JP2012144091A - Stowable rear seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smooth accommodation operation of a seat cushion.SOLUTION: A seat cushion part of a stowable rear seat includes: a seat cushion body that is horizontally disposed to a floor surface forward of a seat back body, and is freely housed in the underfoot floor surface that is one step lower than the floor surface; and a switching mechanism that switches the horizontal state in the floor surface of the seat cushion body and the accommodation condition in the underfoot floor surface. The switching mechanism includes: a lateral pair of legs that are installed turnably to each of the seat cushion body and the underfoot floor surface, and support the seat cushion body to guide between the horizontal state in the floor surface and the accommodation condition in underfoot floor surface by turning to the underfoot floor surface back and forth; and a connection frame bridged between the pair of legs. The connection frame is formed to the shape that curves as becoming a convex aiming at forward when the seat cushion body is in the horizontal state in the floor surface.

Description

  The present invention relates to a retractable rear seat.

  Conventionally, some rear seats of a vehicle are provided with a retractable rear seat so that the rear seat space can be expanded when no occupant is present (see, for example, Patent Document 1). The retractable rear seat is provided with a seat cushion and a seat back. In the seatable state, the seat cushion is disposed substantially horizontally with respect to the floor surface, and the seat back is standing up at the rear portion of the seat cushion. In the retracted state, the seat cushion is disposed substantially horizontally on the foot floor below the floor and the seat back is folded and disposed substantially horizontally with respect to the floor. When transitioning from the seatable state to the retracted state, the user releases the seat cushion lock and the seat back lock, and then moves the seat cushion to the floor of the foot and moves the seat back. It is designed to tilt.

Japanese Patent Laid-Open No. 9-30303

In recent years, a mechanism for moving the seat cushion to the floor of the foot in conjunction with the tilting operation of the seat back has been developed. In this case, it is necessary to operate the seat cushion smoothly.
Therefore, an object of the present invention is to make the seat cushion accommodating operation smooth.

In order to solve the above problems, the invention described in claim 1
In a retractable rear seat including a seat back portion and a seat cushion portion,
The seat back portion is
Equipped with a seat back body that can be tilted on the floor,
The seat cushion part is
A seat cushion body that is horizontally disposed on the floor surface in front of the seat back body and can be accommodated with respect to a foot floor surface that is one step lower than the floor surface;
A switching mechanism for switching between a horizontal state on the floor surface of the seat cushion body and an accommodation state on the floor surface under the feet,
The switching mechanism is
It is attached to each of the seat cushion main body and the foot floor surface so as to be rotatable, and is rotated in the front-rear direction with respect to the foot floor surface, so that the horizontal state on the floor surface and the foot floor surface are A pair of left and right legs that support the seat cushion body so as to guide between the accommodation states;
A connection frame spanned between the pair of legs,
The connecting frame is formed in a curved shape so as to protrude forward when the seat cushion main body is in a horizontal state on the floor surface.

The invention according to claim 2 is the retractable rear seat according to claim 1,
The connection frame is attached to the longitudinal center of the leg,
Both end portions of the connection frame are fixed at positions shifted in the convex direction of the connection frame from the center of the cross-sectional shape orthogonal to the longitudinal direction of the leg portion.

  According to the first aspect of the present invention, when the seat cushion body is in a horizontal state on the floor surface, the connecting frame is formed in a curved shape so as to protrude forward, so that the pair of legs The gap between the connecting frame and the seat cushion main body can be secured until the section guides the seat cushion main body from the horizontal state on the floor surface to the accommodated state on the foot floor surface. Thereby, it can prevent that a connection frame contacts a seat cushion main body during accommodation operation, and it becomes possible to make accommodation operation of a seat cushion main body smooth.

  According to the second aspect of the present invention, since the connecting frame is fixed at a position shifted in the convex direction of the connecting frame from the center of the cross-sectional shape orthogonal to the longitudinal direction of the leg, the connecting frame is attached to the leg. Work can be made easy.

It is a side view which shows schematic structure of the retractable rear seat which concerns on this embodiment. It is a side view which shows the internal structure of the retractable rear seat of FIG. It is a perspective view which shows the internal structure of the retractable rear seat of FIG. It is a perspective view which shows schematic structure of the reinforcement member of this embodiment. It is a perspective view which shows schematic structure of another reinforcement member of this embodiment. It is a perspective view which shows schematic structure of the locking mechanism for seat cushions of this embodiment. It is a side view which shows schematic structure of the locking mechanism for seat cushions of this embodiment. It is a side view which shows the relationship between the track | orbit of the shaft for locking of this embodiment, and a control nail | claw part. It is explanatory drawing which shows typically the relationship between the cam surface of the ratchet part of this embodiment, and the cam surface of a control nail | claw part. It is a side view which shows the relationship between the rocking | swiveling path | route of the rocking | swiveling member of this embodiment, and a ratchet part. It is a front view which shows schematic structure of the switching mechanism in case the seat cushion main body of this embodiment is a horizontal state. It is the perspective view seen from the diagonal left front which shows schematic structure of the switching mechanism in case the seat cushion main body of this embodiment is a horizontal state. It is the perspective view seen from right diagonal front which shows schematic structure of the switching mechanism in case the seat cushion main body of this embodiment is a horizontal state. It is explanatory drawing which shows schematic structure of the flame | frame part of this embodiment. It is a side view which shows typically operation | movement of the switching mechanism of this embodiment. It is a side view which shows typically operation with a seat back part and a seat cushion part of this embodiment. It is a side view which shows the modification of the approach prevention member of FIG. It is a side view which shows the modification of the base plate of FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

1 is a side view showing a schematic configuration of a retractable rear seat according to the present embodiment, FIG. 2 is a side view showing an internal configuration of the retractable rear seat, and FIG. 3 is a perspective view showing an internal configuration of the retractable rear seat. . As shown in FIG. 3, the retractable rear seats 1A and 1B are provided in a pair on the left and right sides, and can be stored independently. Here, the right retractable rear seat 1A is formed to be narrower than the left retractable rear seat 1B.
As shown in FIG. 1, the retractable rear seats 1 </ b> A and 1 </ b> B include a seat back portion 2 and a seat cushion portion 3, which are covered with seat pads 21 and 31.

  First, the seat back unit 2 will be described. The seat back portion 2 includes a seat back body 4 that stands upright on the floor surface 100 of the vehicle body, and a seat back locking mechanism 5 that locks the tilt of the seat back body 4.

  As shown in FIGS. 2 and 3, the seat back body 4 includes a seat back frame 41 that forms the outer periphery of the seat back body 4, a back plate portion 42 attached to the seat back frame 41, and left and right sides of the seat back frame 41. Hinge portions 43 and 44 that are rotatably supported on the floor surface 100 so that the seat back frame 41 can be tilted.

The seat back frame 41 has a different configuration for each of the left and right retractable rear seats 1A and 1B. First, the seat back frame 41a of the right retractable rear seat 1A will be described.
As shown in FIG. 3, the right seat back frame 41a includes a first pipe portion 411a formed by bending one pipe so as to surround the upper side and the left and right sides of the back plate portion 42a, and a lower side of the back plate portion 42a. And a second pipe portion 412a made of a straight pipe connected to both ends of the first pipe portion 411a. As a result, the entire seat back frame 41a surrounds the outer periphery of the back plate portion 42a.
Wires 45a and 46a for attaching a child seat (not shown) are provided inside the left and right corners formed by the first pipe portion 411a and the second pipe portion 412a.

Of the hinge parts 43a, 44a, the hinge part 43a outside the vehicle is a hinge shaft that is rotatably engaged with the support bracket 101 provided on the floor surface 100, and is fixed to the second pipe part 412a by welding. ing.
On the other hand, of the hinge portions 43a and 44a, the hinge portion 44a on the vehicle center side is a hinge bracket that is rotatably engaged with a center hinge bracket 102 provided on the floor surface 100 via a hinge shaft 441. is there. The hinge portion 44a is attached to the lower end portion on the left side of the back plate portion 42a. Here, a reinforcing member 47a is provided at the lower left end portion of the back plate portion 42a so as to surround the hinge portion 44a and the wire 46a.

FIG. 4 is a perspective view showing a schematic configuration of the reinforcing member 47a.
The reinforcing member 47a is thicker than the back plate portion 42a, and is fixed to the first pipe portion 411a and the second pipe portion 412a by welding. The welded portions 471a and 472a of the reinforcing member 47a are formed in a rib shape to ensure welding strength. In addition, screw portions 473a for fixing the hinge portion 44a are provided on the upper and lower portions of the reinforcing member 47a. Since the hinge portion 44a is fixed to the back plate portion 42a via the reinforcing member 47a, the attachment strength of the hinge portion 44a is increased.

Next, the seat back frame 41b of the left retractable rear seat 1B will be described.
As shown in FIG. 3, the left seat back frame 41b includes a pipe portion 411b formed by bending a single pipe so as to surround the entire circumference of the back plate portion 42b. The pipe portion 411b is bent so that the lower right end portion is chamfered and does not surround only the corner portion at the lower right end of the back plate portion 42b. Moreover, the both ends of the pipe part 411b are joined by welding at the lower left end part of the back plate part 42b. On the inner side of the pipe portion 411b, a reinforcing pipe 412b is provided that spans the upper side and the lower side of the pipe portion 411b.

  Wires 45b and 46b for mounting a child seat (not shown) are provided at the left corner formed by the lower sides of the reinforcing pipe 412b and the pipe portion 411b and the corner formed by the left and lower sides of the pipe portion 411b.

Of the hinge parts 43b and 44b, the hinge part 43b outside the vehicle is a hinge shaft that is rotatably engaged with the support bracket 101 provided on the floor surface 100, and is welded to the lower left end of the pipe part 411b. It is fixed.
On the other hand, of the hinge portions 43b and 44b, the hinge portion 44b on the vehicle center side is a hinge bracket that is rotatably engaged with a center hinge bracket 102 provided on the floor surface 100 via a hinge shaft 441. is there. The hinge portion 44b is attached to the lower end portion on the right side of the back plate portion 42b. Here, a reinforcing member 47b is provided at the lower left end portion of the back plate portion 42b so as to surround the hinge portion 44b.

FIG. 5 is a perspective view showing a schematic configuration of the reinforcing member 47b.
The reinforcing member 47b is thicker than the back plate portion 42b, and is fixed to the lower right end portion of the pipe portion 411b by welding. The reinforcing member 47b is formed with ribs 471b over its entire circumference, and the overall strength is increased. In addition, screw portions 473b for fixing the hinge portion 44b are provided on the upper and lower portions of the reinforcing member 47b. Since the hinge portion 44b is fixed to the back plate portion 42b via the reinforcing member 47b, the attachment strength of the hinge portion 44b is increased.

  As shown in FIG. 3, the seat back locking mechanism 5 includes a lever portion 51 provided on the upper outer side of the seat back main body 4 and an outer side portion of the seat back main body 4, and a locked portion 115 ( And a lock portion 52 that engages with the device (see FIG. 1). The lock portion 52 engages with the locked portion of the vehicle body when the seat back body 4 is in the standing state, and locks the standing state. However, when the lever portion 51 is operated, Is unlocked, and the seat back body 4 can be tilted freely.

  When the seat back body 4 is tilted after the lock by the seat back locking mechanism 5 is released at the lower end of the seat back body 4 of each of the left and right retractable rear seats 1A, 1B, the tilting operation is interlocked. A swinging member 6 that swings back and forth is provided. The swing member 6 is formed by refracting a metal rod so as to have a rectangular frame shape extending downward. The swing member 6 is fixed to the approximate center of each of the second pipe portion 412a and the pipe portion 411b by welding.

  The seat cushion portion 3 includes a seat cushion main body 7, a seat cushion locking mechanism 8, and a switching mechanism 9. Of these, only the seat cushion body 7 has a different width for each of the left and right retractable rear seats 1A and 1B, and the seat cushion locking mechanism 8 and the switching mechanism 9 are the same in the left and right retractable rear seats 1A and 1B. It is a configuration.

  The seat cushion body 7 is disposed horizontally on the floor surface 100 in front of the seat back body 4 and can be accommodated in a foot floor surface 110 that is one step lower than the floor surface 100. Hereinafter, a state in which the seat cushion body 7 is horizontal on the floor surface 100 is referred to as a horizontal state, and a state in which the seat cushion body 7 is accommodated in the foot floor surface 110 is referred to as an accommodation state. A locking shaft 71 that engages with the seat cushion locking mechanism 8 is provided at the center of the rear end portion of the seat cushion body 7 so as to extend in the left-right direction. Further, a posture maintaining portion 72 is provided on the front lower surface of the seat cushion main body 7 so as to contact the foot floor surface 110 in the accommodated state and maintain the posture of the seat cushion main body 7.

  As shown in FIG. 3, the seat cushion locking mechanism 8 is provided on the floor 100 so as to be disposed below the seat back body 4 and behind the seat cushion body 7 in a horizontal state. . The seat cushion locking mechanism 8 is configured to lock the horizontal state of the seat cushion body 7 by engaging with the locking shaft 71.

  Hereinafter, the seat cushion locking mechanism 8 will be described in detail. FIG. 6 is a perspective view showing a schematic configuration of the seat cushion locking mechanism 8, and FIG. 7 is a side view. As shown in FIGS. 6 and 7, the seat cushion locking mechanism 8 includes a base plate 81, a regulation claw portion 82, and a ratchet portion 83.

  The base plate 81 includes a pair of left and right plate plates 811. The plate plate 811 includes a bottom portion 813 fixed to the floor surface 100 with screws 812 and a plate body 814 erected from the inner end of the bottom portion 813. Have. The plate main body 814 is formed with a notch 815 that is open at the top and extends in the up-down direction.

  FIG. 8 is a side view showing the relationship between the track R of the locking shaft 71 and the restricting claw portion 82. As shown in FIG. 8, the notch 815 is formed along the track R of the lock shaft 71. When the horizontal state / accommodation state of the seat cushion body 7 is switched, the lock shaft 71 is notched 815. It will advance and retreat inside. In addition, R1 and R2 in FIG. 8 are lines indicating variations in the track R of the lock shaft 71, but the lock shaft 71 can be accommodated even if the track R varies slightly in the front-rear direction. The width of the notch 815 is set. An auxiliary notch 816 extending continuously forward from the notch 815 is provided at the lower end of the notch 815.

Behind the notch 815, a first rotation shaft 817 that rotatably holds the restricting claw portion 82 and a second rotation shaft 818 that rotatably holds the ratchet portion 83 are disposed between the pair of base plates 81. It is stretched over.
Further, in order to prevent the locking shaft 71 from entering the auxiliary notch 816 at the bottom 813 of at least one base plate 81 of the pair of base plates 81, an entry preventing member that closes the auxiliary notch 816 is provided. 84 is provided. The intrusion preventing member 84 is a leaf spring and is formed in an inverted V shape. The intrusion prevention member 84 is disposed along the front-rear direction so that the inverted V-shaped one side portion 841 closes the notch 815 side of the auxiliary notch 816. One end 842 of the entry preventing member 84 is fixed to the center of the bottom 813 of the base plate 81, and the other end 843 is lifted from the bottom 813. For example, when a load on the loading platform collides with the seat back main body 4 from the rear due to a frontal collision, the locking shaft body 71 comes into contact with one side portion 841 of the entry preventing member 84. At this time, when a predetermined load or more is applied to the entry preventing member 84, the entry preventing member 84 is deformed to open the auxiliary notch 814 (see the dotted line portion T in FIG. 8). Here, the predetermined load for deforming the entry preventing member 84 can be adjusted by changing the thickness of the leaf spring of the entry preventing member 84 and the elastic coefficient.

  A separation preventing member 85 that prevents the entry preventing member 84 from being separated from the plate body 814 of the base plate 81 due to deformation is attached to the bottom 813 of the base plate 81. The separation preventing member 85 is a plate-like member, and is disposed along the front-rear direction on the side of the other end portion 843 of the entry preventing member 84. The other end 843 of the entry preventing member 84 is sandwiched between the plate body 814 and the separation preventing member 85. When the intrusion preventing member 84 is deformed and moves in the front-rear direction, the separation preventing member 85 prevents the shift in the direction away from the plate body 814.

  When the luggage collides from the rear and the entire retractable rear seats 1A and 1B move forward, the locking shaft 71 deforms the entry preventing member 84 and enters the auxiliary notch 816. When entering the auxiliary notch 816, the upward movement of the locking shaft 71 is restricted, so that the seat cushion body 7 itself is also locked in a horizontal state. In this way, even if the luggage collides from the back and the seat back main body 4 tilts, the seat cushion main body remains locked, so that it is prevented from operating in conjunction with the tilt of the seat back main body 4. be able to.

The restricting claw portion 82 is rotatably attached to the base plate 81 by a first rotation shaft 817. A concave portion 821 with which the locking shaft 71 is engaged is formed at the distal end portion of the restricting claw portion 82. A state in which the locking shaft body 71 is engaged in the recess 821 and the tip end portion is substantially directed forward is referred to as a restricted state (see a one-dot chain line T1 shown in FIG. 8). The state of being separated and having the tip end substantially upward is referred to as a released state (see a solid line T2 shown in FIG. 8). The restricting claw portion 82 is applied with an urging force by the urging spring 822 toward the direction Y1 that is always released.
A cam surface 823 that engages with the ratchet portion 83 is formed at the base end portion of the restricting claw portion 82. The cam surface 823 is formed with an arc-shaped first cam surface 824 and a planar second cam surface 825 formed continuously below the first cam surface 824. The second cam surface 825 is locked to the ratchet portion 83 in the restricted state, and restricts further rotation by the biasing spring 822. Further, in the released state, the second cam surface 825 is locked to a stopper 819 provided on the bottom 813 of the base plate 81 and restricts further rotation by the biasing spring 822.

  When the locking shaft 71 guided by the notch 815 is engaged with the recess 821 of the regulating claw 82 in the released state, the regulating claw 82 is pushed by the locking shaft 71 and rotates. By this rotation, the restricting claw portion 82 closes the upper portion of the lock shaft 71 and closes the ascending operation of the lock shaft 71 to be in a restricted state. At this time, the restricted state is locked by the ratchet portion 83.

  The ratchet portion 83 is rotatably attached to the base plate 81 by a second rotation shaft 818. The ratchet portion 83 is engaged with the restriction claw portion 82 to lock / release the restriction state of the restriction claw portion 82. One end portion 831 of the ratchet portion 83 is engaged with the cam surface 823 of the restricting claw portion 82, and the end surface is a cam surface 832. And the ratchet part 83 is always urged | biased by the direction Y2 which locks the control nail | claw part 82 by the urging | biasing spring which is not shown in figure.

  FIG. 9 is an explanatory view schematically showing the relationship between the cam surface 832 of the ratchet portion 83 and the cam surface 823 of the restricting claw portion 82. The cam surface 832 of the ratchet portion 83 has an inclined shape so that the upper portion 833 protrudes from the lower portion 834 toward the regulating claw portion 82. As shown in FIG. 9A, the cam surface 832 of the ratchet portion 83 starts from the first cam surface 824 of the restriction claw portion 82 from the middle of the rotation of the restriction claw portion 82 from the released state to the restricted state. The engaging position is switched to the two cam surface 825. At this time, if the cam surface 832 of the ratchet portion 83 is flat, the rotation path of the restricting claw portion 82 after switching is as indicated by a two-dot chain line t1 in FIGS. 9B and 9C. However, as described above, when the upper portion 833 of the cam surface 832 of the ratchet portion 83 is inclined so as to protrude from the lower portion 834 toward the restriction claw portion 82 side, the restriction claw portion 82 after switching is changed. The rotation path is more rotated than that indicated by the two-dot chain line t1 in FIGS. 9B and 9C. That is, when the ratchet portion 83 locks the restriction state of the restriction claw portion 82, the restriction claw portion 82 is pushed into the notch 815 side, and a stronger restriction state can be realized.

FIG. 10 is a side view showing the relationship between the swing path K of the swing member 6 and the ratchet portion 83. As shown in FIG. 10, the other end portion 835 of the ratchet portion 83 is disposed on the swing path K of the swing member 6. The upper surface of the other end 835 is formed in a substantially hemiform shape, and the inner surface is referred to as a first pressing surface 836 and the outer surface is referred to as a second pressing surface 837. The first pressing surface 836 intersects the swing path K1 of the swinging member 6 when tilted so that the seatback body 4 is pressed by the swinging member 6 when tilted from the standing state. On the other hand, the second pressing surface 837 intersects the swing path K2 of the swinging member 6 at the time of standing so that the seatback body 4 is pushed by the swinging member 6 when the seatback body 4 is lifted from the tilted state. Yes. When the first pressing surface 836 and the second pressing surface 837 are pressed by the swing member 6, the ratchet portion 83 is rotated in a direction opposite to the biased direction Y <b> 2, thereby moving the swing path K from the swing path K. It is formed so as to be retracted. For this reason, the ratchet portion 83 can be retracted from the swinging path K regardless of whether the seatback body 4 is tilted from the standing state or from the tilted state. Accordingly, when the seat back body 4 is raised from the tilted state, even if the swing member 6 comes into contact with the other end portion 835 of the ratchet portion 83 on the swing path K, the ratchet section 83 is moved to the swing path. It is possible to smoothly retreat from K, and the standing operation is also smooth.
When the seat back body 4 is in the standing state, the swing member 6 is separated from the ratchet portion 83 of the seat cushion locking mechanism 8 and the seat back body 4 tilts. The rocking member 6 comes into contact with the other end portion 835 of the ratchet portion 83 to release the lock of the seat cushion locking mechanism 8.

  As shown in FIG. 7, the restriction claw portion 82 in the restricted state is locked because the cam surface 832 of the ratchet portion 83 is engaged with the second cam surface 825 of the restriction claw portion 82. ing. In this state, when the seat back body 4 is tilted from the standing state, the swinging member 6 swings in the direction of the arrow Y3, and the first pressing surface 836 of the ratchet portion 83 is moved against the biasing force of the biasing spring. By pushing, the ratchet part 83 is rotated in the arrow Y4 direction. By this rotation, the lock is released, and the restricting claw portion 82 is rotated in the direction of the arrow Y5 by the urging force of the urging spring 822, and the restriction of the lock shaft 71 is released to enter the released state.

  The switching mechanism 9 switches the horizontal state and the accommodated state of the seat cushion body 7. FIG. 11 is a front view showing a schematic configuration of the switching mechanism 9 when the seat cushion body 7 is in a horizontal state, FIG. 12 is a perspective view seen from the diagonally left front, and FIG. 13 is a perspective view seen from the diagonally right front. FIG. As shown in FIGS. 11 to 13, the switching mechanism 9 includes a frame portion 91, a foot side bearing portion 92, a seat side bearing portion 93, a guide member 94, and a rotation urging portion 95. Yes.

14A and 14B are explanatory views showing a schematic configuration of the frame portion 91, in which FIG. 14A is a cross-sectional view taken along the line aa of FIG. As shown in FIG. 14, the frame portion 91 is provided with a pair of leg portions 911 and 912 that are parallel to each other, and a connecting frame 913 that connects the pair of leg portions 911 and 912.
The leg portions 911 and 912 are formed of metal pipes, and a rotation shaft portion 914 that is pivotally supported by the foot side bearing portion 92 is formed at the lower end portion thereof. A shaft hole 915 for pivotally supporting the seat side bearing portion 93 is formed at the upper end portions of the leg portions 911 and 912.
The connection frame 913 is attached to the center portion in the longitudinal direction of the pair of leg portions 911 and 912. As shown in FIGS. 12 and 13, the connecting frame 913 is formed in a curved shape so as to protrude forward when the seat cushion body 7 is in a horizontal state. As shown in FIG. 14A, both end portions of the connection frame 913 are welded to positions shifted in the convex direction of the connection frame 913 from the center S of the cross-sectional shape orthogonal to the longitudinal direction of the leg portions 911, 912. It is fixed by etc.

  Further, an urging engagement member 96 having a substantially L shape in front view with which the rotation urging portion 95 engages is attached to the left leg portion 911 and the connecting frame 913 by welding or the like.

  As shown in FIGS. 11 to 13, a pair of foot-side bearing portions 92 are provided so as to correspond to the pair of leg portions 911, 912, and each of them has a predetermined interval in the left-right direction and a foot floor 110. Is installed. Further, a pair of seat side bearing portions 93 are provided so as to correspond to the pair of leg portions 911, 912, and each is fixed to the lower surface of the seat cushion body 7 with a predetermined interval in the left-right direction. Thereby, in a state where the pair of leg portions 911, 912 supports the seat cushion body 7, it is possible to guide between the horizontal state and the accommodated state.

  The guide member 94 is disposed outside the pair of leg portions 911 and 912 and on the right side which is the center side of the vehicle. The guide member 94 guides the seat cushion body 7 between the horizontal state and the accommodated state together with the pair of leg portions 911 and 912. The guide member 94 is formed of a metal round bar, and both end portions thereof are bent. The upper end portion of the guide member 94 is pivotally supported by the seat side bearing portion 93 to be a pivot shaft 941 that can pivot. The lower end portion of the guide member 94 is pivotally supported horizontally by the foot-side bearing portion 92, thereby forming a pivotable pivot shaft 942. A pivot shaft 941 on the seat cushion body 7 side of the guide member 94 is disposed in front of the pivot shaft on the seat cushion body 7 side of the pair of leg portions 911 and 912. On the other hand, the pivot shaft 942 on the foot floor surface 110 side of the guide member 94 is disposed in front of and below the pivot shaft on the foot floor surface 110 side of the pair of leg portions 911 and 912. Because of this positional relationship, the seat cushion body 7 can be smoothly accommodated when the seat cushion body 7 is disposed substantially horizontally in the accommodated state.

  The rotation urging portion 95 gives a turning force when guiding the seat cushion body 7 from at least one of the pair of leg portions 911 and 912 from the horizontal state to the accommodated state. It is. The rotation urging portion 95 is a spring, and is disposed inside the pair of leg portions 911 and 912 and on the side of the foot floor surface 110 of the leg portion 911. The inner end portion of the rotation urging portion 95 is fixed to the left foot bearing portion 92, and the outer end portion is engaged with the urging engagement member 96. When the seat cushion main body 7 is in a horizontal state, the outer end portion of the rotation urging portion 95 is engaged with the urging engagement member 96 to apply an urging force to the left leg portion 911. Then, the outer end portion of the rotation urging portion 95 is separated from the urging engagement member 96 while the seat cushion body 7 is guided from the horizontal state to the accommodated state.

Specifically, the operation of the switching mechanism 9 will be described. FIG. 15 is a side view schematically showing the operation of the switching mechanism 9. The solid line portion in FIG. 15 shows the seat cushion body 7 and the switching mechanism 9 in the horizontal state, and the two-dot chain line portion shows the seat cushion body 7 and the switching mechanism 9 during the switching operation. When the seat cushion lock mechanism 8 is unlocked from the horizontal state, there is no pressing against the rotation urging member 95, so that the legs 911 and 912 rotate forward by the urging force of the rotation urging member 95. As a result, the seat cushion body 7 also moves forward. At the time of this movement, flapping of the seat cushion body 7 is suppressed by the guide member 94. Further, when the seat cushion body 7 is in a horizontal state, the connecting frame 913 is formed in a curved shape so as to protrude forward, so that the pair of legs 911, 912 A gap between the central portion of the connection frame 913 and the seat cushion main body 7 can be ensured before guiding from the horizontal state to the accommodated state. Thereby, it is possible to prevent the connecting frame 913 from coming into contact with the seat cushion main body 7 during the accommodating operation, and the accommodating operation of the seat cushion main body 7 can be made smooth. After the housing, the connecting frame 913 protrudes downward, so that the seat cushion body 7 can be dropped downward, and the space can be used more effectively.
Further, while the seat cushion main body 7 is being guided from the horizontal state to the accommodated state, the rotation urging member 95 is separated from the urging engagement member 96, so that after the separation, the pair of leg portions 911, 912 has The seat cushion body 7 moves while the urging force is no longer applied and the rotational force decreases. Then, when the posture maintaining unit 72 is in contact with the foot floor 110, the switching operation is completed, and the seat cushion body 7 is in the accommodated state. In the accommodated state, the seat cushion main body 7 is kept substantially horizontal by the guide member 94 and the posture maintaining portion 72.

  Next, the interlocking | linkage at the time of accommodation operation | movement of the seat back part 2 and the seat cushion part 3 is demonstrated. FIG. 16 is a side view schematically showing the operation of the seat back portion 2 and the seat cushion portion 3. 16 shows the seat back portion 2 and the seat cushion portion 3 in a seatable state (horizontal state), and the two-dot chain line portion shows the seat back portion 2 and the seat cushion portion 3 during the storing operation. Is shown. When the seat back lock mechanism 5 is unlocked from the seatable state and the seat back main body 4 is tilted, the swinging member 6 unlocks the seat cushion lock mechanism 8 before being completely folded. Thereby, the urging force of the rotation urging member 95 acts on the pair of leg portions 911 and 912 to rotate the pair of leg portions 911 and 912. As a result, the seat cushion body 7 is switched from the horizontal state to the accommodated state. When the seat cushion body 7 is in the accommodated state, the user completely folds the seat back body 4 and completes the accommodating operation.

As described above, according to the present embodiment, when the seat cushion body 7 is in a horizontal state, the connection frame 913 is formed in a curved shape so as to protrude forward, so that the pair of legs Until the portions 911 and 912 guide the seat cushion body 7 from the horizontal state to the accommodated state, a gap in the central portion between the connecting frame 913 and the seat cushion body 7 can be secured. Thereby, it is possible to prevent the connecting frame 913 from coming into contact with the seat cushion main body 7 during the accommodating operation, and the accommodating operation of the seat cushion main body 7 can be made smooth.
Further, after the housing, the connecting frame 913 protrudes downward, so that the seat cushion body 7 can be dropped downward, and the space can be used more effectively.

  Further, since the connecting frame 913 is fixed at a position shifted in the convex direction of the connecting frame 913 from the center of the cross-sectional shape perpendicular to the longitudinal direction of the leg portions 911, 192, the connecting frame 913 is attached to the legs 911, 912. Installation work can be made easy.

The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.
For example, in the above-described embodiment, the case where the auxiliary notch 816 extends forward has been described as an example. However, when the load direction of the impact from the back surface of the seat back main body 4 is shifted from the front-rear direction, The auxiliary cutout 816 is preferably provided in parallel to the load direction. Thereby, when the retractable rear seat 1 as a whole moves forward due to an impact from the back, the locking shaft 71 can be easily accommodated in the auxiliary notch 816.

In addition, the intrusion prevention member 84 may be an intrusion prevention member 84a made of a leaf spring protruding upward so as to close at least the auxiliary notch 816, as shown in FIG.
Furthermore, if not considering the collision from the back, the auxiliary notch 816 and the entry preventing member 84 may be omitted as shown in FIG. Thereby, the manufacturing man-hour and the number of parts of the base plate 81 can be reduced.

  Moreover, although the case where the guide member 94 was formed from the round bar material was illustrated in the said embodiment, what kind of form may be sufficient if it is a rod-shaped member, and even if it is a square bar, it is a pipe. It may be a material.

DESCRIPTION OF SYMBOLS 1 Retractable rear seat 2 Seat back part 3 Seat cushion part 4 Seat back main body 5 Seat back lock mechanism 6 Swing member 7 Seat cushion main body 8 Seat cushion lock mechanism 9 Switching mechanism 21, 31 Seat pad 41 Seat back frame 42 Back Plate part 43, 44 Hinge part 45a, 46a Wire 45b, 46b Wire 47a Reinforcement member 47b Reinforcement member 51 Lever part 52 Lock part 71 Locking shaft body 72 Body force maintenance part 81 Base plate 82 Restriction claw part 83 Ratchet part 84 Ingress prevention member 85 Separation preventive member 91 Frame portion 92 Foot side bearing portion 93 Seat side bearing portion 94 Guide member 95 Rotating biasing portion 96 Biasing engagement member 100 Floor surface 101 Support bracket 102 Center hinge bracket 110 Foot floor surface 115 Covered Locking portion 811 Plate plate 812 Screw 813 Bottom portion 814 Plate body 815 Notch 816 Auxiliary notch 817 First rotation shaft 818 Second rotation shaft 819 Stopper 821 Recess 822 Biasing spring 823 Cam surface 824 First cam surface 825 Second cam Surface 831 One end portion 832 Cam surface 833 Upper portion 834 Lower portion 835 Other end portion 836 First pressing surface 837 Second pressing surface 841 One side portion 842 One end portion 843 Other end portion 911, 912 Leg portion 913 Connection frame 914 Rotating shaft Portion 915 Shaft hole 941 Rotating shaft 942 Rotating shaft

Claims (2)

In a retractable rear seat including a seat back portion and a seat cushion portion,
The seat back portion is
Equipped with a seat back body that can be tilted on the floor,
The seat cushion part is
A seat cushion body that is horizontally disposed on the floor surface in front of the seat back body and can be accommodated with respect to a foot floor surface that is one step lower than the floor surface;
A switching mechanism for switching between a horizontal state on the floor surface of the seat cushion body and an accommodation state on the floor surface under the feet,
The switching mechanism is
It is attached to each of the seat cushion main body and the foot floor surface so as to be rotatable, and is rotated in the front-rear direction with respect to the foot floor surface, so that the horizontal state on the floor surface and the foot floor surface are A pair of left and right legs that support the seat cushion body so as to guide between the accommodation states;
A connection frame spanned between the pair of legs,
The retractable rear seat, wherein the connecting frame is formed in a curved shape so as to protrude forward when the seat cushion body is in a horizontal state on the floor surface. The retractable rear seat according to claim 1,
The connection frame is attached to the longitudinal center of the leg,
The retractable rear seat, wherein both ends of the connection frame are fixed at positions shifted in a convex direction of the connection frame from a center of a cross-sectional shape orthogonal to the longitudinal direction of the leg.

Images