JPS6056646B2 - folding swivel seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION For example, when a vehicle traveling in an up direction is reversed to travel in a down direction, the orientation of the seat must be reversed in response to the reversal of travel.

There are two ways to reverse the seat: a method using a reversible seat that changes the way the back light is folded back and forth, and a method using a rotating seat that rotates the seat with the seat as the back light. The present invention relates to a pivot seat.

Conventional pivot seats have the following two drawbacks. The first drawback is that the space required for rotation is large.

The second drawback is that the seat cannot be rotated freely or fixed in conjunction with the conversion operation.

SUMMARY OF THE INVENTION The object of the present invention is to provide a rotary convertible seat that eliminates these conventional drawbacks.

The gist of the present invention is to provide a rotating seat that rotates about its vertical center line on a fixed base, and to pivot the lower part of the back light to the rear upper part of the rotating seat by a back pivot point, and to is pivotally connected to the pivot seat in front of the back pivot point by the seat pivot point, and the front part is supported by the front support of the pivot seat, and the upper pivot point is provided on the back light above the back pivot point. and the lower pivot point provided on the seat at the rear and lower part of the seat pivot point are connected by a link, and the lower part is pivoted to the front part of the fixed base by the front pivot point, and the front pivot is attached by the bias of the front spring. There is a front stopper piece whose rotation tendency to the left around the point is suppressed by a front running pin. It is equipped with a rear stopper piece whose tendency to rotate to the left is restrained by a rear stop pin, and is located below the seat in the front-rear direction, and its middle part is pivotally connected to the upper part of the rotating seat by a central attachment point. The lever is provided with a lever whose front end is engaged with the left side surface of the front stopper piece, and a recess is provided on the upper surface of the rear part of the lever, and an oblique part that slopes backward and downward is provided behind the recess, so that the seat can be rotated downward. The front stopper piece and the rear stopper piece have a gentle slope downward to the right from the upper end so that the rear lower part presses the slope and then engages with the recess to release the engagement with the front stopper piece at the front end. establish. The present invention will be described in detail below with reference to drawings of embodiments of the present invention.

To explain the correspondence between the symbols on the drawing and the names of their parts, 1 is the fixed base, 2 is the rotating seat, 3 is the back rest, 4 is the back pivot point, 5 is the seat rest, and 6 is the seat pivot point. point, 7 is the upper pivot point, 8 is the lower pivot point, 9 is the link, 10 is the front pivot point, 11 is the front spring, 12
is the front stop pin, 13 is the front stopper piece, 14 is the rear pivot point, 1
5 is a rear spring, 16 is a rear stop pin, 17 is a rear stopper piece, 1
8 is the center landing point, 19 is the front end of the lever 22, 20 is the recess,
21 is the rear lower end of the seat 5, 23 and 24 are slopes, 26 is a slope, and 29 is a support.

A rotating seat 2 that can be rotated about its vertical center line is provided on a fixed base 1.

Although the structure for rotation is appropriate, in the figure, the lower part of the rotating seat 2 forms a cylinder 30 and is rotatably inserted into the fixed seat 1. Place the lower part of the back support 3 at the rear upper part of the rotating seat 2, and attach the back pivot point 4
It is pivoted by.

The rear part of the seat 5 is pivotally connected to the pivot seat 2 in front of the back pivot point 4 through the seat pivot point 6, and the front part is connected to the pivot seat 2. The seat 5 is supported by a support 29 at the front of the seat 2 and kept substantially horizontal.

an upper pivot point 7 provided on the back support 3 above the back pivot point 4;
A lower pivot point 8 provided on the seat rest 5 at the lower rear of the seat pivot point 6 is connected with a link 9.

The back support 3 is in a posture leaning backwards. The lower part of the fixed base 1 is pivotally attached to the front part of the fixed base 1 by a front pivot point 10, and the tendency of rotation to the left around the front pivot point 10 due to the bias of a front spring 11 is suppressed by a front stop pin 12. A stopper piece 13 is provided.

The lower part is pivotally connected to the rear of the fixed base 1 by a rear pivot point 14,
A rear stopper piece 17 is provided which prevents a leftward rotational tendency around the rear pivot point 14 due to the bias of the rear spring 15 by a rear stop pin 16. A lever 22 is provided below the seat 5 in the front-rear direction, the middle part of the lever 22 is pivotally connected to the upper part of the rotating seat 2 by a center attachment point 18, and the front end 19 is engaged with the left side surface of the front stopper piece 13. A recess 20 is formed on the upper surface of the rear part of the lever 22.
At the same time, an oblique portion 26 that slopes rearward and downward is provided at the rear of the recessed portion 20. The rear lower part 21 of the seat 5, which is rotated downward, presses the oblique part 26 and then engages with the recess 20, thereby releasing the engagement of the front end 19 with the front stopper piece 13. Front stopper piece 13 and rear stopper piece 1
On the right side of 7, there are provided slopes 23 and 24 which are gentle downward to the right from the upper end. 25 is a spring that biases the lever 22 forward.

The shapes of the recessed portion 20 and the oblique portion 26 are appropriate to match their functions.

Reference numeral 27 denotes a front restricting piece provided on the fixed base 1 at a position on the left side of the front end 19, and 28 represents a rear restricting piece provided on the fixed base 1 immediately behind the front restricting piece 27.

Note that the rear stop pin 16, rear stopper piece 17, etc. are the front stop pin 1.
2. It is located immediately after the front stopper piece 13, etc.

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

FIG. 1 shows the state in which it is used as a seat, that is, the unfolded state. In this state, the front end 19 is engaged with the front stopper piece 13, and there is a front limiter piece 27 on the left side so that it cannot rotate. The seat 2 does not rotate and is normally used as a seat.

If, in this state, you accidentally try to turn it in the right direction as seen in FIG.
1, the seat is disengaged from the front end 19, and the seat can be rotated without damaging the lever 22 or the like. Since the seat rest 5 is supported by the lower pivot point 6 and the column 29, it can withstand the load.

The back support 3 can withstand the load because the upper pivot point 7 is connected to the lower pivot point 8 by a link 9 and is pivoted by the back pivot point 4.

In other words, it can stably function as a seat in the unfolded state.

To rotate the invention, proceed as follows.

When the seat rest 5 is rotated upward around the seat pivot point 6, the lower pivot point 8 pulls the upper pivot point 7 through the link 9, and the back rest 3 is rotated forward around the back pivot point 4. The user moves to stand with the seat rest 5 and back rest 3 in close contact with each other as shown in Fig. 3.

In this state, the seat rest 5 tends to fall backwards due to gravity, and the back rest 3 tends to fall forward due to gravity, and since there is friction between the seat rest 5 and the back rest 3, this Although it can be made almost stable when standing, an appropriate holding mechanism, recess 20, etc. may be added. While the seat rest 5 is rotating upward, the rear lower end 21 of the seat rest 5 presses down the rear upper surface of the lever 22, and the front end 19 moves upward and releases its engagement with the front stopper piece 13. be in a state of being

Hold the seat rest 5 or the back rest 3 in an upright position and turn it together with the rotating seat 2 counterclockwise when viewed from above, and return the seat rest 5 to the horizontal position at the position where the front end 19 touches the rear restriction piece 28. The backrest 3 is properly folded down by the action of the link 9, and the lower rear end 21 no longer presses the lever 22, so the front end 19 engages with the rear stopper piece 17, making it difficult to rotate the seat.
It is now in use as a seat, meaning that the seat can now be changed. Since the seat rest 5 and the back rest 3 are standing during the conversion process, they do not protrude around the rotation, and the space for rotation is small, making it easier to rotate.

The oblique portion 26 serves to make it easier for the lower rear end 21 to press down on the lever 22.

When the front end 19 is rotated counterclockwise without being folded, the front end 19 is guided by the slope 24, moves upward, and is engaged with the rear stopper piece 17.

When the front end 19 is rotated clockwise without being folded, the front end 19 is guided by the slope 23, moves upward, and is engaged with the front stopper piece 13.

If the front end 19 is engaged with the rear stopper piece 17 and the rotary seat 2 is attempted to be rotated clockwise with the seat rest 5 etc. deployed, the front end 19 will push the rear stopper piece 17 and rotate. Can be done.

When the front end 19 is to be changed from the deployed state engaged with the rear stopper piece 17, the seat rest 5 is raised to stand together with the back rest 3 as before, the front end 19 is released from the engagement, and rotated.
Can be converted.

Lift back support 3 from the unfolded state and use link 9 to position seat 5
It is also possible to raise the seat 5 by pushing the rear lower end 21 of the seat 5 and put it in the folded state. The seat support 5 and the back support 3 may include frames and the like necessary for constructing them.

Although FIG. 2 is a front view, left and right in this description are based on FIG. 2.

According to the present invention, the first drawback of the conventional method can be eliminated by reducing the space required for the seat, and by folding the seatrest upward, the seat, which was previously in a fixed state, can be removed. The second drawback of the conventional method was overcome by making it rotatable and by extending the folded seat downwards, the seat, which was previously rotatable, became fixed. It is something that can be removed.

As described above, the present invention provides a rotary convertible seat that eliminates the conventional drawbacks, and is of great industrial value.

[Brief explanation of drawings]

1 is a right side view, FIG. 2 is a front view, FIG. 3 is a right side view in a folded state, and FIG. 4 is a rear view.

Claims (1)

[Claims] 1. A rotating seat that rotates about its vertical centerline is provided on the fixed base, and the lower part of the backrest is pivotally connected to the rear upper part of the rotating seat by the back pivot point, and the rear of the seatrest is attached to the back. The seat pivot point is pivotally connected to the pivot point in front of the pivot point, and the front part is supported by the front support of the pivot seat, and the upper pivot point is provided on the back rest above the back pivot point. and a lower pivot point provided on the seat at the rear and lower part of the seat pivot point are connected by a link, and a front stopper piece whose lower part is pivoted by the front pivot point is provided at the front of the fixed base, and the front A front stop pin that contacts one side of the stopper piece is provided at the front of the fixing base, a front spring is provided to move the front stopper piece to one side, and the lower part is attached to the rear of the fixing base by a rear pivot point. A rear stopper piece is pivotally mounted, a rear stopper pin that contacts one side of the rear stopper piece is provided at the rear of the fixing base, a rear spring is provided to move the rear stopper piece to one side, and the seat abutment A lever is provided in the lower part in the front-rear direction, the middle part is pivotally connected to the upper part of the rotating seat by a central attachment point, and the front end is engaged with one side surface of the front stopper piece, and the lever is attached to the upper surface of the rear part of the lever. A concave portion is provided, and a diagonal portion that slopes rearward and downward is provided behind the concave portion, and the front end of the lever is positioned so that it disengages from the front stopper piece when the concave portion is pushed down, and the lever is placed at the lower part behind the lowered seat rest. 1. A folding and rotating convertible seat, characterized in that the inclined part and the recessed part are positioned so as to be pushed down, and the other side of the front stopper piece and the rear stopper piece is provided with a slope downward from the upper end to the other side.