JPS6328028Y2 - - Google Patents

Description

[Detailed description of the invention] In a conventional widened seat that has a rocking arm that is provided to provide a table on the back of the backrest, etc. and swings between the stowed state and the unfolded state, it is difficult to use the table in the unfolded state. If you perform a widening or narrowing operation on
There was a drawback that the cups on the table would fall over. The purpose of the present invention is to eliminate these conventional drawbacks, and to provide a movable frame that can move between a contracted width state and an expanded width state by sliding on a fixed frame fixed to a floor surface, etc. A movable frame in a widened seat having a rocking arm that is pivotally connected to the lower part of a backrest etc. by a back pivot point and can slide between a stowed state close to the backrest etc. and an expanded state far away. A locking pawl is pivotally attached at the frame pivot point and can slide between an engaged position and a disengaged position, and the rocking arm and the locking pawl are connected to each other so that the locking pawl is released when the rocking arm is in the retracted state. between the engaging position of the engaging pawl when the moving frame is in the contracted width state and the disengaging position of the engaging pawl when the moving frame is widened. It consists of a fixed frame with a stopper that does not move.

The configuration of the present invention will be explained below with reference to drawings of embodiments of the present invention.

First, we will explain the correspondence between the symbols in the figure and the names of their parts. 1 is the floor surface, etc., 2 is the fixed frame, 3 is the movable frame, 4 is the back rest, etc., 5 is the back pivot point, 7 is the rocking arm, 8 is a frame pivot point, 9 is a hook, 10 is a connecting body, and 11 is a stopper.

A back pivot point 5 is attached to the lower part of a back support 4 provided on a movable frame 3 that can slide on a fixed frame 2 fixed to a floor surface 1 and move between a contracted width state and an expanded width state. The present invention is realized in a widened seat support having a rocking arm 7 which is pivotally mounted and can swing between a retracted state close to the back rest 4 and a deployed state far away.

The movable frame 3 is provided with a locking pawl 9 which is pivotally connected at a frame pivot point 8 and can swing between an engaged position and a disengaged position. In FIG. 3, if the locking pawl 9 moves forward, it will be in the locking position, and if it moves backward, it will be in the disengaging position. FIG. 3 shows the engaged position, and FIG. 4 shows the disengaged position.

It is connected between the rocking arm 7 and the locking pawl 9, and when the rocking arm 7 is in the retracted state, the locking pawl 9 is in the disengaged state, and the rocking arm 7 is
A connecting body 10 is provided such that the locking pawl 9 is in the locking position when the locking member is in the unfolded state. In the figure, the lower end of the rocking arm 7 and the locking claw 9
The lower end of the connector 10 is connected to the lower end of the connector 10 by a connector 10. In the figure, the rocking arm 7 and the connecting body 10 are connected by a rear pin 6, and the locking claw 9 and the connecting body 10 are connected by a front pin 12. The position of the locking pawl 9 is shown in the figure, but it can also be positioned at the rear, in which case the connecting body 10 is not rod-shaped as shown in the figure. It is also possible that it is a pin-shaped member that directly connects the rocking arm 7 and the locking claw 9.

It is located between the engaging position of the engaging pawl 9 when the moving frame 3 is in the reduced width state and the engaging position of the engaging pawl 9 when the moving frame 3 is in the expanded width state; A stopper 11 is provided on the fixed frame 2 so as to occupy a position that is not between the disengaged position of the movable frame 3 and the disengaged position of the locking pawl 9 in the widened state of the movable frame 3. Although the figure shows a case in which the stopper 11 is provided at the front of the seat, it may also be provided at another location.

The widening mechanism may be any suitable known one, but
In the figure, notches 13 and 14 are provided on the side of the fixed frame 2, and are pivoted on the side of the movable frame 3 by a pivot point 15, and are removably engaged with the notch 13 or 14. It is equipped with an engaging/disengaging pawl 16. The engaging/disengaging claw 16 is engaged/disengaged by a handle 17 provided on the engaging/disengaging claw 16. When the engaging/disengaging pawl 16 engages with the notch 13, the width is reduced, and when the engaging/disengaging pawl 16 engages with the notch 14, the width is expanded.

Since the present invention has such a configuration, its functions and effects are as follows.

Since the stopper 11 is located between the engaging position of the engaging pawl 9 in the contracted width state and the engaging position of the engaging pawl 9 in the expanded width state, when the engaging pawl 9 is in the engaging position, that is, the rocking arm 7 is expanded. In this state, the movement of the locking pawl 9 is obstructed by the stopper 11, so that the movable frame 3 cannot be widened or shortened.

Since the rocking arm 7 is in an expanded state when the table 18 is used, the movable frame 3 cannot be moved when the table 18 is used. Therefore, the conventional drawbacks can be eliminated.

Since the stopper 11 is not located between the disengaged position of the locking pawl 9 in the reduced width state and the disengaged position of the locking pawl 9 in the expanded width state, when the locking pawl 9 is in the disengaged position, that is, the rocking arm 7 is When in the stored state, the movement of the locking claws 9 is not obstructed by the stopper 11, so the movable frame 3 can be moved and the width can be widened or shortened. In the intermediate state between the contracted width state and the widened state, the swing arm 7 is naturally in the retracted state, so if the table 18
If the table 18 is configured to be in the stowed state in conjunction with the swing arm 7, the table 18 cannot be expanded in the intermediate state, but if the table 18 is configured to be expanded independently of the rocking arm 7, the table 18 cannot be expanded in the intermediate state. That is, even when the rocking arm 7 is in the retracted state, if an attempt is made to forcibly unfold the table 18, the table 18 will not fail to unfold. However, if the table 18 is unfolded with the rocking arm 7 in the retracted state, the table 18 will normally be tilted from the horizontal, so such a usage is almost never practical. Since the related structure between the rocking arm 7 and the table 18 is well known, the explanation thereof will be omitted. When trying to extend the widened state and the reduced width state over a wide range, use a narrow stopper 11.
It is sufficient to arrange an appropriate number of them at intervals that allow the locking claws 9 to fall. If the table 18 and the rocking arm 7 are configured to interlock, the seat cannot be moved when the table 18 is in the unfolded state, but can only be moved when the table 18 is in the retracted state.

In this way, the present invention eliminates the drawbacks of the conventional seat and provides a widened seat that can be widened or shortened when the table is not in use, but cannot be widened or shortened when the table is in use. , has great practical value.

In the contracted width state of FIG. 2, the locking claw 9 is shown in the engaged position above the stopper 11, but in the widened state and in the engaged position, the locking claw 9 is shown positioned below the stopper 11. It turns out.

[Brief explanation of the drawing]

Fig. 1 is a front view in the reduced width state, Fig. 2 is a cutaway top view in the reduced width state, Fig. 3 is a side view in the expanded width state, and Fig. 4 is the reduced width state or widened state in the stored state. It is a side view of the state in between them. In the figure, 1 is a floor surface, etc., 2 is a fixed frame, 3 is a movable frame, 4 is a back rest, etc., 5 is a back pivot point, 7 is a rocking arm, 8 is a frame pivot point, 9 is a locking claw, 10 is a connector, and 11 is a stopper.

Claims (1)

[Scope of utility model registration request] A back pivot point 5 is attached to the lower part of a back support 4 provided on a movable frame 3 that can slide on a fixed frame 2 fixed to a floor surface 1 and move between a contracted width state and an expanded width state. In a widened seat having a rocking arm 7 which is pivotably mounted and can swing between a stowed state close to the back rest 4 and a deployed state far away, the swing arm 7 is pivoted to the movable frame 3 at a frame pivot point 8 and is set to an engaged position. A locking claw 9 is provided which can swing between a disengaged position and the locking claw 9, and the rocking arm 7 and the locking claw 9 are connected to each other when the rocking arm 7 and the table 18 provided at the tip thereof are in the retracted state. A connecting body 10 is provided such that the hook 9 is in the engaged position when the hook 9 is in the disengaged position and the rocking arm 7 and the table 18 provided at the tip thereof are in the unfolded state. The movable frame 3 is located between the engaged position of the movable frame 9 and the engaged position of the movable claw 9 in the widened state of the movable frame 3.
A widening seat having an interlocking stopper in which a stopper 11 is provided on a fixed frame 2 and is not located between the disengaged position of the engaging claw 9 in the width-reduced state of the movable frame 3 and the disengaged position of the engaged claw 9 in the widened state of the movable frame 3.