JP3446738B2 - Vehicle seat - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat body, an elevating mechanism for moving the seat body up and down while moving the seat body in the front-back direction, and rotating the elevating mechanism and the seat body integrally. The present invention relates to a vehicle seat that includes a direction changing mechanism that changes the direction of a seat body, and relates to a vehicle seat that allows, for example, an elderly person or a physically handicapped person (seat) to easily get in and out of a vehicle.

[0002]

2. Description of the Related Art A general vehicle seat of this type is shown in FIG.
And shown in FIG. The vehicle seat 80 includes a main base 83 configured to be slidable forward and backward, and a rotation mechanism 84 is installed on the main base 83. A swing base 87 is installed on the rotating mechanism 84, and a frame 89 of a seat body 81 is attached to the swing base 87 via a pair of left and right four-bar link mechanisms 88. With this structure, the seat body 81 is rotated about 90 ° to the left by the rotating mechanism 84, for example, toward the door opening side from the vehicle front side, and the electric cylinder (not shown) is operated to operate the four-bar linkage 88. If the seat body 81 is tilted to the outdoor side, the seat body 81 can be swung out to the outside through the door opening. In addition, the seat body 81 located outside the room is returned to the passenger compartment by the four-bar linkage 88, and the rotating mechanism 8
The seat body 81 is turned to the front of the vehicle by rotating it by 90 ° to the right at 4 (hereinafter referred to as the original position).
Can be brought back up.

As shown in FIG. 13B, a swing lock mechanism 90 is provided between the frame 89 of the seat body 81 and the swing base 87. The swing lock mechanism 90 is a mechanism for locking the seat body 81 in the original position, and is fixed to the hook 92 fixed to the frame 89, the lock holder 94 attached to the swing base 87 so as to be vertically rotatable, and the main base 83. And an anchor hook 95 that is formed.

When the seat body 81 returned to the passenger compartment by the four-bar linkage 88 is turned toward the door opening side by the rotation mechanism 84, the seat holder 81 is rotated to its original position, as shown in FIG. The lower end of 94 abuts the anchor hook 95. When the seat body 81 further rotates from this state to the original position, the anchor hook 95 pushes the lower end portion of the lock holder 94 in the horizontal direction, and the lock holder 94 rotates rightward in the figure about the rotation shaft 94p (rotates upward). ) Do. As a result, the lock pin 94r of the lock holder 94 engages with the hook 92 fixed to the frame 89 from a substantially horizontal front side, and the frame 89 and the swing base 8 are engaged.
The seat body 81 is locked in its original position by being connected to the seat body 81.

[0005]

However, the swing lock mechanism 90 of the vehicle seat 80 has the frame 8
Since the lock pin 94r of the lock holder 94 is engaged with the hook 92 of 9 from substantially horizontal front (FIG. 14).
), For example, when the vehicle is collided from behind and the seat body 8
When the vehicle 1 moves rearward with respect to the vehicle, the hook 92 and the lock pin 94r may be disengaged from each other, and the seat body 81 and the like may be separated from the vehicle. The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat including an impact lock mechanism having a structure in which the lock is hard to be disengaged when the vehicle is traveling.

[0006]

The above-mentioned problems can be solved by the inventions of the respective claims. The invention of claim 1 is directed to a seat body, an elevating mechanism for elevating the seat body while moving the seat body in the front-back direction, and an orientation of the seat body by integrally rotating the elevating mechanism and the seat body. A vehicle seat having a direction changing mechanism for changing the vehicle seat, the seat body being lowered to a seating position in the passenger compartment by the elevating mechanism, and when the vehicle is impacted. It is characterized by having an impact lock mechanism for connecting the main body and the vehicle so that they cannot move relative to each other.

According to the present invention, when a shock is applied to the vehicle when the seat body is lowered to the seating position in the passenger compartment by the elevating mechanism, that is, when the occupant is seated on the seat body while the vehicle is traveling, The shock lock mechanism works to lock the seat body and the vehicle so that they cannot move relative to each other. Therefore, for example, even if the vehicle is rear-end collided while the vehicle is running and the seat body tries to move rearward with respect to the vehicle, the impact lock mechanism does not cause the seat body to be separated from the vehicle.

According to a second aspect of the present invention, the impact lock mechanism includes an engaged member provided on the seat body, an engaging member provided on the vehicle side, and the gravity of the seat body lowered to the sitting position. When the seat main body is lowered to the seating position, the impact lock mechanism can be surely secured by configuring the engagement holding mechanism that holds the engaged member and the engaged member in the engaged state while receiving the seat. Can be worked on. According to a third aspect of the present invention, the engaged member has a front-collision portion with which the engaging member abuts when the seat body is about to move forward with respect to the vehicle.
By forming a rear collision portion with which the engaging member abuts when the seat body tries to move rearward with respect to the vehicle, the pair of impact lock mechanisms separates the seat body against a shock from the front-rear direction. It can be prevented.

Further, when the seat body descends to the seating position along a predetermined locus and the seat body rises from the seating position along a predetermined locus, the engaged member is The engagement holding mechanism according to claim 2 is unnecessary if the engaged member and the engaging member are engaged when the seat body moves out of the locus without engaging with the engaging member. become.

Further, according to a fifth aspect of the present invention, the engaging member provided on the vehicle side has a tubular portion, and the engaged member provided on the seat body has a hook shape due to the vertical portion and the horizontal portion. And a lateral portion thereof is inserted into the tubular portion of the engaging member, and a claw is formed at the tip of the lateral portion protruding from the tubular portion. When the seat body tries to move in the direction of pulling out the lateral portion of the engaged member from the shape portion, it is preferable that the claw of the engaged member engages with the engaging member. If the tubular portion of the engaging member is formed in a tapered tubular shape and the lateral portion of the engaged member is formed in a tapered shape so that the tubular portion can be fitted to the tubular portion, It is possible to suppress play in the fitted state between the tubular portion of the engaging member and the lateral portion of the engaged member.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) Hereinafter, a vehicle seat according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 10. 1 to 3 show a vehicle seat 1 according to this embodiment. In the following description, the vehicle width direction is the X direction, the vehicle front-back direction is the Y direction, and the vehicle height direction is the Z direction. The vehicle seat 1 is a seat used as a driver's seat, and a seat device 10 mainly including a seat body 11 (hereinafter referred to as a seat body 10).
And an outdoor moving device 50 installed in the passenger compartment for moving the seat body 10 from the passenger compartment to the outside of the passenger compartment or vice versa, and between the seat body 10 between the rear seat position and the driver's seat position. A long slide device 20 for moving (long slide) a relatively long distance is provided. 2 and 3, the seat body 10 located at the rear seat position is shown by a solid line, and the seat body 10 located at the driver seat position is shown by a chain double-dashed line. In the case of this embodiment, the seat body 10
Is the outdoor moving device 5 through the right side door opening D2 for the rear seats.
0 moves between the vehicle interior and the vehicle exterior.

The seat body 10 has foldable wheels (not shown in the figure) and can be separated from the outdoor moving device 50. By connecting the seat body 10 to the outdoor moving device 50 and operating the outdoor moving device 50, the seat body 10 can be moved from the vehicle interior to the vehicle exterior and vice versa.
By moving into the passenger compartment, the seat body 10 is used as a driver's seat for a normal driver to sit in, while it is moved to the outside of the passenger compartment to be disconnected from the outdoor moving device 50 and the wheels can be taken out to independently operate as a wheelchair. Can be used.

FIG. 4 is a perspective view of the outdoor moving device 50 (the seat body 10 is omitted). The outdoor moving device 50 is installed on the main base 21 of the long slide device 20 installed on the floor F in the vehicle interior. The outdoor moving device 50 includes a direction changing mechanism 50a and an elevating mechanism 5.
0b and 0b. The direction changing mechanism 50a supports two short slide rails 51, 51 mounted on the main base 21 in the vehicle front-rear direction (Y direction) and these short slide rails 51, 51 so as to be movable in the vehicle front-rear direction. Sub base 52
And a rotation mechanism 53 and a swing base 54 installed on the sub base 52.

The rotating mechanism 53 is an outer ring 53a and an inner ring 53b that are rotatably assembled to each other. The inner ring 53b is fixed on the sub-base 52, and the outer ring 53a is fixed on the lower surface of the swing base 54. The swing base 54 is supported by the rotating mechanism 53 so as to be rotatable about 90 ° between the front of the vehicle and the vehicle side (door opening D2 side). The swing base 54 is held in position by a rotation lock mechanism (not shown) at two positions, the front side of the vehicle and the side direction of the vehicle.

Although not shown, the swing base 54 is provided between the swing base 54 and the main base 21.
As a result, an interlocking mechanism for interlocking the rotation operation and the short slide operation of the seat body 10 is provided. This interlocking mechanism includes a pinion gear portion formed on the outer peripheral surface of the outer ring 53a, an intermediate gear that is rotatably supported by the sub base 52 and meshes with the pinion gear portion, and meshes with the intermediate gear, and the short slide rail 51 on the vehicle interior side. A rack mounted on the main base 21 is provided.
Further, a drive gear rotated by a rotation motor is meshed with the pinion gear portion, and the rotation of the rotation motor starts in the forward or reverse direction to cause the seat body 1 to rotate.
0 rotates to the front side of the vehicle or to the door opening D2 side, and short slides in conjunction with this rotation operation.

On both sides of the swing base 54, a pair of left and right four-bar linkage mechanisms 55, 55 constituting a lifting mechanism 50b.
Is attached, and the frame 13 of the seat body 10 (not shown) is detachably connected to the connecting plates 56, 56 of the four-bar linkages 55, 55.

Both quadruple link mechanisms 55 of the lifting mechanism 50b,
55 includes two link arms 55a and 55b, respectively, and the lower ends of both front link arms 55a and 55a have a support shaft 55d provided on a side wall portion 54c of the swing base 54.
It is rotatably connected vertically through 55d. On the other hand, between the lower ends of the rear link arms 55b, 55b, there is one connecting shaft 57 which rotates with respect to the side wall 54c.
Are integrally connected by the swing base 54 through the connecting shaft 57.
Is rotatably connected vertically.

The connecting shaft 57 has two quadruple link mechanisms 5 attached thereto.
An electric cylinder 59 is connected as a drive source for swinging the 5, 55 out of the room. The electric cylinder 59 is a combination of an electric motor and a screw shaft feeding mechanism, and a conventionally known one is used. A pulse motor is used as an electric motor of the electric cylinder 59, and its start and stop operations are controlled by a drive circuit of a control device (not shown), whereby the tilting directions of the four-bar linkage mechanisms 55, 55 are controlled. The tilting speed and tilting angle are controlled. Connecting plates 56, 56 are attached to the ends of the four-bar linkage mechanisms 55, 55.
The frame 13 of the seat body 10 described above is connected to 6, 56 in a detachable state.

An impact lock mechanism 30 is installed between the frame 13 of the seat body 10 and the main base 21 of the long slide device 20, as shown in FIG. The impact lock mechanism 30 is a mechanism for holding the seat body 10 in a seated position in the passenger compartment (front part of the main base 21), and includes a hook 32 and a pressing member 34 fixed to the frame 13 of the seat body 10, and a main base. It is composed of an engagement member 42 and a push-up member 44 attached to 21.

The hook 32 is the frame 1 of the seat body 10.
3 and is fixed to the center of the rear portion of the frame 13. As shown in FIG. 5, the hook 32 is formed with a lock recess 32e cut in the lower front side thereof, and the lock pin 4 of an engaging member 42 described later in the lock recess 32e.
2p can be engaged. The pressing member 34 is
When the seat body 10 is lowered to the seating position in the passenger compartment by the outdoor movement device 50, one end (load receiving plate portion 44b) of a push-up member 44, which will be described later, is pressed to push the push-up member 4 into the seat.
4 is a member that moves the other end (push-up flat plate portion 44a) of 4 upward, and is fixed in front of the hook 32 with a certain distance.

As shown in FIG. 6, the engaging member 42 has a main flat plate portion 42a and an auxiliary flat plate portion 42b which are formed with a predetermined thickness.
And a bearing portion 42j arranged between the flat plate portions 42a and 42b. The bearing portion 42j is formed in a cylindrical shape, and the main flat plate portion 4 is formed on the outer peripheral surface of the bearing portion 42j.
2a and the auxiliary flat plate portion 42b are fixed. here,
A virtual plane (main flat plate surface) on the extension of the main flat plate portion 42a and a virtual flat plane (auxiliary flat plate surface) on the extension of the auxiliary flat plate portion 42b intersect at the center of the bearing portion 42j. The inclination of the auxiliary flat plate surface with respect to is set to the angle α. A rectangular notch 42u, through which the hook 32 is inserted, is formed at the center of the main flat plate portion 42a in the width direction, and a cylindrical lock pin 42p is provided so as to connect both sides of the notch 42u. It is provided parallel to the bearing portion 42j.

The bearing portion 42j of the engaging member 42 is shown in FIG.
As shown in, the first support shaft 21p installed at the center of the front part of the main base 21 is inserted. The first support shaft 21p has substantially the same height as the surface of the main base 21, is arranged along the width direction (X direction) of the main base 21, and both ends thereof are supported by bearings (not shown). ing. Further, the main base 21 is formed with a first opening 21e below the first support shaft 21p for accommodating the bearing portion 42j of the engaging member 42.

As a result, the engaging member 42 is first supported from the position where the lock pin 42p of the main flat plate portion 42a abuts the surface of the main base 21 to the position where the auxiliary flat plate portion 42b abuts the surface of the main base 21. It is possible to rotate about α axis about the axis 21p. That is, the main flat plate portion 42a of the engaging member 42 can be rotated upward by about α ° from the position where it comes into contact with the surface of the main base 21, and in this state the engaging member 4 is rotated.
The second lock pin 42p engages with the hook 32 of the seat body 10 in the seated position, as shown in FIG.

The push-up member 44 is a member that pushes up the main flat plate portion 42a of the engaging member 42 to the engagement position with the hook 32. As shown in FIG. 6, the push-up flat plate portion 44a formed to have a predetermined thickness. And load-bearing plate part 4 bent into a chevron shape
4b and a bearing portion 44j arranged between both plate portions 44a and 44b. The push-up flat plate portion 44a is a portion that directly pushes up the main flat plate portion 42a of the engaging member 42, and is arranged below the main flat plate portion 42a (see FIG. 5). The bearing portion 44j is formed in a cylindrical shape, and the bearing portion 4j
4j on the outer peripheral surface of the push-up flat plate portion 44a and the load receiving plate portion 44b
The first plate portion 44c of is fixed. Here, the virtual plane (the push-up flat plate surface) on the extension of the push-up flat plate portion 44a and the virtual plane (the first plate surface) on the extension of the first plate portion 44c intersect at the center of the bearing portion 44j, The inclination of the first plate surface with respect to the push-up flat plate surface is set to an angle β. The second plate portion 44d of the load receiving plate portion 44b is formed substantially parallel to the push-up flat plate portion 44a.

As shown in FIG. 5, the second support shaft 21x installed on the main base 21 is inserted into the bearing portion 44j of the push-up member 44. The second support shaft 21x is installed in front of the first support shaft 21p.
It is positioned parallel to and substantially at the same height as p. Also,
A second opening 21y for accommodating the load receiving plate portion 44b of the push-up member 44 and the like is formed in the main base 21 below and below the second support shaft 21x. The load receiving plate portion 44b of the push-up member 44 is installed at a position that is pressed by the pressing member 34 of the seat body 10 when the seat body 10 is lowered to the seating position by the outdoor moving device 50.

As described above, since the push-up flat plate portion 44a of the push-up member 44 is arranged below the main flat plate portion 42a of the engaging member 42, the load receiving plate portion 44b of the push-up member 44 is arranged.
In the state in which the pressing force of the pressing member 34 is not received, the push-up flat plate portion 44a of the push-up member 44 is held in a state of abutting on the surface of the main base 21 due to the gravity and the own weight of the main flat plate portion 42a. As a result, the load receiving plate portion 44b of the push-up member 44 is held at a position higher than the surface of the main base 21 (see the alternate long and two short dashes line), and the second plate portion 44d of the load receiving plate portion 44b is the main base. It becomes almost parallel to the surface of 21.

In this state, when the seat body 10 is lowered to the seating position in the passenger compartment by the elevating mechanism 50b of the outdoor moving device 50, the pressing member 34 of the seat body 10 is pushed with a force substantially equal to the gravity of the seat body 10. The load receiving plate portion 44b of the raising member 44 is pressed. As a result, the push-up member 44
The load receiving plate portion 44b of the second base shaft 21 is pushed down to the surface position of the main base 21.
Rotate counterclockwise about x (counterclockwise in FIG. 5). When the push-up member 44 rotates counterclockwise about the second support shaft 21x, the push-up flat plate portion 44a of the push-up member 44 pushes up the main flat plate portion 42a of the engaging member 42, and the engaging member 42 receives the first support. It rotates right about the axis 21p (right in FIG. 5). Then, in a state where the push-up member 44 is rotated about the second support shaft 21x leftward by about β °, the engaging member 42 is rotated about the first support shaft 21p about α ° rightward, and the engaging member 42 is rotated. The lock pin 42p is hooked on the lock recess 32e of the hook 32.

Further, the lifting mechanism 50b of the outdoor moving device 50.
When the seat body 10 starts to rise from the seated position by moving in the upward direction, the load receiving plate portion 44b of the push-up member 44 does not receive the gravity of the seat body 10, and thus the push-up member 44 is supported by the second weight by its own weight. While rotating clockwise about the shaft 21x, the engaging member 42 also rotates counterclockwise around the first support shaft 21p by its own weight, and the lock pin 42p of the engaging member 42 disengages from the lock recess 32e of the hook 32. If a first spring (not shown) that applies a left rotational force to the engaging member 42 and a second spring (not shown) that applies a right rotational force to the push-up member 44 are mounted, The occurrence of backlash is suppressed between the main member 21 and the combination member 42 and the push-up member 44. That is, the hook 32 of the seat body 10 corresponds to the engaged member of the present invention, and the push-up member 44 of the main base 21 and the pressing member 34 of the seat body 10 correspond to the engagement holding mechanism of the present invention.

Next, the operation of the vehicle seat 1 having the above structure will be described with reference to FIGS. 1 to 7. First, a case where the seat body 10 of the vehicle seat 1 is moved from the driver's seat position (the position indicated by the chain double-dashed line in FIG. 2) to the outside of the passenger compartment will be described.
First, the elevating mechanism 50b of the outdoor moving device 50 is driven in the ascending direction to erect both the four-node link mechanisms 55, 55. As a result, the seat body 10 rises diagonally rearward, and the seat body 10 is held at the upper limit position in the vehicle compartment. When the seat body 10 starts to move up, the load receiving plate portion 44b of the push-up member 44 of the impact lock mechanism 30 is no longer subjected to the gravity of the seat body 10, so that the push-up member 44 rotates right about the second support shaft 21x. Then, the engagement member 42 rotates counterclockwise about the first support shaft 21p, and the lock pin 42p of the engagement member 42 disengages from the lock recess 32e of the hook 32. That is, the locked state of the impact lock mechanism 30 is automatically released when the seat body 10 starts to move up.
Therefore, the impact lock mechanism 30 causes the seat body 10 to
The raising movement of the is not disturbed.

Further, at the same time when the seat body 10 is lifted, the long slide device 20 operates to move the seat body 10 and the outdoor moving device 50 to the rear seat position. This state
It is represented by a solid line in FIGS. Next, the direction changing mechanism 50a of the outdoor moving device 50 is driven, and the swing base 54, the elevating mechanism 50b, and the seat body 10 are integrally slid toward the front of the vehicle for a short slide, and the right door opening D is formed.
Rotate right about 90 degrees toward 2. When the seat body 10 is turned toward the right door opening D2 in this way, the elevating mechanism 50b is driven in the descending direction, and the four-joint link mechanisms 55,
55 tilts forward about 30 ° to swing the seat body 10 forward. As a result, the seat body 10 is arranged outside the vehicle (see the chain double-dashed line in FIG. 3). In this state, the seat body 1
By taking out wheels (not shown) from 0 and disconnecting the seat body 10 from the outdoor movement device 50,
The seat body 10 can be used alone as a wheelchair.

Next, a case where the seat body 10 is mounted in the vehicle compartment in such a separated state will be described. First, the seat body 10 is connected rearward while approaching the outdoor moving device 50 with the seat body 10 facing backward. When the connection between the seat body 10 and the outdoor moving device 50 is completed, the elevating mechanism 50b of the outdoor moving device 50 is driven to drive the four-bar linkage mechanisms 55, 55.
Moves to the standing side (inside the room). As a result, the seat body 10 is lifted from the ground, and the wheels of the seat body 10 are folded in this state. After the wheels are folded, the elevating mechanism 50b is driven again in the ascending direction so that the seat body 10 is housed in the vehicle compartment. Both-four-joint link mechanism 5 of the lifting mechanism 50b
When the seats 5 and 55 stand up, the seat body 10 is in a state of being substantially positioned on the swing base 54.

In this way, the seat body 10 becomes the swing base 5
4, the direction changing mechanism 5 of the outdoor moving device 50 is returned.
0a is driven, and the seat body 10 and the swing base 5 are driven.
The 4 etc. rotate as a unit and rotate about 90 ° counterclockwise to the front of the vehicle. At this time, the seat body 10, the swing base 54, etc. are temporarily slid toward the vehicle front side while being short-slipped by the functions of the rotating device 53 of the direction changing mechanism 50a, the short slide rails 51, 51, and the interlocking mechanism. Rotate. Then, with the seat body 10, the swing base 54, and the like returned to the positions facing the front of the vehicle, the long slide device 20 is driven, and the seat body 10 and the outdoor movement device 50 move forward toward the driver's seat position. Then, when the seat body 10 reaches the position before the driver's seat position, the long slide operation is stopped, and the elevating mechanism 50b of the outdoor moving device 50 is driven in the descending direction to cause the four-bar linkage mechanisms 55, 5 to move.
The seat body 10 swings forward by tilting the seat body 5 by about 30 ° in the forward tilt direction, and the seat body 10 descends to the sitting position. Further, the long slide device 20 stops and the seat body 10 is held at the driver's seat position.

When the seat body 10 is lowered to the seating position by the elevating mechanism 50b of the outdoor moving device 50, the pressing member 34 of the seat body 10 is moved to the seat body 1 as shown in FIG.
The load receiving plate portion 44b of the push-up member 44 constituting the impact lock mechanism 30 is pressed with a force substantially equal to the gravity of zero. As a result, the load receiving plate portion 44b of the push-up member 44 is pushed down to the surface position of the main base 21, and the push-up member 44 rotates counterclockwise (upward rotation) about the second support shaft 21x. When the push-up member 44 rotates upward about the second support shaft 21x, the push-up flat plate portion 44 of the push-up member 44 is rotated.
a pushes the main flat plate portion 42a of the engaging member 42 upward,
The engaging member 42 rotates about the first support shaft 21p rightward by about α °, and the lock pin 42p of the engaging member 42 moves to the hook 3 position.
It is hung on the second lock recess 32e. That is, the seat body 1
The impact lock mechanism 30 automatically operates when 0 is lowered to the seated position.

In this state, if the front portion of the vehicle collides with another vehicle or the like (front collision), the seat body 10 will be inertial force with respect to the vehicle (specifically, the main base 21 connected to the vehicle). Try to move forward. At this time, the lock pin 42p of the engagement member 42 that constitutes the impact lock mechanism 30 is
As shown in FIG. 7A, the lock recess 32 of the hook 32 is provided.
The forward movement of the seat body 10 with respect to the vehicle is stopped by coming into contact with the rear wall Hb of e. Therefore, the seat body 10 does not separate from the vehicle at the time of a frontal collision. Further, when another vehicle or the like collides with the rear portion of the vehicle (back collision), the seat body 10 tries to move rearward with respect to the vehicle due to inertial force. At this time, the lock pin 42p of the engagement member 42 contacts the front wall Hf of the lock recess 32e of the hook 32, as shown in FIG. 7B, and the backward movement of the seat body 10 with respect to the vehicle is stopped. Therefore, the seat body 10 will not be separated from the vehicle even in the case of a rear collision. That is, the rear wall Hb of the lock recess 32e corresponds to the front-projection portion of the present invention, and the front wall Hf of the lock recess 32e corresponds to the rear-projection portion of the present invention. Note that FIG. 7 (A)
The two-dot chain line in (B) is a schematic position of the hook 32 and the like in a state where no impact is applied.

As described above, in the vehicle seat 1 according to the present embodiment, since the impact lock mechanism 30 operates in a state where the seat body 10 is lowered to the seating position in the vehicle compartment, for example,
The seat body 10 will not be separated from the vehicle even if the vehicle collides with the front or rear of the vehicle. Further, the push-up member 44 that constitutes the impact lock mechanism 30 receives the force equal to the gravity of the seat body 10 via the pressing member 34 when the engaging member 42 is received.
Since the lock pin 42p of 4 is engaged with the lock recess 32e of the hook 32, the impact lock mechanism 30 can be reliably operated when the seat body 10 is lowered to the sitting position.

Further, since the shock lock in the front-rear direction can be performed by the set of the engaging member 42 and the hook 32, the structure is simple and the cost is advantageous. If the impact lock mechanism 30 is also installed in the width direction of the vehicle, it is possible to prevent the seat body 10 from being separated from the impact from the side surface of the vehicle. Further, in the present embodiment, the impact lock mechanism 30
Although the example in which the first support shaft 21p and the second support shaft 21x are provided on the main base 21 is shown, the first support shaft 21p and the second support shaft 21x may be provided below the main base 21 as shown in FIG. Further, in the present embodiment, the hook 32 of the impact lock mechanism 30 is used.
One example is shown in which one hook is installed at the rear center of the frame 13 of the seat body 10. However, if the hooks 32 are installed on the both sides of the rear part of the frame 13 (two hooks are installed), the seat body 10 is not affected by a shock.
Can be prevented from rotating in the horizontal direction.

As described above, when two hooks 32 are installed in the width direction of the frame 13, it is necessary to change the shape of the engaging member 42 that engages with the hook 32 in accordance with the hook 32. FIG. 9 shows a perspective view of the engaging member 42 used when two hooks 32 are installed in the width direction of the frame 13. Square notches 42u through which the hooks 32 pass are formed at both ends in the width direction of the engaging member 42, and engaging plates 42p that engage with the hooks 32 are formed at the tips of the notches 42u. There is. The lock pin 42p may be used instead of the engagement plate 42p. In this way, the hook 32 is attached to the frame 1
Impact lock mechanism 30 with a structure in which two are installed in the width direction of 3
As shown in FIG. 10, the push-up member 44 has the engaging member 4
By pushing up 2, the engaging plate 42p of the engaging member 42
Is engaged with the hook 32, and the operation principle is exactly the same as that of the impact lock mechanism 30 shown in FIG.

(Second Embodiment) Hereinafter, a vehicle seat according to a second embodiment of the present invention will be described with reference to FIGS. 11 and 12. The vehicle seat 70 according to the present embodiment is obtained by modifying the impact lock mechanism 30 of the vehicle seat 1 according to the first embodiment, and other structures are similar to those of the vehicle seat 1 according to the first embodiment. . Therefore, the same members as those of the vehicle seat 1 according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. The impact lock mechanism 71 of the vehicle seat 70 according to the present embodiment includes an insertable hook 72 fixed to the frame 13 of the seat body 10 and the main base 2.
It is composed of a hook retainer 76 attached to 1.

The insertable hook 72 is fixed to the lower side of the frame 13 of the seat body 10 and to the front center of the frame 13. The insertable hook 72 has a prismatic vertical portion 7.
4 and the substantially pyramid-shaped lateral portion 75 are formed in a hook shape, and an upper hook claw 75f is formed at the tip of the lateral portion 75. The hook retainer 76 is a lateral portion 75 of the insertable hook 72.
Is a tubular member into which is inserted, and is fixed to the center of the front portion of the main base 21. The hook retainer 76 is formed in a tapered shape in accordance with the shape of the lateral portion 75 of the insertable hook 72. Further, the length of the hook retainer 76 in the axial direction is determined by the tip portion of the lateral portion 75 of the insertable hook 72. The length is set so that it can project.

The inner width of the hook retainer 76 is set to be substantially equal to the outer width of the lateral portion 75 of the insertable hook 72 (see FIG. 11C). Therefore, with the lateral portion 75 of the insertable hook 72 inserted in the hook retainer 76,
The outer wall surface of the lateral portion 75 is almost in close contact with the inner wall surface of the hook retainer 76, and the insertable hook 72 for the hook retainer 76 is provided.
It is possible to prevent the rattling in the lateral direction and to lock the impact in the lateral direction with respect to the vehicle.

The height of the rear end portion of the hook presser 76 is such that the seat body 10 is lifted / lowered by the lifting mechanism 50b of the outdoor moving device 50.
The lower end of the insertable hook 72 is hooked by the hook retainer 76 when descending to the seated position by following the predetermined trajectory.
It is set to a value that does not collide with the rear end face 76b. Further, the height dimension of the front end portion of the hook presser 76 is determined by the seat body 1
When 0 moves up from the seated position following the predetermined trajectory by the action of the lifting mechanism 50b of the outdoor moving device 50, the upper hook claw 75f of the insertable hook 72 has a value that does not engage the tip surface 76e of the hook retainer 76. It is set. Therefore, the impact lock mechanism 71 does not interfere with the operation of the outdoor movement device 50.

However, when the seat body 10 is in the sitting position and the vehicle collides forward and the seat body 10 tries to move forward, as shown in FIG.
The front surface 74k of the vertical portion 74 of the insertable hook 72 comes into contact with the rear end surface 76b of the seat 6, and the forward movement of the seat body 10 with respect to the vehicle is stopped. Therefore, the seat body 10 does not separate from the vehicle at the time of a frontal collision. Further, when the vehicle collides rearward with the seat body 10 in the seated position and the seat body 10 tries to move rearward, the movement of the seat body 10 deviates from a predetermined locus, so that FIG. As shown in
The upper claw 75f of the lateral portion 75 of the insertable hook 72 is hooked on the front end surface 76f of the hook retainer 76, and the backward movement of the seat body 10 with respect to the vehicle is stopped. Therefore, the seat body 10 will not be separated from the vehicle at the time of a rear collision. That is, the insertable hook 72 corresponds to the engaged member of the present invention, and the hook holder 7
6 corresponds to the engaging member of the present invention.

As described above, in the vehicle seat 70 according to the present embodiment, the seat body 10 descends to the seating position along a predetermined locus in the passenger compartment, and the seat body 10 further sits down on the predetermined locus. The insertable hook 72 and the hook retainer 76 do not engage with each other when rising from above. However, when a shock is applied to the vehicle and the seat body 10 moves out of its trajectory, the insertable hook 72 and the hook retainer 7
The seat body 10 is held immovably with respect to the vehicle by engagement with the seat body 6. Therefore, the engagement holding mechanism and the like used in the first embodiment are unnecessary.

Further, the hook retainer 76 is formed in a tapered cylindrical shape, and the lateral portion 75 of the insertable hook 72 is attached to the hook retainer 76.
Since it is formed in a tapered shape so that it can be fitted with, the play in the fitted state of the insertable hook 72 and the hook presser 76 can be suppressed, and a lateral impact lock can be provided.

Incidentally. In the vehicle seats 1 and 70 according to the first and second embodiments, the vehicle seat including the device 20 that slides the seat body 10 in the longitudinal direction of the vehicle has been described as an example, but the long slide device 20 is provided. It is also possible to apply the present invention to an unoccupied vehicle seat.

[0046]

According to the present invention, when an impact is applied to the vehicle at least while the occupant is seated while the vehicle is traveling, the impact lock mechanism operates and the seat body and the vehicle are locked so that they cannot move relative to each other. For this reason, for example, even if the vehicle is rear-end-collised while the vehicle is traveling and the seat body tries to move rearward with respect to the vehicle, the seat body does not separate from the vehicle.

[Brief description of drawings]

FIG. 1 is a side view of a vehicle seat according to a first embodiment of the present invention, a drawing showing a state in which an impact lock mechanism is not working (FIG. A), and a drawing showing a state in which the impact lock mechanism is working. (Fig. B).

FIG. 2 is a side view showing a state where the seat body of the vehicle seat according to the first embodiment of the present invention is moved from the outside of the vehicle compartment to the rear seat position of the vehicle compartment and is slid long to the rear driver's seat position. There is.

FIG. 3 is a plan view showing a state in which the seat body of the vehicle seat according to the first embodiment of the present invention is moved from the outside of the vehicle compartment to the rear seat position of the vehicle interior and is slid to the rear seat position after that. There is.

FIG. 4 is a perspective view of a vehicle seat outdoor movement device according to the first embodiment of the present invention.

FIG. 5 is a side view of the impact lock mechanism of the vehicle seat according to the first exemplary embodiment of the present invention.

FIG. 6 is a perspective view of a main part of an impact lock mechanism.

FIG. 7 is a side view showing a state of the impact lock mechanism at the time of a front collision (FIG. A), and a side view showing a state of the impact lock mechanism at a time of a rear impact (FIG. B).

FIG. 8 is a side view showing a modified example of the impact lock mechanism.

FIG. 9 is a perspective view showing a modified example of the impact lock mechanism.

FIG. 10 is a side view showing a modified example of the impact lock mechanism.

FIG. 11 is a side view of a vehicle seat according to a second embodiment of the present invention (FIG. A), a side view of an impact lock mechanism (FIG. B), and a plan view of the impact lock mechanism (FIG. C).

FIG. 12 is a side view (FIG. A) showing a state of the impact lock mechanism at the time of a frontal collision, and a side view (FIG. B) showing a state of the impact lock mechanism at a time of a rearward collision.

FIG. 13 is a side view (A) of a conventional vehicle seat and a perspective view (B) showing the arrangement of an impact lock mechanism.

FIG. 14 is a detailed view of a conventional impact lock mechanism.

[Explanation of symbols]

1 Vehicle seat 10 seat body 30 Impact lock mechanism 32 hooks (engaged members) 34 Pressing member (engagement holding mechanism) 42 Engagement member 42p lock pin 44 Push-up member (engagement holding mechanism) 50 outdoor movement device 50a direction change mechanism 50b lifting mechanism 72 Insertable hook (engaged member) 74 Vertical 75 horizontal 75f upper claw 76 Hook retainer (engagement member)

Front Page Continuation (72) Inventor, Masanobu Takenoshita, 395, Uenodan, Kokubun City, Kagoshima Prefecture Toyota Body Research Institute Co., Ltd. (56) References JP-A-11-28226 (JP, A) JP-A-11-309175 (JP, A) JP-A-11-48839 (JP, A) Actual Kaihei 1-24639 (JP, U) (JP 58) Fields investigated (Int.Cl. ⁷ , DB name) B60N 2/00-2/42 A61G 3/00

Claims (6)

(57) [Claims] 1. A seat body, an elevating mechanism for moving the seat body up and down while moving the seat body in the front-back direction, and rotating the elevating mechanism and the seat body integrally to change the direction of the seat body. A vehicle seat including a direction changing mechanism, wherein the seat body is lowered to a seating position in the vehicle compartment by the elevating mechanism, and when a shock is applied to the vehicle, A vehicle seat having an impact lock mechanism for connecting a vehicle so that the vehicle cannot move relative to the vehicle. 2. The vehicle seat according to claim 1, wherein the impact lock mechanism is an engaged member provided on the seat body, an engaging member provided on the vehicle side, and the impact lock mechanism is lowered to a sitting position. A vehicle seat, comprising: an engagement holding mechanism that holds the engagement member and the engaged member in an engaged state when receiving the gravity of the seat body. 3. The vehicle seat according to claim 2, wherein the engaged member includes a front collision portion with which the engaging member abuts when the seat body is about to move forward with respect to the vehicle. A vehicle seat, comprising: a rear-collision portion with which the engaging member abuts when the seat body tries to move rearward with respect to the vehicle. 4. The vehicle seat according to claim 1, wherein the impact lock mechanism has an engaged member provided on the seat body and an engaging member provided on the vehicle side, When the seat body moves up and down along a predetermined locus due to the action of the lifting mechanism, the engaged member and the engaging member do not engage with each other, and the seat body moves away from the locus due to impact. A vehicle seat having a structure in which the engaged member and the engaging member are engaged with each other. 5. The vehicle seat according to claim 4, wherein the engagement member provided on the vehicle side has a tubular portion, and the engaged member provided on the seat body has a vertical portion and a horizontal portion. Is formed in a hook shape by the portion, the horizontal portion is a structure to be inserted into the tubular portion of the engaging member, and a claw is formed at the tip of the horizontal portion protruding from the tubular portion, When the seat body tries to move in the direction in which the lateral portion of the engaged member is pulled out from the tubular portion of the engaging member due to impact,
A vehicle seat having a structure in which a claw of the engaged member is engaged with the engaging member. 6. The vehicle seat according to claim 5, wherein the tubular portion of the engaging member is formed in a tapered tubular shape, and the lateral portion of the engaged member can be fitted with the tubular portion. A vehicle seat characterized in that it is formed in a tapered shape.