A built-in seat leg rest with a C-shaped arc chute and double rollers

Abstract

The present invention relates to the technical field of automobile seats, and discloses a built-in seat leg rest with a C-shaped circular arc slide and double rollers, including a seat cushion frame, a synchronization rod, etc. The left sheet metal bracket is riveted with rivets to form an assembly and then welded to the seat cushion frame, the right sheet metal bracket is riveted with rivets to form an assembly and then welded to the seat cushion frame, and the middle sheet metal bracket is welded to the seat cushion frame; the large roller and the small roller are assembled to the rivets; the left limit bar and the right limit bar are assembled to the middle sheet metal bracket; the motor is assembled to the seat cushion frame using a first screw. This is a built-in seat leg rest with a C-shaped circular arc slide and double rollers. This solution adopts a C-shaped circular arc slide + double roller structure, which can not only solve the problem of the leg rest shaking up and down and left and right when running, but also has a simple process, convenient assembly and low cost; the large plastic part of the present invention is decomposed into three plastic parts, and the three plastic parts are connected by screws to solve the problem that the large plastic part cannot be demolded in the process.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, in particular to a built-in seat leg support with a C-shaped arc slide groove and double rollers. Background Art

[0002] The existing calf rests on the market can generally only be used on the front or middle row seats, but not on the rear seats, due to the space in the rear row of the car body. The leg rest of this solution can be used not only in the front and middle rows, but also in the rear row of the car. With the development of society, people's requirements for the functions and comfort of products are increasing. Users also hope to have a leg rest to lift their calves when sitting in the back row to make themselves more comfortable. During the use and adjustment of the leg rest, the motor is powered on and rotates the drive rod, which drives the metal gear to rotate. The rotation of the metal gear drives the metal arc rack to rotate. The rotation of the arc rack drives the driven structure of the leg rest to slide forward from under the seat cushion, thereby propping up the passenger's calf.

[0003] The existing leg support structure: ① The arc-shaped metal rack is too thick and cannot be processed by the current fine stamping method, and machining will greatly increase the cost. ② Large plastic parts cannot be demolded. ③ In addition, the guide slide of the leg support is a C-shaped arc slide stamping part. The clamping distance of the C-shaped arc slide stamping part is short, resulting in obvious shaking of the leg support and poor rigidity. ④ After the needle roller cage plastic part is installed in the C-shaped arc slide stamping part, it is difficult to assemble the needle roller bearing into the needle roller cage plastic part, making the assembly process difficult to achieve. ⑤ Even if the needle roller bearing and the needle roller cage are barely assembled, it is difficult to ensure the gap between the upper and lower needle roller shafts.

[0004] Summary of existing solutions: The leg rest shakes greatly up and down and left and right when in operation, which cannot meet the user experience requirements of passengers.

[0005] For this purpose, we propose a built-in seat leg support with a C-shaped arc slide and double rollers. Summary of the invention

[0006] The present invention mainly solves the technical problems existing in the above-mentioned prior art and provides a built-in seat leg support with a C-shaped arc slide and double rollers.

[0007] To achieve the above object, the present invention adopts the following technical solutions. An in - built seat leg rest with a C - shaped arc chute and double rollers includes a seat cushion skeleton, a synchronous rod, a thrust cap, a metal bushing, a plastic bushing, a motor, a left sheet metal bracket, a rivet, a middle sheet metal bracket, a right sheet metal bracket, a gear, a small roller, a large roller, a left limit bar, a right limit bar, a first screw, a left arc plastic part guide rail, a right arc plastic part guide rail, a middle large plastic guide rail, a second screw, a front - end plastic roller, a screw rod, a nut, a middle connecting sheet metal, an arc rack, a left limit sheet metal, a right limit sheet metal, a C - shaped arc chute stamping part, a limit rubber, a third screw, a fourth screw and a bearing. The left sheet metal bracket is riveted with the rivet into an assembly and then welded to the seat cushion skeleton. The right sheet metal bracket is riveted with the rivet into an assembly and then welded to the seat cushion skeleton. The middle sheet metal bracket is welded to the seat cushion skeleton; the large roller and the small roller are assembled onto the rivet; the left limit bar and the right limit bar are assembled onto the middle sheet metal bracket; the motor is assembled onto the seat cushion skeleton with the first screw; the metal bushing is assembled into the round holes of the seat cushion skeleton, the left sheet metal bracket, the right sheet metal bracket and the middle sheet metal bracket; the plastic bushing is assembled into the hole of the metal bushing; the synchronous rod passes through the holes of the motor, the plastic bushing and the gear; the thrust cap is stuck at both ends of the synchronous rod; the left arc plastic part guide rail is fixed to the middle large plastic guide rail with the second screw; the right arc plastic part guide rail is fixed to the middle large plastic guide rail with the second screw.

[0008] Preferably, the C - shaped arc chute stamping part, the middle connecting sheet metal, the arc rack, the left limit sheet metal and the right limit sheet metal are welded together.

[0009] Preferably, the assembly formed by welding the C - shaped arc chute stamping part, the middle connecting sheet metal, the arc rack, the left limit sheet metal and the right limit sheet metal together is assembled onto the middle large plastic guide rail with the fourth screw; the bearings are installed on both sides of the front - end plastic roller.

[0010] Preferably, the screw rod passes through the front - end plastic roller and the bearings; the assembly of the screw rod, the plastic roller and the bearings is assembled onto the front end of the middle connecting sheet metal; the nut is tightened at both ends of the screw rod.

[0011] Preferably, the C - shaped arc chute stamping part meshes with both the large roller and the small roller, and the arc rack meshes with the gear.

[0012] Preferably, the limit rubber slides into the rear end of the C - shaped arc chute stamping part, and the third screw fixes the limit rubber to the C - shaped arc chute stamping part.

[0013] Preferably, the left arc plastic part guide rail and the right arc plastic part guide rail are in a symmetrical state.

[0014] Preferably, the large plastic part is decomposed into three plastic parts and connected by screws to solve the problem that the large plastic part cannot be demolded in the process.

[0015] Beneficial Effects

[0016] The present invention provides a C-shaped arc slide and a double roller built-in seat leg support, which has the following beneficial effects:

[0017] (1) The built-in seat leg rest with a C-shaped arc slide and double rollers adopts a C-shaped arc slide + double roller structure, which not only solves the problem of the leg rest shaking up and down and left and right when in operation, but also has simple process, convenient assembly and low cost.

[0018] (2) The seat leg support with a C-shaped arc slide and double rollers is a large plastic part that is decomposed into three plastic parts. The three plastic parts are connected by screws to solve the problem that the large plastic part cannot be demolded during the process.

[0019] (3) This is a C-shaped arc slide and double roller built-in seat leg rest. The new structure of the leg rest has a metal arc rack thickness of 6 mm and directly adopts fine stamping technology to achieve mass production, which can greatly reduce the industrialization cost.

[0020] (4) The built-in seat leg rest with a C-shaped arc slide and double rollers changes the position of the C-shaped arc slide stamping structure from the middle to both sides and increases the length of the C-shaped arc slide stamping, so that the leg rest mechanism can be in a stable state during the entire operation process, thereby improving the rigidity and stability of the leg rest.

[0021] (5) The C-shaped arc slide and double roller built-in seat leg rest uses a double roller structure to make up-down contact with the C-shaped arc slide stamping part, so that when the leg rest slides out, the double rollers keep in contact with the C-shaped arc slide stamping part, and the double rollers and the C-shaped arc slide stamping part perform pure rolling motion, thereby reducing the friction force on the leg rest when it slides out. This makes the leg rest stable during operation, and passengers cannot feel the shaking during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for the implementation or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0023] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the ratio relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0024] Figure 1 is a schematic diagram of the whole of the present invention;

[0025] Figure 2 is a three-dimensional view of the driven structure of the leg rest of the present invention;

[0026] Figure 3 is a schematic diagram of the unfolded state of the leg rest of the present invention;

[0027] Figure 4 is a schematic diagram of the retracted state of the leg rest of the present invention.

[0028] Legend Explanation:

[0029] 1. Seat cushion skeleton; 2. Synchronous rod; 3. Thrust cap; 4. Metal bushing; 5. Plastic bushing; 6. Motor; 7. Left sheet metal bracket; 8. Rivet; 9. Intermediate sheet metal bracket; 10. Right sheet metal bracket; 11. Gear; 12. Small roller; 13. Large roller; 14. Left limit bar; 15. Right limit bar; 16. First screw; 17. Left arc plastic part guide rail; 18. Right arc plastic part guide rail; 19. Intermediate large plastic guide rail; 20. Second screw; 21. Front-end plastic roller; 22. Screw rod; 23. Nut; 24. Intermediate connecting sheet metal; 25. Arc rack; 26. Left limit sheet metal; 27. Right limit sheet metal; 28. C-shaped circular arc chute stamping part; 29. Limit rubber; 30. Third screw; 31. Fourth screw; 32. Bearing. Detailed Embodiment

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] An in-built seat leg rest with a C-shaped circular arc chute and double rollers, as Figures 1 - 4As shown in the figure, it includes a seat cushion skeleton 1, a synchronizing rod 2, a thrust cap 3, a metal bushing 4, a plastic bushing 5, a motor 6, a left sheet metal bracket 7, a rivet 8, an intermediate sheet metal bracket 9, a right sheet metal bracket 10, a gear 11, a small roller 12, a large roller 13, a left limit strip 14, a right limit strip 15, a first screw 16, a left arc plastic part guide rail 17, a right arc plastic part guide rail 18, an intermediate large plastic guide rail 19, a second screw 20, a front-end plastic roller 21, a screw rod 22, a nut 23, an intermediate connecting sheet metal 24, an arc rack 25, a left limit sheet metal 26, a right limit sheet metal 27, a C-shaped arc chute stamping part 28, a limit rubber 29, a third screw 30, a fourth screw 31 and a bearing 32;

[0032] The seat cushion skeleton 1 can be regarded as a rigid part. After the left sheet metal bracket 7 and the rivet 8 are riveted into an assembly, it is welded to the seat cushion skeleton 1. After the right sheet metal bracket 10 and the rivet 8 are riveted into an assembly, it is welded to the seat cushion skeleton 1. The intermediate sheet metal bracket 9 is welded to the seat cushion skeleton 1; the large roller 13 and the small roller 12 are assembled onto the rivet 8; the left limit strip 14 and the right limit strip 15 are assembled onto the intermediate sheet metal bracket 9; the motor 6 is assembled onto the seat cushion skeleton 1 by the first screw 16; the metal bushing 4 is assembled into the round holes of the seat cushion skeleton 1, the left sheet metal bracket 7, the right sheet metal bracket 10, and the intermediate sheet metal bracket 9; the plastic bushing 5 is assembled into the hole of the metal bushing 4; the synchronizing rod 2 passes through the holes of the motor 6, the plastic bushing 5, and the gear 11; the thrust cap 3 is stuck at both ends of the synchronizing rod 2; the left arc plastic part guide rail 17 is fixed to the intermediate large plastic guide rail 19 with the second screw 20; the right arc plastic part guide rail 18 is fixed to the intermediate large plastic guide rail 19 with the second screw 20.

[0033] The C-shaped arc chute stamping part 28, the intermediate connecting sheet metal 24, the arc rack 25, the left limit sheet metal 26 and the right limit sheet metal 27 are welded together.

[0034] The assembly formed by welding the C-shaped arc chute stamping part 28, the intermediate connecting sheet metal 24, the arc rack 25, the left limit sheet metal 26 and the right limit sheet metal 27 together is assembled onto the intermediate large plastic guide rail 19 with the fourth screw 31; the bearing 32 is installed on both sides of the front-end plastic roller 21.

[0035] The screw rod 22 passes through the front-end plastic roller 21 and the bearing 32; the assembly of the screw rod 22, the plastic roller 21 and the bearing 32 is assembled onto the front end of the intermediate connecting sheet metal 24; the nut 23 is tightened at both ends of the screw rod 22.

[0036] The C-shaped arc chute stamping part 28 acts on the large roller 13 and the small roller 12, and the arc rack 25 meshes with the gear 11.

[0037] The limit rubber 29 slides into the rear end of the C-shaped arc chute stamping part 28, and the third screw 30 fixes the limit rubber 29 to the C-shaped arc chute stamping part 28.

[0038] The left arc-shaped plastic guide rail 17 and the right arc-shaped plastic guide rail 18 are symmetrical.

[0039] The arc-shaped rack 25 of the present invention was originally machined with a thickness of 20 mm, but is now optimized to a thickness of 6 mm using a fine punching process to achieve mass production, which can greatly reduce industrialization costs.

[0040] Leg rest working principle:

[0041] Leg support income:

[0042] When the motor 6 is powered on, the forward rotation of the motor 6 will drive the synchronous rod 2 to rotate forward, the forward rotation of the synchronous rod 2 will drive the gear 11 to rotate forward, and the forward rotation of the gear 11 will drive the arc rack 25 to rotate reversely. At this time, the large roller 13 and the small roller 12 rotate on the rivet 8 and roll relative to the C-shaped arc groove stamping part 28, so that the driven structure of the leg rest is retracted under the seat cushion frame 1. When the left limit sheet metal 26 and the right limit sheet metal 27 contact the left limit bar 14 and the right limit bar 15, the motor is blocked and the leg rest can no longer be retracted backward.

[0043] Leg rest extended:

[0044] When the motor 6 is powered on, the reverse rotation of the motor 6 will drive the synchronous rod 2 to reverse, the reverse rotation of the synchronous rod 2 will drive the gear 11 to reverse, and the reverse rotation of the gear 11 will drive the arc rack 25 to rotate forward. At this time, the large roller 13 and the small roller 12 rotate on the rivet 8 and roll relative to the C-shaped arc groove stamping part 28, so that the driven structure of the leg rest can be stably expanded to the front to lift the passenger's calf. When the limiting rubber 29 contacts the small roller 12, the motor is blocked and the leg rest can no longer be expanded forward and backward.

[0045] The C-shaped arc slide + double roller structure not only solves the problem of the leg rest shaking up and down and left and right when in operation, but also has simple process, convenient assembly and low cost; the large plastic part is decomposed into three plastic parts, and the three plastic parts are connected by screws to solve the problem that the large plastic part cannot be demolded in the process;

[0046] The new structure of the leg support has a metal arc rack thickness of 6mm, and directly adopts the precision stamping process to achieve mass production, which can greatly reduce the industrialization cost. The metal arc rack in the existing technology is too thick and cannot be processed by the current precision stamping method. Machining will greatly increase the cost. Reducing the thickness of the metal rack and adopting the precision stamping process can greatly reduce the manufacturing cost.

[0047] Change the position of the C-shaped arc chute stamping part structure from the middle to both sides, and increase the length of the C-shaped arc chute stamping part, so that the leg rest mechanism can always be in a stable state during the entire operation process, improving the rigidity and stability of the leg rest. Use a double-roller structure to make up-and-down contact with the C-shaped arc chute stamping part, so that during the sliding-out process of the leg rest, the double rollers remain in contact with the C-shaped arc chute stamping part, and the double rollers and the C-shaped arc chute stamping part perform pure rolling motion, reducing the friction force received during the sliding-out of the leg rest. Make the leg rest stable during operation, and passengers can't feel the shaking during use.

[0048] The above shows and describes 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 by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An embedded seat leg rest with a C-shaped arc chute and double rollers, comprising a seat cushion skeleton (1), a synchronous rod (2), a thrust cap (3), a metal bushing (4), a plastic bushing (5), a motor (6), a left sheet metal bracket (7), a rivet (8), a middle sheet metal bracket (9), a right sheet metal bracket (10), a gear (11), a small roller (12), a large roller (13), a left limit strip (14), a right limit strip (15), a first screw (16), a left arc plastic part guide rail (17), a right arc plastic part guide rail (18), a middle large plastic guide rail (19), a second screw (20), a front-end plastic roller (21), a screw rod (22), a nut (23), a middle connecting sheet metal (24), an arc rack (25), a left limit sheet metal (26), a right limit sheet metal (27), a C-shaped arc chute stamping part (28), a limit rubber (29), a third screw (30), a fourth screw (31) and a bearing (32), characterized in that: After the left sheet metal bracket (7) and the rivet (8) are riveted into an assembly, they are welded to the seat cushion frame (1). After the right sheet metal bracket (10) and the rivet (8) are riveted into an assembly, they are welded to the seat cushion frame (1). The middle sheet metal bracket (9) is welded to the seat cushion frame (1); the large roller (13) and the small roller (12) are assembled onto the rivet (8); the left limit strip (14) and the right limit strip (15) are assembled onto the middle sheet metal bracket (9); the motor (6) is assembled onto the seat cushion frame (1) using the first screw (16); the metal bushing (4) is assembled into the round holes of the seat cushion frame (1), the left sheet metal bracket (7), the right sheet metal bracket (10), and the middle sheet metal bracket (9); the plastic bushing (5) is assembled into the hole of the metal bushing (4); the synchronizing rod (2) passes through the holes of the motor (6), the plastic bushing (5), and the gear (11); the thrust caps (3) are stuck at both ends of the synchronizing rod (2); the left arc plastic part guide rail (17) is fixed to the middle large plastic guide rail (19) using the second screw (20); the right arc plastic part guide rail (18) is fixed to the middle large plastic guide rail (19) using the second screw (20); the arc-shaped rack (25) is precision blanked to a thickness of 6 mm.

2. The built-in seat leg rest with a C-shaped arc chute and double rollers according to claim 1, characterized in that: The C-shaped circular arc chute stamping part (28), the middle connecting sheet metal (24), the arc-shaped rack (25), the left limit sheet metal (26), and the right limit sheet metal (27) are welded together.

3. The built-in seat leg rest with a C-shaped arc chute and double rollers according to claim 2, characterized in that: The assembly formed by welding the C-shaped circular arc chute stamping part (28), the middle connecting sheet metal (24), the arc-shaped rack (25), the left limit sheet metal (26), and the right limit sheet metal (27) together is assembled onto the middle large plastic guide rail (19) using the fourth screw (31); the bearings (32) are installed on both sides of the front plastic roller (21).

4. The built-in seat leg rest with a C-shaped arc chute and double rollers according to claim 3, wherein: The screw rod (22) passes through the front plastic roller (21) and the bearings (32); the assembly of the screw rod (22), the plastic roller (21), and the bearings (32) is assembled onto the front end of the middle connecting sheet metal (24); the nuts (23) are tightened at both ends of the screw rod (22).

5. The built-in seat leg rest with a C-shaped arc chute and double rollers according to claim 4, characterized in that: The C-shaped circular arc chute stamping part (28) meshes with both the large roller (13) and the small roller (12), and the arc-shaped rack (25) meshes with the gear (11).

6. The built-in seat leg rest with a C-shaped arc chute and double rollers according to claim 5, characterized in that: The limit rubber (29) slides into the rear end of the C-shaped circular arc chute stamping part (28), and the third screw (30) fixes the limit rubber (29) to the C-shaped circular arc chute stamping part (28).

7. The built-in seat leg rest with a C-shaped arc chute and double rollers according to claim 1, wherein: The left arc plastic part guide rail (17) and the right arc plastic part guide rail (18) are in a symmetrical state.

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