A treadmill with height adjustable handrails

Abstract

The utility model belongs to treadmill technical field especially relates to a handrail height adjustable treadmill. A handrail height adjustable treadmill, include: frame, be equipped with the running track on the frame, the vertical pipe subassembly of symmetrical setting in the both sides of frame front end, the vertical pipe subassembly contains the main pipe of being fixed in the frame and the branch pipe of being retractable inserted in the main pipe, the branch pipe top end stretches to the opening upper side of main pipe and is equipped with the handrail, the console is connected between two branch pipes, height locking mechanism, it contains the locking sleeve of being located in the main pipe top end opening and the seat pipe clamp of being covered in the locking sleeve outside, the locking sleeve adopts the flexible material to make and is covered in the outer wall of branch pipe, when the seat pipe clamp clamps the locking sleeve, the locking sleeve generates radial elastic deformation and clamps the outer wall of branch pipe, realizes the mechanical locking of branch pipe lifting stroke. The utility model has the advantages of can adjust handrail height, and the service life of vertical pipe subassembly is longer.

Description

Technical Field

[0001] This utility model belongs to the field of treadmill technology, and in particular relates to a treadmill with adjustable handrail height. Background Technology

[0002] The current mainstream treadmill design can be summarized as follows: the control panel and handrails are integrated and fixed, with the handrails rigidly connected to the treadmill frame via left and right uprights. While this structure offers advantages such as simple design and low manufacturing cost, and can meet basic exercise needs, it suffers from significant ergonomic flaws: First, the fixed height of the control panel makes the user interface unsuitable for users of different heights (especially those under 160cm and over 185cm), resulting in uncomfortable viewing angles and inconvenient operation. Second, the lack of adjustable handrail height makes it difficult for users to meet the diverse needs of those between 150-190cm in height when performing post-run stretching exercises (such as leg presses), thus restricting limb movement. Utility Model Content

[0003] To address the shortcomings of existing technologies, a treadmill with adjustable handrail height is provided.

[0004] This utility model is achieved by the following technical solution: a treadmill with adjustable handrail height, comprising:

[0005] A frame, on which a running platform is provided;

[0006] The riser assembly is symmetrically arranged on both sides of the front end of the frame. The riser assembly includes a main pipe fixed to the frame and a secondary pipe that can be telescopically inserted into the main pipe. The top of the secondary pipe extends to the upper side of the opening of the main pipe and is provided with a handrail.

[0007] The control console is connected between the two secondary pipes;

[0008] The height locking mechanism includes a locking sleeve located at the top opening of the main tube and a seat tube clamp covering the outside of the locking sleeve. The locking sleeve is made of flexible material and is sleeved on the outer wall of the secondary tube. When the seat tube clamp clamps the locking sleeve, the locking sleeve undergoes radial elastic deformation and clamps the outer wall of the secondary tube, thereby achieving mechanical locking of the lifting stroke of the secondary tube.

[0009] During use, the user can open the seat post clamp to loosen the locking sleeve, at which point the auxiliary tube can be raised or lowered. When it is raised or lowered to a suitable height, the seat post clamp can be locked to tighten the locking sleeve.

[0010] The tube clamp can be any existing tube clamp that can clamp or release the tube fitting.

[0011] The flexible material of the locking sleeve can be rubber, plastic, or other elastically deformable flexible materials.

[0012] This solution achieves mechanical locking of the sub-tube's lifting stroke by clamping or releasing the locking sleeve with the seat tube clamp. This allows for height adjustment of the handrail and stepless locking of the sub-tube's lifting stroke. Furthermore, the locking sleeve, made of flexible material, is located between the seat tube clamp and the sub-tube, converting the linear clamping force of the seat tube clamp into a uniformly distributed radial compressive stress, resulting in more even circumferential stress on the outer wall of the sub-tube. The locking sleeve's location between the sub-tube and the seat tube clamp effectively prevents fretting wear between them, extending the sub-tube's service life.

[0013] Preferably, the locking sleeve includes a radial clamping section and an axial extending section. A radially outwardly extending annular limiting flange is provided between the radial clamping section and the axial extending section. The bottom end of the annular limiting flange is supported on the open end face of the main tube. The seat tube is sleeved outside the radial clamping section and supported on the top end of the annular limiting flange.

[0014] The axial extension section extends into the main pipe, the outer wall of the axial extension section is fitted with the inner wall of the main pipe, and the inner wall of the axial extension section is fitted with the outer wall of the secondary pipe.

[0015] The annular limiting flange can restrict the position of the locking sleeve on the main pipe and also restrict the position of the seat tube clamped on the locking sleeve. It extends into the main pipe through the axial extension section, and the axial extension section fits with the main pipe and the auxiliary pipe, thereby increasing the stability of the auxiliary pipe.

[0016] Preferably, the locking sleeve is provided with a plurality of axially extending gaps, the gaps penetrating the inner and outer walls of the locking sleeve and penetrating the top of the locking sleeve, the gaps dividing the locking sleeve into a plurality of elastically deformable lobes.

[0017] By setting a gap that extends through the top of the locking sleeve, the locking sleeve is divided into several elastically deformable flaps, making it easier for the locking sleeve to deform under the action of the seat tube clamp. This allows all the flaps to contract radially inward simultaneously to clamp the secondary tube when the seat tube clamp is tightened, and also allows all the flaps to release radially outward simultaneously to release the secondary tube when the seat tube clamp is loosened.

[0018] Preferably, the plurality of the spacers are evenly spaced on the locking sleeve along the circumferential direction of the locking sleeve.

[0019] Uniformly spaced gaps can better distribute radial compressive stress evenly.

[0020] Preferably, the gap includes an expansion section and a straight section extending along the axial direction of the riser assembly. The straight section passes through a radial clamping section and a portion of the axial extension section, with one end of the straight section penetrating the top of the radial clamping section. The expansion section is located at the other end of the straight section and in the region of the axial extension section. The width of the expansion section is greater than the width of the straight section.

[0021] The gap passes through the radial clamping section and the axial extension section, and has a wider expansion section at one end of the straight section, which further facilitates the elastic deformation of the entire locking sleeve, thereby allowing for better clamping or loosening of the secondary tube.

[0022] Preferably, at least one buckle is provided on the outer wall of the bottom of the axial extension section, and the main pipe is provided with a buckle hole for engaging with the buckle.

[0023] The locking sleeve is fixed to the main pipe by the snap-fit ​​between the buckle and the buckle hole. The lifting and sliding of the secondary pipe will not cause the locking sleeve to move, making the locking sleeve more stable.

[0024] Preferably, the axial extension section has axially extending deformation seams on both sides of the buckle and extending through the bottom of the axial extension section. The deformation seams divide the area where the buckle is located into deformable pieces that can be independently elastically deformed. The thickness of the deformable pieces is less than the thickness of the axial extension section itself.

[0025] The above-mentioned design facilitates the deformation of the deformable sheet, making it easier for the buckle to engage in the buckle hole and for the locking sleeve to be installed on the main pipe.

[0026] Preferably, the inner wall of the locking sleeve includes a ribbed region and a smooth region without ribs, the maximum thickness of the ribbed region is the same as the thickness of the smooth region, the ribbed region is located on the lower side of the smooth region, and the straight segment of the gap passes through the smooth region.

[0027] The smooth area, located at the upper end of the ribbed area, is the primary deformation region. Its inner wall allows for more comprehensive contact with the secondary tube, resulting in a more uniform radial clamping force on the secondary tube when clamped by the seat tube clamp. The ribbed area, located below, uses axially extending ribs to form a mechanical transmission path, directionally converting the radial contraction deformation energy of the locking sleeve into axial compressive stress. This avoids the clamping force attenuation caused by circumferential stress diffusion, which is common in traditional smooth contact surfaces. Therefore, although the ribbed area is far from the seat tube clamp, it still provides a slight clamping effect and anti-slip performance on the secondary tube. Furthermore, the smooth and ribbed areas facilitate the demolding of the locking sleeve during production.

[0028] Preferably, the seat clamp includes a clamping ring with an opening, the clamping ring being C-shaped, and a connecting lug integrally formed with the clamping ring at the opening of the clamping ring. A screw passes through the connecting lug, one end of the screw is threaded with a nut, and the other end of the screw is rotatably connected to an eccentric handle; the locking sleeve has a thickened portion corresponding to the opening of the clamping ring, and the thickened portion abuts against the connection between the clamping ring and the connecting lug.

[0029] After the eccentric handle is turned, the distance between the two connecting ears will decrease, which will reduce the inner diameter of the entire clamping ring and thus clamp the secondary tube. The area with the greatest clamping force is between the connecting ears and the clamping ring. Therefore, in order to avoid damage to the secondary tube, a thickened part is provided on the locking sleeve to protect the secondary tube.

[0030] Preferably, the bottom surface of the axial extension is inclined.

[0031] The tilted design makes it easier to insert the locking sleeve into the main tube.

[0032] Compared with existing technologies, the advantages of this invention are as follows: This solution achieves mechanical locking of the secondary tube's lifting stroke by clamping or releasing the locking sleeve with the seat tube clamp, thereby allowing for adjustment of the handrail height and stepless locking of the secondary tube's lifting stroke. Furthermore, the locking sleeve in this solution is located between the seat tube clamp and the secondary tube, and is made of flexible material, converting the linear clamping force of the seat tube clamp into a uniformly distributed radial compressive stress, resulting in more even circumferential stress on the outer wall of the secondary tube. Moreover, the locking sleeve's location between the secondary tube and the seat tube clamp effectively prevents fretting wear between the secondary tube and the locking sleeve, extending the service life of both the secondary and main tubes. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the utility model;

[0034] Figure 2 This is an exploded structural diagram of the riser assembly;

[0035] Figure 3 This is a cross-sectional view of the riser assembly;

[0036] Figure 4 This is a structural diagram of the locking sleeve and the main tube;

[0037] Figure 5 Enlarged view of the locking sleeve and main tube;

[0038] Figure 6 for Figure 5 A schematic diagram of the structure in which the locking sleeve is fitted with a seat clamp;

[0039] Figure 7 This is a schematic diagram of the locking sleeve structure;

[0040] Figure 8 This is a cross-sectional view of the locking sleeve;

[0041] Figure 9 This is a schematic diagram of the deformable lobe structure.

[0042] Reference numerals: 1. Frame; 2. Running board; 3. Riser assembly; 31. Main pipe; 311. Buckle hole; 32. Secondary pipe; 4. Handrail; 41. Crossbeam; 42. Control console; 5. Seat tube clamp; 51. Clamping ring; 52. Connecting lug; 53. Screw; 54. Eccentric handle; 55. Nut; 6. Locking sleeve; 61. Radial clamping section; 611. Thickened section; 62. Annular limiting flange; 63. Axial extension section; 71. Expansion joint; 72. Deformation piece; 73. Buckle; 8. Spacing joint; 81. Straight section; 82. Expanding section; 91. Smooth area; 92. Ribbed area; 10. Deformation petal. Detailed Implementation

[0043] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0044] like Figure 1 and Figure 2 As shown, this embodiment discloses a treadmill with adjustable handrail height, including a frame 1, a running platform 2 on the frame 1, and upright tube assemblies 3 on both sides of the front end of the frame. The upright tube assembly 3 includes a main tube 31 and a secondary tube 32 fixed to the frame 1. The main tube 31 and the secondary tube 32 have rectangular cross-sectional shapes and are both hollow. The shape of the secondary tube 32 is adapted to the main tube 31, and the size of the secondary tube 32 is smaller than the size of the main tube 31, allowing the secondary tube 32 to be telescopically inserted into the main tube 31. The top end of the secondary tube 32 extends out of the main tube 31, and a handrail 4 is fixed to the top of the secondary tube 32. A crossbeam 41 is provided between the two secondary tubes 32, and a control panel 42 is provided on the crossbeam 41. The control panel 42 can be any existing control panel capable of controlling the speed and incline of the treadmill.

[0045] like Figures 2 to 9 As shown, a height locking mechanism is provided at the open end of the main pipe 31. The height locking mechanism includes a locking sleeve 6 located at the top opening of the main pipe 31 and a seat tube clamp 5 covering the outside of the locking sleeve 6. The locking sleeve 6 has a rectangular cross-sectional shape and is adapted to the shape of the main pipe 31 and the secondary pipe 32. The locking sleeve 6 is made of a flexible material such as rubber or plastic and is fitted onto the outer wall of the secondary pipe 32.

[0046] The locking sleeve 6 includes, from bottom to top, a radial clamping section 61 and an axial extension section 63. A radially outwardly extending annular limiting flange 62 is provided between the radial clamping section 61 and the axial extension section 63. The size of the annular limiting flange 62 is larger than the size of the main pipe 31, so that the bottom end of the annular limiting flange 62 can be supported on the open end face of the main pipe 31. The seat tube clamp 5 is sleeved on the outside of the radial clamping section 61 and supported on the top end of the annular limiting flange 62. The axial extension section 63 extends into the main pipe 31, with its outer wall fitting against the inner wall of the main pipe 31, and its inner wall fitting against the outer wall of the secondary pipe 32.

[0047] The bottom surface of the axial extension 63 is inclined, with its rear side lower than its front side, which facilitates the insertion of the locking sleeve 6 into the main tube 31.

[0048] Two latches 73 are provided on the outer wall of the bottom of the axial extension section 63. The two latches 73 are located on the front and rear sides of the axial extension section 63, respectively. The front and rear side walls of the main pipe 31 are provided with latch holes 311 that engage with the latches 73. On both sides of the latches 73, there are expansion joints 71 that extend axially and penetrate through the bottom of the axial extension section. The expansion joints 71 divide the area where the latches 73 are located into deformable pieces 72 that can be elastically deformed independently. The thickness of the deformable pieces 72 is less than the thickness of the axial extension section 63 itself.

[0049] like Figure 7 , Figure 8 and Figure 9 As shown, each of the four side walls of the locking sleeve 6 has an axially extending slot 8, and the four slots 8 are evenly spaced along the circumferential direction of the locking sleeve 6. The slots 8 penetrate the inner and outer walls of the locking sleeve 6 and penetrate the top of the locking sleeve 6, dividing the upper part of the locking sleeve 6 into four elastically deformable lobes 10.

[0050] The gap 8 includes an expansion section 82 and a straight section 81 extending along the axial direction of the riser assembly 3. The straight section 81 passes through the upper portion of the radial clamping section 61 and the axial extension section 63, and the upper end of the straight section 81 passes through the top of the radial clamping section 61. The expansion section 82 is located at the lower end of the straight section 81 and in the region of the axial extension section 63. The expansion section 82 is circular or elliptical, and the width of the expansion section 82 is greater than the width of the straight section 81.

[0051] like Figure 8 As shown, the inner wall of the locking sleeve 6 includes a ribbed region 92 with ribs and a smooth region 91 without ribs. The ribs in the ribbed region 92 are evenly spaced in the circumferential direction. The maximum thickness of the ribbed region 92 is the same as the thickness of the smooth region 91. The ribbed region 92 is located below the smooth region 91. The straight segment 81 of the gap 8 passes through the smooth region 91, and the extended segment 82 of the gap 8 is located in the ribbed region 92.

[0052] like Figure 5 and Figure 6 As shown, the seat pipe clamp 5 includes a clamping ring 51 with an opening. The clamping ring is C-shaped, and its cross-section is adapted to the riser assembly. The opening of the clamping ring 51 is provided with a connecting ear 52 integrally formed with the clamping ring 51. The connecting ear 52 extends outward, and a screw 53 passes between the two connecting ears 52. One end of the screw 53 is threaded with a nut 55, and the other end of the screw 53 is rotatably connected to an eccentric handle 54. The radial clamping section 61 of the locking sleeve 6 is provided with a thickened part 611 corresponding to the opening of the clamping ring 51. The thickened part 611 abuts against the connection between the clamping ring 51 and the connecting ear 52.

Claims

1. A treadmill with adjustable handrail height, characterized in that, include: A frame, on which a running platform is provided; The riser assembly is symmetrically arranged on both sides of the front end of the frame. The riser assembly includes a main pipe fixed to the frame and a secondary pipe that can be telescopically inserted into the main pipe. The top of the secondary pipe extends to the upper side of the opening of the main pipe and is provided with a handrail. The control console is connected between the two secondary pipes; The height locking mechanism includes a locking sleeve located at the top opening of the main tube and a seat tube clamp covering the outside of the locking sleeve. The locking sleeve is made of flexible material and is sleeved on the outer wall of the secondary tube. When the seat tube clamp clamps the locking sleeve, the locking sleeve undergoes radial elastic deformation and clamps the outer wall of the secondary tube, thereby achieving mechanical locking of the lifting stroke of the secondary tube.

2. The treadmill with adjustable handrail height according to claim 1, characterized in that: The locking sleeve includes a radial clamping section and an axial extension section. A radially outwardly extending annular limiting flange is provided between the radial clamping section and the axial extension section. The bottom end of the annular limiting flange is supported on the open end face of the main tube. The seat tube clamp is provided outside the radial clamping section and supported on the top end of the annular limiting flange. The axial extension section extends into the main pipe, the outer wall of the axial extension section is fitted with the inner wall of the main pipe, and the inner wall of the axial extension section is fitted with the outer wall of the secondary pipe.

3. The treadmill with adjustable handrail height according to claim 1, characterized in that: The locking sleeve is provided with a number of axially extending gaps, which penetrate the inner and outer walls of the locking sleeve and the top of the locking sleeve, and divide the locking sleeve into a number of elastically deformable lobes.

4. The treadmill with adjustable handrail height according to claim 3, characterized in that: The aforementioned gaps are evenly spaced on the locking sleeve along the circumferential direction of the locking sleeve.

5. The treadmill with adjustable handrail height according to claim 3, characterized in that: The gap includes an expansion section and a straight section extending along the axial direction of the riser assembly. The straight section passes through a radial clamping section and a portion of the axial extension section, with one end of the straight section penetrating the top of the radial clamping section. The expansion section is located at the other end of the straight section and within the region of the axial extension section. The width of the expansion section is greater than the width of the straight section.

6. The treadmill with adjustable handrail height according to claim 2, characterized in that: At least one buckle is provided on the outer wall of the bottom of the axial extension section, and the main pipe is provided with a buckle hole for engaging with the buckle.

7. The treadmill with adjustable handrail height according to claim 6, characterized in that: The axial extension section has axially extending deformation seams on both sides of the buckle and extending through the bottom of the axial extension section. The deformation seams divide the area where the buckle is located into deformable pieces that can be elastically deformed independently. The thickness of the deformable pieces is less than the thickness of the axial extension section itself.

8. The treadmill with adjustable handrail height according to claim 5, characterized in that: The inner wall of the locking sleeve includes a ribbed region and a smooth region without ribs. The maximum thickness of the ribbed region is the same as the thickness of the smooth region. The ribbed region is located on the lower side of the smooth region, and the straight segment of the gap passes through the smooth region.

9. The treadmill with adjustable handrail height according to any one of claims 1 to 8, characterized in that: The seat clamp includes a clamping ring with an opening, the clamping ring being C-shaped, and a connecting lug integrally formed with the clamping ring at the opening of the clamping ring. A screw passes through the connecting lug, one end of the screw being threaded with a nut, and the other end of the screw being rotatably connected to an eccentric handle. The locking sleeve has a thickened portion corresponding to the opening of the clamping ring, and the thickened portion abuts against the connection between the clamping ring and the connecting lug.

10. The treadmill with adjustable handrail height according to claim 2, characterized in that: The bottom surface of the axial extension section is inclined.

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