JP2014100941A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To downsize a vehicle seat in a crosswise direction while inhibiting interference between a pan frame and a height adjustment mechanism.SOLUTION: The vehicle seat includes: a seat cushion frame F1 having left and right side frames 10 and a pan frame 30 connecting the left and right side frames 10 with each other; and height adjustment mechanisms 50, each of which is disposed at the inner side of the side frame 10 in a crosswise direction and adjusts a height of the seat cushion frame F1. The pan frame 30 includes: a bottom wall part 31; and left and right side wall parts 33 which respectively extend upward from left and right ends of the bottom wall part 31. A through hole 33a for inhibiting interference between the height adjustment mechanism 50 and the pan frame 30 is formed at each side wall part 33 so as to face the height adjustment mechanism 50 in the crosswise direction.

Description

  The present invention relates to a vehicle seat including a pan frame and a height adjusting mechanism.

  2. Description of the Related Art Conventionally, a vehicle seat that is formed in a substantially box shape that opens upward and rearward and includes a pan frame that supports a seat cushion pad is known (see Patent Document 1). Further, a vehicle seat that includes a height adjusting mechanism for adjusting the height of the vehicle seat is also known (see Patent Document 2).

JP 2004-306869 A JP 2006-182039 A

  By the way, when providing the height adjustment mechanism in the vehicle seat having the pan frame, it is conceivable to provide the height adjustment mechanism adjacent to the left and right side walls of the substantially box-shaped pan frame. However, in this case, the height adjustment mechanism must be arranged away from the left and right side walls of the pan frame so that the pan frame and the height adjustment mechanism do not interfere with each other, and the vehicle seat becomes large in the left-right direction. There is a problem such as.

  Therefore, an object of the present invention is to reduce the size of a vehicle seat in the left-right direction while suppressing interference between a pan frame and a height adjustment mechanism. Another object of the present invention is to increase the rigidity of the pan frame.

  The present invention that solves the above-described problems is a seat cushion frame having left and right side frames and a pan frame that connects the left and right side frames, and is disposed on the outer side in the left and right direction of the pan frame. A vehicle seat having a height adjusting mechanism for adjusting the left and right side walls, wherein the pan frame includes a bottom wall portion and left and right side wall portions extending upward from left and right ends of the bottom wall portion. A through hole for suppressing interference between the height adjusting mechanism and the pan frame is formed in at least one of the side wall portions so as to face the height adjusting mechanism in the left-right direction.

  According to this configuration, since the through hole that faces the height adjustment mechanism is formed in the side wall portion of the pan frame, the distance between the side walls of the pan frame and the height adjustment mechanism is suppressed, and the distance between them is reduced to reduce the vehicle seat. Can be miniaturized in the left-right direction.

  In the above-described configuration, the height adjusting mechanism includes an upper link, a lower link, a front link, and a rear link that form a four-bar link, and four connection shafts that rotatably connect the links. A front upper connecting shaft that rotatably connects the upper link and the front link among the four connecting shafts protrudes inward in the left-right direction from the upper link and the front link, and the through-hole It can be set as the structure which opposes a front upper connection shaft in the left-right direction.

  According to this, it is possible to suppress interference between the front upper connecting shaft that protrudes inward in the left-right direction with respect to the upper link and the front link and the pan frame.

  Further, in the above-described configuration, a biasing member that biases the front upper connection shaft in a direction in which the height of the seat cushion frame is increased is engaged with the front upper connection shaft, and the front upper connection shaft is It can be set as the structure which protrudes in the left-right direction rather than the said biasing member.

  According to this, it is possible to suppress interference between the front upper connecting shaft that protrudes inward in the left-right direction with respect to the biasing member and the pan frame.

  Moreover, in the above-described configuration, the through hole can be formed in a shape along a movement locus of the front upper connecting shaft with respect to the pan frame.

  According to this, even if the front upper connecting shaft moves with the operation of the height adjusting mechanism, the interference between the front upper connecting shaft and the pan frame can be suppressed. In addition, for example, the size of the through hole can be made the minimum necessary size to avoid interference, compared to a structure in which the through hole has a shape larger than the shape along the movement trajectory of the front upper connecting shaft. , The rigidity of the pan frame can be increased.

  In the above-described configuration, a bent portion extending in the left-right direction and connected to the left and right side wall portions can be formed below the through hole in the bottom wall portion.

  According to this, the rigidity in the vicinity of the through hole of the pan frame can be increased by the bent portion.

  Moreover, in the above-described configuration, the bent portion can be disposed directly below the lowermost end portion of the through hole.

  According to this, the part from the lowest end part of the through hole to the bottom wall part where the length from the lower edge of the through hole to the bottom wall part is the shortest can be reinforced by the bent part.

  In the above-described configuration, a flange extending outward in the left-right direction can be formed at the upper end of the side wall, and a portion of the flange above the through hole can be fixed to the side frame.

  According to this, the rigidity in the vicinity of the through hole of the pan frame can be increased by the fixing portion.

  Moreover, the above-mentioned structure WHEREIN: The convex part which protrudes from the said side wall part can be provided in the said side wall part so that the said through-hole may be adjoined.

  According to this, the rigidity in the vicinity of the through hole of the pan frame can be increased by the convex portion.

  In the above configuration, the convex portion can be formed so as to surround the through hole.

  According to this, the rigidity in the vicinity of the through hole of the pan frame can be further increased by the annular convex portion.

  According to the present invention, since the through-hole facing the height adjusting mechanism is formed in the side wall portion of the pan frame, the distance between the side walls of the pan frame and the height adjusting mechanism is reduced, and the distance between them is reduced to reduce the vehicle seat. Can be miniaturized in the left-right direction.

  Also, according to the present invention, the front upper connecting shaft and the pan frame can be prevented from interfering with each other by causing the through hole to face the front upper connecting shaft protruding inward in the left-right direction from the upper link and the front link. Can be suppressed.

  In addition, according to the present invention, the interference between the front upper connecting shaft and the pan frame is suppressed by causing the through hole to face the front upper connecting shaft that protrudes inward in the left and right directions with respect to the biasing member. Can do.

  Further, according to the present invention, by forming the through hole in a shape along the movement trajectory of the front upper connecting shaft with respect to the pan frame, even if the front upper connecting shaft moves along with the operation of the height adjusting mechanism, Interference between the front upper connecting shaft and the pan frame can be suppressed. In addition, for example, the size of the through hole can be made the minimum necessary size to avoid interference, compared to a structure in which the through hole has a shape larger than the shape along the movement trajectory of the front upper connecting shaft. , The rigidity of the pan frame can be increased.

  Further, according to the present invention, the bending portion extending in the left-right direction and connected to the left and right side wall portions is formed below the through hole in the bottom wall portion, whereby the rigidity in the vicinity of the through hole of the pan frame is increased by the bending portion. Can be high.

  Further, according to the present invention, by arranging the bent portion directly below the bottom end portion of the through hole, the length from the bottom edge of the through hole to the bottom wall portion becomes the shortest from the bottom end portion of the through hole. The part up to the bottom wall can be reinforced with a bent portion.

  Further, according to the present invention, by fixing a portion of the flange formed at the upper end of the side wall portion above the through hole to the side frame, the fixing portion increases rigidity in the vicinity of the through hole of the pan frame. Can do.

  Moreover, according to this invention, the convex part which protrudes from a side wall part is provided so that it may adjoin to a through-hole, and the rigidity of the through-hole vicinity of a pan frame can be made high by a convex part.

  Moreover, according to this invention, the convex part is formed so that a through-hole may be enclosed, and the rigidity of the through-hole vicinity of a pan frame can be made higher by an annular convex part.

1 is a perspective view of a vehicle seat as a vehicle seat according to an embodiment. It is a perspective view which expands and shows a seat cushion frame among seat frames built in a vehicular seat. It is the perspective view which looked at the seat cushion pad from the lower side. It is sectional drawing which shows the structure of the pad side through-hole vicinity of a seat cushion pad. It is the side view which shows a height adjustment mechanism simply, and is the figure (a) which shows the state which raised the front link, and the figure (b) which shows the state which laid down the front link. It is a perspective view which shows the form which provided the bead part in the through-hole vicinity. It is a perspective view which shows the form which formed the bead part in cyclic | annular form.

  Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the following description, first, the overall configuration of a vehicle seat as an example of a vehicle seat will be briefly described, and then the characteristic part of the present invention will be described in detail.

  As shown in FIG. 1, the vehicle seat S is a seat used for a driver's seat of an automobile, and mainly includes a seat cushion S1, a seat back S2, and a headrest S3.

  A seat frame F as shown in FIG. 2 is built in the seat cushion S1 and the seat back S2. The seat frame F is mainly composed of a seat cushion frame F1 constituting a frame of the seat cushion S1 and a seat back frame F2 constituting a frame of the seat back S2. The seat cushion S1 is configured by covering the seat cushion frame F1 with a seat cushion pad 100 (see FIG. 3) made of a cushion material such as urethane foam and a skin material 200 (see FIG. 4) made of synthetic leather or fabric. The seat back S2 is configured by covering the seat back frame F2 with a seat back pad made of a cushion material and a skin material made of synthetic leather or fabric.

  A seating sensor 300 is provided between the seat cushion pad 100 and the skin material 200 described above to detect that an occupant is seated on the seat cushion S1 (see FIG. 4).

  The seat cushion frame F1 is installed on a slider SL supported so as to be movable back and forth with respect to each of a pair of left and right slide rails SR provided on the floor of the automobile. Thereby, the vehicle seat S can adjust the front-rear position.

  The lower portion of the seat back frame F2 is rotatably connected to the rear portion of the seat cushion frame F1 via a reclining mechanism RL. As a result, the seat back S2 can tilt forward and backward with respect to the seat cushion S1.

  In this specification, front and rear, left and right, and top and bottom are based on an occupant seated on the vehicle seat S in a state where the seat back S2 is not tilted by the reclining mechanism RL.

Next, the seat cushion frame F1 and the seat cushion pad 100 will be described in detail.
The seat cushion frame F1 mainly includes a pair of left and right side frames 10, a connecting pipe 20 that connects the rear ends of the side frames 10, and a pan frame 30 that connects the front part of each side frame 10 and the connecting pipe 20. In preparation.

  The left and right side frames 10 are metal frames extending in the front-rear direction, and are spaced apart from each other on the left and right. The front part of the pan frame 30 is fixed to a substantially front half portion of the left and right side frames 10 by a plurality of screws SC, and the connecting pipe 20 is fixed to the rear end part by welding or the like.

  The connecting pipe 20 is a metal cylindrical pipe extending in the left-right direction, and is fixed to a substantially central portion thereof by engaging a rear end portion of the pan frame 30 from above.

  The pan frame 30 is a metal or resin member formed in a substantially box shape opened upward, and is formed to extend from the front end side to the rear end side of the seat cushion pad 100 shown in FIG. In other words, the pan frame 30 is formed to support substantially the entire lower surface of the seat cushion pad 100.

  A seat cushion pad 100 is put on the left and right side frames 10 and the pan frame 30. Thus, the seat cushion pad 100 is supported from below by the side frames 10 and the pan frame 30.

  Specifically, the pan frame 30 mainly includes a bottom wall portion 31, a rear wall portion 32, left and right side wall portions 33 (shown only on the right side), a front wall portion (not shown), and a flange 34. doing.

  The bottom wall portion 31 is formed over substantially the entire lower surface of the seat cushion pad 100, and an elongated hole-like pan frame side through-hole 31 a extending in the front-rear direction penetrates in the vertical direction at a substantially central portion thereof. Is formed. On the other hand, in a substantially central portion of the seat cushion pad 100, a shape matching the pan frame side through hole 31a, that is, a long hole-like pad side through hole 110 that is long in the front-rear direction is formed so as to penetrate vertically. .

  As shown in FIG. 4, in a state where the seat cushion pad 100 is placed on the pan frame 30, the pan frame side through hole 31 a and the pad side through hole 110 are arranged so as to overlap each other when viewed from above and below. . A harness member 310 for the seating sensor 300 is inserted through the two through holes 31a and 110.

  In this way, by passing the harness member 310 for the seating sensor 300 through the two through holes 31a and 110, the harness member 310 can be pulled out from the upper side of the seat cushion pad 100 to the lower side of the pan frame 30. The routing route of 310 can be simplified.

  Further, since the pan frame side through hole 31a is formed as a long hole extending in the front-rear direction, the seat cushion pad 100 moves back and forth while deforming when the occupant sitting on the seat cushion pad 100 moves back and forth. Thus, even if the harness member 310 in the pad side through hole 110 moves back and forth, the harness member 310 can be prevented from interfering with the edge of the pan frame side through hole 31a. Therefore, damage to the harness member 310 can be suppressed.

  Further, since the pad side through hole 110 is formed in a shape that matches the pan frame side through hole 31a, the work (wiring work) of passing the harness member 310 through the two through holes 31a, 110 can be facilitated. It has become.

  As shown in FIG. 2, two attachment holes 31 b for attaching the skin material 200 are formed on the left and right sides of the bread frame side through hole 31 a in the bottom wall portion 31 of the bread frame 30. Each mounting hole 31b is formed in a trapezoidal shape that tapers toward the rear, and is arranged so as to sandwich the rear portion of the pan frame side through hole 31a. In other words, the holes 31a and 31b are arranged so that the center of each mounting hole 31b and the center of the pan frame side through hole 31a are displaced in the front-rear direction.

  Around each mounting hole 31b, a trapezoidal annular bead 31c along each mounting hole 31b is formed so as to protrude upward from the bottom wall portion 31, respectively. A part of the annular bead 31c (a front portion in the left-right direction) is disposed between the pan frame side through hole 31a and the mounting hole 31b, more specifically, adjacent to the pan frame side through hole 31a and the mounting hole 31b. Has been. Thereby, it is possible to increase both the rigidity of the pan frame 30 in the vicinity of the pan frame side through hole 31a and the vicinity of the mounting hole 31b by the single annular bead 31c.

  Further, the annular bead 31c is formed in a trapezoidal shape so that a portion on the inner side in the left-right direction is inclined inward in the left-right direction as it goes forward. That is, since the portion on the inner side in the left-right direction of the annular bead 31c is formed so as to approach the pan frame side through hole 31a toward the front, the pan bead side through hole 31a is effectively reinforced by the annular bead 31c. It is possible.

  In addition, a bent portion 31d having an L shape in cross section that is bent downward from the bottom wall portion 31 is formed on the front side of the pan frame side through hole 31a so as to extend in the left-right direction and to be connected to the left and right side wall portions 33. Yes. Thereby, also by the bending part 31d, it is possible to raise the rigidity of the pan-frame side through-hole 31a vicinity.

  The rear wall portion 32 is formed so as to extend rearward and obliquely upward from the rear end of the bottom wall portion 31, and the upper end portion thereof is formed in a hook shape bent along the peripheral surface of the connection pipe 20. The connecting pipe 20 is engaged.

  The side wall part 33 is formed so as to extend obliquely from the left and right ends of the bottom wall part 31 upward and outward in the left-right direction. A height adjustment mechanism 50 for adjusting the height of the seat cushion frame F <b> 1 is provided between the side wall portion 33 and the side frame 10.

  As shown in FIGS. 5 (a) and 5 (b), the height adjusting mechanism 50 is provided inside the left and right side frames 10 and mainly includes a front link 51, a rear link 52, and an upper link. 53, a slider SL as an example of a lower link, and a spiral spring 54 as an example of a biasing member. The front link 51 and the rear link 52 are each formed in a V shape, and the lower ends thereof are rotatably connected to the front and rear end portions of the slider SL via the front lower connection shaft 55A and the rear lower connection shaft 55B. At the same time, the center portion (portion corresponding to the valley of V) is rotatably connected to the side frame 10 via the center side connecting shaft 55C.

  As a result, the side frame 10, the lower half of the front link 51 and the rear link 52, and the slider SL form a four-bar link. Therefore, when the front link 51 and the rear link 52 are tilted back and forth, The frame 10 moves up and down.

  The upper ends of the front link 51 and the rear link 52 are rotatably connected to the upper link 53 via a front upper connection shaft 55D and a rear upper connection shaft 55E, respectively. As a result, the front link 51, the rear link 52, the upper link 53, and the slider SL constitute a four-bar link. Therefore, when the front link 51 and the rear link 52 are tilted back and forth, the upper link 53 Moves up and down together with the side frame 10.

  The spiral spring 54 is a spring that biases in the direction in which the front link 51 is raised (the direction in which the height of the seat cushion frame F1 is increased), and is disposed on the inner side in the left-right direction with respect to the front link 51 and the upper link 53. The end portion on the side is engaged with the spring engaging portion 14 formed on the side frame 10, and the outer end portion thereof is engaged with the front upper connecting shaft 55D. The front link 51 is configured to tilt forward and backward when power from an operation lever (not shown) is transmitted.

  In the height adjustment mechanism 50 configured as described above, when the side frame 10 is lowered, the occupant operates the operation lever in one direction so as to tilt the front link 51 backward against the urging force of the spiral spring 54. By tilting to the side frame 10, the side frame 10 is lowered. When the side frame 10 is raised, the side frame 10 is raised by tilting the occupant to operate the operation lever in the other direction and raise the front link 51 forward. At this time, the urging force of the spiral spring 54 acts to assist the operation of the occupant operating the operation lever in the other direction.

  The front upper connecting shaft 55D described above is formed so as to protrude inward in the left-right direction with respect to the spiral spring 54. That is, the end portion on the inner side in the left-right direction of the front upper coupling shaft 55 </ b> D is a portion that is disposed on the innermost side in the left-right direction among the respective portions of the height adjustment mechanism 50.

  As shown in FIGS. 2 and 5, the side wall 33 of the pan frame 30 is formed with a through-hole 33a that faces the front upper coupling shaft 55D in the left-right direction. The through hole 33a is an escape portion for suppressing the interference between the front upper connection shaft 55D and the side wall portion 33 of the pan frame 30, and is formed in a shape along the movement locus of the front upper connection shaft 55D with respect to the pan frame 30. Yes.

  That is, the through-hole 33a is formed in an arc shape centered on the front center side connecting shaft 55C. Accordingly, it is possible to suppress interference between the front upper coupling shaft 55D and the side wall portion 33 regardless of the state of the height adjustment mechanism 50 (see FIGS. 5A and 5B). . By providing such a through hole 33a, the distance between the side wall portion 33 and the height adjusting mechanism 50 can be reduced as compared with, for example, a structure in which no through hole is provided. It is possible to do.

  Further, by forming the through hole 33a in a shape along the movement trajectory of the front upper connecting shaft 55D, for example, the through hole is formed in a shape larger than the shape along the movement trajectory of the front upper connecting shaft. Since the size of the hole 33a can be made the minimum necessary size to avoid interference, the rigidity of the pan frame 30 can be increased.

  Further, the through hole 33a is formed so that the front end thereof is positioned below the rear end, and the bottom wall described above is located directly below the lowest end A1 of the front end. A bent portion 31d of the portion 31 is disposed. As a result, it is possible to reinforce the portion from the lowermost end A1 to the bottom wall portion 31 of the through hole 33a where the length from the lower edge of the through hole 33a to the bottom wall portion 31 is the shortest by the bent portion 31d. It has become.

  Moreover, the through-hole 33a is formed so that the ridgeline of the bending part 33b bent in the substantially V shape so that it may become convex in the left-right direction among the side wall parts 33 is formed. Thereby, also by the bending part 33b, the rigidity of the site | part of the through-hole 33a vicinity can be improved.

  The flange 34 is formed to extend outward from the upper edge of the front wall portion (not shown) extending obliquely upward and forward from the front end of the bottom wall portion 31 and from the upper edge of the left and right side wall portions 33. A portion 34a of the flange 34 above the through hole 33a is fastened to the side frame 10 by screws SC. Thereby, it is possible to increase the rigidity in the vicinity of the through hole 33a of the pan frame 30 also by the fastening portion by the screw SC.

  Although the embodiments of the present invention have been described above, the present invention can be implemented with appropriate modifications as shown in other embodiments below. In the following description, components that are substantially the same as those of the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the embodiment, the reinforcement in the vicinity of the through hole 33a is performed by the bent portion 31d, the bent portion 33b, and the fastening portion by the screw SC, but the present invention is not limited to this. For example, as shown in FIG. 6, a bead portion 33c as an example of a convex portion protruding from the side wall portion 33 may be provided along the lower edge of the through hole 33a so as to be adjacent to the through hole 33a. According to this, the rigidity in the vicinity of the through hole 33a of the pan frame 30 can be increased by the bead portion 33c.

  Further, as shown in FIG. 7, the bead portion 33d may be formed along the through hole 33a so as to surround the through hole 33a. According to this, the rigidity in the vicinity of the through hole 33a of the pan frame 30 can be further increased by the annular bead portion 33d.

  In addition, as a convex part, it is not restricted to bead part 33c, 33d mentioned above, For example, when a pan frame is resin, it may be a solid-shaped protrusion.

  In the embodiment, the through holes 33a are provided in both the left and right side wall portions 33. However, the present invention is not limited to this, and the through holes may be formed in at least one of the side wall portions. Even when the through hole is provided only on one side wall portion, the vehicle seat can be downsized in the left-right direction as compared with, for example, a structure in which the through hole is not provided on both the left and right side wall portions. .

  In the above-described embodiment, the bent portion 31d is arranged directly below the lowermost end A1 of the through hole 33a. However, the present invention is not limited to this, and the bent portion may be arranged in any manner as long as it is below the through hole. Good.

  In the said embodiment, although the through-hole 33a was made into the circular-arc long hole, this invention is not limited to this, For example, a circular shape and a polygonal hole may be sufficient.

  In the above embodiment, the spiral spring 54 is exemplified as the biasing member, but the present invention is not limited to this, and may be, for example, a torsion spring or a coil spring.

  In the said embodiment, although the flange 34 and the side frame 10 were fixed by fastening with the screw | thread SC, this invention is not limited to this, For example, you may fix by welding etc.

  In the said embodiment, although the vehicle seat S used by a motor vehicle was illustrated as a vehicle seat, this invention is not limited to this, For example, the sheet | seat used for a ship, an aircraft, etc. It can also be applied to.

DESCRIPTION OF SYMBOLS 10 Side frame 30 Pan frame 31 Bottom wall part 33 Side wall part 33a Through-hole 50 Height adjustment mechanism F1 Seat cushion frame S Vehicle seat

Claims (9)

A seat cushion frame having left and right side frames and a pan frame connecting the left and right side frames; and a height adjusting mechanism arranged on the outer side in the left and right direction of the pan frame for adjusting the height of the seat cushion frame. A vehicle seat comprising:
The pan frame has a bottom wall portion and left and right side wall portions extending upward from left and right ends of the bottom wall portion,
A through hole for suppressing interference between the height adjusting mechanism and the pan frame is formed in at least one of the left and right side wall parts so as to face the height adjusting mechanism in the left-right direction. A vehicle seat characterized by that. The height adjustment mechanism is
An upper link, a lower link, a front link and a rear link constituting a four-bar link;
Four connecting shafts that connect the links in a rotatable manner;
Of the four connecting shafts, a front upper connecting shaft that rotatably connects the upper link and the front link protrudes inward in the left-right direction from the upper link and the front link,
The vehicle seat according to claim 1, wherein the through hole is opposed to the front upper connection shaft in a left-right direction. A biasing member that biases the front upper connection shaft in a direction in which the height of the seat cushion frame is increased engages with the front upper connection shaft,
The vehicle seat according to claim 2, wherein the front upper connecting shaft protrudes inward in the left-right direction with respect to the biasing member.   The vehicle seat according to claim 2 or 3, wherein the through hole is formed in a shape along a movement locus of the front upper connecting shaft with respect to the pan frame.   The bent part which extends in the left-right direction and is connected with the said left-right side wall part is formed under the said through-hole among the said bottom wall parts, The any one of Claims 1-4 characterized by the above-mentioned. Vehicle seat described in 1.   The vehicle seat according to claim 5, wherein the bent portion is disposed directly below a lowermost end portion of the through hole. A flange extending outward in the left-right direction is formed at the upper end of the side wall portion,
The vehicle seat according to any one of claims 1 to 6, wherein a portion of the flange above the through hole is fixed to the side frame.   8. The vehicle according to claim 1, wherein a convex portion protruding from the side wall portion is provided on the side wall portion so as to be adjacent to the through hole. Sheet.   The vehicle seat according to claim 8, wherein the convex portion is formed so as to surround the through hole.

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