CN111672052B - Sports arm strength training ware - Google Patents

Sports arm strength training ware Download PDF

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Publication number
CN111672052B
CN111672052B CN202010554032.1A CN202010554032A CN111672052B CN 111672052 B CN111672052 B CN 111672052B CN 202010554032 A CN202010554032 A CN 202010554032A CN 111672052 B CN111672052 B CN 111672052B
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China
Prior art keywords
fixed
back plate
arm
arm strength
training
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CN202010554032.1A
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Chinese (zh)
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CN111672052A (en
Inventor
法惠玉
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Shandong Jiaotong University
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Shandong Jiaotong University
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Priority to CN202010554032.1A priority Critical patent/CN111672052B/en
Publication of CN111672052A publication Critical patent/CN111672052A/en
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    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/02Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using resilient force-resisters
    • A63B21/055Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using resilient force-resisters extension element type
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B23/00Exercising apparatus specially adapted for particular parts of the body
    • A63B23/035Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously
    • A63B23/12Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously for upper limbs or related muscles, e.g. chest, upper back or shoulder muscles

Abstract

The invention provides a physical arm strength trainer, which belongs to the technical field of sports equipment and comprises a back plate, wherein shoulder belts are fixed on the left and right parts of the rear end of the back plate, a waist belt is fixed on the lower part of the rear end of the back plate, an adjustable arm-pulling mechanism is arranged at the front end of the back plate, a transverse arm-pulling mechanism is arranged between the two shoulder belts, guide mechanisms are arranged on the left and right ends of the back plate, the whole device can train arm strength through two first handles in the adjustable arm-pulling mechanism, and meanwhile, the transverse arm-pulling mechanism positioned in front of the chest of a trainer can enable the force points of the arms of the trainer to be different to train different types of muscles of the arms of the trainer to improve the training effect of the device for training the arm strength.

Description

Sports arm strength training ware
Technical Field
The invention belongs to the technical field of sports equipment, and particularly relates to a physical arm strength trainer.
Background
The sports equipment is interdependent and mutually promoted with sports, and the popularization of sports and the diversification of sports items lead the variety, specification and the like of the sports equipment to be developed.
Arm strength training device is one of the sport equipment commonly used in the life, the intensity of current arm strength training device is fixed mostly, can't adjust, the user need purchase the arm strength training device of different intensity, bring economic burden for the user, some comparatively simple spring arm strength ware security performance is not very high simultaneously, a lot of users accidentally injure oneself in the use easily, the bounce of spring is more than the twice of user's extrusion pressure degree, in case the emergence accident situation, it is very big to the injury of user, safety can't be ensured.
Disclosure of Invention
The invention aims to provide a sports arm strength trainer, and aims to solve the problems that in the prior art, the strength of the arm strength trainer is mostly fixed and cannot be adjusted, users need to purchase arm strength trainers with different strengths, economic burden is brought to the users, meanwhile, the safety performance of some simpler spring arm strength devices is not very high, many users easily accidentally injure themselves in the using process, the rebound force of a spring is more than twice of the squeezing force degree of the users, the injury to the users is very large once an accident occurs, the safety cannot be guaranteed, and the like.
In order to achieve the purpose, the invention provides the following technical scheme:
a sports arm strength trainer comprises a back plate, wherein shoulder belts are fixed to the left and right sides of the rear end of the back plate, a waist belt is fixed to the lower portion of the rear end of the back plate, an adjustable arm-pulling mechanism is arranged at the front end of the back plate, a transverse arm-pulling mechanism is arranged between the two shoulder belts, and guide mechanisms are arranged at the left and right ends of the back plate;
the adjustable arm-pulling mechanism comprises a protruding block, a rotating groove and a connecting shaft, wherein the protruding block is fixed at the front end of the back plate, the rotating groove is formed in the right end of the protruding block, the connecting shaft is rotatably connected to the upper inner wall and the lower inner wall of the rotating groove, a thin rotating rod is fixed on the circumferential surface of the connecting shaft, a thick rotating rod is rotatably connected on the circumferential surface of the connecting shaft, a clamping groove is formed in the right end of the thick rotating rod, connecting blocks are fixed at the front ends of the thin rotating rod and the thick rotating rod, a plurality of groups of uniformly distributed concave grooves are formed in the two connecting blocks close to one end, a first tension spring is arranged between each group of concave grooves, a plurality of first tension springs are clamped in the matched concave grooves through two annular buckles, two rotating plates are rotatably connected at the upper ends and the lower ends of the two connecting blocks through two first rotating shafts, and a connecting strip is fixed between the two rotating plates, the circumference surfaces of the two connecting strips are respectively sleeved with a connecting ring, the two connecting rings are respectively provided with a clamping piece, one end of a pull rope is fixed on the circumference surface of each connecting ring, and a first handle is fixed on the other end of each pull rope;
the transverse pull arm mechanism comprises a connecting plate, a spring sleeve, a second tension spring, a second universal rotating shaft and two second handles, wherein the number of the second universal rotating shaft and the number of the second handles are two, the connecting plate is fixed at the rear ends of the two shoulder straps, the spring sleeve is fixed at the rear end of the connecting plate, the second tension spring is movably inserted into the circumferential inner wall of the spring sleeve, the middle part of the second tension spring is fixed with the middle part of the circumferential inner wall of the spring sleeve, the two second universal rotating shafts are respectively fixed at the left end and the right end of the second tension spring, and the two second handles are respectively rotatably connected to the far ends of the two second universal rotating shafts;
every group guiding mechanism includes connecting rod, supplementary piece and changes the rod, the one end of connecting rod is fixed in the right-hand member of backplate, supplementary piece is fixed in the other end of connecting rod, it rotates through two second pivots and connects in the upper and lower inner wall of connecting rod to change the rod.
Preferably, a cloth placing bag is fixed at the front end of the back plate, a zipper is arranged at the front end of the cloth placing bag, wrapping cloth is arranged in the cloth placing bag, and the wrapping cloth is fixed with the rear inner wall of the cloth placing bag.
Preferably, the waistband is provided with a tightener.
Preferably, a first universal rotating shaft is arranged between each of the two pull ropes and each of the two first grips.
Preferably, the back end of the back plate is provided with a sponge rubber layer.
Preferably, the middle parts of the circumferential surfaces of the two rotating rods are provided with inward concave arc transitions.
Preferably, the two second grips and the first grip are provided with grooves matched with fingers.
Compared with the prior art, the invention has the beneficial effects that:
1. in this scheme, before using this device to carry out the arm strength training, at first can fix whole device behind one's back at the training person through two baldrics and a waistband, be similar to the state of schoolbag of carrying on the back, back is good, can train the arm strength through two first handles in the adjustable arm-drag mechanism, the horizontal arm-drag mechanism that also can make the training person arm through being located the training person chest simultaneously gives up the training effect that the different kinds of muscle of training person arm improves the device training arm strength that the point of force is different, whole device structure sets up ingeniously, the flexible operation, the security is high, let the training person can be better train the arm strength simultaneously, the practicality is stronger.
2. In the scheme, when the adjustable draw arm mechanism in the device is used, a trainer pulls the two first handles to drive the connected pull ropes and the connecting rings so as to enable the two connecting blocks to do opposite circular motion around the connecting shaft, the first tension springs connected with the two connecting blocks can generate reverse acting force, so that the effect of arm strength training of a trainer is realized, meanwhile, the annular buckles are arranged at the left end and the right end of the first tension springs, which means that, when the trainer feels that the strength of the arm strength training is too high, the first tension springs can be selectively detached to adjust the tension to the degree required by the trainer, so that the problem that the prior arm strength trainer is inconvenient to adjust the training strength is solved, this conveniently adjust arm strength training device of training intensity possesses the advantage of convenient regulation, has made things convenient for the user to use, has improved arm strength training device's practicality.
3. In this scheme, still set up in the device and be lieing in the horizontal single arm-drag mechanism of training person chest, the training person can come the pulling second tension spring through tensile two second handles, produces reverse effort, forms the training effect, and this kind of training mode can let the different types of muscle that take exercise training person's arm of the point of strength difference of training person's arm improve the training effect of device training arm power.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partial view taken at A of FIG. 1 in accordance with the present invention;
FIG. 3 is a rear perspective view of the present invention;
FIG. 4 is a partial view taken at B of FIG. 3 in accordance with the present invention;
FIG. 5 is a top view of the present invention.
In the figure: 1-a back plate; 2-shoulder straps; 3-waistband; 4, placing a cloth bag; 5, a zipper; 6-connecting rod; 7-an auxiliary block; 8-rotating a stick; 9-a protruding block; 10-a rotating groove; 11-a connecting shaft; 12-a thin rotating rod; 13-rough turning rod; 14-a card slot; 15-connecting blocks; 16-a concave groove; 17-a first tension spring; 18-ring snap; 19-rotating the plate; 20-a connecting strip; 21-a clamping piece; 22-a connecting ring; 23-a pull rope; 24-a first universal rotating shaft; 25-a first grip; 26-a tightener; 27-a connecting plate; 28-a spring sleeve; 29-a second tension spring; 30-a second universal rotating shaft; 31-second grip.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1 and 5, the present invention provides the following technical solutions: a physical arm strength trainer comprises a back plate 1, wherein shoulder belts 2 are fixed at the left and right ends of the rear end of the back plate 1, a waist belt 3 is fixed at the lower part of the rear end of the back plate 1, an adjustable arm-pulling mechanism is arranged at the front end of the back plate 1, a transverse arm-pulling mechanism is arranged between the two shoulder belts 2, and guide mechanisms are arranged at the left and right ends of the back plate 1;
before using this device to carry out the arm strength training, at first can fix whole device behind one's back at the training person through two baldrics 2 and a waistband 3, be similar to the state of schoolbag of carrying on the back, back is good, can train the arm strength through two first handles 25 in the adjustable arm-drag mechanism, also can make the exercise training person arm's the different training effect that improves device training arm strength of the different kinds of muscle of training person arm of point of origin difference through the horizontal arm-drag mechanism that is located training person chest simultaneously, whole device structure sets up ingeniously, the flexible operation, the security is high, let the training person can be better train the arm strength simultaneously, the practicality is stronger.
Specifically, referring to fig. 1 and 2, the adjustable arm-pulling mechanism includes a protruding block 9, a rotating groove 10 and a connecting shaft 11, the protruding block 9 is fixed at the front end of the backboard 1, the rotating groove 10 is arranged at the right end of the protruding block 9, the connecting shaft 11 is rotatably connected to the upper and lower inner walls of the rotating groove 10, a thin rotating rod 12 is fixed on the circumferential surface of the connecting shaft 11, a thick rotating rod 13 is rotatably connected to the circumferential surface of the connecting shaft 11, a clamping groove 14 is formed at the right end of the thick rotating rod 13, connecting blocks 15 are fixed at the front ends of the thin rotating rod 12 and the thick rotating rod 13, a plurality of groups of uniformly distributed concave grooves 16 are formed at the ends of the two connecting blocks 15, a first tension spring 17 is arranged between each group of concave grooves 16, the first tension springs 17 are clamped in the matched concave grooves 16 through two annular buckles 18, two rotating plates 19 are rotatably connected at the upper and lower ends of the two connecting blocks 15 through two, the connecting strips 20 are fixed between the two rotating plates 19, the connecting rings 22 are sleeved on the circumferential surfaces of the two connecting strips 20, the clamping pieces 21 are arranged on the two connecting rings 22, one ends of the pull ropes 23 are fixed on the circumferential surfaces of the two connecting rings 22, and the first handles 25 are fixed on the other ends of the two pull ropes 23.
In this embodiment: when the adjustable arm-pulling mechanism in the device is used, a trainer pulls the two first handles 25 to drive the connected pull ropes 23 and the connecting rings 22 so as to enable the two connecting blocks 15 to do opposite arc motions around the connecting shaft 11, and the first tension springs 17 connecting the two connection blocks 15 generate reverse acting force, which achieves the effect of the trainer's arm strength training, and the plurality of first tension springs 17 are provided at the left and right ends thereof with ring-shaped catches 18, that means, when the trainer feels that the strength of the arm strength training is too high, the first tension springs 17 can be selectively detached to adjust the tension to the degree required by the trainer, so that the problem that the prior arm strength trainer is inconvenient to adjust the training strength is solved, this conveniently adjust arm strength training device of training intensity possesses the advantage of convenient regulation, has made things convenient for the user to use, has improved arm strength training device's practicality.
Specifically, please refer to fig. 3 and 4, the transverse arm-pulling mechanism includes a connecting plate 27, a spring sleeve 28, a second tension spring 29, a second universal rotating shaft 30 and a second handle 31, two second universal rotating shafts 30 and two second handles 31 are provided, the connecting plate 27 is fixed at the rear ends of the two shoulder straps 2, the spring sleeve 28 is fixed at the rear end of the connecting plate 27, the second tension spring 29 is movably inserted into the circumferential inner wall of the spring sleeve 28, the middle part of the second tension spring 29 is fixed at the middle part of the circumferential inner wall of the spring sleeve 28, the two second universal rotating shafts 30 are respectively fixed at the left end and the right end of the second tension spring 29, and the two second handles 31 are respectively rotatably connected to the far ends of the two second universal rotating shafts 30.
In this embodiment: still set up in the device and lie in the horizontal single arm-drag mechanism of training person's chest, the training person can come the pulling second tension spring 29 through tensile two second handles 31, produce reverse effort, form the training effect, this kind of training mode can let the different types of muscle of training person's arm be tempered to the point of exertion difference of training person's arm and improve the training effect of device training arm power, the setting of two second universal spindle 30 can let the training person can find better arm-drag angle and the setting of spring sleeve 28 has also improved the protective capacities to the training person simultaneously.
Specifically, please refer to fig. 1 and 4, each guiding mechanism includes a connecting rod 6, an auxiliary block 7 and a rotating rod 8, one end of the connecting rod 6 is fixed at the right end of the back plate 1, the auxiliary block 7 is fixed at the other end of the connecting rod 6, and the rotating rod 8 is rotatably connected to the upper and lower inner walls of the connecting rod 6 through two second rotating shafts.
In this embodiment: the arrangement of the guide mechanism can lead the trainer to respectively clamp the two pull ropes 23 on the two rotating sticks 8 when the trainer trains and pulls the two first grips 25 for the arm strength, thereby being beneficial to the stability of the device training.
Specifically, as shown in fig. 1, a cloth placing bag 4 is fixed at the front end of the back plate 1, a zipper 5 is arranged at the front end of the cloth placing bag 4, a wrapping cloth is arranged in the cloth placing bag 4, and the wrapping cloth is fixed with the rear inner wall of the cloth placing bag 4.
In this embodiment: put cloth package 4 and put the setting of wrapping cloth in the cloth package 4 and can let the device can wrap up whole adjustable single arm-drag mechanism when not needing to use, will wrap up cloth through zip fastener 5 and take in when needing to use and put cloth package 4 in, it is very convenient to operate, has improved the functional diversity of device simultaneously.
Specifically, as shown in fig. 3, the waistband 3 is provided with a tightener 26.
In this embodiment: the tightener 26 is provided to facilitate the trainee to fix the whole device on the back better, and at the same time, it can be adapted to trainees with different waistlines, and for those skilled in the art, the above is the prior art, and will not be described in too much detail.
Specifically, as shown in fig. 3, a first universal shaft 24 is disposed between the two pull ropes 23 and the two first grips 25.
In this embodiment: the arrangement of the first universal rotating shaft 24 can enable a trainer to find a better arm-pulling angle, and meanwhile, the protection capability of the trainer is improved.
Specifically, the back end of the back plate 1 is provided with a sponge rubber layer.
In this embodiment: the sponge rubber layer arranged at the rear end of the back plate 1 can effectively improve the back comfort level of a trainer during arm strength training.
Specifically, as shown in fig. 4, the middle parts of the circumferential surfaces of the two rotating rods 8 are provided with inward-concave arc transitions.
In this embodiment: the inward sunken circular arc transition that rod 8's circumferential surface middle part all set up is changeed to two can avoid changeing rod 8 and lead to the fact the wearing and tearing of long-time use to stay cord 23, improves device life.
Specifically, as shown in fig. 5, grooves matched with fingers are formed in the two second grips 31 and the first grip 25.
In this embodiment: the grooves matched with the fingers are formed in the second grip 31 and the first grip 25, so that the comfort level of holding of the trainer during training can be improved.
The working principle and the using process of the invention are as follows: before the device is used for arm strength training, the whole device can be fixed on the back of a trainer through two shoulder belts 2 and a waist belt 3, the state is similar to that of a schoolbag, after the device is worn, the arm strength can be trained through two first handles 25 in an adjustable arm-pulling mechanism, meanwhile, the exercise effect of the arm strength of the trainer can be improved by exercising different types of muscles of the arm of the trainer through different force points of the arm of a horizontal arm-pulling mechanism positioned in the chest of the trainer, the whole device is ingenious in structure arrangement, flexible in operation and high in safety, meanwhile, the trainer can train the arm strength better, the practicability is strong, when the adjustable arm-pulling mechanism in the device is used, the trainer pulls the two first handles 25 to drive a connected pull rope 23 and a connecting ring 22 so as to enable two connecting blocks 15 to do opposite circular motion around a connecting shaft 11, the first tension springs 17 connected with the two connecting blocks 15 can generate reverse acting force, so that the training effect of the arm strength of the trainer is realized, meanwhile, the annular buckles 18 are arranged at the left end and the right end of the first tension springs 17, which means that when the trainer feels that the strength of the arm strength training is too high, the first tension springs 17 can be selectively detached to adjust the tension to the degree required by the trainer, thereby solving the problem that the prior arm strength training device is inconvenient to adjust the training strength, the arm strength training device convenient to adjust the training strength has the advantage of convenient adjustment, is convenient for the user to use, improves the practicability of the arm strength training device, is also provided with a transverse arm-pulling mechanism positioned in front of the chest of the trainer, and the trainer can pull the second tension spring 29 by stretching the two second handles 31 to generate the reverse acting force to form the training effect, the training mode can lead the force points of the arms of the trainer to be different to train different types of muscles of the arms of the trainer so as to improve the training effect of the device for training the arm strength.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A sports arm strength training device, its characterized in that: the novel back plate comprises a back plate (1), wherein shoulder belts (2) are fixed to the left and right sides of the rear end of the back plate (1), a waist belt (3) is fixed to the lower portion of the rear end of the back plate (1), an adjustable arm-pulling mechanism is arranged at the front end of the back plate (1), a transverse arm-pulling mechanism is arranged between the two shoulder belts (2), and guide mechanisms are arranged at the left and right ends of the back plate (1);
adjustable arm-drag mechanism is including outstanding piece (9), rotation groove (10) and connecting axle (11), outstanding piece (9) are fixed in the front end of backplate (1), rotate the right-hand member that groove (10) seted up in outstanding piece (9), connecting axle (11) are rotated and are connected in the upper and lower inner wall that rotates groove (10), the circumference fixed surface of connecting axle (11) has thin bull stick (12), the circumference surface of connecting axle (11) rotates and is connected with thick bull stick (13), draw-in groove (14) have been seted up to the right-hand member of thick bull stick (13), the front end of thin bull stick (12) and thick bull stick (13) all is fixed with connecting block (15), two connecting block (15) are close to one end mutually and all set up multiunit evenly distributed's concave groove (16), every group all be provided with first tension spring (17) between concave groove (16), and a plurality of first tension spring (17) all through two annular buckle (18) joint at assorted concave groove (17) (16) The upper ends and the lower ends of the two connecting blocks (15) are rotatably connected with two rotating plates (19) through two first rotating shafts, a connecting strip (20) is fixed between the two rotating plates (19), connecting rings (22) are sleeved on the circumferential surfaces of the two connecting strips (20), clamping pieces (21) are arranged on the two connecting rings (22), one ends of pull ropes (23) are fixed on the circumferential surfaces of the two connecting rings (22), and first handles (25) are fixed on the other ends of the two pull ropes (23);
the transverse pull arm mechanism comprises a connecting plate (27), two spring sleeves (28), two second tension springs (29), two second universal rotating shafts (30) and two second handles (31), the two second universal rotating shafts (30) and the two second handles (31) are arranged, the connecting plate (27) is fixed at the rear ends of the two shoulder straps (2), the spring sleeves (28) are fixed at the rear ends of the connecting plate (27), the second tension springs (29) are movably inserted into the circumferential inner wall of the spring sleeves (28), the middle parts of the second tension springs (29) are fixed with the middle parts of the circumferential inner walls of the spring sleeves (28), the two second universal rotating shafts (30) are respectively fixed at the left end and the right end of the second tension springs (29), and the two second handles (31) are respectively and rotatably connected to the far ends of the two second universal rotating shafts (30);
each group of guide mechanisms comprises a connecting rod (6), an auxiliary block (7) and a rotating rod (8), one end of the connecting rod (6) is fixed at the right end of the back plate (1), the auxiliary block (7) is fixed at the other end of the connecting rod (6), and the rotating rod (8) is rotatably connected to the upper inner wall and the lower inner wall of the connecting rod (6) through two second rotating shafts;
first universal rotating shafts (24) are arranged between the two pull ropes (23) and the two first grips (25).
2. The physical arm strength trainer according to claim 1, wherein: the front end of the back plate (1) is fixed with a cloth placing bag (4), the front end of the cloth placing bag (4) is provided with a zipper (5), wrapping cloth is arranged in the cloth placing bag (4), and the wrapping cloth is fixed with the rear inner wall of the cloth placing bag (4).
3. The physical arm strength trainer according to claim 1, wherein: a tightener (26) is arranged on the waistband (3).
4. The physical arm strength trainer according to claim 1, wherein: the rear end of the back plate (1) is provided with a sponge rubber layer.
5. The physical arm strength trainer according to claim 1, wherein: the middle parts of the circumferential surfaces of the two rotating rods (8) are provided with inward sunken circular arc transitions.
6. The physical arm strength trainer according to claim 1, wherein: grooves matched with fingers are formed in the second grip (31) and the first grip (25).
CN202010554032.1A 2020-06-17 2020-06-17 Sports arm strength training ware Active CN111672052B (en)

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CN207913085U (en) * 2017-12-16 2018-09-28 郭皓 A kind of ab lounge
CN107890647A (en) * 2017-12-29 2018-04-10 西京学院 A kind of physical culture arm strength training device
CN208081722U (en) * 2018-04-10 2018-11-13 襄阳市中心医院 A kind of upper limb stretch training exercising apparatus
CN208770780U (en) * 2018-06-27 2019-04-23 新昌县雷涛机械有限公司 A kind of sport behind formula chest-developer
CN209630508U (en) * 2019-03-08 2019-11-15 郑州儿童医院 A kind of children's rehabilitation arm exercises device
CN109966693A (en) * 2019-05-14 2019-07-05 河南交通职业技术学院 A kind of highly-safe arm strength training device
CN210205763U (en) * 2019-07-16 2020-03-31 南京铁道职业技术学院 Leg pressing trainer for sports

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