JP2018016258A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat which enables a link to stably operate.SOLUTION: A vehicle seat includes: a seat cushion; a slide rail 30 supported by a vehicle body of a vehicle; and a height adjustment mechanism 100 which moves up or down the seat cushion relative to the slide rail 30. The height adjustment mechanism 100 includes: a rear link 130 which is rotatably connected with the seat cushion and the slide rail 30; a rod 150 which moves in an axial direction to rotate the rear link 130 and moves up or down the seat cushion relative to the slide rail 30; and a support link 170 which is disposed so as to be arranged side by side with the rear link 130 in a rotation axial direction of the rear link 130 and is connected with the seat cushion coaxially with the rear link 130 in a rotatable manner. A rear end part 151 of the rod 150 is disposed between the rear link 130 and the support link 170 and is rotatably connected with the rear link 130 and the support link 170.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle seat provided with a height adjusting mechanism for raising and lowering a seat cushion.

  Conventionally, as a height adjustment mechanism for raising and lowering the seat cushion, a screw member that is movable in the axial direction is provided, and the side frame of the seat cushion is moved up and down with respect to the upper rail by moving the screw member in the axial direction. What was comprised is known (patent document 1). Specifically, this technology includes a pipe rotatably locked to the upper rail, and a second link plate joined to one end of the pipe, and one end of the screw member rotates to one end of the second link plate. Connected as possible. Then, when the screw member moves back and forth, the second link plate rotates back and forth to rotate the pipe, and the first link plate joined to the pipe by the pipe rotation rotates up and down. Then, the side frame is configured to move up and down.

Japanese Patent Laid-Open No. 11-059244 (FIG. 1)

  By the way, since a large load applied to the seat cushion is applied to the link, it is desired that the link can operate stably.

Accordingly, an object of the present invention is to provide a vehicle seat in which a link can operate stably.
Another object of the present invention is to effectively use the space in the sheet.
Another object of the present invention is to improve the rigidity of the link.
Another object of the present invention is to improve the attachment rigidity of the link.
Moreover, an object of this invention is to suppress the interference of a member.
Another object of the present invention is to improve the rigidity of an actuator that drives a rod.

  In order to achieve the above-described object, a vehicle seat according to the present invention includes a seat cushion, a seat support member supported by a vehicle body, and a height adjustment mechanism that raises and lowers the seat cushion with respect to the seat support member. The height adjustment mechanism includes a first link pivotally connected to the seat cushion and the seat support member, and the first link by moving in an axial direction. A rod that moves the seat cushion up and down relative to the seat support member, and is arranged so as to be aligned with the first link in the rotational axis direction of the first link, and the seat cushion or the seat support member And a second link rotatably connected coaxially with the first link, and one end of the rod is connected to the first link and the second link. Disposed, characterized in that it is rotatably connected to the first link and the second link.

  According to such a structure, since the one end part of a rod can be supported from the both sides of a rotation axis direction by the 1st link and the 2nd link, a link can operate | move stably, without twisting.

  In the vehicle seat described above, the first link includes a first connecting portion connected to the seat cushion and a second connecting portion connected to the rod, and the second connecting portion It can be set as the structure arrange | positioned in the position shifted | deviated to the said 2nd link side with respect to the said 1st connection part in the moving-axis direction.

  According to this, since a space can be secured on the side opposite to the second link side of the second connecting portion, the first link can be disposed closer to the adjacent member by the amount of the space. Thereby, the space in a sheet | seat can be utilized effectively.

  In the vehicle seat described above, the first link has a bulging portion that bulges toward the second link side in the rotation axis direction, and the second connecting portion is formed in the bulging portion. It can be set as the structure currently made.

  According to this, the rigidity of the first link can be improved by the bulging portion.

  In the vehicle seat described above, the seat cushion includes left and right side frames constituting left and right frames, and a connection pipe connecting the left and right side frames, and the connection pipe is directed toward the inside of the connection pipe. The second link is fixed to a portion of the connecting pipe in which the recess is formed in the rotation axis direction. It can be configured.

  According to this, the mounting rigidity of the second link can be improved.

  In the vehicle seat described above, the seat cushion connects the left and right side frames constituting the left and right frames, the front frame connecting the front portions of the left and right side frames, and the rear portions of the left and right side frames. A rear frame, and an occupant support member that is bridged between the front frame and the rear frame, and the second link has one of the left and right side frames in the rotational axis direction, It can be set as the structure arrange | positioned between the said passenger | crew support members.

  According to this, the space in the sheet can be used effectively. Further, interference between the occupant support member and the second link can be suppressed.

  In the vehicle seat described above, the height adjusting mechanism includes an actuator for reciprocating the rod in the axial direction, and the vehicle seat further includes a bracket for attaching the actuator to the seat support member. The bracket is fixed to the seat support member, and the second bracket is fixed to the first bracket and holds the actuator so as to be rotatable about an axis parallel to the rotation axis direction. The first bracket may have a bead portion protruding upward, and the second bracket may be fixed to the bead portion.

  According to this, the rigidity of the first bracket is improved by the bead portion, and the mounting rigidity of the second bracket can be improved by fixing the second bracket to the portion having the high rigidity. Thereby, the mounting rigidity of the actuator can be improved.

  In the vehicle seat described above, the second bracket includes a first wall fixed to the bead portion, and a pair of second walls that rise from both left and right ends of the first wall and hold the actuator rotatably. The second link may be arranged at a position between the pair of second walls in the rotation axis direction.

  According to this, since the 2nd link can be arranged compactly in the direction of a rotation axis, the space in a sheet can be used effectively.

  In the vehicle seat described above, the actuator includes a motor, a gear box that houses a gear for transmitting the driving force of the motor to the rod, the motor and the gear box, and the second bracket. It can be set as the structure which has the housing attached so that rotation is possible.

  In the vehicle seat described above, the seat support member includes a lower rail that is fixed to a vehicle body of the vehicle, and an upper rail that is slidably engaged with the lower rail, and the first link is attached to the upper rail. It can be set as the structure connected so that rotation is possible.

  According to the present invention, the link can operate stably.

  Moreover, according to this invention, the space in a sheet | seat can be utilized effectively by arrange | positioning the 2nd connection part of a 1st link in the position which shifted | deviated to the 2nd link side with respect to the 1st connection part.

  Moreover, according to this invention, the rigidity of a 1st link can be improved with a bulging part by forming a 2nd connection part in a bulging part.

  Moreover, according to this invention, the attachment rigidity of a 2nd link can be improved by fixing a 2nd link to the part in which the recessed part of the connection pipe was formed.

  According to the present invention, the space in the seat can be used effectively by arranging the second link between the side frame and the occupant support member. Further, interference between the occupant support member and the second link can be suppressed.

  Further, according to the present invention, the mounting rigidity of the actuator can be improved by fixing the second bracket to the bead portion of the first bracket.

  Moreover, according to this invention, the space in a sheet | seat can be utilized effectively by arrange | positioning a 2nd link in the position between a pair of 2nd walls of a 2nd bracket.

It is a perspective view of a vehicle seat as a vehicle seat according to an embodiment. It is a perspective view of a seat cushion frame and a slide rail. It is the figure which looked at the seat cushion frame from the top. It is a disassembled perspective view of a height adjustment mechanism. It is the perspective view which looked at the left rear link from the left-right direction inner side. It is a perspective view of the left rear link and support link periphery. It is the figure which looked at the circumference of a rod from the top. It is a perspective view of the periphery of a first actuator and a bracket. It is the figure which looked at the 2nd bracket and the support link from the front. It is the figure which looked at the height adjustment mechanism from the left-right direction inner side. It is the figure which looked at the height adjustment mechanism from the left-right direction inner side, and is the figure (a) which has a seat cushion frame in the uppermost position, and the figure (b) in which a seat cushion frame is in the lowest position. It is a disassembled perspective view of a tilt mechanism. It is a perspective view of a side frame, a rotation frame, a push-up link, and a pinion gear. It is the figure which looked at the left side frame, front link, rotation frame, and push-up link from the front. It is the perspective view which looked at the 1st actuator periphery from the horizontal direction inner side. It is the figure which looked at the tilt mechanism from the left-right direction inner side. It is a figure which shows the state which pushed up the rotation frame.

Hereinafter, an embodiment of the invention will be described with reference to the accompanying drawings. In this specification, front and rear, left and right, and top and bottom are based on front and rear, left and right, and top and bottom viewed from a person sitting on a vehicle seat.
As shown in FIG. 1, the vehicle seat of this embodiment is comprised as the vehicle seat S mounted in a motor vehicle, and is provided with the seat cushion S1 and the seat back S2.

  A seat cushion frame F1 as shown in FIG. 2 is built in the seat cushion S1. The seat cushion frame F1 is a member constituting the skeleton of the seat cushion S1. The seat cushion S1 is configured by covering the seat cushion frame F1 with a pad material made of urethane foam or the like and a skin material made of fabric or leather.

The seat cushion frame F1 includes left and right side frames 11, 11, a front connection pipe 12 as a front frame, a rear connection pipe 13 as a rear frame and a connection pipe, and a pan frame 14.
The left and right side frames 11, 11 are members constituting the left and right frames of the seat cushion S1, and are arranged in a state of being spaced apart from each other by a predetermined interval. Each side frame 11 is formed by sheet metal processing a metal plate, and has a cross-sectional shape with an upper end and a lower end extending inward in the left-right direction.

  The front connection pipe 12 is a member that connects the front portions of the left and right side frames 11, 11, and the rear connection pipe 13 is a member that connects the rear portions of the left and right side frames 11, 11. The front connection pipe 12 and the rear connection pipe 13 are made of a metal pipe material. In the present embodiment, the front connection pipe 12 and the rear connection pipe 13 are connected to the left and right side frames 11 and 11 so as to be rotatable.

As shown in FIG. 3, an occupant support member 15 is placed between the front connection pipe 12 and the rear connection pipe 13 in a state where it is bridged. The occupant support member 15 is not shown in FIG.
The occupant support member 15 is a member that supports the occupant sitting on the seat cushion S1 from below, and includes a seat spring 15A and a connecting member 15B.

  The seat spring 15A is a spring that is bent zigzag so as to meander a metal wire left and right, and is provided in a state where three are arranged side by side. The connecting member 15B is a resin member that connects the three seat springs 15A, and is integrally formed with the three seat springs 15A by insert molding. The occupant support member 15 is such that the front end of each seat spring 15A is hooked to the front connection pipe 12, and the rear end of each seat spring 15A covered by the connection member 15B is hooked to the rear connection pipe 13. It is installed between the front connection pipe 12 and the rear connection pipe 13.

  The pan frame 14 is a member that supports the thigh of an occupant sitting on the seat cushion S1 from below, and is arranged so as to span the front end portions of the left and right side frames 11, 11. The pan frame 14 is formed by sheet metal processing a metal plate.

  Returning to FIG. 2, the vehicle seat S further includes slide rails 30 and 30 as seat support members, a height adjustment mechanism 100, and a tilt mechanism 200.

The slide rails 30, 30 are mechanisms for adjusting the front / rear position of the seat cushion S1 by sliding the seat cushion S1 back and forth, and are arranged in a state of being spaced apart from each other with a predetermined interval. Each slide rail 30 is supported by a vehicle body as a vehicle body of the vehicle, and includes a lower rail 31 and an upper rail 32.
The lower rail 31 is formed by subjecting a metal plate to sheet metal processing, and has a shape extending long in the front-rear direction. The lower rail 31 is fixed to the floor of the vehicle body.

  The upper rail 32 is formed by subjecting a metal plate to sheet metal processing, and has a shape extending long in the front-rear direction. The upper rail 32 is engaged with the lower rail 31 so as to be slidable back and forth. Since the upper rail 32 is connected to the seat cushion frame F <b> 1 via links 110, 120, 130, and 140, which will be described later, the upper cushion 32 slides back and forth with respect to the lower rail 31, so that the seat cushion S <b> 1 is moved. Slide back and forth with respect to the car body. On the upper surface of the upper rail 32, a link connecting portion 32A for connecting the links 110, 120 is provided at the front end portion, and a link connecting portion 32B for connecting the links 130, 140 is provided at the rear portion. .

  The height adjustment mechanism 100 is a mechanism for adjusting the height position of the seat cushion S1 by moving the seat cushion S1 up and down with respect to the slide rail 30. As shown in FIG. 4, the height adjustment mechanism 100 includes a left front link 110, a right front link 120, a left rear link 130 as a first link, a right rear link 140, and a rod 150. A second actuator 160 as an actuator and a support link 170 as a second link are provided.

  The front link 110 and the rear link 130 are rotatably connected to the left side frame 11 and the slide rail 30, thereby forming a four-bar linkage mechanism together with the left side frame 11 and the slide rail 30. Similarly, the front link 120 and the rear link 140 are pivotally connected to the right side frame 11 and the slide rail 30 that constitute the seat cushion S1, so that the front link 120 and the rear link 140 are 4 together with the right side frame 11 and the slide rail 30. The knot link mechanism is configured.

  Specifically, as shown in FIG. 2, the front links 110 and 120 have upper ends arranged on the outer sides in the left-right direction of the side frame 11, and can be rotated around the center in the front-rear direction of the side frame 11 by the pins 191. It is connected. The lower ends of the front links 110 and 120 are disposed on the inner side in the left-right direction of the link connecting portion 32A provided on the upper rail 32, and are rotatably connected to the link connecting portion 32A by pins 192.

  In addition, the rear links 130 and 140 are arranged at the inner side in the left-right direction of the side frame 11 and connected to the left and right ends of the rear connection pipe 13 by welding, so that the rear links 130 and 140 are connected to the rear part of the side frame 11. The rear connection pipe 13 and the rear connection pipe 13 are connected so as to be rotatable. The lower ends of the rear links 130 and 140 are disposed on the inner side in the left-right direction of the link connecting portion 32B provided on the upper rail 32, and are rotatably connected to the link connecting portion 32B by pins 194.

As shown in FIG. 5, the left rear link 130 includes a first connecting part 131, a second connecting part 132, and a connecting part 133 that connects the first connecting part 131 and the second connecting part 132. Yes.
The first connecting portion 131 is a portion connected to the left side frame 11 and the slide rail 30, and includes a pipe insertion hole 131 </ b> A through which the rear connection pipe 13 is inserted and a pin insertion hole 131 </ b> B through which the pin 194 is inserted. Have.

  The second connecting portion 132 is a portion connected to the rod 150, and is in a range extending from the lower portion of the rear link 130, specifically, the lower portion of the pin insertion hole 131B to the front oblique lower portion of the pipe insertion hole 131A. Is formed. The second connecting portion 132 is disposed at a position shifted to the right side (support link 170 side) with respect to the first connecting portion 131 in the left-right direction corresponding to the rotation axis direction of the rear link 130. A pin insertion hole 132 </ b> A through which the pin 195 (see FIG. 4) is inserted is formed at the lower end of the second connecting portion 132. Further, the rear link 130 has a second connecting portion 132 and a connecting portion 133 that connects the second connecting portion 132 and the first connecting portion 131 toward the right side with respect to the first connecting portion 131 in the left-right direction. A bulging portion 134 that bulges out is formed. For this reason, it can also be said that the second connecting portion 132 is formed in the bulging portion 134.

  Note that a recess 135 formed on the back side of the bulging portion 134 has a part of the left upper rail 32 when the height position of the seat cushion S1 is lowered to some extent by the height adjustment by the height adjustment mechanism 100. (See FIG. 11B). That is, the concave portion 135 on the back side of the bulging portion 134 serves as an escape portion for avoiding interference with other members. As a result, the rear link 130 can be disposed close to the slide rail 30, so that the space in the vehicle seat S can be used effectively.

  As shown in FIG. 6, the support link 170 is arranged so as to be aligned with the rear link 130 in the left-right direction. Specifically, the support link 170 is disposed adjacent to the inner side of the rear link 130 in the left-right direction. As shown in FIG. 3, the support link 170 is disposed between one of the left and right side frames 11, 11, specifically, the left side frame 11 and the occupant support member 15 in the left-right direction. ing. More specifically, the support link 170 is disposed in a space formed between the left side frame 11 and the occupant support member 15 in the left-right direction.

  Returning to FIG. 6, the upper end portion of the support link 170 is connected to the left end portion of the rear connection pipe 13 by welding, so that the rear connection pipe 13 and the rear links 130 and 140 (FIG. 2) are connected to the rear portion of the side frame 11. (See FIG. 1) and are pivotally coupled together. In other words, the upper end portion of the support link 170 is connected to the rear portion of the side frame 11 so as to be rotatable coaxially with the rear links 130 and 140. In further detail, the left end of the rear connection pipe 13 is formed with a left and right recess 13A that is recessed toward the inside of the rear connection pipe 13, and the upper end of the support link 170 is formed in the left-right direction. In FIG. 2, the rear connection pipe 13 is fixed by welding at a position overlapping the portion where the recess 13A is formed.

  As shown in FIG. 7, the rod 150 slides back and forth in the axial direction, specifically, substantially back and forth, thereby rotating the rear link 130, thereby driving the height adjustment mechanism 100 to drive the seat cushion S1. Is a member that raises and lowers the slide rail 30. The rod 150 is formed in a rod shape extending substantially front and rear, and a thread groove 153 is formed on the outer peripheral surface of the front end portion 152. As shown in FIG. 6, the rear end portion 151 which is one end portion of the rod 150 is disposed between the lower end portion of the rear link 130 (second connecting portion 132) and the lower end portion of the support link 170. The rear end portion 151 of the rod 150 is pivotally connected to the rear link 130 and the support link 170 by a pin 195 while being sandwiched between the lower end portion of the rear link 130 and the lower end portion of the support link 170. Yes. A collar 180 for adjusting a distance between the rear end portion 151 and the rear link 130 is disposed between the rear end portion 151 of the rod 150 and the rear link 130.

As shown in FIG. 4, the second actuator 160 is a mechanism for driving the height adjustment mechanism 100 by reciprocating the rod 150 substantially back and forth, and includes a motor 161 that can rotate forward and backward, a gear box 162, and the like. And a housing 163.
The motor 161 is fixed to the gear box 162.

  The gear box 162 is a member that accommodates a plurality of gears (not shown) for decelerating and transmitting the rotational driving force of the motor 161 to the rod 150, and the front end 152 that is the other end of the rod 150 is inserted through the gear box 162. There is no rod insertion hole. The gear housed in the gear box 162 includes an input gear that receives rotational driving force from the shaft of the motor 161, and an output gear that meshes with the thread groove 153 (see FIG. 7) of the rod 150 inserted through the gear box 162. And a transmission gear that decelerates the rotational driving force input to the input gear and transmits it to the output gear. With such a configuration, when the shaft of the motor 161 is rotationally driven in the first direction, the rod 150 slides substantially backward while rotating. When the shaft of the motor 161 is rotationally driven in the second direction opposite to the first direction, the rod 150 slides substantially forward while rotating.

  The housing 163 is a member that holds the motor 161 and the gear box 162, and is formed by processing a metal plate into a sheet metal. The housing 163 includes a base portion 163A, a pair of front and rear holding portions 163B and 163C extending upward from both front and rear ends of the base portion 163A, and a pair of left and right mountings extending rearward from the left and right ends of the rear holding portion 163C. Parts 163D and 163E (see FIG. 7). The gear box 162 to which the motor 161 is fixed is disposed between the pair of holding portions 163B and 163C, and is fixed to the pair of holding portions 163B and 163C by screws 182 (see FIG. 8). Thereby, the housing 163 holds the motor 161 and the gear box 162. The pair of holding portions 163B and 163C are formed with rod insertion holes 163H that communicate with the rod insertion holes of the gear box 162 and through which the front end portion 152 of the rod 150 is inserted. Moreover, a pair of attaching part 163D, 163E is a part attached to the 2nd bracket 320 mentioned later so that rotation is possible.

The second actuator 160 is attached to the left slide rail 30 by a metal bracket 300.
The bracket 300 is a member for attaching the second actuator 160 to the slide rail 30, and includes a first bracket 310 and a second bracket 320.

  The first bracket 310 is a member that is fixed to the slide rail 30, and includes a first fixing portion 311, an extending portion 312 that extends substantially downward from an end on the inner side in the left-right direction of the first fixing portion 311, and an extension And a second fixing portion 313 extending inward in the left-right direction from the lower end of the portion 312. In addition, the first bracket 310 is formed with a bead portion 314 that protrudes substantially upward near the center in the front-rear direction. The bead portion 314 extends over the first fixing portion 311, the extending portion 312 and the second fixing portion 313, and the upper surface thereof is a substantially flat surface. As shown in FIG. 8, the first bracket 310 is fixed to the slide rail 30 by fixing the first fixing portion 311 to the upper surface of the upper rail 32 by fastening bolts 181 and 181.

  Returning to FIG. 4, the second bracket 320 is a member fixed to the first bracket 310, and includes a first wall 321 and a pair of left and right second walls 322 and 322 rising from both left and right ends of the first wall 321. It has a substantially U-shaped cross section. As shown in FIG. 8, the second bracket 320 has a pair of second walls 322 and 322 disposed between a pair of mounting portions 163D and 163E formed on the housing 163, and a pair of mounting portions by pins 196 and 196. 163D and 163E are rotatably connected. As a result, the pair of second walls 322 and 322 of the second bracket 320 hold the second actuator 160 so that the second actuator 160 can be pivoted substantially up and down around the pins 196 and 196 as axes parallel to the horizontal direction. . As shown in FIG. 9, the second bracket 320 has the first wall 321 fixed to the upper surface of the bead portion 314 by fastening a bolt and a nut (not shown) in the second fixing portion 313 of the first bracket 310. The first bracket 310 is fixed. The support link 170 is disposed at a position between the pair of second walls 322 and 322 in the left-right direction.

Here, the operation of the height adjustment mechanism 100 will be described.
When the motor 161 of the second actuator 160 is rotationally driven in the first direction from the state shown in FIG. 10 and the rod 150 slides substantially rearward, the lower end of the left rear link 130 via the pin 195 is moved by the rod 150. When the part is pushed rearward, the rear link 130 rotates around the pin 194 in the clockwise direction in the figure. Thereby, as shown to Fig.11 (a), the rear link 130 stands up ahead. At this time, since the left and right rear links 130 and 140 are connected by the rear connection pipe 13, the right rear link 140 also rotates together with the rear link 130 and rises forward. Then, when the rear links 130 and 140 rise to the front, the front links 110 and 120 also turn and rise to the front, thereby raising the side frame 11 (seat cushion frame F1) with respect to the slide rail 30. Can do. As a result, the height position of the seat cushion S1 can be increased.

  On the other hand, from the state shown in FIG. 10, when the motor 161 of the second actuator 160 is rotationally driven in the second direction opposite to the first direction and the rod 150 slides substantially forward, the pin 195 is moved by the rod 150. When the lower end of the left rear link 130 is pulled forward, the rear link 130 rotates about the pin 194 counterclockwise in the figure. Thereby, as shown in FIG.11 (b), the rear link 130 falls backward. At this time, the right rear link 140 also falls backward while rotating together with the rear link 130. When the rear links 130 and 140 are tilted rearward, the front links 110 and 120 are also rotated and tilted rearward, whereby the side frame 11 (seat cushion frame F1) is lowered with respect to the slide rail 30. Can do. As a result, the height position of the seat cushion S1 can be lowered. At this time, a part of the left upper rail 32 enters the recess 135 on the back side of the bulging portion 134 of the rear link 130, thereby suppressing interference between the upper rail 32 and the rear link 130.

  As shown in FIG. 12, the tilt mechanism 200 is a mechanism for adjusting the angle of the seating surface of the seat cushion S1 with respect to the horizontal plane by moving the front portion of the seat cushion S1 up and down. The tilt mechanism 200 includes a left rotation frame 210, a right rotation frame 220 as a rotation member, a left push-up link 230 (see FIG. 13), a right push-up link 240 as a push-up member, and a drive. A pinion gear 250 as a member and a first actuator 260 are provided. In the present embodiment, since the rotating frames 210 and 220 are formed substantially symmetrically, the configuration of the right rotating frame 220 will be described in detail below, and the left rotating frame 210 will be described. The same reference numerals are given and the description is omitted.

As shown in FIG. 13, the rotating frame 220 includes a frame main body 21 formed by processing a metal plate into a sheet metal, and a pin 22 forming a sliding contact portion 22A.
The frame body 21 includes a side portion 23 and a frame fixing portion 24 that extends inward in the left-right direction from the upper end of the side portion 23. The side portion 23 is formed with a pin insertion hole 23A through which the tip of the pin 22 is inserted. The pin 22 is inserted into the pin insertion hole 23A from the inner side in the left-right direction of the side frame 11 through the through hole 242 formed in the push-up link 240 and the through hole 11A formed in the side frame 11. In the state, it is fixed to the side portion 23 by welding or the like. The through hole 11 </ b> A of the side frame 11 is formed in an arc shape extending in the rotation direction around the pin 291 of the rotation frame 220. The through hole 11 </ b> A is formed to be symmetric with respect to the left and right side frames 11, 11.

  As shown in FIG. 14, the slidable contact portion 22 </ b> A is a shaft portion of the pin 22, and is provided so as to extend inward in the left-right direction of the side frame 11 through the through hole 11 </ b> A of the side frame 11. An end on the outer side in the left-right direction of the sliding contact portion 22 </ b> A, that is, a front end surface 22 </ b> B of the pin 22 is disposed on the inner side in the left-right direction with respect to the outer surface 121 that is an outer end in the left-right direction. In other words, the pin 22 is disposed so as not to protrude outward in the left-right direction from the front link 120. Although illustration is omitted, in the present embodiment, the laterally outer end of the sliding contact portion 22A of the left rotating frame 210 is also laterally inner than the laterally outer end of the outer surface of the front link 110. Is arranged.

  Returning to FIG. 13, the rotating frame 220 is arranged so that the side portion 23 is adjacent to one side in the left-right direction of the right side frame 11, specifically, the outside, and the frame fixing portion 24 is the side frame 11. It is arrange | positioned facing the upper surface. Further, the rotation frame 220 is connected to the right side frame 11 so as to be rotatable about a first axis L1 parallel to the left-right direction. Specifically, in the rotating frame 220, the rear end portion of the side portion 23 is connected to the vicinity of the center portion in the front-rear direction of the side frame 11 by a pin 291 so as to be vertically rotatable.

  As shown in FIG. 12, the pan frame 14 is arranged so as to bridge over the frame fixing portions 24, 24 of the left and right rotating frames 210, 220, and the left and right end portions are fixed to the frame fixing portions 24, 24. Has been. The rotating frames 210 and 220 are configured to swing the pan frame 14 that constitutes the front portion of the seat cushion S1 up and down by swinging the front end portion up and down with respect to the side frame 11.

  As shown in FIG. 13, the push-up links 230 and 240 are members for swinging the rotary frames 210 and 220 upward by pushing up the rotary frames 210 and 220.

The push-up link 240 is a plate-like member that is long in the front-rear direction, and includes a pipe insertion hole 241, a through hole 242, and a sector gear portion 243.
The pipe insertion hole 241 is a hole through which the front connection pipe 12 is inserted, and is formed at the rear end of the push-up link 240.
The sector gear portion 243 is a portion where the pinion gear 250 meshes, and is formed at the front end of the push-up link 240.

  The through hole 242 is a hole that is long in the front-rear direction, and is formed between the pipe insertion hole 241 and the sector gear portion 243 in the front-rear direction. The inner peripheral surface of the through hole 242 has a lower surface serving as a sliding contact portion 245 and an upper surface serving as a restricting portion 246. The slidable contact portion 245 is a portion that comes into contact with the slidable contact portion 22 </ b> A of the rotating frame 220 from below and slidably contacts the slidable contact portion 22 </ b> A when the rotating frame 220 is pushed up. The sliding contact portion 245 has a through hole 242 formed between the sector gear portion 243 and the pipe insertion hole 241 in the front-rear direction, so that the sector gear portion 243 and the pipe insertion hole 241 (second axis L2 (see FIG. 16) )). Further, the restricting portion 246 is provided so as to face the sliding contact portion 245 in the vertical direction and sandwich the sliding contact portion 22 </ b> A with the sliding contact portion 245.

  The push-up link 240 is arranged adjacent to the other side in the left-right direction of the right side frame 11, specifically, inside, so as to sandwich the right side frame 11 with the rotating frame 220. Further, the push-up link 240 and the side portion 23 of the rotating frame 220 are arranged so as to partially overlap each other when viewed from the left-right direction (see FIG. 16). Further, the push-up link 240 is connected to the side frame 11 so as to be rotatable about a second axis L2 (see FIG. 16) that is parallel to the left-right direction and is different from the first axis L1. Specifically, the push-up link 240 is connected to the front connection pipe 12 by welding in a state where the right end portion of the front connection pipe 12 is inserted into the pipe insertion hole 241, whereby the front connection pipe 12 and the side frame 11 are connected to the push-up link 240. It is integrally connected so that it can be rotated up and down.

The push-up link 230 is a plate-like member that is long in the front-rear direction, and includes a pipe engaging portion 231 and a through hole 242.
The pipe engaging portion 231 is a concave portion opened downward to engage with the front connecting pipe 12, and is formed at the rear end portion of the push-up link 230.
The through hole 242 is a hole that is long in the front-rear direction and is formed at the front end of the push-up link 230. Similarly to the through hole 242 of the right push-up link 240, the lower surface of the through hole 242 is a slidable contact portion 245 and the upper surface is a restricting portion 246.

  The push-up link 230 is disposed adjacent to the inside of the left side frame 11 in the left-right direction so as to sandwich the left side frame 11 with the rotating frame 210. Further, the push-up link 230 and the side portion 23 of the rotating frame 210 partially overlap each other when viewed from the left-right direction, similarly to the right push-up link 240 and the side portion 23 of the rotating frame 220 (see FIG. 16). Are arranged. Further, the push-up link 230 is connected to the front connection pipe 12 by welding in a state where the pipe engaging portion 231 is engaged with the left end portion of the front connection pipe 12. It is integrally connected so that it can be rotated up and down. Since the right and left push-up links 240 and 240 are connected by the front connecting pipe 12, they rotate together.

  The pinion gear 250 is a member that rotates the push-up link 240, and is rotatably supported by the right side frame 11 at a position on the front side of the push-up link 240.

As shown in FIG. 15, the first actuator 260 is a mechanism for driving the tilt mechanism 200 by rotationally driving the pinion gear 250, and mainly includes a motor 261 that can rotate forward and reverse, and a gear box 262. ing.
The gear box 262 is a member that houses a plurality of gears (not shown) for reducing the rotational driving force of the motor 261 and transmitting it to the pinion gear 250. The gear housed in the gear box 262 includes an input gear that receives rotational driving force from the shaft of the motor 261, an output gear that meshes with the pinion gear 250, and an output gear that decelerates the rotational driving force input to the input gear. A transmission gear for transmitting to the motor. With such a configuration, when the shaft of the motor 261 is rotationally driven in the third direction, the pinion gear 250 rotates counterclockwise in the drawing. When the shaft of the motor 161 is driven to rotate in a fourth direction opposite to the third direction, the pinion gear 250 rotates clockwise in the drawing.

  The first actuator 260 is attached to the third bracket 410 with a screw 281. On the other hand, a fourth bracket 420 is attached to the inner surface in the left-right direction at the front end of the right side frame 11 by welding or the like. The first actuator 260 is attached to the right side frame 11 via the brackets 410 and 420 by fixing the third bracket 410 to the fourth bracket 420 with screws 282.

  In the present embodiment, the first actuator 260 is attached closer to the right side frame 11 (one side frame 11) than the second actuator 160, specifically, inside the right side frame 11 in the left-right direction. Yes. On the other hand, as shown in FIG. 2, the second actuator 160 is closer to the left side frame 11 (the other side frame 11) than the first actuator 260, specifically, the upper constituting the left slide rail 30. It is attached to the upper surface of the rail 32. That is, in the present embodiment, the first actuator 260 is disposed on the right of the vehicle seat S, and the second actuator 160 is disposed on the left of the vehicle seat S.

Here, the operation of the tilt mechanism 200 will be described.
When the motor 261 (see FIG. 15) of the first actuator 260 is rotated in the third direction from the state shown in FIG. 16 and the pinion gear 250 rotates counterclockwise in the drawing, the right push-up link 240 moves the front connection pipe 12. Rotate upward to the center. At this time, since the left and right push-up links 230 and 240 are connected by the front connecting pipe 12, the left push-up link 230 also rotates upward together with the push-up link 240. Then, as shown in FIG. 17, the push-up links 230 and 240 move the sliding contact portion 22 </ b> A while the sliding contact portion 245 slides on the sliding contact portion 22 </ b> A of the rotating frames 210 and 220 by turning upward. Through which the rotating frames 210 and 220 are pushed upward. As a result, the pivot frames 210 and 220 swing upward about the pin 291, and accordingly, the pan frame 14 spanned around the pivot frames 210 and 220 swings upward. As a result, the front portion of the seat cushion S1 is raised, and the angle of the seating surface of the seat cushion S1 with respect to the horizontal plane can be increased.

  On the other hand, when the motor 261 of the first actuator 260 is driven to rotate in a fourth direction opposite to the third direction from the state shown in FIG. 17 and the pinion gear 250 rotates clockwise in the figure, the right push-up link 240 is connected to the front link. It pivots downward about the pipe 12. At this time, the left push-up link 230 also rotates downward together with the push-up link 240. Then, as shown in FIG. 16, the rotating frames 210 and 220 and the pan frame 14 swing downward about the pin 291 while the sliding contact portion 22A is in sliding contact with the sliding contact portion 245 by its own weight or the weight of the occupant. To do. As a result, the front portion of the seat cushion S1 is lowered, and the angle of the seating surface of the seat cushion S1 with respect to the horizontal plane can be reduced.

  According to the present embodiment described above, in the height adjustment mechanism 100, the rear end portion 151 of the rod 150 is disposed between the rear link 130 and the support link 170 so that the rear link 130 and the support link 170 can rotate. Since they are connected, the rear end portion 151 of the rod 150 can be supported by the rear link 130 and the support link 170 from both sides in the rotational axis direction. Thereby, the links 130 and 170 can operate stably without being twisted.

  Further, since the second connecting portion 132 of the rear link 130 is disposed at a position shifted to the support link 170 side with respect to the first connecting portion 131, a space is provided on the opposite side of the second connecting portion 132 from the support link 170 side. Can be secured. Thereby, since the rear link 130 can be disposed close to an adjacent member such as the left slide rail 30 by the space, the space in the vehicle seat S can be used effectively.

  Moreover, since the rear link 130 has the bulging part 134 in which the 2nd connection part 132 was formed, the rigidity of the rear link 130 is improved by the bulging part 134 compared with the structure whose rear link is a flat plate shape. Can be made.

  Further, since the support link 170 is fixed to the portion where the recess 13A of the rear connection pipe 13 is formed, the mounting rigidity of the support link 170 can be improved.

  Further, since the support link 170 is disposed in the space formed between the left side frame 11 and the occupant support member 15 in the left-right direction, the space in the vehicle seat S can be used effectively. Further, interference between the occupant support member 15 and the support link 170 can be suppressed.

  In addition, since the first bracket 310 has the bead portion 314 and the second bracket 320 is fixed to the bead portion 314, the rigidity of the first bracket 310 is improved by the bead portion 314, and the first bracket 310 has a portion with high rigidity. By fixing the two brackets 320, the mounting rigidity of the second bracket 320 can be improved. Thereby, the mounting rigidity of the second actuator 160 can be improved.

  Moreover, since the support link 170 is arrange | positioned in the position between a pair of 2nd walls 322 and 322 in the left-right direction, the support link 170 can be arrange | positioned compactly in the left-right direction. Thereby, the space in the vehicle seat S can be used effectively.

  Further, in the tilt mechanism 200, the rotating frames 210 and 220 are arranged on the outer side in the left-right direction of the side frame 11, and the push-up links 230 and 240 sandwich the side frame 11 between the corresponding rotating frames 210 and 220. Since the side frame 11 is disposed on the inner side in the left-right direction, for example, the rotating frames 210 and 220 are compared with the configuration in which both the pair of rotating frames and the push-up link are disposed on the left and right sides of the side frame. It is not necessary to consider so much the arrangement and shape so that the corresponding push-up links 230 and 240 do not interfere with each other. Thereby, since each member can be made into a simple structure, the structure of the tilt mechanism 200 can be simplified.

  Further, the sliding contact portions 245 of the push-up links 230 and 240 push up the rotating frames 210 and 220 while slidingly contacting the sliding contact portions 22A that extend inward in the left-right direction of the side frames 11 through the through holes 11A of the side frames 11. The rotating frames 210 and 220 and the push-up links 230 and 240 can be reduced in size as compared with the structure in which the sliding contact portion of the turn frame extends to the push-up link side above and below the side frame. Thereby, the tilt mechanism 200 can be made compact.

  Further, since the push-up links 230 and 240 have the restricting portion 246, for example, when the rotating frames 210 and 220 are about to turn upward due to a rear collision of the vehicle, the sliding contact portion 22A contacts the restricting portion 246. By contacting, the upward rotation of the rotation frames 210 and 220 can be restricted.

  Further, since the rotary frames 210 and 220 and the push-up links 230 and 240 are arranged so as to overlap each other when viewed from the left and right direction, for example, compared with a configuration in which the rotary frame and the push-up links are arranged to be shifted in the vertical direction. Thus, the tilt mechanism 200 can be made compact.

  Further, since the sliding contact portion 245 is disposed between the sector gear portion 243 and the pipe insertion hole 241 (second axis L2) in the front-rear direction, for example, the sliding contact portion and the sector gear portion are front and rear across the second axis. The push-up link 240 can be reduced in size in the front-rear direction as compared with the configuration arranged in FIG. Thereby, the tilt mechanism 200 can be made compact.

  Moreover, since the front end surface 22B of the pin 22 forming the sliding contact portion 22A is disposed on the inner side in the left-right direction with respect to the outer surface 121 of the front link 120, the pin 22 (the sliding contact portion 22A) moves outward in the left-right direction. The amount of protrusion can be suppressed. Thereby, the tilt mechanism 200 can be made compact in the left-right direction.

  In addition, since the first actuator 260 is disposed on the right side of the vehicle seat S and the second actuator 160 is disposed on the left side of the vehicle seat S, the two actuators are concentratedly attached near one side frame. Compared to the configuration, the degree of freedom in design such as the size, arrangement, and mounting method of the second actuator 160 can be improved.

  In addition, since the first actuator 260 is attached to the right side frame 11 on the inner side in the left-right direction, the degree of freedom in design is further improved as compared with the configuration in which the first actuator is attached to the outer side of the side frame in the left-right direction. be able to.

Although the embodiment has been described above, the present invention is not limited to the embodiment. About a concrete structure, it can change suitably in the range which does not deviate from the meaning of invention as follows.
For example, in the embodiment, the slide rail 30 is exemplified as the seat support member supported by the vehicle body, but the present invention is not limited to this. For example, the seat support member may be a bracket for fixing the vehicle seat to the floor of the vehicle body. Further, the seat support member may be the vehicle body itself.

  Moreover, in the said embodiment, although the passenger | crew support member 15 was the structure which has 15 A of seat springs and the connection member 15B which connects 15 A of seat springs, it is not limited to this. For example, the occupant support member may include a plurality of seat springs arranged on the left and right without including the connecting member. That is, the seat spring may not be connected. Referring to FIG. 3, when the occupant support member does not include the connecting member 15 </ b> B and is composed of seat springs 15 </ b> A arranged side by side, the support link 170 is connected to the left side frame 11. The seat spring 15A disposed closest to the left side frame 11 (the leftmost seat spring 15A) may be disposed.

  In the embodiment, the second actuator 160 is attached to the left upper rail 32 via the two-part bracket 300, and the first actuator 260 is attached to the right side frame 11 via the two brackets 410 and 420. Although it was attached, it is not limited to this. For example, the bracket for attaching the actuator may be composed of one part, or may be composed of three or more parts.

  Moreover, in the said embodiment, although the sliding contact part 245 and the control part 246 of the raising link 240 were provided in the through-hole 242 closed seeing from the left-right direction, it is not limited to this. For example, referring to FIG. 13, the slidable contact portion 245 and the restricting portion 246 are provided not in the through-hole 242 but in a recessed portion that is open in the front side and recessed backward as viewed from the left-right direction. May be. Further, the push-up link may have a configuration in which the upper side of the slidable contact portion is not provided without the restriction portion, for example, a configuration in which the upper surface of the push-up link is the slidable contact portion. In the above embodiment, the rotating frame 220 has the sliding contact portion 22A that extends inward through the through hole 11A of the side frame 11, and the push-up link 240 pushes up the sliding contact portion 22A with the sliding contact portion 245. However, the present invention is not limited to this. For example, the push-up link may have a sliding contact portion that extends outward through the through hole 11A of the side frame 11, and the sliding contact portion may be configured to push up the side portion 23 of the rotating frame 220. Further, the push-up link may be configured to push up the frame fixing portion 24 of the rotating frame 220.

  Moreover, in the said embodiment, although the 1st actuator 260 was attached near the right side frame 11, and the 2nd actuator 160 was attached near the left side frame 11, it is not limited to this. For example, the first actuator may be attached near the left side frame, and the second actuator may be attached near the right side frame. That is, the first actuator may be disposed on the left of the vehicle seat, and the second actuator may be disposed on the right of the vehicle seat. In this case, the rod and the support link of the height adjusting mechanism may be disposed on the right side of the vehicle seat, and the push-up link having the pinion gear and the sector gear portion of the tilt mechanism may be disposed on the left side of the vehicle seat. Moreover, you may arrange | position both a 1st actuator and a 2nd actuator on the left-right same side of a vehicle seat. Moreover, when arrange | positioning on the same side, you may attach one side of a 1st actuator and a 2nd actuator to the left-right direction inner side of a side frame, and may attach the other to the left-right direction outer side of a side frame.

  In the embodiment, the support link 170 (second link) is connected to the side frame 11 constituting the seat cushion S1 via the rear connection pipe 13 so as to be rotatable coaxially with the rear link 130 (first link). However, it is not limited to this. For example, the second link may be connected to a slide rail as a seat support member so as to be rotatable coaxially with the first link. The second link may be connected to both the seat cushion and the seat support member so as to be rotatable coaxially with the first link. Moreover, in the said embodiment, although the support link 170 arrange | positioned between the two rear links 130 and 140 was illustrated as a 2nd link, it is not limited to this, For example, a 1st link is a right-and-left rear link. When there is one, the second link may be the other of the left and right rear links.

  Moreover, in the said embodiment, although the rear link 130 as a 1st link was rotatably connected with the side frame 11 via the rear connection pipe 13, it is not limited to this, For example, of the said embodiment. Similarly to the front links 110, 120, etc., they may be pivotally connected to the side frames by pins or the like. Moreover, in the said embodiment, although the rear link 130 as a 1st link had the 1st connection part 131, the 2nd connection part 132, and the bulging part 134, it is not limited to this, For example, it is 1st The link may be a flat plate-like link such as the rear link 140 of the above embodiment. In the embodiment, the rear link 130 is exemplified as the first link. However, the present invention is not limited to this. For example, the first link may be a front link.

  In the above-described embodiment, the vehicle seat S includes the tilt mechanism 200. However, the present invention is not limited to this, and a configuration without the tilt mechanism may be used.

  Moreover, in the said embodiment, although vehicle seat S mounted in a motor vehicle was illustrated as a vehicle seat, it is not limited to this, Vehicles mounted in vehicles other than a motor vehicle, for example, a rail vehicle, a ship, an aircraft, etc. It may be a sheet for use.

DESCRIPTION OF SYMBOLS 11 Side frame 12 Front connection pipe 13 Rear connection pipe 13A Concavity 15 Crew support member 30 Slide rail 31 Lower rail 32 Upper rail 100 Height adjustment mechanism 130 Rear link 131 1st connection part 132 2nd connection part 134 Swelling part 150 Rod 151 Rear end portion 160 Second actuator 161 Motor 162 Gear box 163 Housing 170 Support link 300 Bracket 310 First bracket 314 Bead portion 320 Second bracket 321 First wall 322 Second wall S Vehicle seat S1 Seat cushion

Claims (9)

A vehicle seat comprising: a seat cushion; a seat support member supported by a vehicle body; and a height adjustment mechanism that raises and lowers the seat cushion with respect to the seat support member.
The height adjustment mechanism is
A first link rotatably connected to the seat cushion and the seat support member;
A rod that moves in the axial direction to rotate the first link to raise and lower the seat cushion with respect to the seat support member;
A second link that is arranged to be aligned with the first link in the rotation axis direction of the first link, and is connected to the seat cushion or the seat support member so as to be rotatable coaxially with the first link. Prepared,
One end of the rod is disposed between the first link and the second link, and is rotatably connected to the first link and the second link. The first link has a first connecting part connected to the seat cushion, and a second connecting part connected to the rod,
2. The vehicle seat according to claim 1, wherein the second connecting portion is disposed at a position shifted toward the second link with respect to the first connecting portion in the rotation axis direction. The first link has a bulging portion that bulges toward the second link in the rotation axis direction;
The vehicle seat according to claim 2, wherein the second connecting portion is formed in the bulging portion. The seat cushion includes left and right side frames that constitute left and right frames, and a connection pipe that connects the left and right side frames,
The connection pipe has a recess that is recessed toward the inside of the connection pipe, and is rotatably connected to the left and right side frames,
The vehicle according to any one of claims 1 to 3, wherein the second link is fixed to a portion of the connecting pipe in which the concave portion is formed in the rotation axis direction. Sheet. The seat cushion includes left and right side frames constituting left and right frames, a front frame that connects front portions of the left and right side frames, a rear frame that connects rear portions of the left and right side frames, and the front An occupant support member spanned between the frame and the rear frame,
5. The first link according to claim 1, wherein the second link is disposed between one of the left and right side frames and the occupant support member in the rotation axis direction. The vehicle seat according to the item. The height adjusting mechanism includes an actuator for reciprocating the rod in the axial direction,
A bracket for attaching the actuator to the seat support member;
The bracket is a first bracket that is fixed to the seat support member, and a second bracket that is fixed to the first bracket and holds the actuator so as to be rotatable about an axis parallel to the rotation axis direction. Have
The first bracket has a bead portion protruding upward,
The vehicle seat according to any one of claims 1 to 5, wherein the second bracket is fixed to the bead portion. The second bracket includes a first wall fixed to the bead portion, and a pair of second walls that rise from both left and right ends of the first wall and hold the actuator rotatably.
The vehicle seat according to claim 6, wherein the second link is disposed at a position between the pair of second walls in the rotation axis direction.   The actuator includes a motor, a gear box that houses a gear for transmitting the driving force of the motor to the rod, and a housing that holds the motor and the gear box and is rotatably attached to the second bracket. The vehicle seat according to claim 6 or 7, characterized by comprising: The seat support member includes a lower rail that is fixed to a vehicle body, and an upper rail that is slidably engaged with the lower rail.
The vehicle seat according to any one of claims 1 to 8, wherein the first link is rotatably connected to the upper rail.

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