JP2005000300A - Ottoman device for vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To retain a safe driving posture by preventing the upward turning of a seat cushion and an ottoman, when a seat back is slightly rearward tilted from a reference rearward tilt position. <P>SOLUTION: This ottoman device for the vehicle seat is so formed that the ottoman turns upward while the front part of the seat cushion turns upward by a link mechanism 11 associated with the rearward tilt of the seat back. The seat back and the link mechanism 11 are connected with a cam mechanism 10, or the guide member, formed of a pin groove and a horizontal pin and the cam mechanism 10 is associated with the link mechanism 11 in the rear of a position where the seat back rearward tilts from a first-stage lock position to a predetermined angle. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ottoman device for a vehicle seat.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a vehicle seat in which an ottoman is rotated upward while a front portion of a seat cushion is rotated upward by a link mechanism in conjunction with the backward inclination of the seat back (for example, Patent Document 1). reference).
[0003]
This ottoman is provided in order to improve the sitting comfort by supporting the thigh of the seated person by adjusting the vertical rotation angle.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-53053
[Problems to be solved by the invention]
However, the seated person may want to tilt the seat back only slightly from the reference backward tilt position, for example, during a long drive. In such a case, in Patent Document 1, since the seat cushion and the ottoman rotate up and down in synchronization with the forward and backward tilting of the seat back, the seat back of the driver's seat is removed during the driving of the vehicle. There is a problem that the seat cushion and the ottoman rotate upward in conjunction with the slight backward tilt from the reference backward tilt position.
[0006]
Also, in the passenger seat and the rear seat, when it is desired to tilt only the seat back slightly from the reference backward tilt position, if the seat cushion and the ottoman rotate upwards against the seated person's intention, there is a problem. is there.
[0007]
The present invention has been made to solve the above problems. When the seat back is slightly tilted backward from the reference backward tilt position, the seat cushion and the ottoman are devised so that the seat cushion and the ottoman do not rotate upward. It is an object of the present invention to provide an ottoman device for a vehicle seat that can maintain a proper driving posture and the like.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention relates to a vehicle seat in which an ottoman rotates upward while a front portion of a seat cushion is rotated upward by a link mechanism in conjunction with a rearward tilt of a seat back. In the ottoman device,
The seat back and the link mechanism are connected by an interlocking mechanism, and the interlock mechanism is configured so that the link mechanism is interlocked after the position where the seat back is tilted backward from the reference backward tilt position to a predetermined angle. The vehicle seat ottoman device is provided.
[0009]
Preferably, the interlock mechanism is configured such that the link mechanism is not interlocked when the seat back tilts forward from the reference backward tilt position.
[0010]
According to a third aspect of the present invention, the interlocking mechanism includes an operation pin provided in the link mechanism and a guide hole provided in the seat back and engaged with the operation pin. It is preferable to adopt a configuration in which the cam is formed so that operation / non-operation of the operation pin can be selected.
[0011]
Operation and effect of the invention
According to the present invention, the interlock mechanism between the seat back and the link mechanism is such that the link mechanism is interlocked after the position where the seat back is tilted backward from the reference backward tilt position to a predetermined angle. In addition, when the seat back is tilted slightly backward from the reference backward tilt position, the seat cushion and the ottoman do not rotate upward, so that a safe driving posture and the like can be maintained.
[0012]
According to the second aspect, the interlock mechanism prevents the link mechanism from being interlocked when the seat back is tilted forward from the reference backward tilt position. Therefore, during operation of the vehicle, the seat back is moved from the reference backward tilt position. When the vehicle is tilted slightly forward, the seat cushion and the ottoman do not rotate downward, so that a safe driving posture can be maintained.
[0013]
According to the third aspect of the present invention, the interlocking mechanism can be composed of the operating pin and the cam-shaped guide hole, so that the structure is very simple and the operation is reliable.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a ottoman device for a vehicle, wherein (a) is a first-stage lock position (corresponding to a reference rearward tilt position), (b) is a seatback forward tilt position, and (c) is a perspective view showing a seatback rearward tilt position. FIG.
[0015]
As shown in FIG. 1, the vehicle seat 1 includes a seat cushion 2 and a seat back 3 that is supported at the rear portion of the seat cushion 2 so as to be tiltable forward and backward. An ottoman 4 is supported on the front portion of the seat cushion 2 so as to be rotatable up and down.
[0016]
In FIG. 1A, the seat cushion 2 is substantially horizontal and the seat back 3 is substantially upright with respect to a floor (not shown). At this time, the ottoman 4 is suspended from the front end portion of the seat cushion 2, and the ottoman 4 is not in the use position. When the seat occupant releases the locked state, as shown in FIG. 1B, the seat back 3 is tilted forward. At this time, the seat cushion 2 remains substantially horizontal, and the ottoman 4 also hangs down. It remains. By releasing this locked state, the seated person can push the seat back 3 with his back and tilt it back to a desired angle. With this operation, as shown in FIG. 1 (c), the front portion of the seat cushion 2 is slightly lifted, and the ottoman 4 is rotated upward to the use position. And the rotation angle of the ottoman 4 can be adjusted at a plurality of angles by a ratchet mechanism of a reclining device (not shown).
[0017]
2 to 5 are views showing an internal structure of the vehicle seat, in which FIG. 2 is a perspective view seen from the left side in the traveling direction of the vehicle, FIG. 3 is a perspective view seen from the right side, FIG. Is a right side view, and FIG. 5 is an exploded perspective view of the left side as viewed from the center. 2A to 4C correspond to FIGS. 1A to 1C, respectively.
[0018]
The internal structure of the vehicle seat 1 includes left and right lower rails 5 fixed on a floor (not shown) and extending in parallel in the front-rear direction, left and right upper rails 6 slidably mounted on the left and right lower rails 5, Left and right side frames 7 attached to the upper rail 6 via a link mechanism 11 and the like, and an ottoman frame 8 attached to the front ends of the left and right side frames 7 so as to be rotatable in the vertical direction. And. The ottoman 4 is attached to the ottoman frame 8. Here, the link mechanism 11 is slidably engaged with a pin groove 102 as a guide hole of the guide member 101, which is a feature of the present invention, and slidably engaged with the pin groove 102. An ottoman device that can take a desired posture of the ottoman 4 is configured by being connected to the reclining device 9 via a cam mechanism (corresponding to an interlocking mechanism) 10 including a horizontal pin 104 as an operating pin. is doing.
[0019]
Hereinafter, each element of the ottoman device will be described in detail. In specifying the shape of each element, it is assumed that the seat back 3 is at a so-called design reference position (corresponding to a position tilted backward from the reference backward tilt position to a predetermined angle) at the boundary where the seat back 3 becomes the backward tilt position. (See FIG. 6A).
[0020]
The lower rail 5 is provided with a leg portion 51 for fixing to an appropriate position on the floor.
[0021]
The upper rail 6 is provided with triangular plate-like brackets 62 and 63 that are erected at the front and rear ends, respectively, to which the link mechanism 11 and the like can be attached. The upper rail 6 can be slid to an arbitrary part of the lower rail 5, and can be fixed by a lock mechanism (not shown) at that part.
[0022]
The side frame 7 includes four horizontal shafts 72 to 75 that rigidly support the front and rear ends of the left and right side frames 7, and a short length for attaching the ottoman frame 8 to the front end portion of the side frame 7. The horizontal shaft 76 protrudes toward the sheet center side (front side in FIG. 5).
[0023]
The ottoman frame 8 includes a U-shaped pipe-shaped main body portion 81 and plate-shaped attachment portions 82 that are installed at both left and right ends of the main body portion 81 and bent at both ends forward. The left and right upper end portions 821 of the mounting portion 82 are pivotally supported on the distal end portion of the side frame 7 via the horizontal shaft 76 and the screw parts 77.
[0024]
The main body 91 of the reclining device 9 is brought into contact with the bracket 63 from the left outer side (back side in FIG. 5) of the upper rail 6 and is screwed together. A main body 91 of the reclining device 9 includes a rotating portion 92 that includes a lock ratchet mechanism (not shown) including a lock gear and a ratchet that restricts the rotation of the lock gear. The rotating portion 92 is attached to the guide member 101. It is fixed with three screw parts 103. In addition, 93 is an operation lever of the reclining device 9, and by this operation, the ratchet of the ratchet mechanism is released from the lock gear and the rotating portion 92 is unlocked. The rotating part 92 is locked. Reference numeral 94 denotes a connecting member for connecting the reclining device 9 to the framework 31 of the seat back 3.
[0025]
The guide member 101 has a mushroom shape in which a part of the disc protrudes obliquely downward, and the upper half is concentric with the disc and the lower half is, for example, an Archimedean spiral from the center of the disc. A pin groove 102 formed so as to gradually move away is provided. A horizontal pin 104 provided at an upper end portion of a first link 111 described later is slidably engaged along the inner surface of the pin groove 102 (see FIG. 6), and the cam mechanism 10 is configured.
[0026]
The link mechanism 11 includes a first link 111, a second link 112, a third link 113, a fourth link 114, and a fifth link 115. The first link 111 is made of a short plate-like member that extends vertically, and is pivotally supported at substantially the center of the bracket 63 so as to be rotatable along the surface of the bracket 63 on the seat center side. A horizontal pin 104 projects from the upper end of the first link 111 toward the seat center, and the lower end of the first link 111 is pin-coupled to the rear end of the second link 112.
[0027]
The second link 112 is composed of a long plate-like member extending in the front-rear direction, and is movable in the front-rear direction and swingable in the up-down direction along the surface of the upper rail 6 on the seat center side.
[0028]
The third link 113 is formed of a deformed triangular plate-like member that extends with the apex bent upward and rearward with respect to the bottom in the vertical direction, and the upper end of the bottom is parallel to the bracket 62 of the upper rail 6. 64 are connected. For this purpose, the bracket 62 is formed with a bearing 65 at the upper end, and the left end of the horizontal shaft 64 is engaged with the bearing 65. The lower end of the bottom side of the third link member 113 is connected to the front end of the second link 112 by a horizontal pin 116.
[0029]
The fourth link 114 is made of a short plate-like member extending obliquely (upwardly forward) with respect to the vertical direction, and the lower end portion thereof is pin-coupled to the apex of the third link 113. The upper end portion of the fourth link 114 is connected to the front end portion of the side frame 7 via the horizontal shaft 73. For this purpose, a bearing portion 77 is formed at the front end portion of the side frame 7, and the left end portion of the horizontal shaft 73 is engaged with the bearing portion 77.
[0030]
The fifth link 115 is a short plate-like member extending in the front-rear direction. The rear end portion of the fifth link 115 is pivotally supported by a horizontal pin 117 on an intermediate projecting portion of the fourth link 114. A front end portion of the fifth link 115 is pin-coupled to an intermediate portion 822 at both left and right ends of the attachment portion 82 of the ottoman frame 8.
[0031]
Subsequently, the operation of the ottoman device will be described. 6A and 6B are explanatory views showing the operation around the cam mechanism 10, wherein FIG. 6A is a design reference position, FIG. 6B is a first-stage lock position, FIG. 6C is a forward tilt position of the seat back, and FIG. The back tilt position is shown.
[0032]
At the design reference position shown in FIG. 6A, the horizontal pin 104 provided at the upper end portion of the first link 111 is in a substantially middle portion in the pin groove 102 of the guide member 101. The center line of the attachment member 94 of the seat back 3 is assumed to be at the position c1 in the figure. This position is a design reference position, and the first-stage lock position is used as the actual seat setting position of the completed vehicle.
[0033]
That is, in the first-stage lock position shown in FIG. 6B, the center line of the mounting member 94 of the seat back 3 is at the position c2 in the drawing. The position of c2 is at a forward tilt position by an angle (corresponding to a predetermined angle) θ1 from the position of c1. Correspondingly, the pin groove 102 of the guide member 101 rotates in the clockwise direction in the figure by the same angle θ1, and the horizontal pin 104 is in a position moved slightly upward in the pin groove 102 of the guide member 101. No force is acting between the pin groove 102 and the horizontal pin 104. At this time, the link mechanism 11 and the like are in the same posture or state as the design reference position (FIGS. 2A and 3). (See (a) and FIG. 4 (a)).
[0034]
Next, it is assumed that the seated person operates the operation lever 93 of the reclining device 9. Then, as long as the ratchet of the reclining device 9 is released from the lock gear (unlocked) and the seated person does not press the seat back 3 with his / her back or the like, the seat back 3 is automatically as shown in FIG. It becomes a forward tilt position. The center line of the mounting member 94 of the seat back 3 is at the position c3 in the drawing. The position of c3 is a forward tilt position by an angle θ2 from the position of c2. Correspondingly, the pin groove 102 of the guide member 101 rotates in the clockwise direction in the drawing by the same angle θ2, and the horizontal pin 104 is stopped at the position moved to the upper end portion in the pin groove 102 of the guide member 101. However, since the pin groove 102 is concentric with respect to the center of the disc portion of the guide member 101, at this time, the pin groove 102 and the horizontal pin 104 are in an idling state in which no force acts. (See FIG. 2 (b), FIG. 3 (b), and FIG. 4 (b)).
[0035]
Next, it is assumed that the seated person pushes the seat back 3 with the back or the like while operating the operation lever 93 of the reclining device 9 and tilts backward to the design reference position shown in FIG. At the design reference position, the center line of the mounting member 94 of the seat back 3 returns from the position c3 to the position c1 in the drawing. Correspondingly, the pin groove 102 of the guide member 101 rotates counterclockwise in the figure by the same angle θ2 + θ1, and the horizontal pin 104 is substantially in the middle of the pin groove 102 of the guide member 101. In this case, since the pin groove 102 remains concentric, the horizontal pin 104 is in an idling state where no force acts on the horizontal pin 104 at this time.
[0036]
Further, it is assumed that the seated person pushes the seat back 3 with the back or the like while operating the operation lever 93 of the reclining device 9 to set the rearward tilt position. Then, since the ratchet of the reclining device 9 regulates the rotation operation of the lock gear, the seat back 3 tilts backward at a predetermined pitch, and can be set to the rearward tilt position as shown in FIG. Then, when the seated person stops operating the operation lever 93 of the reclining device 9 at the tilted position thereafter, the locked state is established. At this time, the center line of the mounting member 94 of the seat back 3 is at a position c4 in the drawing. The position of c4 is a position inclined backward from the position of c1 by an angle θ3. Correspondingly, the pin groove 102 of the guide member 101 rotates counterclockwise by the same angle θ3 in the drawing, and the horizontal pin 104 stops at the position where it has moved to the lower end within the pin groove 102 of the guide member 101. However, at this position, the pin groove 102 is eccentric so as to be away from the center of the disc portion of the guide member 101, and at this time, a forward (rightward in FIG. 6D) force acts on the horizontal pin 104. To do.
[0037]
Then, the first link 111 of the link mechanism 11 rotates in the clockwise direction, and the lower end portion thereof moves rearward. Therefore, the second link 112 is pulled in the same direction, and the lower end portion of the bottom side of the third link 113 is moved rearward. As a result, the third link 113 rotates clockwise about the horizontal axis 64.
[0038]
Next, the third link 113 rises and pushes the lower end of the fourth link 114 at its tip, so the fourth link 114 also rotates counterclockwise while pushing up the horizontal shaft 73 that is the center of rotation. As a result, the front portion of the side frame 7 is pushed up, and the seat cushion 2 is in a slightly upward posture. At the same time, the fifth link 115 attached to the intermediate portion of the fourth link 114 pushes the intermediate portion 822 of the attachment portion 82 in the forward direction at the front end portion thereof. The pushing force causes the ottoman frame 8 to rotate counterclockwise about the horizontal shaft 76 (upward rotation) and push up the tip thereof, so that the ottoman 4 is automatically lifted to the use position (FIG. 2 ( c), FIG. 3 (c), and FIG. 4 (c)).
[0039]
On the other hand, it is assumed that the seated person operates the operation lever 93 of the reclining device 9 again. Then, the ratchet of the reclining device 9 is released from the lock gear (unlocked), and the seat back 3 is again in the forward tilt position as shown in FIG. That is, at this time, the link mechanism 11 and the cam mechanism 10 operate in reverse to the above, and the ottoman 4 is automatically lowered to the non-use position. Then, when the seated person pushes the seat back 3 with the back or the like while operating the operation lever 93 of the reclining device 9, the seated person returns to the first stage locked position as shown in FIG. 6B, and the seated person reclines at the first stage locked position. When the operation of the operation lever 93 of the device 9 is stopped, the locked state is established again.
[0040]
By the way, in the driver's seat, the seated person may want to tilt the seat back 3 slightly backward from the first-stage lock position, for example, during long driving. Even in such a case, according to this embodiment, the interlocking mechanism between the seat back 3 and the link mechanism 11 is the link mechanism 11 after the design reference position where the seat back 3 is tilted backward from the initial stage lock position to a predetermined angle. Since the seat cushion 2 and the ottoman 4 do not rotate upward even if the seat back 3 is tilted slightly backward from the first-stage lock position during driving of the vehicle, a safe driving posture is achieved. Can be maintained.
[0041]
Further, even in the passenger seat and the rear seat, the seated person may want to tilt the seat back only slightly from the reference backward tilt position during a long drive. Even in such a case, the seat cushion 2 and the ottoman 4 do not rotate upward against the intention of the seated person, so that a desired posture can be maintained.
[0042]
Furthermore, in this embodiment, since it consists only of a pure mechanical configuration such as the link mechanism 11 or the like, no power is required. Accordingly, since a heavy motor or the like is not required, the operation is extremely light and simple, and the operation is reliable. Further, since power is not consumed, energy saving is also achieved.
[0043]
In the above embodiment, the link mechanism 11 is not interlocked until the seat back 3 is tilted backward from the first-stage lock position to a predetermined angle, and when the seat back 3 tilts forward from the first-stage lock position. However, although the link mechanism 11 is not interlocked, it is not always necessary to implement both. For example, only the former may be implemented.
[0044]
In the above-described embodiment, the cam mechanism 10 including the pin groove 102 of the guide member 101 and the horizontal pin 104 has been described as the interlocking mechanism. However, other types of cam mechanisms (for example, spring biasing on the outer periphery of the guide member) are described. In addition, the cam mechanism 10 may be replaced with another interlocking mechanism (for example, a separate link mechanism).
[Brief description of the drawings]
FIG. 1 is a ottoman device for a vehicle, wherein (a) is a first-stage lock position, (b) is a seat back forward tilt position, and (c) is a perspective view showing a seat back rear tilt position.
FIG. 2 is a diagram showing an internal structure of a vehicle seat, and is a perspective view seen from the left side in the traveling direction of the vehicle.
FIG. 3 is a view showing the internal structure of the vehicle seat, and is a perspective view seen from the right side in the traveling direction of the vehicle.
FIG. 4 is a view showing the internal structure of the vehicle seat, and is a right side view in the traveling direction of the vehicle.
FIG. 5 is a diagram showing the internal structure of the vehicle seat, and is an exploded perspective view of the left side as viewed from the center in the traveling direction of the vehicle.
6A and 6B are explanatory views showing the operation of the ottoman device around the cam mechanism, where FIG. 6A is a design reference position, FIG. 6B is a first-stage lock position, FIG. 6C is a forward tilt position of the seat back, and FIG. FIG. 4 is a view showing a backward tilt position of the seat back.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 3 Seat back 4 Ottoman 5 Lower rail 6 Upper rail 7 Side frame 8 Ottoman frame 9 Reclining device 10 Cam mechanism (corresponding to interlocking mechanism)
101 Guide member (corresponding to an interlocking mechanism)
102 Pin groove (corresponds to the guide hole of the interlock mechanism)
104 Horizontal pin (corresponds to the operating pin for the interlock mechanism)
11 Link mechanism

Claims (3)

In the ottoman device for a vehicle seat in which the ottoman is rotated upward while the front portion of the seat cushion is rotated upward by the link mechanism in conjunction with the backward inclination of the seat back,
The seat back and the link mechanism are connected by an interlocking mechanism, and the interlock mechanism is configured so that the link mechanism is interlocked after the position where the seat back is tilted backward from the reference backward tilt position to a predetermined angle. An ottoman device for a vehicle seat. 2. The ottoman device for a vehicle seat according to claim 1, wherein the interlocking mechanism does not interlock the link mechanism when the seat back is tilted forward from the reference rearward tilt position. The interlock mechanism is composed of an operating pin provided in the link mechanism and a guide hole provided in the seat back and engaged with the operating pin. The ottoman device for a vehicle seat according to claim 1 or 2, wherein the ottoman device is formed in a cam shape capable of selecting non-operation.

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