JP2010036719A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle seat that enables a seat-surface length of a seat cushion to be changed with a simple structure. <P>SOLUTION: The vehicle seat includes a seat lifter 5 configured to be extensible/contractable in a vehicle vertical direction, a seat-cushion pan 22 mounted at the upper end part of the seat lifter 5 while forming a frame of a seat cushion 2, a seat-cushion pad 23 provided on the seat-cushion pan 22 so as to be elastically deformable, a seat skin 24 covering the seat-cushion pad 23, and a seat-surface length variable mechanism M for changing the front-rear length of the seat cushion 2 when the seat cushion 2 covered with the seat skin 24 is lifted. When the seat cushion 2 is lifted due to the extension of the seat lifter 5, the front end part 23F of the seat-cushion pad 23 is compressed toward the vehicle rear, thereby reducing the front-rear length of the seat cushion 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle seat.

  Conventionally, a technique has been proposed in which an adjuster mechanism is provided in a vehicle seat to change the longitudinal length of a seat cushion on which an occupant is seated according to the physique of the occupant (see, for example, Patent Document 1).

  The adjuster mechanism includes a pinion gear provided on the operation knob, a sector gear meshing with the pinion gear, link plates provided on the front and rear portions of the seat cushion, a link bar connecting the sector gear and the rear link plate, and the like. Configured. Then, by operating the operation knob, the sector gear is swung up and swung to pull the link bar forward, and the rear link plate is pushed back and moved accordingly, so that the front link plate is pushed back and moved. Let

As a result, the seat cushion moves backward while being displaced, and the seat cushion height and seat length of the seat cushion are adjusted by moving the seat cushion rearward while retracting under the seat back. It is like that.
Japanese Patent Laying-Open No. 2005-75192 (page 3, FIG. 1)

  In such a conventional vehicle seat, when a small occupant operates the adjuster mechanism to increase the seat surface height, the seat cushion moves rearward along with the operation of the adjuster mechanism, and the seat surface length can be shortened.

  However, since this adjuster mechanism uses a complicated gear mechanism, the number of parts constituting the vehicle seat is large and the structure is complicated.

  Therefore, the present invention provides a vehicle seat that can change the seating surface length of a seat cushion with a simple structure.

  The present invention relates to a seat slide device for supporting a seat cushion on which a passenger is seated on a vehicle body floor, a cushion pan attached to the seat slide device through a seat lifter so as to be lifted and lowered, and a seat surface laid on the upper side of the cushion pan. A cushion for a vehicle having a cushioning pad and a seat skin covering the surface of the cushion pad, and the amount of deformation in the front-rear direction of the cushion pad changes as the seat lifter moves up and down The main feature is that a seat surface length variable mechanism is provided, and the deformation amount of the cushion pad is increased when the seat lifter is raised, and is decreased when the seat lifter is lowered.

  According to the present invention, the seating surface length varying mechanism changes the amount of deformation in the front-rear direction of the cushion pad as the seat lifter moves up and down. That is, the amount of deformation of the cushion pad is increased when the seat lifter is raised, and the amount of deformation of the cushion pad is decreased when the seat lifter is lowered. Therefore, when a small occupant is seated, if the seat lifter is raised in accordance with the physique, the amount of deformation of the cushion pad increases and the seating surface length can be shortened. At this time, in the seating surface length varying mechanism, the cushion pad only deforms in the front-rear direction when the seat lifter is raised and lowered, so the front-rear position of the seat cushion itself does not change. Thereby, the passenger can omit the trouble of re-sitting each time the seat lifter is adjusted, so that the adjustment work of the height and length of the seating surface according to the physique is facilitated.

  Further, since the seat surface length variable mechanism can move up and down without changing the front and rear position of the seat cushion itself, the front and rear position of the occupant relative to the seat back can be maintained substantially constant. Accordingly, when the seat lifter is raised, the occupant is not pressed against the seat back, so that a good sitting comfort can be maintained.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
1 to 3 show a first embodiment of a vehicle seat according to the present invention, FIG. 1 is a sectional view of the vehicle seat according to the first embodiment of the present invention as seen from the side, and FIG. FIG. 3 is a plan view of the vehicle seat shown in FIG. 2, and FIG. 3 is a sectional view of the vehicle seat showing a state where the seat lifter is operated.

  As shown in FIG. 1, the vehicle seat 1 of the present embodiment includes a seat cushion 2 on which an occupant is seated and a seat back 3 that is a backrest in a seated state.

  A mounting bracket 41 having a substantially hat-shaped cross section is joined to the vehicle body floor 4, and a seat slide device 6 is disposed on the mounting bracket 41. The seat slide device 6 includes a lower rail 61 attached to the mounting bracket 41, an upper rail 62 slidably engaged with the lower rail 61 along the front-rear direction, and a seat frame 21 fixed to the upper rail 62. It is configured. A lower end portion of a seat lifter 5 including link mechanisms 51 and 52 that can be expanded and contracted in the vertical direction is pivotally supported at the front end portion and the rear end portion of the seat frame 21. The link mechanisms 51 and 52 are configured such that two link members are pivotally supported via pins, and can be expanded and contracted in the vertical direction via a driving device (not shown). The upper ends of the link mechanisms 51 and 52 support the lower surface of the cushion pan 22. The front end 22f of the cushion pan 22 is curved in a substantially arc shape downward, and the upper end portion of the link mechanism 51 is pivotally supported by the front end 22f. Similarly, the upper end portion of the rear link mechanism 52 supports the lower surface of the rear end portion of the cushion pan 22.

  An elastic cushion pad 23 is laid on the cushion pan 22. The front end portion 23F of the cushion pad 23 is bent in a substantially J shape when viewed from the side, and is disposed so as to wrap around the front end 22f of the cushion pan 22.

  Furthermore, the outer surface of the cushion pad 23 is covered with a seat skin 24 having low stretchability (that is, difficult to expand and contract). As the seat skin 24, it is preferable to use a film-like material having a strong tensile force such as leather, synthetic leather or cloth. The front edge 24F of the seat skin 24 covers the front end 23F of the cushion pad 23, and the front edge 24E of the seat skin 24 is connected to a connecting rod 30 that connects the front ends of the left and right seat frames 21 in the vehicle width direction. It is fixed.

  In the present embodiment, the seating surface length variable mechanism M is configured by the front edge portion 24F of the seat skin 24 in which the leading edge 24E is attached to the connecting rod 30.

  Next, a change in the seating surface length when the above-described seat lifter 5 of FIG. 1 is operated will be described with reference to FIG. In FIG. 2, the broken line indicates the state before the operation of the seat lifter 5, and the solid line indicates the state after the operation of the seat lifter 5.

  When the switch (not shown) is turned on, the drive device is activated, and the front and rear link mechanisms 51 and 52 extend upward. Then, the cushion pan 22 supported by the upper ends of the link mechanisms 51 and 52 rises. Along with this, the cushion pad 23 laid on the cushion pan 22 and the seat skin 24 covering the outer surface of the cushion pad 23 are formed. It moves upward and the seat surface 2S of the seat cushion 2 rises.

  Here, as shown by a broken line in FIG. 3, the connecting rod 30 extends along the vehicle width direction, and the leading edge 24 </ b> E of the seat skin 24 is fixed at the left and right ends P <b> 1 and P <b> 2 of the connecting rod 30. Has been. Therefore, when the seat surface 2S is raised, as shown in FIG. 3, the leading edge 24E of the seat skin 24 is pulled diagonally downward toward the rear of the vehicle at the two left and right points P1 and P2.

  Accordingly, when the cushion pad 23 is raised, the seating surface length varying mechanism M acts, the front edge portion 24F of the seat skin 24 is pulled obliquely downward and rearward, and tension acts on the seat skin 24. As a result, the front end portion 23F of the cushion pad 23 is compressed and deformed toward the rear of the vehicle, so that the longitudinal length L of the seat surface 2S is shortened.

  Below, the effect by this embodiment is demonstrated.

(1) The seat surface length variable mechanism M according to the present embodiment is configured so that the seat lifter 5 extends upward and the seat cushion pan 22, the seat cushion pad 23, and the seat skin 24 rise, and the leading edge of the seat skin 24 The front end 23F of the seat cushion pad 23 is configured to be compressed rearward of the vehicle by pulling 24E downward. Therefore, it is possible to easily adjust the height and length of the seating surface 2S according to the occupant's physique with a simple structure and maintain a good sitting comfort.

(2) The front end position of the seat cushion pan 22 is disposed rearward of the vehicle with respect to the front end position of the seat cushion pad 23, and the front edge 24E of the seat cover 24 is attached to the seat slide device 6. Therefore, the front end portion 23F of the seat cushion pad 23 arranged on the front side from the front end of the seat cushion pan 22 can be efficiently compressed and deformed to easily adjust the height and length of the seating surface 2S. it can.

(3) Since both side portions in the vehicle width direction of the front edge 24E of the seat skin 24 are attached to the seat slide device 6 as shown in FIG. 3, the front end portion 23F of the seat cushion pad 23 is evenly and horizontally downward. By pulling, the left-right difference in the seating surface length can be reduced.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. However, parts having the same structure as that of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 4 is a side sectional view schematically showing the lifted state of the seat lifter of the vehicle seat.

  As shown in FIG. 4, the vehicle seat 14 according to the second embodiment is shown by only the seat cushion 2 without the seat back 3 (see FIG. 1). The seat cushion 2 is the same as that of the first embodiment. A seat frame 21, a cushion pan 22, a cushion pad 23, a seat skin 24 and a seat lifter 5 are provided. Also in this embodiment, a seat slide device 6 is provided. Also in the vehicle seat 14, a seating surface length variable mechanism M is provided that changes the amount of deformation of the cushion pad 23 in the front-rear direction as the seat lifter 5 moves up and down.

  Here, the second embodiment is mainly different from the first embodiment in that the seating surface length varying mechanism M is composed of a spring member 7 that is a first elastic member and a wire 8 that is a long member. It is. That is, one end of the spring member 7 is attached to the front end 22 f of the cushion pan 22 and the other end is attached to the pressing member 73. One end of the wire 8 is attached to a support portion 82 provided on the seat frame 21, and the other end is attached to the pressing member 73, and is engaged with a pulley 81 that is rotatably supported at an intermediate portion. The pressing member 73 is coupled to the inside of the front end portion 23F of the cushion pad 23.

  Next, changes in the seating surface length when the seat lifter 5 is operated will be described with reference to FIG.

  When the switch (not shown) is turned on, the drive device is activated, and the front and rear link mechanisms 51 and 52 extend upward. Then, the cushion pan 22 supported by the upper ends of the link mechanisms 51 and 52 rises. Along with this, the cushion pad 23 laid on the cushion pan 22 and the seat skin 24 covering the outer surface of the cushion pad 23 are formed. It moves upward and the seat surface 2S of the seat cushion 2 rises.

  Since the tension is applied to the wire 8 by the upward movement of the link mechanisms 51 and 52, the pressing member 73 connected to the front end of the wire 8 is pulled toward the rear of the vehicle by the wire 8 so as to compress the spring member 7. . Since the pressing member 73 is fixed inside the front end portion 23F of the cushion pad 23, the pressing member 73 is pulled rearward together with the pressing member 73.

  Thus, when the cushion pad 23 rises, the seating surface length variable mechanism M acts and the front end portion 23F of the cushion pad 23 is compressed and deformed toward the rear of the vehicle, so that the longitudinal length of the seating surface 2S is shortened.

  Below, the effect by this embodiment is demonstrated.

(1) The seating surface length varying mechanism M connects the front end 22f of the seat cushion pan 22 and the inside of the front end 23F of the seat cushion pad 23 to the inside of the front end 23F of the seat cushion pad 23. A spring member 7 that is a first elastic member that can expand and contract in the vehicle longitudinal direction, and a non-stretchable long member that has one end attached to the front end of the spring member 7 and the other end attached to the seat slide device 6 It consists of the wire 8 which is. Therefore, since the pulling length of the wire 8 accompanying the rising of the seat lifter 5 is accurate corresponding to the rising height of the seat lifter 5, the amount of shortening of the seating surface length corresponding to the rising height of the seat cushion 2 is accurately grasped. can do. Further, since the first elastic member is the spring member 7, when the seat cushion 2 is lowered, the spring member 7 can be extended and can be reliably restored to the original seat surface length.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. However, portions having the same structure as those of the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.

  FIG. 5 shows a third embodiment of the present invention, and is a side cross-sectional view schematically showing a raised state of a seat lifter of a vehicle seat.

  As shown in FIG. 5, the vehicle seat 15 of the third embodiment is shown by only the seat cushion 2 without the seat back 3 (see FIG. 1), and this seat cushion 2 is the same as that of the first embodiment. A seat frame 21, a cushion pan 22, a cushion pad 23, a seat skin 24 and a seat lifter 5 are provided. Also in this embodiment, a seat slide device 6 is provided. Even in the vehicle seat 15, the seat surface length variable mechanism M is provided that changes the amount of deformation of the cushion pad 23 in the front-rear direction as the seat lifter 5 moves up and down.

  Here, the third embodiment is mainly different from the first embodiment in that the seating surface length variable mechanism M is made of an elastic support member 9 that is a second elastic member and a non-stretchable wire that is a long member. 10 and so on.

  The elastic support member 9 has a base end portion 9 a attached to the cushion pan 22 and an upper surface 9 u on the distal end side adhered to the lower surface of the front end portion 23 F of the cushion pad 23.

  The elastic support member 9 is formed in a flat plate shape having a predetermined thickness by using a flexible synthetic resin, and the base end portion 9a is coupled to the front end 22f of the cushion pan 22 so that the tip end portion 9b is connected to the free end portion. It is attached like a cantilever. At this time, the elastic support member 9 formed in a plate shape is arranged in a substantially horizontal direction with the seat lifter 5 lowered.

  Then, one end of the wire 10, which is a non-stretchable long member, is coupled to the distal end portion 9 b of the elastic support member 9, and the other end is fixed to a position below the elastic support member 9 of the seat frame 21. It is bound to. At this time, the wire 10 is routed in a tensioned state when the sheet lifter 5 is in the lowered position.

  Below, the effect by 3rd Embodiment is demonstrated.

  According to the vehicle seat 15 of the third embodiment, since the seating surface length variable mechanism M is configured by the elastic support member 9 and the wire 10, when the seat lifter 5 is lifted, the elastic support member 9 becomes the cushion pad 23. The front end portion 23 b of the elastic support member 9 is restrained to the seat frame 21 side by the wire 10.

  For this reason, the elastic supporting member 9 is curved downward as a whole because the proximal end portion 9a side is lifted in a state where the distal end portion 9b to which the wire 10 is coupled is left behind. Accordingly, the front end portion 23F of the cushion pad 23 bonded to the elastic support member 9 is pulled downward and rearward, and the seating surface length L (see FIG. 2) is shortened. Thereby, the vehicle seat 15 of the third embodiment has the same effects as the vehicle seat 1 of the first embodiment, and the adjustment work of the height and length of the seating surface 2S according to the physique is easy. And maintain good sitting comfort.

  In particular, in this embodiment, since the elastic support member 9 can support the front end portion 23F of the cushion pad 23, the strength of the front end of the seat cushion 2 is always secured and the sitting comfort is improved regardless of the lifted position of the seat lifter 5. can do.

  Even in the present embodiment, when the seat lifter 5 is lowered, the tensile force due to the wire 10 is lost, so the front end 23F of the cushion pad 23 returns to the initial state by the elastic force of the elastic support member 9, The seating surface length L is extended along the large passenger.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described. However, about the site | part of the same structure as the said 1st-3rd embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 6 is a side sectional view schematically showing a lowered state of the seat lifter of the vehicle seat according to the fourth embodiment of the present invention.

  As shown in FIG. 6, the vehicle seat 16 of the fourth embodiment is shown by only the seat cushion 2 with the seat back 3 (see FIG. 1) omitted. The seat cushion 2 is the same as that of the first embodiment. A seat frame 21, a cushion pan 22, a cushion pad 23, a seat skin 24 and a seat lifter 5 are provided. Also in this embodiment, a seat slide device 6 is provided. Even in the vehicle seat 16, a seating surface length varying mechanism M is provided that changes the amount of deformation of the cushion pad 23 in the front-rear direction as the seat lifter 5 moves up and down.

  Here, the fourth embodiment is mainly different from the first embodiment in that the seat surface length variable mechanism M is engaged with a slide member 11 configured to be movable in the vehicle front-rear direction and the slide member. It is comprised from the guide member guided to the front-back direction.

  The slide member 11 is disposed along the vehicle front-rear direction, and the front end surface of the spherical enlarged diameter portion 111 formed on the front end portion 11a is fixed to the inside of the front end portion 23F of the cushion pad 23, and the rear portion of the slide member 11 is fixed. It extends rearward from the cushion pan 22 and is arranged on the inner side in the vehicle width direction of the guide member 12.

  The guide member 12 is curved in an arc shape when viewed from the side, and a guide groove 121 is formed inward. The guide groove 121 acts as a track portion that moves and guides the slide member 11 backward as the seat lifter 5 is raised. Specifically, a guide pin 13 protruding laterally is provided at the rear portion of the slide member 11, and the guide pin 13 is slidably inserted into and engaged with the guide groove 121 of the guide member 12.

  Next, changes in the seating surface length when the seat lifter 5 is operated will be described with reference to FIG.

  When the switch (not shown) is turned on, the drive device is activated, and the front and rear link mechanisms 51 and 52 extend upward. Then, the cushion pan 22 supported by the upper ends of the link mechanisms 51 and 52 rises. Along with this, the cushion pad 23 laid on the cushion pan 22 and the seat skin 24 covering the outer surface of the cushion pad 23 are formed. It moves upward and the seat surface 2S of the seat cushion 2 rises.

  Then, the slide member 11 also rises. However, since the guide pin 13 is locked in the guide groove 121 of the guide member 12, the slide member 11 moves to the rear of the vehicle as the seat cushion 2 rises. Since the front end surface of the spherical enlarged diameter portion 111 is fixed inside the front end portion 23F of the cushion pad 23, the front end portion 23F of the seat cushion pad 23 is also pulled rearward by the rearward movement of the slide member 11, and the seat The seating surface length of the cushion 2 is also reduced.

  Below, the effect by 4th Embodiment is demonstrated.

  The vehicle seat 1 of the fourth embodiment has the same effects as those of the first to third embodiments, makes it easy to adjust the height and length of the seating surface 2S according to the physique, and is favorable. Sitting comfort can be maintained.

  Even in the present embodiment, when the seat lifter 5 is lowered, the slide member 11 is pushed forward by the guide groove 121, so that the front end portion 23F of the cushion pad 23 is elastically restored to the initial state, and a large occupant is accommodated. The seating surface length L will be extended so as to follow.

  By the way, although the vehicle seat of the present invention has been described by taking the first to fourth embodiments as examples, the present invention is not limited to these embodiments, and various other embodiments are adopted without departing from the gist of the present invention. be able to. For example, the long member of the second and third embodiments is not limited to the wires 8 and 10 and may be a link mechanism.

It is sectional drawing which looked at the vehicle seat concerning 1st Embodiment of this invention from the side. It is sectional drawing of the vehicle seat which shows the state which act | operated the seat lifter of FIG. It is a top view of the vehicle seat of FIG. It is sectional drawing which looked at the seat cushion of the vehicle seat concerning 2nd Embodiment of this invention from the side. It is sectional drawing which looked at the seat cushion of the vehicle seat concerning 3rd Embodiment of this invention from the side. It is sectional drawing which looked at the seat cushion of the vehicle seat concerning 4th Embodiment of this invention from the side.

Explanation of symbols

M ... Seat surface length variable mechanism 1, 14, 15, 16 ... Vehicle seat 2 ... Seat cushion 2S ... Seat surface 4 ... Vehicle body floor 5 ... Seat lifter 6 ... Seat slide device 7 ... Spring member (first elastic member)
8 ... Wire (long member)
9: Elastic support member (second elastic member)
10 ... Wire (long member)
DESCRIPTION OF SYMBOLS 11 ... Slide member 12 ... Guide member 13 ... Guide pin 21 ... Seat frame (seat slide apparatus)
22 ... Seat cushion pan 23 ... Seat cushion pad 23F ... Front end 24 ... Seat skin 24E ... End edge 30 ... Connecting rod (seat slide device)
51, 52 ... Link mechanism 61 ... Lower rail (seat slide device)
62 ... Upper rail (seat slide device)
73 ... Pressing member 81 ... Pulley 82 ... Supporting part 111 ... Spherical diameter enlarged part 121 ... Guide groove

Claims (9)

A vehicle seat having a seat cushion and a seat back, wherein the seat cushion is configured to be movable up and down with respect to a floor of a vehicle body;
A seat lifter that is supported by a seat slide device provided at the lower end on the floor and configured to be extendable in the vehicle vertical direction;
A seat cushion pan that is attached to the upper end of the seat lifter and forms the skeleton of the seat cushion;
A seat cushion pad provided on the seat cushion pan and elastically deformable;
A seat skin covering the seat cushion pad;
When the seat cushion covered with the seat skin rises, the seat surface length variable mechanism that changes the front and back length of the seat cushion,
When the seat lifter is extended and the seat cushion pan, the seat cushion pad, and the seat cover are raised, the seat surface length variable mechanism acts and the front end of the seat cushion pad is compressed toward the rear of the vehicle. A vehicle seat characterized in that the front and rear length of the seat cushion is reduced. The seating surface length variable mechanism is a seat skin covering a front end portion of the seat cushion pad,
As the seat lifter extends upward and the seat cushion pan, seat cushion pad, and seat skin rise, the front edge of the seat cushion pad is compressed rearward by pulling the leading edge of the seat skin downward. The vehicle seat according to claim 1, wherein the vehicle seat is configured as described above.   The front end position of the seat cushion pan is disposed behind the front end position of the seat cushion pad, and the front edge of the seat skin is attached to the seat slide device. Vehicle seat.   The vehicle seat according to claim 3, wherein both side portions in the vehicle width direction of the front edge of the seat skin are attached to the seat slide device. The seating surface length variable mechanism is
A first elastic member that is extendable in the vehicle front-rear direction by connecting the front end of the seat cushion pan and the inside of the front end of the seat cushion pad inside the front end of the seat cushion pad, and one end of the first cushion member The vehicle seat according to claim 1, wherein the elastic member is attached to a front end, and the other end is a non-stretchable long member attached to the seat slide device.   The vehicle seat according to claim 5, wherein the first elastic member is a spring member. The seating surface length variable mechanism is
A second elastic member configured to be elastically deformable downward at a front end portion of the seat cushion pad, and one end attached to the front end of the second elastic member and the other end attached to the seat slide device The vehicular seat according to claim 1, wherein the vehicular seat is made of an elongated member having a property.   The vehicle seat according to claim 7, wherein the second elastic member is a flexible synthetic resin. The seating surface length variable mechanism is
A slide member that is provided inside the front end portion of the seat cushion pad so as to be movable in the longitudinal direction of the vehicle, and whose front end is attached to the inside of the front end portion of the seat cushion pad, and the slide member can be slid The vehicle seat according to claim 1, further comprising: a guide member that is supported by the guide member and that slides the slide member as the seat lifter extends and moves the slide member toward the rear of the vehicle.

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