Rear seat frame

Abstract

The present application relates to a kind of rear seat frames, including backrest frame assembly, cushion frame assembly, slide rail assembly, rotating shaft, angle adjuster, angle adjuster unlocking mechanism, backrest unlocking mechanism, hinge mechanism, ground lock mechanism, ground lock unlocking mechanism, slide rail unlocking mechanism;Backrest unlocking mechanism of backrest unlocking pull belt, ground lock unlocking mechanism of ground lock unlocking pull belt and slide rail unlocking mechanism of slide rail unlocking pull belt all extend to the rear of rear seat frame.There is beneficial effect: backrest frame assembly can be flipped back and forth, cushion frame assembly can be moved back and forth and can be flipped back and forth as a whole, so as to adjust automobile rear seat according to luggage space requirement;It can be directly operated in luggage to carry out seat backrest flipping back and forth, seat whole back and forth sliding, seat whole back and forth flipping of automobile rear seat.

Description

Technical Field

[0001] This invention relates to the field of automotive seats, and more particularly to a rear seat frame. Background Technology

[0002] Cars have become an essential means of transportation for people, and seats are an essential component of cars. Some of the rear seats in family or commercial vehicles on the market are fixed and cannot be adjusted, some can only have their backrests folded down, and some can only be flipped forward. These cars have small cargo space and are inconvenient for loading and unloading, failing to meet passengers' needs for cargo space.

[0003] The following shortcomings currently exist in the rear seats on the market:

[0004] 1. The rear seats are fixed directly to the vehicle body, and the seat backrests cannot be adjusted or slid forward and backward.

[0005] 2. The backrests of the rear seats are higher than the flat surface of the trunk when folded down, making it inconvenient to load cargo.

[0006] 3. The rear seats can only be folded forward but cannot slide forward, which prevents the trunk space from being maximized;

[0007] 4. The rear seat adjustment handles are located in front of or on the sides of the seats, making them inconvenient to use from behind the trunk. Summary of the Invention

[0008] The purpose of this invention is to overcome the above-mentioned problems in the prior art and to provide a rear seat frame.

[0009] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0010] A rear seat frame includes a backrest frame assembly, a seat cushion frame assembly, and a slide rail assembly. The slide rail assembly is fixed to the vehicle floor. The backrest frame assembly and the seat cushion frame assembly are movably connected via a left-side rotating shaft and a right-side adjuster. An adjuster unlocking mechanism connected to the adjuster is installed on the right side of the backrest frame assembly, and a backrest unlocking mechanism is installed at the rear of the backrest frame assembly. The driven end of the first cable of the backrest unlocking mechanism is engaged with the unlocking bracket of the adjuster unlocking mechanism. The seat cushion frame assembly and the slide rail assembly are movably connected via a front hinge mechanism and a rear floor lock mechanism. A floor lock unlocking mechanism connected to the floor lock mechanism is installed at the rear of the seat cushion frame assembly, and a slide rail unlocking mechanism is installed in the middle of the slide rail assembly. The backrest unlocking strap of the backrest unlocking mechanism, the floor lock unlocking strap of the floor lock unlocking mechanism, and the slide rail unlocking strap of the slide rail unlocking mechanism all extend to the rear of the rear seat frame.

[0011] The beneficial effects of this invention are as follows: A slide rail assembly is installed on the vehicle floor; the front part of the seat cushion frame assembly is hinged to the slide rail assembly via a hinge mechanism; the rear part of the seat cushion frame is movably connected to the slide rail via a ground lock mechanism; and the backrest frame assembly and the seat cushion frame assembly are movably connected via a rotating shaft and an adjuster. By setting a backrest unlocking mechanism, a ground lock unlocking mechanism, and a slide rail unlocking mechanism, the backrest frame assembly can be flipped forward and backward, and the seat cushion frame assembly can move forward and backward as a whole and flip forward and backward, thereby adjusting the rear seats of the car according to the needs of the trunk space. The backrest unlocking strap of the backrest unlocking mechanism, the ground lock unlocking strap of the ground lock unlocking mechanism, and the slide rail unlocking strap of the slide rail unlocking mechanism all extend to the rear of the rear seat frame, allowing the rear seats of the car to be flipped forward and backward, slid forward and backward as a whole, and flipped forward and backward directly from inside the trunk, which is convenient to operate and highly practical. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a structural diagram of the rear seat frame in the present invention when it is used as a seat;

[0014] Figure 2 This is an exploded view of the rear seat frame in this invention;

[0015] Figure 3 This is a schematic diagram of the backrest frame assembly in this invention;

[0016] Figure 4 This is a schematic diagram of the seat cushion frame assembly in this invention;

[0017] Figure 5 This is a schematic diagram of the slide rail assembly in this invention;

[0018] Figure 6 This is a schematic diagram of the structure of the rear seat frame when the backrest frame assembly is in the forward-flipped state in this invention;

[0019] Figure 7 This is a schematic diagram of the structure of the rear seat frame when the backrest frame assembly is flipped forward and the seat cushion frame assembly is slid forward in the present invention.

[0020] Figure 8 This is a schematic diagram of the structure of the rear seat frame in the present invention, in which the backrest frame assembly is flipped forward and the seat cushion frame assembly slides forward and flips forward.

[0021] Figure 9 This is an exploded view of the angle adjuster in this invention;

[0022] Figure 10 This is an exploded view of the ground lock mechanism in this invention;

[0023] Figure 11 This is a schematic diagram of the structure of the core component of the ground lock in this invention;

[0024] Figure 12 This is an exploded view of the core component of the floor lock in this invention;

[0025] Figure 13 This is an exploded view of the slide rail assembly structure in this invention;

[0026] Figure 14 This is a schematic diagram of the structure of the unlocking pivot support plate and rubber buffer pad in this invention.

[0027] Explanation of the numbers in the diagram: Backrest frame assembly 100, Seat cushion frame assembly 200, Slide rail assembly 300, Lower slide rail 310, Locking groove 311, Upper slide rail 320, Lock guide hole 321, Spring insertion hole 322, Lock tongue guide hole 323, Locking mechanism 330, Lock 331, Lock tongue 331a, Lock return spring 332, Limiting plastic cap 333, Steel ball retainer 340, Rotating shaft 1, Angle adjuster 2, Angle adjuster upper connecting plate 21, Adjustment... 22. Angle adjuster core component; 23. Angle adjuster lower connecting plate; 3. Angle adjuster unlocking mechanism; 31. Unlocking bracket; 32. Transmission rod; 33. First reset torsion spring; 34. Angle adjuster unlocking pull strap; 4. Backrest unlocking mechanism; 41. Support frame; 42. Transmission lever; 43. Rotating rivet; 44. First pull cable; 45. Backrest unlocking pull strap; 46. First pull strap guide roller; 5. Hinge mechanism; 5. Upper bracket; 51. Lower bracket; 52. Hinge shaft; 53. Assist torsion spring; 54. Floor lock mechanism; 6. Floor lock. Mounting plate 61, floor lock core component 62, lower bracket 621, cable head mounting groove 621a, slide groove 621b, upper bracket 622, lock leaf 623, first lock leaf rivet 624, second lock leaf rivet 625, lock leaf torsion spring 626, stop hook 627, stop hook rivet 628, stop hook bushing 629, stop hook torsion spring 6210, locking plate 6211, locking plate torsion spring 6212, buffer block 6213, buffer block rivet 6214, floor lock 63. Fixing bolt, 64. Locking wire assembly, 641. Locking wire, 7. Ground lock unlocking mechanism, 71. Second pull cable, 72. Ground lock unlocking pull strap, 8. Slide rail unlocking mechanism, 81. Unlocking shaft support plate, 811. Rubber buffer pad, 82. Unlocking shaft torsion spring, 83. Unlocking rod, 84. Slide rail unlocking pull strap, 85. Second pull strap guide roller, 86. Unlocking pressure plate, 87. Plastic handle, 88. Seat fixing pull strap, 9. Webbing, 91. Hook, 92. Adjustment buckle, 93. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] like Figures 1 to 14 As shown, a rear seat frame includes a backrest frame assembly 100, a seat cushion frame assembly 200, and a slide rail assembly 300. The slide rail assembly is fixed to the vehicle floor. The backrest frame assembly 100 and the seat cushion frame assembly 200 are movably connected by a rotating shaft 1 on the left and an adjuster 2 on the right.

[0030] An angle adjuster unlocking mechanism 3, connected to the angle adjuster 2, is installed on the right side of the backrest frame assembly 100. The angle adjuster unlocking mechanism 3 includes an unlocking bracket 31, a transmission rod 32, a first return torsion spring 33, and an angle adjuster unlocking pull strap 34. The unlocking bracket 31 is rotatably connected to the angle adjuster 2 via the transmission rod 32. The first return torsion spring 33 is sleeved on the transmission rod 32, and its two ends are hooked onto the angle adjuster 2 and the unlocking bracket 31, respectively. The rear end of the angle adjuster unlocking pull strap 34 is fixedly installed at the bottom of the unlocking bracket 31. When the angle adjuster unlocking pull strap 34 is pulled, the angle adjuster 2 will unlock, allowing the angle of the backrest frame assembly 100 to be adjusted.

[0031] The structure of the angle adjuster 2 is as follows Figure 9 As shown, the angle adjuster 2 includes an upper connecting plate 21, a core component 22, and a lower connecting plate 23. The upper connecting plate 21 is screwed onto the lower part of one side of the backrest frame assembly 100, and the lower connecting plate 23 is screwed onto the rear part of one side of the seat cushion frame assembly 200. The upper connecting plate 21 and the lower connecting plate 23 are rotatably connected through the core component 22.

[0032] A backrest unlocking mechanism 4 is installed at the rear of the backrest frame assembly 100. The backrest unlocking mechanism 4 includes a support frame 41, a transmission lever 42, a rotating rivet 43, a first pull cable 44 with a one-to-one structure, a backrest unlocking pull strap 45, and a first pull strap guide roller 46. The support frame 41 is fixed to the lower part of the backrest frame assembly 100. The transmission lever 42 is rotatably connected to the support frame 41 through the rotating rivet 43. The driving end of the first pull cable 44 is engaged with the upper part of the transmission lever 42, and the driven end of the first pull cable 44 is engaged with the unlocking bracket 31. The driven end of the backrest unlocking pull strap 45 is fixed to the lower part of the transmission lever 42. The first pull strap guide roller 46 is fixed to the upper part of the backrest frame assembly 100. The driving end of the backrest unlocking pull strap 45 extends across the first pull strap guide roller 46 to the rear of the backrest frame assembly 100. When the backrest unlocking strap 45 is pulled, the first cable 44 will pull the unlocking bracket 31 under the transmission action of the transmission lever 42, thereby unlocking the angle adjuster 2 and enabling the backrest frame assembly 100 to flip.

[0033] The seat frame assembly 200 and the slide rail assembly 300 are movably connected by the front hinge mechanism 5 and the rear floor lock mechanism 6.

[0034] The hinge mechanism 5 includes an upper bracket 51, a lower bracket 52, a hinge shaft 53, and a torsion spring 54. The upper bracket 51 is fixed to the front bottom of the seat frame assembly 200, and the lower bracket 52 is fixed to the upper slide rail 320 of the slide rail assembly 300. The upper bracket 51 and the lower bracket 52 are rotatably connected via the hinge shaft 53. The torsion spring 54 is sleeved on the hinge shaft 53, with one end of the torsion spring 54 engaged with the upper bracket 51 and the other end engaged with the lower bracket 52. When the ground lock mechanism 6 is unlocked, the seat frame assembly 200 can rotate around the hinge shaft, and the torsion spring 54 reduces the operating force required to rotate the seat frame assembly 200.

[0035] The floor lock mechanism 6 includes a floor lock mounting plate 61, a floor lock core component 62, a floor lock fixing bolt 63, and a lock wire assembly 64. The floor lock mounting plate 61 is fixed to the rear bottom end of the seat frame assembly 200. The floor lock core component 62 is mounted on the floor lock mounting plate 61 by the floor lock fixing bolt 63. The lock wire assembly 64 is fixedly mounted on the upper slide rail 320 of the slide rail assembly 300. The floor lock core component 62 hooks onto the lock wire 641 on the lock wire assembly 64. The floor lock mechanism 6 engages with the lock wire 641 on the lock wire assembly 64 to realize the opening and closing function of the floor lock mechanism 6.

[0036] The rear of the seat cushion frame assembly 200 is equipped with a floor lock unlocking mechanism 7 connected to the floor lock mechanism 6. The floor lock unlocking mechanism 7 includes a second pull cable 71 with a one-to-two structure and a floor lock unlocking pull strap 72. The second pull cable 71 is installed in the seat cushion frame assembly 200. The two driven ends of the second pull cable 71 are respectively engaged in the pull cable head mounting groove 621a of the floor lock core component 62, and the driving end of the second pull cable 71 is engaged in the front of the floor lock unlocking pull strap 72. When the floor lock unlocking pull strap 72 is pulled, the two driven ends of the second pull cable 71 respectively pull the upper part of the floor lock hook plate 62 in the two floor lock mechanisms 6 forward. At this time, the floor lock hook plate 62 rotates backward to release the locking wire 64, thereby unlocking the floor lock mechanism 6, so that the seat cushion frame assembly 200 can rotate around the hinge mechanism 5 as the rotation center.

[0037] The core component 62 of the ground lock includes a lower bracket 621, an upper bracket 622, a locking leaf 623, a first locking leaf rivet 624, a second locking leaf rivet 625, a locking leaf torsion spring 626, a stop hook 627, a stop hook rivet 628, a stop hook bushing 629, a stop hook torsion spring 6210, a locking plate 6211, a locking plate torsion spring 6212, a buffer block 6213, and a buffer block rivet 6214. The lower bracket 621 has a cable head mounting groove 621a at its top front, and the cable head of the driven end of the second cable 71 is installed in the cable head mounting groove 621a. The lower bracket 621 also includes a round hole at its front, a locking plate 6211, a locking plate torsion spring 6212, a stop hook 627, and a stop hook bushing 6214. 9. The round hole at the front of the upper bracket 622 is connected by a stop hook rivet 628. The two ends of the locking plate torsion spring 6212 are hooked onto the stop hook and the locking plate respectively. The stop hook torsion spring is sleeved on the stop hook bushing. The two ends of the stop hook torsion spring are hooked onto the upper bracket and the stop hook respectively. The round hole at the rear of the upper bracket, the locking leaf torsion spring and the round hole at the rear of the locking leaf are connected by a first locking leaf rivet. The two ends of the locking leaf torsion spring are hooked onto the upper bracket and the locking leaf respectively. The second locking leaf rivet is installed in the mounting hole at the front of the locking leaf, and the end of the second locking leaf rivet near the lower bracket slides into the groove 621b on the side of the upper bracket. The buffer block is installed in the middle of the bottom of the upper bracket by a buffer block rivet, so that the buffer block is located between the stop hook and the locking leaf.

[0038] A slide rail unlocking mechanism 8 is installed in the middle of the slide rail assembly 300. The slide rail unlocking mechanism 8 includes an unlocking shaft support plate 81, an unlocking shaft 82, an unlocking shaft torsion spring 83, an unlocking rod 84, a slide rail unlocking pull strap 85, and two sets of second pull strap guide rollers 86. The unlocking shaft support plate 81 is fixed to the top of the upper slide rail 320 of the slide rail assembly 300. The two ends of the unlocking shaft 82 are respectively rotatably installed in the round holes on the unlocking shaft support plate 81. An L-shaped unlocking pressure plate 87 is also fixed to each end of the unlocking shaft 82. The head of the unlocking pressure plate 87 is locked to the locking mechanism 330 of the slide rail assembly 300. The top of the unlocking shaft 82 is in contact with the top of the unlocking shaft. An unlocking shaft torsion spring 83 is installed at each of the left and right ends of the unlocking shaft 82. The two ends of the unlocking shaft torsion spring 83 are hooked onto the unlocking shaft support plate 81 and the unlocking pressure plate 87, respectively. The rear end of the unlocking rod 84 is fixed to the middle of the unlocking shaft 82. The driven end of the slide rail unlocking pull strap 85 is connected to the front of the unlocking rod 84. Two sets of second pull strap guide rollers 86 are installed at the middle of the front and the middle of the rear of the seat frame assembly 200, respectively. The driving end of the slide rail unlocking pull strap 85 passes over the two sets of second pull strap guide rollers 86 from front to back and extends to the rear of the seat frame assembly 200. When the passenger is in front of the seat, the unlocking lever 84 can be pulled upwards, the unlocking shaft 82 rotates, and the unlocking pressure plate 87 unlocks the locking mechanism 330 of the slide rail assembly. After the slide rail assembly 300 is unlocked, the seat cushion frame assembly can be adjusted in the fore-and-aft direction. When the passenger is behind the seat, the slide rail unlocking strap 85 can be pulled backwards, thereby pulling the unlocking lever 84 upwards and unlocking the locking mechanism of the slide rail assembly. After the slide rail assembly is unlocked, the seat cushion frame assembly can be adjusted in the fore-and-aft direction.

[0039] The front end of the unlock lever 84 is also equipped with a plastic handle 88 to facilitate unlocking the vehicle from the front of the car seat.

[0040] A rubber buffer pad 811 is also installed on the unlocking pivot support plate 81. The rubber buffer pad 811 is located above the head of the unlocking pressure plate 87, which reduces the impact force of the unlocking pressure plate 87 colliding with the unlocking pivot support plate 81 when it is reset, and plays a buffering and protection role for the unlocking pressure plate 87.

[0041] The slide rail assembly 300 includes two parallel lower slide rails 310, two parallel upper slide rails 320, and a locking mechanism 330. The upper slide rails 320 are slidably installed in the lower slide rails 310. Two steel ball retainers 340 are sandwiched between the upper slide rails 320 and the lower slide rails 310. Multiple steel balls are rotatably installed on the steel ball retainers 340.

[0042] Each locking mechanism 330 includes two symmetrical locking clips 331, two locking clip return springs 332, and two limiting plastic caps 333. The top of the upper slide rail 320 has two symmetrical locking clip guide holes 321. The top of the locking clip 331 passes through the locking clip guide holes 321 from bottom to top. The two ends of the locking clip return springs 332 are respectively inserted into the spring insertion holes 322 on the side wall of the upper slide rail 320. The locking clip return springs 332 are fitted into the spring mounting holes in the middle of the inner side of the locking clip 331. A limiting plastic cap 333 is interference-fitted to the top of each locking clip 331. The bottom of the card 331 is provided with five horizontally outwardly extending locking tongues 331a. The side walls on the left and right sides of the upper slide rail 310 are respectively provided with five locking tongue guide holes 323. The inner walls on the left and right sides of the lower slide rail 310 are respectively provided with several locking grooves 311. After the locking tongue 331a passes through the locking tongue guide hole 323, it is inserted into the locking groove 311, so that the upper slide rail 320 and the lower slide rail 310 are relatively stationary. When the unlocking pressure plate 87 moves downward and presses down the limiting plastic cap 333, it drives the lock card to move downward, so that the locking tongue is pulled out from the locking groove. At this time, the upper slide rail and the lower slide rail can move relative to each other.

[0043] A seat fixing strap 9 is installed at the middle of the rear end of the seat cushion frame assembly 200. The seat fixing strap 9 includes a webbing 91, a hook 92, and an adjusting buckle 93 for adjusting the length of the webbing. One end of the webbing 91 is fixed to the middle of the rear end of the seat cushion frame assembly 200. The other end of the webbing 91 is bent and movably connected to the middle of the webbing 91 by the adjusting buckle 93. The strip hole of the hook 92 fits into the bend of the webbing 91. When the rear seats are flipped up, the hook of the seat fixing strap needs to be hooked onto the headrest guide rod of the front seat to fix the seat in its flipped position.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A rear seat frame, comprising a backrest frame assembly, a seat cushion frame assembly, and a slide rail assembly, wherein the slide rail assembly is fixed to the vehicle floor, and the backrest frame assembly and the seat cushion frame assembly are movably connected via a left-side rotating shaft and a right-side adjuster, characterized in that: An adjuster unlocking mechanism connected to an adjuster is installed on the right side of the backrest frame assembly, and a backrest unlocking mechanism is installed at the rear of the backrest frame assembly. The driven end of the first cable of the backrest unlocking mechanism is engaged with the unlocking bracket of the adjuster unlocking mechanism. The seat cushion frame assembly and the slide rail assembly are movably connected via a front hinge mechanism and a rear floor lock mechanism. A floor lock unlocking mechanism connected to the floor lock mechanism is installed at the rear of the seat cushion frame assembly, and a slide rail unlocking mechanism is installed in the middle of the slide rail assembly. The backrest unlocking strap of the backrest unlocking mechanism, the floor lock unlocking strap of the floor lock unlocking mechanism, and the slide rail unlocking strap of the slide rail unlocking mechanism all extend to the rear of the rear seat frame. The ground lock mechanism includes a ground lock mounting plate, a ground lock core component, a ground lock fixing bolt, and a lock wire assembly. The ground lock mounting plate is fixed to the rear bottom of the seat frame assembly. The ground lock core component is mounted on the ground lock mounting plate by the ground lock fixing bolt. The lock wire assembly is fixedly mounted on the upper slide rail of the slide rail assembly. The ground lock core component hooks onto the lock wire on the lock wire assembly. The ground lock mechanism also includes a second cable with a one-to-two structure and a ground lock unlocking strap. The second cable is installed in the seat frame assembly. The two driven ends of the second cable are respectively engaged in the cable head mounting groove of the ground lock core component. The driving end of the second cable is engaged in the front of the ground lock unlocking strap. The core components of the ground lock include a lower bracket, an upper bracket, a locking leaf, a first locking leaf rivet, a second locking leaf rivet, a locking leaf torsion spring, a stop hook, a stop hook rivet, a stop hook bushing, a stop hook torsion spring, a locking plate, a locking plate torsion spring, a buffer block, and a buffer block rivet. The front top of the lower bracket has a cable head mounting groove, in which the driven end of the second cable is installed. The round hole at the front of the lower bracket, the locking plate, the locking plate torsion spring, the stop hook, the stop hook bushing, and the round hole at the front of the upper bracket are connected in series by the stop hook rivet. The two ends of the locking plate torsion spring are hooked onto the stop hook. On the moving hook and locking plate, the stop hook torsion spring is sleeved on the stop hook bushing, and the two ends of the stop hook torsion spring are hooked on the upper bracket and the stop hook respectively; the round hole at the rear of the upper bracket, the lock leaf torsion spring and the round hole at the rear of the lock leaf are connected in series by the first lock leaf rivet, and the two ends of the lock leaf torsion spring are hooked on the upper bracket and the lock leaf respectively; the second lock leaf rivet is installed in the mounting hole at the front of the lock leaf, and the end of the second lock leaf rivet near the lower bracket slides in engagement with the sliding groove on the side of the upper bracket; the buffer block is installed in the middle of the bottom of the upper bracket by the buffer block rivet, so that the buffer block is located between the stop hook and the lock leaf.

2. The rear seat frame according to claim 1, characterized in that: The angle adjuster unlocking mechanism includes an unlocking bracket, a transmission rod, a first reset torsion spring, and an angle adjuster unlocking pull strap. The unlocking bracket is rotatably connected to the angle adjuster through the transmission rod. The first reset torsion spring is sleeved on the transmission rod, and the two ends of the first reset torsion spring are hooked onto the angle adjuster and the unlocking bracket, respectively. The rear end of the angle adjuster unlocking pull strap is fixedly installed at the bottom of the unlocking bracket.

3. The rear seat frame according to claim 1, characterized in that: The backrest unlocking mechanism includes a support frame, a transmission lever, a rotating rivet, a first pull cable with a one-to-one structure, a backrest unlocking pull strap, and a first pull strap guide roller. The support frame is fixed to the lower part of the backrest frame assembly. The transmission lever is rotatably connected to the support frame via the rotating rivet. The driving end of the first pull cable is engaged with the upper part of the transmission lever, and the driven end of the first pull cable is engaged with the unlocking bracket. The driven end of the backrest unlocking pull strap is fixed to the lower part of the transmission lever. The first pull strap guide roller is fixed to the upper part of the backrest frame assembly, and the driving end of the backrest unlocking pull strap extends across the first pull strap guide roller to the rear part of the backrest frame assembly.

4. The rear seat frame according to claim 1, characterized in that: The hinge mechanism includes an upper bracket, a lower bracket, a hinge shaft, and an assist torsion spring. The upper bracket is fixed to the front bottom of the seat frame assembly, and the lower bracket is fixed to the upper slide rail of the slide rail assembly. The upper bracket is rotatably connected to the lower bracket through the hinge shaft. The assist torsion spring is sleeved on the hinge shaft, with one end of the assist torsion spring engaged with the upper bracket and the other end of the assist torsion spring engaged with the lower bracket.

5. The rear seat frame according to claim 1, characterized in that: The slide rail unlocking mechanism includes an unlocking pivot support plate, an unlocking pivot, an unlocking pivot torsion spring, an unlocking rod, a slide rail unlocking pull strap, and two sets of second pull strap guide rollers. The unlocking pivot support plate is fixed to the top of the upper slide rail of the slide rail assembly. The two ends of the unlocking pivot are rotatably installed in the round holes on the unlocking pivot support plate. An L-shaped unlocking pressure plate is also fixed to each end of the unlocking pivot. The head of the unlocking pressure plate contacts the top of the locking mechanism of the slide rail assembly. An unlocking pivot torsion spring is installed at each of the left and right ends of the unlocking pivot. The two ends of the unlocking pivot torsion spring are hooked onto the unlocking pivot support plate and the unlocking pressure plate, respectively. The rear end of the unlocking rod is fixed to the middle of the unlocking pivot. The driven end of the slide rail unlocking pull strap is connected to the front of the unlocking rod. The two sets of second pull strap guide rollers are respectively installed in the middle of the front and rear of the seat cushion frame assembly. The driving end of the slide rail unlocking pull strap passes over the two sets of second pull strap guide rollers from front to back and extends to the rear of the seat cushion frame assembly.

6. The rear seat frame according to claim 1, characterized in that: A seat fixing strap is installed at the middle of the rear end of the seat cushion frame assembly. The seat fixing strap includes a webbing, a hook, and an adjustment buckle for adjusting the length of the webbing. One end of the webbing is fixed to the middle of the rear end of the seat cushion frame assembly. The other end of the webbing is bent and movably connected to the middle of the webbing with the adjustment buckle. The strip hole of the hook fits into the bend of the webbing.

Images