JP2006151169A - Seat device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat device for a vehicle capable of enhancing the safety against collision by precluding the occupant from moving toward behind the vehicle from the seat device even in case a tail-end collision load is applied while the seat is in the reclining condition using ottoman. <P>SOLUTION: A pendulum member 27 moves backward when a tail-end collision load equal to or exceeding a certain level is applied. At this time, a hang-down wire 27a for the pendulum member 27 displaces ratchet teeth backward to release the meshing with the ratchet teeth 29. Thereby the ottoman gear 23 with the rotating angle retained is released and rotates by the own weight of the ottoman, and the ottoman in the horizontal service condition is displaced to the plumb attitude as accommodated condition. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle seat device, and more particularly to a vehicle seat device including an ottoman.

  2. Description of the Related Art Conventionally, it is known that various comfort equipment is installed in a vehicle seat device so that an occupant can spend comfortably indoors.

  For example, as disclosed in Patent Document 1 below, an ottoman on which a foot calf or the like is placed is installed as a comfortable equipment on the front side of the seat device.

  But since such an ottoman protrudes largely in the vehicle front side of a seat device, there is a possibility of deteriorating the collision safety at the time of vehicle front collision.

  Therefore, Patent Document 1 proposes a technique in which an elastic member is provided and an ottoman moves backward to improve shock absorption characteristics when a predetermined load or more is applied from the front side of the vehicle.

JP 2000-157367 A

  By the way, when the ottoman is used, in general, the occupant often tilts the seat back backward to make the body recline.

  However, in such a state, when the vehicle has a rear collision (hereinafter referred to as rear collision), the occupant's body moves to the rear of the vehicle because the occupant's back is in contact with the slanted seat back, unlike normal times. The problem that it ends up occurs.

  In other words, when the occupant puts the seat device in a reclining state (use of an ottoman and tilts backwards from the seat back), the occupant's posture is similar to the state of lying on his / her back on the seat device. In this case, the occupant's body moves from the seat device to the vehicle rear side.

  Therefore, the present invention improves the collision safety in the vehicle seat device by preventing the occupant from moving from the seat device to the vehicle rear side even when receiving a rear impact load in the reclining state when the ottoman is used. An object of the present invention is to provide a vehicle seat device that can perform the above-described operation.

  The vehicle seat device according to the present invention includes a reclining mechanism for freely changing the inclination angle of the seat back, an ottoman installed on the vehicle front side of the seat cushion, and an inclination angle adjusting means capable of adjusting the inclination angle of the ottoman. A reclining state in which a rear collision determination means for detecting or predicting a rear collision of the vehicle and a reclining mechanism section in which the seat back is tilted backward at least a predetermined angle from the vertical. When the rear collision detection unit determines that the rear collision has occurred when the tilt angle adjustment unit is in an ottoman usage state in which the ottoman is tilted to the horizontal direction at a predetermined angle or more from the vertical, And an angular displacement mechanism for displacing the inclination angle from the horizontal side to the vertical side.

  According to the above configuration, when the rear collision detection unit detects or predicts a rear collision of the vehicle and the subsequent collision determination is made, if the seat back is in the reclining state and the ottoman is in the ottoman use state, the angular displacement By the mechanism part, the tilt angle of the ottoman is displaced from the horizontal side to the vertical side.

  That is, when the seatback is in the reclining state and the ottoman is in use, when the rear collision occurs, the tilt angle of the ottoman is displaced from the horizontal side to the vertical side.

  For this reason, at the time of a rear collision, the calf of the occupant's feet (the part below the knee) follows the ottoman and bends downward in front of the seat cushion, and the calf is caught by the seat cushion and moves toward the rear of the occupant's vehicle. Movement is less likely to occur.

  In addition, since it is desirable for the rear collision determination means to operate the angular displacement mechanism portion as soon as possible in order to restrict the rearward movement of the occupant, it is preferable to be able to determine the rear collision at the stage of collision prediction. However, as long as it is possible to restrict the rearward movement of the occupant as a result, when the angular displacement mechanism unit operates immediately after the collision, the collision determination may be performed at the time of the collision.

  In addition, the angular displacement mechanism is also mechanically or electrically forcibly displacing the ottoman's tilt angle, one that spontaneously falls by its own weight or the like to displace the tilt angle, and further, a tensioner mechanism using explosives. For example, the inclination angle may be changed more forcibly.

  Further, the displacement amount of the tilt angle of the ottoman is not particularly limited as long as it is displaced from the horizontal side to the vertical side.

  The predetermined angle in the reclining state of the seat back described above is set as, for example, 30 degrees (however, the vertical plane is 0 degree), and the predetermined angle in the ottoman usage state is set as, for example, 45 degrees. It is possible. By displacing the seat back and the ottoman more than such an angle, the occupant's posture becomes a posture that is more like lying on the back on the seat device, and it becomes easier to move backwards at the time of a rear collision, and the effect of the present invention is further improved. It is because it becomes easy to enjoy a lot.

  In one embodiment of the present invention, the seat cushion includes a cushion position changing mechanism that changes the tilt angle of the seat cushion by displacing the front end of the seat cushion above the rear end, and the reclining state and the ottoman use state. Thus, when the front end portion of the seat cushion is displaced above the rear end portion by the cushion position changing mechanism portion, the angular displacement mechanism portion is operated.

  According to the above configuration, in the reclining state and the ottoman use state, the front end portion of the seat cushion is displaced above the rear end portion (hereinafter, tilted up) by the cushion position changing mechanism portion, for example, the tilt up mechanism portion, In the case of this tilted up state, the angular displacement mechanism unit is operated.

  When the seat cushion is tilted up, the thigh part of the occupant is positioned upward, and in the case of a rear-end collision, the thigh part may rotate backward about the base of the foot, and the heel may interfere with the tip of the ottoman. Occurs. However, since the angular displacement mechanism portion operates, the tilt angle of the ottoman is displaced to the vertical side, and interference between the tip portion of the ottoman and the heel can be prevented.

  Therefore, it is possible to prevent the ottoman's leading end portion and the heel from interfering with each other and to protect the heel at the time of rear collision.

  In an embodiment of the present invention, when the seat back is in a reclining state, the ottoman is in an ottoman use state, and the rear collision determination unit determines a rear collision, the reclining mechanism unit tilts the seat back. The angle is displaced from the horizontal side to the vertical side.

  According to the above configuration, when the rear collision is determined when the seat back is in the reclining state and the ottoman is in the ottoman use state, the inclination angle of the seat back is displaced from the horizontal side to the vertical side by the reclining mechanism unit. become.

  For this reason, at the time of a rear collision, the seat back rises and the occupant's back comes into contact with the seat back, so that the occupant is less likely to move to the rear side of the vehicle in addition to being caught on the seat cushion.

  Therefore, in addition to the catch of the calf, the rearward movement of the occupant can be more reliably prevented by the contact of the occupant's back with the seat back.

  In one embodiment of the present invention, the rear collision determination means is constituted by a displacement member that swings and displaces due to a collision load, and the angular displacement mechanism portion holds the tilt angle of the ottoman by swinging the displacement member. It is composed of an inclination angle release mechanism that releases

  According to the above configuration, the displacement member that swings and displaces due to the collision load constitutes the rear collision determination unit, and the tilt angle release mechanism that releases the holding of the tilt angle of the ottoman by the swing of the displacement member includes the angular displacement mechanism unit. Will be configured.

  For this reason, since the rear impact determination means and the angular displacement mechanism can be configured with a simple mechanical structure, the reliability of the operation at the time of the rear impact can be improved as compared with the electrical mechanism.

  Therefore, the reliability of the operation at the time of rear collision can be improved.

  Note that the tilt angle release mechanism may use a ratchet mechanism or may simply have a structure for releasing the engagement. Furthermore, it is possible to release the holding of the ottoman's inclination angle by using a spring member or the like, and any one that releases the holding of the ottoman's inclination angle mechanically is included.

  According to this invention, when the seatback is in the reclining state and the ottoman is in use, when the rear collision occurs, the inclination angle of the ottoman is displaced from the horizontal side to the vertical side.

  For this reason, at the time of a rear collision, the occupant's calf follows the ottoman and bends downward in front of the seat cushion, and the calf is caught by the seat cushion, and the occupant is less likely to move to the rear side of the vehicle.

  Therefore, in the vehicle seat device, when a rear impact load is received in the reclining state when the ottoman is used, the occupant does not move from the seat device to the vehicle rear side, so that collision safety can be improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the overall structure of the vehicle seat device of the first embodiment will be described with reference to FIGS. 1 is a transparent perspective view illustrating the lower part of the sheet device, FIG. 2 is a transparent side view illustrating the internal structure of the sheet device, FIG. 3 is a transparent side view illustrating the operating state of the internal structure, and FIG. FIG. 5 is a plan view mainly showing the internal structure of the ottoman mechanism. In addition, this 1st embodiment is an example of embodiment which mechanically displaces the inclination angle of an ottoman.

  The seat device 1 of the present embodiment includes a substantially rectangular seat cushion 11 that forms a seat seat surface, and a seat back 12 that forms a seat back, and includes an ottoman 2 on the vehicle front side of the seat cushion 11.

  The seat cushion 11 is installed on a seat slider mechanism 13 so as to be slidable in the vehicle front-rear direction, and includes two seat cushion frames 31, 31 extending in the vehicle front-rear direction on both sides, Two cross frames 32, 32 that extend in the vehicle width direction at the front end and the rear end and connect the two seat cushion frames 31, 31 are provided. The seat cushion frames 31, 31 and the cross frames 32, 32 constitute a skeleton of the seat cushion 11.

  The seat slider mechanism 13 includes two slide rails 15 and 15 extending in the vehicle front-rear direction on both sides of the lower portion of the seat cushion 11, and two slide rails 15 and 15 slidably fitted to the slide rails 15 and 15 and extending in the vehicle front-rear direction. The base frame 16, 16 and the cross member 17 that connects the two base frames 16, 16 extending in the vehicle width direction are configured, and the seat slider mechanism 13 is configured by the front ends of the two slide rails 15, 15. And it is firmly fixed to the passenger compartment floor F by four fixing brackets 18 provided at the rear end.

  The seat slider mechanism 13 is configured such that the position of the base frame 16 is locked and fixed to the slide rail 15 by an engagement mechanism (not shown) to fix the front and rear positions of the seat cushion 11.

  The seat back 12 is supported by the lower end of the seat cushion 11 at the rear end of the seat cushion 11 so as to be able to recline, and has a predetermined inclination angle α (approximately 20 degrees from the vertical to the rear side) in the vertical direction. Standing up.

  The ottoman 2 is formed of a rectangular flat plate member made of PP (polypropylene resin), and the tilt angle β can be freely displaced from the vertical direction to the horizontal direction around the upper end portion by an ottoman mechanism 20 described later. It is configured.

Next, the tilt-up mechanism 40 that moves the front end of the seat cushion 11 up and down will be described.
The tilt-up mechanism 40 is configured by assembling a plurality of components to the above-described seat cushion frames 31 and 31.

  The seat cushion frames 31, 31 are pivotally attached to the base frames 16, 16 at the front end via the front link member 41 and pivoted at the rear end via the rear link member 42. 16 and 16 are fixed so as to be swingable. The seat cushion 11 is tilted up (the front end portion of the seat cushion 11 is displaced above the rear end portion) by moving the front end portions of the seat cushion frames 31 and 31 up and down relative to the base frames 16 and 16. Or tilt down.

  An operation lever 43 that is operated by an occupant is provided at a lateral outer end of the seat cushion frame 31. The operation lever 43 is connected to the tilt gear 44 via a rotation shaft 43a extending in the vehicle width direction. Therefore, the operation force from the operation lever 43 is transmitted into the tilt up mechanism 40 by the tilt gear 44.

  The tilt gear 44 meshes with a first idle gear 45 disposed in front of the tilt gear 44, and the first idle gear 45 meshes with a second idle gear 46 disposed further in front of the tilt gear 44. The second idle gear 46 meshes with rack teeth 41 a formed on the front link member 41. In this way, the operating force from the tilt gear 44 is transmitted to the front link member 41 by the meshing of a series of gears.

  Each gear is supported at both ends by a seat cushion frame 31 and a support frame 34 via a rotation shaft extending in the vehicle width direction, and is firmly fixed to the seat cushion 11.

  On the other hand, the front link member 41 to which the operating force is transmitted has an elongated hole in which a lower pivot point 41b is pivotally attached to the base frame 16 and a central pin portion 41c is formed in the vehicle front-rear direction of the seat cushion frame 31. It is fixedly engaged with 31a. As a result, the front link member 41 receives a force drawn from the rack teeth 41a toward the vehicle rear side, thereby rotating upward about the lower pivot point 41b and simultaneously moving the front end portion of the seat cushion 11 to the front link member 41. , Move up.

  Thus, in the tilt-up mechanism 40, as shown in FIG. 3, when the occupant pulls up the operation lever 43, the tilt gear 44 rotates clockwise, and then the first idle gear 45 and the second idle gear 46 are turned on. Are rotated counterclockwise and clockwise, respectively, so that the operation force from the tilt gear 44 is transmitted as a force for pulling the front link member 41 rearward. For this reason, the front end portion of the seat cushion frame 31 rises as shown in FIG.

  Further, since the front link member 41 is biased downward by a biasing means 47 such as a spring member, the rack teeth 41 a are always meshed with the second idle gear 46. For this reason, the vertical position of the front end portion of the seat cushion 11 can be stabilized.

  Further, the ratchet mechanism 48 is engaged with the tilt gear 44 so that the position (rotation angle) of the tilt gear 44 is maintained. For this reason, even when the occupant releases his hand from the operation lever 43, the tilt-up position of the seat cushion 11 is maintained.

  As described above, the tilt-up mechanism 40 of the present embodiment is configured such that the seat cushion 11 can be tilted up and down by manual operation by the operation lever 43.

  Next, the ottoman mechanism 20 that displaces the ottoman 2 on which the calf is placed in the vertical direction will be described.

  As described above, the ottoman 2 is installed on the vehicle front side of the seat cushion 11 and is folded in a vertical position along the front end surface of the seat cushion 11 when not in use. A substantially rectangular plate-like base body 21 is provided on the back side of the ottoman 2.

  The base body 21 has two elongated holes 21a for locking the two boss portions 24 extending from the ottoman 2, and the boss portion 24 is slid and supported by the elongated holes 21a. Supports freely.

  The upper end of the base body 21 is fixed to a base gear 22 having a rotation shaft in the vehicle width direction. Therefore, the base body is configured to be displaced according to the rotation of the base gear 22. The base gear 22 is formed of a cylindrical gear extending in the vehicle width direction, and is installed at the upper front end in the seat cushion 11.

  An ottoman gear 23 that meshes with the base gear 22 is provided on the rear side of the base gear 22. The Ottoman gear 23 is also a cylindrical gear having a rotation shaft in the vehicle width direction. Thus, the ottoman 2 is finally swung according to the rotation of the ottoman gear 23.

  On both side portions of the ottoman gear 23, pulley portions 23a having a smooth surface are formed. The pulley portion 23 a is set to wind up the wire member 25 that is locked and fixed to the boss portion 24 of the ottoman 2, and the other end of the wire member 25 is locked and fixed.

  This wire member 25 is provided so that the ottoman 2 protrudes farther toward the vehicle front side than the base body 21 when the ottoman 2 is in use.

  In addition, a pendulum member 27 is provided on the rotating shaft of the ottoman gear 23 via an arm member 26 extending to the rear side of the vehicle. The pendulum member 27 is composed of a metal cylindrical weight member 27a and a suspension wire 27b. As will be described later, the pendulum member 27 is configured to swing to the rear side of the vehicle when a rear collision of the vehicle is detected. ing.

  Further, a ratchet gear 28 is provided on the side of the arm member 26, and is configured to hold the rotation angle of the ottoman gear 23 by meshing with a leaf spring ratchet tooth 29 provided behind the arm member 26. Yes.

  Thus, by holding the rotation angle of the ottoman gear 23 with the ratchet gear 28 and the leaf spring ratchet teeth 29, the inclination angle (swing position) of the ottoman 2 is maintained. Therefore, when the inclination angle of the ottoman 2 is displaced, it is necessary to rotate the ottoman 2 against the holding force of the ratchet gear 28 and the leaf spring ratchet teeth 29. By manually turning, the tilt angle of the ottoman 2 is displaced against this holding force.

  However, a separate operation lever 43 may be provided to displace the tilt angle of the ottoman 2.

  Thus, the ottoman mechanism 20 of the present embodiment is configured to displace the inclination angle β of the ottoman 2 by manual operation.

  The rotation hinge 33 of the seat back 12 is also provided with a well-known reclining mechanism 50 (not shown) so that the predetermined inclination angle α of the seat back 12 can be freely changed by the operation of the occupant. It is composed.

  For example, the seat back 12 is configured to be in a reclining state by inclining (backward tilting) the seat back 12 backward 30 degrees or more from the vertical position.

  The operation of the seat device 1 configured as described above will be described with reference to FIGS. In addition, M is a passenger | crew, S is a seat belt, About the other component, the above-mentioned code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 6A shows the seat apparatus 1 in a reclining state. The ottoman 2 has an inclination angle of 30 degrees or more and the ottoman 2 has an inclination angle of 45 degrees or more from the vertical position. It is a figure which shows the state of the sheet | seat apparatus 1 made into the use state.

  In this state, the posture of the occupant M becomes a posture close to the state of lying on the back on the seat device 1, and the occupant M can rest the body with the seat device 1.

  However, if a rear impact load is input from the rear of the vehicle in this state, the occupant M is not easily restrained by the seat back 12, and therefore, the occupant M easily moves toward the rear of the vehicle. Since force hardly acts, it is conceivable that the occupant M cannot move to the rear side of the vehicle and maintain higher safety.

  Therefore, in the case of the seat device 1 of the present embodiment, as shown in FIG. 5B, the inclination angle of the ottoman 2 is displaced from the substantially horizontal direction in the use state to the vertical direction in the retracted state as shown in FIG.

  For this reason, the calf portion of the occupant M follows the ottoman 2 and bends to the front end surface side of the seat cushion 11, and the calf portion is caught by the seat cushion 11.

  Therefore, even if the posture of the occupant M is close to the state of lying on the back on the seat device 1, the occupant M is less likely to move backward at the time of a rear collision, and collision safety can be ensured.

  The inclination angle of the ottoman 2 is displaced from the substantially horizontal direction to the vertical direction due to the action of the pendulum member 27, the ratchet gear 28, and the leaf spring ratchet teeth 29 described above.

  That is, as shown in FIG. 7, when a rear impact load exceeding a predetermined value is received, the pendulum member 27 as a displacement member moves rearward. At this time, the suspension wire 27a of the pendulum member 27 displaces the leaf spring ratchet teeth 29 rearward to release the meshing with the ratchet gear 28 (dashed line).

  As a result, the holding of the rotation angle of the ottoman gear 23 is released, and the ottoman gear 23 is rotated by its own weight to displace the ottoman 2 from the substantially horizontal direction in the use state to the vertical direction in the retracted state.

  Since the ottoman gear 23 is held by the leaf spring member in this way, in this embodiment, the release degree is changed according to the rear impact load. That is, when a large rear impact load is received, the leaf spring ratchet teeth 29 are largely displaced rearward, and the ottoman 2 is greatly displaced until the retracted state. When a small rear impact load is received, The leaf spring ratchet teeth 29 are slightly displaced backward to prevent the ottoman 2 from being displaced so much.

  Therefore, in this embodiment, the amount of displacement of the ottoman 2 can be changed according to the degree of collision by holding the ottoman gear 23 with the leaf spring member.

  In this embodiment, the rear collision is determined by the pendulum member 27 serving as a displacement unit, and the rotation angle of the ottoman 2 is released by releasing the meshing between the leaf spring ratchet teeth 29 and the ratchet gear 28. For this reason, with a mechanically simple structure, the displacement of the ottoman 2 at the time of a rear collision can be produced, and the reliability of operation | movement can be improved rather than an electrical mechanism. In addition, since no sensor or the like is required, the production cost can be reduced.

  Note that the opening angle of the ottoman 2 may be opened simply by releasing the locking structure. In this case, the structure can be further simplified. Moreover, you may employ | adopt the structure which pulls the ottoman 2 downward using a spring member etc. In this case, the ottoman 2 can be displaced more reliably.

  As described above, in this embodiment, even if the posture of the occupant M is a posture close to the state of lying on the back on the seat device 1, the inclination angle of the ottoman 2 is changed from the horizontal side to the vertical side at the time of the rear collision. Due to the displacement, the rearward movement of the occupant M hardly occurs at the time of a rear collision, and the collision safety can be ensured.

  In the present embodiment, the reclining state of the seat back 12 is not detected, and the inclination angle of the ottoman 2 is displaced regardless of the presence or absence of the reclining state of the seat back 12, but the reclining of the seat back 12 is performed. When the seat back 12 is not in a state, the problem of the rearward movement of the occupant M at the time of the rear impact does not occur. Therefore, when the seat back 12 is not reclining, the configuration in which the tilt angle of the ottoman 2 is not displaced is adopted. May be.

  Next, a second embodiment will be described with reference to FIG. In this embodiment, in addition to the state where the ottoman 2 is in use and the seat back 12 is in a reclining state, the safety of a collision at the time of a rear collision in a state where the seat cushion 11 is tilted up is enhanced. In addition, about the component similar to 1st embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  (A) shows the seat device 1 in the ottoman use, the reclining state, and the tilt-up state.

  As shown in this figure, in the second embodiment, as in the first embodiment, the posture of the occupant M is substantially horizontal on the seat device 1. In the second embodiment, in addition to this, the seat cushion 11 is tilted up, so the thigh portion of the occupant M is positioned above the first embodiment.

  For this reason, at the time of a rear collision, in the same way as in the first embodiment, in addition to the problem that the occupant M moves to the vehicle rear side, the thigh portion rotates to the vehicle rear side around the base of the foot, and A new problem of interference with the tip 2a of the ottoman 2 occurs (see broken line).

  That is, since the front end portion of the seat cushion 11 is positioned upward by the tilt-up mechanism 40, there is a possibility that the thigh portion may rotate backward separately from the upper body, and the heel is caught on the front end portion 2 a of the ottoman 2. Problems specific to the two embodiments arise.

  Therefore, in the case of the seat device 1 of the present embodiment, as shown in (b) at the time of a rear collision, the inclination angle of the ottoman 2 is displaced from the substantially horizontal position in the use state to the vertical position in the storage state.

  For this reason, since the front-end | tip part 2a of the ottoman 2 moves below, interference with a collar and the ottoman 2 can be avoided.

  In addition, about the structure which displaces the inclination-angle of the ottoman 2, it is the same as that of 1st embodiment.

  Thus, in this embodiment, even in the tilt-up state, a new effect of protecting the heel can be further obtained by displacing the position of the ottoman 2 at the time of a rear collision. Other effects are the same as those of the above-described embodiment.

  In addition, in order to protect the wrinkles, the shape and hardness of the tip 2a of the ottoman 2 may be configured with a curved surface or be flexible so that no problem occurs even if the wrinkles interfere.

  Next, a third embodiment will be described with reference to FIGS. In this embodiment, not only the ottoman 2 but also the seat back 12 is configured to displace the inclination angle in the vertical direction at the time of a rear collision, thereby further improving the collision safety. In this embodiment, unlike the above-described embodiment, the inclination angle of the seat back 12 and the ottoman 2 is electrically displaced. In addition, the same constituent elements as those of the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 9 shows a system block diagram of the third embodiment. In this embodiment, a CPU (central processing unit) 60 is provided as a control unit that controls the operation of each mechanism of the seat device 1, and a rear collision sensor 61 that predicts a rear collision as an input unit to the CPU 60. A reclining sensor 62 that detects the reclining state of the seat back 12, an ottoman sensor 63 that detects the usage state of the ottoman 2, a tilt-up sensor 64 that detects the tilt-up state of the seat cushion 11, and the seat device 1. A weight sensor 65 is connected to detect the weight of the occupant or the like.

  Further, as an output means, a reclining mechanism 150 that displaces the inclination angle of the seat back 12, an ottoman mechanism 120 that displaces the inclination angle of the ottoman 2, and a tilt-up mechanism 140 that moves the front end portion of the seat cushion 11 up and down are CPU 60. It is linked to.

The configuration of this system block is controlled by the control flow shown in FIG.
First, in S <b> 1, various data of each input unit described above is read into the CPU 60.

  Next, it is judged whether it is more than predetermined weight by S2. When the weight is not equal to or greater than the predetermined weight (NO), for example, when the occupant is not seated on the seat device 1 or when an infant is seated, the control is useless or the seat back 12 or the like is tilted. If the angle is displaced, the safety may be adversely affected. Therefore, the following control is not performed and the process returns to return.

  Next, in S3, it is determined whether the seat back 12 is in the reclining state. If it is not in the reclining state (NO), it is useless to perform the control, so the following control is not performed and the process directly returns.

  In step S4, it is determined whether or not a rear-end collision is predicted. In this prediction, the distance between the following vehicle and the following vehicle is detected by a radar sensor or the like, and this distance is determined according to the degree of change. Thereby, for example, when it is determined that there is a high possibility that a collision will occur after 1 to 3 seconds, a prediction of a collision is determined. When the rear collision prediction is determined (YES), the following control is performed in advance before the rear collision. By performing control in advance in this way, the collision safety can be further improved.

  However, if the collision prediction is not determined (NO), the process proceeds to return and the next control is ready.

  If it is determined in S4 that the rear collision is predicted, the process proceeds to S5 and the reclining state of the seat back 12 is released. That is, the seat back 12 is displaced to a normal inclination angle (about 20 degrees from the vertical). By controlling in this way, the back of the occupant M can be restrained by the seat back 12, and the occupant's rearward movement of the occupant during a rear-end collision can be reliably suppressed.

  In S6, the ottoman 2 is released from use. Also in this case, since the inclination angle of the ottoman 2 is displaced in the retracted vertical direction, the occupant's calf is caught on the front end portion of the seat cushion 11. For this reason, since a calf is also restrained by the seat apparatus 1, a passenger | crew's vehicle rearward movement is prevented more.

  With the above control flow, the seat device 1 of the present embodiment is controlled, and the occupant can be reliably prevented from moving backward.

  FIG. 11 shows the operating state of the seat device 1 of the present embodiment. FIG. 11A shows the seat device 1 in the ottoman use, reclining state, and tilt-up state.

  In this state, as described above, the posture of the occupant M is close to the state of lying on his back on the seat cushion 11, and when the rear impact load is received in this state, the occupant M moves toward the rear side of the vehicle. There is a risk of movement.

  Therefore, when the reclining of the seat back 12 is canceled and the ottoman 2 is released at the time of a collision prediction as in the present embodiment, the back of the occupant M is restrained by the seat cushion 11 and the calf is also slid as shown in (b). The front end surface of the seat cushion 11 is restrained. For this reason, even if it receives a rear-end collision load after that, the passenger | crew M does not move to the vehicle rear side.

  Therefore, in the present embodiment, by displacing the inclination angles of the ottoman 2 and the seat back 12 in the vertical direction, the rearward movement of the occupant M at the time of the rear collision can be more reliably suppressed.

  In the present embodiment, the rear collision sensor 61 is configured to predict a rear collision, but is not limited thereto, and may be configured to determine a rear collision for the first time at the actual rear collision. .

  Further, the control amount may be varied according to the tilt-up state of the seat cushion 11.

  Further, the ottoman 2 is configured to be mechanically displaced as in the first embodiment, the seatback 12 is configured to be electrically displaced, and an electrical mechanism and a mechanical mechanism are used. You may make it prevent the back movement at the time of the rear collision of the passenger | crew M. FIG.

  In this case, it is possible to displace the seat back in advance before the rear collision while improving the reliability of the operation.

  In addition, a tensioner device that operates with gunpowder or the like may be provided to force the displacement. In the first embodiment and the second embodiment, only an electric mechanism as in the third embodiment may be used.

As described above, in the correspondence between the configuration of the present invention and the above-described embodiment,
The tilt angle adjusting means of the present invention corresponds to the ottoman mechanism 20 of the embodiment,
Similarly,
The rear collision determination means corresponds to the pendulum member 27 and the rear collision sensor 61,
The angular displacement mechanism corresponds to the ratchet gear 28 and the leaf spring ratchet teeth 29,
The cushion position changing mechanism corresponds to the tilt-up mechanisms 40 and 140,
The reclining mechanism section corresponds to the reclining mechanisms 50 and 150,
The tilt angle release mechanism corresponds to the ratchet gear 28 and the leaf spring ratchet teeth 29. However, the present invention is not limited to the configuration of the above-described embodiment, and an embodiment applied to all vehicle seat devices. Is included.

The permeation | transmission perspective view of the lower part of the sheet | seat apparatus of 1st embodiment. The permeation | transmission side view explaining the internal structure of a sheet | seat apparatus. The permeation | transmission side view explaining the action | operation state of an internal structure. The top view which mainly showed the internal structure of the tilt up mechanism. The top view which mainly showed the internal structure of the ottoman mechanism. The side view which shows the (a) reclining state (b) operation state of a sheet | seat apparatus. The detailed top view of the internal structure of an ottoman mechanism. The side view which shows the (a) reclining state (b) operation state of 2nd embodiment. The system block diagram of 3rd embodiment. The control flowchart of 3rd embodiment. The side view which shows the (a) reclining state (b) operation state of 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Seat apparatus 11 ... Seat cushion 12 ... Seat back 2 ... Ottoman 20, 120 ... Ottoman mechanism (tilt angle adjustment means)
27 ... Pendulum member (rear collision determination means)
28 ... Ratchet gear (angular displacement mechanism)
29 ... Leaf spring ratchet teeth (angular displacement mechanism)
40, 140 ... Tilt-up mechanism (cushion position changing mechanism)
50, 150 ... Reclining mechanism (reclining mechanism part)

Claims (4)

A vehicle seat device comprising: a reclining mechanism for freely changing the inclination angle of a seat back; an ottoman installed on the vehicle front side of a seat cushion; and an inclination angle adjusting means capable of adjusting the inclination angle of the ottoman. There,
Rear collision determination means for detecting or predicting a rear collision of the vehicle;
Use of an ottoman in which the reclining mechanism portion is in a reclining state in which the seat back is inclined backward at least a predetermined angle from the vertical, and the ottoman is inclined to the horizontal side from the vertical by a predetermined angle or more by the inclination angle adjusting means A vehicle seat device comprising an angular displacement mechanism that displaces the tilt angle of the ottoman from the horizontal side to the vertical side when the rear collision determination unit determines a rear collision in the state. A cushion position changing mechanism for changing the inclination angle of the seat cushion by displacing the height of the front end portion of the seat cushion above the height of the rear end portion;
The angle displacement mechanism is operated when the front end of the seat cushion is displaced above the rear end by the cushion position changing mechanism in the reclining state and the ottoman use state. The vehicle seat device according to 1. When the seat back is in the reclining state, the ottoman is in the ottoman use state, and the rear collision determination means determines a rear collision, the reclining mechanism section displaces the inclination angle of the seat back from the horizontal side to the vertical side. The vehicle seat device according to claim 2 to be made. The rear collision determination means is composed of a displacement member that swings and displaces due to a collision load,
The vehicle seat device according to any one of claims 1 to 3, wherein the angular displacement mechanism portion is constituted by an inclination angle release mechanism that releases the holding of the inclination angle of the ottoman by swinging the displacement member.

Images