Hand-pushing and foot-pedaling sit-up type body builder

Abstract

The invention discloses a hand-pushing and foot-pedaling sit-up type body builder, which relates to the field of body building equipment, can integrate the functions of the body builder for exercising the muscles of the two arms, the muscles of the legs and the muscles of the waist and the chest, occupies a small space indoors, and can be used for exercising the muscles of the two arms, the muscles of the legs and the muscles of the waist and the chest. The fitness equipment specifically comprises a supporting frame and a fitness seat, and the left side and the right side of the rear half part of the supporting frame are provided with double-arm push-back type driving balance weight devices which can exercise double-arm muscles; the left side and the right side of a vertical frame at the front end of the supporting frame are provided with double-pedal type driving balance weight devices, and leg muscles can be exercised. A sit-up device is formed by a body-building seat capable of being unfolded forwards above the rear half part of the supporting frame, a body-building seat backrest capable of being unfolded backwards behind the body-building seat and a foot fixing shaft on a vertical frame cross beam at the front end of the supporting frame, sit-up exercise can be conducted, and muscles of the waist and the chest can be exercised. And a front-end vertical frame of the support frame can be locked after synchronous front-and-back telescopic translation adjustment.

Description

Technical Field

[0001] The invention relates to the field of fitness equipment, in particular to a hand-pushing and foot-pedaling sit-up type fitness machine. Background Art

[0002] With the improvement of people's living standards and the acceleration of the pace of life, there is not enough time to go to professional fitness venues to exercise. Even if we go to professional fitness venues to exercise, it is difficult for ordinary people to afford the high fitness fees and it is difficult to persist in exercising in professional fitness venues for a long time. Therefore, ordinary people are suitable for purchasing indoor fitness equipment to exercise. However, there are many types of existing indoor fitness equipment, including those for exercising arm muscles, leg muscles, waist and chest muscles, and single functions. Due to limited indoor space, it is impossible to buy all these fitness equipment home and use them indoors. In view of this, research is conducted on the existing problems, and a fitness device is provided that can exercise arm muscles, leg muscles, waist and chest muscles. Summary of the invention

[0003] In view of the deficiency of single function in the background technology, the present invention provides a hand-pushing and foot-pedaling sit-up type fitness machine, which adopts a double-arm backward-pushing driving counterweight device to exercise the muscles of the arms, adopts a double-foot-pedaling driving counterweight device to exercise the leg muscles, and adopts a sit-up device to exercise the waist and chest muscles. The hand-pushing and foot-pedaling sit-up type fitness machine has the function of exercising the muscles of the arms, the legs, the waist and the chest muscles.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a hand-pushing and foot-pedaling sit-up type fitness machine, comprising a support frame and a fitness seat, wherein the left and right sides of the rear half of the support frame are provided with double-arm backward-pushing driving counterweight devices; the left and right sides of the front end vertical frame of the support frame are provided with double-foot-pedaling driving counterweight devices; the fitness seat which can be unfolded forward above the rear half of the support frame, the fitness seat backrest which can be unfolded backward behind the fitness seat, and the foot fixing shaft on the crossbeam of the front end vertical frame of the support frame constitute a sit-up device; the front end vertical frame of the support frame can be synchronously telescoped forward and backward and translated for adjustment and then locked.

[0005] Preferably, the double-arm rear-push driven counterweight device comprises a left rear driven counterweight tray which can rotate forward and backward on the left side of the rear half of the support frame, and a right rear driven counterweight tray which can rotate forward and backward on the right side of the rear half of the support frame, the left rear driven counterweight tray is equipped with a left rear weight group, the front side of the left rear driven counterweight tray bearing sleeve is the left rear driving arm, the connection between the left rear driving arm and the left driving rod is a left driving rod ball head connection, the front end of the left driving rod is equipped with a left driving handle, and the left driving handle has a left driving handle stop pad, the right rear driven counterweight tray is equipped with a right rear weight group, the front side of the right rear driven counterweight tray bearing sleeve is the right rear driving arm, the connection between the right rear driving arm and the right driving rod is a right driving rod ball head connection, the front end of the right driving rod is equipped with a right driving handle, and the right driving handle has a right driving handle stop pad.

[0006] Preferably, the double-pedal-type driven counterweight device comprises a left front driven counterweight tray which can rotate forward and backward on the left side of the front end frame of the support frame, and a right front driven counterweight tray which can rotate forward and backward on the right side of the front end frame of the support frame. The left front driven counterweight tray is equipped with a left front weight group, the rear side of the bearing sleeve of the left front driven counterweight tray is the left front driving arm, and the rear end of the left front driving arm is the left driving pedal. The right front driven counterweight tray is equipped with a right front weight group, the rear side of the bearing sleeve of the right front driven counterweight tray is the right front driving arm, and the rear end of the right front driving arm is the right driving pedal.

[0007] Preferably, the sit-up device comprises a fitness seat above the rear half of the support frame, the fitness seat can be flipped forward 180 degrees and unfolded, the bottom plate of the fitness seat will form a sit-up board with a lower front and higher back and a slight slope with the top plate of the support frame, the backrest of the fitness seat can be flipped backward and unfolded, and be on the same plane with the sit-up board with a lower front and higher back and a slight slope, there is a sit-up pillow on the backrest of the fitness seat, and there is a foot fixing shaft on the front end frame crossbeam of the support frame.

[0008] Preferably, the left rear drive counterweight tray is installed on the left side of the rear half of the support frame by cooperating with the left rear drive counterweight tray fixed shaft on the left side of the rear half of the support frame through the inner diameter of the bearing in the left rear drive counterweight tray bearing sleeve in front of the left rear drive counterweight tray, and the right rear drive counterweight tray is installed on the right side of the rear half of the support frame by cooperating with the right rear drive counterweight tray fixed shaft on the right side of the rear half of the support frame.

[0009] Preferably, the left front drive counterweight tray is installed on the left side of the front end upright of the support frame by cooperating with the left front drive counterweight tray fixed shaft on the left side of the front end upright of the support frame through the inner diameter of the bearing in the left front drive counterweight tray bearing sleeve behind the left front drive counterweight tray, and the right front drive counterweight tray fixed shaft on the right side of the front end upright of the support frame is installed on the right side of the front end upright of the support frame.

[0010] Preferably, the sit-up board in the sit-up device is formed by the fitness seat being flipped forward and unfolded by a fitness seat flip hinge, and is supported by a sit-up board supporting attachment frame movable at the front half of the support frame, and the fitness seat backrest behind the fitness seat is locked, can be opened and unfolded backward by a fitness seat backrest flip hinge, and is supported by a fitness seat backrest supporting attachment frame movable at the rear of the support frame.

[0011] Compared with the existing common fitness equipment for exercising arm muscles, leg muscles, waist and chest muscles, the hand-pushing and foot-pedaling sit-up type fitness equipment of the present invention has the following beneficial effects: it can integrate the functions of fitness equipment for exercising arm muscles, leg muscles, waist and chest muscles into one, occupies a small space indoors, and can exercise arm muscles, leg muscles, waist and chest muscles, so that people can selectively complete the beneficial effects of exercising arm muscles, leg muscles, waist and chest muscles at home at any time with one fitness equipment, is economical and applicable, and is suitable for ordinary people to persist in exercising at home for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of a hand-pushing and foot-pedal sit-up type fitness machine of the present invention;

[0013] Figure 2 The present invention is a schematic diagram of the structure of a sit-up device of a hand-pushing and foot-pedal sit-up type fitness machine.

[0014] Legend: 1. Support frame; 2. Fitness seat; 3. Front stand of support frame; 4. Fitness seat backrest; 5. Left rear drive weight tray; 6. Right rear drive weight tray; 7. Left rear weight set; 8. Bearing sleeve of left rear drive weight tray; 9. Left rear drive arm; 10. Left drive rod; 11. Ball head of left drive rod; 12. Left drive handle; 13. Pad of left drive handle; 14. Right rear weight set; 15. Bearing sleeve of right rear drive weight tray; 16. Right rear drive arm; 17. Right drive rod; 18. Ball head of right drive rod; 19. Right drive handle; 20. Pad of right drive handle; 21. Left front drive weight tray; 22. Right front drive weight tray; 23. Left front weight set; 24. Left front drive weight tray 1. The first part of the support frame is provided with a plurality of support legs, a plurality of support legs and a plurality of support legs, and a plurality of support legs are provided with a plurality of support legs. The first part of the support frame is provided with a plurality of support legs, a plurality of support legs and a plurality of support legs, and a plurality of support legs are provided with a plurality of support legs. The first part of the support frame is provided with a plurality of support legs, a plurality of support legs and a plurality of support legs, and a plurality of support legs are provided with a plurality of support legs. The first part of the support frame is provided with a plurality of support legs, a plurality of support legs and a plurality of support legs, and a plurality of support legs are provided with a plurality of support legs. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making improvements and creative labor are within the scope of protection of the present invention. In the paragraphs for detailed description, the nouns involved in the various directions are only for the convenience of technicians in this field to understand the technical solutions recorded in this application according to the visual directions shown in the drawings. The terms "setting", "installation", "connection" and the like should be understood in a broad sense. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0016] See also Figure 1As shown in ---2, a hand-pushing and foot-pedaling sit-up fitness machine comprises a support frame 1 and a fitness seat 2. The left and right sides of the rear half of the support frame 1 are provided with a double-arm backward-pushing driving counterweight device, which can exercise the arm muscles by holding the left driving handle 12 and the right driving handle 19 with both hands, raising and lowering the hands and pushing the arms backward with force. The left and right sides of the front stand 3 of the support frame are provided with a left driving pedal 26 and a right driving pedal 30 with both feet, and the legs can be pressed forward with force. The left and right sides of the front stand 3 of the support frame can exercise the arm muscles by placing the left and right driving pedals 26 and the right driving pedals 30 with both feet, and the legs can be pressed forward with force. The double-foot pedaling-type weight-bearing device driven by gravity when standing up can exercise the leg muscles; the fitness seat 2 that can be unfolded forward on the upper part of the rear half of the support frame 1, the fitness seat backrest 4 that can be unfolded backward behind the fitness seat 2, and the foot fixing shaft 36 on the front end vertical frame cross beam 35 of the support frame constitute a sit-up device, which can do sit-ups and exercise the waist and chest muscles; the front end vertical frame 3 of the support frame can be synchronously telescoped forward and backward and translated and locked after adjustment, and the appropriate distance when the double feet step on the left driving pedal 26 and the right driving pedal 30, or the appropriate distance when the double feet hook the foot fixing shaft 36 on the front end vertical frame cross beam 35 of the support frame can be adjusted.

[0017] As a technical optimization scheme of the present invention, the double-arm rear-push driven counterweight device comprises a left rear-driven counterweight tray 5 which can rotate forward and backward on the left side of the rear half of the support frame 1, and a right rear-driven counterweight tray 6 which can rotate forward and backward on the right side of the rear half of the support frame 1. The left rear-driven counterweight tray 5 is equipped with a left rear weight group 7, and the weights in the left rear weight group 7 can be increased or decreased according to the intensity of exercise. The front side of the left rear-driven counterweight tray bearing sleeve 8 is the left rear driving arm 9, and the connection between the left rear driving arm 9 and the left driving rod 10 is the left driving rod ball head 11, which ensures that the left driving rod 10 can move left and right, forward and backward without being affected by the left arm's backward push and the change in the angle of the left rear driving arm 9, and can rise and fall normally. The front end of the left driving rod 10 is equipped with a left driving arm 9. The left driving handle 12 has a left driving handle stopper 13, and the left driving handle stopper 13 ensures that the left hand does not slide backward when the left arm pushes backward with force while the left hand holds the left driving handle 12. The right rear driving counterweight tray 6 is equipped with a right rear weight group 14, and the front side of the right rear driving counterweight tray bearing sleeve 15 is a right rear driving arm 16, and the connection between the right rear driving arm 16 and the right driving rod 17 is a right driving rod ball head 18. The front end of the right driving rod 17 is equipped with a right driving handle 19, and the right driving handle 19 has a right driving handle stopper 20. Tension springs can also be installed between the bottom of the left rear driving counterweight tray 5 and the right rear driving counterweight tray 6 and the left and right sides of the rear half of the support frame 1 to increase the driving force of both arms.

[0018] Specifically, the user sits on the fitness seat 2, with his back against the fitness seat backrest 4, and holds the left driving handle 12 and the right driving handle 19 with both hands, and lifts and lowers his hands, and pushes back and forth with both arms. When the left rear driving weight tray 5 and the right rear driving weight tray 6 are stressed, the left rear driving weight tray fixed shaft 37 and the right rear driving weight tray fixed shaft 38 are lifted up, so that the left rear driving weight tray fixed shaft 37 and the right rear driving weight tray fixed shaft 38 are lifted up, and ... The arms bear the gravity of the left rear weight group 7 and the right rear weight group 14, and the hands are raised, and the left rear weight group 7 in the left rear driving counterweight tray 5 and the right rear weight group 14 in the right rear driving counterweight tray 6 will fall with the left rear driving counterweight tray fixed shaft 37 and the right rear driving counterweight tray fixed shaft 38 as fulcrums, so that the arms do not bear the gravity of the left rear weight group 7 and the right rear weight group 14, which provides the necessary conditions for the arms to push back and forth backward with force to bear the gravity, thereby achieving the purpose of exercising the arm muscles.

[0019] As a technical optimization scheme of the present invention, the double-foot pedal-type driven counterweight device includes a left front driven counterweight tray 21 that can rotate forward and backward on the left side of the front end frame 3 of the support frame, and a right front driven counterweight tray 22 that can rotate forward and backward on the right side of the front end frame 3 of the support frame. The left front driven counterweight tray 21 is equipped with a left front weight group 23, and the rear side of the left front driven counterweight tray bearing sleeve 24 is the left front driving arm 25, and the rear end of the left front driving arm 25 is the left driving pedal 26. The right front driven counterweight tray 22 is equipped with a right front weight group 27, and the rear side of the right front driven counterweight tray bearing sleeve 28 is the right front driving arm 29, and the rear end of the right front driving arm 29 is the right driving pedal 30. Tension springs can also be installed between the bottom of the left front driven counterweight tray 21 and the right front driven counterweight tray 22 and the lower half of the left and right sides of the front end frame 3 of the support frame to increase the driving force of both legs.

[0020] Specifically, the user sits on the fitness seat 2, with his back against the fitness seat backrest 4, and his feet placed on the left driving pedal 26 and the right driving pedal 30, and pedals forward reciprocatingly with his legs. When the left front driving weight tray 21 and the right front driving weight tray 22 are subjected to force, the left front driving weight tray fixed shaft 39 and the right front driving weight tray fixed shaft 40 are used as fulcrums to lift the left front driving weight tray fixed shaft 39 and the right front driving weight tray fixed shaft 40 upward, so that the legs are supported by the left front driving arm 25 and the right front driving arm 29. The weight of the front weight group 23 and the right front weight group 27 causes the legs to bend back, and the left front weight group 23 in the left front driving counterweight tray 21 and the right front weight group 27 in the right front driving counterweight tray 22 will fall with the left front driving counterweight tray fixed shaft 39 and the right front driving counterweight tray fixed shaft 40 as fulcrums, so that the legs are not subjected to the weight of the left front weight group 23 and the right front weight group 27, which provides the necessary conditions for the legs to exert force to pedal forward reciprocatingly with the feet and bear the gravity, thereby achieving the purpose of exercising the leg muscles.

[0021] As a technical optimization scheme of the present invention, the sit-up device includes a fitness seat 2 above the rear half of the support frame 1, and the fitness seat 2 can be flipped forward 180 degrees and unfolded, and the fitness seat bottom plate 31 will form a sit-up board 33 with a lower front and a higher rear and a slight slope with the support frame top plate 32. The fitness seat backrest 4 flips backward and unfolds, and is on the same plane with the sit-up board 33 with a lower front and a higher rear and a slight slope. There is a sit-up pillow 34 on the fitness seat backrest 4, and a foot fixing shaft 36 is provided on the front end vertical frame crossbeam 35 of the support frame.

[0022] Specifically, the fitness seat 2 is flipped forward 180 degrees and unfolded, and the fitness seat bottom plate 31 will form a sit-up board 33 with a lower front and a higher back and a slight slope with the top plate 32 of the support frame. The fitness seat backrest 4 is flipped backward and unfolded to be on the same plane with the sit-up board 33 with a lower front and a higher back and a slight slope. The user lies on the sit-up board 33 with his head resting on the sit-up pillow 34 and his feet hooked on the foot fixing shaft 36 on the front end vertical frame crossbeam 35 of the support frame, and then he can do sit-ups normally, thereby achieving the purpose of exercising the waist and chest muscles.

[0023] As a technical optimization scheme of the present invention, in order to enable the installation of the left rear drive counterweight tray 5 and the right rear drive counterweight tray 6 in the double-arm rear-push drive counterweight device, the left rear drive counterweight tray 5 is installed on the left side of the rear half of the support frame 1 through the inner diameter of the bearing in the left rear drive counterweight tray bearing sleeve 8 in front of the left rear drive counterweight tray 5, cooperating with the left rear drive counterweight tray fixed shaft 37 on the left side of the rear half of the support frame 1; the right rear drive counterweight tray 6 is installed on the right side of the rear half of the support frame 1 through the inner diameter of the bearing in the right rear drive counterweight tray bearing sleeve 15 in front of the right rear drive counterweight tray 6, cooperating with the right rear drive counterweight tray fixed shaft 38 on the right side of the rear half of the support frame 1.

[0024] As a technical optimization scheme of the present invention, in order to realize the installation of the left front drive counterweight tray 21 and the right front drive counterweight tray 22 in the double-pedal drive counterweight device, the left front drive counterweight tray 21 is installed on the left side of the front end upright frame 3 of the support frame through the inner diameter of the bearing in the left front drive counterweight tray bearing sleeve 24 behind the left front drive counterweight tray 21, cooperating with the left front drive counterweight tray fixed shaft 39 on the left side of the front end upright frame 3 of the support frame; the right front drive counterweight tray 22 is installed on the right side of the front end upright frame 3 of the support frame through the inner diameter of the bearing in the right front drive counterweight tray bearing sleeve 28 behind the right front drive counterweight tray 22, cooperating with the right front drive counterweight tray fixed shaft 40 on the right side of the front end upright frame 3 of the support frame.

[0025] As a technical optimization scheme of the present invention, in order to make the sit-up device more stable, the sit-up board 33 in the sit-up device is formed by the fitness seat 2 being flipped forward and unfolded through the fitness seat flip hinges 41, 42, and is supported by the sit-up board support attachment 43 movable in the front half of the support frame 1, and the fitness seat backrest 4 behind the fitness seat 2 is locked, and can be opened and unfolded backward through the fitness seat backrest flip hinges 44, 45, and is supported by the fitness seat backrest support attachment 46 movable behind the support frame 1.

[0026] The working principle and use process of a hand-pushing and foot-pedal sit-up fitness machine of the present invention are as follows: when it is necessary to exercise the muscles of both arms and legs, the user sits on the fitness seat 2, with the back against the fitness seat backrest 4, holds the left driving handle 12 and the right driving handle 19 with both hands, raises and lowers both hands, and pushes the arms back and forth with force, so that the left rear weight group 7 in the left rear driving counterweight tray 5 and the right rear weight group 14 in the right rear driving counterweight tray 6 will be when the left rear driving arm 9 and the right rear driving arm 16 are subjected to force, with the left rear driving counterweight tray fixed shaft 37 and the right rear driving counterweight tray fixed shaft 38 as The fulcrum rises upward, so that the arms bear the gravity of the left rear weight group 7 and the right rear weight group 14. When the hands are raised, the left rear weight group 7 in the left rear driving counterweight tray 5 and the right rear weight group 14 in the right rear driving counterweight tray 6 fall down, so that the arms do not bear the gravity of the left rear weight group 7 and the right rear weight group 14, thereby achieving the purpose of exercising the arm muscles by pushing the arms backward with force. At the same time, the feet are placed on the left driving pedal 26 and the right driving pedal 30, and the legs are pedaled forward with force. The left front weight group 23 in the left front driving counterweight tray 21 and the right front weight group 22 in the right front driving counterweight tray 22 are pushed back and forth. When the left front driving arm 25 and the right front driving arm 29 are stressed, the front weight group 27 will rise upward with the left front driving counterweight tray fixed shaft 39 and the right front driving counterweight tray fixed shaft 40 as fulcrums, so that the legs bear the gravity of the left front weight group 23 and the right front weight group 27. When the legs are bent back, the left front weight group 23 in the left front driving counterweight tray 21 and the right front weight group 27 in the right front driving counterweight tray 22 fall down, so that the legs do not bear the gravity of the left front weight group 23 and the right front weight group 27, thereby achieving the purpose of exercising the leg muscles by pedaling forward reciprocatingly with the legs. When it is necessary to exercise the waist and chest muscles, the user flips the fitness seat 2 forward 180 degrees and unfolds it, and the fitness seat bottom plate 31 will form a sit-up board 33 with a lower front and a higher back and a slight slope with the top plate 32 of the support frame. The fitness seat backrest 4 flips backward and unfolds it to be on the same plane with the sit-up board 33 with a lower front and a higher back and a slight slope. The user lies on the sit-up board 33 with his head resting on the sit-up pillow 34 and his feet hooking the foot fixing shaft 36 on the front end vertical frame crossbeam 35 of the support frame, and then he can do sit-ups normally, thereby achieving the purpose of exercising the waist and chest muscles.

[0027] The above is a preferred embodiment of the present invention. The embodiment of the present invention is for technical personnel in the relevant field to clearly understand that the technical solution conceived by the present invention can be implemented and realized, and produces positive and beneficial effects. The content not described in detail in this specification, such as the installation method of the front end frame of the support frame that can be synchronously telescoped forward and backward and translated and locked after adjustment, the shape, number and installation method of the weights, the installation method of the hinge, the installation method of the sit-up board support frame and the fitness seat back support frame, as well as the installation method of bearings and tension springs, belongs to the prior art known to professional and technical personnel in this field.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hand-pushing and foot-pedal sit-up type fitness machine, comprising a support frame (1) and a fitness seat (2), characterized in that: The left and right sides of the rear half of the support frame (1) are provided with double-arm backward-pushing driving counterweight devices; the left and right sides of the front stand frame (3) of the support frame are provided with double-foot pedaling driving counterweight devices; the fitness seat (2) that can be unfolded forward above the rear half of the support frame (1), the fitness seat backrest (4) that can be unfolded backward behind the fitness seat (2), and the foot fixing shaft (36) on the front stand frame crossbeam (35) of the support frame constitute a sit-up device; the front stand frame (3) of the support frame can be synchronously telescoped forward and backward and translated for adjustment and then locked.

2. A hand-pushing and foot-pedaling sit-up fitness machine according to claim 1, wherein: The double-arm push-back driven counterweight device comprises a left rear driven counterweight tray (5) which can rotate forward and backward on the left side of the rear half of the support frame (1), and a right rear driven counterweight tray (6) which can rotate forward and backward on the right side of the rear half of the support frame (1). The left rear driven counterweight tray (5) is provided with a left rear weight group (7). The front side of the left rear driven counterweight tray bearing sleeve (8) is a left rear driving arm (9). The left rear driving arm (9) is connected to the left driving rod (10) by a left driving rod ball head (11). The front end of the left driving rod (10) is A left driving handle (12) is installed, and a left driving handle stopper (13) is arranged on the left driving handle (12); a right rear weight group (14) is arranged in the right rear driving counterweight tray (6); a right rear driving arm (16) is arranged in front of a right rear driving counterweight tray bearing sleeve (15); the right rear driving arm (16) is connected to a right driving rod (17) by a right driving rod ball head (18); a right driving handle (19) is installed at the front end of the right driving rod (17); and a right driving handle stopper (20) is arranged on the right driving handle (19).

3. A hand-push and foot-pedal sit-up fitness machine according to claim 1, wherein: The double-pedal-type driving counterweight device comprises a left front driving counterweight tray (21) which can rotate forward and backward on the left side of a front end stand (3) of a support frame, and a right front driving counterweight tray (22) which can rotate forward and backward on the right side of the front end stand (3) of the support frame. The left front driving counterweight tray (21) is provided with a left front weight group (23), the rear side of a bearing sleeve (24) of the left front driving counterweight tray is a left front driving arm (25), and the rear end of the left front driving arm (25) is a left driving pedal (26), the right front driving counterweight tray (22) is provided with a right front weight group (27), the rear side of a bearing sleeve (28) of the right front driving counterweight tray is a right front driving arm (29), and the rear end of the right front driving arm (29) is a right driving pedal (30).

4. A hand-pushing and foot-pedaling sit-up fitness machine according to claim 1, wherein: The sit-up device comprises a fitness seat (2) above the rear half of a support frame (1); the fitness seat (2) can be turned forward by 180 degrees to form a sit-up board (33) with a lower front and a higher rear and a slight slope with a fitness seat bottom plate (31) and a support frame top plate (32); the fitness seat backrest (4) can be turned backward to form a sit-up board (33) with a lower front and a higher rear and a slight slope; a sit-up pillow (34) is provided on the fitness seat backrest (4); and a foot fixing shaft (36) is provided on the front end vertical frame crossbeam 35 of the support frame.

5. A hand-pushing and foot-pedaling sit-up fitness machine according to claim 1 or 2, wherein: The left rear drive counterweight tray (5) is mounted on the left side of the rear half of the support frame (1) by cooperating with the left rear drive counterweight tray fixing shaft (37) on the left side of the rear half of the support frame (1) through the inner diameter of the bearing inside the left rear drive counterweight tray bearing sleeve (8) at the front of the left rear drive counterweight tray (5), and the right rear drive counterweight tray (6) is mounted on the right side of the rear half of the support frame (1) by cooperating with the right rear drive counterweight tray fixing shaft (38) on the right side of the rear half of the support frame (1) through the inner diameter of the bearing inside the right rear drive counterweight tray bearing sleeve (15) at the front of the right rear drive counterweight tray (6), and the right rear drive counterweight tray fixing shaft (38) on the right side of the rear half of the support frame (1).

6. A hand-pushing and foot-pedaling sit-up fitness machine according to claim 1 or 3, wherein: The left front driving counterweight tray (21) is mounted on the left side of the front end stand (3) of the support frame by cooperating with the left front driving counterweight tray fixing shaft (39) through the inner diameter of the bearing inside the left front driving counterweight tray bearing sleeve (24) at the rear of the left front driving counterweight tray (21) and the left front driving counterweight tray fixing shaft (39) at the left side of the front end stand (3) of the support frame; the right front driving counterweight tray (22) is mounted on the right side of the front end stand (3) of the support frame by cooperating with the right front driving counterweight tray fixing shaft (40) at the right side of the front end stand (3) of the support frame through the inner diameter of the bearing inside the right front driving counterweight tray bearing sleeve (28) at the rear of the right front driving counterweight tray (22).

7. A hand-pushing and foot-pedaling sit-up fitness machine according to claim 1 or 4, wherein: The sit-up board (33) in the sit-up device is formed by the fitness seat (2) being flipped forward and unfolded through the fitness seat flip hinges (41) and (42), and is supported by the sit-up board support attachment frame (43) at the front half of the support frame (1); the fitness seat backrest (4) behind the fitness seat (2) is locked, can be opened and unfolded backward through the fitness seat backrest flip hinges (44) and (45), and is supported by the fitness seat backrest support attachment frame (46) behind the support frame (1).

8. A hand-pushing and foot-pedaling sit-up fitness machine according to claim 2, wherein: Tension springs can be installed between the bottoms of the left rear driving counterweight tray (5) and the right rear driving counterweight tray (6) in the double-arm rear-push driving counterweight device and the lower sides of the left and right sides of the rear half of the support frame (1).

9. A hand-pushing and foot-pedaling sit-up fitness machine according to claim 3, wherein: Tension springs can be installed between the bottom of the left front driving counterweight tray (21) and the right front driving counterweight tray (22) in the double-pedal driving counterweight device and the lower halves of the left and right sides of the front stand (3) of the support frame.

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