JPS6319372B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a walk-in device for a vehicle seat, and more specifically, the present invention relates to a walk-in device for a vehicle seat, and more specifically, it includes a sensing mechanism that detects the forward inclination of a seat back, and a front-rear sliding device that is operated based on the operation of this sensing mechanism. The present invention relates to a vehicle seat walk-in device including a locking mechanism that holds a locking mechanism in an unlocked state.

Conventionally, in two-door type automobiles, etc.
When a person seated on the rear seat side gets on and off, a walk-in device is adopted which tilts the seat back of the front seat forward and moves the front seat to the frontmost position, making it extremely easy to get on and off. As shown in FIG. 8 as an example, this conventional walk-in device has a bent portion 6 on one side of a seat cushion side rail 63 such as an upper rail of a front-rear sliding device 62.
6, and this bracket 6
5 and a memory plate 68 having a stopper member 69 that is guided by a notch 67 formed in the seat back and latched to a bent part 66, and one end of the memory plate 68 is pulled when the seat bag falls forward. 70, and the other end is connected to a connecting wire 71 of a locking mechanism of the front/rear slide device 62, respectively, so that when the forward fall sensing wire 70 is pulled, the connecting wire 71 of the locking mechanism is pulled. , after the stopper member 69 of the memory plate 68 is guided by the notch 67 and inserted inside the bending part 66, the stopper member 69 is inserted into the bracket 65.
The lock mechanism is held in an unlocked state by being locked inside the bent portion 66 of the lock mechanism.
Further, a pusher plate 73 is fixed to the vehicle body side slide rail 64 such as the lower rail of the longitudinal slide device 62, and when the memory plate 68 is pushed upward by the pusher plate 73, the Stopper member 69
The engagement state between the bracket 65 and the bent portion 66 is released, and the connecting wire 71 is pulled in the biasing direction by the action of a spring (not shown), so that the locking mechanism is held in the locked state. .

However, since the memory plate 68 is not fixed to the bracket 65 and is only pulled at both ends by the forward tilt sensing wire 70 and the connecting wire 71, the relationship between the memory plate 68 and the bracket 65 is unstable. In addition, the engagement state between the memory plate 68 and the bracket 65 is unstable, and there is a risk of movement due to vibration or momentum, making it difficult to set the memory plate 68, resulting in a lack of operational reliability. Since the memory plate 68 and the bracket 65 are not integrated into a unit, management is complicated, and the forward tilt sensing wire 70 that pulls the memory plate 68 is bent in the middle, so the forward tilt sensing wire 70 is easily damaged. .

An object of the present invention is to provide a new vehicle seat walk-in device that does not have the above-mentioned drawbacks.
This will become clear from the detailed description below with reference to the drawings.

1 to 4 schematically show an embodiment of a vehicle seat walk-in device according to the present invention, and this walk-in device 1 includes a seat back and forth slide device 2 (not shown) and a seat back. The front and rear slide device 2 includes a reclining mechanism 3 that is mounted so as to be tiltable forward, and a front and rear slide device 2 includes a vehicle body side slide rail 4 that is fixed to the vehicle body side, and a vehicle body side slide rail 4 that is fixed to the seat cushion side.
The seat cushion side slide rail 5 is slidably fitted to the front side of the seat cushion side, and a lock mechanism 6 for locking the seat cushion side slide rail 5 is provided.

Although detailed explanation of the lock mechanism 6 will be omitted,
A lock tooth row or lock groove formed on the seat cushion side slide rail 5 or the vehicle body side slide rail 4, respectively, and a groove or protrusion that can fit into the lock tooth row or lock groove. A locking lever 8 for operating the locking rod, and a spring 9 for biasing the locking mechanism 6 in the direction in which it is normally locked.One end of the locking lever 8 is equipped with a locking mechanism 31, which will be described later. A connecting connecting wire 10 is attached.

In this embodiment, the base 12 of the reclining mechanism 3 is shown with an extended front lower part and a flange 12a formed on the outer edge, but the base 12 may not have an extended front lower part. This base 12 is fixed to one side of the seat cushion side slide rail 5 of the longitudinal slide device 2. In addition, at the rear upper part of the base 12,
As shown in FIG. 2, a device arm 13 is rotatably provided. The device arm 13 consists of an arm part 15 for fixing the seatback frame and an angle adjustment part 16. A pin 17 is implanted in the angle adjustment part 16 of the device arm 13.
The pin 17 is inserted into an arc-shaped groove 19 formed in the base 12 facing on the circumference around the pivot shaft 18 of the device arm 13 of No. 7, and the rotation of the device arm 13 is controlled by the arc-shaped groove It is regulated within the range of the groove 19.

When the seat back is tilted forward based on the operation of the reclining mechanism 3, a sensing mechanism 21 is provided that senses the forward tilt of the seat back. Groove 19 as rotation regulation
Although a pin 17 that fits in is used, a separate pin may be formed. The sensing mechanism 21 consists of a connecting wire 23 having one end formed with a locking portion 22 that engages with the pin 17, and the other end of the connecting wire 23 is connected to a locking mechanism 31, which will be described later. Reference numeral 25 denotes a reclining lever, and the angle adjustment section 16 is unlocked or locked by operating the lever 25 up or down.

3 and 4 schematically show one embodiment of the locking mechanism 31, and in this embodiment, the locking mechanism 31 is shown as being provided on the front back side of the base 12. However, if the front lower part of the base 12 is not extended, it can also be provided on the seat cushion side slide rail 5 or the like. This locking mechanism 31
has a substantially horizontally extending substrate 32;
2, a rotating plate 33 is rotatably attached to the pivot pin 34, and a head 34a of the pivot pin 34
A coil spring 35 fitted between the rotary plate 33 and the rotary plate 33 normally urges the rotary plate 33 downward. Further, a push-up pin 36 and a locking pin 37 are formed on the rotating plate 33, and these push-up pins 36 and locking pins 37 are arranged in a circular arc shape with the center of the pivot pin 34 fitted therein. Hole 3
8 and a locking hole 39 are formed in the substrate 32, respectively. The push-up pin 36 is always fitted into the elongated hole 38 and restricts the entire rotation range of the rotating plate 33, and the locking pin 37 can only be rotated while it is fitted into the locking hole 39. Rotation of the moving plate 33 is restricted. Further, a guide portion 40 adjacent to the locking hole 39 of the rotating plate 33 and having a concave cross section and having the same curvature centered on the pivot pin 34 is provided from the outer edge of the base plate 32 toward the locking hole 39. The depth of the groove of this guide portion 40 is formed to become gradually shallower as it approaches the locking hole 39.

The lock pin 37 is formed to have a shorter length protruding below the rotating plate 33 than the push-up pin 36, and is configured to protrude above the rotating plate 33. The other end of the connecting wire 23 of the sensing mechanism 21 is connected to the rotating plate 3.
A through hole 42 for engagement is formed on a side different from the side on which the protrusion 41 of No. 3 is formed, and the connecting wire 10 connected to one end of the lock lever 8 of the longitudinal slide device 2 is connected to this through hole 42. The ends are locked.

5 and 6 show a state in which the locking mechanism 31 is held in a locked state, in other words, the front and rear slide device 2
Pusher plate 51 for returning the locking mechanism 31 to the unlocked state, in other words, the locking mechanism 6 of the longitudinal slide device 2 to the locked state from the state in which the locking mechanism 6 of the slide device 2 is held in the unlocked state.
A pusher plate 51 is attached to be slidable along the slide rail 4 on the vehicle body side. A guide member 52 is attached to the lower end of the vehicle body side slide rail 4 along its longitudinal direction at an appropriate interval. 53 is inserted, and the pusher plate 51 is moved in the front-rear direction of the vehicle body side slide rail 4 by operating the operating knob 55 formed to protrude outward from the sliding portion 53 via the bending portion 54. I can do it.
Note that the pusher plate 51 is held by friction so that it does not move when it comes into contact with the push-up pin 36. A pusher portion 56 having a trapezoidal shape when viewed from the side is formed at a position extending inside the vehicle body side slide rail 4 and below the push-up pin 36 that projects downward from the elongated hole 38 of the base plate 32. . The height from the bottom 56a to the top 56b of the trapezoidal pusher portion 56 is such that the locking pin 37 is engaged with the locking hole 39 of the base plate 32 when the push-up pin 36 is pushed upward. The length is such that it can be released.

The structure of one embodiment of the walk-in device for a vehicle seat according to the present invention has been described above. Next, the operation will be explained with reference to FIG. 1 and FIGS. 7A and 7B.

When the reclining lever 25 of the reclining mechanism 3 is operated to tilt the seat back forward, the device arm 13 is rotated in the direction of the arrow a, and the pin 17 as the sensing mechanism 21 formed on the angle adjustment section 16 of the device arm 13 is rotated. The connecting wire 23 moves in the direction of the arrow b along the arcuate groove 19 formed in the base 12, and the connecting wire 23 connected to the pin 17 is pulled in the direction of the arrow c. By pulling this connecting wire 23, the rotating plate 33 of the locking mechanism 31 is rotated in the direction of arrow d around the pivot pin 34,
The locking pin 37 is guided to the locking hole 39 while being guided by the guide part 40, and at the position where the lower end of the locking pin 37 reaches the locking hole 39, the coil spring 35 fitted in the pivot pin 34 As a result, the rotating plate 33 is pressed downward, and the locking pin 37 and locking hole 39
and maintain the engaged state (see FIG. 7A). At this time, the rotation of the rotation plate 33 in the direction of the arrow d causes the connecting wire 10 to be pulled in the direction of the arrow e against the urging force of the spring 9, causing the lock lever 8 to rotate in the direction of the arrow f. This rotation of the lock lever 8 in the direction of the arrow f brings the lock mechanism 6 into the unlocked state, and the seat cushion side slide rail 5 of the front/rear slide mechanism 2 automatically moves to the frontmost position by the biasing force of a spring (not shown). The seat cushion will then automatically move to the frontmost position.

Next, when the seat bag, that is, the device arm 13 is rotated in the direction opposite to the direction of arrow a from the state in which the locking pin 37 and the locking hole 39 are kept engaged, the sensing mechanism 21 is activated. The pin 17 moves in the direction opposite to the direction of arrow b, and the connecting wire 2
The tensile force in the c direction of 3 no longer works, and the rotating plate 3
A force is generated through the connecting wire 23 connected to the lock lever 3 to cause the lock lever 8 to rotate in the locking direction opposite to the direction of the arrow f in accordance with the biasing force of the spring 9. However, since the locking pin 37 and the locking hole 39 maintain the engaged state, the locking mechanism 3
1 is in the locked state, and the lock mechanism 6 maintains the unlocked state.

From the above state, the seat cushion is moved rearward against the bias of the spring, and the pusher plate 51 is slid into a predetermined position on the guide member 52 provided along the slide rail 4 on the vehicle body side. When the base plate 32 of the locking mechanism 31 is located above, the push-up pin 36 protruding toward the lower surface of the rotating plate 33 of the locking mechanism 31 is gradually pushed upward. reaches the top 56b of the trapezoidal pusher portion 56, the fitted state between the locking pin 37 formed on the rotating plate 33 and the locking hole 39 formed on the base plate 32 is released (the second (See Figure 7B). Therefore, the connecting wire 10 connected to the rotating plate 33 is pulled in the direction opposite to the direction of the arrow e by the urging force of the spring 9, the lock lever 8 is rotated in the direction opposite to the direction of the arrow f, and the locking mechanism 6 is rotated. The seat cushion side slide rail 5 of the front and rear slide device 2 is locked, and the seat cushion is held in the locked state by the locking mechanism 6 at an arbitrarily set position of the pusher plate 51.

The above description merely shows one embodiment of the walk-in device according to the present invention; for example, the configuration of the front-rear slide device 2 is not limited to that shown in the figure, and the pin 17 and wire as the sensing mechanism 21 are not limited to the structure shown in the figure. The locking mechanism 31 may be operated using an appropriate link mechanism in place of the locking mechanism 23, and the locking hole 39 and the locking pin 37 formed in the base plate 32 and the rotating plate 33 of the locking mechanism 31, respectively. The configuration may be reversed, the locking pin 37 is implanted in the base plate 32, and the locking hole 39 is formed in the rotating plate 33. Furthermore, the seat back can be tilted not only forward but also backward. It is also possible to configure the sensing mechanism 21 to operate in order to operate the locking mechanism 31 of the walk-in device even when the walk-in device is tilted at a predetermined angle.

Further, a locking means may be provided to securely hold the pusher plate 51 in the set position when the pusher plate 51 is slid along the longitudinal direction of the front and rear slide device 2.

According to the walk-in device for a vehicle seat according to the present invention, the base plate and the rotating plate constituting the locking mechanism are arranged in a stable state, and the locking pin and the locking hole are engaged with each other. The withdrawal operation can be performed reliably,
The locking mechanism has high operational reliability, and the rotating plate can be pre-assembled to the board so that it can rotate freely, so assembly work can be done quickly, and it can also be adjusted to suit the preferences and physique of the seated person. The position of the pusher plate that activates the push-up pin can be easily and quickly adjusted along the length of the slide rail by operating the operation knob, and the locking mechanism is activated to unlock the locking mechanism. If you want to return the locking mechanism of the front and rear slide device to the locked state without moving the seat cushion to the rear position, operate the operation knob and push up the push-up pin to move the seat cushion. The lock mechanism can be returned to the locked state without having to do so.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing an embodiment of a main part of a walk-in device for a vehicle seat according to the present invention;
Figure 2 is an enlarged perspective view of the sensing mechanism, Figures 3 and 4.
The figures are an exploded perspective view and an assembled state diagram schematically showing an embodiment of the locking mechanism, FIGS. 5 and 6 are a perspective view and a rear perspective view schematically showing an embodiment of the pusher plate, and FIG. FIGS. 7A and 7B are explanatory cross-sectional views showing the operating states of the locking mechanism, respectively, and FIG. 8 is a perspective view of essential parts showing a conventional walk-in device for a vehicle seat. In the figure, 1... walk-in device, 2... front and rear slide device, 3... reclining mechanism, 4...
Vehicle body side slide rail, 5... Seat cushion side slide rail, 6... Lock mechanism, 8... Lock lever, 9... Spring, 10... Connection wire, 12... Base, 13... Device arm, 17... ... Pin, 19 ... Groove, 21 ... Sensing mechanism, 23 ... Connection wire, 31 ... Locking mechanism, 3
2... Board, 33... Rotating plate, 34... Pivot pin, 35... Coil spring, 36... Push-up pin, 37... Locking pin, 38... Elongated hole, 39...
...Lock hole, 51... Pusher plate, 52...
... Guide member, 55 ... Operation knob, 56 ... Pusher part.

Claims (1)

[Claims] 1. A sensing mechanism that detects the forward tilt of the seat back;
In the vehicle seat walk-in device, the vehicle seat walk-in device includes a locking mechanism that is operated based on the operation of the sensing mechanism and that holds the locking mechanism of the longitudinal slide device in an unlocked state. It has a fixed base plate and a rotating plate rotatably supported on the base plate, and a locking pin is provided at one of the mutually opposing positions of the base plate and the rotating plate, and a locking pin is provided at the other position. A locking hole for regulating the rotation of the lock pin is formed, a push-up pin is formed in the rotation plate, and a long hole through which the push-up pin passes is formed in the substrate, and the rotation of the lock pin is controlled. One end of the plate is connected to the sensing mechanism and the other end is connected to the locking mechanism of the front and rear slide device, and a pusher plate that operates the push-up pin is disposed on the vehicle body side, and the pusher plate is connected to the front and rear slide device. is slidably mounted along the length of the slide rail of the device;
The setting position can be moved to an arbitrary position, and the locking pin and the locking hole are engaged based on the operation of the sensing mechanism, so that the locking mechanism of the longitudinal slide device is held in an unlocked state, and the pusher plate At the set position, the push-up pin is pushed up by the pusher plate, the engagement between the lock pin and the lock hole is released, and the lock mechanism of the longitudinal slide device returns to the locked state. Features: Walk-in device for vehicle seats.