Telescopic rod sliding mechanism and chair seat with footrest

Abstract

The utility model belongs to the technical field of office furniture, and particularly relates to a telescopic rod sliding mechanism and a chair seat with a footrest, the telescopic rod sliding mechanism comprises an elliptical telescopic rod, and the telescopic rod sliding mechanism also comprises an elliptical auxiliary sleeve provided with a plurality of arc-shaped propping plates which protrude inwards; at least part of the oval telescopic rod is inserted into the oval auxiliary sleeve and can move relative to the oval auxiliary sleeve under the action of external force, and the arc-shaped abutting plate makes tangent contact with the oval auxiliary sleeve. An oval auxiliary sleeve is arranged between a seat frame and an oval telescopic rod for separated connection, the oval auxiliary sleeve is detachably installed in a sleeve fixing base at the bottom of the seat frame, and the oval telescopic rod is only in contact with an arc-shaped abutting plate, protruding inwards, of the oval auxiliary sleeve. And the plurality of arc-shaped propping plates are arranged in a certain manner to jack up the elliptical telescopic rod in a suspended manner, so that the elliptical telescopic rod can smoothly move in a track with very small friction force, and the stability of the footrest device is kept.

Description

Technical Field

[0001] The utility model belongs to the technical field of office furniture, and particularly relates to a telescopic rod sliding mechanism and a chair seat with a footrest. Background Art

[0002] A chair is a piece of seating with a backrest and some also have armrests. With the development of society, chairs are designed with a more ergonomic structure according to the user's usage environment, which facilitates a better user experience. A footrest structure is added to the underside of the seat cushion so that the user's legs and feet can also be relaxed.

[0003] The swivel chair footrest mechanism and swivel chair disclosed in patent CN217510144U include a seat frame, two mutually parallel telescopic adjustment rods slidably connected to the bottom of the seat frame, a connecting seat connected to the front ends of the two telescopic adjustment rods, a transverse axis extending vertically through the connecting seat, and footrests fixedly connected at both ends of the transverse axis. A first concave-convex locking structure is provided on the side of the connecting seat near the footrest, and a second concave-convex locking structure is provided on the side of the footrest near the connecting seat. The footrest can rotate relative to the connecting seat, and the first concave-convex locking structure and the second concave-convex locking structure cooperate to allow the footrest to be flattened and locked relative to the connecting seat in the locking position and the storage position. The advantages of this application are that it not only achieves synchronous and unidirectional rotation adjustment of the footrests at both ends, but also ensures their stability and is more convenient for maintenance and replacement.

[0004] The above solution solves the problem of achieving synchronization between the swivel chair footrest and the footrest, and ensuring stability during rotational adjustment. Although a full-length adjustment rod track is provided at the lower end of the seat frame to guide and withstand pressure, the inner wall of the track contacts the telescopic adjustment rod excessively, resulting in significant friction between the two, which hinders the movement of the telescopic adjustment rod. Furthermore, there may be uneven friction between different parts, causing deflection of the telescopic adjustment rod during axial movement, further disrupting the fit between the track and the adjustment rod and reducing the stability of the adjustment rod within the track. Utility Model Content

[0005] The purpose of the utility model is to provide a telescopic rod sliding mechanism and a chair seat with a footrest that can solve the above technical problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A telescopic rod sliding mechanism includes an elliptical telescopic rod, and the telescopic rod sliding mechanism also includes an elliptical auxiliary sleeve having a plurality of inwardly protruding arc-shaped abutment plates. At least a portion of the elliptical telescopic rod is inserted into the elliptical auxiliary sleeve and can move relative to the elliptical auxiliary sleeve under the action of an external force, and the arc-shaped abutment plates are in tangential contact with the elliptical auxiliary sleeve.

[0008] In the telescopic rod sliding mechanism, at least some of the arcuate abutting plates are distributed in groups of two.

[0009] In the telescopic rod sliding mechanism, two arc-shaped abutting plate groups are provided on the elliptical auxiliary sleeve, and the two arc-shaped abutting plate groups are tangentially in contact with the elliptical telescopic rod in the long axis direction of the cross section of the elliptical telescopic rod.

[0010] In the telescopic rod sliding mechanism, an arc-shaped abutting plate is provided on the bottom side of the elliptical auxiliary sleeve, and the two arc-shaped abutting plate groups and the arc-shaped abutting plate on the bottom side are distributed in a triangular shape.

[0011] In the telescopic rod sliding mechanism, the axial length of the elliptical auxiliary sleeve is longer than the axial length of the arc-shaped abutting plate.

[0012] In the telescopic rod sliding mechanism, the elliptical auxiliary sleeve and the arc-shaped abutting plate are connected to form an integrated structure.

[0013] The utility model also provides a chair seat with a footrest, comprising a seat frame, a telescopic rod sliding mechanism is provided at the bottom of the seat frame, and a footrest is provided at the suspended end of the elliptical telescopic rod of the telescopic rod sliding mechanism.

[0014] In the chair seat with a footrest, a sleeve fixing seat is provided at the bottom of the seat frame, and an elliptical space for installing the elliptical auxiliary sleeve is formed between the sleeve fixing seat and the bottom of the seat frame. At least a portion of the elliptical auxiliary sleeve is fixed in the elliptical space, and an axial stop protrusion is provided in the axial direction of the elliptical auxiliary sleeve.

[0015] In the chair seat with footrest, there are 1-2 oval auxiliary sleeves.

[0016] In the chair seat with footrest, a footrest fixing seat is provided at the suspended end of the elliptical telescopic rod, there are two footrests, and a linkage shaft with both ends passing through the footrest fixing seat is passed through the footrest fixing seat, one footrest is sleeved on one end of the linkage shaft, and the other footrest is sleeved on the other end of the linkage shaft, and a fastening screw vertically connected to the linkage shaft is passed through each footrest.

[0017] The advantages of the utility model are:

[0018] An elliptical auxiliary sleeve is set between the seat frame and the elliptical telescopic rod for separation and connection. The elliptical auxiliary sleeve is detachably installed in the sleeve fixing seat at the bottom of the seat frame, and the elliptical telescopic rod only contacts the inwardly protruding arc-shaped top plate of the elliptical auxiliary sleeve. Multiple arc-shaped top plates are arranged in a certain structure to suspend the elliptical telescopic rod, so that the elliptical telescopic rod can move smoothly in a track with very low friction, thereby maintaining the stability of the footrest device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the telescopic rod sliding mechanism of the utility model.

[0020] Figure 2 This is a schematic diagram of the elliptical auxiliary sleeve of the utility model.

[0021] Figure 3 This is a schematic diagram of a chair seat with a footrest according to the present invention.

[0022] Figure 4 This is a schematic diagram of the seat frame of the present utility model.

[0023] Figure 5 This is a schematic diagram of the footrest mechanism of the present utility model.

[0024] Figure 6 This is a schematic diagram of a footrest according to the present invention.

[0025] In the figure, there are an elliptical telescopic rod 1, an elliptical auxiliary sleeve 2, an arc-shaped top plate 21, an axial stop protrusion 22, a seat frame 3, a sleeve fixing seat 31, a footrest 4, a footrest fixing seat 41, a linkage shaft 422, a fastening screw 43, a fixed locking block 44, and a movable locking block 45. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the utility model and the accompanying drawings to further describe the technical solution of the utility model, but the utility model is not limited to these embodiments.

[0027] Example 1

[0028] like Figure 1-Figure 2 As shown, the telescopic rod sliding mechanism includes an elliptical telescopic rod 1, and the telescopic rod sliding mechanism also includes an elliptical auxiliary sleeve 2 having a plurality of inwardly protruding arc-shaped abutment plates 21. At least a portion of the elliptical telescopic rod 1 is inserted into the elliptical auxiliary sleeve 2 and can move relative to the elliptical auxiliary sleeve 2 under the action of an external force, and the arc-shaped abutment plates 21 are in tangential contact with the elliptical auxiliary sleeve 2.

[0029] That is, an elliptical auxiliary sleeve 2 is provided between the seat frame 3 and the elliptical telescopic rod 1 for separate connection. The elliptical auxiliary sleeve 1 is detachably mounted in a sleeve fixing seat 31 at the bottom of the seat frame 3, and the elliptical telescopic rod 1 only contacts the inwardly protruding arc-shaped abutting plate 21 of the elliptical auxiliary sleeve 2. The multiple arc-shaped abutting plates 21 are arranged in a certain structure to suspend the elliptical telescopic rod 1 in the air, so that the elliptical telescopic rod 1 can move smoothly in a track with very low friction, thereby maintaining the stability of the footrest device.

[0030] In this embodiment, at least some of the arc-shaped abutting plates 21 are distributed in groups of two.

[0031] The arc-shaped supporting plates 21 in a group of two are gull-wing shaped, and use two opposite arc-shaped parts to simultaneously make tangential contact with the outer wall of the elliptical telescopic rod 1 to achieve the effect of stabilizing the spatial position of the elliptical telescopic rod 1. Usually, they are symmetrically arranged on both sides with another group of arc-shaped supporting plates 21 for use in conjunction with each other, and a single arc-shaped supporting plate 21 is used to provide additional support for the elliptical telescopic rod 1.

[0032] Preferably, two sets of arc-shaped abutting plates 21 are provided on the elliptical auxiliary sleeve 2 , and the two sets of arc-shaped abutting plates 21 are tangentially in contact with the elliptical telescopic rod 1 in the long axis direction of the cross section of the elliptical telescopic rod 1 .

[0033] The two groups of arc-shaped abutting plates 21 are respectively arranged at the two ends of the long axis of the cross section of the elliptical telescopic rod 1. The force directions of the two arc-shaped surfaces in the same group intersect on the long axis, ensuring that the elliptical telescopic rod 1 is in a stable state.

[0034] In this embodiment, an arc-shaped abutting plate 21 is provided on the bottom side of the elliptical auxiliary sleeve 2 , and the two sets of arc-shaped abutting plates 21 and the arc-shaped abutting plate 21 on the bottom side are distributed in a triangular manner.

[0035] The arc-shaped supporting plate 21 on the bottom side is mainly used to share the deadweight of the elliptical telescopic rod 1, reduce the force burden of the lower arc plate in the arc-shaped supporting plate 21 group, and make it more balanced with the force of the upper arc plate, thereby maintaining the position of the elliptical telescopic rod 1 in the elliptical auxiliary sleeve 2.

[0036] The two arc-shaped abutting plates 21 and the arc-shaped abutting plate 21 on the bottom side form an inverted triangle, so that the support of the arc-shaped abutting plates 21 on the elliptical telescopic rod 1 is more stable.

[0037] In this embodiment, the axial length of the elliptical auxiliary sleeve 2 is longer than the axial length of the arc-shaped abutting plate 21 .

[0038] The end of the elliptical auxiliary sleeve 2 is provided with a more secure axial stop protrusion 22. The side wall of the elliptical auxiliary sleeve 2 is an outwardly convex arc surface, while the arc-shaped top plate 21 is just the opposite and is inwardly convex. In order to facilitate the processing of the opposite arc surface, a gap is left between the axial end of the shorter arc-shaped top plate 21 and the axial stop protrusion 22.

[0039] In this embodiment, the elliptical auxiliary sleeve 2 and the arc-shaped abutting plate 21 are connected into an integrated structure.

[0040] A number of arc-shaped abutment plates 21, inversely shaped from the original contour, are spaced apart on the sidewalls of a regular elliptical cylinder, with the arcuate surfaces protruding from the inner wall. Stronger axial stop projections 22 are added to the axial ends of the cylinder to enhance its structural strength. The arc-shaped abutment plates 21 of the elliptical auxiliary sleeve 2 not only provide stable inward support for the elliptical telescopic rod 1 but also require their contact ends to slide and rub against the elliptical telescopic rod 1. Therefore, they are typically made of a highly wear-resistant and rigid material such as polyoxymethylene.

[0041] Example 2

[0042] like Figure 3-Figure 6 As shown, the telescopic rod sliding mechanism in Example 1 is used in a chair seat with a footrest, the telescopic rod sliding mechanism is provided at the bottom of the seat frame 3, and a footrest 4 is provided at the suspended end of the elliptical telescopic rod 1 of the telescopic rod sliding mechanism.

[0043] In this embodiment, a sleeve fixing seat 31 is provided at the bottom of the seat frame 3. An elliptical space for installing the elliptical auxiliary sleeve 2 is formed between the sleeve fixing seat 31 and the bottom of the seat frame 3. At least a portion of the elliptical auxiliary sleeve 2 is fixed in the elliptical space, and an axial stop protrusion 22 is provided in the axial direction of the elliptical auxiliary sleeve 2. The axial stop protrusion 22 abuts against the sleeve fixing seat 31.

[0044] Preferably, there are 1-2 elliptical auxiliary sleeves 2.

[0045] The axial stop protrusions 22 can be provided at both ends of an elliptical auxiliary sleeve 2, with the axial stop protrusions 22 at both ends being engaged in the contoured grooves in the sleeve fixing seat 31. Alternatively, the axial stop protrusion 22 can be provided at only one end of an elliptical auxiliary sleeve 2, and two such elliptical auxiliary sleeves 2 can be used to symmetrically arrange them in the sleeve fixing seat 31.

[0046] In this embodiment, a footrest fixing seat 41 is provided at the suspended end of the elliptical telescopic rod 1, there are two footrests 4, and a linkage shaft 42 with both ends passing through the footrest fixing seat 41 is passed through the footrest fixing seat 41, one footrest 4 is sleeved on one end of the linkage shaft 42, and the other footrest 4 is sleeved on the other end of the linkage shaft 42, and a fastening screw 43 perpendicularly connected to the linkage shaft 42 is passed through each footrest 4, so that the two footrests 4 swing synchronously with the linkage shaft 42.

[0047] Cylinders concentric with the linkage shaft 42 are provided on both sides of the footrest fixing seat 41, and fixed locking blocks 44 in the shape of a fan with the linkage shaft 42 as the center are provided at the ends of the cylinders. A groove similar to the cylinder is also provided on the side opposite to the footrest 4 and the footrest fixing seat 41, and a movable locking block 45 in the shape of a fan with the linkage shaft 42 as the center but at a different angle is provided at the bottom of the groove.

[0048] When the footrest 4 needs to be used, the footrest fixing seat 41 is first pulled forward and parallel, and then the footrest 4 is flipped forward from top to bottom, and the movable locking block 45 is rotated to a certain angle and abuts against a plane of the fixed locking block 44, so that the cushion of the footrest 4 faces upward. When the footrest 4 needs to be folded, it is rotated in the opposite direction, so that the movable locking block 45 is rotated and abuts against another plane of the fixed locking block 44, so that the cushion of the footrest 4 faces downward.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A telescopic rod sliding mechanism, comprising an elliptical telescopic rod (1), characterized in that: The telescopic rod sliding mechanism further comprises an elliptical auxiliary sleeve (2) having a plurality of inwardly protruding arc-shaped abutting plates (21), at least a portion of the elliptical telescopic rod (1) is inserted into the elliptical auxiliary sleeve (2) and can move relative to the elliptical auxiliary sleeve (2) under the action of an external force, and the arc-shaped abutting plates (21) are in tangential contact with the elliptical auxiliary sleeve (2).

2. The telescopic rod sliding mechanism according to claim 1, characterized in that: At least some of the arc-shaped abutting plates (21) are distributed in groups of two.

3. The telescopic rod sliding mechanism according to claim 2, characterized in that: Two groups of arc-shaped abutting plates (21) are provided on the elliptical auxiliary sleeve (2), and the two groups of arc-shaped abutting plates (21) are respectively tangentially in contact with the elliptical telescopic rod (1) in the direction of the long axis of the cross section of the elliptical telescopic rod (1).

4. The telescopic rod sliding mechanism according to claim 3, characterized in that: An arc-shaped abutting plate (21) is provided on the bottom side of the elliptical auxiliary sleeve (2), and the two arc-shaped abutting plates (21) groups and the arc-shaped abutting plate (21) on the bottom side are distributed in a triangular manner.

5. The telescopic rod sliding mechanism according to claim 1, characterized in that: The axial length of the elliptical auxiliary sleeve (2) is longer than the axial length of the arc-shaped abutting plate (21).

6. The telescopic rod sliding mechanism according to claim 1, characterized in that: The elliptical auxiliary sleeve (2) and the arc-shaped abutting plate (21) are connected to form an integrated structure.

7. A chair seat with a footrest, comprising a seat frame (3), characterized in that: A telescopic rod sliding mechanism according to any one of claims 1 to 6 is provided at the bottom of the seat frame (3), and a footrest (4) is provided at the suspended end of the elliptical telescopic rod (1) of the telescopic rod sliding mechanism.

8. The chair seat with a footrest according to claim 7, characterized in that: A sleeve fixing seat (31) is provided at the bottom of the seat frame (3), and an elliptical space for installing the elliptical auxiliary sleeve (2) is formed between the sleeve fixing seat (31) and the bottom of the seat frame (3). At least a portion of the elliptical auxiliary sleeve (2) is fixed in the elliptical space, and an axial stop protrusion (22) is provided in the axial direction of the elliptical auxiliary sleeve (2).

9. The chair seat with a footrest according to claim 8, characterized in that: There are 1-2 oval auxiliary sleeves (2).

10. The chair seat with a footrest according to claim 7, characterized in that: A footrest fixing seat (41) is provided at the suspended end of the elliptical telescopic rod (1), there are two footrests (4), and a linkage shaft (42) is provided on the footrest fixing seat (41) with both ends passing through the footrest fixing seat (41), one footrest (4) is sleeved on one end of the linkage shaft (42), and the other footrest (4) is sleeved on the other end of the linkage shaft (42), and a fastening screw (43) is provided on each footrest (4) and is vertically connected to the linkage shaft (42).

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