JP2007237804A - Sheet structure - Google Patents

Abstract

A seat structure capable of reducing a burden of a seating operation and preventing sliding of a contact portion with a seat cushion at the time of sitting.
A seat cushion is divided into a seat cushion front portion and a seat cushion rear portion, and a front end of the seat cushion support portion and a front end of the seat cushion are rotatably connected by a hinge. The seat cushion front part 26 </ b> F and the seat cushion rear part 26 </ b> R are rotatably connected by a hinge 30. When the passenger is not seated on the seat 2 and the door is in the open state, the engagement of the engagement bar 38 by the striker 36 is released, and the seat cushion rear portion 26R is smoothly raised by the urging force of the damper 34. In the state where the seat cushion is raised to the top, the rear portion 26R of the seat cushion is maintained substantially horizontally by the rib 32.
[Selection] Figure 2

Description

  The present invention relates to a seat structure provided in an automobile.

  As a conventional automobile seat structure, for example, Patent Document 1 provides a slide mechanism in which a rear portion of the seat cushion has an upward arc shape on the lower side of the seat cushion so that the rear end portion is lifted on the seat cushion seat surface when the occupant gets on and off. In some cases, the burden of the sitting operation is reduced.

However, in this structure, since the entire seat cushion rotates and tilts forward and downward, the contact portion (mainly the heel) of the seated person may slip when seated.
Japanese Patent Laid-Open No. 10-278640

  In view of the above facts, an object of the present invention is to obtain a seat structure that can reduce the burden of a seating operation and can prevent sliding of a contact portion with a seat cushion at the time of sitting.

  In the invention according to claim 1, the seat cushion for the passenger to sit on, the support means for supporting at least a part of the seat cushion so as to be movable up and down, and the lift when at least a part of the seat cushion is raised. Level maintaining means for maintaining at least a portion of the portion horizontally.

  In this seat structure, at least a part of the seat cushion is supported by the support means so as to be movable up and down. And in a state where a part has been raised, at least a part of this raised part is maintained horizontally by the horizontal maintaining means. Therefore, in the sitting operation, when a part of the body (for example, the buttocks) is brought into contact with the horizontal portion, the contact portion is prevented from slipping. Further, since the horizontal portion is raised (higher), the burden of the seating operation is reduced as compared with a seat structure without this horizontal portion, that is, the raised portion.

  In this way, after bringing a part of the body into contact with the horizontal part, if the lift of the ascending part including the horizontal part is eliminated and lowered, the seat cushion becomes a normal state.

  According to a second aspect of the present invention, in the first aspect of the present invention, the seat cushion is a divided seat cushion divided into a plurality of portions in the vehicle front-rear direction, and the support means supports the seat cushion. Rotating means that allows the front end or rear end of the seat cushion to rotate with respect to the support member, a portion that can be rotated by the rotating means of the seat cushion, and other portions that can be rotated Connecting means for connecting to.

  Accordingly, the support means can be provided with a simple structure in which the front end portion or the rear end portion of the divided seat cushion can be rotated by the rotating means, and the other portions of the seat cushion are rotatably connected by the connecting means. It can comprise and can support a part of seat cushion so that raising / lowering is possible.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, there is provided urging means for urging the seat cushion upward.

  Therefore, in a state where no occupant is seated (no seated person), the seat cushion can be urged upward by the urging means, and at least a part of the seat cushion can be maintained.

  According to a fourth aspect of the invention, there is provided the invention according to the third aspect, further comprising holding means for holding the seat cushion in a lowered position.

  Therefore, by holding the seat cushion by the holding means, it is possible to prevent the seat cushion from being lifted by the biasing means and hold it in the lowered state. If the holding by the holding means is released, the seat cushion can be automatically raised by the urging force of the urging means.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a seated person sensor for detecting presence or absence of a seated person of the seat cushion, a door open sensor for detecting an open state of a vehicle door, and the seated person And a control means for controlling a holding state by the holding means based on a detection result by the sensor and the door opening sensor.

  Thereby, at least a part of the seat cushion can be maintained in a horizontal state at the raised position as necessary, and convenience is improved. For example, if the seating person sensor detects that the seated person is “none” and the door opening sensor detects the door “open” state, the control means releases the holding state by the holding means. At the time of boarding (at the time of sitting), at least a part of the seat cushion is automatically maintained in the horizontal state at the raised position, so that the riding performance is improved.

  In addition, the “horizontal” or “horizontal state” of the seat cushion in the present invention includes those that are completely horizontal, but the level of the seat cushion so that the seated part does not slip inadvertently during the sitting operation. Those that are slanted within the range are also included.

  Since the present invention is configured as described above, it is possible to reduce the burden of the sitting operation and to prevent the sliding portion of the contact portion with the seat cushion at the time of sitting.

  1 and 2 show an automobile seat 12 to which a seat structure 14 according to an embodiment of the present invention is applied. In FIG. 3, the sheet structure 14 is shown partially enlarged.

  As shown in FIGS. 1 and 2, the seat 12 includes a support frame 18 that is fixed to a floor panel 16 of an automobile. On the rear end side of the support frame 18 is formed a seat back support portion 20 that bulges upward in a semicircular shape in a side view. A seat back 24 is attached to the seat back support portion 20 so as to be rotatable in the direction of arrow R1 by a rotation mechanism (not shown).

  The front side of the support frame 18 with respect to the seat back support portion 20 is a substantially flat seat cushion support portion 22. A seat cushion 26 is placed on the seat cushion support portion 22, but the front end of the seat cushion support portion 22 and the front end of the seat cushion 26 are rotatably connected by a hinge 28. That is, the seat cushion 26 rotates in the direction of the arrow R2 and in the opposite direction so that the rear end side rises around the hinge 28. The hinge 28 is provided with a restriction member (not shown), and restricts the rotation of the seat cushion front portion 26F in the direction of the arrow R2 within a predetermined range.

  The seat cushion 26 is divided into two front and rear parts, which are a seat cushion front part 26F and a seat cushion rear part 26R, respectively. The seat cushion front part 26F and the seat cushion rear part 26R are rotatably connected by a hinge 30 attached to these lower sides. Since the hinge 30 is attached to the lower sides of the seat cushion front part 26F and the seat cushion rear part 26R in this way, the seat cushion front part 26F and the seat cushion rear part 26R are substantially straight when viewed from the side. Although it rotates so as to be convex upward at the divided portion (see FIG. 2), the seat cushion front portion 26F and the seat cushion rear portion 26R hit in the opposite direction (direction in which the divided portion protrudes downward). So that it does not rotate.

  Further, as shown in detail in FIG. 3, the rib 30 is provided on the hinge 30. As described above, the rib 32 limits the rotation angle of the relative rotation of the seat cushion front portion 26F and the seat cushion rear portion 26R (rotation such that the divided portion is convex upward) to a predetermined range. This rotational angle limit range is such that when the seat cushion front portion 26F rotates to the maximum in the direction of arrow R2 and the seat cushion rear portion 26R rotates with respect to the seat cushion front portion 26F in the direction of arrow R3, 26R is set to be substantially horizontal.

  A damper 34 is stretched between the seat cushion rear portion 26 </ b> R and the support frame 18. The damper 34 biases the seat cushion rear portion 26R upward, but also has an action of limiting the ascent speed so that the seat cushion rear portion 26R does not rapidly rise due to this biasing force. That is, when the urging force of the damper 34 acts on the seat cushion rear portion 26R, the seat cushion rear portion 26R rises smoothly.

  A striker 36 is attached to the seat cushion rear portion 26R, and an engagement bar 38 corresponding to the striker 36 is provided on the support frame 18. In addition, as shown in FIG. 4, the striker 36 is locked and unlocked by an actuator 40. Furthermore, the actuator 40 is controlled by a control circuit 46 that receives signals from a seat occupant sensor 42 provided on the seat cushion 26 and a door opening sensor 44 provided on a door (not shown) of the vehicle.

  Next, the operation and action of the seat 12 (sheet structure 14) of the present embodiment will be described. In this sheet structure 14, control based on the flow shown in FIG. 5 is performed.

  First, in the normal state, that is, in the state where the seat cushion rear portion 26R is lowered to the lowest position, the engagement bar 38 is engaged with the striker 36 and the seat cushion 26 is locked in step S102. This state is a state in which an occupant can sit and drive on the seat 12, for example. Since the seat cushion 26 is locked, the seat cushion 26 is not inadvertently raised by the urging force of the damper 34.

  Here, in step S104, the control circuit 46 determines whether or not an occupant is seated on the seat 12 based on a signal from the seated person sensor 42. If the user is seated, the process returns to step S102 to keep the seat cushion 26 locked, but if it is determined that the user is not seated, the process proceeds to step S106, and a signal from the door opening sensor 44 is further received. Thus, it is determined whether or not the door is open. If the door is not in the open state, the process returns to step S102, and the state where the seat cushion 26 is continuously locked is maintained. If it is determined that the door is in the open state, the seat cushion 26 is locked in step S108. To release.

  Specifically, the engagement of the engagement bar 38 by the striker 36 is released by driving the actuator 40. Accordingly, the seat cushion rear portion 26R receives the urging force of the damper 34, and the seat cushion front portion 26F rotates in the direction of the arrow R2 around the hinge 28, while the seat cushion rear portion 26R rises smoothly. At this time, the seat cushion rear portion 26R rotates relative to the seat cushion front portion 26F in the arrow R3 direction. In a state where the seat cushion is raised to the top, the rear portion 26R of the seat cushion is substantially horizontal as shown in FIG. 2, and is maintained in this posture.

  As described above, it is assumed that the occupant is not seated on the seat 12 and the door is open because the occupant outside the vehicle is about to get into the car and sit down. The seat cushion rear portion 26R is raised. As a result, as compared with the configuration in which the seat cushion 26 is not raised, a part of the occupant's body (mainly the buttocks) comes into contact with the seat cushion 26 (seat cushion rear portion 26R) at an early stage when sitting, so The burden can be reduced. Moreover, since the seat cushion rear portion 26R is substantially horizontal, it is possible to prevent inadvertent slipping of the contact portion of the body.

  When the occupant brings a part of the body into contact with the seat cushion rear portion 26R and directly applies a load (weight) to the seat cushion rear portion 26R, the seat cushion rear portion 26R descends against the urging force of the damper 34. At this time, the seat cushion front portion 26F also rotates about the hinge 28 and descends. However, since the upward urging force from the damper 34 acts on the seat cushion rear portion 26R even during the lowering, the weight of the occupant is lowered while being supported by the seat cushion 26, and the burden of the seating operation is reduced. The

  The engagement bar 38 is engaged with the striker 36 in a state where the seat cushion front portion 26F and the seat cushion rear portion 26R are in contact with and supported by the support frame 18, and the seat cushion rear portion 26R, that is, the seat cushion 26 is in this state. It is locked with.

  In the above description, the locking and unlocking of the seat cushion 26 are controlled based on the detection results of the seat occupant sensor 42 and the door opening sensor 44. However, the locking of the seat cushion 26 is controlled based on sensors other than these. The lock release may be controlled. Further, the striker 36 may be manually operated without being driven by the actuator 40, and the lock may be released by operating the occupant's lever. Of course, if the control is performed based on the detection results of the seat occupant sensor 42 and the door opening sensor 44 as in the above-described embodiment, the unlocking is automatically performed, which improves convenience.

  In the present invention, the holding means for holding the seat cushion 26 in the lowered position is not limited to the configuration of the striker 36 and the engagement bar 38 described above. In short, it is only necessary to hold (lock) the seat cushion 26 in the lowered position. For example, a manual locking mechanism may be used. Instead of the seat cushion rear portion 26R, the seat cushion front portion 26F may be locked.

  The biasing means for biasing the seat cushion 26 upward is not limited to the above-described damper 34, and may be a spring, for example. However, it is preferable to use the damper 34 as in the above-described embodiment because the rising speed can be limited so that the seat cushion 26 does not rapidly increase. The urging force by the urging means may act on the seat cushion front portion 26F instead of the seat cushion rear portion 26R.

  The horizontal maintaining means for maintaining the seat cushion rear portion 26R in the raised state is not limited to the above configuration, and for example, a link mechanism or the like may be provided between the seat cushion rear portion 26R and the support frame 18. The configuration using the damper 34 and the rib 32 as in the above embodiment is preferable because a simple structure is sufficient.

  In the above description, the seat cushion front portion 26F rotates on the front end side and the seat cushion rear portion 26R is kept horizontal in the raised state. However, the seat cushion front portion 26F and the seat cushion rear portion 26R The reverse operation, that is, a configuration in which the seat cushion rear portion 26R rotates on the rear end side, and the seat cushion front portion 26F connected to the front end of the seat cushion rear portion 26R by a hinge is maintained in a horizontal state in the raised state.

  The seat cushion 26 may be divided not only into the front portion and the rear portion, but also into a larger number of portions. In that case, it is only necessary to maintain the seat cushion 26 in a state where at least a part thereof is raised. Further, the seat cushion 26 may be lifted as a whole without being divided into a plurality of portions and maintained horizontally at the lifted position.

It is a side view which shows the sheet | seat with which the seat structure of one Embodiment of this invention was applied in the fall state of a seat cushion. It is a side view showing the seat to which the seat structure of one embodiment of the present invention was applied in the rising state of a seat cushion. It is a side view which expands partially and shows the sheet | seat to which the sheet | seat structure of one Embodiment of this invention was applied. It is a block diagram of the sheet structure of one embodiment of the present invention. It is a flowchart which shows lock control of the seat cushion in the seat structure of one Embodiment of this invention.

Explanation of symbols

12 Seat 14 Seat structure 16 Floor panel 18 Support frame 20 Seat back support portion 22 Seat cushion support portion 24 Seat back 26 Seat cushion 26F Seat cushion front portion 26R Seat cushion rear portion 28 Hinge (rotating means, support means)
30 Hinge (connection means, support means)
32 ribs (leveling means)
34 Damper (biasing means)
36 striker (holding means)
38 Engagement bar (holding means)
40 Actuator 42 Seated person sensor 44 Door open sensor 46 Control circuit (control means)

Claims (5)

A seat cushion for the passenger to sit on;
Support means for supporting at least a part of the seat cushion so as to be movable up and down;
Level maintaining means for maintaining at least a portion of the raised portion horizontally with at least a portion of the seat cushion raised;
A sheet structure characterized by comprising: The seat cushion is a divided seat cushion divided into a plurality of parts in the vehicle longitudinal direction,
The support means comprises
Rotating means for allowing the front end portion or the rear end portion of the seat cushion to rotate with respect to a support member that supports the seat cushion;
A connecting means for rotatably connecting a portion of the seat cushion that is rotatable by the rotating means and a portion other than the portion;
The sheet structure according to claim 1, comprising: A biasing means for biasing the seat cushion upward;
The sheet structure according to claim 1 or 2, characterized by comprising: Holding means for holding the seat cushion in the lowered position;
The sheet structure according to claim 3, comprising: A seat occupant sensor for detecting the presence or absence of a seat occupant in the seat cushion;
A door open sensor for detecting an open state of a vehicle door;
Control means for controlling a holding state by the holding means based on detection results by the seated person sensor and the door opening sensor;
The sheet structure according to claim 4, comprising:

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