JP2879108B2 - Automatic return device for backrest in reclining seat - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement in a reclining seat mainly used in a theater, a movie theater, a vehicle, and the like.

[Conventional technology]

Conventionally, with this type of reclining seat, in order to automatically form an emergency escape passage, the backrest can be automatically returned in conjunction with the return operation of the seat portion. There is a reclining seat disclosed in JP-A-58-177608.

This reclining seat is composed of a seat cushion, a backstrip, an armrest, and a base supporting these. And
The seat cushion is urged to rotate to a position where it is always upright, and the backrest moves the button on the front side of the armrest up and down to incline the reclining lever connected to the button, and a locking mechanism via the unlocking member at the rear end. Is operated to control the turning operation. Further, a swinging lever that rotates in the same direction as the seating bed is pivoted is provided on a side portion of the seat cushion, and an interlocking rod is provided between a descending side of the swing lever and the reclining lever. I have.

In such a reclining seat, when the sitting person stands and the seated back returns from the horizontal posture to the standing posture, the interlocking rod moves upward, the unlocking member is released via the reclining lever, and the lock mechanism is operated. The backslider is returned to the upright posture simultaneously with the upright posture of the seat.

[Problems to be solved by the invention]

However, in the reclining seat, when the backstrip is in the upright posture together with the seat cushion, the unlocking member is also released, so that the backstrip freely rotates only by touching with a hand and is extremely unstable. In the event of an emergency, there is a danger of leaning against the backstrip and falling with the backstrip.

Also, since the seat cushion is urged to rotate to the position where it is always standing, when the person sitting is trying to get up, the seat cushion will also stand up together, and it will be very stuck to the feet and buttocks. There is a problem that it is difficult for a small child to fall down due to being pushed by the seat cushion.

Therefore, the present invention has been made to solve the above problems, and provides an automatic return device for a backrest in a reclining seat that can be used extremely safely even in an emergency, even in normal use. It is the purpose.

[Means for solving the problem]

In order to achieve this object, an automatic return device for a backrest in a reclining seat according to the present invention includes a backrest pivotally pivotally attached to a fixed portion integral with a pillar, a sitting horizontal posture, and a standing posture when not in use. A seat that is pivotally attached to the fixed part so as to be able to rotate to a posture, and is urged to always rotate to a standing posture; and both ends of a part of the backrest and a part of the fixed part. The gas spring controls the tilting posture of the backrest by changing the axial length of each part, and the gas spring rotates in conjunction with the rotation of the seat, and pushes the gas spring only during the rotation. A cam member having a contour for pressing and opening the valve, a lever capable of pressing and opening the push valve of the gas spring to tilt the backrest irrespective of the horizontal / standing posture of the seat, It is fixed integrally to the body, It becomes the rotation of the attitude from its middle linkage member for temporarily stopping.

[Action]

When the occupant leaves the seat, the seat portion in the horizontal posture returns to the standing posture by itself. When the cam member rotates in conjunction with this operation, the push valve is pressed and opened by the action of the peripheral surface. Then, the gas spring is in a free state and the shaft length is extended. This causes the backrest to rise and return.
The cam member stops rotating after the backrest has finished standing, and closes the push valve.

When the backrest is standing up and returning, the gas spring remains extended, and the backrest is fixed, so that the backrest is usually tilted while sitting on the seat by pulling the lever. . Therefore, even in the event of an emergency, even if the user leans on the vehicle, it does not rotate and is safe. Further, since the seat is temporarily stopped during the turning operation of the seat to the standing posture, the seat is separated from the feet and buttocks of a person who stands up, and it is very easy to stand up and it is safe. This also prevents the danger of a smaller child being pushed by the seat and falling.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

A horizontal pipe 2 is fixed to an upper end of a pillar 1 fixed to a floor surface, and an armrest base plate 3 forming an armrest at both ends of the horizontal pipe 2.
The fixing portion 4 is formed by fixing the R and 3L. The backrest 5 is pivotally attached to the armrest substrates 3R and 3L of the fixing portion 4 by a shaft 6 so as to be tiltable. A hanging piece 7 extending below the shaft 6 is provided on a side portion of the backrest 5 opposite to the left armrest substrate 3L.
And the end of a gas spring 8 is pivotally attached to the hanging piece 7. The other part of this gas spring 8 is an armrest board 3L
The backrest 5 is tilted as shown by the solid line in FIG. 4 by shortening the axial length of the gas spring 8. A push valve 9 protrudes from the front end of the gas spring 8. The push valve 9 opens at a tilt position (a chain line in FIG. 4) of a swingable operating piece 10 provided corresponding to the push valve 9, and The spring 8 is in a free state. The operating piece 10 has a push-pull wire 11 at its lower end.
The push valve 9 is tilted by the pull of the push-pull wire 11 to push the push valve 9. On the other hand, the other end of the push-pull wire 11 is connected to a lever 12 rotatably mounted on the front upper portion of the armrest substrate 3L, and the push valve 9 is opened and closed by rotating the lever 12 upward. I can do it.

The seat 13 on which a person sits is rotatably mounted on a shaft 15 fixed by screwing to a shaft support 14 projecting from the left and right armrest substrates 3R.3L. A stopper piece 16 protrudes in the vicinity of the pivotal portion of the seat portion 13, and this stopper piece 16 contacts the lower surface of the shaft support portion 14 to support the load in a substantially horizontal posture. Further, a spring 17 is provided inside the seat portion 13, and is urged by the action of the spring 17 so that the seat portion 13 is always rotated to the upright posture.

Thus, the operating piece 10 for opening and closing the push valve 9
, A rotatable roller 18 is attached to the upper end.
A cam member 19 is in contact with the cam member. The cam member 19 is urged by the action of the spring 20 so that the front portion always rotates upward. However, since the cam member 19 is engaged with the pin 21 protruding from the side surface of the seat portion 13, Following the horizontal position shown in FIG. 13, the vehicle takes a position slightly downward in FIG. The contour of the cam member 19 has a concave surface 19a which does not operate the operating piece 10 in the upright posture and the forwardly inclined posture.
19b and a convex surface 19c which is located between the concave surfaces 19a and 19b and presses the operating piece 10 with the rotation of the cam member 19.

 Next, the operation will be described.

First, the normal non-use state is as shown in FIG.
13 is in an upright position by the urging of the spring 17, and the gas spring 8 is extended and the backrest 5 is in an upright position.

In order to change from this state to the sitting state, first, the seat 13 is turned to the horizontal posture. Then, the pin 21 of the seat 13 presses the cam member 19, and the cam member 19 also assumes a tilting posture.

Next, when the lever 12 is pulled upward and the lower end of the operating piece 10 is pulled, the push valve 9 is opened, and the gas spring 8 is opened.
Becomes free. When the backrest 5 is pressed on the back in this state, the backrest 5 tilts while compressing and compressing the gas spring 8. When the hand is released from the lever 12 at an arbitrary position, the push valve 9 closes and the gas spring 8 is locked,
The backrest 5 is fixed.

 Next, the operation at the time of the backward movement will be described.

When a person stands from the seat 13, the seat 13 returns to the upright posture by the bias of the spring 17. This returning speed is moderate due to the relationship between the weight of the seat 13 and the strength of the spring 17. As the seat 13 rises, the cam member 19 is released from the pressure of the pin 21 and rotates in the direction in which it rises by the action of the spring 20. At this time, the convex surface 19c of the cam member 19 pushes the roller 18 to push the operating piece 10
To tilt. Thereby, the push valve 9 is opened, the gas spring 8 is extended by its own force, and the backrest 5 is erected. The strength of the spring 20 is set so that the cam member 19 can be rotated with a sufficient time for the backrest 5 to stand. However, if the force of the spring 20 is weakened for some reason, the convex surface 19c of the cam member 19
May stop while pressing the operating piece 10,
An auxiliary pin 21a protrudes from a side surface of the seat portion 13, and the auxiliary pin 21a contacts and presses the rear portion of the cam member 19 so that the cam member 19 is forcibly rotated. However, this is only an auxiliary to prevent malfunction, and usually a spring
The cam member 19 is rotated by the force of 20. Thus, when the cam member 19 rotates and the roller 18 fits on the concave surface 19b, the gas spring 8 is locked and the backrest 5 is fixed. Therefore, even if the backrest 5 unexpectedly leans in an emergency or the like, the backrest 5 is not rotated and is safe.

Further, in the present embodiment, a linking member 22 is added in order to ensure the returning operation of the backrest 5 and facilitate the operation of standing up by a person and to ensure safety. The linking member 22 is integrally fixed to the body of the gas spring 8, and when the gas spring 8 is contracted and the backrest 5 is tilted, the stopper piece 16 of the seat 13 collides against the upper surface of the backrest 5, and the seat 13 is
Is temporarily stopped. The link member 22
The cam member 19 is forcibly rotated by the action of the auxiliary pin 21a when the force for forcibly erecting the seat portion 13 by, for example, human force acts on the back portion 5 for a sufficient time. This is intended to prevent a situation in which the backrest 5 is in a tilted posture as described above, in order to prevent a situation in which the backrest 5 is in a tilted position as well as to prevent a situation in which the backrest 5 is in a tilted position when a person stands up and a person stands up.
The cam member 19 is also temporarily stopped by the pin 21 of the seat 13 because the member 13 cannot stand up against the link member 22, and the push valve 9 is kept open during that time. When the backrest 5 is completely erected and the linking member 22 is disengaged from the seat 13, the seat 13 is erected, and the cam member 19 is also erected. Further, a safety device 23 is further added to the link member 22. The safety device 23 is, as described above,
It is not necessary at all in the normal case of tilting the backrest 5 and then the backrest 5, but on the contrary, the effect is obtained when the backrest 5 is moved down first and then the seat 13 is irregularly operated. Demonstrate.
That is, the linking member 22 and the stopper piece 16 of the seat 13 are
In the state where the backrest 5 is in the tilting posture, the backrest 5 is in a position where it abuts with each other.
When the user attempts to tilt the stopper 13, the stopper piece 16 hits the linking member 22 and cannot rotate. In view of this, the safety device 23 pivotally mounts a rocking body 24 that rotates counterclockwise in FIG. 5 but does not rotate in the reverse direction above the linking member 22, and pulls the rocking body 24 in one direction by a spring 25. By doing so, when the stopper piece 16 hits from above the rocking body 24, the rotation of the seat portion 13 is prevented without turning, and the stopper piece 16 abuts so as to push up from below the rocking body 24. In this case, the rocking body 24 is rotated to escape as shown by the chain line in FIG. 5, so that the rotation of the seat 13 is not hindered.

Although the embodiment of the present invention has been described above, the cam member 19 can be directly attached to the seat 13 without separating the cam member 19 and the seat 13 as in this embodiment.

Although the present embodiment has been described for a theater / movie theater, it is of course possible to apply the present invention to a reclining seat for an airplane or a ship.

〔The invention's effect〕

As described above, according to the present invention, the upright backrest is secured by the gas spring, so that it is safe without unexpectedly leaning down and falling down with the backrest in an emergency or the like. It can be a support for elderly people when walking.

In addition, since the pivoting operation of the seat to the standing posture is temporarily stopped in the middle by the linking member, the seat does not rise together with the feet and buttocks when standing up, so that it is easy to stand. Therefore, there is an effect that the danger that a small child or the like is pushed by the seat and falls down is also prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a reclining seat, FIG. 2 is an enlarged perspective view of a main part, FIG. 3 is a sectional side view showing a main part, and FIG. FIG. 5 is a cross-sectional side view showing a state in which the safety device has been operated. 1 ... pillar, 4 ... fixed part, 5 ... backrest, 8 ... gas spring, 9 ... push valve, 12 ... lever, 13
... Seat 19, cam member 22, link member.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A47C 1/024 A47C 1/121

Claims (1)

(57) [Claims] A backrest pivotally attached to a fixed portion integral with a pillar, and a backrest pivotally attached to the fixed portion so as to be rotatable between a sitting horizontal position and a standing position when not in use; And, a seat portion which is always urged to rotate to a standing posture, both ends are pivotally attached to a part of the backrest and a part of the fixed portion, respectively, and the axial length thereof is changed to change the length of the backrest. A gas spring that controls a tilting posture, a cam member that rotates in conjunction with the rotation of the seat portion, and has a profile that presses and opens a push valve of the gas spring only during the rotation, A lever that can press and open the push valve of the gas spring to tilt the backrest regardless of the horizontal and standing posture of the seat, and a lever that is integrally fixed to the body of the gas spring and stands up. Such as a link member that temporarily stops the pivoting movement The cam member opens the push valve of the gas spring in conjunction with the operation of the seat portion returning from the horizontal posture to the standing posture while temporarily stopping halfway, and restoring the gas spring accompanying the opening operation of the push valve. The backrest is returned to the upright posture by force, and when the seat is in the horizontal or upright posture and the backrest stands up, the backrest cannot tilt unless the lever is operated. Automatic reclining device for reclining seats.