JPH0539949Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a walk-in device for a vehicle seat.

[Prior Art] Generally, two-door type small cars are equipped with a walk-in device that slides the front seat forward in order to secure space for a passenger to get in and out of the rear seat.

[Problems to be solved by the invention] However, many walk-in devices use a sliding system using a seat adjuster, and the lower arm of the seat adjuster is long, so the lower arm is exposed to the floor during walk-in, and the foot touches it when getting on and off. It was dangerous.

Therefore, the object of the present invention is to provide a walk-in device for a vehicle seat by eliminating the lower arm to ensure the safety of the occupant's feet and improving operability during walk-in and seat return. .

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an upper frame fixed to the lower part of the seat cushion, and a lower frame slidably installed on the seat adjuster fixed to the body. a frame, a pair of front links and a rear link whose upper and lower ends are pivotally connected to the upper frame and the lower frame, and means for urging these links to rotate forward with respect to the lower frame. a means for biasing the lower frame forward with respect to the seat adjuster; a link lock mechanism that is unlocked in conjunction with the forward tilting of the seat back; and a link lock mechanism that is coupled to the forward rotation of the link. The present invention is characterized by comprising a slide lock mechanism of the lower frame which is unlocked by pressing the seat back, and a return mechanism which rotates the link rearward in conjunction with the return movement of the seat back.

[Operation] When the seatback is tilted forward during a walk-in, the link lock mechanism is first unlocked and each link rotates forward, and then the slide lock mechanism is unlocked and the lower frame is moved to the seat. The sheet slides on the adjuster and moves to the tip position. When returning the seat, when the seat bag is moved back, each link rotates rearward, and the link lock mechanism and slide lock mechanism are respectively locked.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

In Figures 1 and 7, 3 is seat back 1
With the reclining mechanism, the Atsupa Plate 1
One end of the outer cable 16 is attached to the upper part of the pivot point 1, and one end of the inner cable 17 is attached to the lower part of the pivot point of the plate 13, which is rotatably attached to the pivot point. It is being Further, an arm 4 is attached to the front part of the lower plate 12 of the reclining mechanism, and a knob 14 is attached to one end of the arm 4.
Grips 15 are connected to the other ends via cables 5, respectively.

In FIGS. 1 and 4, reference numeral 21 denotes an atsupa frame fixed to the lower part of the seat cushion 2;
Reference numerals 2 and 23 designate a pair of left and right lower frames that are slidably mounted on seat adjusters 41 and 42 that are fixed to the body, and these upper frames 21 and lower frames 22 and 23 are pivotally connected to each other. The front links 24, 24 and the rear links 25, 25 are connected by a tangle. A release lever 26 and a lock plate 30 are respectively fixed to both ends of a pipe 20 which is rotatably suspended horizontally in the longitudinal direction of the upper frame 21. Further, lower end portions of rear links 25 and 25 are fixed to a rear lower shaft 19 whose both ends are pivotally supported by lower frames 22 and 23. The lock plate 30 is normally attached to the shaft 1.
9 is locked.

As shown in FIG. 5, a release lever 31 is fixed to the front lower shaft 18 to which the lower ends of the front links 24, 24 are fixed and both ends are pivotally supported by the lower frames 22, 23. A pin 32 is fixed to.
In addition, as shown in FIG. 8, a pair of brackets 27, 27 are provided on the rear lower shaft 19 connecting the rear links 25, 25, on which a pin 33 is rotatably installed.
is fixed to the pin 33, and the tip of the outer cable 16 passes through and is engaged with the pin 33. Note that a bracket 28 is attached to the frame 34 that connects the lower frames 22 and 23.
The outer sheath of the outer cable 16 is fixed to this bracket 28. On the other hand, the inner cable 1
7 has its outer skin fixed to a bracket 35 attached to the upper frame 21, and its tip is locked to the release lever 26.

The front links 24, 24 are biased counterclockwise by one end of a return spring 29 wound around one end of the front lower shaft 18 coming into contact with a pin 32.

In addition, as shown in FIG. 5, the lower frame 23
A release lever 44 is provided at one end of the shaft 50 rotatably attached to the lower shaft 1.
A release link 45 is provided which comes into contact with the release lever 31 of No. 8, and the shaft 50 is biased by a spring 47 in a direction such that the release lever 44 rotates downward. Further, a claw member 52 having a claw 51 is integrally attached to the shaft 50. On the other hand, the seat adjuster 41 is provided with a plurality of engagement holes 53 that can be engaged with the pawls 51 . 46 is stretched between the seat adjuster 41 and the lower frame 23, and
This is a return spring that urges 3 forward. The slide lock mechanism shown in FIG. 5 is installed in a pair on the left and right, and the rotation of one shaft 50 is controlled by the release wire 43 shown in FIG.
and the other shaft having the same function.

As described above, in this walk-in device, the upper frame 21 and the seat portion can move forward and backward relative to the lower frames 22 and 23 by the rotation of the front link 24 and the rear link 25, and the lower frame 22 , 23 is the seat adjuster 4
1 and 41, the entire portion above the lower frames 22 and 23 can move forward and backward.

Next, the operation of the walk-in device will be explained.
In the normal use state of the seat shown in FIG. 1, the reclining mechanism 3 is locked and the lock plate 30 is attached to the rear lower shaft 1.
9, the front link 24 and the rear link 25 are prevented from rotating counterclockwise, and the claw member 52 is engaged with the seat adjuster 41 as shown in FIG. Since it is engaged with the hole 53, the lower frames 22, 23 are also prevented from sliding forward.

Therefore, when walking in, grip 1
By pulling 5 rearward or rotating knob 14 upward, the reclining mechanism 3 is unlocked and the seat back 1 is tilted forward. As a result, the plate 13 rotates counterclockwise and the inner cable 17 is pulled, and the release lever 26 whose tip is locked rotates counterclockwise, causing the pipe 20 to rotate and lock the lock plate. 30 rotates counterclockwise and separates from the lower pipe 19, releasing the lock. When the lock is released, the front link 24 and the rear link 25 are rotated counterclockwise by the biasing force of the return spring 29, so that the upper frame 21 and the seat move forward.

Additionally, along with the rotation of the front link 24,
Since the release lever 31 fixed to the front lower shaft 18 also rotates in the same direction as shown in FIG. 6, the release link 15 rotates upward, and as a result,
As the shaft 50 rotates and the claw 51 of the claw member 52 is disengaged from the engagement hole 53, the seat adjuster 41
The lock between the seat adjuster 4 and the lower frame 23 is released, and the portion above the lower frames 22 and 23 is moved by the biasing force of the return spring 46.
1 and slide forward to complete the walk-in slide as shown in Figure 2.

Next, in order to return the seat to its original position, when the seat back 1 is tilted backward, the inner cable 16, which is locked to the top plate 11 of the reclining mechanism, is pulled back.
Bracket 27 (Fig. 8)
Since the rear lower shaft 19 rotates through the
As shown in FIG. 3, the rear link 25 and the front link 24 are forcibly rotated clockwise, causing the upper frame 21 and the seat to move backward. During this backward movement, the reclining mechanism 3 is locked, and by pushing the seat back further, the lower frame 2
2 and 23 move backward on the seat adjuster 41, the links 24 and 25 further rotate, and the lock plate 30 is engaged and locked with the rear lower shaft 19. Furthermore, as the front link 24 rotates during this period, the release lever 31 returns to its original position as shown in FIG. 5 along with the rotation of the front lower shaft 18, so that the shaft 50 also
7, the pawl 51 engages with the engagement hole 53, the locking is completed, and the seat returns to the state shown in FIG.

In addition, in order to move the seat only in the front-rear direction in normal use, release lever 4 of shaft 50 can be used.
4, the claw 51 of the claw member 52, which rotates integrally with the shaft 50, is disengaged from the engagement hole 53 of the seat adjuster 41, thereby releasing the locked state.

[Effects of the invention] As described above, according to the invention, the amount of seat movement during walk-in is the sum of the rotation amount of the link and the sliding amount of the lower frame. Since the adjuster can be shortened, the lower rail of the conventional seat adjuster can be eliminated, and the safety of the occupant's feet can be ensured.

In addition, the link lock equipment and slide lock equipment are sequentially unlocked in conjunction with the forward tilting of the seat back, improving operability for the occupants.Furthermore, each link also returns in conjunction with the return movement of the seat back, so The return load becomes lighter, and the burden on the occupant can be reduced.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention;
The figure is a side view of the walk-in state, Fig. 3 is a side view of the state in the middle of return, Fig. 4 is a perspective view of the seat removed, Fig. 5 is a perspective view of the slide lock mechanism, and Fig. 6 7 is a partially enlarged side view of FIG. 1, and FIG. 8 is a perspective view taken in the direction of arrow B in FIG. 4. 1... Seat back, 2... Seat cushion, 21... Atsupa frame, 22, 23... Lower frame, 24... Front link, 25...
Rear link, 29...Return spring, 30
... Lock plate, 31 ... Release lever, 45
...Release link, 46...Return spring,
52...claw member, 53...engaging hole.

Claims (1)

[Scope of utility model registration request] The upper frame is fixed to the lower part of the seat cushion, the lower frame is slidably installed on the seat adjuster fixed to the body, and the upper and lower ends are pivotally connected to the upper frame and the lower frame. Each pair of front links and rear links, means for urging these links to rotate forward relative to the lower frame, and means for urging the lower frame forward relative to the seat adjuster. , a link lock mechanism that is unlocked in conjunction with the forward tilting of the seat back, a lower frame slide lock mechanism that is unlocked in conjunction with the forward rotation of the link, and a return movement of the seat back. A walk-in device for a vehicle seat, comprising a return mechanism that rotates the link rearward in conjunction with the return mechanism.