JPH0121865Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a locking mechanism for a forward-folding seat.

Conventionally, a forward-folding seat has been constructed by installing a lower frame 3 on legs 1 and 2 as shown in FIG.
In a configuration in which a seat 5 consisting of a seat portion 5A and a backrest portion 5B is installed, the lower frame 3 is pivoted under the floor via the front leg portion 1, and is placed on the seat portion 5A as shown in FIG. The backrest portion 5B is folded, and the seat 5 thus folded is rotated in the direction of arrow A to cause it to fall forward immediately behind the front seat 6 as shown in FIG. A space S is created at the position. However, if the seat 5 is slid forward and folded forward as shown in FIG. 4, the front seat 6
Alternatively, the seat 5 may collide with the vehicle body, causing mutual damage.

The object of the present invention is to improve the above-mentioned conventional drawbacks and to prevent the seat from falling forward when it is sliding forward.

Therefore, the locking mechanism of the forward-folding seat of the present invention includes a lower frame whose front part is pivoted to the floor, an upper frame which is slidably attached to the lower frame, and a seat installed on the upper frame. A locking piece is rotatably attached to the side of the lower frame, and a locking tool that engages with the locking piece is installed on the floor side, and the locking piece can be attached directly or directly to the lower frame. It is rotatably attached to the side surface and indirectly rotated in a direction to release the engagement with the locking tool through a rotating piece that comes into contact with the locking piece, and the locking piece is mounted on the side surface of the lower frame. The locking rod that locks the locking piece from rotating in the direction of disengaging the locking piece or the rotating piece in the direction of disengaging the locking piece from the locking tool is rotatable. The head of the locking rod contacts the upper frame moving backward at a predetermined position, and the locking rod is rotated by the backward movement of the upper frame and separated from the locking piece or the rotating piece. When the seat slides forward, the engagement between the locking piece and the locking tool can be released directly or indirectly through the rotating piece. Even if an attempt is made to rotate the locking piece in the direction of disengaging the locking piece from the locking tool, or in the direction of disengaging the locking piece from the locking tool, it will not rotate. Thus, the locking piece remains engaged with the locking device, so the seat is prevented from falling forward, and when the seat slides backward from the predetermined position, the upper frame moves backward. The locking rod is pushed and rotated and released from the locking piece or rotating piece, and only then does the locking piece disengage from the locking tool directly or indirectly via the rotating piece. This allows the seat to be tilted forward. Therefore, the seat can be tilted forward only when it is at a predetermined position where it will not collide with the front seat or the vehicle body, or when it is behind the predetermined position, thereby reliably preventing damage to the seat.

The present invention will be explained in detail based on the embodiments shown in FIG. 6 and below.

The sheet of the present invention is similar to the conventional example above.
A lower frame 3 is installed on the legs 1 and 2 as shown in the figure, and an upper frame 4 is slidably attached to the lower frame 3,
In a configuration in which a seat 5 consisting of a seat portion 5A and a backrest portion 5B is installed on the upper frame 4, the lower frame 3
is pivoted under the floor via the front legs 1, the backrest 5B is folded onto the seat 5A as shown in FIG. 2, and the seat 5 in the folded state is rotated in the direction of arrow A. As shown in FIG.
As shown in the figure, attach the bracket 1 to the rear leg 2 side.
1 is attached to the bracket 11, and the root end of a substantially fan-shaped locking piece 12 having a protrusion 12A formed at the upper end is rotatably attached to the bracket 11. It is biased in the direction of arrow C.
Reference numeral 14 denotes a rotating piece, the root end of which is rotatably attached to the bracket 11, the tip of the rotating piece 14 abuts against the protruding body 12A of the locking piece 12, and the handle is further attached to the bracket 11 from the root end. 14A will be extended. The locking piece 12 is attached to the floor F.
The tip of a hook-shaped locking rod 16 rotatably attached to the bracket 11 is engaged with the locking tool 15 extended from the bracket 11 in the normal state, while the tip of the hook-shaped locking rod 16 rotatably attached to the bracket 11 is in the locking groove 14B of the rotating piece 14. Engaged in normal state. Then, the head 16A of the locking rod 16 is attached to the upper frame 4 at a predetermined position.
The locking rod 16 protrudes into the path of the spring 17.
is biased in the direction of arrow B.

In the above configuration, when the seat 5 slides rearward (in the direction of arrow G) and the upper frame 4 reaches a predetermined position, it abuts against the head 16A of the locking rod 16 and moves further backward, as shown in FIG. The locking rod 16 is connected to the spring 17
The tip of the locking rod 16 is thus separated from the locking groove 14B of the rotating piece 14, and the rotating piece 14 pulls up the handle 14A in the direction of the arrow H. Thus, the locking piece 12 is rotated in the direction of the arrow through the rotation piece 14 against the elasticity of the spring 13, and is engaged as shown in FIG. The engagement between the stopper piece 12 and the stopper 15 is released, and as a result, the seat 5 can be tilted forward as shown in FIG. The ability to tilt forward in this manner is limited to when the upper frame 4 slides rearward beyond the position P where it abuts the head 16A of the locking rod 16, as shown in FIG.

Next, when returning the seat 5 from the forward tilted state to the normal position, the locking piece 12 contacts the locking tool 15 and once rotates in the direction of the arrow, then passes the locking tool 15 and is activated by the elasticity of the spring 13. and rotate in the opposite direction to the arrow.
The locking piece 12 and the locking tool 15 are again in the engaged state shown in FIG. 7, and when the seat 5 further slides forward from the position P, the locking rod 16 is separated from the upper frame 4, Due to the elasticity of the spring 17, the tip rotates in the direction opposite to the arrow mark, and the tip of the rotating piece 14 is reattached to the locking groove 14B.
The locking rod 16 and the rotating piece 14 are again in the engaged state shown in FIG. 6.

The present invention is not limited to the above embodiments, and for example, the locking piece does not have to be of a two-stage type that is rotated via a rotating piece, and the handle may be extended directly from the locking piece. good. In this case, for example, a locking groove into which the tip of the locking rod is inserted is formed at a predetermined location of the engagement piece or handle. Furthermore, the locking tool for locking the locking piece may be a locking groove or a locking hook instead of the above-mentioned locking tool, and in this case, the locking piece may have a locking hook, a locking groove, etc. Of course, it is possible to form a

[Brief explanation of the drawing]

Figures 1 to 5 are explanatory diagrams of the operation of a conventional forward-folding seat, with Figure 1 in the normal state, Figure 2 in the folded state, Figure 3 in the forward-folding state, and Figure 4 in the forward-sliding state. Fig. 5 shows the forward tilted state from the state shown in Fig. 4, Fig. 6 and the following show an embodiment of the present invention, Fig. 6 is a side view of the normal state, and Fig. 7 is a side view of the seat. A side view of the state in which the has slid backward from the predetermined position,
FIG. 8 is a side view of the locking piece and the locking tool in an open state. In the figure, F...Floor, 3...Lower frame, 4...Upper frame, 5...Seat, 11...Bracket, 12...
... Locking piece, 14 ... Rotating piece, 15 ... Locking tool, 1
6...Latching rod.

Claims (1)

[Scope of utility model registration request] In a forward-folding seat consisting of a lower frame whose front is pivoted to the floor, an upper frame slidably attached to the lower frame, and a seat installed on the upper frame, there is a seat on the side of the lower frame. A locking piece is rotatably attached, a locking tool that engages with the locking piece is installed on the floor side, and the locking piece is rotatably attached directly or to the side of the lower frame. It is indirectly rotated in a direction to release the engagement with the locking tool through the rotating piece that comes into contact with the lower frame, and the locking piece on the side surface of the lower frame releases the engagement with the locking tool. A locking rod is rotatably provided to prevent the rotation piece from rotating in the direction of releasing the engagement between the locking piece and the locking tool, and the head of the locking rod is set at a predetermined position. The locking rod comes into contact with the upper frame moving backward, and is further rotated by the backward movement of the upper frame and separates from the locking piece or rotating piece, thereby engaging the locking piece with the locking tool. A locking mechanism for a forward-folding seat, characterized in that the locking mechanism can be released directly or indirectly through a rotating piece.