A large angle manual seat folding mechanism

Abstract

This invention relates to a large-angle manual seat folding mechanism, comprising a support ring and an upper plate rotatable around the support ring. The support ring has a first arcuate protrusion, a second arcuate protrusion, and an arcuate long segment spaced apart from each other. The upper plate has a first arcuate boss, a second arcuate boss, and an arcuate long segment spaced apart from each other. In the locked state, the first arcuate boss and the first arcuate protrusion engage at a first engagement point, the second arcuate boss and the second arcuate protrusion engage at a second engagement point, and the arcuate long segment engages with the arcuate long segment at a third engagement point. Two of the first, second, and third engagement points are located on a first plane, and the remaining engagement point is located on a second plane offset from the first plane. According to the large-angle manual seat folding mechanism of this invention, two of the three engagement points of the support ring and the upper plate, along with the remaining engagement point, are located on two offset planes, enabling a maximum folding angle of 180°.

Description

Technical Field

[0001] This invention relates to automobile seats, and more specifically to a large-angle manual seat folding mechanism. Background Technology

[0002] CN105026205B discloses an accessory for a vehicle seat, comprising a first accessory portion and a second accessory portion capable of rotating relative to each other and connected to each other by gears or capable of locking each other, and a third accessory portion mounted on a support ring. The support ring is fastened to the first accessory portion to be pivotable relative to the first accessory portion about an axis. The support ring includes a plurality of lifting cams that interact with a plurality of protrusions on the third accessory portion to minimize the radial free clearance between the support ring and the third accessory portion. However, since the features for eliminating the clearance are all on a single plane and interact with each other, the maximum folding angle of this design is 90°, and a 100° fold will cause interference and cannot be achieved. Summary of the Invention

[0003] To address the problem that the maximum folding angle in the prior art is only 90°, the present invention provides a large-angle manual seat folding mechanism.

[0004] According to the present invention, a large-angle manual seat folding mechanism includes a support ring and an upper plate rotatable around the support ring. The support ring has a first arcuate protrusion, a second arcuate protrusion, and an arcuate long segment spaced apart from each other. The upper plate has a first arcuate boss, a second arcuate boss, and an arcuate long segment spaced apart from each other. In the locked state, the first arcuate boss and the first arcuate protrusion engage at a first engagement point, the second arcuate boss and the second arcuate protrusion engage at a second engagement point, and the arcuate long segment engages with the arcuate long segment at a third engagement point. Two of the first, second, and third engagement points are located on a first plane, and the remaining engagement point is located on a second plane offset from the first plane.

[0005] Preferably, the upper plate has a central through hole, and the support ring has an annular portion and a flange portion, wherein the annular portion extends axially to be accommodated in the central through hole for installation, and the flange portion extends radially outward from the end edge of the annular portion.

[0006] Preferably, the first arcuate bulge is formed by radially protruding outward from the cylindrical outer surface of the annular portion, and the first arcuate boss is formed by radially protruding inward from the cylindrical surface of the central through hole.

[0007] Preferably, the second arcuate bulge is formed by radially protruding outward from the cylindrical outer surface of the flange portion, and the second arcuate boss is formed by axially protruding forward and radially inward from the upper plate near the central through hole.

[0008] Preferably, the long arc segment is directly integrated into the cylindrical outer surface of the flange portion, and the long arc segment protrudes forward and radially inward from the plate body of the upper plate near the central through hole.

[0009] Preferably, the first, second, and third mating points are three meshing points that are 120° apart from each other relative to the rotation center of the upper plate.

[0010] Preferably, the manual seat folding mechanism further includes an open protruding ring, which is fixedly connected to the upper plate.

[0011] Preferably, the two opposite ends of the open convex ring are directly formed as a second arcuate boss and a long arcuate convex hull.

[0012] Preferably, the open protruding ring is fixed to the upper plate by welding or riveting.

[0013] Preferably, the manual seat folding mechanism further includes an angle adjuster, and the support ring and the angle adjuster are connected and fixed by full-circle laser welding, projection welding or arc welding.

[0014] According to the large-angle manual seat folding mechanism of the present invention, two of the three mating points of the support ring and the upper plate are located on a first plane, and the remaining mating point is located on a second plane offset from the first plane, achieving a maximum folding angle of 180°. Adding a stop block during the folding stroke enables backward compatibility, meeting any angle requirement less than 180°, and achieving a modular design. The large-angle manual seat folding mechanism of the present invention has a relatively simple structure, incurs no additional cost, and increases the folding angle to 180°, making it suitable for all situations requiring a large-angle folding mechanism. Attached Figure Description

[0015] Figure 1 This is an assembly diagram of a large-angle manual seat folding mechanism according to a preferred embodiment of the present invention.

[0016] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the manual seat folding mechanism.

[0017] Figure 3 Show Figure 2 The manual seat folding mechanism is flipped to the 0° locking position.

[0018] Figure 4 Show Figure 2 The manual seat folding mechanism rotates 90° to the first folding position.

[0019] Figure 5 Show Figure 2 The manual seat folding mechanism flips the seat 180° to a second folding position.

[0020] Figure 6 yes Figure 1 A schematic diagram of the first structure of the support ring.

[0021] Figure 7 yes Figure 1 The second structural diagram of the support ring.

[0022] Figure 8 yes Figure 1 The first structural diagram of the upper plate.

[0023] Figure 9 yes Figure 1 The second structural diagram of the upper plate.

[0024] Figure 10 yes Figure 3 A schematic diagram of the first structure of the support ring and upper plate at the locking position.

[0025] Figure 11 yes Figure 3 The second structural diagram of the support ring and upper plate at the locking position.

[0026] Figure 12 Show Figure 3 The three locking positions are engaged.

[0027] Figure 13 This is an assembly diagram of the upper plate of a large-angle manual seat folding mechanism according to another preferred embodiment of the present invention.

[0028] Figure 14 The diagram shows three engagement points of the locking position of a large-angle manual seat folding mechanism according to yet another preferred embodiment of the invention.

[0029] Figure 15 This is an assembly diagram of the upper plate of a large-angle manual seat folding mechanism according to another preferred embodiment of the present invention. Detailed Implementation

[0030] The preferred embodiments of the present invention are given below with reference to the accompanying drawings and described in detail.

[0031] like Figure 1 As shown, a large-angle manual seat folding mechanism according to a preferred embodiment of the present invention includes a support ring 71 and an adjuster 11, wherein the support ring 71 is connected to and remains stationary with the adjuster 11. In this embodiment, the support ring 71 and the adjuster 11 are fixedly connected by full-circle laser welding, projection welding, or arc welding, and the welding position 71a is as follows. Figure 2 As shown.

[0032] like Figure 1As shown, the large-angle manual seat folding mechanism according to this embodiment also includes an upper plate 74, which rotates around the support ring 71 between the support ring 71 and the adjuster 11. Figures 3-5 As shown, the upper plate 74 can be folded up to a maximum of 180° from the locked state, meeting the requirements for large-angle folding. It should be understood that the overall locking and unlocking principle of this manual seat folding mechanism is similar to that of CN105026205B, and will not be described in detail here. The angle adjuster 11 involved is omitted in the following figures and descriptions for better understanding of the present invention.

[0033] like Figure 6 As shown, the support ring 71 has an annular portion 711 and a flange portion 712, wherein the annular portion 711 extends axially to support the upper plate 74, and the flange portion 712 extends radially outward from the end edge of the annular portion 711. In particular, the annular portion 711 has a first arcuate bulge 711a, which protrudes radially outward from the cylindrical outer surface of the annular portion 711.

[0034] like Figure 7 As shown, the flange portion 712 of the support ring 71 has a second arcuate bulge 712a, which protrudes radially outward from the cylindrical outer surface of the flange portion 712. Additionally, the flange portion 712 also has an arcuate elongated segment 712b, which is directly integrated into the cylindrical outer surface of the flange portion 712. That is, the arcuate elongated segment 712b does not protrude axially or radially from the flange portion 712.

[0035] In this embodiment, the first arcuate convex hull 711a, the second arcuate convex hull 712a, and the arcuate long segment 712b are separately disposed from the main body of the support ring 71. It should be understood that it is also feasible to dispose of them as a single unit.

[0036] like Figure 8 As shown, the upper plate 74 has a central through hole 74a, and the annular portion 711 of the support ring 71 is accommodated and installed within the central through hole 74a. In particular, the upper plate 74 has a first arcuate boss 741, which is formed by radially protruding inward from the cylindrical surface of the central through hole 74.

[0037] like Figure 9 As shown, the upper plate 74 has a second arcuate boss 742, which protrudes axially forward and radially inward from the plate body of the upper plate 74 near the central through hole 74a. In addition, the upper plate 74 also has a long arcuate protrusion 743, which similarly protrudes axially forward and radially inward from the plate body of the upper plate 74 near the central through hole 74a.

[0038] In this embodiment, the first arc-shaped boss 741 and the upper plate 74 are separate components. It should be understood that it is also feasible to integrate them as a single unit.

[0039] In this embodiment, the second arc-shaped boss 742 and the long arc-shaped protrusion 743 are integrally formed with the plate body of the upper plate 74. It should be understood that it is also feasible to form them separately.

[0040] like Figures 10-11 As shown, in the locked state, the first arcuate boss 741 of the upper plate 74 engages with the first arcuate protrusion 711a of the annular portion 711 of the support ring 71; the second arcuate boss 742 of the upper plate 74 engages with the second arcuate protrusion 712a of the flange portion 712 of the support ring 71; and the long arcuate protrusion 743 of the upper plate 74 engages with the long arcuate segment 712b of the flange portion 712 of the support ring 71. These three components mesh one-to-one. Although all three involve two arcuate segments meshing, due to manufacturing tolerances, the actual contact point is a single point. Figure 12 As shown, the meshing point of the second arcuate convex 712a and the second arcuate boss 742 is point A; the meshing point of the long arcuate segment 712b and the long arcuate convex segment 743 is point B; and the meshing point of the first arcuate convex 711a and the first arcuate boss 741 is point C. It should be understood that the three meshing points ABC are spaced 120° apart from the rotation center of the upper plate 74, similar to the principle of a three-jaw chuck, which relatively fixes the rotation center of the upper plate 74, eliminating the hole-shaft gap between the upper plate 74 and the support ring 71.

[0041] Points A and B are on the front of the upper plate 74, and point C is on the back of the upper plate 74. That is, points A and B are coplanar, and point C is on a separate plane (opposite to the planes where points A and B are located). During the unlocking and flipping process, since AB and C are independent of each other, the first arc convex hull 711a does not interfere with the upper plate 74, so the upper plate 74 can be folded at a large angle, up to a maximum of 180°, which can be applied to various applications with different folding angles.

[0042] like Figure 13 As shown, the large-angle manual seat folding mechanism according to another preferred embodiment of the present invention further includes an open-ended protruding ring 99, which is fixed to the upper plate 74, for example, by welding or riveting. Specifically, the opposite ends 99a and 99b of the open-ended protruding ring 99 respectively perform the functions of the second arcuate boss 742 and the long arcuate protrusion 743 of the previous embodiment, that is, the second arcuate boss 742 and the long arcuate protrusion 743 of the previous embodiment are integrated into the newly added open-ended protruding ring 99. The remaining parts are the same as in the previous embodiment and will not be described again here.

[0043] like Figure 14 As shown, in another preferred embodiment of the present invention, point A of the large-angle manual seat folding mechanism is on the front of the upper plate 74, and points B and C are on the back of the upper plate 74, that is, points B and C are coplanar, and point A is on a separate surface (offset from the surface where points B and C are located). The rest is the same as in the previous embodiment, and will not be described again here.

[0044] like Figure 15 As shown, the large-angle manual seat folding mechanism according to another preferred embodiment of the present invention further includes a protrusion 100, which is fixed to the upper plate 74, for example, by welding or riveting. In particular, the end 100a of the protrusion 100 performs the function of point A in the previous embodiment, that is, point A on the front of the upper plate 74 in the previous embodiment is integrated into the newly added protrusion 100. The rest is the same as in the previous embodiment and will not be described again here.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. Various variations can be made to the above embodiments of the present invention. That is, all simple and equivalent changes and modifications made based on the claims and description of this invention fall within the protection scope of the claims of this patent. All aspects not described in detail in this invention are conventional technical content.

Claims

1. A large-angle manual seat folding mechanism, characterized in that, The manual seat folding mechanism includes a support ring and an upper plate rotatable around the support ring. The support ring has a first arcuate protrusion, a second arcuate protrusion, and an arcuate long section spaced apart from each other. The upper plate has a first arcuate boss, a second arcuate boss, and an arcuate long section spaced apart from each other. In the locked state, the first arcuate boss and the first arcuate protrusion engage at a first engagement point, the second arcuate boss and the second arcuate protrusion engage at a second engagement point, and the arcuate long section engages with the arcuate long section at a third engagement point. The first and second engagement points are located on the front of the upper plate, and the third engagement point is located on the back of the upper plate, or the first engagement point is located on the front of the upper plate, and the second and third engagement points are located on the back of the upper plate.

2. The manual seat folding mechanism according to claim 1, characterized in that, The upper plate has a central through hole, and the support ring has an annular portion and a flange portion, wherein the annular portion extends axially to be accommodated in the central through hole for installation, and the flange portion extends radially outward from the end edge of the annular portion.

3. The manual seat folding mechanism according to claim 2, characterized in that, The first arc convex bulge is formed by radially protruding outward from the cylindrical outer surface of the annular portion, and the first arc boss is formed by radially protruding inward from the cylindrical surface of the central through hole.

4. The manual seat folding mechanism according to claim 2, characterized in that, The second arc-shaped protrusion is formed by radially protruding outward from the outer surface of the cylinder of the flange portion, and the second arc-shaped boss is formed by axially protruding forward and radially inward from the upper plate near the central through hole.

5. The manual seat folding mechanism according to claim 2, characterized in that, The long arc segment is directly integrated into the outer cylindrical surface of the flange portion, which provides the flange portion. The long arc segment protrudes forward axially and radially inward from the upper plate near the central through hole.

6. The manual seat folding mechanism according to claim 1, characterized in that, The first, second, and third mating points are three meshing points that are 120° apart from each other relative to the rotation center of the upper plate.

7. The manual seat folding mechanism according to claim 1, characterized in that, The manual seat folding mechanism also includes an open convex ring, which is fixedly connected to the upper plate.

8. The manual seat folding mechanism according to claim 7, characterized in that, The two opposite ends of the open convex ring are directly formed into a second circular arc boss and a long circular arc convex hull.

9. The manual seat folding mechanism according to claim 7, characterized in that, The open protruding ring is fixed to the upper plate by welding or riveting.

10. The manual seat folding mechanism according to claim 1, characterized in that, The manual seat folding mechanism also includes an angle adjuster, and the support ring and the angle adjuster are connected and fixed by full-circle laser welding, projection welding or arc welding.

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