JP2606730Y2 - Support mechanism for vehicle reclining 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 support mechanism for a vehicle reclining seat.

[0002]

2. Description of the Related Art As one type of vehicle reclining seat, as shown in a publication "Automotive Engineering Handbook, Vol. 6, page 1-26 (published by the Society of Automotive Engineers of Japan on September 30, 1983)", Each of the upper arms provided on the left and right sides of the seat back is connected to each of the lower arms provided at the rear of the left and right sheet trucks supporting the sheet cushion so as to be rotatable in the front-rear direction. There is a vehicle reclining seat in which a reclining mechanism is interposed in one of the connecting portions. A reclining seat of this type is a seat of a one-side reclining mechanism, and has the advantages of a smaller number of components, a simple structure, and a relatively low cost as compared with a seat of a double-side reclining mechanism.

[0003]

The reclining seat of this type has the above-mentioned advantages, but on the other hand, the one-side reclining mechanism receives the attacking force acting on the seatback. In addition, there is a problem that the strength is inferior to the seat of the reclining mechanism on both sides. Therefore, an object of the present invention is to address such a problem.

[0004]

According to the present invention, upper arms provided on the left and right sides of a seat back are pivoted in the front-rear direction on lower arms provided on the rear portions of left and right sheet tracks for supporting a sheet cushion. A reclining mechanism for a vehicle having a reclining mechanism interposed at one of the right and left connecting portions of the upper arm and the lower arm, and a seat track on a non-intervening side of the reclining mechanism. A lock plate provided with a long hole extending in the longitudinal direction of the sheet track, and having a wavy engagement portion at an upper edge and a lower edge of the long hole, and a member having a strength lower than that of the lock plate. A guide member having an elongated hole formed and extending in the longitudinal direction of the elongated hole, fitted to the elongated hole of the lock plate, and covering the upper and lower engagement portions of the elongated hole; A support bar having an upper end connected to a side portion of the reclining mechanism on the non-intervening side so as to be rotatable in a vertical direction and extending downward, and a sliding member provided at a lower end portion of the support bar and sliding into a long hole of the guide member. An engaging member is movably inserted and selectively engages with one of the upper and lower engaging portions of the lock plate when the guide member is broken.

[0005]

In the vehicle seat provided with the support mechanism having such a structure, the guide member fitted in the long hole of the lock plate is not provided when the vehicle is in a normal state where the vehicle does not receive an abnormal impact force. In the state of damage, it has the original function as a guide member. For this reason, the engagement member provided at the lower end of the support bar is in a state of being separated from both engagement portions of the lock plate, and is movable in the front-rear direction along the elongated hole of the guide member. For this reason, when the seat back is unlocked from the seat cushion by the reclining mechanism in order to adjust the inclination angle of the seat back in the front-back direction, the lower end of the support bar moves in the front-rear direction, and the seat back moves back and forth. By tilting in the direction, the tilt angle can be adjusted without hindrance.

On the other hand, when the vehicle receives an abnormal impact force, such as when the vehicle collides forward or when the vehicle collides with the rear part by a following vehicle, the seatback is abnormally moved forward or rearward. Receive impact force. When the seat back receives an abnormal impact force forward, the engaging member provided at the lower end of the support bar breaks the guide member, and the engaging member provided at the lower edge of the long hole of the lock plate engages with the engaging member. The seat bar is engaged and the support bar is supported by the lock plate, thereby preventing the seat back from falling forward. When the seatback receives an abnormal rearward impact force, the engaging member provided at the lower end of the support bar breaks the guide member and the engaging member provided at the upper edge of the long hole of the lock plate. And the support bar is supported by the lock plate to prevent the seat back from falling down.

Therefore, according to the supporting mechanism, the vehicle seat of the one-side reclining mechanism has a supporting strength equal to or higher than that of the vehicle seat of the double-side reclining mechanism. There is an advantage that the seat is relatively used as a vehicle seat of the both-side reclining mechanism, the number of components is small, the structure is simple, and the seat can be provided relatively inexpensively.

[0008]

1 and 2 show a back frame and a seat track of a vehicle seat having a support structure according to the present invention. ing. The seat includes left and right sheet tracks 11, which support a sheet cushion (not shown).
The upper arms 16, 17 provided at the lower end of a back frame 15, which constitutes a seatback (not shown), are connected to the lower arms 13, 14 provided at the rear of the rear frame 12 so as to be rotatable in the front-rear direction. 14 is configured with a reclining mechanism 18 interposed at the connecting portion. The reclining mechanism 18 is a well-known mechanism, and a detailed structure thereof is omitted in each drawing.

Accordingly, the vehicle seat is a seat of the one-side reclining mechanism, and the seat back is locked to the seat cushion by the locking action of the single reclining mechanism 18.
The tilt angle of the seat back in the front-rear direction can be adjusted by the lock release operation.

However, in the vehicle seat,
A support mechanism 20 is provided between the left seat track 11 and the back frame 15. The support mechanism 20 includes a first lock plate 21, a guide member 22, a support bar 23, and an engagement member 24 as main components. The first lock plate 21 is, as shown in FIGS.
a, and a lower end of the lower arm 13 is fixed to the front end of the lower arm 13 by a plate portion 21a. It is located outside the track 11. The first lock plate 21 has a predetermined length in the front-rear direction. The plate portion 21a is formed with a long hole 21c extending in the front-rear direction. 21d and 21e are formed. A portion of the lower arm 13 opposed to the long hole 21c of the plate portion 21a is formed with a long hole and an engaging portion having the same shape.
1c and the engaging portions 21d and 21e. Therefore, by combining the long hole and the engaging portion of these members, the long hole 2
1c and the engaging portions 21d and 21e.

The guide member 22 is made of a synthetic resin and has a lower breaking strength than other metal components. The guide member 22 has a plate portion 22a having a predetermined length and a plate portion 2 having a predetermined length.
2a, an inward flange portion 22c extending from the periphery of a long hole 22b formed in the longitudinal direction. Inward flange 22c
Is endless and has the same cylindrical shape as the elongated hole 22b. The inward flange portion 22c is the first lock plate 21
The guide member 22 is formed to have a size that fits in the long hole 21c, and the guide member 22 has the plate portion 22a of the first lock plate 21 in the plate portion 22a with the inward flange portion 22c fitted in the long hole 21c. 21a. In this state, the inward flange portion 22c covers both the engaging portions 21d and 21e of the first lock plate 21.

The support bar 23 has a length substantially equal to the length of the back frame 15 in the vertical direction, and is connected at the upper end thereof to the upper portion of the left frame portion 15a of the back frame 15 so as to be rotatable in the vertical direction. ing. The lower end of the support bar 23 is guided by a guide member 2 via a roller 24 as an engagement member.
2 are connected. The roller 24 is located in the long hole 22b of the guide member 22 in a state fitted on the stepped bolt 25a at the lower end of the support bar 23, and is pulled out by a nut 25b screwed to the tip of the stepped bolt 25a. It has been stopped. The roller 24 can slide or roll in the elongated hole 22b of the guide member 22.

In the support mechanism 20, the first
Second lock plate 2 engageable with lock plate 21
6 is provided. The second lock plate 26 has substantially the same length as the first lock plate 21, and has a plate portion 26a.
And an inverted U-shaped engaging portion 26b extending upward from a side edge thereof. The second lock plate 26 is fixed to the lower surface of the lower rail 11a of the seat track 11 by a plate portion 26a, and the hook portion 26b extends upward to fit into the hook portion 21b of the first lock plate 21. ing.

In the vehicle reclining seat provided with the support mechanism 20 having the above-described structure, the first lock plate 2 is provided when the vehicle is not subjected to an abnormal impact force.
The guide member 22 fitted in the one long hole 21c is in an undamaged state and has an original function as the guide member 22. For this reason, the roller 24 provided at the lower end of the support bar 23 is provided with both engagement portions 21 d of the first lock plate 21,
It is in a state of being separated from 21e, and is movable in the front-rear direction along the long hole 22b of the guide member 22. For this reason,
When the seat back is unlocked from the seat cushion by the reclining mechanism 18 in order to adjust the inclination angle of the seat back in the front-rear direction, the lower end of the support bar 23 moves in the front-rear direction to move the seat back back and forth. And the inclination angle can be adjusted without hindrance.

On the other hand, when the vehicle collides forward as shown in FIG. 5, the vehicle receives an abnormal impact force, and the seatback moves forward as indicated by an arrow due to the abnormal impact force. Receives abnormal shock force. When the seatback receives an abnormal impact force in the forward direction, the roller 24 provided at the lower end of the support bar 23 as shown in FIG.
And the engaging portion 21e provided on the lower edge of the elongated hole 21c of the first lock plate 21 is engaged, and the support bar 23 is supported by the first lock plate 21 to prevent the seat back from falling forward. Is done.

When the vehicle collides rearward as shown in FIG. 7, the vehicle receives an abnormal impact force and the seatback moves rearward as indicated by an arrow due to the abnormal impact force. Receives abnormal shock force. If the seatback receives an abnormal rearward impact force, the roller 24 provided at the lower end of the support bar 23 as shown in FIG.
And the engaging bar 21d is engaged with the engaging portion 21d provided on the upper edge of the long hole 21c of the first lock plate 21, and the support bar 23 is supported by the first lock plate 21 to prevent the seat back from falling down. Is done. In this case, when the impact force is extremely large, the lower arm 13 may be separated from the upper rail 11b of the seat track 11 via the first lock plate 21, but in this case, the first lock plate 21 is connected to the second lock plate. 26, the lower arm 13 is not peeled off from the upper rail 11b.
Securely support the seat back.

Therefore, according to the support mechanism 20, the vehicle seat of the one-side reclining mechanism has the same or higher support strength as the vehicle seat of the both-side reclining mechanism, and the vehicle having such a high support strength is provided. There is an advantage that the number of components is relatively small, the structure is simple, and the vehicle seat can be provided relatively inexpensively, as the vehicle seat of the reclining mechanism on both sides is comparatively used.

[Brief description of the drawings]

FIG. 1 is a side view showing a support mechanism for a vehicle reclining seat according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the support mechanism, a seat track of the seat, and a back frame.

FIG. 3 is a perspective view showing a lock plate and a guide member that constitute the support mechanism.

FIG. 4 is a vertical sectional front view of the support mechanism taken along the line 4-4 in FIG. 1;

FIG. 5 is a schematic diagram showing a frontal collision state of a vehicle equipped with a reclining seat provided with the support mechanism.

FIG. 6 is a side view showing an operation state of the support mechanism.

FIG. 7 is a schematic diagram showing a collision state of a following vehicle of a vehicle equipped with a reclining seat provided with the support mechanism.

FIG. 8 is a side view showing an operation state of the support mechanism.

[Explanation of symbols]

11, 12: seat track, 13, 14, lower arm, 15: back frame, 16, 17: upper arm, 18: reclining mechanism, 20: support mechanism, 21
... First lock plate, 21c ... Long hole, 21d, 21e
... engaging portion, 22 ... guide member, 22b ... long hole, 22c ...
Inward flange portion, 23: support bar, 24: roller, 26
... Second lock plate.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47C 1/024 B60N 2/42

Claims (1)

(57) [Scope of request for utility model registration] An upper arm provided on the left and right sides of a seatback is connected to lower arms provided on the rear portions of left and right sheet tracks for supporting a sheet cushion so as to be rotatable in the front-rear direction. A reclining seat for a vehicle, in which a reclining mechanism is interposed at one of the right and left connecting portions of the reclining mechanism and the lower arm. The seating track is provided on a sheet track on the non-intervening side of the reclining mechanism. A lock plate having a long hole extending in the longitudinal direction thereof and corrugated engagement portions at upper and lower edges of the long hole, and a longitudinal direction of the long hole formed of a member having a lower strength than the lock plate. A guide member having an elongated hole extending into the lock plate, the guide member being fitted into the elongated hole of the lock plate and covering the upper and lower engagement portions of the elongated hole; and the recliner in the seatback. A support bar that is connected to the non-intervening side of the non-intervening side at the upper end so as to be rotatable in the up-down direction and that extends downward; A support mechanism for a reclining seat for a vehicle, comprising an engaging member that is inserted and selectively engages with one of upper and lower engaging portions of the lock plate when the guide member is broken. .