CN113749447A

CN113749447A - Adjustable chair seat

Info

Publication number: CN113749447A
Application number: CN202111238221.9A
Authority: CN
Inventors: 于飞龙; 李星星
Original assignee: Anji Xuanlong Furniture Co ltd
Current assignee: Anji Xuanlong Furniture Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2021-12-07
Anticipated expiration: 2041-10-25
Also published as: CN113749447B

Abstract

The invention discloses an adjustable chair seat, which comprises a chair seat underframe and a first cushion fixed on the chair seat underframe; leg supports and a second seat cushion fixed on the leg supports are arranged beside the left side and the right side of the front part of the seat bottom frame; the chair also comprises a sliding rail frame arranged on the bottom frame of the chair seat, and the leg support can move left and right on the sliding rail frame; the chair also comprises an adjusting mechanism which can drive the two leg supports to synchronously move in opposite directions and is used for adjusting the opening degree of the front part of the chair seat. The invention has the beneficial effect of improving the comfort of the legs and the buttocks of the user.

Description

Adjustable chair seat

Technical Field

The present invention relates to a chair seat, in particular an adjustable chair seat.

Background

In the prior art, the seat of most chairs such as leisure chairs and electric competition chairs is of a square structure, the width of the seat determines the width of the left and right opening of the legs of a user, for the seat with a small width, the opening width of the legs of the user is limited, and the comfort of the legs is not good; for the seat with larger width, although the opening range of the two legs is not limited, the width of the rear part of the seat is larger, and the comfort of the buttocks is not good.

For example, patent application publication No. CN112535373A discloses an office seat with adjustable width, which relates to a seat, wherein the lower end of a backrest is fixedly connected with the rear end of a seat plate, support legs are arranged on the lower part of the seat plate, the rear ends of two armrests are hinged to the lower parts of the two sides of the backrest, the front lower parts of the two armrests are respectively fixedly connected with the upper ends of two additional support legs, the upper parts of the two additional support legs, which are close to the upper parts, are respectively connected with the front ends of support rods on the two sides of the seat plate, the rear ends of the two support rods are respectively hinged to the two sides of the lower surface of the seat plate, the outer ends of two pull rods are respectively connected to the opposite surfaces of the two support rods, which are close to the front parts, the interiors of the two pull rods are respectively located in gaps formed between the lower recesses on the upper ends of the support legs and the lower surface of the seat plate, and the connecting pieces are connected with the lower ends of the widened plates in a vertical state. Although the technical solution of this patent application supports the seat plate to be increased in width, there are several technical problems as follows: firstly, the wrapping feeling of the seat plate on the buttocks is sacrificed due to the widening of the seat plate, namely, a user faces the dilemma of one of comfort levels of legs and buttocks; secondly, the chair seat plate only has two widths which can be selected, and a user can not select the width by self-definition according to the use requirement; finally, widening the seat plate also increases the separation distance between the left armrest and the right armrest, so that the chair is more suitable for users with different fat degrees and is not suitable for users who adjust according to the opening amplitude of the two legs.

Disclosure of Invention

The invention aims to provide an adjustable chair seat, which improves the comfort of legs and buttocks of a user.

The invention is realized by the following technical scheme.

An adjustable chair seat comprises a chair seat underframe and a first cushion fixed on the chair seat underframe; leg supports and a second seat cushion fixed on the leg supports are arranged beside the left side and the right side of the front part of the seat bottom frame; the chair also comprises a sliding rail frame arranged on the bottom frame of the chair seat, and the leg support can move left and right on the sliding rail frame; the chair also comprises an adjusting mechanism which can drive the two leg supports to synchronously move in opposite directions and is used for adjusting the opening degree of the front part of the chair seat.

As a further improvement of the invention, notches are formed on the left side and the right side of the front part of the seat bottom frame; the leg support is embedded in the notch when the front part of the chair seat is unfolded to the minimum.

As a further improvement of the invention, the chair seat underframe comprises a main frame body and side wing frame bodies respectively connected with the left side and the right side of the rear part of the main frame body; the side frames of the front part of the main frame body and the front frames of the side wing frame bodies form a gap of the bottom frame of the chair seat.

As a further improvement of the invention, the sliding rail frame comprises at least one sliding rod which is arranged on the seat bottom frame and extends left and right, and a sliding part which is sleeved on the sliding rod in a sliding manner; the sliding piece is fixedly connected with the leg support.

As a further improvement of the invention, the adjusting mechanism comprises a rotating shaft which is arranged on the chair seat underframe and extends left and right, and two adjusting pieces which are in threaded sleeve joint on the rotating shaft in opposite matching directions; and the two adjusting pieces are respectively and fixedly connected with the corresponding leg supports.

As a further improvement of the invention, the sliding part and the adjusting part are fixed inside the leg support, and the sliding rod and the rotating shaft penetrate into the leg support; one end of the rotating shaft penetrates through the leg support and is provided with a rotating structure.

As a further improvement of the invention, the seat cushion further comprises a covering layer which covers the first cushion and the two second cushions.

As a further improvement of the invention, the coating layer comprises a weak elastic part and a strong elastic part which are spliced together; the strong elastic part at least covers a gap generated between the bottom frame of the seat and the leg support under the unfolding degree of the front part of the seat.

As a further improvement of the invention, the strong elastic part extends along the length direction of the gap and extends to the edge of the coating layer.

As a further improvement of the invention, the left side edge and the right side edge of the rear part of the seat bottom frame are provided with supporting structures which extend forwards and backwards and are convex upwards.

The invention has the beneficial effects that:

(1) according to the invention, the two leg supports are driven by the adjusting mechanism to synchronously move in opposite directions, and the opening degree of the front part of the chair seat can be adjusted, so that the chair seat is suitable for a sitting posture that two legs of a user are opened left and right, and the comfort level is improved;

(2) according to the invention, the weak elastic part and the strong elastic part of the coating layer are arranged, so that a gap formed between the chair seat bottom frame and the leg support does not cause a foreign feeling to the legs of a user, and on the contrary, under the condition that the width of the gap is increased, the tension degree of the strong elastic part is improved, and a better supporting effect can be provided for the legs;

(3) the hip opening degree of the user is not sacrificed by adjusting the seat front part opening degree, and on the contrary, when the seat front part opening degree is increased, the hip is wrapped by the seat rear part and extends to the root of the thigh of the user, so that the user feels more comfortable.

Drawings

The preferred embodiments of the present invention will hereinafter be described in detail to facilitate understanding of the objects and advantages of the invention, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic top view of a cladding layer;

figure 2 is a top schematic view of a first seat cushion and a second seat cushion;

FIG. 3 is a top view of the seat bottom frame and leg rest;

FIG. 4 is a schematic top view of the sliding rail and adjustment mechanism;

FIG. 5 is a top view of the rear seat with the front portion of the seat expanded.

Detailed Description

The invention is explained in more detail below with reference to the drawings and exemplary embodiments.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like as referred to or as may be referred to in this specification are defined with respect to the configuration shown in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a particular component and are relative terms, and thus may be changed accordingly depending on the position and the state of use of the particular component. Therefore, these and other directional terms should not be construed as limiting terms.

Referring to fig. 1-4, an adjustable seat comprises a seat base frame 1, a first seat cushion 3, two leg rests 2, two second seat cushions 4, a slide rail, and an adjustment mechanism. The first seat cushion 3 and the seat base 1 are matched in shape and the first seat cushion 3 is fixed to the seat base 1, preferably using an adhesive. The second seat cushion 4 and the leg rest 2 are matched in shape and the second seat cushion 4 is fixed to the leg rest 2, also preferably using an adhesive. The two leg supports 2 are respectively positioned beside the left side and the right side of the front part of the seat bottom frame 1 and are in a position relation of left-right mirror symmetry. The sliding rail frame is arranged on the chair seat bottom frame 1, and the two leg supports 2 are assembled on the sliding rail frame in a sliding mode and can move in the left-right direction. The adjusting mechanism is used for driving the two leg supports 2 to synchronously move in opposite directions, so that the unfolding degree of the front part of the chair seat can be changed and adjusted.

In a chair generally used, the chair has a substantially square configuration in a plan view, and when a user sits on the seat, both legs are slightly spread in the right and left directions if the legs are extended forward, which is likely to cause fatigue. For users with thicker legs, the left-right opening amplitude of the two legs depends on the width of the chair seat, if the chair seat is narrower, the outer sides of the legs are easy to hang out of the two sides of the chair seat, so that the legs cannot be well supported, and the comfort is poor; however, if the chair is wide, the area of the rear portion of the seat for supporting the buttocks becomes large, so that the wrapping property of the seat cushion for the buttocks is reduced, and the buttocks are easily fatigued by ache and the like after a long time sitting. In this application, hold in the palm 2 through two legs of adjustment mechanism synchronous reverse movement to carry out self-defined regulation to the anterior exhibition aperture of seat support, be applicable to the user of the different position of sitting of user, and different sizes. In addition, the seat support presents an isosceles trapezoid structure that can change two waist degrees under overlooking the visual angle, promptly can adjust when changing the anterior opening size of seat support, can not change the width at seat support rear portion to can not weaken the comfort level of user's buttock.

The left and right sides of the front part of the seat bottom frame 1 are provided with notches, the shapes of the leg supports 2 and the notches are matched, and the leg supports 2 are embedded in the notches when the front part of the seat is unfolded to the minimum, so that the area of the leg supports 2 can be increased, and the support for the legs of a user is more stable and reliable. In addition, when the user adjusts the two leg supports 2 to be attached to the two sides of the seat bottom frame 1 by using the adjusting mechanism, the seat is in a complete square structure in a top view, and is basically the same as a commonly used chair, namely, the adjusting function of the seat is hidden, so that the high-grade feeling of the chair can be improved.

In a specific mechanism of the seat bottom frame 1, the seat bottom frame 1 includes a main frame 11 and side frame 12 connected to the left and right sides of the rear portion of the main frame 11, and the side frame 111 of the front portion of the main frame 11 and the front frame 121 of the side frame 12 define the edge of the notch of the seat bottom frame 1. The main frame 11 and the side frame 12 are made of steel pipes, and the bent portions are fixedly connected by means of thermal welding, wherein a plurality of reinforcing beams 112 spaced back and forth are fixedly connected between the two side frames 111 of the main frame 11 to reinforce the structural strength of the main frame 11, and the reinforcing beams 112 are also fixedly connected to a tray of a chair.

The left side limit at seat support chassis 1 rear portion, promptly be equipped with front and back extension and bellied bearing structure 122 that makes progress on the side frame of flank framework 12, bearing structure 122 specifically presents for having the stripe structure of certain height, can make the left and right sides at first seatpad 3 rear portion uplift upwards to improve the parcel sense to user's buttock.

The sliding rail frame comprises at least one sliding rod 51 which is arranged on the seat bottom frame 1 and extends left and right, and a sliding piece 52 which is sleeved on the sliding rod 51 in a sliding manner, wherein the sliding piece 52 is fixedly connected with the leg support 2. The two leg rests 2 may be provided with the slide bars 51 individually, or may share the slide bars 51. In this embodiment, the sliding rods 51 are directly fixed to the two side frames 111 of the main frame 11 by means of thermal welding, and the sliding rods 51 are provided in two, one of the sliding rods 51 is close to the front frame of the main frame 11, the other sliding rod is close to the front frame of the side frame 12, the limiting rods 53 are fixedly connected between the ends of the two sliding rods 51 on the same side, when the leg rest 2 moves to the farthest distance to the outside, the limiting rods 53 abut against the sliding pieces 52 to prevent the sliding pieces 52 from moving further, and a plurality of reinforcing rods 54 spaced left and right are fixedly connected between the two sliding rods 51 to support the sliding rods 51 for improving stability. The sliding member 52 is a cylindrical structure, and before the sliding member 52 is sleeved, lubricating oil can be properly coated on the inner wall of the sliding member to reduce the friction resistance when the leg rest 2 moves.

The adjustment mechanism is including setting up at seat support chassis 1 and the axis of rotation 61 that extends about, two with opposite cooperation direction screw thread cup joint the adjusting part 62 on axis of rotation 61, two adjusting part 62 respectively with the leg that corresponds hold in the palm 2 fixed connection, when the user adjusts and controls axis of rotation 61 and rotate, two adjusting part 62 along the axial antiport of axis of rotation 61 to drive two synchronous antiport 2. In this embodiment, the rotating shaft 61 is located between the two sliding rods 51, and a bearing 63 is sleeved on the middle of the rotating shaft 61, so that the rotating shaft 61 can rotate around its central axis. The top end and the bottom end of the bearing 63 are fixedly connected with the reinforcing rod 54 and the reinforcing beam 112 respectively, and the fixed connection can be realized by means of thermal welding. The adjuster 62 is similarly configured as a cylindrical mechanism.

The leg rest 2 is a square hollow structure, the sliding member 52 and the adjusting member 62 are fixed inside the leg rest 2, and correspondingly, the sliding rod 51 and the rotating shaft 61 also penetrate into the leg rest 2. The sliding member 52 and the adjusting member 62 can be fixed to the inside of the leg rest 2 by means of heat welding. In addition, one end of the rotating shaft 61 penetrates through the leg rest 2, and the end is provided with a rotating structure 64, so that a rotary cover, a rotary handle and the like can be adopted, and the rotation is convenient for a user to rotate.

When the user adjusts through adjustment mechanism, along with the increase of the anterior opening degree of seat support, the width of gap K that forms between seat support chassis 1 and the leg support 2 also can increase, when the width of gap K is not too big yet, first seatpad 3 and second seatpad 4 can be extrudeed to gap K department by the shank, make gap K by first seatpad 3, second seatpad 4 fills, consequently, the shank does not have obvious different appearance to feel, but when the width of gap K is enough big can't be by first seatpad 3, when second seatpad 4 fills, the shank just has obvious different appearance to feel, user's trousers are also blocked into gap K easily. Therefore, the seat of this application still includes cladding 7, cladding 7 wraps up first seatpad 3 and two second seatpads 4 to cover the gap K that produces between seat support chassis 1 and the leg support 2, make user's shank can not produce the strange sensation.

Although the coating 7 can cover the gap K between the seat bottom frame 1 and the leg support 2, after long-time use, especially after the leg support 2 is moved and adjusted for too many times, the tension of the coating 7 can be damaged, the deformation condition occurs, especially, the coating 7 can become loose corresponding to the part covering the gap K, and even the bulge condition occurs, so that the service life of the coating 7 is shortened, and discomfort can be easily caused by the direct contact between the coating 7 and the legs of a user. Based on the technical problem, the coating layer 7 comprises a weak elastic part 72 and a strong elastic part 71 which are spliced with each other, and the strong elastic part 71 at least covers a gap K generated between the seat bottom frame 1 and the leg rest 2 and is a gap K generated by adjusting the unfolding degree of the front part of the seat to an arbitrary state. On one hand, the unfolding degree of the front part of the chair seat is gradually increased through adjustment, and when the width of the gap K is gradually increased, the strong elastic part 71 is stretched, so that the stretching degree of the weak elastic part 72 is avoided or reduced, the function of protecting the weak elastic part 72 is achieved, and deformation is avoided; on the other hand, as the width of the gap K increases, the generated width of the strong elastic portion 71 increases, and further the tensioning degree of the strong elastic portion 71 increases, so that the supporting force for the leg of the user increases, and the gap K is filled up with the blank supporting area.

In this embodiment, the strong elastic portion 71 is made of a mixture of PVC and elastic cloth, and the weak elastic portion 72 is made of leather, and the two portions are joined together by sewing. The first cushion 3 and the second cushion 4 use the shaped sponge.

In theory, the strong elastic portion 71 only needs to be able to completely cover the gap K between the seat bottom frame 1 and the leg rest 2 and extend along the edge of the leg rest 2. However, in the actual production process of the wrapping layer, the process flow of cutting the strong elastic part 71 and the weak elastic part 72 into such shapes and then sewing the two together is relatively complicated and the cost is higher. Based on this, the strong elastic portion 71 extends along the length direction of the gap K and extends to the edge of the coating layer 7, so that the strong elastic portion 71 is linear strip-shaped, and the weak elastic portion 72 is square sheet-shaped, and cutting and sewing are both simple and convenient.

It is also worth noting that when the leg rest 2 moves outwards, the outer corner at the rear part of the leg rest 2 protrudes outwards relative to the side edge of the seat bottom frame 1, so that the weak elastic part 72-a at the position is tensioned, and because the strong elastic part 71 is closer to the position, on the premise that the strong elastic part is elastically stretched, the weak elastic part 72 at the outer corner at the rear part of the leg rest 2 cannot be pulled to deform, but compared with other parts of the leg rest 2, the pulled part has a larger pulling degree, so that the outer corner at the rear part of the second seat cushion 4 can be pressed inwards, on one hand, the left side edge and the right side edge of the base are closer to a straight line, the seat at a overlooking view angle is closer to an isosceles trapezoid, and then the shape of the seat is more suitable for the sitting posture that two legs of a user open left and right, which accords with ergonomics, and the comfort level of the user is improved; on the other hand, the outer corner at the rear part of the second seat cushion 4 can be upwards raised when being inwards extruded, and the shape of the upwards raised left and right sides at the rear part of the first seat cushion 3 is matched, so that a structure for wrapping the buttocks and the root of the thigh of a user is formed, and the comfort level of the user is further improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments can be modified, or some technical features can be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable chair seat comprises a chair seat underframe and a first cushion fixed on the chair seat underframe; the chair is characterized in that leg supports and a second seat cushion fixed on the leg supports are arranged beside the left side and the right side of the front part of the bottom frame of the chair seat; the chair also comprises a sliding rail frame arranged on the bottom frame of the chair seat, and the leg support can move left and right on the sliding rail frame; the chair also comprises an adjusting mechanism which can drive the two leg supports to synchronously move in opposite directions and is used for adjusting the opening degree of the front part of the chair seat.

2. The adjustable seat according to claim 1, wherein the seat bottom frame is formed with notches on the left and right sides of the front portion; the leg support is embedded in the notch when the front part of the chair seat is unfolded to the minimum.

3. The adjustable seat of claim 2, wherein the seat bottom frame comprises a main frame, and side wing frames attached to the left and right sides of the rear portion of the main frame; the side frames of the front part of the main frame body and the front frames of the side wing frame bodies form a gap of the bottom frame of the chair seat.

4. The adjustable seat according to claim 1 or 2, wherein the slide rail comprises at least one slide bar provided on the seat bottom frame and extending left and right, a slide slidably fitted over the slide bar; the sliding piece is fixedly connected with the leg support.

5. The adjustable seat according to claim 4, wherein the adjustment mechanism includes a pivot shaft disposed on the seat bottom frame and extending left and right, two adjustment members threaded onto the pivot shaft in opposite mating directions; and the two adjusting pieces are respectively and fixedly connected with the corresponding leg supports.

6. The adjustable seat of claim 5, wherein the sliding member and the adjustment member are fixed to the inside of the leg rest, and the sliding bar and the rotating shaft penetrate into the inside of the leg rest; one end of the rotating shaft penetrates through the leg support and is provided with a rotating structure.

7. The adjustable seat according to claim 1 or 2, further comprising a cover surrounding the first cushion and the two second cushions.

8. The adjustable seat of claim 7, wherein said cover includes a weak spring portion, a strong spring portion joined together; the strong elastic part at least covers a gap generated between the bottom frame of the seat and the leg support under the unfolding degree of the front part of the seat.

9. The adjustable seat of claim 8, wherein the strong spring portion extends along the length of the slot and to the edge of the cover.

10. An adjustable seat as claimed in claim 1 or claim 2, wherein the left and right sides of the rear portion of the seat base frame have a support formation extending fore and aft and projecting upwardly.