WO2015196850A1

WO2015196850A1 - Chair with seat cushion moving forward and dropping simultaneously during backward leaning of chair back

Info

Publication number: WO2015196850A1
Application number: PCT/CN2015/076829
Authority: WO
Inventors: 陈国巨
Original assignee: 陈国巨
Priority date: 2014-06-26
Filing date: 2015-04-17
Publication date: 2015-12-30
Also published as: CN203952966U

Abstract

A chair with a seat cushion moving forward and dropping simultaneously during backward leaning of a chair back. The chair comprises a chair frame (1), a seat cushion (2), a chassis bracket (3), and further comprises a front side link (4), a rear side link (5), an eccentric wheel (6) and a spring device, wherein the chair frame (1) serving as a stand and the seat cushion (2) serving as a connecting rod form a hinge four-link double-rocker mechanism together with the front side link (4) and the rear side link (5); the chair frame (1) is hinged with the front side link (4) by means of the eccentric wheel (6); the chassis bracket (3) is hinged with the chair frame (1) and the front side link (4); the spring device is arranged between the chassis bracket (3) and the chair frame (1). The gravity center of a user moves forward when the user leans backward because the seat cushion (2) moves forward and drops simultaneously when the chair frame (1) leans backward, and thus the stability and the sitting comfort of the chair are guaranteed.

Description

Chair with the seat cushion forward and lowered at the back of the chair

[Technical Field]

The utility model relates to a chair, in particular to a chair which is moved forward and lowered at the same time when the back of the chair is raised.

【Background technique】

In order to improve the comfort, some chairs have the function of reclining the back of the chair. Generally, the seat cushion can be connected to the chassis. When the chair frame is tilted, the seat cushion is automatically adjusted to a suitable angle with the seat frame. . When the chair of the prior art is tilted back, the center of gravity of the seat cushion will also move backwards with the backrest of the backrest, which deteriorates the stability of the chair and increases the possibility that the chair will fall backwards. At the same time, when the chair frame is tilted back, the front end of the seat cushion will be raised to a height, so that the thigh is pressed and feels uncomfortable.

[utility content]

The technical problem to be solved by the present invention is to avoid the deficiencies of the prior art and to provide a chair in which the seat frame drives the seat cushion to move forward and descend when the seat is back.

The technical solution adopted by the utility model to solve the technical problem is to provide a chair that moves forward and simultaneously descends when the seat is tilted back, including a chair frame, a seat cushion and a chassis bracket; and also includes a front connecting rod and a rear connecting frame a lever, an eccentric wheel and a spring device, the frame frame serving as a frame and a seat cushion as a connecting rod, and a front four-bar double rocker mechanism together with the front connecting rod and the rear connecting rod, wherein the seat frame and the front connecting rod The eccentric wheel is hinged; the chassis bracket is hinged with the seat frame and the front connecting rod; and a spring device is installed between the chassis bracket and the seat frame.

The spring device comprises a spring, a spring baffle and a spring pull rod, the spring baffle has a perforation, and the spring pull rod may comprise a flange flange disc, a spring pull rod rod and a spring pull rod pin, the rear end of the spring rod rod body is The flange flange and the front end are spring pull rod pins perpendicular to the axis thereof. The spring baffle is fixed on the chassis bracket, the spring pull rod body passes through the spring and the spring baffle, and the spring pull rod pin is hinged with the seat frame.

The chair frame is formed into a L shape by a vertical seat back and a lateral chassis. The middle part of the bottom frame is fixed with a rear frame pin of the seat frame, and the front end is vertically arranged with a perforation on the seat frame, a front frame pin and a frame frame of the frame frame. The lower perforation, the rear pin of the frame frame and the perforation of the rear connecting rod constitute a hinge connection; the perforation on the frame frame is hingedly connected with the pin shaft of the chassis bracket, and the perforation under the seat frame is hingedly connected with the pin of the spring pull rod; the eccentric wheel is fixed at the hinge The front of the frame is on the pin.

The eccentric wheel includes an inner hole of the eccentric wheel and an outer contour circle of the eccentric wheel, and the central axis of the outer circumference of the eccentric wheel and the outer contour circle of the eccentric wheel are different axes. In the original installation state of the chair, the central axis of the inner hole of the eccentric wheel The central axis of the outer contour circle of the eccentric wheel is on a straight line which is perpendicular to a line passing through the pin holder A3 of the chassis bracket and the lower shaft A4 of the chassis bracket.

The front connecting rod has a perforation on the front connecting rod, a perforation in the front connecting rod and a lower perforating in the front connecting rod from top to bottom, the perforation on the front connecting rod, the perforation in the front connecting rod and the front The lower perforations of the connecting rods are respectively hingedly connected with the front pin shaft of the seat cushion, the eccentric wheel and the lower pin of the chassis bracket.

The rear connecting rod has a perforation on the rear connecting rod and a lower perforating in the rear connecting rod, and the perforating on the rear connecting rod and the lower perforating in the rear connecting rod are respectively connected with the rear pin of the seat cushion and the rear pin shaft of the seat frame. .

The chassis bracket has a chassis bracket pin shaft and a chassis bracket lower pin shaft, and the chassis bracket upper pin shaft and the chassis bracket lower pin shaft are respectively hingedly connected with the perforation on the seat frame and the lower perforation of the front connecting rod.

Compared with the prior art, the utility model has the beneficial effects that: the hinge four-bar double rocker mechanism is adopted, and the eccentric wheel and the spring device are arranged to adjust, so that the seat cushion can be moved forward and lowered at the same time when the seat frame is tilted back, the seater When the back is tilted, the center of gravity moves forward to ensure the stability of the chair; when the seat cushion is lowered, the seated feet can naturally stand and the thighs are not pressed, which can improve the comfort and safety of the ride.

[Description of the Drawings]

1 is a schematic view showing the assembly of a front projection part according to a preferred embodiment of the present invention;

Figure 2 is an exploded view of the preferred embodiment of the present invention;

Figure 3 is a schematic view of the natural state of the chair;

Figure 4 is a schematic view showing the state in which the back of the chair is rotated by the pressure, and the seat cushion is pushed forward and lowered;

Figure 5 is a schematic view showing the state in which the chair continues to be rotated by the pressure back, and the seat cushion is pushed forward and lowered.

Fig. 6 is a schematic view showing the comparison of the change of the chair frame and the seat cushion in the above three states of the chair.

In the figure: 1 is a seat frame, 11 is a seat back, 12 is a chassis, 2 is a seat cushion, 3 is a chassis bracket, 4 is a front linkage pole, 5 is a rear linkage pole, 6 is an eccentric wheel, 7 is a spring, 8 is a spring baffle, 9 is a spring pull rod, 91 is a flange flange disc, and 92 is a spring pull rod rod;

A1 is the seat rear pin, A2 is the seat front pin, A3 is the chassis bracket pin, A4 is the chassis bracket lower pin, A5 is the seat frame rear pin, A6 is the seat frame front pin, A7 is the eccentric Outer contour circle, A8 is spring pull rod pin;

B1 is the perforation on the rear connecting rod, B2 is the perforation on the front connecting rod, B3 is the perforation on the seat frame, B4 is the perforation under the front connecting rod, B5 is the perforation under the rear connecting rod, B6 is the inner hole of the eccentric wheel, B7 is the perforation in the front connecting rod, and B8 is the perforation under the seat frame.

The number of all the above parts may be one or more.

【detailed description】

The present invention will be further described below in conjunction with the accompanying drawings.

Referring to FIG. 1 to FIG. 6 , the chair of the present invention is moved forward and lowered at the same time, and includes a chair frame 1 , a seat cushion 2 , a chassis bracket 3 , and a front connecting rod 4 and a rear connecting rod 5 . The eccentric wheel 6 and the spring device, the seat frame 1 serves as a frame and a seat cushion 2 as a connecting rod, and together with the front connecting rod 4 and the rear connecting rod 5 constitute a hinged four-bar double rocker mechanism, wherein the seat frame 1 and the frame 1 The front connecting rod 4 is hinged by an eccentric wheel 6; the chassis bracket 3 is hinged to the seat frame 1 and the front connecting rod 4; and a spring device is mounted between the chassis bracket 3 and the seat frame 1.

In a preferred embodiment of the invention:

The spring device comprises a spring 7, a spring baffle 8 and a spring pull rod 9, the spring baffle 8 having a perforation, the spring pull rod 9 comprising a flange flange disc 91, a spring pull rod rod 92 and a spring pull rod pin A8 The rear end of the spring rod body 92 is a flange flange 91, and the front end is a spring pull rod pin A8 perpendicular to its axis. The spring baffle 8 is fixed to the chassis bracket 3, and the spring rod rod 92 passes through the spring 7 and the spring baffle. 8. The spring pull rod pin A8 is hinged to the seat frame 1.

The chair frame 1 is formed into an L shape by a vertical seat back 11 and a lateral chassis 12, and a frame rear pin A5 is fixed in the middle portion of the chassis 12, and the front end is vertically arranged with a perforation B3 on the seat frame and a frame frame. The front pin A6 and the bottom frame piercing B8, the rear frame pin A5 and the rear frame bar under the hole B5 form a hinge connection; the seat frame perforation B3 and the chassis bracket pin A3 form a hinge connection, the frame frame under the hole B8 It is hingedly connected with the spring pull rod pin A8; the eccentric wheel 6 is fixed to the front frame pin A6 of the seat frame.

The eccentric wheel 6 includes an eccentric inner bore B6 and an eccentric outer contour circle A7. The eccentric inner bore B6 and the eccentric outer contour circle A7 have different axes of the central axis. The eccentric wheel is installed in the original state of the chair. The central axis of the inner hole B6 and the central axis of the outer contour circle A7 of the eccentric are on the same straight line which is perpendicular to a line passing through the pin A3 of the chassis bracket and the pin A4 of the chassis bracket.

The front connecting rod 4 has a front connecting rod perforation B2, a front connecting rod middle perforation B7 and a front connecting rod lower perforating B4, and a front connecting rod perforating B2 and a front connecting frame. The rod through hole B7 and the front link rod lower hole B4 are hingedly connected to the seat cushion front pin A2, the eccentric wheel 6, and the chassis bracket lower pin A4, respectively.

The rear connecting rod 5 has a rear connecting rod perforation B1 and a rear connecting rod lower perforating B5, a rear connecting rod upper perforation B1 and a rear connecting rod lower perforating B5 respectively, and a cushion rear pin A1 and a seat frame The rear pin A5 constitutes a hinged connection.

The chassis bracket 3 has a chassis bracket pin A3 and a chassis bracket lower pin A4, and the chassis bracket upper pin A3 and the chassis bracket lower pin A4 respectively form a perforation B3 on the seat frame and a perforation B4 under the front frame rod. Hinge connection.

In the original positioning, reclining and resetting of the seat back 11, the spring device functions as a buffer, a support and a reset.

The front connecting rod 4 defines a swing range: when the chassis support pin axis A4 axis coincides with the origin of the Cartesian coordinate system, the rotation range is within the first quadrant of the Cartesian coordinate system.

In the original installation state, the seat frame 1 rotates counterclockwise with the pin A3 of the chassis bracket as the axis and drives the front link rod 4 to rotate in the opposite direction of the chassis support pin A4, in front of the frame during the movement. The radial distance between the axis of the pin A6 and the axis of the perforation B7 in the front link bar changes, and the eccentric 6 automatically rotates to a suitable position for smooth linkage.

When a person sits on a chair and moves back on the seat frame 1, the seat frame 1 rotates counterclockwise (backward) with the pin A3 of the chassis bracket as an axis, while the front pin A6 of the frame passes the eccentric wheel. 6 Drive the front connecting rod 4 to rotate in the opposite direction (forward) with the chassis bracket lower pin A4 as the axis, and move the seat cushion forward and downward by the perforation B2 on the front connecting rod (because the front connecting rod 4 rotates) The range is the first quadrant of the Cartesian coordinate system), after The connecting rod 5 changes the angle with the change of the position of the seat cushion 2, and automatically adjusts the most comfortable tilt angle to the seat cushion 2. During the movement of the seat frame 1, the seat frame 1 is always controlled by the spring pull rod 9 to expand and contract the spring 7 to obtain cushioning, support and reset.

In addition, due to the lowering of the seat cushion, the human foot plate always supports the thigh without being pressed by the seat cushion. Since the forward movement of the seat cushion causes the human body to have a stretching action, it helps to eliminate fatigue.

Claims

A chair with a seat cushion that moves forward and descends at the same time, including a seat frame (1), a seat cushion (2), and a chassis bracket (3), characterized in that:

Also included are a front connecting rod (4), a rear connecting rod (5), an eccentric (6) and a spring device, the seat frame (1) serving as a frame and a seat cushion (2) as a connecting rod, connected to the front The frame rod (4) and the rear frame rod (5) together constitute a hinged four-bar double rocker mechanism, wherein the frame frame (1) and the front frame rod (4) are hinged by an eccentric wheel (6); the chassis bracket (3) Hinged with the seat frame (1) and the front connecting rod (4); a spring device is installed between the chassis bracket (3) and the seat frame (1).
The chair according to claim 1, wherein the seat cushion is moved forward and lowered at the same time, and is characterized in that:

The spring device comprises a spring (7), a spring baffle (8) and a spring pull rod (9), the spring baffle (8) having a perforation, the spring pull rod (9) comprising a flange flange disc (91) ), the spring pull rod body (92) and the spring pull rod pin (A8), the rear end of the spring pull rod body (92) is a flange flange disc (91), and the front end is a spring pull rod pin (A8) perpendicular to its axis, the spring The baffle (8) is fixed to the chassis bracket (3), the spring pull rod body (92) passes through the spring (7) and the spring baffle (8), and the spring pull rod pin (A8) is hinged to the seat frame (1).
The chair according to claim 1, wherein the seat cushion is moved forward and lowered at the same time, and is characterized in that:

The chair frame (1) is formed in an L shape by a vertical seat back (11) and a lateral chassis (12), and a rear frame (12) is fixed with a rear frame pin (A5), and the front end is vertically arranged. There are perforations on the frame (B3), the front pin (A6) of the frame and the perforation under the frame (B8), and the rear pin (A5) of the frame and the rear perforation (B5) of the rear frame constitute a hinge connection; The perforation on the frame (B3) is hingedly connected with the pin (A3) on the chassis bracket, and the perforation under the frame (B8) is hinged with the spring pull pin (A8); the eccentric (6) is fixed to the front pin of the frame (A6).
A chair for reclining and descending at the same time as the back of the chair according to claim 1 is characterized by:

The eccentric (6) includes an eccentric inner bore (B6) and an eccentric outer contour circle (A7), the eccentric inner bore (B6) and the eccentric outer contour circle (A7) have different axes of the central axis, in the chair In the original installation state, the central axis of the inner hole (B6) of the eccentric wheel and the central axis of the outer contour circle (A7) of the eccentric are on the same straight line, and the straight line passes through the pin A3 and the chassis bracket passing through the chassis bracket. The straight line of the lower pin A4 is perpendicular.
The chair according to claim 1, wherein the seat cushion is moved forward and lowered at the same time, and is characterized in that:

The front connecting rod (4) has a front connecting rod perforation (B2), a front connecting rod perforation (B7) and a front connecting rod lower perforating (B4) from top to bottom, the front connecting frame Perforation on the rod (B2), perforation in the front linkage (B7) and perforation in the front linkage (B4) with the front pin (A2), eccentric (6) and chassis The lower bracket pin (A4) forms a hinge connection.
The chair according to claim 1, wherein the seat cushion is moved forward and lowered at the same time, and is characterized in that:

The rear connecting rod (5) has a perforation on the rear connecting rod (B1) and a perforation in the rear connecting rod (B5), a perforation on the rear connecting rod (B1) and a perforating in the rear connecting rod (B5) It is hinged with the rear seat pin (A1) and the rear frame pin (A5).
The chair according to claim 1, wherein the seat cushion is moved forward and lowered at the same time, and is characterized in that:

The chassis bracket (3) has a chassis bracket pin (A3) and a chassis bracket lower pin (A4), a chassis bracket upper pin (A3) and a chassis bracket lower pin (A4) respectively pierced with the seat frame (B3) and the front connecting rod under the perforation (B4) constitute a hinge connection.