JPH0527088Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a vehicle seat, and more particularly to a vehicle seat that allows a seated person to adjust to a desired seating posture.

[Prior art]

There are vehicle seats that allow the seated person to adjust to their preferred posture. something is shown. This type of seat generally has a seat cushion that moves back and forth, or a seat back that tilts back and forth.

[Problem that the invention attempts to solve]

By the way, in this type of vehicle seat, when the seat cushion is moved back and forth or the seat back is tilted to adjust to a desired seating position, even if the seated person is in a comfortable position, the seat lacks the ability to hold onto the seat. It is possible. In addition, in rear seats equipped with such functions,
When the seat cushion is moved forward, the leg space between it and the front seat becomes narrower, and when the seat back is tilted, a large gap must be secured between it and the package tray trim, making it difficult to hide the gap. In addition, the package tray trim must be reduced in size.

[Means for solving problems]

In order to address these problems, the present invention has a structure of a vehicle seat including a pair of movable parts formed by dividing at least one of a seat cushion and a seat back into two in the longitudinal direction, and a support for both movable parts. a link mechanism that is rotatable with respect to the member and supported so that the opposite end side can be depressed by a predetermined amount when rotated; and a link mechanism that is screwably assembled to the support member, and both of the movable parts rotate in conjunction with forward and backward movements. The present invention is configured to include an actuating member connected to the link mechanism so as to do so, and a driving means for transmitting the driving force of a motor disposed on the supporting member to the actuating member to cause the member to spirally move.

[Functions and effects of the idea]

In the vehicle seat configured as described above, when the driving means is operated to rotate both the movable parts, the seat cushion and/or the seat back, which are in a substantially flat state, are gradually depressed toward the longitudinally intermediate portion thereof. In addition, by controlling the operation of the driving means to control the amount of screwing of the actuating member, the amount of depression of the opposing ends of both movable parts can be finely adjusted according to the amount of screwing. Therefore, by adjusting the amount of depression of the seat cushion and/or the seat back, the seated person can adjust the sitting posture to his or her preference, thereby ensuring a comfortable posture.

According to the seat of the present invention, the seat cushion and/or seat back, which are in a substantially flat state, are gradually depressed toward the middle portion, thereby improving the ability to hold the lower body and/or upper body of the seated person. can be done. In addition, when the seat of the present invention is used as a vehicle seat, the leg space between the front seats will not be narrowed by adjusting the seating position, and the gap between the package tray trims can be reduced to hide the gap. It is possible to reduce or omit the package tray trim and enlarge the package tray trim.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a vehicle rear seat according to the present invention. The seat includes a seat cushion 10a and a seat bag 10b.
The seat cushion 10a includes a central portion and a pair of left and right fixed cushion portions 11a to 11c;
A pair of front and rear movable cushion parts 12a, 12b located between each fixed cushion part 11a, 11b;
It is comprised of a pair of front and rear movable cushions 13a, 13b located between each fixed cushion part 11a, 11c. The seat back 10b also has a center portion and a pair of left and right fixed back portions 14a to 14c corresponding to the seat cushion 10a, a pair of upper and lower movable back portions 15a and 15b located between the fixed back portions 14a and 14b, and a pair of upper and lower movable back portions 15a and 15b, respectively. It is composed of a pair of upper and lower movable bag parts 16a and 16b located between fixed bag parts 14a and 14c.
In such a seat cushion 10a, each of the fixed cushion parts 11a to 11c is independently assembled to the vehicle floor by a known means by a main frame (not shown), and each of the movable cushion parts 12a, 12b and 13a, 13b
is the link mechanism 20a which is the assembly means shown in FIG.
It is assembled to the main frame corresponding to the supporting member of the present invention, and is moved by the driving means 20b.
The main frame is assembled to the vehicle body floor by known means (not shown). Further, in the seat bag 10b, each fixed bag portion 14a to
14c are independently assembled to the rear panel by known means on the main frame (not shown), and each movable back portion 15a, 15b and 16a, 16b is attached to a link mechanism 30a, which is an assembling means shown in FIG. It is assembled to the main frame by the drive means 30b, and is moved by the drive means 30b.

Therefore, both movable cushion parts 12a, 12b
The link mechanism 20a for assembling is comprised of a pair of left and right first links 21 to sixth links 26. Each first link 21 is pivotally connected to each bracket 18a, 18b provided at the left and right front ends of the main frame 17a and subframe 17b, and each second link 22 is fixed to a cushion plate 17c and It is fixed to a shaft 17d rotatably supported by brackets 18c provided at the left and right rear ends of the frame 17a. The subframe 17b supports the pad 12a1, spring 12a2, etc. of the movable cushion portion 12a, and the cushion plate 17c supports the pad 12b1, etc. of the movable cushion portion 12. Each third link 23 has a bent shape and is fixed at its intermediate portion to a shaft 17e rotatably supported by a bracket (not shown) provided on the main frame 17a. Further, a lower end portion of each fourth link 24 is fixed to the shaft 17e. Each 5th link 2
5 is the lower end of each second link 22 and each third link 2
3, and connects both links 22 and 23. Further, the upper end portion of the fourth link 24 is pivotally connected to each bracket 18d provided at the left and right rear end portions of the subframe 17b. One end of the sixth link 26 is pivotally connected to the upper end of the third link 23, and the other end is connected to a movable rod 28 of a drive means 20b, which will be described later. As a result, both the movable cushion parts 12a and 12b are connected to the main frame 17.
It is assembled and supported by a. In addition, both movable cushion parts 13a and 13b are also connected to the link mechanism 20a.
It is assembled using the same link mechanism.

As shown in FIGS. 3 to 5, the drive means 20b includes an electric motor 27, a pair of left and right movable rods 28 corresponding to the actuating members of the present invention, and a pair of left and right housings 29 that support each movable rod 28. There is. The electric motor 27 includes rotating shafts 27a and 27b extending in the left-right direction, and each of these rotating shafts 27a and 27b is connected to each housing 29.
Each housing 29 has worms 27c and 27d on its tip end. Each worm 27c, 27d is attached to each housing 2.
Nuts 29a, 29b rotatably supported within 9.
It meshes with the outer peripheral thread of. Each movable rod 28
has a threaded portion 28a from its approximately center to the front, and is provided with a slide piece 28b at its rear end. Each movable rod 28 is attached to each nut 29
It is assembled into each housing 29 so that it can be screwed forward and backward by meshing with the inner circumferential threaded portions of a and 29b,
The slide piece 28b at the rear end is slidably inserted into the elongated hole 18h of each bracket 18g provided at the left and right intermediate portions of the main frame 17a. The other end of the sixth link 26 constituting the link mechanism 20a is rotatably attached to the slide piece 28b. Worm 27c, 27
d. The nuts 29a, 29b and the threaded portion 28a constitute a deceleration mechanism, which transmits the driving force of the motor 27 in a decelerated state to the movable rod 28 to move the movable rod 28 in the front and back direction, and The movement of the movable rod 28 in the front-rear direction is restricted by restricting rotation due to torque from the 28 side. A compression spring 28d is interposed between the flange portion 28c provided at the center of each movable rod 28 and each housing 29. This compression spring 28d urges the movable rod 28 rearward and assists its rearward movement. The driving means of the link mechanism for assembling the movable cushion parts 13a and 13b is also constructed in the same manner as the driving means 20b.

To explain the operation of the link mechanism 20a by driving the drive means 20b having such a configuration, the motor 27 constituting the drive means 20b is rotated in forward and reverse directions by switching the first switch, and each worm 27c,
27d, each movable rod 28 is moved in the front-back direction via each nut 29a, 29b. The state shown in FIG. 3 shows the state in which each movable rod 28 has moved backward to its maximum extent, and each movable rod 28 is restricted from further rearward movement by a stopper 28e provided at its front end. . In addition, each movable rod 28
When the movable rods 28 move forward, the slide piece 28b comes into contact with the front end of the elongated hole 18h, thereby restricting further forward movement of each movable rod 28. in this case,
Both movable cushion parts 12a and 12b form a flat seating surface that is substantially coplanar with both fixed cushion parts 11a and 11b. This state is the state shown by the solid line in FIG.
The positional relationship is the same as that of seats a and 11c, and the rear seat can accommodate three people.

In this state, when each movable rod 28 is moved forward by driving the motor 27, each movable rod 28
pulls each sixth link 26 forward, rotates each third link 23 integrally with shaft 17e, and rotates each fourth link 24 around shaft 17e.
Rotate counterclockwise as shown in the figure. As a result, the subframe 17b gradually moves to the state shown by the two-dot chain line, and each first link 21 rotates counterclockwise about the pivot portion of the bracket 18a.
On the other hand, each fifth link 25 moves upward due to the rotation of each third link 23, rotates each second link 22 in the counterclockwise direction shown in the figure, rotates the shaft 17d in the same direction, and rotates the cushion plate. 17c is rotated counterclockwise in the drawing around the shaft 17d. As a result, both movable cushion parts 12a, 1
2b gradually collapses toward the opposite end as shown by the two-dot chain line in FIG. 3, and reaches the state shown by the two-dot chain line in FIGS. 1 and 2. In addition, when each movable rod 28 is moved backward in this state, each link 21 to
26 is rotated or moved in the opposite direction to the above to rotate or move the subframe 17b and the cushion plate 17c.
Rotate in the opposite direction to the above. As a result, both movable cushion parts 12a and 12b return to rotation,
Together with both fixed cushion parts 11a and 11b, a flat seat surface is formed. The same applies to both movable cushion portions 13a and 13b.

However, the seat cushion 10 of the sheet concerned
According to a, both the front and rear movable cushion parts 12a, 1
Since the sitting posture is adjusted by gradually recessing the substantially flat seat surface formed by 2b, 13a, and 13b toward the opposite ends thereof, the lower body of the seated person can be held well. be. In particular, since the seat cushion 10a is provided with the fixed cushion parts 11a to 11c, each of the fixed cushion parts 11a to 11c forms a raised part on both sides when adjusting the sitting posture, and the holding property for the lower body of the seated person is even better. It is.
Further, since the seat cushion 10a hardly moves forward when adjusting the seating posture, there is no problem that the leg space between the front seats becomes narrow.

In this seat, the present invention is also applied to the seat back 10b, and both movable back portions 15a, 15b are assembled to the main frame by a link mechanism 30a and are movable by a drive means 30b. Further, both movable bag portions 16a and 16b are also assembled by a link mechanism similar to that described above, and are movable by a similar drive means.

As shown in FIG. 6, the link mechanism 30a
The first sub-frame 17f, which is constituted by the links 31 to 4th link 34 and supports the upper movable back portion 15a, is assembled to the main frame 17g together with each bracket, and the lower movable back portion 15b is assembled to the main frame 17g.
The second subframe 17h supporting the main frame 17g is assembled together with each bracket to the main frame 17g.

The first link 31 is rotatably connected to brackets 18i and 18j provided at the intermediate portions of the main frame 17g and the first subframe 17f, and the upper end of the second link 32 is connected to the main frame 17g.
The second subframe 17h is fixed to a rod 18m rotatably supported by a bracket 18k provided in the middle of the second subframe 17h.
It is slidably assembled to a bracket 18n provided at the upper end of the bracket. One end of a third link 33 is fixed to the rod 18m, and the other end of the third link 33 is pivotally connected to the lower ends of a pair of fourth links 34a, 34b. Further, the first link 31 and the second link 32 are rotatably connected to each other via the pin 18p, and both the fourth links 34
The upper end portions of a and 34b are pivotally connected to a slide piece 37 of a drive means 30b, which will be described later. The bracket 18q provided at the upper end of the first sub-frame 17f is slidably assembled into the arcuate elongated hole of the bracket 18r provided at the upper end of the main frame 17g, so that the first link 31 is moved clockwise. It is configured to move upward following the rotation. In this case, the arc-shaped elongated hole of the bracket 18r connects the movable back portion 15a and the headrest portion 15c.
To prevent openings or steps from occurring at the joint A of
The shape is such that the center of rotation is approximately the center of rotation. This improves appearance and ride comfort. Brackets 18s and 18t provided at the lower portions of the main frame 17g and the second subframe 17h are pivotably connected to each other. The upper and lower movable bag parts 16a and 16b are also assembled in the same manner as described above.

As shown in FIGS. 6 to 8, the drive means 30b consists of an electric motor 35 that rotates in forward and reverse directions, a rotating shaft 35a, and a slide piece 37 that corresponds to the actuating member of the present invention. It is supported by a frame 17g. motor 35
The rotating shaft 35a extends inside the housing 38, and is provided with a worm 35b at its tip. On the other hand, the rotating shaft 36 is rotatably assembled to the housing 38 while passing through the housing 38, and teeth 36a provided at the upper end thereof mesh with the worm 35b. Further, the rotating shaft 36 includes a threaded portion 36b, and the threaded portion 36b is provided with a threaded portion 36b.
A slide piece 37 is screwed onto 6b so that it can be screwed upwardly and downwardly. The vertical movement of the slide piece 37 is regulated by both stopper portions 36c and 36d.
The upper ends of both fourth links 34a, 34b are rotatably pivoted to both ends of this slide piece 37, respectively. In addition, both movable back parts 16a, 1
The driving means of the link mechanism for assembling 6b is also constructed in the same manner as the driving means 30b.

To explain the operation of the link mechanism 30a by driving the drive means 30b having such a configuration, the motor 35 constituting the drive means 30b is rotated in forward and reverse directions by switching the second switch, and the rotating shaft 36 is rotated in the forward and reverse directions via the worm 35b. Rotate to move the slide piece 37 up and down. The state shown in FIG. 6 shows the state in which the slide piece 37 is lowered to the maximum extent. In this case, both movable back parts 15a, 15
b forms a substantially coplanar flat back surface with both fixed back portions 14a and 14b. This state is the state shown by the solid line in FIG.
The positional relationship is the same as that with a and 14b, and the rear seat is in a state where three people can be seated.

In this state, when the slide piece 37 is moved upward by the drive of the motor 35, the slide piece 37 pulls up both links 34a and 34b and rotates the third link 33 in the counterclockwise direction as shown in FIG. As a result, the rod 18m integrated with the third link 33 and the second link 32 rotate in the same direction, causing the second sub-frame 17h and the lower movable back portion 15b to rotate as shown by the two-dot chain line in the figure. . On the other hand, as the second link 32 rotates counterclockwise in the drawing, the first link 31 connected to the second link 32 by the pin 18p rotates clockwise in the drawing around the pivot portion of the bracket 18i, and The first sub-frame 17f and the upper movable back portion 15a are rotated as shown by the two-dot chain line in the figure. As a result, both movable bag portions 15a and 15b gradually collapse toward the opposing ends, resulting in the state shown by the two-dot chain line in FIGS. 1 and 2. Further, when the slide piece 37 is moved downward in this state, each link 31 to 34 rotates or moves in the opposite direction to the above, and both subframes 17
Rotate f and 17h in the opposite direction to the above. As a result, both movable back portions 15a, 15b return to rotation, forming a flat back surface together with both fixed back portions 14a, 14b. In addition, both movable back parts 1
The same applies to the 6a and 16b sides.

According to the seat back 10b of the seat, the seating posture is achieved by gradually recessing the substantially flat back surface formed by the upper and lower movable back portions 15a, 15b and 16a, 16b toward their opposing ends. Since it adjusts the position of the seat, the upper body of the seated person can be held well. In particular, since the seat back 10b is provided with the fixed back parts 14a to 14c, each of the fixed back parts 14a to 14c forms protrusions on both sides when adjusting the seating posture, so that the upper body of the seated person can be held even better. . In addition, in this seat back 10b, since the entire seat back 10b is not tilted back and forth when adjusting the seating posture, it is possible to reduce the gap between the package tray trims, reduce or omit the gap concealment, and enlarge the package tray trim. can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a vehicle rear seat according to an embodiment of the present invention, FIG. 2 is a side view of the movable parts of the seat, and FIG. 3 is a side view of the link mechanism and drive means on the seat cushion side. Fig. 4 is a partially cutaway rear view of the driving means, Fig. 5 is a sectional view taken along the line V-V in Fig. 4, Fig. 6 is a side view of the link mechanism and the driving means on the seat back side, and Fig. 7. 8 is a partially cutaway rear view of the driving means, and FIG. 8 is a partially cutaway plan view of the same. Explanation of symbols, 10a... Seat cushion, 1
0b...Seat bag, 11a-11c...Fixed cushion part, 12a, 12b, 13a, 13b
...Movable cushion part, 14a to 14c...Fixed bag part, 15a, 15b, 16a, 16b...
Movable back part, 17a, 17g...main frame, 17b, 17f, 17h...subframe,
20a, 30a...link mechanism, 20b, 30b
...driving means.

Claims (1)

[Scope of utility model registration request] A pair of movable parts formed by dividing at least one of the seat cushion and the seat bag into two in the longitudinal direction, and both movable parts are rotatable relative to the support member, and the opposing end sides can be depressed by a predetermined amount when rotated. a link mechanism that is supported by the support member; an operating member that is screwably assembled to the support member and connected to the link mechanism such that both of the movable parts rotate in conjunction with forward and backward movement; and an operating member that is disposed on the support member. A vehicle seat comprising: a drive means for transmitting the driving force of a motor provided to the actuating member to cause the actuating member to move in a spiral manner.