CN108671469A - A kind of body-building bench press frame with protective function - Google Patents

Abstract

The invention provides a body-building bench press frame with a protection function, and relates to the field of body-building equipment. The body-building bench press frame with the protection function comprises a backrest plate, wherein a supporting leg is fixedly connected to the bottom of the backrest plate, a relay device is fixedly connected to the right side of the backrest plate, a protection device is fixedly connected to the front side of the supporting leg, a transmission auxiliary device is arranged inside the protection device, a barbell rod is arranged above the backrest plate, and a barbell disc is movably inserted in the front of the protection device and on the outer surface of the barbell rod. This body-building is with bench press frame with protect function, when the connecting block that first dead lever surface set up and barbell bar contact, can exert oneself through the shank and to ascending effort of connecting block, the person of facilitating the use carries out the helping hand when bench press, has effectively prevented that the upper limbs strength is not enough to cause the barbell to drop and injure the user by a crashing object, not only can improve user's exercise effect, still has certain guard action.

Description

A kind of body-building bench press frame with protective function

technical field

The invention relates to the technical field of fitness equipment, in particular to a fitness bench press frame with a protective function.

Background technique

The bench press is a kind of upper body fitness equipment, and the most frequently used equipment in the gym is the flat bench press. The pectoral muscles only control the movement of the shoulder joint, pulling the upper arm from both sides to the chest, while the movement of the elbow joint is completed by the triceps, which makes the arm change from bending to straightening, so as to achieve the purpose of upper limb strength training .

The bench press racks currently used are generally separated from the barbell. When the user exercises the upper limbs, due to physical strength and muscular endurance, the barbell has a certain risk after being pushed. It may be caused by the error of the messenger. risk of injury, or even life-threatening.

Contents of the invention

(1) Solved technical problems

Aiming at the deficiencies of the prior art, the present invention provides a body-building bench press with protection function, which solves the problem that the currently used bench press is generally separated from the barbell, and the user is exercising the upper limbs. Sometimes, due to physical strength and muscular endurance, the barbell is dangerous after being pushed. It may cause injury or even life-threatening problems due to the error of the messenger.

(2) Technical solution

In order to achieve the above object, the present invention is achieved through the following technical solutions: a body-building bench press frame with protection function, comprising a backboard, the bottom of the backboard is fixedly connected with supporting legs, and the right side of the backboard is fixed A relay device is connected, the front of the support leg is fixedly connected with a protection device, the inside of the protection device is provided with a transmission auxiliary device, a barbell is provided above the backboard, and the outer surface of the barbell is located on the protective A barbell plate is movably inserted in the front of the device.

Preferably, the relay device includes a fixed block, a fixed screw rod, a fixed steel pipe, a first fixed groove, a connecting shaft, a second fixed groove, a first insertion pin, a spring, a second insertion pin, a connecting rod, and a round rod , a protective layer and a fixing ring, the right side of the backboard is in contact with the fixing block, the fixing screw rod is located on the right side of the fixing block, the threaded end of the fixing screw rod runs through the fixing block and is connected to the left side of the fixing block The backboard is threadedly connected, the right side of the fixed block is fixedly connected with the fixed steel pipe, the first fixed groove is opened on the inner wall of the fixed steel pipe, the connecting shaft is located inside the fixed steel pipe, and the inside of the fixed steel pipe is located at the connection The outer surface of the shaft is movably socketed with the spring, one end of the spring is fixedly connected with the first socket pin, and the end of the first socket pin away from the connecting shaft passes through the first fixing groove and extends to the inside of the first fixing groove , the second fixing groove is opened on the outer surface of the connecting shaft, the other end of the spring is fixedly connected to the second insertion pin, and the end of the second insertion pin away from the fixed steel pipe penetrates the second fixing groove and extends To the inside of the second fixing groove, the front of the connecting shaft runs through the fixed steel pipe and extends to the front of the fixed steel pipe. One end of the shaft is fixedly connected to the round rod, the outer surface of the round rod is fixedly connected to the protective layer, the outer surface of the connecting rod is fixedly connected to the fixed ring, and the spring and the connecting shaft arranged inside the steel pipe are fixed, and the two ends of the spring pass through The first plug-in pin and the second plug-in pin are plugged with the first fixed groove provided on the inner wall of the fixed steel pipe and the second fixed groove provided on the outer surface of the connecting shaft, so that the connecting rod can be easily rotated along the connecting shaft. Rebound, and the user's legs can be exercised by hooking the insteps on the backrest board with the body on the protective layer, so that the bench press frame can have the function of leg exercise, and the bench press frame can be exercised more comprehensively.

Preferably, the protective device includes a transmission box, a first supporting square tube, a second supporting square tube, a first chute and a second chute, the top of the transmission box is fixedly connected to the first supporting square tube, and the The top of the transmission box is fixedly connected with the second support square tube on the right side of the first support square tube. The first chute is opened on the right side of the first support square tube. Two supports on the left side of the square tube.

Preferably, the auxiliary transmission device includes a transmission rope, a first pulley, a second pulley, a third pulley, a first fixed rod, a first roller, a second fixed rod, a second roller and a connecting block, and the fixed ring The inner ring is fixedly connected to the transmission rope, the inner wall of the transmission box is fixedly connected to the first pulley, and the inner wall of the transmission box is fixedly connected to the second pulley on the left side of the first pulley, and the first support square tube is fixedly connected to the second pulley. The inner wall is fixedly connected with the third pulley, the first fixing rod is located inside the first supporting square tube, and the end of the first fixing rod away from the left side of the inner wall of the first supporting square tube runs through the first chute and the second chute And extend to the inside of the second support square tube, the end of the transmission rope away from the fixed ring runs through the transmission box, the first support square tube and is fixedly connected with the first fixed rod provided inside the first support square tube, the first The outer rings of the pulley, the second pulley and the third pulley are all overlapped with the transmission rope. There are two first rollers, and the two first rollers are respectively fixedly connected to the two ends of the first fixed rod. The outer surface of a fixed rod is fixedly connected with a second fixed rod under the first roller, and the end of the second fixed rod away from the first fixed rod is fixedly connected with a second roller. The outer surface of the first fixed rod And it is fixedly connected with the connecting block between the first supporting square tube and the second supporting square tube.

Preferably, the outer rings of the first roller and the second roller are both in rolling connection with the first supporting square tube and the second supporting square tube, and are respectively connected with the first supporting square tube and the second supporting square tube through the first roller and the second roller. The rolling connection of the square tube can make the movement of the lower part of the first fixed rod more flexible, effectively reduce the friction force, and make the power transmission of the transmission rope more efficient.

Preferably, the right side of the transmission box is provided with a through hole suitable for the transmission rope, the outer surface of the transmission rope is not in contact with the transmission box, the transmission rope is fixedly connected to the fixed ring, and the transmission rope passes through the first The pulley, the second pulley and the third pulley are fixed to the first fixed rod, and the two ends of the first fixed rod are connected to the first roller, and the first fixed rod is connected to the second roller through the second fixed rod. When the connecting rod is counterclockwise When rotating, it can drive the first fixed rod to move vertically up and down. When the connecting block set on the outer surface of the first fixed rod contacts the barbell, an upward force can be exerted on the connecting block by exerting force from the legs, which is convenient for the user to move in the lying position. Assisting when pushing can effectively prevent the barbell from falling and hurting the user due to insufficient strength of the upper limbs. It can not only improve the exercise effect of the user, but also has a certain protective effect.

Preferably, a locking device is provided inside the second supporting square tube, and the locking device includes a first rack, a transmission gear, a pin shaft, a ring, a movable groove, a clamping pin, a clamping tooth, a second Two racks, bearings and the first transmission rod, the right side of the inner wall of the second supporting square tube is fixedly connected with the first rack, the toothed end of the first rack is meshed with the transmission gear, and the transmission gear The front side is fixedly connected with the pin shaft, the left side of the inner wall of the second supporting square tube is fixedly connected with the second rack in front of the transmission gear, the inner ring of the ring is movably socketed on the outer surface of the pin shaft, and the pin shaft There is a gap between the shaft and the ring, which can make the pin shaft and the ring shake. The movable groove is set on the inner ring of the ring, and the clamping pin is fixedly connected with the outer surface of the pin shaft. The end of the tight pin away from the pin shaft passes through the movable groove and extends to the inside of the movable groove, and the outer ring of the ring is fixedly connected with the clamping teeth.

Preferably, the inside of the movable groove is adapted to the bayonet pin, and the inside of the movable groove is movably connected to the bayonet pin, and is movably connected to the bayonet pin through the movable groove. When the barbell moves up and down, the ring can be driven Rotate, when the barbell rises or falls too fast, due to the centrifugal force on the ring, the eccentric rotation of the ring and the pin shaft can make the tooth pattern of the clamping tooth and the second rack clamp the limit, effectively preventing the The barbell suddenly falls and hurts the user. When the barbell is pushed up, the barbell can be used normally.

Preferably, the barbell is located directly above the connecting block, the outer surface of the barbell is not in contact with the first supporting square tube and the second supporting square tube, and the outer surface of the pin is fixed in front of the ring A bearing is sleeved, the outer ring of the bearing is fixedly connected with the first transmission rod, the end of the first transmission rod away from the bearing passes through the second chute and is fixedly connected with the barbell, and the outer surface of the barbell is fixedly connected There is a second transmission rod, and the right side of the inner wall of the first support square tube is slidably connected with a slider. The block is fixedly connected, meshed with the transmission gear through the first rack, the front of the transmission gear is connected with the barbell through the pin shaft, the bearing and the first transmission rod, and the barbell is connected with the slider through the second transmission rod, when the user uses The barbell can move vertically along the first rack, which can make the user more stable during exercise, and the barbell is located between the first support square tube and the second support square tube, further increasing the vertical movement of the barbell Stability during the activity.

(3) Beneficial effects

1. The body-building bench press rack with protection function fixes the spring and the connecting shaft inside the steel pipe, and the two ends of the spring pass through the first socket pin and the second socket pin and the first fixing groove opened on the inner wall of the fixed steel pipe. It is inserted into the second fixing groove opened on the outer surface of the connecting shaft, so that the connecting rod can be easily rebounded when the connecting rod is rotated along the connecting shaft, and the body can be hooked on the protective layer by the body sitting on the backrest board. The legs can be exercised, so that the bench press can have the function of exercising the legs, and the exercise of the bench press can be more comprehensive.

2. The body-building bench press frame with protection function is respectively connected with the first support square tube and the second support square tube through the rolling connection of the first roller and the second roller, which can make the lower movement of the first fixed rod more flexible and effective. Reduced friction can make the power transmission of the drive rope more efficient.

3. The body-building bench press frame with protective function is fixed to the transmission rope fixedly connected on the fixing ring, and the transmission rope is fixed to the first fixed rod through the first pulley, the second pulley and the third pulley, and the first fixed rod Both ends are connected with the first roller, and the first fixed rod is connected with the second roller through the second fixed rod. When the connecting rod rotates counterclockwise, it can drive the first fixed rod to move vertically up and down. When the outer surface of the first fixed rod is set When the connection block is in contact with the barbell bar, the force exerted by the legs can exert an upward force on the connection block, which is convenient for the user to assist when bench-pressing, and effectively prevents the barbell from falling and hurting the user due to insufficient strength of the upper limbs. Improve the user's exercise effect, also has a certain protective effect.

4. The body-building bench press frame with protection function is connected with the locking pin through the movable groove. When the barbell moves up and down, it can drive the ring to rotate. When the barbell rises or falls too fast, due to the ring Under the centrifugal force, the eccentric rotation of the ring and the pin shaft can make the tooth pattern of the clamping tooth and the second rack clamp the limit, effectively preventing the barbell from falling suddenly and hurting the user. When the barbell is pushed up When the barbell bar can be used normally.

5. The body-building bench press rack with protection function meshes with the transmission gear through the first rack, the front of the transmission gear is connected to the barbell bar through the pin shaft, the bearing and the first transmission rod, and the barbell bar passes through the second transmission rod Connected with the slider, the user can make the barbell move vertically along the first rack when using it, which can make the user more stable during exercise, and the barbell is located between the first support square tube and the second support square tube The space further increases the stability of the barbell in the process of moving up and down.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural sectional view of the relay device of the present invention;

Fig. 3 is a partial enlarged view of the structure of the present invention;

Fig. 4 is a partial sectional view of the structure of the present invention.

Among them, 1 backboard, 2 supporting legs, 3 relay device, 301 fixed block, 302 fixed screw rod, 303 fixed steel pipe, 304 first fixed groove, 305 connecting shaft, 306 second fixed groove, 307 first plug pin, 308 spring, 309 second socket pin, 310 connecting rod, 311 round rod, 312 protective layer, 313 fixed ring, 4 transmission auxiliary device, 401 transmission rope, 402 first pulley, 403 second pulley, 404 third pulley, 405 the first fixed rod, 406 the first roller, 407 the second fixed rod, 408 the second roller, 409 connecting block, 5 protection device, 501 transmission box, 502 the first supporting square tube, 503 the second supporting square tube, 504 the first One chute, 505 second chute, 6 barbell bar, 7 second transmission rod, 8 slider, 9 locking device, 901 first rack, 902 transmission gear, 903 pin shaft, 904 ring, 905 movable slot , 906 locking pin, 907 locking teeth, 908 second rack, 909 bearing, 910 first transmission rod, 10 barbell plates.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figures 1-4, the embodiment of the present invention provides a body-building bench press frame with a protective function, including a backboard 1, the bottom of the backboard 1 is fixedly connected with a support leg 2, and the right side of the backboard 1 is fixedly connected There is a relay device 3, a protective device 5 is fixedly connected to the front of the supporting leg 2, a transmission auxiliary device 4 is arranged inside the protective device 5, a barbell bar 6 is arranged above the backboard 1, and the outer surface of the barbell bar 6 is located on the outer surface of the protective device. The front of 5 is movably inserted with barbell plate 10.

The relay device 3 includes a fixed block 301, a fixed screw rod 302, a fixed steel pipe 303, a first fixed groove 304, a connecting shaft 305, a second fixed groove 306, a first insertion pin 307, a spring 308, a second insertion pin 309, Connecting rod 310, round rod 311, protective layer 312 and fixing ring 313, the right side of backboard 1 is in contact with fixing block 301, fixing screw rod 302 is positioned at the right side of fixing block 301, and the threaded end of fixing screw rod 302 runs through fixing block 301 and is threadedly connected with the backboard 1 provided on the left side of the fixed block 301, the right side of the fixed block 301 is fixedly connected with the fixed steel pipe 303, the first fixed groove 304 is opened on the inner wall of the fixed steel pipe 303, and the connecting shaft 305 is located at the fixed steel pipe 303 Inside, the inside of the fixed steel pipe 303 and the outer surface of the connecting shaft 305 are movably socketed with the spring 308, and one end of the spring 308 is fixedly connected with the first plug pin 307, and the end of the first plug pin 307 away from the connecting shaft 305 runs through the second A fixed groove 304 extends to the inside of the first fixed groove 304, the second fixed groove 306 is opened on the outer surface of the connecting shaft 305, the other end of the spring 308 is fixedly connected with the second plug pin 309, the second plug pin 309 The end away from the fixed steel pipe 303 runs through the second fixed groove 306 and extends to the inside of the second fixed groove 306, the front of the connecting shaft 305 runs through the fixed steel pipe 303 and extends to the front of the fixed steel pipe 303, the outside of the fixed steel pipe 303 is located at the connection The outer surface of the shaft 305 is fixedly connected to the connecting rod 310, the end of the connecting rod 310 away from the connecting shaft 305 is fixedly connected to the round rod 311, the outer surface of the round rod 311 is fixedly connected to the protective layer 312, and the outer surface of the connecting rod 310 is connected to the fixed ring 313 Fixed connection.

The protection device 5 includes a transmission box 501, a first support square tube 502, a second support square tube 503, a first chute 504 and a second chute 505, the top of the transmission box 501 is fixedly connected with the first support square tube 502, and the transmission The top of box 501 is fixedly connected with the second support square pipe 503 on the right side of the first support square pipe 502, and the first chute 504 is offered on the right side of the first support square pipe 502, and the second chute 505 is opened on the right side of the first support square pipe 502. The left side of the second support square tube 503 .

The auxiliary transmission device 4 includes a transmission rope 401, a first pulley 402, a second pulley 403, a third pulley 404, a first fixed rod 405, a first roller 406, a second fixed rod 407, a second roller 408 and a connecting block 409, The inner circle of the fixed ring 313 is fixedly connected with the transmission rope 401, the inner wall of the transmission box 501 is fixedly connected with the first pulley 402, and the inner wall of the transmission box 501 is fixedly connected with the second pulley 403 on the left side of the first pulley 402, the first The inner wall of the support square tube 502 is fixedly connected with the third pulley 404, the first fixed rod 405 is located inside the first support square tube 502, and the end of the first fixed rod 405 away from the left side of the first support square tube 502 inner wall runs through the first pulley. Groove 504, the second chute 505 and extend to the inside of the second support square pipe 503, the end of transmission rope 401 away from the fixed ring 313 runs through the transmission case 501, the first support square pipe 502 and is arranged inside the first support square pipe 502 The first fixed rod 405 of the transmission box 501 is fixedly connected, and the right side of the transmission box 501 is provided with a through hole suitable for the transmission rope 401. The outer surface of the transmission rope 401 is not in contact with the transmission box 501. The first pulley 402, the second pulley 403 and the outer ring of the third pulley 404 are all overlapped with the transmission rope 401, the quantity of the first roller 406 has two, and the two first rollers 406 are fixedly connected with the two ends of the first fixed rod 405 respectively, and the first fixed rod 405 The outer surface of the first roller 406 is fixedly connected with a second fixed rod 407, and one end of the second fixed rod 407 away from the first fixed rod 405 is fixedly connected with a second roller 408, the first roller 406 and the second roller 408 The outer rings of the first support square tube 502 and the second support square tube 503 are rollingly connected, and the outer surface of the first fixed rod 405 is fixedly connected between the first support square tube 502 and the second support square tube 503. Block 409.

The inside of the second support square tube 503 is provided with a locking device 9, and the locking device 9 includes a first rack 901, a transmission gear 902, a pin shaft 903, a ring 904, a movable groove 905, a locking pin 906, and a locking tooth. 907, the second rack 908, the bearing 909 and the first transmission rod 910, the right side of the inner wall of the second support square tube 503 is fixedly connected with the first rack 901, and the toothed end of the first rack 901 meshes with the transmission gear 902 , the front of the transmission gear 902 is fixedly connected with the pin shaft 903, the left side of the inner wall of the second support square tube 503 and located in front of the transmission gear 902 is fixedly connected with the second rack 908, and the inner ring of the ring 904 is movably socketed on the pin On the outer surface of the shaft 903, the movable groove 905 is provided on the inner ring of the ring 904, and the clamping pin 906 is fixedly connected with the outer surface of the pin shaft 903, and the end of the clamping pin 906 away from the pin shaft 903 runs through the movable groove 905 and extends to Inside the movable groove 905, the inside of the movable groove 905 is adapted to the clamping pin 905, the inside of the movable groove 905 is movably connected with the clamping pin 906, and the outer ring of the ring 904 is fixedly connected with the clamping teeth 907.

The barbell bar 6 is located directly above the connecting block 409, the outer surface of the barbell bar 6 is not in contact with the first support square tube 502 and the second support square tube 503, and the outer surface of the pin shaft 903 is fixedly socketed in front of the ring 904 There is a bearing 909, the outer ring of the bearing 909 is fixedly connected with the first transmission rod 910, the end of the first transmission rod 910 away from the bearing 909 runs through the second chute 505 and is fixedly connected with the barbell 6, and the outer surface of the barbell 6 is fixedly connected There is a second transmission rod 7, the right side of the inner wall of the first support square tube 502 is slidably connected with a slider 8, and the end of the second transmission rod 7 away from the barbell 6 runs through the first chute 504 and is connected to the inside of the first support square tube 502. The set of sliders 8 is fixedly connected.

Working principle: by fixing the spring 308 and the connecting shaft 305 inside the steel pipe 303, the two ends of the spring 308 are connected with the first fixing groove 304 opened on the inner wall of the fixed steel pipe 303 through the first insertion pin 307 and the second insertion pin 309 The second fixing groove 306 provided on the outer surface of the shaft 305 is plugged in, so that the connecting rod 310 can be easily rebounded when the connecting rod 310 rotates along the connecting shaft 305, and the upper foot surface of the body sits on the backboard 1 to hook on the protective layer 312 The user's legs can be exercised, the bench press frame can have the function of exercising the legs, and the bench press frame can be exercised more comprehensively. Through the transmission rope 401 fixedly connected on the fixing ring 313, the transmission rope 401 passes through the first The pulley 402, the second pulley 403 and the third pulley 404 are fixed with the first fixed rod 405, and the two ends of the first fixed rod 405 are connected with the first roller 406, and the first fixed rod 405 is connected with the second fixed rod 407 by the second fixed rod 407. The roller 408 is connected, and when the connecting rod 310 rotates counterclockwise, it can drive the first fixed rod 405 to move up and down vertically. An upward force on the connecting block 409 is convenient for the user to assist when bench-pressing, and effectively prevents the barbell from falling and hurting the user due to insufficient strength of the upper limbs. 6 can drive the ring 904 to rotate when it moves up and down. When the barbell 6 rises or falls too fast, the ring 904 and the pin shaft 903 can rotate eccentrically due to the centrifugal force on the barbell 6, so that the teeth of the clamping teeth 907 can be rotated eccentrically. The clamping limit of the rib and the second rack 908 effectively prevents the barbell 6 from falling suddenly and injuring the user. The first rack 901 meshes with the transmission gear 902, and the front of the transmission gear 902 passes through the pin shaft 903 and the bearing. 909 and the first transmission rod 910 are connected with the barbell bar 6, and the barbell bar 6 is connected with the slider 8 through the second transmission rod 7, and the user can make the barbell bar 6 move vertically along the first rack 901 when using it. The user is more stable during the exercise, and the barbell 6 is located between the first support square tube 502 and the second support square tube 503 , which further increases the stability of the barbell 6 in the process of moving up and down.

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

Claims (9)

1. a kind of body-building flat bench with defencive function, including backboard (1), it is characterised in that：The backboard (1) Bottom is fixedly connected with support leg (2), and relay apparatus (3), the support leg are fixedly connected on the right side of the backboard (1) (2) front is fixedly connected with protective device (5), and the protective device (5) is internally provided with drive aid (4), institute It states and is provided with barbell bar (6) above backboard (1), the outer surface of the barbell bar (6) and the front positioned at protective device (5) Activity is plugged with disc (10).

2. a kind of body-building flat bench with defencive function according to claim 1, it is characterised in that：The relay dress It includes fixed block (301), fixed screw bar (302), fixed steel pipe (303), the first fixing groove (304), connecting shaft to set (3) (305), the second fixing groove (306), the first grafting pin (307), spring (308), the second grafting pin (309), connecting rod (310), The right side of round bar (311), protective layer (312) and fixed ring (313), the backboard (1) is contacted with fixed block (301), described Fixed screw bar (302) is located at the right side of fixed block (301), and the end of thread of the fixed screw bar (302) runs through fixed block (301) and with the backboard (1) being arranged on the left of fixed block (301) it is threadedly coupled, the right side of the fixed block (301) and fixed steel Pipe (303) is fixedly connected, and first fixing groove (304) is opened in the inner wall of fixed steel pipe (303), the connecting shaft (305) Positioned at the inside of fixed steel pipe (303), the inside of the fixed steel pipe (303) and positioned at the outer surface of connecting shaft (305) and bullet Spring (308) pivot bush unit, one end of the spring (308) are fixedly connected with the first grafting pin (307), the first grafting pin (307) one end far from connecting shaft (305) runs through the first fixing groove (304) and extends to the inside of the first fixing groove (304), institute State the outer surface that the second fixing groove (306) is opened in connecting shaft (305), the other end and the second grafting pin of the spring (308) (309) it is fixedly connected, the second fixing groove (306) is run through in one end far from fixed steel pipe (303) of the second grafting pin (309) And the inside of the second fixing groove (306) is extended to, the front of the connecting shaft (305) is run through fixed steel pipe (303) and is extended to The front of fixed steel pipe (303), the outside of the fixed steel pipe (303) and outer surface and the connecting rod for being located at connecting shaft (305) (310) it is fixedly connected, the one end of the connecting rod (310) far from connecting shaft (305) is fixedly connected with round bar (311), the circle The outer surface of bar (311) is fixedly connected with protective layer (312), connecting rod (310) outer surface and the fixed company of fixed ring (313) It connects.

3. a kind of body-building flat bench with defencive function according to claim 1, it is characterised in that：The protection dress It includes transmission case (501), the first supporting square tube (502), the second supporting square tube (503), the first sliding groove (504) and second to set (5) The top of sliding slot (505), the transmission case (501) is fixedly connected with the first supporting square tube (502), the transmission case (501) Top is simultaneously fixedly connected positioned at the right side of the first supporting square tube (502) with the second supporting square tube (503), the first sliding groove (504) it is opened in the right side of the first supporting square tube (502), the second sliding slot (505) is opened in the second supporting square tube (503) Left side.

4. a kind of body-building flat bench with defencive function according to claim 3, it is characterised in that：The transmission is auxiliary It includes transmission rope (401), first pulley (402), second pulley (403), third pulley (404), the first fixed link to help device (4) (405), the first idler wheel (406), the second fixed link (407), the second idler wheel (408) and link block (409), the fixed ring (313) inner ring is fixedly connected with transmission rope (401), inner wall and the fixed company of first pulley (402) of the transmission case (501) It connects, the inner wall of the transmission case (501) is simultaneously fixedly connected positioned at the left side of first pulley (402) with second pulley (403), described The inner wall of first supporting square tube (502) is fixedly connected with third pulley (404), and first fixed link (405) is located at first The inside of square tube (502) is supportted, first fixed link (405) is run through far from one end on the left of the first supporting square tube (502) inner wall The first sliding groove (504), second sliding slot (505) and the inside for extending to the second supporting square tube (503), the transmission rope (401) are remote One end from fixed ring (313) through transmission case (501), the first supporting square tube (502) and with the first supporting square tube (502) it is internal The first fixed link (405) being arranged is fixedly connected, the first pulley (402), second pulley (403) and third pulley (404) Outer ring overlapped with transmission rope (401), there are two the quantity of first idler wheel (406), and two the first idler wheels (406) are respectively It is fixedly connected with the both ends of the first fixed link (405), the outer surface of first fixed link (405) is simultaneously located at the first idler wheel (406) the second fixed link (407) is fixedly connected with below, separate first fixed link (405) of second fixed link (407) One end is fixedly connected with the second idler wheel (408), and the outer surface of first fixed link (405) is simultaneously located at the first supporting square tube (502) link block (409) is fixedly connected between the second supporting square tube (503).

5. a kind of body-building flat bench with defencive function according to claim 4, it is characterised in that：First rolling The outer ring for taking turns (406) and the second idler wheel (408) rolls connection with the first supporting square tube (502) and the second supporting square tube (503).

6. a kind of body-building flat bench with defencive function according to claim 4, it is characterised in that：The transmission case (501) right side opening is equipped with transmission rope (401) compatible through-hole, the outer surface of the transmission rope (401) and transmission case (501) it does not contact.

7. a kind of body-building flat bench with defencive function according to claim 4, it is characterised in that：Described second Support square tube (503) is internally provided with locking device (9), and the locking device (9) includes the first rack (901), transmission gear (902), axis pin (903), annulus (904), loose slot (905), clamping pin (906), clamping teeth (907), the second rack (908), Bearing (909) and the first drive link (910), the inner wall right side of second supporting square tube (503) and the first rack (901) are fixed Connection, the groove end of first rack (901) are engaged with transmission gear (902), the front of the transmission gear (902) and pin Axis (903) is fixedly connected, the front on the left of the inner wall of second supporting square tube (503) and positioned at transmission gear (902) and the Two racks (908) are fixedly connected, and the inner ring of the annulus (904) is actively socketed on the outer surface of axis pin (903), the loose slot (905) the inner ring for being opened in annulus (904), the clamping pin (906) is fixedly connected with the outer surface of axis pin (903), described The one end of clamping pin (906) far from axis pin (903) runs through loose slot (905) and extends to the inside of loose slot (905), the circle The outer ring of ring (904) is fixedly connected with clamping teeth (907).

8. a kind of body-building flat bench with defencive function according to claim 7, it is characterised in that：The loose slot (905) inside is adapted with clamping pin (905), and the inside of the loose slot (905) is flexibly connected with clamping pin (906).

9. a kind of body-building flat bench with defencive function according to claim 4, it is characterised in that：The barbell bar (6) it is located at the surface of link block (409), outer surface and the first supporting square tube (502) and the second support of the barbell bar (6) Square tube (503) does not contact, and the outer surface of the axis pin (903) is simultaneously connected to bearing positioned at the front fixing sleeve of annulus (904) (909), the outer ring of the bearing (909) is fixedly connected with the first drive link (910), and first drive link (910) is far from axis The one end of (909) is held through second sliding slot (505) and is fixedly connected with barbell bar (6), the outer surface of the barbell bar (6) is fixed It is connected with the second drive link (7), slidably connects sliding block (8) on the right side of the inner wall of first supporting square tube (502), described second What the one end of drive link (7) far from barbell bar (6) was arranged through the first sliding groove (504) and with the first supporting square tube (502) inside Sliding block (8) is fixedly connected.