A seat zero gravity adjustment mechanism based on angle adjuster

Abstract

The present invention discloses a zero gravity adjustment mechanism for a seat based on a recliner, comprising a base, a seat frame being arranged above the base, the rear portion of the seat frame being rotatably supported above the base, the key being that a recliner is arranged on the base, the recliner comprising a fixed portion and a rotating portion capable of rotating relative to the fixed portion, the fixed portion being connected to a fixed connecting plate, the fixed connecting plate being fixedly arranged on the base, the rotating portion being connected to a rotating connecting plate, the rotating connecting plate rotating in a vertical plane, one end of the rotating connecting plate being fixedly connected to the rotating portion, and the other end being rotatably connected to the front portion of the seat frame. Compared with the prior art, the present invention has the following beneficial effects: a modular recliner is used to replace the gear rack mechanism commonly used in previous schemes, the integration is high, the structure is simple, and adjustment mechanisms based on the recliner can be respectively arranged on both sides of the seat frame, allowing the synchronous rotation and locking of both sides to be achieved through the same electric drive device.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile seats, relates to a seat frame structure, and in particular to a seat zero-gravity adjustment mechanism based on a recliner. Background Art

[0002] Seats with functions such as backrest angle adjustment, leg rest extension length and angle adjustment, seat frame height and angle adjustment, etc., due to their rich adjustment capabilities, can meet the purpose of passengers adjusting the seat posture according to their own feelings, reduce joint tension, and greatly improve riding comfort. Such seats are called zero-gravity seats. Among them, the inclination of the seat frame has a greater impact on the force distribution of various parts of the passenger's body, and the adjustment of the inclination of the seat frame is often called zero-gravity adjustment. In the previously developed technology, the zero-gravity adjustment of the seat is generally achieved by the following structure: the rear part of the seat frame is rotatably supported above the base, and a rotation adjustment mechanism is set between the front part of the seat frame and the base. The rotation adjustment mechanism is driven by a drive motor to drive the seat frame to rotate around the rear cross bar of the seat frame, thereby achieving the adjustment of the inclination of the seat frame. In the previously developed technology, the rotation adjustment mechanism is generally based on a connecting rod mechanism, and one of the connecting rods is driven to rotate by a gear rack mechanism, or one of the connecting rods is replaced by a screw nut mechanism, and the rotation adjustment of the seat frame is achieved by changing the length of the connecting rod. The main problem with the existing technology is that the structure of the rotation adjustment mechanism is relatively complex, the number of parts is large, the requirements for processing and assembly are high, and the assembly is time-consuming. In addition, for cost and control considerations, only one drive motor was set in the early plan, and it was close to one side of the seat frame. The motor served as a retaining component to support and lock the angle of the seat frame. The seat frame on the side where the motor is located can be relatively stable, but the seat frame part far away from the motor has a relatively small range of motion, especially when the seat frame has a large inclination angle and the passenger's center of gravity is close to the rear of the seat frame. This small range of motion may affect the riding comfort. To address this problem, the existing rotation adjustment mechanism can only solve it by increasing the number of motors, but this will lead to increased costs and more complicated control. Summary of the invention

[0003] In view of this, the present invention provides a seat zero gravity adjustment mechanism based on a recliner.

[0004] The technical solution is as follows:

[0005] A seat zero gravity adjustment mechanism based on a recliner comprises a base, a seat frame is arranged above the base, and the rear part of the seat frame is rotatably supported above the base. The key point is that the base is provided with a recliner, and the recliner comprises a fixed part and a rotating part which can rotate relative to the fixed part, the fixed part is connected with a fixed connecting plate, and the fixed connecting plate is fixedly arranged on the base, the rotating part is connected with a rotating connecting plate, and the rotating connecting plate rotates in a vertical plane, and one end of the rotating connecting plate is fixedly connected to the rotating part, and the other end is rotatably connected to the front part of the seat frame.

[0006] Compared with the prior art, the present invention has the following beneficial effects: a modular angle adjuster is used to replace the gear rack mechanism commonly used in previous solutions, which has high integration and simple structure, and adjustment mechanisms based on the angle adjuster can be respectively arranged on both sides of the seat frame, allowing the synchronous rotation and locking of the two sides to be achieved through the same electric drive device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the present invention;

[0008] Figure 2 A structural schematic diagram of another perspective of the present invention;

[0009] Figure 3 This is a schematic diagram of the angle adjuster installed on the bracket on the slide rail. DETAILED DESCRIPTION

[0010] The present invention is further described below in conjunction with embodiments and drawings.

[0011] like Figures 1 to 3 As shown, a zero gravity adjustment mechanism for a seat based on a recliner includes a base, a seat frame 100 is arranged above the base, the rear part of the seat frame 100 is rotatably supported above the base, a recliner 300 is arranged on the base, the recliner 300 includes a fixed part and a rotating part that can rotate relative to the fixed part, the fixed part is connected to a fixed connecting plate, the fixed connecting plate is fixedly arranged on the base, the rotating part is connected to a rotating connecting plate 310, the rotating connecting plate 310 rotates in a vertical plane, one end of the rotating connecting plate 310 is fixedly connected to the rotating part, and the other end is rotatably connected to the front part of the seat frame 100. In this way, the front part of the seat frame 100 can be driven to rotate by the recliner 300. This adjustment mechanism can be used for adjusting the angle of the seat frame 100, and can also be used in a seat frame height adjustment structure based on a four-bar structure, so as to adjust the height of the seat frame 100.

[0012] like Figure 1 and 2As shown, the seat frame 100 includes two seat frame side panels 110 arranged opposite to each other on the left and right sides, a seat frame front transverse tube 120 is connected between the front ends of the two seat frame side panels 110, and a seat frame rear transverse tube 130 is connected between the rear ends of the two seat frame side panels 110. The seat frame rear transverse tube 130 is rotatably supported above the base to allow the seat frame 100 to rotate around the seat frame rear transverse tube 130 to achieve tilt adjustment.

[0013] The advantage of using the angle adjuster 300 as the angle adjustment mechanism is that it allows two angle adjusters 300 to be driven by one driving device. Figures 1 to 3 , one of the recliners 300 is disposed below each of the two seat frame side plates 110, and the two recliners 300 are disposed opposite to each other on the left and right sides, and the rotating connecting plates 310 of the two recliners 300 are respectively connected to the front of the seat frame side plates 110 on the same side. A recliner synchronization rod 320 is connected between the rotating parts of the two recliners 300, and the recliner synchronization rod 320 is connected to a rotation driving device. In this way, the recliners 300 on both sides of the front of the seat frame 100 can be driven to rotate and remain locked by the same rotation driving device, which has the advantages of being able to maintain the synchronization and balance of the two sides of the front of the seat frame 100 when adjusting the inclination of the seat frame 100, and being able to make both sides of the seat frame 100 bear the load equally when the inclination of the seat frame 100 is locked, thereby improving the stability of the seat frame 100 and preventing the small shaking of one side of the front of the seat frame 100 that may occur in the existing seat under certain stress conditions.

[0014] When used for zero gravity adjustment of the seat frame 100, a tilt adjustment link 400 is connected between the rotating end of the rotating link plate 310 and the seat frame side plate 110 on the same side, one end of the tilt adjustment link 400 is hinged to the rotating link plate 310, and the other end is hinged to the front of the seat frame side plate 110, forming a mechanism similar to a double link, thereby achieving tilt adjustment of the seat frame 100. In order to further improve the synchronization of the two sides of the seat frame 100 when adjusting the tilt angle, a link synchronization rod 410 is connected between the two tilt adjustment links 400.

[0015] The base includes two groups of slide rail assemblies 500, and the two groups of slide rail assemblies 500 are arranged parallel to the seat frame side panels 110. The two groups of slide rail assemblies 500 are opposite to each other on the left and right. A synchronous sliding assembly is connected between the upper slide rails of the two groups of slide rail assemblies 500, and slide rail upper brackets 200 are respectively arranged on the two groups of slide rail assemblies 500.

[0016] The upper bracket 200 of the slide rail is arranged along the front-back direction, and the two upper brackets 200 of the slide rail are opposite to each other. The upper bracket 200 of the slide rail is made of a sheet metal, including a horizontal plate 210 and a vertical plate 220, wherein the horizontal plate 210 falls on the upper slide rail of the corresponding slide rail assembly 500 and is fixedly connected thereto, and the vertical plate 220 is located in the vertical plane. A part of the vertical plate 220 is recessed to one side to form a recliner installation area, and the recliner installation area is located at the front of the vertical plate 220. The recliner 300 is arranged in the recliner installation area. The vertical plate 220 where the recliner installation area is located forms the fixed connecting plate, and the rotating connecting plate 310 is located at the opening side of the recliner installation area. In this embodiment, the vertical plate 220 is recessed toward the inner side of the seat frame side plate 110, and the recliner 300 is located outside the vertical plate 220, and the outer shell of the recliner 300 is welded to the vertical plate 220. The purpose of setting the recliner installation area is: on the one hand, to increase the local strength of the vertical plate 220; on the other hand, to hide the recliner 300 to prevent external objects from falling into the recliner and interfering with its operation; in addition, the rotating connecting plate 310 is brought close to the vertical plate 220 to reduce the axial instability of the recliner 300 when the rotating connecting plate 310 rotates.

[0017] like Figure 3 , a lower support platform 230 and an upper stop point 240 are respectively provided on the base corresponding to each of the rotating link plates 310. Among them, a flange is connected to the upper edge of the vertical plate 220, and the flange extends toward the corresponding opening side of the angle adjuster installation area, and the front end of the flange forms the upper stop point 240 corresponding to the rotating link plate 310. The horizontal plate 210 below the middle of the rotating link plate 310 partially protrudes upward to form a lower support platform 230, and the lower support platform 230 is connected to the vertical plate 220. The lower support platform 230 and the upper stop point 240 define the rotation area of ​​the rotating link plate 310.

[0018] The inner wall of the center hole of the rotating part has an inner spline, and the outer wall of the recliner synchronization rod 320 has an outer spline. The two ends of the recliner synchronization rod 320 are respectively inserted into the corresponding center hole of the rotating part. A clearance hole is opened in the recliner installation area corresponding to the center hole of the rotating part for the recliner synchronization rod 320 to pass through.

[0019] The rotation drive device is provided near any one of the vertical plates 220. The rotation drive device may be a reduction motor, which is used to drive the angle adjuster synchronization rod 320 to rotate. The housing of the reduction motor is fixedly connected to the vertical plate 220. The reduction motor may be a motor used in the electric angle adjuster adjustment device disclosed in patent document CN202827204U.

[0020] Under the condition of meeting the use requirements and ensuring the strength, an eccentric angle adjuster or a concentric angle adjuster can be used. Generally speaking, the torque of an eccentric angle adjuster is larger than that of a concentric angle adjuster, so the angle adjuster 300 in this embodiment is preferably an eccentric angle adjuster.

[0021] In this embodiment, the two ends of the rear transverse tube 130 of the seat frame are respectively connected to the rear ends of the vertical plates 220 on both sides with a height adjustment link 600, thereby forming a multi-link mechanism with the angle adjuster 300 and the tilt adjustment link 400 at the front of the seat frame 100. Any of the height adjustment links 600 is connected to a rotation drive mechanism for driving the height adjustment link 600 to rotate or keep it locked. The rotation drive mechanism and the front rotation drive device work independently, so that the seat frame 100 can achieve both tilt adjustment and height adjustment.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A seat zero gravity adjustment mechanism based on a recliner, comprising a base, a seat frame (100) being arranged above the base, the rear portion of the seat frame (100) being rotatably supported above the base, characterized in that: The base is provided with an angle adjuster (300), the angle adjuster (300) comprising a fixed portion and a rotating portion capable of rotating relative to the fixed portion, the fixed portion being connected to a fixed connecting plate, the fixed connecting plate being fixedly arranged on the base, the rotating portion being connected to a rotating connecting plate (310), the rotating connecting plate (310) rotating in a vertical plane, one end of the rotating connecting plate (310) being fixedly connected to the rotating portion, and the other end being rotatably connected to the front portion of the seat frame (100); The seat frame (100) comprises two seat frame side plates (110) arranged opposite to each other on the left and right sides, a seat frame front transverse tube (120) is connected between the front ends of the two seat frame side plates (110), and a seat frame rear transverse tube (130) is connected between the rear ends of the two seat frame side plates (110); A recliner (300) is disposed below each of the two seat frame side plates (110), the two recliners (300) are disposed opposite to each other on the left and right, and the rotating connecting plates (310) of the two recliners (300) are respectively connected to the front of the seat frame side plates (110) on the same side; A recliner synchronization rod (320) is connected between the rotating parts of the two recliners (300), and the recliner synchronization rod (320) is connected to a rotation driving device; An inclination adjustment link (400) is connected between the rotating end of the rotating link plate (310) and the seat frame side plate (110) on the same side, one end of the inclination adjustment link (400) is hinged to the rotating link plate (310), and the other end is hinged to the front part of the seat frame side plate (110); A lower support platform (230) and an upper dead point (240) are respectively provided on the base corresponding to each of the rotating link plates (310), and the lower support platform (230) and the upper dead point (240) define a rotation area of ​​the rotating link plate (310); The base comprises two slide rail upper brackets (200), the slide rail upper brackets (200) are arranged along the front-back direction, and the two slide rail upper brackets (200) are opposite to each other left and right; The slide rail upper bracket (200) is made of a sheet metal plate, and comprises a horizontal plate (210) and a vertical plate (220), wherein the vertical plate (220) is located in the vertical plane; A portion of the vertical plate (220) is recessed toward one side to form a recliner installation area, the recliner installation area is located at the front of the vertical plate (220), the recliner (300) is arranged in the recliner installation area, the vertical plate (220) where the recliner installation area is located forms the fixed connecting plate, and the rotating connecting plate (310) is located at the opening side of the recliner installation area; The inner wall of the central hole of the rotating part has an inner spline, the outer wall of the angle adjuster synchronization rod (320) has an outer spline, and the two ends of the angle adjuster synchronization rod (320) are respectively inserted into the corresponding central hole of the rotating part.

2. A seat zero gravity adjustment mechanism based on a recliner according to claim 1, characterized in that: A connecting rod synchronization rod (410) is connected between the two inclination angle adjustment connecting rods (400).

3. The seat zero gravity adjustment mechanism based on a recliner according to claim 1, characterized in that: The horizontal plate (210) below the middle of the rotating link plate (310) is partially raised upward to form the lower support platform (230), and the lower support platform (230) is connected to the vertical plate (220); The upper edge of the vertical plate (220) is connected to a flange, the flange protruding toward the corresponding opening side of the angle adjuster installation area, and the front end of the flange forms the upper dead point (240) corresponding to the rotating link plate (310).

4. The seat zero gravity adjustment mechanism based on a recliner according to claim 3, characterized in that: The base further comprises two groups of slide rail assemblies (500), the two groups of slide rail assemblies (500) are arranged parallel to the seat frame side plates (110), the two groups of slide rail assemblies (500) are opposite to each other, a synchronous sliding assembly is connected between the two groups of slide rail assemblies (500), and the two groups of slide rail assemblies (500) are respectively provided with the slide rail upper brackets (200), and the horizontal plates (210) of the slide rail upper brackets (200) fall on the corresponding slide rail assemblies (500) and are fixedly connected thereto.

5. The seat zero gravity adjustment mechanism based on a recliner according to claim 1, characterized in that: The rotation driving device is arranged near any one of the vertical plates (220); The rotation driving device is a reduction motor, and the reduction motor is used to drive the angle adjuster synchronization rod (320) to rotate; The housing of the reduction motor is fixedly connected to the vertical plate (220).

Images