Sitting posture leg flexion and extension training device
Through the design of the guardrail adjustment components and counterweight components, the problem of insufficient upper body fixation of the traditional sitting leg flexion and extension training device is solved, and adaptability to users of different heights and figures is achieved, training stability and comfort are improved, and the risk of injury is reduced.
Patent Information
- Application Number
- CN202422072305.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The traditional sitting leg flexion and extension training device lacks upper body fixation device, which causes the user to easily tilt the upper body during training, affecting the training effect and increasing the risk of injury.
A seated leg flexion and extension training device including a guardrail adjustment assembly and a counterweight assembly is designed. The height and spacing of the guardrail are adjusted through the guardrail adjustment assembly to adapt to users of different heights. The counterweight assembly adjusts the training intensity, fixes the upper body with the handrail, and the angle adjustment assembly improves the comfort of use.
It achieves adaptability to users of different heights and figures, improves the stability and comfort of training, reduces the risk of injury, and enhances the training effect.
Smart Images
Figure CN223248716U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fitness equipment, and more specifically, to a sitting leg flexion and extension training device. Background Art
[0002] The Seated Leg Curl is a fitness device designed specifically for training lower limb muscles, particularly those strengthening and staminaing the quadriceps. By simulating the natural movements of leg curls and extensions, it effectively targets the front thigh muscles, helping to build strength and improve endurance. Continued training also helps create tighter, more defined legs and enhances muscle definition. Furthermore, the need for balance and stability while using the Seated Leg Curl also helps improve coordination and stability.
[0003] However, when exercising with a traditional seated leg curl and extension training device, the user's upper body is prone to shaking during the force application process, resulting in insufficient stability, which not only has a negative impact on the exercise effect, but may also increase the risk of injury. Utility Model Content
[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a seated leg flexion and extension training device. The technical problem to be solved by the present invention is that the traditional seated leg flexion and extension training device lacks an upper body fixing device, which makes it easy for the user's upper body to tilt during training, thereby affecting the training effect.
[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a sitting leg flexion and extension training device, comprising a base frame, a counterweight assembly fixedly provided on the top of the base frame, a second column fixedly connected to the top of the base frame, a seat frame fixedly connected to the top of the second column, a seat board fixedly connected to the top of the seat frame, a seat cushion fixedly connected to the top of the seat board, a back frame rotatably connected to one end of the seat frame, an angle adjustment assembly provided on the bottom of the back frame, a back board fixedly connected to the front of the back frame, a back cushion fixedly connected to the front of the back board, and a guard frame adjustment assembly provided on the back of the back frame;
[0006] The guard frame adjustment assembly includes two fixed seats, two sliding rods are fixedly connected between the two fixed seats, the outer surfaces of the two sliding rods are slidably sleeved with a slider, the inner surfaces of the two fixed seats are rotatably connected to a first screw, and the slider is threadedly sleeved on the outer surface of the first screw, both sides of the sliding rod are fixedly connected to a slide plate, the inner surfaces of the two slide plates are slidably connected to a slide plate, the opposite ends of the two slide plates are fixedly connected to a guard rod, the back side of the slider is fixedly connected to a mounting shell, the inner surface of the mounting shell is rotatably connected to a second threaded sleeve, the inner thread of the second threaded sleeve The threaded sleeve is connected to two second screws, and the two second screws are respectively located at both ends of the second threaded sleeve. The backs of the two slides are fixedly connected with connecting blocks, and the two connecting blocks are respectively fixedly connected to the ends opposite to each other of the two second screws. The outside of the second threaded sleeve is fixedly connected to the driven bevel gear, and the interior of the mounting shell is rotatably connected to a rotating shaft. One end of the rotating shaft located inside the mounting shell is fixedly connected to the driving bevel gear, and the driving bevel gear is meshed with the driven bevel gear. The other end of the rotating shaft is fixedly connected to a second handwheel, and the top of the first screw is fixedly connected to the first handwheel.
[0007] like Figure 1-4 As shown, the embodiment is specifically as follows: by rotating the first hand wheel, the first screw rod can be driven to rotate, and then the slider can be driven up and down under the action of the thread, so that the height of the two guardrails can be adjusted, thereby adapting to users of different heights;
[0008] By rotating the second hand wheel, the rotating shaft can be driven, and then the second threaded sleeve can be driven to rotate through the meshing active bevel gear and the driven bevel gear. Subsequently, under the action of the thread, the two second screws can be moved in opposite directions, and then the two slides can be driven to move through the connecting block, so that the distance between the two guard bars can be adjusted, making the device suitable for users of different body shapes.
[0009] In a preferred embodiment, the counterweight assembly includes a first column, the first column is fixedly connected to the top of the base frame, the outside of the first column is fixedly connected to a cross bar, the end of the cross bar away from the first column is rotatably connected to a rotating rod, the inner side of the rotating rod is fixedly connected to a lower block rod, the outer side of the rotating rod is fixedly connected to a third screw, the outer side of the third screw is movably sleeved with a plurality of counterweight plates, the outer thread of the third screw is sleeved with a fixing nut, and the inner side of the cross bar is fixedly connected to an upper block rod.
[0010] By turning the fixing nut, the number of weight plates can be adjusted quickly and conveniently, thereby adjusting the training intensity. The user places the calf at the bottom of the lower bar and then lifts it up with force to achieve the purpose of leg training.
[0011] In a preferred embodiment, the angle adjustment assembly includes a mounting seat, which is fixedly connected to the bottom of the back frame, and the bottom of the seat frame is fixedly connected to an arc plate. The interior of the mounting seat is fixedly sleeved with a first threaded sleeve, and the interior of the arc plate is provided with a plurality of fixing holes, and the first threaded sleeve is adapted to the fixing holes. The internal thread of the first threaded sleeve is sleeved with a bolt, and the bolt is located inside the corresponding fixing hole.
[0012] By removing the bolts, adjusting the back frame to a suitable angle, and then inserting the bolts into the corresponding fixing holes, the inclination angle of the back frame can be fixed, making it more comfortable for users to use.
[0013] In a preferred embodiment, a baffle is fixedly connected to the top of the base frame, and a buffer pad is fixedly connected to the outside of the baffle.
[0014] The buffer pad can prevent the rotating rod from directly hitting the retaining frame and generating noise.
[0015] In a preferred embodiment, armrests are fixedly connected to both sides of the seat frame.
[0016] The armrests provided can help users to fix their upper body.
[0017] In a preferred embodiment, the outer portions of the lower baffle rod and the upper baffle rod are movably sleeved with protective sleeves.
[0018] The provided sheath can make the user feel more comfortable when using it.
[0019] The technical effects and advantages of this utility model are:
[0020] By rotating the first hand wheel, the first screw rod can be driven to rotate, and then the slider can be driven up and down by the action of the thread, so that the height of the two guard bars can be driven, so that it can adapt to users of different heights. By rotating the second hand wheel, the rotating shaft can be driven, and then the second threaded sleeve can be driven to rotate through the meshing active bevel gear and the driven bevel gear. Then, under the action of the thread, the two second screw rods can be moved in the opposite direction, and then the two slides can be driven to move through the connecting block, so that the distance between the two guard bars can be adjusted, so that the device can be suitable for users of different body shapes. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0022] Figure 2 It is a schematic diagram of the overall back structure of the utility model.
[0023] Figure 3 for Figure 1Schematic diagram of the enlarged structure at point A in the middle.
[0024] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at point B in the middle.
[0025] The accompanying drawings are marked as follows: 1, base frame; 2, first column; 3, rotating rod; 4, lower stop rod; 5, upper stop rod; 6, third screw; 7, counterweight plate; 8, fixing nut; 9, cover; 10, cross bar; 11, stop frame; 12, cushion; 13, second column; 14, seat frame; 15, seat plate; 16, cushion; 17, armrest; 18, back frame; 19, mounting seat; 20, arc plate; 21, first threaded sleeve; 2 2. Bolt; 23. Fixing hole; 24. Back pad; 25. Fixing seat; 26. Slide rod; 27. Slider; 28. First screw rod; 29. Mounting shell; 30. Rotating shaft; 31. Driving bevel gear; 32. Driven bevel gear; 33. Slide plate; 34. Slide plate; 35. Second threaded sleeve; 36. Second screw rod; 37. Connecting block; 38. Guard rod; 39. First hand wheel; 40. Second hand wheel; 42. Back plate. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0027] The utility model provides a sitting leg flexion and extension training device, comprising a base frame 1, a counterweight assembly fixedly provided on the top of the base frame 1, a second column 13 fixedly connected to the top of the base frame 1, a seat frame 14 fixedly connected to the top of the seat frame 14, a seat board 15 fixedly connected to the top of the seat board 15, a seat cushion 16 fixedly connected to the top of the seat board 15, one end of the seat frame 14 rotatably connected to a back frame 18, an angle adjustment assembly provided at the bottom of the back frame 18, a back board 42 fixedly connected to the front of the back frame 18, a back cushion 24 fixedly connected to the front of the back board 42, and a guard frame adjustment assembly provided on the back of the back frame 18;
[0028] The guard frame adjustment assembly includes two fixed seats 25, two sliding rods 26 are fixedly connected between the two fixed seats 25, the outer parts of the two sliding rods 26 are slidably sleeved with sliders 27, the inner parts of the two fixed seats 25 are rotatably connected with a first screw 28, and the slider 27 is threadedly sleeved on the outer part of the first screw 28, both sides of the sliding rod 26 are fixedly connected with a slide plate 33, the inner parts of the two slide plates 33 are slidably connected with a slide plate 34, and the opposite ends of the two slide plates 34 are fixedly connected with a guard rod 38, the back of the slider 27 is fixedly connected with a mounting shell 29, the inner part of the mounting shell 29 is rotatably connected with a second threaded sleeve 35, and the inner thread of the second threaded sleeve 35 is screwed in place. Two second screws 36 are sleeved, and the two second screws 36 are respectively located at both ends of the second threaded sleeve 35. The backs of the two slides 34 are fixedly connected with connecting blocks 37, and the two connecting blocks 37 are respectively fixedly connected to the opposite ends of the two second screws 36. The outside of the second threaded sleeve 35 is fixedly connected with a driven bevel gear 32, and the interior of the mounting shell 29 is rotatably connected with a rotating shaft 30. One end of the rotating shaft 30 located inside the mounting shell 29 is fixedly connected with a driving bevel gear 31, and the driving bevel gear 31 is meshed with the driven bevel gear 32. The other end of the rotating shaft 30 is fixedly connected with a second handwheel 40, and the top of the first screw 28 is fixedly connected with a first handwheel 39.
[0029] like Figure 1-4 As shown, the embodiment is specifically as follows: by rotating the first hand wheel 39, the first screw rod 28 can be driven to rotate, and then the slider 27 can be driven up and down under the action of the thread, so that the height of the two guard bars 38 can be adjusted, thereby adapting to users of different heights;
[0030] By rotating the second hand wheel 40, the rotating shaft 30 can be driven, and then the second threaded sleeve 35 can be driven to rotate through the meshing active bevel gear 31 and the driven bevel gear 32. Subsequently, under the action of the thread, the two second screw rods 36 can be moved in opposite directions, and then the two slides 34 can be driven to move through the connecting block 37, so that the distance between the two guard bars 38 can be adjusted, making the device suitable for users of different body shapes.
[0031] The counterweight assembly includes a first column 2, which is fixedly connected to the top of the base frame 1. The outside of the first column 2 is fixedly connected to a cross bar 10, and the end of the cross bar 10 away from the first column 2 is rotatably connected to a rotating rod 3, the inner side of the rotating rod 3 is fixedly connected to a lower block rod 4, the outer side of the rotating rod 3 is fixedly connected to a third screw rod 6, the outer side of the third screw rod 6 is movably sleeved with a plurality of counterweight plates 7, the outer side of the third screw rod 6 is threadedly sleeved with a fixing nut 8, and the inner side of the cross bar 10 is fixedly connected to an upper block rod 5.
[0032] like Figure 1-2 As shown, the specific implementation method is: by turning the fixing nut 8, the number of weight plates 7 can be adjusted conveniently and quickly, thereby adjusting the training intensity. The user places the calf at the bottom of the lower barrier bar 4 and then lifts it up with force to achieve the purpose of leg training.
[0033] The angle adjustment assembly includes a mounting seat 19, which is fixedly connected to the bottom of the back frame 18. The bottom of the seat frame 14 is fixedly connected to an arc plate 20. The interior of the mounting seat 19 is fixedly sleeved with a first threaded sleeve 21. The interior of the arc plate 20 is provided with a plurality of fixing holes 23, and the first threaded sleeve 21 is adapted to the fixing holes 23. The interior of the first threaded sleeve 21 is threadedly sleeved with a bolt 22, and the bolt 22 is located inside the corresponding fixing hole 23.
[0034] like Figure 1-3 As shown, the specific implementation method is: by removing the bolt 22, then adjusting the back frame 18 to a suitable angle, and then inserting the bolt 22 into the corresponding fixing hole 23, the inclination angle of the back frame 18 can be fixed, so that the user can use it more comfortably.
[0035] A retaining frame 11 is fixedly connected to the top of the base frame 1 , and a buffer pad 12 is fixedly connected to the outside of the retaining frame 11 .
[0036] like Figure 1-2 As shown, the embodiment is specifically as follows: the buffer pad 12 is provided to prevent the rotating rod 3 from directly hitting the blocking frame 11 and generating noise.
[0037] Armrests 17 are fixedly connected to both sides of the seat frame 14 .
[0038] like Figure 1-2 As shown, the embodiment is specifically as follows: the armrests 17 provided can facilitate the user to fix the upper body.
[0039] The outer parts of the lower blocking rod 4 and the upper blocking rod 5 are both movably sleeved with a sheath 9 .
[0040] like Figure 1-2 As shown, the embodiment is specifically as follows: the provision of the protective cover 9 can make the user feel more comfortable when using the device.
[0041] Working principle of this utility model:
[0042] When the distance and height of the two guard bars 38 need to be adjusted, the first hand wheel 39 is first rotated to drive the first screw 28 to rotate, and then the slider 27 is driven up and down by the action of the thread, thereby adjusting the height of the two guard bars 38 to accommodate users of different heights.
[0043] By rotating the second hand wheel 40, the rotating shaft 30 can be driven, and then the second threaded sleeve 35 can be driven to rotate through the meshing active bevel gear 31 and the driven bevel gear 32. Subsequently, under the action of the thread, the two second screw rods 36 can be moved in opposite directions, and then the two slides 34 can be driven to move through the connecting block 37, so that the distance between the two guard bars 38 can be adjusted, making the device suitable for users of different body shapes.
[0044] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.
[0045] Secondly: The drawings of the embodiments disclosed in this utility model only involve structures related to the embodiments disclosed in this utility model. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the utility model can be combined with each other.
[0046] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A sitting leg flexion and extension training device, comprising a base frame (1), characterized in that: The top of the base frame (1) is fixedly provided with a counterweight assembly, the top of the base frame (1) is fixedly connected to a second column (13), the top of the second column (13) is fixedly connected to a seat frame (14), the top of the seat frame (14) is fixedly connected to a seat board (15), the top of the seat board (15) is fixedly connected to a seat cushion (16), one end of the seat frame (14) is rotatably connected to a back frame (18), the bottom of the back frame (18) is provided with an angle adjustment assembly, the front of the back frame (18) is fixedly connected to a back board (42), the front of the back board (42) is fixedly connected to a back cushion (24), and the back of the back frame (18) is provided with a guard frame adjustment assembly; The guard frame adjustment assembly includes two fixed seats (25), two sliding rods (26) are fixedly connected between the two fixed seats (25), the outer portions of the two sliding rods (26) are slidably sleeved with a slider (27), the inner portions of the two fixed seats (25) are rotatably connected with a first screw rod (28), and the slider (27) is threadedly sleeved on the outer portion of the first screw rod (28), both sides of the sliding rod (26) are fixedly connected with a chute plate (33), the inner portions of the two chute plates (33) are slidably connected with a slide plate (34), the opposite ends of the two slide plates (34) are fixedly connected with a guard rod (38), the back side of the slider (27) is fixedly connected with a mounting shell (29), the inner portion of the mounting shell (29) is rotatably connected with a second threaded sleeve (35), the inner thread of the second threaded sleeve (35) is screwed inwardly. Two second screw rods (36) are connected to the threaded sleeve, and the two second screw rods (36) are respectively located at the two ends of the second threaded sleeve (35). The backs of the two slide plates (34) are fixedly connected with a connecting block (37), and the two connecting blocks (37) are respectively fixedly connected to the ends of the two second screw rods (36) that are separated from each other. The outside of the second threaded sleeve (35) is fixedly connected with a driven bevel gear (32). The inside of the mounting shell (29) is rotatably connected with a rotating shaft (30). One end of the rotating shaft (30) located inside the mounting shell (29) is fixedly connected with a driving bevel gear (31), and the driving bevel gear (31) is meshed with the driven bevel gear (32). The other end of the rotating shaft (30) is fixedly connected with a second hand wheel (40). The top of the first screw rod (28) is fixedly connected with a first hand wheel (39).
2. A sitting leg flexion and extension training device according to claim 1, characterized in that: The counterweight assembly comprises a first column (2), the first column (2) being fixedly connected to the top of the base frame (1), the outside of the first column (2) being fixedly connected to a cross bar (10), the end of the cross bar (10) away from the first column (2) being rotatably connected to a rotating rod (3), the inner side of the rotating rod (3) being fixedly connected to a lower stop bar (4), the outer side of the rotating rod (3) being fixedly connected to a third screw rod (6), the outer side of the third screw rod (6) being movably sleeved with a plurality of counterweight plates (7), the outer side of the third screw rod (6) being threadedly sleeved with a fixing nut (8), and the inner side of the cross bar (10) being fixedly connected to an upper stop bar (5).
3. The seated leg flexion and extension training device according to claim 1, characterized in that: The angle adjustment assembly includes a mounting seat (19), the mounting seat (19) is fixedly connected to the bottom of the back frame (18), the bottom of the seat frame (14) is fixedly connected to an arc plate (20), the interior of the mounting seat (19) is fixedly sleeved with a first threaded sleeve (21), the interior of the arc plate (20) is provided with a plurality of fixing holes (23), and the first threaded sleeve (21) is adapted to the fixing holes (23), the interior of the first threaded sleeve (21) is threadedly sleeved with a bolt (22), and the bolt (22) is located inside the corresponding fixing hole (23).
4. The sitting leg flexion and extension training device according to claim 1, characterized in that: The top of the base frame (1) is fixedly connected to a retaining frame (11), and the outside of the retaining frame (11) is fixedly connected to a buffer pad (12).
5. The seated leg flexion and extension training device according to claim 1, characterized in that: Armrests (17) are fixedly connected to both sides of the seat frame (14).
6. The sitting leg flexion and extension training device according to claim 2, characterized in that: The outer portions of the lower blocking rod (4) and the upper blocking rod (5) are both movably sleeved with protective sleeves (9).