Seat cushion lifting mechanism of a seat, seat and vehicle

Abstract

The present invention relates to the technical field of seats, and specifically provides a seat cushion lifting mechanism, a seat and a vehicle for a seat. To solve the problems of inconvenient adjustment and high cost of the existing seat cushion lifting mechanism, the seat of the present invention includes a seat pan structure, and the seat cushion lifting mechanism includes a base, a driving flap, a cable, a rotating bracket and a lifting rod; the base is fixed on the seat pan structure, the driving flap is rotatably arranged on the base, the rotating bracket is rotatably arranged on the seat pan structure, the end of the lifting rod is connected to the rotating bracket, one end of the cable is connected to the driving flap, and the other end is connected to the rotating bracket; when the driving flap rotates, the rotating bracket is pulled by the cable to rotate so that the lifting rod moves up and down. The cable of the present invention utilizes the pulling force of the electric backrest reclining backward to pull the rear part of the seat cushion up, eliminating the need for an independent driving device and the user's manual adjustment steps. The seat cushion is automatically flush with the height of the backrest, saving the installation cost and improving the adjustment efficiency of the seat cushion.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle seats, and particularly provides a seat cushion lifting mechanism, a seat and a vehicle for a seat. Background Art

[0002] A vehicle seat is an important safety component and a component for providing comfort in a vehicle. As people have put forward higher requirements for the comfort of vehicle seats, there has emerged on the market a partial seat cushion rear lifting mechanism driven independently by a motor, which is used to make up for the height difference between the seat cushion and the backrest when the backrest lies flat, so that the overall seat fits the human body better. However, since the existing seat cushion rear lifting mechanism not only has a complex structure, and correspondingly the cost of the seat is relatively high, but also requires manual adjustment by the user to complete the corresponding operation to make the heights of the seat cushion and the backrest flush, which greatly reduces the user experience.

[0003] Correspondingly, there is a need in the art for a new seat cushion lifting mechanism for a vehicle seat to solve the problems of inconvenient adjustment and relatively high cost of the existing seat cushion lifting mechanism. Summary of the Invention

[0004] The present invention aims to solve the above technical problems, that is, to solve the problems of inconvenient adjustment and relatively high cost of the existing seat cushion lifting mechanism.

[0005] In a first aspect, the present invention provides a seat cushion lifting mechanism for a seat, the seat includes a seat pan structure, and the seat cushion lifting mechanism of the seat includes a base, a driving flap, a cable, a rotating bracket and a lifting rod;

[0006] The base is fixedly arranged on the seat pan structure;

[0007] The driving flap is rotatably arranged on the base;

[0008] The rotating bracket is rotatably arranged on the seat pan structure, one end of the cable is connected to the driving flap, the other end is connected to the rotating bracket, and the lifting rod is connected to the rotating bracket; when the driving flap rotates, the rotating bracket is pulled to rotate through the cable so that the lifting rod moves up and down.

[0009] In a preferred technical solution of the above seat cushion lifting mechanism for a seat, the seat cushion lifting mechanism of the seat further includes a driven flap and a torsion spring, the driven flap is rotatably arranged on the base, and two ends of the torsion spring are respectively connected to the driven flap and the driving flap.

[0010] In the preferred technical solution of the seat cushion lifting mechanism of the above-mentioned seat, the seat cushion lifting mechanism of the seat further includes a torsion spring bracket, the torsion spring bracket is fixed on the passive retaining piece, the torsion spring is sleeved on the torsion spring bracket, one end of the torsion spring is connected to the torsion spring bracket, and the other end is connected to the active retaining piece.

[0011] In the preferred technical solution of the seat cushion lifting mechanism of the above-mentioned seat, a limiting tongue is provided on the passive retaining piece, and a first limiting hole and a second limiting hole corresponding to the limiting tongue are respectively provided on the base and the active retaining piece. When the active retaining piece rotates, the limiting tongue can move back and forth in the first limiting hole and the second limiting hole; and / or, the torsion spring and the cable are arranged such that the deformation force of the torsion spring is less than the ultimate failure tension of the cable.

[0012] In the preferred technical solution of the seat cushion lifting mechanism of the above-mentioned seat, the rotating bracket includes an outer rotating bracket, an inner rotating bracket and a seat pan rotating shaft. The seat pan rotating shaft is rotatably arranged on the seat pan structure. The outer rotating bracket and the inner rotating bracket are fixed on the seat pan rotating shaft. The cable is connected to the outer rotating bracket, and the lifting rod is connected to the inner rotating bracket.

[0013] In the preferred technical solution of the seat cushion lifting mechanism of the above-mentioned seat, the inner rotating bracket is provided with a first limiting portion, and a second limiting portion corresponding to the first limiting portion is provided on the seat pan structure. After the inner rotating bracket rotates in place, it is limited by the first limiting portion and the second limiting portion.

[0014] In the preferred technical solution of the seat cushion lifting mechanism of the above-mentioned seat, a first return elastic member is connected between the base and the active retaining piece; and / or, a second return elastic member is connected between the rotating bracket and the seat pan structure.

[0015] In the preferred technical solution of the seat cushion lifting mechanism of the above-mentioned seat, a cable fixing hole is provided on the base, and the cable passes through the cable fixing hole.

[0016] The present invention also provides a seat, and the seat includes the seat cushion lifting mechanism of any one of the above technical solutions.

[0017] The present invention also provides a vehicle, and the vehicle includes the seat cushion lifting mechanism of any one of the above technical solutions.

[0018] Those skilled in the art can understand that the seat of the present invention includes a seat pan structure, and the seat cushion lifting mechanism includes a base, a driving flap, a cable, a rotating bracket, and a lifting rod; the base is fixed on the seat pan structure, the driving flap is rotatably arranged on the base, the rotating bracket is rotatably arranged on the seat pan structure, the lifting rod is connected to the rotating bracket, one end of the cable is connected to the driving flap, and the other end is connected to the rotating bracket; when the driving flap rotates, the rotating bracket is pulled by the cable to rotate so that the lifting rod moves up and down.

[0019] In the case of adopting the above technical solution, the base of the seat cushion lifting mechanism of the present invention is fixed on the seat pan structure and does not move. When the electric backrest is reclined backward to a certain angle, the backrest contacts the driving flap, so that the driving flap rotates as the backrest is pushed. At the same time, the cable pulls the rotating bracket to rotate. When the rotating bracket rotates relative to the seat pan structure, the lifting rod rotates upward following the rotating bracket, and then the rear part of the seat cushion can be lifted, reducing the height difference between the rear part of the seat cushion and the backrest. The seat cushion lifting mechanism of the present invention can be linked with the electric backrest. The cable uses the pulling force when the electric backrest reclines backward to pull the rear part of the seat cushion to rise, which can not only save an independent driving device but also eliminate the manual adjustment step of the user. Through the optimized design of the structure, when the electric backrest reclines in place, the height of the seat cushion automatically levels with it, and the adjustment of the seat cushion height is achieved in one step. This not only reduces the independent driving device, saves production and installation costs, but also greatly improves the adjustment efficiency of the seat cushion. Brief Description of the Drawings

[0020] The following describes the preferred embodiments of the present invention with reference to the drawings, in which:

[0021] Figure 1 is an exploded view of the seat cushion lifting mechanism of the seat of the present invention;

[0022] Figure 2 is a structural view of the seat cushion lifting mechanism of the seat of the present invention at a first angle;

[0023] Figure 3 is a structural view of the seat cushion lifting mechanism of the seat of the present invention at a second angle;

[0024] Figure 4 is a cross-sectional view of the seat cushion lifting mechanism of the seat of the present invention;

[0025] Figure 5 is a structural view of the base of the seat cushion lifting mechanism of the seat of the present invention;

[0026] Figure 6 is a structural view of the driving flap of the seat cushion lifting mechanism of the seat of the present invention;

[0027] Figure 7 is a structural view of the driven flap and the spring holder of the seat cushion lifting mechanism of the seat of the present invention;

[0028] Figure 8 It is a structural diagram of the torsion spring of the seat cushion lifting mechanism of the present invention;

[0029] Figure 9 It is a structural diagram of the inner rotating bracket of the seat cushion lifting mechanism of the present invention;

[0030] Figure 10 It is a schematic cross-sectional view of the lifting rod of the seat cushion lifting mechanism of the present invention at the lowest position;

[0031] Figure 11 It is a schematic cross-sectional view of the lifting rod of the seat cushion lifting mechanism of the present invention at the highest position.

[0032] List of reference numerals:

[0033] 1. Base; 1a. Flange; 1b. First limiting hole; 1c. Cable fixing hole; 2. Active retaining piece; 2a. Protrusion; 2b. Second limiting hole; 2c. First limiting groove; 3. Passive retaining piece; 3a. Limiting tongue; 3b. First mounting hole; 4. Torsion spring bracket; 4a. Second limiting groove; 5. Torsion spring; 5a. First bend; 5b. Second bend; 6. Cable; 6a. Hook; 7. Outer rotating bracket; 7a. First rotating shaft hole; 8. Inner rotating bracket; 8a. Second rotating shaft hole; 8b. Third limiting hole; 9. Lifting rod; 10. First return elastic member; 11. Second return elastic member;

[0034] 1'. Seat basin structure; Y1. Backrest rotation axis; Y2. Seat basin rotation axis. Detailed implementation manners

[0035] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios. For example, although this application is described in conjunction with a vehicle, where the vehicle can be an electric vehicle or a fuel vehicle, this is not restrictive. The seat cushion lifting mechanism of the present invention can be applied to other vehicles or other devices that require seats outside the vehicle.

[0036] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Referring to Figure 1 and Figure 4 , to solve the problems of insufficient layout space and high cost of the seat cushion lifting mechanism of the existing vehicle seat, the seat of the present invention includes a seat pan structure 1', and the seat cushion lifting mechanism includes a base 1, a driving flap 2, a cable 6, a rotating bracket and a lifting rod 9; the base 1 is fixed on the seat pan structure 1', the driving flap 2 is rotatably arranged on the base 1, the rotating bracket is rotatably arranged on the seat pan structure 1', the lifting rod 9 is connected to the rotating bracket, one end of the cable 6 is connected to the driving flap 2, and the other end is connected to the rotating bracket; when the driving flap 2 rotates, the rotating bracket is pulled to rotate through the cable 6 so that the lifting rod 9 moves up and down (in the height direction of the seat).

[0039] The advantages of the above setting method are as follows: The base 1 of the seat cushion lifting mechanism of the present invention is fixedly arranged. When the electric backrest is reclined backward to a certain angle, the backrest contacts the driving flap 2, so that the driving flap 2 rotates as it is pushed by the backrest. At the same time, the cable 6 pulls the rotating bracket to rotate. When the rotating bracket rotates relative to the seat pan structure 1', the lifting rod 9 follows the rotating bracket and rotates upward, thereby being able to lift the rear part of the seat cushion and reduce the height difference between the rear part of the seat cushion and the backrest. The seat cushion lifting mechanism of the present invention can be linked with the electric backrest. The cable 6 uses the pulling force of the electric backrest reclining backward to pull the rear part of the seat cushion to rise, which can not only save an independent driving device but also eliminate the user's manual adjustment steps. Through the optimized design of the structure, when the electric backrest is reclined in place, the height of the seat cushion is automatically leveled with it, which not only saves production and installation costs but also improves the adjustment efficiency of the seat cushion, greatly improving the user experience.

[0040] Referring to Figure 1, in a possible implementation, the vehicle seat frame includes a seat pan structure 1' and a backrest structure (not shown in the figure). A rotatable backrest rotating shaft (not shown in the figure) is provided on the seat pan structure 1', and the backrest structure rotates backward or forward around the backrest rotating shaft; the seat cushion lifting mechanism is symmetrically arranged on both sides of the seat pan structure 1'.

[0041] Taking one side of the seat as an example, the seat cushion lifting mechanism will be described in detail below:

[0042] Referring to Figure 1 , the seat cushion lifting mechanism includes a base 1. The base 1 is fixed on one side of the seat pan structure 1'. A central hole is provided on the base 1, and the central hole of the base 1 is concentric with the backrest rotation axis Y1.

[0043] Continuing to refer to Figure 1 , further, the seat cushion lifting mechanism of the vehicle seat further includes a driving flap 2, a driven flap 3, a spring holder 4, a spring 5, a cable 6, an outer rotating bracket 7, an inner rotating bracket 8 and a lifting rod 9; the base 1, the driving flap 2 and the driven flap 3 are arranged coaxially.

[0044] Referring to Figure 4 , Figure 5 , further, a flange 1a extending outward (the side away from the seat in the left - right direction of the seat) is provided around the central hole of the base 1. The driving flap 2 and the driven flap 3 are rotatably arranged on the flange 1a from the inside to the outside (from the side close to the seat to the side away from the seat in the left - right direction of the seat). Further, the flange 1a includes a first flange and a second flange. One end of the second flange is fixed to the inner ring of the first flange, and the other end is provided with a limiting flange. The driving flap 2 is sleeved on the first flange, the driven flap 3 is sleeved on the second flange, and the limiting flange abuts against the driven flap 3 to perform Y - direction (left - right direction of the seat) limiting on the driven flap 3. The inner - inscribed circle apertures of the driving flap 2 and the driven flap 3 are different, so they rotate separately.

[0045] Referring to Figure 1 and Figure 4 , further, the spring holder 4 is fixed on the outside (the side away from the seat in the left - right direction of the seat) of the driven flap 3, and the spring 5 is sleeved on the outside (the side away from the seat in the left - right direction of the seat) of the spring holder 4; then referring to Figure 6 , a protrusion 2a is provided on the driving flap 2, and the protrusion 2a is used to enable the backrest structure to push the driving flap 2 to rotate when the backrest structure is laid down. Referring to Figure 2 and Figure 3, a first return elastic member 10, preferably a first return spring, is connected between the base 1 and the active flap 2, and a second return elastic member 11, preferably a second return spring, is connected between the inner rotating bracket 8 and the toilet bowl structure 1'. Through the expansion and contraction of the first return spring and the second return spring, the lifting rod 9 automatically descends and returns to its original position after being lifted. It should be noted that the present invention does not specifically limit the specific structure of the first return elastic member and the second return elastic member. In addition to being a spring, it can also be an elastic rubber, and those skilled in the art can set it according to their needs.

[0046] Continue to refer to Figure 1 , further, a first rotating shaft hole 7a is provided on the outer rotating bracket 7, a second rotating shaft hole 8a is provided on the inner rotating bracket 8, and a rotatable toilet bowl rotating shaft Y2 is provided on the toilet bowl structure 1'. The toilet bowl rotating shaft Y2 penetrates into the first rotating shaft hole 7a and the second rotating shaft hole 8a and is fixed to the toilet bowl rotating shaft Y2. The lifting rod 9 is a U-shaped rod. The lifting rod 9 is located in the middle space of the toilet bowl structure 1', and the U-shaped opening is arranged towards the front direction (the front part of the seat cushion) of the toilet bowl structure 1'. The end of the lifting rod 9 is fixed to the inner rotating bracket 8. The two ends of the coil spring 5 are respectively connected to the active flap 2 and the coil spring bracket 4, and the two ends of the cable 6 are respectively hinged to the passive flap 3 and the outer rotating bracket 7. It should be noted that the lifting rod 9 can be square, semi-circular, circular or other shapes in addition to being U-shaped, and no restrictions are imposed on this, and those skilled in the art can set it according to their needs.

[0047] When the backrest structure is reclined backward, the backrest structure abuts against the protrusion 2a on the active flap 2. The backward reclining force of the backrest structure pushes the active flap 2 to rotate counterclockwise, and the first return spring contracts. Since the deformation stiffness of the coil spring 5 between the active flap 2 and the coil spring bracket 4 is relatively large, it will directly drive the passive flap 3 fixedly connected to the coil spring bracket 4 to rotate counterclockwise synchronously. The passive flap 3 pulls the cable 6, causing the outer rotating bracket 7 and the inner rotating bracket 8 connected to it to rotate, and at the same time stretching the second return spring, thereby driving the lifting rod 9 to rotate upward. The lifting rod 9 lifts the seat cushion to make up for the height difference between the seat cushion and the backrest, making the seat more conformable to the human body.

[0048] Conversely, when the backrest structure rotates from the reclined state to the vertical state, the backrest structure no longer applies a force to the protrusion 2a. Under the elastic force of the first return spring, the active flap 2 drives the passive flap 3 to rotate clockwise. At the same time, after the cable 6 loses the tension of the passive flap 3, the lifting rod 9 rotates downward under the combined action of its own gravity and the human body gravity. Under the elastic force of the second return spring, the inner rotating bracket 8 rotates. Therefore, under the combined action of the gravity of the lifting rod 9 itself, the human body gravity, the first return spring and the second return spring, the active flap 2, the passive flap 3, the outer rotating bracket 7 and the inner rotating bracket 8 all return to their initial positions.

[0049] Refer to Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 Furthermore, two limiting tongues 3a are provided on the passive retaining piece 3, and a first limiting hole 1b and a second limiting hole 2b corresponding to the limiting tongues 3a are respectively provided on the base 1 and the active retaining piece 2. When the active retaining piece 2 rotates, the limiting tongues 3a can move back and forth within the first limiting hole 1b and the second limiting hole 2b. When the active retaining piece 2 rotates in place, the limiting tongues 3a are exactly blocked by the ends of the limiting holes to limit the passive retaining piece 3 and prevent excessive downward force on the cable 6.

[0050] Refer to Figure 9 、 Figure 10 and Figure 11 Furthermore, a first limiting portion is provided on the inner rotating bracket 8, and a second limiting portion corresponding to the first limiting portion is provided on the toilet bowl structure 1'. Preferably, the first limiting portion is one of a limiting bolt and a third limiting hole 8b, and the second limiting portion is the other of the limiting bolt and the third limiting hole 8b. In this embodiment, the third limiting hole 8b is provided on the inner rotating bracket 8, and the limiting bolt is provided on the toilet bowl structure 1' so that when the inner rotating bracket 8 rotates, the third limiting hole 8b moves back and forth on the limiting bolt. When the inner rotating bracket 8 rotates in place, the end of the third limiting hole 8b exactly abuts against the limiting bolt to limit the inner rotating bracket 8 and prevent excessive downward force on the cable 6. It should be noted that the first limiting portion and the second limiting portion can also be other structures, such as a limiting groove and a limiting block, etc., which can be set by those skilled in the art according to needs.

[0051] Refer to Figure 1 and Figure 5 Furthermore, a cable fixing hole 1c is also provided on the base 1, and the cable 6 passes through the cable fixing hole 1c to guide the cable 6 and prevent the cable 6 from shaking. Further, the cable 6 includes a steel wire and a sleeve sleeved on the outer periphery of the steel wire. The sleeve is fixed on the cable fixing hole 1c on the base 1, and the steel wire slides back and forth within the sleeve, so as to better guide the steel wire. However, it should be noted that the present invention does not impose any restrictions on the specific structure of the cable 6, which can be set by those skilled in the art according to needs.

[0052] Refer to Figure 6 and Figure 7, Further, a first limiting groove 2c is provided on the active retaining piece 2, a second limiting groove 4a is provided on the coil spring support 4, and first bends 5a and second bends 5b are respectively provided at both ends of the coil spring 5. After the coil spring 5 is sleeved on the coil spring support 4, the first bends 5a are embedded into the first limiting groove 2c on the active retaining piece 2, and the second bends 5b are embedded into the second limiting groove 4a on the coil spring support 4, so that the coil spring 5 is more stable. A first mounting hole 3b is provided on the passive retaining piece 3, a second mounting hole is provided on the outer rotating support 7, and hook-shaped ends 6a are respectively provided at both ends of the cable 6, and the two hook-shaped ends 6a are respectively hooked into the first mounting hole 3b and the second mounting hole.

[0053] When a person sits on the seat cushion and applies a large force to the seat cushion, the lifting rod 9 is subjected to a downward excessive force. Regarding the prevention of the downward excessive force on the lifting rod 9, the following three situations will be described in detail:

[0054] Refer to Figure 1 and Figure 10 , when the lifting rod 9 is in the initial lowest position, the third limiting hole 8b on the inner rotating support 8 is limited by the limiting bolt on the seat basin structure 1', and at the same time, the limiting tongue 3a on the passive retaining piece 3 is limited at the end of the first limiting hole 1b on the base 1 and the second limiting hole 2b on the active retaining piece 2. The passive retaining piece 3 cannot continue to rotate clockwise, and the downward excessive force on the lifting rod 9 cannot stretch the cable 6, thus playing a role in protecting the cable 6.

[0055] Refer to Figure 1 and Figure 11 , when the lifting rod 9 is in the highest position, the downward excessive force on the lifting rod 9 will be transmitted to the cable 6. It is set that the deformation force of the coil spring 5 is slightly less than the ultimate failure tension of the cable 6. If the excessive force exceeds the deformation force of the coil spring 5 at this time, the passive retaining piece 3 will be pulled and rotated by the cable 6, and the limiting tongue 3a will start to move in the first limiting hole 1b and the second limiting hole 2b. Since both ends of the coil spring 5 are connected to the active retaining piece 2 and the coil spring support 4, the downward excessive force on the lifting rod 9 can be absorbed by the deformation of the coil spring 5 until the deformation of the coil spring 5 reaches the limit of the above-mentioned first limiting hole 1b, second limiting hole 2b and third limiting hole 8b. The continued downward excessive force will be blocked by the first limiting hole 1b, second limiting hole 2b and third limiting hole 8b, and the downward excessive force on the lifting rod 9 cannot stretch the cable 6, thus playing a role in protecting the cable 6.

[0056] When the lifting rod 9 is between the initial lowest position and the highest position, the process of preventing the downward excessive force on the lifting rod 9 is the same as that when the lifting rod 9 is in the highest position. That is, when the excessive force is overloaded, the coil spring 5 deforms to absorb the excessive force until the deformation of the coil spring 5 reaches the limits of the first limit hole 1b, the second limit hole 2b, and the third limit hole 8b. The continuous downward excessive force will be blocked by the first limit hole 1b, the second limit hole 2b, and the third limit hole 8b.

[0057] From the above description of the structure of the seat cushion lifting mechanism and the prevention of the downward excessive force on the lifting rod 9, it can be seen that the seat cushion lifting mechanism of the present invention also solves the safety problem of the seat under abnormal working conditions. Through the structure of the coil spring 5 cooperating with the cable 6, the seat cushion lifting mechanism of the present invention can provide self-locking protection under abnormal working conditions such as pressure overload or the force on the rear part of the seat exceeding the limit of the cable, preventing damage caused by excessive force and improving the stability and safety of the lifting mechanism.

[0058] It should be noted that the coil spring 5 only works when the downward excessive force on the lifting rod 9 is overloaded, and in other cases, the cable 6 bears the tensile force. However, this is not restrictive, and the coil spring 5 can also always bear the force of the cable 6, which can be set by those skilled in the art according to needs.

[0059] In summary, the seat cushion lifting mechanism of the present invention is linked with the electric backrest. The cable pulls the rear part of the seat cushion to rise by means of the pulling force when the electric backrest tilts backward. It can not only save an independent driving device but also eliminate the manual adjustment step of the user. Through the optimized design of the structure, when the electric backrest rotates in place, the height of the seat cushion automatically levels with it. This not only saves production and installation costs but also improves the adjustment efficiency of the seat cushion. In addition, after saving an independent driving device for rear lifting, the weight and wiring harness burden of the seat are reduced. Furthermore, by adding a structure to prevent excessive force on the seat cushion in the seat cushion lifting mechanism, through the optimized design of the coil spring 5 cooperating with the cable 6 and its corresponding structure, the seat cushion lifting mechanism of the present invention can not only achieve a stable lifting function but also self-lock and prevent damage caused by excessive force, and the structure is simple and efficient, further improving the stability and safety of the seat cushion lifting mechanism under abnormal working conditions and greatly enhancing the user experience.

[0060] As described in the first paragraph of this section, the above embodiments are only used to illustrate the principle of the present invention and are not intended to limit the protection scope of the present invention. Without departing from the principle of the present invention, those skilled in the art can adjust the above structure so that the present invention can be applied to more specific application scenarios.

[0061] In addition, the present invention also provides a seat, which has the seat cushion lifting mechanism of the vehicle seat described in any of the above embodiments.

[0062] In addition, the present invention further provides a vehicle, which has the seat cushion lifting mechanism of the vehicle seat described in any one of the above embodiments.

[0063] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A seat cushion lifting mechanism for a seat, the seat comprising a seat pan structure, characterized in that, The seat cushion lifting mechanism of the seat includes a base, an active flap, a cable, a rotating bracket, and a lifting rod; The base is fixedly arranged on the seat pan structure; The active flap is rotatably arranged on the base; The seat cushion lifting mechanism of the seat further includes a passive flap and a torsion spring. The passive flap is rotatably arranged on the base, and two ends of the torsion spring are respectively connected with the passive flap and the active flap; The rotating bracket is rotatably arranged on the seat pan structure. One end of the cable is connected with the passive flap, and the other end is connected with the rotating bracket. The lifting rod is connected with the rotating bracket. When the active flap rotates, the rotating bracket is pulled to rotate through the cable so that the lifting rod moves up and down; A limiting tongue is arranged on the passive flap, and a first limiting hole and a second limiting hole corresponding to the limiting tongue are respectively arranged on the base and the active flap. When the active flap rotates, the limiting tongue can move back and forth in the first limiting hole and the second limiting hole.

2. The seat cushion lifting mechanism of the seat according to claim 1, characterized in that, The seat cushion lifting mechanism of the seat further includes a torsion spring bracket. The torsion spring bracket is fixed on the passive flap, the torsion spring is sleeved on the torsion spring bracket, and one end of the torsion spring is connected with the torsion spring bracket and the other end is connected with the active flap.

3. The seat cushion lifting mechanism of the seat according to claim 1, characterized in that The torsion spring and the cable are arranged such that the deformation force of the torsion spring is less than the ultimate failure tensile force of the cable.

4. The seat cushion lifting mechanism of the seat according to claim 1, characterized in that, The rotating bracket includes an outer rotating bracket, an inner rotating bracket, and a seat pan rotating shaft. The seat pan rotating shaft is rotatably arranged on the seat pan structure. The outer rotating bracket and the inner rotating bracket are fixed on the seat pan rotating shaft. The cable is connected with the outer rotating bracket, and the lifting rod is connected with the inner rotating bracket.

5. The seat cushion lifting mechanism of the seat according to claim 4, characterized in that, The inner rotating bracket is provided with a first limiting portion, and a second limiting portion corresponding to the first limiting portion is arranged on the seat pan structure. After the inner rotating bracket rotates in place, it is limited by the first limiting portion and the second limiting portion.

6. The seat cushion lifting mechanism of the seat according to claim 1, characterized in that, A first return elastic member is connected between the base and the active flap; and / or, a second return elastic member is connected between the rotating bracket and the seat pan structure.

7. The seat cushion lifting mechanism of the seat according to claim 1, characterized in that, A cable fixing hole is arranged on the base, and the cable passes through the cable fixing hole.

8. A seat, characterized in that, The seat is provided with the seat cushion lifting mechanism of the seat according to any one of claims 1-7.

9. A vehicle, characterized in that, The vehicle is provided with the seat cushion lifting mechanism of the seat according to any one of claims 1-7.

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