JP2020082794A - Vehicle seat - Google Patents

Abstract

To improve usability of a vehicle seat including an ottoman, and a deployment mechanism and a tip up mechanism of the same, and prevent breakage of the ottoman.SOLUTION: A vehicle seat 1 comprises: a base part 2; a seat cushion 3; an ottoman 6; and a lock mechanism. The seat cushion 3 is installed at the base part 2 to be capable of moving between the seating position and the standing position. The ottoman 6 is installed at the front end part of the seat cushion 3 to be capable of deforming or moving between the stored state and the extended state. The lock mechanism regulates, when the seat cushion 3 is arranged in the standing position and the ottoman 6 is at the stored state, deformation or movement of the ottoman 6 to be the extended state.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a vehicle seat, and more particularly to a vehicle seat installed in a vehicle such as an automobile.

Conventionally, vehicle seats of various configurations have been proposed, and as one of them, a vehicle seat provided with an ottoman is known. The ottoman functions as a leg rest (that is, a leg rest) that supports the legs of an occupant by being attached to the front end of the seat cushion. Normally, the ottoman has a deployment mechanism so that it can be deformed or moved between the stored state and the deployed state, and the ottoman is deformed or moved to the deployed state only when necessary, which causes the leg to move. Used as a rest.

A vehicle seat equipped with this type of ottoman, which is further equipped with a tip-up mechanism that allows the front end of the seat cushion to flip up in order to realize the walk-in function and the cargo room expansion function. There is a sheet. In the vehicle seat, the ottoman is configured to be drawn to the seat cushion side as much as possible so that the outer shape of the seat cushion becomes more compact when the front end portion of the seat cushion is flipped up. Note that, as a document disclosing such a vehicle seat, there is, for example, Japanese Patent Application Laid-Open No. 2013-112128 (Patent Document 1).

JP, 2013-112128, A

However, when the ottoman is deployed while the seat cushion is being flipped up, not only is the ottoman inconvenient because it is an obstacle, but some strong external force acts on the ottoman in the deployed state. The ottoman may be damaged.

Therefore, the present disclosure has been made to solve such a problem, and in a vehicle seat equipped with an ottoman and its deployment mechanism and a tip-up mechanism, the ottoman is not damaged while improving usability. The purpose is to prevent.

A vehicle seat according to an aspect of the present disclosure includes a base portion, a seat cushion, and an ottoman. The base portion is installed on the floor of the vehicle. The seat cushion is provided on the base portion and has a seating surface. The ottoman is provided at the front end of the seat cushion and has a leg rest surface. In the seat cushion, the base portion is provided between a seating position where the seating surface faces upward so that the seat cushion can be seated and a standing position where the seat cushion rises from the seating position by a front end portion of the seat cushion being flipped up. It is possible to move relative to. The ottoman is unfolded so that the tip end portion of the ottoman can be flipped up from the stored state, and the stored state in which the ottoman is stored by being located on the side opposite to the side where the seating surface is located as viewed from the seat cushion. As a result, the seat cushion can be deformed or moved between the seat cushion and the expanded state in which the seat cushion extends from the front end. The leg placement surface is provided so as to face upward when the seat cushion is arranged at the seating position and the ottoman is in the deployed state. In a vehicle seat according to an aspect of the present disclosure, when the seat cushion is arranged in the upright position and the ottoman is in the stored state, the ottoman is deformed or moved to the deployed state. A locking mechanism that regulates is provided.

With this configuration, when the seat cushion is arranged at the upright position and the ottoman is in the stored state, the lock mechanism restricts the deformation and movement of the ottoman to the expanded state. Therefore, the stored state of the ottoman is maintained when the seat cushion is flipped up, the ottoman does not get in the way and the usability is improved, and the ottoman is damaged due to the deployment of the ottoman. Can be prevented in advance.

The vehicle seat according to an aspect of the present disclosure may further include an interlocking mechanism that interlocks with the movement of the seat cushion to change the relative position of the ottoman with respect to the seat cushion. In that case, the interlocking mechanism positions the ottoman at the standby position when the seat cushion is located at the sitting position and the ottoman is in the stored state, and the seat cushion is located at the standing position. When arranged, the ottoman is preferably arranged at the storage position, and the storage position is preferably a position further closer to the seating surface than the standby position. In that case, the lock mechanism prevents the ottoman from being deformed or moved to the deployed state in a state where the ottoman is placed in the storage position by arranging the seat cushion in the standing position. It is preferable to restrict and allow the ottoman to deform or move to the deployed state in a state where the ottoman is placed at the standby position by arranging the seat cushion at the seating position.

With this configuration, when the seat cushion is arranged in the upright position and the ottoman is in the stored state, the ottoman can be pulled closer to the seat cushion side, so that the vehicle seat as a whole is made compact. Can be promoted. Furthermore, the deformation or movement of the seat cushion to the expanded state is restricted by the lock mechanism only when the seat cushion is arranged in the upright position and the ottoman is in the retracted state, further improving usability. Will be planned.

In the vehicle seat according to an aspect of the present disclosure, the base portion may have a base frame that forms the skeleton of the base portion, and the seat cushion forms the skeleton of the seat cushion. It may have a chip-up frame, and the ottoman may have an ottoman frame forming the skeleton of the ottoman. In that case, it is preferable that the tip-up frame is rotatably supported by the base frame about a first rotation shaft extending in the seat width direction, and the ottoman frame is It is preferable that the tip-up frame rotatably supports a second rotation shaft extending along the seat width direction about a rotation center. Further, in that case, it is preferable that the interlocking mechanism is configured by a connecting member that connects the Ottoman frame and the base frame. Further, in that case, the seat cushion is rotated between the seated position and the upright position by rotating the tip-up frame about the first rotation shaft as a rotation center, and the connection is made. Since the Ottoman frame and the base frame are connected by a member, the Ottoman frame rotates about the second rotation axis in association with the rotation of the tip-up frame, It is preferable that the ottoman rotate between the standby position and the storage position.

With this configuration, it is possible to realize the above-described interlocking mechanism with a relatively simple configuration, and it is possible to inexpensively manufacture a vehicle seat that is easy to use and can prevent damage to the ottoman. It will be possible.

The vehicle seat according to an aspect of the present disclosure may further include an operation mechanism for performing an operation of deforming or moving the ottoman from the stored state to the deployed state. In that case, the ottoman is connected to the expansion mechanism that deforms or moves the ottoman to the expanded state and the stored state by expanding or contracting the ottoman frame, and the expansion mechanism by being connected to the operation mechanism. It is preferable to have an input member for inputting the operating force. Further, in that case, the lock mechanism may be configured by a locking portion provided on the tip-up frame, and the locking portion is arranged in the upright position of the seat cushion. It is preferable that the movement of the input member is prevented by abutting the input member in a state where the ottoman is arranged at the storage position.

With this configuration, it is possible to realize the locking mechanism described above with a very simple configuration, and it is possible to inexpensively manufacture a vehicle seat that is easy to use and can prevent damage to the ottoman. It will be possible.

The vehicle seat according to an aspect of the present disclosure may further include a seatback that has a backrest surface and that is provided on the base portion. In that case, the seatback is a backrest position where the backrest surface can face the front, and the upper end portion of the seatback moves downward from the backrest position. Therefore, it is preferable that it can move relative to the base portion between the tilted position and the tilted position. In that case, the seat cushion may be configured to move from the seated position to the standing position in conjunction with the movement of the seat back from the backrest position to the tilted position. preferable.

With this configuration, the seat cushion can be arranged in the upright position in conjunction with the operation of tilting the seat back, which facilitates the compactness of the vehicle seat as a whole and is more convenient. It can be a vehicle seat.

Based on the present disclosure, in a vehicle seat provided with an ottoman, a mechanism for deploying the ottoman, and a tip-up mechanism, it is possible to prevent damage to the ottoman while improving usability.

It is a schematic side view which shows the 1st use state of the vehicle seat which concerns on embodiment. It is a schematic side view which shows the 2nd use state of the vehicle seat which concerns on embodiment. It is a model side view which shows the unused storage state of the vehicle seat which concerns on embodiment. FIG. 3 is a schematic perspective view showing a state of the skeleton structure of the base portion, the seat cushion, and the ottoman in the first use state of the vehicle seat according to the embodiment. It is a schematic perspective view which shows the state of a skeleton structure of the base part, a seat cushion, and an ottoman in the 2nd use state of the vehicle seat which concerns on embodiment. It is a schematic side view which shows the position of the tip-up frame and the ottoman frame in the 1st use state of the vehicle seat which concerns on embodiment. FIG. 4 is a schematic side view showing the positions of the tip-up frame and the ottoman frame in the unused storage state of the vehicle seat according to the embodiment. It is a schematic diagram for demonstrating the structure and function of the lock mechanism of the vehicle seat which concerns on embodiment.

Hereinafter, embodiments will be described in detail with reference to the drawings. The following embodiments exemplify a case where the present invention is applied to a vehicle seat configured as a vehicle seat. In the embodiments described below, the same or common parts are designated by the same reference numerals in the drawings, and the description thereof will not be repeated.

In each figure, as viewed from an occupant seated on a vehicle seat, the seat front direction and the seat rear direction are indicated by the X1 direction and the X2 direction, respectively, and the seat left direction and the seat right direction are indicated by the Y1 direction and the Y2 direction, respectively. The seat upper direction and the seat lower direction are indicated by Z1 direction and Z2 direction, respectively. In the following description, an axis that matches the seat front direction X1 and the seat rear direction X2 is referred to as an X axis, an axis that matches the seat left direction Y1 and a seat right direction Y2 is referred to as a Y axis, and a seat upward direction Z1 and a seat downward direction are used. The axis that matches the direction Z2 is called the Z axis. The sheet width direction matches the Y-axis extending direction.

1 to 3 are schematic side views showing a first use state, a second use state and an unused storage state of a vehicle seat according to an embodiment, respectively. First, the schematic configuration of the vehicle seat 1 according to the present embodiment and various states described above will be described with reference to FIGS. 1 to 3.

As shown in FIGS. 1 to 3, a vehicle seat 1 is installed on a floor 100 of a vehicle, and includes a base portion 2, a seat cushion 3, a seat back 4, a headrest 5, and an ottoman 6. It is mainly equipped with.

The seat cushion 3 and the seat back 4 are provided on a base portion 2 which is a base of the vehicle seat 1. More specifically, the seat cushion 3 is arranged above the portion excluding the rear end portion of the base portion 2, and the seat back 4 is erected upward from the rear end portion of the base portion 2. .. On the other hand, the headrest 5 is provided at the upper end of the seat back 4, and the ottoman 6 is provided at the front end of the seat cushion 3.

The first usage state shown in FIG. 1 is a usage mode in which an occupant sits on the vehicle seat 1 without using the ottoman 6. In the first use state, the seat cushion 3 is arranged at a seating position described in detail below, and the seat back 4 is arranged in a backrest position described in detail below. Further, the ottoman 6 is in a stored state which will be described later in detail, and particularly in the first use state, the ottoman 6 is arranged at a standby position which will be described later in detail.

The second usage state shown in FIG. 2 is a usage mode in which an occupant sits on the vehicle seat 1 while using the ottoman 6. In the second use state, the seat cushion 3 is arranged in the sitting position as in the first use state, and the seat back 4 is arranged in the backrest position as in the first use state. There is. The ottoman 6 is in a developed state, which will be described in detail later.

The unused storage state shown in FIG. 3 is a mode in which the vehicle seat 1 is folded in order to exert the walk-in function and the cargo room expanding function. In the unused storage state, it becomes impossible for the occupant to sit on the seat, but the outer shape of the vehicle seat 1 can be made significantly compact. In the unused storage state, the seat cushion 3 is arranged in a standing position which will be described later in detail, and the seat back 4 is arranged in a tilted position which will be described later in detail. Further, although the ottoman 6 is in the stored state as in the case of the first use state, particularly in the unused storage state, the ottoman 6 is arranged in the storage position described in detail later.

Switching between the first use state, the second use state, and the unused storage state is performed by an operation unit (operation lever, operation button, etc.) not shown, or the seat cushion 3 and the seat back 4 while operating the operation unit. , Ottoman 6 is pushed in a predetermined direction, and the like.

Here, in the vehicle seat 1 according to the present embodiment, in the above-described first use state in which the seat cushion 3 is arranged at the seating position and the ottoman 6 is in the stored state, the ottoman 6 is in the expanded state. While it is configured to be deformable, it is impossible for the ottoman 6 to be deformed to the expanded state in the above-described unused storage state in which the seat cushion 3 is arranged in the upright position and the ottoman 6 is in the stored state. It is configured.

With such a configuration, the stored state of the ottoman 6 is maintained in the state where the seat cushion 3 is flipped up, so that the ottoman 6 is not disturbed and the usability is improved, and the ottoman 6 is It is possible to prevent damage to the ottoman 6 due to the expansion.

In the vehicle seat 1 according to the present embodiment, as described above, the lock function is exerted only in the unused storage state so that the ottoman 6 cannot be deployed only in the unused storage state. Although a mechanism will be provided, details of the lock mechanism will be described later.

As shown in FIGS. 1 to 3, the base portion 2 includes a base frame 20 that forms the skeleton of the base portion 2 and a slide rail 21. The slide rail 21 is fixed to the floor 100 of the vehicle, and the base frame 20 is supported by the slide rail 21 so as to be movable along the X-axis direction. As a result, the entire vehicle seat 1 excluding the slide rail 21 can be moved in the seat front-rear direction by operating an operation unit (not shown).

The seat cushion 3 has a seating surface 3a on which an occupant can sit, and is arranged above the portion excluding the rear end portion of the base portion 2 as described above. The seat cushion 3 mainly has a chip-up frame 30 that forms the skeleton of the seat cushion 3, a cushion pad that covers the chip-up frame 30, and a cushion cover that covers the cushion pad and defines the seating surface 3a described above. ing.

The seat cushion 3 is movably supported by the base portion 2. Specifically, the tip-up frame 30 is rotatable about the first rotation axis O1 extending along the seat width direction as a rotation center along the arrow AR1 direction shown in FIG. Supported by 20. As a result, the seat cushion 3 is configured to be movable relative to the base portion 2 between the sitting position shown in FIGS. 1 and 2 and the standing position shown in FIG.

The seat back 4 has a backrest surface 4a on which an occupant can rest, and is erected upward from the rear end of the base portion 2 as described above. The seat back 4 mainly has a back frame (not shown) that forms the skeleton of the seat back 4, a back pad that covers the back frame, and a back cover that defines the backrest surface 4a by covering the pack pad. There is.

The seat back 4 is movably supported by the base portion 2. Specifically, the back frame is rotated by the base frame 20 so as to be rotatable about the third rotation axis O3 extending along the seat width direction along the arrow AR3 direction shown in FIG. It is supported. As a result, the seat back 4 is configured to be movable relative to the base portion 2 between the backrest position shown in FIGS. 1 and 2 and the tilted position shown in FIG.

Here, a recliner 7 is provided at a connecting portion between the base frame 20 and the back frame. By connecting the base frame 20 and the back frame via the recliner 7, the back frame is configured so that the relative angle with respect to the base frame 20 can be adjusted. As a result, the backrest angle of the seat back 4 can be adjusted by operating an operation unit (not shown).

The headrest 5 is provided at the upper end of the seatback 4 as described above, and mainly includes a headrest frame (not shown), a headrest pad that covers the headrest frame, and a headrest cover that covers the headrest pad. The headrest 5 is a portion to which the head of an occupant seated on the vehicle seat 1 is addressed.

The ottoman 6 has a leg rest surface 6a on which the legs (especially calves) of the occupant can be placed, and is provided at the front end portion of the seat cushion 3 as described above. The ottoman 6 mainly includes an ottoman frame 60 that forms the skeleton of the ottoman 6, an ottoman pad that covers the ottoman frame 60, and an ottoman cover that defines the leg placing surface 6a by covering the ottoman pad.

The ottoman 6 is movably supported by the seat cushion 3. Specifically, the ottoman frame 60 is rotatable about the second rotation axis O2 extending along the seat width direction as a rotation center along the arrow AR2 direction shown in FIG. Supported by 30. As a result, the ottoman frame 60 is configured to be movable relative to the seat cushion 3 between the standby position shown in FIG. 1 and the storage position shown in FIG.

Furthermore, the ottoman frame 60 has a deployment mechanism 62 (see FIGS. 4 and 5 and the like) described later, and is configured to be expandable and contractable with a reference axis O4 shown in the drawings as a base point. With the expansion and contraction of the expansion mechanism 62, the ottoman 6 is configured to be deformable between the stored state shown in FIGS. 1 and 3 and the expanded state shown in FIG. At that time, the ottoman 6 is deformed so that the leg rest surface 6a moves along the arrow AR4 direction shown in FIG.

Here, the unfolding mechanism 62 is provided with an angle adjusting mechanism 68 (see FIGS. 4 and 5 and the like) described later. The angle adjusting mechanism 68 has a configuration similar to that of the recliner 7 described above, and by providing the angle adjusting mechanism 68, the relative angle of the leg rest surface 6a of the ottoman 6 with respect to the tip-up frame 30 is changed. It is configured to be adjustable. As a result, the angle of the leg rest surface 6a of the ottoman 6 can be adjusted by operating an operation unit (not shown).

4 and 5 are schematic perspective views showing the skeleton structure of the base portion, the seat cushion, and the ottoman of the vehicle seat according to the present embodiment. Here, FIG. 4 shows the skeleton structure in the above-mentioned first use state, and FIG. 5 shows the skeleton structure in the above-mentioned second use state. Further, FIG. 6 is a schematic side view showing the positions of the tip-up frame and the ottoman frame in the first use state of the vehicle seat according to the present embodiment, and FIG. 7 is the tip-up frame in the unused storage state. It is a schematic side view which shows the position of an Ottoman frame. Next, referring to these FIG. 4 to FIG. 7, the skeleton structure of the base portion 2, the seat cushion 3 and the ottoman 6 of the vehicle seat 1 according to the present embodiment will be described, and the above-mentioned first use state, These positions in the second usage state and the unused storage state will be described in detail. 4 to 7, part of each of the base frame 20, the chip-up frame 30, and the ottoman frame 60 is omitted for easy understanding.

As shown in FIGS. 4 to 7, the base frame 20 has a frame shape in a plan view, and includes side frames 20L and 20R that are a pair of left and right frames, and a front pipe 20F and a rear pipe that are a pair of front and rear frames. 20B and.

The side frames 20L and 20R are each formed of a press-formed product obtained by pressing a metal plate such as a steel plate, and are arranged so as to extend along the seat front-rear direction (that is, the X-axis direction). The front pipe 20F and the rear pipe 20B are each formed of a metal cylindrical member such as a steel pipe, and are arranged so as to extend along the seat width direction (that is, the Y-axis direction). The front pipe 20F connects the front ends of the side frames 20L and 20R, and the rear pipe 20B connects the rear ends of the side frames 20L and 20R.

The chip-up frame 30 has a frame-like shape in a plan view, and has side frames 30L and 30R that are a pair of left and right frames, and a front panel 30F and a rear pipe 30B that are a pair of front and rear frames.

The side frames 30L and 30R are each formed of a press-formed product obtained by pressing a metal plate such as a steel plate, and are arranged so as to extend substantially along the seat front-rear direction (that is, the X-axis direction). The front panel 30F is composed of a press-formed product obtained by pressing a metal plate such as a steel plate, and is arranged so as to extend along the sheet width direction (that is, the Y-axis direction). The rear pipe 30B is made of, for example, a metal cylindrical member such as a steel pipe, and is arranged so as to extend along the seat width direction (that is, the Y-axis direction). The front panel 30F connects the front ends of the side frames 30L and 30R, and the rear pipe 30B connects the rear ends of the side frames 30L and 30R.

The rear end portions of the side frames 30L and 30R of the tip-up frame 30 are rotatably supported by the side frames 20L and 20R of the base frame 20, respectively, and the connecting portion between the tip-up frame 30 and the base frame 20. Bias springs 31L and 31R are provided in the. As a result, the above-described first rotation axis O1 extends along the seat width direction at the portion where the tip-up frame 30 is rotatably supported. The urging springs 31L and 31R are, for example, spiral springs.

Here, the tip-up frame 30 is urged in the direction in which it is flipped up by the urging springs 31L and 31R (that is, the direction in which the front end of the tip-up frame 30 approaches the seat back 4). Further, the tip-up frame 30 is configured such that its rotation is restricted by a lock portion (not shown) against the biasing force of the biasing springs 31L and 31R. Thus, the seat cushion 3 is flipped up by rotating the tip-up frame 30 when the lock by the lock portion is released by operating the operation portion as described above.

A connection bracket 32 is provided on the front panel 30F that constitutes the front end of the chip-up frame 30. The connection bracket 32 is a part to which the ottoman 6 is assembled, and is composed of a press-formed product obtained by pressing a metal plate such as a steel plate. The connection bracket 32 is located so as to project obliquely downward and forward from the lower surface of the front panel 30F.

The ottoman frame 60 mainly includes a pair of left and right fixing brackets 61L and 61R, and a deployment mechanism 62 assembled to the fixing brackets 61L and 61R. Here, the expansion mechanism 62 is rotatably supported by the fixing brackets 61L and 61R, and the above-described second rotating shaft O2 has a seat width direction in the portion where the expansion mechanism 62 is rotatably supported. Extends along.

The fixing brackets 61L and 61R are arranged so as to face each other in the seat width direction (that is, the Y-axis direction), and each has a plate shape. The fixing brackets 61L and 61R are fixed to the connection bracket 32 described above. The fixing brackets 61L and 61R are each formed by a press-molded product obtained by pressing a metal plate such as a steel plate.

The expansion mechanism 62 deforms the ottoman 6 between the expanded state and the stored state by expanding and contracting with the reference axis O4 described above as a base point. That is, the ottoman 6 takes the stored state as shown in FIG. 4 by contraction of the expansion mechanism 62, and takes the expanded state as shown in FIG. 5 by extension of the expansion mechanism 62. Become.

The expansion mechanism 62 is composed of a cross-link mechanism having a so-called pantograph structure, and includes a pair of left and right links 63L and 63R configured by a plurality of plates and a plurality of hinges, and a pair of upper and lower pipes 64U and 64D connecting the links 63L and 63R. And a pair of upper and lower wires 65U and 65D, a pair of left and right biasing springs 66L and 66R stretched over the wires 65U and 65D, and links 63L and 63R, and a base of the footrest surface 6a of the ottoman 6 is connected. It mainly has a pair of upper and lower pedestal parts 67U and 67D which constitute it.

The plurality of plates constituting the links 63L, 63R and the pedestal portions 67U, 67D are each formed by a press-molded product obtained by pressing a metal plate such as a steel plate, and the pipes 64U, 64D are each formed of a metal such as a steel pipe. It is composed of a cylindrical member. The wires 65U and 65D are made of metal linear members, and the biasing springs 66L and 66R are made of coil springs, for example.

Base plates 63La and 63Ra that are rotatably assembled to the fixing brackets 61L and 61R and the base links 63La and 63Ra are respectively attached to the plurality of plates that form the pair of left and right links 63L and 63R. It includes main links 63Lb and 63Rb that are movably assembled. Here, the angle adjusting mechanism 68 described above is provided between the base links 63La and 63Ra and the main links 63Lb and 63Rb.

The base links 63La and 63Ra located on one end side in the expansion/contraction direction of the expansion mechanism 62 are supported by the fixing brackets 61L and 61R, respectively, and the link 63L of the portion located on the other end side in the expansion/contraction direction of the expansion mechanism 62, 63R is being fixed to the base parts 67U and 67D, respectively. As a result, the links 63L and 63R connect the fixing brackets 61L and 61R and the pedestal portions 67U and 67D so that they can expand and contract, and the ottoman 6 is deformed as the links 63L and 63R expand and contract.

More specifically, in the unfolding mechanism 62, the base links 63La and 63Ra and the pedestal portions 67D and 67U are urged by the urging springs 66L and 66R in the direction of approaching each other. Further, as described above, the angle adjusting mechanism 68 is provided between the base links 63La and 63Ra and the main links 63Lb and 63Rb. The angle adjustment mechanism 68 is provided with an input lever 68a as an input member, and the input lever 68a is connected with a traction cable 70 as an operation mechanism connected to an operation unit (not shown). The input lever 68a and the traction cable 70 are for inputting an operating force generated by operating an operating unit (not shown) to the angle adjusting mechanism 68. Note that the traction cable 70 is actually routed by a predetermined length so as to reach the operation portion, but in FIG. 4 to FIG. 7 (the same applies to FIG. 8 described later), its input Only the end on the lever 68a side is shown.

As a result, an operating force generated by operating an operating portion (not shown) is input to the angle adjusting mechanism 68 via the input lever 68a, so that the expanding mechanism 62 resists the urging force of the urging springs 66L and 66R. And then stretched. As a result, the ottoman 6 can be transformed from the stored state to the deployed state. The deformation of the ottoman 6 from the expanded state to the stored state is realized by contracting the expansion mechanism 62 by the urging force of the urging springs 66L and 66R.

Here, when the expansion mechanism 62 is deformed from the stored state to the expanded state, the ottoman 6 is deformed so that the tip end portion of the ottoman 6 (that is, the distal end viewed from the reference axis O4) is flipped up (FIG. (See arrow AR4 shown in 1). As a result, when the seat cushion 3 is arranged at the seating position and the ottoman 6 is in the unfolded state, the ottoman 6 is in a state of overhanging from the front end portion of the seat cushion 3, and accordingly, the leg placing surface 6a is moved upward. Will turn. Therefore, the second use state using the ottoman 6 can be realized.

The angle adjusting mechanism 68 is provided with a holding mechanism for lightly holding the unfolded state of the unfolding mechanism 62, whereby the main links 63Lb, 63Rb with respect to the base links 63La, 63Ra are based on the operation amount of the operation unit (not shown). The angle of can be adjusted. Therefore, the degree of expansion and contraction of the expansion mechanism 62 can be adjusted by the angle adjustment mechanism 68, and as a result, the angle of the leg rest surface 6a of the ottoman 6 can be adjusted.

Here, in the vehicle seat 1 according to the present embodiment, a projecting piece-shaped locking portion 33 is provided at a predetermined position on the front panel 30F of the chip-up frame 30. As will be described later in detail, the locking portion 33 is a lock mechanism that restricts the deformation of the ottoman 6 to the expanded state when the seat cushion 3 is arranged in the upright position and the ottoman 6 is in the stored state. It functions as.

On the other hand, as shown in FIGS. 6 and 7, the Ottoman frame 60 is connected to the base frame 20 via a connecting member 80 extending in a rod shape as an interlocking mechanism described later. More specifically, one end of the connecting member 80 is connected to the front pipe 20F of the base frame 20 so as to be rotatable about the first connecting shaft O5 shown in the drawing, and the other end is the second pipe shown in the drawing. It is fixed to a fixing bracket 61R (see FIGS. 4 and 5) of the Ottoman frame 60 so as to be rotatable around the connecting shaft O6 as a rotation center. The connecting member 80 rotates the Ottoman frame 60 about the second rotation axis O2 in association with the rotation of the tip-up frame 30 about the first rotation axis O1.

By including the skeleton structure described above, the vehicle seat 1 according to the present embodiment is configured to be switchable to the above-described first use state, second use state, and unused storage state. It will be.

Here, referring to FIGS. 1, 2, and 4 to 6, in the first use state and the second use state, seat cushion 3 is arranged at the seating position as described above. The seating position is a position at which the occupant can sit down when the seating surface 3a provided on the seat cushion 3 faces upward.

On the other hand, referring to FIGS. 3 and 7, in the unused storage state, seat cushion 3 is arranged in the upright position as described above. The upright position is a position in which the seat cushion 3 is in an upright state when the front end portion of the seat cushion 3 is flipped up from the sitting position described above.

That is, in the vehicle seat 1 according to the present embodiment, the seat cushion 3 has a seating position where the seating surface 3a faces upward, and a seating position from which the seat cushion 3 can be seated. It is configured such that it can move relative to the base portion 2 between an upright position in which the portion rises up and is raised. The movement of the seat cushion 3 is realized by rotating the tip-up frame 30 about the first rotation axis O1 by operating an operation unit (not shown).

Further, referring to FIGS. 1, 2, and 4 to 6, in the first use state and the second use state, seat back 4 is arranged at the backrest position as described above. The backrest position is a position at which the occupant can rest on his back by having the backrest surface 4a provided on the seatback 4 face forward.

On the other hand, referring to FIGS. 3 and 7, in the unused storage state, seat back 4 is arranged in the tilted position as described above. The tilted position is a position in which the seatback 4 is tilted by moving the upper end of the seatback 4 downward and downward from the backrest position.

That is, in the vehicle seat 1 according to the present embodiment, the seat back 4 has a backrest position where the backrest surface 4a faces forward, and a seatback position from which the seatback 4 can be backrested. It is configured such that the upper end of the back 4 can move relative to the base 2 between the tilted position in which the upper end of the back 4 moves downward and tilts. The movement of the seat back 4 is realized by rotating a back frame (not shown) about the third rotation axis O3 by operating an operation unit (not shown).

In the vehicle seat 1 according to the present embodiment, by adopting a known method, the seat cushion 3 interlocks with the movement of the seat back 4 from the backrest position to the tilted position, and the seated position. Is preferably configured to move from to the standing position. According to this structure, the vehicle seat 1 can be immediately changed from the first use state to the unused storage state, and the usability can be improved.

Further, referring to FIGS. 1, 3, 4, 6, and 7, in the first use state and the non-use storage state, ottoman 6 is stored as described above. The housed state is a state in which the ottoman 6 is housed when the ottoman 6 is located on the side opposite to the side where the seating surface 3a of the seat cushion 3 is located when viewed from the seat cushion 3.

On the other hand, referring to FIGS. 2 and 5, in the second use state, ottoman 6 is in the expanded state as described above. The unfolded state is a state in which the ottoman 6 projects from the front end portion of the seat cushion 3 by unfolding the ottoman 6 so that the tip portion of the ottoman 6 is flipped up from the stored state.

That is, in the vehicle seat 1 according to the present embodiment, a storage state in which the ottoman 6 is stored by being located on the side opposite to the side on which the seating surface is located when viewed from the seat cushion 3, By expanding the ottoman 6 so that the tip end portion of the ottoman 6 is flipped up from the stored state, the ottoman 6 can be deformed between the seat cushion 3 and the expanded state in which the ottoman 6 extends from the front end portion. The deformation of the ottoman 6 is realized by the expansion mechanism 62 of the ottoman 6 expanding and contracting with the reference axis O4 as a reference point by operating an operation unit (not shown) or the like.

In addition, referring to FIGS. 1, 4 and 6, in the first use state in which seat cushion 3 is arranged at the seating position and ottoman 6 is in the stored state, ottoman 6 is deployed by deployment mechanism 62. It is placed in the standby position where it is possible. The standby position is farther from the seating surface 3a of the seat cushion 3 than the storage position described later.

On the other hand, referring to FIG. 3 and FIG. 7, in the unused storage state in which seat cushion 3 is placed in the upright position and ottoman 6 is in the stored state, ottoman 6 is stored in a state in which it cannot be expanded by expansion mechanism 62. Placed in position. The storage position is closer to the seating surface 3a of the seat cushion 3 than the standby position described above.

The change in the relative position of the ottoman 6 with respect to the seat cushion 3 is such that the ottoman frame 60 is rotatably supported by the tip-up frame 30, and at the same time, the ottoman frame 60 is interlocked with the base frame 20 as described above. It is because it is connected by the connecting member 80.

More specifically, referring to FIGS. 6 and 7, in vehicle seat 1 according to the present embodiment, rotation of first rotation axis O1 that is the rotation center of tip-up frame 30 and rotation of ottoman frame 60. The distance from the second rotation axis O2, which is the center (that is, the radius of rotation of the second rotation axis O2 around the first rotation axis O1), and the distance provided to the end of the connecting member 80 on the base frame 20 side. The distance between the first connecting shaft O5 and the second connecting shaft O6 provided at the end of the connecting member 80 on the Ottoman frame 60 side (that is, the radius of gyration of the second connecting shaft O6 around the first connecting shaft O5); , The position where each of the first rotary shaft O1, the second rotary shaft O2, the first connecting shaft O5, and the second connecting shaft O6 is provided is appropriately set so as to mutually satisfy a predetermined condition. ..

As a result, when the tip-up frame 30 rotates about the first rotation axis O1, the seat cushion 3 rotates between the sitting position and the upright position, and the tip-up frame 30 rotates. When the ottoman frame 60 is rotated about the second rotation axis O2 as the rotation center in conjunction with each other, the ottoman 6 is rotated between the standby position and the storage position.

That is, in the vehicle seat 1 according to the present embodiment, when the seat cushion 3 is arranged at the sitting position and the ottoman 6 is in the stored state, the ottoman 6 is arranged at the standby position and the seat is formed. When the cushion 3 is placed in the standing position, the ottoman 6 is placed in the storage position. As a result, when the seat cushion 3 is arranged in the upright position and the ottoman 6 is in the stored state, the ottoman 6 can be pulled closer to the seat cushion 3 side, so that the vehicle seat 1 as a whole is made compact. Can be promoted.

FIG. 8 is a schematic diagram for explaining the configuration and function of the vehicle seat locking mechanism according to the present embodiment. Here, FIG. 8A is a diagram corresponding to the first use state shown in FIG. 6, and FIG. 8B is a diagram corresponding to the unused storage state shown in FIG. 7. Next, with reference to FIGS. 8A and 8B, the configuration and function of the lock mechanism included in the vehicle seat 1 according to the present embodiment will be described in detail.

8(A) and 8(B), for the sake of easy understanding, only the essential parts are extracted from the configuration shown in FIGS. 6 and 7. .. Further, in order to facilitate understanding of the relative position change of the Ottoman frame 60 with respect to the chip-up frame 30, the arrangement direction of the X axis and the Y axis in FIG. 8B is the X direction in FIG. 8A. It is different from the arrangement direction of the axis and the Y axis.

As described above with reference to FIGS. 8A and 8B, in the vehicle seat 1 according to the present embodiment, the locking portion 33 as the locking mechanism is provided on the chip-up frame 30. It is provided. The locking portion 33 is arranged so as to project from the tip-up frame 30 toward the Ottoman frame 60 side by a predetermined amount. The locking portion 33 is composed of a press-formed product obtained by pressing a metal plate such as a steel plate, and is fixed to a predetermined position of the chip-up frame 30 by welding, fastening, or the like. The locking portion 33 may be provided integrally with the chip-up frame 30.

On the other hand, the angle adjusting mechanism 68 provided in the expansion mechanism 62 of the Ottoman frame 60 has the input lever 68a as described above. The input lever 68a is arranged such that an arm portion that rotates by being connected with a pulling cable 70 as an operating mechanism protrudes toward the tip-up frame 30 side by a predetermined amount. The input lever 68a is composed of a press-formed product obtained by pressing a metal plate such as a steel plate.

Here, the second rotation axis O2, which is the rotation center of the Ottoman frame 60, is provided at a position higher than the input lever 68a. Further, the input lever 68a is configured to extend the expansion mechanism 62 by being pulled by the pulling cable 70 in the direction away from the second rotation axis O2.

As shown in FIG. 8(A), in the first use state in which the seat cushion 3 is arranged at the seating position and the ottoman 6 is in the stored state, the ottoman 6 is arranged at the standby position, so that the locking portion. 33 is not arranged at the position on the rotation locus of the input lever 68a. That is, in the first use state, the ottoman 6 is not pulled toward the seat cushion 3 side by the above-described connecting member 80, so that the locking portion 33 and the input lever 68a are set to the predetermined position in the rotation direction of the ottoman 6. They are separated by a distance.

Therefore, in the first use state, when the input lever 68a is pulled by the traction cable 70, the movement of the input lever 68a is not blocked by the locking portion 33, so that the expansion mechanism 62 expands. The ottoman 6 can be transformed from the stored state to the deployed state. That is, in this case, the locking portion 33 as the lock mechanism allows the ottoman 6 to be deformed from the housed state to the deployed state.

On the other hand, as shown in FIG. 8B, in the unused storage state in which the seat cushion 3 is placed in the standing position and the ottoman 6 is in the stored state, the ottoman 6 is placed in the stored position, and The stopper 33 is arranged at a position on the rotation locus of the input lever 68a. That is, in the unused storage state, since the ottoman 6 is pulled to the seat cushion 3 side by the connecting member 80 described above, the locking portion 33 and the input lever 68a overlap in the rotation direction of the ottoman 6. Is in a state.

Therefore, in the unused storage state, when the input lever 68a is pulled by the traction cable 70, the input lever 68a comes into contact with the locking portion 33 to prevent the movement thereof. It becomes impossible for 62 to extend, which makes it impossible for the ottoman 6 to deform from the stored state to the deployed state. That is, in this case, the locking portion 33 as the lock mechanism restricts the deformation of the ottoman 6 from the housed state to the deployed state.

8A and 8B, a virtual line 1000 connecting the second rotation shaft O2 and the predetermined position of the input lever 68a is indicated by a solid line in order to facilitate understanding of the above points. In addition to the notation, in FIG. 8B, a virtual line 1001 indicating the position corresponding to the position of the virtual line 1000 in FIG. That is, by operating the ottoman frame 60 in association with the movement of the tip-up frame 30 by the amount of the arrow DR shown in FIG. Will be disabled at.

With this configuration, the ottoman 6 cannot be deformed to the expanded state only when the seat cushion 3 is arranged in the upright position and the ottoman 6 is in the stored state. Therefore, the housed state of the ottoman 6 is maintained in the state where the seat cushion 3 is flipped up, the ottoman 6 is not disturbed and the usability is improved, and the ottoman 6 is unfolded. The occurrence of breakage of 6 can be prevented in advance.

Further, since the lock mechanism and the interlocking mechanism having the above-described configurations can be realized with a simple configuration, the lock mechanism and the interlocking mechanism are easy to use and the ottoman 6 can be prevented from being damaged. It also becomes possible to manufacture vehicle seats at low cost.

In the above-described embodiment, the lock mechanism prevents movement of the operation mechanism for deforming the ottoman from the stored state to the deployed state, and thus the deformation of the ottoman is restricted. Although the description has been given, the lock mechanism does not necessarily have to be configured in this way, and the lock mechanism that prevents the deformation of the ottoman frame itself may be configured to restrict the deformation of the ottoman.

Further, in the above-described embodiment, the case where the ottoman is configured to be deformable between the stored state and the deployed state by expanding and contracting the ottoman frame has been described as an example. It is not necessary to configure in this manner, and the ottoman frame may be configured to move (for example, rotate) so that the ottoman can move between the stored state and the deployed state.

Further, in the above-described embodiment, the case where the present invention is applied to the vehicle seat configured as the seat of the automobile has been described as an example, but the present invention is installed in a ship, an aircraft, a train, or the like. The present invention can be applied to any vehicle seat such as a closed seat.

As described above, the above-described embodiments disclosed this time are exemplifications in all respects, and are not restrictive. The technical scope of the present invention is defined by the claims, and includes the meaning equivalent to the description of the claims and all modifications within the scope.

1 vehicle seat, 2 base part, 3 seat cushion, 3a seating surface, 4 seat back, 4a backrest surface, 5 headrest, 6 ottoman, 6a leg rest surface, 7 recliner, 20 base frame, 20B rear pipe, 20F front pipe, 20L, 20R side frame, 21 slide rail, 30 tip-up frame, 30B rear pipe, 30F front panel, 30L, 30R side frame, 31L, 31R biasing spring, 32 connection bracket, 33 locking part, 60 Ottoman frame, 61L, 61R fixing bracket, 62 unfolding mechanism, 63L, 63R link, 63La, 63Ra base link, 63Lb, 63Rb main link, 64D, 64U pipe, 65D, 65U wire, 66L, 66R biasing spring, 67D, 67U pedestal part, 68 Angle adjusting mechanism, 68a input lever, 70 traction cable, 80 connecting member, 100 floor, O1 first rotating shaft, O2 second rotating shaft, O3 third rotating shaft, O4 reference shaft, O5 first connecting shaft, O6 second Connecting shaft.

Claims (5)

Base part installed on the floor of the vehicle,
A seat cushion having a seating surface and provided on the base portion;
An ottoman provided with a leg rest surface and provided at a front end portion of the seat cushion,
In the seat cushion, the base portion is provided between a seating position where the seating surface faces upward so that the seat cushion can be seated and a standing position where the seat cushion rises up from the seating position by a front end portion of the seat cushion. It is possible to move relative to
The ottoman is unfolded such that the ottoman is stowed when the seat cushion is located on the side opposite to the seating surface when viewed from the seat cushion, and the tip of the ottoman is flipped up from the stowed state. By doing so, it is possible to deform or move between the seat cushion and the deployed state in which it projects from the front end portion,
The leg placement surface is provided so as to face upward when the seat cushion is arranged at the seating position and the ottoman is in the deployed state,
A vehicle seat provided with a lock mechanism for restricting deformation or movement of the ottoman to the expanded state when the seat cushion is arranged in the upright position and the ottoman is in the stored state. Further comprising an interlocking mechanism that changes a relative position of the ottoman with respect to the seat cushion in conjunction with movement of the seat cushion,
In the case where the seat cushion is arranged in the seating position and the ottoman is arranged in the standby position when the seat cushion is in the stored state, and the seat cushion is arranged in the standing position. Place the ottoman in the storage position,
The storage position is a position closer to the seating surface than the standby position,
The lock mechanism restricts the Ottoman from being deformed or moved to the expanded state in a state where the ottoman is placed in the storage position by arranging the seat cushion in the standing position, and the seat cushion is also provided. The vehicle seat according to claim 1, wherein the seating position allows the ottoman to deform or move to the deployed state when the ottoman is located at the standby position. The base portion has a base frame that forms the skeleton of the base portion,
The seat cushion has a chip-up frame that forms the skeleton of the seat cushion,
The ottoman has an ottoman frame forming the skeleton of the ottoman,
The tip-up frame is supported by the base frame so as to be rotatable around a first rotation shaft extending along the seat width direction as a rotation center.
The ottoman frame is supported by the tip-up frame so as to be rotatable about a second rotation axis extending along the seat width direction,
The interlocking mechanism has a connecting member that connects the Ottoman frame and the base frame,
When the tip-up frame rotates about the first rotation shaft as a rotation center, the seat cushion rotates between the sitting position and the upright position, and the connecting member causes the ottoman frame and the ottoman frame to rotate. When the ottoman frame rotates about the second rotation shaft in conjunction with the rotation of the tip-up frame as the base frame is connected, the ottoman moves to the standby position. The vehicle seat according to claim 2, wherein the vehicle seat rotates with respect to the storage position. Further comprising an operation mechanism for performing an operation of transforming or moving the ottoman from the stored state to the deployed state,
The ottoman inputs an operating force to the deploying mechanism by being connected to the deploying mechanism that transforms or moves the ottoman into the deploying state and the stored state by expanding or contracting the ottoman frame, and the deploying mechanism. And an input member for
The lock mechanism has a locking portion provided on the tip-up frame,
The locking portion prevents movement of the input member by contacting the input member in a state in which the ottoman is placed in the storage position when the seat cushion is placed in the standing position. Item 5. The vehicle seat according to item 3. Having a backrest surface, further comprising a seat back provided on the base portion,
The seat back is a backrest position where the backrest surface faces the front so that the seatback can be backrested, and the top end of the seatback moves downward from the backrest position to tilt forward. Is movable relative to the base with respect to a position,
5. The seat cushion is configured to move from the seated position to the upright position in conjunction with the movement of the seat back from the backrest position to the tilted position. The vehicle seat described in.

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