Height adjustment device for a folding chair and folding chair

Abstract

This utility model relates to a height adjustment device for a folding chair, including a chair leg. A slide rod, one end of which extends out of the bottom of the chair leg, is slidably connected within the chair leg. At least one radially compressible elastic locking pin is provided on the slide rod along its axial direction. A limiting hole is provided on the outer wall of the chair leg for the elastic locking pin to extend out. A button seat is provided on the chair leg, and a sliding cavity is provided within the button seat. A button is slidably connected within the sliding cavity, and the inner end of the button abuts against the elastic locking pin extending out of the limiting hole. This utility model not only offers convenient adjustment and reliable structural design but also has a wide range of applications.

Description

Technical Field

[0001] This utility model relates to the field of outdoor products, and in particular to a height adjustment device for a folding chair and a folding chair. Background Technology

[0002] Folding chairs are widely used in daily life and outdoor leisure activities due to their portability and ease of storage.

[0003] However, existing height adjustment devices for folding chairs have many shortcomings: some adjustment mechanisms are achieved through bolts and nuts, which are cumbersome to operate, require tools, and have low adjustment efficiency; some adopt a snap-on design, but they are prone to loosening or falling off when used frequently or subjected to external impact, resulting in height adjustment failure and affecting safety and comfort. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a height adjustment device for a folding chair and a folding chair, which is not only convenient to adjust and operate and has a reliable structural design, but also has a wide range of applications.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A height adjustment device for a folding chair includes a chair leg, a slide rod slidably connected inside the chair leg with one end extending out of the bottom of the chair leg, at least one radially compressible elastic locking pin provided on the slide rod, a limiting hole provided on the outer wall of the chair leg for the elastic locking pin to extend out, a button seat provided on the chair leg, a sliding cavity provided in the button seat, a button slidably connected in the sliding cavity, and the inner end of the button abutting against the elastic locking pin extending out of the limiting hole.

[0007] Furthermore, when there are multiple elastic locking pins, the multiple elastic locking pins are arranged at intervals along the axial direction of the slide bar.

[0008] Furthermore, it also includes a U-shaped elastic strip. The slide rod is an axially penetrating hollow cavity. The side wall of the hollow cavity is provided with a through hole for the elastic locking pin to extend out. The two sides of the U-shaped elastic strip are elastically pressed against the opposite inner walls of the hollow cavity. The elastic locking pin is fixedly connected to one side of the U-shaped elastic strip and extends out of the through hole.

[0009] Furthermore, the number of U-shaped elastic strips, through holes, and elastic locking pins is the same, and each elastic locking pin is fixedly connected to the corresponding U-shaped elastic strip and passes through the corresponding through hole.

[0010] Furthermore, the button base is provided with a through groove for the chair leg to pass through. The through groove has an opening along its axial direction. Clamping parts extend outward from both ends of the opening of the through groove. Fasteners are transversely inserted on the two clamping parts so that the button base is clamped to the chair leg.

[0011] Furthermore, the button holder is a flexible plastic structure.

[0012] Furthermore, an anti-slip sleeve is fitted onto the lower end of the slide rod.

[0013] Furthermore, the protruding end of the elastic locking pin has an arc-shaped contact surface.

[0014] A folding chair includes a seat and a foldable folding chair frame. The folding chair frame includes left and right chair frames arranged symmetrically. The left chair frame includes a left front chair leg and a left rear chair leg, and the right chair frame includes a right front chair leg and a right rear chair leg. Each chair leg is provided with the aforementioned height adjustment device.

[0015] Furthermore, a first crossbar is fixedly connected between the button seats on the left and right front chair legs, and a second crossbar is fixedly connected between the button seats on the left and right rear chair legs. A connecting seat is fixedly fitted at the bottom of each chair leg. The connecting seats on the left and right front chair legs are respectively connected to the first crossbar via connecting rods, and the connecting seats on the left and right rear chair legs are respectively connected to the second crossbar via connecting rods.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] First, the adjustment is convenient: by pressing the button and sliding the slide bar along the axial direction of the chair leg, the elastic locking pin will automatically engage with the limiting hole under the action of radial elastic force, so that the height can be adjusted and fixed without the need for additional tools. The operation process is simple and efficient.

[0018] Secondly, the structural design is reliable: the elastic locking pin extends into the through hole on the slide rod, and the U-shaped elastic strip fixedly connected to it presses against the opposite inner wall of the hollow cavity on both sides, effectively preventing the elastic locking pin from loosening and falling off, and significantly improving the reliability of the device.

[0019] Third, it has a wide range of applications: it is compatible with a variety of folding chairs, and by adjusting the size, it can meet the diverse needs of different scenarios and users. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the unfolded folding chair according to this utility model.

[0021] Figure 2 This is a cross-sectional schematic diagram of the height adjustment device of this utility model.

[0022] Figure 3 yes Figure 2A magnified view of a portion of the image.

[0023] Figure 4 This is a three-dimensional schematic diagram of the button base in this utility model.

[0024] Figure 5 This is a three-dimensional schematic diagram of the elastic locking pin and the U-shaped elastic strip in this utility model.

[0025] Figure 6 This is a three-dimensional schematic diagram of the storage of a folding chair according to this utility model. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings.

[0027] like Figures 1 to 6 As shown in the figure, the height adjustment device for a folding chair according to the present invention includes a chair leg 1, a slide rod 2 extending out of the bottom end of the chair leg 1 and slidably connected inside the chair leg 1, the slide rod 2 being provided with at least one radially compressible elastic locking pin 21, a limiting hole 11 for the elastic locking pin 21 to extend out of the outer wall of the chair leg 1, a button seat 12 being provided on the chair leg 1, a sliding cavity 121 being provided inside the button seat 12, a button 122 being slidably connected inside the sliding cavity 121, the inner end of the button 122 abutting against the elastic locking pin 21 extending out of the limiting hole 11.

[0028] As described above, when there are multiple elastic locking pins 21, the multiple elastic locking pins 21 are arranged at intervals along the axial direction of the slide bar 2, wherein there are two or more of them.

[0029] If only one elastic locking pin 21 is installed on the slide bar 2, the height adjustment and storage operation method is as follows:

[0030] Slide the slide bar 2 along the axis of the chair leg 1 to the target position. The elastic locking pin 21 will automatically engage with the corresponding limiting hole 11 under the action of radial elastic force, thus completing the height adjustment and fixation.

[0031] Press button 122 to radially compress the elastic locking pin 21 and disengage it from the limiting hole 11, thereby releasing the lock between the slide rod 2 and the chair leg 1; push the slide rod 2 back into the chair leg 1 to achieve the storage of the slide rod 2.

[0032] If multiple elastic locking pins 21 are provided on the slide bar 2, the height adjustment and storage operation method is as follows:

[0033] Press button 122 so that its inner end presses against the elastic locking pin 21 currently inserted into the limiting hole 11, causing the elastic locking pin 21 to retract into the limiting hole 11; slide the slide bar 2 along the axis of the chair leg 1. At this time, when the other elastic locking pins 21 on the slide bar pass through the limiting hole 11, they are temporarily retracted by the pressure of the inner end of button 122 until the elastic locking pin 21 at the target position is aligned with the limiting hole 11. Then release button 122, and the elastic locking pin 21 at the target position pops out and is inserted into the limiting hole 11 under the action of radial elastic force, thus completing the height adjustment and fixation.

[0034] Press button 122 continuously to keep the current elastic locking pin 21 out of the limiting hole 11, push the slide bar 2 to retract into the chair leg 1. During the process, all elastic locking pins 21 are squeezed as they pass through the limiting hole 11 in sequence until the slide bar 2 is fully retracted. Release button 122, and the end locking pin 21 will be inserted into the corresponding limiting hole 11, thus realizing the retraction of the slide bar 2.

[0035] As described above, it also includes a U-shaped elastic strip 3, and the slide rod 2 is an axially penetrating hollow cavity. The side wall of the hollow cavity is provided with a through hole 22 for the elastic locking pin 21 to extend out. The two sides of the U-shaped elastic strip 3 elastically press against the opposite inner wall of the hollow cavity, and the elastic locking pin 21 is fixedly connected to one side of the U-shaped elastic strip 3 and extends out of the through hole 22.

[0036] As described above, the number of U-shaped elastic strips 3, through holes 22 and elastic locking pins 21 are the same, and each elastic locking pin 21 is fixedly connected to the corresponding U-shaped elastic strip 3 and passes through the corresponding through hole 22.

[0037] As described above, the button base 12 is provided with a through groove 123 for the chair leg 1 to pass through. The through groove 123 has an opening 124 along its axial direction. Clamping portions 125 extend outward from both ends of the opening 124 of the through groove 123. Fasteners 126 are transversely inserted on the two clamping portions 125 so that the button base 12 is clamped to the chair leg 1. The fasteners 126 include screws (not shown in the figure) or rivets used in this utility model.

[0038] As described above, the button base 12 is a flexible plastic structure.

[0039] As described above, the lower end of the slide bar 2 is fitted with an anti-slip sleeve 23.

[0040] As described above, the protruding end of the elastic locking pin 21 has an arc-shaped contact surface.

[0041] This utility model also proposes a folding chair, such as Figures 1 to 6As shown, the chair includes a seat 4 and a foldable chair frame 5. The foldable chair frame 5 includes left and right chair frames 51 and 52 arranged symmetrically. The left chair frame 51 includes a left front chair leg 53 and a left rear chair leg 54, and the right chair frame 52 includes a right front chair leg 55 and a right rear chair leg 56. Each chair leg is equipped with the aforementioned height adjustment device.

[0042] As described above, a first crossbar 57 is fixedly connected between the button seats 12 on the left and right front chair legs 53 and 55, and a second crossbar 58 is fixedly connected between the button seats 12 on the left and right rear chair legs 54 and 56. A connecting seat 59 is fixedly fitted at the bottom of each chair leg. The connecting seats 59 on the left and right front chair legs 53 and 55 are respectively connected to the first crossbar 57 through the connecting rod 6, and the connecting seats 59 on the left and right rear chair legs 54 and 56 are respectively connected to the second crossbar 58 through the connecting rod 6.

[0043] The above description is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Any simple equivalent changes and modifications made in accordance with the scope of the present utility model patent application and the description of the utility model shall still fall within the scope of the present utility model patent.

Claims

1. A height adjustment device for a folding chair comprising a chair leg, characterized in that, The chair leg is slidably connected to a slide rod with one end extending from the bottom of the chair leg. The slide rod is provided with at least one radially compressible elastic locking pin. The outer wall of the chair leg is provided with a limiting hole for the elastic locking pin to extend out. The chair leg is provided with a button seat. The button seat is provided with a sliding cavity. A button is slidably connected in the sliding cavity. The inner end of the button abuts against the elastic locking pin extending out of the limiting hole. The button seat is provided with a through groove for the chair leg to pass through. The through groove has an opening along its axial direction. The two ends of the opening of the through groove extend outward with clamping parts. Fasteners are transversely inserted on the two clamping parts to clamp the button seat to the chair leg.

2. The height adjustment device of a folding chair according to claim 1, wherein When there are multiple elastic locking pins, the multiple elastic locking pins are arranged at intervals along the axial direction of the slide rod.

3. The height adjustment device for a folding chair according to claim 1 or 2, characterized in that, It also includes a U-shaped elastic strip. The slide rod is an axially penetrating hollow cavity. The side wall of the hollow cavity is provided with a through hole for the elastic locking pin to extend out. The two sides of the U-shaped elastic strip are elastically pressed against the opposite inner walls of the hollow cavity. The elastic locking pin is fixedly connected to one side of the U-shaped elastic strip and extends out of the through hole.

4. The height adjustment device for a folding chair according to claim 3, characterized in that, The number of U-shaped elastic strips, through holes, and elastic locking pins is the same, and each elastic locking pin is fixedly connected to the corresponding U-shaped elastic strip and passes through the corresponding through hole.

5. The height adjustment device for a folding chair according to claim 1, characterized in that, The button holder is made of elastic plastic.

6. The height adjustment device of a folding chair according to claim 1, wherein The lower end of the slide bar is fitted with an anti-slip sleeve.

7. The height adjustment device of a folding chair according to claim 1, wherein The protruding end of the elastic locking pin has an arc-shaped contact surface.

8. A folding chair characterized by: The chair includes a seat and a foldable chair frame. The foldable chair frame includes left and right chair frames arranged symmetrically. The left chair frame includes a left front chair leg and a left rear chair leg, and the right chair frame includes a right front chair leg and a right rear chair leg. Each chair leg is provided with a height adjustment device for a foldable chair as described in any one of claims 1-7.

9. A folding chair according to claim 8, wherein, A first crossbar is fixedly connected between the button seats on the left and right front chair legs, and a second crossbar is fixedly connected between the button seats on the left and right rear chair legs. A connecting seat is fixedly fitted at the bottom of each chair leg. The connecting seats on the left and right front chair legs are respectively connected to the first crossbar via connecting rods, and the connecting seats on the left and right rear chair legs are respectively connected to the second crossbar via connecting rods.

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