A linkage folding dumbbell bench

Abstract

The utility model discloses a linkage folding dumbbell bench, which belongs to the technical field of fitness equipment, and includes a backrest, a bench, a backrest support frame, a bench support frame, a sliding adjustment frame, a backrest folding member and a bench folding member; the backrest support frame includes a front support member, a rear support member and a linear slide rail, a backrest support column is fixedly connected to the rear support member, and the backrest folding member is hinged to the backrest support column and the backrest; the sliding adjustment frame includes a sliding member, a backrest support member and a bench support member, the linear slide rail and the sliding member are locked by a locking mechanism, the backrest support member is fixedly connected to the sliding member and the backrest is hinged, the bench support member is fixedly connected to the sliding member and the bench is hinged, and the bench folding member is hinged to the front support member and the middle part of the bench; the bench support frame includes a bench support column hinged to the bench and a folding connector hinged to the bench support column. The backrest and the bench can be linked and folded to achieve synchronous adjustment and improve the adjustment efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of fitness equipment, in particular to a linkage folding dumbbell stool. Background Art

[0002] Dumbbell benches, as fitness auxiliary equipment, are often used to assist dumbbells in completing some necessary fitness movements, such as: incline dumbbell bench press, decline dumbbell bench press, flat dumbbell flye, etc. By practicing with dumbbells, you can improve the control of joints and muscles in various parts of the body, exercise the small muscle groups around the target muscle groups, and stimulate the muscle tissue at the connection points of the muscle groups. The muscle groups in various parts are connected more closely, and the exercised muscles give people a more coordinated feeling. The dumbbell bench mainly includes a seat part and a backrest part. By adjusting the angles of the seat and the backrest, the dumbbell user can train different parts during use. However, in the existing dumbbell bench products, the seat and backrest of the dumbbell bench can only be adjusted separately and cannot be adjusted synchronously, resulting in slow adjustment efficiency. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned technical problems and to provide a linkage folding dumbbell bench. With the cooperation of a backrest support frame, a seat support frame, a sliding adjustment frame, a backrest folding member and a seat folding member, the sliding component is pulled, and under the push of the backrest folding member and the seat folding member, the backrest and the seat can be linked and folded, synchronous adjustment can be achieved, and the adjustment efficiency can be improved.

[0004] To achieve the above-mentioned purpose, the utility model provides the following solution: The utility model discloses a linkage folding dumbbell bench, comprising a backrest, a seat, a backrest support frame, a seat support frame, a sliding adjustment frame, a backrest folding member and a seat folding member;

[0005] The backrest support frame includes a front support member, a rear support member and a linear slide rail, the linear slide rail is horizontally arranged on the ground through the front support member and the rear support member, the front support member and the rear support member are respectively fixedly connected to two ends of the linear slide rail, the extension direction of the linear slide rail is the same as the length direction of the backrest and the bench, the rear support member is fixedly connected with a backrest support column for abutting against the surface of the backrest near one end of the front support member, one end of the backrest folding member is hinged to the backrest support column, and the other end of the backrest folding member is hinged to the middle part of the surface of the backrest;

[0006] The sliding adjustment frame includes a sliding member, a backrest support member and a seat support member, the sliding member is slidably connected to the linear slide rail, the linear slide rail and the sliding member are locked by a locking mechanism, one end of the backrest support member is fixedly connected to one end of the sliding member close to the front support member, the other end of the backrest support member is hinged to one end of the backrest surface close to the rear support member, one end of the seat support member is fixedly connected to one end of the sliding member close to the rear support member, the other end of the seat support member is hinged to one end of the seat surface close to the front support member, one end of the seat folding member is hinged to the front support member, and the other end of the seat folding member is hinged to the middle part of the seat surface;

[0007] The seat support frame includes a seat support column with a bottom for contacting the ground and a folding connection member staggered with the seat folding member, the top of the seat support column is hinged to one end of the seat facing the ground away from the front support member, one end of the folding connection member is hinged to the seat support column, and the other end of the folding connection member is hinged to the backrest support member;

[0008] An end of the bench close to the front support member and an end of the backrest close to the front support member are arranged at a distance.

[0009] Preferably, the linear slide rail is a square tube, and the sliding member is a sliding sleeve sleeved on the square tube.

[0010] Preferably, the locking mechanism comprises a rotating handle, a spring locking mechanism and an adjusting locking hole; the rotating handle is rotatably connected to the middle part of the backrest support by a handle shaft, and the handle shaft is horizontally arranged; the adjusting locking holes are arranged at intervals along the extension direction of the linear slide rail; the spring locking mechanism comprises a pull rod, a locking shaft, a compression spring and a spring sleeve, the backrest support is a square tube, the spring sleeve is tilted and fixedly connected to the backrest support, the top opening of the spring sleeve is fixedly connected to a limiting block, the limiting block is provided with a guide hole, and the locking shaft slides The movable sleeve is arranged in the guide hole; one end of the pull rod is fixedly connected to the handle shaft through a pull rod connecting piece; the other end of the pull rod is hinged to one end of the lock shaft, and the other end of the lock shaft is fixedly connected with a plug, and the sliding sleeve is provided with a plug hole for the plug to extend in and out, and the plug hole can correspond one-to-one with the adjustment locking hole on the moving path of the sliding sleeve; the lock shaft is coaxially fixedly connected to a sliding block slidably connected to the spring sleeve, and the compression spring sleeve is arranged on the lock shaft, and the compression spring is located between the limit block and the sliding block.

[0011] Preferably, the linear slide rail is marked with angle markings corresponding one-to-one to the adjustment locking holes, and the sliding sleeve is provided with a revealing window for revealing the angle markings.

[0012] Preferably, a pull-up handle is provided on the bench support column.

[0013] Preferably, two folding seat members are arranged at a distance from each other, and the folding connecting member is located between the two folding seat members.

[0014] Preferably, the backrest support member and the seat support member are connected via a reinforcement member.

[0015] Preferably, the seat bench includes a seat cushion and a seat cushion mounting frame, the seat cushion is mounted on the seat cushion mounting frame, and the seat cushion mounting frame is hinged to the seat bench support column, the seat bench support member and the seat bench folding member; the backrest includes a back cushion and a back cushion mounting frame, the back cushion is mounted on the back cushion mounting frame, and the back cushion mounting frame is hinged to the backrest support column and the backrest folding member.

[0016] Preferably, one end of the seat cushion close to the front support member and one end of the back cushion close to the front support member are both arc-shaped ends.

[0017] Preferably, the rear support is provided with walking wheels.

[0018] Compared with the prior art, the utility model has achieved the following technical effects:

[0019] The utility model relates to a linked folding dumbbell bench, in which, with the cooperation of a backrest support frame, a seat support frame, a sliding adjustment frame, a backrest folding member and a seat folding member, the sliding member is pulled later, and the sliding member moves along a linear slide rail toward the rear support member, driving the backrest support member and the seat support member to move toward the rear support member at the same time, so that the backrest folding member rotates around the rear support toward the rear support member, and the seat folding member rotates around the front support member toward the rear support member. Subsequently, the backrest folding member pushes the backrest upward, and the backrest rotates around the backrest support toward the front support member, and the seat folding member pushes the seat upward, and the seat rotates around the seat support toward the rear support member, thereby making the backrest and the seat bench linked to fold, realizing synchronous adjustment of the backrest and the seat bench, and improving the adjustment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a linkage folding dumbbell bench (0° folding);

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the linkage folding dumbbell bench (20° folding);

[0023] Figure 3 It is a three-dimensional structural diagram of a linkage folding dumbbell bench (without a sliding adjustment frame);

[0024] Figure 4 for Figure 2 A partial enlarged view of the middle sliding adjustment frame;

[0025] Figure 5 for Figure 3 A partial enlarged view of the middle spring locking mechanism;

[0026] Figure 6 It is a three-dimensional structural schematic diagram of the spring locking mechanism;

[0027] Figure 7 It is an exploded view of the spring locking mechanism;

[0028] Figure 8 It is a front view of the linkage folding dumbbell bench (0° folding);

[0029] Fig. 9 It is a front view of the linkage folding dumbbell bench (in the folding process);

[0030] Fig.10 It is a front view of a linkage folding dumbbell bench (70° folding);

[0031] Fig.11 The diagram shows the folding process of the linkage folding dumbbell bench from 0° to 70°.

[0032] Description of reference numerals:

[0033] 1. Backrest; 2. Stool; 3. Backrest support frame; 4. Stool support frame; 5. Sliding adjustment frame; 6. Rotating handle; 7. Spring locking mechanism; 8. Folding backrest; 9. Folding seat; 10. Pull-up handle; 11. Travel wheel;

[0034] 101. back pad; 102. back pad mounting frame;

[0035] 201, seat cushion; 202, seat cushion mounting frame;

[0036] 301, front support member; 302, rear support member; 303, linear slide rail; 304, backrest support column; 305, adjustment locking hole;

[0037] 401, bench support column; 402, folding connector;

[0038] 501, sliding member; 502, backrest support member; 503, seat support member; 504, reinforcement member; 505, revealing window;

[0039] 601, handle shaft;

[0040] 701, pull rod; 702, lock shaft; 703, compression spring; 704, spring sleeve; 705, limit block; 706, guide hole; 707, pull rod connector; 708, plug; 709, sliding block; 710, locking nut; 711, hinge bolt; 712, sleeve mounting bracket. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] This embodiment provides a linkage folding dumbbell bench, such as Figures 1 to 11 As shown, it includes a backrest 1, a seat 2, a backrest support frame 3, a seat support frame 4, a sliding adjustment frame 5, a locking mechanism, a backrest folding member 8 and a seat folding member 9. Among them:

[0043] The backrest support frame 3 includes a front support member 301, a rear support member 302, a linear slide 303 and a backrest support column 304. The two ends of the linear slide 303 are fixedly connected to the front support member 301 and the rear support member 302 respectively. After the front support member 301 and the rear support member 302 are installed on the ground, the linear slide 303 is horizontally arranged on the ground, and the extension direction of the linear slide 303 is the same as the length direction of the backrest 1 and the bench 2. The bottom end of the backrest support column 304 is fixedly connected to the rear support member 302, and the top end of the backrest support column 304 is used to abut against the surface of the backrest 1. The abutting position is specifically one end of the backrest 1 surface (i.e., the back side of the backrest 1 contacting the human body) close to the front support member 301. One end of the backrest folding member 8 is hinged to the backrest support column 304, and the hinge position is preferably located at the lower half of the backrest support column 304. The other end of the backrest folding member 8 is hinged to the middle of the backrest 1 surface.

[0044] The sliding adjustment frame 5 includes a sliding member 501, a backrest support member 502 and a seat support member 503. The sliding member 501 is slidably connected to the linear slide rail 303, and the linear slide rail 303 and the sliding member 501 are locked by a locking mechanism. One end of the backrest support member 502 is fixedly connected to one end of the sliding member 501 close to the front support member 301, and the other end of the backrest support member 502 is hinged to the surface of the backrest 1, and the hinge position is the end of the surface of the backrest 1 close to the rear support member 302. One end of the seat support member 503 is fixedly connected to one end of the sliding member 501 close to the rear support member 302, and the other end of the seat support member 503 is hinged to the surface of the seat 2 (the back side of the seat 2 contacting the human body), and the hinge position is the end of the surface of the seat 2 close to the front support member 301. One end of the folding seat member 9 is hinged to the front support member 301 , and the other end of the folding seat member 9 is hinged to the middle part of the seat 2 facing the ground.

[0045] The seat support frame 4 includes a seat support column 401 and a folding connector 402. The bottom of the seat support column 401 is used to abut against the ground, and the top of the seat support column 401 is hinged to the ground surface of the seat 2, and the hinge position is the end of the ground surface of the seat 2 away from the front support member 301. One end of the folding connector 402 is hinged to the seat support column 401, preferably hinged to the middle part, and the other end of the folding connector 402 is hinged to the backrest support member. The folding connector 402 and the seat folding member 9 are staggered to avoid mutual interference when the two rotate.

[0046] After such arrangement, the seat 2 and the backrest 1 are located above the linear slide rail 303, and the seat 2 and the backrest 1 are arranged in sequence from the front support 301 to the rear support 302, and the end of the seat 2 close to the front support 301 and the end of the backrest 1 close to the front support 301 are arranged at a distance that allows the seat 2 and the backrest 1 to not interfere with each other during the rotation adjustment process.

[0047] Working principle:

[0048] In a normal state, the seat 2 and the backrest 1 are usually in a flat lying state. Figure 1 and Figure 8 As shown, the included angles between the bench 2 and the backrest 1 and the ground are both 0°.

[0049] When the seat bench 2 and the backrest 1 need to be folded and their angles need to be adjusted, the locking mechanism is first unlocked, and then the sliding adjustment frame 5 is pulled toward the rear support member 302. The sliding member 501 will move along the linear slide rail 303 toward the rear support member 302, driving the backrest support member 502 and the seat bench support 503 to move toward the rear support member 302 at the same time. The backrest folding member 8 will rotate around the rear support member 302 toward the rear support member 302, and the seat bench folding member 9 will rotate around the front support member 301 toward the rear support member 302. Then the backrest folding member 8 will push the backrest 1 upward, and the backrest 1 rotates around the backrest support 501 toward the front support member 301, and the seat bench folding member 9 will push the seat bench 2 upward, and the seat bench 2 rotates around the seat bench support 502 toward the rear support member 302, so that the backrest 1 and the seat bench 2 can be folded upward in conjunction. For the folding process, refer to Fig.11 As shown (the arrow direction indicates the changing order), the sliding member 501 is stopped at the corresponding angle according to the folding angle of the seat 2 and the backrest 1 that one needs, and locked by the locking mechanism, as shown in FIG. Figure 2 and Figure 3 As shown, when the backrest 1 is 20°, Fig.10 As shown, the backrest 1 is at 70° and the seat 2 is at 25°.

[0050] Preferably, the angle adjustment range of the seat 2 is set at 0° to 25°, and the angle adjustment range of the backrest 1 is set at 0° to 75°, which can meet the angles required for most common functions of users to meet the training needs of different users.

[0051] In this embodiment, Figures 1 to 11 As shown, the linear guide rail 303 can be a square tube, and the corresponding sliding component 501 is a sliding sleeve, which is arranged on the square tube for sliding.

[0052] In this embodiment, Figures 1 to 11 As shown, the locking mechanism includes a rotating handle 6, a spring locking mechanism 7 and an adjustment locking hole 305. The rotating handle 6 is rotatably connected to the middle of the backrest support 502 through a handle shaft 601, and the handle shaft 601 is horizontally arranged. A plurality of adjustment locking holes 305 are arranged at intervals along the extension direction of the linear slide 303, and each adjustment locking hole 305 corresponds to a preset angle. Starting from the direction from the front support 301 to the rear support 302, the preset angle corresponding to the adjustment locking hole 305 gradually increases, and when increasing, it is preferably increased by an integer multiple. The specific increase value can be set as needed, such as 0°, 10°, 20°, 30°, increasing by +10° in sequence, or 0°, 5°, 10°, 15°, increasing by +5° in sequence.

[0053] The spring locking mechanism 7 includes a pull rod 701, a lock shaft 702, a compression spring 703, a spring sleeve 704, a stopper 705, and a pull rod connector 707. The backrest support 502 is a square tube, and the spring sleeve 704 is coaxially fixedly connected in the backrest support 502. Preferably, a mounting hole can be opened on the backrest support 502, and a sleeve mounting frame 712 is bolted to the mounting hole, and the spring sleeve 704 is fixedly connected to the sleeve mounting frame 712. The stopper 705 is fixedly connected to the top opening of the spring sleeve 704, and the stopper 705 is provided with a guide hole 706, and the lock shaft 702 is slidably sleeved in the guide hole 706. One end of the pull rod 701 is fixedly connected to the peripheral wall of the handle shaft 601 through the pull rod connector 707, and the other end of the pull rod 701 is hinged to one end of the lock shaft 702 through a hinge bolt 711. The pull rod 701 and the pull rod connector 707 are fixedly connected by a locking nut 710. A plug 708 is fixedly connected to the other end of the lock shaft 702, and a plug hole is provided on the sliding sleeve (sliding member 501), and the plug hole is used for the plug 708 to extend in and out. The plug hole can correspond to the adjustment locking hole 305 on the moving path of the sliding sleeve, so that the plug 708 can extend into the adjustment locking hole 305 corresponding to the plug hole through the plug hole, so as to achieve the locking between the sliding sleeve (sliding member 501) and the linear slide rail 303. The lock shaft 702 is coaxially fixedly connected to the sliding block 709 that is slidably connected to the spring sleeve 704, and the compression spring 703 is sleeved on the lock shaft 702, and the compression spring 703 is located between the limit block 705 and the sliding block 709.

[0054] Working principle:

[0055] The rotating handle 6 is rotated backward (toward the rear support member 302), and the handle shaft 601 rotates to lift the pull rod 701, which drives the lock shaft 702 to move upward along the spring sleeve 704, and the sliding block 709 compresses the compression spring 703 toward the limit block 705 until the plug 708 is completely out of the adjustment locking hole 305, and the unlocking is completed. Figure 5 and Fig. 9 Then, the rotating handle 6 is pulled backward (toward the rear support member 302), and the sliding sleeve (sliding member 501) can be driven along the linear slide rail 303 to realize the folding of the backrest 1 and the seat 2, as shown in FIG. Fig.11 As shown, after finding the appropriate angle, that is, after the adjustment locking hole 305 corresponding to the angle corresponds to the plug hole of the sliding sleeve, the rotating handle 6 is released, and under the reset force of the compression spring 703, the sliding block 709 is pushed to move away from the limit block 705, thereby driving the lock shaft 702 and the pull rod 701 to move downward, and the plug 708 is inserted into the adjustment locking hole 305 corresponding to the plug hole at this time, and the rotating handle 6 is reset to achieve locking, and the adjustment is completed. Figure 3 , Figure 4 as well as Figure 5 shown.

[0056] In order to facilitate adjustment, in this embodiment, Figures 1 to 11 As shown, the linear slide rail 303 is marked with angle marks corresponding to the adjustment locking holes 305, such as 0°, 10°, 20°, 30°...70°, which mainly correspond to the adjustment angle of the backrest 1. The sliding sleeve (sliding component 501) is provided with a revealing window 505, which can reveal the angle marks on the linear slide rail 303 one by one. That is, when the revealing window 505 reveals 10°, the plug hole just corresponds to the adjustment locking hole 305 that allows the backrest 1 to be adjusted to 10°. It should be noted that if the adjustment locking holes 305 are gradually increased by a fixed number, in fact, the spacing between the adjustment locking holes 305 is also gradually increased. Therefore, when marking each angle mark, the spacing between the angle marks should also be gradually increased. Moreover, because the backrest support 502 is arranged tilted as a whole, the angle mark should actually be marked closer to the front (towards the front support 301) than the corresponding adjustment locking hole 305, so that when the exposed window 505 moves to the corresponding angle mark, the plug hole just corresponds to the corresponding adjustment locking hole 305, as shown in the reference figure. Figure 4 and Figure 5 shown.

[0057] In order to make it easier to pull the rotating handle 6 when the folding stool 2 and the backrest 1 are folded, in this embodiment, Figures 1 to 11 As shown, a pull-up handle 10 is provided on the seat support column 401. When pulling the rotating handle 6 after sitting, the pull-up handle 10 is pulled up, which can reduce the force required for pulling the rotating handle 6 backward and make the sliding component 501 easier to slide.

[0058] In this embodiment, Figures 1 to 11 As shown, there are two folding seat members 9, which are spaced apart from each other, and the folding connector 402 is located between the two folding seat members 9 to avoid mutual influence between the folding connector 402 and the folding seat members 9 during rotation.

[0059] In this embodiment, Figures 1 to 11 As shown, the back support 502 and the seat support 503 are tilted on the sliding member 501, and the tilt direction is toward the front support 301. The back support 502 and the seat support 503 are connected by a reinforcement 504 to improve the load-bearing capacity of the back support 502 and the seat support 503.

[0060] Further, in this embodiment, if Figures 1 to 11As shown, the bench 2 includes a seat cushion 201 and a seat cushion mounting frame 202, the seat cushion 201 is mounted on the seat cushion mounting frame 202, and the seat cushion mounting frame 202 is hinged with the bench support column 401, the bench support member 503 and the bench folding member 9. Preferably, the seat cushion 201 can be a leather seat cushion filled with sponge, etc. The backrest 1 includes a back cushion 101 and a back cushion mounting frame 102, the back cushion 101 is mounted on the back cushion mounting frame 102, and the back cushion mounting frame 102 is hinged with the back support column 304 and the back folding member 8. Preferably, the back cushion 101 can be a leather back cushion filled with sponge, etc.

[0061] Further, in this embodiment, if Figures 1 to 11 As shown, one end of the seat cushion 201 close to the front support member 301 and one end of the back cushion 101 close to the front support member 301 are both arc-shaped, leaving a rotation space for the seat cushion 201 and the back cushion 101 to rotate.

[0062] In this embodiment, Figures 1 to 11 As shown, the rear support member 302 is provided with a running wheel 11. When the linkage folding dumbbell bench is moved, the linkage folding dumbbell bench needs to be lifted so that the running wheel 11 touches the ground, and the running wheel 11 can be moved. Normally, the running wheel 11 does not touch the ground. The front support member 301 and the rear support member 302 are both in the shape of a horizontal tube, and the linear slide rail 303 and the front support member 301 and the rear support member 302 are in the shape of an I-beam as a whole.

[0063] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A linkage folding dumbbell bench, characterized in that: It includes a backrest, a seat, a backrest support frame, a seat support frame, a sliding adjustment frame, a backrest folding part and a seat folding part; The backrest support frame includes a front support member, a rear support member and a linear slide rail, the linear slide rail is horizontally arranged on the ground through the front support member and the rear support member, the front support member and the rear support member are respectively fixedly connected to two ends of the linear slide rail, the extension direction of the linear slide rail is the same as the length direction of the backrest and the bench, the rear support member is fixedly connected with a backrest support column for abutting against the surface of the backrest near one end of the front support member, one end of the backrest folding member is hinged to the backrest support column, and the other end of the backrest folding member is hinged to the middle part of the surface of the backrest; The sliding adjustment frame includes a sliding member, a backrest support member and a seat support member, the sliding member is slidably connected to the linear slide rail, the linear slide rail and the sliding member are locked by a locking mechanism, one end of the backrest support member is fixedly connected to one end of the sliding member close to the front support member, the other end of the backrest support member is hinged to one end of the backrest surface close to the rear support member, one end of the seat support member is fixedly connected to one end of the sliding member close to the rear support member, the other end of the seat support member is hinged to one end of the seat surface close to the front support member, one end of the seat folding member is hinged to the front support member, and the other end of the seat folding member is hinged to the middle part of the seat surface; The seat support frame includes a seat support column with a bottom for contacting the ground and a folding connection member staggered with the seat folding member, the top of the seat support column is hinged to one end of the seat facing the ground away from the front support member, one end of the folding connection member is hinged to the seat support column, and the other end of the folding connection member is hinged to the backrest support member; An end of the bench close to the front support member and an end of the backrest close to the front support member are arranged at a distance.

2. The linkage folding dumbbell bench according to claim 1, characterized in that: The linear slide rail is a square tube, and the sliding component is a sliding sleeve sleeved on the square tube.

3. The linkage folding dumbbell bench according to claim 2, characterized in that: The locking mechanism includes a rotating handle, a spring locking mechanism and an adjustable locking hole; the rotating handle is rotatably connected to the middle part of the backrest support through a handle shaft, and the handle shaft is horizontally arranged; the adjustable locking holes are arranged at intervals along the extension direction of the linear slide rail; the spring locking mechanism includes a pull rod, a locking shaft, a compression spring and a spring sleeve, the backrest support is a square tube, the spring sleeve is tilted and fixedly connected to the backrest support, the top opening of the spring sleeve is fixedly connected to a limiting block, the limiting block is provided with a guide hole, and the locking shaft sliding sleeve It is arranged in the guide hole; one end of the pull rod is fixedly connected to the handle shaft through a pull rod connecting piece; the other end of the pull rod is hinged to one end of the lock shaft, and the other end of the lock shaft is fixedly connected with a plug, and the sliding sleeve is provided with a plug hole for the plug to extend in and out, and the plug hole can correspond one-to-one with the adjustment locking hole on the moving path of the sliding sleeve; the lock shaft is coaxially fixedly connected to a sliding block slidably connected to the spring sleeve, and the compression spring sleeve is arranged on the lock shaft, and the compression spring is located between the limit block and the sliding block.

4. The linkage folding dumbbell bench according to claim 3, characterized in that: The linear slide rail is marked with angle marks corresponding to the adjustment locking holes one by one, and the sliding sleeve is provided with a revealing window for revealing the angle marks.

5. The linkage folding dumbbell bench according to claim 3, characterized in that: A pull-up handle is provided on the bench support column.

6. The linkage folding dumbbell bench according to claim 1, characterized in that: It comprises two seat folding parts which are arranged at a distance, and the folding connecting part is located between the two seat folding parts.

7. The linkage folding dumbbell bench according to claim 1, characterized in that: The backrest support component and the seat support component are connected via a reinforcement component.

8. The linkage folding dumbbell bench according to claim 1, characterized in that: The seat bench includes a seat cushion and a seat cushion mounting frame, the seat cushion is mounted on the seat cushion mounting frame, and the seat cushion mounting frame is hinged to the seat bench support column, the seat bench support member and the seat bench folding member; the backrest includes a back cushion and a back cushion mounting frame, the back cushion is mounted on the back cushion mounting frame, and the back cushion mounting frame is hinged to the backrest support column and the backrest folding member.

9. The linkage folding dumbbell bench according to claim 8, characterized in that: One end of the seat cushion close to the front support member and one end of the back cushion close to the front support member are both arc-shaped ends.

10. The linkage folding dumbbell bench according to claim 1, characterized in that: The rear support is provided with walking wheels.

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