JP2018177162A - Ottoman apparatus for vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exemplary ottoman apparatus for a vehicular seat, with which the number of drive sources, such as an electric motor, may be reduced.SOLUTION: Movement of a first supporter 31 along with swing in forth and back direction of a seat is transmitted to a second supporter 32 via a cable 61B. Thereby, the second supporter 32 slides to be displaced relatively to the first supporter 31 in a linked manner with an action of a displacement mechanism. Therefore, a specific drive source for sliding the second supporter 32 may be omitted. Accordingly, an ottoman apparatus for a vehicular seat may be obtained, with which the number of drive sources may be reduced.SELECTED DRAWING: Figure 7

Description

  The present application relates to an ottoman device applied to a vehicle seat.

  For example, in the ottoman device described in Patent Document 1, the leg base can be extended and contracted in order to support the legs of the occupant. Specifically, the leg base is configured to have a first support and a second support. The second support obtains driving force from the electric motor fixed to the first support and slides relative to the first support.

Unexamined-Japanese-Patent No. 4-224711

The ottoman device described in Patent Document 1 includes, in addition to the electric motor for sliding the second support, the first support, that is, the electric motor for swinging the leg base in the vertical direction.
The present application discloses an example of a vehicle seat ottoman device capable of reducing the number of drive sources such as an electric motor.

  The ottoman device for a vehicle seat is a first support (31) for supporting the legs of the seat occupant and a second support (32) for supporting the legs of the seat occupant, the first support ( 31) a second support (32) slidable with respect to 31), and a displacement mechanism (50) for swingingly displacing the first support (31) while moving the first support (31) in the seat longitudinal direction And a cable (61B) for sliding the second support (32) and a first restricting portion (61C) fixed to the first support (31), wherein the cable (61B) is the cable (61B). 61B) and restricting the radial displacement of the cable (61B) in the axial direction of the cable (61B), and a first support (31) A second control unit (61D) fixed to the Regulated that Le (61B) is displaced in the radial direction, and includes a second restricting portion for allowing the cable (61B) is displaced in the axial direction and (61D).

  One end side (61E) of the cable (61B) is connected to the second support (32). The first restricting portion (61C) is provided at a position forward of the seat from the connecting portion between the cable (61B) and the second support (32).

  In the other end side (61F) of the cable (61B), the length dimension (L2) from the other end side (61F) to the second restricting portion (61D) changes in conjunction with the operation of the displacement mechanism (50) It is linked to the site. The "length dimension (L2)" refers to the length along the cable (61B).

  Thereby, the cable (61B) is displaced relative to the first support (31) in conjunction with the operation of the displacement mechanism (50). For this reason, the second support (32) is slidingly displaced with respect to the first support (31) in conjunction with the operation of the displacement mechanism (50).

  Therefore, it becomes possible to abolish the dedicated drive source for sliding the second support (32). As a result, it is possible to obtain a vehicle seat ottoman device capable of reducing the number of drive sources (51B).

The vehicle seat ottoman device may have the following configuration.
That is, even if the displacement mechanism (50) has (a) a slider (51A) for swinging the first support (31) or (b) a configuration having an X link type link mechanism Good.

  The cable further includes a pulley (62) whose rotational center is not displaced regardless of the operating state of the displacement mechanism (50), and the other end (61F) of the cable (61B) is a first support (6) via the pulley (62). 31) is desirable.

  As a result, the displacement amount of the cable (61B) can be increased without increasing the seat longitudinal dimension of the vehicle seat ottoman device. Therefore, the slide displacement of the second support 32 can be increased without increasing the size of the vehicle seat ottoman device.

  Incidentally, the reference numerals in each of the above parentheses are an example showing the correspondence with the specific configuration and the like described in the embodiments described later, and the present invention is limited to the specific configuration and the like shown in the reference numerals in the above parentheses. It is not a thing.

It is a perspective view of the ottoman device 1 concerning a 1st embodiment of the present invention. It is a perspective view of the ottoman device 1 concerning a 1st embodiment of the present invention. It is a side view of ottoman device 1 concerning a 1st embodiment of the present invention. It is an exploded view of ottoman device 1 concerning a 1st embodiment of the present invention. It is operation | movement explanatory drawing of the ottoman apparatus 1 which concerns on 1st Embodiment of this invention. It is a perspective view of the ottoman device 1 concerning a 1st embodiment of the present invention. A and B are operation explanatory diagrams of the ottoman device 1 according to the first embodiment of the present invention. It is a side view of the ottoman device 1 concerning a 2nd embodiment of the present invention. A and B are operation explanatory drawings of the ottoman apparatus 1 based on 2nd Embodiment of this invention.

  The "embodiments of the invention" described below show an example of an embodiment within the technical scope of the present invention. That is, the invention-specifying matters and the like described in the claims are not limited to the specific configuration and the structure and the like described in the following embodiments.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the arrow etc. which show the direction attached to each figure are described in order to make it easy to understand the relationship of each figure. The present invention is not limited to the directions given in the respective drawings.

  At least one member or part described with at least a reference numeral is provided unless otherwise noted. That is, when there is no notice of "one" etc., two or more said members may be provided.

First Embodiment
1. Outline of Ottoman Device In the present embodiment, the ottoman device according to the present invention is applied to a vehicle seat such as a vehicle seat. The ottoman device 1 shown in FIG. 1 is provided on the front end side of a vehicle seat (not shown).

  Specifically, the ottoman device 1 is fixed to the front panel Fp. The front panel Fp is a panel-like strength member provided at the front end of the cushion frame (not shown). The cushion frame is a frame member of a seat cushion (not shown).

  The ottoman device 1 includes a leg support 3 and a drive device 5 and the like. The leg support portion 3 is a member for supporting the legs of the occupant. The driving device 5 is a device for driving the leg support 3 as shown in FIGS. 2 and 3.

2. 2. Details of Ottoman Device 2.1 Structure of Leg Support As shown in FIG. 4, the leg support 3 has at least a first support 31 and a second support 32 and the like. The first support 31 and the second support 32 are members for supporting the legs of the occupant. The first support 31 and the second support 32 according to the present embodiment are configured by plate-like members.

  The second support 32 is slidable relative to the first support 31. Specifically, as shown in FIG. 5, the second support 32 is moved to the first support 31 so that the distance L1 from the front end of the seat cushion changes in conjunction with the swing displacement of the leg support 3. Slide against.

  That is, when the tip end 3A of the leg support portion 3 is swung and displaced from the lower side to the upper side, the distance L1 increases in conjunction with this. When the tip 3A of the leg support portion 3 is swung and displaced from the upper side to the lower side, the distance L1 decreases in conjunction with this.

  A pad 3 B is provided on the upper surface of the second support 32. The pad 3B is an elastic body such as urethane. The surface of the pad 3B is covered by a skin (not shown). The “upper surface of the second support 32” is the “upper surface of the second support 32” when the tip 3A of the leg support 3 is positioned at the uppermost position.

  As shown in FIG. 4, guide members 31 </ b> A are provided in the sheet width direction (left and right direction) of the first support 31. The pair of guide members 31A guides the slide displacement of the second support 32. The pair of guide members 31 </ b> A guides the slide displacement while slidably supporting the second support 32 by sliding contact with the second support 32.

2.2 Drive Device <Overview of Drive Device>
As shown in FIG. 6, the drive device 5 is configured to have a displacement mechanism 50, a cable mechanism 60, and the like. The displacement mechanism 50 is a mechanism that swings and displaces the first support 31, that is, the leg support 3. The cable mechanism 60 is a mechanism that causes the second support 32 to slide relative to the first support 31 in mechanical interlocking with the swing displacement of the leg support 3.

<Configuration of displacement mechanism>
As shown in FIG. 6, the displacement mechanism 50 is configured to include a slider device 51, a swing link mechanism 55, and the like. The slider device 51 includes a slider 51A, a drive source 51B, and the like. The slider 51A obtains a driving force from the drive source 51B and displaces the leg support portion 3, that is, the first support body 31 by displacing in the longitudinal direction of the seat.

  That is, the slider 51A is a rod-like member extending in the longitudinal direction of the seat. The front end side of the sheet of the slider 51A is rotatably connected to the movable bar 55A. The pair of rails 51C supports both end sides of the movable bar 55A in the extension direction, and slides in conjunction with the slider 51A.

  The drive source 51B exerts a force to displace the slider 51A. The drive source 51B includes an electric motor (not shown), a gear mechanism (not shown), and the like. The gear mechanism converts "the rotational force of the electric motor" into "the force to move the slider 51A in parallel".

  The link mechanism 55 includes a movable bar 55A, a swing arm 55B, a first link member 55C, a second link member 55D, and the like. The “swing arm 55B, the first link 55C, and the second link 55D” according to this embodiment are provided on one end side (left end side) and the other end side (right end side) in the sheet width direction. .

  The swing arm 55B provided on the left end side, the first link member 55C and the second link member 55D, and the swing arm 55B provided on the right end side, the first link member 55C and the second link member 55D are symmetrical in left and right It is a structure. Hereinafter, the swing arm 55B provided on the left end side, the first link member 55C, and the second link member 55D will be described as an example, and these 55B to 55D will be described.

  The swinging arm 55 </ b> B is a member that supports the first support 31. The movable bar 55A extends in the sheet width direction. Each of the pair of swing arms 55B is rotatably connected to the movable bar 55A. The center of rotation of each swing arm 55B coincides with the central axis of the movable bar 55A.

  One end side of the first link member 55C and one end side of the second link member 55D are rotatably connected to each other. The other end side of the second link member 55D is rotatably connected to the rail holding portion 55E. The rail holding portion 55E holds the rail 51C slidably and is fixed to the cushion frame side via the front panel Fp.

  The other end side of the first link member 55C is rotatably connected to a bracket 55F (see FIG. 4) fixed to the movable bar 55A. The second sector gear 55H meshing with the first sector gear 55G is provided on the other end side (see FIG. 4). The first sector gear 55G is integrated with the swing arm 55B.

  For this reason, when the movable bar 55A moves in parallel in the longitudinal direction of the seat, the angle of the first link member 55C with respect to the swing arm 55B changes accordingly, so the second sector gear 55H moves relative to the first sector gear 55G. To rotate. That is, when the slider 51A slides, the swinging arm 55B swings and displaces mechanically interlockingly with the slider 51A.

<Configuration of cable mechanism>
The cable mechanism 60 comprises at least a control cable 61, as shown in FIG. 7A. The control cable 61 is a member for sliding the second support 32 relative to the first support 31 as shown in FIG. 7B.

  The control cable 61 includes at least a tubular tube 61A and a flexible cable 61B. The cable 61B is movably inserted into the tube 61A.

  Due to the function of the control cable 61, the tube 61A does not have to be a single continuous tube from one longitudinal end to the other. As shown in FIG. 6, the tube 61A according to the present embodiment is constituted by a first tube 61C at one end side in the longitudinal direction and a second tube 61D at the other end side in the longitudinal direction.

  The first tube 61C is a metal tube curved in a substantially U shape. The second tube 61D is configured of a tubular terminal fitting member. In addition, the tube 61A described in FIG. 7A and FIG. 7B represents the control cable 61 schematically.

  The first tube 61C and the second tube 61D, that is, one end side and the other end side of the tube 61A are fixed to the first support 31 as shown in FIG. The first tube 61 </ b> C and the second tube 61 </ b> D are an example of a regulating unit having the following functions (a) and (b).

  That is, the first tube 61C and the second tube 61D, that is, the restriction portion has a function of restricting (a) displacement of the cable 61B in the radial direction of the cable 61B, and (b) an axial line of the cable 61B. It exerts the function of allowing displacement in the direction.

  One end side 61E of the cable 61B (hereinafter, referred to as a first connecting portion 61E) is connected to the second support 32 as shown in FIG. 7A. The end of the first tube 61C on the side of the first connecting portion 61E is located on the seat front side relative to the first connecting portion 61E.

  The "seat front side" refers to the "seat front side" when the distance L1 increases, that is, when the second support 32 separates from the seat cushion and the leg support portion 3 expands.

  In other words, the end of the first tube 61C on the side of the first connecting portion 61E is located closer to the tip of the first support 31 than the first connecting portion 61E. The second tube 61D is provided on the seat rear side with respect to the first tube 61C, that is, on the seat cushion side with respect to the first tube 61C.

The other end side 61F of the cable 61B (hereinafter, referred to as a second connection portion 61F) is connected to a portion satisfying the following requirements.
That is, the portion is “a portion where the length dimension L2 from the second connection portion 61F to the second tube 61D changes in conjunction with the operation of the displacement mechanism 50”. The “length dimension L2 from the second connection portion 61F to the second tube 61D” refers to the length along the cable 61B.

  The second connecting portion 61F according to the present embodiment is connected to the first support 31 via a pulley 62 provided in the cable mechanism 60 (see FIG. 6). Therefore, the “length dimension L2” in this embodiment refers to the length along the cable 61B which is curved in a substantially U shape from the second connection portion 61F to the second tube 61D.

  The pulley 62 is provided at a portion (for example, the front panel Fp) at which the rotation center is not displaced regardless of the operating state of the displacement mechanism 50. The cable mechanism 60 has a spring 63. The spring 63 exerts an elastic force on the second support 32 in the direction in which the second support 32 approaches the front end of the seat cushion, that is, in the direction in which the distance L1 is reduced.

3. Operation and Characteristics of Ottoman Device When the slider 51A moves to the seat front side, the seat cushion side end (movable bar 55A) of the first support 31 moves from the position shown in FIG. 7A to the seat front side. The length of the cable 61B, that is, the length from the first connecting portion 61E to the second connecting portion 61F is unchanged.

  Therefore, when the movable bar 55A moves to the seat front side, as shown in FIG. 7B, the cable 61B is brought close to the end of the first tube 61C on the first connecting portion 61E side of the first tube 61C. Moving.

  That is, “the length dimension L2 from the second connection portion 61F to the second tube 61D” and “the distance L3 from the first connection portion 61E to the end portion on the first connection portion 61E side of the first tube 61C” are displaced It changes in conjunction with the operation of the mechanism 50.

  In other words, the cable 61B is displaced relative to the tube 61A (the first support 31) in conjunction with the operation of the displacement mechanism 50. For this reason, the second support 32 is slidingly displaced relative to the first support 31 in conjunction with the operation of the displacement mechanism 50.

  When the cable 61B is moved such that the distance L3 becomes smaller and the length dimension L2 becomes larger, the leg support as the swing angle θ (see FIG. 4) of the leg support portion 3 becomes larger. Part 3 stretches. When the cable 61B is moved such that the distance L3 is increased and the length dimension L2 is decreased, the leg support 3 is reduced as the rocking angle of the leg support 3 is reduced.

  Therefore, it is possible to abolish the dedicated drive source for sliding the second support 32. As a result, it is possible to obtain the ottoman device 1 capable of reducing the number of drive sources 51B.

  And since the number of drive sources 51 B can be reduced, it is possible to make the control contents simpler than in Patent Document 1 that requires control of a plurality of drive sources. Therefore, it is possible to obtain the ottoman device 1 capable of sliding the second support 32 with a simple configuration.

  A pulley 62 whose rotation center is not displaced regardless of the operating state of the displacement mechanism 50 is provided, and the second coupling portion 61F is coupled to the first support 31 via the pulley 62. As a result, the displacement amount of the cable 61B can be increased without increasing the seat longitudinal dimension of the ottoman device 1.

  That is, since the second connection portion 61F is connected to the first support 31 via the pulley 62, the moving length of the cable 61B is twice the moving length of the first support 31. Therefore, the slide displacement amount of the second support 32 can be increased without causing the ottoman device 1 to be enlarged.

Second Embodiment
In the present embodiment, as shown in FIG. 8, an X link mechanism 70 is used as the displacement mechanism 50. The X link mechanism 70 is a multi-joint link mechanism developed by developing a four-bar link mechanism such as a pantograph.

  The X link mechanism 70 is configured to include a drive arm 71 and a plurality of links 72 to 74 and the like. The drive arm 71 is a drive link that swings by receiving a rotational force from the drive source 51B. The drive arm 71 is coupled to the cushion frame via the mounting bracket 75 with the seat cushion side as a pivot.

  The plurality of links 72 to 74 are members mechanically interlocked with the swing of the drive arm 71. One end of the first link 72 is swingably connected to the first support 31, and the other end is swingably connected to the tip end of the drive arm 71.

  One end of the second link 73 is swingably connected to the first support 31 on the swing center O1 side with respect to the first link 72, and the intermediate portion is connected to the drive arm 71 at the swing center O1 side than the first link 72. It is connected swingably.

  The other end of the second link 73 is swingably connected to one end of the third link 74. The other end side of the third link 74 in the extension direction is swingably connected to the mounting bracket 75 at a position shifted downward from the swing center O1 of the drive arm 71.

  The swing center O1 of the drive arm 71 and the other end side in the extension direction of the third link 74 are connected to the cushion frame via the mounting bracket 75. For this reason, the swing center O1 position of the drive arm 71 and the connection position of the other end side of the third link 74 are stationary with respect to the cushion frame.

  With the above configuration, when the drive arm 71 swings, the first support 31 swings. Therefore, the seat cushion side end of the first support 31, that is, the second tube 61D moves from the position shown in FIG. 9A to the seat front side.

  In the present embodiment, the pulley 62 is not provided. The second connecting portion 61F is provided at a stationary portion regardless of the operating state of the X link mechanism 70 such as the mounting bracket 75 or the like. However, also in the present embodiment, as shown in FIG. 9B, the length dimension L2 from the second connecting portion 61F to the second tube 61D changes in conjunction with the operation of the displacement mechanism 50, that is, the X link mechanism 70. .

  Therefore, also in this embodiment, the control cable 61 operates in the same manner as in the first embodiment. As a result, since it is possible to abolish the dedicated drive source for sliding the second support 32, it is possible to obtain the ottoman device 1 capable of reducing the number of drive sources 51B.

The same components and the like as those of the above-described embodiment are denoted by the same reference numerals as those of the above-described embodiment.
(Other embodiments)
In the above-mentioned embodiment, when reducing the leg support part 3, the elastic force of the spring 63 was utilized. However, the invention disclosed in the present specification is not limited to this.

  That is, for example, a push-pull cable or a geared cable may be employed as the cable 61B. In the case of a push-pull cable or a geared cable, it is possible to slide the second support 32 in conjunction with the displacement of the first support 31 when the swing angle θ of the leg support 3 decreases.

  When a push-pull cable or a geared cable is adopted as the cable 61B, the end of the first tube 61C on the side of the first connecting portion 61E is located on the seat rear side, that is, the seat cushion side with respect to the first connecting portion 61E. It may be done.

  In the above-mentioned embodiment, the 1st tube 61C and the 2nd tube 61D were used as the 1st control part and the 2nd control part. However, the invention disclosed in the present specification is not limited to this.

  That is, for example, the first restricting portion and the second restricting portion may be configured by the terminal fitting metal member of (a) the tube 61A. (B) The tube 61A may be a tube having one flexibility which is continuous from one end to the other end in the longitudinal direction.

In the first embodiment, the pulley 62 is provided, and in the second embodiment, the pulley 62 is not provided. However, the invention disclosed in the present specification is not limited to this.
That is, (a) The configuration in which the pulley 62 is provided in the second embodiment, or the configuration in which the pulley 62 is not provided in the first embodiment may be employed. (B) A plurality of pulleys 62 may be provided. As the number of pulleys 62 increases, the moving length of the cable 61B increases.

  In the above-described embodiment, the second tube 61D forming the second restricting portion is provided at the rear end of the first support 31. However, the invention disclosed in the present specification is not limited to this.

  That is, for example, (a) a configuration in which the second tube 61D is provided on the front side with respect to the first tube 61C, and (b) a substantially U-shaped tube constituting the first tube 61C by eliminating the second tube 61D. The rear end may be configured as the second restricting portion, and (c) the first restricting portion may also function as the second restricting portion.

  In the above-described embodiment, the present invention is applied to a vehicle seat. However, the application of the present invention is not limited to this, and can also be applied to a seat used for vehicles such as rail cars, ships and aircraft.

  Furthermore, the present invention is not limited to the above-described embodiment as long as it conforms to the spirit of the invention described in the claims. Therefore, at least two of the plurality of embodiments described above may be combined.

DESCRIPTION OF SYMBOLS 1 ... Ottoman apparatus 3 ... Leg support part 5 ... Drive apparatus 31 ... 1st support body 32 ... 2nd support body 50 ... Displacement mechanism 51 ... Slider apparatus 51A ... Slider 51B ... Drive source 60 ... Cable mechanism 61 ... Control cable 61A ... Tube 61B ... Cable 61C ... 1st tube 61D ... 2nd tube 62 ... Pulley 63 ... Spring

Claims (4)

In the ottoman device provided on the front end side of the vehicle seat,
A first support to support the legs of the occupant;
A second support for supporting the legs of the occupant, said second support being slidable relative to said first support;
A displacement mechanism that swings and displaces the first support while moving the first support in the seat longitudinal direction;
A cable for sliding the second support, wherein one end of the cable is connected to the second support;
A first restricting portion fixed to the first support at a position forward of the connection portion between the cable and the second support, wherein the cable is displaced in a radial direction of the cable A first restricting portion that restricts and allows the cable to be displaced in the axial direction of the cable;
A second restricting portion fixed to the first support, the second restricting portion restricting displacement of the cable in the radial direction and permitting displacement of the cable in the axial direction Equipped with
The vehicle seat ottoman device, wherein the other end side of the cable is connected to a portion where the length dimension from the other end side to the second restricting portion changes in conjunction with the operation of the displacement mechanism. The displacement mechanism has a slider for swinging the first support body,
The ottoman device for a vehicle seat according to claim 1, wherein the slider is displaced in the longitudinal direction of the seat by obtaining a driving force from a drive source.   The vehicle seat ottoman device according to claim 1, wherein the displacement mechanism is configured to have an X link type link mechanism that operates by obtaining a driving force from a driving source. It has a pulley whose rotation center is not displaced regardless of the operating state of the displacement mechanism,
The ottoman device for a vehicle seat according to any one of claims 1 to 3, wherein the other end side of the cable is connected to the first support via the pulley.