Seat multi-connecting-rod adjusting mechanism

Abstract

The utility model relates to the technical field of seats, in particular to a seat multi-connecting-rod adjusting mechanism which comprises a base, a seat frame and a backrest assembly, the backrest assembly comprises a backrest connecting rod and a backrest mounting rod, and the seat multi-connecting-rod adjusting mechanism further comprises a foot support assembly and a connecting assembly which are hinged to each other. The foot support assembly comprises a foot support connecting rod, a rear rod, an upper connecting rod, a middle rod, a lower connecting rod and a foot support, the connecting assembly comprises a lower connecting rod and an upper connecting rod, and the base, the seat frame, the backrest assembly and the foot support assembly are mutually hinged through the connecting assembly. The chair is simple in structure and small in occupied space, the angle and the position of the backrest, the seat cushion and the foot support can be adjusted at the same time, and therefore the posture of the chair can be adjusted, and a human body can have a comfortable rest posture.

Description

Technical Field

[0001] This utility model relates to the field of seat technology, and specifically to a multi-link adjustment mechanism for seats. Background Technology

[0002] Seat adjustment is a crucial aspect of passenger comfort. High comfort levels ensure that passengers do not experience fatigue during long journeys, and a comfortable resting posture can alleviate fatigue and allow for sufficient rest. The multi-link adjustment mechanism of the seat, through one-button operation, can quickly and efficiently adjust passengers to a comfortable resting posture. This invention aims to solve the above series of practical problems.

[0003] In the existing technology, there are two adjustment methods. One method is to use three adjustment mechanisms to adjust the backrest angle, seat cushion angle, and footrest position and angle respectively. To achieve human posture adjustment, the above three mechanisms need to be adjusted separately. In this case, a controller is also needed to realize the linkage adjustment of the three mechanisms. The disadvantages of this seat adjustment method are that the system is complex, heavy, costly, and occupies a lot of space.

[0004] Another type is the seat with linked adjustment of the seat cushion and backrest disclosed in patent number CN102871387A, which can adjust the seat cushion and backrest at the same time. Or it is the multi-position adjustable seat disclosed in patent number CN108523495B, which can adjust the backrest and footrest at the same time.

[0005] Neither of the above two adjustment methods can simultaneously adjust the backrest, seat cushion, and footrest, resulting in poor comfort and failing to meet the requirements for a comfortable resting posture. Utility Model Content

[0006] This invention provides a multi-link adjustment mechanism for seats to address the problems of existing technologies.

[0007] The purpose of this utility model can be achieved through the following technical solution: a multi-link adjustment mechanism for a seat, including: a base, a seat frame and a backrest assembly, wherein the backrest assembly includes a backrest link and a backrest mounting link, and also includes a footrest assembly and a connecting assembly that are hinged to each other;

[0008] The footrest assembly includes a footrest link, a rear link, an upper link, a middle link, a lower link, and a footrest;

[0009] The connecting assembly includes a lower connecting rod and an upper connecting rod;

[0010] The base, seat frame, backrest assembly, and footrest assembly are hinged together by connecting components.

[0011] In a further improvement, the two ends of the footrest connecting rod are respectively hinged to the backrest mounting rod and the rear rod; the upper end of the rear rod is hinged to the seat frame and the lower end is hinged to the upper connecting rod; the upper end of the middle rod is hinged to the bottom frame and the middle and lower ends of the middle and lower connecting rods are respectively hinged to the middle and lower connecting rods; the upper end of the footrest is hinged to the upper connecting rod and the lower end is hinged to the lower connecting rod; the two ends of the lower connecting rod are respectively hinged to the footrest and the lower end of the middle rod; the upper end of the upper connecting rod is hinged to the footrest and the middle and lower ends of the middle and rear rods are respectively hinged to the middle rod and the rear rod.

[0012] In a further improvement, the base includes vertical beams and horizontal beams that are fixed to each other. A first rotating seat is fixedly provided on both sides of the vertical beam. A second rotating seat and a third rotating seat are fixedly provided on the upper and lower sides of the end of the seat frame, respectively, and a fourth rotating seat is fixedly provided at the front end. The first rotating seat and the third rotating seat are hinged together. The second rotating seat is hinged together with the backrest mounting rod, and the fourth rotating seat is hinged together with the rear rod.

[0013] In a further improvement, the upper and lower ends of the seat frame are respectively hinged to the backrest mounting rod and the base, and the front upper connecting rod is hinged to the front end.

[0014] In a further improvement, a rotating rod is provided between the backrest mounting rods, and the end of the backrest connecting rod is rotatably mounted on the rotating rod and its front end is hinged to the connecting assembly.

[0015] In a further improvement, a drive motor is provided on the side of the crossbeam away from the vertical beam, and the output end of the drive motor is connected to the lower end of the lower connecting rod.

[0016] As a further improvement, the footrest is provided with a mounting groove.

[0017] Compared with the prior art, this utility model has the following beneficial effects: In actual use, when the seat frame is unfolded, the lower front connecting rod rotates counterclockwise and moves upward, driving the upper front connecting rod to move through the hinge. The upper front connecting rod, through its hinge with the seat frame, causes the seat frame to lift upward. Since one end of the backrest connecting rod is hinged to both the lower and upper front connecting rods, when the lower front connecting rod rotates counterclockwise, it will drive the backrest connecting rod to move forward together. The backrest connecting rod, through its hinge, will then drive the backrest rod to rotate clockwise around the seat frame, causing the backrest rod to tilt. The clockwise rotation of the backrest rod, through the hinge, pushes the footrest connecting rod forward. The footrest linkage drives the rear rod to move clockwise around the seat frame via a hinge. The clockwise movement of the rear rod pushes the upper linkage forward via the hinge, thereby driving the middle rod to rotate clockwise. The clockwise movement of the middle rod also pushes the upper and lower linkages forward via the hinge, thereby driving the footrest to rotate clockwise to support the user's legs, as shown in the figure. When the seat frame is folded up, the lower front connecting rod rotates clockwise and moves downward. The above movements are reversed and cycled. The structure is simple, occupies little space, and allows for simultaneous adjustment of the angle and position of the backrest, seat cushion, and footrest, thereby achieving seat posture adjustment to allow the human body to reach a comfortable resting posture. Attached Figure Description

[0018] Figure 1 This is a simplified diagram of the present invention in its retracted state;

[0019] Figure 2 This is a simplified diagram of the present invention in its unfolded state;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the present invention in its folded state;

[0022] Figure 5 This is a schematic diagram of the structure of the present invention in its unfolded state.

[0023] In the diagram, 1 is the base; 101 is the vertical beam; 102 is the horizontal beam; 103 is the first rotating seat; 2 is the seat frame; 201 is the second rotating seat; 202 is the third rotating seat; 203 is the fourth rotating seat; 3 is the backrest connecting rod; 4 is the backrest mounting rod; 41 is the rotating rod; 5 is the foot support connecting rod; 6 is the rear rod; 7 is the upper connecting rod; 8 is the middle rod; 9 is the lower connecting rod; 10 is the foot support; 1001 is the mounting groove; 11 is the lower connecting rod; and 12 is the upper connecting rod. Detailed Implementation

[0024] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The following describes the embodiments and appendices. Figures 1-4 The technical solution of this utility model will be further described below.

[0027] Example 1

[0028] A multi-link adjustment mechanism for a seat includes: a base 1, a seat frame 2, and a backrest assembly. The backrest assembly includes a backrest link 3 and a backrest mounting rod 4, and also includes a footrest assembly and a connecting assembly that are hinged to each other.

[0029] The footrest assembly includes a footrest link 5, a rear link 6, an upper link 7, a middle link 8, a lower link 9, and a footrest 10.

[0030] The connecting assembly includes a lower connecting rod 11 and an upper connecting rod 12;

[0031] The base 1, seat frame 2, backrest assembly, and footrest assembly are hinged together by connecting components.

[0032] like Figures 1-5 As shown, this utility model can simultaneously adjust the angle and position of the backrest, seat cushion, and footrest, thereby achieving seat posture adjustment to allow the human body to reach a comfortable resting posture.

[0033] As a further preferred embodiment, the two ends of the footrest connecting rod 5 are respectively hinged to the backrest mounting rod 4 and the rear rod 6. The upper end of the rear rod 6 is hinged to the seat frame 2 and the lower end is hinged to the upper connecting rod 7. The upper end of the middle rod 8 is hinged to the bottom frame 2, and its middle and lower ends are respectively hinged to the middle part of the upper connecting rod 7 and the lower connecting rod 9. The upper end of the footrest 10 is hinged to the upper connecting rod 7 and the lower end is hinged to the lower connecting rod 9. The two ends of the lower connecting rod 9 are respectively hinged to the footrest 10 and the lower end of the middle rod 8. The upper end of the upper connecting rod 7 is hinged to the footrest 10, and its middle and lower ends are respectively hinged to the middle rod 8 and the rear rod 6.

[0034] Specifically, during use:

[0035] 1) such as Figure 1 As shown, when the seat frame is unfolded, the lower front connecting rod 11 rotates counterclockwise and moves upward, driving the upper front connecting rod 12 to move through the hinge. The upper front connecting rod 12 is hinged to the seat frame 2, causing the seat frame 2 to lift upward.

[0036] 2) Since one end of the backrest link 3 is hinged to the lower front connecting rod 11 and the upper front connecting rod 12, when the lower front connecting rod 11 rotates counterclockwise, it will drive the backrest link 3 to move forward together. The backrest link 3, through the hinge, will also drive the backrest rod 4 to rotate clockwise around the seat frame 2, causing the backrest rod 4 to tilt.

[0037] 3) The clockwise rotation of the backrest rod 4 pushes the footrest link 5 forward through the hinge, and the footrest link 5 drives the rear rod 6 to move clockwise around the seat frame 2 through the hinge.

[0038] 4) The clockwise movement of the rear lever 6 pushes the upper connecting rod 7 forward via a hinge, thereby driving the middle lever 8 to rotate clockwise. The clockwise movement of the middle lever 8 also pushes the upper connecting rod 7 and the lower connecting rod 9 forward via a hinge, thereby driving the footrest 10 to rotate clockwise to support the person's legs. Figure 2 As shown.

[0039] 5) When the seat frame is retracted, the front lower connecting rod 11 rotates clockwise and moves downward, and the above movement is reversed in a cycle.

[0040] Preferably, since the above-mentioned links are interconnected, when selecting a driving link, it is not limited to the front lower connecting rod 11 as the driving link. Other links, such as the backrest rod 4, the rear rod 6, the middle rod 8, etc., can also be used as driving links. The specific driving method will not be elaborated here.

[0041] As a further preferred embodiment, the base 1 includes a vertical beam 101 and a horizontal beam 102 fixed to each other. A first rotating seat 103 is fixedly provided on both sides of the vertical beam 101. A second rotating seat 201 and a third rotating seat 202 are fixedly provided on the upper and lower sides of the end of the seat frame 2, and a fourth rotating seat 203 is fixedly provided at the front end. The first rotating seat 103 is hinged to the third rotating seat 202, the second rotating seat 201 is hinged to the backrest mounting rod 4, and the fourth rotating seat 203 is hinged to the rear rod 6.

[0042] Specifically, such as Figure 3 As shown, the first rotating seat 103, the second rotating seat 201, the third rotating seat 202 and the fourth rotating seat 203 are fixed by bolts, which is simple in structure and convenient for assembly, disassembly and maintenance.

[0043] As a further preferred embodiment, the upper and lower ends of the seat frame 2 are respectively hinged to the backrest mounting rod 4 and the base 1, and the front upper connecting rod 12 is hinged to the front end.

[0044] As a further preferred embodiment, a rotating rod 41 is provided between the backrest mounting rods 4, and the end of the backrest connecting rod 3 is rotatably mounted on the rotating rod 41 and the front end is hinged to the connecting assembly.

[0045] As a further preferred embodiment, a drive motor 13 is provided on the side of the crossbeam 102 away from the vertical beam 101, and the output end of the drive motor 13 is connected to the lower end of the lower connecting rod 11 for transmission.

[0046] As a further preferred embodiment, the footrest 10 is provided with an installation groove 1001 to facilitate the installation of the footrest pad.

[0047] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A seat multi-link adjustment mechanism comprising: Base, seat frame and backrest assembly, the backrest assembly comprising backrest connecting rod and backrest mounting rod, characterized in further comprising mutually hinged foot support assembly and connecting assembly; The foot support assembly comprises foot support connecting rod, rear rod, upper connecting rod, middle rod, lower connecting rod and foot support; The connecting assembly comprises lower connecting rod and upper connecting rod; The base, seat frame, backrest assembly and foot support assembly are mutually hinged through the connecting assembly.

2. A multi-link seating adjustment mechanism according to claim 1, wherein, The foot support connecting rod is hinged at both ends with the backrest mounting rod and the rear rod, the upper end of the rear rod is hinged with the seat frame and the lower end is hinged with the upper connecting rod, the upper end of the middle rod is hinged with the bottom frame and the middle part and the lower end are hinged with the middle part and the lower end of the upper connecting rod respectively, the upper end of the foot support is hinged with the upper connecting rod and the lower end is hinged with the lower connecting rod, the both ends of the lower connecting rod are hinged with the foot support and the lower end of the middle rod respectively, the upper end of the upper connecting rod is hinged with the foot support and the middle part and the lower end are hinged with the middle rod and the rear rod respectively.

3. A multi-link seating adjustment mechanism according to claim 1, wherein, The base comprises mutually fixed vertical beam and horizontal beam, the both sides of the vertical beam are fixedly provided with first rotating seat, the both sides of the end of the seat frame are fixedly provided with second rotating seat, third rotating seat and the front end is fixedly provided with fourth rotating seat, the first rotating seat is hinged with the third rotating seat, the second rotating seat is hinged with the backrest mounting rod and the fourth rotating seat is hinged with the rear rod.

4. A multi-link seating adjustment mechanism according to claim 1, wherein, The both sides of the end of the seat frame are hinged with the backrest mounting rod and the base respectively and the front end is hinged with the front upper connecting rod.

5. A seat multi-link adjustment mechanism according to claim 1 or 4, characterized in that, The backrest mounting rod is provided with rotating rod, the end of the backrest connecting rod is rotatably arranged on the rotating rod and the front end is hinged with the connecting assembly.

6. A multi-link seating adjustment mechanism according to claim 3, wherein, The side of the horizontal beam away from the vertical beam is provided with driving motor, the output end of the driving motor is drivingly connected with the lower end of the lower connecting rod.

7. A multi-link seating adjustment mechanism according to claim 1, wherein, The foot support is provided with mounting groove.

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