Automobile seat framework and automobile seat

Abstract

This invention provides a car seat frame and a car seat. The seat frame is a connected structure of a seat basin frame and a backrest frame. The backrest frame is electrically adjustable with stepless adjustment, while the seat basin frame is manually adjustable with a large travel range. Armrests for passengers can be installed on both sides of the seat back. After being unlocked via an unlocking mechanism, the backrest can quickly flip forward around its center of rotation, simultaneously unlocking the locking and limiting mechanisms of the seat basin frame. This allows the entire frame to move forward, and the forward adjustment range exceeds the normal adjustment range of the seat basin frame. Activating this function provides more space for passengers to get in and out of the rear of the seat. Furthermore, this backrest frame structure can be matched with headrests of various performance levels. When adjusting the angle of the backrest and using the convenient entry and exit functions, it can also cause the seat basin frame to tilt at a certain angle. This significantly improves riding comfort and solves the problem of difficulty for rear passengers to get in and out of the car.

Description

Technical Field

[0001] This invention relates to the automotive field, specifically to an automotive seat frame and an automotive seat. Background Technology

[0002] The automotive seat frame is a crucial connection between the occupants and the vehicle. A well-designed ergonomic frame layout is fundamental to the development of the seat assembly and other interior components. Simultaneously, the seat frame is a vital component for occupant safety, undertaking the primary functions of energy absorption and load-bearing. The design of the frame's structure determines the seat's functionality and comfort. Currently, automotive rear seat structures come in various forms, including simple panel structures and multi-functional complex frame structures. Simple panel structures can be customized to achieve a 40:60 split-backrest or a 100% integral frame structure, depending on usage requirements. This type of frame structure is simple and allows for backrest folding, typically connected to the body-in-white assembly via seatback locks. Folding down the backrest increases cargo space. Multi-functional complex frame structures can achieve seat fore-aft adjustment, seat height adjustment, and backrest angle adjustment, depending on vehicle positioning, vehicle environment, and usage needs. Multi-functional complex seat frames are typically fixed to the body-in-white with four bolts. However, none of these frames provide adequate entry and exit space for occupants behind the seat, resulting in less flexible and convenient entry and exit.

[0003] In view of the above problems, the inventors of this invention have finally obtained this invention after a long period of research and practice. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a car seat frame and a car seat. After the backrest frame of the seat frame is unlocked by the unlocking mechanism, it can quickly flip forward around the rotation center and simultaneously unlock the locking mechanism and limiting mechanism of the seat frame, so that the entire frame can move forward. Moreover, the forward adjustment range exceeds the adjustment range of the seat frame during normal use. By activating this function, more space for getting in and out of the car can be provided behind the seat, which can solve the problem of difficulty for passengers in the back row of the seat to get in and out of the car.

[0005] The technical solution adopted in this invention is as follows:

[0006] In one aspect, the present invention provides an automobile seat frame, including a backrest frame, a seat basin frame, and a seat slide rail. The backrest frame is connected to the seat basin frame, and the seat slide rail includes an upper seat slide rail and a lower seat slide rail that are slidably engaged. The lower seat slide rail is fixedly connected to the vehicle floor, and the upper seat slide rail is fixedly connected to the seat basin frame.

[0007] The car seat frame also includes an adjustment handle and a seat overtravel unlocking unit.

[0008] The adjustment handle is mounted on the backrest frame, and the seat overtravel unlocking unit is mounted on the seat basin frame or the seat upper slide rail. The seat overtravel unlocking unit includes a limit stop. The adjustment handle is connected to the seat overtravel unlocking unit through an unlocking cable and can control the seat overtravel unlocking unit to switch between locked and unlocked states.

[0009] The lower slide rail of the seat is provided with a first limiting part and a second limiting part, and the upper slide rail of the seat is provided with an overtravel limiting part;

[0010] When the seat overtravel unlocking unit is in the locked state, at the limit position of the upper seat slide rail relative to the lower seat slide rail in the first direction, the limiting block interferes with the first limiting part, thereby limiting the first limit travel distance of the upper seat slide rail in the first direction;

[0011] When the seat overtravel unlocking unit is in the unlocked state, the limiting block and the first limiting part will not interfere with each other. At the limit position of the upper slide rail relative to the lower slide rail in the first direction, the overtravel limiting part and the second limiting part interfere with each other, thereby limiting the second limit travel distance of the upper slide rail in the first direction. The second limit travel distance is greater than the first limit travel distance.

[0012] Furthermore, the car seat frame also includes a connecting plate, an adjuster assembly, and a backrest unlocking unit;

[0013] The backrest unlocking unit is connected to the backrest frame. One end of the connecting plate is fixedly connected to the seat frame, and the other end is connected to the angle adjuster assembly. The backrest unlocking unit is connected to the adjustment handle via an unlocking cable. The adjustment handle can control the backrest unlocking unit to switch between the locked and unlocked states.

[0014] The backrest unlocking unit is connected to the angle adjuster assembly in the locked state, so that the angle of the backrest frame relative to the seat frame can be adjusted through the angle adjuster assembly.

[0015] When the backrest unlocking unit is in the unlocked state, it separates from the angle adjuster assembly, allowing the backrest frame to be freed from the angle restriction imposed by the angle adjuster assembly.

[0016] Furthermore, the car seat frame also includes a follow-up handle, which is connected to the seat overtravel unlocking unit via an unlocking cable;

[0017] The backrest unlocking unit is connected to the follow-up handle in the unlocked state. When the backrest frame rotates counterclockwise, the backrest unlocking unit drives the follow-up handle to move. When the backrest frame rotates counterclockwise to a preset angle, the seat overtravel unlocking unit is in the unlocked state.

[0018] When the backrest unlocking unit is in the locked state, it is separated from the follow-up handle, and the seat overtravel unlocking unit is in the locked state.

[0019] Furthermore, the car seat frame also includes a seat unlocking unit and a fore-and-aft adjustment handle, the fore-and-aft adjustment handle being connected to the seat unlocking unit and capable of controlling the seat unlocking unit to switch between a locked state and an unlocked state;

[0020] When the seat unlocking unit is in the locked state, the position between the upper seat slide rail and the lower seat slide rail is fixed; when the seat unlocking unit is in the unlocked state, the position between the upper seat slide rail and the lower seat slide rail is adjustable.

[0021] Furthermore, the seat overtravel unlocking unit and the seat unlocking unit are connected by a linkage mechanism. When the seat overtravel unlocking unit is in the unlocked state, the seat unlocking unit is simultaneously in the unlocked state through the linkage mechanism.

[0022] Furthermore, a backrest adjustment motor is fixedly installed on the backrest frame, and the output shaft of the backrest adjustment motor is connected to the angle adjuster assembly, thereby controlling the angle adjustment of the angle adjuster assembly.

[0023] Furthermore, the angle adjuster assembly includes a left angle adjuster assembly and a right angle adjuster assembly, with a left and right synchronizing rod axially connected in series with the backrest adjustment motor, the left angle adjuster assembly, and the right angle adjuster assembly.

[0024] Furthermore, the seat frame includes a seat surface, a left side plate of the seat, a right side plate of the seat, a longitudinal beam connecting the left seat, a longitudinal beam connecting the right seat, a left front rotating support arm, and a right front rotating support arm.

[0025] The backrest frame includes a left side panel, a right side panel, a left armrest bracket, and a right armrest bracket;

[0026] The left and right side panels of the seat basin are fixedly connected to the upper slide rail of the seat. The lower ends of the left and right front rotating support arms are respectively hinged to the left and right side panels of the seat basin. The upper ends of the left and right front rotating support arms are respectively hinged to the front ends of the upper connecting beam of the left and right seat basins. The seat basin surface is connected to the upper connecting beam of the left and right seat basins.

[0027] The left armrest bracket and the right armrest bracket are respectively fixed to the left side panel and the right side panel of the backrest. The rear ends of the longitudinal beam connecting the left seat basin and the longitudinal beam connecting the right seat basin are respectively hinged to the left armrest bracket and the right armrest bracket.

[0028] Furthermore, the seat frame also includes a seat spring, a left connecting plate of the front horizontal tube, a right connecting plate of the front horizontal tube, a front horizontal tube, and a rear horizontal tube;

[0029] The two ends of the front horizontal tube are respectively fixed to the front ends of the left front rotating support arm and the right front rotating support arm. The two ends of the rear horizontal tube are respectively fixed to the rear ends of the left front rotating support arm and the right front rotating support arm. The left and right ends of the front horizontal tube are respectively hinged to the left side connecting plate and the right side connecting plate. The front end of the seat basin is fixed to the left side connecting plate and the right side connecting plate of the front horizontal tube. The rear ends of the seat basin are respectively hinged to the left side connecting beam and the right side connecting beam of the seat basin. The front end of the seat spring is connected to the rear end of the seat basin, and the rear end of the seat spring is connected to the rear horizontal tube.

[0030] Furthermore, the backrest frame also includes a left armrest mounting shaft and a right armrest mounting shaft for mounting occupant armrests; one end of the left armrest mounting shaft is fixedly connected to the upper end of the left armrest bracket, and one end of the right armrest mounting shaft is fixedly connected to the upper end of the right armrest bracket.

[0031] Furthermore, the car seat frame is equipped with an ISOFIX anchor point system and an upper tether anchor point for installing child seats.

[0032] Furthermore, the backrest frame includes a left backrest side panel, a right backrest side panel, an upper backrest crossbeam, a middle safety crossbeam, and a lower backrest crossbeam; the left and right ends of the upper backrest crossbeam are fixedly connected to the upper parts of the left and right backrest side panels, respectively; the left and right ends of the middle safety crossbeam are fixedly connected to the upper middle parts of the left and right backrest side panels, respectively; and the left and right ends of the lower backrest crossbeam are fixedly connected to the lower parts of the left and right backrest side panels, respectively; the adjustment handle is mounted on the upper backrest crossbeam.

[0033] Furthermore, a headrest support structure is provided on the crossbeam of the backrest for installing various functional headrests.

[0034] In another aspect, the present invention provides an automobile seat that employs the aforementioned seat back frame.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] The seat frame of this invention is a connected structure of a seat basin frame and a backrest frame. The backrest is electrically adjustable with stepless adjustment, while the seat basin frame is manually adjustable with a large travel range. The backrest has armrest mounting brackets, and armrests for passengers can be installed on both sides. After being unlocked via an unlocking mechanism, the backrest can quickly flip forward around its rotation center, simultaneously unlocking the locking and limiting mechanisms of the seat basin frame, allowing the entire frame to move forward. The forward adjustment range exceeds the normal adjustment range of the seat basin frame, providing more space for passengers to get in and out of the rear of the seat. Furthermore, the backrest frame structure has a well-designed headrest mounting interface, compatible with headrests of various performance levels. The backrest can also tilt the seat basin frame to a certain angle for angle adjustment and ease of entry and exit. This structural frame design significantly improves passenger comfort and solves the problem of difficulty for rear passengers to get in and out of the vehicle. The symmetrical seat frame can be installed on a symmetrical side of the vehicle body, allowing for independent control of the left and right seats. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 A schematic diagram of the backrest frame and its electrically stepless adjustment structure according to an embodiment of the present invention is shown.

[0039] Figure 2 A schematic diagram of the backrest frame and its armrest mounting structure according to an embodiment of the present invention is shown.

[0040] Figure 3 A schematic diagram of the structure of the basin frame according to an embodiment of the present invention is shown;

[0041] Figure 4 A schematic diagram of an embodiment of the present invention is shown, in which the basin frame has been removed from the basin surface structure.

[0042] Figure 5 A schematic diagram of an embodiment of the present invention, showing the car seat frame and its convenient adjustment and unlocking structure for getting in and out of the vehicle;

[0043] Figure 6 A schematic diagram illustrating the unlocking principle of the seat overtravel unlocking unit of an automobile seat frame according to an embodiment of the present invention is shown.

[0044] Figure 7A schematic diagram illustrating the unlocking principle of the left backrest unlocking unit of an automobile seat frame according to an embodiment of the present invention is shown.

[0045] Figure 8 A schematic diagram of an automotive seat frame and its fore-and-aft adjustment and unlocking structure according to an embodiment of the present invention is shown.

[0046] Figure label:

[0047] 1- Upper crossbeam of the backrest, 2- Middle safety crossbeam

[0048] 3-Left side panel of the backrest; 4-Backrest adjustment motor.

[0049] 5-Left angle adjuster assembly, 6-Left side connecting plate,

[0050] 7 - Left and right synchronization rods; 8 - Lower crossbeam of the backrest.

[0051] 9-Right side connecting plate, 10-Right angle adjuster assembly,

[0052] 11-Right side panel of the backrest; 12-Mounting shaft for the left armrest.

[0053] 13-Left armrest support, 14-Right armrest support

[0054] 15-Right handrail mounting shaft; 16-Left side plastic clip.

[0055] 17 - Seat spring; 18 - Left side bolt;

[0056] 19 - Sink basin surface; 20 - Right side bolt.

[0057] 21-Right side plastic card, 22-Right side ISOFIX hook,

[0058] 23 - Rear reinforcing plate; 24 - Left side ISOFIX hook;

[0059] 25 - Seat with connecting nut; 26 - Left side plate of the basin.

[0060] 27 - Left side seat rail; 28 - Left side seat basin connecting longitudinal beam;

[0061] 29 - Left front rotating support arm; 30 - Left connecting plate of the front cross tube;

[0062] 31-Front cross tube, 32-Right seat rail,

[0063] 33-Sleeve, 34-Right front swivel support arm,

[0064] 35 - Right connecting plate of the front horizontal tube; 36 - Upper connecting longitudinal beam of the right side seat basin;

[0065] 37 - Right side panel of the basin; 38 - Adjustment handle;

[0066] 39 - Mounting base; 40 - Upper unlocking cable;

[0067] 41-Left side unlock handle, 42-Left side backrest unlock unit,

[0068] 43- Follow-up handle, 44- Lower unlocking cable,

[0069] 45- Seat overtravel unlocking unit, 451- Limit stop,

[0070] 46 - Slide rail unlock handle; 47 - Right side backrest unlock unit;

[0071] 48-Right side unlock handle, 49-Front and rear adjustment handle,

[0072] 50 - Mounting shaft, 51 - Adjusting lifting arm,

[0073] 52 - Right side bracket, 53 - Left side bracket,

[0074] 54- Seat upper slide rail, 541- Overtravel limit unit,

[0075] 55-Seat lower rail, 551-First limiting part,

[0076] 552 - Second limiting part. Detailed Implementation

[0077] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0078] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation of the person in the seat. For example, the left side of the car seat frame is the left-hand direction of the person in the seat, and the right side of the car seat frame is the right-hand direction of the person in the seat. These terms are used only for the convenience of describing this invention and are not intended to 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 limiting this invention.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, unless otherwise explicitly specified.

[0080] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0082] refer to Figures 1 to 8 The seat frame provided in this embodiment of the invention includes a backrest frame, a seat basin frame, and a seat slide rail.

[0083] The backrest frame includes a left side panel 3, a right side panel 11, an upper backrest beam 1, a middle safety beam 2, a lower backrest beam 8, a backrest adjustment motor 4, left and right synchronization rods 7, a left backrest unlocking unit (CF-Box) 42, a right backrest unlocking unit (CF-Box) 47, a left angle adjuster assembly 5, a left bracket 52, a right bracket 53, a left unlocking handle 41, a right unlocking handle 48, a right angle adjuster assembly 10, a left armrest bracket 13, a left armrest mounting shaft 12, a right armrest bracket 14, and a right armrest mounting shaft 15. The left and right ends of the upper backrest beam 1 are welded to the upper edges of the left side panel 3 and the right side panel 11, respectively. The left and right ends of the middle safety beam 2 are welded to the upper middle parts of the left side panel 3 and the right side panel 11, respectively. The left and right ends of the lower backrest beam 8 are welded to the lower edges of the left side panel 3 and the right side panel 11, respectively. The left unlocking handle 41 is mounted on the left side panel 3 of the backrest together with the left backrest unlocking unit 42 via a shaft, and the right unlocking handle 48 is mounted on the right side panel 11 of the backrest together with the right backrest unlocking unit 47 via a shaft. The left bracket 52 is welded to the left side panel 3 of the backrest, and the right bracket 53 is welded to the right side panel 11 of the backrest. The backrest adjustment motor 4 is bolted to the left bracket 52, and the left and right synchronous rods 7 are axially connected in series with the backrest adjustment motor 4, the left angle adjuster assembly 5, and the right angle adjuster assembly 10. The backrest frame is provided with a left connecting plate 6 and a right connecting plate 9, and welding nuts are provided at corresponding positions of the seat frame and the backrest frame. The backrest frame and the seat frame are fixedly connected by the left and right connecting plates 6 and 9 and bolts.

[0084] The seat frame includes a seat surface 19, a left side plate 26, a right side plate 37, a seat spring 17, a left upper connecting beam 28, a right upper connecting beam 36, a seat overtravel unlocking unit 45, a fore-and-aft adjustment handle 49, a handle mounting bracket, a left front rotating support arm 29, a right front rotating support arm 34, an adjustment lifting arm 51, a slide rail unlocking handle 46, a left connecting plate 30 for the front cross tube, a right connecting plate 35 for the front cross tube, a front cross tube 31, and a rear cross tube. The front section of the seat surface 19 is connected to the left connecting plate 30 and the right connecting plate 35 of the front cross tube 31 via a left bolt 18 and a right bolt 20. The rear end of the seat surface 19 is fixed to the pivot on the left upper connecting beam 28 and the right upper connecting beam 36 via a left plastic clip 16 and a right plastic clip 21. The pivot is welded and fixedly connected to the left and right upper connecting beams 28 and 36. The left front rotating support arm 29 is connected to the left seat basin connecting longitudinal beam 28 via a bushing, and the right front rotating support arm 34 is connected to the right seat basin connecting longitudinal beam 36 via a bushing 33. The rear ends of the left and right seat basin connecting longitudinal beams 28 and 36 are respectively connected to the lower ends of the backrest frame armrest bracket via bushings. The front end of the seat basin spring 17 is hooked to the rear end of the seat basin surface 19, and the rear end of the seat basin spring 17 is hooked to the rear cross tube. The left and right ends of the rear cross tube are welded to the left and right seat basin connecting longitudinal beams 28 and 36, respectively. The lower end of the left front rotating support arm 29 is connected to the left side plate 26 of the seat basin via a bushing, and the lower end of the right front rotating support arm 34 is connected to the right side plate 37 of the seat basin via a bushing. The left side plate 26 of the seat basin is bolted to the left seat slide rail 27, and the right side plate 37 of the seat basin is bolted to the right seat slide rail 32. A rear reinforcing plate 23 is connected between the rear ends of the left side plate 26 and the right side plate 37 of the basin via a seat-supporting connecting nut 25. The rear reinforcing plate 23 is equipped with a left ISOFIX hook 24 and a right ISOFIX hook 22.

[0085] Preferably, the bottoms of the left seat rail 27 and the right seat rail 32 are on the same horizontal plane. The left seat rail 27 is connected to the fixing holes at corresponding positions on the body-in-white; the right seat rail 32 is also connected to the fixing holes at corresponding positions on the body-in-white. The backrest frame and the seat frame are both thin-plate stamping splicing structures, which have the advantage of high strength. The upper crossbeam 1 of the backrest is equipped with a headrest bracket structure, which can install various functional headrests. After the seat frame is symmetrical, it can be installed on the symmetrical side of the vehicle body to meet the needs of passengers on the other side. The seat frame is equipped with an ISOFIX fixing point system and an upper strap fixing point for installing child seats.

[0086] like Figure 1As shown, a backrest adjustment motor 4 is provided on the backrest frame. The backrest adjustment motor 4 drives the left and right synchronous rods 7 to rotate. Under the rotational movement of the left and right synchronous rods 7, the left and right angle adjustment assemblies 5 and 10 and the connection parts with the backrest and the connection parts with the seat basin achieve relative eccentric movement. The backrest frame rotates with the eccentric movement of the left and right angle adjustment assemblies 5 and 10, so that the backrest frame can achieve electric stepless adjustment.

[0087] like Figure 2 As shown, the backrest frame includes a left armrest bracket 13, a right armrest bracket 14, a left armrest mounting shaft 12, and a right armrest mounting shaft 15. The front end of the left armrest bracket 13 is welded to the front of the left backrest side panel 3, and the rear end of the left armrest bracket 13 is welded to the rear of the left backrest side panel 3. One end of the armrest mounting shaft 12 is welded to the upper end of the left armrest mounting bracket 13. The front end of the right armrest bracket 14 is welded to the front of the right backrest side panel 11, and the rear end of the right armrest bracket 14 is welded to the rear of the right backrest side panel 11. One end of the armrest mounting shaft 15 is welded to the upper end of the right armrest mounting bracket 14.

[0088] like Figure 3 , Figure 4 As shown, when adjusting the angle of the backrest frame and using the convenient getting on and off function, the lower ends of the left armrest bracket 13 and the right armrest bracket 14 can drive the connecting longitudinal beam 28 on the left seat basin and the connecting longitudinal beam 36 on the right seat basin to move within a certain range of angles, thereby realizing the angle adjustment of the seat basin surface 19. Through the design of the angle relationship between the backrest and the seat basin surface 19, the riding comfort is greatly improved.

[0089] In one specific embodiment, such as Figure 5As shown, the front end of the adjustment handle 38 is connected to the upper crossbeam 1 of the backrest via a snap-fit, and the rear end is connected to the upper crossbeam 1 of the backrest via a rivet. The upper end of the upper unlocking cable 40 is hooked to the adjustment handle 38, and the lower end of the outer shell of the upper unlocking cable 40 is snapped to the left bracket 53 and the right bracket 52 respectively. The left unlocking handle 41 is snapped to the lower end of the left inner core of the upper unlocking cable 40, and the right unlocking handle 48 is snapped to the lower end of the right inner core of the upper unlocking cable 40. When the adjustment handle 38 is lifted upward, it pulls the inner core of the upper unlocking cable 40 upward, and the lower end of the upper unlocking cable 40 pulls the left unlocking handle 41 and the right unlocking handle 48. The left and right unlocking handles 41 and 48 respectively drive their respective rotating shafts to rotate, and the rotating shafts respectively drive the left and right backrest unlocking units (CF-Box) 42 and 47 to unlock the backrest, realizing the forward rotation of the seat backrest. The follow-up handle 43 on the backrest rotates backward and pulls the lower unlocking cable 44 built into the seat basin. The lower unlocking cable 44 pulls the seat overtravel unlocking unit 45 backward. The limit block 451 on the seat overtravel unlocking unit 45 rotates relative to each other, increasing the slide rail adjustment travel. At the same time, the seat overtravel unlocking unit 45 drives the slide rail unlocking handle 46 to unlock the slide rail lock, realizing a larger range of forward and backward adjustment of the seat frame.

[0090] like Figure 6As shown, in one embodiment, the seat rail includes a slidingly engaged upper seat rail 54 and a lower seat rail 55. The lower seat rail 55 is fixedly connected to the vehicle floor, and the upper seat rail 54 is fixedly connected to the seat frame. A seat overtravel unlocking unit 45 is mounted on the seat frame or the upper seat rail 54. The seat overtravel unlocking unit 45 includes a limiting block 451. An adjusting handle 38 is connected to the seat overtravel unlocking unit 45 via an unlocking cable and can control the seat overtravel unlocking unit 45 to switch between a locked state and an unlocked state. The lower seat rail 55 is provided with a first limiting part 551 and a second limiting part 552, and the upper seat rail 54 is provided with an overtravel limiting part 541. When the seat overtravel unlocking unit 45 is in the locked state, at the extreme position where the upper seat rail 54 slides relative to the lower seat rail 55 in the first direction (forward), the limiting block 451 interferes with the first limiting part 551, thereby limiting the first extreme travel distance of the upper seat rail 54 in the first direction. When the seat overtravel unlocking unit 45 is in the unlocked state, the limiting block 451 and the first limiting part 551 will not interfere with each other. At the limit position of the upper seat slide rail 54 relative to the lower seat slide rail 55 in the first direction, the overtravel limiting part 541 and the second limiting part 552 interfere with each other, thereby limiting the second limit travel distance of the upper seat slide rail 54 in the first direction. The second limit travel distance is greater than the first limit travel distance. The overtravel unlocking enables the entire frame to move forward, and the range of forward adjustment (second limit travel distance) exceeds the adjustment range of the seat frame during normal use (first limit travel distance). Activating this function can provide more space for getting in and out of the seat.

[0091] like Figure 5 , Figure 8 As shown, the fore-and-aft adjustment handle 49 is connected to the seat unlocking unit and can control the seat unlocking unit to switch between locked and unlocked states. When the seat unlocking unit is locked, the position between the upper and lower seat rails is fixed; when the seat unlocking unit is unlocked, the position between the upper and lower seat rails is adjustable. The seat frame contains the fore-and-aft adjustment handle 49. Lifting the fore-and-aft adjustment handle 49 causes it to rotate around the mounting shaft 50 on the handle mounting bracket, moving the adjustment lifting arm 51 upwards. The front end of the slide rail unlocking handle 46 moves upwards and rotates around the shaft. The rear end of the fore-and-aft adjustment handle 49 presses against the seat unlocking unit to unlock it, allowing the seat frame to adjust forward and backward. The seat overtravel unlocking unit 45 is connected to the seat unlocking unit via the slide rail unlocking handle 46 and the adjustment lifting arm 51. When the seat overtravel unlocking unit is unlocked, the front end of the slide rail unlocking handle 46 moves upwards, moving the adjustment lifting arm 51 upwards, simultaneously unlocking the seat unlocking unit.

[0092] like Figure 5 , Figure 7 As shown, the left backrest unlocking unit 42 and the right backrest unlocking unit 47 are connected to the backrest frame. One end of the left connecting plate 6 and the right connecting plate 9 is fixedly connected to the seat frame, and the other end is connected to the left angle adjuster assembly 5 and the right angle adjuster assembly 10, respectively. The left unlocking handle 41 and the right unlocking handle 48 control the unlocking and locking of the left backrest unlocking unit 42 and the right backrest unlocking unit 47, respectively. The left unlocking handle 41 and the right unlocking handle 48 are connected to the adjusting handle 38 via the upper unlocking cable 40. The adjusting handle 38 can control the left backrest unlocking unit 42 and the right backrest unlocking unit 47 to switch between the locked and unlocked states. In the locked state, the backrest unlocking unit is connected to the angle adjuster assembly, thereby allowing the angle of the backrest frame relative to the seat frame to be adjusted through the angle adjuster assembly. In the unlocked state, the backrest unlocking unit is separated from the angle adjuster assembly, allowing the backrest frame to be freed from the angle restriction imposed by the angle adjuster assembly. The follow-up handle 43 is connected to the seat overtravel unlocking unit 45 via the lower unlocking cable 44. When the backrest unlocking unit is in the unlocked state, it is connected to the follow-up handle. As the backrest frame rotates counterclockwise, the backrest unlocking unit drives the follow-up handle. When the backrest frame rotates counterclockwise to a preset angle, the seat overtravel unlocking unit is in the unlocked state. When the backrest unlocking unit is in the locked state, it is separated from the follow-up handle, and the seat overtravel unlocking unit is in the locked state.

[0093] This invention also provides a car seat including the car seat frame described in the above embodiments. The functions and beneficial effects of the car seat provided by this invention are the same as those of the seat frame provided by the above technical solutions, and will not be repeated here.

[0094] The above are merely preferred embodiments of the present invention and are illustrative rather than restrictive. The structure and connection methods of the components in the present invention can be varied, and any equivalent transformations and improvements made based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A car seat frame, comprising a backrest frame, a seat basin frame, and a seat slide rail, wherein the backrest frame is connected to the seat basin frame, and the seat slide rail comprises an upper seat slide rail and a lower seat slide rail that are slidably engaged, wherein the lower seat slide rail is fixedly connected to the vehicle floor, and the upper seat slide rail is fixedly connected to the seat basin frame; Its features are, The car seat frame also includes an adjustment handle and a seat overtravel unlocking unit. The adjustment handle is mounted on the backrest frame, and the seat overtravel unlocking unit is mounted on the seat basin frame or the seat upper slide rail. The seat overtravel unlocking unit includes a limit stop. The adjustment handle is connected to the seat overtravel unlocking unit through an unlocking cable and can control the seat overtravel unlocking unit to switch between locked and unlocked states. The lower slide rail of the seat is provided with a first limiting part and a second limiting part, and the upper slide rail of the seat is provided with an overtravel limiting part; When the seat overtravel unlocking unit is in the locked state, at the limit position of the upper seat slide rail relative to the lower seat slide rail in the first direction, the limiting block interferes with the first limiting part, thereby limiting the first limit travel distance of the upper seat slide rail in the first direction; When the seat overtravel unlocking unit is in the unlocked state, the limiting block and the first limiting part will not interfere with each other. At the limit position of the upper slide rail relative to the lower slide rail in the first direction, the overtravel limiting part and the second limiting part interfere with each other, thereby limiting the second limit travel distance of the upper slide rail in the first direction. The second limit travel distance is greater than the first limit travel distance.

2. The automobile seat frame as described in claim 1, characterized in that, It also includes a connecting plate, an adjuster assembly, and a backrest unlocking unit; The backrest unlocking unit is connected to the backrest frame. One end of the connecting plate is fixedly connected to the seat frame, and the other end is connected to the angle adjuster assembly. The backrest unlocking unit is connected to the adjustment handle via an unlocking cable. The adjustment handle can control the backrest unlocking unit to switch between the locked and unlocked states. The backrest unlocking unit is connected to the angle adjuster assembly in the locked state, so that the angle of the backrest frame relative to the seat frame can be adjusted through the angle adjuster assembly. When the backrest unlocking unit is in the unlocked state, it separates from the angle adjuster assembly, allowing the backrest frame to be freed from the angle restriction imposed by the angle adjuster assembly.

3. The automobile seat frame as described in claim 2, characterized in that, It also includes a follow-up handle, which is connected to the seat overtravel unlocking unit via an unlocking cable; The backrest unlocking unit is connected to the follow-up handle in the unlocked state. When the backrest frame rotates counterclockwise, the backrest unlocking unit drives the follow-up handle to move. When the backrest frame rotates counterclockwise to a preset angle, the seat overtravel unlocking unit is in the unlocked state. When the backrest unlocking unit is in the locked state, it is separated from the follow-up handle, and the seat overtravel unlocking unit is in the locked state.

4. A car seat frame as described in any one of claims 1-3, characterized in that, It also includes a seat unlocking unit and a fore-and-aft adjustment handle, the fore-and-aft adjustment handle being connected to the seat unlocking unit and being able to control the seat unlocking unit to switch between a locked state and an unlocked state; When the seat unlocking unit is in the locked state, the position between the upper seat slide rail and the lower seat slide rail is fixed; when the seat unlocking unit is in the unlocked state, the position between the upper seat slide rail and the lower seat slide rail is adjustable.

5. A car seat frame as described in claim 4, characterized in that, The seat overtravel unlocking unit and the seat unlocking unit are connected by a linkage mechanism. When the seat overtravel unlocking unit is in the unlocked state, the seat unlocking unit is also in the unlocked state.

6. A car seat frame as described in claim 2, characterized in that, A backrest adjustment motor is fixedly installed on the backrest frame. The output shaft of the backrest adjustment motor is connected to the angle adjuster assembly, thereby controlling the angle adjustment of the angle adjuster assembly.

7. A car seat frame as described in claim 6, characterized in that, The angle adjuster assembly includes a left angle adjuster assembly and a right angle adjuster assembly, with a left and right synchronizing rod axially connected in series with the backrest adjustment motor, the left angle adjuster assembly, and the right angle adjuster assembly.

8. The automobile seat frame as described in claim 1, characterized in that, The seat frame includes a seat surface, a left side plate, a right side plate, a left upper connecting longitudinal beam, a right upper connecting longitudinal beam, a left front rotating support arm, and a right front rotating support arm. The backrest frame includes a left side panel, a right side panel, a left armrest bracket, and a right armrest bracket; The left and right side panels of the seat basin are fixedly connected to the upper slide rail of the seat. The lower ends of the left and right front rotating support arms are respectively hinged to the left and right side panels of the seat basin. The upper ends of the left and right front rotating support arms are respectively hinged to the front ends of the upper connecting beam of the left and right seat basins. The seat basin surface is connected to the upper connecting beam of the left and right seat basins. The left armrest bracket and the right armrest bracket are respectively fixed to the left side panel and the right side panel of the backrest. The rear ends of the longitudinal beam connecting the left seat basin and the longitudinal beam connecting the right seat basin are respectively hinged to the left armrest bracket and the right armrest bracket.

9. A car seat frame as described in claim 8, characterized in that, The seat frame also includes a seat spring, a left connecting plate of the front horizontal tube, a right connecting plate of the front horizontal tube, a front horizontal tube, and a rear horizontal tube. The two ends of the front horizontal tube are respectively fixed to the front ends of the left front rotating support arm and the right front rotating support arm. The two ends of the rear horizontal tube are respectively fixed to the rear ends of the left front rotating support arm and the right front rotating support arm. The left and right ends of the front horizontal tube are respectively hinged to the left side connecting plate and the right side connecting plate. The front end of the seat basin is fixed to the left side connecting plate and the right side connecting plate of the front horizontal tube. The rear ends of the seat basin are respectively hinged to the left side connecting beam and the right side connecting beam of the seat basin. The front end of the seat spring is connected to the rear end of the seat basin, and the rear end of the seat spring is connected to the rear horizontal tube.

10. A car seat frame as described in claim 8, characterized in that, The backrest frame also includes a left armrest mounting shaft and a right armrest mounting shaft for mounting occupant armrests; one end of the left armrest mounting shaft is fixedly connected to the upper end of the left armrest bracket, and one end of the right armrest mounting shaft is fixedly connected to the upper end of the right armrest bracket.

11. A car seat frame as described in claim 1, characterized in that, It is equipped with an ISOFIX anchor system and top strap anchor points for installing child seats.

12. The automobile seat frame as described in claim 1, characterized in that, The backrest frame includes a left backrest panel, a right backrest panel, an upper backrest crossbeam, a middle safety crossbeam, and a lower backrest crossbeam. The left and right ends of the upper backrest crossbeam are fixedly connected to the upper parts of the left and right backrest panels, respectively. The left and right ends of the middle safety crossbeam are fixedly connected to the upper middle parts of the left and right backrest panels, respectively. The left and right ends of the lower backrest crossbeam are fixedly connected to the lower parts of the left and right backrest panels, respectively. The adjustment handle is installed on the upper backrest crossbeam.

13. A car seat frame as described in claim 12, characterized in that, The backrest upper crossbeam is equipped with a headrest support structure for installing various functional headrests.

14. A car seat, characterized in that, The car seat frame as described in any one of claims 1 to 13 is adopted.

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