CN108525197B

CN108525197B - Barbell weight lifting protection device for body building

Info

Publication number: CN108525197B
Application number: CN201810240811.7A
Authority: CN
Inventors: 雷钦英; 鲁丹; 宋琪
Original assignee: Wenzhou Puqianlang Network Technology Co ltd
Current assignee: JIANGSU ZHONGSHANG CARBON INSTITUTE Co.,Ltd.
Priority date: 2018-03-22
Filing date: 2018-03-22
Publication date: 2020-03-24
Anticipated expiration: 2038-03-22
Also published as: CN108525197A

Abstract

The invention relates to a protection device, in particular to a barbell weight lifting protection device for fitness. The invention aims to provide a weight lifting protection device for a barbell for body building, which has simple and reliable structure, simple and easy operation and effective protection for an exerciser. In order to solve the technical problem, the invention provides a barbell weight lifting protection device for fitness, which comprises a bottom plate and the like; the top of the bottom plate is provided with a support, the top of the support is provided with a take-up mechanism, and the support is provided with a pay-off mechanism. According to the invention, the wire take-up mechanism and the wire release mechanism are matched with each other, the barbell is restrained to a certain degree, and meanwhile, the slow descending mechanism and the fixing mechanism are optimized, so that the effects of simple and reliable structure, simplicity and easiness in operation and capability of providing effective protection for an exerciser are achieved.

Description

Barbell weight lifting protection device for body building

Technical Field

The invention relates to a protection device, in particular to a barbell weight lifting protection device for fitness.

Background

The physical fitness mainly focuses on the body growth and development and physical development of students by taking physical exercise as a main means, focuses on the selection and study of fitness items and sports items, cultures the hobbies and sports specialties of the physical exercise of the students, obtains a scientific fitness method, develops a civilized and healthy life style, and has the adaptability of persisting in the physical exercise in different environments. Aerobic fitness equipment, strength fitness equipment, free weight equipment, most common running machines, elliptical machines, spinning bicycles, abdomen-building machines and the like.

Body-building barbell is because the quality is great, and when the physical power overdraft phenomenon appears after the exerciser used, because the dynamics of holding the body-building barbell reduces, and accident takes place easily, consequently need be equipped with certain protection device to body-building barbell, current protection device structure is complicated, complex operation, protection dynamics are less in the use, consequently need urgent need to develop a simple structure reliable, easy operation is simple, provide effective protection's barbell for body-building protection device to the exerciser.

Disclosure of Invention

(1) Technical problem to be solved

The invention aims to overcome the defects of complex structure, complex operation and small protection force of the conventional protection device in the using process, and the technical problem to be solved is to provide the barbell weight lifting protection device for body building, which has simple and reliable structure, simple and easy operation and effective protection on exercisers.

(2) Technical scheme

In order to solve the technical problem, the invention provides a barbell weight lifting protection device for fitness, which comprises a bottom plate, a support, a wire rewinding mechanism and a wire releasing mechanism, wherein the support is arranged at the top of the bottom plate, the wire rewinding mechanism is arranged at the top of the support, and the wire releasing mechanism is arranged on the support.

Preferably, the take-up mechanism comprises a mounting plate, a fixing shaft, a torsion spring, a winding drum and a first pull wire, the mounting plate is arranged at the top of the support, the fixing shaft is symmetrically arranged on the left side and the right side of the middle of the mounting plate, the torsion spring is wound on the fixing shaft, the winding drum is arranged at the other end of the torsion spring, the first pull wire is wound on the winding drum, and the tail end of the first pull wire is connected with the barbell.

Preferably, the paying-off mechanism comprises a fixed plate, a fixed rod, a spring seat, a reset spring, a first supporting rod, a first reel, a second pulling wire, a first fixed block, a third pulling wire, a second reel, a pulling ring, a ratchet wheel and a pawl, wherein the fixed plate is symmetrically arranged at the left and right positions in the middle of the bottom of the mounting plate, the middle of the front side of the fixed plate is hinged with the fixed rod, the spring seat is symmetrically arranged at the left and right ends of the front side of the mounting plate, the reset spring is connected between the spring seat and the fixed rod, the first supporting rod is vertically connected to the right side of the top of the mounting plate, the first reel is arranged at the top of the first supporting rod, the second pulling wire is wound on the first reel, one end of the second pulling wire is connected to the fixed rod at the right side, the other end of the second pulling wire is connected to the, the first wire guide hole is internally provided with a third stay wire, the left side of the top of the mounting plate is provided with a second reel, one end of the third stay wire is wound around the second reel and is connected to a fixed rod on the left side, the other end of the third stay wire is provided with a pull ring matched with the first fixed block, the front side of the reel is provided with a ratchet wheel, and the middle of the opposite surface of the fixed rod on the left side and the right side is symmetrically provided with a pawl matched with the ratchet wheel.

Preferably, still including slowly falling the mechanism, slowly fall the mechanism including first buffer block, the second buffer block, cushion rubber and second fixed block, the lateral symmetry in opposite directions of fixed plate front side is equipped with first buffer block, the bottom of controlling the dead lever of side is close to one side symmetry of first buffer block and is equipped with the second buffer block, the face in opposite directions of first buffer block and second buffer block all is equipped with cushion rubber, the bottom of fixed plate front side is equipped with the second fixed block, the middle part of second fixed block is opened there is the second wire guide, first acting as go-between passes the second wire guide.

Preferably, still including fixed establishment, fixed establishment is including the rotation axis, go up the chuck, lower chuck, anti-skidding rubber, cassette and fixing bolt, the trailing end connection of first acting as go-between has last chuck, the rear side of going up the chuck is equipped with the rotation axis, be equipped with on the rotation axis with last chuck complex lower chuck, the side symmetry in opposite directions of going up chuck and lower chuck is equipped with anti-skidding rubber, it all is equipped with the cassette with the front side of lower chuck to go up the chuck, open threaded hole in the cassette middle part of upper and lower below, threaded hole is equipped with complex fixing bolt with it.

Preferably, still including arc fixing base and buffering sponge, the centre at bottom plate top is equipped with the arc fixing base to the left and right position symmetry partially, is equipped with the buffering sponge in the arc fixing base.

The working principle is as follows: the in-process that the person of taking exercise carries out body-building through the barbell, under take-up mechanism and paying out machine construct mutually supporting, protects the barbell, and indirect realization is to the person's of taking exercise protection, and the person of taking exercise finishes the back, and control paying out machine constructs with the barbell reset can.

Because the take-up mechanism is including mounting panel, fixed axle, torsion spring, bobbin and the first acting as go-between, the top of support is equipped with the mounting panel, and the bilateral symmetry in mounting panel middle part is equipped with the fixed axle, and around having torsion spring on the fixed axle, torsion spring's the other end is equipped with the bobbin, and around having first acting as go-between on the bobbin, the trailing end of first acting as go-between is connected with the barbell. When an exerciser lifts the barbell upwards, the bobbin is driven to continuously take up the first pull wire under the action of the torsion spring, so that the first pull wire is always in a tight state, the barbell can be timely and effectively responded, the paying-off mechanism controls the bobbin to do one-way motion at the moment, the barbell cannot be injured due to sliding, when the exerciser needs to put the barbell downwards, the paying-off mechanism is controlled not to perform one-way control on the bobbin any more, the barbell can be reset, the operation steps are repeatedly performed, the barbell in the exercise process can be manually protected, and the using effect of the barbell protecting device is achieved.

Because the paying-off mechanism comprises a fixed plate, a fixed rod, a spring seat, a reset spring, a first supporting rod, a first reel, a second pulling wire, a first fixed block, a third pulling wire, a second reel, a pulling ring, a ratchet wheel and a pawl, the fixed plate is symmetrically arranged at the left and right positions in the middle of the bottom of the mounting plate, the fixed rod is hinged and connected to the middle of the front side of the fixed plate, the spring seats are symmetrically arranged at the left and right ends of the front side of the mounting plate, the reset spring is connected between the spring seat and the fixed rod, the first supporting rod is vertically connected to the right side of the top of the mounting plate, the first reel is arranged at the top of the first supporting rod, the second pulling wire is wound on the first reel, one end of the second pulling wire is connected to the fixed rod at the right side, the other end of the second pulling wire is connected to the fixed rod at the left side, the left side at mounting panel top is equipped with the second reel, and the one end that the third was acted as go-between is walked around the second reel and is connected on left dead lever, and the other end that the third was acted as go-between is equipped with the pull ring with first fixed block complex, and the front side of reel is equipped with the ratchet, and the middle part symmetry of the face in opposite directions of controlling the side dead lever is equipped with the pawl with ratchet complex. When the bobbin receives first acting line, the pawl that drives left and right sides all draws from the back of the tooth of ratchet, when first acting line is put to needs bobbin, the person of taking exercise stimulates the pull ring downwards, the pull ring drives left dead lever anticlockwise through the third acting line, left dead lever anticlockwise drives the dead lever clockwise on right side through the second acting line, so drive the pawl on the dead lever and no longer insert the ratchet, the person of taking exercise can put down the barbell, reset spring compression this moment, when the person of taking exercise upwards lifts up the barbell once more, loosen the pull ring, reset the dead lever under reset spring's effect, the dead lever ratchet can be with the pawl insert in the ratchet of ratchet, so relapse, can realize protecting the barbell of taking exercise in-process.

Because still including slowly falling the mechanism, slowly fall the mechanism including first buffer block, the second buffer block, cushion rubber and second fixed block, the lateral symmetry in opposite directions of fixed plate front side is equipped with first buffer block, the lateral symmetry that the bottom of controlling the dead lever of side is close to first buffer block is equipped with the second buffer block, first buffer block all is equipped with cushion rubber with the face in opposite directions of second buffer block, the bottom of fixed plate front side is equipped with the second fixed block, the middle part of second fixed block is opened there is the second wire guide, first acting as go-between passes the second wire guide. When the first pull wire is placed on the bobbin, the fixing rods on the left side and the right side drive the second buffer blocks to extrude the first pull wire on the first buffer blocks, so that the descending speed of the barbell can be controlled through the first pull wire, and meanwhile, the friction force of the first buffer blocks and the second buffer blocks on the first pull wire can be increased through the buffer rubber, so that the descending speed of the barbell is reduced more effectively, and the using effect of the barbell is improved.

Because still including fixed establishment, fixed establishment is including the rotation axis, go up the chuck, lower chuck, anti-skidding rubber, cassette and fixing bolt, the trailing end connection of first acting as go-between has last chuck, the rear side of going up the chuck is equipped with the rotation axis, be equipped with on the rotation axis with last chuck complex lower chuck, the side symmetry in opposite directions of going up chuck and lower chuck is equipped with anti-skidding rubber, it all is equipped with the cassette with the front side of lower chuck to go up the chuck, open threaded hole in the cassette middle part of upper and lower side, threaded hole is equipped with complex fixing bolt with it. An exerciser unscrews the fixing bolt out of the threaded hole, the upper chuck and the lower chuck can be opened at the moment, the upper chuck and the lower chuck are clamped on the connecting rod of the barbell, the upper chuck and the lower chuck are reset again, the fixing bolt is inserted into the threaded hole again, the fixing bolt is screwed down, and the subsequent barbell exercise operation can be performed after the clamping seat is fixed again, so that the barbell device is suitable for barbells of different specifications, and the using effect of the barbell device is improved.

Because still including arc fixing base and buffering sponge, the centre of bottom plate top is inclined to the left and inclined to the right position symmetry is equipped with the arc fixing base, is equipped with the buffering sponge in the arc fixing base. After the barbell is used, the barbell is placed on the arc-shaped fixing seat, so that the barbell can be prevented from rolling randomly, and meanwhile, the buffer sponge can increase the friction on the barbell, so that the barbell is more stably fixed on the arc-shaped fixing seat.

(3) Advantageous effects

According to the invention, the wire take-up mechanism and the wire release mechanism are matched with each other, the barbell is restrained to a certain degree, and meanwhile, the slow descending mechanism and the fixing mechanism are optimized, so that the effects of simple and reliable structure, simplicity and easiness in operation and capability of providing effective protection for an exerciser are achieved.

Drawings

Fig. 1 is a first front view structure diagram of the present invention.

Fig. 2 is a second front view structure diagram of the present invention.

Fig. 3 is a left side view of the fixing mechanism of the present invention.

Fig. 4 is a left side view of the arc-shaped fixing base of the present invention.

The labels in the figures are: 1-base plate, 2-bracket, 3-take-up mechanism, 31-mounting plate, 32-fixed shaft, 33-torsion spring, 34-bobbin, 35-first pull wire, 4-pay-off mechanism, 401-fixed plate, 402-fixed rod, 403-spring seat, 404-return spring, 405-first strut, 406-first reel, 407-second pull wire, 408-first fixed block, 409-first guide hole, 410-third pull wire, 411-second reel, 412-pull ring, 413-ratchet, 414-pawl, 5-barbell, 6-descent control mechanism, 61-first buffer block, 62-second buffer block, 63-buffer rubber, 64-second fixed block, 65-second guide hole, 7-fixing mechanism, 71-rotating shaft, 72-upper chuck, 73-lower chuck, 74-antiskid rubber, 75-clamping seat, 76-threaded hole, 77-fixing bolt, 8-arc-shaped fixing seat and 9-buffer sponge.

Detailed Description

The invention is further described below with reference to the figures and examples.

Example 1

A barbell weight lifting protection device for body building is shown in figures 1-4 and comprises a bottom plate 1, a support 2, a take-up mechanism 3 and a pay-off mechanism 4, wherein the support 2 is arranged at the top of the bottom plate 1, the take-up mechanism 3 is installed at the top of the support 2, and the pay-off mechanism 4 is installed on the support 2.

Example 2

The take-up mechanism 3 comprises a mounting plate 31, a fixed shaft 32, a torsion spring 33, a winding drum 34 and a first stay wire 35, the mounting plate 31 is arranged at the top of the bracket 2, the fixed shaft 32 is symmetrically arranged at the left side and the right side of the middle part of the mounting plate 31, the torsion spring 33 is wound on the fixed shaft 32, the winding drum 34 is arranged at the other end of the torsion spring 33, the first stay wire 35 is wound on the winding drum 34, and the barbell 5 is connected to the tail end of the first stay wire 35.

Example 3

The paying-off mechanism 4 comprises a fixing plate 401, a fixing rod 402, a spring seat 403, a return spring 404, a first supporting rod 405, a first reel 406, a second pull wire 407, a first fixing block 408, a third pull wire 410, a second reel 411, a pull ring 412, a ratchet 413 and a pawl 414, wherein the fixing plate 401 is symmetrically arranged at the left and right positions in the middle of the bottom of the mounting plate 31, the fixing rod 402 is hinged to the middle of the front side of the fixing plate 401, the spring seats 403 are symmetrically arranged at the left and right ends of the front side of the mounting plate 31, the return spring 404 is connected between the spring seats 403 and the fixing rod 402, the first supporting rod 405 is vertically connected to the right side of the top of the mounting plate 31, the first reel 406 is arranged at the top of the first supporting rod 405, the second pull wire 407 is wound on the first reel 406, one end of the second pull wire 407 is connected to the fixing rod, the middle of the left side of the bracket 2 is provided with a first fixing block 408, a first wire guide hole 409 is formed in the first fixing block 408, a third pull wire 410 is arranged in the first wire guide hole 409, the left side of the top of the mounting plate 31 is provided with a second reel 411, one end of the third pull wire 410 bypasses the second reel 411 and is connected to the fixing rod 402 on the left side, the other end of the third pull wire 410 is provided with a pull ring 412 matched with the first fixing block 408, the front side of the winding reel 34 is provided with a ratchet 413, and pawls 414 matched with the ratchet 413 are symmetrically arranged in the middle of the opposite surfaces of the fixing rods 402 on the left side and the right.

Example 4

Still including slowly falling mechanism 6, slowly falling mechanism 6 is including first buffer block 61, second buffer block 62, cushion rubber 63 and second fixed block 64, the lateral symmetry in opposite directions of fixed plate 401 front side is equipped with first buffer block 61, the bottom of controlling side dead lever 402 is close to a lateral symmetry of first buffer block 61 and is equipped with second buffer block 62, first buffer block 61 all is equipped with cushion rubber 63 with the face in opposite directions of second buffer block 62, the bottom of fixed plate 401 front side is equipped with second fixed block 64, open at the middle part of second fixed block 64 has second wire guide 65, first acting as go-between 35 passes second wire guide 65.

Still including fixed establishment 7, fixed establishment 7 is including rotation axis 71, go up chuck 72, lower chuck 73, anti-skidding rubber 74, cassette 75 and fixing bolt 77, the trailing end connection of first acting as go-between 35 has last chuck 72, the rear side of going up chuck 72 is equipped with rotation axis 71, be equipped with on the rotation axis 71 with last chuck 72 complex lower chuck 73, the opposite side symmetry of going up chuck 72 and lower chuck 73 is equipped with anti-skidding rubber 74, it all is equipped with cassette 75 with the front side of lower chuck 73 to go up chuck 72, open threaded hole 76 in the middle part of the cassette 75 of upper and lower below, be equipped with complex fixing bolt 77 with it in the threaded hole 76.

Still including arc fixing base 8 and buffering sponge 9, the centre at bottom plate 1 top is left partially and right position symmetry is equipped with arc fixing base 8 partially, is equipped with buffering sponge 9 in the arc fixing base 8.

The working principle is as follows: exerciser carries out the in-process of body-building through barbell 5, under take-up mechanism 3 and 4 mutually supporting of paying out machine, protects barbell 5, and indirect realization is to exerciser's protection, and exerciser tempers the back that finishes, and control paying out machine 4 with barbell 5 reset can.

Because the take-up mechanism 3 comprises the mounting plate 31, the fixing shaft 32, the torsion spring 33, the bobbin 34 and the first pull wire 35, the mounting plate 31 is arranged at the top of the bracket 2, the fixing shaft 32 is symmetrically arranged at the left side and the right side of the middle part of the mounting plate 31, the torsion spring 33 is wound on the fixing shaft 32, the bobbin 34 is arranged at the other end of the torsion spring 33, the first pull wire 35 is wound on the bobbin 34, and the barbell 5 is connected to the tail end of the first pull wire 35. When an exerciser lifts barbell 5 upwards, under the action of torsion spring 33, bobbin 34 is driven to continuously take up first pull wire 35, so that first pull wire 35 is always in a tight state, and then barbell 5 can be effectively and timely reacted, at the moment, unwinding mechanism 4 controls bobbin 34 to do one-way motion, barbell 5 cannot be injured due to slipping, when the exerciser needs to put barbell 5 downwards, unwinding mechanism 4 is controlled not to perform one-way control on bobbin 34, so that barbell 5 can be reset, the operation steps are repeatedly performed, barbell 5 in the exercise process can be manually protected, and the using effect of the barbell protection device is achieved.

Because the paying-off mechanism 4 comprises a fixed plate 401, a fixed rod 402, a spring seat 403, a return spring 404, a first supporting rod 405, a first reel 406, a second pull wire 407, a first fixed block 408, a third pull wire 410, a second reel 411, a pull ring 412, a ratchet 413 and a pawl 414, the fixed plate 401 is symmetrically arranged at the left and right positions in the middle of the bottom of the mounting plate 31, the fixed rod 402 is hinged and connected to the middle of the front side of the fixed plate 401, the spring seats 403 are symmetrically arranged at the left and right ends of the front side of the mounting plate 31, the return spring 404 is connected between the spring seats 403 and the fixed rod 402, the first supporting rod 405 is vertically connected to the right side of the top of the mounting plate 31, the first reel 406 is arranged at the top of the first supporting rod 405, the second pull wire 407 is wound on the first reel 406, one end of the second pull wire 407 is connected to the fixed, the middle of the left side of the bracket 2 is provided with a first fixing block 408, a first wire guide hole 409 is formed in the first fixing block 408, a third pull wire 410 is arranged in the first wire guide hole 409, the left side of the top of the mounting plate 31 is provided with a second reel 411, one end of the third pull wire 410 bypasses the second reel 411 and is connected to the fixing rod 402 on the left side, the other end of the third pull wire 410 is provided with a pull ring 412 matched with the first fixing block 408, the front side of the winding reel 34 is provided with a ratchet 413, and pawls 414 matched with the ratchet 413 are symmetrically arranged in the middle of the opposite surfaces of the fixing rods 402 on the left side and the right. When the first pulling wire 35 is wound on the bobbin 34, the left and right pawls 414 are all driven to pass through the teeth of the ratchet 413, when the first pulling wire 35 needs to be placed on the bobbin 34, an exerciser pulls the pulling ring 412 downward, the pulling ring 412 drives the left fixing rod 402 to rotate counterclockwise through the third pulling wire 410, the left fixing rod 402 rotates counterclockwise and drives the right fixing rod 402 to rotate clockwise through the second pulling wire 407, so that the pawl 414 on the fixing rod 402 is driven to be not inserted into the ratchet 413 any more, the exerciser can put down the barbell 5, the return spring 404 is compressed at this time, when the exerciser lifts up the barbell 5 again, the pulling ring 412 is released, the fixing rod 402 is reset under the action of the return spring 404, the fixing rod 402 can insert the pawl 414 into the ratchet of the ratchet 413, and the operation is repeated, so that the protection of the barbell 5 in the exercise process can be realized.

Because still including slowly falling mechanism 6, slowly falling mechanism 6 is including first buffer block 61, second buffer block 62, cushion rubber 63 and second fixed block 64, the sidesymmetric in opposite directions of fixed plate 401 front side is equipped with first buffer block 61, the side symmetry that the bottom of controlling side dead lever 402 is close to first buffer block 61 is equipped with second buffer block 62, first buffer block 61 all is equipped with cushion rubber 63 with second buffer block 62's the face in opposite directions, the bottom of fixed plate 401 front side is equipped with second fixed block 64, open at the middle part of second fixed block 64 has second wire guide 65, first acting as go-between 35 passes second wire guide 65. When the first pulling wire 35 is placed on the bobbin 34, the fixing rods 402 on the left and right sides drive the second buffer block 62 to press the first pulling wire 35 on the first buffer block 61, so that the descending speed of the barbell 5 can be controlled through the first pulling wire 35, and meanwhile, the buffer rubber 63 can increase the friction force of the first buffer block 61 and the second buffer block 62 on the first pulling wire 35, so that the descending speed of the barbell 5 is reduced more obviously, and the use effect of the invention is improved.

Because still including fixed establishment 7, fixed establishment 7 is including rotation axis 71, go up chuck 72, lower chuck 73, anti-skidding rubber 74, cassette 75 and fixing bolt 77, the end connection of first acting as go-between 35 has last chuck 72, the rear side of going up chuck 72 is equipped with rotation axis 71, be equipped with on the rotation axis 71 with last chuck 72 complex lower chuck 73, the opposite side symmetry of going up chuck 72 and lower chuck 73 is equipped with anti-skidding rubber 74, the front side of going up chuck 72 and lower chuck 73 all is equipped with cassette 75, open at the cassette 75 middle part of upper and lower below has screw hole 76, be equipped with the fixing bolt 77 with it complex in the screw hole 76. An exerciser screws the fixing bolt 77 out of the threaded hole 76, then the upper chuck 72 and the lower chuck 73 can be opened, the upper chuck 72 and the lower chuck 73 are clamped on the connecting rod of the barbell 5, the upper chuck 72 and the lower chuck 73 are reset again, the fixing bolt 77 is inserted into the threaded hole 76 again, the fixing bolt 77 is screwed, and the clamping seat 75 is fixed again, and then subsequent barbell 5 exercising operation can be carried out, so that the barbell 5 with different specifications is adapted to, and the using effect of the barbell is improved.

Because still including arc fixing base 8 and buffering sponge 9, the centre at bottom plate 1 top is left partially and right position symmetry is equipped with arc fixing base 8 partially, is equipped with buffering sponge 9 in the arc fixing base 8. After barbell 5 finishes using, place it on arc fixing base 8, can avoid barbell 5 to roll at will, cushion sponge 9 simultaneously and can increase the friction to barbell 5, make more firm fixing of barbell 5 on arc fixing base 8.

The above examples are merely representative of preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A barbell weight lifting protection device for body building is characterized by comprising a bottom plate (1), a support (2), a wire rewinding mechanism (3) and a wire unwinding mechanism (4), wherein the support (2) is arranged at the top of the bottom plate (1), the wire rewinding mechanism (3) is installed at the top of the support (2), and the wire unwinding mechanism (4) is installed on the support (2);

the take-up mechanism (3) comprises a mounting plate (31), a fixing shaft (32), a torsion spring (33), a winding drum (34) and a first pull wire (35), the mounting plate (31) is arranged at the top of the support (2), the fixing shaft (32) is symmetrically arranged on the left side and the right side of the middle part of the mounting plate (31), the torsion spring (33) is wound on the fixing shaft (32), the winding drum (34) is arranged at the other end of the torsion spring (33), the first pull wire (35) is wound on the winding drum (34), and the tail end of the first pull wire (35) is connected with a barbell (5);

the paying-off mechanism (4) comprises a fixing plate (401), a fixing rod (402), a spring seat (403), a reset spring (404), a first support rod (405), a first reel (406), a second pull wire (407), a first fixing block (408), a third pull wire (410), a second reel (411), a pull ring (412), a ratchet wheel (413) and a pawl (414), wherein the fixing plate (401) is symmetrically arranged at the left and right positions in the middle of the bottom of the mounting plate (31), the fixing rod (402) is hinged and connected to the middle of the front side of the fixing plate (401), the spring seats (403) are symmetrically arranged at the left and right ends of the front side of the mounting plate (31), the reset spring (404) is connected between the spring seats (403) and the fixing rod (402), the first support rod (405) is vertically connected to the right side of the top of the mounting plate (31), the first reel (406) is arranged at the top of the first support rod (405), and the, one end of a second pull wire (407) is connected to the fixing rod (402) on the right side, the other end of the second pull wire (407) is connected to the fixing rod (402) on the left side, a first fixing block (408) is arranged in the middle of the left side of the support (2), a first wire guide hole (409) is formed in the first fixing block (408), a third pull wire (410) is arranged in the first wire guide hole (409), a second reel (411) is arranged on the left side of the top of the mounting plate (31), one end of the third pull wire (410) bypasses the second reel (411) and is connected to the fixing rod (402) on the left side, a pull ring (412) matched with the first fixing block (408) is arranged at the other end of the third pull wire (410), a ratchet wheel (413) is arranged on the front side of the reel (34), and pawls (414) matched with the ratchet wheel (413) are symmetrically arranged in the middles of opposite.

2. The barbell weight lifting protection device for fitness according to claim 1, further comprising a slow descending mechanism (6), wherein the slow descending mechanism (6) comprises a first buffer block (61), a second buffer block (62), buffer rubber (63) and a second fixed block (64), the first buffer block (61) is symmetrically arranged on the front side of the fixed plate (401) in the opposite direction, the second buffer block (62) is symmetrically arranged on the side, close to the first buffer block (61), of the bottom of the left and right side fixed rods (402), the buffer rubber (63) is arranged on the opposite surfaces of the first buffer block (61) and the second buffer block (62), the second fixed block (64) is arranged at the bottom of the front side of the fixed plate (401), a second wire guide hole (65) is formed in the middle of the second fixed block (64), and the first pull wire (35) penetrates through the second wire guide hole (65).

3. A barbell weight lifting protection device for fitness according to claim 2, further comprising a fixing mechanism (7), wherein the fixing mechanism (7) comprises a rotating shaft (71), an upper chuck (72) and a lower chuck (73), the anti-skidding rubber (74), cassette (75) and fixing bolt (77), the end connection of first acting as go-between (35) has last chuck (72), the rear side of going up chuck (72) is equipped with rotation axis (71), be equipped with on rotation axis (71) with last chuck (72) complex lower chuck (73), upward chuck (72) and the side symmetry in opposite directions of lower chuck (73) are equipped with anti-skidding rubber (74), the front side of going up chuck (72) and lower chuck (73) all is equipped with cassette (75), open at the cassette (75) middle part of upper and lower place has screw hole (76), be equipped with in screw hole (76) with it complex fixing bolt (77).

4. A barbell weight lifting protection device for fitness according to claim 3, further comprising an arc-shaped fixing seat (8) and a buffer sponge (9), wherein the arc-shaped fixing seat (8) is symmetrically arranged at the left and right positions in the middle of the top of the bottom plate (1), and the buffer sponge (9) is arranged in the arc-shaped fixing seat (8).