JP5874574B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat having a lifter mechanism that can adjust the height of a seat cushion with respect to a floor surface, and a cushion length variable mechanism that can adjust the longitudinal length of the seat cushion.

  Conventionally, a vehicle seat equipped with a lifter mechanism capable of adjusting the height of a seat cushion with respect to a floor surface is known (Patent Document 1). The lifter mechanism is configured to lift the seat cushion to the upper front side or to drop the rear lower side with respect to the floor surface by using the movement of the four-bar link.

JP 2011-31652 A

  However, the seat cushion cannot be adjusted to the optimum state according to the occupant's physique only by the height adjustment by the lifter mechanism as described above. Therefore, a separate sliding device that can adjust the front and rear position of the seat cushion and a variable mechanism that can adjust the cushion length of the seat cushion are provided on the vehicle seat. Rather, the operation becomes troublesome. The present invention was devised to solve the above problems, and the problem to be solved by the present invention is that the seat cushion can be adjusted to an appropriate state according to the occupant's physique by a simple operation. There is to do.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
1st invention is a vehicle seat which has a lifter mechanism which can adjust the height with respect to the floor surface of a seat cushion, and a cushion length variable mechanism which can adjust the front-and-rear length of a seat cushion, The lifter mechanism, It has an interlocking device that allows the cushion length variable mechanism to move together. In conjunction with the operation of lowering the height of the seat cushion by the lifter mechanism, the interlocking device increases the front and rear length of the seat cushion by the variable cushion length mechanism, and the operation of raising the height of the seat cushion by the lifter mechanism. The front and rear length of the seat cushion is shortened by a variable length mechanism.

  According to the first aspect of the present invention, when the size of the seated occupant is large, the interlocking device performs the adjustment for lowering the seat cushion height and the adjustment for extending the front and rear length of the seat cushion together. Thus, the seat cushion is adjusted to an appropriate state suitable for the occupant's physique. Even when the size of the seated occupant is small, the above-mentioned interlocking device makes the adjustment of raising the seat cushion seat height and the adjustment of shortening the front and back length of the seat cushion together, so that the seat cushion It is adjusted to an appropriate state that suits the physique. In this way, the two types of mechanisms that are adjusted according to the physique of the occupant are moved together in the direction that serves the same purpose by the interlocking device, so that the seat cushion can be moved by a simple operation. It can be adjusted to an appropriate state according to the physique.

  According to a second invention, in the first invention described above, the interlocking device is configured as a link mechanism that connects the lifter mechanism and the cushion length variable mechanism in a state capable of transmitting power, and the height of the seat cushion is increased by the lifter mechanism. The movement to be raised and lowered is transmitted to the cushion length variable mechanism so that the longitudinal length of the seat cushion is shortened or lengthened.

  According to the second aspect of the invention, the interlock device is configured as a link mechanism that mechanically connects the lifter mechanism and the cushion length variable mechanism, so that the interlock device uses a complicated structure such as an electrical control device. It can be simply realized without any problems.

  The third invention is the following configuration in the second invention described above. The lifter mechanism is configured as a four-bar linkage mechanism that connects the seat cushion to the base on the floor with a pair of front and rear swing links. The variable cushion length mechanism is configured as a support link that is swingably disposed at the bottom of the seat cushion so that the front portion of the seat cushion can be lifted upward. The interlock device is configured as a connecting link that connects the front swing link constituting the lifter mechanism and the support link of the cushion length variable mechanism in a state where power can be transmitted.

  According to the third aspect of the invention, the lifter mechanism is configured by a four-link mechanism, and the interlocking device is configured as a connection link that connects the front swing link of the four-link mechanism and the support link of the cushion length variable mechanism. Thus, the lifter mechanism and the interlocking device can be realized with a simple structure.

  The fourth invention is the following structure in the third invention described above. The lifter mechanism has a configuration in which the height of the seat cushion is lowered by a movement in which the four-bar linkage mechanism is tilted backward, and the height of the seat cushion is increased by a movement in which the four-bar linkage mechanism is raised to the front side. . The connecting link constituting the interlocking device is capable of transmitting power between the extending portion extending downward from the connecting point with the base of the front swing link constituting the four-bar linkage mechanism and the support link of the variable cushion length mechanism. It is the structure connected to.

  According to the fourth aspect of the invention, when the occupant's physique is large, the seat cushion can be moved rearward in accordance with the movement of lowering the height of the seat cushion, and the seat cushion is further matched to the occupant's physique. It can be adjusted to an appropriate state. Moreover, even if the four-bar linkage mechanism is of a type that is tilted backward, the movement in which the front swing link is tilted backward is lifted upward to the support link via the connecting link. The front portion of the seat cushion can be lifted upward.

It is the perspective view which showed schematic structure of the vehicle seat. It is a disassembled perspective view of the principal part of a lifter mechanism. It is a principal part perspective view of a lifter mechanism. It is the side view showing the state where the height of the seat cushion was raised. It is the side view showing the state where the height of the seat cushion was lowered.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the vehicle seat 1 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the vehicle seat 1 of the present embodiment is configured as a driver's seat of an automobile, and includes a seat back 2 that serves as a backrest for a seated occupant and a seat cushion 3 that serves as a seating portion. It is prepared for. The vehicle seat 1 includes a slide device 4 that can adjust the position of the seat cushion 3 in the front-rear direction, a lifter mechanism 10 that can adjust the height of the seat cushion 3 relative to the floor surface F, and the longitudinal length of the seat cushion 3. A cushion length variable mechanism 20 (support link 21) capable of adjusting the height, and an interlocking device 30 (connection link 31) that allows the lifter mechanism 10 and the cushion length variable mechanism 20 to move together are provided.

  The above-described slide device 4 is provided in a pair of left and right between the bottom portion of the seat cushion 3 and the floor surface F, and each slide guide is slidably lockable with respect to the floor surface F in the seat front-rear direction. It is the composition to do. Specifically, the slide device 4 is slidable in the longitudinal direction (seat front-rear direction) with respect to the pair of left and right lower rails 4A installed on the floor surface F and extending in the front-rear direction of the seat. A pair of left and right upper rails 4B that are assembled in a state and fixed to the bottom of the seat cushion 3, and a locking device (not shown) that is provided on each upper rail 4B and can lock the slide of each upper rail 4B by engagement with each lower rail 4A. The release lever 4D is configured to be capable of simultaneously releasing the lock states of these lock devices.

  The release lever 4D is bent in a substantially U shape in plan view, each end is connected to each locking device (not shown) so as to be able to be released, and the central operation portion is the front lower part of the seat cushion 3 It is provided as an extended state. The release lever 4D is configured such that the locked state of the lock devices can be simultaneously released by a seated occupant gripping and pulling up an operation portion extending to the front lower portion of the seat cushion 3. ing.

  The above-described slide device 4 is normally configured such that each of the lock devices (not shown) is normally held in a locked state by an urging force so that the slide of each upper rail 4B is locked. The slide position is fixed and held. In each slide device 4, when the seated occupant (user) pulls up the operation portion of the release lever 4 </ b> D, the lock state of each lock device is released and the seat cushion 3 can be freely installed in the front-rear direction of the seat. It can be switched to a state where it can be adjusted by sliding.

  Then, by adjusting the installation position of the seat cushion 3 to a desired slide position and stopping the lifting operation of the release lever 4D, the release lever 4D is returned to the original position and the slide device 4 is slid and locked again. The seat cushion 3 is returned to a fixed state at the adjusted slide position. The basic structure of the slide device 4 described above is the same as that disclosed in a document such as Japanese Patent Application Laid-Open No. 2010-221935, and a detailed description thereof will be omitted.

  The lifter mechanism 10 is provided in a pair of left and right at each position interposed between each upper rail 4B and the seat cushion 3 of the slide device 4 described above, and swings the seat cushion 3 and each upper rail 4B forward. It is configured as a four-bar linkage mechanism that connects the link 11 and the rear swing link 12. The lifter mechanism 10 raises and lowers the height of the seat cushion 3 with respect to the floor surface F by moving the front swing links 11 and the rear swing links 12 back and forth. It can be configured. Specifically, each of the front swing links 11 and the rear swing links 12 described above includes the side frames 3F1 of the cushion frame 3F constituting the skeleton of the seat cushion 3, and the top plate of each upper rail 4B. An upper end and a lower end are pivotally attached to the upright plate-like bracket 4C coupled on the surface so as to be rotatable in the front-rear direction. Here, each bracket 4 </ b> C corresponds to a “base” of the present invention.

  The cushion frame 3F includes a pair of left and right side frames 3F1 which are long in the front-rear direction of the seat, which forms a skeleton on both the left and right sides of the seat cushion 3, and a horizontally long plate-shaped front panel 3F2 which forms a skeleton of the front edge of the seat cushion 3. Are assembled in a substantially U-shape in plan view. Each side frame 3F1 is formed of a pressed steel plate that is cut into a long shape in the front-rear direction of the sheet, and is arranged in an upright direction so as to face each other in the sheet width direction. The front panel 3F2 is formed of a pressed steel plate that is cut into a long shape in the sheet width direction. The front panel 3F2 is bridged between the upper surfaces of the front edge portions of the side frames 3F1 described above, and is firmly integrated by welding. It is assumed that it is connected to.

  As shown in FIGS. 4 to 5, the swing links 11 on the front side of the lifter mechanism 10 are such that their upper ends can be rotated back and forth on the front portions of the side frames 3F1 described above by the rotation shaft 11A. The lower end portions thereof are pivotally attached to the front portions of the upright plate-like brackets 4C connected to the upper portions of the upper rails 4B by the rotation shaft 11B so as to be rotatable in the front-rear direction. Further, the rear swing links 12 are pivotally attached at their upper ends to the rear portions of the side frames 3F1 described above by the rotary shaft 12A, and the lower ends thereof are connected to the rotary shaft. 12B is pivotally attached to the rear portion of each bracket 4C described above so as to be rotatable in the front-rear direction.

  Each rotating shaft 12A that connects the upper end portion of each of the swing links 12 on the rear side to each side frame 3F1 is fitted into each end portion of a reinforcing pipe 13 made of a circular steel pipe that is spanned between them. They are welded together and joined together. As a result, the braking force that stops the rotation of the swing link 12 on the rear side of the vehicle shown on the left side as shown in the drawing by the braking force of the drive unit 40 with brake, which will be described later, is applied to the inside of the vehicle via the reinforcement pipe 13. The force is also transmitted to the rear swing link 12 so that both rear swing links 12 exert a force to support the seat cushion 3 from below when the rotation is stopped.

  The front swing links 11 and the rear swing links 12 described above are provided so as to swing back and forth in an angle region inclined backward from the upright state. As shown in FIGS. 2 to 3, the movable region of the front swing link 11 and the rear swing link 12 is within a long hole 12 </ b> C formed in the rear swing link 12 outside the vehicle. The slide pin 3A2 provided integrally with the side frame 3F1 on the same side is set as an angular region where the slide pin 3A2 can slide. The long hole 12C is formed in an arc shape drawn around a rotation shaft 12A that is a rotation center on the upper end side of the rear swing link 12, and by the movement of the rear swing link 12 rotating, The slide pin 3A2 passed through the hole is slid, and the rotation of the rear swing link 12 in that direction is locked at a position where the slide pin 3A2 hits one or the other end of the hole. ing.

  With the above configuration, as shown in FIG. 4, the lifter mechanism 10 moves the seat cushion 3 to the front upper side by the movement of the front swing links 11 and the rear swing links 12 raised to the front side. The seat cushion 3 can be lifted and moved to the upper limit position shown in FIG. By moving to the upper limit position, the seat cushion 3 can be adjusted to be lifted to a high position suitable for a relatively small occupant. Further, as shown in FIG. 5, the lifter mechanism 10 sinks the seat cushion 3 to the rear lower side by the movement in which the respective swing links 11 on the front side and the swing links 12 on the rear side are tilted backward. Thus, the seat cushion 3 can be moved to the lower limit position shown in FIG. By the movement to the lower limit position, the seating height of the seat cushion 3 can be adjusted to sink to a lower position suitable for a relatively large occupant.

  As shown in FIGS. 1 to 3, the lifter mechanism 10 described above is configured so that each front-side swing link is operated by pulling up or pushing down the height adjustment lever 5 provided on the side of the seat cushion 3 outside the vehicle. 11 and each rear swing link 12 are operated so as to be raised to the front side or to be sunk to the rear side. Specifically, when the height adjustment lever 5 is operated to be raised and lowered, the amount of operation movement is transmitted to the swing link 12 on the rear side outside the vehicle via the drive unit with brake 40 and the gear coupling mechanism 50. The front swing links 11 and the rear swing links 12 are rotated in the same direction at the same time. Further, the lifter mechanism 10 is configured so that the rear swing link 12 on the outer side of the vehicle is prevented from rotating by the braking force of the drive unit 40 with a brake before or after the height adjustment lever 5 is operated. It is held in a state where rotation is stopped at the position.

  As shown in FIGS. 2 to 3, the brake-equipped drive unit 40 is formed in a substantially cylindrical shape and is integrally coupled to the outer surface of the side frame 3 </ b> F <b> 1 outside the vehicle of the seat cushion 3. Is provided. The drive unit 40 with a brake has an outer cylindrical portion of the cylinder as an input shaft 41 that is integrally fitted and assembled to the height adjustment lever 5, thereby serving as a rotation shaft when the height adjustment lever 5 is operated. It is supposed to function. The operating force (rotational power) of the height adjusting lever 5 input to the input shaft 41 extends in the axial direction from the center via a transmission function portion 42 provided in the cylinder of the drive unit 40 with brake. It is output from the output shaft 43 and transmitted to the gear coupling mechanism 50.

  The input shaft 41 described above is normally in a state in which an urging force is applied toward the neutral position that is the initial position, and at the initial stage before receiving the input from the height adjustment lever 5, the height adjustment lever 5 is held in a neutral position with a horizontal posture. Further, the input shaft 41 is returned to the neutral position and held by the above-described bias when the hand is released after the height adjusting lever 5 is operated in either the up or down direction. . The transmission function unit 42 always stops the rotation of the output shaft 43 by applying a braking force to the output shaft 43 before the operation force (rotational power) of the height adjustment lever 5 is input to the input shaft 41. The operation force (rotation power) generated by raising and lowering the height adjustment lever 5 to the input shaft 41 is input, so that the rotation power is increased and transmitted to the output shaft 43 for output. It has become. In addition, the transmission function unit 42 releases this movement when the height adjustment lever 5 is moved from the position where the height adjustment lever 5 is raised and lowered to the original neutral position, and this return force (rotation power) is applied to the output shaft 43. In this configuration, the output shaft 43 can be held at the rotated position without being transmitted.

  With the configuration of the brake-equipped drive unit 40, the lifter mechanism 10 can be moved up and down in the operated direction through a gear coupling mechanism 50 described later by an operation of raising and lowering the height adjustment lever 5 with a light force. Further, when the height adjusting lever 5 is not operated, the lifter mechanism 10 can be held in a fixed state. Note that the basic structure of the drive unit 40 with brake described above is the same as that disclosed in documents such as Japanese Patent Application Laid-Open No. 2007-137245, and therefore detailed description thereof is omitted.

  As shown in FIG. 2 to FIG. 3, the gear coupling mechanism 50 includes a pinion gear 51 and a sector gear 52 that are assembled so as to be able to transmit power to each other. The pinion gear 51 is integrally connected to the output shaft 43 of the drive unit 40 with brake described above, and the sector gear 52 projects in a gear shape on the front surface of the swing link 12 on the rear side outside the vehicle. The shape is formed. Specifically, the sector gear 52 is formed on the front surface portion of the swing link 12 on the rear side so that the tooth surfaces are arranged in an arc shape centering on the upper rotation shaft 12 </ b> A, and transmits power from the pinion gear 51. By receiving it, the rear rocking link 12 is rotated about the rotating shaft 12A.

  A support arm 3A is provided between the pinion gear 51 and the swinging link 12 on the rear side on which the sector gear 52 is formed so as to suppress the inter-axis repulsive force acting between them. It has been. Specifically, the support arm 3A is formed such that the arm extends in the front-rear direction of the seat, and an end portion on the front side of the seat is integrally fastened and fixed to the side frame 3F1 of the seat cushion 3 by a fixing pin 3A1. Has been. A slide pin 3A2 protruding in the axial direction is coupled to the end of the support arm 3A on the rear side of the seat. The slide pin 3A2 is slidably fitted in an arc-shaped long hole 12C formed in the rear swing link 12 described above. Further, the output shaft 43 of the drive unit with brake 40 through which the pinion gear 51 is passed is inserted in an intermediate portion between the fixed pin 3A1 and the slide pin 3A2 of the support arm 3A. It is in a state where it has been prevented from coming off. As a result, the inter-axis repulsive force accompanying the meshing of the pinion gear 51 and the sector gear 52 between the pinion gear 51 through which the output shaft 43 is passed and the rear swing link 12 through which the slide pin 3A2 is passed. However, it is supported by the support arm 3A spanned between them, and the meshing of the pinion gear 51 and the sector gear 52 is maintained with a strong force.

  As shown in FIG. 1, the cushion length varying mechanism 20 is constituted by a support link 21 formed in a horizontally long plate shape. The left and right side portions of the support link 21 are formed to be bent rearward, and the upper ends of the bent side portions are rotated forward and backward by the support shafts 21A to the front end portions of the side frames 3F1, respectively. It is provided as a pivoted state. As a result, the support link 21 rotates back and forth around the respective support shafts 21A between the posture position depending on the lower side shown in FIG. 4 and the posture position raised on the front side shown in FIG. It is in a state that can be.

  Here, as shown in FIG. 1 and FIGS. 4 to 5, the seat cushion 3 is made of cloth so that the cushion pad 3 </ b> P made of urethane foam is installed on the upper part of the cushion frame 3 </ b> F described above and further covers the entire surface thereof. The skin material 3C is configured to be attached by being applied from the upper side of the cushion pad 3P. The above-described cushion pad 3P is supported from the lower side by the side frames 3F1 and the front panel 3F2 constituting the cushion frame 3F, and the seat cushion is rolled back from the front side of the front panel 3F2. 3 Pa which covers 3 front side parts is made to be the state supported by the surface from the inner side by the horizontally long plate-like support link 21 mentioned above.

  Specifically, as shown in FIG. 4, when the posture position of the support link 21 is in a hanging position with the surface facing the front side, the support link 21 moves the portion 3Pa covering the front side portion of the cushion pad 3P to the rear side. It is designed to be held as a surface supported from the side. At this time, the support link 21 supports the portion 3Pa covering the front side portion of the cushion pad 3P, and the support link 21 hits the stopper 3S provided on each side frame 3F1 from the front side and is locked at the hanging position. It is secured by power.

  Further, as shown in FIG. 5, the support link 21 is raised to the front side from the drooping position to the horizontal position with the surface facing upward, thereby covering the front side portion of the cushion pad 3P described above. The portion 3Pa is raised upward so as to be flush with the general surface (sitting surface) of the cushion pad 3P. The operation of raising the support link 21 to the front side is performed by the interlocking device 30 (connection link 31) that connects each side portion of the support link 21 and each of the front swing links 11 of the lifter mechanism 10. This is performed in conjunction with the movement to move down.

  Specifically, the connecting link 31 described above is on the lower side from the connecting point (rotating shaft 11B) between the left and right bent side portions of the support link 21 and the bracket 4C of the front swing link 11. The extending portions 11 </ b> C extending in the direction are connected to each other so as to be rotatably connected to the extending portions 11 </ b> C. Specifically, each upper end portion of the connection link 31 is pivotally attached to each of the left and right bent side portions of the support link 21 by a connection shaft 31A. Each lower end portion of the connecting link 31 is connected to the lower end portion of the extending portion 11C of the front swing link 11 by the connecting shaft 31B through each long hole 31C formed in the lower end portion and extending in the link length direction. ing. By this connection, each lower end portion of the connection link 31 is pivotally attached to the extension portion 11C of each front swing link 11 in a rotatable and slidable state.

  As a result, as shown in FIG. 4, the connecting link 31 moves to the front swing link as the lifter mechanism 10 moves upward (the front swing link 11 is lifted forward). 11 is operated so as to be pulled downward by the extending portion 11C, and the support link 21 is operated to be dropped to the hanging position. In addition, as shown in FIG. 5, the connecting link 31 moves in accordance with the movement in which the lifter mechanism 10 moves downward (the movement in which each front swing link 11 is tilted rearward). The extending portion 11C is operated so as to be pushed upward, and the support link 21 is operated to be raised to a horizontal position. When the support link 21 is raised to the horizontal position, the portion 3Pa covering the front side portion of the cushion pad 3P is lifted to a state flush with the general surface (sitting surface) of the cushion pad 3P, and the seat cushion 3 The substantial length of the cushion in the front-rear direction is extended forward.

  In the state where the seat cushion 3 is lifted to a high position suitable for a relatively small occupant by the above-described lifter mechanism 10 by the above-described operation structure, as shown in FIG. Since the support link 21 is held in the suspended position via the link 31, the cushion length in the front-rear direction of the seat cushion 3 is adjusted to a short length suitable for a relatively small occupant. It is kept in the state. However, as shown in FIG. 5, the seating height of the seat cushion 3 is lowered to a low position suitable for a relatively large occupant by the lifter mechanism 10 described above, and in conjunction with this movement. The support link 21 is raised to the horizontal position via the connecting link 31 described above, and the cushion length in the front-rear direction of the seat cushion 3 is a long length suitable for a relatively large occupant. It will be in an adjusted state. At this time, the support link 21 supports the lifted portion 3Pa of the cushion pad 3P. The force by which the lifter mechanism 10 is maintained in a state where the lifter mechanism 10 is prevented from rotating by the brake force of the brake-equipped drive unit 40 described above with reference to FIG. Has come to be secured by.

  Thus, in the configuration of the vehicle seat 1 of the present embodiment, the interlocking device 30 (the connecting link 31) that allows the lifter mechanism 10 and the cushion length variable mechanism 20 (the support link 21) to move together is provided. Therefore, when the seated occupant has a large physique, the adjustment for lowering the seating height of the seat cushion 3 and the adjustment for extending the front and rear length of the seat cushion 3 are performed together. It is adjusted to an appropriate state that suits the physique. Even when the size of the seated occupant is small, the adjustment of increasing the seating height of the seat cushion 3 and the adjustment of shortening the front and rear length of the seat cushion 3 by the interlocking device 30 (connection link 31) are performed together. As a result, the seat cushion 3 is adjusted to an appropriate state suitable for the physique of the occupant. As described above, the two types of mechanisms that are adjusted in accordance with the physique difference of the occupant are moved together in a direction that achieves the same purpose by the interlocking device 30 (the connecting link 31), thereby simplifying the operation. Thus, the seat cushion 3 can be adjusted to an appropriate state according to the physique of the occupant.

  Further, by configuring the interlocking device 30 as a link mechanism (connecting link 31) that mechanically connects the lifter mechanism 10 and the cushion length variable mechanism 20, the interlocking device 30 has a complicated structure such as an electrical control device. It can be simply realized without using. Specifically, the lifter mechanism 10 is constituted by a four-link mechanism, and the interlocking device 30 is a connecting link 31 that connects the front swing link 11 of the four-link mechanism and the support link 21 of the cushion length varying mechanism 20. By being configured, the lifter mechanism 10 and the interlocking device 30 can be realized with a simple structure.

  In detail, the lifter mechanism 10 lowers the height of the seat cushion 3 by the movement of the four-bar linkage mechanism being tilted backward, and increases the height of the seat cushion 3 by the movement of the four-bar linkage mechanism raised to the front side. It is configured to raise. Further, the connecting link 31 constituting the interlocking device 30 has an extending portion 11C extending downward from a connecting point with the bracket 4C (base) of each front swing link 11 constituting the four-bar linkage mechanism and a variable cushion length. The support link 21 of the mechanism 20 is connected to a state where power can be transmitted.

  With this configuration, when the occupant has a large physique, the seat cushion 3 can be moved rearward in accordance with the movement of lowering the height of the seat cushion 3, and the seat cushion 3 can be moved further. It can be adjusted to an appropriate state according to the physique. Even if the four-bar linkage mechanism is of a type that is tilted backward, the movement of the front swing link 11 being tilted backward is moved upward to the support link 21 via the connecting link 31. It can be transmitted as a lifting motion, and the front portion of the seat cushion 3 (the portion 3Pa where the cushion pad 3P is lifted) can be lifted upward.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, in the above-described embodiment, as the “lifter mechanism for adjusting the height of the seat cushion with respect to the floor surface” of the present invention, a four-bar linkage mechanism that swings back and forth in an angle region inclined rearward from an upright state The lifter mechanism 10 is exemplified, but the “lifter mechanism” is a four-joint link mechanism that swings back and forth within an angle region inclined forward from the upright state to adjust the height of the seat cushion with respect to the floor surface. It may consist of. Further, the “lifter mechanism” may be a four-bar linkage mechanism that swings in the seat width direction and adjusts the height of the seat cushion with respect to the floor surface. The “lifter mechanism” may be an X-link mechanism that adjusts the height of the seat cushion with respect to the floor surface by a so-called pantograph-type link motion. Further, the “lifter mechanism” may have a direct-acting configuration in which the height of the seat cushion with respect to the floor surface is adjusted by a direct-acting actuator.

  Moreover, in the said Example, although the manual drive structure using the drive unit 40 with a brake was illustrated as a drive and rotation stop means of the lifter mechanism 10, the electric type using the drive force and brake force of an electric motor was illustrated. The drive structure may be adopted. In the above embodiment, the support link 21 capable of adjusting the substantial cushion length of the seat cushion 3 by rotational movement is exemplified as the “cushion length variable mechanism” of the present invention. A sliding variable mechanism that adjusts the cushion length by sliding the sliding member in the front-rear direction with respect to the seat cushion may be used. Further, the “cushion length varying mechanism” may be configured such that the frame structure of the seat cushion is divided so as to be slidable back and forth, and the cushion length can be changed by sliding.

  Moreover, in the said Example, although what was used as the link mechanism (connection link 31) which connects the lifter mechanism 10 and the cushion length variable mechanism 20 to the state which can transmit motive power was illustrated as "the interlocking | linkage apparatus" of this invention, The “interlocking device” may be configured to move the lifter mechanism and the cushion length variable mechanism together by electric control.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Seat cushion 3F Cushion frame 3F1 Side frame 3F2 Front panel 3A Support arm 3A1 Fixing pin 3A2 Slide pin 3S Stopper 3P Cushion pad 3Pa Part 3C Skin material 4 Slide device 4A Lower rail 4B Upper rail 4C Bracket
4D Release lever 5 Height adjustment lever 10 Lifter mechanism 11 Front swing link 11A Rotating shaft 11B Rotating shaft 11C Extension 12 Rear oscillating link 12A Rotating shaft 12B Rotating shaft 12C Long hole 13 Reinforcement pipe 20 Cushion length variable Mechanism 21 Support link 21A Support shaft 30 Interlocking device 31 Connection link 31A Connection shaft 31B Connection shaft 31C Long hole 40 Drive unit with brake 41 Input shaft 42 Transmission function section 43 Output shaft 43A Bush 50 Gear connection mechanism 51 Pinion gear 52 Sector gear F Floor surface

Claims (2)

A vehicle seat having a lifter mechanism capable of adjusting a height of a seat cushion with respect to a floor surface, and a cushion length variable mechanism capable of adjusting a longitudinal length of the seat cushion,
An interlocking device that allows the lifter mechanism and the cushion length variable mechanism to move together;
The interlocking device increases the front and rear length of the seat cushion by the cushion length variable mechanism in conjunction with the operation of lowering the height of the seat cushion by the lifter mechanism, and increases the height of the seat cushion by the lifter mechanism. The front and rear length of the seat cushion is shortened by the cushion length variable mechanism along with the operation ,
The interlock device is configured as a link mechanism that couples the lifter mechanism and the cushion length variable mechanism to a state in which power can be transmitted, and the movement of raising and lowering the height of the seat cushion by the lifter mechanism is variable in the cushion length. It is transmitted to the mechanism, and the length of the seat cushion is shortened or lengthened.
The lifter mechanism is configured as a four-bar linkage mechanism that connects the seat cushion to a base on a floor with a pair of front and rear swing links, and the cushion length variable mechanism is arranged at the bottom of the seat cushion at the front surface of the seat cushion. The support device is configured so as to be swingable so that the portion can be lifted upward, and the interlocking device includes a swing link on the front side constituting the lifter mechanism and the support link of the cushion length varying mechanism. A vehicle seat characterized in that the vehicle seat is configured as a connection link that is connected in a state where power can be transmitted . The vehicle seat according to claim 1,
The lifter mechanism lowers the height of the seat cushion by a movement of the four-bar linkage mechanism tilted backward, and raises the height of the seat cushion by a movement of the four-bar linkage mechanism raised to the front side. The connecting link that constitutes the interlocking device includes an extension portion that extends downward from a connecting point with the base of the front swing link that constitutes the four-bar linkage mechanism, and the cushion length. A vehicle seat characterized in that it is configured to connect the support link of the variable mechanism in a state where power can be transmitted .

Images