A foldable horizontal bar

Abstract

The utility model discloses a single bar of collapsible, including main pole and setting two support base of main pole lower extreme both sides, the support base includes the sliding sleeve of setting in main pole lower extreme and the support rod of pivot connection in the both sides of sliding sleeve, the multistage adjustable of realizing through first pin shaft subassembly between main pole with sliding sleeve, the opening and closing direction of both sides support rod is perpendicular to the width direction of main pole, the wing plate of sliding sleeve outer end surface is extended along the swing direction of support rod, the edge position of wing plate is equipped with a plurality of limit slot, be equipped with the second pin shaft subassembly of using the limit slot cooperation on support rod, when the second pin shaft subassembly with different limit slot cooperation, can realize the opening and closing angle adjustable of both sides support rod. The utility model has the advantage that makes the adjustable support angle of support rod under the premise of guaranteeing the overall structural strength of single bar.

Description

Technical Field

[0001] This utility model belongs to the field of exercise equipment technology, and in particular relates to a foldable horizontal bar. Background Technology

[0002] The existing horizontal bar cannot be adjusted in height to accommodate users of different heights, making it inconvenient for staff to use. Furthermore, the existing horizontal bar cannot be stored when not in use, requiring a large area to be placed, which affects the overall space utilization.

[0003] Chinese patent application No. 202021868828.6 discloses a folding horizontal bar, including a support frame, a folding rod, a support rod, and a connecting frame. The support frame and the support rod are connected by a first hinge sleeve, and the folding rod and the support rod are connected by a second hinge sleeve. The first hinge sleeve and the second hinge sleeve are respectively provided with a first fixing knob and a second fixing knob. A limit sleeve is provided between the first hinge sleeve and / or the second hinge sleeve and the support rod.

[0004] In the above technical solution, the inner diameter of the limiting sleeve is reduced by turning the first or second fixing knob, thereby clamping the support rod. However, in the above technical solution, the clamping force provided by the limiting sleeve depends on the frictional force generated when the limiting sleeve clamps the support rod after elastic deformation. However, long-term repeated clamping will cause local fatigue of the limiting sleeve and irreversible plastic deformation, resulting in a decline in the clamping force of the limiting sleeve. Furthermore, if the user does not turn the first and second fixing knobs to the critical torque, the clamping structure may only undergo partial deformation. It may appear to be locked when stationary, but the entire support frame will fail instantly upon impact, causing the user to fall due to gravitational acceleration and resulting in a safety accident. In the above technical solution, although the limiting sleeve can be limited to a specific position by a fixing sleeve when the entire support frame fails instantly, the entire support frame is already in an unstable state at this time. The fixing sleeve is subjected to impact load at this time, rather than static design load, which makes it very easy to bounce and displace, and there is still a safety hazard. Summary of the Invention

[0005] To address the shortcomings of existing technologies, a foldable horizontal bar is provided.

[0006] This utility model is achieved using the following technical solution:

[0007] A foldable horizontal bar includes a main bar and two support bases disposed on both sides of the lower end of the main bar. Each support base includes a sliding sleeve fitted onto the lower end of the main bar and support rods pivotally connected to both sides of the sliding sleeve. The main bar and the sliding sleeve are multi-level adjustable via a first pin assembly. The opening and closing direction of the support rods on both sides is perpendicular to the width direction of the main bar. A wing plate extends from the outer end face of the sliding sleeve along the swing direction of the support rod. Several limiting grooves are formed on the edge of the wing plate. A second pin assembly is provided on the support rod to cooperate with the limiting grooves. When the second pin assembly cooperates with different limiting grooves, the opening and closing angle of the support rods on both sides can be adjusted.

[0008] The user first opens the support rods on both sides and engages the second pin assembly on the support rod with the limiting groove. The user then adjusts the main bar to a suitable height according to their needs and fixes it with the first pin assembly after adjusting the main bar and the sliding sleeve. When the bar needs to be folded, the user disengages the second pin assembly from the limiting groove, which allows the two support rods to close. The user then unlocks the main bar with the first pin assembly, placing it in a retracted state with the support base.

[0009] Among them, the limiting grooves corresponding to the two support rods should be symmetrically positioned to ensure the balance of the supporting forces on both sides of the main bar.

[0010] The mechanical engagement of the support rod opening and closing system is achieved by engaging the second pin assembly within the limiting groove. This mechanical limiting replaces the frictional locking caused by elastic deformation. Under the gravity of the main bar, the two side support rods abut against the limiting grooves on the wing plate, thereby enhancing the overall locking capability of the structure through gravity. This results in better safety performance and a longer service life for the main bar after it is adjusted to the appropriate size.

[0011] Preferably, the wing plate includes a lateral extension portion as the lower end face and an inclined portion located at the upper end of the lateral extension portion. The inclined portion is closed upward from the lateral extension portion. The lower end face of the wing plate is perpendicular to the length direction of the sliding sleeve. The limiting groove is arranged along the length direction of the lateral extension portion.

[0012] By designing the shape of the wing plate to form a reinforcing rib structure between it and the sliding sleeve, the connection strength at that point is guaranteed.

[0013] Preferably, the wing plates are provided in four sets and symmetrically arranged on both sides of the sliding sleeve. A baffle is connected between the wing plates on the same side. The baffle is located at the inclined part of the wing plate, thereby limiting the limit opening angle of the support rods on both sides and further enhancing the structural stability of the support base.

[0014] Preferably, the support rod is pivotally connected to the wing plate, the pivot is located at the upper end of the inclined surface, the distance between the second pin assembly and the pivot is L1, the support rod is provided with a waist hole, and the second pin assembly passes through the waist hole.

[0015] When the user needs to unlock the support rod, the reset component moves the second pin assembly away from the wing plate, thereby unlocking the support rod. By changing the force position of the second pin assembly, the self-locking effect is actively released when L1 is greater than the length of the inclined surface, realizing a physical intelligent unlocking method of "unloading first, then separating". This allows the support rod to maintain self-locking when the bar is fixed, and to be unlocked through a simple operation when unlocking is required. The structure is reliable and the operation is simple.

[0016] Preferably, a reset member is provided between the second pin assembly and the support rod, which enables the length of L1 to be adjustable. The force of the reset member causes the second pin assembly to be located in the waist hole at the extreme position near the lateral extension.

[0017] By utilizing a reset element, the force exerted by the reset element on the second pin assembly is always directed towards the lateral extension, thereby ensuring that the second pin assembly remains self-locking when the bar is fixed; wherein, the reset element can be a tension spring or a combination of magnets with opposite magnetic poles.

[0018] Preferably, the lateral extension is a curved structure, the distance between the limiting groove and the pivot is L2, and the length of L2 formed by each limiting groove is the same.

[0019] The lateral extension can be a curved structure formed by two relatively deflected straight edges, or it can be a curved structure formed by an arc edge centered on the pivot and with L2 as the radius, thereby ensuring that the torque on the second pin assembly is constant when it is in different limiting grooves.

[0020] Preferably, the pivot is a threaded rod that passes through both the wing plate and the support rod. Locking nuts are provided at both ends of the threaded rod, so that after the overall adjustment of the single bar is completed, the pivot connection structure at this point can be transformed into a fixed structure, further ensuring the overall structural strength and stability of the single bar.

[0021] Preferably, the first pin assembly includes a plurality of pin holes arranged in an array along the height direction of the main bar on the main bar and the sliding sleeve, and a pin that is used in conjunction with the pin holes. The pin passes through the pin holes and has a first locking member at both ends in the axial direction.

[0022] The first locking component can be a threaded section and a nut used in conjunction with the pin shaft at both ends of the axial direction, or it can be a knob and a pin shaft used in conjunction with each other and the two are fixed by fastening screws, so as to lock the first pin shaft assembly in the pin hole by axial locking force, thereby ensuring the structural strength between the main rod and the sliding sleeve.

[0023] Preferably, the second pin assembly includes a locking rod passing through the waist hole and second locking members disposed at both axial ends of the locking rod.

[0024] The second locking component can be a locking protrusion with an arc surface on its outer circular surface that matches the limiting groove; or it can be a locking nut located on the outside of the wing plate, which clamps the outer circular surface of the support rod and the inner surface of the wing plate together by the locking force provided by the thread.

[0025] Preferably, a reinforcing base is provided between the support rods along the width direction of the main bar, thereby increasing the counterweight on both sides of the support rods and preventing the bar from tipping over.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] By using a mechanical interlocking design between the support rod and the wing plate, a geometric self-locking mechanism replaces friction dependence, forming a self-reinforcing structure under gravity. Furthermore, the rigid engagement between the wing plate limiting groove and the pin eliminates the risk of metal fatigue, thereby enabling an adjustable support angle for the support rod. This expands the user base while ensuring the overall structural strength of the monobar. The integration of the wing plate baffle and the reinforced base further ensure the overall structural strength of the monobar.

[0028] The second locking component is linked by a waist hole, and the lock is unlocked by physical means. First, the self-locking effect of the reset component is released, and then the second locking component is separated from the wing plate. The operation is simplified to a single linear action, which makes it easy for users to operate and use while ensuring the overall structural strength of the bar. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a foldable single bar according to the present invention;

[0030] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0031] Figure 3 This is a partial exploded structural diagram of the main rod, sliding sleeve, and support rod in this utility model;

[0032] Figure 4 This is a partial cross-sectional view of the main rod, sliding sleeve, and support rod in this utility model.

[0033] Figure 5This is a schematic diagram of the structure of the tube sleeve of this utility model;

[0034] Figure 6 This is a schematic diagram of the sliding sleeve in this utility model;

[0035] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0036] Figure 8 This is a schematic diagram of the exploded structure of Embodiment 2 of this utility model.

[0037] Reference numerals: 1. Main bar; 2. Support base; 10. Vertical bar; 101. First fixing hole; 11. Horizontal bar; 12. First fixing shaft; 121. Locking nut; 13. Torx knob; 20. Sliding sleeve; 201. Second fixing hole; 202. Slot; 21. Wing plate; 211. Lateral extension; 212. Sloping part; 22. Baffle; 23. Limiting groove; 24. Support rod; 241. Waist hole; 25. Threaded rod; 26. Locking nut; 27. Locking rod; 28. Arc-shaped knob; 29. ​​Tension spring; 30. Reinforced base; 31. Pipe sleeve; 311. Fitting part; 312. Buckle; 313. Outward-facing part; 32. Seal; 40. Fixing pillow; 401. Support protrusion; 402. Support protrusion 401; 41. First mounting hole; 42. Second mounting hole; 43. Mounting screw; 44. Mounting knob. Detailed Implementation

[0038] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] like Figure 1 As shown, this embodiment discloses a foldable horizontal bar, including a main bar 1 and two support bases 2 disposed on both sides of the lower end of the main bar 1, as follows. Figure 2 As shown, the main bar 1 includes two vertically spaced bars 10 and a horizontal bar 11 fixed between the two vertical bars 10. The horizontal bar 11 is fixed to the vertical bars 10 on both sides by fastening screws. The support base 2 includes two sliding sleeves 20 sleeved at the lower ends of the two vertical bars 10 and support rods 24 pivotally connected to both sides of the sliding sleeves 20. The two vertical bars 10 and the sliding sleeves 20 correspond one-to-one and are multi-level adjustable through the first pin assembly. The opening and closing direction of the support rods 24 on both sides is perpendicular to the width direction of the main bar 1. A reinforcing base 30 is provided between the support rods 24 along the width direction of the main bar 1. The support rods 24 and the reinforcing base 30 can be assembled by welding or screw fixing, which is not limited here. When the user needs to use the single bar for exercise or rehabilitation training, he / she can hold the horizontal bar 11 above and perform the exercise or rehabilitation training according to his / her own needs.

[0041] The vertical bar 10, the sliding sleeve 20, and the support rod 24 are all hollow tubes. The cross-sections of the vertical bar 10, the sliding sleeve 20, and the support rod 24 can be square or circular, which is not limited here. The horizontal bar 11 is a solid round rod.

[0042] The first pin assembly includes a plurality of first fixing holes 101 arranged in an array along the height direction of the main bar 1 on the main bar 1, two second fixing holes 201 arranged on the sliding sleeve 20, and a pin. The first fixing holes 101 and the second fixing holes 201 are combined to form a pin hole for hole-shaft cooperation. The pin is a first fixing shaft 12. Two first fixing shafts 12 are arranged vertically at intervals in each sliding sleeve 20 and between it and the vertical bar 10, thereby ensuring the support strength of the vertical bar 10. After the first fixing holes 101 and the second fixing holes 201 are aligned, the first fixing shaft 12 is inserted to fix the height position of the main bar 1 and block the physical degree of freedom of the main bar 1. The first locking members are provided at both ends of the first fixing shaft 12. The first locking members include a stop nut 121 arranged on the inner side of the first fixing shaft 12 relative to the main bar 1 and a plum blossom knob 13 arranged on the outer side and threaded with the end of the first fixing shaft 12. The stop nut 121 has the same structure as the prior art.

[0043] After the user inserts the vertical bar 10 of the main bar 1 into the sliding sleeve 20 and adjusts it to a suitable height, the first fixed shaft 12 with the stop nut 121 passes through the first fixed hole 101 and the second fixed hole 201, and is tightened and fixed to the first fixed shaft 12 by the plum blossom knob 13. The plum blossom knob 13 is located on the outside of the main bar 1, so as to prevent the user from accidentally touching the plum blossom knob 13 during use and damaging the preload between the first pin assembly.

[0044] like Figure 3 As shown, the outer end face of the sliding sleeve 20 extends with a wing plate 21 along the swing direction of the support rod 24. The wing plate 21 has four sets symmetrically arranged on both sides of the sliding sleeve 20. The wing plate 21 has a right-angled trapezoidal structure, including a lateral extension 211 located on the lower long side of the trapezoid and an inclined portion 212 located on the hypotenuse. The inclined portion 212 converges upwards from the lateral extension 211. A baffle 22 is integrally formed on the wing plate 21 to limit the maximum opening and closing position of the support rod 24. The baffle 22 is perpendicular to the two inclined portions 212 on the same side. The lateral extension 211 has a curved structure. The lateral extension 211 of the wing plate 21 has a downward-opening limiting groove 23. The limiting groove 23 is arranged along the length direction of the lateral extension 211. Figure 6 As shown, the distance between the limiting groove 23 and the pivot is L2, and the length of L2 formed by each limiting groove 23 is the same.

[0045] The support rod 24 is pivotally connected to the wing plate 21. The pivot is located at the boundary between the upper short side of the wing plate 21 and the inclined surface 212. The pivot is a threaded rod 25 that passes through both the wing plate 21 and the support rod 24. Locking nuts 26 are provided at both axial ends of the threaded rod 25. After adjusting the opening angle of the support rods 24 on both sides, tightening the locking nuts 26 shortens the axial distance, thereby using the friction between the locking nuts 26 and the surface of the wing plate 21 to prevent the pivot from rotating. Figure 4 As shown, a waist hole 241 is provided on the support rod 24, and a second pin assembly is provided on the support rod 24 through the waist hole 241. When the second pin assembly is engaged with different limiting grooves 23, the opening and closing angle of the support rods 24 on both sides can be adjusted.

[0046] The second pin assembly includes a locking rod 27 that passes through the waist hole 241 and a second locking member disposed at both ends of the locking rod 27 in the axial direction. The second locking member is an arc-shaped knob 28 threaded to both ends of the locking rod 27 in the axial direction. The threads of the arc-shaped knobs 28 at both ends turn in opposite directions. When the arc-shaped knobs 28 at both ends are tightened, the end face of the arc-shaped knobs 28 deforms the wing plate 21 and clamps the outer surface of the support rod 24. At this time, the threaded rod 25 is engaged with the limiting groove 23 through its own outer circular surface.

[0047] When the locking rod 27 is engaged in the limiting groove 23 located on the side near the sliding sleeve 20, the support rod 24 is parallel to the axis of the sliding sleeve 20.

[0048] like Figure 6 As shown, the distance between the locking rod 27 and the pivot is L1. The locking rod 27 passes through the waist hole 241 and is provided with a reset member between it and the support rod 24, which allows the length of L1 to be adjusted. Figure 4 As shown, the reset component is a tension spring 29 with the same structure as the prior art. The tension spring 29 is located inside the support rod 24 and is connected between the locking rod 27 and the threaded rod 25 through hooks at both ends. The tension of the tension spring 29 causes the second pin assembly to be located in the waist hole 241 near the extreme position of the lateral extension 211.

[0049] When the user needs to change the opening angle of the two support rods 24, the arc-shaped knob 28 is turned in the opposite direction and the arc-shaped knob 28 is pulled down so that it drives the tension spring 29 to lengthen through the locking rod 27, thereby increasing the length of L1 so that it can pass over the lateral extension 211 of the wing plate 21. After the two support rods 24 are at the appropriate opening angle, the tension spring 29 pulls the locking rod 27 so that it re-enters the limiting groove 23 and is engaged with the limiting groove 23.

[0050] like Figure 5As shown, the upper end of the sliding sleeve 20 is provided with a tube opening sleeve 31, which fills the gap between the vertical bar 10 and the sliding sleeve 20 while ensuring the smoothness of the movement between them. The tube opening sleeve 31 includes a fitting part 311 embedded in the vertical sleeve and an outwardly turned part 313 extending outward from the vertical sleeve. The distance between the outwardly turned part 313 and the fitting part 311 matches the wall thickness of the sliding sleeve 20. The fitting part 311 is provided with a buckle 312 for engaging with the sliding sleeve 20. The sliding sleeve 20 is provided with a slot 202 for engaging with the buckle 312. The upper end of the support rod 24 and the lower end of the vertical bar 10 are provided with a sealing 32.

[0051] Example 2

[0052] The difference between this embodiment and Embodiment 1 is that: Figure 7 , Figure 8 As shown, the horizontal bar 11 and the vertical bar 10 are detachably connected by a fixing pillow 40. The horizontal bar 11 located between the two vertical bars 10 is a bent tube structure. The vertical bar 10 and the horizontal bar 11 are respectively provided with a first mounting hole 41 and a second mounting hole 42 for the mounting screw 43 to pass through. There are two sets of the second mounting hole 42 along the vertical direction, and several sets of the first mounting hole 41 along the length of the vertical bar 10, so that the installation height of the horizontal bar 11 can be adjusted.

[0053] The fixed pillow 40 is clamped between the two ends of the horizontal bar 11 and the vertical bar 10. The contact surface between the fixed pillow 40 and the horizontal bar 11 is a matching arc-shaped groove structure 402. The mounting surface between the fixed pillow 40 and the vertical bar 10 is provided with a support protrusion 401. The support protrusion 401 can be horizontally embedded in the first mounting hole 41. The mounting screw 43 passes through the second mounting hole 42, the support protrusion 401 on the fixed pillow 40, and the first mounting hole 41 in sequence, and is threaded with the mounting knob 44.

Claims

1. A foldable horizontal bar, comprising a main bar and two support bases disposed on both sides of the lower end of the main bar, characterized in that: The support base includes a sliding sleeve fitted onto the lower end of the main bar and support rods pivotally connected to both sides of the sliding sleeve. The main bar and the sliding sleeve are multi-level adjustable via a first pin assembly. The opening and closing direction of the support rods on both sides is perpendicular to the width direction of the main bar. A wing plate extends from the outer end face of the sliding sleeve along the swing direction of the support rod. Several limiting grooves are formed at the edge of the wing plate. A second pin assembly is provided on the support rod to cooperate with the limiting grooves. When the second pin assembly cooperates with different limiting grooves, the opening and closing angle of the support rods on both sides can be adjusted.

2. The foldable horizontal bar according to claim 1, characterized in that: The wing plate includes a lateral extension portion as the lower end face and an inclined portion located at the upper end of the lateral extension portion. The inclined portion is closed upward from the lateral extension portion. The lower end face of the wing plate is perpendicular to the length direction of the sliding sleeve. The limiting groove is arranged along the length direction of the lateral extension portion.

3. A foldable horizontal bar according to claim 2, characterized in that: The wing plates are provided in four sets and symmetrically arranged on both sides of the sliding sleeve. A baffle is connected between the wing plates on the same side, and the baffle is located at the inclined part of the wing plate.

4. A foldable horizontal bar according to claim 3, characterized in that: The support rod is pivotally connected to the wing plate, the pivot is located at the upper end of the inclined surface, the distance between the second pin assembly and the pivot is L1, the support rod is provided with a waist hole, and the second pin assembly passes through the waist hole.

5. A foldable horizontal bar according to claim 4, characterized in that: A tightening member is provided between the second pin assembly and the support rod, which allows the length of L1 to be adjusted. The force of the tightening member causes the second pin assembly to be located in the waist hole near the extreme position of the lateral extension.

6. A foldable horizontal bar according to claim 5, characterized in that: The lateral extension is a curved structure, and the distance between the limiting groove and the pivot is L2. The length of L2 formed by each limiting groove is the same.

7. A foldable horizontal bar according to any one of claims 1-6, characterized in that: The pivot is a threaded rod that passes through both the wing plate and the support rod, and locking nuts are provided at both ends of the threaded rod along its axial direction.

8. A foldable horizontal bar according to claim 7, characterized in that: The first pin assembly includes a plurality of pin holes arranged in an array along the height direction of the main bar on the main bar and the sliding sleeve, and a pin that is used in conjunction with the pin holes. The pin passes through the pin holes and has a first locking member at both ends in the axial direction.

9. A foldable horizontal bar according to claim 4 or 5, characterized in that: The second pin assembly includes a locking rod passing through the waist hole and second locking members disposed at both axial ends of the locking rod.

10. A foldable horizontal bar according to claim 1, characterized in that: A reinforcing base is provided between the support rods, which is arranged along the width direction of the main bar.

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