CN117046031A - Barbell shoulder lifting body-building device - Google Patents

Abstract

The invention discloses a barbell shoulder press fitness device, which relates to the field of fitness equipment. The technical solution is that it includes a human body support part for providing a support position for the user's body; a load-bearing component including a load-bearing rod and a counterweight component; a load-bearing support part , including a cavity that can accommodate the weight component at positions corresponding to both sides of the human body support part, and the counterweight component is disposed in the cavity; the load-bearing support part also includes a cavity for supporting the load-bearing rod. Supporting mechanism. The beneficial effect of the present invention is that the embodiment of the present application combines the first support part and the second support part in the support mechanism to protect the ascending and descending processes in the pressing process with different structures. The first support part is composed of a first support plate and a first limit plate. If the user cannot bear the center of the barbell plate and causes the load bar to drop, the first support plate can support the load with the rental of the limit plate. pole to ensure user safety.

Description

Barbell shoulder press fitness equipment

Technical field

The invention relates to the field of fitness equipment, specifically a barbell shoulder press fitness device.

Background technique

Fitness is a kind of sports, such as a variety of freehand aerobics, aerobics, gymnastics and various self-resistance movements. Through fitness, you can enhance strength, improve body flexibility, increase endurance, improve body coordination and the ability to control various parts of the body. , so as to achieve the purpose of strengthening the body. The barbell shoulder press is one of the fitness activities to increase the strength of the upper limbs.

The barbell shoulder press requires the bodybuilder to sit on a bench, use his shoulders to hold the barbell, and hold the barbell with both hands. The distance between the hands is slightly wider than the shoulder. After the posture is established, the bodybuilder can exert force to lift the barbell upwards, and slowly straighten his hands to lift the barbell. Lift the barbell as high as the highest point that your arms can reach, then put it down and start a new round of pressing again. In this process, bodybuilders can achieve the purpose of improving upper limb muscle strength.

Although the barbell shoulder press can greatly improve the strength of the bodybuilder's upper limbs, during the barbell shoulder press, the bodybuilder's arm strength will also be greatly consumed, and it is easy to cause loss of force during long-term exercise. Once the problem of force loss occurs, the muscles of the bodybuilder will be easily strained, and even worse, the bodybuilder will be injured. In view of this, the present invention proposes a barbell shoulder press fitness device.

Contents of the invention

In view of one of the shortcomings of the prior art, the present invention provides a barbell shoulder press fitness device to solve the safety problem of the seated barbell shoulder press movement.

In order to achieve the above object, the present invention provides the following technical solution: a barbell shoulder press fitness device, including:

The human body support part is used to provide a support position for the user's body, and is provided with a support area corresponding to the user's sitting posture;

A load-bearing component includes a load-bearing bar and a counterweight component. The load-bearing bar is placed transversely above the human body support part. The counterweight component includes a number of barbell plates that are detachably connected to both ends of the load-bearing bar;

The load-bearing support part includes a cavity that can accommodate the counterweight component at positions corresponding to both sides of the human body support part. The counterweight component is disposed in the cavity, and the two ends of the load-bearing rod extend to the load-bearing part. In the cavity of the support part, the load-bearing rod can drive the counterweight assembly to rise or fall in the cavity; the load-bearing support part also includes a support mechanism for supporting the load-bearing rod.

Preferably, the human body support part includes:

The lower body support part is used to provide support for the user's hip position in a sitting position;

A trunk support part is provided on one side of the lower body support part and is used to provide support for the user's back;

The arm support portion is provided on two parallel sides adjacent to the lower body support portion and the trunk support portion, and is used to provide supporting force for the arm when the user performs upward pressing.

Preferably, the upper side of the lower body support part is a downwardly depressed area, and a seat cushion is provided in the area;

The trunk support part includes a curved backrest, and a number of ventilation holes are provided on the backrest;

The arm support part is arranged in an "eight"-shaped structure on both sides of the lower body support part, with one end of its small opening close to the trunk support part; the upper end of the arm support part is provided with an arm groove corresponding to the human arm. The arm groove is a lower groove with an arc-shaped bottom. An open opening is provided at one end of the arm groove toward the trunk support portion, and an arc-shaped transition surface from the groove bottom to the groove top is provided at the end away from the trunk support portion.

Preferably, the load-bearing rod includes:

A holding rod, straddling the human body support part, is used for the user to hold when performing pressing;

Adjusting rods are provided at both ends of the holding rod, and are sleeved and slidingly connected with the holding rod. The sliding direction of the sliding connection is the axial direction of the adjusting rod;

A socket is provided in the middle of the barbell plate of the counterweight assembly corresponding to the adjustment rod.

Preferably, a chute slider combination is provided between the holding rod and the adjusting rod, and the sliding direction of the chute slider combination is the axial direction of the holding rod; the adjusting rod is provided with an outer Thread; the load-bearing rod also includes:

One adjusting seat is provided corresponding to each adjusting rod, and the adjusting seat is threadedly connected to the adjusting rod; the load-bearing support part is provided with an adjusting seat limiting structure corresponding to the adjusting seat, and the adjusting seat limiting structure is sufficient to allow the adjusting seat to be in position It rises or falls vertically, and the adjusting seat does not rotate relative to the axial direction of the adjusting rod.

Preferably, the support mechanism of the load-bearing support part includes:

A support frame is arranged in the cavity;

The first support part is connected to the support frame and used to provide protection when the load-bearing bar moves upward; the first support part includes:

There are several first support plates distributed in an array in the vertical direction, and one side of the first support plate is hinged with the frame of the support frame;

There is one first limiting plate corresponding to each first supporting plate. The first limiting plate is fixedly connected to the support frame, and the first limiting plate is located on the lower side of the first supporting plate.

Preferably, a groove corresponding to the load-bearing rod is formed on the upper side of the first support plate, and a plate body extending upward is provided on the side of the first support plate facing the user.

Preferably, the support mechanism of the load-bearing support part further includes:

The second support part is arranged on the support frame. The second support part is opposite to the first support part. There is a gap between the second support part and the first support part. The load-bearing rod is located on the second support part when in use. Between the support part and the first support part; the second support part is used to provide support force when the user drives the load-bearing bar downward; the second support part includes:

The second support plate has one side of the plate body hinged with the support frame, and the other side extends in the direction of the first support part; a torsion spring is provided at the hinge of the second support plate and the support frame, and in the natural state of the torsion spring down, the second support plate is in a horizontal state.

Preferably, the side that the user faces when the fitness equipment is in use is the front side, and the side facing away from it is the rear side; the support frame can slide back and forth in the cavity from the front side to the rear side; so The first support part is provided at the rear part of the support frame, and the second support part is provided at the front part of the support frame; the load-bearing support part also includes a linkage mechanism for driving the movement of the support frame, the Linkage agencies include:

The active rod is arranged at the upper part of the cavity, and a corresponding active rod groove is provided in the cavity; one end of the active rod extends above the moving path of the load-bearing rod, and the active rod can be raised under the pushing force of the load-bearing rod;

The driven rod group is arranged on the rear side of the support frame and includes two driven rods. The driven rods are arranged in a symmetrical structure. One end of each driven rod is hinged with the rear side of the support frame, and the other end Extends toward the rear of the support frame;

A driven slider is provided corresponding to each driven rod, and is hingedly connected to the end of the driven rod away from the support frame; a vertical driven chute is provided in the cavity corresponding to the driven slider. The driven slide block is slidingly connected to the driven chute; the driven slide block located at the upper part is fixedly connected to one end of the driving rod;

A return spring is located on the front or rear side of the support frame and is arranged between the inner wall of the cavity and the support frame.

Preferably, the load-bearing support part further includes:

The locking mechanism is used to lock the moving position of the support frame; the locking mechanism includes:

A locking rod is provided at the lower part of the cavity and can slide in the horizontal direction, and the sliding direction of the locking rod is perpendicular to the sliding direction of the support frame;

A locking block is fixedly connected to the locking rod and extends toward one side of the driven slider; the block body of the driven slider located at the lower part is provided with a slot corresponding to the locking block;

A locking pad is provided at the lower end of the moving path of the load-bearing rod in use, and is slidably connected to the structure of the load-bearing support part in the vertical direction. The lower end of the locking pad is provided with at least one support spring; locking An arc-shaped groove is provided on one side of the cushion block;

One end of the locking rod is provided with a guide block, the guide block is a sphere, and the guide block is slidingly connected to the arc-shaped groove.

Preferably, the load-bearing support part further includes:

There is one barbell guide groove corresponding to each barbell plate, which is a vertical guide groove opened in the cavity; the lower part of the barbell guide groove is provided with an observation port.

Compared with the prior art, it has the following beneficial effects: the embodiment of the present application stores the barbell plate for training in the cavity of the weight-bearing support part. The first support part and the second support part in the support mechanism are combined to protect the ascending and descending processes in the pushing process with different structures. The first support part is composed of a first support plate and a first limit plate. If the user cannot bear the center of the barbell plate and causes the load bar to drop, the first support plate can support the load with the rental of the limit plate. pole to ensure user safety.

The second support part adopts a structure in which a second support plate is combined with a torsion spring. The second support plate transmits the force of the torsion spring to the descending load-bearing rod, which plays a buffering role when descending. It also improves the user's performance in the training process. security in.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

Figure 2 is a schematic diagram of the connection structure of the counterweight component according to the embodiment of the present application;

Figure 3 is a schematic structural diagram of a longitudinal cross-section of an embodiment of the present application;

Figure 4 is a schematic diagram of the internal state of the cavity according to the embodiment of the present application;

Figure 5 is a schematic diagram of the support mechanism and linkage mechanism according to the embodiment of the present application;

Figure 6 is a schematic diagram of the locking mechanism according to the embodiment of the present application;

Figure 7 is an enlarged view of part A of Figure 6;

Figure 8 is a schematic cross-sectional structural diagram of an embodiment of the present application.

In the picture:

1. Human body support part; 11. Lower body support part; 12. Trunk support part; 13. Arm support part; 131. Arm groove;

2. Load-bearing component; 21. Load-bearing rod; 211. Grip lever; 212. Adjustment lever; 22. Counterweight component

3. Load-bearing support part; 31. Cavity; 32. Support frame;

33. The first supporting part; 331. The first supporting plate; 332. The first limiting plate;

34. Second support part; 341. Second support plate;

351. Driving rod; 352. Driving rod; 353. Driving slide block; 3531. Driving chute; 3532. Card slot;

361. Locking rod; 3611. Locking chute; 3612. Guide block; 362. Locking block

37. Barbell guide groove; 371. Observation port.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figure 1-Figure 3. This application provides the following technical solutions:

A barbell shoulder press fitness equipment includes a human body support part 1, a load-bearing component 2 and a load-bearing support part 3. The human body support part 1 is used to provide a support position for the user's body, and is provided with a support area corresponding to the user's sitting posture; its function is similar to the seat in seated press training, providing the user with a body placement position when using the device. The weight-bearing component 2 is used as a trainer's weight-bearing object. The weight-bearing component 2 includes a weight-bearing rod 21 and a counterweight component 22. The weight-bearing rod 21 is placed transversely above the human body support part 1. The counterweight component 22 includes a number of weight-bearing components that can be connected to both ends of the weight-bearing rod 21. Remove the attached barbell plate. The weight-bearing support part 3 is used to provide protection to the user during use. It includes a cavity 31 corresponding to both sides of the human body support part 1 that can accommodate the counterweight assembly 22. The counterweight assembly 22 is disposed in the cavity. 31, both ends of the load-bearing rod 21 extend into the cavity 31 of the load-bearing support part 3, and the load-bearing rod 21 can drive the counterweight assembly 22 to rise or fall in the cavity 31; the load-bearing support part 3 also includes a The support mechanism of rod 21.

In this solution, the barbell plate used during use, that is, the counterweight component 22 is stored inside the cavity 31, and on this basis, it is combined with a support mechanism that can provide support for the load-bearing bar 21 as a protection during exercise, thereby Improve users' safety when performing fitness activities.

On the basis of the above embodiment, the human body support part 1 includes a lower body support part 11 , a trunk support part 12 and an arm support part 13 . The lower body support part 11 is used to provide support for the user's buttocks in a sitting position; the trunk support part 12 is provided on one side of the lower body support part 11 and is used to provide support for the user's back; the arm support part 13 is provided on The two parallel sides adjacent to the lower body support part 11 and the trunk support part 12 are used to provide supporting force for the user's arms when performing upward pressing.

The upper side of the lower body support part 11 is a downwardly depressed area, and a seat cushion or a seat plate is provided in the area; the trunk support part 12 includes a backrest with a curvature, and a number of ventilation holes are provided on the backrest; the arm support part 13 supports the lower body Both sides of the arm support part 11 are arranged in an "eight" shape, with one end of the small opening close to the trunk support part 12; the upper end of the arm support part 13 is provided with an arm groove 131 corresponding to the human arm, and the arm groove 131 is a lower groove. The bottom of the groove is an arc-shaped surface, and the arm groove 131 is provided with an open opening at one end toward the trunk support portion 12 , and an arc-shaped transition surface from the groove bottom to the groove top is provided at the end away from the trunk support portion 12 .

When exercising, the user sits on the lower body support part 11 , leans back against the trunk support part 12 , and places the elbows in the arm grooves 131 of the arm support part 13 . Then you can perform pushing exercises. The reason why the arm groove 131 adopts the above structure is that on the one hand, it takes into account the arm posture that is more convenient for exerting force when the human body performs pushing movements. On the other hand, an arc-shaped transition surface is provided at one end of the arm groove 131, which will not affect the user's posture. The elbow movement can prevent the user's elbow from sliding out of the arm groove 131 excessively. Increase the safety of using this fitness equipment to a certain extent.

On the basis of the above embodiment, referring to FIG. 2 , the load-bearing bar 21 includes a holding bar 211 , which is disposed above the human body support part 1 and is used for the user to hold when pressing. Adjusting rods 212 are provided at both ends of the holding rod 211. The adjusting rods 212 are sleeved with the holding rod 211 and are slidingly connected. The sliding direction of the sliding connection is the axial direction of the adjusting rod 212. A socket is provided in the middle of the barbell plate of the counterweight assembly 22 corresponding to the adjusting rod 212 . The training weight is adjusted by adjusting the rod 212 through different numbers of barbell plates.

A chute slider assembly is provided between the rod bodies of the holding rod 211 and the adjusting rod 212. The sliding direction of the chute slider combination is the axial direction of the holding rod 211; the rod body of the adjusting rod 212 is provided with external threads; a load-bearing The rod 21 also includes an adjusting seat 213. One adjusting seat 213 is provided corresponding to each adjusting rod 212. The adjusting seat 213 is threadedly connected to the adjusting rod 212. The load-bearing support part 3 is provided with an adjusting seat limiting structure corresponding to the adjusting seat 213. The adjusting seat is limited. The structure is such that the adjustment seat 213 can rise or fall in the vertical direction, and the adjustment seat 213 will not rotate relative to the axial direction of the adjustment rod 212 .

In this solution, the adjusting seat 213 is a rectangular block with a threaded hole in the middle. A vertical chute is provided in the cavity 31 corresponding to the adjusting seat 213. The outer wall of the adjusting seat 213 is in contact with the chute, thereby ensuring that the adjusting seat 213 is in contact with the chute. 213 can move up and down along the chute without rotating.

When the counterweight needs to be adjusted, the user rotates the holding rod 211, thereby driving the adjusting rod 212 to rotate. Under the threaded connection of the adjusting seat 213, the adjusting rod 212 moves along its own axial direction, thereby realizing the adjustment of different numbers of barbell plates. Plug.

As a further solution, anti-slip protrusions are distributed on the outside of the holding rod 211 .

Based on the above embodiment, referring to FIGS. 4 and 5 , the support mechanism of the load-bearing support part 3 includes a support frame 32 , and the support frame 32 is a “U”-shaped frame disposed in the cavity 31 . A first support part 33 and a second support part 34 are respectively provided on both sides of the support frame 32 . The first support part 33 is used to provide protection when the load-bearing bar 21 moves upward; it includes a plurality of first support plates 331. The first support plates 331 are distributed in an array in the vertical direction. One side of the first support plate 331 is connected to the support frame 32. The frame is hinged. A first limiting plate 332 is provided corresponding to each first supporting plate 331 . The first limiting plate 332 is fixedly connected to the supporting frame 32 , and the first limiting plate 332 is located on the lower side of the first supporting plate 331 . A groove corresponding to the load-bearing rod 21 is formed on the upper side of the first support plate 331 , and a plate body extending upward is provided on the side of the first support plate 331 facing the user.

The second support part 34 is arranged opposite to the first support part 33. There is a gap between the second support part 34 and the first support part 33. When in use, the load-bearing rod 21 is located between the second support part 34 and the first support part 33. between the first supporting parts 33; the second supporting part 34 is used to provide supporting force when the user drives the load-bearing rod 21 to move downward; the second supporting part 34 includes a second supporting plate 341, and the second supporting plate 341 has a plate body. One side is hinged with the support frame 32, and the other side extends toward the direction of the first support part 33; a torsion spring is provided at the hinge of the second support plate 341 and the support frame 32. In the natural state of the torsion spring, the second support plate 341 in a horizontal state.

The side that the user faces when the fitness equipment is in use is the front side, and the side facing away is the rear side; the first support part 33 is provided at the rear of the support frame 32, and the second support part 34 is provided at the support frame 32 the front part of.

When the load-bearing rod 21 moves upward under the push of the user, as the user exerts force, the rod body of the load-bearing rod 21 pushes the first support plate 331 to rotate upward without affecting the load-bearing rod 21 . If the user accidentally loses force or cannot bear the weight, the load-bearing rod 21 will fall. At this time, the load-bearing rod 21 will fall into the notch of the first support plate 331 and be supported by the first limiting plate 332. Stable support to ensure user safety.

When the user moves down the load-bearing rod 21 after completing the upward push, the position of the load-bearing rod 21 can be slightly adjusted so that it corresponds to the second limiting portion 34. As the load-bearing rod 21 descends, each second support plate 341 can provide the load-bearing rod 21 with the support force of its corresponding torsion spring and play a buffering role.

On the basis of the above embodiment, see Figures 4 and 5, considering that in the above scheme the user still needs to adjust the position during the lifting and falling of the load-bearing rod 21, this structural scheme adds the ability to drive the support frame 32 horizontally Movement linkage mechanism to solve the above problems. A space for sliding movement of the corresponding support frame is provided in the cavity 31 , and the support frame 32 can slide back and forth in the direction from the front side to the rear side in the cavity 31 . The linkage mechanism includes an active rod 351 and a driven rod group. The active rod 351 is arranged at the upper part of the cavity 31. The cavity 31 is provided with an active rod slot corresponding to 351; one end of the active rod 351 extends to above the moving path of the load-bearing rod 21. , the driving rod 351 can be raised under the pushing force of the load-bearing rod 21; the driven rod group is arranged on the rear side of the support frame 32, including two driven rods 352, the driven rods 352 are arranged in a symmetrical structure, each driven rod One end of the rod 352 is hinged with the rear side of the support frame 32 , and the other end extends toward the rear of the support frame 32 . A driven slide block 353 is provided corresponding to each driven rod 352, and the driven slide block 353 is hingedly connected to an end of the driven rod 352 away from the support frame 32; a vertical follower is provided in the cavity 31 corresponding to the driven slide block 353. The moving slide groove 3531, the driven slide block 353 and the driven slide groove 354 are slidingly connected. A return spring 355 is also provided on the rear side of the support frame 32 , and the return spring 355 is provided between the inner wall of the cavity 31 and the support frame 32 . The end of the driving rod 351 is provided with an upward concave notch corresponding to the load-bearing rod 21 .

Through the structure of this solution, when the load-bearing rod 21 is pushed up, it can push up the active rod 351 when it is pushed to the top. The movement of the active rod 351 can drive the upper driven slide block 353 to move upward, thereby pulling the driven rod 353 upward. When the rod 352 moves, the angle of the other driven rod 352 changes correspondingly, which can pull the movable frame 32 toward the rear. As one of the implementation forms of this solution, the driven slide block 353 and the driven slide groove 3531 are corresponding "T"-shaped blocks and "T"-shaped grooves.

Through this structural solution, after the upward push is completed, the movable frame 32 will move backward. At this time, the second limiting portion 34 can move closer to the lower part of the load-bearing rod 21 .

On the basis of the above embodiment, see Figures 6 to 7, the load-bearing support part 3 also includes a locking mechanism, which is used to lock the moving position of the support frame 32; the locking mechanism includes a locking mechanism provided at the lower part of the cavity 31 The locking rod 361 can slide in the horizontal direction, and the sliding direction of the locking rod 361 is perpendicular to the sliding direction of the support frame 32 . A locking block 362 is fixedly connected to the locking rod 361, and the locking block 362 extends toward one side of the driven slider 353; the block body of the driven slider 353 located at the bottom is provided with a slot 3532 corresponding to the locking block 362. , the upper side of the locking block 362 is a bevel, and the lower side is a flat surface. When the load-bearing rod 21 is in use, a locking pad 363 is provided at the lower end of the moving path. The locking pad 363 is slidably connected to the structure of the load-bearing support part 3 in the vertical direction. The lower end of the locking pad 363 is provided with at least one Support spring; the locking pad 363 has an arc-shaped groove 3631 on one side of the block. One end of the locking rod 361 is provided with a guide block 3612. The guide block 3612 is a sphere, and the guide block 3612 is slidably connected to the arc-shaped groove 3631.

Through this structure, when the moving frame 32 moves backwards driven by the active rod 351, the lower driven slide block 353 pushes the locking block 362 from top to bottom, causing the locking block 362 to push the locking rod 361 to translate. , the locking block 362 retracts into the locking chute 3611 and will not affect the driven slider 353. At this time, the guide block 3612 is located at the bottom of the arc-shaped groove 3631.

As the driven slider 353 continues to descend, when the slot 3532 reaches the position of the locking block 362, the locking rod 361 locks the pad 363 under the restoring force of the spring and cooperates with the vertical movement of the locking pad 363 to produce a horizontal displacement. , so that the locking block 362 pops out toward the card slot 3532 and is inserted into the card slot 3532. Because the lower surface of the locking block 362 is flat, the lower driven slide block 353 can be limited to overcome the force of the return spring 354, so that the entire moving frame 32 is in a rearward position. This ensures that the load-bearing rod 21 is not affected by the first support portion 33 during its descent.

When the load-bearing rod 21 drops to the bottom, it contacts the groove on the upper part of the locking pad 363, pressing down the locking pad 363. As the locking pad 363 is pressed down, the guide block 3612 is driven toward the arc groove. The upper part of 3631 moves, which causes the locking rod 361 to move in a direction away from the driven slide block 353, thereby causing the locking block 362 to disengage from the slot 3531. Then the moving frame 32 can be reset under the action of the return spring 354. Then you can proceed to the next pressing training.

Based on the above embodiment, referring to Figure 8, the load-bearing support part 3 also includes a barbell guide groove 37. There is one barbell guide groove 37 corresponding to each barbell plate, which is a vertical guide groove opened in the cavity 31; the barbell guide groove 37 is a vertical guide groove opened in the cavity 31; An observation port 371 is provided at the lower part of the guide groove 37 . The observation port 371 can observe the insertion state of the adjusting rod 212 and the barbell plate through this position.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still The technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (11)

1. A barbell shoulder press fitness device, which is characterized in that it includes: The human body support part (1) is used to provide a support position for the user's body, and is provided with a support area corresponding to the user's sitting posture; The load-bearing component (2) includes a load-bearing rod (21) and a counterweight component (22). The load-bearing rod (21) is placed transversely above the human body support part (1). The counterweight component (22) includes several load-bearing rods (22). 21) Barbell plates with detachable connections at both ends; The load-bearing support part (3) includes a cavity (31) provided at positions corresponding to both sides of the human body support part (1) that can accommodate the counterweight assembly (22). The counterweight assembly (22) is arranged on In the cavity (31), both ends of the load-bearing rod (21) extend into the cavity (31) of the load-bearing support part (3), and the load-bearing rod (21) can drive the counterweight assembly (22) in the cavity (31). The load-bearing support part (3) also includes a support mechanism for supporting the load-bearing rod (21). 2. The barbell shoulder press fitness equipment according to claim 1, characterized in that the human body support part (1) includes: The lower body support part (11) is used to provide support for the user's hip position in a sitting position; The trunk support part (12) is provided on one side of the lower body support part (11) and is used to provide support for the user's back; The arm support part (13) is provided on two parallel sides adjacent to the lower body support part (11) and the trunk support part (12), and is used to provide supporting force for the user's arm when performing upward pressing. 3. The barbell shoulder press fitness equipment according to claim 2, characterized in that the upper side of the lower body support part (11) is a downwardly depressed area, and a seat cushion is provided in the area; The trunk support part (12) includes a backrest with a curvature, and a number of ventilation holes are provided on the backrest; The arm support part (13) is arranged in an "eight" shape on both sides of the lower body support part (11), with one end of its small opening close to the trunk support part (12); the arm support part (13) ) is provided with an arm groove (131) corresponding to the human arm at its upper end. The arm groove (131) is a lower groove, and the bottom of the groove is an arc surface. One end of the arm groove (131) facing the trunk support part (12) is provided with The end of the open opening away from the trunk support part (12) is provided with an arc-shaped transition surface from the bottom of the groove to the top of the groove. 4. The barbell shoulder press fitness equipment according to claim 1, characterized in that the weight-bearing bar (21) includes: The holding rod (211) is located across the top of the human body support part (1) and is used for the user to hold when performing presses; The adjusting rod (212) is provided at both ends of the holding rod (211), is sleeved with the holding rod (211) and is slidingly connected. The sliding direction of the sliding connection is the axial direction of the adjusting rod (212); A socket is provided in the middle of the barbell plate of the counterweight assembly (22) corresponding to the adjustment rod (212). 5. The barbell shoulder press fitness device according to claim 4, characterized in that a chute and slider combination is provided between the rod bodies of the holding rod (211) and the adjusting rod (212). The sliding direction of the block assembly is the axial direction of the holding rod (211); the rod body of the adjusting rod (212) is provided with external threads; the load-bearing rod (21) also includes: One adjustment seat (213) is provided corresponding to each adjustment rod (212), and the adjustment seat (213) is threadedly connected to the adjustment rod (212); the load-bearing support part (3) is provided corresponding to the adjustment seat (213) There is an adjustment seat limit structure, and the adjustment seat limit structure is sufficient to allow the adjustment seat (213) to rise or fall in the vertical direction, and the adjustment seat (213) will not rotate relative to the axial direction of the adjustment rod (212). 6. The barbell shoulder press fitness equipment according to claim 1, characterized in that the support mechanism of the weight-bearing support part (3) includes: A support frame (32) is provided in the cavity (31); The first support part (33) is connected to the support frame (32) and is used to provide protection when the load-bearing rod (21) moves upward; the first support part (33) includes: There are several first support plates (331) distributed in an array in the vertical direction, and one side of the first support plate (331) is hingedly connected to the body of the support frame (32); There is one first limiting plate (332) corresponding to each first supporting plate (331). The first limiting plate (332) is fixedly connected to the supporting frame (32), and the first limiting plate (332) is fixedly connected to the supporting frame (32). (332) is located on the lower side of the first support plate (331). 7. The barbell shoulder press fitness device according to claim 6, characterized in that a groove corresponding to the load-bearing rod (21) is provided on the upper side of the first support plate (331), and the first support plate (331) ) is provided with an upwardly extending plate body on the side facing the user. 8. The barbell shoulder press fitness equipment according to claim 6, characterized in that the support mechanism of the weight-bearing support part (3) further includes: The second support part (34) is arranged on the support frame (32). The second support part (34) is arranged opposite to the first support part (33). The second support part (34) and the first support part (33) There is a gap between 33), and the load-bearing rod (21) is located between the second support part (34) and the first support part (33) when in use; the second support part (34) is used to move the The load-bearing rod (21) provides support when it moves downward; the second support part (34) includes: The second support plate (341) has one side of the plate body hinged with the support frame (32), and the other side extends in the direction of the first support part (33); the second support plate (341) and the support frame (32) ) is provided with a torsion spring at its hinge. In the natural state of the torsion spring, the second support plate (341) is in a horizontal state. 9. The barbell shoulder press fitness device according to claim 8, wherein the side facing the user when the fitness device is in use is the front side, and the side facing away from it is the rear side; the support frame (32) can slide back and forth in the cavity (31) from the front side to the rear side; the first support part (33) is provided at the rear of the support frame (32), and the second support part (34) ) is provided at the front of the support frame (32); the load-bearing support part (3) also includes a linkage mechanism for driving the movement of the support frame (32), and the linkage mechanism includes: The active rod (351) is arranged at the upper part of the cavity (31), and an active rod slot corresponding to (351) is provided in the cavity (31); one end of the active rod (351) extends to the load-bearing rod (21) and moves Above the path, the active rod (351) can be raised under the pushing force of the load-bearing rod (21); The driven rod group is arranged on the rear side of the support frame (32) and includes two driven rods (352). The driven rods (352) are arranged in a symmetrical structure, and one end of each driven rod (352) is evenly spaced. It is hinged to the rear side of the support frame (32), and the other end extends toward the rear of the support frame (32); A driven slider (353) is provided corresponding to each driven rod (352), and is hingedly connected to the end of the driven rod (352) away from the support frame (32); corresponding to the driven slider (353) in the cavity (31). The driven slide block (353) is provided with a vertical driven slide groove (3531), and the driven slide block (353) is slidingly connected to the driven slide groove (354); the driven slide block (353) located at the upper part ) is fixedly connected to one end of the driving rod (351); The return spring (355) is located on the front or rear side of the support frame (32), and is arranged between the inner wall of the cavity (31) and the support frame (32). 10. The barbell shoulder press fitness equipment according to claim 9, characterized in that the weight-bearing support part (3) further includes: The locking mechanism is used to lock the moving position of the support frame (32); the locking mechanism includes: The locking rod (361) is provided at the lower part of the cavity (31) and can slide in the horizontal direction. The sliding direction of the locking rod (361) is perpendicular to the sliding direction of the support frame (32); The locking block (362) is fixedly connected to the locking rod (361) and extends toward one side of the driven slider (353); the corresponding locking block is located on the lower body of the driven slider (353). The stop block (362) is provided with a slot (3532); The locking pad (363) is arranged at the lower end of the movement path of the load-bearing rod (21) when in use, and is slidingly connected to the structure of the load-bearing support part (3) in the vertical direction. The locking pad (363) ) is provided with at least one supporting spring at its lower end; an arc-shaped groove (3631) is provided on one side of the block of the locking pad (363); One end of the locking rod (361) is provided with a guide block (3612). The guide block (3612) is a sphere, and the guide block (3612) is slidingly connected to the arc-shaped groove (3631). 11. The barbell shoulder press fitness equipment according to claim 8, characterized in that the weight-bearing support part (3) further includes: There is one barbell guide groove (37) corresponding to each barbell plate, which is a vertical guide groove opened in the cavity (31); an observation port (371) is provided at the bottom of the barbell guide groove (37).