A seat structure with differentially adjustable backrest angles

Abstract

The present invention discloses a seat structure with differentially adjustable backrest angles. It includes a backrest side panel and seat cushion side panels on both sides, the backrest side panels are hinged to the seat cushion side panels and the angles are adjustable, and also includes a linkage mechanism baffle, an angle limiting mechanism is provided between the linkage mechanism baffle and the backrest side panels, the linkage mechanism baffle can move up and down relative to the seat cushion side panels, the bottom of the seat cushion side panels is driven to slide laterally by a position adjustment sliding mechanism, and a pull-wire linkage mechanism is provided between the linkage mechanism baffle and the position adjustment sliding mechanism for pulling the linkage mechanism baffle downward relative to the seat cushion side panels. The present invention has a graded backrest adjustment structure, and the range of the backrest can be adjusted as needed, so that the seat has a backrest with different adjustment ranges when in different positions, thereby providing good riding comfort.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile seats, and in particular relates to a seat structure with differentially adjustable backrest angles. Background Art

[0002] At present, the requirements for seat comfort are getting higher and higher. Especially when the seat integrates functions such as front and rear adjustment, lateral adjustment, and backrest adjustment, the matching of the seat and the body parts is becoming more and more complicated.

[0003] When designing the adjustment range of the car seat backrest, the adjustment range is usually determined based on the worst case matching of the body parts. For example, if the seat is adjusted backward in certain positions, it will interfere with certain parts in the car, which will directly reduce the adjustment range of the seat backrest. When the seat is in other positions, it should be able to adjust backward to a large angle, but due to the above considerations, this function is not available, which greatly affects the riding comfort.

[0004] For example, patent CN108556697B discloses a "seat with graded backrest adjustment structure", which has the following disadvantages:

[0005] The backrest frame rotates relative to the seat cushion frame around the pivot axis, the seat cushion frame is slidably supported on the base, the seat cushion frame slides between at least a first position and a second position, the adjustment structure has a backrest trigger fixedly connected to the backrest frame and a linkage mechanism baffle movably connected to the seat cushion frame, the backrest trigger has an inwardly protruding stop portion; when the seat cushion frame is in the first position, the linkage mechanism baffle contacts the stop portion to limit the first pivot range of the backrest frame relative to the seat cushion frame; when the seat cushion frame is in the second position, the linkage mechanism baffle cannot contact the stop portion to limit the second pivot range of the backrest frame relative to the seat cushion frame.

[0006] Specifically, there are the following disadvantages:

[0007] (1) The roller and the flange are always in contact during the movement, which not only affects the lateral sliding force of the seat, but also causes friction and abnormal noise, affecting the riding experience.

[0008] (2) The position of the linkage mechanism baffle is limited by the thrust cap. This limiting method has the risk of the thrust cap becoming loose after repeated use of the mechanism or after the linkage mechanism baffle is impacted by the stop point on the backrest, due to the poor strength of the thrust cap itself, which may cause the mechanism to fail. In serious cases, when the thrust cap becomes loose, the entire linkage mechanism baffle may fall off the seat.

[0009] (3) When the roller leaves the first position of the flange and starts to contact the second section of the flange, even if it has not reached the second position, the backrest is subjected to a large impact force and there is a risk that the blocking piece of the linkage mechanism will be pressed down, so that the backrest can pass the blocking point and be adjusted into the second pivot range. When the seat cushion frame reaches the second position, the mechanism function takes effect. Summary of the invention

[0010] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide a seat structure with differential adjustment of backrest angles.

[0011] The technical solution adopted by the present invention is: a seat structure with differentially adjustable backrest angles, comprising backrest side panels and seat cushion side panels on both sides, the backrest side panels being hinged to the seat cushion side panels and having adjustable angles, and also comprising a linkage mechanism baffle, an angle limiting mechanism being arranged between the linkage mechanism baffle and the backrest side panels, the linkage mechanism baffle being able to move up and down relative to the seat cushion side panels, the bottom of the seat cushion side panels being driven to slide laterally by a position adjustment sliding mechanism, a pull-wire linkage mechanism being arranged between the linkage mechanism baffle and the position adjustment sliding mechanism for pulling the linkage mechanism baffle downward relative to the seat cushion side panels; when the seat cushion side panels on both sides are in the initial position, the The angle limiting mechanism is limited, and the adjustable angle range between the backrest side panels and the seat cushion side panels is α. When the seat cushion side panels on both sides slide laterally a distance L1 to a first position, the angle limiting mechanism is limited, and the linkage mechanism baffle remains in place. When the seat cushion side panels on both sides slide laterally a distance L2 to a second position, the pull-wire linkage mechanism generates an effective displacement L2-L1, the angle limiting mechanism is not limited, the linkage mechanism baffle moves downward by L2-L1, and the adjustable angle range between the backrest side panels and the seat cushion side panels is β, and the angle of β is greater than α. A return mechanism is provided between the linkage mechanism baffle and the seat cushion side panels.

[0012] In a further preferred structure, the angle limiting mechanism comprises a linkage limiting piece fixedly connected to the upper part of the linkage mechanism baffle and a backrest baffle arranged on the backrest side plate, and the linkage limiting piece contacts and limits the backrest baffle.

[0013] In a further preferred structure, the position adjustment sliding mechanism comprises a side slide rail movable rail and a side slide rail fixed rail, and the side slide rail movable rail is slidably connected to the side slide rail fixed rail.

[0014] A further preferred structure is that the wire pulling linkage mechanism includes a wire pulling and a wire pulling anti-loosening spring, the linkage mechanism baffle is connected to one end of the wire pulling, the other end of the wire pulling is connected to one end of the wire pulling anti-loosening spring, the other end of the wire pulling anti-loosening spring is fixed on the side slide rail fixed rail, a wire pulling fixing bracket is fixed on the side slide rail moving rail, a wire pulling guide bracket is fixed on the side slide rail fixed rail, and the wire pulling is inserted into the wire pulling fixing bracket and the wire pulling guide bracket.

[0015] A further preferred structure is that the lower part of the linkage mechanism baffle is fixedly connected to the downward pressure limit bracket, and when the seat cushion side panels on both sides slide a distance L1 to the first position, the downward pressure limit bracket is contacted and limitedly connected with the flange bracket; a notch is provided on the flange bracket, and when the seat cushion side panels on both sides slide a distance L2 to the second position, the downward pressure limit bracket is located in the notch of the flange bracket.

[0016] A further preferred structure is that the inner side of the seat cushion side panel is fixedly connected to two upper and lower step bolts, a waist-shaped hole is opened on the linkage mechanism baffle plate, the step bolt passes through the waist-shaped hole, and is tightened by a limit nut, the return mechanism is located between the step bolt and the linkage mechanism baffle plate, and the linkage mechanism baffle plate can move up and down relative to the seat cushion side panel through the waist-shaped hole.

[0017] A further preferred structure is that when the seat cushion side panels on both sides slide laterally a distance L1 to a first position, the end of the pull wire connected to the pull wire anti-loosening spring contacts the pull wire guide bracket, and when the seat cushion side panels on both sides slide laterally a distance L2 to a second position, the pull wire pulls the linkage mechanism baffle to move downward by a displacement of L2-L1.

[0018] In the present invention, L1 is the ineffective distance of the cable (i.e., the distance between the end of the cable connected to the cable anti-loosening spring and the cable guide bracket in the initial position), and L2 is the maximum displacement of the moving rail of the side slide rail.

[0019] In a further preferred structure, the value range of L1 is 60-80 mm; the value range of L2 is 70-90 mm.

[0020] In a further preferred structure, the angle α is 20°.

[0021] In a further preferred structure, a side slide rail fixing wrapping bracket is provided at the bottom of the side slide rail fixing rail; and the flanging bracket is fixedly connected to the side surface of the side slide rail fixing wrapping bracket.

[0022] In a further preferred structure, the return mechanism is a linkage mechanism return spring.

[0023] The beneficial effects of the present invention are:

[0024] (1) The present invention has a graded adjustment structure for the backrest, which can adjust the range of the backrest as needed, so that the seat has a backrest with different adjustment ranges when in different positions, thereby providing good riding comfort;

[0025] (2) The roller is eliminated, so that the moving parts and the fixed parts are always separated during the lateral sliding of the seat, which will not affect the lateral sliding force of the seat and will not cause friction and abnormal noise problems;

[0026] (3) Instead of using a thrust cap to limit the linkage mechanism baffle, a stepped bolt + nut is used to limit the linkage mechanism baffle. Compared with a pin shaft + thrust cap, a bolt + nut has better locking performance and stability, which can effectively improve the above risks;

[0027] (4) Instead of using a roller and two flanges to achieve the graded adjustment function of the backrest, a pull-wire method is used to control the position of the graded adjustment function of the backrest through the pull-wire travel, which is simple, convenient, accurate and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram showing that the seat backrest can only be adjusted backwards to a small angle before sliding sideways;

[0030] Figure 3 This is a schematic diagram showing that the seat backrest can be adjusted backwards to a large angle after sliding sideways;

[0031] Figure 4 It is a schematic diagram of the structure of the present invention;

[0032] Figure 5 This is a schematic diagram of the connection between the backrest side panel and the seat cushion side panel of the present invention;

[0033] Figure 6 This is a schematic diagram of the state of the pull wire and the pull wire anti-loosening spring before the seat slides sideways;

[0034] Figure 7 It is a schematic diagram of the position state of the seat lateral sliding front linkage mechanism baffle;

[0035] Figure 8 This is a schematic diagram of the state of the pull wire and the pull wire anti-loosening spring after the seat slides sideways;

[0036] Fig. 9 is a schematic diagram of the position state of the linkage mechanism baffle after the seat slides sideways;

[0037] Fig.10 Schematic diagram of the positional relationship between the seat side sliding front / rear downward pressure limit bracket and the flange bracket.

[0038] Among them, 1-backrest side panel, 2-backrest baffle, 3-seat cushion side panel, 4-linkage mechanism return spring, 5-flange bracket (5-1-notch), 6-linkage mechanism limit plate, 7-step bolt, 8-limit nut, 9-linkage mechanism baffle (9-1-waist-shaped hole), 10-downward pressure limit bracket, 11-side slide rail moving rail, 12-pull wire fixing bracket, 13-pull wire guide bracket, 14-pull wire, 15-pull wire anti-loosening spring, 16-spring bracket, 17-side slide rail fixing rail, 18-side slide rail fixing rail wrapping bracket. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not constitute a limitation on the present invention.

[0040] like Figure 1 , Figure 4 As shown, the present invention comprises a backrest side panel 1 and seat cushion side panels 3 on both sides, wherein the backrest side panel 1 is hinged to the seat cushion side panel 3 and the angle is adjustable, and further comprises a linkage mechanism baffle 9, wherein an angle limiting mechanism is arranged between the linkage mechanism baffle 9 and the backrest side panel 1, wherein the linkage mechanism baffle 9 can move up and down relative to the seat cushion side panel 3, wherein the bottom of the seat cushion side panel 3 is driven to slide laterally by a position adjustment sliding mechanism, and a pull-wire linkage mechanism for pulling the linkage mechanism baffle 9 downward relative to the seat cushion side panel 3 is arranged between the linkage mechanism baffle 9 and the position adjustment sliding mechanism; Figure 2 , Figure 6 , Figure 7 As shown, when the cushion side panels 3 on both sides are in the initial position, the angle limiting mechanism is limited, and the adjustable angle range between the backrest side panels 1 and the cushion side panels 3 is α. When the cushion side panels 3 on both sides slide laterally by a distance L1 to the first position, the angle limiting mechanism is limited, and the linkage mechanism baffle 9 remains in place. Figure 3 , Figure 8 , Fig. 9 As shown, when the seat cushion side panels 3 on both sides slide laterally a distance L2 to the second position, the pull-wire linkage mechanism generates an effective displacement L2-L1, the angle limiting mechanism is not limited, the linkage mechanism baffle 9 moves downward by L2-L1, and the adjustable angle range between the backrest side panel 1 and the seat cushion side panel 3 is β, and the angle of β is greater than α; a return mechanism is provided between the linkage mechanism baffle 9 and the seat cushion side panel 3.

[0041] like Figure 5 As shown, the angle limiting mechanism includes a linkage limiting piece 6 fixedly connected to the upper part of the linkage mechanism blocking piece 9 and a backrest blocking piece 2 arranged on the backrest side plate 1, and the linkage limiting piece 6 contacts and limits the backrest blocking piece 2.

[0042] The position adjustment sliding mechanism comprises a side sliding rail movable rail 11 and a side sliding rail fixed rail 17 , and the side sliding rail movable rail 11 is slidably connected to the side sliding rail fixed rail 17 .

[0043] The wire pulling linkage mechanism includes a wire pulling 14 and a wire pulling anti-loosening spring 15, the linkage mechanism baffle 9 is connected to one end of the wire pulling 14, the other end of the wire pulling 14 is connected to one end of the wire pulling anti-loosening spring 15, the other end of the wire pulling anti-loosening spring 15 is fixed on the side slide rail fixed rail 17 (through the spring bracket 16), the wire pulling fixing bracket 12 is fixed on the side slide rail movable rail 11, the wire pulling guide bracket 13 is fixed on the side slide rail fixed rail 17, and the wire pulling 14 is inserted into the wire pulling fixing bracket 12 and the wire pulling guide bracket 13.

[0044] like Fig.10 As shown, the lower part of the linkage mechanism baffle 9 is fixedly connected to the downward pressure limit bracket 10. When the seat cushion side panels 3 on both sides slide a distance L1 to the first position, the downward pressure limit bracket 10 is contacted and limitedly connected with the flange bracket 5. A notch 5-1 is provided on the flange bracket 5. When the seat cushion side panels 3 on both sides slide a distance L2 to the second position, the downward pressure limit bracket 10 is located in the notch 5-1 of the flange bracket 5.

[0045] The inner side of the cushion side panel 3 is fixedly connected to the upper and lower step bolts 7. A waist-shaped hole 9-1 is provided on the linkage mechanism baffle 9 to pass the step bolt 7 through and is tightened by a limit nut 8. The return mechanism is located between the step bolt 7 and the linkage mechanism baffle 9. The linkage mechanism baffle 9 can move up and down relative to the cushion side panel 3 through the waist-shaped hole 9-1.

[0046] When the seat cushion side panels 3 on both sides slide laterally a distance L1 to a first position, the end of the pull wire 14 connected to the pull wire anti-loosening spring 15 contacts the pull wire guide bracket 13. When the seat cushion side panels 3 on both sides slide laterally a distance L2 to a second position, the pull wire 14 pulls the linkage mechanism baffle 9 downwardly to a displacement of L2-L1.

[0047] The value range of L1 is 60-80 mm; the value range of L2 is 70-90 mm.

[0048] The α is 20°.

[0049] A side sliding rail fixing and wrapping bracket 18 is provided at the bottom of the side sliding rail fixing and wrapping bracket 17; the flanging bracket 5 is fixedly connected to the side of the side sliding rail fixing and wrapping bracket 18.

[0050] The return mechanism is a linkage mechanism return spring 4 .

[0051] The present invention realizes that the backrest can be adjusted to different angles when the seat is in different positions through the cooperation of the pull wire 14, the flange bracket 5, and the linkage mechanism baffle 9;

[0052] The present invention realizes the differential conversion between the lateral sliding distance of the seat and the effective displacement of the cable under the premise that the cable 14 is not loosened by cooperating with the cable anti-loosening spring 15 and the cable guide bracket 13;

[0053] The present invention achieves that the moving part and the fixed part never contact each other during the lateral sliding of the seat by pulling the linkage mechanism baffle 9 with a pull wire and setting the longitudinal length of the flange of the flange bracket 5, thereby effectively avoiding the problems of friction noise and large sliding resistance.

[0054] The seat (the cushion side panels 3 on both sides) drives the pull wire 14 to move sideways. Before the end of the pull wire 14 contacts the pull wire guide bracket 13, the pull wire does not produce effective displacement, that is, the pull wire cannot pull the linkage mechanism limit plate 6 downward. When the seat slides to L1, the end of the pull wire contacts the pull wire guide bracket 13. Thereafter, the seat continues to slide sideways to L2. In the L2-L1 interval, the pull wire 14 produces an effective displacement of L2-L1. The pull wire 14 pulls the linkage mechanism limit plate 6 downward by L2-L1. At this time, the linkage mechanism limit plate 6 is no longer in contact with the backrest baffle 2 for limitation, and the adjustable angle range between the seat and the backrest side panel 1 is increased.

[0055] When the linkage mechanism limiting piece 6 is pulled downward by the pull wire 14, the linkage mechanism limiting piece 6 on the seat frame is separated from the backrest blocking piece 2 on the backrest on the movement path, and the backrest can continue to rotate.

[0056] In the lateral sliding range 0-L1, if the backrest is subjected to impact force, the downward pressure limit bracket 10 moves downward, and the downward pressure limit bracket 10 cannot continue to move downward after contacting the flange bracket 5. That is, when the backrest is subjected to impact, the mechanism can still ensure the effective realization of the function.

[0057] By adjusting the length of the pull wire 14 and the longitudinal length of the flange of the flange bracket 5, it can be achieved that the triggering starts at the specified position in the lateral direction, and the linkage mechanism baffle 9 starts to move down at the specified position (notch 5-1).

[0058] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A seat structure with differentially adjustable backrest angles, comprising a backrest side panel (1) and seat cushion side panels (3) on both sides, wherein the backrest side panel (1) and the seat cushion side panel (3) are hingedly connected and the angles are adjustable, and characterized in that: The seat cushion seat also comprises a linkage mechanism baffle (9), an angle limiting mechanism is arranged between the linkage mechanism baffle (9) and the backrest side plate (1), the linkage mechanism baffle (9) can move up and down relative to the seat cushion side plate (3), the bottom of the seat cushion side plate (3) is driven to slide laterally by a position adjustment sliding mechanism, and a pull-wire linkage mechanism is arranged between the linkage mechanism baffle (9) and the position adjustment sliding mechanism for pulling the linkage mechanism baffle (9) downward relative to the seat cushion side plate (3); when the seat cushion side plates (3) on both sides are in the initial position, the angle limiting mechanism is limited, and the angle between the backrest side plate (1) and the seat cushion side plate (3) is adjusted. The adjustable angle range is α. When the cushion side panels (3) on both sides slide laterally by a distance L1 to a first position, the angle limiting mechanism limits the position, and the linkage mechanism baffle (9) remains in place. When the cushion side panels (3) on both sides slide laterally by a distance L2 to a second position, the pull-wire linkage mechanism generates an effective displacement of L2-L1, the angle limiting mechanism does not limit the position, and the linkage mechanism baffle (9) moves downward by L2-L1. The adjustable angle range between the backrest side panels (1) and the cushion side panels (3) is β, and the angle of β is greater than α. A return mechanism is provided between the linkage mechanism baffle (9) and the cushion side panels (3). The angle limiting mechanism comprises a linkage limiting piece (6) fixedly connected to the upper part of the linkage mechanism blocking piece (9) and a backrest blocking piece (2) arranged on the backrest side plate (1), wherein the linkage limiting piece (6) contacts and limits the backrest blocking piece (2); The position adjustment sliding mechanism comprises a side sliding rail movable rail (11) and a side sliding rail fixed rail (17), wherein the side sliding rail movable rail (11) is slidably connected to the side sliding rail fixed rail (17); The wire pulling linkage mechanism comprises a wire pulling (14) and a wire pulling anti-loosening spring (15); the linkage mechanism baffle (9) is connected to one end of the wire pulling (14); the other end of the wire pulling (14) is connected to one end of the wire pulling anti-loosening spring (15); the other end of the wire pulling anti-loosening spring (15) is fixed on the side slide rail fixed rail (17); a wire pulling fixing bracket (12) is fixed on the side slide rail movable rail (11); a wire pulling guide bracket (13) is fixed on the side slide rail fixed rail (17); the wire pulling (14) is passed through the wire pulling fixing bracket (12) and the wire pulling guide bracket (13).

2. A seat structure with differentially adjustable backrest angles according to claim 1, characterized in that: The lower part of the linkage mechanism baffle (9) is fixedly connected to a downward pressure limit bracket (10); when the seat cushion side panels (3) on both sides slide a distance L1 to a first position, the downward pressure limit bracket (10) is contacted and limitedly connected with the flange bracket (5); a notch (5-1) is provided on the flange bracket (5); when the seat cushion side panels (3) on both sides slide a distance L2 to a second position, the downward pressure limit bracket (10) is located in the notch (5-1) of the flange bracket (5).

3. The seat structure with differentially adjustable backrest angle according to claim 1, characterized in that: The inner side of the seat cushion side plate (3) is fixedly connected to two upper and lower step bolts (7); a waist-shaped hole (9-1) is provided on the linkage mechanism baffle (9) through which the step bolt (7) passes and is tightened by a limit nut (8); the return mechanism is located between the step bolt (7) and the linkage mechanism baffle (9); and the linkage mechanism baffle (9) can move up and down relative to the seat cushion side plate (3) through the waist-shaped hole (9-1).

4. The seat structure with differentially adjustable backrest angle according to claim 1, characterized in that: When the cushion side panels (3) on both sides slide laterally a distance L1 to a first position, the end of the pull wire (14) connected to the pull wire anti-loosening spring (15) contacts the pull wire guide bracket (13); when the cushion side panels (3) on both sides slide laterally a distance L2 to a second position, the pull wire (14) pulls the linkage mechanism baffle (9) downward to move a displacement of L2-L1.

5. A seat structure with differentially adjustable backrest angles according to claim 1, 2 or 4, characterized in that: The value range of L1 is 60-80 mm; the value range of L2 is 70-90 mm.

6. The seat structure with differentially adjustable backrest angle according to claim 2, characterized in that: A side slide rail fixing and wrapping bracket (18) is provided at the bottom of the side slide rail fixing and wrapping bracket (17); the flange bracket (5) is fixedly connected to the side of the side slide rail fixing and wrapping bracket (18).

7. A seat structure with differentially adjustable backrest angles according to claim 1 or 3, characterized in that: The return mechanism is a linkage mechanism return spring (4).

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