JP6084871B2 - Ottoman device for vehicle seat - Google Patents

Description

  The present invention relates to a ottoman device for a vehicle seat that is used by being attached to a vehicle seat.

As a prior art of an ottoman device for a vehicle seat, for example, there is one disclosed in Patent Document 1.
The ottoman device includes a fixed portion (bracket) fixed to the front portion of the cushion of the vehicle seat, a link mechanism that can be extended and shortened and having one end (rear end) supported by the fixed portion, and other link mechanisms. And an ottoman supported at the end (front end).

The link mechanism includes a first link group and a second link group.
The first link group includes a first base end link that is rotatably connected to the fixed portion, one end rotatably connected to the first base end link, and the other end rotatably connected to the ottoman. And a first series link.
On the other hand, the second link group includes a second base end link that is rotatably connected to the fixed portion, one end rotatably connected to the second base end link, and the other end rotatable relative to the ottoman. A second link link (consisting of a plurality of links) to be connected.
Furthermore, the intermediate part of the second linkage link (one link constituting the second link) is rotatably connected to the intermediate part of the first base end link.

When the link mechanism is in the shortened state approaching the fixed part side, the ottoman is located at the retracted position approaching the fixed part side.
On the other hand, when the link mechanism extends to the front, the ottoman moves from the storage position to the front use area. Therefore, the passenger sitting on the seat can place his / her feet on the ottoman.

Japanese Patent No. 4645315

Generally, the seat cushion is attached to the vehicle floor surface via a slide rail device or the like provided on the vehicle floor surface, and a space is formed between the front portion of the cushion and the vehicle floor surface. Also, in this space, a slide drive device for sliding the seat (upper rail of the slide rail device) with respect to the vehicle floor (lower rail of the slide rail device) and the front part of the cushion is raised and lowered relative to the rear part. In many cases, a lifter device or the like is provided.
Since the fixing part of the ottoman device is fixed to the front part of the cushion, when the link mechanism is in a shortened state and the ottoman is located in the retracted position, the first base end link and the second base end link are connected to the cushion front part. Enter the space between the vehicle floors.

However, since a slide drive device, a lifter device, etc. are arranged in the space, if the amount of the first base end link and the second base end link entering the space when the ottoman is located at the storage position increases, There is a possibility that the one base end link or the second base end link may interfere with the slide drive device or the lifter device.
Therefore, when the ottoman is located at the storage position, it is ideal to reduce the amounts of the first base link and the second base link entering the space.
However, in the ottoman device of Patent Document 1, the intermediate portion of the first proximal link and the intermediate portion of the second linkage link (one link constituting the second link) are rotatably connected. The two proximal links restrict the rotational movements of each other. Therefore, the degree of freedom in designing the rotation trajectory of the first base link and the second base link is low, and therefore the space of the first base link and the second base link when the ottoman is located at the retracted position. It is difficult to reduce the amount of entry to.

  The present invention provides a vehicle seat capable of reducing the amount of entry into the space between the seat front portion of the first base end link and the second base end link and the vehicle floor surface when the ottoman is located at the retracted position. It is an object to provide an ottoman device.

An ottoman device for a vehicle seat according to the present invention includes a fixing portion that is fixed to a vehicle seat, a storage position that approaches the fixing portion, and an ottoman that is movable between a use area that is separated from the fixing portion, and the fixing portion. And a link mechanism that moves the ottoman to the storage position and the use area by extending and contracting the ottoman, and the link mechanism supports the ottoman and is separated from the fixed portion. one linkage link, and a first link unit having said first associated link and said rotatably connected against the fixed portion has been first proximal link, and the remote the ottoman from support and the fixed part two linkage links, and includes a second link group having said second linkage link and a second proximal link is rotatably connected against the said fixed part, and the said first proximal link The second base end link is rotatable independently of each other; the second base end link is further rotatably connected to a restricting means for restricting rotation of the second base end link; The first linkage link and the second linkage link are pivotally attached to each other, and the first link group and the second link group are interlocked .

The second base end link extends from a rotation center that is a rotation connection portion with respect to the fixed portion, and is connected to the regulation means so as to be rotatable, and the rotation center to the first connection portion . a second connecting portion rotatably connected to the second connection link extends in a direction crossing against may be provided.

  A rotation restricting link rotatably connected to the first connecting portion; an unlocked state linked to the rotation restricting link and allowing rotation of the rotation restricting link; and a locked state restricting rotation. Locking means that can be switched between.

In the ottoman device for a vehicle seat according to the present invention, the first base end link and the second base end link are rotatably supported by the fixed portion.
That is, since the first base end link and the second base end link are not rotatably connected to each other, the first base end link and the second base end link do not restrict each other's rotational motion.
Therefore, compared with the case where the 1st base end link and the 2nd base end link are connected rotatably, the freedom degree of design of the rotation locus of the 1st base end link and the 2nd base end link becomes high. Therefore, when the ottoman is located at the retracted position, it is possible to reduce the amount of entry into the space between the seat front portions of the first base end link and the second base end link and the vehicle floor surface.
Moreover, since the first link link and the second link link are pivotally attached to each other and the first link group and the second link group are interlocked, the first and second link groups can be synchronized.

  When configured as in the invention of claim 2, the amount of the second base end link entering the space when the ottoman is located at the retracted position is smaller than when the second base end link is configured as a linear member. It becomes possible to make it smaller.

  If comprised like invention of Claim 3, adjustment of the relative movement amount with respect to the fixing | fixed part of an ottoman (link mechanism) is attained.

  If comprised like invention of Claim 4, it will become possible to arrange | position a control means in the limited space (the freedom degree of arrangement | positioning goes up).

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a seat cushion of a vehicle seat according to an embodiment of the present invention and an ottoman device attached to the front portion of the seat cushion, with the ottoman positioned at a retracted position and omitting a motor and advancing / retreating member. It is a side view similar to FIG. 1 when an ottoman moves to a front end position. It is an exploded perspective view of an ottoman device. It is a perspective view of an ottoman device when an ottoman is located in a storing position. It is a perspective view of an ottoman device when an ottoman is located in a front end position.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The direction in the following description is based on the arrow direction in the figure.
A pair of left and right slide rail devices (not shown) are provided on the vehicle floor surface of the vehicle on which the vehicle seat 10 shown in FIG. 1 is mounted. The left and right slide rail devices include a lower rail that is fixed to the floor surface in the vehicle and extends in the front-rear direction, and an upper rail that is slidably supported on the lower rail. A seat cushion 11 of the vehicle seat 10 is fixed to the upper surfaces of the left and right upper rails, and a seat back (not shown) is rotatably attached to the rear portion of the seat cushion 11. As shown in the figure, a space S is formed between the front portion of the seat cushion 11 and the vehicle interior floor surface. In this space S, a slide rail motor (not shown) fixed to the lower rail is disposed. When the slide rail motor rotates forward, the upper rail (seat cushion 11 and seat back) moves forward with respect to the lower rail, and when the slide rail motor reverses, the upper rail (seat cushion 11 and seat back) moves backward with respect to the lower rail. Moving.
Further, a lifter mechanism (not shown) is provided between the front part of the upper rail and the front part of the seat cushion 11. The lifter mechanism includes a lifter link mechanism that can be expanded and contracted in the vertical direction, and a lifter motor for expanding and contracting the link mechanism. This lifter mechanism is also disposed in the space S. When the lifter motor rotates in the forward direction, the lifter link mechanism extends, so that the front portion of the seat cushion 11 is lifted upward relative to the rear portion. On the other hand, when the lifter motor reverses, the lifter link mechanism contracts, so that the front portion of the seat cushion 11 is lowered relative to the rear portion.

A power-type ottoman device 13 is attached to the front end portion of the lower surface of the seat cushion 11 of the vehicle seat 10.
The ottoman device 13 has a structure described below.
The ottoman device 13 includes a pair of left and right fixing portions 14A and 14B. In the circular holes formed in the left and right fixing portions 14A and 14B, both end portions of a columnar connecting shaft 16 extending in the left-right direction are respectively fitted rotatably. At two locations on the connecting shaft 16, coupling recesses 17a formed on the left and right side walls of the first base end link 17 having a U-shaped cross section are fitted in a fixed state. A pair of left and right second proximal links 18 are rotatably connected to the left and right fixing portions 14A and 14B by a pair of rotational connection pins 20 extending in the left-right direction. The second base end link 18 is substantially L-shaped in a side view, and a first connection portion 18b extending linearly from a rotation center hole 18a (rotation center) through which the rotation connection pin 20 passes, and a first connection from the rotation center hole 18a. And a second connecting portion 18c linearly extending in a different direction from the portion 18b. At the front end portions of both side walls of the first base end link 17, the rear end portions of a pair of left and right ottoman side rear links 21 (first series links) are rotatable by a pair of left and right rotating connection pins 22 extending in the left and right direction. Connected. The rear end portion of the intermediate link 24 (second link link) extending in a direction substantially parallel to the first base end link 17 is rotatable at the front end portion of the second connecting portion 18c of the left and right second base end links 18. Connected. The intermediate link 24 is a member having a U-shaped cross section, and the rear end portions of the left and right side walls thereof are second connection portions of the left and right second base end links 18 by a pair of rotary connection pins 25 extending in the left-right direction. Each is connected to the tip of 18c so as to be rotatable. Further, the middle part of the left and right ottoman side rear links 21 and the middle part of the right and left side walls of the intermediate link 24 are connected to each other by a pair of rotational connection pins 26 extending in the left-right direction. Further, at the front end portions of the left and right side walls of the intermediate link 24, a pair of left and right ottoman side front links 28 (second linkage links) rear end portions parallel to the ottoman side rear link 21 extend in the left and right direction. The rotary connection pins 29 are connected to each other so as to be rotatable. As shown in the drawing, the overall length of the ottoman side front link 28 is substantially half of the ottoman side rear link 21.

Further, on the left and right sides of the first base end link 17, there are respectively positioned integral rotation links 31 (rotation restriction links) having a substantially triangular shape in side view, and coupling recesses 31 a provided in the left and right integral rotation links 31 are connected. The shaft 16 is fitted in a fixed state with respect to the vicinity of both left and right ends of the shaft 16. A pair of left and right interlocking links 33 (rotation restricting links) are positioned outside the left and right integral rotating links 31, and the end of the integral rotating link 31 opposite to the coupling recess 31 a is connected to the interlocking link 33. One end portion is rotatably connected via a pair of rotational connection pins 34 extending in the left-right direction. Further, the other end portions of the left and right interlocking links 33 are rotatably connected to the distal end portions of the first connection portions 18b of the left and right second base end links 18 via a pair of rotation connection pins 35 extending in the left-right direction. Yes. As shown in the drawing, the linear distance from the rotary connection pin 20 (the rotation center hole 18a of the second proximal link 18) to the rotary connection pin 25 is longer than the linear distance from the rotary connection pin 20 to the rotary connection pin 35.
The connecting shaft 16, the first proximal link 17, the second proximal link 18, the rotary connection pin 20, the ottoman side rear link 21, the rotary connection pin 22, the intermediate link 24, the rotary connection pin 25, and the rotary connection pin 26 described above. The ottoman side front link 28, the rotation connection pin 29, the integral rotation link 31, the interlocking link 33, the rotation connection pin 34, and the rotation connection pin 35 are components of the link mechanism 15. The connecting shaft 16, the first base end link 17, the ottoman side rear link 21, and the rotary connection pin 22 are components of the first link group 15A, and the second base end link 18, the rotary connection pin 20, and the intermediate link 24 are included. The rotation connection pin 25, the ottoman side front link 28, and the rotation connection pin 29 are components of the second link group 15B. The link mechanism 15 can be deformed into a shortened state shown in FIGS. 1 and 4, a maximum deployed state shown in FIGS. 2 and 5, and a state between the shortened state and the maximum deployed state.

An ottoman 38 is attached to the front ends of the left and right ottoman side rear links 21 and the ottoman side front links 28 of the link mechanism 15. The ottoman 38 includes a rectangular base plate 39 that is long in the left-right direction, and a cushion 40 (see an imaginary line in FIG. 1) that is fixed to the surface and peripheral surface of the base plate 39.
Ends of the left and right ottoman side front links 28 are rotatably connected to the left and right side walls of the base plate 39 by a pair of left and right rotation connection pins 36 extending in the left-right direction. Further, the left and right side walls of the base plate 39 are rotatably connected to the left and right ottoman side rear links 21 by a pair of left and right rotary connecting shafts 37 extending in the left-right direction. Since the ottoman 38 is rotatably supported by the link mechanism 15 (the ottoman side rear link 21 and the ottoman side front link 28) as described above, the fixing portion 14A is interlocked with the shortening operation and the unfolding operation of the link mechanism 15. The distance in the front-rear direction with respect to 14B is changed. That is, when the link mechanism 15 is in the shortened state, the ottoman 38 is located at the storage position shown in FIGS. 1 and 4, and when the link mechanism 15 in the shortened state is extended forward, the ottoman 38 is moved to the use area (storage position). Move to a more forward area. When the link mechanism 15 is fully extended forward, the ottoman 38 is located at the front end position (the front end position of the use region) shown in FIGS.

Both end portions of a driving device support member 42 extending in the left-right direction are fixed to the rear ends of the left and right fixing portions 14A and 14B, and a driving device 45 is supported on the driving device support member 42.
The driving device 45 includes a spindle 46, a motor 49 (locking means), and an advance / retreat member 54 as large components.
A rear end portion of a spindle 46 that extends linearly is rotatably attached to a bracket fixed to the central portion of the front surface of the driving device support member 42 via a rotary connection pin 47 that extends in the left-right direction. A screw groove (not shown) is formed on the outer peripheral surface of the spindle 46.
A motor 49 is fixed to the spindle 46. The motor 49 includes a case 50 and a rotation driving unit provided inside the case 50. A cylindrical projection 51 projects from the front portion of the case 50, and the motor 49 includes a motor through hole 52 that penetrates the entire case 50 (including the cylindrical projection 51) in the front-rear direction. The spindle 46 passes through the motor through hole 52 of the motor 49, and the screw groove of the spindle 46 meshes with a worm wheel (not shown) that is an output part of the rotation drive unit inside the motor 49.
An advancing / retracting member 54 extending in the left-right direction is fixed to the cylindrical protrusion 51 of the motor 49. A fixing hole 55 is formed at the center of the advance / retreat member 54. The fixing hole 55 of the advance / retreat member 54 is fitted to the cylindrical protrusion 51 from the front, and the fixing hole 55 and the cylindrical protrusion 51 are fixed to each other. Further, mounting holes 57 are formed in a pair of mounting pieces 56 formed by bending both the left and right ends of the advancing and retracting member 54. The left and right attachment pieces 56 of the advancing / retracting member 54 are opposed to the inner surfaces of the left and right side walls of the first base end link 17, and are connected to the left and right via rotating connection pins 59 that extend in the left and right directions through the left and right attachment holes 57. Are attached to the left and right side walls of the first base link 17 so as to be rotatable.
Among the configurations described above, the connecting shaft 16, the first base end link 17, the integral rotary link 31, the interlocking link 33, the spindle 46, the motor 49, the advance / retreat member 54, and the rotary connection pin 59 are components of the restricting means.

When an operation switch (not shown) provided on the vehicle seat 10 is located at the OFF position, the electric power generated by the power supply (not shown) provided on the vehicle is not supplied to the motor 49, so the motor 49 does not operate.
When the operation switch is operated from the OFF position to the normal rotation operation position, the electric power generated by the power source is supplied to the motor 49, and the motor 49 performs the normal rotation operation (the motor 49 is unlocked). Then, the link mechanism 15 is deformed in the extending direction, and the ottoman 38 moves to the front end position side. When the operation switch is operated to the reverse operation position, the motor 49 performs the reverse operation (the motor 49 is unlocked). Then, the link mechanism 15 is deformed in the shortening direction, and the ottoman 38 moves to the storage position side.
Since the motor 49 is restricted from rotating around the spindle 46 by the advance / retreat member 54 (and the first base end link 17), when the motor 49 performs a forward rotation operation, the motor 49 is relatively slid forward along the spindle 46. To do. Then, the forward moving force of the motor 49 is transmitted to the first base end link 17 via the advance / retreat member 54 and the rotary connection pin 59, and the first base end link 17 is centered on the connecting shaft 16 in the timepieces of FIGS. Since it rotates around, the link mechanism 15 performs a deployment operation. Further, when the motor 49 performs the reverse rotation operation, the motor 49 relatively slides rearward along the spindle 46, so that the rearward movement force of the motor 49 is transmitted through the advance / retreat member 54 and the rotary connection pin 59. It is transmitted to link 17. Then, the first base end link 17 rotates about the connecting shaft 16 counterclockwise in FIGS. 1 and 2, and the link mechanism 15 performs the shortening operation.
On the other hand, when the motor 49 is stopped (the motor 49 is in the locked state) (when the operation switch is in the OFF position), the brake is applied between the thread groove of the spindle 46 and the worm wheel of the motor 49. Force (friction resistance) is generated. This braking force is transmitted to the first base end link 17 via the advance / retreat member 54 and the rotary connection pin 59, and further to the first base link 17, the connecting shaft 16, the integral rotary link 31, and the interlocking link 33. It is transmitted to the two base end links 18. Therefore, when the motor 49 is stopped, the relative slide of the motor 49 with respect to the spindle 46 is restricted, and the expansion / contraction operation of the link mechanism 15 is restricted. Accordingly, when the ottoman 38 is located at any position, if the motor 49 is stopped (the operation switch is located at the OFF position), the ottoman 38 (and the link mechanism 15) is held at that position.

The ottoman device 13 of the present embodiment exhibits a remarkable effect when the ottoman 38 is located at the storage position.
That is, the first proximal link 17 of the ottoman 13 fixed portion 14A, and rotatably connected for the 14B and ottoman side rear links 21, while the left and right second proximal link 18 fixed portion 14A, for the 14B and middle links 24 that are rotatably connected. Since the first base end link 17 and the second base end link 18 are not rotatably connected to each other, the first base end link 17 and the second base end link 18 do not restrict the rotational operations of each other. Therefore, the degree of freedom in designing the rotation trajectory of the first base end link 17 and the second base end link 18 is higher than when the first base end link 17 and the second base end link 18 are rotatably connected. Therefore, the ottoman device 13 (link mechanism 15) is designed so that the amount of the first proximal link 17 and the second proximal link 18 entering the space S is small when the ottoman 38 is located at the retracted position. Is possible. Therefore, it is possible to prevent the first base end link 17 and the second base end link 18 from interfering with the slide rail motor and the lifter mechanism disposed in the space S when the ottoman 38 is located at the retracted position. .

  Further, since the second base end link 18 is formed in a non-linear shape, the second base end link when the ottoman 38 is located at the retracted position as compared with the case where the second base end link 18 is configured as a linear member. The amount of entry into the 18 spaces S can be further reduced.

  Further, a linear distance from the rotational connection pin 20 (the rotational center hole 18a of the second base end link 18) to the rotational connection pin 25 (hereinafter, distance 1) and a linear distance from the rotational connection pin 20 to the rotational connection pin 35 ( Hereinafter, since the distance 2) is different from each other, the relative movement amount of the ottoman 38 (link mechanism 15) with respect to the fixing portions 14A and 14B can be adjusted. That is, if the distance 1 is made longer than the distance 2 as in the present embodiment, the amount of forward movement of the intermediate link 24 when the ottoman 38 is moved from the storage position to the use area increases. Can be moved to. On the other hand, when the distance 1 is shorter than the distance 2, the forward movement amount of the ottoman 38 can be reduced.

As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this embodiment, It can implement, giving various deformation | transformation.
For example, the link mechanism 15 may be a link mechanism having a different structure by changing the number and arrangement of links or the specific shape of each link. As an example, the first linkage link that connects the first proximal link 17 and the ottoman 38 is configured by a plurality of link members, or the second linkage link that connects the second proximal link 18 and the ottoman 38 is a single link. You may comprise by a link member or three or more link members.

  Further, the drive unit 45 is omitted, and a manual type locking means (which links the integrated rotating link 31 directly or indirectly to the locking means) that can be switched between a locked state and an unlocked state is attached to the link mechanism 15. Thus, the ottoman device 13 may be changed to a manual ottoman device.

In the above embodiment, adjacent link members are connected to each other so as to be rotatable relative to each other using a rotation connecting pin separate from the link member, but a convex portion is integrally provided on one of the two adjacent link members. In addition, a concave portion or a through hole in which the convex portion is rotatably fitted may be formed on the other side.
Further, a linear distance (distance 1) from the rotary connection pin 20 (the rotation center hole 18a of the second base link 18) to the rotary connection pin 25, and a linear distance from the rotary connection pin 20 to the rotary connection pin 35 (distance 2). And the same distance.
Further, the second proximal link 18 may be configured as a linear member.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 11 Seat cushion 13 Ottoman apparatus 14A Fixing part 14B Fixing part 15 Link mechanism 15A First link group 15B Second link group 16 Connection shaft (regulation means)
17 First proximal link (regulatory means)
17a Connection recess 18 Second base end link 18a Rotation center hole (rotation center)
18b 1st connection part 18c 2nd connection part 20 Rotation connection pin 21 Ottoman side rear link (1st connection link)
22 Rotating connection pin 24 Intermediate link (second linkage link)
25 26 Rotating connection pin 28 Ottoman side front link (second linkage link)
29 Rotation Connection Pin 31 Integral Rotation Link (Regulator) (Rotation Restriction Link)
31a Coupling recess 33 Interlocking link (restricting means) (rotation restricting link)
34 35 36 37 Rotating connection pin 38 Ottoman 39 Base plate 40 Cushion 42 Drive device support member 45 Drive device 46 Spindle (regulating means)
47 Rotating connection pin 49 Motor (regulating means) (locking means)
50 Case 51 Cylindrical protrusion 52 Motor through hole 54 Advancement / retraction member (regulation means)
55 Fixing hole 56 Mounting piece 57 Mounting hole 59 Rotating connection pin (regulating means)
S space

Claims (4)

A fixing part for fixing to the vehicle seat;
An ottoman movable between a storage position approaching the fixed portion and a use area spaced from the fixed portion;
A link mechanism for connecting the fixed part and the ottoman and moving the ottoman to the storage position and the use area by expanding and contracting;
With
The link mechanism
The first linkage link away the ottoman from support and the fixed part, and a first link unit having said first associated link and said rotatably connected against the fixed portion has been first proximal link, and,
Second linkage link away the ottoman from support and the fixed part, and a second link group having said second linkage link and the rotatably connected against the fixed portion has been second proximal link, and,
With
The first base end link and the second base end link are rotatable independently of each other;
The second base end link is further connected to a restricting means for restricting rotation of the second base end link; and
The first linkage link and the second linkage link are pivotally attached to each other, and the first link group and the second link group are interlocked;
An ottoman device for a vehicle seat. The ottoman device for a vehicle seat according to claim 1,
The second base end link extends from a rotation center that is a rotation connection portion with respect to the fixed portion, and is connected to the regulation means so as to be rotatable, and the rotation center to the first connection portion. An ottoman device for a vehicle seat, comprising: a second connecting portion extending in a direction intersecting the second connecting portion and rotatably connected to the second linkage link. The ottoman device for a vehicle seat according to claim 2 ,
The regulation means
A rotation restricting link rotatably connected to the first connecting portion;
Lock means linked to the rotation restricting link and capable of switching between an unlocked state allowing rotation of the rotation restricting link and a locked state restricting rotation;
An ottoman device for a vehicle seat comprising: The ottoman device for a vehicle seat according to any one of claims 1 to 3,
The vehicle seat ottoman device, wherein the restricting means is a drive source that rotationally drives the first base end link and the second base end link to drive the ottoman to extend and contract.

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