CN221867253U - An extended structure and training system of a dumbbell bench - Google Patents

Abstract

The present application discloses an extended structure and training system of a dumbbell bench. The extended structure of the dumbbell bench comprises: a bench body, a rear support tube weldment arranged at the rear end of the bench body, a front support tube weldment arranged at the front end of the bench body, a seat support tube arranged on the front support tube weldment, a seat cushion tube connected to the seat support tube, a seat cushion arranged on the seat cushion tube, a back cushion tube arranged on the bench body, a back cushion support tube connected to the back cushion tube, a back cushion arranged on the back cushion tube, the back cushion tube is movably connected to the bench body, a rotating arm tube is movably connected to the back cushion tube, and at least one pull rope is arranged between the back cushion tube and the rotating arm tube. The present application solves the technical problem that the pull rope of the dumbbell bench is fixed at the bottom, the user can only pull the pull rope from the bottom to the top, and the movement method is relatively single.

Description

An extended structure and training system of a dumbbell bench

Technical Field

The present application relates to the field of fitness equipment, and in particular to an extended structure of a dumbbell bench and a training system.

Background Art

In the prior art with publication number CN214105713U, a multifunctional dumbbell bench is disclosed, including a seat cushion, a backrest and a support frame, the seat cushion and the backrest are both installed on the support frame, the support frame includes a front support frame and a rear support frame, the front support frame is connected to the rear support frame, the seat cushion is arranged above the front support frame, the backrest is arranged above the rear support frame, the front support frame is provided with a foot hook tube, and the rear support frame is provided with a tension rope.

As can be seen from the above, a foot hook tube is designed on the front support frame, and a tension rope is designed on the rear support frame, which increases the use function of the dumbbell bench and is conducive to users to perform various types of physical exercises. By designing the front support rod and the rear support rod to be relatively rotatable and foldable, the multifunctional dumbbell bench has a folding function. When not in use, it can reduce the space occupied by the multifunctional dumbbell bench and is easy to store and keep. The hook can ensure the safety of the dumbbell bench. The folding seat lifts the limit slide bar to facilitate quick folding. However, when the user uses the device, the tension rope is fixed at the bottom, and the user can only pull the tension rope from bottom to top, and the exercise method is relatively single.

With regard to the problem in the related art that the pull rope of the dumbbell bench is fixed at the bottom, the user can only pull the pull rope from the bottom to the top, and the exercise method is relatively single, no effective solution has been proposed yet.

Summary of the invention

The main purpose of the present application is to provide an extended structure of a dumbbell bench to solve the problem that the pull rope of the dumbbell bench is fixed at the bottom and the user can only pull the pull rope from bottom to top, resulting in a relatively single exercise method.

In order to achieve the above objectives, according to one aspect of the present application, an expansion structure of a dumbbell bench is provided.

According to the extended structure of the dumbbell bench of the present application, the dumbbell bench includes: a bench main body, a rear support tube weldment arranged at the rear end of the bench main body, a front support tube weldment arranged at the front end of the bench main body, a seat cushion support tube arranged on the front support tube weldment, a seat cushion tube connected to the seat cushion support tube, a seat cushion arranged on the seat cushion tube, a back cushion tube arranged on the bench main body, a back cushion support tube connected to the back cushion tube, a back cushion arranged on the back cushion tube, the back cushion tube is movably connected to the bench main body, a rotating arm tube movably connected to the back cushion tube, and at least one pull rope is arranged between the back cushion tube and the rotating arm tube.

Furthermore, the stool body also includes: a rear leg tube is arranged on the rear support tube welding part, a front leg tube is arranged on the front support tube welding part, and a transport wheel is installed on each side of the front leg tube.

Furthermore, a rotating arm tube fixing piece is provided at the upper end of the cushion tube for fixing the rotating arm tube. The rotating arm tube is connected to an elastic pull rope via a nylon pull rope, and the elastic pull rope passes through a pulley fixing piece and is connected to the rear leg tube.

Furthermore, there are four elastic pull ropes, and gourd hooks are provided at both ends of the elastic pull ropes. Every two elastic pull ropes are respectively arranged on both sides of the rear support tube welding part, and stretching hooks are respectively provided at both ends of the rear leg tube. The gourd hooks on every two elastic pull ropes pass through the stretching hooks and are fixed on the rear leg tube.

Furthermore, a large pulley is arranged on the pulley fixing member, and a large pulley limiting plate is arranged at the bottom end of the large pulley.

Furthermore, a plurality of baffles are provided on the rear support tube welding part for supporting the back cushion support tube, and a plurality of baffles are provided on the front support tube welding part for supporting the seat cushion support tube.

Furthermore, the hoist hook at the top of the elastic pull rope is connected to a pull ring, and the pull ring is connected to a nylon pull rope. The top of the nylon pull rope passes through the inside of the rotating arm tube and is connected to a pull handle via a small pulley. The small pulley is fixed to the outer end of the rotating arm tube using a rotating pulley seat. A limiting ball is arranged between the pull handle and the nylon pull rope, and a limiting ball head pin is arranged on the rotating arm tube.

Furthermore, a foam tube welding part is arranged on the front support tube welding part, the foam tube welding part is T-shaped, and a hook-foot foam is arranged on it, and a sponge body is arranged on the seat cushion and the back cushion.

Furthermore, a foam tube fixing seat is also provided on the front support tube welding piece, a ring-belt pin is provided on the foam tube fixing seat, and the foam tube welding piece is installed on the foam tube fixing seat via the ring-belt pin.

In order to achieve the above objective, according to another aspect of the present application, a dumbbell bench training system is provided.

The dumbbell bench training system according to the present application includes: an extended structure of any one of the above-mentioned dumbbell benches.

In the embodiment of the present application, an adjustable rotating arm and an elastic pull rope structure are added to the dumbbell bench. The dumbbell bench includes: a bench body, a rear support tube welded piece arranged at the rear end of the bench body, a front support tube welded piece arranged at the front end of the bench body, a seat cushion support tube is arranged on the front support tube welded piece, a seat cushion tube connected to the seat cushion support tube, a seat cushion is arranged on the seat cushion tube, a back cushion tube is arranged on the bench body, a back cushion support tube connected to the back cushion tube, a back cushion is arranged on the back cushion tube, and the back cushion tube is movably connected to the On the stool body, the cushion tube is movably connected to a rotating arm tube, and at least one pull rope is provided between the cushion tube and the rotating arm tube, so that when the user uses the dumbbell stool, the user can either sit vertically on the device or lie flat on the device, and hold the handles with both hands to pull the pull rope from the horizontal direction to the vertical direction, thereby achieving the technical effect that when the user uses the dumbbell stool, the user can pull the pull rope from multiple directions, thereby solving the technical problem that the pull rope of the dumbbell stool is fixed at the bottom, the user can only pull the pull rope from the bottom to the top, and the movement method is relatively single.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

FIG1 is a schematic structural diagram of an extended structure of a dumbbell bench according to an embodiment of the present application;

FIG2 is a schematic diagram of the rotation of the rotating arm tube of the extended structure of the dumbbell bench according to an embodiment of the present application;

FIG3 is a schematic diagram of the rotation of the cushion of the extended structure of the dumbbell bench according to an embodiment of the present application;

FIG4 is a first schematic diagram of a movement mode of the extended structure of the dumbbell bench according to an embodiment of the present application;

FIG. 5 is a second schematic diagram of the movement mode of the extended structure of the dumbbell bench according to an embodiment of the present application.

Reference numerals

1. Rear support tube welding parts; 2. Front support tube welding parts; 3-1. Front foot tube; 3-2. Transport wheel; 4-1. Rear foot tube; 4-2. Stretch hook; 5. Seat tube; 6. Seat support tube; 7. Back cushion tube; 8. Back cushion support tube; 9. Pulley fixing parts; 10. Rotating arm tube fixing parts; 11. Rotating arm tube; 12. Seat; 13. Back cushion; 14. Elastic pull rope; 15. Hoist hook; 16. Large pulley; 17. Large pulley limit plate; 18. Nylon pull rope; 19. Pull ring; 20-1. Small pulley; 20-2. Limit ball head pin; 21. Rotating pulley seat; 22. Limit ball; 23. Pull handle; 24-1. Hook foot foam; 24-2. Foam tube welding parts; 24-3. Ring pin; 24-4. Foam tube fixing seat.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

As shown in Figures 1-5, the present application relates to an extended structure of a dumbbell bench, which includes: a bench main body, a rear support tube weldment 1 arranged at the rear end of the bench main body, a front support tube weldment 2 arranged at the front end of the bench main body, a seat cushion support tube 6 is arranged on the front support tube weldment 2, a seat cushion tube 5 connected to the seat cushion support tube 6, a seat cushion 12 is arranged on the seat cushion tube 5, a cushion tube 7 is arranged on the bench main body, a cushion support tube 8 connected to the cushion tube 7, a cushion 13 is arranged on the cushion tube 7, the cushion tube 7 is movably connected to the bench main body, a rotating arm tube 11 is movably connected to the cushion tube 7, and at least one pull rope is arranged between the cushion tube 7 and the rotating arm tube 11.

Specifically, in the present embodiment, the rear support tube weldment 1 at the rear end of the dumbbell bench and the front support tube weldment 2 at the front end are the main supporting components of the device, which are made of solid metal steel pipe material, are not easy to deform and damage, and ensure the stability and safety of the device, a seat cushion support tube 6 is arranged on the front support tube weldment 2, for supporting the seat cushion tube 5, the seat cushion tube 5 is H-shaped, and is laid flat on the seat cushion support tube 6, a seat cushion 12 is laid on the seat cushion tube 5, and the user sits on the seat cushion 12 to complete fitness movements, a back cushion tube 7 is movably connected between the rear support tube weldment 1 and the front support tube weldment 2, the bottom end of the back cushion tube 7 is movably connected to the rear support tube weldment 1, and the back cushion support tube 8 is movably installed between the back cushion tube 7 and the rear support tube weldment 1, and its top end is movably connected to the back cushion tube 7, and the other end can be lifted up to adjust the angle of the back cushion tube 7, and a back cushion 13 is installed on the back cushion tube 7, when the user uses the device, the buttocks sit on the seat cushion 12, and the back leans on the back cushion 13, The pull handle 23 is held by both hands, and the pull handle 23 is connected to the nylon pull rope 18, and the nylon pull rope 18 provides tension under the action of the elastic pull rope 14; in this embodiment, when the user needs to adjust the exercise angle, the rotating arm tube 11 can adjust the angle under the action of the rotating arm tube fixing part 10, so that the height of the rotating arm tube 11 will be different, and the height of the pull handle 23 will be different, which can be adjusted according to the needs of the user; when the user needs to adjust the sitting posture or the angle of the user's upper limbs when sitting on the seat cushion 12, the cushion support tube 8 can be movably connected, and the angle of the cushion 13 can be adjusted by adjusting the angle of the cushion support tube 8. In this way, the user can not only pull the pull rope from the horizontal direction, but also from the vertical direction. The user can sit vertically on the device or lie flat on the device, hold the handle with both hands, and pull the pull rope from the horizontal direction to the vertical direction, which can better exercise the upper limb muscle groups, and at the same time, the user can also achieve the effect of pulling the pull rope from multiple directions.

From the above description, it can be seen that the present application achieves the following technical effects:

In the embodiment of the present application, an adjustable rotating arm and an elastic pull rope 14 are added to the dumbbell bench. The dumbbell bench includes: a bench body, a rear support tube weldment 1 arranged at the rear end of the bench body, a front support tube weldment 2 arranged at the front end of the bench body, a seat cushion support tube 6 is arranged on the front support tube weldment 2, a seat cushion tube 5 connected to the seat cushion support tube 6, a seat cushion 12 is arranged on the seat cushion tube 5, a cushion tube 7 is arranged on the bench body, a cushion support tube 8 connected to the cushion tube 7, a cushion 13 is arranged on the cushion tube 7, and the cushion tube 7 is movable The back cushion tube 7 is movably connected to the bench body, and a rotating arm tube 11 is movably connected to the back cushion tube 7. At least one pull rope is arranged between the back cushion tube 7 and the rotating arm tube 11. When a user uses the dumbbell bench, the user can sit vertically on the device or lie flat on the device, and hold the handles with both hands to pull the pull rope from the horizontal direction to the vertical direction. The technical effect that the user can pull the pull rope from multiple directions when using the dumbbell bench is achieved, thereby solving the technical problem that the pull rope of the dumbbell bench is fixed at the bottom, the user can only pull the pull rope from the bottom to the top, and the movement method is relatively single.

Preferably, the stool body further comprises: a rear leg tube 4-1 is arranged on the rear support tube weldment 1, a front leg tube 3-1 is arranged on the front support tube weldment 2, and a transport wheel 3-2 is installed on each side of the front leg tube 3-1. A rear foot tube 4-1 is installed at the top of the rear support tube welding piece 1, and the top of the rear support tube welding piece 1 is fixed in the middle position of the rear foot tube 4-1. The rear foot tube 4-1 is in direct contact with the ground. Foot covers are installed at both ends of the rear foot tube 4-1 to achieve the effects of anti-slip and height adjustment and to keep the front and rear foot tubes in contact with the ground to ensure overall stability. The front foot tube 3-1 is installed at the top of the front support tube welding piece 2, and the front support tube welding piece 2 is fixed in the middle of the front foot tube 3-1. The dumbbell bench is mainly in contact with the ground by the front foot tube 3-1 and the rear foot tube 4-1, and is used to fix the dumbbell bench. Transport wheels 3-2 are respectively installed at both ends of the front foot tube 3-1. When the dumbbell bench needs to be moved, the dumbbell bench is lifted from the rear foot tube 4-1. At this time, only the transport wheels 3-2 are in contact with the ground. The dumbbell bench is pushed and can be moved to the position where the user wants to place it under the action of the transport wheels 3-2.

Preferably, the upper end of the cushion tube 7 is provided with a rotating arm tube fixing part 10 for fixing the rotating arm tube 11, and the rotating arm tube 11 is connected to an elastic pull rope 14 through a nylon pull rope 18, and the elastic pull rope 14 passes through a pulley fixing part 9 and is connected to the rear leg tube 4-1. The cushion 13 is connected to a pulley fixing part 9 at the lower end of the cushion tube 7, and the upper end of the cushion tube 7 is provided with a rotating arm tube fixing part 10 for fixing the rotating arm tube 11 and adjusting the angle of the rotating arm tube 11. The rotating arm tube 11 is two hollow steel tubes on the left and right, and the top tube thereof is connected to a nylon pull rope 18, and the nylon pull rope 18 is connected to the elastic pull rope 14, and the elastic pull rope 14 is used to increase the tension of the device, and the bottom end of the elastic pull rope 14 passes through the pulley fixing part 9 and is connected to the rear leg tube 4-1;

Preferably, there are four elastic pull ropes 14, and hoist hooks 15 are provided at both ends of the elastic pull ropes 14. Every two elastic pull ropes 14 are respectively provided on both sides of the rear support tube welding member 1, and stretching hooks 4-2 are respectively provided at both ends of the rear foot tube 4-1. The hoist hooks 15 on every two elastic pull ropes 14 pass through the stretching hooks 4-2 and are fixed on the rear foot tube 4-1. Every two elastic pull ropes 14 form a group, which are respectively provided on the left and right sides of the rear support tube welding member 1, and hoist hooks 15 are provided at both ends of each elastic pull rope 14. The hoist hooks 15 pass through the stretching hooks 4-2 on the left and right sides of the rear foot tube 4-1. Two elastic pull ropes 14 form a group, which are installed on the left and right sides of the rear support tube welding member 1, which not only increases the pulling force, but also shares the tension on the elastic pull ropes 14, thereby avoiding the elastic pull ropes 14 from breaking due to excessive tension, thereby improving safety.

Preferably, a large pulley 16 is provided on the pulley fixing member 9, and a large pulley limiting piece 17 is provided at the bottom end of the large pulley 16. The pulley fixing member 9 is used to fix the large pulley 16, and the elastic pull rope 14 is not only neat and stable under the action of the large pulley 16, but also makes the elastic pull rope 14 slide more smoothly. A large pulley limiting piece 17 is provided at the bottom end of the large pulley 16 to limit the position of the elastic pull rope 14.

Preferably, the rear support tube weldment 1 is provided with a plurality of baffles for supporting the back cushion support tube 8, and the front support tube weldment 2 is provided with a plurality of baffles for supporting the seat cushion support tube 6. When the user needs to adjust the angle of the seat cushion 12, the top end of the seat cushion support tube 6 is movably connected with the seat cushion tube 5, and the bottom end of the seat cushion support tube 6 can be respectively engaged with the bottom ends of the plurality of baffles on the front support tube weldment 2 according to the user's needs, so as to adjust the angle of the seat cushion 12; when the user needs to adjust the angle of the back cushion 13, the top end of the back cushion support tube 8 is movably connected with the back cushion tube 7, and the bottom end of the back cushion support tube 8 can be respectively engaged with the bottom ends of the plurality of baffles on the rear support tube weldment 1 according to the user's needs, so as to adjust the angle of the back cushion 13.

Preferably, the hoist hook 15 at the top of the elastic pull rope 14 is connected to a pull ring 19, and a nylon pull rope 18 is connected to the pull ring 19. The top of the nylon pull rope 18 passes through the interior of the rotating arm tube 11 and is connected to a handle 23 through a small pulley 20-1. The small pulley 20-1 is fixed to the outer end of the rotating arm tube 11 using a rotating pulley seat 21. A limiting ball 22 is arranged between the handle 23 and the nylon pull rope 18, and a limiting ball head pin 20-2 is arranged on the rotating arm tube 11. The pull ring 19 is used to connect the hoist hook 15, and the top of the pull ring 19 is connected to the nylon pull rope 18. Under the action of the small pulley 20-1, the nylon pull rope 18 can change the angle and reduce the friction, thereby improving the service life of the nylon pull rope 18. The nylon pull rope 18 passes through the openings at both ends, and the hollow rotating arm tube 11 in the middle is connected to the handle 23. When using this dumbbell bench, the user pulls the handle 23 with both hands, and pulls the elastic pull rope 14 under the connection action of the nylon pull rope 18 to achieve the effect of exercise; in this embodiment, a limiting ball 22 is arranged between the handle 23 and the nylon pull rope 18, and the limiting ball 22 is used to limit the position of the handle 23, and the limiting ball head pin 20-2 is fixed on the rotating arm tube fixing member 10, and the rotating arm tube fixing member 10 is provided with a plurality of hole positions. According to user needs, the limiting ball head pin 20-2 can be inserted into the hole positions on the rotating arm tube fixing member 10 to achieve the purpose of adjusting the rotating arm tube 11 and rotating different angles.

Preferably, a foam tube welding part 24-2 is provided on the front support tube welding part 2, and the foam tube welding part 24-2 is T-shaped, and a foot hook foam 24-1 is provided thereon, and a sponge is provided on the seat cushion 12 and the back cushion 13. The foam tube welding part 24-2 is T-shaped, and its bottom end is welded on the front support tube welding part 2, and a foot hook foam 24-1 is installed thereon. When using the dumbbell bench, the user can hook his feet on the foam tube welding part 24-2 to achieve the effect of leveraging and stabilizing his sitting posture. The foot hook foam 24-1 on the foam tube welding part 24-2 is soft and skin-friendly, and directly contacts the user's ankle, avoiding the user's ankle injury and reducing the user's ankle pain during exercise. The sponge is provided on the seat cushion 12 and the back cushion 13, so that when the user sits on the seat cushion 12 and the back cushion 13, the softness and comfort are improved, and the body buffering during exercise is increased, thereby improving safety.

Preferably, the front support tube welding part 2 is also provided with a foam tube fixing seat 24-4, and the foam tube fixing seat 24-4 is provided with a belt ring pin 24-3, and the foam tube welding part 24-2 is installed on the foam tube fixing seat 24-4 through the belt ring pin 24-3. The foam tube fixing seat 24-4 is provided with a plurality of holes, and the belt ring pin 24-3 is fixed on the foam tube fixing seat 24-4. Under the action of the belt ring pin 24-3, the foam tube welding part 24-2 can adjust the angle along the front support tube welding part 2. The user can adjust the foam tube welding part 24-2 to different angles by inserting the belt ring pin 24-3 into different holes on the foam tube fixing seat 24-4. After the adjustment is completed, the user's feet are hooked on the foam tube welding part 24-2, and the angle is more in line with the user's corresponding exercise, thereby improving the fit between the user and the device.

The present invention also provides a dumbbell bench training system, which includes an extended structure of the dumbbell bench, and can also achieve the technical effect of the extended structure of the dumbbell bench.

The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. An expanded structure of dumbbell bench, dumbbell bench includes: the stool body sets up back stay tube weldment (1) of stool body rear end sets up preceding stay tube weldment (2) of stool body front end, be provided with seatpad stay tube (6) on preceding stay tube weldment (2), with seatpad pipe (5) that seatpad stay tube (6) are connected, be provided with seatpad (12) on seatpad pipe (5), set up cushion pipe (7) in the stool body, with cushion stay tube (8) that cushion pipe (7) are connected, be provided with cushion (13) on cushion pipe (7), its characterized in that: the back cushion tube (7) is movably connected to the stool body, the back cushion tube (7) is movably connected with a rotating arm tube (11), and at least one pull rope is arranged between the back cushion tube (7) and the rotating arm tube (11).

2. The extension structure of dumbbell bench according to claim 1, wherein: the stool body further includes: the rear support tube welding piece (1) is provided with a rear foot tube (4-1), the front support tube welding piece (2) is provided with a front foot tube (3-1), and two sides of the front foot tube (3-1) are respectively provided with a carrying wheel (3-2).

3. The extension structure of the dumbbell bench according to claim 2, wherein: the upper end of the back cushion tube (7) is provided with a rotating arm tube fixing piece (10) for fixing the rotating arm tube (11), the rotating arm tube (11) is connected with an elastic pull rope (14) through a nylon pull rope (18), and the elastic pull rope (14) passes through the pulley fixing piece (9) to be connected with the rear foot tube (4-1).

4. The expanded structure of the dumbbell bench according to claim 3, wherein: the four elastic pull ropes (14) are arranged at two ends of the elastic pull ropes (14), hoist hooks (15) are arranged at two ends of each elastic pull rope (14), each two elastic pull ropes (14) are respectively arranged at two sides of the rear support pipe welding piece (1), stretching hooks (4-2) are respectively arranged at two ends of the rear foot pipe (4-1), and the hoist hooks (15) on each two elastic pull ropes (14) penetrate through the stretching hooks (4-2) to be fixed on the rear foot pipe (4-1).

5. The expanded structure of the dumbbell bench according to claim 3, wherein: the pulley fixing piece (9) is provided with a large pulley (16), and the bottom end of the large pulley (16) is provided with a large pulley limiting piece (17).

6. The extension structure of dumbbell bench according to claim 1, wherein: the back support tube welding piece (1) is provided with a plurality of baffles for supporting the back cushion support tube (8), and the front support tube welding piece (2) is provided with a plurality of baffles for supporting the seat cushion support tube (6).

7. The expanded structure of the dumbbell bench according to claim 3, wherein: the hoist hook (15) at the top end of the elastic pull rope (14) is connected with a pull ring (19), the pull ring (19) is connected with a nylon pull rope (18), the top end of the nylon pull rope (18) penetrates through the inside of the rotating arm pipe (11) and is connected with a pull handle (23) through a small pulley (20-1), the small pulley (20-1) is fixed at the outer end of the rotating arm pipe (11) through a rotating pulley seat (21), a limiting ball (22) is arranged between the pull handle (23) and the nylon pull rope (18), and a limiting ball head bolt (20-2) is arranged on the rotating arm pipe (11).

8. The extension structure of dumbbell bench according to claim 1, wherein: the novel foam cushion is characterized in that a foam tube welding piece (24-2) is arranged on the front support tube welding piece (2), the foam tube welding piece (24-2) is T-shaped, foot hooking foam (24-1) is arranged on the foam tube welding piece, and a sponge body is arranged on the seat cushion (12) and the back cushion (13).

9. The extension structure of dumbbell bench according to claim 7, wherein: the foam tube welding device is characterized in that a foam tube fixing seat (24-4) is further arranged on the front support tube welding piece (2), a ring-carrying bolt (24-3) is arranged on the foam tube fixing seat (24-4), and the foam tube welding piece (24-2) is installed on the foam tube fixing seat (24-4) through the ring-carrying bolt (24-3).

10. A dumbbell bench training system, characterized in that: comprising the following steps: the expanded structure of the dumbbell bench of any of claims 1-9.