JP2584934B2 - Safety devices for vehicle seats - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a vehicle seat that can secure a living space for an occupant seated on the vehicle seat in a side collision of the vehicle.

[0002]

2. Description of the Related Art In the prior art, it is generally possible to secure an occupant space even when an impact force enters a vehicle interior from a side wall of a vehicle body such as a door in a side collision of a vehicle. There is one as shown in Japanese Patent No. 35017.

That is, a reinforcing member extending in the vehicle width direction is provided only in the seat cushion, and an impact load at the time of a side collision is transmitted from one side of the vehicle body to the other side by each reinforcing member.
This is to secure a living space for the seated person.

[0004] There is also one disclosed in Japanese Utility Model Laid-Open Publication No. Hei 3-26652. That is, both the seat cushion and the seat back are internally provided with a cross member integrally fixed via a connecting member, and are adapted to adjust the position of the entire seat in the vertical direction, so that a wide range of side collisions can be achieved. Is transmitted from one vehicle body side wall to the other vehicle body side wall.

[0005]

However, in the prior art as disclosed in Japanese Patent Publication No. 61-35017,
Only the seat cushion can prevent deformation during a side collision, and the impact load during an actual side collision is also input from the side of the vehicle body, which is higher than the seat cushion. Yes, improvements are desired.

Further, in the prior art as disclosed in Japanese Utility Model Laid-Open Publication No. 3-26652, the reclining operation of the seat back is not considered, and the occupant getting on and off is not considered at all. There was a problem that it was not good.

The present invention has been made in view of such a conventional problem, and secures a living space for an occupant seated in a vehicle seat in the event of a side collision of a vehicle, thereby improving occupant safety. It is an object of the present invention to provide a vehicle seat safety device that can be reliably improved, can perform a reclining operation, can improve occupant getting on and off, and can improve usability.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to secure a living space for an occupant sitting on a vehicle seat (20) in the event of a side collision of a vehicle. A reclining mechanism (30) for supporting a seatback (21) at an adjustable tilt angle at a rear end of a seat cushion (25) of the vehicle seat (20); A high-rigidity reinforcing member (4) extending at least in the vehicle width direction and provided at least at a rear end of the seat cushion (25) and at least a base end of the seat back (21).
, 43), and receives the impact load at the time of a side collision, and overlaps with the reinforcing members (41, 43,...) To transmit the load in the vehicle width direction via the reinforcing members (41, 43,...). The seat cushion (25) is attached to one end of the rear end of the seat cushion (25) close to the vehicle body side wall (12) so as to be linearly movable to a load transmitting position to be obtained and to a getting on / off position obliquely rearward and downward from the load transmitting position. A side collision responding member (50), a seating detection unit (70) for detecting a seating state of an occupant on the vehicle seat (20), and a seating signal from the seating detection unit (70); Control means (8) for moving the corresponding member (50) from the getting on / off position to the load transmitting position and moving from the load transmitting position to the getting on / off position based on the unseated signal from the seating detecting means (70).
0), which is a safety device for a vehicle seat.

The tilting angle of the seat back (21), which can be adjusted by the reclining mechanism (30), can be adjusted by the reinforcing members (41, 43...) Provided at the base end of the seat back (21). There is provided a vehicle seat safety device having a control means (80) for restricting a certain range overlapping with a side collision corresponding member (50) at a load transmitting position.

[0010] An energy absorbing member (90) is provided on the side of the seat corresponding to the side collision corresponding member (50).

[0011]

In the event of a side collision of a vehicle, an impact load penetrates into the cabin from the side of the vehicle body such as the door (12), and the deformed vehicle body side transmits the load to one end of the rear end of the seat cushion (25). It collides with the side collision corresponding member (50) at the position. The impact load received by the side collision corresponding member (50) is applied to the reinforcing member (25) provided at each end of the seat cushion (25) or the seat back (21) overlapping the side collision corresponding member (50) at the load transmitting position. 41, 43...) In the vehicle width direction, for example, to the console, the seats arranged side by side, and further to the opposite side wall of the vehicle body. As described above, the impact load input from one vehicle body side wall is transmitted in the vehicle width direction.

Accordingly, in the event of a side collision of the vehicle, the side collision member (50) at the load transmitting position or the reinforcing member (41) in the vehicle seat (20) overlapping the collision member (50). , 43..), Deformation of not only the rear end portion of the seat cushion (25) but also the base end portion of the seat back (21) is prevented as much as possible, and the living space of the seated occupant is ensured. Safety is ensured.

In the event of such a side collision of the vehicle, the side collision responding member (50) for ensuring the safety of the occupant includes the load transmitting position described above, and the getting on / off position obliquely below the load transmitting position. Therefore, if the side collision support member (50) is at the entry / exit position when the occupant gets on / off, the side collision support member (50) does not become an obstacle at the time of getting on / off, and the occupant's getting on / off property is improved. be able to.

The side collision responding member (50) is provided by a seating detecting means (70) and a control means (80) in order to ensure the safety of the occupant in the event of a side collision and to facilitate the occupant when getting on and off. Is controlled as follows. That is, the seating detecting means (7) for detecting the seating of the occupant on the vehicle seat (20).
0), the control means (80) moves the side collision corresponding member (50) from the getting on / off position to the load transmitting position, and based on the unseated signal from the seating detecting means (70), It is possible to move from the load transmitting position to the getting on / off position, respectively.

Further, based on a seating signal from seating detecting means (70) for detecting the seating of the occupant on the vehicle seat (20), the control means (80) moves the side collision corresponding member (50) from the getting on / off position. The reinforcing members (41, 42,...) In the base end of the seat back (21) adjust the tilt angle of the seat back (21) which can be adjusted by the reclining mechanism (30) while being moved to the load transmitting position. The position is restricted within a certain range overlapping with the side collision corresponding member (50) at the position.

Further, the energy absorbing member (90) is disposed so as to be located on the side of the occupant of the side collision corresponding member (50).

[0017] Thus, in consideration of the reclining operation of the seat back (21), a sufficient living space for the occupant seated on the vehicle seat (20) can be secured at the time of side collision of the vehicle, while getting on and off at the time of getting on and off the vehicle. It can also improve the performance.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of the present invention will be described below with reference to the drawings. In the various embodiments, the same parts are denoted by the same reference numerals, and redundant description will be omitted. 1 to 5 show a first embodiment of the present invention.

The safety device for a vehicle seat includes a reclining mechanism 30 that supports a seat back 21 at the rear end of a seat cushion 25 of a driver's seat 20 so as to adjust the tilt angle.
, High rigidity reinforcing members 41, 42, 43, 44... Extending in the vehicle width direction on the seat cushion 25 and the seat back 21, respectively. A side collision corresponding member 50 attached to one end of the rear end, a seating detecting means 70 capable of detecting a seated state and an unseated state to be compared by the seat cushion 25, and an operation described later based on a signal from the seating detecting means 70 And control means 80 capable of performing the following.

The driver's seat 20 and the passenger seat 20a are arranged side by side on the vehicle body floor 10, and a console 11 is provided between the driver's seat 20 and the passenger seat 20a. The console 11 includes a highly rigid member capable of transmitting a load from one side to the other side in the vehicle width direction. Driver's seat 20
Is mounted on the vehicle body floor 10 via a seat slide device 13 so that the front-rear position can be adjusted.

The seat slide device 13 has a pair of mutually parallel rail units 13a, 13a disposed below both sides of the seat cushion 25 and extending in the front-rear direction. The rail unit 13 a is a vehicle-side rail 15 fixed to the vehicle body floor 10 via leg members 16 and 17, and the vehicle-side rail 15 is fitted to the vehicle-side rail 15 movably back and forth to support the driver's seat 20. And the rails 14 of FIG.

The seat cushion 25 is provided with a cushion frame 26 therein.
Has a back frame 22 therein.

More specifically, the back frame 22
Are flat side portions 24, 24, and both side portions 24, 24,
And a substantially U-shaped upper portion 23 connecting between upper ends of the upper portion 24. At the lower end of both side portions 24, which are the base end portions of the back frame 22, a bar-shaped and highly rigid first reinforcing member 41 and a second reinforcing member 42 are provided so as to be vertically parallel. Similarly, bar-shaped and high-rigid third reinforcing members 43 and fourth reinforcing members 44 are provided on both sides of the rear end of the cushion frame 26 and on both sides of the front end, respectively. Note that the passenger seat 20a is also configured substantially similarly to the driver seat 20.

As shown in FIG. 1, the reclining mechanism 30 is connected to a base member 32 fixed to the rear end of the cushion frame 26, and is connected to the rear end of the base member 32 via a pivot 33 so that the tilt angle can be adjusted. An arm member 31 is fixed to the base portion outer wall of the side portion 24 of the back frame 22. The reclining mechanism 30 is a power reclining mechanism that tilts the arm member 31 by the reclining motor 33a. The reclining motor 33a is connected to control means 80 described later.

A side collision corresponding member 50 is mounted on one end of the rear end of the seat cushion 25 near the door 12 as one vehicle body side wall. Such a side collision corresponding member 50
Indicates that the impact load at the time of a side collision is
The first and second consoles 1 and 2 are linearly movable at a load transmitting position to be transmitted to the console 11 located in the vehicle width direction, and at an entry / exit position obliquely rearward and downward from the load transmitting position.

More specifically, the side collision responding member 50
Are formed from side plate portions 50a, 50a facing each other, and crossbars 51, 52, 53 which are erected perpendicularly to the side plates 50a between the both side plate portions 50a, 50a. As shown in FIG. 1, 52 and 53 are provided so as to be linearly connected to the reinforcing members 41, 42 and 43 in the driver's seat 20 when the side collision corresponding member 50 is at the load transmitting position. A cushioning material (energy absorbing material) 90 for absorbing an impact load is provided on the side of the seat corresponding to the side collision corresponding member 50.

As shown in FIG. 4, the movement of the side collision corresponding member 50 to the load transmitting position (shown by a solid line) or the getting on / off position (shown by a two-dot broken line) is performed by a drive mechanism 60. The driving mechanism 60 is, as shown in FIG.
a nut member 64 fixed to the rear end of the seat-side rail 14 via a fixing bracket 65; a screw member 63 rotatably screwed to the nut member 64;
An electric motor 61 is provided between the side plates 50a and 50a of the side collision corresponding member 50 and fixedly rotates the screw member 63 via the gear case 62. A cushion material 90 as an energy absorbing member is disposed on the side of the occupant, that is, on the opposite side of the side plate portions 50a, 50a.

As shown in FIG. 2, the seat cushion 25 of the driver's seat 20 has seating detecting means 70. The seating detecting means 70 detects a seating state of the occupant in the driver's seat 20 and sends a seating detection signal to the control means 80. The seating detection means 70 is, for example,
The switch includes a switch for detecting the detached state of the seat belt of the driver's seat 20 as described in Japanese Patent Application Laid-Open Publication No. H11-209, and a pressure sensor which is provided in the seat cushion 25 and operates according to the weight of the occupant. The specific configuration is general and will not be described.

As shown in FIG. 2, the control means 80 which receives a seating detection signal from the seating detecting means 70 is constituted by a microcomputer, and comprises a CPU, a ROM, a RAM, etc., and in addition to the seating detecting means 70, the reclining mechanism 30 Of the drive mechanism 60 for moving the reclining motor 33a and the side collision corresponding member 50.

When the seating detection signal is input from the seating detecting means 70, the control means 80 outputs a side collision corresponding signal to the electric motor 61 of the driving mechanism 60, and thereby the side collision corresponding member 50 is connected to the electric motor 61. Is driven to move from the getting on / off position to the load transmitting position. Further, when the seating detection signal from the seating detection unit 70 is input, the control unit 80 outputs a tilt limit signal to the reclining motor 33a of the reclining mechanism 30, whereby the seatback 21 that the seated occupant can arbitrarily adjust.
Is set so as to be restricted within a certain range in which the first reinforcing member 41 provided at the base end of the seat back 21 overlaps the side plate portion 50a of the side collision corresponding member 50 at the load transmitting position. I have.

Next, the operation of this embodiment will be described. When the driver, who is the occupant, is not seated in the driver's seat 20, the seating detecting means 70 does not detect the seating state of the occupant, and therefore does not output the seating detecting signal to the control means 80. In this case, since the control means 80 does not operate, the side collision corresponding member 50 attached to one end of the rear end of the seat cushion 25 remains in the getting on / off position, as indicated by the two-dot broken line in FIG. Thereby, when the occupant gets on and off, the side collision corresponding member 50 does not become an obstacle, and the occupant's getting on and off performance can be improved.

On the other hand, when the driver, who is the occupant in the vehicle, sits in the driver's seat 20, the seating detection means 70 detects the driver's seating and outputs a seating detection signal to the control means 80. Based on this, the control means 80 controls the driving mechanism 6
0 is output to the electric motor 61, and the reclining motor 3 of the reclining mechanism 30 is output.
The tilt control signal is output to 3a.

As a result, the electric motor 61 which has received the side collision corresponding signal from the control means 80 is driven to move the side collision corresponding member 50 from the getting on / off position shown by the two-dot broken line in FIG.
Is moved linearly to the load transmission position indicated by the solid line. That is, as shown in FIG. 5, when the electric motor 61 is driven based on the side collision corresponding signal, the screw member 63 is rotated by the gear case 62. This screw member 6
3 is a nut member 64 fixed to the rail 14 on the seat side.
The rotatable screw member 63 moves diagonally forward and upward while being supported by the nut member 64. As a result, the side collision corresponding member 50 moves linearly to the load transmitting position. become.

As shown in FIG. 3, when a side collision of the vehicle occurs when the side collision corresponding member 50 is at the load transmitting position,
Normally, an impact load enters the vehicle cabin from the position indicated by a white arrow in FIG. 3 from the door 12 as the vehicle body side wall, and the deformed door 12 is moved to the load transmitting position on one end side of the rear end of the seat cushion 25. It collides with a certain side collision corresponding member 50.

The impact load received by the side collision corresponding member 50 is equivalent to the reinforcing members 41, 42,... Provided at the respective ends of the seat cushion 25 and the seat back 21 overlapping the side collision corresponding member 50 at the load transmitting position. Subsequently, the power is transmitted in the vehicle width direction to the opposite side of the vehicle body via the console 11 and the passenger seat 20a. In this way, the impact load input from the side of the vehicle body such as one door 12 is transmitted to the side of the vehicle body such as the door on the opposite side.

Thus, in the event of a side collision of the vehicle, the side cushion corresponding member 50 at the load transmitting position and the reinforcing members 41, 42,... The deformation of not only the rear end but also the base end of the seat back 21 is prevented as much as possible, and the living space of the driver as a seated occupant is secured, so that the safety of the occupant is secured.

Further, in a state where the driver is seated in the driver's seat 20, that is, in a state in which the driver can travel, the reclining motor 33 a of the reclining mechanism 30 inputs a tilting restriction signal from the control means 80, and the reclining mechanism 30 The tilt angle of the seat back 21 that can be adjusted by the driver as the occupant is within a certain range in which the first reinforcing member 41 in the base end of the seat back 21 overlaps the side plate portion 50a of the side collision corresponding member 50 at the load transmitting position. Regulated within. As a result, the driver's seat 20 can be positioned in the event of a side collision of the vehicle while taking into account the reclining operation of the seat back 21.
It is possible to secure a sufficient living space for the driver who is the occupant sitting in the vehicle.

When the driver gets off the vehicle,
When the driver separates from the driver's seat 20, the seating detecting means 70 does not detect the seating state of the occupant, and the driving mechanism 60 is temporarily activated to move the side collision corresponding member 50 from the side collision corresponding position to the original position. To the position and the control means 80
The restriction on the tilting of the seat back 21 due to the above is also released.

Although the above-described embodiment has shown an example in which the reclining mechanism 30 and the driving mechanism 60 are added in parallel by a signal by the control means 80, the present invention is not limited to this, and the reclining mechanism is a manual type. The signal from the control means 80 may be input only to the driving mechanism 60.

FIG. 6 shows a second embodiment of the present invention. In the present embodiment, as shown in FIG. 6, the side collision corresponding member 55 attached to the other end of the rear end of the seat cushion 25 near the center of the vehicle body is formed to extend to the adjacent passenger seat 20a. Things. A description of the same parts as in the first embodiment will be omitted.

Accordingly, at the time of a side collision of the vehicle, the side collision corresponding member 55 of the driver's seat 20 is securely engaged with the side collision corresponding member 50 of the front passenger seat 20a, and is located between the driver's seat 20 and the passenger seat 20a. Since the impact load can be reliably transmitted from one side to the other side together with the console 11 in which a highly rigid member is installed, the safety of the vehicle seat including the driver's seat 20 and the passenger's seat 20a is further improved. be able to. Also,
The side collision corresponding member 55 can also be used as a frame member of the armrest.

In the safety device for a vehicle seat according to the above embodiment, the driver's seat of the vehicle seat has been mainly described. Can be provided.

[0043]

According to the safety device for a vehicle seat according to the present invention, the impact load at the time of a side collision is received by the side collision corresponding member mounted on the seat cushion side, and the load is reinforced inside the vehicle seat. While transmitting to the vehicle body side wall on the opposite side via the member, the side collision corresponding member can be moved obliquely rearward and downward when the occupant gets on and off the vehicle. The tilt angle of the seat back, which can be adjusted in the above, can be restricted within a certain range in which the reinforcing member provided in the seat back overlaps the side surface corresponding member, so that the vehicle is seated on the vehicle seat at the time of a side collision of the vehicle. By ensuring a sufficient space for the occupants to survive, the safety of the occupants can be reliably improved, and the reclining operation of the seat back is possible. Improves the occupant getting on and off of the movement of the side collision corresponding member, it is possible to improve the usability.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a driver seat provided with a vehicle seat safety device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a safety device for a vehicle seat according to a first embodiment of the present invention.

FIG. 3 is a front view showing the vehicle seat provided with the vehicle seat safety device according to the first embodiment of the present invention.

FIG. 4 is a side view showing a driver seat provided with a vehicle seat safety device according to the first embodiment of the present invention.

FIG. 5 is a side view showing a driving mechanism of a side collision corresponding member constituting the safety device for a vehicle seat according to the first embodiment of the present invention.

FIG. 6 is a front view showing a vehicle seat provided with a vehicle seat safety device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 ... Driver seat 20a ... Passenger seat 21 ... Seat back 22 ... Back frame 25 ... Seat cushion 26 ... Cushion frame 30 ... Reclining mechanism 33a ... Reclining motor 41 ... First reinforcement member 42 ... Second reinforcement member 43 ... Third reinforcement member 44: fourth reinforcing member 50: side collision corresponding member 50a: side plate 51, 52, 53 cross bar 60: drive mechanism 61: electric motor 70: seating detection means 80: control means 90: energy absorbing member

Claims (3)

(57) [Claims] 1. A vehicle seat safety device capable of securing a living space for an occupant seated on a vehicle seat upon a side collision of the vehicle, wherein a rear end of a seat cushion of the vehicle seat includes: A reclining mechanism that supports the seat back so that the tilt angle can be adjusted; at least a rear end portion of the seat cushion; and at least a base end portion of the seat back, a high-rigidity reinforcing member that extends in the vehicle width direction and is installed therein. A load transmitting position capable of transmitting the load in the vehicle width direction via the reinforcing member by receiving the impact load at the time of a side collision and overlapping the reinforcing member; A side collision corresponding member mounted on one end side of the rear end of the seat cushion adjacent to the vehicle body side wall so as to be linearly movable to the vehicle seat; A seating detecting means for detecting a seating state of an occupant of the vehicle; and, based on a seating signal from the seating detecting means, moving the side collision corresponding member from the getting on / off position to the load transmitting position and not seating from the seating detecting means. Control means for moving from the load transmitting position to the getting on / off position based on a signal. 2. The side collision corresponding member according to claim 1, wherein said control means adjusts a tilt angle of said seat back which can be adjusted by said reclining mechanism, wherein said reinforcing member provided at a base end of said seat back is at said load transmitting position. 2. The safety device for a vehicle seat according to claim 1, wherein the vehicle safety device is controlled so as to be within a certain range overlapping with the vehicle seat. 3. The safety device for a vehicle seat according to claim 1, wherein an energy absorbing member is disposed on the side of the seat corresponding to the side collision corresponding member.