JPS5911645Y2 - Reclining adjuster for vehicle seats, etc. - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of the reclining adjuster attached to seats for vehicles such as two-door cars, and allows the seat back of the front seat to be folded forward when a rear seat passenger gets in and out of the vehicle. The object of the present invention is to provide a device which can correctly reset the seat back to the inclination angle that was set before it was tilted forward when the seat back is later stood up again, and which has a relatively simple structure.

For vehicle seats, various devices have been proposed for resetting the seatback to the inclination angle that was set before the seatback was folded forward when the seatback is raised. However, it is relatively complex and has the disadvantage of increasing costs.

The present invention provides a reclining adjuster that does not have the above-mentioned drawbacks by adopting the structure described in the claims of the utility model registration.

The structure of the present invention will be explained below with reference to the illustrated example.

1 and 2, a seat back side frame 3 is rotatably supported by a main shaft 2 on a seat cushion side frame 1. As shown in FIGS.

A ratchet 5 is cut out over a predetermined range on the lower end 4 of the seat back side frame 3 described above.

In the illustrated example, the ratchet 5 is cut directly into the seat back side frame 3, but as is well known, it may be a separate structure fixed by welding or screwing.

A pawl 7 having teeth 6 that mesh with the ratchet 5 described above is pivotally attached to the seat cushion side frame 1 by a shaft 8, and is moved between two positions: an engaged position where it engages with the ratchet 5, and a non-engaged position where it is completely separated. It is assembled so that it can be selectively swung.

A reclining lever 9 is rotatably supported on the main shaft 2 at a position outside the seat back side frame 3.

This reclining lever 9 has a long hole 10 and a pawl 7.
The elongated hole 10 has a pawl 7.
A pin 12 protruding from the side surface is fitted, and the pin 11
is brought into contact with the back surface 13 of the pawl 7.

The long hole 10 and pin 11 mentioned above, and the pin 12 of the pawl 7
and the back surface 13 have the structure described below.

That is, as shown in FIG. 3, the pin 12 is restrained by the inner wall of the elongated hole 10, and the back surface 13 is restrained by the pin 11, so that the swinging movement of the pawl 7 is restrained, and the reclining When the lever 9 rotates in the direction of arrow A, the locus of movement of the elongated hole 10 and pin 11 guides the pawl 7 in the direction of the arrow, bringing the teeth 6 of the pawl 7 to a non-meshing position where they are completely separated from the ratchet 5. On the other hand, when the lever 9 rotates in the direction of the arrow 8, the pawl 7 is guided in the two directions of the arrow, and the elongated hole 10 and the pin 11 are aligned so that the pawl 7 can be brought to the meshing position where the teeth 6 completely mesh with the ratchet 5. The positions and shapes of the pins 12 and the back surface 13 are set.

However, the length of the elongated hole 10 is provided with a free movement section whose length corresponds to the rotation angle θ of the reclining lever 9 shown in FIG. During movement, the elongated hole 10 and the pin 11 are arranged so as not to exert any action on the pin 12 of the pawl 7.

The rotation range of the above-mentioned rotation angle θ of the reclining lever 9 is determined by the rotation range of the pin 30 of the walk-in lever 25, as will be described later.
The rotation range is such that the memory plate 16 is completely removed from the engagement groove 18 of the memory plate 16.

Therefore, the ratchet 5 and the pawl 7 are engaged after the pin 30 and the engagement groove 18 are engaged.
The engagement is realized, and conversely, the separation between ratchet 5 and pawl 7 is
This is achieved after the pin 30 comes out of the engagement groove 18.

As is clear from the above description, the rotation range of the reclining lever 9 is such that at least the pawl 7 can be swung from the engaged position to the non-engaged position via the pin 12.

In FIGS. 1 and 2, a spring 14 is stretched between the reclining lever 9 and the seat cushion side frame 1, and constantly applies a rotational force to the lever 9 in the eight directions of arrows.

The spring 15 shown in FIG. 1 is a torsion spring interposed between the main shaft 2 fixed to the seat cushion side frame 1 and the seat back side frame 3. This applies a rotational force in the E direction, that is, a forward tilting force.

The above structure forms the seat back reclining adjuster device, and the reclining lever 9
When rotated in the direction of arrow A, ratchet 5 and pawl 7
The seat back is immediately tilted forward by the elasticity of the spring 15 acting on the seat back side frame 3, and the seat back is raised up while keeping the reclining lever 9 in the rotating position in the direction of arrow A. When the reclining lever 9 is released at a position where a desired inclination angle is reached, the lever 9 rotates in the eight directions of the arrow by the elasticity of the spring 14, and the pawl 7 engages with the ratchet 5 at the aforementioned position. This locks the seat back side frame 3, ie, the seat back, at the above-mentioned tilt angle position.

Adjustment of the inclination angle of the seatback while seated is also carried out by rotating the reclining lever 9 in the direction of arrow A, adjusting the seatback to the desired inclination angle, and then releasing the reclining lever 9. is located outside the reclining lever 9, and a memory plate 16 is rotatably fitted therein.

This memory plate 16 has one retaining groove 18 cut in the arcuate peripheral edge 17 in the radial direction.

A frictional engagement member 19 is interposed between the memory plate 16 and the seat back side frame 3 described above, which causes slippage only when a rotational moment of a predetermined value or more is applied.

The frictional engagement member 19 of the illustrated embodiment is the memory plate 1
6 and a U-shaped spring plate 20 fixed to the back surface of the seat back side frame 3.
1, and the leg end 22 of the spring plate 20 and the uneven notch 21
In the present invention, when the seat back side frame 3 is rotated with the memory plate 16 fixed by the walk-in lever 25 as described later, the leg end 22 and uneven notch 2
1 and the memory plate 16 is disengaged from the walk-in lever 25, the memory plate 16 and the seat back side frame 3 are constructed so that they can act as one unit. has been done.

The above-mentioned memory plate 16 and reclining lever 9
A fixing bracket 2 fixed to the seat cushion side frame 1 by a main shaft 2 and a pin 23 is provided between the
4 is arranged, and a walk-in lever 25 is rotatably supported on this fixed bracket 24 by a shaft 26.

The walk-in lever 25 has arm portions 27 and 28 extending in symmetrical directions, and a third arm portion 29 extending in a direction perpendicular to these arm portions 27 and 28. Part 27
A pin 30 that can be fitted into the engaging groove 18 of the memory plate 16 is provided protrudingly on the arm 28, and a pressing piece 32 that comes into contact with the back surface 31 of the aforementioned reclining lever 9 is formed on the arm 28. There is.

A wire attachment portion 33 is formed on the third arm portion 29, and a walk-in handle 36 shown in FIG.
The end portion 35 of the release wire 34 connected to the release wire 34 is locked, and the walk-in lever 25 is rotated in the direction of the arrow or in the direction of the arrow by operating the walk-in handle 36.

The rotation range of the walk-in lever 25 mentioned above is
The pressing piece 32 comes into contact with the back surface 31 of the reclining lever 9 when the lever is kept engaged with the ratchet 5, and the pin 30 engages with the groove 18 for engaging the memory plate 16.
the reclining lever 9 when the pin 30 has completely come out of the engagement groove 18 and the pawl 7 has swung to the non-meshing position with the ratchet 5.
The operating range of the walk-in handle 36 is also set to the range that allows the walk-in lever 25 to rotate as described above.

In the illustrated embodiment, the rotation of the walk-in lever 25 in the direction of the arrow is performed by the pulling force of the release wire 34 by operating the walk-in handle 36, and the rotation of the walk-in lever 25 in the direction of the arrow When the handle 36 is returned to the old position and the pulling force of the release wire 34 is dissipated, the restoring elasticity in the direction of the arrow C of the reclining lever 9 acting on the reclining lever 9 by the spring 14 provides the restoring elasticity.

The predetermined sections on both sides of the engagement groove 18 on the arcuate peripheral edge 17 of the memory plate 16 are such that when the pin 30 of the walk-in lever 25 is out of the engagement groove 18, the memory plate 16 is connected to the seat back side frame. 3, it is shaped so that it can either come into contact with the pin 30 or rotate away from the pin 30.

Further, at the position where the pin 30 is in contact with the arcuate peripheral edge 17, the pressing piece 32 of the arm portion 28 of the walk-in lever 25 presses the back surface 31 of the reclining lever 9, and the lever 9 ratchets the pawl 7. 5, the arcuate peripheral edge 17 is
The shape of is set.

Next, the operation of the present invention having the above-described structure will be explained.

FIG. 5 shows the operation when changing the inclination angle of the seat back from the state where the seat back is set at the desired inclination angle as shown in FIG. When the pawl 7 rotates in the direction, it rotates past the free movement section of the rotation angle θ as described above, and due to the action of the elongated hole 10, the pin 11, and the pin 12, the pawl 7
It swings in the direction of the arrow and is disengaged from the ratchet 5.
It is swung to the non-meshing position.

When the seat back is pushed forward or backward in this state, the seat back side frame 3 tilts to an arbitrary inclination angle using the main shaft 2 as a rotation axis.

At this time, in the memory plate 16, the walk-in lever 25 and the pin 30 are fitted into the engagement groove 18, and the walk-in lever 25 is supported by the fixed bracket on the seat cushion side and does not displace. The seat back side frame 3 remains in the position shown in the figure, and slippage occurs between the spring plate 20 serving as the frictional engagement member 19 and the uneven notch 21, and only the seat back side frame 3 tilts.

When the reclining lever 9 is released at the position where the seat back has reached the desired inclination angle, the lever 9 rotates in the direction of the arrow C by the elasticity of the spring 14 and returns to the previous upright position, and the pawl 7 also
The elongated hole 10, the pin 11, and the pin 12 lead to the engagement position where the ratchet 5 engages, and the seat back side frame 3 is locked, so that the seat back is adjusted to a desired inclination angle and fixed.

Next, FIGS. 6 and 7 show a so-called memorized system that resets the seat back to a preset inclination angle when the seat back is folded forward and then stood up again for the purpose of getting on and off the rear seat passengers. It shows a walk-in effect.

In order for the rear seat occupant to get on and off, after the front seat occupant leaves the seat, the walk-in handle 36 is rotated in the direction of the arrow H in FIG. 4, thereby generating a traction force in the direction of the arrow R on the release wire 34. let

Due to this traction force, the walk-in lever 25
9, the pressing piece 32 of the arm portion 28 rotates in the direction of the arrow.
presses the back surface 31 of the release lever 9 in the direction of arrow N.

This pressure causes the release lever 9 to rotate in the direction of arrow A, but within the range of the rotation angle θ mentioned above, the lever 9 only moves freely and does not have any effect on the pawl 7. By rotating the lever 25, the lever 25
The pin 30 is removed from the engagement groove 18 of the memory plate 16.

By pulling the release wire 34, the walk-in lever 2
5 further rotates, the release lever 9 is further rotated in the direction of arrow A by the pressing piece 32 until the lower end 10' of the elongated hole 10 comes into contact with the pin 12 of the pawl 7. In the same manner as above, the pawl 7 is swung to the non-meshing position where it is disengaged from the ratchet 5, and the seat back side frame 3, that is, the seat back is folded forward.

At this time, the memory plate 16 also moves forward together with the seat back side frame 3.

After the seat back is folded forward, the walk-in handle 3
6 to the position shown in FIG. 4, the release wire 3
4 is lost, and therefore the pressing force of the pressing piece 32 is also lost, so that the reclining lever 9 tends to return in the direction of arrow C due to the elasticity of the spring 14, as shown in FIG. The pin 30 of the arm portion 27 comes into contact with the arc-shaped peripheral edge 17 of the memory plate 16, and each member remains at the position shown in FIG. 7.

When the seatback is raised after the rear seat occupant has finished getting on and off, the memory plate 16 rotates together with the seatback side frame 3 in the direction of the arrow R due to the action of the frictional engagement member 19, as described above. The arcuate peripheral edge 17 of the memory plate 16 slides while abutting against the pin 30 of the walk-in lever 25, which is given a rotational force in the direction of the arrow by the elasticity of the spring 14.

When the aforementioned seat back side frame 3 and memory plate 16 continue to rotate in the direction of the arrow R, and the engagement groove 18 of the plate 16 is brought to the position of the pin 30, the pin 30 is fitted into the groove 18. Walk-in lever 25
is further rotated in the direction of the arrow G, and the release lever 9 is also rotated by that amount in the direction of the arrow 8, and the release lever 9 is at the position where the back surface 31 of the lever 9 comes into contact with the pressing piece 32 of the walk-in lever 25. Stop.

In this position, the release lever 9 brings the pawl 7 into the engagement position with the ratchet 5, the seat back side frame 3 is locked, this locked position is the position where the seat back was set before being folded forward, and the memory plate This means that the 16 engagement grooves 18 have memorized this position.

In the present invention, the shape and structure of each member can be changed in various ways within the range that can achieve the above-mentioned purpose and function of the present invention, and it goes without saying that the structure is not limited to the illustrated structure. .

In particular, the walk-in handle 36 and the release wire 34 are not limited to the attached structure shown in the drawings.
The release wire may be omitted and the walk-in handle 36 may be attached directly to the walk-in lever 25.

The present invention has the structure and operation described above, and includes a memory plate and a walk-in lever attached to the reclining adjuster device, and the memory plate is attached to the seat back frame side through a frictional engagement member, and the reclining adjuster device is attached with a memory plate and a walk-in lever. In addition, when the reclining lever is operated, the walk-in lever does not operate, and the memory plate can be automatically matched to the selected inclination angle. When operating the inlever, the reclining adjuster mechanism and memoryize mechanism can be unlocked without changing the relative position between the memory plate and the ratchet on the seatback frame side, and by raising the seatback, This has the effect of correctly resetting the inclination angle to that before forward tilting.

Further, it is sufficient to simply attach a memory plate and a walk-in lever to the reclining adjuster device, which makes the structure relatively simple and has the effect of keeping manufacturing costs low.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of one embodiment, Fig. 2 is a side view of the embodiment shown in Fig. 1 at rest, with the torsion spring omitted, and Fig. 3 shows the pawl and reclining lever. FIG. 4 is a perspective view of an example of a sheet to which the embodiment shown in FIG. 1 is applied;
The figure is a side view showing the state shown in Fig. 2 when the reclining adjuster is operated, with the torsion spring omitted, and Fig. 6 is a side view showing the state when the seatback is moved forward and the walk-in operation is performed, with the torsion spring not shown. The omitted side view, FIG. 7, is a side view when the seat back is further folded forward from the state shown in FIG. 6. 1...Seat cushion side frame, 2.
... Main shaft, 3 ... Seat back side frame, 4 ... Lower end, 5 ... Ratchet, 7 ... Pawl, 9 ... ...Reclining lever, 11...Pin, 16...
Memory plate, 17... Arc-shaped periphery, 18
...Engagement groove, 19...Frictional engagement member, 24...Bracket, 25...Walk-in lever, 27, 28...・Arm part, 30
...Pin, 31...Back, 32...
...Press piece, 36...Walk-in handle.

Claims (1)

[Scope of utility model registration request] A ratchet is formed at the lower end of the seat back side frame, which is rotatably supported by a main shaft on the seat cushion side frame. A reclining lever is rotatably supported on the main shaft, and a pin on the side of the pawl is engaged with the lever. The rotation range is such that the pawl can be swung to a non-meshing position via the pin, and a memory plate having one engagement groove on the arcuate periphery is rotatable on the main shaft. A friction engagement member is interposed between the memory plate and the seat back side frame, which causes slippage only when a rotational moment of a predetermined value or more is applied. A walk-in lever is rotatably supported on a bracket fixed to the
An arm portion having a pin that fits into the engagement groove of the memory plate and an arm portion having a pressing piece that contacts the back surface of the reclining lever are shaped to extend in substantially symmetrical directions, and the pin and the pressing piece are arranged in the same direction as described above. At the position where the ratchet and the pawl are engaged, the ratchet and the pawl are fitted into the respective engagement grooves and are placed in contact with the back surface of the reclining lever, and the walk-in handle is engaged with the walk-in lever. , the pressing piece of the walk-in lever presses the back of the reclining lever until the operating range of the handle disengages the pin of the walk-in lever from the engagement groove of the memory plate and rotates the pawl to the non-meshing position. A reclining adjuster for a vehicle, etc., characterized by having a range in which it can be rotated.