Anti-deviation structure of adjustable fitness supine board

Abstract

The utility model provides an adjustable fitness supine board deviation prevention structure which comprises a main frame, a supporting frame and an adjusting frame, one end of the supporting frame is hinged to the main frame, a sawtooth plate is arranged on the main frame, and a plurality of clamping grooves are formed in the sawtooth plate in the length direction of the sawtooth plate; one end of the adjusting frame is hinged to the bottom of the supporting frame, the other end of the adjusting frame is provided with an anti-deviation wheel matched with the clamping groove of the sawtooth plate, the anti-deviation wheel can slide in the length direction of the sawtooth plate, and the anti-deviation wheel is in a concave shape. The concave anti-deviation wheel is arranged at the free end of the adjusting frame, the groove in the middle of the anti-deviation wheel can be matched with the sawtooth plate, the bosses on the two sides of the groove limit left-right movement of the anti-deviation wheel, and it is guaranteed that the sawtooth plate is always located at the groove position of the anti-deviation wheel in the using process; and therefore, the problem that the adjusting frame deviates leftwards and rightwards in the using process is avoided, and the safety in the using process is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and in particular to an anti-deviation structure for an adjustable fitness sit-up board. Background Technology

[0002] The sit-up bench is one of the most common pieces of fitness equipment, primarily designed for abdominal training. To accommodate different heights and intensity levels, many adjustable sit-up benches are now available on the market. An adjustable sit-up bench typically consists of a main frame, a support frame, and an adjustment frame. The height of the support frame is adjusted by the position of the adjustment frame relative to the toothed plate.

[0003] However, during use, due to factors such as user weight, range of motion, and the clearance between the linkage adjustment frames, the adjustment frame is prone to lateral shifting, affecting the user experience and even posing safety hazards. Existing technologies typically employ simple fixing devices or counterweights to prevent the adjustment frame from shifting, but their effectiveness is limited and cannot completely solve the shifting problem. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an anti-deviation structure for an adjustable fitness sit-up board, so as to solve the problem that the adjustable frame is prone to deviation during use in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides an anti-deviation structure for an adjustable fitness sit-up bench, comprising a main frame, a support frame, and an adjustment frame. One end of the support frame is hinged to the main frame, and the main frame is provided with a serrated plate, which has a plurality of slots along its length. One end of the adjustment frame is hinged to the bottom of the support frame, and the other end of the adjustment frame is provided with an anti-deviation wheel that cooperates with the slots of the serrated plate. The anti-deviation wheel can slide along the length of the serrated plate and is concave in shape.

[0006] In one embodiment of the present invention, the anti-deviation wheel has a groove in the middle, and the anti-deviation wheel slides in cooperation with the serrated plate through the groove.

[0007] In one embodiment of the present invention, the main frame is provided with two symmetrically arranged serrated plates, and the number of anti-deviation wheels is two, with the two anti-deviation wheels respectively disposed on both sides of the other end of the adjustment frame.

[0008] In one embodiment of this utility model, the anti-deviation wheel is fixedly disposed at the other end of the adjusting frame or rotatably disposed at the other end of the adjusting frame.

[0009] In one embodiment of the present invention, a first shaft hole is provided at the other end of the adjusting frame, a first rotating shaft is rotatably provided in the first shaft hole, and two anti-deviation wheels are fixedly provided at both ends of the first rotating shaft.

[0010] In one embodiment of the present invention, a first shaft hole is provided at the other end of the adjusting frame, a first rotating shaft is fixedly installed in the first shaft hole, and two anti-deviation wheels are respectively rotatably installed at both ends of the first rotating shaft.

[0011] In one embodiment of the present invention, a U-shaped component or a protective plate is provided at the bottom of the support frame, and a second rotating shaft is provided between the U-shaped component or the protective plate. One end of the adjustment frame is hinged to the bottom of the support frame through the second rotating shaft.

[0012] In one embodiment of the present invention, the second rotating shaft is located at the middle position of the bottom of the support frame.

[0013] In one embodiment of the present invention, handles are also provided on both sides of the adjustment frame.

[0014] In one embodiment of the present invention, a collision prevention post is provided above the adjustment frame or below the support frame.

[0015] As described above, the anti-deviation structure of the adjustable fitness sit-up board of this utility model has the following beneficial effects:

[0016] 1. This utility model provides a concave anti-deviation wheel at the free end of the adjustment frame, allowing the groove in the middle of the anti-deviation wheel to engage with the serrated plate. The protrusions on both sides of the groove restrict the left and right movement of the anti-deviation wheel, ensuring that the serrated plate is always in the groove position of the anti-deviation wheel during use. This prevents the adjustment frame from shifting left or right during use and ensures safety during operation.

[0017] 2. This utility model designs the anti-deviation wheel at the free end of the adjustment frame to be rotatable, which can change sliding to rolling. When adjusting the height at the sliding free end, the sliding adjustment of the anti-deviation wheel is smoother, improving the user experience. Attached Figure Description

[0018] Figure 1 This is a disassembly diagram of the anti-deviation structure of an adjustable fitness sit-up board disclosed in Embodiment 1 of this utility model.

[0019] Figure 2 This is a disassembly diagram of the anti-deviation structure of an adjustable fitness sit-up board disclosed in Embodiment 2 of this utility model.

[0020] Figure 3 for Figure 2 A schematic diagram of the structure at the adjustment frame.

[0021] Description of Component Labels

[0022] 1. Main frame; 2. Support frame; 21. Second rotating shaft; 22. "冂"-shaped part; 23. Guard plate; 3. Adjusting frame; 31. First shaft hole; 32. First rotating shaft; 33. Locking bolt; 34. End cover; 35. Countersunk hexagon socket bolt; 4. Serrated plate; 41. Card slot; 42. Bar; 5. Anti-deviation wheel; 51. Groove; 6. Handle; 7. Anti-collision column. Detailed Implementation Manner

[0023] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in this technology can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0024] Embodiment 1

[0025] Please refer to Figure 1 , this embodiment provides an anti-deviation structure for an adjustable fitness supine board, including a main frame 1, a support frame 2 and an adjusting frame 3. The side of the main frame 1 is in an "inverted V" shape. One end of the support frame 2 is hinged to the higher end B point of the main frame 1. There are two symmetrically arranged serrated plates 4 on the main frame 1. A plurality of card slots 41 are provided along the length direction of the serrated plate 4. One end of the adjusting frame 3 is hinged to the middle of the bottom of the support frame 2. The other end of the adjusting frame 3 is a free end, and anti-deviation wheels 5 cooperating with the serrated plates 4 are respectively provided on both sides thereof. The anti-deviation wheels 5 can slide along the length direction of the serrated plates 4. Therefore, the support frame 2 adjusts the height by the position of the free end of the adjusting frame 3 relative to the serrated plates 4.

[0026] Among them, the anti-deviation wheel 5 is in a "concave" shape, and a groove 51 is provided around the middle of the anti-deviation wheel 5. The anti-deviation wheel 5 is slidably engaged with the serrated plate 4 through its groove 51. The material of the anti-deviation wheel 5 is not limited, as long as it meets the strength requirements. During use, the groove 51 on the anti-deviation wheel 5 can cooperate with the serrated plate 4 to ensure that the serrated plate 4 is always in the position of the groove 51 of the anti-deviation wheel 5. The bosses on both sides of the groove 51 limit the left and right movement of the anti-deviation wheel 5, thereby ensuring that the adjusting frame 3 will not deviate left and right during use and ensuring safety during use.

[0027] In this embodiment, the anti-deviation wheel 5 is fixedly arranged at the free end of the adjusting frame 3. Specifically, a through first shaft hole 31 is formed at the free end of the adjusting frame 3, a first rotating shaft 32 is arranged in the first shaft hole 31, threaded holes are formed in the first rotating shaft 32 and the adjusting frame 3 in a matching manner, and the first rotating shaft 32 and the adjusting frame 3 are fixedly connected by locking bolts 33 being locked into the threaded holes. Two anti-deviation wheels 5 are respectively fixedly arranged at both ends of the first rotating shaft 32 through countersunk socket hexagon bolts 35; and an end cover 34 is arranged between the anti-deviation wheel 5 and the countersunk socket hexagon bolt 35.

[0028] In this embodiment, a "冂"-shaped member 22 is arranged at the middle position below the support frame 2, a second rotating shaft 21 is arranged between the "冂"-shaped members 22, and one end of the adjusting frame 3 is rotatably connected to the "冂"-shaped member 22 through the second rotating shaft 21 to form a turning point A. The adjusting frame 3 can be adjusted back and forth through the turning point A and an indirect turning point B, so that the support frame 2 can be adjusted back and forth relative to the turning point B, thereby realizing the height adjustment of the support frame 2.

[0029] In this embodiment, handles 6 are further arranged on both sides of the adjusting frame 3, which is convenient for fitness enthusiasts to operate with both hands to adjust the height, improve safety, and enhance the operation experience.

[0030] In this embodiment, a collision-proof column 7 is arranged above the adjusting frame 3 to buffer the adjusting frame 3 and the support frame 2 during collision, reduce potential safety hazards caused by collision and reduce the noise during collision.

[0031] Embodiment 2

[0032] Please refer to Figures 2-3 , this embodiment provides an anti-deviation structure for an adjustable fitness abdominal board, including a main frame 1, a support frame 2 and an adjusting frame 3. The side of the main frame 1 is in an "entry" shape. One end of the support frame 2 is hinged to the higher end B point of the main frame 1. Two symmetrically arranged serrated plates 4 are arranged on the main frame 1. A plurality of card slots 41 are formed along the length direction of the serrated plate 4; one end of the adjusting frame 3 is hinged to the middle of the bottom of the support frame 2, and the other end of the adjusting frame 3 is a free end, and anti-deviation wheels 5 are respectively arranged on both sides thereof and are matched with the serrated plates 4. The anti-deviation wheels 5 can slide along the length direction of the serrated plates 4. Therefore, the support frame 2 realizes height adjustment by adjusting the position of the free end of the adjusting frame 3 relative to the serrated plates 4. Among them, the anti-deviation wheel 5 is in a "concave" shape, a groove 51 is annularly arranged in the middle of the anti-deviation wheel 5, and the anti-deviation wheel 5 is slidably matched with the serrated plate 4 through its groove 51.

[0033] In this embodiment, the anti-deviation wheel 5 is rotatably disposed at the free end of the adjusting frame 3. Specifically, the free end of the adjusting frame 3 includes two spaced plates, each plate having a through first shaft hole 31. The two ends of a first rotating shaft 32 are rotatably disposed within the two first shaft holes 31 via positioning pins. Two anti-deviation wheels 5 are respectively disposed at the two ends of the first rotating shaft 32 and rotate together with it. Designing the anti-deviation wheels 5 to rotate changes the sliding motion to rolling, making the sliding adjustment of the free end of the adjusting frame 3 smoother and improving the user experience.

[0034] In this embodiment, the serrated plate 4 further includes a stop bar above it, and a closed groove is formed between the stop bar 42 and the serrated plate 4. The slot 41 is correspondingly connected to the lower part of the groove. The closed groove can limit the sliding of the anti-deviation wheel 5, further correct the deviation between the adjustment frame 3 and the support frame 2, and avoid excessive rotation of the adjustment frame 3 causing safety hazards.

[0035] In this embodiment, the support frame 2 has downwardly extending guard plates 23 on both sides below, and the second rotating shaft 21 is rotatably disposed between the two guard plates 23, forming a pivot point A. The adjusting frame 3 can be adjusted back and forth through pivot point A and the indirect pivot point B, so that the support frame 2 can be adjusted back and forth relative to pivot point B, thereby realizing the height adjustment of the support frame 2.

[0036] In this embodiment, the adjustment frame 3 is also provided with handles 6 on both sides, which makes it convenient for fitness users to adjust the height with both hands, improve safety, and enhance the user experience.

[0037] In this embodiment, a collision-resistant post 7 is provided below the support frame 2 to buffer the adjustment frame 3 and the support frame 2 when they collide, thereby reducing safety hazards caused by the collision and reducing noise during the collision.

[0038] In summary, this utility model, by setting a concave anti-deviation wheel at the free end of the adjusting frame, allows the groove in the middle of the anti-deviation wheel to engage with the serrated plate. The protrusions on both sides of the groove restrict the lateral movement of the anti-deviation wheel, ensuring that the serrated plate remains in the groove position of the anti-deviation wheel during use. This prevents the adjusting frame from shifting laterally during operation, thus guaranteeing safety. Therefore, this utility model effectively overcomes the various shortcomings of existing technologies and possesses high industrial application value.

[0039] The terms used in this specification, such as "upper", "lower", "left", "right", "front", "back", "middle" and "one", are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0040] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An anti-deviation structure for an adjustable fitness sit-up board, characterized in that, It includes a main frame, a support frame and an adjustment frame. One end of the support frame is hinged to the main frame. A serrated plate is provided on the main frame, and a number of card slots are formed along the length direction of the serrated plate. One end of the adjustment frame is hinged to the bottom of the support frame. The other end of the adjustment frame is provided with an anti-deviation wheel that cooperates with the card slots of the serrated plate. The anti-deviation wheel can slide along the length direction of the serrated plate, and the anti-deviation wheel is in a "concave" shape.

2. The anti-deviation structure of an adjustable fitness sit-up board according to claim 1, characterized in that, A groove is annularly provided in the middle of the anti-deviation wheel, and the anti-deviation wheel is slidably fitted with the serrated plate through its groove.

3. The anti-deviation structure of an adjustable fitness sit-up board according to claim 1, characterized in that, Two symmetrically arranged serrated plates are provided on the main frame, and the number of anti-deviation wheels is two. The two anti-deviation wheels are respectively arranged on both sides of the other end of the adjustment frame.

4. The anti-deviation structure of an adjustable fitness sit-up board according to claim 1, characterized in that, The anti-deviation wheel is fixedly arranged at the other end of the adjustment frame or rotatably arranged at the other end of the adjustment frame.

5. The anti-deviation structure of an adjustable fitness sit-up board according to claim 4, characterized in that, A first shaft hole is formed at the other end of the adjustment frame. A first rotating shaft is rotatably provided in the first shaft hole, and the two anti-deviation wheels are fixedly arranged at both ends of the first rotating shaft.

6. The anti-deviation structure of an adjustable fitness sit-up board according to claim 4, characterized in that, A first shaft hole is formed at the other end of the adjustment frame. A first rotating shaft is fixedly provided in the first shaft hole, and the two anti-deviation wheels are respectively rotatably arranged at both ends of the first rotating shaft.

7. The anti-deviation structure of an adjustable fitness sit-up board according to claim 1, characterized in that, A "冂" - shaped part or a guard plate is provided at the bottom of the support frame. A second rotating shaft is provided between the "冂" - shaped part or the guard plate. One end of the adjustment frame is hinged to the bottom of the support frame through the second rotating shaft.

8. The anti-deviation structure of an adjustable fitness sit-up board according to claim 7, characterized in that, The second rotating shaft is located at the middle position of the bottom of the support frame.

9. The anti-deviation structure of an adjustable fitness sit-up board according to any one of claims 1 to 8, characterized in that, Handles are further provided on both sides of the adjustment frame.

10. The anti-deviation structure of an adjustable fitness sit-up board according to any one of claims 1 to 8, characterized in that, An anti - collision column is provided above the adjustment frame or below the support frame.

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