JPS635944Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reclining seat with a walk-in mechanism used in automobiles and the like. Generally, in automobiles that do not have rear doors, such as two-door cars and three-door cars, a walk-in mechanism is often attached to the front seat equipped with a reclining mechanism in order to improve the ease of getting in and out of the rear seat. This walk-in mechanism is
As shown in Figure 1, when the seat back is folded forward (arrow A), the entire seat moves forward in the direction of arrow B. From the viewpoint of operability, etc., it is better to have a configuration in which the seat track cannot be locked in the position it takes at the moment (therefore, it includes not only the front position but also the intermediate position taken when the seat is activated for walk-in). is good. However, with this configuration, when the rear seat occupant attempts to return the seat after getting on and off the seat, a situation may occur in which the seat track is not locked even though the seat back is raised and locked. If a passenger sits on the front seat in such a state, an extremely dangerous situation will occur when the vehicle suddenly starts or stops.

The present invention has been made in view of the above points, and its purpose is to avoid the above-mentioned dangerous situations.

The present invention will be explained in detail below with reference to the drawings. The reclining seat according to the present invention is characterized by its return operation.As shown in FIG. ), the seat back 1 does not rise beyond a predetermined angle, and when you try to raise it further, the seat back 1 and the seat cushion 2 move backward (arrow D), and when the seat back 1 moves to a position where the seat track can be locked, the seat back When the truck is locked, the seat bag 1 is also released and locked (arrow E). FIG. 3 is a side view showing one embodiment of the reclining seat of the present invention for specifically carrying out the above operation.
5 and 5 are side views showing other operating states (in both figures, components of the reclining mechanism and seat track are not shown unless necessary for explaining the present invention).
In these figures, 3 is an attachment bracket that is attached to the seat cushion 1 side with screws, etc., 4 is a ratchet that is integrally fixed to the attachment bracket 3 with rivets, etc., and 5 is attached to the seat cushion 2 side with screws, etc. This is the lower bracket. A main shaft 6 is protruded from the lower bracket 5, and the upper bracket 3 and the ratchet 4 are pivotally connected to the lower bracket 5 by the main shaft 6. A ball 7 is pivotally mounted to the lower bracket 5 for locking the upper bracket 3 at a desired angle. This ball 7 has internal teeth 7a for meshing with the external teeth 4a of the ratchet 4.
is engraved. Note that the pole 7 forms one part of the reclining mechanism. A lock arm 8 is pivotally connected to the lower bracket 5 by a shaft 9, and a locking claw 8a for engaging with the locking portion 4b of the ratchet 4 is formed at one end.
A pin 8b is implanted at the other end. A spring 10 is stretched between the lock arm 8 and the side wall of the lower bracket 5.
is the locking pawl 8a of the lock arm 8 and the ratchet 4.
The lock arm 8 is constantly urged to disengage from the locking portion 4b, that is, in the direction of releasing the lock. Reference numeral 11 denotes an upper rail of the seat track, which is guided by a lower rail 12 fixed to the floor. Further, a release arm 13 is rotatably attached to the side surface of the upper rail 11.
One end of the release arm 13 is provided with a long groove 13a into which the pin 8b of the lock arm 8 engages. 14 is a memory plate. The end 14b of the memory plate 14 and the release arm 1
3 relative to the mounting shaft 15, the lower end 13b of the release arm 13 and the memory plate 1 are in a position where the seat track 11 cannot be locked.
The upper surface 14a of the side protrusion of No. 4 is selected so as to be in contact with the upper surface 14a of the side protrusion. In addition, in order to receive most of the rotational force of the seat back 1 through the shaft 9 and to reduce the contact resistance between the lower end 13b of the release arm 13 and the upper surface 14b of the memory plate 14, the locking portion 4b of the ratchet 4 locks into the lock arm 8. It is preferable that the shaft 9, which is the center of rotation of the lock arm 8, is located substantially on the line of action of the force exerted on the locking pawl 8a.

Next, to explain the operation at the time of return of this embodiment, first, when the seat bag 1 is in the state shown in FIG. 2, as shown in FIG. are disengaged, and the lower end 13b of the release arm 13 is in contact with the upper surface 14a of the memory plate 14. Therefore, the locking pawl 8a of the lock arm 8 is in a state of being tilted toward the ratchet 4 side. Therefore, when the seat bag 1 is raised, the upper bracket 3 and the ratchet 4 initially rotate. However, when it is rotated by a predetermined angle, the locking portion 4b of the ratchet 4 and the locking pawl 8a of the lock arm 8 engage with each other, as shown in FIG. 4, and the rotation is stopped. This is the situation shown in FIG. In this state, if force is applied to seat back 1 in an attempt to raise seat back 1 further, seat back 1 and seat cushion 2 will move rearward and escape from the position where seat track 11 cannot be locked (state shown in Figure 2). ).
Therefore, at the same time as the seat track 11 is locked, the lower end 13b of the release arm 13 is locked.
The contact between the memory plate 14 and the upper surface 14a of the memory plate 14 is released, the lock arm 8 is rotated counterclockwise by the spring 10, and the locking claw 8 of the lock arm 8 is rotated counterclockwise.
a is disengaged from the locking portion 4b of the ratchet 4. Therefore, seatback 1 occurs further and the fifth
As shown in the figure, the seat bag 1 is locked when the internal teeth 7a of the ball 7 mesh with the external teeth 4a of the ratchet 4. This is the situation shown in FIG. In this state, the release arm 13 is also released and the reclining mechanism can be operated. If the seat bag is moved forward from the state shown in FIG. 5 and the seat is walked in, the state returns to the state shown in FIG. 3, as a matter of course.

In the above description, the ratchet 4 is provided with the locking portion 4b, but the same effect can be obtained even if the upper bracket 3 is provided with a locking portion. Furthermore, it goes without saying that the attachment bracket 3 and the ratchet 4 may be formed integrally and a locking portion may be provided thereon.

As explained above, the present invention is constructed so that the seat back cannot be locked at a position where the seat track cannot be locked. Therefore, locking the seat track has priority over locking the seat bag in terms of time, so the dangerous situation described above can be avoided. Furthermore, the structure of the present invention is compact because it essentially only adds a lock arm, a release arm, and a spring to a conventional reclining seat.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of walk-in, Fig. 2 is an explanatory diagram of the operation when the reclining seat of the present invention returns,
FIG. 3 is a side view showing the configuration of one embodiment of the reclining seat of the present invention, and FIGS. 4 and 5 are side views showing other operating states. DESCRIPTION OF SYMBOLS 1... Seat back, 2... Seat cushion, 3... Attachment bracket, 4... Ratchet, 4a... External tooth, 4b... Locking part, 5... Lower bracket, 6... Main shaft, 7... ...Ball, 8...
Lock arm, 8a...locking claw, 8b...pin,
9...Axis, 10...Spring, 11...Upper rail, 12...Lower rail, 13...Release arm, 13a...Long groove, 13b...Lower end, 14
...Memory plate, 14a...Top surface.

Claims (1)

[Claims for Utility Model Registration] (1) A locking portion is provided on a part of the attenuation bracket or a ratchet that rotates integrally with the racket, and a locking pawl for engaging with the locking portion is provided. A lock arm formed at one end is rotatably connected to the lower bracket, and the lock arm is always biased in the unlocking direction by a spring.
A release arm is provided such that one end of the release arm contacts the memory plate in a position where the seat track cannot be locked, and the contact is released when the seat track is released from the position where the seat track cannot be locked. A reclining seat with a walk-in mechanism, characterized in that one end of the seat is configured to engage with the other end of the lock arm. (2) Utility model registration claim 1, characterized in that the center of rotation of the lock arm is located approximately on the line of action of the force exerted by the locking portion of the ratchet on the locking pawl of the lock arm. Reclining seat with walk-in mechanism.