Seat adjustment linkage mechanism

Abstract

The present invention discloses a seat adjustment linkage mechanism, wherein a slide rail is fixed to the top of a base frame, the lower end of a front support of a seat cushion is slidably connected to the slide rail, the fixed end of an electric push rod is hinged to the base frame, the push rod end of the electric push rod is hinged to the front support of the seat cushion, the front end of a seat cushion fixing plate is hinged to the upper end of the front support of the seat cushion, the lower end of a rear connecting rod is hinged to the base frame, the upper end of a rear connecting rod is hinged to the rear end of the seat cushion fixing plate, one end of a connecting rod is hinged to a rear connecting rod, and the other end of the connecting rod is connected to the leg support frame through a leg support linkage mechanism, the fixed end of the electric push rod is located at the rear lower portion of the seat cushion fixing plate, and the telescopic end of the electric push rod is located at the front lower portion of the seat cushion fixing plate. The effect is as follows: through a computer chair adjustment linkage structure of the present invention, only one electric push rod is required to realize the functions of adjusting the seat cushion inclination and lifting the leg support; the leg support can be easily changed to an independent electric adjustment, realizing simultaneous adjustment of normal sitting state, zero gravity state and competitive state.

Description

Technical Field

[0001] The present invention relates to the technical field of office equipment, and in particular to a seat adjustment linkage mechanism. Background Art

[0002] With the continuous improvement of people's living standards and the rapid development of network technology, computers have become an indispensable daily and office supplies. Nowadays, people often use computers for work, surfing the Internet, playing games, watching movies, listening to music, etc. When using computers for a long time, the quality of computer chairs is directly related to the health of users.

[0003] Currently, office chairs, computer chairs, and gaming cockpits on the market all offer two seat adjustment modes: normal sitting mode and zero-gravity mode. A few also feature forward tilt adjustment. Most use manual adjustment or multiple (or more) motors to switch between these modes, resulting in complex structures, high costs, and inconvenient maintenance.

[0004] Among them, the normal sitting posture is defined as: the seat cushion is horizontal and the leg rest is folded up; the zero-gravity mode is defined as: the seat cushion is tilted backward at a certain angle and the leg rest is raised; the competitive state is defined as: the front end height of the seat cushion remains basically unchanged, the rear end is lifted up at a certain angle, and the leg rest is folded up. Summary of the Invention

[0005] To this end, the present invention provides a seat adjustment linkage mechanism to solve the above-mentioned problems in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The top end of the seat cushion is fixed with the support frame, and the bottom end of the seat cushion is fixed with the support frame, and the bottom end of the seat cushion is fixed with the support frame.

[0008] Furthermore, the upper end of the rear seat connecting rod is hinged to the middle part of the seat cushion fixing plate.

[0009] Furthermore, the leg support linkage mechanism includes a first link, a second link, a third link and a fourth link, one end of the first link is hinged to one end of the connecting rod away from the rear seat link, the middle part of the first link is hinged to the side of the seat cushion fixing plate, the other end of the first link is hinged to one end of the third link, the other end of the third link is hinged to the leg support frame, one end of the second link is hinged to the side of the seat cushion fixing plate, the other end of the second link is hinged to one end of the fourth link, and the other end of the fourth link is hinged to the leg support frame.

[0010] Furthermore, a middle portion of the second connecting rod is hinged to a middle portion of the third connecting rod.

[0011] Furthermore, the hinged connection between the second connecting rod and the side surface of the seat cushion fixing plate is located obliquely above the hinged connection between the first connecting rod and the side surface of the seat cushion fixing plate.

[0012] Furthermore, there are two slide rails, the lower end of the seat cushion front bracket is slidably connected to the two slide rails, and the two slide rails are arranged parallel to each other.

[0013] Furthermore, the electric push rod is arranged between the two slide rails, and the two slide rails are symmetrically arranged with respect to the electric push rod.

[0014] Furthermore, the rear-seat connecting rod, the connecting rod and the leg-support connecting rod mechanism are each divided into two groups, and one group of the rear-seat connecting rod, the connecting rod and the leg-support connecting rod mechanism is respectively provided on both sides of the seat cushion fixing plate.

[0015] Furthermore, the length of the rear seat connecting rod is greater than the length of the vertical support rod of the seat cushion front bracket, and the top of the vertical support rod of the seat cushion front bracket is hinged to the seat cushion fixing plate.

[0016] Furthermore, it also includes a rotating shaft, a bearing combination and a sleeve. The two ends of the rotating shaft are respectively connected to the top of the vertical support rod of the front support of the seat cushion through the rotating rod of the bearing combination. The two ends of the rotating shaft are located on the outside of the bearing combination. The sleeve is provided. The sleeve is installed in the seat cushion fixing plate.

[0017] The present invention has the following advantages: through the computer chair adjustment linkage structure of the present invention, only one electric push rod is needed to achieve the functions of seat cushion inclination adjustment and leg rest lifting; the leg rest can be easily changed to independent electric adjustment, realizing simultaneous adjustment of normal sitting state, zero gravity state and competitive state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0020] Figure 1 A three-dimensional structural diagram of a seat adjustment linkage mechanism in a normal sitting position provided in some embodiments of the present invention.

[0021] Figure 2 A planar structural diagram of a seat adjustment linkage mechanism in a normal sitting position provided in some embodiments of the present invention.

[0022] Figure 3 A three-dimensional structural diagram of a seat adjustment linkage mechanism in a zero-gravity state provided in some embodiments of the present invention.

[0023] Figure 4 A planar structural diagram of a seat adjustment linkage mechanism in a zero-gravity state provided in some embodiments of the present invention.

[0024] Figure 5 A three-dimensional structural diagram of a seat adjustment linkage mechanism in a competitive state provided in some embodiments of the present invention.

[0025] Figure 6 A planar structural diagram of a seat adjustment linkage mechanism in a competitive state provided in some embodiments of the present invention.

[0026] Figure 7 An exploded view of a seat adjustment linkage mechanism provided in some embodiments of the present invention.

[0027] In the figure: 1. base frame, 2. electric push rod, 3. seat front bracket, 4. seat cushion fixing plate, 5. slide rail, 6. rear seat connecting rod, 7. leg support connecting rod mechanism, 8. leg support frame, 9. connecting rod, 10. first connecting rod, 11. second connecting rod, 12. third connecting rod, 13. fourth connecting rod, 14. rotating shaft, 15. bearing assembly. DETAILED DESCRIPTION

[0028] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0029] like Figures 1 to 7 As shown, a seat adjustment linkage mechanism in the embodiment of the first aspect of the present invention includes a base frame 1, an electric push rod 2, a front seat bracket 3, a seat cushion fixing plate 4, a slide rail 5, a rear seat connecting rod 6, a leg support connecting rod mechanism 7, a leg support frame 8 and a connecting rod 9. The top of the base frame 1 is fixed with a slide rail 5, the lower end of the front seat bracket 3 is slidably connected to the slide rail 5, the fixed end of the electric push rod 2 is hinged to the base frame 1, the push rod end of the electric push rod 2 is hinged to the front seat bracket 3, the front end of the seat cushion fixing plate 4 is hinged to the upper end of the front seat bracket 3, the lower end of the rear seat connecting rod 6 is hinged to the base frame 1, the upper end of the rear seat connecting rod 6 is hinged to the rear end of the seat cushion fixing plate 4, one end of the connecting rod 9 is hinged to the rear seat connecting rod 6, and the other end of the connecting rod 9 is connected to the leg support frame 8 through the leg support connecting rod mechanism 7, the fixed end of the electric push rod 2 is located at the rear and lower part of the seat cushion fixing plate 4, and the telescopic end of the electric push rod 2 is located at the front and lower part of the seat cushion fixing plate 4.

[0030] In the above embodiment, it should be noted that the electric push rod 2 is a telescopic push rod driven by a mature motor in the prior art. In addition, the electric push rod 2 can also be replaced by a hydraulic cylinder, an air cylinder, and a nut-screw pair and other structures. The front seat bracket 3 is located in front of the seat fixing plate 4, and the rear seat connecting rod 6 is located behind the seat fixing plate 4.

[0031] The adjustment principle of this embodiment is as follows: in normal sitting posture, the seat cushion fixing plate 4 is in a horizontal state, and the leg support frame 8 is in a vertical state; in zero gravity state, the seat cushion fixing plate 4 is tilted backward at a certain angle, and the leg support frame 8 is lifted up at a certain angle; in competitive state, the front end of the seat cushion fixing plate 4 is tilted forward and downward at a certain angle, and the lower end of the leg support frame 8 is in a backward retracted state; the lower part of the seat cushion front bracket 3 is hinged on the telescopic push rod of the electric push rod 2, the lower end of the seat cushion front bracket 3 is fixed on the slider, and the upper end of the seat cushion front bracket 3 is fixed to the bearing assembly 15; the upper end of the rear connecting rod 6 is hinged to the seat cushion fixing plate 4, and the lower end of the rear connecting rod 6 is hinged to the base frame 1; the front end of the connecting rod 9 is hinged to the leg support connecting rod mechanism 7, and the rear end of the connecting rod 9 is hinged to the rear connecting rod 6; in normal sitting posture, Figure 5 and Figure 6As shown, when the push rod end of the electric push rod 2 is retracted, it drives the seat cushion front bracket 3 to move backward, and the seat cushion front bracket 3 drives the seat cushion fixing plate 4 to move backward, and finally tilts forward and downward to form a certain angle with the horizontal plane. At the same time, the seat cushion fixing plate 4 and the connecting rod 9 drive the leg support connecting rod mechanism 7 to move backward, and finally drive the leg support frame 8 to retract, thereby switching from the normal sitting state to the competitive state; on the contrary, Figure 3 and Figure 4 As shown, when the push rod end of the electric push rod 2 is extended, it drives the front support 3 of the seat cushion to move forward, and the front support 3 of the seat cushion drives the seat cushion fixing plate 4 to move, and finally the seat cushion fixing plate 4 tilts backward to form a certain angle with the horizontal plane. At the same time, the seat cushion fixing plate 4 and the connecting rod 9 drive the leg support connecting rod mechanism 7 to move backward, and finally drive the leg support frame 8 to retract.

[0032] The technical effect achieved by the above embodiment is: through a computer chair adjustment linkage structure of this embodiment, only one electric push rod is required to achieve the functions of seat cushion inclination adjustment and leg rest lifting; the leg rest can be easily changed to independent electric adjustment, realizing simultaneous adjustment of normal sitting state, zero gravity state and competitive state.

[0033] Optional, such as Figures 1 to 7 As shown, in some embodiments, the upper end of the rear-seat connecting rod 6 is hinged to the middle of the seat cushion fixing plate 4.

[0034] In the above optional embodiment, it should be noted that a connecting ear is provided on the side of the seat cushion fixing plate 4 , and the upper end of the rear seat connecting rod 6 is hinged to the connecting ear on the side of the middle part of the seat cushion fixing plate 4 .

[0035] The beneficial effect of the above optional embodiment is that by providing the rear-seat connecting rod 6, it can not only support the seat cushion fixing plate 4, but also drive the seat cushion fixing plate 4 to flip forward and upward or to be folded backward and upward.

[0036] Optional, such as Figures 1 to 7 As shown, in some embodiments, the leg support linkage mechanism 7 includes a first link 10, a second link 11, a third link 12 and a fourth link 13, one end of the first link 10 is hinged to the end of the connecting rod 9 away from the rear seat link 6, the middle part of the first link 10 is hinged to the side of the seat cushion fixing plate 4, the other end of the first link 10 is hinged to one end of the third link 12, the other end of the third link 12 is hinged to the leg support frame 8, one end of the second link 11 is hinged to the side of the seat cushion fixing plate 4, the other end of the second link 11 is hinged to one end of the fourth link 13, and the other end of the fourth link 13 is hinged to the leg support frame 8.

[0037] In the above optional embodiment, it should be noted that the connecting rod 9, the first connecting rod 10 and the third connecting rod 12 constitute a Z-shaped bending hinge connecting rod structure, and the second connecting rod 11 and the fourth connecting rod 13 constitute a V-shaped hinge connecting rod structure.

[0038] The beneficial effect of the above optional embodiment is: by setting the leg support connecting rod mechanism 7 composed of the first connecting rod 10, the second connecting rod 11, the third connecting rod 12 and the fourth connecting rod 13, the single electric push rod 2 can simultaneously drive the joint action of the seat cushion fixing plate 4 and the leg support frame 8, which greatly reduces the processing cost.

[0039] Optional, such as Figures 1 to 7 As shown, in some embodiments, the middle portion of the second link 11 is hinged to the middle portion of the third link 12 .

[0040] In the above optional embodiment, it should be noted that the connection between the third connecting rod 12 and the second connecting rod 11 is slightly curved.

[0041] The beneficial effect of the above optional embodiment is that the stability of the opening and closing action of the leg support link mechanism 7 is enhanced by hingedly connecting the middle portion of the second link 11 with the middle portion of the third link 12.

[0042] Optional, such as Figures 1 to 7 As shown, in some embodiments, the hinge point between the second connecting rod 11 and the side surface of the seat cushion fixing plate 4 is located obliquely above the hinge point between the first connecting rod 10 and the side surface of the seat cushion fixing plate 4 .

[0043] In the above optional embodiment, it should be noted that during the expansion or contraction process, the second link 11 and the first link 10 always remain parallel to each other, and the third link 12 and the fourth link 13 always remain parallel to each other.

[0044] The beneficial effect of the above optional embodiment is that the stability of the leg support frame 8 when unfolded is enhanced through the above arrangement.

[0045] Optional, such as Figures 1 to 7 As shown, in some embodiments, there are two slide rails 5, the lower end of the seat cushion front bracket 3 is slidably connected to the two slide rails 5, and the two slide rails 5 are arranged parallel to each other.

[0046] In the above optional embodiment, it should be noted that the lower end of the seat cushion front bracket 3 is slidably connected to the slide rail 5 via a slider.

[0047] The beneficial effect of the above optional embodiment is that by providing two slide rails 5 , the stability of the flipping of the seat cushion fixing plate 4 is enhanced.

[0048] Optional, such as Figures 1 to 7 As shown, in some embodiments, the electric push rod 2 is arranged between two slide rails 5, and the two slide rails 5 are symmetrically arranged about the electric push rod 2.

[0049] In the above optional embodiments, it should be noted that, in addition, the position of the electric push rod 2 can also be set according to actual needs.

[0050] The beneficial effects of the above optional embodiment are: through the above arrangement, the working stability of the electric push rod 2 is improved, and the force on the entire mechanism is more uniform.

[0051] Optional, such as Figures 1 to 7 As shown, in some embodiments, the rear-seat connecting rod 6, the connecting rod 9 and the leg support connecting rod mechanism 7 are each divided into two groups, and one group of rear-seat connecting rod 6, the connecting rod 9 and the leg support connecting rod mechanism 7 is respectively provided on both sides of the seat cushion fixing plate 4.

[0052] In the above optional embodiments, it should be noted that, in addition, the number of groups of the seat-back connecting rod 6, the connecting rod 9 and the leg support connecting rod mechanism 7 can also be set according to actual needs.

[0053] The beneficial effects of the above optional embodiment are: by arranging the above components into two groups, the stability of the operation of the entire device is enhanced and the service life of the adjustment structure is significantly increased.

[0054] Optional, such as Figures 1 to 7 As shown, in some embodiments, the length of the rear seat connecting rod 6 is greater than the length of the vertical support rod of the seat cushion front bracket 3, and the top of the vertical support rod of the seat cushion front bracket 3 is hinged to the seat cushion fixing plate 4.

[0055] In the above optional embodiments, it should be noted that, in addition, the number of groups of the seat-back connecting rod 6, the connecting rod 9 and the leg support connecting rod mechanism 7 can also be set according to actual needs.

[0056] The beneficial effects of the above optional embodiment are: by arranging the rear-seat connecting rod 6, the connecting rod 9 and the leg support connecting rod mechanism 7 into two groups, the entire device works stably and runs more smoothly.

[0057] Optional, such as Figures 1 to 7 As shown, in some embodiments, it also includes a rotating shaft 14, a bearing assembly 15 and a sleeve. The two ends of the rotating shaft 14 are respectively connected to the top of the vertical support rod of the front support 3 of the seat cushion through the rotating rod of the bearing assembly 15. The two ends of the rotating shaft 14 are located on the outside of the bearing assembly 15. The sleeve is provided with a sleeve, and the sleeve is installed in the seat cushion fixing plate 4.

[0058] In the above optional embodiment, it should be noted that the seat cushion fixing plate 4 is a U-shaped bent plate structure, and the shaft sleeve is a circular plate structure, which is connected to the inner side of the seat cushion fixing plate 4 by bolts.

[0059] The beneficial effect of the above optional embodiment is that by providing the rotating shaft 14, the bearing assembly 15 and the shaft sleeve, the rotation stability of the seat cushion fixing plate 4 is significantly improved.

[0060] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

[0061] The terms "upper", "lower", "left", "right", "middle", etc. used in this specification are only for the convenience of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships should be regarded as within the scope of the present invention without substantially changing the technical content.

Claims

1. A seat adjustment linkage mechanism, characterized in that: The invention comprises a base frame (1), an electric push rod (2), a seat front bracket (3), a seat fixing plate (4), a slide rail (5), a seat rear connecting rod (6), a leg support connecting rod mechanism (7), a leg support frame (8) and a connecting rod (9), wherein the slide rail (5) is fixed to the top of the base frame (1), the lower end of the seat front bracket (3) is slidably connected to the slide rail (5), the fixed end of the electric push rod (2) is hinged to the base frame (1), the push rod end of the electric push rod (2) is hinged to the seat front bracket (3), and the front end of the seat fixing plate (4) is hinged to the seat front bracket (3). It is hinged to the upper end of the seat front bracket (3), the lower end of the seat rear connecting rod (6) is hinged to the base frame (1), the upper end of the seat rear connecting rod (6) is hinged to the rear end of the seat cushion fixing plate (4), one end of the connecting rod (9) is hinged to the seat rear connecting rod (6), and the other end of the connecting rod (9) is connected to the leg support frame (8) through the leg support connecting rod mechanism (7), the fixed end of the electric push rod (2) is located at the rear lower part of the seat cushion fixing plate (4), and the telescopic end of the electric push rod (2) is located at the front lower part of the seat cushion fixing plate (4); The upper end of the rear seat connecting rod (6) is hinged to the middle of the seat cushion fixing plate (4), there are two slide rails (5), the lower end of the seat cushion front bracket (3) is slidably connected to the two slide rails (5), and the two slide rails (5) are arranged parallel to each other.

2. The seat adjustment linkage mechanism according to claim 1, characterized in that: The leg support link mechanism (7) includes a first link (10), a second link (11), a third link (12) and a fourth link (13), one end of the first link (10) is hinged to one end of the connecting rod (9) away from the rear seat link (6), the middle part of the first link (10) is hinged to the side of the seat cushion fixing plate (4), the other end of the first link (10) is hinged to one end of the third link (12), the other end of the third link (12) is hinged to the leg support frame (8), one end of the second link (11) is hinged to the side of the seat cushion fixing plate (4), the other end of the second link (11) is hinged to one end of the fourth link (13), and the other end of the fourth link (13) is hinged to the leg support frame (8).

3. The seat adjustment linkage mechanism according to claim 2, characterized in that: The middle portion of the second connecting rod (11) is hinged to the middle portion of the third connecting rod (12).

4. The seat adjustment linkage mechanism according to claim 3, characterized in that: The hinge point between the second connecting rod (11) and the side of the seat cushion fixing plate (4) is located obliquely above the hinge point between the first connecting rod (10) and the side of the seat cushion fixing plate (4).

5. The seat adjustment linkage mechanism according to claim 1, characterized in that: The electric push rod (2) is arranged between the two slide rails (5), and the two slide rails (5) are symmetrically arranged with respect to the electric push rod (2).

6. The seat adjustment linkage mechanism according to claim 1, characterized in that: The seat-back connecting rod (6), the connecting rod (9) and the leg support connecting rod mechanism (7) are each in two groups, and one group of the seat-back connecting rod (6), the connecting rod (9) and the leg support connecting rod mechanism (7) is respectively provided on both sides of the seat cushion fixing plate (4).

7. The seat adjustment linkage mechanism according to claim 1, characterized in that: The length of the rear seat connecting rod (6) is greater than the length of the vertical support rod of the seat cushion front bracket (3), and the top of the vertical support rod of the seat cushion front bracket (3) is hinged to the seat cushion fixing plate (4).

8. The seat adjustment linkage mechanism according to claim 7, characterized in that: It also includes a rotating shaft (14), a bearing assembly (15) and a shaft sleeve, wherein the two ends of the rotating shaft (14) are respectively connected to the top of the vertical support rod of the seat cushion front bracket (3) through the rotating rod of the bearing assembly (15), and the two ends of the rotating shaft (14) are located outside the bearing assembly (15) and are provided with the shaft sleeve, which is installed in the seat cushion fixing plate (4).

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