Head adjustable dumbbell bench

Abstract

The utility model provides a kind of head adjustable dumbbell bench, including chassis, the side hinged of chassis is equipped with cushion support frame, and cushion support frame is equipped with cushion, the other side hinged of chassis is equipped with backrest support frame, and backrest support frame is equipped with backrest, and the end hinged of backrest support frame away from cushion is equipped with headrest support frame, and headrest support frame is equipped with headrest.The utility model is connected by setting headrest support frame and backrest support frame hinged connection, so that headrest angle adjustable relative to backrest, can satisfy the use demand of different training, and headrest will not cause obstruction or interference to the head of trainer, training is convenient, and training action is rich.The utility model belongs to fitness equipment technical field.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and in particular to a dumbbell bench with an adjustable head. Background Technology

[0002] A dumbbell bench is a fitness aid, typically consisting of an adjustable seat platform and a sturdy frame base. Its core function is to provide a stable and safe support platform for users to perform various upper body and core training exercises using dumbbells, kettlebells, or body weight, such as bench press, shoulder press, triceps extensions, rows, flyes, and sit-ups. Dumbbell benches are widely applicable, including home gyms, professional fitness clubs, and athlete training facilities. Due to the versatility of its exercises, relatively small space requirements, and ability to effectively enhance training results and safety, the dumbbell bench remains one of the most popular and widely used fitness equipment worldwide.

[0003] Traditional adjustable dumbbell benches have a fixed backrest and headrest, limiting their functionality to flat bench presses and incline bench presses. When performing barbell or dumbbell shoulder presses or bicep curls, the headrest, integrated with the backrest, obstructs the head's movement, preventing it from tilting back. Similarly, when performing barbell, dumbbell, or cable back raises or preacher chair bicep curls, the headrest, integrated with the backrest, again obstructs the head's movement. In short, the integrated headrest causes numerous head-restrictions, hindering training and limiting the range of exercises that can be performed. Therefore, a dumbbell bench with an adjustable headrest angle is needed. Utility Model Content

[0004] The purpose of this application is to provide a dumbbell bench with an adjustable headrest, which aims to solve the technical problems of existing dumbbell benches where the headrest angle cannot be adjusted, causing many interferences to the head, resulting in inconvenience in training and a limited number of training movements.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: an adjustable dumbbell bench is provided, including a base frame, a seat support frame is hinged to one side of the base frame, a seat cushion is provided on the seat support frame, a backrest support frame is hinged to the other side of the base frame, a backrest is provided on the backrest support frame, and a headrest support frame is hinged to the end of the backrest support frame away from the seat cushion, and a headrest is provided on the headrest support frame.

[0006] In one embodiment, the backrest support frame is provided with an angle adjustment plate, the angle adjustment plate is provided with a plurality of circumferentially distributed headrest adjustment holes, the headrest support frame is provided with a headrest fixing hole, the headrest fixing hole is used in conjunction with the headrest adjustment hole, and a first fixing member is inserted into the headrest fixing hole and the headrest adjustment hole.

[0007] In one embodiment, the angle adjustment disc is provided with a first angle mark, which corresponds one-to-one with the headrest adjustment hole.

[0008] In one embodiment, the backrest support frame is provided with an elbow support fixing frame, and an elbow support is movably connected to the elbow support fixing frame; the elbow support fixing frame is provided with a plurality of elbow support mounting holes, and the elbow support is provided with an elbow support mounting rod, which is inserted into the elbow support mounting hole.

[0009] In one embodiment, the elbow support fixing frame is further provided with a plurality of elbow support adjustment holes, the elbow support is provided with an elbow support fixing plate, the elbow support fixing plate is provided with elbow support fixing holes, the elbow support fixing holes are used in conjunction with the elbow support adjustment holes, and a second fixing member is inserted into the elbow support fixing holes and the elbow support adjustment holes.

[0010] In one embodiment, the base frame is an inverted V-shaped structure composed of a first leg and a second leg, the length of the first leg being less than the length of the second leg; the seat support frame is provided with a first seat rotating frame, one end of which is hinged to the top of the base frame, and the seat is placed on the first seat rotating frame; a second seat rotating frame is hinged to the first seat rotating frame, and a seat fixing rod is provided on the second seat rotating frame; a seat adjusting frame is slidably connected to the first leg, and the seat adjusting frame is provided with a plurality of seat adjusting grooves, in which the seat fixing rod is placed; the seat adjusting frame is provided with a second angle mark, which corresponds one-to-one with the seat adjusting groove.

[0011] In one embodiment, the first leg is provided with a plurality of seat adjustment holes, the seat adjustment frame is provided with seat fixing holes, the seat adjustment holes and the seat fixing holes are used in conjunction, and a third fixing member is inserted into the seat adjustment holes and the seat fixing holes.

[0012] In one embodiment, the backrest support frame is provided with a first backrest rotating frame, one end of which is hinged to the top of the base frame. The backrest, angle adjustment plate, and elbow support fixing frame are all mounted on the first backrest rotating frame, and the headrest support frame is hinged to the first backrest rotating frame. A second backrest rotating frame is hinged to the first backrest rotating frame, and a backrest fixing rod is provided on the second backrest rotating frame. A backrest adjustment frame is slidably connected to the second support leg. The backrest adjustment frame is provided with a plurality of backrest adjustment grooves, and the backrest fixing rod is placed in the backrest adjustment grooves. A third angle mark is provided on the backrest adjustment frame, and the third angle mark corresponds one-to-one with the backrest adjustment groove.

[0013] In one embodiment, the second leg is provided with a plurality of backrest adjustment holes, the backrest adjustment frame is provided with backrest fixing holes, the backrest adjustment holes and the backrest fixing holes are used in conjunction, and a fourth fixing member is inserted into the backrest adjustment holes and the backrest fixing holes.

[0014] In one embodiment, the outer end of the second leg is provided with a fixing frame, an adjusting rod is slidably connected to the fixing frame, and a support plate is provided at the top of the adjusting rod; the adjusting rod is provided with a plurality of support plate adjusting holes, the fixing frame is provided with support plate fixing holes, the support plate fixing holes and the support plate adjusting holes are used in conjunction, and a fifth fixing member is inserted into the support plate fixing holes and the support plate adjusting holes.

[0015] This invention provides a dumbbell bench with an adjustable headrest. Compared with existing technologies, its advantages are as follows: by setting a headrest support frame and a backrest support frame that are hinged together, the angle of the headrest relative to the backrest can be adjusted to meet different training needs. Furthermore, the headrest will not obstruct or interfere with the trainee's head, making training convenient and allowing for a variety of exercises. This invention has a simple structure, is easy to operate, has a simple adjustment method, is convenient to use, highly flexible, and highly practical. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram (a) of a head-adjustable dumbbell bench provided in an embodiment of this application; Figure 2 for Figure 1 The structural diagram of the head-adjustable dumbbell bench shown is (II). Figure 3 for Figure 2 A partially enlarged structural diagram of the head-adjustable dumbbell bench shown; Figure 4 for Figure 1 The structural diagram of the head-adjustable dumbbell bench shown is (III). Figure 5 for Figure 4 An enlarged structural diagram of point A on the head-adjustable dumbbell bench shown; Figure 6 for Figure 1 The structural diagram of the head-adjustable dumbbell bench shown is (IV); Figure 7 for Figure 1 The diagram shows the structure of the adjustable head dumbbell bench in use (I). Figure 8 for Figure 1 The diagram shows the structure of the adjustable head dumbbell bench in use (II).

[0018] Explanation of symbols in the diagram: 1. Base frame; 101. First leg; 102. Second leg; 2. Seat cushion support frame; 201. First seat cushion rotating frame; 202. Second seat cushion rotating frame; 203. Seat cushion fixing rod; 204. Seat cushion adjusting frame; 205. Seat cushion adjusting groove; 206. Seat cushion adjusting hole; 207. Seat cushion fixing hole; 3. Seat cushion; 4. Backrest support frame; 401. First backrest rotating frame; 402. Second backrest rotating frame; 403. Backrest fixing rod; 404. Backrest adjusting frame; 405. Backrest adjusting groove; 406. Backrest adjusting hole; 407. Backrest fixing hole; 408. Adjusting handle; 5. Backrest; 6. Headrest support frame; 7. Headrest; 8. Angle adjustment dial; 9. Headrest adjustment hole; 10. Headrest fixing hole; 11. First fixing component; 12. Elbow support fixing frame; 13. Elbow support; 14. Elbow support mounting hole; 15. Elbow support mounting rod; 16. Elbow support adjustment hole; 17. Elbow support fixing plate; 18. Elbow support fixing hole; 19. Second fixing component; 20. Third fixing component; 21. Fourth fixing component; 22. Fixture; 2201. Vertical bar; 2202. Horizontal bar; 23. Adjusting rod; 24. Support plate; 25. Support plate adjusting hole; 26. Support plate fixing hole; 27. Fifth fixing component. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] It should be noted that when a component is referred to as being "fixed" or "set" to another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected" to another component, it can be directly or indirectly connected to that other component.

[0021] It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and should not be construed as indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Please see Figure 1 This is a schematic diagram (I) of a dumbbell bench with an adjustable head, provided in one embodiment of this application. For ease of explanation, only the parts relevant to this embodiment are shown, and are described in detail below: In one embodiment, a head-adjustable dumbbell bench includes a base frame 1, a seat support frame 2 hinged to one side of the base frame 1, a seat cushion 3 provided on the seat support frame 2, a backrest support frame 4 hinged to the other side of the base frame 1, a backrest 5 provided on the backrest support frame 4, and a headrest support frame 6 hinged to the end of the backrest support frame 4 away from the seat cushion 3, with a headrest 7 provided on the headrest support frame 6.

[0023] This invention features a headrest support frame 6 hinged to a backrest support frame 4, allowing the headrest 7 to be adjusted relative to the backrest 5 at an adjustable angle. This caters to diverse training needs without obstructing or interfering with the trainee's head, facilitating convenient training and enabling a variety of exercises. The invention boasts a simple structure, easy operation, and convenient adjustment, offering high flexibility and practicality.

[0024] For details, please refer to Figures 1-2 The base frame 1 is an inverted V-shaped structure composed of a first leg 101 and a second leg 102, with the length of the first leg 101 being shorter than the length of the second leg 102. The first leg 101 and the second leg 102 are firmly connected, forming a triangular support structure with the ground, improving the stability of the dumbbell bench. By setting the length of the first leg 101 to be shorter than the length of the second leg 102, which matches the lengths of the seat cushion 3 and the backrest 5 respectively, and by shifting the center of gravity of the entire dumbbell bench backward, it is suitable for heavy weight training.

[0025] Please see Figure 2 The seat support frame 2 is equipped with a first seat rotating frame 201, one end of which is hinged to the top of the base frame 1. The seat cushion 3 is mounted on the first seat rotating frame 201. A second seat rotating frame 202 is hinged to the first seat rotating frame 201. The second seat rotating frame 202 is equipped with a seat fixing rod 203. A seat adjusting frame 204 is slidably connected to the first support leg 101. The seat adjusting frame 204 is equipped with several seat adjusting grooves 205, and the seat fixing rod 203 is placed in the seat adjusting grooves 205. The several seat adjusting grooves 205 provide different tilt angles for the seat cushion 3.

[0026] Please see Figure 2The first leg 101 is provided with several seat adjustment holes 206, and the seat adjustment frame 204 is provided with seat fixing holes 207. The seat adjustment holes 206 and the seat fixing holes 207 are used in conjunction, and a third fixing member 20 is inserted into the seat adjustment holes 206 and the seat fixing holes 207. The third fixing member 20 fixes the seat adjustment frame 204.

[0027] By setting the seat support frame 2 to be hinged to the base frame 1, the seat 3 can be tilted relative to the base frame 1 to adjust the angle, which can meet the needs of different training and provide a variety of training movements.

[0028] In one embodiment, the seat adjustment bracket 204 is provided with a second angle mark, which corresponds one-to-one with the seat adjustment groove 205. The second angle mark makes it easy for the trainee to grasp the tilt angle of the seat 3 and to make adjustments.

[0029] Please see Figure 2 The backrest support frame 4 is provided with a first backrest rotating frame 401, one end of which is hinged to the top of the base frame 1. The backrest 5 is mounted on the first backrest rotating frame 401, and the headrest support frame 6 is hinged to the first backrest rotating frame 401. A second backrest rotating frame 402 is hinged to the first backrest rotating frame 401. The second backrest rotating frame 402 is provided with a backrest fixing rod 403. A backrest adjusting frame 404 is slidably connected to the second support leg 102. The backrest adjusting frame 404 is provided with several backrest adjusting grooves 405, and the backrest fixing rod 403 is placed in the backrest adjusting grooves 405. The several backrest adjusting grooves 405 provide different tilt angles for the backrest 5.

[0030] Please see Figure 2 The second leg 102 is provided with several backrest adjustment holes 406, and the backrest adjustment frame 404 is provided with backrest fixing holes 407. The backrest adjustment holes 406 and the backrest fixing holes 407 are used in conjunction, and a fourth fixing member 21 is inserted into the backrest adjustment holes 406 and the backrest fixing holes 407. The fourth fixing member 21 fixes the backrest adjustment frame 404.

[0031] By setting the backrest support frame 4 to be hinged to the base frame 1, the backrest 5 can be tilted relative to the base frame 1 to adjust the angle, which can meet the needs of different training and provide a variety of training movements.

[0032] In one embodiment, the backrest adjustment frame 404 is provided with a third angle mark, which corresponds one-to-one with the backrest adjustment groove 405. The third angle mark makes it easy for the trainee to grasp the tilt angle of the backrest 5 and to make adjustments.

[0033] In one embodiment, please refer to Figure 2The second backrest rotating frame 402 is provided with an adjustment handle 408, which can be used to adjust the second backrest rotating frame 402 more conveniently.

[0034] Please see Figures 2-3 The backrest support frame 4 is equipped with an angle adjustment disc 8, which is mounted on the first backrest rotating frame 401. The angle adjustment disc 8 has several circumferentially distributed headrest adjustment holes 9. The headrest support frame 6 has headrest fixing holes 10, which cooperate with the headrest adjustment holes 9. A first fixing member 11 is inserted into the headrest fixing hole 10 and the headrest adjustment hole 9. The first fixing member 11 fixes the headrest support frame 6.

[0035] In one embodiment, the angle adjustment disc 8 is provided with a first angle mark, which corresponds one-to-one with the headrest adjustment hole 9. The first angle mark makes it easy for the trainee to grasp the tilt angle of the headrest 7 and make adjustments.

[0036] In one embodiment, please refer to Figures 4-5 The backrest support frame 4 is equipped with an elbow support bracket 12, which is mounted on the first backrest rotating frame 401. An elbow support 13 is movably connected to the elbow support bracket 12. The elbow support bracket 12 has several elbow support mounting holes 14, and the elbow support 13 has an elbow support mounting rod 15, which is inserted into the elbow support mounting holes 14. The elbow support 13 provides support for the elbow, is suitable for training in various scenarios, and improves the diversity of movements. The several elbow support mounting holes 14 provide different mounting positions for the elbow support 13.

[0037] Please see Figures 4-5 The elbow support bracket 12 is also provided with several elbow support adjustment holes 16, and the elbow support 13 is provided with an elbow support fixing plate 17. The elbow support fixing plate 17 is provided with elbow support fixing holes 18. The elbow support fixing holes 18 are used in conjunction with the elbow support adjustment holes 16. A second fixing member 19 is inserted into the elbow support fixing holes 18 and the elbow support adjustment holes 16. The second fixing member 19 fixes the elbow support 13.

[0038] By setting the elbow support fixing bracket 12, the position of the elbow support 13 can be adjusted to meet the needs of different training.

[0039] In one embodiment, please refer to Figure 6The outer end of the second leg 102 is equipped with a fixing frame 22. The fixing frame 22 is a "⊥" shaped structure composed of a horizontal bar 2202 and a vertical bar 2201. An adjusting rod 23 is slidably connected to the fixing frame 22, and a support plate 24 is provided at the top of the adjusting rod 23. The adjusting rod 23 has several support plate adjusting holes 25, and the fixing frame 22 has support plate fixing holes 26. The support plate fixing holes 26 and the support plate adjusting holes 25 are used in conjunction, and a fifth fixing member 27 is inserted into the support plate fixing holes 26 and the support plate adjusting holes 25. The fixing frame 22 can improve the stability of the entire dumbbell bench. The fifth fixing member 27 fixes the adjusting rod 23, thereby fixing the position of the support plate 24. The support plate 24 is used to support the headrest support frame 6.

[0040] In one embodiment, please refer to Figures 1-6 The first fastener 11, the second fastener 19, the third fastener 20, the fourth fastener 21, and the fifth fastener 27 include pins, pull pins, or bolts, or other types of fasteners.

[0041] In one embodiment, please refer to Figures 1-6 The base frame 1, seat cushion support frame 2, backrest support frame 4, headrest support frame 6, elbow support fixing frame 12, fixing frame 22, adjusting rod 23, angle adjusting disc 8, elbow support mounting rod 15, support plate 24, first fixing component 11, second fixing component 19, third fixing component 20, fourth fixing component 21, and fifth fixing component 27 are all made of high-strength steel, such as carbon steel or alloy steel, which improves the load-bearing capacity of the dumbbell bench and prevents bending or breakage during use.

[0042] The following combination Figures 1-8 The working process of the head-adjustable dumbbell bench of this application is described as follows: When performing barbell, dumbbell, or cable back pulls, adjust the seat cushion 3 to a horizontal angle by adjusting the seat support frame 2, adjust the backrest 5 to a 45°–60° forward tilt by adjusting the backrest support frame 4, and adjust the headrest 7 to a 0°–10° forward tilt by adjusting the headrest support frame 6. Then, the trainee can sit on the seat cushion 3 with their legs apart and feet on the ground, lean their upper body forward on the backrest 5, and rest their head lightly on the front of the headrest 7, keeping their neck naturally straight and their gaze on the ground, avoiding looking up or down, and then perform barbell, dumbbell, or cable back pulls.

[0043] When performing barbell or dumbbell shoulder press exercises, adjust the seat cushion 3 to a 0°–5° recline by adjusting the seat support frame 2, adjust the backrest 5 to a 90° vertical position by adjusting the backrest support frame 4, and adjust the headrest 7 to a 30°–45° recline by adjusting the headrest support frame 6. Then, the trainee can sit on the seat cushion 3 with both feet flat on the ground, back against the backrest 5, head pressed against the headrest 7, neck relaxed, and eyes looking straight ahead, and perform dumbbell or barbell shoulder press movements.

[0044] When performing biceps curls, adjust the seat cushion 3 to a 10°–15° forward tilt by adjusting the seat support frame 2, adjust the backrest 5 to a 70°–80° forward tilt by adjusting the backrest support frame 4, and adjust the headrest 7 to a 0°–10° forward tilt by adjusting the headrest support frame 6. Then, the trainee can sit on the seat cushion 3 with knees slightly bent, upper body leaning against the backrest 5 to maintain an upright posture, head lightly resting on the front of the headrest 7, neck naturally neutral, and eyes looking at the hands to perform biceps curls.

[0045] When performing dumbbell or barbell preacher chair biceps curls, adjust the seat cushion 3 to a 15°–20° forward tilt using the seat support frame 2, adjust the backrest 5 to a 60°–70° forward tilt using the backrest support frame 4, and adjust the headrest 7 to be parallel to the backrest 5 using the headrest support frame 6. Insert the elbow supports 13 on both sides. The trainee can sit on the seat cushion 3, lean forward onto the backrest 5 with their chest pressed against the backrest 5, place their arms on the elbow supports 13, rest their chin lightly on the top of the headrest 7, slightly tuck their neck, and look down at their elbows to perform dumbbell or barbell biceps curls.

[0046] In summary, this utility model provides a dumbbell bench with an adjustable headrest. By hingedly connecting the headrest support frame and the backrest support frame, the angle of the headrest relative to the backrest can be adjusted to meet different training needs. The headrest does not obstruct or interfere with the trainee's head, making training convenient and allowing for a variety of exercises. This utility model has a simple structure, is easy to operate, has a simple adjustment method, is convenient to use, highly flexible, and highly practical. This utility model has wide applications in the field of fitness equipment technology.

[0047] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A head adjustable dumbbell bench comprising a chassis (1), characterized in that, A seat support frame (2) is hinged to one side of the base frame (1), and a seat cushion (3) is provided on the seat support frame (2). A backrest support frame (4) is hinged to the other side of the base frame (1), and a backrest (5) is provided on the backrest support frame (4). A headrest support frame (6) is hinged to the end of the backrest support frame (4) away from the seat cushion (3), and a headrest (7) is provided on the headrest support frame (6). The backrest support frame (4) is provided with an angle adjustment plate (8), the angle adjustment plate (8) is provided with a plurality of circumferentially distributed headrest adjustment holes (9), the headrest support frame (6) is provided with a headrest fixing hole (10), the headrest fixing hole (10) is used in conjunction with the headrest adjustment hole (9), and a first fixing member (11) is inserted into the headrest fixing hole (10) and the headrest adjustment hole (9).

2. The head adjustable dumbbell bench as recited in claim 1, wherein, The angle adjustment disc (8) is provided with a first angle mark, which corresponds one-to-one with the headrest adjustment hole (9).

3. The head adjustable dumbbell bench as recited in claim 1, wherein, The backrest support frame (4) is provided with an elbow support fixing frame (12), and an elbow support (13) is movably connected to the elbow support fixing frame (12); the elbow support fixing frame (12) is provided with a plurality of elbow support mounting holes (14), and the elbow support (13) is provided with an elbow support mounting rod (15), which is inserted into the elbow support mounting hole (14).

4. The head adjustable dumbbell bench as recited in claim 3, wherein, The elbow support fixing bracket (12) is also provided with a number of elbow support adjustment holes (16), the elbow support (13) is provided with an elbow support fixing plate (17), the elbow support fixing plate (17) is provided with an elbow support fixing hole (18), the elbow support fixing hole (18) is used in conjunction with the elbow support adjustment hole (16), and a second fixing member (19) is inserted into the elbow support fixing hole (18) and the elbow support adjustment hole (16).

5. The head adjustable dumbbell bench as recited in claim 3, wherein, The base frame (1) is an inverted V-shaped structure composed of a first leg (101) and a second leg (102), the length of the first leg (101) being less than the length of the second leg (102); the seat support frame (2) is provided with a first seat rotating frame (201), one end of the first seat rotating frame (201) being hinged to the top of the base frame (1), and the seat cushion (3) being disposed on the first seat rotating frame (201); a second seat cushion is hinged to the first seat rotating frame (201). The second seat cushion rotating frame (202) is provided with a seat cushion fixing rod (203), and a seat cushion adjusting frame (204) is slidably connected to the first support leg (101). The seat cushion adjusting frame (204) is provided with a plurality of seat cushion adjusting grooves (205), and the seat cushion fixing rod (203) is placed in the seat cushion adjusting grooves (205). The seat cushion adjusting frame (204) is provided with a second angle mark, and the second angle mark corresponds one-to-one with the seat cushion adjusting grooves (205).

6. The head adjustable dumbbell bench as recited in claim 5, wherein, The first support leg (101) is provided with a plurality of seat adjustment holes (206), and the seat adjustment frame (204) is provided with seat fixing holes (207). The seat adjustment holes (206) and the seat fixing holes (207) are used in conjunction. A third fixing member (20) is inserted into the seat adjustment holes (206) and the seat fixing holes (207).

7. The head adjustable dumbbell bench as recited in claim 5, wherein, The backrest support frame (4) is provided with a first backrest rotating frame (401), one end of which is hinged to the top of the base frame (1). The backrest (5), the angle adjustment plate (8), and the elbow support fixing frame (12) are all mounted on the first backrest rotating frame (401). The headrest support frame (6) is hinged to the first backrest rotating frame (401). A second backrest rotating frame (402) is hinged to the first backrest rotating frame (401). The second backrest rotating frame (402) is provided with a backrest fixing rod (403), and the second support leg (102) is slidably connected with a backrest adjusting frame (404). The backrest adjusting frame (404) is provided with a plurality of backrest adjusting grooves (405), and the backrest fixing rod (403) is placed in the backrest adjusting grooves (405). The backrest adjusting frame (404) is provided with a third angle mark, and the third angle mark corresponds one-to-one with the backrest adjusting grooves (405).

8. The head adjustable dumbbell bench as recited in claim 7, wherein, The second leg (102) is provided with a plurality of backrest adjustment holes (406), and the backrest adjustment frame (404) is provided with a backrest fixing hole (407). The backrest adjustment hole (406) and the backrest fixing hole (407) are used in conjunction. A fourth fixing member (21) is inserted into the backrest adjustment hole (406) and the backrest fixing hole (407).

9. The head-adjustable dumbbell bench as described in claim 5, characterized in that, The second leg (102) has a fixed frame (22) at its outer end. An adjusting rod (23) is slidably connected to the fixed frame (22). A support plate (24) is provided at the top of the adjusting rod (23). The adjusting rod (23) has several support plate adjusting holes (25). The fixed frame (22) has support plate fixing holes (26). The support plate fixing holes (26) are used in conjunction with the support plate adjusting holes (25). A fifth fixing member (27) is inserted into the support plate fixing holes (26) and the support plate adjusting holes (25).

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