleeved with a second casing elastically supported between the top of the second casing and the bottom end of the round block. spring;

When the athlete's hand is detached from the handle after a long period of high-intensity training, and the palm of the hand sweats and loses strength, the weight that loses tension at this time will fall down under the action of the weight's own gravity. When the weight falls down, it will squeeze the gas under the weight, so that the gas enters above the weight through the second round hole, and the weight continues to fall until it comes into contact with the round block, which will squeeze the second movement The rod makes the second movement plate move downward. At this time, the second spring is squeezed and is in a state of elastic compression. Due to the elastic recovery effect of the second spring, an upward reaction force will be exerted on the round block, so as to carry out the heavy lifting. buffer;

Due to the elastic recovery effect of the second spring, when the weight presses the second spring, a reverse force will be applied to the weight through the second spring, thereby buffering the weight. Compared with the traditional device, the device uses After the gas pressure buffers the heavy object in the first stage, when the heavy object touches the round block, it will be affected by the elastic force of the second spring, and the second stage buffer will be applied to the heavy object. The gas at the bottom end of the block is squeezed, so that the gas buffers the weight and also accelerates the rate of the gas entering the top of the vertical block.

Preferably, the air supply mechanism includes a second round hole, a second one-way valve is arranged inside the second round hole, and the second round hole is located at the contact surface between the weight and the inner wall of the vertical block;

When the heavy object uses its own weight to descend, the gas under the heavy object will be squeezed, so that the gas under the heavy object will enter above the heavy object through the second circular hole, and the gas will be in the second circular hole. When the inside of the hole flows, the heat inside the heavy object is absorbed, thereby cooling the contact surface between the heavy object and the inner wall of the vertical block;

By introducing cold air to the bottom end of the vertical block, when the heavy object descends, the cold air under the heavy object is squeezed and enters above the heavy object through the second round hole. Compared with the traditional device, the Use cold air to cool down the heavy objects, weaken the temperature of the heavy objects, and generate a large amount of heat through dynamic friction after a long period of reciprocating motion, preventing the wear rate of the heavy objects from aggravating due to the increase in the temperature of the heavy objects. The speed of the round hole is slow, which has a certain buffering effect on heavy objects.

Preferably, the guide mechanism includes a crossbar, a fixed pulley and a string, the outer surface of the crossbar is fixedly sleeved with a fixed pulley, the outer surface of the fixed pulley is provided with a string, and one end of the string is It is fixedly connected with the top of the vertical rod, the other end of the string is fixedly connected with a pull handle, and the left end of the top of the base is fixedly installed with a seat. Due to the design of the fixed pulley, it can play a good guiding role for the string. Change the pulling direction of sports students.

Preferably, the air intake mechanism includes a third round hole, and a third one-way valve is arranged inside the third round hole. Due to the design of the third one-way valve, when the weight moves upward, the vertical Negative pressure is generated under the block, and the cold air from the outside will be extracted through the third round hole. When the weight moves downward to squeeze the gas under the weight, the weight will prevent the air inside the vertical block. The gas goes out, causing the gas to move upwards.

Preferably, a fixed plate is fixedly installed on the top of the vertical block, a vertical plate is fixed on the top of the left end of the fixed plate, the bottom end of the vertical plate penetrates through the fixed plate, and the right end of the vertical plate is provided with a positioning hole, The top of the fixed plate is fixedly installed with a positioning mechanism. Due to the design of the vertical plate, the students can adjust the amount of leakage of the first round hole by adjusting the height of the vertical plate, so as to adjust the amount of external leakage of the first round hole, so as to prevent the lifting of the heavy object by the pull handle. Adjust the initial strength.

Preferably, the positioning mechanism includes a first casing, a first movement plate, a first movement rod and a first spring, the first movement plate is movably sleeved inside the first casing, and the interior of the first casing is movably sleeved with a first movement plate. A first movement rod is movably installed, the left end of the first movement rod penetrates the first movement plate and the first casing in sequence and extends to the interior of the positioning hole, the right end of the first movement rod penetrates the first casing, and the first movement rod passes through the first casing. A first spring elastically supported between the right end of the first movement plate and the left wall of the inner cavity of the first casing is movably sleeved on the outer surface of a movement rod. When the worker pulls the first movement rod to the right, the first movement will be driven. The rod and the first motion plate move to the right together. At this time, the first spring is in a state of elastic compression, and the first motion rod is released. At this time, due to the elastic recovery effect of the first spring, the first motion rod will be driven to reset.

Preferably, the positioning hole is located at the left end of the first round hole, and the diameter of the positioning hole is smaller than the diameter of the first round hole. Since the diameter of the positioning hole is smaller than that between the first round holes, vertical blocks can be prevented. The internal gas leaks out through the positioning hole.

Preferably, the number of the second springs is four, and the four second springs are evenly distributed at the four corners of the bottom end of the vertical block. Due to the design of the second spring, the four corners of the heavy object can be buffered at the same speed. , to prevent the heavy object from rolling over.

The beneficial effects of the present utility model are as follows:

1. In the present invention, the vertical block, the heavy object and the first round hole are arranged, and the heavy object is moved upward by pulling the heavy object, so that the heavy object pressurizes the gas above the vertical block, thereby obtaining the reverse thrust of the gas, which is beneficial to the physical health. The pulling force exerts a reverse force, which increases the pulling resistance of the athlete, and slowly discharges the gas through the first round hole. The resistance received by the athlete is also relatively large. When the athlete cannot exert greater force, by slowly pulling the weight up, the athlete can perform the back-and-forth stretching of the muscles without exerting greater force. Compared with the traditional device, the device can apply an appropriate reaction force according to the pulling force exerted on the handle by the sports students during real-time training, which improves the training effect and prevents muscle strain.

2. By setting the vertical block, the weight and the second spring in the present invention, due to the elastic force recovery of the second spring, when the weight squeezes the second spring, a reverse force will be exerted on the weight through the second spring. , so as to buffer the heavy object. Compared with the traditional device, the device uses the gas pressure to buffer the heavy object in the first stage. When the heavy object touches the round block, it will be affected by the elastic force of the second spring. The weight applies a two-stage buffer, and at the same time, the weight squeezes the gas at the bottom end of the vertical block during the descending process, so that the gas buffers the weight and accelerates the rate of gas entering the top of the vertical block.

3. By setting the second round hole and the heavy object in the present invention, and by introducing cold air to the bottom end of the vertical block, when the heavy object descends, the cold air under the heavy object is squeezed and passes through the second circular hole. The hole enters the top of the heavy object. Compared with the traditional device, the cold air is used to cool the heavy object to reduce the temperature of the heavy object. At the same time, due to the slow speed of the gas passing through the second circular hole, it has a certain buffering effect on the heavy objects.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the back of the utility model;

Fig. 3 is the sectional structure schematic diagram of the front of the utility model;

4 is a schematic diagram of the internal structure of the vertical block of the present invention;

Fig. 5 is the partial enlarged structural schematic diagram of the place A in Fig. 4 of the present utility model;

Fig. 6 is the structural schematic diagram of the seat of the present invention;

Fig. 7 is the partial enlarged structural schematic diagram of the place B in Fig. 6 of the present utility model;

Fig. 8 is the partial enlarged structural schematic diagram of C in Fig. 6 of the present utility model;

Fig. 9 is the structural schematic diagram of the top view of the utility model;

FIG. 10 is a schematic structural diagram of a vertical plate of the present invention.

In the figure: 1, base; 2, bottom plate; 3, support plate; 4, vertical block; 5, heavy object; 6, vertical rod; 7, fixed rod; 8, guide mechanism; 81, horizontal rod; 82, fixed pulley ; 83, string; 9, pull handle; 10, the first round hole; 11, the first one-way valve; 12, the air supply mechanism; 121, the second round hole; 122, the second one-way valve; 13, the inlet Air mechanism; 131, the third round hole; 132, the third one-way valve; 14, the fixed plate; 15, the vertical plate; 16, the positioning mechanism; 161, the first shell; 162, the first movement plate; 163, the first 164, the first spring; 17, the positioning hole; 18, the second shell; 19, the second movement plate; 20, the second movement rod; 21, the round block; 22, the second spring; 23, the seat.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in FIGS. 1 to 10 , in an embodiment of the present invention, a stretching device for physical fitness training includes a base 1, a bottom plate 2 is fixedly installed on the right end of the top of the base 1, and a support is fixedly installed on the top of the bottom plate 2 Plate 3, the number of support plates 3 is two, the top of the bottom plate 2 is fixedly installed with a vertical block 4 located between the two support plates 3, the inner part of the vertical block 4 is movably sleeved with a weight 5, and the top of the weight 5 A vertical rod 6 is fixedly installed, the top of the vertical rod 6 penetrates the vertical block 4, the left end of the support plate 3 is fixedly installed with a fixed rod 7, the number of the fixed rods 7 is two, and the space between the two support plates 3 and the fixed rod 7 is A guide mechanism 8 is movably installed, a first round hole 10 is opened inside the vertical block 4, a first one-way valve 11 is arranged inside the first round hole 10, and a gas supply mechanism 12 is opened inside the weight 5, and the vertical block The left end of 4 is provided with an air intake mechanism 13;

The first one-way valve 11, the second one-way valve 122 and the third one-way valve 132 only allow the gas to flow in one direction. The athlete sits on the surface of the seat 23 and pulls the handle 9 downward. The handle 9 will drive the vertical rod 6 and the weight 5 to move upward through the string 83. At this time, the gas above the weight 5 will be squeezed, thereby exerting a reverse thrust on the weight 5, and at the same time above the weight 5. The gas will flow out to the outside through the first round hole 10, because the weight 5 moves upward, the space under the weight 5 will be in a negative pressure state at this time, and the external air will be extracted through the third round hole 131 at this time. Air compensates the negative pressure inside the vertical block 4;

By pulling the weight 5 to move upward, the weight 5 pressurizes the gas above the vertical block 4, so as to obtain the reverse thrust of the gas, and exert a reverse force on the pulling force of the athlete, so that the pulling resistance of the athlete is increase, and slowly discharge the gas outward through the first round hole 10. When the pulling force exerted by the athlete is large, the rate of gas discharge will be accelerated, and at the same time, the resistance of the athlete will also be large. When the strength is high, by slowly pulling the weight 5 up, the sports students can also perform the back-and-forth stretching of the muscles without exerting great force. During real-time training, the pulling force applied to the handle 9 is applied with an appropriate reaction force, which improves the training effect and prevents muscle strain.

Wherein, the bottom end of the inner cavity of the vertical block 4 is fixedly installed with the second casing 18, the inner part of the second casing 18 is movably sleeved with the second movement plate 19, and the top of the second movement plate 19 is fixedly installed with the second movement rod 20, The top of the second movement rod 20 penetrates through the second housing 18 and is fixedly mounted with a round block 21 . two springs 22;

When the athlete's hand is detached from the handle 9 after a long period of high-intensity training, and the palm of the hand sweats and loses strength, the weight 5 that loses tension at this time will fall down under the action of the weight 5's own gravity. Drop, when the weight 5 falls downward, the gas under the weight 5 will be squeezed, so that the gas enters the top of the weight 5 through the second round hole 121, and the weight 5 continues to fall to the same point as the round block 21. contact, the second movement rod 20 will be squeezed, so that the second movement plate 19 will move downward. At this time, the second spring 22 will be in a state of elastic compression due to the compression. The block 21 exerts an upward reaction force, thereby buffering the weight 5;

Due to the elastic recovery effect of the second spring 22, when the weight 5 squeezes the second spring 22, a reverse force will be applied to the weight 5 through the second spring 22, thereby buffering the weight 5, which is different from the traditional device. In contrast, after the device uses the gas pressure to buffer the weight 5 in the first stage, when the weight 5 contacts the round block 21, it will be subjected to the elastic force of the second spring 22, and the second-stage buffer will be applied to the weight 5. At the same time, the weight 5 squeezes the gas at the bottom end of the vertical block 4 during the descending process, so that the gas buffers the weight 5 and also accelerates the rate at which the gas enters the top of the vertical block 4 .

Wherein, the air supply mechanism 12 includes a second circular hole 121, the second circular hole 121 is provided with a second one-way valve 122 inside, and the second circular hole 121 is located at the contact surface between the weight 5 and the inner wall of the vertical block 4;

When the weight 5 uses its own weight to descend, the gas under the weight 5 will be squeezed, so that the gas under the weight 5 will enter above the weight 5 through the second round hole 121, When the gas flows inside the second circular hole 121, it absorbs the heat inside the weight 5, thereby cooling the contact surface between the weight 5 and the inner wall of the vertical block 4;

By introducing cold air to the bottom end of the vertical block 4, when the weight 5 moves downward, the cold air under the weight 5 is squeezed, and enters above the weight 5 through the second round hole 121, which is different from the traditional Compared with other devices, use cold air to cool the weight 5, weaken the temperature of the weight 5 and generate a large amount of heat through dynamic friction after a long period of reciprocating motion, preventing the increase of the temperature of the weight 5 due to the increase in the temperature of the weight 5. At the same time, because the speed of the gas passing through the second round hole 121 is relatively slow, the weight 5 has a certain buffering effect.

The guide mechanism 8 includes a cross bar 81, a fixed pulley 82 and a string 83. The outer surface of the cross bar 81 is fixedly sleeved with a fixed pulley 82, and the outer surface of the fixed pulley 82 is provided with a string 83. One end of the string 83 It is fixedly connected with the top of the vertical rod 6, the other end of the string 83 is fixedly connected with the pull handle 9, and the left end of the top of the base 1 is fixedly installed with the seat 23. Due to the design of the fixed pulley 82, it can play a good role in the string 83. The guiding effect makes the pulling direction of sports students change.

The air intake mechanism 13 includes a third circular hole 131, and a third one-way valve 132 is arranged inside the third circular hole 131. Due to the design of the third one-way valve 132, when the weight 5 moves upward, the A negative pressure is generated under the interior of the vertical block 4, and the cold air from the outside will be extracted through the third circular hole 131. When the weight 5 moves downward to squeeze the gas under the weight 5, the weight 5 will The gas inside the vertical block 4 is prevented from going out, so that the gas moves upward.

The top of the vertical block 4 is fixedly installed with a fixed plate 14, the top of the left end of the fixed plate 14 is fixedly installed with a vertical plate 15, the bottom end of the vertical plate 15 penetrates the fixed plate 14, and the right end of the vertical plate 15 is provided with a positioning hole 17 for fixing A positioning mechanism 16 is fixedly installed on the top of the plate 14. Due to the design of the vertical plate 15, the students can adjust the amount of external leakage of the first round hole 10 by adjusting the height of the vertical plate 15, thereby pulling the handle 9 heavily. Adjust the initial strength of the object 5 rising.

The positioning mechanism 16 includes a first casing 161 , a first motion plate 162 , a first motion rod 163 and a first spring 164 , and the first motion plate 162 is movably sleeved inside the first casing 161 . A first movement rod 163 is movably installed inside, the left end of the first movement rod 163 penetrates the first movement plate 162 and the first housing 161 in turn and extends to the interior of the positioning hole 17 , and the right end of the first movement rod 163 penetrates the first housing 161 , the outer surface of the first movement rod 163 is movably sleeved with a first spring 164 elastically supported between the right end of the first movement plate 162 and the left wall of the inner cavity of the first housing 161, and the staff pulls the first movement rod 163 to the right. , will drive the first movement rod 163 and the first movement plate 162 to move to the right together. At this time, the first spring 164 is in a state of elastic compression, and the first movement rod 163 is loosened. At this time, due to the elastic recovery of the first spring 164 , will drive the first movement rod 163 to reset.

The positioning hole 17 is located at the left end of the first round hole 10, and the diameter of the positioning hole 17 is smaller than that of the first round hole 10. Since the diameter of the positioning hole 17 is smaller than that between the first round holes 10, vertical vertical The gas inside the block 4 leaks out through the positioning hole 17 .

Among them, the number of the second springs 22 is four, and the four second springs 22 are evenly distributed on the four corners of the bottom end of the vertical block 4. Due to the design of the second springs 22, the four corners of the weight 5 can be buffered at the same speed. , to prevent the weight 5 from rolling over.

Working principle and use process:

The first one-way valve 11, the second one-way valve 122 and the third one-way valve 132 only allow the gas to flow in one direction. The athlete sits on the surface of the seat 23 and pulls the handle 9 downward. The handle 9 will drive the vertical rod 6 and the weight 5 to move upward through the string 83. At this time, the gas above the weight 5 will be squeezed, thereby exerting a reverse thrust on the weight 5, and at the same time above the weight 5. The gas will flow out to the outside through the first circular hole 10. Since the weight 5 moves upward, the space under the weight 5 will be in a negative pressure state at this time, and the external air will be extracted through the third circular hole 131 at this time. Air compensates the negative pressure inside the vertical block 4;

When the athlete's hand is detached from the handle 9 after a long period of high-intensity training, and the palm of the hand sweats and loses strength, the weight 5 that loses tension at this time will fall down under the action of the weight 5's own gravity. Drop, when the weight 5 falls downward, the gas under the weight 5 will be squeezed, so that the gas enters the top of the weight 5 through the second round hole 121, and the weight 5 continues to fall to the same point as the round block 21. contact, the second movement rod 20 will be squeezed, so that the second movement plate 19 will move downward. At this time, the second spring 22 will be in a state of elastic compression due to the compression. The block 21 exerts an upward reaction force, thereby buffering the weight 5;

When the weight 5 uses its own weight to descend, the gas under the weight 5 will be squeezed, so that the gas under the weight 5 will enter above the weight 5 through the second round hole 121, When the gas flows inside the second circular hole 121 , it absorbs the heat inside the weight 5 , thereby cooling the contact surface between the weight 5 and the inner wall of the vertical block 4 .

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. The utility model provides a stretching device is used in training of arm strength is given birth to in sports, includes base (1), its characterized in that: the bottom plate (2) is fixedly mounted at the right end of the top of the base (1), the supporting plates (3) are fixedly mounted at the top of the bottom plate (2), the number of the supporting plates (3) is two, the vertical block (4) positioned between the two supporting plates (3) is fixedly mounted at the top of the bottom plate (2), the heavy object (5) is movably sleeved in the vertical block (4), the vertical rod (6) is fixedly mounted at the top of the heavy object (5), the vertical block (4) penetrates through the top of the vertical rod (6), the fixing rod (7) is fixedly mounted at the left end of the supporting plate (3), the number of the fixing rod (7) is two, the guide mechanism (8) is movably mounted between the two supporting plates (3) and the fixing rod (7), the first round hole (10) is formed in the vertical block (4), and the first check valve (11) is arranged in the first round hole (10), an air supply mechanism (12) is arranged inside the heavy object (5), and an air inlet mechanism (13) is arranged at the left end of the vertical block (4); guiding mechanism (8) have cup jointed fixed pulley (82) including horizontal pole (81), fixed pulley (82) and string (83), the external fixed surface of horizontal pole (81) has cup jointed fixed pulley (82), the surface of fixed pulley (82) is equipped with string (83), the one end of string (83) and the top fixed connection of montant (6), the other end fixedly connected with of string (83) draws (9), the left end fixed mounting at base (1) top has seat (23).

2. The stretching device for training of sports grip according to claim 1, wherein: the bottom fixed mounting of erectting piece (4) inner chamber has second shell (18), the inside activity of second shell (18) has cup jointed second motion board (19), the top fixed mounting of second motion board (19) has second motion pole (20), the top of second motion pole (20) is run through second shell (18) and fixed mounting has circle piece (21), the surface activity of second motion pole (20) cup joints second spring (22) of elastic support between second shell (18) top and circle piece (21) bottom.

3. The stretching device for physical training of arm strength as claimed in claim 1, wherein: the air supply mechanism (12) comprises a second round hole (121), a second one-way valve (122) is arranged inside the second round hole (121), and the second round hole (121) is located on a contact surface between the heavy object (5) and the inner wall of the vertical block (4).

4. The stretching device for training of sports grip according to claim 1, wherein: the air inlet mechanism (13) comprises a third round hole (131), and a third one-way valve (132) is arranged inside the third round hole (131).

5. The stretching device for training of sports grip according to claim 1, wherein: the top fixed mounting of erecting piece (4) has fixed plate (14), the top fixed mounting of fixed plate (14) left end has riser (15), fixed plate (14) are run through to the bottom of riser (15), locating hole (17) have been seted up to the right-hand member of riser (15), the top fixed mounting of fixed plate (14) has positioning mechanism (16).

6. The stretching device for training of sports grip according to claim 5, wherein: positioning mechanism (16) is including first shell (161), first moving plate (162), first moving rod (163) and first spring (164), the inside activity of first shell (161) has cup jointed first moving plate (162), the inside movable mounting of first shell (161) has first moving rod (163), the left end of first moving rod (163) runs through first moving plate (162) and first shell (161) in proper order and extends to the inside of locating hole (17), the right-hand member of first moving rod (163) runs through first shell (161), the surface activity of first moving rod (163) cup joints first spring (164) that elastic support between first moving plate (162) right-hand member and first shell (161) inner chamber left wall.

7. The stretching device for training of sports grip according to claim 5, wherein: the positioning hole (17) is located at the left end of the first round hole (10), and the diameter of the positioning hole (17) is smaller than that of the first round hole (10).

8. The stretching device for physical training of arm strength as claimed in claim 2, wherein: the number of the second springs (22) is four, and the four second springs (22) are uniformly distributed at four corners of the bottom end of the vertical block (4).

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