JP2006213103A - Seating posture adjusting device of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily provide an optimal seating posture for an occupant of all physical constitutions, without complicating a constitution of a position adjusting mechanism, in a seating posture adjusting device of an automobile having the position adjusting mechanism for adjusting a relative position of an operation means of a vehicle and a seating surface of a seat cushion. <P>SOLUTION: While arranging a slide part 21 between a support member 15 arranged on a floor panel 2 so that the vehicle front side becomes high and the vehicle front side of the seat cushion 11, a link part 22 is arranged between the vehicle front side and the vehicle rear side of the seat cushion 11. An elastic member 70 having a plurality of projection strips 70b, 70b, etc. extending forward and upward to the vehicle from a plate-like base part 70a, is arranged in a cushion part 11a of the seat cushion 11. Thus, a hip point position of the seated occupant satisfies the relationship indicated in the figure 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle seating posture adjusting device that can realize an optimal seating posture for passengers having different physiques.

  2. Description of the Related Art Conventionally, a seating posture adjusting device including a slide mechanism that can move a seat cushion in the vehicle front-rear direction and a lift mechanism that can move the seat cushion in a vertical direction is known.

  For example, as shown in FIG. 23, the seating posture adjusting device includes a slide mechanism 110 provided on two cross members 101, 101 that are long in the vehicle width direction and arranged at a predetermined interval in the vehicle front-rear direction. The lift mechanism 120 includes a link member 121 disposed on the upper rail 112 constituting the slide mechanism 110. Specifically, the slide mechanism 110 extends on the cross members 101, 101 in the vehicle front-rear direction and is arranged side by side in the vehicle width direction, and can slide in the front-rear direction with respect to the lower rail 111. The upper rail 112 is moved in the front-rear direction with respect to the lower rail 111 by operating a first operating lever (not shown) provided on the upper rail 112. It has become.

  The lift mechanism 120 includes a link member 121 that connects an upper rail 112 of the slide mechanism 110 and a lower arm 102 of a seat cushion (not shown). The link member 121 is connected to the one end side of the link member 121 in the vehicle longitudinal direction. It is pivotally supported by the upper rail 112 so that it can rotate. A second operating lever (not shown) is connected to the link member 121. By operating the second operating lever, the link member 121 is pivotally supported by the upper rail 112 to the front and rear of the vehicle. The seat cushion moves forward and upward of the vehicle, or backward and downward of the vehicle.

  The above-described seating posture adjustment device is configured to adjust the front and rear position and the vertical position of the seat cushion by separate operations. For example, as shown in Patent Literature 1, the seat cushion is adjusted in the front and rear direction. Thus, there is also known one that can adjust the position of the seat cushion in the vertical direction.

That is, in Patent Document 1, the upper rail and the lower rail are disposed so that the front side of the vehicle is higher than the rear side of the vehicle with respect to the floor surface, thereby moving the upper rail relative to the lower rail in the front-rear direction. As a result, the seat also moves up and down. In addition, in this Patent Document 1, a seat projecting laterally is provided on the seat, and the pin is moved in the arcuate guide groove in accordance with the longitudinal movement of the seat. The height of the seat surface in the vertical direction is smaller with respect to the amount of forward and backward movement than the position on the rear side of the vehicle so that the surface height changes in a non-linear manner with respect to the front and rear movement of the seat. It is like that.
JP 62-116324 A

  By the way, as for the optimal sitting posture when the occupant is seated on the seat, in the state where the occupant is seated, the sight of the front of the bonnet should be appropriate so that the sight of the occupant is in view, the operation of the brake pedal, etc. It is required that the posture is easy to perform, a comfortable sitting posture, and the like. Here, the relationship between the height of the occupant and the length of the legs is generally a relationship as shown in FIG. 24, that is, a taller person has a longer leg length. In order to satisfy the above requirement, it is necessary to adjust the position of the seating surface of the seat according to the physique.

  That is, in general, the taller the passenger, the longer the foot and the higher the seat height, so it is necessary to move the seat to the rear side of the vehicle and lower the seat surface of the seat. It is necessary to move the seat forward of the vehicle and raise the seating surface of the seat. However, in the case of a tall occupant, as shown in FIG. 24, the ratio of the foot length to the height is larger than that of the short occupant (the ratio of the foot length of the short occupant is shown in the figure). Therefore, if the seating surface is too low, the height of the line of sight will be lower than the appropriate height, and the angle at which the knee bends will be smaller than the appropriate angle, making it impossible to secure a comfortable sitting posture. is there. In the case of a short occupant, if the seat surface is too high, the operability of the pedal deteriorates. Therefore, when a tall occupant and a short occupant are seated, it is necessary to adjust the position so that the seat surface of the seat becomes an appropriate height without moving the seat surface upward or downward. .

  When such position adjustment of the seat is performed by the former conventional apparatus, the passenger can make adjustments to the optimum position by making full use of the two operation levers. Adjustment is difficult, and the adjustment work takes time.

  Further, in the latter conventional apparatus configured so that the height position of the seat changes in accordance with the forward movement of the seat, when the seat is located on the vehicle front side, Although the front / rear position and the vertical position of the seat can be adjusted to the optimal seating position for the occupant by operation, when the seat is located on the rear side of the vehicle, the seat surface is lowered in proportion to the amount of rearward movement. It is not configured to provide an optimal seating posture for a tall occupant simply by moving in the direction.

  In the latter conventional device, if an attempt is made to provide an optimal seating posture as described above for passengers of any physique, including tall passengers, the seat cushion will bend, etc. It is necessary to consider this, and the seat cushion is required to move in a complicated manner, which causes a problem that the mechanism for position adjustment becomes complicated.

  The present invention has been made in view of the above points, and an object of the present invention is to make a seating posture of an automobile provided with a position adjusting mechanism for adjusting a relative position between a vehicle operation means and a seat cushion seat surface. In the adjusting device, an optimal seating posture can be easily provided to passengers of all physiques without complicating the configuration of the position adjusting mechanism.

  In order to achieve the above object, in the seating posture adjusting apparatus for an automobile according to the present invention, the contraction characteristic of the seat cushion is changed according to the relative position in the front-rear direction between the operation means and the seating surface of the seat cushion. did.

  That is, the invention according to claim 1 is a seating posture adjustment of an automobile provided with a position adjusting mechanism capable of adjusting a relative position between a seat cushion seat surface on which an occupant is seated and an operation means on which the occupant operates a vehicle. Intended for equipment.

  Further, the contraction characteristic of the seat cushion that bends downward when the occupant is seated is such that the hip point height of the occupant is a predetermined position determined by the relative position in the front-rear direction of the seat cushion seat surface and the operating means. In addition, it is assumed that a contraction characteristic changing means for changing in association with the relative position is provided.

  With this configuration, the contraction characteristic of the seat cushion changes according to the relative position in the front-rear direction between the seat cushion seat surface and the operation means, and therefore the relative position between the seat cushion seat surface and the operation means is adjusted. Without complicating the configuration of the position adjustment mechanism, it is possible to provide a seating posture that matches the physique of each occupant. That is, the physique of the occupant seated on the seat cushion can be estimated from the relative position in the front-rear direction between the seat cushion seat surface and the operating means, and the seating posture suitable for the occupant can be estimated accordingly. By changing the contraction characteristic of the seat cushion by the contraction characteristic changing means, the hip point height of the occupant is positioned at a predetermined position determined by the relative position.

  Here, the predetermined position means that, for example, when a tall occupant is seated, the hip point is not lowered too much, and when a short occupant is seated, It means the position of the hip point appropriate for the occupant's physique so as not to raise the hip point too much, and the contraction characteristic of the seat cushion is changed so that the hip point is positioned at such a position. Thus, it is possible to provide a sitting posture that matches the physique of each occupant.

  In the above-described configuration, the position adjustment mechanism includes a slide unit that adjusts the front-rear position of the seat cushion, and the contraction characteristic changing unit changes the contraction characteristic of the seat cushion in association with the front-rear position. Preferred (Invention of Claim 2). In this way, by changing the contraction characteristics of the seat cushion according to the front and rear position of the seat cushion seat surface, it is possible to provide a seating posture suitable for each occupant just by moving the seat cushion in the front-rear direction by the sliding means. It becomes possible to do. Thereby, the structure of the position adjustment mechanism of the seat cushion can be simplified.

  Further, the seat cushion may be configured such that the contraction characteristic changes according to the position of the seat cushion moving in the front-rear direction and the up-down direction. That is, the position adjustment mechanism may include a lift unit that adjusts the front and rear position and the vertical position of the seat cushion, and the contraction characteristic changing unit may change the contraction characteristic of the seat cushion in association with the position. (Invention of Claim 3). Accordingly, it is possible to provide a seating posture suitable for each occupant simply by lifting and moving the seat cushion in the front-rear direction and the up-down direction by the lift means, and to simplify the configuration of the position adjustment mechanism of the seat cushion. Can do.

  Further, the seat cushion may be configured such that the contraction characteristic changes according to the position of the seat cushion in the front-rear direction, in which the slide means and the lift means adjust the position of the seat cushion. Invention of Claim 4). In this way, even when the lift unit and the slide unit are configured to be interlocked, a seating posture suitable for each occupant can be provided without making the position adjustment mechanism complicated.

  In the above configuration, the contraction characteristic changing means includes a correction mechanism that corrects the amount of deflection of the seat cushion in conjunction with the back-and-forth movement of the seat cushion seat by the position adjustment mechanism. Invention). In this way, by correcting the amount of deflection of the seat cushion in conjunction with the back and forth movement of the seat cushion seat surface by the correction mechanism, compared with the case where a special cushion material having a predetermined contraction characteristic is used. The predetermined shrinkage characteristic can be surely obtained, and a general cushioning material can be used, so that the cost can be reduced.

  Further, the position adjusting mechanism may include a tilting unit that tilts the seating surface in the front-rear direction corresponding to at least one of the front-rear direction and the vertical direction of the seating surface of the seat cushion. 6 invention). By providing the tilt means in this way, the inclination of the seat cushion seat surface can be adjusted, and a more suitable seating posture can be provided for each occupant. In the apparatus including such a tilting means, it is preferable that the contraction characteristic changing means changes the contraction characteristic of the seat cushion in association with the inclination angle of the seat surface in the front-rear direction (Invention of Claim 7). ). As a result, even when the seat cushion seat surface is tilted by the tilting means, the seat cushion can be deflected so that the seat cushion is in a seating posture suitable for the occupant. It becomes possible to provide an appropriate seating posture more reliably.

  Further, as described above, in the one that changes the contraction characteristic of the seat cushion according to the position of the seat cushion, the movable range of the seat cushion seating surface in the vehicle front-rear direction is changed to the front moving section in order from the vehicle front side, When the vehicle is divided into an intermediate movement section and a rear movement section, the position adjustment mechanism is configured so that at least one of the front movement section and the intermediate movement section has an occupant on the seat surface as the seat surface moves toward the rear of the vehicle. In the rear movement section located behind the hip point, the lowering amount of the hip point relative to the rear movement amount of the seating surface is smaller than the lowering amount in the one movement section. It is preferable to adjust the position of the surface (the invention of claim 8).

  In this way, not only the contraction characteristic of the seat cushion is changed, but also the position of the seat cushion seat surface is adjusted by the position adjustment mechanism, so that the hip point of the occupant seated on the seat cushion is reliably positioned at a predetermined position. It will be. That is, by adjusting the position of the seat cushion seat surface, the seat surface can be reliably positioned at a predetermined height, and by changing the seat cushion contraction characteristics, the seat cushion can bend downward due to the weight of the occupant. By correcting, the hip point can be positioned at a predetermined position.

  Therefore, with the above-described configuration, the hip point of a tall occupant is not lowered too much, and is surely positioned at an optimal predetermined position that can ensure an appropriate eye height, so that an appropriate sitting posture for a tall occupant Can be reliably provided.

  Moreover, since the seat cushion deflection is corrected by changing the contraction characteristics of the seat cushion, the position adjustment mechanism needs to have a complicated configuration in consideration of the deflection and the like. Thus, the position adjusting mechanism can be simplified.

  As described above, according to the vehicle seating posture adjusting apparatus according to the present invention, the hip point of the occupant draws a predetermined locus according to the relative position in the front-rear direction between the operating means for driving operation and the seat surface of the seat cushion. As described above, by changing the contraction characteristic of the seat cushion, a seating posture suitable for each occupant can be obtained without complicating the configuration of the position adjustment mechanism that adjusts the relative position between the operation means and the seat cushion seat surface. It can be easily provided. That is, the position adjusting mechanism is a slide means for adjusting the front and rear position of the seat cushion, a lift means for adjusting the front and rear and the vertical position, or a structure in which the slide means and the lift means are interlocked. However, it is possible to provide a seating posture suitable for the occupant by changing the contraction characteristic of the seat cushion according to the relative position.

  In addition, by providing a correction mechanism that corrects the amount of deflection in conjunction with the front and rear position of the seat cushion seat surface, the seat cushion's shrinkage characteristics can be reliably changed with a cheaper structure, making it suitable for each occupant. It becomes possible to provide.

  Furthermore, by providing a tilt means for tilting the seat surface in the front-rear direction in conjunction with the position of the seat cushion seat surface in the front-rear direction or up-down direction, the tilt angle of the seat surface can be finely adjusted. A seating posture more suitable for each occupant can be provided. In particular, by changing the contraction characteristics of the seat cushion according to the inclination angle of the seat cushion seat surface, it is possible to reliably provide an appropriate seating posture even when the seat seat surface is tilted. Become.

  Further, the position of the seat surface is adjusted so that the descending amount with respect to the rearward movement amount of the occupant's hip point in the rear movement section of the movable area in the front-rear direction of the seat cushion seat surface is smaller than in the intermediate movement section. Thus, an appropriate seating posture can be provided more reliably even for a tall passenger.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the following description of the embodiments is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

(Embodiment 1)
FIG. 1 shows a schematic configuration of a vehicle interior front portion of an automobile V according to a first embodiment of the present invention. A seat 1 for a passenger to sit on is disposed on the floor panel 2 at the front of the vehicle interior, and an instrument panel 3 is provided below the windshield G on the front side of the vehicle. A steering wheel W (operation means) is provided so as to protrude from the instrument panel 3 toward the occupant side, and a pedal 5 (such as a brake pedal) is provided in a space below the instrument panel 3. Operating means) is provided. A roof 6 is provided above the seat 1 so as to continue from the windshield G to the rear of the vehicle. A seat 7 for the rear seat is disposed behind the seat 1.

  As shown in FIG. 1, the seat 1 has a line-of-sight height X such that a front portion of a bonnet (not shown) enters the field of view, even when occupants with different heights are seated. The position of the seat surface in the front-rear direction and the up-down direction, the inclination of the seat surface, and the like are adjustable so that the operability of the pedal 5 is good and the seating posture is easy.

  That is, the seat 1 satisfies the above-described condition even when an occupant of any physique sits down, and as shown in FIG. The occupant is rotated up and down around the center (from the position of the solid line to the position of the dotted line) to adjust the position so that the sight line height is suitable for each occupant having a different physique, for example, The position of the seat 1 in the front-rear direction (relative position in the front-rear direction with respect to the operation means) is configured to be rearward and the position in the vertical direction is lower as the occupant is taller. When the occupant's seating position is changed as shown in FIG. 2, the occupant's hip point moves from P1 to P1 '.

  By the way, when the position of the occupant is rotated around the rotation center 5a of the pedal 5 as described above and the height of the line of sight is adjusted to the height X such that the front side of the bonnet enters the field of view, As shown in FIG. 3, the vertical movement amount of the hip point (Hpt) of a tall occupant (represented by a solid line in the figure) is slightly higher than that of the occupant and the shorter occupant (in the figure). The amount of movement of the hip point in the case of (indicated by a one-dot chain line) is not much different (see the hip point locus indicated by the thick dotted line in the figure). In other words, in the case of a short occupant, the operability of the pedal 5 is taken into consideration so that the hip point is not so high, while in the case of a tall occupant, in order to adjust the height of the line of sight, It is necessary not to lower the hip point too much. Therefore, in the seat 1 of the present invention, the seat surface position is adjusted so that the position of the hip point of the occupant satisfies the relationship shown in FIG.

  Here, with reference to FIG. 6, when a small occupant is seated on the seat 1, that is, the seat surface of the seat 1 is on the vehicle front side in the movable range in the front-rear direction (front movement section A in the figure). When the seating surface of the seat 1 is positioned at an intermediate position in the front-rear direction (in the drawing), the vertical movement amount (lift amount) relative to the front-rear movement amount of the hip point (Hpt) of the occupant By making it smaller than the intermediate movement section B), the hip point of the seated occupant is prevented from becoming too high. On the other hand, when a tall occupant is seated on the seat 1, that is, when the seat surface of the seat 1 is located on the vehicle rear side (rear side movement section C in the figure), the occupant's hip point By making the vertical movement amount (lowering amount) with respect to the front-rear movement amount smaller than when the seat surface of the seat 1 is located in the intermediate movement section B, the hip point of the seated occupant is not lowered so much. To.

  Hereinafter, a specific structure of the sheet 1 will be described in detail.

  As shown in FIG. 4, the seat 1 includes a seat cushion 11 that supports the weight of the occupant from below, a seat back 12 that extends upward from the seat cushion 11 and supports the back of the occupant, and an upper side of the seat back 12. A position adjustment mechanism 20 that moves the entire seat 1 in the vehicle front-rear direction and the vertical direction is provided below the seat cushion 11.

  The seat cushion 11 is provided with a spring or the like inside a cushion material made of urethane or the like, and a cushion portion 11a that bends downward according to the weight of an occupant, and an inner pan for supporting the cushion portion 11a from below. 11b and an outer pan 11c disposed so as to cover the inner pan 11b from below, and the cushion portion 11a, the inner pan 11b and the outer pan 11c are integrally moved in the front-rear direction and the up-down direction. Has been.

  The position adjusting mechanism 20 is provided between the support members 15, 15 that are arranged in parallel in the vehicle width direction so as to be higher on the front side of the vehicle on the floor panel 2 and the outer pan 11 c of the seat cushion 11. And a sliding portion 21 (sliding means) that supports the front side of the seat cushion 11 so as to be slidable in the front-rear direction with respect to the support members 15 and supports the rear side of the seat cushion 11 in the vehicle. The link portion 22 (lift means) is rotatably supported with respect to the member 15. The support member 15 is formed in a substantially U-shaped cross-section with the vehicle front side opening upward, while the vehicle rear side is formed in a substantially rectangular cross-section, and the substantially U-shaped cross-section portion. The slide portion 21 is disposed, and the link portion 22 is pivotally supported by a pin or the like in a substantially rectangular cross section. The support members 15, 15 are fixed to the upper surface of the cross member 4 provided on the floor panel 2 so that the front side of the vehicle is higher.

  Specifically, as shown in FIG. 5A, the slide portion 21 is configured to be movable in the vehicle front-rear direction within the substantially U-shaped cross section of the support member 15. It consists of cylindrical members 21a, 21a (rollers) and a substantially inverted T-shaped connecting member 21b in a front view that connects these cylindrical members 21a, 21a in a rotatable manner. The upper part of the connecting member 21b is pivotally locked by a pin 21c to a bracket part 11d extending downward from the outer pan 11c, and the cylindrical members 21a and 21a are substantially U-shaped cross sections of the support member 15. When the seat cushion 11 is rotated in the longitudinal direction of the vehicle while moving in the section, if the angle of the seat cushion 11 with respect to the support member 15 changes, the seat cushion 11 rotates accordingly.

  On the other hand, as shown in FIGS. 4 and 5, the link portion 22 includes pins 22 b on the rod-like link member 22 a on the outer pan 11 c on the upper end side and on the bracket 15 a provided on the support member 15 on the lower end side, respectively. , 22c, and the link portion 22a is connected to the operation lever 24 through the intermediate member 23. That is, when the link portion 22 rotates the operation lever 24 upward, the intermediate member 23 is pulled forward of the vehicle, and the link member 22a is moved forward of the vehicle about the pin 22c on the support member 15 side. On the other hand, when the operation lever 24 is rotated downward from that state, the intermediate member 23 is pushed rearward of the vehicle and is rotated rearwardly about the pin 22c. . That is, the movable range in the front-rear direction of the seat surface of the seat cushion 11 is determined by the rotatable range of the link portion 22.

  When the seat cushion 11 is moved forward by the movement of the link portion 22 as described above, the seat surface of the seat cushion 11 is inclined toward the front side of the vehicle as shown in FIG. The angle of the knee and ankle of the occupant seated on the seat 1 can be made almost constant regardless of the position of the seat cushion 11 in the front-rear direction. Can keep. Thus, the link portion 22 that changes the inclination of the seating surface of the seat cushion 11 corresponds to the tilting means. Note that FIG. 9 shows the inclination angle of the seat surface with respect to the floor surface, and the greater the angle, the more the vehicle is inclined toward the rear side of the vehicle.

  With the above configuration, when the operation lever 24 is rotated upward, the link portion 22 rotates the link member 22a forward of the vehicle with respect to the support member 15, and the entire seat cushion 11 is directed forward and upward of the vehicle. Move. At this time, in the slide portion 21, the cylindrical members 21 a and 21 a move toward the front of the vehicle in the substantially U-shaped cross-section of the support member 15, whereby the front portion of the seat cushion 11 moves toward the front of the vehicle. . On the other hand, when the operation lever 24 is rotated downward from the upper position, the link portion 22 rotates the link member 22a toward the rear of the vehicle with respect to the support member 15, and the entire seat cushion 11 is directed rearward and downward. To move. At this time, in the slide portion 21, the cylindrical members 21 a and 21 a move in the substantially U-shaped cross-section of the support member 15 toward the rear of the vehicle, and the front portion of the seat cushion 11 moves backward.

  And since the support member 15 which supports the said slide part 21 and the link part 22 from the downward direction is arrange | positioned so that the vehicle front side may become high as mentioned above, the seat cushion 11 moves to the vehicle front. In this case, the hip point of the occupant seated on the seat cushion 11 is positioned upward as it moves forward of the vehicle.

  Here, the deflection characteristic (shrinkage characteristic) of the cushion portion 11a of the seat cushion 11 indicates that the position of the occupant's hip point is the same as that shown in FIG. 6 when the seat cushion 11 is moved by the position adjusting mechanism 20 as described above. It is set so as to be the relationship shown. When the seat 1 is located on the rear side of the vehicle, that is, when a tall occupant is seated, the deflection characteristic is relatively thick, but the weight is heavy. On the other hand, when the seat 1 is positioned on the front side of the vehicle, that is, when a short occupant is seated, the occupant's buttocks are relatively thin and the weight is considered. Can be decided. That is, the deflection characteristic of the cushion portion 11a is determined in consideration of a change in the thickness of the butt, a change in the weight, and the like based on the model body shape set according to the position in the front-rear direction of the seat cushion 11. In FIG. 6, the movement amount of the hip point in the vertical direction corresponds to the hip point height, and the hip point height that satisfies the relationship of FIG. 6 corresponds to the predetermined height.

  Specifically, by configuring the cushion portion 11a as shown in FIG. 4, a predetermined deflection characteristic can be obtained with certainty, and the position of the hip point of the occupant surely satisfies the relationship shown in FIG. become.

  That is, as shown in FIG. 4, an elastic member 70 (made of a rubber material having a plurality of protrusions 70b, 70b,... Formed at the position corresponding to the hip point of the occupant inside the cushion portion 11a of the seat cushion 11). (Shrinkage characteristic changing means) is provided. Specifically, the elastic member 70 is formed by integrally forming a flat base portion 70a and a plurality of protrusions 70b, 70b,... Protruding obliquely upward from the upper surface of the base portion 70a. The protrusion 70b is disposed in the cushion portion 11a so that the extending direction is the front of the vehicle.

  Thus, for example, when the seat 1 is in a seated position for a tall passenger (indicated by a two-dot chain line in FIG. 4), the seat cushion 11 is positioned on the vehicle rear side as shown in FIG. Since the surface is greatly inclined toward the rear of the vehicle, each protrusion 70b of the elastic member 70 is at an angle close to perpendicular to the floor surface. When the occupant sits in this state, the protrusion 70b. Is elastically deformed by receiving a compressive force in the longitudinal direction, and the hip point of the occupant does not sink much downward.

  On the other hand, for example, when the seat 1 is in a seated position of a short occupant (shown by a solid line in the figure), the seat cushion 11 is positioned on the front side of the vehicle, and the inclination of the seat surface is relatively small. Each ridge 70b of the elastic member 70 is in a state of being tilted with respect to the floor surface. When the occupant is seated in this state, each of the ridges 70b receives a force in the direction of further tilting and greatly deforms. Therefore, in this case, the position of the occupant's hip point moves downward greatly compared to the case where the elastic member 70 is not provided.

  Therefore, by providing an elastic member 70 as shown in FIG. 4 that changes the amount of deflection of the cushion portion 11a in accordance with the inclination angle of the seat cushion 11 in the front-rear direction in the cushion portion 11a, the hip point of the occupant Surely satisfies the relationship shown in FIG. That is, even if a simple position adjusting mechanism as shown in FIG. 4 is used, it is possible to reliably provide a seating posture suitable for passengers of all physiques by providing the elastic member 70.

  Here, it will be described based on actual data that the position of the hip point of the occupant satisfies the relationship of FIG. 6 by using the position adjusting mechanism 20 and the elastic member 70. In the following description, for the sake of convenience of explanation, the movement locus of the seat cushion 11 necessary for realizing the relationship of FIG. 6 is obtained, and the description will be made from the viewpoint of whether this locus can be realized by the position adjustment mechanism 20. .

  First, at the ideal hip point position (same as in FIG. 6) as shown in FIG. 7 (a), the occupant model body shape is estimated according to the front / rear position of the seat cushion, that is, the front / rear position of the occupant's hip point. Therefore, the thickness of the buttocks is estimated from the model body shape, and the thickness of the buttocks is reduced from the height of the hip point shown in FIG. As a result, as shown in FIG. 7B, a value obtained by subtracting the thickness of the hip from the height of the hip point, that is, the required height of the seating surface is obtained.

  On the other hand, by considering the model body shape according to the front and rear position of the occupant's hip point, as shown in FIG. 8A, the relationship of the body weight to the front and rear position of the hip point can be obtained. From this relationship, the amount of deflection of the cushion portion 11a and the elastic member 70 alone can be calculated in consideration of the cushion characteristics of the cushion portion 11a of the seat cushion 11 and the deformation characteristics of the elastic member 70. The amount of deflection when the cushion portion 11a and the elastic member 70 are used in combination is determined from the amount (see FIG. 8B). As described above, the deformation amount of the elastic member 70 changes according to the inclination angle of the seating surface shown in FIG.

  Then, depending on the sum of the height of the seating surface in FIG. 7B and the deflection amount in FIG. 8B, the front and rear movement amount and the upward movement amount of the seat cushion 11 as shown in FIG. A relationship can be sought. This relationship is substantially the same as the movement trajectory of the sheet shown in FIG. 4 (indicated by a thick one-dot chain line in the drawing), and by providing the elastic member 70 in the position adjustment mechanism 20 shown in FIG. It can be seen that the position of the occupant's hip point satisfies the relationship shown in FIG.

  With the above configuration, since the relationship shown in FIG. 6 can be realized with respect to the locus of the hip point of the seated occupant, an appropriate seating posture can be provided for occupants of all physiques. That is, even when a short occupant is seated (when the hip point is located in the front movement section A), the occupant's hip point is not so high, so that the height of the line of sight and comfort are reduced. It is possible to ensure the operability of the pedal while ensuring a proper seating posture and to provide an appropriate seating posture. On the other hand, even when a tall occupant is seated (when the position of the hip point is located in the rear movement section C), it is possible to The height of the same line of sight can be maintained, and an appropriate sitting posture can be provided.

  And by changing the contraction characteristic of the cushion part 11b according to the position of the seat cushion 11, even if the position adjustment mechanism 20 of the seat 1 has a simple configuration of the slide part 21 and the link part 22, as described above, It becomes possible to provide a sitting posture suitable for the physique. Moreover, it is possible to easily provide the above-described seating posture only by the operation of the operation lever 24 of the position adjusting mechanism 20, that is, by one operation.

(Embodiment 2)
In the second embodiment, as shown in FIGS. 10 to 12, as the position adjustment mechanism 30, slide portions 31 and 32 are provided on the vehicle front side and the rear side of the seat cushion 11, and the seat cushion 11 is seated on the cushion portion 11 a. A correction mechanism 80 that corrects the amount of deflection in accordance with the position of the surface is provided. In the first embodiment, a slide mechanism is provided on the vehicle rear side of the seat cushion 11 so that the seat cushion 11 extends in the front-rear direction. Since only the difference is that the movement is performed by the motor 33 and the correction mechanism 80 is provided instead of the elastic member 70, only the parts different from the first embodiment will be described in detail below.

  That is, as shown in FIG. 10, the outer pan 11c of the seat cushion 11 is connected to the support member 16 fixed on the floor panel 2 via the slide portions 31 and 32 on the vehicle front side and the rear side. ing. The support member 16 is a member that is long in the vehicle front-rear direction as in the first embodiment, and the vehicle front side is fixed to the upper surface of the cross member 4 so that the vehicle front side is higher. The support member 16 has a cross section that opens upward at a portion corresponding to the movable range of the slide portion 31 on the front side of the vehicle and a portion corresponding to the movable range of the slide portion 32 on the rear side of the vehicle. The substantially U-shaped rail members 16a and 16b are provided, and a portion of the support member 16 where the rail member 16b is provided on the rear side of the vehicle has a predetermined height on the rear side of the seat cushion 11. In other words, the slide portion 32 protrudes upward so that the slide portion 32 is positioned at a predetermined height.

  The rail member 16b on the rear side of the vehicle is disposed so as to be more inclined with respect to the floor surface than the rail member 16a on the front side of the vehicle, and when the seat cushion 11 moves forward of the vehicle, Similarly, as shown in FIG. 9, the seat surface of the seat cushion 11 is configured to be inclined toward the front side of the vehicle. Thus, the knee and ankle angles of the occupant seated on the seat 1 can be made substantially constant regardless of the position of the seat cushion 11 in the front-rear direction, and an easy posture can be maintained. Thus, the rail member 16b and the slide portion 32 that can change the inclination of the seating surface of the seat cushion 11 correspond to a tilting means.

  Since the slide parts 31 and 32 are the same slide mechanism as the slide part 21 of the above-mentioned Embodiment 1, as shown in the cross section in FIG. 11 (a)-(c), detailed description is abbreviate | omitted. Since the slide portion 31 is provided with a motor 33 for moving the seat cushion 11 in the front-rear direction as shown in FIG. 11B, a drive mechanism by the motor 33 will be described below.

  The motor 33 is attached to the lower side of the support member 16 via an attachment member 33a, and the cylindrical members 31a and 31a (rollers) of the slide portion 31 are rotatable via the first gear 34 and the second gear 35. Torque is transmitted to the connecting member 31b that is supported by the motor. Specifically, the connecting member 31b is a flat plate member extending in the longitudinal direction of the support member 16, and its lower surface is formed in a sawtooth shape so as to mesh with the second gear 35, so as to constitute a so-called rack mechanism. It has become. Further, through holes are formed in the upper and lower surfaces of the support member 16 and the lower surface of the rail member 16a so that the second gear 35 can be engaged with the lower surface of the connecting member 31b, and the first holes are formed in these through holes. Two gears 35 are positioned.

  With this configuration, when the motor 33 is driven to rotate, the torque is transmitted to the second gear 35 via the first gear 34 directly connected to the motor 33, and the slide portion 31 engaged with the second gear 35 is connected. The member 31b is moved in the front-rear direction. Thereby, the outer pan 11c connected to the connecting member 31b by the pin 31c also moves in the front-rear direction, and the front-rear position of the entire seat 1 is adjusted. As a matter of course, the movable range in the front-rear direction of the seat surface of the seat 1, that is, the seat cushion 11, is determined by the movable range in the front-rear direction of the slide portion 31.

  In the present embodiment as well, as in the first embodiment, the support member 16 on which the slide portions 31 and 32 are disposed is inclined so that the front side of the vehicle is higher. When moving toward, it moves toward diagonally upward. Therefore, when the occupant is seated on the seat 1 and the seat 1 is moved to the front side of the vehicle, the hip point of the occupant moves obliquely upward.

  And in this embodiment, it is comprised so that the bending characteristic of the seat cushion 11 may be changed according to the position of the seat cushion 11 so that the position of a passenger | crew's hip point may become the relationship shown in FIG. That is, as shown in FIGS. 10 and 12, a plurality (two in the present embodiment) connected to the rotation shaft 83 extending in the vehicle width direction is provided between the inner pan 11b and the outer pan 11c of the seat cushion 11. A correction mechanism 80 is provided which includes the cams 81, 81 and a motor 82 directly connected to the rotary shaft 83. The correction mechanism 80 rotates the cams 81 and 81 by a motor 82 so that the cams 81 and 81 formed in a substantially elliptical shape move the inner pan 11b up and down relative to the outer pan 11c. .

  Here, as shown in FIG. 12, the cushion portion 11a of the seat cushion 11 is a connecting member through which a cover on the seat surface side and the outer pan 11c pass through a through hole provided in the cushion material and the inner pan 11b. 11e, when the inner pan 11b is moved up and down with respect to the outer pan 11c by the cams 81 and 81 of the correction mechanism 80, the thickness of the cushion portion 11a changes accordingly. It is supposed to be. Thus, when the thickness of the cushion part 11a changes, the deflection characteristic of the cushion part 11a also changes depending on the thickness. That is, when the thickness of the cushion part 11a is thin, the amount of deflection downward of the cushion part 11a due to the weight of the occupant is smaller than when the thickness of the cushion part 11a is thick.

  Therefore, by changing the thickness of the cushion portion 11a by the correction mechanism 80 according to the position of the seat cushion 11, the deflection characteristic of the cushion portion 11a is changed, and the position of the hip point of the occupant is changed as shown in FIG. It becomes possible to make the relationship shown in FIG. That is, when the seat cushion 11 is located on the vehicle rear side, the cams 81 and 81 of the correction mechanism 80 are rotated to reduce the thickness of the cushion portion 11a, so that the cushion portion even if an occupant is seated. It is possible to prevent the hip point of a tall occupant from being lowered too much by preventing 11a from being bent too much downward. On the other hand, when the seat cushion 11 is positioned on the front side of the vehicle, the cushion portion 11a is lowered when the occupant is seated by keeping the cushion portion 11a as it is without reducing the thickness. Therefore, it is possible to prevent the hip point of a short occupant from rising too high.

  As described above, by providing the correction mechanism 80 that corrects according to the position of the seat cushion 11, the amount of deflection of the cushion portion 11a of the seat cushion 11 can be changed, and an optimal sitting posture for passengers of all physiques. Can be reliably provided. In addition, by providing the correction mechanism 80 having the above-described configuration, the configuration of the position adjustment mechanism 30 can be simplified, and the cost can be reduced because no special cushion material is used. . Furthermore, since the deflection characteristics of the cushion portion 11a can be changed by controlling the cams 81, 81 with the motor 82, the deflection characteristics of the cushion portion 11a can be finely controlled.

  In order for the position of the hip point of the occupant to satisfy the relationship shown in FIG. 6, the deflection characteristic of the cushion portion 11a is set to, for example, the characteristic shown in FIG. do it. The basis for this will be described below.

  First, at the ideal hip point position (same as in FIG. 6) as shown in FIG. 13 (a), the occupant model body shape is estimated according to the front / rear position of the seat cushion, that is, the front / rear position of the occupant's hip point. Therefore, the thickness of the buttocks is estimated from the model body shape, and the thickness of the buttocks is reduced from the height of the hip point shown in FIG. As a result, as shown in FIG. 13B, a value obtained by subtracting the thickness of the hip from the height of the hip point, that is, the required height of the seating surface is obtained.

  On the other hand, by considering the model body shape according to the front and rear position of the occupant's hip point, the relationship of the body weight to the front and rear position of the hip point can be obtained as shown in FIG. Based on this relationship, when the thickness of the cushion part 11a is changed by the correction mechanism 80 so that the cushion part 11a has a deflection characteristic as shown in FIG. 14B, the cushion part 11a shown in FIG. Based on the sum of the amount of deflection and the height of the seating surface of FIG. 13B, the relationship between the amount of forward and backward movement of the seat cushion 11 and the amount of upward movement as shown in FIG. 14C can be obtained. This relationship is substantially the same as the movement locus of the sheet shown in FIG. 10 (indicated by a thick one-dot chain line in the drawing), and as a result, the position adjusting mechanism 30 shown in FIG. It can be seen that the position of the occupant's hip point satisfies the relationship shown in FIG. 13A by providing the correction mechanism 80 capable of obtaining such a deflection characteristic.

  With the above configuration, since the relationship shown in FIG. 6 can be realized with respect to the locus of the hip point of the seated occupant, an appropriate seating posture can be provided for occupants of all physiques. That is, even when a short occupant is seated (when the hip point is located in the front movement section A), the occupant's hip point is not so high, so that the height of the line of sight and comfort are reduced. It is possible to ensure the operability of the pedal while ensuring a proper seating posture and to provide an appropriate seating posture. On the other hand, even when a tall occupant is seated (when the position of the hip point is located in the rear movement section C), it is possible to The height of the same line of sight can be maintained, and an appropriate sitting posture can be provided.

  And since the seating posture suitable for a passenger | crew's physique as mentioned above can be provided by changing the contraction characteristic of the cushion part 11b according to the position of the seat cushion 11, the position adjustment mechanism 30 of the seat 1 is provided. In addition to the simple configuration of the slide portions 31 and 32, it is possible to easily provide the above-described seating posture only by adjusting the seat cushion 11 in the front-rear direction, that is, by one operation.

  Further, by providing the correction mechanism 80, it is possible to reduce the cost because a special cushioning material whose bending characteristics change is not used, and the rotation of the cams 81 and 81 is controlled by the motor 82. Since the deflection characteristic of the cushion part 11a can be changed, fine control of the deflection characteristic of the cushion part 11a is also possible.

(Embodiment 3)
In the third embodiment, as shown in FIGS. 15 and 16, as the position adjustment mechanism 40, slide portions 41 and 41 are provided on the vehicle front side and the rear side of the seat cushion 11, and from the slide portion 41 on the vehicle rear side. Also, a lift portion 42 for moving the seat cushion 11 up and down is provided on the rear side. The first embodiment is different from the above-described first embodiment in that the slide portion 41 and the lift portion 42 are provided on the vehicle rear side of the seat cushion 11 instead of the link portion. Only the points different from the first embodiment will be described in detail below.

  That is, as shown in FIG. 16 (c), the lift portion 42 provided on the lower rear side of the seat cushion 11 is a plate member 43 that connects the support members 18 and 18 arranged in parallel in the vehicle width direction. A motor 44 disposed on the plate member 43, a gear 45 that is rotated by the motor 44, and a lift member 46 that has an uneven portion 46 a formed so as to mesh with the gear 45. Become. A gear box 44a as a speed reducer is provided between the motor 44 and the gear 45 so that the weight of the seat cushion 11 itself, the weight of the occupant and the like do not directly act on the motor 44. Yes.

  The lift member 46 is provided with a contact flat portion 46b that comes into contact with the lower end of the inner pan 11b of the seat cushion 11 at the upper end of a columnar member, and the uneven portion 46a is formed in the central portion in the axial direction. In addition, the lower end side is inserted through a through hole formed in the plate member 43. A rack mechanism is constituted by the lift member 46 and the gear 45 rotated by the motor 44.

  With this configuration, when the motor 44 is driven to rotate, the gear 45 also rotates, and the lift member 46 meshed with the gear 45 by the concavo-convex portion 46a is moved in the vertical direction.

  Here, the cushion portion 11a of the seat cushion 11 and the inner pan 11b are integrated, and as shown in FIGS. 15 and 16 (a), the inner pan 11b has left and right pins on the front side of the vehicle. The outer pan 11c is connected to the outer pan 11c by means of 47 and 47, and is rotatable with respect to the outer pan 11c.

  With the above configuration, when the lift member 46 moves upward by the rotational drive of the motor 44, the lift member 46 abuts on the lower surface of the inner pan 11b and pushes the cushion portion 11a upward together with the inner pan 11b. On the other hand, when the lift member 46 moves downward from the state, the inner pan 11b and the cushion part 11a move downward.

  In addition, the slide parts 41 and 41 provided on the vehicle front side and the vehicle rear side of the seat cushion 11 have the same structure, and are moved in the front-rear direction by a motor or the like (not shown). Since the slide mechanism and the drive mechanism by the motor are the same as those of the second embodiment, detailed description is omitted, but the cylindrical members 41a and 41a of the slide portions 41 and 41 are provided in the support member 17 having a substantially U-shaped cross section. When the vehicle is moved in the vehicle front-rear direction, the seat cushion 11 moves in the front-rear direction via the outer pan 11 c connected by the pin 41 c and the upper end portion of the connection member 41 b connecting the cylindrical members 41 a, 41 a. Yes. The movable range in the front-rear direction of the seat surface of the seat cushion 11 is determined by the movable range in the front-rear direction of the slide portions 41, 41.

  Also in this embodiment, since the support member 17 is inclined so that the front side of the vehicle becomes higher, when the seat cushion 11 moves toward the front of the vehicle, the support member 17 also moves upward accordingly. ing. Further, the lift portion 43 is configured to lift the vehicle rear side of the seat cushion 11 upward by the lift portion 43 according to the position of the seat cushion 11 in the front-rear direction. The hip point changes forward and upward of the vehicle.

  As described above, when the seat cushion 11 moves to the front of the vehicle by the lift part 43 lifting the vehicle rear side of the seat cushion 11, the seating surface of the seat cushion 11 is the same as in the first and second embodiments. Similarly, as shown in FIG. 9, the vehicle is inclined toward the front side of the vehicle, so that the knee and ankle angles of the occupant seated on the seat 1 can be made almost constant regardless of the position of the seat cushion 11 in the front-rear direction. Can keep an easy posture. In this way, the lift portion 43 that changes the inclination of the seating surface of the seat cushion 11 corresponds to the tilting means.

  In addition, although not particularly illustrated, in this embodiment as well, the cushion member 11a is provided with the same elastic member 70 as in the first embodiment, and the position of the hip point of the occupant is in the relationship shown in FIG. Further, a deflection characteristic of the cushion portion 11a of the seat cushion 11 is set. Thereby, an appropriate seating posture can be provided for passengers of any physique. That is, even when a tall occupant is seated on the seat 1, the height of the occupant's line of sight can be made moderate by preventing the occupant's hip point from being lowered too much, and the height of the occupant is low. Even when the occupant is seated on the seat 1, the operability of the pedal 5 can be ensured by preventing the occupant's hip point from being raised too much.

  In addition, the position of the seat cushion 11 that provides the seating posture as described above can be easily obtained by only one operation of moving the seat cushion 11 in the front-rear direction.

(Embodiment 4)
In the fourth embodiment, the position of the hip point of the occupant seated on the seat 1 is the vehicle front side (front movement section A) and the vehicle rear side (rear movement section C) regardless of the position of the seat cushion 11 in the vehicle front-rear direction. The seat cushion 11 is moved so as to have a constant height, that is, the relationship shown in FIG. 19, and the position adjusting mechanism as shown in FIGS. 50, the only difference is that the slide portion and the guide portion are provided on the vehicle front side and the rear side of the seat cushion 11, and therefore only the portions different from the first embodiment will be described in detail below.

  That is, as shown in FIG. 17, on the floor panel 2, a substantially U-shaped support member 18 extending in the vehicle front-rear direction is provided substantially parallel to the floor panel 2, and the seat cushion 11 On the front side and the rear side of the vehicle, slide portions 51, 51 are provided that move in the front-rear direction within the U-shaped cross section. Since the structures of these slide portions 51 and 51 are the same as those of the first to third embodiments, detailed description is omitted, but the two cylindrical members 51a and 51a that move while rotating in the support member 18 are front surfaces. The connecting member 51b is rotatably connected by a substantially inverted T-shaped connecting member 51b. The connecting member 51d is connected to the upper part of the connecting member 51b via a pin 51c so as to be rotatable in the vehicle front-rear direction.

  A motor 52 for moving the slide portions 51, 51 in the vehicle front-rear direction is provided below the support member 18, and the first gear 53 and the first gear directly connected to the motor 52 are provided. Torque is transmitted to the slide portions 51, 51 through a second gear 54 that meshes with the slide 53. Since the drive mechanism by the motor 52 has the same configuration as that of the second embodiment, the detailed description is omitted. However, the connecting member 51b is a plate-like member that is long in the vehicle front-rear direction, and has a sawtooth on the lower surface thereof. A so-called rack mechanism that converts the rotation of the motor 52 into the linear motion of the slide portions 51, 51 is configured by engaging the second gear 54 with the lower surface. ing.

  On the other hand, as shown in FIG. 18B, a guide plate 55 having a substantially crank-shaped guide hole 55 a is formed along the support member 18 on the vehicle inner side (seat cushion 11 side) of the support member 18. So as to be substantially perpendicular to the floor panel 2. And the guide member 56 is arrange | positioned so that it may move in the guide hole 55a of this guide plate 55, While this guide member 56 is connected with the said connection member 51d at one end side via a pin, On the other end side, the seat cushion 11 is connected to a bracket portion 11d protruding downward from the outer pan 11c.

  With the above configuration, when the motor 52 is rotationally driven, the torque is transmitted to the connecting member 51b of the slide portion 51 via the first gear 53 and the second gear 54, and the connecting member 51b moves in the vehicle front-rear direction. Let At this time, since the two cylindrical members 51a and 51a connected to the connecting member 51b rotate, the movement of the slide portion 51 in the vehicle front-rear direction is not hindered.

  When the slide portion 51 moves in the vehicle front-rear direction, the guide member 56 extends along the guide hole 55a of the guide plate 55 via the connection member 51d connected to the upper portion of the connection member 51b of the slide portion 51. Moving. As a result, the seat cushion 11 connected to the guide member 56 moves corresponding to the shape of the guide hole 55a. Here, as shown in FIG. 17, the guide hole 55a is formed in a substantially crank shape, but as the guide member 56 moves, the connecting portion between the guide member 56 and the connecting member 51d and the connecting member 51d. Since the connecting portions between the connecting member 51b and the connecting member 51b rotate in the vehicle front-rear direction, the guide member 56 moves smoothly in the guide hole 55a. The movable range in the front-rear direction of the seat surface of the seat cushion 11 is determined by the movable range in the front-rear direction in the guide hole 55 a of the guide member 56.

  Although not particularly illustrated, the elastic member 70 as in the first embodiment or the correction mechanism 80 as in the second embodiment is also provided in this embodiment. Since the elastic member 70 and the correction mechanism 80 are the same as those in the first and second embodiments, the description thereof will be omitted, but even when the seat cushion 11 moves along the shape of the guide hole 55a as described above, When the occupant is actually seated, the cushion portion 11 may bend downward due to its weight, and the locus of the hip point as shown in FIG. 19 may not be obtained, so the elastic member 70 or the correction mechanism 80 is provided, By changing the deflection characteristic of the cushion part 11a according to the position of the seat cushion 11, the hip point of the occupant can surely draw a locus as shown in FIG. In FIG. 19, the vertical movement amount of the hip point corresponds to the hip point height, and the hip point height that satisfies the relationship of FIG. 19 corresponds to the predetermined height.

  As described above, as the seat cushion 11 moves in the longitudinal direction of the vehicle, the seat cushion 11 is moved along the shape of the guide hole 55a, and the elastic member 70 as in the first embodiment or the second embodiment is used. By providing the corrective mechanism 80, even when the position adjusting mechanism 50 having the simple configuration as described above is used, the hip point of the occupant can surely draw a locus as shown in FIG. Therefore, the operability of the pedal 5 can be ensured for a short occupant, and the height of the line of sight can be set to an appropriate height for a tall occupant. In contrast, a moderate sitting posture can be provided.

  In addition, when the seat cushion 11 is located on the front side of the vehicle (when located in the front movement section A), the seat cushion 11 has a seating surface so that the height of the occupant's hip point is constant. Since the distance between the occupant and the roof is not reduced by making the height constant, the feeling of pressure on the occupant can be reduced.

  Furthermore, when the seat cushion 11 is located on the rear side of the vehicle (when located in the rearward movement section C), the seat surface of the seat cushion 11 so that the height of the hip point of the occupant is constant. Since the space of the foot of the occupant seated in the rear seat is not narrowed by making the height of the vehicle constant, the feeling of pressure on the foot of the occupant can be reduced.

  In addition, as described above, by making the seat surface height of the seat cushion 11 constant within a predetermined range, the range in which the seat cushion 11 is moved up and down in the position adjustment mechanism 50 can be reduced. The space in the vertical direction required for the vertical movement can be reduced. Thereby, the space around the sheet 1 can be effectively used.

  In addition, the position of the seat cushion 11 that provides the seating posture as described above can be easily obtained by only one operation of moving the seat cushion 11 in the front-rear direction.

  In the present embodiment, when the seat cushion 11 is positioned on the vehicle front side and the vehicle rear side, the height of the seat surface of the seat cushion 11 is made constant. Only when the seat cushion 11 is positioned on the front side of the vehicle, or only when the seat cushion 11 is positioned on the rear side of the vehicle, the height of the seat surface of the seat cushion 11 is made constant. May be.

(Embodiment 5)
In the fifth embodiment, when the seat cushion 11 is positioned on the front side of the vehicle, the position of the hip point of the occupant seated on the seat 1 is lowered, and the seat cushion 11 is positioned on the rear side of the vehicle. The seat cushion 11 is moved so that the position of the hip point is raised, that is, the relationship shown in FIG. 21 is obtained. As shown in FIG. Since only the shape of the guide hole of the guide plate that determines the vertical position with respect to the position in the front-rear direction is different, only parts different from the fourth embodiment will be described in detail below.

  That is, as shown in FIG. 20, a support member 18 is provided on the floor panel 2 so as to be parallel to the floor panel 2 and extend in the vehicle front-rear direction. 11), a guide plate 61 is provided along the longitudinal direction of the support member 18 and perpendicular to the floor panel 2. The guide plate 61 is formed with a substantially S-shaped guide hole 61a.

  By providing the guide hole 61a having such a shape in the guide plate 61, when the slide portions 51 and 51 are moved in the front-rear direction by the motors 52 and 52, the movement of the guide holes 61a via the connection members 51d and 51d is performed. The guide member 56 is transmitted to the guide member 56 disposed therein, and the guide member 56 moves in the guide hole 61a. And since the said seat cushion 11 is connected with the said guide member 56 by the bracket part 11d provided in the outer pan 11c, if this guide member 56 moves the inside of the guide hole 61a, it will follow the shape of the hole 61a. Will move up and down.

  In this embodiment as well, the elastic member 70 as in the first embodiment or the correction mechanism 80 as in the second embodiment is provided, although not particularly illustrated, as in the fourth embodiment. As in the fourth embodiment, even when the seat cushion 11 moves along the shape of the guide hole 61a as described above, when the occupant actually sits, the cushion portion 11 bends downward due to its weight, as shown in FIG. This is because there is a possibility that a correct trajectory cannot be obtained. Therefore, by providing the elastic member 70 or the correction mechanism 80, it is possible to change the deflection characteristic of the cushion portion 11a according to the position of the seat cushion 11, and thereby more reliably the hip point locus as shown in FIG. Can be drawn. In FIG. 21, the vertical movement amount of the hip point corresponds to the hip point height, and the hip point height that satisfies the relationship of FIG. 21 corresponds to the predetermined height.

  As described above, as the seat cushion 11 moves in the longitudinal direction of the vehicle, the seat cushion 11 is moved along the shape of the guide hole 55a, and the elastic member 70 as in the first embodiment or the second embodiment is used. By providing the corrective mechanism 80, the hip point of the occupant can surely draw a locus as shown in FIG. 21, and the operability of the pedal 5 can be ensured for a short occupant and the height is high. The height of the line of sight can be made appropriate for the occupant, and a moderately appropriate seating posture can be provided for occupants of all heights.

  Further, when the seat cushion 11 is located on the front side of the vehicle (when located in the front movement section A), the seat cushion 11 is lowered so that the position of the hip point of the occupant is lowered, The space | interval with the roof 6 can be expanded and the feeling of pressure with respect to this passenger | crew can be reduced.

  Further, when the seat cushion 11 is located on the vehicle rear side (when located in the rear movement section C), the seat cushion 11 is raised so that the position of the hip point of the occupant is raised, It is possible to prevent the rear end portion of the seat cushion 11 or the seat back 12 from coming into contact with the shin portion of the occupant seated in the rear seat, and the space at the foot of the occupant can be expanded. The feeling of pressure on the feet can be reduced.

  In addition, as described above, the range in which the seat cushion 11 is moved up and down in the movement adjustment mechanism 50 can be reduced by making the height of the seat cushion 11 higher than a predetermined level or not lowering below a predetermined level. The space in the vertical direction required for the vertical movement of the seat 1 can be reduced. Thereby, the space around the sheet 1 can be effectively used.

  In addition, the position of the seat cushion 11 that provides the seating posture as described above can be easily obtained by only one operation of moving the seat cushion 11 in the front-rear direction.

  In the present embodiment, when the seat cushion 11 is located on the vehicle front side, the seat cushion 11 is lowered, and when the seat cushion 11 is located on the vehicle rear side, Although the seat cushion 11 is raised, this is not a limitation, and only one of them may be performed.

(Other embodiments)
The configuration of the present invention is not limited to the above-described embodiments, but includes various other configurations. That is, in each of the first to fifth embodiments, the seat cushion 11 is moved in the vehicle front-rear direction to adjust the position suitable for the occupant. Thus, the pedal 5 and the steering wheel W as the operation means may move in the vehicle front-rear direction, and the height and inclination of the seat cushion 11 in the vertical direction may be changed accordingly. As a result, the operability of the pedal 5 and the steering wheel W can be ensured, and a comfortable seating posture and an appropriate eye height can be secured, and an appropriate seating posture can be provided for passengers of all physiques. it can. In this case, the position in the front-rear direction and the amount of front-rear movement of the seat cushion 11 in each of the first to fifth embodiments are represented by the relative position and the relative distance change amount between the seat cushion 11 and the operating means, respectively.

  In the fourth embodiment, the seat cushion 11 has a constant seat surface height in the rearward movement section C of the movable range of the seat cushion 11 in the front-rear direction. As described above, in the rear end portion (the rear end movement section D), the seat surface may be raised as the seat cushion 11 moves rearward. In this way, a moderately appropriate seating posture can be provided to the tall occupant, and the rear end portion of the seat cushion 11 and the seat back 12 can extend along the shin from the back of the occupant's foot in the rear seat. Therefore, the feeling of pressure on the feet of the passenger can be reduced.

  As described above, the vehicle seating posture adjustment device according to the present invention changes the deflection characteristics of the cushion portion according to the position of the seat cushion, thereby simplifying the configuration of the mechanism for adjusting the position of the seat cushion. Since an appropriate seating posture can be provided to the occupant, for example, the present invention is particularly useful for a seating posture adjusting device that optimizes the occupant's sitting posture.

It is a figure which shows schematic structure of the vehicle interior front part which concerns on embodiment of this invention. It is explanatory drawing which shows a mode that a passenger | crew's seating attitude | position is changed. It is explanatory drawing which shows the position change of the hip point at the time of matching the eyes of a short passenger | crew and a tall passenger | crew to predetermined | prescribed height. 3 is a right side view illustrating a schematic configuration of a sheet according to Embodiment 1. FIG. It is the (a) II sectional view taken on the line in FIG. 4, (b) II-II sectional view taken on the line. It is a figure which shows the locus | trajectory of a passenger | crew's hip point with respect to the front-back direction position of a seat cushion. (A) The relationship between the occupant's hip point forward / backward movement amount and the vertical movement amount, (b) The occupant's hip point forward / backward movement amount and the hip point vertical movement amount minus the thickness of the buttocks. , Respectively. (A) The relationship between the occupant's hip point forward / backward movement amount and weight, (b) The occupant's hip point forward / backward movement amount and the amount of deflection of the cushion part and the elastic member, and (c) the seat forward / backward movement amount It is a graph which shows the relationship with the amount of vertical movement, respectively. It is a graph which shows the relationship between the front-back position of a sheet | seat, and the inclination-angle of a seat surface. It is a right view which shows schematic structure of the sheet | seat which concerns on Embodiment 2. FIG. It is the (a) III-III sectional view taken on the line in FIG. 10, (b) IV-IV sectional view, (c) VV sectional view. It is the VI-VI sectional view taken on the line in FIG. (A) The relationship between the occupant's hip point forward / backward movement amount and the vertical movement amount, (b) The occupant's hip point forward / backward movement amount and the hip point vertical movement amount minus the thickness of the buttocks. , Respectively. (A) Relationship between the occupant's hip point forward / backward movement amount and body weight, (b) Relationship between the occupant's hip point forward / backward movement amount and the deflection amount of the cushion portion, (c) Seat forward / backward movement amount and vertical movement amount It is a graph which shows the relationship with each. It is a right view which shows schematic structure of the sheet | seat which concerns on Embodiment 3. FIG. It is the (a) VII-VII sectional view taken on the line in FIG. 15, (b) VIII-VIII sectional view, (c) Y part expansion perspective view. It is a right view which shows schematic structure of the sheet | seat which concerns on Embodiment 4. FIG. It is the (a) IX-IX sectional view taken on the line in FIG. 17, (b) The XX sectional view. It is a figure which shows the locus | trajectory of a passenger | crew's hip point with respect to the front-back direction position of a seat cushion. FIG. 10 is a right side view illustrating a schematic configuration of a sheet according to a fifth embodiment. It is a figure which shows the locus | trajectory of a passenger | crew's hip point with respect to the front-back direction position of a seat cushion. It is a figure which shows the locus | trajectory of a passenger | crew's hip point with respect to the front-back direction position of the seat cushion which concerns on other embodiment. It is a right view which shows schematic structure of the conventional position adjustment mechanism. It is a graph which shows the relationship between height and leg length.

Explanation of symbols

1 Seat 2 Floor panel 5 Pedal (operating means)
DESCRIPTION OF SYMBOLS 11 Seat cushion 11a Cushion part 15, 16, 17, 18 Support member 20, 30, 40, 50 Position adjustment mechanism 21, 31, 32, 41, 51 Slide part (slide means)
22 Link (lift means)
43 Lift part 55, 61 Guide plate 55a, 61a Guide hole 70 Elastic member (shrinkage characteristic changing means)
80 Correction mechanism A Front movement section B Intermediate movement section C Rear movement section

Claims (8)

An automobile seating posture adjustment device provided with a position adjustment mechanism capable of adjusting a relative position between a seat cushion seat surface on which an occupant is seated and an operation means by which the occupant operates the vehicle,
The contraction characteristic of the seat cushion that bends downward when the occupant is seated, so that the hip point height of the occupant is a predetermined position determined by the relative position in the front-rear direction of the seat cushion seat surface and the operation means. An automobile seating posture adjusting device comprising contraction characteristic changing means for changing in association with the relative position. In claim 1,
The position adjustment mechanism includes slide means for adjusting the front and rear position of the seat cushion,
The vehicle seating posture adjusting device according to claim 1, wherein the contraction characteristic changing means changes the contraction characteristic of the seat cushion in association with the front-rear position of the seat cushion. In claim 1,
The position adjustment mechanism includes lift means for adjusting the front and rear position and the vertical position of the seat cushion,
The seating posture adjusting device for an automobile, wherein the shrinkage characteristic changing means changes the shrinkage characteristic of the seat cushion in association with the position of the seat cushion. In claim 1,
The position adjustment mechanism includes a slide unit that adjusts the front and rear position of the seat cushion, and a lift unit that adjusts the vertical position of the seat cushion in conjunction with the slide unit,
The vehicle seating posture adjusting device according to claim 1, wherein the contraction characteristic changing means changes the contraction characteristic of the seat cushion in association with the front-rear position of the seat cushion. In any one of Claims 1-4,
The vehicle seating posture adjustment device, wherein the contraction characteristic changing means includes a correction mechanism that corrects the amount of deflection of the seat cushion in conjunction with the back-and-forth movement of the seat cushion seat surface by the position adjustment mechanism. In any one of Claims 1-5,
The position adjustment mechanism includes a tilting means for tilting the seating surface in the front-rear direction corresponding to at least one of the front-rear direction and the vertical direction of the seating surface of the seat cushion. Adjustment device. In claim 6,
The contracting characteristic changing means changes the contracting characteristic of the seat cushion in association with an inclination angle in the front-rear direction of the seating surface, and the seating posture adjusting device for an automobile. In any one of Claims 1-7,
When the movable range in the vehicle longitudinal direction of the seat cushion seat surface is divided into a front movement section, an intermediate movement section, and a rear movement section in order from the vehicle front side,
In at least one of the front movement section and the intermediate movement section, the position adjustment mechanism is configured such that the hip point of the occupant on the seat surface descends as the seat surface moves toward the rear of the vehicle, and the rear position is located behind it. In the side movement section, the position of the seating surface is adjusted such that the lowering amount of the hip point relative to the rearward movement amount of the seating surface is smaller than the lowering amount in the one movement section. Car seating posture adjustment device.

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