JP4498125B2 - Vehicle seat structure - Google Patents

Description

  The present invention relates to a seat structure in a vehicle such as a passenger car, a commercial vehicle, a bus or a truck.

The vehicle seat is generally connected to the right and left lateral frame members, the front frame member coupled across the front of the right and left lateral frame members, and the rear frame member coupled across the rear of the right and left lateral frame members. A seat portion of the seat is configured by including a frame member and a pad member.
In this case, for example, in the right seat (driver's seat), the seat belt anchor is attached to the right lateral frame member or the vehicle body fixing portion at the rear portion of the seat portion of the seat, and the left lateral frame member or the vehicle body is fixed. A buckle to which a seat belt bracket is connected is attached to the portion.

JP 2002-59770 A

  In the state where the occupant sits on the seat as described above and the seat belt is mounted (the seat belt bracket is attached to the buckle), if the vehicle collides from the front, the occupant tries to move forward due to inertia. However, the seat belt prevents the occupant from moving forward.

In this case, if a large force is applied forward from the occupant to the seat belt (the portion between the anchor and the buckle of the seat belt), the portion near the anchor of the seat belt and the portion near the buckle When trying to incline toward the inward side of the seat, it may be in a state where it is strongly pressed against the right and left side of the rear part of the seat part toward the inward side of the seat part of the seat, thereby The rear portion of the left horizontal frame member may be deformed so as to fall inward of the seat portion of the seat.
When the rear part of the right and left horizontal frame members is deformed so as to fall down inward of the seat part of the seat, the waist part of the occupant by the seat belt (the part between the anchor and the buckle of the seat belt) correspondingly. As a result, the occupant's waist tends to move forward along the seat.

  In the vehicle seat structure according to the present invention, when a vehicle collides from the front in a state where an occupant is seated on the seat and the seat belt is attached (a state in which the metal fitting of the seat belt is attached to the buckle), It aims at preventing the state which tries to move ahead along a seat part.

[I]
(Constitution)
The first feature of the present invention resides in the following configuration in the vehicle seat structure.
A right and left lateral frame member, a front frame member coupled across the front of the right and left lateral frame members, a rear frame member coupled across the rear of the right and left lateral frame members, and a pad member. The seat portion of the seat is provided. Seat belt anchors are attached to one of the right or left lateral frame members at the right or left side of the rear part of the seat seat or to the fixed part of the vehicle body, and right at the other of the right or left side at the rear of the seat part. Alternatively, a buckle to which a seat belt bracket is connected is attached to the other of the left lateral frame member or the fixing portion of the vehicle body. With the seat belt bracket connected to the buckle, the right and left horizontal frame members facing each other with the seat belt facing upwards so that the bottom is located below the upper side of the right and left horizontal frame members The right and left cutouts formed open to the seat belt, or the seat belt or buckle to be inclined inward of the seat portion of the seat is configured to be able to enter the right and left cutouts , the connecting portion of the frame member after the right and left lateral frame members, so as to be positioned below the upper portions of the right and left lateral frame members, right and left switching of the right and left lateral frame members and extending below the out portion connected to the lateral frame members of the right and left.

(Function)
When the vehicle collides from the front in a state where an occupant is seated on the seat and the seat belt is attached (with the seat belt bracket attached to the buckle), the seat belt (the portion between the seat belt anchor and the buckle) On the other hand, a large force is applied from the occupant toward the front, and the portion near the anchor of the seat belt and the portion near the buckle are inclined toward the inward side of the seat portion of the seat. It is assumed that the left side portion is strongly pressed toward the inner side of the seat portion of the seat.

  According to the first aspect of the present invention, the seat belt bracket is connected to the buckle, and the right and left lateral frame member portions facing each other are inclined to the inward side of the seat portion of the seat. It has a notch that allows a seat belt or buckle to enter. Even if it becomes a state as mentioned above by this, since it will be in the state where the part near the anchor of a seat belt and the part near a buckle (or buckle) enter into the notch part of the right and left horizontal frame members, The state in which the rear portions of the right and left horizontal frame members are about to be tilted toward the inner side of the seat portion of the seat is weakened by the amount of entering.

  Further, according to the first aspect of the present invention, in the rear frame member connected over the rear portions of the right and left horizontal frame members, the connecting portions of the rear frame members to the right and left horizontal frame members are connected to the right and left sides. It extends below the notch of the left lateral frame member. Accordingly, the vicinity of the notches of the right and left horizontal frame members is reinforced by the connecting portions of the rear frame members to the right and left horizontal frame members, so that the rear portions of the right and left horizontal frame members are seats. This prevents a state in which the seat is about to fall down on the inner side. For example, a force for tilting the rear part of the right and left horizontal frame members toward the inner side of the seat portion of the seat is transmitted from the connecting portion of the rear frame member to the rear frame member. A state similar to a state in which a reinforcing frame such as a tension rod is connected to the lower part of the notch of the horizontal frame member is obtained.

In this case, the connecting portion of the rear frame member to the right and left horizontal frame members does not extend below the notches of the right and left horizontal frame members, but the right and left side frames as described above. It is also conceivable to connect the reinforcing frame over the lower part of the notch of the frame member. However, such a configuration is not preferable in terms of sitting comfort because the reinforcing frame is positioned below the seating point of the occupant in the seat portion of the seat.
According to the first aspect of the present invention, the rear frame member located behind the seating point of the occupant in the seat portion of the seat is effectively used, and the connecting portion of the rear frame member to the right and left lateral frame members (the seat The right and left lateral sides from the seating point of the occupant in the seat) extends below the notches of the right and left lateral frame members, so that the right and left The vicinity of the notch of the left lateral frame member can be reinforced.

(The invention's effect)
According to the first feature of the present invention, in the vehicle seat structure, when a vehicle collides from the front in a state where an occupant is seated on the seat and the seat belt is attached (a state in which the metal fitting of the seat belt is attached to the buckle), The portion near the anchor of the seat belt and the portion near the buckle can prevent the rear portion of the right and left lateral frame members from being inclined to the inward side of the seat portion of the seat. It has become possible to prevent the lower back of the seat from moving forward along the seat of the seat.

  1 and 2 show a seat (driver's seat) of a passenger car, and the seat includes a seat portion 1, a backrest portion 2, and a headrest 3. The right and left lower rails 5 are fixed to the floor 4 in the front-rear direction, and the right and left upper rails 6 are supported along the right and left lower rails 5 so as to be movable and fixed in the front-rear direction. A right lateral frame member 7 (right door side) and a left lateral frame member 8 (right and left center side of the vehicle body) are connected to the right and left upper rails 6, and the right and left lateral frame members 7, A front frame member 9 is connected over the front portion of 8, and a rear frame member 10 is connected over the rear portions of the right and left horizontal frame members 7, 8.

  As shown in FIGS. 1 and 2, the spring member 11 is configured by bending a linear spring material many times in an S shape so that linear portions and semicircular arc portions are alternately arranged. Two spring members 11 are installed over the right and left horizontal frame members 7 and 8. The pad member 12 is made of foamed urethane or the like, and the back surface of the pad member 12 is placed on the right and left horizontal frame members 7, 8, the front frame member 9, the rear frame member 10, and the spring member 11. The backrest portion 2 is connected to the rear portions of the right and left horizontal frame members 7 and 8 via a recliner portion 13. The seat 1 of the seat is configured as described above.

  As shown in FIGS. 1, 2, and 3 (a), on the right side (right door side) of the rear portion of the seat portion 1 of the seat, an anchor 14 is attached to a fixed portion of the vehicle body close to the floor 4, and the seat belt 15 Is connected to the anchor 14, and a metal fitting 18 is inserted into the seat belt 15. A buckle base portion 16 is attached to the rear portion of the left lateral frame member 8 on the left side of the rear portion of the seat portion 1 (the left and right center side of the vehicle body), and a buckle 17 is connected to the buckle base portion 16.

  As shown in FIGS. 1, 2, and 3 (A), in the state where the occupant is seated on the seat and the seat belt 15 is attached (the bracket 18 of the seat belt 15 is attached to the buckle 17), the seat belt 15 (seat A notch portion 7 a is formed upward in the portion of the right lateral frame member 7 that opposes the anchor 14 in the vicinity of the anchor 14 of the belt 15, and the left lateral frame member 8 that opposes the buckle 17 and the buckle base portion 16. A notch 8a is formed upward in the portion.

  As shown in FIGS. 1, 2, and 3 (a), the rear frame member 10 is formed in a semi-pipe shape by bending a plate material into a semicircular cross section. A connecting portion 10a of the rear frame member 10 to the right and left horizontal frame members 7 and 8 extends forward, and extends along the lower side of the notches 7a and 8a of the right and left horizontal frame members 7 and 8. The connecting portion 10 a of the rear frame member 10 is connected to the right and left horizontal frame members 7, 8.

  As a result, as shown in FIGS. 2 and 3 (a), in the state where the occupant is seated on the seat and the seat belt 15 is mounted (the bracket 18 of the seat belt 15 is attached to the buckle 17), the vehicle moves forward. From the passenger, a large force is applied to the seat belt 15 (the portion 15a between the anchor 14 and the buckle 17 of the seat belt 15) from the occupant forward, and the portion of the seat belt 15 near the anchor 14 and The portion near the buckle 17 (or the buckle 17 or the buckle base portion 16) is inclined to the inward side of the seat portion 1 of the seat, and the right side and the left side of the seat portion 1 of the seat are located inside the seat portion 1 of the seat. Suppose that it is in a state where it is strongly pressed toward the other side.

  In this case, as shown in FIG. 3 (b), the portion near the anchor 14 and the portion near the buckle 17 (or the buckle 17 and the buckle base portion 16) of the seat belt 15 are formed on the right and left horizontal frame members 7, 8. Since the cut-out portions 7a and 8a are in a state of entering, the rear portions of the right and left horizontal frame members 7 and 8 are inclined to the inner side of the seat portion 1 of the seat by the amount of the cut-in portions 7a and 8a. The state to do is weakened. Further, the vicinity of the notches 7a and 8a of the right and left horizontal frame members 7 and 8 is reinforced by the connecting portion 10a of the rear frame member 10 to the right and left horizontal frame members 7 and 8, The state in which the rear portions of the right and left horizontal frame members 7 and 8 are about to be tilted toward the inner side of the seat portion 1 of the seat is prevented.

[First Alternative Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], a configuration as shown in FIG.
As shown in FIG. 4, the rear frame member 10 is formed in a semi-pipe shape by bending a plate material in a semicircular cross section, and a connecting portion 10 a of the rear frame member 10 to the right and left horizontal frame members 7, 8. Is extended forward so that the front end of the connecting portion 10a of the rear frame member 10 is located immediately below the rear end of the notches 7a, 8a of the right and left horizontal frame members 7, 8. A connecting portion 10 a of the rear frame member 10 is connected to the right and left horizontal frame members 7 and 8. Moreover, you may comprise so that the front-end part of the connection part 10a of the rear frame member 10 may be located just under the intermediate part of the notch parts 7a and 8a of the right and left horizontal frame members 7 and 8. FIG.
Even in such a configuration, the cutout portions 7a and 8a of the right and left horizontal frame members 7 and 8 and the connecting portion 10a of the rear frame member 10 are the same as the above-mentioned [Best Mode for Carrying Out the Invention]. Effects can be obtained.

[Second Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention] [First Alternative Embodiment], the spring member 11 is eliminated, and the right and left lateral frame members 7, 8 and the front and rear frame members 9, You may comprise so that the space enclosed by 10 may be used as a container space. With this configuration, the pad member 12 can be lifted upward around the front fulcrum (a fulcrum in the vicinity of the front frame member 9), and a basket-like container (not shown) with a handle can be formed as described above. What is necessary is just to comprise so that it can install and remove in space.
Even in such a configuration, the above-mentioned [Best Mode for Carrying Out the Invention] [Invention] is achieved by the notches 7a and 8a of the right and left horizontal frame members 7 and 8 and the connecting portion 10a of the rear frame member 10. The effect similar to that of the first alternative embodiment] is obtained.

[Third Another Embodiment of the Invention]
On the right side (right door side) of the rear portion of the seat portion 1 of the above-mentioned [Best Mode for Carrying Out the Invention] [First Alternative Embodiment] [Second Alternative Embodiment] The anchor 14 is attached to the rear portion of the right lateral frame member 7, and on the left side (the left and right center side of the vehicle body) of the seat portion 1 of the seat, on the fixing portion of the vehicle body near the rear portion of the left lateral frame member 8, You may comprise so that the buckle base 16 and the buckle 17 may be attached.
With this configuration, in the state where the occupant is seated on the seat and the seat belt 15 is mounted (the bracket 18 of the seat belt 15 is attached to the buckle 17), the seat belt 15 (the portion near the buckle 17 of the seat belt 15). ) Or the buckle 17 comes to face the notch 8a of the left lateral frame member 8.

[Fourth Embodiment of the Invention]
On the right side (right door side) of the rear portion of the seat portion 1 of the above-mentioned [Best Mode for Carrying Out the Invention] [First Alternative Embodiment] [Second Alternative Embodiment] The anchor 14 is attached to the fixed part of the vehicle body close to the floor 4, and on the left side (left and right center side of the vehicle body) of the seat seat 1, the fixed part of the vehicle body near the rear part of the left horizontal frame member 8 is You may comprise so that the buckle base 16 and the buckle 17 may be attached.
With this configuration, in the state where the occupant is seated on the seat and the seat belt 15 is mounted (the bracket 18 of the seat belt 15 is attached to the buckle 17), the seat belt 15 (the portion near the buckle 17 of the seat belt 15). ) Or the buckle 17 comes to face the notch 8a of the left lateral frame member 8.

[Fifth Embodiment of the Invention]
On the right side (right door side) of the rear portion of the seat portion 1 of the above-mentioned [Best Mode for Carrying Out the Invention] [First Alternative Embodiment] [Second Alternative Embodiment] The anchor 14 is attached to the rear portion of the right lateral frame member 7, and the buckle base portion 16 and the buckle 17 are attached to the rear portion of the left lateral frame member 8 on the left side (left and right center side of the vehicle body) of the rear portion of the seat portion 1 of the seat. You may comprise as follows.

[Sixth Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention] [First Alternative Embodiment of the Invention] to [Fifth Alternative Embodiment of the Invention], the connecting portion 10a is integrally formed with the rear frame member 10. However, the connecting portion 10 a may be configured separately from the rear frame member 10, and the connecting portion 10 a may be connected to the rear frame member 10.
The present invention can be applied not only to the seat (driver's seat) but also to the seat (passenger seat), the rear seat, the second row and the third row of the three-row seat type minivan, and the right and left lateral frame members 7. 8, and can be applied to all vehicle seats provided with front and rear frame members 9,10.

Overall perspective view of seat Side view with occupant seated on seat and seat belt attached (with seat belt bracket attached to buckle) (A) Vertical front view with the passenger seated on the seat and the seat belt attached (with the seat belt bracket attached to the buckle), (B) The passenger seated on the seat and seat belt attached Longitudinal front view when the vehicle collides from the front with the seat belt bracket attached to the buckle The side view in the state which the passenger | crew seated on the seat | sheet and the seatbelt was mounted | worn in the 1st another form of implementation of the invention (state which attached the metal fitting of the seatbelt to the buckle)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat part 7, 8 Right and left horizontal frame member 7a, 8a Notch part of right and left horizontal frame member 9 Front frame member 10 Rear frame member 10a Connection part of rear frame member 12 Pad member 14 Anchor 15 Seat belt 17 Buckle 18 Hardware

Claims (1)

A right and left horizontal frame member; a front frame member connected across the front of the right and left horizontal frame members; and a rear frame member connected across the rear of the right and left horizontal frame members And a pad member, constituting a seat portion of the seat,
A seat belt anchor is attached to one of the right or left lateral frame members or the fixing portion of the vehicle body at one of the right and left sides at the rear portion of the seat portion of the seat, and the other of the right and left sides at the rear portion of the seat portion of the seat. At the other side of the right or left lateral frame member or a fixed portion of the vehicle body, a buckle to which a seat belt bracket is connected is attached,
The bottom part is positioned below the upper side part of the right and left horizontal frame members at the right and left horizontal frame member parts facing the seat belts with the seat belt fittings connected to the buckle. The seat belt or buckle that is intended to incline toward the inward side of the seat portion of the seat can enter the right and left notch portions. To configure
The connecting portion of the frame member after the said right and left lateral frame members, so as to be positioned below the upper portion of the right and left lateral frame members, right and the right and left lateral frame members A vehicle seat structure extending below the left cutout and connected to the right and left lateral frame members .

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