CN113648603A

CN113648603A - High tension dorsal muscle training ware with adjustable security is high

Info

Publication number: CN113648603A
Application number: CN202110951074.3A
Authority: CN
Inventors: 张学成; 朱作庆; 张友民; 李庆国
Original assignee: Linyi Vocational Colledge
Current assignee: Linyi Vocational Colledge
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2021-11-16
Anticipated expiration: 2041-08-18
Also published as: CN113648603B

Abstract

The invention relates to an adjustable high-tension dorsal muscle trainer with high safety, which comprises a bearing seat, support columns, support pedals, a protective sleeve and an adjusting box, wherein the support columns are uniformly arranged on the lower end surface of the bearing seat in a welding mode, the support pedals are symmetrically arranged at two ends of the bearing seat, the protective sleeve is arranged on the bearing seat, and the adjusting box is arranged at the outer side of the protective sleeve, so that the adjustable high-tension dorsal muscle trainer can solve the following problems in the process of exercising the traditional dorsal muscle: a, when the existing dorsal muscle trainer is used, the palm is usually sweated, so that the palm grasping part and the palm are separated from each other in a sliding way, and certain potential safety hazards exist; b: when carrying out weight adjustment, the current dorsal muscle training ware often needs the artifical installation of independently carrying out the balancing weight, and it is comparatively troublesome to operate, extravagant manpower.

Description

High tension dorsal muscle training ware with adjustable security is high

Technical Field

The invention relates to the technical field of muscle exercise, in particular to an adjustable high-tension dorsal muscle trainer with high safety.

Background

Fitness is a sport, such as various freehand aerobics, rhythmic exercises, gymnastics, and various self-resistance movements, gymnastics, yoga can enhance strength, flexibility, endurance, coordination, and control the ability of each part of the body, so as to make the body strong, if the purpose of relieving stress is to be achieved, some of them exercise their muscles, such as dorsal muscle, pectoralis muscle, biceps muscle, deltoid muscle, etc., wherein, when the muscle dorsal muscles of each part are exercised and lifted, the human body is easy to be injured, and the training intensity needs to be changed aiming at the personnel with different strength, furthermore, a special training device for the back muscle is needed to train the back muscle, but the existing training device for the back muscle still has certain defects when being used.

The existing dorsal muscles often have the following problems in the process of exercising: a, when the existing dorsal muscle trainer is used, the palm is usually sweated, so that the palm grasping part and the palm are separated from each other in a sliding way, and certain potential safety hazards exist; b: when carrying out weight adjustment, the current dorsal muscle training ware often needs the artifical installation of independently carrying out the balancing weight, and it is comparatively troublesome to operate, extravagant manpower.

In order to make up for the defects of the prior art, the invention provides the adjustable high-tension dorsal muscle trainer with high safety.

Disclosure of Invention

The technical scheme adopted by the invention to solve the technical problem is as follows: the utility model provides a high tension back muscle training ware with adjustable security is high, includes bearing seat, support column, support footboard, protection cover spare and regulating box, evenly installs the support column through the welded mode on the terminal surface under the bearing seat, and bearing seat both ends symmetry is installed and is supported the footboard, installs protection cover spare on the bearing seat, and the regulating box is installed in protection cover spare outside, wherein:

the protective sleeve piece comprises a supporting plate, an upper cover plate, a guide rope sleeve, a traction rope, a stop block, a connecting block, a traction pull rod and a guide wheel, the supporting plate is fixedly arranged on the side wall of a bearing seat, the upper cover plate is fixedly arranged on the supporting plate, a through hole A is formed in the upper cover plate, the guide rope sleeve is fixedly arranged on the upper cover plate, the traction rope is arranged in the guide rope sleeve in a sliding connection mode, one end of the traction rope penetrates through the through hole A, the stop block is arranged on the traction rope, the connecting block is arranged at the head of the traction rope, the traction pull rod is arranged on the connecting block, the lower end of the traction rope is abutted against the guide wheel, the guide wheel is arranged on the supporting plate in a rotating connection mode, when the protective sleeve piece works, a human body sits on the bearing seat, two feet are placed on a supporting pedal, then the traction pull rod is manually held, the traction rope is driven to move through the connection effect of the connecting block, and a balancing weight in the adjusting box is pulled to move upwards, thereby completing the dorsal muscle exercise.

The regulating box includes the alignment jig, interior slide bar, the alignment jig, balancing weight and lifting picture peg, alignment jig and lag spare are connected, spout F has been seted up to the symmetry on the alignment jig, the inside symmetry of alignment jig installs interior slide bar, install the alignment jig through sliding connection's mode on the interior slide bar, the alignment jig upper end is connected with the haulage rope, the haulage rope passes the alignment jig, the alignment jig below evenly is provided with the balancing weight, the balancing weight passes through sliding connection's mode and installs on the slide bar including, the symmetry is installed the lifting picture peg that uses of mutually supporting with spout F on the alignment jig, in operation, the manual work inserts the lifting picture peg to the alignment jig inside according to self ability, and insert among the logical groove H of keeping away of balancing weight, later because of artifical pulling traction stay, drive alignment jig and balancing weight upward movement through the haulage rope effect, thereby realize back of the body muscle training operation.

As a preferred technical scheme of the invention, the guide rope sleeve is of a horn-shaped structure, the inner wall of the guide rope sleeve is uniformly provided with the traction rotating wheels in a rotating connection mode, the guide rope sleeve is uniformly provided with the buffer strips in a rotating connection mode, the buffer strips are made of rubber materials, and the shock absorption springs are connected between the buffer strips and the guide rope sleeve.

As a preferable technical scheme of the invention, spherical balls are uniformly arranged on the lower end surface of the stop block in a rotating connection mode, the section of the stop block is of a T-shaped structure, contact pressure plates are uniformly arranged on the stop block in a sliding connection mode, and the contact pressure plates are connected with the stop block through buffer springs.

As a preferred technical scheme, a threaded hole B is formed in the connecting block, a stable inserting plate is installed on the connecting block, the stable inserting plate is of a cross structure, rubber ropes are evenly arranged on the stable inserting plate, a threaded sleeve is installed at the head of the rubber rope at the left end of the traction pull rod, and a threaded block matched with the threaded sleeve for use is installed at the head of the rubber rope at the right end of the traction pull rod.

As a preferred technical scheme of the invention, the traction pull rod is of a structure like a Chinese character 'ji', a connecting screw rod which is matched with the threaded hole B and used is fixedly arranged on the traction pull rod, a water-absorbing sponge sleeve is wrapped on the traction pull rod, a holding sleeve is wrapped on the outer side of the water-absorbing sponge sleeve, the surface of the holding sleeve is frosted, communication holes D are uniformly formed in the surface of the holding sleeve, a connecting ring is uniformly arranged on the traction pull rod, and a abdicating hole E matched with the threaded sleeve for use is formed in the connecting ring.

According to a preferable technical scheme, the cross section of the adjusting frame is of a U-shaped structure, the adjusting frame is uniformly provided with insertion holes G, lifting insertion plates are matched with each other for use, traction frames are symmetrically arranged in the adjusting frame in a sliding connection mode, a stretching spring is connected between each traction frame and the adjusting frame, connecting insertion rods are uniformly arranged on each traction frame, the upper end of each traction frame is fixedly provided with a sliding pulling plate, and the sliding pulling plates are connected with traction ropes.

As a preferred technical scheme of the invention, the balancing weight is uniformly provided with avoiding through grooves H which are matched with the lifting plugboard for use, and the lower end surface of the balancing weight is uniformly provided with punctiform bulges.

As a preferable technical scheme of the invention, the lifting plugboard is provided with a butt joint hole I which is matched with the connecting plugboard for use, the lifting plugboard is fixedly provided with a pulling ring, and the joint of the pulling ring and the lifting plugboard is uniformly provided with spherical balls in a rotating connection mode.

Compared with the prior art, the invention has the following advantages:

1. the invention can solve the following problems of the existing dorsal muscle during exercise: a, when the existing dorsal muscle trainer is used, the palm is usually sweated, so that the palm grasping part and the palm are separated from each other in a sliding way, and certain potential safety hazards exist; b: when carrying out weight adjustment, the current dorsal muscle training ware often needs the artifical installation of independently carrying out the balancing weight, and it is comparatively troublesome to operate, extravagant manpower.

2. The anti-slip sleeve is designed, the traction pull rod is of the structure in the shape of the Chinese character 'ji', so that a human body can conveniently grab the anti-slip sleeve, meanwhile, the anti-slip sleeve can avoid colliding with the head of the human body, then when a human hand grasps the surface of the handheld sleeve, the surface of the handheld sleeve can increase friction force with a palm due to frosting texture, and meanwhile when the palm is shout, sweat is absorbed by the water-absorbing sponge sleeve through the communication hole D, so that the phenomenon that the traction pull rod and the hand slide down due to the sweat can be greatly avoided, and the safety during exercise is improved.

3. According to the invention, the adjusting box is designed, the lifting inserting plate is manually inserted into the adjusting frame according to the self capacity and is inserted into the avoiding through groove H of the balancing weight, the number of the balancing weight above the lifting inserting plate is adjusted through different inserted heights, the purpose of adjusting the balancing weight is further achieved, the weight adjusting operation is simple and rapid, and the manpower is greatly saved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the structural schematic of the present invention;

FIG. 3 is a schematic cross-sectional view A-A of FIG. 2 of the present invention;

FIG. 4 is a schematic cross-sectional view B-B of FIG. 3 of the present invention;

FIG. 5 is a schematic structural view of the region C of FIG. 3 according to the present invention;

FIG. 6 is a schematic structural diagram of a weight member according to the present invention;

FIG. 7 is a schematic structural view of the region C of FIG. 2 in accordance with the present invention;

fig. 8 is a schematic view of the structure of the guide rope sling according to the invention;

FIG. 9 is a schematic view of the stop block of the present invention.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further explained with reference to fig. 1 to 9.

The utility model provides a high pulling force dorsal muscle training ware with adjustable security is high, includes bearing seat 1, support column 2, support footboard 3, lag spare 4 and regulating box 5, evenly installs support column 2 through the welded mode on the bearing seat 1 lower terminal surface, and 1 both ends symmetry of bearing seat is installed and is supported footboard 3, installs lag spare 4 on the bearing seat 1, and regulating box 5, wherein are installed in lag spare 4 outsides:

the protective sleeve piece 4 comprises a supporting plate 41, an upper cover plate 42, a guide rope sleeve 43, a traction rope 44, a stop block 45, a connecting block 46, a traction pull rod 47 and a guide wheel 48, the supporting plate 41 is fixedly arranged on the side wall of the bearing seat 1, the upper cover plate 42 is fixedly arranged on the supporting plate 41, a through hole A is formed in the upper cover plate 42, the guide rope sleeve 43 is fixedly arranged on the upper cover plate 42, the traction rope 44 is arranged in the guide rope sleeve 43 in a sliding connection mode, one end of the traction rope 44 penetrates through the through hole A, the stop block 45 is arranged on the traction rope 44, the connecting block 46 is arranged at the head of the traction rope 44, the traction pull rod 47 is arranged on the connecting block 46, the lower end of the traction rope 44 is abutted against the guide wheel 48, the guide wheel 48 is arranged on the supporting plate 41 in a rotating connection mode, during specific work, a human body sits on the bearing seat 1, two feet are placed on the supporting pedal 3, and then the traction pull rod 47 is manually held to be pulled, the pulling rope 44 is driven to move along the guiding rope sleeve 43 by the connecting action of the connecting block 46, so that the balancing weight 54 inside the adjusting box 5 is pulled to move upwards, and the dorsal muscle exercise is completed.

The guide rope sleeve 43 is of a horn-shaped structure, the traction rotating wheels 431 are uniformly arranged on the inner wall of the guide rope sleeve 43 in a rotating connection mode, the buffer strips 432 are uniformly arranged on the guide rope sleeve 43 in a rotating connection mode, the buffer strips 432 are made of rubber materials, the damping springs 433 are connected between the buffer strips 432 and the guide rope sleeve 43, when the drawing rope 44 slides in the guide rope sleeve 43 in specific work, the traction rotating wheels 431 rotate to reduce the friction force between the traction rotating wheels 431 and the drawing rope 44 and enable the drawing rope 44 to move more smoothly, when the palm and the drawing pull rod 47 slide off due to sweat, the drawing rope 44 moves towards the left side due to the traction effect of the balance weight 54, so that the stop block 45 is in contact with the buffer strips 432 on the guide rope sleeve 43, the buffer strips 432 rotate to stop the stop block 45 and act through the damping springs 433, the sliding speed of the stop block 45 can be reduced, the sliding speed of the balancing weight 54 can be reduced, the balancing weight 54 can be protected, and the situation that the balancing weight 54 is damaged due to downward sliding at a high speed is avoided.

Stop evenly being provided with spherical ball through the mode of rotating the connection on the terminal surface under backstop piece 45, stop backstop piece 45 cross-section is T shape structure, stop evenly to install contact pressure plate 451 through sliding connection's mode on the backstop piece 45, be connected through buffer spring 452 between contact pressure plate 451 and the backstop piece 45, in concrete work, when stopping backstop piece 45 and following haulage rope 44 and moving towards the left side, because of contact pressure plate 451 and buffer strip 432 position one-to-one, contact pressure plate 451 and buffer strip 432 extrude each other, buffer strip 432 is rotated to the outside, and act on through buffer spring 433, can slow down haulage rope 44's the speed of sliding, when buffer strip 432 stall, because of the squeezing action, buffer spring 452 shrink, thereby can be better play the cushioning effect to haulage rope 44's motion.

The connecting block 46 is provided with a threaded hole B, the connecting block 46 is provided with a stable inserting plate 461, the stable inserting plate 461 is of a cross structure, the stable inserting plate 461 is evenly provided with a rubber rope 462, the head of the rubber rope 462 at the left end of the traction pull rod 47 is provided with a threaded sleeve 463, the head of the rubber rope 462 at the right end of the traction pull rod 47 is provided with a threaded block 464 which is matched with the threaded sleeve 463 for use, during specific work, the rubber rope 462 with the threaded sleeve 463 at the left end part is manually pulled to be inserted into a yielding hole E on the connecting ring 473, then the threaded block 464 is manually screwed into the threaded sleeve 463, so that two ends of the traction pull rod 47 can be hung through the rubber rope 462, the stability during the movement of the traction pull rod 47 is greatly ensured, and meanwhile, when the balancing weight block 54 drives the traction rope 44 to slide towards the left side, the stable inserting plate 461 moves upwards along with the traction rope 44 and contacts with the upper cover plate 42, haulage rope 44 stop motion during the contact to can avoid taking place the contact striking between traction pull rod 47 and the upper cover plate 42, and then make the condition of traction pull rod 47 deformation take place, simultaneously because of stabilizing picture peg 461 and being the cruciform structure, and there is great area of contact between the upper cover plate 42, and then can go out the impact force dispersion that self received, prolonged the life who stabilizes picture peg 461.

The traction pull rod 47 is of a structure like a Chinese character 'ji', a connecting screw 474 which is matched with and used with the threaded hole B is fixedly installed on the traction pull rod 47, a water-absorbing sponge sleeve 471 is wrapped on the traction pull rod 47, a hand-holding sleeve 472 is wrapped on the outer side of the water-absorbing sponge sleeve 471, the surface of the hand-holding sleeve 472 is frosted, communication holes D are uniformly formed in the surface of the hand-holding sleeve 472, a connecting ring 473 is uniformly installed on the traction pull rod 47, a abdicating hole E which is matched with the threaded sleeve 463 for use is formed in the connecting ring 473, in the specific work process, the traction pull rod 47 is of a structure like a Chinese character 'ji', so that a human body can be conveniently grabbed, meanwhile, the collision with the head of the human body can be avoided, then, when the human body is held on the surface of the hand-holding sleeve 472, the surface of the hand-holding sleeve 472 can be frosted to increase the friction force between the palm, and meanwhile, when sweat exists on the palm, the sweat is absorbed by the water-absorbing sponge sleeve 471 through the communication holes D, and then can very big avoid because of sweat leads to the condition emergence of landing between traction pull rod 47 and the hand to security when having improved the exercise.

The adjusting box 5 comprises an adjusting frame 51, an inner slide rod 52, an adjusting frame 53, a balancing weight 54 and a lifting inserting plate 55, the adjusting frame 51 is connected with the protective sleeve 4, sliding grooves F are symmetrically formed in the adjusting frame 51, the inner slide rod 52 is symmetrically arranged in the adjusting frame 51, the adjusting frame 53 is arranged on the inner slide rod 52 in a sliding connection mode, the upper end of the adjusting frame 53 is connected with a traction rope 44, the traction rope 44 penetrates through the adjusting frame 51, the balancing weight 54 is uniformly arranged below the adjusting frame 53, the balancing weight 54 is arranged on the inner slide rod 52 in a sliding connection mode, the lifting inserting plate 55 matched with the sliding grooves F is symmetrically arranged on the adjusting frame 53, during specific work, the lifting inserting plate 55 is manually inserted into the adjusting frame 53 according to self capacity and is inserted into a position avoiding through groove H of the balancing weight 54, then, the traction pull rod 47 is manually pulled, the adjusting frame 51 and the balancing weight 54 are driven to move upwards through the action of the traction rope 44, thereby realizing the training of the dorsal muscles.

The section of the adjusting frame 53 is of a U-shaped structure, the adjusting frame 53 is uniformly provided with insertion holes G through which the lifting insertion plates 55 are matched with each other, the inside of the adjusting frame 53 is symmetrically provided with a traction frame 531 in a sliding connection mode, a tension spring 532 is connected between the traction frame 531 and the adjusting frame 53, the traction frame 531 is uniformly provided with connecting insertion rods 533, the upper end of the traction frame 531 is fixedly provided with a sliding pull plate 534, the sliding pull plate 534 is connected with a traction rope 44, during specific work, the lifting insertion plates 55 are manually inserted into the insertion holes G and enter a clearance through groove H on the balancing weight 54, then the traction rope 44 is manually pulled to drive the sliding pull plate 534 to move upwards, so that the traction frame 531 is driven to move upwards, the connecting insertion rods 533 are inserted into butt joint holes I on the lifting insertion plates 55, the adjusting frame 53 and the balancing weight 54 are integrated, and the safety during dorsal muscle training is greatly ensured, then the pulling rope 44 is pulled manually to drive the adjusting frame 53 to move upwards, so as to achieve the purpose of back muscle training, after the back muscle training is completed, the pulling pull rod 47 is loosened, the adjusting frame 53 returns to the original position due to gravity, the extension spring 532 contracts, and the pulling frame 531 is driven to move downwards, so that the connecting insertion rod 533 and the lifting insertion plate 55 are separated.

Evenly set up on the balancing weight 54 and mutually support the logical groove H of keeping away of using with lifting picture peg 55, evenly be provided with the punctiform arch on the terminal surface under the balancing weight 54, concrete during operation, evenly be provided with the punctiform arch on the terminal surface under the balancing weight 54, thereby can avoid appearing gluing because of placing for a long time between the adjacent balancing weight 54, when leading to carrying out the dorsal muscle training, can take the balancing weight 54 of lower extreme when pulling traction rod 47, take the balancing weight 54 after having risen, because of gravity reason heavy falling, the condition that the training personnel of the terrible of loud sound appears takes place.

Set up on the lifting picture peg 55 and be connected the butt joint hole I that inserted bar 513 used of mutually supporting, fixed mounting pulls ring 551 on the lifting picture peg 55, pulls ring 551 and lifting picture peg 55 combination department and evenly is provided with spherical ball through the mode of rotating the connection, and during concrete work, when artifical pulling pull rod 47, when driving the motion of alignment jig 53, lifting picture peg 55 slides along spout F, and spherical ball on the lifting picture peg 55 lateral wall can be very big the reduction lifting picture peg 55 and the frictional force between the alignment jig 51.

When in work:

s1, counterweight adjustment: manually inserting the lifting inserting plate 55 into the adjusting frame 53 according to the self capacity and into the avoiding through groove H of the balancing weight 54, thereby completing the balancing weight adjusting operation;

s2, dorsal muscle exercising: a human body sits on the bearing seat 1, two feet are placed on the supporting pedal 3, then the traction pull rod 47 is manually held to drive the sliding pull plate 534 to move upwards, so that the traction frame 531 is driven to move upwards, the connecting insertion rod 533 is inserted into the butt joint hole I on the lifting insertion plate 55, the adjusting frame 53 and the balancing weight 54 are integrated, the safety during dorsal muscle training is greatly ensured, and then the traction rope 44 is manually pulled to drive the adjusting frame 53 to move upwards, so that dorsal muscle training operation is realized;

s3, stopping exercising: after the dorsal muscle exercise is completed, the traction pulling plate 47 is manually loosened, the traction rope 44 moves towards the left side due to the traction effect of the counterweight 54, so that the stop block 45 is in contact with the buffer strip 432 on the guide rope sleeve 43, the buffer strip 432 rotates to block the stop block 45, and the sliding speed of the stop block 45 can be reduced under the action of the damping spring 433, so that the sliding speed of the counterweight block 54 can be reduced, the counterweight block 54 can be protected, the counterweight block 54 is prevented from sliding downwards at a high speed, the counterweight block 54 is prevented from being damaged, and the exercise is stopped;

s4, repeating the steps S1-S3, and continuously carrying out dorsal muscle exercise.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a high tension dorsal muscle training ware with adjustable security is high, includes bearing seat (1), support column (2), support footboard (3), prevents sheath spare (4) and regulating box (5), its characterized in that: support column (2) are evenly installed through the welded mode on the terminal surface under bearing seat (1), and bearing seat (1) both ends symmetry is installed and is supported footboard (3), installs on bearing seat (1) and prevents sheath spare (4), prevents that sheath spare (4) outside is installed regulating box (5), wherein:

the protective sleeve piece (4) comprises a supporting plate (41), an upper cover plate (42), a guide rope sleeve (43), a traction rope (44), a stop block (45), a connecting block (46), a traction pull rod (47) and a guide wheel (48), wherein the supporting plate (41) is fixedly installed on the side wall of the bearing seat (1), the supporting plate (41) is fixedly provided with the upper cover plate (42), the upper cover plate (42) is provided with a through hole A, the upper cover plate (42) is fixedly provided with the guide rope sleeve (43), the traction rope (44) is installed inside the guide rope sleeve (43) in a sliding connection mode, one end of the traction rope (44) penetrates through the through hole A, the stop block (45) is installed on the traction rope (44), the connecting block (46) is installed at the head of the traction rope (44), the traction pull rod (47) is installed on the connecting block (46), and the lower end of the traction rope (44) is abutted against the guide wheel (48), the guide wheel (48) is arranged on the support plate (41) in a rotating connection mode;

regulating box (5) are including adjusting frame (51), interior slide bar (52), alignment jig (53), balancing weight (54) and lifting picture peg (55), adjusting frame (51) are connected with protection cover spare (4), spout F has been seted up to the symmetry on adjusting frame (51), adjusting frame (51) internal symmetry installs interior slide bar (52), alignment jig (53) are installed through sliding connection's mode on interior slide bar (52), alignment jig (53) upper end and haulage rope (44) are connected, haulage rope (44) pass alignment jig (51), alignment jig (53) below evenly is provided with balancing weight (54), sliding bar (52) are including sliding connection's mode is installed in balancing weight (54), lifting picture peg (55) that use mutually supported with spout F are installed to the symmetry on alignment jig (53).

2. The adjustable high-tension dorsal muscle trainer with high safety as claimed in claim 1, wherein: guide rope cover (43) are horn structure, evenly are provided with on guide rope cover (43) the inner wall through the mode of rotating the connection and pull runner (431), evenly install buffering strip (432) through the mode of rotating the connection on guide rope cover (43), and buffering strip (432) constitute for the rubber material, are connected with damping spring (433) between buffering strip (432) and guide rope cover (43).

3. The adjustable high-tension dorsal muscle trainer with high safety as claimed in claim 1, wherein: stop evenly being provided with spherical ball on backstop piece (45) lower extreme face through the mode of rotating the connection, stop backstop piece (45) cross-section and be T shape structure, stop evenly installing contact clamp plate (451) through sliding connection's mode on backstop piece (45), be connected through buffer spring (452) between contact clamp plate (451) and the backstop piece (45).

4. The adjustable high-tension dorsal muscle trainer with high safety as claimed in claim 1, wherein: threaded hole B is seted up on connecting block (46), install on connecting block (46) and stabilize picture peg (461), stabilize picture peg (461) and be the cruciform structure, evenly be provided with rubber rope (462) on stabilizing picture peg (461), screw thread cover (463) are installed to pull rod (47) left end rubber rope (462) head, pull rod (47) right-hand member rubber rope (462) head install with screw thread cover (463) screw thread piece (464) that use of mutually supporting.

5. The adjustable high-tension dorsal muscle trainer with high safety as claimed in claim 4, wherein: traction pull rod (47) is several style of calligraphy structures, fixed mounting has connecting screw (474) with screw hole B is mutually supported and is used on traction pull rod (47), the parcel has sponge cover (471) that absorbs water on traction pull rod (47), sponge cover (471) that absorbs water outside parcel has held sleeve pipe (472), it feels for the dull polish to hold sleeve pipe (472) surface, it evenly is provided with intercommunicating pore D to hold sleeve pipe (472) surface, evenly install go-between (473) on traction pull rod (47), set up on go-between (473) and screw thread cover (463) the hole E of stepping down of mutually supporting the use.

6. The adjustable high-tension dorsal muscle trainer with high safety as claimed in claim 1, wherein: the cross-section of adjusting bracket (53) is the U-shaped structure, has evenly seted up lifting picture peg (55) on adjusting bracket (53) and has mutually supported the interlude hole G that uses, and traction frame (531) are installed through sliding connection's mode symmetry to adjusting bracket (53) inside, are connected with extension spring (532) between traction frame (531) and adjusting bracket (53), evenly install on traction frame (531) and connect inserted bar (533), and traction frame (531) upper end fixed mounting has simultaneous arm-tie (534), and simultaneous arm-tie (534) and haulage rope (44) are connected.

7. The adjustable high-tension dorsal muscle trainer with high safety as claimed in claim 1, wherein: a position avoiding through groove H matched with the lifting inserting plate (55) for use is uniformly formed in the balancing weight (54), and punctiform protrusions are uniformly arranged on the lower end face of the balancing weight (54).

8. The adjustable high-tension dorsal muscle trainer with high safety as claimed in claim 6, wherein: the butt joint hole I that uses with being connected inserted bar (513) and mutually supporting is seted up on lifting picture peg (55), and fixed mounting pulls on lifting picture peg (55) and draws ring (551), draws ring (551) and lifting picture peg (55) combination department and evenly is provided with spherical ball through the mode of rotating the connection.