JP3737653B2 - Vehicle seat device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle seat device installed in a vehicle such as an automobile.
[0002]
[Prior art]
In a general vehicle seat, as a countermeasure against a side collision, a connecting rod that connects the left and right reclining adjusters, or a connecting rod such as a seat lifter provided between the left and right slide bases under the cushion frame, enters the door from the outside of the vehicle body. In addition, the sheet can be prevented from falling. In addition, as a countermeasure against a frontal collision of a vehicle, it has been proposed to absorb collision energy by plastically deforming a link constituting a cushion frame and a seat lifter.
[0003]
In order to reduce the weight of the vehicle, it has been proposed to use a light metal such as magnesium having a high specific strength for the cushion frame. In that case, even if the surface pressure rigidity as a countermeasure against side collision can be ensured by providing ribs etc. in the cushion frame, the rigid body of the cushion frame has a low elongation rate due to the characteristics of the material with low elongation. Energy absorption is insufficient, displacement is small, and fracture mode is poor.
[0004]
Therefore, it is conceivable to provide a deformable connecting member 2 at the front portion of the cushion frame 1 as shown in FIG. The upper part 2 a of the connecting member 2 is fixed to the side surface of the cushion frame 1, and the lower part 2 b of the connecting member 2 is fixed to the base member 5 rising from the upper rail 4 of the seat slide device 3. The upper rail 4 is movable in the front-rear direction with respect to the lower rail 6 and can be fixed at a desired position by a lock mechanism 7.
[0005]
[Problems to be solved by the invention]
However, even if such a connecting member 2 is provided, the connecting member 2 is located outside the base member 5 (indicated by an arrow B) when a passenger's load is applied from above the cushion frame 1 as indicated by an arrow A in the event of a collision. Direction). In this case, the lock member 8 of the seat slide device 3 tends to be displaced inward (that is, in a direction (arrow C direction) in which the engagement strength between the lock member 8 and the lock hole 8a is weakened). Further, when the rib 1a provided on the lower surface of the cushion frame 1 is displaced downward, the rib 1a may interfere with a part of the lock mechanism 7 (for example, the release lever 9), which is not preferable.
[0006]
Accordingly, it is an object of the present invention to provide a vehicle that has sufficient rigidity with respect to a load from the side direction and that can effectively absorb an impact load input at the time of a frontal collision and reduce a load acting on an occupant. It is in providing a sheet apparatus for an operation.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a vehicle seat device according to the present invention includes a metal cushion frame having a rib extending in the width direction of a vehicle on a lower surface, a lower rail, an upper rail slidable in the front-rear direction with respect to the lower rail, and the upper rail. A seat slide device including a lock mechanism for fixing at a desired front-rear direction position, a base member provided on the upper rail and positioned on both left and right sides of the cushion frame, an upper portion fixed to the base member, and lower than the upper portion An impact buffer which also has a lower part fixed to the cushion frame at a position and which also serves as a connecting member having a bent portion between the two parts, and is opposed to the end surface of the rib below the impact buffer And a spacer provided on the upper rail or the base member at a position.
[0008]
As the cushion frame, a cushion pan that is lightweight and rigid by integrally forming a light metal (for example, magnesium alloy) having a high specific strength into a pan shape (dish shape) is suitable. In the cushion device according to the present invention, when a forward collision of the vehicle is assumed, a load is input downward from the human body to the cushion frame reinforced with ribs. As the cushion frame moves downward, the impact buffer body is plastically deformed while being regulated by the spacer, thereby absorbing the energy of the cushion frame that is going to be displaced downward.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
A vehicle seat device 10 shown in FIG. 1 includes a cushion pan 11 made of a magnesium alloy as an example of a light metal having a high specific strength as an example of a light metal cushion frame. The cushion pan 11 integrally includes a bottom wall 12, left and right side walls 13, 14, a front wall 15, a rear wall 16, and a rib 17, and is integrally formed by casting such as die casting. .
[0010]
The ribs 17 formed on the lower surface side of the bottom wall 12 are along the vehicle width direction. The rib 17 improves the rigidity of the cushion pan 11 against a side collision and a front collision. A pair of left and right mounting holes 20 and 21 are formed in the front portion of the bottom wall 12. A pair of left and right mounting holes 22 and 23 are formed in the rear portion of the bottom wall 12.
[0011]
The cushion pan 11 is directly fixed to a vehicle floor side member 31 (only a part of which is shown in FIG. 2) via a seat slide device 30, or an adjustment mechanism such as a seat lift (not shown). And fixed to a member on the floor side of the vehicle.
[0012]
The seat slide device 30 includes a pair of left and right slide units 35 and 36 as shown in FIG. As shown in FIG. 3, the first slide unit 35 located on the left side of the seat device 10 includes a C-shaped lower rail 40 and an inverted T-shaped upper rail that is movably inserted in the front-rear direction with respect to the lower rail 40. 41, and a first lock mechanism 42 for fixing the upper rail 41 to a desired position in the front-rear direction with respect to the lower rail 40. A front base member 45 that rises upward is fixed to the front portion of the upper rail 41 by welding or the like. A mounting hole 46 (shown in FIGS. 1 and 2) is formed in the front base member 45. A rear base member 47 extending upward is fixed to the rear portion of the upper rail 41 by welding or the like. A hinge shaft 48 and a mounting hole 49 are provided in the rear base member 47. A seat back (not shown) can rotate in the front-rear direction about the hinge shaft 48.
[0013]
As shown in FIG. 3 and the like, the first lock mechanism 42 inserts the operation rod 52 having the release lever 51, the lock member 53 provided on the operation rod 52, and the distal end portion 53 a of the lock member 53 into the lock hole 54. A spring 55 (shown in FIG. 2) that biases in the direction is provided.
[0014]
The operation rod 52 is supported by a support member 56 fixed to the upper rail 41 so as to be rotatable in the direction of arrow R shown in FIG. Therefore, the operation rod 52 and the lock member 53 can move in the front-rear direction together with the upper rail 41 with respect to the lower rail 40. In the flange portion 57 provided at the lower end of the upper rail 41, a receiving hole 58 into which the distal end portion 53a of the lock member 53 is inserted is formed.
[0015]
The lock holes 54 formed in the lower rail 40 are formed at a plurality of positions with a predetermined pitch in the front-rear direction of the lower rail 40, and when the upper rail 41 is moved to a desired position in the front-rear direction with respect to the lower rail 40, the lock hole 54 is locked at the desired position. By fitting the lock member 53 into the hole 54, the upper rail 41 can be fixed at a desired position in the front-rear direction. When the release lever 51 is rotated in the direction of arrow D in FIG. 3, the lock member 53 is released from the lock hole 54 and the receiving hole 58 to release the lock, and the upper rail 41 can move in the front-rear direction.
[0016]
A second slide unit 36 (shown in FIG. 1) located on the right side of the seat apparatus 10 includes a hat-shaped lower rail 60 and a C-shaped upper rail 61 that is movably fitted to the lower rail 60 in the front-rear direction. And a second locking mechanism 62 for fixing the upper rail 61 to a desired position in the front-rear direction with respect to the lower rail 60. A lower base member 63 is fixed to the upper rail 61 by welding or the like. The base member 63 rises substantially perpendicular to the upper surface of the upper rail 61. Attachment holes 64 and 65 are formed in the front part and the rear part of the base member 63, respectively. A bracket 66 for attaching a reclining mechanism (not shown) is provided at the rear end portion of the base member 63.
[0017]
Similar to the first lock mechanism 42, the second lock mechanism 62 urges the lock member 71 provided on the operation rod 70 and the tip of the lock member 71 to be inserted into a lock hole (not shown). And a spring 73 or the like. The lock member 71 of the lock mechanism 62 can be rotated in conjunction with the lock member 53 of the first lock mechanism 42 via an interlocking member 74 such as a wire (only part of which is shown in FIG. 3). Yes. That is, when the release lever 51 is operated in the unlocking direction (the direction indicated by the arrow D in FIG. 3), the lock members 53 and 71 of the left and right lock mechanisms 42 and 62 are locked in synchronization with each other via the interlocking member 74. Move in the release direction.
[0018]
The front portion of the cushion pan 11 is fixed to the base members 45 and 63 by an impact buffer 80 that also serves as a pair of left and right connecting members. The impact buffer 80 is made of a metal having a high strength against a tensile load such as steel, and includes an upper portion 83 formed with a hole 82 through which a fixing component such as a bolt 81 is inserted, and a fixing component such as a bolt 84. A lower portion 86 in which a hole 85 to be inserted is formed, and a bent portion 87 formed between the upper portion 83 and the lower portion 86 are provided.
[0019]
A bolt 81 is passed through the mounting hole 46 formed in one base member 45, the bolt 81 is inserted into a hole 82 formed in the upper part 83 of one shock absorber 80, and the nut 88 is tightened. Further, the bolt 84 is inserted into the hole 85 formed in the lower part 86 of the shock absorber 80 and the mounting hole 20 of the cushion pan 11, and the nut 89 is tightened, whereby the front portion of the cushion pan 11 is interposed via the shock absorber 80. The left side is supported by one base member 45.
[0020]
A bolt 81 is passed through a mounting hole 64 formed in the other base member 63, the bolt 81 is inserted into a hole 82 formed in the upper portion 83 of the other shock absorber 80, and a nut 88 is tightened. Further, the bolt 84 is inserted into the hole 85 formed in the lower portion 86 of the shock absorber 80 and the mounting hole 21 of the cushion pan 11, and the nut 89 is tightened so that the front portion of the cushion pan 11 is interposed via the shock absorber 80. The right side is supported by the base member 63.
[0021]
As representatively shown in FIG. 3 as one shock absorber 80, the bent portion 87 has a crank shape such that the upper portion 83 extending in the vertical direction is higher than the lower portion 86 extending in the left-right direction when viewed from the front of the vehicle. It has a staircase shape. In other words, the bent portion 87 has a horizontal wall 87 a that continues to the upper portion 83 and a vertical wall 87 b that continues to the lower portion 86. For this reason, the cushion pan 11 is supported in a fashion suspended from the base members 45 and 63 by the pair of left and right shock absorbers 80. These shock absorbers 80 can absorb the energy of a frontal collision.
[0022]
The rear part of the cushion pan 11 is supported by the base members 47 and 63 by a pair of left and right connecting members 90. These connecting members 90 are bent in an L shape so as to have a vertical wall 91 and a horizontal wall 92. A fixing part such as a bolt 94 is inserted into the mounting hole 49 formed in one base member 47, and the bolt 94 is inserted into the hole 93 formed in the vertical wall 91 of the connecting member 90 to tighten the nut 95. Further, the bolt 97 is inserted into the hole 96 formed in the lateral wall 92 of the connecting member 90, and the bolt 97 is inserted into the mounting hole 22 of the cushion pan 11 to tighten the nut 98. By doing so, the rear left side of the cushion pan 11 is supported by the base member 47 via the connecting member 90.
[0023]
A fixing component such as a bolt 94 is inserted into the mounting hole 65 formed in the other base member 63, and the bolt 94 is inserted into the hole 93 formed in the vertical wall 91 of the other connecting member 90 to tighten the nut 95. . Further, the bolt 97 is inserted into the hole 96 formed in the lateral wall 92 of the connecting member 90, and the bolt 97 is inserted into the mounting hole 23 of the cushion pan 11 to tighten the nut 98. By doing so, the rear right side of the cushion pan 11 is supported by the base member 63 via the connecting member 90.
[0024]
A spacer 100 made of a metal such as steel is provided on the upper rail 41 of one slide unit 35 at a position below the impact buffer 80 and facing the end surface 17a of the rib 17. The base member 63 of the other slide unit 36 is also provided with a spacer 100 made of a metal such as steel at a position below the impact buffer 80 and facing the end surface 17b of the rib 17.
[0025]
Each of the spacers 100 includes a pair of front and rear leg portions 101 and 102, a vertical wall 103 that connects the leg portions 101 and 102, an attachment portion 104 that is welded to the upper rail 41 or the base member 63, and the like. The vertical wall 103 of one spacer 100 faces one end surface 17 a of the rib 17, and the vertical wall 103 of the other spacer 100 faces the other end surface 17 b of the rib 17. A dowel 105 is formed on each of the legs 101 and 102 to increase the rigidity against bending.
[0026]
Assuming a frontal collision of the vehicle, a load A (shown in FIG. 3) is input to the cushion pan 11 reinforced by the ribs 17 downward from the human body. As the cushion pan 11 moves downward, the impact buffer 80 is plastically deformed while its downward movement is restricted by the spacer 100. That is, when the shock buffer 80 is deformed while being stretched so as to exhibit a certain amount of displacement at a constant load, the energy of the cushion pan 11 that is going to be displaced downward is absorbed, and the load on the human body is reduced.
[0027]
At this time, the shock absorber 80 is deformed in a direction (indicated by an arrow E) in which the base members 45 and 63 (represented by one of the base members 45 in FIG. 3) are drawn inward. The lock members 53 and 71 tend to be displaced in the direction of further entering the lock hole 54. As a result, the occurrence of unlocking of the seat slide device 30 at the time of a frontal collision is avoided. In addition, by providing the spacer 100 facing the end surface 17a of the rib 17 on the upper rail 41, the rib 17 is unlocked with respect to a part of the lock mechanism 42 such as the release lever 51 when the cushion pan 11 is displaced downward. Interference is avoided.
[0028]
In a vehicle provided with the seat device 10 of this embodiment, in a side collision, a load from the outside of the vehicle body is input to the rib 17 of the cushion pan 11 through the spacer 100 via the base members 45 and 63, the upper rails 41 and 61, and the like. Therefore, the necessary load within a certain amount of displacement is ensured, and the load on the occupant is reduced.
[0029]
Needless to say, in implementing the present invention, the constituent elements of the present invention such as a cushion frame, a seat slide device, a base member, an impact buffer, and a spacer can be appropriately changed.
[0030]
【The invention's effect】
According to the first aspect of the present invention, the load input to the cushion frame at the time of collision is input to the impact buffer that connects the base member of the seat slide device and the cushion frame, and the impact buffer is plastically deformed. The impact energy input at the time of a forward collision can be effectively absorbed. Moreover, it can suppress by a spacer that the rib of a cushion frame interferes with a seat slide apparatus. Rigidity is secured by the ribs provided on the cushion frame for the door part that enters the inside of the vehicle at the time of a side collision, and the load acting on the occupant is reduced, such as energy is absorbed by the base member and spacers. be able to. According to the second aspect of the present invention, in addition to the effect of the first aspect, it is possible to provide a vehicle seat device including a lightweight cushion pan made rigid.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a vehicle seat device showing an embodiment of the present invention.
FIG. 2 is a side view of the vehicle seat device shown in FIG.
FIG. 3 is a partial cross-sectional view of the seat device along line F3-F3 in FIG.
FIG. 4 is a partial cross-sectional view of a conventional vehicle seat device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Vehicle seat apparatus 11 ... Cushion pan (an example of a cushion frame)
17 ... Ribs 30 ... Seat slide devices 45, 63 ... Base member 80 ... Shock absorber 100 ... Spacer

Claims (2)

A metal cushion frame having ribs extending in the width direction of the vehicle on the lower surface;
A seat slide device including a lower rail, an upper rail that is slidable in the front-rear direction with respect to the lower rail, and a lock mechanism that fixes the upper rail in a desired front-rear position;
Base members provided on the upper rail and located on the left and right sides of the cushion frame;
An impact buffer which also has an upper part fixed to the base member and a lower part fixed to the cushion frame at a position lower than the upper part and also serves as a connecting member having a bent part between the two parts;
A spacer provided on the upper rail or the base member at a position below the impact buffer and facing the end face of the rib;
A vehicle seat device comprising: 2. The vehicle seat device according to claim 1, wherein the cushion frame is a light alloy cushion pan in which a bottom wall, both side walls, a front wall, a rear wall, and the rib are integrally formed.

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