JP4924181B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat.

  In a seat (vehicle seat) provided in a vehicle, for example, as disclosed in Patent Document 1, in a standing state of the seat back, the seat side portion of the seat cushion is positioned at a high position by the urging force of the torsion spring. There is a structure in which it is pulled down to a low position via a cable wire when folded.

However, in the structure of Patent Document 1, a cable wire that interlocks with the seat back is required to deform the seat cushion, and the structure becomes complicated.
JP 2000-316663 A

  In view of the above-described facts, an object of the present invention is to obtain a vehicle seat that has a simple structure and can deform both side portions of the seat cushion in the width direction to the seat surface side or the back surface side.

  In the first aspect of the present invention, a seat cushion disposed on the floor of the vehicle body, a support member that supports the seat cushion so as to be rotatable forward about its front portion, and a width within the seat cushion. An elastic member that is provided on both sides in the direction and is elastically deformed so as to be convex on either the seating surface side or the back surface side of the seat cushion, and the elastic member, and the seat cushion on the floor A guide member that is convex toward the seating surface in the seated state and that is convex toward the back side when the seat cushion is rotated forward.

  In this vehicle seat, the seat cushion is supported by the support member, and the seat cushion can be rotated from the seating state disposed on the floor to the front side around the front portion to be in the standing state.

  The elastic member provided in the seat cushion is guided by the guide member so as to be convex toward the seat surface when the seat cushion is seated, and convex toward the back side when the seat cushion is standing. Moreover, the elastic member is provided in the width direction both sides within the seat cushion. Therefore, in conjunction with the rotational movement of the seat cushion, both sides in the width direction of the seat cushion seat surface are positioned above the center portion in the width direction in the upright state, and both side portions in the width direction on the back side are in the center portion in the width direction in the upright state. It will be located below. Thereby, the cable wire etc. which interlock | cooperate with a seat back become unnecessary, and the width direction both sides part of a seat cushion can be changed into a seat surface side or a back side by simple structure.

  In the invention according to claim 2, in the invention according to claim 1, the guide member has a fixing piece for fixing the front end of the elastic plate member in a range between the seating state and the standing state. It is characterized by.

  For this reason, the front end portion of the elastic plate member faces the seat surface side when the seat cushion is in the seated state, and faces the back side when the seat cushion is in the standing state, by the fixing piece. With such a simple structure that only provides a fixing piece, the elastic member can be convex on the seating surface side or the back surface side according to the posture of the seat back.

  In invention of Claim 3, in the invention of Claim 1 or Claim 2, a seat back rotatably supported at the back of the seat cushion, a headrest provided on an upper part of the seat back, The seat cushion stands up to a position where it is not in contact with the seatback and the headrest that are tilted forward.

  Therefore, when the seat cushion is set in the standing state, it is possible to prevent contact with the forwardly lowered seat back (or the headrest on the upper portion of the seat back). In addition, in the present invention, in the standing state of the seat cushion, the center portion in the width direction of the back of the seat back is recessed relative to the both sides in the width direction (strictly in front), and is thus recessed. By using the headrest in the space, the space can be used efficiently.

  Since the present invention has the above-described configuration, it is possible to deform the both side portions of the seat cushion in the width direction to the seat surface side or the back surface side with a simple structure.

  1 to 3 schematically show a vehicle seat 12 according to an embodiment of the present invention in a side view. FIG. 4 also schematically shows the vehicle seat 12 in a perspective view.

  In each drawing, the front side of the vehicle is indicated by an arrow FR, the vehicle width direction is indicated by an arrow W, and the upper side is indicated by an arrow UP. Some vehicle seats are of a type that can rotate around the center of rotation in the vertical direction, and the front of the vehicle may not coincide with the front of the vehicle seat due to the rotation. The seat 12 is described as being installed facing the front of the vehicle. In the following, the “width direction central portion” refers to a central portion (a portion that is relatively close to the center line CL) when viewed from the center line CL of the vehicle seat (see FIGS. 7A and 7B). ) Means the “outer side part (relatively far from the center line CL)” when viewed from the center line CL of the vehicle seat.

  On the floor 14 of the vehicle body on which the vehicle seat 12 is installed, an installation base portion 14D bulging upward is formed. The vehicle seat 12 includes a seat cushion 16 on which an occupant can sit, a seat And a seat back 18 capable of supporting the back surface (back portion) of an occupant (sitting person) seated on the cushion 16. Further, a headrest 20 capable of supporting the seated person's head is provided on the upper portion of the seat back 18.

  A pair of lower arms 22 are erected from the floor 14 at a position behind the seat cushion 16 and fixed to the floor 14. The lower arm 22 is arranged at a predetermined interval in the vehicle width direction (arrow W direction).

  In the vicinity of the upper end of the lower arm 22, a rotation support portion 24 that supports the seat back 18 so as to be rotatable is set. The seat back 18 rotates about the rotation support portion 24, for example, increases the inclination angle to the rear side, or folds to the front side (arrow A direction) as shown in FIG. Can do. The seat back 18 can be fixed at an arbitrary angle by a fixing mechanism (not shown).

  As shown in detail in FIGS. 5 and 6, a substantially U-shaped seat cushion frame 26 is disposed in the seat cushion 16. The seat cushion frame 26 is made of a material having high rigidity such as metal, and the shape of the seat cushion 16 is maintained.

  In addition, a pair of brackets 28 are fixed to the front surface of the installation table 14D with a certain interval in the width direction, and a hinge 30 is provided on each bracket 28. An end portion of the seat cushion frame 26 is rotatably attached to each of the hinges 30. As a result, the seat cushion 16 as a whole is also in a seated state (see FIGS. 1, 4 and 5) in which an occupant can be seated, and an upright state (FIGS. 3 and FIG. 6). In the following description, regarding the seat cushion 16, the upper surface in the seated state is the surface on which the occupant is actually seated, and hence the seat surface 46 is the opposite surface (the lower surface in the seated state).

  The bracket 28 is provided with a front fixing portion 32 above the hinge 30. A rear hinge 34 is provided in the seat cushion 16 at a position near the rear end, and is attached to the seat cushion frame 26 via an attachment plate 36. And between the front side fixing | fixed part 32 and the rear side hinge 34, the elastic board member 38 formed in the elongate board shape by the material (for example, metal) which has elasticity is provided. The front end of the elastic plate member 38 is supported by the front fixing portion 32 and the rear end is supported by the rear hinge 34, and the longitudinal direction of the elastic plate member 38 coincides with the front-rear direction of the vehicle seat 12. Further, the elastic plate member 38 is disposed in both sides in the width direction in the seat cushion 16, and is attached to the internal cushion pad 40 in both sides in the width direction of the seat cushion 16.

  The distance between the front fixing portion 32 and the rear hinge 34 is set to be shorter than the length of the elastic plate member 38 in a natural state (a state in which the elastic plate member 38 is substantially flat without elastic deformation). Therefore, the elastic plate member 38 is curved so as to be convex toward either the seating surface 46 side or the rear surface 48 side of the seat cushion 16 when supported by the front fixing portion 32 and the rear hinge 34. Here, since the elastic plate members 38 are arranged on both sides in the width direction in the seat cushion 16, if the elastic plate members 38 protrude toward the seat surface 46, the width of the seat surface 46 of the seat cushion 16 is increased. Both side portions (hereinafter referred to as “seat surface both side portions 46S”) protrude from the central portion in the width direction (hereinafter referred to as “seat surface center portion 46C”) (the back surface 48 becomes substantially flat). On the other hand, when the elastic plate member 38 is convex toward the back 48, both sides of the back 48 of the seat cushion 16 in the width direction (hereinafter referred to as “back both sides 48 S”) are centered in the width (hereinafter “ (The seat surface 46 is substantially flat or the seat surface side portions 46S are recessed from the seat surface center portion 46C), and the recess 42 is formed in the back center portion 48C (refer to the back center portion 48C). (See FIG. 7B).

  As shown in FIGS. 5 and 6, a fixing piece 44 is attached to the front side fixing portion 32 to sandwich and fix the front end portion of the elastic plate member 38 in the thickness direction. Here, as shown in FIGS. 1 and 2, assuming a straight line L1 connecting the front side fixing portion 32 and the rear side hinge 34, the fixing piece 44 is a straight line L1 (substantially horizontal) when the seat cushion 16 is seated. And the front end portion of the elastic plate member 38 is held at an angle between the straight line L1 (substantially vertical) in the standing state. Accordingly, when the seat cushion 16 is in the seated state as shown in FIGS. 1, 4 and 5, the elastic plate member 38 is fixed to the seating surface 46 side by fixing the front end portion thereof with the fixing piece 44. It becomes convex. From this state, when the seat cushion 16 is rotated about the hinge 30 in the direction of arrow B, the elastic plate member 38 is reversed when the rear hinge 34 exceeds the extension line L2 (see FIG. 1) of the fixed piece 44. It becomes convex toward the back surface 48 side. Conversely, when the seat cushion 16 is rotated in the direction opposite to the arrow B, the elastic plate member 38 is inverted and protrudes toward the seating surface 46 when the rear hinge 34 exceeds the extension line L2. In other words, the fixing piece 44 fixes the front end portion of the elastic plate member 38 to change the curved shape of the elastic plate member 38 in conjunction with the rotational operation of the seat cushion 16, so that the fixed surface 44 is moved to the seat surface 46 side or the back surface 48 side. It has the effect of making it convex.

  As shown in FIG. 3, after the seat cushion 16 is erected, when the seat back 18 is rotated in the direction of arrow A about the rotation support portion 24, the back surface 18H of the seat back 18 becomes substantially horizontal. Thereby, the vehicle interior can be secured widely. At this time, the standing angle, shape (size), and position of the seat cushion 16 are set in relation to the seat back 18 and the headrest 20 so that the seatback 18 and the headrest 20 do not contact the seat cushion 16. In particular, the headrest 20 is accommodated in a recess 42 formed on the back surface 48 side of the seat cushion 16.

  Next, the operation of the vehicle seat 12 of this embodiment will be described.

  In the vehicle seat 12, in the seated state shown in FIGS. 1, 4, and 5, the elastic plate member 38 in the seat cushion 16 is curved so as to protrude toward the seat surface 46. Therefore, as shown in FIG. 7A, the seating surface 46 of the seat cushion 16 has the seating surface side portions 46S positioned above the seating surface central portion 46C. Thereby, in a state where the seated person SP is actually seated on the seat surface 46, the seat surface side portions 46S are positioned on both sides of the seated person SP, and the holdability for the seated person SP is enhanced.

  As shown in FIG. 2, when the seat cushion 16 is rotated from the seated state in the direction of arrow B, the one end side of the elastic plate member 38 is fixed by the fixing piece 44, so the shape of the elastic plate member 38 ( The unevenness is reversed. Thereby, in the standing state shown in FIGS. 2, 3, and 6, the elastic plate member 38 is convex toward the back surface 48. The seat cushion 16 also has a rear side portion 48S protruding from the rear center portion 48C on the back surface 48, and the seat surface 46 is substantially flat or has a seat surface both side portion 46S recessed from the seat surface center portion 46C. Therefore, compared with a seat cushion that is in a standing state with both side portions 46S of the seating surface protruding, a member disposed on the front side of the seat cushion (for example, a vehicle seat or dashboard in the front row). On the other hand, the seat cushion 16 can be rotated in the direction of arrow B to a closer position.

  In the standing state of the seat cushion 16, as shown in FIG. 3, the seat back 18 and the seat cushion 16 do not come into contact with the seat cushion 16 even when the seat back 18 is rotated in the direction of the arrow A to bring it forward. And since the back surface 18H of the seat back 18 is substantially horizontal, the vehicle interior can be secured widely, and for example, it is possible to effectively use the space such as placing luggage.

  At this time, as shown in FIG. 7B, the headrest 20 is accommodated in the recess 42 formed on the back surface 48 side of the seat cushion 16. Therefore, the space can be used more effectively than in the case of the seat cushion in which the concave portion 42 is not configured.

  In the present embodiment, as described above, only the elastic plate member 38 and the fixing piece 44 are provided in order to deform the shape of the seat cushion 16 between the standing state and the forwardly tilted state. That is, for example, a member such as a cable wire that interlocks with the seat back becomes unnecessary, and thus both sides in the width direction of the seat cushion 16 can be deformed to the seat surface 46 side or the back surface 48 side with a simple structure.

  In the above description, the elastic plate member 38 is used as the elastic member of the present invention. However, the elastic plate member 38 is not limited to the elastic plate member 38 as long as it is deformed to the seating surface 46 side or the back surface 48 side by elastic deformation. For example, it is not necessary to be formed in a long plate shape, and may be a rod shape or a coil shape. The material is not limited to metal, and may be configured to have elasticity by resin, for example.

  Further, in the above description, the fixing piece 44 attached to the front side fixing portion 32 is cited as the guide member of the present invention. However, the shape (unevenness) of the elastic member (elastic plate member 38) is changed by the rotational operation of the seat cushion 16. If possible, it is not limited to the fixed piece 44.

It is a side view which shows the vehicle seat of one Embodiment of this invention in a seating state. It is a side view which shows the vehicle seat of one Embodiment of this invention in the standing state of a seat cushion. It is a side view showing the vehicular seat of one embodiment of the present invention in the standing state of a seat cushion, and in the state where the seat back is tilted forward. It is a perspective view which shows the vehicle seat of one Embodiment of this invention in a seating state. It is a perspective view showing the internal structure of the seat cushion which constitutes the vehicle seat of one embodiment of the present invention. 1 is a perspective view showing a vehicle seat according to an embodiment of the present invention in a state in which a seat cushion is raised and in a state in which a seat back is tilted forward. (A) is explanatory drawing which shows the relationship between the seat cushion in a seating state, and a seated person, (B) is explanatory drawing which shows both relationship in a state where a seat cushion is standing up and a seat back is brought forward.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 Vehicle seat 14 Floor 14D Installation stand part 16 Seat cushion 18 Seat back 18H Back surface 20 Headrest 22 Lower arm 24 Rotation support part 26 Seat cushion frame 28 Bracket (support member)
30 Hinge (support member)
32 Front side fixing part 34 Rear side hinge 36 Mounting plate 38 Elastic plate member (elastic member)
40 Cushion pad 42 Recess 44 Fixed piece (guide member)
46 Seat surface 46C Seat surface center portion 46S Seat surface both side portions 48 Back surface 48C Back surface center portion 48S Back both side portions CL Center line SP Seated

Claims (3)

A seat cushion arranged on the floor of the vehicle body;
A support member that supports the seat cushion so as to be rotatable forward about the front portion;
An elastic member provided on both sides in the width direction in the seat cushion, and attached so as to be convex on either the seat surface side or the back side of the seat cushion by elastic deformation;
A guide for guiding the elastic member so that the seat cushion is convex toward the seat surface when the seat cushion is disposed on the floor, and is convex toward the back side when the seat cushion is rotated forward. A member,
A vehicle seat comprising: A fixing piece for fixing the front end of the elastic plate member in a range between the sitting state and the standing state;
The vehicle seat according to claim 1, further comprising: A seat back rotatably supported behind the seat cushion;
A headrest provided on an upper portion of the seat back;
Further comprising
3. The vehicle seat according to claim 1, wherein the seat cushion stands up to a position where the seat cushion is not in contact with the seatback and the headrest that are tilted forward.

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