Patent ID: 12208711

DETAILED DESCRIPTION

Hereinafter, the present disclosure will be described in detail with reference to illustrative drawings. In adding reference numerals to the components of respective drawings, it should be noted that the same components are given the same reference numerals as possible even if they are indicated on different drawings.

In this specification, terms such as first, second, third, and the like may be used to describe various components, but the order, size, position and the importance of these components are not limited by the terms such as first, second, third and the like, and the terms are named only for distinguishing one component from another.

FIG.1is a perspective view showing an example seat for a vehicle, andFIG.2is a side view ofFIG.1, showing a reference posture for operation.FIG.3is a cross-sectional view taken along line A-A′ ofFIG.1.

An example seat for a vehicle may comprise a seat cushion for seating of the lower body, a seat back on which the upper body may lean, and/or a headrest for supporting the head and/or the neck.

As shown inFIG.1, the seat for a vehicle may comprise a pair of support rails10, (which may be referred to as a support rail10), a first slide unit20, a second slide unit30, a pair of cushion side frames40, a first link member51, and/or a second link member52.

For example, the first slide unit20and the second slide unit30may constitute a double slider.

The pair of support rails10may be fixedly mounted to the floor panel in the interior of the vehicle. An open passage11elongated back and forth for sliding movement of the first slide unit20may be formed on the upper portion of the support rail10. The hollow portion inside of the support rail10may be configured as a sliding movement path of the first slide unit20.

The first slide unit20may be manipulated by manual control of a towel bar. Alternatively or additionally, the first slide unit20may be manipulated by an electric motor according to control of a switch (e.g., as described herein).

As shown inFIGS.1and3, for example of electric powered manipulation, the first slide unit20may comprise a first lead screw21, a stopper22, a moving rail23, a first mounting bracket24, a first motor25, and/or a first gearbox26.

The first lead screw21may be disposed inside the support rail10in the longitudinal direction of the support rail10. The first lead screw21may have a thread formed on an outer circumferential surface. Both ends of the first lead screw21may be respectively coupled to a pair of stoppers22fixedly installed on the support rail10, such that the first lead screw21may be fixedly supported by the stoppers22.

The moving rail23may be inserted into the support rail10and may slide back and forth in the longitudinal direction of the support rail10in the hollow portion of the support rail10.

The first mounting bracket24may be positioned between a pair of moving rails23to couple to the moving rails23.

The first motor25may comprise a motor shaft of the first motor25and may be firmly fixed on the first mounting bracket24. The motor shaft of the first motor25may extend to both sides in the axial direction of the first motor25, such that both ends of the motor shaft of the first motor25may be respectively connected to a pair of moving rails23. For example, the end of the motor shaft of the first motor25may pass through the side wall of the moving rail23.

The first gearbox26may be fixed to the moving rail23. At least one end of the motor shaft of the first motor25may be inserted into the first gearbox26. The first lead screw21may be formed and installed to pass through the first gearbox26. In the first gearbox26, for example, a worm wheel27that meshes with the first lead screw21and moves along the first lead screw21during rotation, and a worm shaft28that coupled to the end of the motor shaft of the first motor25and meshing with the worm wheel27in a direction orthogonal to the worm wheel27may be disposed.

In response to a user request, for example, (e.g., a switch operation) the first motor25may be driven, and the motor shaft of the first motor25may rotate. The worm shaft28coupled to the motor shaft of the first motor25may rotate such that the worm wheel27meshing with the worm shaft28may rotate. The power of the first motor25may be transmitted to the worm wheel27through the motor shaft of the first motor25and/or the worm shaft28, and therefore, the worm wheel27may rotate.

Since the first lead screw21is fixed in the support rail10, the worm wheel27meshing with the first lead screw21may relatively move along the first lead screw21. Accordingly, the entire first gearbox26including the worm wheel27may move along the first lead screw21, and the moving rail23coupled to the first gearbox26may move relative to the support rail10in the longitudinal direction of the support rail10.

For example, the first mounting bracket24coupled to the moving rail23may move together with the first motor25fixed on the first mounting bracket24.

The cushion side frame40coupled with the moving rail23may move together, thereby adjusting the front and rear positions of the seat.

The configuration of the first slide unit20of the electric type need not be limited to the above-described example. For example, the first slide unit20may comprise a motor, a gearbox, a pinion connected to an output shaft of the gearbox, and/or a rack gear engaged with the pinion and/or installed on the support rail (e.g., to automatically move the moving rail23within the support rail10).

As the first slide unit20of the manual type, a towel bar mechanism including a latch may be employed. Since towel bar mechanisms having various configurations are already known, a detailed description thereof will be omitted.

The second slide unit30may be installed on the moving rail23of the first slide unit20and may move in the longitudinal direction of the support rail10together with the moving rail23.

The seat for a vehicle may comprise a support bracket33coupled to the moving rail23, for installation of the second slide unit30. The support bracket33may comprise a mounting portion33afor installation of the second slide unit30, and/or a first hinge portion33bfor coupling with the first link member51. This support bracket33may be integrally formed with the moving rail23, or may be separately made and then assembled with the moving rail23.

The second slide unit30may comprise a second lead screw31, a stopper32, a second mounting bracket34, a second motor35, and/or a second gearbox36.

The second lead screw31may be disposed along the longitudinal direction of the moving rail23on the moving rail23. The second lead screw31may have a thread formed on an outer circumferential surface. Both ends of the second lead screw may be respectively coupled to a pair of stoppers32fixedly installed on the support bracket33, such that the second lead screw31may be fixedly supported by the stoppers32.

The second mounting bracket34may be positioned between the pair of moving rails23to couple to the pair of second lead screws31.

The second motor35may comprise a motor shaft. The second motor35may be firmly fixed on the second mounting bracket34. The motor shaft of the second motor35may extend to both sides in the axial direction of the second motor35, and both ends of the motor shaft of the second motor35may be respectively coupled to the pair of second lead screws31.

For example, the first motor25and the second motor35may be alternately disposed in the width direction of the sheet (e.g., in the left and right of the sheet so that there is no interference therebetween). As shown inFIG.1, the first motor25may be positioned to be biased toward the left side of the seat, and the second motor35may be positioned to be biased to the right side of the seat.

The second gearbox36may be formed and installed such that at least one end of the motor shaft of the second motor35is inserted into the second gearbox36. The second lead screw31may pass through the second gearbox36. In the second gearbox36, for example, a worm wheel37may mesh with the second lead screw31and may be moved along the second lead screw31during rotation, and a worm shaft38may be coupled to the end of the motor shaft of the second motor35and may mesh with the worm wheel37in a direction orthogonal to the worm wheel37.

A second hinge portion36bfor coupling with the second link member52may be formed on the outside of the second gearbox36.

For example, the second motor35may be driven in response to a user's request (e.g., a switch operation), and the motor shaft of the second motor35may rotate. The worm shaft38coupled to the motor shaft of the second motor35may rotate so that the worm wheel37meshing with the worm shaft38may rotate. The power of the second motor35may be transmitted to the worm wheel37through the motor shaft of the second motor35and/or the worm shaft38, and therefore, the worm wheel38may rotate.

Since the second lead screw31is fixed on the support bracket33, the worm wheel37meshing with the second lead screw31may relatively move along the second lead screw31. Accordingly, the entire second gearbox36including the worm wheel37may move along the second lead screw31, and the second link member52coupled to the second gearbox36may move and rotate relative to the moving rail23and the support rail10in the longitudinal direction of the moving rail23and in the longitudinal direction of the support rail10.

For example, the second mounting bracket34coupled to the second gearbox36may move together with the second motor35fixed on the second mounting bracket34.

The cushion side frame40coupled to the second gearbox36may rotate while moving together, thereby adjusting the tilting of the seat.

The configuration of the second slide unit30need not be limited to the above-described example. For example, the second slide unit30may comprise a motor, a gearbox, a pinion connected to the output shaft of the gearbox, and/or a rack gear engaged with the pinion and/or installed on the moving rail (e.g., to automatically move the second gearbox36on the moving rail23).

The pair of cushion side frames40may be a pair of members having the same shape arranged on the left and right sides of the seat. At least one support member41connecting and supporting the cushion side frames40may be interposed between the cushion side frames. The support member41may be formed of a tubular member having a circular cross-section.

Each cushion side frame40may comprise a first hinge hole43formed in one side and/or a second hinge hole44formed in the other side.

One end of the first link member51may be rotatably hinged to the first hinge hole43of the cushion side frame40, and the other end of the first link member51may be rotatably hinged to the first hinge portion33bof the support bracket33that is coupled to the moving rail23of the first slide unit20.

One end of the second link member52may be rotatably hinged to the second hinge hole44of the cushion side frame40, and the other end of the second link member may be rotatably hinged to the second hinge portion36bof the second gearbox36that is movably coupled to the second lead screw31of the second slide unit30.

As shown inFIG.2, the first link member51may be located on the front side of the seat and may be hinged to the first hinge portion33bof the support bracket33coupled to the first slide unit20, while the second link member52may be located on the rear side of the seat and may be hinged to the second hinge portion36bof the second gearbox36constituting the second slide unit30.

Although theFIGS.1-3show that the first link member51corresponds to the front link member and the second link member52corresponds to the rear link member, the coupling and/or arrangement relationship of the link members need not be necessarily limited thereto.

The coupling and/or arrangement relationship of the link members may be configured opposite to the above-described configuration. For example, the first link member51may be positioned on the front side of the seat and may be hinged to the second hinge portion36bof the second gearbox36constituting the second slide unit30. The second link member52may be located on the rear side of the seat and may be hinged to the first hinge portion33bof the support bracket33coupled (e.g. linked) to the first slide unit20.

To the first link member51and/or the second link member52hinged to the second hinge portion36bof the second gearbox36constituting the second slide unit30, a third motor55capable of applying a rotational force to the first link member51and/or the second link member52may be coupled.

As shown inFIGS.1and2, the third motor55may be mounted on the outer side surface of the one of cushion side frames40.

If the second link member52is located on the rear side of the seat and is hinged to the second hinge portion36bof the second gearbox36constituting the second slide unit30, the second link member52may rotate on the rear side of the seat by the driving of the third motor55, and therefore, the height of the entire seat cushion or the height of at least the rear end of the seat cushion may be adjusted.

A third gearbox56may be coupled to the motor shaft of the third motor55, and/or a sector gear (not illustrated) engaged with the output gear of the third gearbox may be formed on one side of the second link member52. Accordingly, the power of the third motor55may be transmitted to the second link member52through the motor shaft of the third motor55, the third gearbox56, and/or the sector gear. Thus, the second link member52may be rotated centering on the second hinge portion36bof the second gearbox36.

The support member41connecting the cushion side frames40may be fixedly coupled to one end of the second link member52.

As shown inFIG.1, the support member41may be positioned on the rear side of the seat, between the pair of left and right side cushion side frames40. Both ends of the support member41may pass through each cushion side frame40to be coupled thereto, and to enable relative rotation with respect to the cushion side frames40.

The end of the support member41may be fixed to one end of the second link member52. For example, the end of the support member41may pass through the second link member52, such that the support member41and the second link member52may be integrally and completely fixedly coupled by welding or any other method.

Accordingly, by receiving the power of the third motor55, the second link member52may be rotated about the second hinge portion36bof the second gearbox36and may move up and down as the support member41rotates together with the rotation of the second link member52.

Due to the vertical movement of the support member41, both cushion side frames40may move up and down. Thus, the seat cushion and/or the entire seat may move up and down to adjust the height. The tilting of the seat cushion may be adjusted.

The second slide unit30may be disposed symmetrically on the left and right of the seat, and also, the support member41may equally support both cushion side frames40and/or both second link members52, such that the seat for a vehicle may be improved in the clearance and/or crashworthiness of the seat to the existing seat level or more.

A reclining unit60may be interposed between the seat cushion and the seat back of the seat for a vehicle. The angle of inclination of the seat back with respect to the seat cushion may be appropriately adjusted by the reclining unit60. The reclining unit60may be powered by a motor.

A connection bracket42may be mounted on the rear side of the pair of cushion side frames40. A hinge portion45for coupling the back frame59of the seat back may be formed in the connection bracket42. A hinge hole54may be formed in a lower portion of the back frame59. For example, a bush64may be fixedly coupled to the hinge portion45of the connection bracket42, and may be rotatably coupled to the hinge hole54of the back frame59.

The reclining unit60may comprise a recliner61, a shaft62, a fourth motor65, and/or a power transmission mechanism66.

The recliner61may be installed to correspond to the hinge hole54in the back frame59. The recliner61may substantially rotate the seat back relative to the seat cushion, thereby allowing the angle of inclination of the seat back relative to the seat cushion to be adjusted back and forth. Since recliners having various configurations are already known, a detailed description thereof will be omitted.

For example, the shaft62may be disposed along the width direction of the seat. Both ends of the shaft62may respectively pass through the hinge holes54of the back frame59(e.g., on the left and right sides of the seat). Both ends of the shaft62may be fixed to the hinge portion45of the connection bracket42.

For example, the shaft62may be coaxially coupled to the bush64. A spline may be formed on the surface of the shaft62by machining a groove. A fitting groove may be formed in the bush64to be fitted with the spline of the shaft62. Accordingly, the shaft62may be fixed to the connection bracket42and/or the cushion side frame40through the bush64.

The shaft62may pass through the recliner61and may be connected thereto, to therefore switch the recliner61into a locked state that fixes the seat back at a predetermined angle due to the rotation of the shaft62and an unlocked state that enables rotation of the seat back.

The fourth motor65may be fixedly installed on the back frame59and may output a rotational force through the motor shaft of the fourth motor65. For example, the fourth motor65may be fixed to the lower portion of the back frame59such that the motor shaft of the fourth motor65is vertically disposed.

The power transmission mechanism66may transmit the rotational force output from the motor shaft of the fourth motor65to the shaft62. The power transmission mechanism66may be disposed between the motor shaft of the fourth motor65and the shaft62.

For example, if the motor shaft of the fourth motor65and the shaft62are disposed at approximately right angles to each other, the power transmission mechanism66configured to comprise a worm shaft and/or a worm wheel may thus transmit rotational force from the motor shaft of the fourth motor65to the shaft62(e.g., and decelerate the rotational force). At least one gear may further be interposed between the worm wheel and the shaft62.

In response to a user's request (e.g., a switch operation), the fourth motor65may be driven, and the motor shaft of the fourth motor65may rotate. As the power of the fourth motor65is transmitted to the worm wheel, for example, through the motor shaft of the fourth motor65and/or the worm shaft, the shaft62may relatively rotate.

With the shaft62fixed to the connection bracket42, if a rotational force is input from the motor shaft of the fourth motor65to the shaft62, the fourth motor65may rotate around the shaft62. Since the fourth motor65is fixed to the back frame59, the seat back may rotate about the bush64with respect to the seat cushion.

Due to the rotation of the shaft62, the recliner61may be operated to increase or decrease the angle of inclination of the seat back with respect to the seat cushion.

For example, a seat for a vehicle may further comprise a switch (not illustrated) for inputting a user's request, and/or a control unit (not illustrated) controlling operations of the first to fourth motors25,35,55and/or65according to a switch operation.

The control unit may control operations of the first slide unit20, the second slide unit30, the first link member51, the second link member52, and/or the reclining unit60based on the user's switch operation.

For example, the first to fourth motors25,35,55, and/or65may be a servo motor and/or a step motor capable of forward and reverse rotation.

Hereinafter, the operation of the seat for a vehicle comprising the above-described configuration will be described.

For example, the seat for a vehicle may basically implement a forward/backward mode.

As shown inFIG.2, in a state in which the seat for a vehicle maintains the reference posture, the first motor25may be driven in response to a user's request (e.g., a switch operation), and the motor shaft of the first motor25may rotate in one direction. The worm shaft28coupled to the motor shaft of the first motor25may rotate and the worm wheel27meshing with the worm shaft28may rotate.

Since the first lead screw21is fixed in the support rail10, the worm wheel27meshing with the first lead screw21may relatively move along the first lead screw21. Accordingly, the entire first gearbox26including the worm wheel27may move along the first lead screw21.

The moving rail23coupled to the first gearbox26may move relative to the support rail10in the longitudinal direction of the support rail10. For example, as the cushion side frame40coupled with the moving rail23may move together, the seat cushion and/or the entire seat may move forward or backward adjusting the front and rear positions of the seat.

FIG.4is a side view showing an example height mode of a seat for a vehicle.

In the seat for a vehicle, the front end and the rear end of the cushion side frame40may be raised or lowered at the same time to raise or lower the height of the seat cushion and/or the entire seat.

For example, if the second link member52is located on the rear side of the seat and is hinged to the second hinge portion36bof the second gearbox36constituting the second slide unit30, the third motor55connected to the second link member52may be driven in response to a user's request (e.g., a switch operation), and the motor shaft of the third motor55may rotate in one direction.

Accordingly, the power of the third motor55may be transmitted to the second link member52through the motor shaft of the third motor55, the third gearbox56, and/or the sector gear. Thus, the second link member52may rotate forward with the second hinge portion36bof the second gearbox36as the center, and simultaneously, a portion of the cushion side frame40connected to the second link member52may be raised upwardly.

The second slide unit30may not operate. For example, the second motor35may not be driven in the height mode. The distance between the first hinge portion33band the second hinge portion36bmay not change and may be maintained in an original state thereof.

Due to the rotation of the second link member52, the first link member51may rotate forward about the first hinge portion33bof the support bracket33coupled to the moving rail23, and at the same time, a portion of the cushion side frame40connected to the first link member51may be raised upward.

Accordingly, as the front end and the rear end of the cushion side frame40rise at the same time, the height of the seat cushion and/or the entire seat may be adjusted to rise. The operation of adjusting the height of the seat to be lowered may be performed by driving the third motor55in the previous reverse direction.

In this manner, the height of the seat for a vehicle may be adjusted through the height mode by the structure of the 4-bar linkage.

FIG.5is a side view showing an example relaxation mode of a seat for a vehicle.

The seat for a vehicle may tilt such that the rear end of the seat cushion may be relatively lowered by lowering and simultaneously moving forward slightly the rear end of the cushion side frame40.

For example, if the second link member52is located on the rear side of the seat and is hinged to the second hinge portion36bof the second gearbox36constituting the second slide unit30, the third motor55connected to the second link member52may be driven in response to a user's request (e.g., a switch operation), and the motor shaft of the third motor55may rotate in one direction (e.g., the reverse direction inFIG.3).

Accordingly, the power of the third motor55may be transmitted to the second link member52through the motor shaft of the third motor55, the third gearbox56, and/or the sector gear. Thus, the second link member52may be rotated rearwardly about the second hinge portion36bof the second gearbox36, and at the same time, a portion of the cushion side frame40connected to the second link member52may be lowered downward. For example, the second link member52may rotate such that the rear end of the seat cushion reaches a lowest position.

The second slide unit30may operate. For example, the second motor35may be driven, and the motor shaft of the second motor35may rotate in one direction. The worm shaft38coupled to the motor shaft of the second motor35may rotate, and the worm wheel37meshing with the worm shaft38may rotate.

Since the second lead screw31is fixed on the support bracket33, the worm wheel37meshing with the second lead screw31may relatively move along the second lead screw31. Accordingly, the entire second gearbox36including the worm wheel37may move forward along the second lead screw31, and the second link member52coupled to the second gearbox36may relatively move and rotate with respect to the moving rail23and the support rail10in the longitudinal direction of the moving rail23and in the longitudinal direction of the support rail10.

The cushion side frame40coupled to the second gearbox36may rotate while moving forward together, thereby the tilting of the seat may be adjusted.

Due to the forward movement of the second gearbox36, the second link member52, and/or the cushion side frame40, the distance between the first hinge portion33band the second hinge portion36bmay be reduced, and the first link member51may rotate forward around the first hinge portion33bof the support bracket33coupled to the moving rail23, and at the same time, a portion of the cushion side frame40connected to the first link member51may be lifted upward.

Accordingly, the front end of the cushion side frame40may rise and the rear end thereof may descend. For example, the amount of change in the angle of the seat cushion may be adjusted to be approximately 13° or more, and the lower body of the user may be supported by the tilted seat cushion.

The reclining unit60may operate. For example, the fourth motor65may be driven, and the motor shaft of the fourth motor65may rotate in one direction.

With the shaft62fixed to the connection bracket42, if a rotational force is input from the motor shaft of the fourth motor65to the shaft62through, for example, the worm shaft and/or the worm wheel, the fourth motor65may rotate around the shaft62. Since the fourth motor65is fixed to the back frame59, the seat back may rotate about the bush64with respect to the seat cushion.

The rotation of the shaft62may actuate the recliner61to increase the angle of inclination of the seat back with respect to the seat cushion.

For example, the angle of inclination of the seat back with respect to the seat cushion may be adjusted within a range of approximately 105° to 120° or any other range, and the user may be supported by the seat back in a state in which the angle of inclination of the seat back is adjusted.

The rear end of the cushion side frame40is positioned relatively lower than the front end, and by making the seat back open with respect to the seat cushion, the user may take a convenient and comfortable posture.

In this manner, the seat for a vehicle may implement various postures of the seat through the structure of the 4-bar linkage and the relaxation mode by the second slide unit30.

FIG.6is a side view showing an example mode of getting in and out of a seat for a vehicle.

The seat for a vehicle may tilt such that the front end of the seat cushion is relatively lowed by moving the cushion side frame40backward.

For example, if the second link member52is located on the rear side of the seat and is hinged to the second hinge portion36bof the second gearbox36constituting the second slide unit30, the second motor35constituting the second slide unit30may be driven in response to a user's request (e.g., a switch operation), and the motor shaft of the second motor35may rotate in one direction (e.g., the reverse direction inFIG.5). The worm shaft38coupled to the motor shaft of the second motor35may rotate and the worm wheel37meshing with the worm shaft37may rotate.

Since the second lead screw31is fixed on the support bracket33, the worm wheel37meshing with the second lead screw31may relatively move along the second lead screw31. Accordingly, the entire second gearbox36including the worm wheel37may move rearward along the second lead screw31, and the second link member52coupled to the second gearbox36may relatively move and rotate with respect to the moving rail23and the support rail10in the longitudinal direction of the moving rail23and in the longitudinal direction of the support rail10.

As the cushion side frame40coupled to the second gearbox36may rotate while moving backward together, the tilting of the seat may be adjusted.

Due to the rearward movement of the second gearbox36, the second link member52, and/or the cushion side frame40, the distance between the first hinge portion33band the second hinge portion36bmay be increased, and the first link member51may rotate backward around the first hinge portion33bof the support bracket33coupled to the moving rail23, and at the same time, a portion of the cushion side frame40connected to the first link member51may be lowered downward.

Accordingly, the front end of the cushion side frame40may be lowered. For example, as the front end of the cushion side frame40is disposed to be relatively lower than the rear end, the seat for a vehicle may provide convenience to the user when getting in and/or out.

In this manner, the seat for a vehicle may implement various postures of the seat through the structure of the 4-bar linkage and the getting in and out mode by the second slide unit30.

According to an aspect of the present disclosure, a seat for a vehicle includes a pair of support rails coupled to the vehicle and arranged to be spaced apart from side to side; a first slide unit slidably installed back and forth on the support rail; a second slide unit slidably installed back and forth on the first slide unit; a pair of cushion side frames spaced apart from side to side; a first link member connecting the cushion side frame and the first slide unit; and a second link member connecting the cushion side frame and the second slide unit.

The first slide unit may be connected to the support rail and include a moving rail that slides back and forth in a longitudinal direction of the support rail by receiving power from a first motor, and the second slide unit may be installed on the moving rail.

The seat for a vehicle may further include a support bracket coupled to the moving rail, for installation of the second slide unit, and the support bracket may include a mounting portion formed for installation of the second slide unit, and a first hinge portion for connection of the first link member.

The second slide unit may include a second hinge portion for connection of the second link member.

The second slide unit may include a second lead screw disposed on the moving rail in a longitudinal direction of the moving rail and having a thread formed on an outer circumferential surface, a second mounting bracket positioned between both moving rails and connecting both second lead screws, a second motor having a motor shaft and fixed on the second mounting bracket; and a second gearbox into which an end of the motor shaft of the second motor is inserted and the second lead screw passes therethrough, such that the end of the motor shaft is engaged with the second lead screw.

The second hinge portion may be formed on an outside of the second gearbox.

Each cushion side frame may have a first hinge hole in one side and a second hinge hole in the other side, one end of the first link member may be rotatably hinged to the first hinge hole, the other end of the first link member may be rotatably hinged to the first hinge portion, one end of the second link member may be rotatably hinged to the second hinge hole, and the other end of the second link member may be rotatably hinged to the second hinge portion.

The seat for a vehicle may further include a third motor applying a rotational force to the second link member, a motor shaft of the third motor may be connected to a third gearbox, and a sector gear meshing with an output gear of the third gearbox may be formed on one side of the second link member.

The seat for a vehicle may further include a reclining unit interposed between a seat cushion and a seat back, and the reclining unit may include a recliner that receives power of a fourth motor through a shaft and is converted into a locking state in which the seat back is fixed at a predetermined angle and an unlocked state in which the seat back is rotatable.

The seat for a vehicle may execute a relaxation mode by a second motor that provides power to the second slide unit such that the second slide unit may slide forward and backward and a third motor that applies a rotational force to the second link member.

In the relaxation mode, the second link member may rotate by the rotational force applied from the third motor, and at the same time, may lower a portion of the cushion side frame connected to the second link member, the second slide unit may slide by the second motor to move and rotate the cushion side frame, and the first link member may rotate and at the same time may raise a portion of the cushion side frame connected to the first link member.

The seat for a vehicle may further include a reclining unit interposed between a seat cushion and a seat back, and in the relaxation mode, the reclining unit may operate to adjust an angle of inclination of the seat back with respect to the seat cushion.

The seat for a vehicle may execute a getting on and off mode by a second motor providing power to the second slide unit such that the second slide unit may slide forward and backward.

In the getting on and off mode, as the second slide unit slides by the second motor, the second link member may relatively move and may rotate in a longitudinal direction of the support rail, and the cushion side frame may rotate while moving together, and the first link member may be rotated and at the same time lowers a portion of the cushion side frame connected to the first link member.

According to an aspect of the present disclosure, a seat for a vehicle includes a pair of support rails coupled to the vehicle and spaced apart from side to side; a double slider installed to be slidable back and forth on the support rail; a pair of cushion side frames spaced apart from side to side; a front link member hinging the cushion side frame and one side of the double slider to each other; and a rear link member hinging the cushion side frame and the other side of the double slider. The double slider may include a first slide unit hinged to the front link member, and a second slide unit hinged to the rear link member and movable relative to the first slide unit.

As described above, the user's convenience and comfort may be improved by applying a double slider to implement various postures with a relatively simple configuration, and at the same time, the weight and the number of parts are reduced to save the costs, and an excellent packaging effect may be obtained.

If the double sliders are symmetrically disposed on the left and right sides of the seat, there is an effect that the clearance and crashworthiness may be improved beyond the existing seat level.

While various example have been illustrated and described above, it will be apparent to those skilled in the art that modifications and variations could be made without departing from the scope of the present disclosure as defined by the appended claims.